WO2013047393A1

WO2013047393A1 - Fluid mixer

Info

Publication number: WO2013047393A1
Application number: PCT/JP2012/074294
Authority: WO
Inventors: 花田　敏広; 岡田　貴弘
Original assignee: 旭有機材工業株式会社
Priority date: 2011-09-27
Filing date: 2012-09-21
Publication date: 2013-04-04

Abstract

The present invention relates to a fluid mixer that has a housing having a first opening part and a second opening part and elements positioned within the housing. In the fluid mixer, the elements, which have mixing directivity and are formed in identical shapes, are disposed in a state facing each other on the axial line of the flow path within the housing.

Description

Fluid mixer

The present invention relates to a fluid mixer used for fluid transportation piping in various industries such as a chemical factory, a semiconductor manufacturing field, a food field, a medical field, and a bio field, and more particularly to a fluid mixer that has no mixing directivity and excellent workability. .

Conventionally, there is a fluid mixer as shown in FIG. 7 as a fluid mixer that is attached to a fluid transport pipe and uniformly mixes the fluid flowing in the pipe (for example, see Patent Document 1). The fluid mixer shown in FIG. 7 has a configuration in which elements 102 having joints 103 at both ends are arranged in a casing 101 and fixed by tightening a cap nut 104. An inlet channel 105 is provided inside the element 102, and a spiral groove 108 that forms a spiral channel 107 with the inner peripheral surface of the housing 101 is provided on the outer peripheral surface of the element 102. It is connected to the flow path 107. A plurality of communication holes 109 are provided on the bottom surface of the spiral groove 108, and the communication holes 109 serve as a branch channel 110 that communicates the main channel 106 with the spiral channel 107. Further, the main channel 106 is connected to the outlet channel 111.

Japanese Patent No. 46667539

However, the mixing direction of the conventional fluid mixer is determined by the shape of the element 102. If the fluid mixer is connected to the pipe with the wrong mixing direction, the original performance may not be achieved depending on the usage conditions. In that case, it is necessary to remove the fluid mixer from the piping line and connect it again to the piping line in the correct mixing direction, which may increase the construction time and affect the operation of the equipment. In particular, in the food field and the pharmaceutical field where pipe lines are frequently disassembled and cleaned, a fluid mixer having no mixing directivity is required in order to eliminate connection errors in the fluid mixer.

Also, depending on various conditions such as the fluid characteristics such as the viscosity and specific gravity of the mixed fluid and the required degree of mixing, it is necessary to increase the length of the element 102 or to complicate the shape. As the element 102 becomes longer and more complicated, the formation of deep holes such as the main channel 106, long grooves such as the spiral groove 108, and holes formed at predetermined positions in the circumferential direction such as the communication holes 109 are formed. May be difficult and may require a large and high-performance processing machine and molding machine. Further, in order to prevent problems such as misalignment and rough skin, the processing conditions and molding conditions are also more difficult, and these operations may be advanced.

An object of the present invention is to provide a fluid mixer having a configuration that can be easily formed without a mixing directivity direction even though an element having a mixing directivity is used.

According to the first aspect of the present invention, a fluid mixer having a casing having a first opening and a second opening, and an element located inside the casing, has mixing directivity and A fluid mixer is provided in which the elements formed in the same shape are arranged in a state of being opposed to each other on the flow path axis inside the casing.

That is, in the first aspect of the invention, the elements formed in the same shape are arranged in a state of being opposed to each other on the flow path axis inside the casing. It becomes possible to mix fluids without considering directivity, and therefore, it is possible to prevent a construction failure due to a wrong mixing directivity direction during pipe construction. In addition, since a plurality of elements are arranged in the casing, the length per element can be shortened compared to the case where only one element is provided in a fixed casing. Can be made easier.

In the present invention, the “mixing direction” means that when the fluid flows from one of the fluid mixers and when the fluid flows from the other, the mixing performance differs depending on the direction of flowing the fluid. In order to obtain excellent mixing performance, it refers to the direction in which the fluid flows through the fluid mixer, and the property in which the mixing performance varies depending on the direction in which the fluid flows is referred to as “mixing directivity”. For example, when the mixing direction of a fluid mixer is determined by an element, the element can be referred to as an “element with mixing direction”.

In the present invention, “same shape” means that two objects have the same or almost the same shape. For example, even if the first element is provided with a concave portion and the second element is provided with a convex portion in order to engage the element at each end face, the first element is provided if the mixing performance of the fluid mixer is substantially the same. The shape of the second element can be referred to as “the same shape”. In addition, if the element configuration includes a twisted shape or a spiral shape, if there is no difference in mixing performance between when the fluid is flowed from one of the fluid mixers and when the fluid is flowed from the other, the twisted shape or Even when the spiral turning directions are different from each other, the shapes of the first element and the second element can be referred to as “the same shape”.

According to the second aspect of the present invention, there is provided a fluid mixer in which the pair of elements arranged in the casing are arranged apart from each other.

That is, in the invention of claim 2, since the pair of elements are arranged apart from each other, when the fluid mixer is assembled, the assembly position of the element caused by the dimensional error of each part, the assembly error at the time of assembly, etc. Errors can be absorbed and assembly can be facilitated.

According to the invention described in claim 3, the element is formed with a spiral groove on the outer peripheral surface of the element in at least a part between the one end and the other end, and an opening is formed in the other end. A fluid mixer, wherein the main channel is formed substantially coaxially with the central axis of the spiral of the spiral groove, and a plurality of communication holes are respectively formed so as to communicate the spiral groove with the main channel. Provided.

That is, in the invention of claim 3, a fluid mixer having excellent mixing performance can be realized by forming the element defined by this claim.

According to a fourth aspect of the present invention, the plurality of spiral grooves having the same shape are provided on the outer peripheral surface of the element, and the spiral grooves are formed at regular intervals in the flow path axis direction. A fluid mixer is provided.

That is, in the invention of claim 4, a fluid mixer having excellent mixing performance can be realized by forming the fluid mixer defined by this claim.

According to the invention described in each claim, the following common effects can be obtained.
(1) Despite the use of an element having mixing directivity, the fluid mixer does not have mixing directivity, so that it is possible to prevent construction failure due to a mistake in the mixing directivity direction during pipe construction.
(2) Since the length of the element can be shortened, the molding process can be facilitated.

Hereinafter, the present invention will be more fully understood from the accompanying drawings and the description of preferred embodiments of the present invention.

It is a longitudinal cross-sectional view which shows the fluid mixer which concerns on 1st embodiment of this invention. It is a fragmentary longitudinal cross-sectional view of the fluid mixer which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view which shows the fluid mixer which concerns on 1st embodiment of this invention, Comprising: It is a figure for demonstrating the effect | action especially. It is a longitudinal cross-sectional view which shows the fluid mixer which concerns on 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the fluid mixer which concerns on 3rd embodiment of this invention. It is a perspective view which shows the element in 3rd embodiment of this invention. It is a longitudinal cross-sectional view which shows the conventional fluid mixer.

Hereinafter, although embodiments of the present invention will be described with reference to the drawings, it goes without saying that the present invention is not limited to the illustrated embodiments.

-First embodiment-
Hereinafter, a fluid mixer according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view showing a schematic configuration of a fluid mixer according to a first embodiment. In the first embodiment, elements 7 having mixed directivity and formed in the same shape are arranged in a casing 1 having openings at both ends in a state of facing each other on the flow path axis in the casing 1. Thus, a fluid mixer is formed.

The housing 1 has a first opening 23a and a second opening 23b, and includes a main body 2, a joint 3, a cap nut 4, a flange-type pipe joint 5, and a retaining ring 6. The main body 2 is made of PVC (polyvinyl chloride) and has a substantially cylindrical shape. The inner diameter of the main body 2 is slightly larger than the outer diameter of the outer peripheral surface of the element 7. The element 7 is inserted into the housing 1, and a spiral flow path 9 is formed from the inner peripheral surface of the main body 2 and the spiral groove 8 of the element 7. When the length of the main body 2 is increased, the main body 2 may be formed so as to be divided in order to facilitate the molding process and to facilitate cleaning of the inner peripheral surface.

In this embodiment, the element 7 is made of PTFE (polytetrafluoroethylene) and is formed in a substantially cylindrical shape. Since the first element 7a and the second element 7b have the same shape, the following description will be made mainly with the first element 7a as a representative. A spiral groove 8 is formed on the outer peripheral surface of the first element 7a so that the depth gradually decreases from one end surface toward the other end side. The spiral groove 8 has a groove extending to one end surface, and is formed so that the groove does not reach the other end surface. An opening 10 is formed on the other end surface of the first element 7a, and a cylindrical shape and a conical shape are combined toward the periphery of the end surface where the spiral groove 8 extends from the opening 10 (ie, the spiral end portion 11). The bottomed hole 12 having such a shape is formed, and the bottomed hole 12 serves as the main flow path 13 in the present embodiment. At this time, the first element 7a is formed so that the thickness between the bottom surface of the spiral groove 8 and the inner peripheral surface of the bottomed hole 12 is substantially equal, and at least a part of the first element 7a is an open end portion. The conical shape is reduced in diameter from 14 toward the spiral end 11. The groove width of the spiral groove 8 is formed so as to gradually increase from the opening end portion 14 provided with the opening 10 to the spiral end portion 11. On the bottom surface of the spiral groove 8, a communication hole 15 communicating with the main flow path 13 is opened substantially linearly in the radial direction at a predetermined position in the circumferential direction. A branch channel 16 that branches from the main channel 13 and connects to the spiral channel 9 is formed by these communication holes 15. In this embodiment, the swirling directions of the spiral grooves 8 of the first element 7a and the second element 7b are the same, but the mixing performance when the fluid is flowed from the first opening 23a side and the fluid from the second opening 23b side. As long as there is no difference in mixing performance when flowing, the turning directions of the spiral grooves 8 may be different from each other.

Hereinafter, the fluid mixer according to the first embodiment will be further described with reference to FIG.

An engaging portion 17 protruding in the outer diameter direction is provided at the opening end portion 14 of the first element 7a. The outer diameter of the engaging portion 17 is slightly smaller than the inner diameter of the first cap nut 4a, and is larger than the inner diameter of the first joint 3a. The engaging portion 17 determines the assembly position of the first element 7a by engaging with the end face of the first joint 3a. Further, when the fluid mixer is assembled, the first element 7a can be inserted into the first joint 3a from only one direction when the fluid mixer is assembled. It is possible to prevent the element 7a from being attached in the wrong direction.

An annular groove 19 is provided on the outer peripheral edge of the opening 10 of the first element 7a in which a water stop member 18 for maintaining the first element 7a and the first flange-type pipe joint 5a in a watertight state is mounted. In addition, a male screw portion 20 that is screwed into the female screw portion 27 of the first joint 3a is provided at a portion of the engaging portion 17 on the spiral end portion 11 side. By allowing the first element 7a and the first joint 3a to be integrally connected, it is possible to prevent the first element 7a from being accidentally dropped from the first joint 3a when the fluid mixer is disassembled. . Although the connection method of the 1st element 7a and the 1st coupling 3a is not specifically limited, As a suitable thing, the connection by screw connection or a bayonet structure is mentioned. An annular groove 22 in which a water stop member 21 for maintaining the first element 7a and the first joint 3a in a watertight state is mounted is provided in a portion of the male screw portion 20 on the spiral end portion 11 side. Further, if the engagement portion 17 is chamfered to provide a tool hook portion, the first element 7a can be easily connected to the first joint 24a.

For example, the joint 3 is made of PVC and has a substantially cylindrical shape. Since the first joint 3a and the second joint 3b have the same shape, the following description will be made mainly with the first joint 3a as a representative. The first joint 3a is formed so that the inner diameter is slightly larger than the outer diameter of the main body 2 and the inner diameter is slightly larger than the outer diameter of the outer peripheral surface of the first element 7a. It is comprised from the reduced diameter part 25 which is. A male threaded portion 26 into which the first cap nut 4a is screwed is formed on the outer peripheral surface of the first joint 3a on the reduced diameter portion 25 side, and the first element is formed on the inner peripheral surface of the end portion on the reduced diameter portion 25 side. A female screw portion 27 to which 7a is screwed is formed. The inner peripheral surface of the trunk portion 24 and the outer peripheral surface of the main body 2 are integrally connected by bonding, and the reduced diameter portion 25 and the first element 7 a are maintained in a watertight state by the water stop member 21. In order to reduce the number of parts, the main body 2 and the joint 3 may be formed integrally.

In the present embodiment, the cap nut 4 is made of PVC and is formed in a substantially cylindrical shape. Since the first cap nut 4a and the second cap nut 4b have the same shape, the following description will be made mainly with the first cap nut 4a as a representative. On the inner periphery of one end portion, there is provided a female screw portion 28 that is screwed into a male screw portion 26 provided on the outer periphery of the reduced diameter portion 25 of the first joint 3a. The other end portion is provided with an inner flange portion 29 protruding in the inner circumferential direction. The first cap nut 4a is screwed into the first joint 3a in a state where the inner flange portion 29 is in contact with the end surface of the flange portion 34 of the first retaining ring 6a, thereby fixing the first flange-type pipe joint 5a. .

As an example, the flange type pipe joint 5 is made of PVC. Since the first flange-type pipe joint 5a and the second flange-type pipe joint 5b have the same shape, the first flange-type pipe joint 5a will be mainly described below. The first flange-type pipe joint 5 a includes a short pipe part 30 and a flange part 31. The outer diameter of the short pipe portion 30 is formed smaller than the inner diameter of the inner flange portion 29 of the first cap nut 4a, and is formed to have the same diameter as or substantially the same diameter as the maximum diameter of the bottomed hole 12 of the first element 7a. ing. An annular groove portion 32 for fitting the first retaining ring 6 a is provided on the outer peripheral surface of the short tube portion 30.

In this embodiment, the retaining ring 6 is made of PVDF (polyvinylidene fluoride) and has a substantially cylindrical shape. Since the first retaining ring 6a and the second retaining ring 6b have the same shape, the first retaining ring 6a will be mainly described below. A fitting portion 33 that protrudes in the inner diameter direction and fits in the annular groove portion 32 of the first flange-type pipe joint 5a is formed on the inner peripheral side of the one end portion. On the outer peripheral surface of the other end portion, a flange portion 34 formed in a step difference from the fitting portion 33 is formed. The outer diameter of the flange 34 is formed larger than the inner diameter of the inner flange 29 of the first cap nut 4a. The first retaining ring 6a is provided with a notch that cuts off the circumference. When the first retaining ring 6a is attached, the first retaining ring 6a is attached to the annular groove 32 of the first flange-type pipe joint 5a after expanding its diameter like a C-shaped retaining ring.

Next, the operation of the fluid mixer according to the first embodiment of the present invention will be described with reference to FIG. 3 is the same view as FIG. 1, but is a drawing prepared for easier understanding of the operation of the fluid mixer according to the first embodiment.

When water and chemicals are mixed on the upstream side (left side in the drawing) of the fluid mixer and the chemicals are flown in a state where the concentration of the chemicals is temporarily high, the concentration is partially high in the piping. The flowing chemical liquid flows into the main flow path 13 from the first opening 23a. When the chemical liquid that flows in a partially concentrated state flows through the connection portion between the main flow path 13 and the branch flow path 16, a part of the chemical liquid flows through the branch flow path 16A and passes through the spiral flow path 9 to the downstream side (drawing). Then right). The remaining chemical liquid flows to the downstream side of the main flow path 13, and when the chemical liquid flows through the connection portion of the branch flow path 16B, a part of the chemical liquid flows through the branch flow path 16B and flows downstream through the spiral flow path 9. . Further, when the remaining chemical liquid flows downstream of the main flow path 13 and the chemical liquid flows through the connecting portions of the branch flow paths 16C and 16D, the branch flow paths 16C and 16D are the same as the chemical liquid flowing into the branch flow paths 16A and 16B. And flows downstream through the spiral flow path 9.

At this time, the chemical liquid flowing through the branch flow path 16D has the shortest flow path length from the first opening 23a to the gap 35 between the first element 7a and the second element 7b. Therefore, the chemical liquid flowing through the branch flow path 16D flows out from the first element 7a and flows into the gap 35 in a shorter time than the chemical liquid flowing through the branch flow paths 16A to 16C. Thereafter, the chemical solution that has passed through the branch flow paths in the order of the branch flow paths 16A, 16B, and 16C flows out of the first element 7a and flows into the gap 35 while causing a time difference in the order of the branch flow paths 16C, 16B, and 16A. To do. That is, the chemical solution that is partially concentrated in the pipe flows in approximately four times with a time lag by the first element 7a, and is mixed with the chemical solution that is not concentrated in concentration. The concentration distribution in the direction in which the fluid flows can be evenly and uniformly mixed.

In this embodiment, the gap 35 is provided between the first element 7a and the second element 7b. However, the gap 35 may or may not be provided. By providing the gap 35, it is possible to absorb an error in the assembly position of the element 7 caused by a dimensional error of each part or an assembly error during assembly when the fluid mixer is assembled, and the assembly can be facilitated. . Further, when the gap 35 is not provided, the space between the surfaces of the element 7 can be made as small as possible. This is particularly suitable when the fluid mixer is installed in a narrow space such as the inside of the apparatus.

* The chemical | medical solution which flowed into the clearance gap 35 flows into the spiral flow path 9 of the 2nd element 7b. The chemical liquid that has flowed into the spiral flow path 9 passes through the second element 7b in the reverse order to the first element 7a, and flows out of the fluid mixer through the second opening 23b. That is, when the chemical liquid that has flowed into the spiral flow path 9 of the second element 7b flows through the connecting portion of the branch flow path 16E, a part of the chemical liquid flows through the branch flow path 16E and flows downstream through the main flow path 13. . The remaining chemical liquid flows to the downstream side of the spiral flow path 9, and when flowing through the connecting portion of the branch flow path 16 F, a part of the chemical liquid flows through the branch flow path 16 F to the downstream side through the main flow path 13. Further, the remaining chemical liquid flows to the downstream side of the spiral flow path 9 and flows through the connecting portions of the branch flow paths 16G and 16H. As with the chemical liquid flowing into the branch flow paths 16E and 16F, And flows downstream through the main channel 13. Accordingly, the chemical solution that has flowed into the second element 7b flows in approximately four times with a time difference by the second element 7b, as in the case of passing through the first element 7a. The distribution can be made uniform and more uniform.

In the fluid mixer of the present invention, the element 7 itself has mixing directivity, but the element 7 is arranged in the casing in a state of being opposed on the flow path axis in the casing 1. In this manner, by disposing the element 7, the fluid can be mixed in the same way regardless of whether the fluid flows from either the first opening 23 a or the second opening 23 b. Therefore, when connecting a fluid mixer to piping, it is not necessary to pay attention to the mixing directivity direction, and it is possible to prevent a construction failure due to a mistake in the mixing directivity direction. This is particularly effective in the food field and the pharmaceutical field where the piping line is disassembled and cleaned on a daily basis.

In the fluid mixer according to the present invention, the pair of elements 7 having the same shape is arranged in the casing, so that the length of the element 7 is made longer than that in the case where the elements that match the length of the casing 1 are integrally formed. It can be shortened and the molding process can be facilitated. In general, even an element with a simple structure becomes difficult to form as the length of the element increases. In addition, if the element is provided with deep holes or complicated grooves, the molding process is particularly difficult, and problems such as misalignment and rough skin are likely to occur. In order to prevent such inconvenience, a dedicated tool and a large and high-performance molding machine and processing machine are required, but as in the present invention, when a pair of elements 7 having the same shape are arranged in the housing 1, Since the length of the element 7 can be shortened and the molding process is facilitated, the equipment can be reduced in size and simplified. In particular, when a fluid that is difficult to mix is highly mixed, the shape of the element 7 tends to be complicated and long, and in such a case, the effect is great.

In the fluid mixer of the present invention, since the length of the element 7 can be shortened, it becomes easy to clean the fluid mixer when disassembling and cleaning it. In particular, this has a great effect in the food field, the pharmaceutical field, and the like where the piping member is disassembled and cleaned on a daily basis.

In the present embodiment, the main flow path 13 is formed from a bottomed hole 12 having a shape that combines a cylindrical shape and a conical shape from the opening 10 of the first element 7 a toward the spiral end portion 11. The shape and the size of the inner diameter of 13 are not particularly limited, and may be appropriately designed in consideration of the viscosity and pressure of the fluid flowing through the main flow path 13.

In this embodiment, the groove width of the spiral groove 8 is formed so as to gradually increase from the opening 10 side toward the spiral end portion 11 side. The bottom surface of the spiral groove 8 is formed to be inclined toward the spiral end 11 side. The depth of the spiral groove 8 is formed so as to gradually increase from the opening 10 side toward the spiral end portion 11 side, but the groove width, bottom shape and depth of the spiral groove 8 are not particularly limited, What is necessary is just to design suitably considering the viscosity, pressure, etc. of the fluid which flows through the spiral flow path 9.

In the present embodiment, the communication hole 15 is linearly opened with the same diameter at a predetermined position in the circumferential direction from the bottom surface of the spiral groove 8, but the position, direction, and size of the communication hole 15 are particularly limited. Instead, it may be designed appropriately in consideration of the viscosity and pressure of the fluid flowing through the communication hole 15.

-Second embodiment-
Next, with reference to FIG. 4, the fluid mixer in 2nd embodiment of this invention is demonstrated. FIG. 4 is a longitudinal sectional view showing a fluid mixer according to the second embodiment. The difference between the second embodiment and the first embodiment is mainly the orientation of the elements. That is, the spiral ends 11 of the elements 41a and 41b are arranged on the openings 23a and 23b side of the housing 1. 1 to 3 are denoted by the same reference numerals, and differences from the first embodiment will be mainly described below.

In the present embodiment, the main body 36 is made of PVC and is formed in a substantially cylindrical shape. Since the first main body 36a and the second main body 36b have the same shape, the first main body 36a will be mainly described below. A female screw part 37 is provided on the inner periphery of one end of the first main body 36a, and a flange part 38 is provided on the outer periphery. A gasket 39 is sandwiched between the end faces of the flange portion 38, and the flange portion 38 is connected by a clamp 40. If the element 41 can be taken out from the housing | casing 1, the connection method of the main bodies 36 can use screwing, adhesion | attachment, bolting, a bayonet structure, etc., and is not specifically limited.

The inner diameter of the reduced diameter portion 25 of the first joint 3a is slightly larger than the outer diameter of the outer peripheral surface of the first element 41a. Further, a tapered portion 43 protruding in the inner diameter direction is formed at the end portion of the reduced diameter portion 25 on the opening portion 23 side, and a tapered surface 431 is formed on the inner side surface of the tapered portion 43.

The outer peripheral surface of the first element 41a is slightly smaller than the inner diameter of the inner peripheral surface of the main body 36a. The opening 10 of the element 41 is inserted so as to be disposed on the flange portion 38 side of the main body 36a. The first element 41a is connected by screwing the male screw portion 20 and the female screw portion 37 of the main body 36a.

In the fluid mixer of the present embodiment, the end surfaces on the opening 10 side of the first element 41a and the second element 41b are flat surfaces in this embodiment, but an annular recess is provided on one end surface and the other end surface is provided. An annular convex portion may be provided, and the annular concave portion may be engaged with the annular convex portion so that the flow path axes of the first element 41a and the second element 41b are made coincident. Further, if a tool hooking portion such as a hole or a notch is provided on the surface on the opening 10 side, the element 41 can be easily connected to the main body 36.

Other configurations of the main body 36 and the element 41 and the configurations of components other than the element 41 such as the flange-type pipe joint 5 are the same as those in the first embodiment, and thus description thereof is omitted.

Next, the operation of the fluid mixer according to the second embodiment of the present invention will be described with reference to FIG.

When water and chemicals are mixed on the upstream side (left side in the drawing) of the fluid mixer and the chemicals are flown in a state where the concentration of the chemicals is temporarily high, the concentration is partially high in the piping. The flowing chemical liquid flows into the spiral flow path 9 of the first element 41a from the first opening 23a. When the chemical liquid that flows in a partially concentrated state flows through the connection portion between the spiral flow path 9 and the branch flow path 42, a part of the chemical liquid flows through the branch flow path 42 A and passes through the main flow path 13 on the downstream side (drawing). Then right). Further, the remaining chemical liquid flows downstream of the spiral flow path 9, and when the chemical liquid flows through the connection portions of the branch flow paths 42 B to 42 D, the chemical liquid flows to the branch flow paths 42 B to 42 D Flows to the side.

The chemical solution flowing into the main channel 13 of the first element 41a flows into the main channel 13 of the second element 41b. The chemical liquid that has flowed into the main flow path 13 of the second element 41b passes through the second element 41b in the reverse order, and flows out of the fluid mixer through the second opening 23b. That is, when the chemical liquid that has flowed into the main flow path 13 of the second element 41b flows through the connection portions of the branch flow paths 42E to 42H, the chemical liquid flows to the branch flow paths 42E to 42H and passes through the spiral flow path 9 to the downstream side. Flowing. In this way, the chemical liquid that has flowed into the fluid mixer from the first opening 23a and temporarily concentrated has a time difference by passing through the element 41, and flows separately. The density distribution in the flowing direction can be made more uniform and mixed more uniformly.

-Third embodiment-
Next, a fluid mixer according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view showing a fluid mixer according to the third embodiment. The difference of the third embodiment from the first embodiment is mainly the structure of the element 44. That is, the element 44 is provided with a plurality of

spiral channels

47 and 48 that are displaced from each other in the circumferential direction. 1 to 3 are denoted by the same reference numerals, and differences from the first embodiment will be mainly described below.

In the fluid mixer of the present embodiment, the first spiral groove 45 and the second spiral groove 46 are formed on the outer peripheral surface of the first element 44a so that the depth gradually decreases from one end surface toward the other end side. . The first spiral groove 45 and the second spiral groove 46 have the same shape, and the first spiral groove 45 and the second spiral groove 46 have the same cross-sectional shape. As shown in FIG. 6, the first spiral groove 45 and the second spiral groove 46 are formed so as to be displaced from each other in the circumferential direction, that is, at a constant interval in the flow path axis direction. That is, in this case, the two spiral grooves draw a double spiral shape on the outer peripheral surface of the first element 44a. Further, the first spiral groove 45 and the second spiral groove 46 extend to one end surface, and are formed so as not to reach the other end surface. The first spiral groove 45 and the second spiral groove 46 form a first spiral channel 47 and a second spiral channel 48 together with the inner peripheral surface of the main body 2.

In the present embodiment, other configurations of the element 44 and configurations of parts other than the element 44 such as the main body 2 are the same as those in the first embodiment, and thus description thereof is omitted. Further, in the third embodiment, the effect of uniformizing the concentration distribution in the direction in which the fluid flows is the same as in the first embodiment, and thus the description thereof is omitted.

In the above fluid mixer, the

main body

2, 36, joint 3,

elements

7, 41, 44, cap nut 4, retaining ring 6, flange type pipe joint 5 are made of polyvinyl chloride, polypropylene, polyethylene if made of resin. Any of these may be used. In particular, when a corrosive fluid is used as the fluid, it is preferably a fluororesin such as polytetrafluoroethylene, polyvinylidene fluoride, or tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin. This is suitable because it can be used for fluids, and even if corrosive gas permeates, there is no risk of corrosion of piping members. A member or a part of the member forming the

main body

2 or 36 or the housing 1 may be formed of a transparent or translucent material. In this case, it is preferable because the state of fluid mixing can be visually confirmed. Moreover, the material of each component may be a metal or alloy such as iron, copper, copper alloy, brass, aluminum, stainless steel, titanium, etc., depending on the substance to be passed through the fluid mixer.

In the present invention, the main body 36, the joint 3, the

elements

7, 41, 44, the cap nut 4, the retaining ring 6, and the flange-type pipe joint 5 are each preferably formed of the same shape and a pair of parts. By configuring each component with the same shape and a pair of parts, the number of parts can be reduced, and not only the production and management of parts can be facilitated, but also these can be easily assembled.

In the above embodiment, as the

elements

7, 41, and 44, a plurality of branch channels that communicate with the main channel 13 and the

spiral channels

9, 47, and 48 that are formed substantially concentrically with the main channel 13. Although the

elements

7, 41 and 44 having 16 are listed, the shapes of the

elements

7, 41 and 44 are not particularly limited as long as they have mixed directivity. Further, a turbulent grid, a rectifying grid, a filter, or the like may be attached to the gap 33 between the

elements

7, 41, 44.

Although the present invention has been described in detail based on specific embodiments, those skilled in the art can make various changes and modifications without departing from the scope and spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Main body 3a 1st coupling 3b 2nd coupling 4a 1st cap nut 4b 2nd cap nut 5a 1st flange type pipe fitting 5b 2nd flange type pipe coupling 6a 1st retaining ring 6b 2nd retaining ring 7a 1st Element 7b Second element 8 Spiral groove 9 Spiral flow path 10 Opening 11 Spiral end part 12 Bottomed hole 13 Main flow path 14 Opening end part 15 Communication hole 16 Branching flow path 17 Engagement part 18 Water stop member 19 Annular groove 20 Male screw Part 21 Water stop member 22 Annular groove 23a First opening part 23b Second opening part 24 Body part 25 Reduced diameter part 26 Male thread part 27 Female thread part 28 Female thread part 29 Inner flange part 30 Short pipe part 31 Flange part 32 Annular part Groove portion 33 Fitting portion 34 Gutter portion 35 Gap 36a First body 36b Second body 37 Female thread portion 38 Flange portion 39 Gasket 40 clamps 41a first element 41b second element 42 the branch flow path 43 tapered portion 431 tapered surface 44a first element 44b second element 45 first helical grooves 46 the second helical groove 47 first spiral flow path 48 second spiral flow path

Claims

In a fluid mixer having a housing having a first opening and a second opening, and an element located inside the housing,
The elements having mixed directivity and formed in the same shape are arranged in a state of facing each other on the flow path axis inside the housing,
Fluid mixer.
A pair of the elements arranged in the housing are arranged apart from each other;
The fluid mixer according to claim 1.
In the element, a spiral groove is formed on the outer peripheral surface of the element in at least a part between the one end and the other end,
An opening is formed in the other end,
The main flow path is formed substantially coaxially with the spiral central axis of the spiral groove;
A plurality of communication holes are each formed to communicate the spiral groove with the main flow path,
The fluid mixer according to claim 1 or 2.
A plurality of the spiral grooves having the same shape are provided on the outer peripheral surface of the element,
Each spiral groove is formed at a certain interval in the flow path axis direction.
The fluid mixer according to claim 3.