JP4480262B2 - Press fitting used for buried pipe removal method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention , in order to pull out the buried pipe and extract it from the ground , a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is prevented from slipping on the inner surface of the pipe by operation from the outside of the pipe. In order to pull out the buried pipe by pulling out the buried pipe from the ground by pulling the pressure fitting brought into pressure contact with the inner surface and pulling out the buried pipe from the ground In addition, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is pressed against the inner surface of the pipe in a non-slip state by operation from outside the pipe, over the entire length of the buried pipe in the removal range. The cable body is inserted into the buried pipe, the renewal pipe is connected to the upper side in the pulling direction, the pressure contact tool pressed against the inner surface of the pipe is pulled by the cable body, and the buried pipe is extracted from the ground. And, it is used for the buried pipe removal method that draws the renewed pipe into the extracted trace of the buried pipe On Seggu.
[0002]
[Prior art]
In the conventional buried pipe removal method, the front end of the buried pipe is pulled out and pulled out from the ground, or the wire inserted through the buried pipe is fixed to the rear end in the removed direction of the buried pipe and pulled out with that wire. The buried pipe is pulled out from the ground so as to push out from the rear end side.
[0003]
[Problems to be solved by the invention]
In order to extract the buried pipe from the ground, it is necessary to pull it with a pulling force exceeding the pulling resistance force due to earth pressure acting over the entire length of the buried pipe, but when pulling out the front end side of the buried pipe in the extraction direction, In the traction force, all of the resistance force that opposes the extraction resistance force due to earth pressure acts on the front end side in the extraction direction of the buried pipe as a tensile force, so that the tensile force is provided at the intermediate position of the buried pipe. If there is a possibility that only a part of the buried pipe can be pulled out due to disconnection or tearing off from the middle position, pull it out by pulling it out from the rear end side in the pulling direction with a wire inserted through the buried pipe. Of these, all of the counteracting force against the pulling out resistance force due to earth pressure acts as a compressive force on the rear end side in the extraction direction of the buried tube, so the buried tube is submerged in the ground by the compressive force. And bending deformation increases the pullout resistance, there may not Nukidase the buried pipe.
This invention is made | formed in view of the said situation, Comprising: It aims at providing the press fitting used for the buried pipe removal construction method which can extract the buried pipe of a desired range reliably by simple operation .
[0004]
[Means for Solving the Problems]
[0005]
[0006]
According to the first aspect of the present invention , in order to pull the buried pipe and extract it from the ground, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is removed from the outside of the pipe. It is a pressure contact tool used for the buried pipe removing method in which the buried pipe is pulled out of the ground by pulling the pressure weld tool pressed against the inner surface of the pipe in a non-slip state by operation and pulling the pressure contact tool pressed against the inner surface of the pipe. The position of the pressure contact parts of the pressure contact members adjacent to each other in the longitudinal direction of the cable body is determined by connecting the pressure contact members having pressure contact parts that can be pressure-contacted to a part of the inner surface of the pipe in the circumferential direction. By integrally fixing so as to be displaced in the circumferential direction of the strip, and tensioning the strip, each press contact member protrudes in the embedded pipe radial direction, and the press contact portion of each press contact member is connected to the inner surface of the tube by the press contact portion. In such a state that the pipe is stretched in the radial direction, the pipe inner surface is pressed against the pipe in a non-slip state. In the Aru point it is.
[Action]
Each press contact member, which is integrally fixed at multiple locations so that the positions of the press contact parts of the press contact members adjacent in the longitudinal direction of the cable body are shifted in the circumferential direction of the cable body, is inserted through the cable body into the embedded pipe and tensioned. Accordingly, the pressure contact portions of the pressure contact members can be pressed against the inner surface of the tube in a non-slip state in a state in which the inner surface of the tube is stretched in the radial direction by the pressure contact portions.
〔effect〕
The press contact portion can be pressed against the inner surface of the tube in a non-slip state by a simple operation of tensioning the cable body inserted in the buried tube.
According to a second aspect of the present invention, in order to pull out the buried pipe and extract it from the ground, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is removed from the outside of the pipe. The tube is pressed against the inner surface of the tube in a non-slip state, and the striated body is inserted into the buried tube over the entire length of the buried tube in the removal range. It is a pressure contact tool used in a buried pipe removal method for pulling the buried pressure pipe with the striated body, extracting the buried pipe from the ground, and pulling the renewed pipe into the extracted trace of the buried pipe,
A press-contact member provided with a press-contact portion that can be press-contacted to a part of the inner surface of the pipe inner surface at a plurality of locations of a flexible strip body is provided between press-contact portions of press-contact members adjacent to each other in the longitudinal direction of the strip body. The position of the pressure contact member is fixed so as to be displaced in the circumferential direction of the cable body, and the pressure contact member is protruded in the embedded pipe radial direction by tensioning the cable body. In the state where the inner surface of the tube is stretched in the radial direction, the inner surface of the tube is pressed against the inner surface of the tube in a non-slip state.
[Action]
Each press contact member, which is integrally fixed at multiple locations so that the positions of the press contact parts of the press contact members adjacent in the longitudinal direction of the cable body are shifted in the circumferential direction of the cable body, is inserted through the cable body into the embedded pipe and tensioned. Accordingly, the pressure contact portions of the pressure contact members can be pressed against the inner surface of the tube in a non-slip state in a state in which the inner surface of the tube is stretched in the radial direction by the pressure contact portions.
〔effect〕
The press contact portion can be pressed against the inner surface of the tube in a non-slip state by a simple operation of tensioning the cable body inserted in the buried tube.
[0007]
[0008]
According to the third aspect of the present invention , in order to pull the buried pipe and extract it from the ground, a pressure contact tool capable of being pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure contact tool is inserted from the outside of the pipe. A pressure contact tool for use in a buried pipe removing method for pulling out the buried pipe from the ground by pulling the pressure contact tool pressure-contacted to the inner surface of the pipe in a non-slip state by operation Is provided on the outer peripheral surface of the bag member that can be deformed to expand in the radial direction of the buried pipe, and is operated to expand the diameter of the bag member inserted into the buried pipe. The pressure contact portion is configured to be pressed against the inner surface of the pipe in a non-slip state.
[Action]
The bag member is inserted into the buried pipe in a reduced diameter deformed state, and the pressurized fluid is supplied to the inside of the bag member by operation from the outside of the pipe. The pressure contact portion provided on the surface can be pressed against the inner surface of the pipe in a non-slip state.
〔effect〕
With a simple operation of supplying a pressurized fluid to the inside of the bag member, the pressure contact portion can be pressed against the inner surface of the tube in a non-slip state.
According to a fourth aspect of the present invention, in order to pull the buried pipe and extract it from the ground, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is removed from the outside of the pipe. The tube is pressed against the inner surface of the tube in a non-slip state, and the striated body is inserted into the buried tube over the entire length of the buried tube in the removal range. It is a pressure contact tool used in a buried pipe removal method for pulling the buried pressure pipe with the striated body, extracting the buried pipe from the ground, and pulling the renewed pipe into the extracted trace of the buried pipe,
The bag member inserted in the buried pipe is provided with a pressure contact portion that can be pressed against the inner surface of the pipe on the outer peripheral surface of the bag member that can be expanded and deformed in the radial direction of the buried pipe by supplying pressurized fluid to the inside. The pressure contact portion is configured to be pressed against the inner surface of the pipe in a non-slip state by a radial deformation operation.
[Action]
The bag member is inserted into the buried pipe in a reduced diameter deformed state, and the pressurized fluid is supplied to the inside of the bag member by operation from the outside of the pipe. The pressure contact portion provided on the surface can be pressed against the inner surface of the pipe in a non-slip state.
〔effect〕
With a simple operation of supplying a pressurized fluid to the inside of the bag member, the pressure contact portion can be pressed against the inner surface of the tube in a non-slip state.
[0009]
According to a fifth aspect of the present invention, a locking portion that can be locked to the inner surface of the tube is provided in the pressure contact portion, and the locking portion is pressed against the inner surface of the tube, whereby the locking portion is moved to the inner surface of the tube. It is in the point comprised so that it may be made to latch.
[Action]
By bringing the pressure contact portion into pressure contact with the inner surface of the tube, the locking portion provided in the pressure contact portion can be locked with the inner surface of the tube.
〔effect〕
The locking portion can be locked to the inner surface of the tube, and the pressure contact portion can be reliably pressed against the inner surface of the tube in a non-slip state.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 and FIG. 2 show that the polyethylene resin water supply renewal pipe B is drawn into the extracted trace of the buried pipe A while pulling the polyethylene resin water pipe buried pipe A from the ground. The pipe removing method is shown, and FIG. 3 shows a pressure contact tool C used for the buried pipe removing method.
[0011]
Hereinafter, the buried pipe removing method will be described with reference to FIGS.
As shown in FIG. 1 (a), pits D1 and D2 are excavated at both ends of the removal range to expose both ends of the buried pipe A, and from the end of the buried pipe A exposed in one pit D2. The steel wire 2 is inserted into the buried pipe A as a flexible cable body with the pressure contact tool C provided over the entire length of the buried pipe A in the removal range. Then, the pressure contact tool C is inserted into the buried pipe A.
[0012]
As shown in FIG. 3, the pressure contact tool C includes a pressure contact portion 3 that can be pressure contacted to a part of the pipe inner surface 1 in the circumferential direction, and a metal or hard resin pressure contact member 4 having a diameter smaller than the tube inner diameter. The wire 2 is integrally fixed so that the positions of the pressure contact portions 3 of the pressure contact members 4 adjacent in the longitudinal direction of the wire are shifted by an angular difference of 180 ° in the circumferential direction of the wire 2 at a plurality of positions spaced apart by the wire 2. An eye bolt 9 having a ring 8 at both ends is connected to one end side of the lens, and a nut 10 is screwed onto the eye bolt 9.
[0013]
As shown in FIG. 4, each of the press contact members 4 forms a press contact surface 5 having a curvature substantially the same as that of the tube inner surface 1 on the outer peripheral portion thereof, and forms a through hole for inserting a wire. The wire 2 inserted into the through hole is integrally fixed by welding or the like, and the radius of curvature of the pressure contact surface 5 is such that the wire 2 can be tensioned to press the pressure contact surface 5 to the pipe inner surface 1. The wire 2 is inserted and fixed integrally at a position eccentric to the side away from the pressure contact surface 5 from the center X of R.
[0014]
The pressure contact surface 5 is provided with a locking portion 7 that can be locked to the tube inner surface 1. The locking portion 7 projects in a radially outward direction toward the lower side in the pulling direction of the pressure welding tool C. It is composed of a number of locking claws formed along the circumferential direction, and the locking claw 7 is caught on the pipe inner surface 1 when the press contact tool C is towed.
[0015]
Then, as shown in FIG. 1 (b) and FIG. 5, caps 12a and 12b having notches 11 into which the wires 2 and eyebolts 9 can be engaged from the radial direction are externally fitted to both ends of the buried pipe A. Then, the wire 2 is inserted into one cap 12a so that at least one pressure contact member 4 is located outside the cap 12a, and the eyebolt 9 and the nut 10 are located outside the cap 12b in the other cap 12b. Enlist in.
[0016]
Next, as shown in FIG. 1 (c), the eyebolt 9 side is pulled by an operation from the outside of the tube, and the wire 2 is concentric with the tube shaft core on one cap 12a by the pressure contact member 4 outside the buried tube A. 4 and tightening the nut 10 toward the other cap 12b to tension the wire 2, thereby causing the pressure contact members 4 in the buried pipe A to protrude in the radial direction of the buried pipe A, and FIG. As shown in FIG. 4, the press-contact portions 3 of the respective press-contact members 4 are brought into pressure contact with the tube inner surface 1 in a state where the tube inner surface 1 is stretched in the radial direction by the pressure contact portions 3, whereby the locking claws 7 are brought into contact with the tube inner surface 1. The pipe inner surface 1 is brought into pressure contact with the pipe inner surface 1 in a non-slip state to prevent slipping in the pulling direction.
[0017]
Next, as shown in FIG. 2 (d), the renewal pipe B is connected to the eye bolt 9 which is on the upper side in the pulling direction of the wire 2 via the connecting fitting 13, and as shown in FIG. The renewal pipe B is pulled into the extraction trace of the buried pipe A while pulling out the buried pipe A from the ground by pulling the pressure contact tool C brought into pressure contact with the wire 2.
[0018]
[Second Embodiment]
FIG. 6 shows another embodiment of the buried pipe removing method. Instead of the pressure contact tool C shown in the first embodiment, the pressure contact member 4 is formed in a columnar shape having a constant outer diameter, and the wire 2 is tensioned. In order to allow the pressure contact portion 3 to be pressed against the inner surface 1 of the pipe, a pressure contact tool C that is inserted and fixed at a position that is eccentric from the axial center of the pressure contact member 4 may be used.
Other configurations are the same as those of the first embodiment.
[0019]
[Third Embodiment]
FIG. 7 shows another embodiment of the buried pipe removing method. Instead of the press contact tool C shown in the first embodiment, the press contact member 4 is formed in an abacus shape having a larger diameter toward the center in the longitudinal direction. A press contact portion 3 having a locking portion 7 protruding in the circumferential direction toward the radially outer side is provided at the center in the direction so that the wire 2 can be tensioned so that the press contact portion 3 can be pressed against the inner surface 1 of the pipe. The press contact tool C may be used in which the wire 2 is inserted and fixed at a position eccentric from the axial center of the press contact member 4.
Other configurations are the same as those of the first embodiment.
[0020]
[Fourth Embodiment]
8 and 9 show another embodiment of the buried pipe removing method, and a plurality of frustoconical wedge members that are movable in the longitudinal direction of the buried pipe by the pulling operation of the wire 2 that is the cord body for pulling the pressure contact tool. 14 and a plurality of annular diameter-expanding members 15 each having a press-contact portion 3 that can be brought into pressure contact with the tube inner surface 1 by moving each wedge member 14 from the longitudinal direction of the embedded tube to the tube inner surface 1 side. The wire 2 is connected to each diameter expanding member 15 so that each wedge member 14 is concentrically fixed to the wire 2 at an interval, and the wedge member 14 is arranged on the upper side in the pulling direction of each diameter expanding member 15. You may use the press-contact tool C currently penetrated inside.
[0021]
As shown in FIG. 9, the diameter-expanding member 15 includes four movable members 16 each having a substantially fan shape in front view and having an outer peripheral portion with a pressure contact portion 3 having substantially the same curvature as the tube inner surface 1. 17, the inner peripheral side is formed in a fitting portion 18 into which the wedge member 14 is fitted, and the wedge member 14 is fitted into the fitting portion 18 by pulling operation of the wire 2. The movable member 16 is moved toward the radially outer side against the elastic force of the elastic member 17.
[0022]
Then, as shown in FIG. 8 (a), the wire 2 is connected to each diameter-expanding member 15 from the end of the buried pipe A exposed in one pit D2 over substantially the entire length of the buried pipe A in the removal range. At the same time, the wedge member 14 is inserted into the fitting portion 18 of the diameter-expanding member 15 as shown in FIG. While being pressed against the inner surface 1 of the pipe in a non-slip state, the buried pipe A is extracted from the ground.
[0023]
In this embodiment as well, as shown in the first embodiment, the renewal pipe B is connected to the upper side in the pulling direction of the wire 2 and the buried pipe A is pulled out from the ground while the buried pipe A is pulled out. The update pipe B may be drawn into the trace.
[0024]
[Fifth Embodiment]
Although not shown in the drawings, in the fourth embodiment, using the pressure contact tool C provided with the single wedge member 14 and the single diameter-expanding member 15, the diameter is expanded at the approximate center in the longitudinal direction of the buried pipe A in the removal range. The wire 2 is inserted into the buried pipe A so that the member 15 enters, the wedge member 14 is fitted into the fitting portion 18 of the diameter-expanding member 15 by the pulling operation of the wire 2, and the pressure contact part 3 is inserted into the buried pipe. While being pressed against the inner surface 1 of the pipe in the longitudinal center of A in a non-slip state, the buried pipe A may be extracted from the ground.
[0025]
[Sixth Embodiment]
FIG. 10 shows another embodiment of the pressure contact tool C, which is an example of a bag member that is an example of a bag member that can be expanded and deformed in the embedded tube radial direction by supplying pressurized air or pressurized water as a pressurized fluid to the inside. The outer peripheral surface 19 is configured as a pressure contact portion 3 that can be press-contacted to the tube inner surface 1, and a plurality of annular projections as locking portions 7 that can be locked to the tube inner surface 1 are formed at intervals on the pressure contact portion 3. The annular protrusions are locked to the pipe inner surface 1 by pressing the pressure contact portion 3 against the pipe inner surface 1.
[0026]
Then, as shown in FIG. 10 (a), the tube 19 whose diameter has been deformed is deformed from the end of the buried pipe A exposed in one pit D2 over substantially the entire length of the buried pipe A in the removal range. As shown in FIG. 10 (b), by inserting into the buried pipe A and supplying pressurized air or pressurized water to the inside through the hose 20 in which the wire 2 is buried in the pipe wall, the diameter is expanded from the outside of the pipe. The tube 19 is expanded and deformed, the pressure contact portion 3 is pressed against the inner surface 1 of the tube in a non-slip state, and the tube 19 is pulled by a hose 20 so that the buried tube A is extracted from the ground.
[0027]
[Other Embodiments]
1. In the buried pipe removing method according to the present invention, the buried pipe may be pulled directly from the ground by directly pulling the buried pipe in addition to the pressure contact tool brought into pressure contact with the inner surface of the pipe.
2. The buried pipe removing method according to the present invention may be used for extracting a buried pipe for sewerage or gas supply from the ground.
3. In the buried pipe removing method according to the present invention, the buried pipe is pulled from the ground by pulling the pressure contact tool that is in a non-slip state only on the inner surface of the limited range of the buried pipe inside the removed area. It may be extracted.
4). In the buried pipe removing method according to the present invention, an updated pipe having a diameter larger than that of the buried pipe may be drawn into the extracted trace of the buried pipe.
5). The buried pipe removing method according to the present invention may be used for extracting a metal buried pipe from the ground.
6). The buried pipe removed by the buried pipe removing method according to the present invention may be provided with a pipe joint at an intermediate position.
7). The press-connecting tool according to claim 3, which is used for the buried pipe removing method according to the present invention, the positions of the press-contact portions of some of the press-contact members among the press-contact members adjacent to each other in the longitudinal direction of the strip are in the ridge body circumferential direction. It may be fixed integrally so as to be displaced.
8). The press contact tool according to claim 4 used in the buried pipe removing method according to the present invention may be constructed so as to be pulled by a hard cable body such as a thick metal wire.
[Brief description of the drawings]
[Figure 1] Longitudinal sectional view explaining the buried pipe removing method [Figure 2] Longitudinal sectional view explaining the buried pipe removing method [Figure 3] Perspective view of the pressure fitting used in the buried pipe removing method [Figure 4] FIG. 5 is a perspective view of the main part. FIG. 6 is an explanatory diagram of a pressure contact tool used in the buried pipe removing method of the second embodiment. FIG. 7 is used in the buried pipe removing method of the third embodiment. Explanatory drawing of the pressure fitting [FIG. 8] Longitudinal sectional view explaining the buried pipe removing method of the fourth embodiment [FIG. 9] Explanatory drawing of the pressure fitting used in the buried pipe removing method of the fourth embodiment [FIG. 10] 6 is a longitudinal sectional view for explaining the buried pipe removing method of the sixth embodiment.
A buried pipe B renewal pipe C pressure welding tool 1 pipe inner surface 2 cable body 3 pressure welding part 4 pressure welding member 7 locking part 14 wedge member 15 diameter expanding member 19 bag member

Claims (5)

In order to pull the buried pipe out of the ground , a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is pressed against the inner surface of the pipe in a non-slip state by operation from the outside of the pipe. ,
The pressure contact tool used for the buried pipe removing method for pulling out the buried pipe from the ground by pulling the pressure contact tool pressed against the inner surface of the pipe ,
A press-contact member provided with a press-contact portion that can be press-contacted to a part of the inner surface of the pipe inner surface at a plurality of locations of a flexible strip body is provided between press-contact portions of press-contact members adjacent to each other in the longitudinal direction of the strip body. Fix it so that the position shifts in the circumferential direction of the striatum,
Tensioning the strips causes each pressure contact member to project in the embedded pipe radial direction, and presses the pressure contact portion of each pressure contact member to the tube inner surface in a state in which the pipe inner surface is stretched in the radial direction by the pressure contact portion. A pressing tool configured to be pressed in a non-slip state. In order to pull the buried pipe out of the ground, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is pressed against the inner surface of the pipe in a non-slip state by operation from the outside of the pipe. ,
The striated body is inserted into the buried pipe over the entire length of the buried pipe in the removal range, and the renewal pipe is connected to the upper side in the pulling direction,
Leading the pressure member which is pressed against the inner surface at the rope member, using the buried pipe withdrawn from the ground, and the withdrawal marks on pulling the update pipe write no embedded設管removal method of the buried pipe A press fitting that
A press-contact member provided with a press-contact portion that can be press-contacted to a part of the inner surface of the pipe inner surface at a plurality of locations of a flexible strip body is provided between press-contact portions of press-contact members adjacent to each other in the longitudinal direction of the strip body. Fix it so that the position shifts in the circumferential direction of the striatum,
Tensioning the strips causes each pressure contact member to project in the embedded pipe radial direction, and presses the pressure contact portion of each pressure contact member to the tube inner surface in a state in which the pipe inner surface is stretched in the radial direction by the pressure contact portion. A pressing tool configured to be pressed in a non-slip state. In order to pull the buried pipe out of the ground , a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is pressed against the inner surface of the pipe in a non-slip state by operation from the outside of the pipe. ,
The pressure contact tool used for the buried pipe removing method for pulling out the buried pipe from the ground by pulling the pressure contact tool pressed against the inner surface of the pipe ,
A pressure contact portion that can be pressed against the inner surface of the pipe is provided on the outer peripheral surface of the bag member that can be expanded and deformed in the radial direction of the embedded pipe by supplying pressurized fluid to the inside.
A pressure contact tool configured to press the pressure contact portion against the inner surface of the tube in a non-slip state by an operation of expanding the diameter of the bag member inserted into the buried tube. In order to pull the buried pipe out of the ground, a pressure fitting that can be pressed against the inner surface of the pipe is inserted into the buried pipe, and the pressure fitting is pressed against the inner surface of the pipe in a non-slip state by operation from the outside of the pipe. ,
The striated body is inserted into the buried pipe over the entire length of the buried pipe in the removal range, and the renewal pipe is connected to the upper side in the pulling direction,
Leading the pressure member which is pressed against the inner surface at the rope member, using the buried pipe withdrawn from the ground, and the withdrawal marks on pulling the update pipe write no embedded設管removal method of the buried pipe A press fitting that
A pressure contact portion that can be pressed against the inner surface of the pipe is provided on the outer peripheral surface of the bag member that can be expanded and deformed in the radial direction of the embedded pipe by supplying pressurized fluid to the inside.
A pressure contact tool configured to press the pressure contact portion against the inner surface of the tube in a non-slip state by an operation of expanding the diameter of the bag member inserted into the buried tube. Provided lockable locking portion to said contact portion on said inner surface, by pressing the contact portion on the inner surface, have configured the locking portion so as to engaged with the pipe surface according Item 5. The pressure connector according to any one of Items 1 to 4 .

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