Valve device and valve body

Abstract

To provide a valve device which can easily cope with a change or the like of a specification of piping while suppressing costs.SOLUTION: A valve device 1 includes: a valve main body part 2 having a male socket 22 comprising a plurality of holes, and a valve body having a communication path, and rotating in the male socket; a joint main body part 3 comprising a plurality of piping parts, and having a female socket 31 which can be engaged with or disengaged from the male socket; and a connecting mechanism for connecting the valve main body part and the joint main body part in a state that the male socket and the female socket are engaged with each other. At least two of the piping parts of the male socket communicate with each other via the communication path of the valve body and the holes of the male socket according to a rotation position of the valve body.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a valve device and valve body and is concerned with.

Background Art

[0002] For example, a flow path switching valve is known as a valve device that is assembled in the middle of a fluid piping system and performs switching and opening / closing control of a fluid flow path. Patent Document 1 discloses a valve body having a communication path, a valve chamber in which the valve body is rotatably accommodated, and a valve main body having an inlet flow path and a plurality of outlet flow paths communicating with the valve chamber, and a flow path switching valve that communicates the inlet flow path with any one of the plurality of outlet flow paths through the communication path by the rotational operation of the valve body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, depending on the piping specifications, the positions of the inlet and outlet flow paths provided in the valve main body may change. When the positions of the inlet and outlet flow paths change, the same flow path switching valve cannot be used, so conventionally, the flow path switching valve has been newly redesigned, resulting in an increase in cost.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a valve device that can easily cope with changes in piping specifications while suppressing costs. and valve body and is to provide.

Means for Solving the Problems

[0006] The valve device of the present invention is A male socket having multiple holes, and a communication passage within the male socket Around the axis of rotation A valve body having a rotating valve element, A fitting body having multiple piping sections and a female socket that can engage with or disengage from the male socket, The system includes a connecting mechanism that connects the valve body and the joint body while the male socket and the female socket are engaged, Depending on the rotational position of the valve body, at least two of the piping sections of the joint body are connected via the communication passage of the valve body and the hole in the male socket. The aforementioned male socket is Surrounding the aforementioned axis of rotation Integrated Four inner walls It has, The rotation of the inner wall Around the outer circumference of the axis Male side Having a plane around the hole, The aforementioned female socket is The rotation Inner circumference around the axis female side The plane has a surface around the opening of the piping section, The O-ring fitted around the hole of the male socket is the female socket The female side It contacts the plane all around, and the hole of the male socket and the piping portion of the female socket are in communication. The male socket The inner surface of the inner wall around the rotation axis The seat portion, positioned between the valve body and the valve body, has an inner hole connected to the hole of the male socket, and the seat portion and the valve body come into contact with each other, thereby sealing the area around the connection between the communication passage of the valve body and the inner hole. The inner circumferential surface and the male side plane are arranged to overlap along a direction perpendicular to the axis of rotation, The male socket The inner circumferential surface The male socket is engaged with the female socket with the seat portion and the valve body positioned inside the female socket. The valve body of the present invention is A valve body that can constitute a valve device by being connected via a connecting mechanism to a joint body having multiple piping sections and a female socket, A male socket that can engage with or disengage from the female socket of the joint body, Multiple holes provided in the male socket, Within the male socket Around the axis of rotationIt has a valve body that is rotatable and has a communication passage. In the engaged state where the male socket and the female socket are engaged, the connecting mechanism prevents the separation of the joint main body portion and the valve main body portion. In the engaged state, at least two of the piping portions communicate with each other through the communication passage of the valve body and the holes of the male socket according to the rotational position of the valve body. The male socket Surrounding the aforementioned axis of rotation is integrated Four inner walls with Yes and has a plane around the hole on the outer periphery around its axis. The rotation of the inner wall around its axis Male side and has a plane around the hole. The female socket The rotation has a plane around the opening of the piping portion on its inner periphery around its axis. female side around its axis The O-ring mounted around the hole of the male socket abuts against the entire circumference of the plane of the female socket, and the hole of the male socket and the piping portion of the female socket communicate with each other. The O-ring mounted around the hole of the male socket abuts against the entire circumference of the plane of the female socket, and the hole of the male socket and the piping portion of the female socket communicate with each other. The female side The O-ring mounted around the hole of the male socket abuts against the entire circumference of the plane of the female socket, and the hole of the male socket and the piping portion of the female socket communicate with each other. The sheet portion disposed between the The inner surface of the inner wall around the rotation axis of the male socket and the valve body has an inner hole connected to the hole of the male socket. When the valve body and the sheet portion abut against each other, the connection portion around the communication passage of the valve body and the inner hole is sealed. The inner circumferential surface and the male side plane are arranged to overlap along a direction perpendicular to the axis of rotation, The male socket The inner circumferential surface is engaged with the female socket in a state where the sheet portion and the valve body are disposed inside the

Advantages of the Invention

[0007] [[ID=4I]] and valve body According to the present invention, it is possible to provide a valve device that can easily cope with changes in piping specifications while suppressing costs. and valve body while suppressing costs and can easily cope with changes in piping specifications.

Brief Description of the Drawings

[0008] [Figure 1] FIG. 1 is a perspective view of a valve device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the valve device. [Figure 3] FIG. 3 is a side view of the valve device cut along the line A-A of FIG. 1. [Figure 4] FIG. 4 is a perspective view of the valve device showing the valve body part and the joint body part separated from each other. [Figure 5] FIG. 5 is a perspective view of the valve device showing the valve body part and another joint body part separated from each other. [Figure 6] FIG. 6 is a perspective view of the valve device showing the valve body part and the joint body part according to the second embodiment separated from each other. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the valve device according to the present invention will be described with reference to the drawings.

[0010] [First Embodiment] FIG. 1 is a perspective view of a valve device 1 according to a first embodiment of the present invention. FIG. 2 is a front view of the valve device 1. FIG. 3 is a side view of the valve device 1 cut along the line A-A of FIG. 1. FIG. 4 is a perspective view of the valve device 1 showing the valve body part 2 and the joint body part 3 separated from each other.

[0011] The valve device 1 mainly includes a valve body part 2 and a joint body part 3. Here, the description will be made with the valve body part 2 side being the upper side and the joint body part 3 side being the lower side.

[0012] The valve body part 2 has a motor part 21 with an output shaft 21a protruding downward, a male socket 22 extending from the motor part 21 so as to surround the output shaft 21a, seat parts 23H and 23J arranged inside the male socket 22, and a valve body 24 joined to the tip of the output shaft 21a. Let the rotation axis of the output shaft 21a be L.

[0013] The male socket 22 has a first inner wall 22a, a second inner wall 22b, a third inner wall 22c, a fourth inner wall (opposite the second inner wall 22b and not shown), and a square-shaped bottom wall 22e connected to the lower ends of these side walls. A flange-like portion 22f is connected to the inner surfaces of the first inner wall 22a, the second inner wall 22b, the third inner wall 22c, and the fourth inner wall (not shown), and extends toward the output shaft 21a. A hollow cylindrical portion 22g is connected to the center of the flange-like portion 22f. The upper ends of the first inner wall 22a, the second inner wall 22b, the third inner wall 22c, the fourth inner wall (not shown), and the hollow cylindrical portion 22g are fixed to the motor portion 21. The male socket 22 is formed by separately molding, for example, an upper part and a lower part, inserting the seat portions 23H and 23J and the valve body 24 between them, and then welding them together with a joining line BL. The inside of the male socket 22 constitutes the valve chamber VC.

[0014] The output shaft 21a passes through the hollow cylindrical portion 22g and protrudes downward from its lower end. The output shaft 21a and the hollow cylindrical portion 22g are fitted together so as to be rotatable relative to each other, and an O-ring OR1 is disposed between them.

[0015] The first inner wall 22a has a first intermediate hole 22h, the second inner wall 22b has a second intermediate hole 22i (Figure 4), and the third inner wall 22c has a third intermediate hole 22j, but the fourth inner wall (not shown) does not have a hole. Seal grooves 22p are formed in the first inner wall 22a around the first intermediate hole 22h, the second inner wall 22b around the second intermediate hole 22i, and the third inner wall 22c around the third intermediate hole 22j, and an O-ring OR2 is placed in each seal groove 22p.

[0016] A first wedge portion 22k is formed on the outer surface near the center of the upper end of the first inner wall 22a, decreasing in size as the distance from the first inner wall 22a decreases downwards. A second wedge portion 22m (Figure 4) is formed on the outer surface near the center of the upper end of the second inner wall 22b, decreasing in size as the distance from the second inner wall 22b decreases downwards. A third wedge portion 22n is formed on the outer surface near the center of the upper end of the third inner wall 22c, decreasing in size as the distance from the third inner wall 22c decreases downwards. Similarly, a fourth wedge portion (not shown) is formed on the outer surface near the center of the upper end of the fourth inner wall, decreasing in size as the distance from the fourth inner wall decreases downwards. The shape of each wedge portion and the installation height from the lower end of the male socket 22 are common to all.

[0017] An annular seat portion 23H is positioned inside the first inner wall 22a of the male socket 22, and an annular seat portion 23J is positioned inside the third inner wall 22c. The seat portion 23H facing the first inner wall 22a has a first inner hole 23h facing the first intermediate hole 22h, and the seat portion 23J facing the third inner wall 22c has a third inner hole 23j facing the third intermediate hole 22j. No seat portions are positioned inside the second inner wall 22b and the fourth inner wall.

[0018] A seal groove 23a is formed on the outer surface surrounding the first inner bore 23h and the third inner bore 23j, and an O-ring OR4 is placed inside each seal groove 23a.

[0019] Spherical seats 23c are formed on the inner circumference of the inner ends of the first inner hole 23h and the third inner hole 23j, respectively, so as to be connected to each inner hole.

[0020] The valve body 24, positioned between the seat portions 23H and 23J, has a substantially spherical shape, with its outer circumferential surface forming a spherical portion 24c. By ensuring that the spherical portion 24c abuts against the entire circumference of the spherical seat 23c, the valve body 24 can rotate around the axis L together with the output shaft 21a while maintaining a seal between them. Alternatively, the spherical seat 23c and the spherical portion 24c may be a conical seat and a conical portion that abut each other.

[0021] The valve body 24 has two openings 24a and 24b at vertical positions opposite the first inner bore 23h and the third inner bore 23j, with a 90-degree phase difference around the axis L. The openings 24a and 24b do not penetrate the valve body 24, but their inner ends communicate with each other inside the valve body 24, forming a communication passage.

[0022] The joint body 3 is made of resin and has a female socket 31 formed from a first outer wall 3a, a second outer wall 3b, a third outer wall 3c, a fourth outer wall 3d, and a square-shaped bottom wall 3e connected to the lower ends of these side walls. The bottom wall 3e has a larger outer dimension than the bottom wall 22e of the male socket 22.

[0023] A first piping section 3h is formed on the first outer wall 3a, facing the first intermediate hole 22h; a second piping section 3i is formed on the side facing the second outer wall 3b, facing the second intermediate hole 22i; and a third piping section 3j is formed on the side facing the third outer wall 3c, facing the third intermediate hole 22j. No piping section is formed on the fourth outer wall 3d. The axes O of the first piping section 3h and the third piping section 3j are common and perpendicular to axis L, and the axis X of the second piping section 3i is perpendicular to both axis L and axis O. Each piping section is connected to piping not shown.

[0024] A first rectangular frame 3k is connected to the center of the upper end of the first outer wall 3a, a second rectangular frame 3m is connected to the center of the upper end of the second outer wall 3b, a third rectangular frame 3n is connected to the center of the upper end of the third outer wall 3c, and a fourth rectangular frame 3q is formed at the center of the upper end of the fourth outer wall 3d. The shape of each rectangular frame is common, and the inner opening of each rectangular frame can accommodate a wedge. Furthermore, if an inclined surface TP (Figure 3) corresponding to the wedge is provided on the inner surface of the upper end of the rectangular frame, assembly can be made smoother. The first wedge 22k, second wedge 22m, third wedge 22n, and fourth wedge, along with the first rectangular frame 3k, second rectangular frame 3m, third rectangular frame 3n, and fourth rectangular frame 3q, constitute the connecting mechanism.

[0025] (Assembly of the valve body and the joint body) The valve body 2 and the joint body 3 are manufactured independently. When assembling the valve body 2 and the joint body 3, as shown in Figure 4, the valve body 2 is positioned above the joint body 3, and the two are brought relatively close together. At the same time, the male socket 22 of the valve body 2 enters and engages with the female socket 31 of the joint body 3, and the first rectangular frame 3k, second rectangular frame 3m, third rectangular frame 3n, and fourth rectangular frame 3q approach the first wedge portion 22k, second wedge portion 22m, third wedge portion 22n, and fourth wedge portion.

[0026] As the valve body 2 and the joint body 3 move relative to each other, the rectangular frame (also called the frame portion) elastically deforms by riding on the wedge portion, and the elastic deformation returns to its original state when it has moved over the wedge portion. As a result, the wedge portion is positioned within the rectangular frame, that is, the rectangular frame is locked in place by the upper surface of the wedge portion, so that the valve body 2 and the joint body 3 are held in place and their separation is prevented.

[0027] In this configuration, the first outer wall 3a, second outer wall 3b, third outer wall 3c, and fourth outer wall 3d of the joint body 3 are opposite to the first inner wall 22a, second inner wall 22b, third inner wall 22c, and fourth inner wall (not shown) of the male socket 22, and the lower surface of the bottom wall 22e is in contact with the upper surface of the bottom wall 3e.

[0028] At this time, the first intermediate hole 22h and the first inner hole 23h are in communication with the first piping section 3h. The second piping section 3i is in communication with the valve chamber VC via the second intermediate hole 22i. The third intermediate hole 22j and the third inner hole 23j are in communication with the third piping section 3j.

[0029] (Operation of the valve device) In the state shown in Figure 3, the opening 24a of the valve body 24 faces the first inner hole 23h, and the opening 24b communicates with the valve chamber VC, but the third inner hole 23j is closed by the outer surface of the valve body 24. In this state, the first piping section 3h and the second piping section 3i communicate with each other via the first intermediate hole 22h and the first inner hole 23h, the communication passage in the valve body 24, the valve chamber VC and the second intermediate hole 22i, but the third piping section 3j is closed.

[0030] In contrast, when power is supplied to the motor unit 21, the output shaft 21a is rotated by 90 degrees, causing the opening 24a of the valve body 24 to communicate with the valve chamber VC, and the opening 24b to face the third inner hole 23j, while the first inner hole 23h is closed by the outer surface of the valve body 24. In this state, the second piping section 3i and the third piping section 3j communicate via the second intermediate hole 22i, the valve chamber VC, the communication passage within the valve body 24, and the third intermediate hole 22j and the third inner hole 23j, but the first piping section 3h remains closed.

[0031] Thus, according to the valve device 1 of this embodiment, by rotating the output shaft 21a by supplying power to the motor unit 21, the fluid flow can be switched between the first piping section 3h and the second piping section 3i, or between the second piping section 3i and the third piping section 3j.

[0032] (Assembly of the valve body and a separate fitting body) Figure 5 is a perspective view of the valve device 1A, showing the valve body 2 and a separate fitting body 3A separated. The valve body 2 is the same as that shown in Figures 1 to 4. The fitting body 3A also has a female socket 31A consisting of a first outer wall 3Aa, a second outer wall 3Ab, a third outer wall 3Ac, a fourth outer wall 3Ad, and a square-shaped bottom wall 3Ae connected to the lower ends of these side walls, similar to those shown in Figures 1 to 4.

[0033] A first rectangular frame 3Ak is connected to the center of the upper end of the first outer wall 3Aa, a second rectangular frame 3Am is connected to the center of the upper end of the second outer wall 3Ab, a third rectangular frame 3An is connected to the center of the upper end of the third outer wall 3Ac, and a fourth rectangular frame 3Aq is formed at the center of the upper end of the fourth outer wall 3Ad.

[0034] Furthermore, a first piping section 3Ah is formed on the first outer wall 3Aa, and a third piping section 3Aj is formed on the third outer wall 3Ac, but no piping section is formed on the second outer wall 3Ab. However, a bottom piping section 3Af is formed on the bottom wall 3Ae.

[0035] Furthermore, when using the joint body 3A, it is preferable to use a valve body (not shown) with openings in the side wall and bottom wall that communicate with each other at their inner ends.

[0036] When assembling the valve body 2 and the joint body 3A, the rectangular frames 3Ak to 3Aq elastically deform as they move relative to each other, riding onto the wedge portions 22k to 22n, and the elastic deformation returns to normal once they have moved over the wedge portions. As a result, the wedge portions are positioned within the rectangular frames, and the rectangular frames are locked in place by the upper surfaces of the wedge portions, so that the valve body 2 and the joint body 3A are held in place and their separation is prevented. The valve body 2 and the joint body 3A can be engaged and disengaged by releasing the rectangular frames 3Ak to 3Aq from the wedge portions 22k to 22n.

[0037] When using the joint body 3A, the output shaft 21a can be rotated by supplying power to the motor unit 21, thereby switching the fluid flow between the first piping section 3Ah and the bottom piping section 3Af, or between the third piping section 3Aj and the bottom piping section 3Af.

[0038] In this way, by standardizing the connection between the valve body 2 and the joint bodies 3 and 3A, the valve body 2 can be used as a common component, and by simply replacing the joint bodies 3 and 3A, it is possible to apply the valve to various piping specifications, thereby reducing the cost of the valve devices 1 and 1A.

[0039] In the above embodiment, even if the valve body 2 and the joint bodies 3, 3A are rotated relative to each other by a 90-degree phase around the axis L, the positional relationship between the rectangular frame and the wedge portion remains unchanged, thus enabling installation. The joint body is not limited to the above shape.

[0040] [Second Embodiment] Figure 6 is a perspective view of the valve device 1B in which the valve body 2B and the coupling body 3B according to the second embodiment are separated. In this embodiment, the configuration is the same as in the embodiment described above, except for the connecting mechanism that connects the valve body 2B and the coupling body 3B, so a redundant explanation is omitted.

[0041] In this embodiment, a pair of through holes 22Bs are formed parallel to each other, penetrating the bottom wall 22Be connected to the lower end of the third inner wall 22Bc of the male socket 22B. In addition, a pair of circular openings 3Bs are formed near the lower end of the third outer wall 3Bc (and the opposing first outer wall 3Ba) of the female socket 31B, corresponding to the through holes 22Bs.

[0042] A U-shaped pin member 4 is used to connect the valve body 2B and the joint body 3B. The pin member 4 is formed, for example, by bending a metal rod, and comprises a pair of parallel pin portions 4a and a connecting pin portion 4b that connects the ends of the parallel pin portions 4a. The through holes 22Bs, circular openings 3Bs, and pin member 4 constitute the connecting mechanism.

[0043] When assembling the valve body 2B and the joint body 3B, as shown in Figure 6, if the valve body 2B is positioned above the joint body 3B and the two are brought relatively close together, the male socket 22B enters the joint body 3B and the through holes 22Bs align with the circular openings 3Bs.

[0044] Therefore, the parallel pin portion 4a of the pin member 4 is inserted from the circular opening 3Bs into the through hole 22Bs. The inserted parallel pin portion 4a passes through the through hole 22Bs and fits into the opening of the first outer wall 3Ba on the opposite side. Because the parallel pin portion 4a extends across the circular opening 3Bs and the through hole 22Bs, the valve body portion 2B and the joint body portion 3B are held in place and their separation is prevented. The valve body portion 2B and the joint body portion 3B can be engaged and disengaged by removing the parallel pin portion 4a from the circular opening 3Bs.

[0045] For example, a small hole that penetrates radially may be provided at the tip of the parallel pin portion 4a, and a snap pin or cotter pin may be inserted into the small hole at the tip that protrudes from the opening in the first outer wall 3Ba to prevent the parallel pin portion 4a from coming loose.

[0046] As is clear, if the joint body has similar circular openings formed on the first and third outer walls, it can be assembled to the valve body 2B using the pin member 4. Therefore, similar to the first embodiment, by using the valve body 2B as a common part and only replacing the joint body, it can be applied to various piping specifications, thereby reducing the cost of the valve device 1B.

[0047] It should be noted that the present invention is not limited to the embodiments described above. Within the scope of the present invention, any component of the embodiments described above can be modified. Furthermore, any component can be added to or omitted in the embodiments described above. [Explanation of Symbols]

[0048] 1, 1A, 1B valve device 2, 2B Valve body 21 Motor section 22, 22B Male Socket 23 Seat section 24 Valve body 3, 3A, 3B Fitting body 31, 31A, 31B Female sockets 4 Pin Member

Claims

1. A valve body having a male socket with multiple holes, and a valve body having a communication passage that rotates about a rotation axis within the male socket, A fitting body having multiple piping sections and a female socket that can engage with or disengage from the male socket, The system includes a connecting mechanism that connects the valve body and the joint body while the male socket and the female socket are engaged, Depending on the rotational position of the valve body, at least two of the piping portions of the joint body are connected via the communication passage of the valve body and the hole in the male socket. The male socket has four inner walls that surround and are integrated with the axis of rotation, and the outer circumference of the inner walls around the axis of rotation has a male side plane around the hole. The female socket has a female side plane on its inner circumference around the rotation axis, surrounding the opening of the piping section. The O-ring fitted around the hole of the male socket abuts against the female side surface of the female socket over its entire circumference, and the hole of the male socket and the piping portion of the female socket communicate with each other. The seat portion, positioned between the inner circumferential surface of the inner wall of the male socket around the axis of rotation and the valve body, has an inner hole connected to the hole of the male socket, and the valve body and the seat portion come into contact to seal the area around the connection between the communication passage of the valve body and the inner hole, and the inner circumferential surface and the male side plane are arranged to overlap in a direction perpendicular to the axis of rotation, With the seat portion and the valve body positioned inside the inner circumferential surface of the male socket, the male socket is engaged with the female socket. A valve device characterized by the following features.

2. The male socket has multiple holes and male side planes, The female socket has multiple female-side surfaces connected to the piping section, With the male socket and the female socket engaged, the hole in the male socket and the piping portion of the female socket face each other. The valve device according to feature 1.

3. The coupling mechanism has a wedge portion formed on the male socket and a frame portion formed on the female socket. When the male socket and the female socket engage, the wedge portion is housed within the frame portion, preventing the valve body portion and the joint body portion from separating. The valve device according to feature 2.

4. As the valve body and the joint body approach each other, the frame portion undergoes elastic deformation by riding on the wedge portion, and when the wedge portion is housed within the frame portion, the frame portion returns to its original state from elastic deformation. The valve device according to feature 3.

5. The upper inner surface of the frame portion is provided with a slope corresponding to the wedge portion. The valve device according to feature 3 or 4.

6. The coupling mechanism has an opening formed in the female socket, a through hole formed in the male socket, and a pin member. When the male socket and the female socket engage, the separation of the valve body and the joint body is prevented by inserting the pin member into the overlapping opening and the through hole. The valve device according to feature 1.

7. The male side planes of the male socket are rectangular in shape, and there are four of them parallel to the axis of rotation, and the female side planes of the female socket are four of them parallel to the axis of rotation. A valve device according to any one of the features 1 to 6.

8. A valve body that can constitute a valve device by being connected via a connecting mechanism to a joint body having multiple piping sections and a female socket, A male socket that can engage with or disengage from the female socket of the joint body, Multiple holes provided in the male socket, The male socket has a valve body that is rotatable about a rotation axis and has a communication passage, In the engaged state where the male socket and the female socket are engaged, the coupling mechanism prevents the separation of the joint body and the valve body. In the engaged state, at least two of the piping sections are in communication with each other through the communication passage of the valve body and the hole of the male socket, depending on the rotational position of the valve body. The male socket has four inner walls that surround and are integrated with the axis of rotation, and the outer circumference of the inner walls around the axis of rotation has a male side plane around the hole. The female socket has a female side plane on its inner circumference around the rotation axis, surrounding the opening of the piping section. The O-ring fitted around the hole of the male socket abuts against the female side surface of the female socket over its entire circumference, and the hole of the male socket and the piping portion of the female socket communicate with each other. The seat portion, positioned between the inner circumferential surface of the inner wall of the male socket around the axis of rotation and the valve body, has an inner hole connected to the hole of the male socket, and the valve body and the seat portion come into contact to seal the area around the connection between the communication passage of the valve body and the inner hole, and the inner circumferential surface and the male side plane are arranged to overlap in a direction perpendicular to the axis of rotation, With the seat portion and the valve body positioned inside the inner circumferential surface of the male socket, the male socket is engaged with the female socket. A valve body characterized by the following features.

9. The coupling mechanism consists of a frame portion disposed on the female socket and a wedge portion disposed on the male socket and capable of being housed in the frame portion. The valve body according to feature 8.

10. The coupling mechanism consists of an opening provided in the female socket, a through hole provided in the male socket, and a pin that can be inserted through the opening and the through hole. The valve body according to feature 8.

11. The male side planes of the male socket are rectangular in shape, and there are four of them parallel to the axis of rotation, and the female side planes of the female socket are four of them parallel to the axis of rotation. The valve body according to any one of claims 8 to 10.

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