WO2014030316A1

WO2014030316A1 - Piping joint, piping joint structure, leak prevention method using piping joints, flanged tubes, and tube joint structures

Info

Publication number: WO2014030316A1
Application number: PCT/JP2013/004801
Authority: WO
Inventors: 博森武; 新吾須藤
Original assignee: 積水化学工業株式会社
Priority date: 2012-08-21
Filing date: 2013-08-08
Publication date: 2014-02-27

Abstract

Provided are a piping joint, a piping joint structure, and a leak prevention method using piping joints capable of circulating a high pressure fluid and of preventing fluid leaks. This piping joint (100) joins a resin piping (500) for circulating a high pressure fluid (FL) and a metal piping (600), and comprises a cylindrical section (120) fitting inside the metal piping (600), a cylindrical section (130) fitting inside the resin piping (500) and linking with the cylindrical section (120), a flange plate (140) provided between cylindrical section (120) and cylindrical section (130), and an O-ring (180) provided on the outer circumference of cylindrical section (120) and cylindrical section (130).

Description

Piping joints, piping joint structures, water leakage prevention methods using pipe joints, flanged pipes, pipe joint structures

The present invention relates to a pipe joint for connecting pipes through which a high-pressure fluid flows, a pipe joint structure, and a water leakage prevention method using the pipe joint. The present invention also relates to a flanged tubular body in which a flange joint is connected to an end of the tubular body and a tubular joint structure.

Conventionally, various joints have been developed as methods for connecting pipes through which fluid flows.
For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-295781) discloses a flange joint for a composite pipe having excellent internal pressure resistance.

In the flange joint described in Patent Document 1, an inner layer made of synthetic resin formed into a tubular shape, a reinforcing layer formed by spirally winding a stretched polyolefin resin sheet on the outer peripheral surface of the inner layer, and this Flange adapter formed of a composite pipe short tube having a synthetic resin outer layer laminated on a reinforcing layer and a tubular member formed of a single synthetic resin and having a wall thickness greater than that of the composite pipe short tube A flange adapter is abutted and fused to the tip of the short pipe of the composite pipe, and a reinforcing member is attached to the outer peripheral surface of the butt fused part.

Further, Patent Document 2 (Japanese Patent Laid-Open No. 2006-10041) discloses a flange that is used when the underground pipe line is lined with a resin-made rehabilitation pipe, and when the sleeve of the water stop pad is expanded at the attachment pipe port. The water stop pad which can prevent a part from deform | transforming and can exhibit sufficient water stop and the water stop method of an attachment pipe port are disclosed.

In the water stop pad described in Patent Document 2, a cylindrical sleeve having an outer shape smaller than the inner diameter of the attachment tube and a flange projecting in a bowl shape from one end edge portion of the cylindrical sleeve are integrally formed, A synthetic rubber adhesive is applied to the surface of the flange, and a protective ring capable of preventing deformation of the cylindrical sleeve is disposed on the outer periphery of the cylindrical sleeve.

Furthermore, Patent Document 3 (Japanese Patent Laid-Open No. 2012-31985) discloses a connection structure for resin pipes that can be easily connected and disconnected and has excellent bonding strength.

In the connection structure of the resin pipes described in Patent Document 3, a fitting part that surrounds and sandwiches both flange parts from the outer peripheral side in a state in which the flange parts of two resin pipes having flange parts at one end face each other. A resin pipe joining structure in which two resin pipes are joined by a joining member comprising a pair of split bodies, the split body extending from the fitting portion along the outer wall of the resin pipe, and the other split body And a resin tube reinforcing portion that surrounds the outer wall of the resin tube and reinforces the resin tube, and the axial length of the resin tube reinforcing portion is 1/3 of the outer diameter of the resin tube. It is set above.

In general, multi-layer pipes that are reinforced with a fiber-reinforced plastic (hereinafter referred to as FRP) layer on the outer peripheral surface of a rigid polyvinyl chloride pipe to improve pressure resistance and heat resistance are lightweight and have extremely high chemical resistance. Therefore, it is widely used as industrial pipes.

Patent Document 4 (Japanese Patent Application Laid-Open No. 2012-132502) discloses a novel flanged tube structure that can be connected to another tube by a simple operation, and the flanged tube connected to another tube. A pipeline structure is disclosed.

The flanged tube structure disclosed in Patent Document 4 is a flanged tube structure in which a flange joint is locked to the tube, and this flanged tube structure is formed on the outer peripheral surface of the short tube with another tube. A flange joint provided with a flange portion to be connected to the opening of the body, a tubular body inserted into a short pipe in the flange joint, and a cylindrical divided member sheathed on the tubular body. On the inner peripheral surface of the tube, a tapered portion is provided that expands the inner diameter from one opening end side toward the other opening end side, and the tube body is connected at one end to the opening portion of another tube body. The split member has a cylindrical body provided with a single slit portion that cuts a cylindrical wall from one cylindrical port to another cylindrical port, or a plurality of slit portions that cut the cylindrical wall from one cylindrical port to another cylindrical port. Multiple divided minutes A short tube abutting portion having a shape along the taper portion, the outer diameter of which extends along the outer peripheral surface from one tube port side toward the other tube port side. In a state where the other open end of the short pipe is directed to the connection opening of the pipe body, the pipe body is inserted into the short pipe, and one tube port is directed to the other open end of the short pipe in the flange joint. The split member is externally attached to the pipe body, and an elastic filler is interposed in the slit portion, and the flange joint is moved toward the split member along the pipe body so that the taper portion and the short pipe contact portion are slid. By pressing the split member into an annular gap existing between the outer peripheral surface of the pipe body and the tapered portion while being in contact with each other, a clamping force toward the pipe body is generated in the split member, so that a flange joint is attached to the pipe body. It is characterized by being locked It is intended.

Japanese Patent Laid-Open No. 2002-295781 JP 2006-10041 A JP 2012-31985 JP 2012-132502 A

Conventionally, metal pipes have been mainly used as high-pressure pipes for circulating a high-pressure fluid. When these high-pressure pipes, ie, metal pipes and metal pipes, are connected by welding.
However, in recent years, there has been a demand for connection of a high-pressure pipe and removal of the high-pressure pipe for cleaning and maintenance of the high-pressure pipe. Therefore, development of a pipe joint for high-pressure pipes is desired.
Furthermore, in recent years, a high-pressure resin pipe for circulating a high-pressure fluid has been developed.

In the flanged tube structure described in Patent Document 4, it can be connected to another tube by a simple operation.
However, in the flanged tube structure described in Patent Document 4, the flange portion is water-stopped by an O-ring or a gasket, which is not suitable for circulating a high-pressure fluid.

An object of the present invention is to provide a pipe joint, a pipe joint structure, and a water leakage prevention method using a pipe joint that allow a high-pressure fluid to flow and prevent fluid leakage.
Another object of the present invention is to provide a pipe joint structure that circulates a high-pressure fluid, prevents fluid leakage, and improves transport efficiency.
Furthermore, another object of the present invention is to provide a flanged tube body and a tube joint structure capable of circulating a high-pressure fluid.
Finally, another object of the present invention is to provide a flanged tubular body and a tubular joint structure that can increase the efficiency of transportation of the tubular body and allow high-pressure fluid to flow.

(1)
A pipe joint according to one aspect is a pipe joint that connects one pipe and another pipe, and is connected to the inside of the pipe of the one pipe, communicates with the first cylinder part, and other pipes The second cylinder part fitted inside the pipe, the flange part provided between the first cylinder part and the second cylinder part, and the outer periphery of the cylinder part of the first cylinder part and the second cylinder part And a water leakage preventing member.

In the pipe joint according to the present invention, a flange portion is provided between the first tube portion and the second tube portion communicating with the first tube portion. In addition, a water leakage preventing member is provided on the outer periphery of the cylindrical portion of the first cylindrical portion and the second cylindrical portion.

In this case, the first tube portion is fitted to the inner peripheral surface of one pipe, and the second tube portion is fitted to the inner peripheral surface of another pipe. An inner surface water stop (water leakage prevention) on the inner peripheral surface of one pipe can be realized by the water leakage preventing member provided on the outer periphery of the first cylindrical portion. Moreover, the inner surface water stop (leakage prevention) in other piping is realizable by the water leakage prevention member provided in the cylinder part outer periphery of the 2nd cylinder part.
As a result, even when a high-pressure fluid is flowed from one pipe to the other pipe side, fluid leakage can be prevented. In addition, the high pressure of said high pressure fluid shows the range of 1 Mpa or more and 50 Mpa or less.
Further, examples of the water leakage prevention member include other water leakage prevention members such as an O-ring and a gasket.

(2)
A pipe joint according to a second invention is a pipe joint according to one aspect, wherein at least one of the first cylinder part and the second cylinder part has a cylinder part outer peripheral recess, and the water leakage preventing member is a cylinder part outer peripheral recess. It may be attached to.

In this case, a cylindrical outer peripheral concave portion is formed in at least one of the first cylindrical portion and the second cylindrical portion. Moreover, since the leakage preventing member is attached to the outer peripheral concave portion of the cylindrical portion, it is possible to prevent the leakage preventing member from being displaced and to reliably prevent leakage.

(3)
The pipe joint according to the third invention is a pipe joint according to one aspect or a pipe joint according to the second invention, wherein the outer diameter of the first cylinder part and the outer diameter of the second cylinder part are different. It may consist of.

In this case, since the outer diameter of the first cylinder part and the outer diameter of the second cylinder part are different from each other, even if the one pipe that circulates the high-pressure fluid and the other pipe are different in diameter. Can support connection.

(4)
The pipe joint according to the fourth invention is a pipe joint according to one aspect, or a pipe joint according to the second invention, wherein the outer diameter of the first cylinder part and the outer diameter of the second cylinder part are the same diameter. It may consist of.

In this case, since the outer diameter of the first cylinder part and the outer diameter of the second cylinder part are the same diameter, even if one pipe that circulates the high-pressure fluid and the other pipe are pipes having the same diameter. Can respond.

(5)
A pipe joint according to a fifth invention is a pipe joint according to one aspect, a pipe joint according to the second to fourth inventions, wherein the inner diameter communicating with the inner diameter of the first cylinder part and the inner diameter of the second cylinder part is continuous. An inclined curved surface may be included.

In this case, the flow of fluid that communicates the inner diameter of the first cylinder part and the inner diameter of the second cylinder part can be adjusted. That is, since a sudden change is not caused, the generation of a large turbulent flow can be prevented.

(6)
A pipe joint according to a sixth invention is a pipe joint according to one aspect, a pipe joint according to the second to fifth inventions, wherein the communication direction lengths of the first cylinder part and the second cylinder part are different. Good.

In this case, the communication direction length of the first tube portion and the second tube portion is different, so that when the high-pressure fluid flows in the upstream pipe, the communication direction length can be increased.

(7)
A pipe joint according to a seventh invention is a pipe joint according to one aspect, a pipe joint according to the second to sixth inventions, and an inner periphery and an end of at least one of the first cylinder part and the second cylinder part Further, a taper shape may be formed.

In this case, since the tapered shape is formed at the inner periphery and at the end of at least one of the first tube portion and the second tube portion, turbulent fluid flow is prevented when the high-pressure fluid passes through the pipe joint. Thus, laminar flow can be maintained.

(8)
The pipe joint according to the eighth invention is a pipe joint according to one aspect, a pipe joint according to the second to seventh inventions, wherein at least the flange portion may be made of metal.

In this case, since at least the flange portion is made of metal, it is possible to easily insert the pipe joint into one pipe and another pipe using an instrument (jig) such as a vise. Further, the entire pipe joint may be made of metal, and the first tube portion and the second tube portion of the pipe joint may be made of resin, and only the flange portion may be made of metal.

(9)
A pipe joint according to a ninth invention is a pipe joint according to one aspect, a pipe joint according to the second to eighth inventions, wherein at least one of the first cylinder part and the second cylinder part is made of resin. Good.

In this case, at least one of the first tube portion and the second tube portion is made of resin, so that molding or processing becomes easy, and the cost and weight are reduced compared to the case where the entire pipe joint is made of metal. There are benefits. Further, the entire pipe joint may be made of resin, and the first tube portion and the second tube portion of the pipe joint may be made of resin, and only the flange portion may be made of metal.

(10)
A pipe joint according to a tenth invention is a pipe joint according to one aspect, a pipe joint according to any one of the second to ninth inventions, wherein the flange part is a flange part of one pipe and another pipe. You may have a through-hole corresponding to the fixed hole formed in the flange part.

In this case, since the flange portion of the pipe joint has a through hole corresponding to the fixed hole formed in the flange portion of one pipe and the flange portion of the other pipe, either one of the one pipe or the other pipe is Even if it is resin piping, positioning of a pipe joint can be performed reliably.
Moreover, a tap groove may be attached to the through hole, a hole that is not allowed to penetrate, or a tap groove that is not allowed to penetrate may be provided.

(11)
A pipe joint according to an eleventh invention is a pipe joint according to one aspect, a pipe joint according to any one of the second to ninth inventions, wherein the flange portion is a fixed portion formed on the flange portion of one pipe. You may have the hole with a tap groove formed corresponding to the hole, and the hole with a tap groove formed corresponding to the fixed hole formed in the flange part of other piping.

In this case, since a hole with a tap groove is provided for each pipe, the pipe joint can be easily attached to the pipe. Moreover, since one piping can be attached after the other piping is attached, working efficiency can be improved.

(12)
A pipe joint structure according to a twelfth aspect of the present invention is a pipe joint structure including the pipe joint according to any one of claims 1 to 11, one pipe, and another pipe. At least one of the pipes is a flange joint in which a pipe body having a first diameter expanding toward the end of the pipe, and a flange portion for connecting to another pipe on the outer peripheral surface of the short pipe And a semi-cylindrical core member inserted between the outer peripheral surface of the tubular body having the first diameter shape and the inner peripheral surface of the short pipe of the flange joint.

In this case, the tubular body having the first diameter shape expands toward the end of the pipe. As for the flange joint, the flange part for connecting to other piping is provided in the outer peripheral surface of the short pipe. The semi-cylindrical core member is inserted between the outer peripheral surface of the tubular body having the first diameter shape and the inner peripheral surface of the short pipe of the flange joint.

In this case, even when a high-pressure fluid is flowed from one pipe to the other pipe side, fluid leakage can be prevented.
Further, since the flange joint can be removed, the flange portion does not take up space during transportation or the like, and transportation efficiency can be improved.

(13)
A water leakage prevention method using a pipe joint according to another aspect includes a first tube portion, a second tube portion communicating with the first tube portion, and a flange provided between the first tube portion and the second tube portion. And a pipe joint that connects one pipe through which a high-pressure fluid flows and another pipe using a pipe joint that includes a water leak prevention member provided on the outer circumference of the cylinder section of the first cylinder section and the second cylinder section A method for preventing water leakage by inserting a first cylindrical portion into one pipe and compressing and deforming a water leakage preventing member on the inner surface of the pipe and the outer surface of the first cylindrical portion. A first step and a second step of inserting a second tube portion into another pipe and compressing and deforming the water leakage preventing member between the inner surface of the other pipe and the outer surface of the second tube portion to prevent water leakage. Is included.

In this case, a 1st cylinder part is inserted in the inside of one piping, and a 2nd cylinder part is inserted in the inside of other piping. An inner surface water stop (prevention of water leakage from the inner surface) on the inner peripheral surface of one pipe can be realized by the water leakage preventing member provided on the outer periphery of the first cylindrical portion. Moreover, the inner surface water stop (leakage prevention from an inner surface) in other piping is realizable by the water leakage prevention member provided in the cylinder part outer periphery of the 2nd cylinder part.
As a result, fluid leakage can be prevented even when a high-pressure fluid flows from one pipe to another pipe. In addition, the high pressure of said high pressure fluid shows the range of 1 Mpa or more and 50 Mpa or less.

(A)
A pipe joint according to the present invention is a pipe joint according to any one of the pipe joint according to one aspect to the eleventh invention, wherein the pipe joint is inserted into at least one of the one pipe or the other pipe. A guide shape may be formed at the end of the inner peripheral surface.

Here, since resin piping is mainly formed by extrusion molding, variation in inner diameter is large. Therefore, the pipe joint can be smoothly inserted by forming the guide shape at the end of the inner peripheral surface of the resin pipe into which the pipe joint is inserted.
In addition, said induction | guidance | derivation shape shows the curved surface or inclined surface provided in a part or whole periphery of the inner periphery in an edge part.

(14)
A flanged tubular body according to another aspect is a flanged tubular body that is locked to at least one end of a tubular body, and has a first diameter shape that expands toward the end of the tubular body. A body, an inner surface corresponding to the first radial shape, a second radial shape that expands toward the end of the tubular body, and a dividing member that divides the circumference, and an inner surface corresponding to the second radial shape And an annular flange portion for connection to an opening of another tubular body.

The tube having the first diameter shape expands toward the end of the tube. The dividing member that divides the circumference has an inner surface corresponding to the first diameter shape and a second diameter shape that expands toward the end of the tubular body. The annular flange portion has an inner surface corresponding to the second diameter shape. Therefore, the dividing member is attached to the outer periphery of the tubular body having the first diameter shape, and the annular flange portion is attached to the outer periphery of the dividing member.

In this case, since the annular flange portion can be removed, the efficiency at the time of transporting the tubular body can be increased. That is, since the useless space at the time of transferring the tubular body by the flange can be eliminated, the efficiency at the time of conveyance can be improved. In addition, the flanged tube can be formed by a simple operation in a short time and can be efficiently connected to another tube.
Further, the annular flange portion may be made of any other material such as metal, wood, resin, etc., and is preferably made of a material suitable for high pressure fluid. As a result, the flanged tube can circulate high-pressure fluid.

(15)
In a fifteenth aspect of the present invention, in the tubular body with a flange, the first diameter shape is a shape that gradually expands toward an end portion, and the inner peripheral surface of the divided member is in accordance with the first diameter shape. The first taper surface is formed, and the second diameter shape is a shape that gradually expands toward the end portion, and a second taper corresponding to the second diameter shape is formed on the inner peripheral surface of the annular flange portion. A surface may be formed.

In this case, the first taper surface is in sliding contact with the first diameter shape, and the second taper surface is in sliding contact with the second diameter shape. Therefore, the annular flange portion can be easily attached to the pipe body. As a result, it is possible to form a flanged tube body with a simple operation in a short time, and to efficiently connect it to another tube body, and to firmly attach the annular flange portion toward the end portion of the tube body.

(16)
In a sixteenth aspect of the present invention, in the above-described flanged tubular body, the taper angle based on the extending direction (longitudinal direction) of the tubular body may be different between the first tapered surface and the second tapered surface.

In this case, since the taper angles of the first taper surface and the second taper surface are different, the force applied to the annular flange portion and the tubular body can be dispersed, and the annular flange portion and the tubular body can be prevented from being damaged. it can.

(17)
In a seventeenth aspect of the present invention, in the above-described flanged tubular body, the first tapered surface may have a smaller taper angle with respect to the extending direction (longitudinal direction) of the tubular body than the second tapered surface.

In this case, the first taper surface has a smaller taper angle with respect to the extending direction (longitudinal direction) of the tube than the second taper surface, so that the force applied to the annular flange portion and the tube is gradually dispersed. be able to.

(18)
According to an eighteenth aspect of the present invention, in the tubular body with a flange, a hole for connecting to an opening of another tubular body may be formed in the annular flange portion.

In this case, since the hole for connecting to the opening of another tubular body is formed in the annular flange, a bolt that communicates the hole of the annular flange and the opening of another tubular body is provided. It is possible to connect the flanged tube and another tube.

For example, connecting jigs and holes may be alternately formed in the annular flange portion. Generally, a plurality of bolts are used for fastening the annular flange portion, and it is necessary to uniformly tighten the plurality of bolts in order to prevent leakage. Therefore, in order to prevent flange rotation, a method of increasing the tightening torque diagonally or stepwise is employed. In this case, when the connection jig is finally tightened, temporary fixing can be performed with a bolt and a nut using the hole.

The first radial shape, the second radial shape, the first taper surface, or the second taper surface has a linear shape including a tapered portion when cut in the longitudinal direction of the tubular body. It may be a curved shape. Furthermore, when it is a linear shape, the shape in which a taper angle changes in the middle of a taper surface may be sufficient.

Further, when the outer shape including the tapered portion is a curved shape, the angle formed by the tangent of the curved shape of the outer shape of the tapered portion on the base end side (the side having the smallest diameter shape) of the tapered portion and the longitudinal direction of the tubular body is set. Called the taper angle.
Further, when the taper angle changes in the middle of the taper surface, the angle formed by the straight line of the outer shape of the taper portion on the proximal end side (the side having the smallest diameter shape) of the taper portion and the longitudinal direction of the tubular body is tapered. Called the corner.

(19)
A pipe joint structure according to another aspect is a pipe joint structure that connects one pipe body through which a high-pressure fluid flows and another pipe body, and forms at least one of the one pipe body and the other pipe body. A flanged tubular body according to any one of claims 14 to 17, and a tubular joint provided between one tubular body and another tubular body. A first tube portion fitted inside the tube body of the tube body, a second tube portion communicating with the first tube portion and fitted inside the tube body of another tube body, and the first tube portion And a flange portion provided between the first tube portion and the second tube portion, and a water leakage preventing member provided on the outer periphery of the tube portion of the first tube portion and the second tube portion.

In this case, fluid leakage can be prevented even when a high-pressure fluid flows from one pipe to the other. Moreover, since an annular flange part can be removed, in the case of conveyance etc., a flange part does not take a space and can improve the efficiency at the time of conveyance.

As described above, according to the present invention, a high-pressure fluid can be circulated and fluid leakage can be prevented.

In addition, according to the present invention, since the annular flange portion can be removed, the efficiency at the time of transporting the tubular body can be increased, and the flanged tubular body can be efficiently formed by a simple operation in a short time. Can be connected to the tube.

It is a typical top view showing an example of a piping joint concerning this embodiment. It is a typical side view of the piping joint shown in FIG. FIG. 2 is a schematic cross-sectional view showing an example of a cross section taken along line AA in FIG. 1. It is a partially expanded sectional view for demonstrating the cross section of a piping joint. It is typical sectional drawing which shows an example which attaches a piping joint between resin piping and metal piping. It is typical sectional drawing for demonstrating the effect at the time of attaching a pipe joint between resin piping and metal piping. It is typical sectional drawing which shows the other example which attaches a pipe joint between the resin piping shown in FIG. 5, and metal piping. It is typical sectional drawing which shows the piping joint structure using the resin piping of another example. It is a schematic plan view which shows the other example of a piping joint. It is a schematic plan view which shows the other example of a piping joint. It is a typical side view which shows the other example of a piping joint. It is a typical sectional view showing a BB line section of a pipe joint. It is typical sectional drawing which shows an example which attaches a piping joint between resin piping and metal piping. It is typical sectional drawing for demonstrating the state which attached the pipe joint between resin piping and metal piping. It is typical sectional drawing for demonstrating the state which attached the pipe joint between resin piping. It is typical sectional drawing for demonstrating the further another example of a piping joint. It is typical sectional drawing for demonstrating the further another example of a piping joint. It is a typical partial notch perspective view of the pipe body with a flange concerning an embodiment. It is a typical side view for demonstrating the assembly process of a pipe body with a flange. It is a typical side view for demonstrating the assembly process of a pipe body with a flange. It is a typical side view for demonstrating the assembly process of a pipe body with a flange. It is explanatory drawing which shows the relationship of the angle of a taper surface. It is a typical top view showing an example of a piping joint concerning this embodiment. It is a typical side view of the piping joint shown in FIG. It is typical sectional drawing of the piping joint shown in FIG. It is typical sectional drawing which shows the state by which the O-ring which is a water leak prevention member was attached to the recessed part. It is a schematic diagram which shows an example which attaches a pipe joint between a pipe body with a flange, and a metal pipe body. It is a schematic diagram for demonstrating the effect at the time of attaching a piping joint between a pipe body with a flange, and a metal pipe body. It is a schematic diagram for demonstrating the effect at the time of attaching a piping joint between a pipe body with a flange, and a metal pipe body. It is explanatory drawing explaining the other example which attaches a pipe joint to a pipe body with a flange, and connects a metal pipe body. FIG. 29 is a schematic diagram illustrating another example in which a plurality of flanged pipe bodies illustrated in FIG. 28 are used and a pipe joint is attached therebetween. It is a schematic diagram which shows the other example of the pipe body with a flange shown to FIG. 27 and FIG. It is a typical perspective view which shows the other example of an annular flange part. It is a typical perspective view which shows the other example of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part. It is a schematic diagram for demonstrating the time of use of an annular flange part.

100, 100a, 100b, 100c Piping joint 120, 130 Tube portion 140 Flange plate 150 Hole 180 O-ring 500 Resin piping 600 Metal piping C Inclined surface FL

High pressure fluid

1100, 1100a,

1100b Flange tube

1400, 1400a, 1400b Annular flange Part 1200 Tubing body 1210 Large diameter part 1300 Divided member 1301 First divided member 1302 Second divided

member

1500, 1500a Pipe joint 1520, 1530 Tubular part 1540 Flange plate 1580 O-ring TL1, TL2, TL4, TL5 Tapered surface

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Overall outline of piping joint>
FIG. 1 is a schematic plan view showing an example of a pipe joint 100 according to the present embodiment, FIG. 2 is a schematic side view of the pipe joint 100 shown in FIG. 1, and FIG. It is a typical sectional view showing an example of an AA line section.

As shown in FIGS. 1 and 2, the pipe joint 100 includes a flange plate 140 between the cylindrical portion 120 and the cylindrical portion 130.
As shown in FIG. 1, the flange plate 140 is provided with a plurality of holes 150 whose centers are located on concentric circles in a radial pattern. As will be described later, the hole 150 is used to fix the pipe joint 100 to the resin pipe 500 and the metal pipe 600 or to align the axis of the resin pipe 500 and the metal pipe 600 with the axis of the pipe joint 100. Has a positioning function.

Further, as shown in FIGS. 1 and 2, the cylindrical portion 120 and the cylindrical portion 130 are formed in a cylindrical shape. A concave portion 121 is provided on the outer peripheral surface of the cylindrical portion 120. A concave portion 131 is provided on the outer peripheral surface of the cylindrical portion 130. The concave portion 121 is provided so as to be connected around the outer periphery of the cylindrical portion 120. Further, the recess 131 is provided so as to be connected around the outer periphery of the cylindrical portion 130.

<Cross section of piping joint>
Next, as shown in FIG. 3, a hole 125 penetrating the cylindrical portion 120, the flange plate 140, and the cylindrical portion 130 is formed inside the pipe joint 100. An inclined surface C is provided on the inner peripheral surface of the end of the hole 125 on the cylindrical portion 120 side.
Similarly, an inclined surface C is also provided on the inner peripheral surface of the end portion of the hole 125 on the cylindrical portion 130 side.

<O-ring installation>
Next, FIG. 4 is a partially enlarged cross-sectional view showing a state in which an O-ring 180 that is a water leakage prevention member is attached to the recess 121 and the recess 131.

Here, when the nominal diameter of the resin pipe 500 and the metal pipe 600 (see FIGS. 5 and 6) connected to the pipe joint 100 in the present embodiment is 75A (name A), the cylinder portion 120 shown in FIG. The cylinder outer diameter L1 of 130 is 76.5 mm, and the groove diameter L2 is 68.5 mm. The outer diameter L3 of the flange plate 140 is 185 mm.

When the nominal diameter is 75A (name A), the O-ring 180 has an inner diameter of 64.6 mm and a cross-sectional diameter of 5.7 ± 0.15 mm (reference number: P65, JIS B2401). As shown in the enlarged view of FIG. 4, the crushing margin (L12 / L13) of the 0 ring 180 is preferably in the range of 20% to 30%.
In the present embodiment, as a result of actual measurement, when the nominal diameter is 75A (name A), the range of the crushing margin of the O-ring 180 is a range from 23.9% to 24.6%.

On the other hand, when the nominal diameter of the pipes 500 and 600 (see FIGS. 5 and 6) connected to the pipe joint 100 in the present embodiment is 200 A (name A), the

cylinder portions

120 and 130 shown in FIG. The diameter L1 is 192 mm, and the groove diameter L2 is 181.5 mm. The outer diameter L3 of the flange plate 140 is 412 mm.

In the present embodiment, when the nominal diameter of the pipes 500 and 600 (see FIGS. 5 and 6) connected to the pipe joint 100 in the present embodiment is 200 A (name A), the size of the O-ring 180 is the inner diameter. 179.5 mm, and the cross-sectional diameter is 8.4 ± 0.15 mm (nominal number: P180, JIS B2401). Even if the nominal diameter changes, as shown in the enlarged view of FIG. 4, it is preferable that the crushing distance (L12 / L13) of the 0-ring 180 is in the range of 20% to 30%.
In the present embodiment, as a result of actual measurement, when the nominal diameter is 200 A (name A), the crushing range of the O-ring 180 is a range from 21.7% to 27.0%.

In the present embodiment, two O-rings 180 are attached to both sides of the flange plate 140, but the number of O-rings 180 attached is not limited to this, the length of the

cylindrical portions

120 and 130, It may be appropriately determined in consideration of the type and pressure of the high-pressure fluid to be circulated, the configuration and constituent materials of the pipe joint 100, the mounting workability of the O-ring 180, and the like.
Different numbers may be attached to the cylindrical portion 120 side and the cylindrical portion 130 side from the flange plate 140. For example, two O-rings 180 on the cylindrical portion 120 side from the flange plate 140 and one on the cylindrical portion 130 side. The book may be attached.

<Attachment of resin piping 500 and metal piping 600>
5 is a schematic cross-sectional view showing an example of attaching the pipe joint 100 between the resin pipe 500 and the metal pipe 600. FIG. 6 shows the pipe joint 100 between the resin pipe 500 and the metal pipe 600. It is typical sectional drawing for demonstrating the effect at the time of attaching.

<When the entire piping joint 100 is made of metal>
For example, when the entire pipe joint 100 is made of metal, the tubular portion 130 of the pipe joint 100 is inserted into the pipe interior 515 of the resin pipe 500 as shown in FIG. In this case, the cylindrical part 130 of the pipe joint 100 can be easily inserted into the pipe interior 515 of the resin pipe 500 by sandwiching the flange plate 140 and the flange part 510 of the resin pipe 500 with an instrument such as a vise. .

In the resin pipe 500, since the manufacturing process is generally formed by extrusion molding, the outer shape of the resin pipe 500 is formed with a specified value, but the inner diameter L500 of the resin pipe 500 is less than the reference value. There are many variations. Even in this case, since the pipe joint 100 is made of metal, the pipe joint 100 can be easily inserted into the pipe interior 515 of the resin pipe 500.

On the other hand, the cylinder part 120 of the pipe joint 100 is inserted into the pipe interior 615 of the metal pipe 600. In this case, since the flange portion 510 of the resin pipe 500 and the flange plate 140 of the pipe joint 100 are already integrated, the flange portion 610 of the metal pipe 600 and the flange plate 140 are sandwiched by a device such as a vise. The pipe joint 100 can be easily inserted into the pipe interior 615 of the metal pipe 600 and attached.

Subsequently, as shown in FIG. 5, the bolt B is passed through the fixing hole of the flange portion 510 of the resin pipe 500, the hole 150 of the flange plate 140, and the fixing hole of the flange portion 610 of the metal pipe 600 and fixed with the nut N. . In the present embodiment, fixing is performed with eight bolts B and nuts N.

As a result, as shown in FIG. 6, the pipe joint 100 is accurately attached between the resin pipe 500 and the metal pipe 600.
The metal described in the above embodiment is, for example, bronze casting (BC6, BC6C), brass casting (YBsC3), modified brass drawing rod (extruded rod) (C3604BD (BE)), for casting Brass drawn rod (extruded rod) (C3771BD (BE)), phosphorous deoxidized copper tube (C1220T), chromium plating on copper alloy substrate (BCrM), nickel plating on copper alloy substrate (BNM), gray cast iron product (FC) ), Ductile cast iron (FCD), malleable cast iron (FCMB), carbon tool steel (SK), stainless steel (18Cr-8Ni) (SUS304), stainless steel (18Cr-12Ni-MO) (SUS316), stainless steel (18Cr-12Ni-) MO ultra low C) (SUS316L), aluminum alloy die casting (ADC), zinc alloy die casting (ZDC), etc. Laminated tube, it is possible to select the configuration and any material such as a composite tube. Furthermore, these metals may be subjected to rust prevention treatment such as plating or painting.

As shown in FIG. 6, for example, when the high-pressure fluid FL is caused to flow from the resin pipe 500 to the metal pipe 600, the inclined surface C of the pipe joint 100 causes the state of the high-pressure fluid FL passing through the pipe joint 100 to be a laminar flow. Has the function of maintaining the state.

<When only the pipe joints 120 and 130 are made of resin>
Moreover, when the

cylinder parts

120 and 130 of the pipe joint 100 are made of resin, the thickness of the

cylinder parts

120 and 130 is preferably in the range of 3 mm to 15 mm from the viewpoint of pressure resistance, and is in the range of 3 mm to 10 mm. More desirable.
If the thickness is less than 3 mm, the strength and rigidity are insufficient, and the

cylindrical portions

120 and 130 may be destroyed. Further, if the thickness is greater than 15 mm, when the cylinder part 130 is inserted into the pipe inside 515 of the resin pipe 500 or when the cylinder part 120 is inserted into the pipe inside 615 of the metal pipe 600, the reduced diameter inside the pipe is reduced. There is a risk that the flow resistance of the high-pressure fluid FL increases and the flow is hindered.
As shown in the enlarged view of FIG. 6, when the pressure of the high-pressure fluid FL in the

cylindrical portions

120 and 130 is high, the high-pressure fluid FL generates a force FS against the inclined surface C and the pipe joint 100 A force FV that pushes the hole 125 in the outer circumferential direction is generated.

As a result, the O-ring 180 is pressed against the pipe inside 515 of the resin pipe 500 and the pipe inside 615 of the metal pipe 600 by the force FV. As a result, even when a high-pressure high-pressure fluid FL is flowed, it is possible to prevent water from leaking from the vicinity where the pipe joint 100 is joined.

<When piping joint is resin>
When the entire pipe joint 100 is made of resin, the thickness of the

cylindrical portions

120 and 130 is desirably in the range of 5 mm to 15 mm from the viewpoint of pressure resistance, and the thickness of the flange plate 140 is from the pressure resistant surface. A range of 5 mm or more and 20 mm or less is desirable. If the thickness of the

cylindrical portions

120 and 130 is smaller than 5 mm, the strength and rigidity are insufficient, and the piping joint 100 made entirely of resin may be destroyed.

In addition, if the thickness of the

cylinder portions

120 and 130 is greater than 15 mm, the pipe portion 130 is inserted when the cylinder portion 130 is inserted into the pipe inside 515 of the resin pipe 500 or when the cylinder portion 120 is inserted into the pipe inside 615 of the metal pipe 600. There is a possibility that the internal diameter is significantly reduced, and the flow resistance of the high-pressure fluid FL is increased to hinder the flow.
Further, if the thickness of the flange plate 140 is smaller than 5 mm, the strength and rigidity are insufficient, and the flange plate 140 may be destroyed.
If the thickness of the flange plate 140 is greater than 20 mm, the thickness of the resin increases, and there is a risk that dimensional deviation is likely to occur due to shrinkage or the like.

As shown in the enlarged view of FIG. 6, when the pressure of the high-pressure fluid FL in the

cylindrical portions

Examples of the resin described in the above embodiment include hard vinyl chloride resin (polyvinyl chloride: PVC), acrylonitrile / butadiene / styrene resin (ABS), acrylonitrile / styrene resin (AS), and epoxy resin. (EP), melamine resin (MF), polycarbonate resin (PC), ethylene trifluoride resin (PCTFE), polyethylene resin (PE), methacrylic resin (acrylic resin: PMMA), acetal resin (POM), polypropylene resin (PP ), Polystyrene resin (PS), tetrafluoroethylene resin (PTFE), polyurethane resin (PUR) or polyvinyl acetate resin (PVAC), etc., fiber reinforced plastic (FRP), laminated tubes of these, composite tubes Any material and configuration can be selected .

(Other examples)
FIG. 7 is a schematic cross-sectional view showing another example in which the pipe joint 100 is attached between the resin pipe 500 and the metal pipe 600 shown in FIG. In another example, a resin pipe 500a is used instead of the resin pipe 500 shown in FIG. Others are the same as FIG.

As shown in FIG. 7, the resin pipe 500 a is provided with a guide portion 550 so that the pipe joint 100 can be easily inserted. The guide portion 550 has an inclined surface D formed at the inner peripheral end of the resin pipe 500a so that the pipe joint 100 can be easily inserted.
As a result, even when the inner diameter L500 varies due to extrusion, the pipe joint 100 can be easily inserted because the inclined surface D is formed at the end of the inner peripheral surface of the resin pipe 500a. it can.
In addition, although the guide part 550 demonstrated the inclined surface D by the example, it is not limited to this, Any of R shape, a curved surface, and another induction | guidance | derivation shape may be sufficient, The inner peripheral edge part whole piping inside 515, Or you may provide in a part of inner peripheral edge part.

(Piping joint structure)
FIG. 8 is a schematic cross-sectional view showing a pipe joint structure using a resin pipe of another example.

As shown in FIG. 8, a resin pipe 500b may be used instead of the

resin pipes

500 and 500a. The resin pipe 500b includes a pipe body 511, a core member 560, and a flange joint 570.
Further, a large-diameter portion 511 b where the outer diameter of the tube body 511 gradually increases is formed at the end of the tube body 511. The outer periphery of the large diameter portion 511b is a tapered surface. Further, a core member 560 is provided so as to circumscribe the tapered surface. The core member 560 has the same shape of a plurality of members. The flange joint 570 has a shape in which an annular flange portion is integrally provided on the outer peripheral surface of a cylindrical short pipe. A tapered surface having an inner peripheral surface shape corresponding to the tapered surface having the outer peripheral surface shape of the core member 560 is formed on the inner peripheral surface of the short pipe.

Since the flange joint 570 which is a flange part can be removed by using the resin piping 500b, transportation efficiency can be improved. That is, since the protruding portion of the flange can be removed, the resin piping 500b can be densely loaded. Furthermore, the use of the pipe joint 100 can prevent water leakage of the high-pressure fluid FL.

(Still other examples)
9 and 10 are schematic plan views showing other examples of the pipe joint 100, FIG. 11 is a schematic side view showing another example of the pipe joint 100, and FIG. 6 is a schematic cross-sectional view showing another example of the pipe joint 100. FIG.

9 shows a plane viewed from one side of the pipe joint 100, and FIG. 10 shows a plane viewed from the back side of one side of the pipe joint 100. FIG. 11 shows a schematic side view of FIGS. 9 and 10, and FIG. 12 shows a cross section taken along the line BB of FIGS.

First, as shown in FIGS. 9, 10, and 11, the pipe joint 100a includes a flange plate 140a between the cylindrical portion 120a and the cylindrical portion 130a.
As shown in FIG. 9, a plurality of holes 151 whose centers are located concentrically are provided radially on the surface side of the flange plate 140a. As will be described later, the hole 151 includes a hole provided with a tap to fix the pipe joint 100 to the pipe 500 and the pipe 600.
As shown in FIG. 10, a plurality of holes 152 whose centers are located concentrically are provided radially on the back side of the flange plate 140a. The hole 152 is formed so as to have a relative position different from that of the hole 151.
As with the pipe joint 100, the

holes

151 and 152 have a positioning function for aligning the axis of the pipe 500 and the pipe 600 with the axis of the pipe joint 100a.

Moreover, as shown in FIG. 11, the cylinder part 120a and the cylinder part 130a consist of a cylindrical shape. A concave portion 121a is provided on the outer peripheral surface of the cylindrical portion 120a. A concave portion 131a is provided on the outer peripheral surface of the cylindrical portion 130a. The concave portion 121a is provided so as to be connected around the outer periphery of the cylindrical portion 120a. Moreover, the recessed part 131a is provided so that one round may be connected along the outer periphery of the cylinder part 130a.

Further, the pipe joint 100a in another example is different from the pipe joint 100 in that the outer diameters of the cylinder part 120a and the cylinder part 130a are different. The cylinder part 120a is made of a diameter L22, and the cylinder part 130a is made of a diameter L33 (L22 <L33).

<Cross section of piping joint>
Next, FIG. 12 is a schematic cross-sectional view showing a cross section taken along line BB of the pipe joint 100a.
As shown in FIG. 12, the pipe joint 100a has a cylindrical portion 120a, a flange plate 140a, and a hole 125a penetrating the cylindrical portion 130a.

An inclined surface C is provided on the inner peripheral surface of the end portion of the hole 125a on the cylindrical portion 120a side and the inner peripheral surface of the end portion of the hole 125a on the cylindrical portion 130a side.
Further, unlike the pipe joint 100, the hole 125a of the pipe joint 100a has a cylindrical shape whose inner diameter decreases from the cylinder part 130a side to the cylinder part 120a side.
As shown in FIG. 12, the hole 125a on the cylinder part 130a side of the pipe joint 100a is made of a diameter L33a, and the hole 125a on the cylinder part 120a side is made of an inner diameter L22a (L22a <L33a).

A groove formed by a tap is provided on the inner surface of the hole 151, and a groove formed by a tap is also provided on the inner surface of the hole 152.
Moreover, in this example, the

holes

151 and 152 are formed without penetrating the flange plate 140a.
The

holes

151 and 152 may be provided as through holes as long as there is no problem in mounting the resin pipe 500 and the metal pipe 600.

<Installation of resin piping 500a and metal piping 600>
Next, FIG. 13 is a schematic cross-sectional view showing an example of attaching the pipe joint 100a between the resin pipe 500a and the metal pipe 600. FIG. 14 shows the pipe joint 100a between the resin pipe 500a and the metal pipe 600. It is typical sectional drawing for demonstrating the attached state.

As shown in FIG. 13, the metal pipe 600 has an inner diameter corresponding to the outer diameter L22a of the cylindrical portion 120a of the pipe joint 100a.
Bolts B are passed through holes formed in the flange portion 610 provided in the metal pipe 600, and the end portions of the bolts B are formed into holes 151 in which grooves are formed by taps formed on the flange plate 140a of the pipe joint 100a. Fixed.
The resin pipe 500a has an inner diameter corresponding to the outer diameter L33a of the tubular portion 130a of the pipe joint 100a.
Bolts B are passed through holes formed in the flange portion 510 provided in the resin pipe 500a, and the ends of the bolts B are formed into holes 152 in which grooves are formed by taps formed on the flange plate 140a of the pipe joint 100a. Fixed.

As a result, as shown in FIG. 14, the pipe joint 100 a is attached to the resin pipe 500 a and the metal pipe 600. In this case, even if the resin pipe 500a and the metal pipe 600 have different inner diameters, they can be easily connected and a high-pressure fluid can be circulated.
Further, by providing the

holes

151 and 152 in which grooves are formed by taps, nuts are not necessary, so that work efficiency can be improved.

Next, FIG. 15 is a schematic cross-sectional view for explaining a state in which the pipe joint 100a is attached between the resin pipe 500a and the resin pipe 500b.
As shown in FIG. 15, the pipe joint 100a can be easily attached between the

resin pipes

500a and 500b. Although not shown, a pipe joint 100a may be provided between the metal pipe 600 and the metal pipe 600 instead of the

resin pipes

500a and 500b.

(Still other examples)
Next, another example of the pipe joint 100a will be described. 16 and 17 are schematic cross-sectional views for explaining still another example of the pipe joint 100a.

A pipe joint 100b shown in FIG. 16 is provided with a cylinder part 130b instead of the cylinder part 130a of the pipe joint 100a. In the pipe joint 100a, the length from the flange plate 140a to the end of the cylinder part 120a and the cylinder part 130a is the same, but the pipe joint 100b shown in FIG. 16 is different from the length LL2 of the cylinder part 120a. The cylindrical portion 130b is provided so that the length LL3 (LL2 <LL3) becomes longer.
As a result, the pipe joint 100b can be more firmly attached to the pipe.

A pipe joint 100c shown in FIG. 17 includes

holes

125c and 126c of the pipe joint 100c. That is, it consists of a hole 125c and a hole 126c with respect to the hole 125a in the pipe joint 100a.
By forming the hole 125c and the hole 126c to have different inclination angles, the wall thickness t in the cylindrical portion 120a can be increased.
As a result, the pipe joint 100c can be formed more robustly.

(Example)
An experiment was performed using the pipe joint 100 described in the present embodiment. In the experiment, a pipe having a nominal diameter of 75A was used. In consideration of the safety factor of the product, a water pressure of 10.5 MPa was applied and maintained for 1 hour, but no water leakage from the joint portion of the pipe joint 100 was observed.

As described above, the cylinder portion 120 is fitted into the pipe interior 615 of the metal pipe 600, and the cylinder portion 130 is fitted into the pipe interior 515 of the resin pipe 500, so that O provided on the outer periphery of the cylinder portion 120 is obtained. The ring 180 can realize inner surface water stop (water leakage prevention) on the inner peripheral surface of the metal pipe 600, and the inner ring water stop (water leakage prevention) in the resin pipe 500 can be achieved by the O ring 180 provided on the outer periphery of the cylindrical portion 130. Can be realized.
As a result, even when the high-pressure fluid FL flows from the resin pipe 500 to the metal pipe 600 side, water leakage of the high-pressure fluid FL can be prevented.

In addition, since the inclined surface C is formed at the inner periphery and at the end of at least one of the cylinder part 120 and the cylinder part 130 of the pipe joint 100, the high-pressure fluid FL passes through the pipe joint 100. FL turbulence can be prevented and laminar flow can be maintained.

Moreover, since the flange plate 140 of the pipe joint 100 has the hole 150 corresponding to the fixing hole formed in the flange part 510 of the resin pipe 500 and the flange part 610 of the metal pipe 600, the pipe joint 100 is positioned reliably. be able to.

Moreover, since the recessed parts 121 and 131 are formed in at least one of the

cylinder parts

120 and 130, and the O-ring 180 is attached to the recessed parts 121 and 131, the O-ring 180 is prevented from being displaced and the prevention of water leakage is ensured. be able to.

Furthermore, even if one pipe that circulates the high-pressure fluid and the other pipe have different diameters or pipes having the same diameter, it can be dealt with by matching the diameters of the cylindrical portions.

Also, the fluid flow can be adjusted by the holes 125 having a continuous inclined curved surface. That is, since a sudden change is not caused, the generation of a large turbulent flow can be prevented.

In the present embodiment, the high-pressure fluid FL corresponds to a high-pressure fluid, the resin pipe 500 and the metal pipe 600 correspond to one pipe or another pipe, and the pipe joints 100, 100a, 100b, and 100c are pipe joints. The

cylindrical portions

120 and 120a correspond to the first cylindrical portion, the

cylindrical portions

130, 130a and 130b correspond to the second cylindrical portion, the

flange plates

140 and 140a correspond to the flange portion, and the

holes

125 and 125a. , 125c corresponds to a continuous inclined curved surface, the O-ring 180 corresponds to a water leakage prevention member, the inclined surface C corresponds to a tapered shape, and the pipe joint 100 and the pipe 500b in FIG. 8 have a pipe joint structure. The tube body 511 corresponds to the tube body, the

holes

151 and 152 in which grooves are formed by taps correspond to holes with tapped grooves, the flange joint 570 corresponds to a flange joint, Member 560 corresponds to the core member, holes 150 correspond to the through hole.

<Schematic structure of flanged tube 1100>
FIG. 18 is a schematic partially cutaway perspective view of the flanged tube body 1100 according to the present embodiment.
As shown in FIG. 18, the flanged tube body 1100 mainly includes a tube body 1200, a split member 1300, and an annular flange portion 1400.

(Tube 1200)
In the present embodiment, tube body 1200 is a cylindrical multilayer tube formed by reinforcing the outer peripheral surface of a rigid polyvinyl chloride tube with a fiber reinforced plastic (hereinafter referred to as FRP) layer.
Further, a large-diameter portion 1210 where the outer diameter of the tubular body 1200 gradually increases is formed at the end of the tubular body 1200. In the present embodiment, as shown in FIG. 18, the large-diameter portion 1210 includes a tapered surface TL1. In the present embodiment, the tapered surface TL1 is formed in the entire circumferential area of the tubular body 1200.

(Method for producing large diameter portion 1210)
As a manufacturing method of the large diameter portion 1210, there are a method of forming at a construction site and a method of forming at a production factory (prefab).

(Method of molding at construction site)
As a method of molding at the construction site, a method of molding the large diameter portion 1210 by a hand lay-up method, a filament winding (FW) method, a resin transfer molding method (RTM) or a vacuum resin transfer molding method (VaRTM), optical A method of molding the large-diameter portion 1210 with a curable resin or the like, or a method in which only a portion of the large-diameter portion 1210 is molded separately in advance to the tube body 1200 by a hand lay-up method or an adhesive, Other arbitrary methods such as a method in which a large diameter portion 1210 is formed by mechanically fixing a nut (insert nut) embedded in the FRP reinforcing layer of the tube body 1200 using a bolt or the like.

(Method of molding in production factory)
Moreover, as a method of forming at the production factory, in addition to the method of forming at the construction site, when the outer peripheral surface of the hard vinyl chloride pipe is reinforced with a fiber reinforced plastic (FRP) layer, the large diameter portion 1210 is also combined. Examples include a method in which glass fiber is wound thickly at a position, and after the FRP layer is formed, grinding and / or polishing is performed so as to obtain a first diameter shape.

The material of the tube body 1200 in the present embodiment is made of a fiber reinforced plastic (FRP) and a hard vinyl chloride resin that is a core material.
Here, the material of the pipe body 1200 is not limited to the present embodiment, but is a hard vinyl chloride resin (polyvinyl chloride: PVC), acrylonitrile-butadiene-styrene resin (ABS), acrylonitrile-styrene resin (AS). , Epoxy resin (EP), melamine resin (MF), polycarbonate resin (PC), ethylene trifluoride resin (PCTFE), polyethylene resin (PE), methacrylic resin (acrylic resin: PMMA), acetal resin (POM), polypropylene Synthetic resin pipes such as resin (PP), polystyrene resin (PS), tetrafluoroethylene resin (PTFE), polyurethane resin (PUR) or polyvinyl acetate resin (PVAC), fiber reinforced plastic (FRP), bronze casting (BC6 , BC6C), brass casting (YBsC3), modified brass drawing Rod (extruded rod) (C3604BD (BE)), brass drawing rod for casting (extruded rod) (C3771BD (BE)), phosphorous deoxidized copper tube (C1220T), copper alloy base chromium plating (BCrM), copper alloy Nickel plated (BNM), gray cast iron (FC), ductile cast iron (FCD), malleable cast iron (FCMB), carbon tool steel (SK), stainless steel (18Cr-8Ni) (SUS304), stainless steel (18Cr- 12Ni-MO) (SUS316), stainless steel (18Cr-12Ni-MO extra low C) (SUS316L), aluminum alloy die-casting (ADC) or zinc alloy die-casting (ZDC), etc., concrete tubes such as reinforced concrete tubes or prestressed concrete tubes Arbitrary materials and configurations such as pipes, ceramic pipes, laminated pipes and composite pipes It can be selected.

Further, the tubular body 1200 is not limited to a cylindrical body having a cylindrical shape, that is, a horizontal sectional shape cut by a horizontal plane perpendicular to the axial center. For example, the horizontal sectional shape has an egg shape (oval tube). ), A cylindrical body having a horseshoe shape, a square shape, or a further polygonal shape.

(Divided member 1300)
As shown in FIG. 18, the dividing member 1300 in the present embodiment includes a first dividing member 1301 and a second dividing member 1302.
The first divided member 1301 and the second divided member 1302 have the same shape. As shown in FIG. 18, the 1st division member 1301 and the 2nd division member 1302 form a cylinder shape by putting together both. That is, by dividing the dividing member 1300 vertically with a plane passing through the axis of the dividing member 1300, the shapes of the first dividing member 1301 and the second dividing member 1302 are obtained.

Further, the first divided member 1301 and the second divided member 1302 are each formed in a curved shape so as to sandwich the outer peripheral surface of the tubular body 1200 and the large diameter portion 1210 on the inner peripheral surface.
That is, the first divided member 1301 and the second divided member 1302 are formed with a curved surface TL3 corresponding to the outer peripheral surface of the tubular body 1200, and according to the tapered surface TL1 of the outer peripheral surface of the large diameter portion 1210. A tapered surface TL2 having a curved inner peripheral surface shape is formed.
Further, the first divided member 1301 and the second divided member 1302 are formed with a curved outer peripheral surface tapered surface TL4 corresponding to an inner peripheral surface of an annular flange portion 1400 described later.

The curved inner peripheral surface shape tapered surface TL2 and the curved outer peripheral surface shape tapered surface TL4 are formed on the inner peripheral surface or the entire outer peripheral surface of the first divided member 1301 and the second divided member 1302. However, the present invention is not limited to this, and the first divided member 1301 and the second divided member 1302 may be divided into a part or a plurality of inner peripheral surfaces or outer peripheral surfaces.
Alternatively, the shape of the tapered surface TL2 having a curved inner peripheral surface shape corresponding to the tapered surface TL1 of the outer peripheral surface of the large-diameter portion 1210 may be removed by removing the formation portion of the surface TL3.

In addition, the divided member 1300 is composed of the first divided member 1301 and the second divided member 1302, but is not limited thereto, and may be composed of one cylindrical member or three or more divided members.

The material of the dividing member 1300 in the present embodiment is made of fiber reinforced plastic (FRP).
Here, the material of the dividing member 1300 may be the same as or different from that of the tube body 1200.
Further, the material of the dividing member 1300 may be a synthetic resin tube or a fiber reinforced plastic (FRP) of various materials as well as the material of the tube body 1200, and other various materials such as a metal tube, a reinforced concrete tube or a prestressed tube. Arbitrary materials and structures, such as concrete pipes, such as concrete pipes, wood, ceramic pipes, these laminated pipes, and composite pipes, can be selected.
Furthermore, as long as the dividing member 1300 has a shape corresponding to the outer surface of the tubular body 1200 and the large diameter portion 1210 of the tubular body 1200, a cylindrical shape, an elliptical cylinder, a square cylinder, a polygonal cylinder, or the like may be used.

In addition, the dividing member 1300 may be configured by a member having a holdability such as a resin or a metal. In this case, the dividing member 1300 may be deformed into a shape that is in sliding contact with the outer peripheral surface of the tubular body 1200 and the large diameter portion 1210 and the inner peripheral surface of the annular flange portion 1400.

(Annular flange 1400)
As shown in FIG. 18, the annular flange portion 1400 is formed of an annular flange. On the inner peripheral surface of the annular flange portion 1400, a curved inner peripheral surface tapered surface TL5 corresponding to the curved outer peripheral surface tapered surface TL4 of the dividing member 1300 is formed.

The curved inner peripheral surface shape tapered surface TL5 is formed in the entire peripheral area of the inner peripheral surface of the split member 1300, but is not limited to this, and a part or a plurality of inner peripheral surfaces of the annular flange portion 1400 are formed. It may be divided into two.

The annular flange portion 1400 is made of a fiber reinforced resin obtained by impregnating a glass reinforced fiber with a thermosetting resin.
Here, the material of the annular flange portion 1400 may be the same as or different from that of the tube body 1200. The material of the annular flange portion 1400 may be made of various materials such as synthetic resin tubes and fiber reinforced plastics (FRP), similar to the material of the tube body 1200. Arbitrary materials and structures, such as concrete pipes, such as a reinforced concrete pipe or a prestressed concrete pipe, a ceramic pipe, these laminated pipes, and a composite pipe, can be selected.

Further, in the present embodiment, the annular flange portion 1400 has been described. However, the present invention is not limited to this, and the inner peripheral surface of the annular flange portion 1400 has a horizontal cross-sectional shape that is an ellipse, a quadrangle, or a polygon. The inner peripheral surface may have a tapered surface TL5 in part.
Furthermore, the annular flange portion 1400 only needs to have an inner diameter into which the tubular body 1200 can be inserted. For example, when the outer peripheral shape of the dividing member 1300 is an ellipse, a rectangle, or a polygon, the annular flange portion 1400 is divided. What is necessary is just to have the taper surface TL5 in the inner peripheral surface in at least one part by the shape according to each outer peripheral shape of the member 1300. FIG.

Also, the annular flange portion 1400 is provided with a plurality of through holes 1450 that penetrate from the front surface to the back surface. The through-hole 1450 serves as a portion into which a fastening member such as a bolt B (see FIG. 27) used when connecting to another flanged tube body 1100 and a metal tube body 1110 described later is inserted.

(Assembly process of flanged tube 1100)
Next, FIGS. 19, 20, and 21 are schematic side views for explaining the assembly process of the flanged tube 1100.

First, as shown in FIG. 19, the annular flange portion 1400 is inserted in the direction of the arrow -Y1 from the end portion side of the tube body 1200. The inner diameter L2 of the annular flange portion 1400 is provided larger than the outer diameter L1 of the large diameter portion 1210 of the tube body 1200 (see FIGS. 19 and 22).

Next, as shown in FIG. 20, the dividing member 1300 is attached to the large diameter portion 1210 of the tube body 1200. Specifically, the first divided member 1301 and the second divided member 1302 are attached to the large diameter portion 1210 from the outside (see FIG. 18). In this case, the surface TL3 of the first divided member 1301 and the second divided member 1302 is in sliding contact with the outer peripheral surface of the tubular body 1200 on the peripheral surface, and the first divided member 1301 and the tapered surface TL1 of the large diameter portion 1210 of the tubular body 1200 are contacted. The tapered surface TL2 of the second divided member 1302 is in sliding contact with the peripheral surface.
It should be noted that the sliding contact portion between the outer peripheral surface of the tubular body 1200 and the surface TL3 of the first divided member 1301 and the second divided member 1302, or the tapered surface TL1 of the large diameter portion 1210 of the tubular body 1200, and the first divided member 1301. In addition, part or all of the sliding contact portion with the tapered surface TL2 of the second divided member 1302 may be bonded or welded.

For example, in the case of welding, heating wires are embedded in the inner surfaces of the first divided member 1301 and the second divided member 1302 in advance, the divided member 1300 is attached to the large diameter portion 1210 of the tube body 1200, and then the controller is energized. Electrofusion (EF: electrofusion) in which heating wire is heated and the inner peripheral surface of the dividing member 1300, the outer peripheral surface of the tube body 1200, and the resin on the tapered surface TL1 of the large diameter portion 1210 are heated and melted and systematically integrated. ) At least a part of the sliding contact portion may be melt bonded by bonding. Note that a heating wire may be embedded in the large diameter portion 1210 of the tube body 1200 in advance.

Subsequently, as shown in FIG. 21, the annular flange portion 1400 attached to the tube body 1200 in FIG. 19 is in sliding contact with the outer peripheral surface of the split member 1300 attached to the tube body 1200 including the large diameter portion 1210. Are fitted in the direction of the arrow Y1.
In this case, the tapered surface TL5 on the inner circumferential surface of the annular flange portion 1400 and the tapered surface TL4 on the outer circumferential surface of the split member 1300 are in sliding contact, and the annular flange portion 1400 is attached. As a result, the flanged tube 1100 is easily formed.
A part or all of the sliding contact portion between the tapered surface TL5 on the inner peripheral surface of the annular flange portion 1400 and the tapered surface TL4 on the outer peripheral surface of the dividing member 1300 may be bonded or welded.

In the case of welding, a heating wire is embedded in the inner peripheral surface of the annular flange portion 1400 in advance, and after the split member 1300 is attached, the heater wire is energized to generate heat, and the outer surface of the split member 1300 and the annular flange portion 1400 are energized. At least a part of the sliding contact portion may be melt-bonded by electrofusion (EF: electrofusion) bonding in which the resin on the taper surface TL5 on the inner peripheral surface is melted by heating and systematically integrated. In addition, you may embed a heating wire in the inner peripheral surface and / or outer peripheral surface of the 1st division member 1301 and the 2nd division member 1302 previously.

(Relation of taper surface)
Subsequently, the relationship between the tapered surfaces described above will be described. FIG. 22 is an explanatory diagram showing the relationship between the angles of the tapered surfaces.

As shown in FIG. 22, the tapered surface TL1 and the tapered surface TL2 are provided at an angle θ1 with respect to the extending direction (longitudinal direction) of the tubular body 1200.
Further, the surface TL3 is formed by a surface in the same direction as the extending direction (longitudinal direction) of the tube body 1200. The tapered surface TL4 and the tapered surface TL5 are provided at an angle θ2 with reference to the extending direction (longitudinal direction) of the tubular body 1200.

As a result, as shown in FIG. 22, when the flanged tube 1100 is connected to another metal tube 1110 (see FIG. 27), the force F4 and the force F3 are applied in different directions. Instead of the structure in which the annular flange portion 1400 is held at one point of the dividing member 1300, the annular flange portion 1400 can be firmly held by using the entire sliding contact area AR.

In the present embodiment, the angle θ1 and the angle θ2 are different from each other. However, the present invention is not limited to this, and the angles may be the same or partially the same. Furthermore, the taper surface TL1 and the taper surface TL2 and the taper surface TL4 and the taper surface TL5 each have a certain angle.

(Piping joint)
FIG. 23 is a schematic plan view showing an example of the pipe joint 1500 according to the present embodiment, and FIG. 24 is a schematic side view of the pipe joint 1500 shown in FIG.

As shown in FIGS. 23 and 24, the pipe joint 1500 includes a flange plate 1540 between the tube portion 1520 and the tube portion 1530.
As shown in FIG. 23, the flange plate 1540 is provided with a plurality of holes 1550 that are radially centered on concentric circles. As will be described later, the hole 1550 is used to fix the pipe joint 1500 to either or both of the flanged tube 1100 and the metal tube 1110, or the axial centers of the flanged tube 1100 and the metal tube 1110, It has a positioning function for matching the axis of the pipe joint 1500.

Further, as shown in FIGS. 23 and 24, the cylindrical portion 1520 and the cylindrical portion 1530 are formed in a cylindrical shape. A concave portion 1521 is provided on the outer peripheral surface of the cylindrical portion 1520. A concave portion 1531 is provided on the outer peripheral surface of the cylindrical portion 1530. The concave portion 1521 is provided so as to be connected around the outer periphery of the cylindrical portion 1520. Further, the concave portion 1531 is provided so as to be connected around the outer periphery of the cylindrical portion 1530.

<Cross section of piping joint>
Next, FIG. 25 is a schematic cross-sectional view of the pipe joint 1500 shown in FIG. As shown in FIG. 25, the pipe joint 1500 has a cylindrical portion 1520, a flange plate 1540, and a hole 1525 that penetrates the cylindrical portion 1530. An inclined surface C is provided on the inner peripheral surface of the end portion of the hole 1525 on the cylindrical portion 1520 side.
Similarly, an inclined surface C is also provided on the inner peripheral surface of the end portion of the hole 1525 on the cylindrical portion 1530 side.

<O-ring installation>
Next, FIG. 26 is a schematic cross-sectional view showing a state where an O-ring 1580 that is a water leakage preventing member is attached to the recess 1521.

Here, when the nominal diameter of the flanged tube body 1100 or the metal tube body 1110 (see FIGS. 27 and 28) connected to the pipe joint 1500 in this embodiment is 75A (name A), the cylinder shown in FIG. The cylinder outer diameter L51 of the

portions

1520 and 1530 is 76.5 mm, and the groove diameter L52 is 68.5 mm. The outer diameter L53 of the flange plate 1540 is 185 mm.

When the nominal diameter is 75A (name A), the O-ring 1580 has an inner diameter of 64.6 mm and a cross-sectional diameter of 5.7 ± 0.15 mm (call number: P65, JIS B2401). As shown in the enlarged view of FIG. 26, the crushing margin (L12 / L13) of the O-ring 1580 is preferably in the range of 20% to 30%.
In the present embodiment, as a result of actual measurement, when the nominal diameter is 75A (name A), the crushing range of the O-ring 1580 is a range from 23.9% to 24.6%.

On the other hand, when the nominal diameter of the flanged tube body 1100 or the metal tube body 1110 (see FIGS. 27 and 28) connected to the pipe joint 1500 in the present embodiment is 200 A (name A), the cylindrical portion shown in FIG. The cylinder outer diameter L51 of 1520 and 1530 is 192 mm, and the groove diameter L52 is 181.5 mm. The outer diameter L53 of the flange plate 1540 is 412 mm.

In the present embodiment, when the nominal diameter of the flanged tube body 1100 or the metal tube body 1110 (see FIGS. 27 and 28) connected to the pipe joint 1500 in the present embodiment is 200 A (name A), an O-ring The size of 1580 is an inner diameter of 179.5 mm, and the cross-sectional diameter is 8.4 ± 0.15 mm (reference number: P180, JIS B2401). Further, even if the nominal diameter changes, as shown in the enlarged view of FIG. 26, the crushing margin (L12 / L13) of the O-ring 1580 is preferably in the range of 20% to 30%.
In the present embodiment, as a result of actual measurement, when the nominal diameter was 200 A (name A), the range of the crushing margin of the O-ring 1580 was a range from 21.7% to 27.0%.

<Attachment of flanged tube 1100 and metal tube 1110>
Next, FIG. 27 is a schematic diagram showing an example of attaching a pipe joint 1500 between the flanged tube 1100 and the metal tube 1110, and FIG. 28 is a diagram between the flanged tube 1100 and the metal tube 1110. It is a schematic diagram for demonstrating the effect at the time of attaching the piping coupling 1500.

<Tube joint structure 1900><When the entire pipe joint 1500 is made of metal>
For example, when the entire pipe joint 1500 is made of metal, the tubular portion 1530 of the pipe joint 1500 is inserted into the pipe body inside 1105 of the flanged pipe body 1100 as shown in FIG. In this case, by sandwiching the flange plate 1540 and the flange portion 1400 of the flanged tube body 1100 with an instrument such as a vise, the tube portion 1530 of the pipe joint 1500 can be easily attached to the tube interior 1105 of the flanged tube body 1100. Can be inserted.

In addition, since the manufacturing process is generally formed by extrusion molding in the flanged tube body 1100, the outer shape of the flanged tube body 1100 is formed with a specified value, but the inner diameter L100 of the flanged tube body 1100 is formed. Have a large variation with respect to the reference value. Even in this case, since the pipe joint 1500 is made of metal, the pipe joint 1500 can be easily inserted into the pipe body 1105 of the flanged pipe body 1100.

On the other hand, the tube portion 1520 of the pipe joint 1500 is inserted into the tube body inside 1115 of the metal tube body 1110. In this case, since the flange portion 1400 of the flanged tube body 1100 and the flange plate 1540 of the pipe joint 1500 are already integrated, the flange portion 1140 of the metal tube body 1110 and the flange plate 1540 are sandwiched by a tool such as a vise. By doing so, the pipe joint 1500 can be easily inserted into the pipe interior 1115 of the metal pipe 1110 and attached.

Subsequently, as shown in FIG. 27, the bolt B is connected to the through hole 1450 of the flange portion 1400 of the flanged tube body 1100, the hole 1550 of the flange plate 1540 (see FIG. 23), and the fixing hole of the flange portion 1140 of the metal tube body 1110. And is fixed with a nut N. In the present embodiment, fixing is performed with eight bolts B and nuts N.

As a result, as shown in FIG. 28, the pipe joint 1500 is accurately attached between the flanged pipe body 1100 and the metal pipe body 1110.
The metal described in the above embodiment includes, for example, bronze casting (BC6, BC6C), brass casting (YBsC3), modified brass drawn rod (extruded rod) (C3604BD (BE)), and brass for casting. Drawing rod (extrusion rod) (C3771BD (BE)), phosphorous deoxidized copper tube (C1220T), chromium plating on the base of copper alloy (BCrM), nickel plating on the base of copper alloy (BNM), mud cast iron (FC) , Ductile cast iron (FCD), malleable cast iron (FCMB), carbon tool steel (SK), stainless steel (18Cr-8Ni) (SUS304), stainless steel (18Cr-12Ni-MO) (SUS316), stainless steel (18Cr-12Ni-MO) Extremely low C) (SUS316L), aluminum alloy die casting (ADC), zinc alloy die casting (ZDC), etc. Laminate tube, it is possible to select the configuration and any material such as a composite tube. Furthermore, these metals may be subjected to rust prevention treatment such as plating or painting.

As shown in FIG. 28, for example, when the high-pressure fluid FL is caused to flow from the flanged tube 1100 to the metal tube 1110, the inclined surface C of the pipe joint 1500 is in a state of the high-pressure fluid FL passing through the pipe joint 1500. In a laminar flow state.

<Tube joint structure 1900><When

only pipe portions

1520 and 1530 of the pipe joint are made of resin>
FIG. 29 is a schematic diagram for explaining an effect when a pipe joint 1500 is attached between the flanged pipe body 1100 and the metal pipe body 1110.

Moreover, when the

cylinder parts

1520 and 1530 of the pipe joint 1500 are made of resin, the thickness of the

cylinder parts

1520 and 1530 is preferably in the range of 3 mm to 15 mm from the viewpoint of pressure resistance, and is in the range of 3 mm to 10 mm. More desirable. If the thickness is smaller than 3 mm, the strength and rigidity are insufficient, and the

cylindrical portions

1520 and 1530 may be destroyed. If the thickness is greater than 15 mm, the tube 1530 is inserted into the tube interior 1105 of the flanged tube 1100 or the tube portion 1520 is inserted into the tube interior 1115 of the metal tube 1110. There is a risk that the diameters of the

insides

1105 and 1115 of the body become remarkable, and the flow resistance of the high-pressure fluid FL increases to obstruct the flow.
Further, as shown in the enlarged view of FIG. 29, when the pressure of the high-pressure fluid FL in the

cylindrical portions

1520 and 1530 is high, the high-pressure fluid FL generates a force FS against the inclined surface C, and the pipe joint 1500 A force FV that pushes the hole 1525 in the outer circumferential direction is generated.

As a result, the O-ring 1580 is pressed against the tube interior 1105 of the flanged tube 1100 and the tube interior 1115 of the metal tube 1110 by the force FV. As a result, even when a high-pressure high-pressure fluid FL is flowed, it is possible to prevent water from leaking from the vicinity where the pipe joint 1500 is joined.

<Tube joint structure 1900><When pipe joint 1500 is resin>
When the entire pipe joint 1500 is made of resin, the thickness of the

cylindrical portions

1520 and 1530 is preferably in the range of 5 mm to 15 mm from the viewpoint of pressure resistance, and the thickness of the flange plate 1540 is from the pressure resistance surface. A range of 5 mm or more and 20 mm or less is desirable. If the thickness of the

cylindrical portions

1520 and 1530 is smaller than 5 mm, the strength and rigidity are insufficient, and the pipe joint 1500 made entirely of resin may be destroyed.

Further, if the thickness of the

tube portions

1520 and 1530 is larger than 15 mm, the tube portion 1520 is inserted into the tube interior 1105 of the tube body 1100 of the flanged tube body 1100 or into the tube body interior 1115 of the metal tube body 1110. In such a case, the diameters of the

tube interiors

1105 and 1115 are remarkably reduced, and the flow resistance of the high-pressure fluid FL is increased, which may hinder the flow.
Further, if the thickness of the flange plate 1540 is smaller than 5 mm, the strength and rigidity are insufficient, and the flange plate 1540 may be destroyed.
If the thickness of the flange plate 1540 is larger than 20 mm, the thickness of the resin is increased, and there is a possibility that a dimensional error is likely to occur due to shrinkage or the like.

In the present embodiment, the case where the flanged tube body 1100 and the metal tube body 1110 are straight pipes has been described. However, the present invention is not limited to this. For example, a curved pipe, socket, sleeve, cheese, reducer, and incrementer In addition, any other things such as a header and a cap may be used. Further, the flanged tube bodies 1100 may be joined to each other using the flanged tube body 1100 instead of the metal tube body 1110.

(Description of other connection states)
Next, another example in which the pipe joint 1500 is attached to the flanged pipe body 1100a and the metal pipe body 1110 is connected will be described. FIG. 30 is an explanatory view for explaining another example in which the pipe joint 1500 is attached to the flanged pipe body 1100a and the metal pipe body 1110 is connected.
Hereinafter, differences between the case where the pipe joint 1500 is connected to the flanged pipe body 1100a in FIG. 30 and the case where the pipe joint 1500 is connected to the flanged pipe body 1100 in FIG. 28 will be described.

As shown in FIG. 30, in the flanged tube body 1100 a, bolts Ba are embedded in the annular flange portion 1400 instead of the plurality of through holes in the flanged tube body 1100. The bolt Ba passes through the hole 1550 of the pipe joint 1500 and further passes through the through hole of the flange portion of the metal pipe body 1110 and is fastened using the nut N.

For example, when a large diameter portion 1210 is formed by laminating glass fibers on a tube body 1200 made of a JIS standard product and the standard of the annular flange portion 1400 is to be maintained, the flange portion of the annular flange portion 1400 becomes small. As a result, a washer or a washer for fixing with the bolt B may not be used.
However, since the bolt Ba is embedded in the annular flange portion 1400 in the flanged tube 1100a, it can be easily connected.

(Other examples)
FIG. 31 is a schematic diagram showing another example in which a plurality of flanged pipe bodies 1100 shown in FIG. 28 are used and a pipe joint 1500 is attached therebetween.

In another example, a flanged tube 1100 is used instead of the metal tube 1110. Others are the same as FIG.

FIG. 32 is a schematic diagram showing another example of the flanged tube 1100 shown in FIGS. 27 and 28.
As shown in FIG. 32, the flanged pipe body 1100b is provided with a guide portion so that the pipe joint 1500 can be easily inserted. In the guide portion, an inclined surface D is formed at the inner peripheral end of the flanged tube body 1100b so that the pipe joint 1500 can be easily inserted.

As a result, even if the inner diameter L100 varies due to extrusion, the inclined surface D is formed at the end portion of the inner peripheral surface of the flanged tube body 1100b, so that the pipe joint 1500 can be easily inserted. be able to.

In addition, although the inclined surface D was demonstrated by way of example as the guide portion, it is not limited to this, and any of an R shape, a curved surface, and other guide shapes may be used. Or you may provide in a part of inner peripheral edge part.

(Still other examples)
In the above-described embodiment, the case where the inner diameter L2 of the annular flange portion 1400 is provided larger than the outer diameter L1 of the large diameter portion 1210 of the tube body 1200 has been described. The case where the inner diameter L2 of 1400 is smaller than the outer diameter L1 of the large diameter portion 1210 of the tube body 1200 will be described.
That is, this is a case where the annular flange portion 1400 formed integrally from the large diameter portion 1210 side of the tube body 1200 cannot be inserted.

FIG. 33 is a schematic perspective view showing still another example of the annular flange portion.
As shown in FIG. 33, the annular flange portion 1400a includes

flange portions

1401 and 1402. The

flange portions

1401 and 1402 have a plurality of holes 1450. The

flange portions

1401 and 1402 have the same shape, and an annular flange portion 1400a is formed by abutting the flange portion 1401 and the flange portion 1402 together.

(Still other examples)
FIG. 34 is a schematic perspective view showing still another example of the annular flange portion.
As shown in FIG. 34, the annular flange portion 1400b includes

flange portions

1401b and 1402b. The

flange portions

1401b and 1402b have a plurality of holes 1450. The

flange portions

1401b and 1402b have the same shape.
In addition,

flange portions

1401b and 1402b are formed with flange-shaped

concave portions

1411 and 1422 and flange-shaped

convex portions

1412 and 1421 at the abutting positions of the

flange portions

1401 and 1402, respectively.
The flange-shaped concave portion 1411 of the flange portion 1401b is fitted into the flange-shaped convex portion 1421 of the flange portion 1402b, and the flange-shaped convex portion 1412 of the flange portion 1401b is fitted to the flange-shaped concave portion 1422 of the flange portion 1402b.
As a result, the annular flange portion 1400b can maintain the annular shape with the annular flange portion 1400b alone.
In addition, although the bowl-shaped recessed

parts

1411 and 1422 and the bowl-shaped

convex parts

1412 and 1421 have been described, the present invention is not limited to this, and any other bowl shape or any other shape may be used.

Subsequently, a case where the

annular flange portions

1400a and 1400b described in other examples are used will be described. Hereinafter, the annular flange portion 1400a of the

annular flange portions

1400a and 1400b will be described as an example.

35 and 36 are schematic diagrams for explaining the use of the annular flange portion 1400a.

When the annular flange portion 1400a is used as shown in FIGS. 35 and 36, the flange plate 1610 may be used so that the butts of the

flange portions

1401 and 1402 of the annular flange portion 1400a are not separated.
The flange plate 1610 is used side by side in the direction of the arrow FF with respect to the

flange portions

1401 and 1402. Accordingly, the bolt B is passed through the hole 1650 of the flange plate 1610 and the hole 1450 of the

flange portions

1401 and 1402, thereby preventing the butt separation of the

flange portions

1401 and 1402 of the annular flange portion 1400 a.

FIGS. 37 and 38 are schematic diagrams for explaining the use of the annular flange portion 1400a.
As shown in FIGS. 37 and 38, when the annular flange portion 1400a is used, a ring 1620 may be used so that the butts of the

flange portions

1401 and 1402 of the annular flange portion 1400a are not separated from each other.

The outer periphery of the annular flange portion 1400a can be held by attaching the ring 1620 to the outer periphery of the

flange portions

1401 and 1402 in the direction of the arrow FF. As a result, it is possible to prevent separation of the

flange portions

1401 and 1402 of the annular flange portion 1400a.

Further, FIGS. 39 and 40 are schematic diagrams for explaining the use of the annular flange portion 1400a.
As shown in FIGS. 39 and 40, when the annular flange portion 1400a is used, a flange 1630 with a ring may be used so that the butts of the

flange portions

1401 and 1402 of the annular flange portion 1400a are not separated from each other.
The flange with ring 1630 is a combination of the flange plate 1610 and the ring 1620.

By attaching the flange with ring 1630 to the

flange portions

1401 and 1402 in the direction of the arrow FF, the hole 1650 of the flange plate 1610 and the holes 1450 of the

flange portions

1401 and 1402 are retained while maintaining the outer periphery of the annular flange portion 1400a. By allowing the bolt B to pass through, the abutting separation of the

flange portions

1401 and 1402 of the annular flange portion 1400a can be reliably prevented.

In addition, although the case where the flange plate 1610 was newly used was demonstrated above, it is not limited to this, You may use the flange plate 1540 of the pipe joint 1500 instead of the flange plate 1610.

Furthermore, as shown in FIG. 41, instead of the flange with ring 1630, a pipe joint 1500a having the function of the flange with ring 1630 may be used by providing a ring 1590 at the end of the flange plate 1540 of the pipe joint 1500. .

In addition, you may use the annular flange part 1400b instead of the annular flange part 1400a demonstrated in FIGS. 35-41.

In this case, since the inner diameter L2 of the annular flange portion 1400 is smaller than the outer diameter L1 of the large diameter portion 1210 of the tubular body 1200, the

annular flange portions

1400a and 1400b cannot be inserted from the large diameter portion 1210 side of the tubular body 1200. By forming the

flange portions

1401 and 1402 of the

annular flange portions

1400a and 1400b, the

annular flange portions

1400a and 1400b can be easily mounted. As a result, it is not necessary to previously attach the

annular flange portions

1400a and 1400b to the tube body 1200, and the

annular flange portions

1400a and 1400b can be attached to the tube body 1200 later, so that work efficiency can be improved.

Further, since the flange plate 1610, the ring 1620, the flange 1630 with the ring, and the pipe joint 1500a for integrally holding the

annular flange portions

1400a and 1400b are provided, the

annular flange portions

1400a and 1400b can be reliably held.

As described above, according to the flanged

tubular bodies

1100, 1100a, and 1100b according to the present invention, the annular flange portion 1400 can be attached to the tubular body 1200 with a simple operation, and other metal tubular bodies 1110 or flanges can be easily attached. It can be connected to the attached

tubes

1100, 1100a, 1100b.

Also, when the taper angles TL1 and θ2 of the tapered surface TL2 and the tapered surface TL4 are different, the force applied to the annular flange portion 1400 can be dispersed. Furthermore, since the taper angle θ1 of the taper surface TL2 is smaller than the taper angle θ2 with the taper surface TL4, the force applied to the annular flange portion 1400 can be gradually dispersed.

Moreover, a high-pressure fluid can be circulated inside the pipe by the pipe joint structure 1900 in which the pipe joint 1500 is inserted into the pipe body 1100 with the flange. Moreover, since the annular flange portion 1400 of the flanged tubular body 1100 can be removed, the efficiency during conveyance can be increased.

In the present invention, flanged

tubular bodies

1100, 1100a, 1100b correspond to flanged tubular bodies,

annular flange portions

1400, 1400a, 1400b correspond to annular flange portions, tubular body 1200 corresponds to the tubular body, and diameter. The large portion 1210 corresponds to the first diameter shape, the flange plate 1540 corresponds to the flange portion, the first divided member 1301 and the second divided member 1302 correspond to the divided member, and the tapered surface TL2 becomes the first tapered surface. The bolts B and Ba correspond to the connecting jig, the tapered surface TL4 corresponds to the second tapered surface, the tapered surface TL5 corresponds to the third tapered surface, and the cylindrical portion 1520 corresponds to the first cylindrical portion. The cylinder 1530 corresponds to the second cylinder, the O-ring 1580 corresponds to the water leakage preventing member, and the

pipe joints

1500 and 1500a correspond to the pipe joint.

The preferred embodiments of the present invention are as described above, but the present invention is not limited to them. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

Claims

A pipe joint that connects one pipe through which a high-pressure fluid flows and another pipe,
A first tube portion that fits inside the pipe of the one pipe;
A second tube portion that communicates with the first tube portion and fits inside a pipe of the other tube;
A flange portion provided between the first tube portion and the second tube portion;
And a water leakage preventing member provided on the outer periphery of the cylindrical portion of the first cylindrical portion and the second cylindrical portion.
At least one of the first tube portion and the second tube portion has a tube portion outer peripheral recess,
The pipe joint according to claim 1, wherein the water leakage preventing member is attached to the outer circumferential concave portion of the cylindrical portion.
3. The pipe joint according to claim 1, wherein an outer diameter of the first tube portion and an outer diameter of the second tube portion are different from each other.
3. The pipe joint according to claim 1 or 2, wherein the outer diameter of the first cylinder portion and the outer diameter of the second cylinder portion are the same diameter.
The pipe joint according to any one of claims 1 to 4, wherein the pipe joint includes an inclined curved surface in which an inner diameter of the first cylinder part, an inner diameter of the second cylinder part, and the inner diameter communicating with each other are continuous.
The pipe joint according to any one of claims 1 to 5, wherein lengths in the communication direction of the first tube portion and the second tube portion are different.
The pipe joint according to any one of claims 1 to 6, wherein a tapered shape is formed on an inner periphery and an end of at least one of the first tube portion and the second tube portion.
The pipe joint according to any one of claims 1 to 7, wherein at least the flange portion is made of metal.
9. The pipe joint according to any one of claims 1 to 8, wherein at least one of the first cylinder part and the second cylinder part is made of resin.
The said flange part has a through-hole corresponding to the fixing hole formed in the flange part of said one piping, and the flange part of said other piping, The any one of Claim 1 to 9 characterized by the above-mentioned. Pipe fittings.
The flange portion is a hole with a tap groove formed corresponding to a fixing hole formed in the flange portion of the one pipe.
The pipe joint according to any one of claims 1 to 9, further comprising a tapped groove formed corresponding to a fixing hole formed in a flange portion of the other pipe.
The pipe joint according to any one of claims 1 to 11,
A pipe joint structure including the one pipe and another pipe,
At least one of the one pipe and the other pipe is
A tubular body having a first diameter shape that expands toward an end of the pipe;
A flange joint provided with a flange portion for connection to another pipe on the outer peripheral surface of the short pipe;
A pipe joint comprising: a semi-cylindrical core member inserted between an outer peripheral surface of the tubular body having the first diameter shape and an inner peripheral surface of the short pipe of the flange joint. Construction.
A first tube portion;
A second tube portion communicating with the first tube portion;
A flange portion provided between the first tube portion and the second tube portion;
A pipe joint that connects one pipe for circulating a high-pressure fluid and another pipe using a pipe joint including a water leakage preventing member provided on the outer circumference of the first and second cylinder parts. A leakage prevention method used,
A first step of inserting the first tube portion into the one pipe and compressing and deforming the water leakage preventing member on the inner surface of the pipe and the outer surface of the first tube portion to prevent water leakage;
A second step of preventing water leakage by inserting the second cylinder part into the other pipe and compressing and deforming the water leakage preventing member on the pipe inner surface of the other pipe and the outer surface of the second cylinder part; A method for preventing water leakage using a pipe joint, comprising:
A flanged tubular body locked to at least one end of the tubular body,
A tubular body having a first diameter shape expanding toward an end of the tubular body;
A split member that has an inner surface corresponding to the first diameter shape and a second diameter shape that expands toward an end of the tubular body, and divides the circumference;
An annular flange having an inner surface corresponding to the second diameter shape and connected to an opening of another tubular body.
The first diameter shape is a shape that gradually expands toward the end,
A first tapered surface corresponding to the first diameter shape is formed on the inner peripheral surface of the divided member,
The second diameter shape is a shape that gradually expands toward the end,
The flanged pipe body according to claim 14, wherein a second tapered surface corresponding to the second diameter shape is formed on an inner peripheral surface of the annular flange portion.
The flanged tubular body according to claim 15, wherein a taper angle based on an extending direction of the tubular body is different between the first tapered surface and the second tapered surface.
The flanged tubular body according to claim 15 or 16, wherein the first tapered surface has a smaller taper angle with respect to the extending direction of the tubular body than the second tapered surface.
18. The flanged tubular body according to any one of claims 14 to 17, wherein the annular flange portion is formed with a hole for connection to an opening of another tubular body.
A pipe joint structure that connects one pipe body through which a high-pressure fluid flows and another pipe body,
The flanged tubular body according to any one of claims 14 to 17, which forms at least one of the one tubular body and the other tubular body,
A pipe joint provided between the one pipe body and the other pipe body,
The pipe joint is
A first tubular portion fitted inside the tubular body of the one tubular body;
A second cylindrical portion that communicates with the first cylindrical portion and is fitted inside a tubular body of the other tubular body;
A flange portion provided between the first tube portion and the second tube portion;
A tubular joint structure comprising: a water leakage preventing member provided on an outer periphery of the cylindrical portion of the first cylindrical portion and the second cylindrical portion.