TW201821726A - Coupling member, fluid-device connecting jig, and fluid-device connecting structure - Google Patents

Abstract

A fluid-device connecting structure includes a first fluid device having a first connection part, a second fluid device having a second connection part, an annular seal member to connect the first and second connection parts, and a coupling member to keep the first and second connection parts in a connected state. The coupling member includes a first coupling segment and a second coupling segment, each including at one end a first hinge part or a second hinge part. The first and second connection parts each have a cylindrical outer shape. The first coupling segment has a U-like shape having an opening and surrounds the first and second connection parts over a range more than 180 degrees of an entire circumference of each of the first and second connection parts.

Description

 Connecting member, fluid machine connection jig, and fluid machine connection structure  

The present invention relates to a connecting member used in a fluid machine connection structure, the fluid machine connecting structure having a first fluid device having a first connecting portion, a second fluid device having a second connecting portion, and a first connecting portion and An annular sealing member of the second connecting portion; and a connecting member that maintains a connection state between the first connecting portion and the second connecting portion.

In the chemical liquid control used in semiconductor manufacturing steps, liquid crystal manufacturing steps, and the like, sensors such as flow rate control valves, on-off valves, filters, pressure sensors, flow sensors, and the like are used. A fluid machine such as a body block and a flow block block. In recent years, in order to make the device compact, the connection portions of these fluid machines are directly connected to each other by a connecting member to be unitized.

FIG. 33 is a cross-sectional view showing a normal use state of the connection member 106 of the conventional fluid machine connection structure. FIG. 34 is a cross-sectional view showing an increased fastening state of the coupling member 106 of the conventional fluid machine connection structure.

As shown in FIG. 33, the connecting member 106 is configured by engaging both end portions of the first connecting piece 107 and the second connecting piece 108. One end (first engaging portion) of the first connecting piece 107 and the second connecting piece 108 is rotatably engaged via the support shaft 111. On the other hand, the other end (second engaging portion) of the first connecting piece 107 and the second connecting piece 108 is maintained in a connected state by the following operation, that is, the first extending portion 108c of the second connecting piece 108 is provided. The locking claw 108e that is protruded is inserted into the insertion hole 107e formed in the second extending portion 107c of the first connecting piece 107 while being elastically deformed, and then the locking claw 108e is restored and locked to the second extending portion. 107c. This connection state is a normal use state in which the connection portions are connected to each other by the joint member 106.

The material of the connecting portion, the annular sealing member, and the first and second connecting pieces 107 and 108 is resin. Therefore, for example, when the abnormally high-temperature chemical liquid and the abnormally low-temperature pure water are alternately applied to the connecting portion for a long period of time, the connecting portion may be deformed by creep and the sealing force may be lowered. Once the sealing force is reduced, a liquid leak will occur. In such an emergency, additional tightening is required.

An attachment fastening member 110 for attaching the first and second coupling pieces 107 and 108 to each other and bringing the connection portions closer to each other is attached to the coupling member 106 to increase the sealing force.

The tightening member 110 is inserted into the insertion hole 107d of the first connecting piece 107 and fastened to the bolt hole 108d of the second connecting piece 108, whereby the first and second connecting pieces 107 and 108 are pulled closer together. The connections are close to each other. Thereby, the fastening member 106 is fastened by the addition of the fastening member 110, and the sealing force can be improved.

 [Prior Art Literature]  

Patent Document 1 Japanese Patent No. 5134573

[Patent Document 2] Japanese Patent No. 4457973

However, the conventional connecting member 106 has the following problems. As shown in FIG. 33, the connecting member 106 is provided with a support shaft 111 for integrating the first connecting piece 107 and the second connecting piece 108 in advance, and a radially outer side for maintaining the closing state of the connecting member 106. Since the first extension portion 108c and the second extension portion 107c are formed, the connection member 106 itself has a large body shape.

In addition, since the second engagement portion for the fastening as the safety mechanism is provided on the outer side in the radial direction, the connection member 106 itself has a large body shape. Thus, a large working space for attaching the joint member 106 is required.

Further, as shown in FIG. 35, when a plurality of fluid machines are arranged in parallel on the installation surface 300, in particular, the working space of the central fluid machine is limited on the opposite side of the installation surface 300, and is in the conventional joint member 106. When the connecting member 106 is attached to the fluid machine on both sides, the first connecting piece 107 of the connecting member 106 and the second connecting piece 108 cannot be closed. Even if the connecting member 106 is attached, since it is operated in a direction opposite to the insertion direction and is in a normal use state, the locking claws 108e cannot be engaged, and the fastening state cannot be extended to the hand in order to form an increased fastening state. There is a problem in the small space inside, so there is a problem of poor workability.

The present invention has been made to solve the above problems, and an object of the invention is to provide a fluid machine connection structure that can be installed in a narrow space and has good workability.

The fluid machine connection structure of the present invention has the following configuration in order to solve the above problems.

(1) A connection member for a fluid machine connection structure including: a first fluid device having a first connection portion; a second fluid device having a second connection portion; and a first connection portion; And an annular sealing member between the second connecting portion; and a connecting member that connects the first connecting portion and the second connecting portion via the annular sealing member, wherein the connecting member includes the first connecting piece and The second connecting piece has a rotational connection portion at one end of the first connecting piece and the second connecting piece; the first connecting portion and the second connecting portion have a circular outer shape; and the first connecting piece has a substantially U-shaped shape having an opening. And the first connecting portion and the second connecting portion are engaged with the second connecting piece 180 degrees over the entire circumference.

(2) The connecting member according to (1), wherein the size of the opening is smaller than a diameter (outer diameter) of each tubular portion of the first connecting portion and the second connecting portion; the first connecting piece It can be deformed so that the opening may expand outward in the amount of the difference between the diameter of the opening of the first connecting portion and the second connecting portion.

(3) The connecting member according to (1) or (2) above, characterized in that the first connecting piece is formed with a thin portion having a cutout portion.

(4) The connecting member according to any one of (1) to (3), wherein the rotation connecting portion between the first connecting piece and the second connecting piece is formed to prevent resistance from rotating by its own weight. The generating portion is formed on a surface of the inner circumferential surface of the second connecting piece that is in contact with the first connecting portion and the second connecting portion, and is not in contact with the first connecting portion and the second connecting portion.

(5) The above-described connecting member according to any one of (1) to (4), wherein a T-shaped or L-shaped detachable locking portion is formed on an outer circumference of the first connecting piece.

(6) The connecting member according to any one of (1) to (5) characterized in that the rotating portion is formed on the outer circumference of the second connecting piece.

(7) The connecting member according to any one of (1) to (6), wherein a position of the first connecting piece facing the outer peripheral portion of the first connecting portion and a first connecting piece are A convex protrusion is formed at each of the positions facing the outer peripheral portion of the second connecting portion.

(8) The connecting member according to (7), wherein the second connecting piece is opposed to the outer peripheral portion of the first connecting portion and the outer peripheral portion of the second connecting piece of the second connecting portion. The positions are respectively formed with convex protrusions.

(9) The connecting member according to any one of (1) to (8), wherein the other end of the first connecting piece includes a first locking portion, and the other end of the second connecting piece includes the first one. The first locking receiving portion that is locked by the locking portion, the connecting member is positioned at the first locking position where the first locking portion is engaged with the first locking receiving portion, and the connecting member has the second locking position and is connected When the member is in the first locking position, it is closer to the direction of the annular sealing member than in the second locking position.

(10) The connecting member according to (9) above, wherein the first locking position is a normal use state, and the second locking position is an increased fastening state.

(11) The fluid machine connection jig according to any one of the above-mentioned (1) to (10), wherein the first connecting piece has a second clamp hooking portion formed on the outer peripheral surface, and the second connecting piece a first clamp hooking portion is formed on the outer peripheral surface of the connecting piece; the fluid machine connecting clamp includes a universal hooking portion that is engaged with the first clamp hooking portion; and a first locking portion that is engaged with the second clamp hooking portion The position card hanging portion and the second locking position hook portion.

(12) In the fluid machine connection jig for the connection member according to any one of (1) to (10), the fluid machine connection jig is attached to the first connection portion and the second connection portion from the connection member. The direction in which the directions are the same is inserted, and the first connecting piece and the second connecting piece are engaged.

(13) In the fluid machine connection jig for the above-described connection member according to any one of (1) to (10), the tightening state is indicated by a state in which the fluid machine connection jig is attached to the joint member.

(14) A fluid machine connection structure comprising the above-described connection member according to any one of (1) to (10).

The fluid machine connection structure of the present invention has the following effects and effects.

According to the configuration of the above (1), the first connecting piece has a substantially U-shape having an opening, and the first connecting piece is engaged with the second connecting piece by 180 degrees over the entire circumference of the first connecting portion and the second connecting portion. Therefore, the engaging portion is not provided on the outer side in the radial direction of the connecting member, so that the connecting member itself can be formed compactly. Therefore, even when the tubular portions such as the plurality of fluid machines are arranged in parallel and the wall surface is adjacent to each other and there is no space, the workability can be improved.

According to the configuration of the above (2), the size of the opening of the first connecting piece is smaller than the diameter (outer diameter) of each of the tubular portions of the first connecting portion and the second connecting portion, and the first connecting piece can be outwardly When the size of the opening is expanded so as to be larger than the difference between the diameters (outer diameters) of the tubular portions of the first connecting portion and the second connecting portion, when the first connecting portion and the second connecting portion are attached, Since the first connecting piece can be inserted into the first connecting portion and the second connecting portion to be temporarily fixed to the outside by a certain amount of length, the first connecting piece can be temporarily fixed even after the self-weight or external force is applied.

According to the configuration of the above (3), since the thin portion having the cutout portion is formed in the first connecting piece, when the first connecting piece is attached to the first connecting portion and the second connecting portion, the thin portion is moderately formed. The elastic deformation of the strength and the expansion of the opening are tightened, and the opening is tightened after the attachment. Therefore, the mounting can be performed with an appropriate mounting force and the user feels an appropriate mounting feeling, and the opening is not easily released after the installation, and the workability is good.

According to the configuration of the above (4), the first connecting piece and the second connecting piece are formed on the inner peripheral surface of the second connecting piece, and the first connecting portion and the second connecting portion are not in contact with each other. Therefore, the second connecting piece does not interfere with the first connecting portion and the second connecting portion. In addition, since the frictional resistance is generated in the range where the rotation is possible, the second connecting piece can be placed at a position where the second connecting piece is engaged after the first connecting piece is attached. The position is temporarily fixed and the workability is good.

According to the configuration of the above (5), since the attaching and detaching locking portion is formed on the outer circumference of the first connecting piece, the attaching and detaching locking portion can be clamped, and the jig can be engaged with the attaching and detaching locking portion and pushed. Or it is easy to attach or detach the connecting member, and the workability is good.

According to the configuration of the above (6), since the urging portion is formed on the outer circumference of the second connecting piece, the urging portion is biased in the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion. The second connecting piece can be rotated, and the workability is good.

According to the configuration of the above (7) or (8), the following effects are achieved. In other words, the front end portion of the first locking portion of the first connecting piece and the front end portion of the first locking receiving portion of the second connecting piece are normally in contact with each other and engaged. However, due to the tolerance of the first connecting piece and the second connecting piece, there is a possibility that a gap is formed between the front end portion and the front end portion and the meshing is impossible. This state has no effect on the sealing force, but there is a possibility that the user sees that the installation has not been completed. According to the configuration of the above (7), the position of the first connecting piece facing the outer peripheral portion of the first connecting portion and the position of the first connecting piece facing the outer peripheral portion of the second connecting portion are respectively formed. According to the configuration of the above (8), the second connecting piece has a position facing the outer peripheral portion of the first connecting portion and the second connecting portion and the second connecting portion. Since the first connecting piece and the second connecting piece are pressed radially outward by the first connecting piece and the second connecting piece, the front end portion and the front end portion are formed at the positions where the outer peripheral portions are opposed to each other. There is no gap between them and they can be surely engaged.

According to the configuration of the above (9) or (10), when the liquid leakage is caused by the abnormally high-temperature chemical liquid and the abnormally low-temperature pure water alternately applied to the connecting portion for a long period of time, the first locking is performed due to the liquid leakage. The position and the second locking position are increased by the second locking position in the direction of the annular sealing member, so that the engagement force between the first connecting portion and the second connecting portion can be increased, and the liquid leakage can be taken. Quick response.

According to the configuration of the above (11), the first connecting piece and the second connecting piece can be in the two connection states of the first locking position and the second locking position by the fluid machine connection jig.

According to the configuration of the above (12), since the fluid machine connecting jig can be inserted in the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion, the first connecting piece and the second connecting piece can be engaged with each other. The work can be performed from only one direction, and the work can be easily performed even in a small space in which a plurality of fluid machines are arranged in parallel, and the workability is good.

According to the configuration of the above (13), since the fluid machine connection jig is attached to the connection member, it is possible to easily confirm that the fastening state is increased from the outside, so that the fluid machine that increases the fastening state can be found at a glance during maintenance. And respond, and workability is good.

1‧‧‧Fluid machine connection structure

2‧‧‧1st fluid machine

21‧‧‧1st connection

3‧‧‧2nd fluid machine

31‧‧‧2nd connection

4‧‧‧Aperture sealing member

5‧‧‧Connected components

6‧‧‧1st piece

6a‧‧‧ openings

6d‧‧‧1st resistance protrusion

64‧‧‧1st Carding Department

66a‧‧‧ recess

69‧‧‧ Thin wall

7‧‧‧2nd piece

7b‧‧‧2nd resistance protrusion

7c‧‧‧Chamfering

75‧‧‧1st card bearing department

76‧‧‧Protruding

8‧‧‧Fluid machine connection fixture

82a‧‧‧General Card Holder

84a‧‧‧1st position fixed card holder

84b‧‧‧2nd card position card hook

91, 92, 93, 94, 95‧‧‧ a pair of convex protrusions

Fig. 1 is a perspective view of a connecting member at a first locking position.

Fig. 2 is a perspective view of the connecting member at the first locking position.

3 is a perspective view of the connecting member at the first locking position.

4 is a perspective view of the connecting member at the first locking position.

Fig. 5 is a perspective view of a connecting member in a state before being engaged.

Fig. 6 is a cross-sectional view taken along line AA of Fig. 1;

Fig. 7 is a cross-sectional view taken along line BB of Fig. 5;

Fig. 8 is a view showing a relationship between a joint member and a fluid machine.

Fig. 9 is a front elevational view showing a state in which a joint member is attached to a fluid machine arranged in parallel.

Figure 10 is a perspective view of a fluid machine connection jig.

Figure 11 is a cross-sectional view taken along line CC of Figure 10 .

Fig. 12 (a) is an exploded view of the first fluid device, the second fluid device, and the annular sealing member, and Fig. 12 (b) shows the connection state of the first fluid device, the second fluid device, and the annular sealing member; 12(c) shows a state in which the connecting member is inserted in the connected state of the first fluid device, the second fluid device, and the annular sealing member; and FIG. 12(d) shows the first fluid device and the second fluid. The connecting member is placed in the first locking position in a connected state of the machine and the annular sealing member.

Fig. 13 (a) is a perspective view showing a state before the connecting member is engaged by the jig; Fig. 13 (b) is a perspective view showing a state in which the connecting member is engaged by the jig; Fig. 13 (c) is A perspective view showing a state in which the connecting member is placed at the first locking position by the jig.

Fig. 14 is a perspective view showing a state in which the connecting member is placed at the second locking position by the jig.

Fig. 15 (a) is a front view showing a state before the joint member is engaged by the jig; Fig. 15 (b) is a front view showing a state in which the joint member is engaged by the jig; Fig. 15 (c) This is a front view showing a state in which the connecting member is placed at the first locking position by the jig.

Fig. 16 is an enlarged view showing a portion E of Fig. 15;

Fig. 17 is a front elevational view showing a state in which the connecting member is placed at the second locking position by the jig.

18(a) is a partial cross-sectional view showing a state before the joint member is engaged by a jig; and FIG. 18(b) is a partial cross-sectional view showing a state in the first process of engaging the joint member by the jig; FIG. (c) is a partial cross-sectional view showing a state in the second process of engaging the connecting member by the jig; and (d) of FIG. 18 is a partial cross-sectional view showing a state in which the connecting member is placed at the first locking position by the jig; .

Fig. 19 (a) is a partial cross-sectional view showing a state in which the connecting member is placed in the second locking position by the jig; and Fig. 19 (b) is a view showing that the connecting member is placed on the second card by the jig A partial cutaway view of the state of the position.

Fig. 20 is a front elevational view showing the attachment of the coupling member in a state in which the fluid machines are arranged in parallel.

(a) of FIG. 21 is a perspective view showing a state in which the clamp is hooked to the joint member when the joint member is removed, and FIG. 21(b) is a perspective view showing a state in which the clamp is pulled and the joint member is removed.

(a) of FIG. 22 is a front view showing a state in which the clamp is hooked to the joint member when the joint member is removed, and FIG. 22(b) is a front view showing a state in which the clamp is pulled and the joint member is removed.

Figure 23 is a cross-sectional view taken along line DD of Figure 12(d).

Fig. 24 is an enlarged view of a portion K of Fig. 23;

Fig. 25 is a plan view showing a state in which a connecting member is attached to a fluid machine installed in parallel.

Fig. 26 is a front view of the joint member.

Figure 27 is a rear elevational view of the joint member.

28 is a plan view of a joint member.

29 is a bottom view of the joint member.

Figure 30 is a left side view of the joint member.

Figure 31 is a right side view of the joint member.

32 is a perspective view of a coupling member.

33 is a cross-sectional view of a connecting member at a first locking position of a conventional fluid machine connection structure.

Fig. 34 is a cross-sectional view showing a connecting member at a second locking position in a conventional fluid machine connection structure.

Fig. 35 is a front elevational view showing a state in which a conventional connecting member is attached to a fluid machine installed in parallel.

Fig. 36 is a cross-sectional view showing a first connecting piece of another embodiment.

37 is a cross-sectional view of a second connecting piece of another embodiment.

Fig. 38 is an enlarged view of a portion I of Fig. 36;

39 is a cross-sectional view of the RR of FIG. 38.

Fig. 40 is an enlarged view of a portion J of Fig. 36;

41 is a cross-sectional view taken along line TT of FIG. 40.

Fig. 42 is an enlarged view of the Q portion of Fig. 37;

Figure 43 is a cross-sectional view taken along line UU of Figure 42.

The fluid machine connection structure 1 of the present invention will be described in detail below with reference to the drawings. 1 to 4 are perspective views showing various angles of the joint member 5 at the first locking position. Fig. 5 is a perspective view showing the joint member 5 in a state before the engagement. 6 is a cross-sectional view taken along line AA of FIG. 1; and FIG. 7 is a cross-sectional view taken along line BB of FIG. 5. FIG. 8 shows the relationship between the connecting member 5 and the first fluid machine 2. Fig. 9 is a front elevational view showing a state in which a joint member is attached to a fluid machine arranged in parallel.

In Fig. 12, (a) shows an exploded view of the first fluid machine 2, the second fluid machine 3, and the annular seal member 4. (b) shows the connection state of the first fluid machine 2, the second fluid machine 3, and the annular seal member 4. (c) shows a state in which the first fluid device 2, the second fluid device 3, and the annular sealing member 4 are inserted into the connecting member 5 in a connected state. (d) shows a state in which the connecting member 5 is placed at the first locking position in the connected state of the first fluid machine 2, the second fluid device 3, and the annular seal member 4.

In Fig. 13, (a) shows a state before the coupling member 5 is engaged by the jig 8 in a perspective view. (b) The state in the process of engaging the joint member 5 by the jig 8 is shown in a perspective view. (c) A state in which the connecting member 5 is placed at the first locking position by the jig 8 is shown in a perspective view. Fig. 14 is a perspective view showing a state in which the connecting member 5 is placed at the second locking position by the jig 8. Here, the first locking position of the connecting member 5 indicates the normal use state, and the second locking position indicates the increased fastening state. 15 corresponds to FIG. 13, and FIGS. 15(a) to (c) show front views of FIGS. 13(a) to (c). Fig. 16 is an enlarged view of a portion E of Fig. 15. 17 corresponds to FIG. 14 and shows a front view of FIG. 14.

In Fig. 18, (a) shows a state before the coupling member 5 is engaged by the jig 8 in a partial cross-sectional view. (b) The state in the first process of engaging the connecting member 5 by the jig 8 is shown in a partial cross-sectional view. (c) A state in the second process of engaging the connecting member 5 by the jig 8 is shown in a partial cross-sectional view. (d) A state in which the connecting member 5 is placed at the first locking position by the jig 8 is shown in a partial cross-sectional view. In Fig. 19, (a) shows a state in which the connecting member 5 is placed in the second locking position by the jig 8 in a partial cross-sectional view. (b) A state in which the connecting member 5 is placed at the second locking position by the jig 8 is shown in a partial cross-sectional view.

In addition, in FIGS. 13 to 19, in order to more clearly show the relationship between the connecting member 5 and the jig 8, the first fluid device 2, the second fluid device 3, and the annular sealing member 4 are omitted. In addition, in FIGS. 18 and 19, in order to clearly show the action of the jig 8, the illustration of the concave portions 6b and 7a of the coupling member 5 is omitted. In Fig. 20, a front view showing the attachment of the joint member in a state where the fluid machines are arranged in parallel is shown.

In addition, the connection member 5 of FIGS. 26 to 31 shows a six-side view of the joint member 5 of FIGS. 1 to 4 . Specifically, FIG. 26 is a front view of the connecting member 5, FIG. 27 is a rear view, FIG. 28 is a plan view, FIG. 29 is a bottom view, FIG. 30 is a left side view, and FIG. The connecting member 5 of Fig. 32 is a perspective view of the connecting member 5 of Figs. 1 to 4 . However, the connecting member 5 of FIGS. 26 to 32 is different from the connecting member 5 of FIGS. 1 to 4 in that all of the connecting members 5 are chamfered.

(Configuration of fluid machine connection structure)

First, the overall configuration of the fluid machine connection structure 1 will be described with reference to Fig. 23 . Figure 23 is a cross-sectional view taken along line DD of Figure 12(d). Fig. 24 is an enlarged view of a portion K of Fig. 23;

As shown in FIG. 23, the fluid machine connection structure 1 connects the first connection portion 21 of the first fluid device 2 and the second connection portion 31 of the second fluid device 3 via the annular seal member 4. The connecting member 5 is attached to the outer circumference of the first connecting portion 21 and the second connecting portion 31 to maintain the connected state. The connecting member 5 is composed of a first connecting piece 6 and a second connecting piece 7. The outer shape of the first connecting portion 21 and the second connecting portion 31 is circular. A flow path 29 is formed in the tubular portion 28 of the first connecting portion 21, and a flow path 39 is formed in the tubular portion 38 of the second connecting portion 31. Further, the tubular portions 28 and 29 include flange abutting portions respectively adjacent to the flange portions 25 and 35 to be described later.

As shown in FIG. 24, the annular seal member 4 includes a main body portion 43, a projecting portion 44 projecting from the outer circumferential surface of the main body portion 43 in the outer diameter direction, and a grip portion 45 provided on the outer peripheral edge portion of the projecting portion 44. Annular seal grooves 46, 47 are formed in the main body portion 43. The material of the annular seal member 4 is a fluororesin which is relatively hard and has corrosion resistance such as PFA or PTFE. (In addition, in the cross section of the annular seal member 4 in FIGS. 23 and 24, it is labeled for easy observation. A hatching pattern of a pattern different from the connecting member 5 made of a resin).

An end surface 22 is formed on a surface of the first connecting portion 21 to which the annular sealing member 4 is attached. A locking convex portion 27 that protrudes outward in the radial direction of the first connecting portion 21 is formed on the end surface 22 . A press-fitting portion 24 for mounting in the annular seal groove 46 of the main body portion 43 of the annular seal member 4 is formed on the radially inner side of the end surface 22. Further, in the first connecting portion 21, the mounting groove 23 for attaching the connecting member 5 in the axial direction of the flow path 29 on the side opposite to the end surface 22 is formed in a ring shape at the flange abutting portion. A flange portion 25 is provided between the end surface 22 and the mounting groove 23. A connection side slope surface 26 is formed in the flange portion 25.

An end surface 32 is formed on a surface of the second connecting portion 31 for mounting the annular sealing member 4. A locking convex portion 37 that protrudes outward in the radial direction is formed on the end surface 32. A press-fitting portion 34 is formed on the radially inner side of the end surface 32, and the press-fitting portion 34 is attached to the annular seal groove 47 of the main body portion 43. The mounting groove 33 for attaching the connecting member 5 in the outer peripheral surface in the flow path 39 direction is formed in a ring shape in the flange abutting portion. A flange portion 35 is provided between the end surface 32 and the mounting groove 33. A connection side slope surface 36 is formed in the flange portion 35.

(composition of the connecting member)

The internal structure of the connection of the connection member 5 for connecting the first fluid machine 2 and the second fluid device 3 will be described.

As shown in FIG. 1 , the connecting member 5 has a cylindrical shape and has a first connecting piece 6 and a second connecting piece 7 . The material of the first connecting piece 6 and the second connecting piece 7 is a fluororesin having strength and corrosion resistance (in addition, in the cross section of the first connecting piece 6 and the second connecting piece 7 of FIG. 6 and the like, for easy observation, A diagonal line is drawn which is different from the hatching used for the usual resin (Fig. 23). The inner circumferential surfaces of the first connecting piece 6 and the second connecting piece 7 are formed in an arc shape so as to be attachable along the outer circumferences of the first connecting portion 21 and the second connecting portion 31. The connecting member 5 is made to resist the first connecting portion 21 and the second connecting portion 31 in the axial direction of the flow paths 29 and 39 of the annular seal member 4 that is attached between the first connecting portion 21 and the second connecting portion 31. The force acting in a distance away maintains the connection state between the first connecting portion 21 and the second connecting portion 31.

As shown in FIG. 23, in the connection member 5, the first protrusion 60 of the first connecting piece 6 and the first protrusion 70 of the second connecting piece 7 are disposed in the mounting groove 23, and the second piece of the first connecting piece 6 The protrusion 61 and the second protrusion 71 of the second connecting piece 7 are disposed in the mounting groove 33. In the first connecting piece 6 of the connecting member 5, the connecting side slope faces 60a, 61a are formed at positions corresponding to the connecting side slope surface 26 of the first connecting portion 21 and the connecting side slope surface 36 of the second connecting portion 31, respectively. . The connection structure between the first connecting piece 6 and the second connecting piece 7 of the connecting member 5 and the first connecting portion 21 and the second connecting portion 31 is vertically symmetrical as shown in FIG. 23, and therefore, the first connecting piece 6 will be described. The connection structure is omitted, and the description of the connection structure of the second connecting piece 7 is omitted.

Next, a more detailed appearance configuration of the connecting member 5 will be described with reference to Figs. 1 to 9 . Further, although the reference numerals A and B are attached to the pair of structures, the description will be complicated, and the reference numerals A and B will be omitted as appropriate.

As shown in FIG. 7 , the first connecting piece 6 of the connecting member 5 has a substantially U-shape having an opening 6 a in a cross section orthogonal to the axial direction of the connecting member 5 . The first connecting piece 6 is at a position exceeding 180 degrees over the entire circumference of the connecting member 5, in other words, at a position exceeding 180 degrees over the entire circumference of the circular cross section of the first connecting portion 21 and the second connecting portion 31. The second connecting piece 7 is engaged. The second connecting piece 7 has a shape that covers the opening 6a of the first connecting piece 6. A plurality of concave portions 6b and 7a recessed in the axial direction are radially formed on the surface of the first connecting piece 6 and the second connecting piece 7 in the axial direction. As shown in FIG. 2, the end portion 65 is formed at one end of the first connecting piece 6 in the circumferential direction, and the first hinge portion 63 is formed at both ends of the end portion 65 in the axial direction. A second hinge portion 73 is formed at one end of the second connecting piece 7 in the circumferential direction, and the second hinge portion 73 is rotatably engaged with the first hinge portion 63. In the first hinge portion 63, a mark convex portion 63a is formed along the axial direction on the outer circumference. Further, in the second hinge portion 73, a mark convex portion 73a is formed along the axial direction on the outer circumference. By visually or tactilely confirming that the mark convex portion 63a and the mark convex portion 73a are on the same straight line as shown in Fig. 2, it is known that the normal engagement position is obtained. In addition, the first hinge portion 63 and the second hinge portion 73 of the present embodiment are examples of the "rotation coupling portion" of the present invention.

As shown in FIG. 5, the other pair of first engaging portions 64 (64A, 64B) are erected toward the second connecting piece 7 in the axial direction of the connecting member 5 at the other end of the first connecting piece 6 in the circumferential direction. end. In addition, since the first locking portions 64A and 64B have the same shape, the first locking portions 64 will be described below. The front end portion 64aa that is bent outward in the radial direction is formed at the distal end of the first locking portion 64.

In the center of the inner peripheral surface of the first connecting piece 6, a partially cut portion 69a is formed, and a thin thin portion 69 is formed on the outer peripheral edge of the first connecting piece 6. On the outer circumferential surface of the first connecting piece 6, a pair of attachment and detachment locking portions 68 (68A, 68B) having a T shape are formed at positions corresponding to the thin portion 69. A convex portion 66 is formed on the outer circumferential surface of the first connecting piece 6 on the side of the first locking portion 64. In the convex portion 66, a concave portion 66a recessed in the center in the axial direction is formed at the other end of the first connecting piece 6 in the circumferential direction. The concave portion 66a overlaps with the projection portion 76 of the second connecting piece 7 to be described later, and it is known that the fastening state is increased. In the convex portion 66, a smooth curved surface portion 66b is formed toward the attachment and detachment locking portion 68. A second clamp hooking portion 66c is formed between the curved surface portion 66b and the attaching and detaching locking portion 68. The second jig hook portion 66c protrudes toward the attaching and detaching locking portion 68. A clamp engagement surface 66d is formed on the opposite side of the curved surface portion 66b of the second clamp hook portion 66c. At both ends in the axial direction of the first connecting piece 6, a concave portion 6c is formed over the entire circumference. The recess 6c is formed one layer smaller than the convex portion 66. Even when the fluid machine is installed in parallel as shown in FIG. 20, since the recessed portion 6c is present, the jig 8 can be made to enter the connecting member 5, and interference with the adjacent connecting member 5 can be avoided.

As shown in FIG. 5, the pair of first locking receiving portions 75 that are engaged with the first locking portions 64 (64A, 64B) of the first connecting piece 6 at the other end of the second connecting piece 7 in the circumferential direction ( 75A, 75B) are provided at the opposite ends of the connecting member 5 in the axial direction toward the first connecting piece 6. In addition, since the first locking receiving portions 75A and 75B have the same shape, the first locking receiving portion 75 will be described below. A distal end portion 75aa that is bent inward in the radial direction is formed at the distal end of the first locking receiving portion 75. Further, on the surface of the inner peripheral surface of the second connecting piece 7 that is in contact with the first connecting portion 21 and the second connecting portion 31, a surface that does not abut against the first connecting portion 21 and the second connecting portion 31 is formed. Corner 7c. A slope is formed in the chamfered portion 7c, and interference between the flange portion 25 of the first connecting portion 21 and the flange portion 35 of the second connecting portion 31 shown in Fig. 24 can be avoided, so that the second connecting piece can be formed. 7 smoothly approaches the first connecting piece 6 to a position where the jig 8 to be described later is caught.

The distal end portion 64aa of the first locking portion 64 and the distal end portion 75aa of the first locking receiving portion 75 are engaged as shown in Fig. 16 . This is the first card position. In this state, the elastic force toward the first locking portion 64 always acts on the first locking receiving portion 75. Therefore, since the distal end portion 64aa and the distal end portion 75aa are engaged with each other in a plane, when the force for disengaging the connecting member 5 acts, the distal end portion 64aa and the distal end portion 75aa are engaged with each other, and can be kept free from disengagement. At the first locking position, a gap X is formed between the distal end portion 75aa of the first locking receiving portion 75 and the first locking portion 64, and the distal end portion 64aa of the first locking portion 64 and the first locking portion are received. A gap Y is formed between the portions 75. The front end portion 64aa and the front end portion 75aa can be surely engaged by the gap X and the gap Y.

As shown in Fig. 1, between the first locking receiving portions 75A and 75B of the second connecting piece 7, one extending portion 78 extends outward in the radial direction. A protruding portion 76 is provided in the center of the front end of the extending portion 78 in the direction of the first connecting piece. On the opposite side of the protruding portion 76 of the extending portion 78, a first jig engaging portion 77 is formed to protrude in the axial direction.

As shown in FIG. 2, on the side of the second hinge portion 73 of the second connecting piece 7, the rotation acting portion 74 is formed to protrude outward in the radial direction on the outer peripheral surface. As shown in FIG. 7, when the first connecting piece 6 and the second connecting piece 7 are opened, the turning action portion 74 is engaged with the end portion 65 of the first connecting piece 6, so that the second connecting piece 7 does not rotate more than a certain extent. At this time, as shown in the fourth connecting member 5 on the right side of FIG. 20 (FIG. 20(e)), the second connecting piece 7 can be moved to the second connecting piece 7 by pushing the rotating action portion 74 from one direction by the jig 8. The locking portion 64 is rotated in a direction in which the first locking receiving portion 75 approaches.

Further, a first resistance protrusion 6d is formed in the vicinity of the first hinge portion 63 of the first connecting piece 6 and on the inner peripheral side of the end portion 65. In the vicinity of the second hinge portion 73 of the second connecting piece 7, a second resistance protrusion 7b that abuts against the first resistance protrusion 6d is formed. When the first resistance protrusions 6d are in contact with the second resistance protrusions 7b, frictional force can be generated by friction with each other, and rotation by self-weight can be prevented, and temporary fixation can be performed. In addition, the first resistance protrusion 6d and the second resistance protrusion 7b of the present embodiment are examples of the "resistance generating portion" of the present invention.

(construction of the fixture)

Next, the configuration of the fluid machine connection jig 8 (hereinafter simply referred to as a jig) will be described with reference to FIGS. 10 and 11 . FIG. 10 shows a perspective view of the jig 8. Figure 11 shows a CC cross-sectional view of Figure 10.

The jig 8 has a rectangular shape of a thin plate shape. One end of the jig 8 in the longitudinal direction (the upper end in FIG. 10) is formed with a pair of attaching and detaching locking receiving portions 81A and 81B that engage with the attaching and detaching locking portions 68A and 68B of the connecting member 5. The attaching and detaching locking receiving portions 81A and 81B are formed to protrude from the both ends in the width direction of the jig 8 toward the center. A protruding portion 81aa is formed between the attaching and detaching locking receiving portions 81A and 81B. Further, at one end in the longitudinal direction of the jig 8, a stopper portion 81bb that spans the protruding portion 81aa is formed between the detachable locking receiving portions 81A and 81B.

The other end of the jig 8 in the longitudinal direction (the lower end in FIG. 10) is formed with a quadrangular first penetration portion 82, and is formed at a position corresponding to the other end of the first penetration portion 82 in the longitudinal direction of the jig 8. The hook portion 82a. A rectangular second penetration portion 83 is formed at the center of the jig 8 adjacent to the first penetration portion 82, and the support shaft 86 integral with the rotation member 84 is rotatably held by the support shaft hole of the second penetration portion 83. 83a. One end of the rotating member 84 is formed with a first locking position catching portion 84a formed with a rounded edge. The other end of the rotating member 84 is formed with a second locking position catching portion 84b having a smaller width than the first locking position catching portion 84a. Further, as shown in FIG. 11, the length L1 from the front end of the first locking position catching portion 84a to the central axis of the support shaft 86 is formed to be longer than the front end from the second locking position catching portion 84b to the support shaft 86. The length of the central axis L2 is short. In the second penetration portion 83, a pair of convex portions 83b are formed on both ends in the width direction of the jig 8 (see FIG. 22) on the side close to the attachment and detachment receiving portions 81A and 81B. Since the convex portion 83b is provided, the second locking position catching portion 84b having a small width can pass through the inside of the second penetration portion 83 (between the pair of convex portions 83b), but the first locking position having a large width is caught. The portion 84a abuts against the passage of the convex portion 83b, and can control the rotation of the rotating member 84. A branch portion 84c is erected on the second locking position catching portion 84b side of the rotating member 84. A detachable cross bar 85 is formed between the first penetration portion 82 and the second penetration portion 83.

(The role of the fluid machine connection structure)

The normal use state of the connecting member 5 from the initial state to the first locking position will be described with reference to FIGS. 12 to 13 , 15 to 16 , and 18 . As shown in FIG. 12( d ), the normal use state refers to a state in which the connecting member 5 is placed at the first locking position. At the first locking position, the first locking portion 64 of the first connecting piece 6 is engaged with the first locking receiving portion 75 of the second connecting piece 7.

First, as shown in Fig. 12 (a) and (b), the annular seal member 4 is placed between the first fluid device 2 and the second fluid device 3, and the annular seal member 4 is pressed into the mold using a jig (not shown). After the first fluid machine 2 is temporarily connected to the second fluid machine 3, as shown in FIG. 12(c), the recessed portion 6b of the connecting member 5 is not observed. At this time, as shown in FIG. 8, the size N of the opening portion 6a of the first connecting piece 6 is formed larger than the diameter (outer diameter) of the tubular portion 28 of the first connecting portion 21 and the tubular portion 38 of the second connecting portion 31. P is small. In particular, since the thin portion 69 of the first connecting piece 6 is elastically deformed, the first connecting piece 6 is attached to the tubular portion 28 of the first connecting portion 21, and the diameter P and the opening of the tubular portion 28 are formed. The amount of difference M in the size of 6a is expanded outward, and can be fitted to a portion of the entire circumference of the first connecting portion 21 and the second connecting portion 31 that exceeds 180 degrees. Then, as shown in FIG. 12(d), the second connecting piece 7 is engaged with the first locking position of the first connecting piece 6, and the connection in the normal use state is completed. At this time, the concave portions 6b, 7a of the joint member 5 cannot be seen. Since the recessed portions 6b and 7a are concealed in the first connecting portion 21 and the second connecting portion 31, they are not visible from the outside. Therefore, it can be confirmed that the connection is achieved at the correct position.

Further, the attachment of the connecting member 5 in the narrow space in which the hand cannot be inserted into the inside as shown in Fig. 9 will be described with reference to Fig. 20 . Fig. 20 (a) shows the connection completion state in normal use. The connecting step is sequentially shown from Figs. 20(b) to (h). As shown in FIG. 20(b), the second connecting piece 7 is inserted between the first connecting portion 21 and the second connecting portion 31 which are temporarily connected, from the opposite side of the installation surface 300, between the adjacent tubular portion 28. . As shown in FIG. 20( c ), the second connecting piece 7 is rotated toward the tubular portion 28 side in advance, and the first connecting piece 6 is attached to the first connecting portion 21 and the second connecting portion 31 . As shown in FIG. 20(d), when the first connecting piece 6 is fitted into the tubular portion 28, the second connecting piece 7 abuts against the installation surface 300 and further rotates toward the tubular portion 28 side. As shown in Fig. 20(e), the elongated jig 8 is inserted from the side opposite to the installation surface 300 on the side of the first hinge portion 63 until the rotation action portion 74 of the second coupling piece 7 is pushed out by the tip end of the jig 8. As a result, the second connecting piece 7 is pivoted about the second hinge portion 73, and the first locking receiving portion 75 is brought close to the first connecting piece 6, and the first resistance protrusion 6d is in contact with the second resistance protrusion 7b. The friction generated by mutual friction is temporarily fixed at the position. As shown in Fig. 20 (f), (g) and (h), the elongated jig 8 is inserted from the side opposite to the installation surface 300 on the first locking portion 64 side, and the second connecting piece 7 is moved during the lifting operation. The upper side is placed on the first connecting piece 6.

Here, the steps of FIGS. 20(f), (g) and (h) will be described in detail with reference to FIG. 18. As shown in FIGS. 18( a ) and ( b ), the jig 8 is placed on the side surface of the connecting member 5 in the same direction as the direction in which the connecting member 5 is attached. At this time, since the jig 8 is entered along the concave portion 6c of the coupling member 5, interference with the adjacent coupling member 5 can be avoided even if the fluid machines are arranged side by side. Then, as shown in FIG. 20(f), the universal hook portion 82a of the jig 8 is engaged with the first clamp hook portion 77 of the second connecting piece 7 that is temporarily fixed at a position close to the first connecting piece 6. .

Next, the jig 8 is pushed in the direction of the arrow F. As shown in Fig. 18 (c) and (d), the second locking position catching portion 84b is also pushed in the direction of the arrow F, so that the first locking position catching portion 84a is along the first connecting piece 6 The jig engagement surface 66d is engaged with the second jig hook portion 66c. Thereby, the first locking portion 64 is brought into close contact with the first locking receiving portion 75 and is positioned at the first locking position. Then, the second locking position catching portion 84b of the jig 8 is pushed to the opposite side in the direction of the arrow F, the jig 8 is detached from the first jig holding portion 77, and the jig 8 is removed to complete the connection in the normal use state. At this time, as shown in FIG. 6, a gap S is formed between the convex portion 66 of the first connecting piece 6 and the extending portion 78 of the second connecting piece 7. Further, at this time, as shown in FIG. 6, the position of the tip end of the projection portion 76 coincides with the position of the end portion of the recessed portion 66a, and it is possible to confirm the connection in the normal use state by visually observing the position.

In this manner, since the jig 8 can be inserted in the same direction as the direction in which the connecting member 5 is attached to the first connecting portion 21 and the second connecting portion 31, the first connecting piece 6 and the second connecting piece 7 can be engaged with each other. When the work is performed in one direction, even in a narrow space in which a plurality of fluid machines are arranged in parallel, work can be easily performed, and workability is good.

Next, an increased fastening state in which the connecting member 5 is placed at the second locking position from the first locking position will be described with reference to FIGS. 14 , 17 , and 19 .

Here, the first connecting portion 21 and the second connecting portion 31 generate creep deformation when a liquid (chemical liquid) having abnormally high temperature for a long period of time and a liquid (pure water) having abnormally low temperature alternately flow alternately, or When the annular seal member 4 is connected to the state in which the first connection portion 21 and the second connection portion 31 are engaged with foreign matter, the sealing force is lowered. Once the sealing force is reduced, a liquid leak will occur. In such an emergency, the fastening of the joint member 5 is performed.

In the increased fastening, the second locking position catching portion 84b is used, and the first locking position catching portion 84a of the jig 8 used when the connecting member 5 is placed at the first locking position is used. 2 The distance between the locking position catching portion 84b and the supporting shaft 86 is longer. In order to rotate the rotating member 84 using the second locking position catching portion 84b, the cross bar 85 of the jig 8 is removed. Thereby, the rotating member 84 can be rotated. By increasing the step of removing the cross bar 85, it is possible to prevent the erroneous tightening.

As shown in FIG. 19( a ), the universal hook portion 82 a of the jig 8 is engaged with the first clamp hook portion 77 of the second connecting piece 7 . Next, the jig 8 is pushed in the direction of the arrow G. At the same time, the first locking position catching portion 84a is pushed in the direction of the arrow G, so that the second locking position catching portion 84b is engaged with the second clamp hooking portion 66c along the clamp engagement surface 66d. Further, the first locking position catching portion 84a is positioned in contact with the convex portion 83b. Since the first locking position catching portion 84a is longer than the second locking position catching portion 84b, the first connecting piece 6 and the second connecting piece 7 have a strong action in the direction in which the first connecting piece 6 approaches the second connecting piece 7 in accordance with the principle of the lever. At this time, the first connecting piece 6 and the second connecting piece 7 are brought close to each other while filling the gap S between the convex portion 66 of the first connecting piece 6 and the extending portion 78 of the second connecting piece 7 .

As shown in FIGS. 23 and 24, in the first connecting piece 6 of the connecting member 5, a connecting side slope is formed at a position corresponding to the connecting side slope faces 26, 36 of the first connecting portion 21 and the second connecting portion 31. When the first connecting piece 6 and the second connecting piece 7 are close to each other, the connecting side slope faces 26 and 36 press the connecting side slope faces 60a and 61a, and the first connecting portion 21 and the second connecting portion are pressed. 31 is pressed against the side of the annular sealing member 4, so that liquid leakage can be prevented. In addition, the connection structure of the second connecting piece 7, the first connecting portion 21, and the second connecting portion 31 is vertically symmetrical as shown in FIG. 23, and therefore also occurs on the second connecting piece 7 side. The same is true for the connecting piece 6.

By the steps here, the positioning of the joint member 5 in the second locking position in the increased fastening state is completed in a state in which the jig 8 is engaged with the joint member 5.

Further, since the jig 8 is attached to the joint member 5, the operator can be made aware that the work for increasing the tightening has been completed. Since the state in which the jig 8 is attached to the joint member 5 is shown to increase the tightening state, it can be easily confirmed from the appearance that the tightening state is increased, so that at the time of maintenance, the fluid in which the tightening state is increased can be found at a glance. In the machine, it is possible to perform a process of stopping the fluid, replacing the connecting member 5, and the like, and the workability is good.

The detachment of the joint member 5 will be described with reference to Figs. 21 and 22 . In FIG. 21, (a) is a perspective view showing a state in which the jig 8 is caught by the connecting member 5 when the connecting member 5 is detached. (b) is a perspective view of a state in which the jig 8 is pulled and the connecting member 5 is detached. In FIG. 22, (a) is a front view showing a state in which the jig 8 is caught by the connecting member 5 when the connecting member 5 is detached. (b) is a front view of a state in which the jig 8 is pulled and the connecting member 5 is detached.

The jig 8 is used at the time of disassembly of the joint member 5. As shown in Fig. 21 (a) and Fig. 22 (a), the protruding portion 81aa of the jig 8 is inserted between the pair of attaching and detaching locking portions 68A, 68B of the connecting member 5, and a pair of the jig 8 is attached and detached. The locking receiving portions 81A and 81B slide with respect to the attaching and detaching locking portions 68A and 68B of the connecting member 5 until they abut against the stopper portion 81bb of the jig 8 and are engaged. After the detachable locking receiving portions 81A and 81B are firmly engaged with the detachable locking portions 68A and 68B, the jig 8 is pulled in the direction of the arrow H, and the first locking portion 64 of the connecting member 5 and the first member are first The engagement of the locking receiving portion 75 is released, and the connecting member 5 can be removed from the first fluid device 2 and the second fluid device 3.

Further, the connecting member 5 can be attached in accordance with the reverse of the steps shown above.

36 to 43 show other embodiments of the joint member 5. FIG. 36 is a cross-sectional view of the first connecting piece 6. 37 is a cross-sectional view of the second connecting piece 7. 38 is an enlarged view of a portion I of FIG. 36, and FIG. 39 is a cross-sectional view of the RR of FIG. 38. 40 is an enlarged view of a portion J of FIG. 36, and FIG. 41 is a cross-sectional view taken along line TT of FIG. 40. Fig. 42 is an enlarged view of a portion Q of Fig. 37, and Fig. 43 is a cross-sectional view taken along line UU of Fig. 42.

As shown in FIG. 36, the inner peripheral surface of the first connecting piece 6 is opposed to the connecting side slope surface 26 of the outer peripheral portion of the flange portion 25 as the first connecting portion 21, and the second connecting portion. A pair of convex protrusions 91, a pair of convex protrusions 91, a pair of convex protrusions 93, and a pair of convex protrusions 94 are respectively opposed to the connection side slope surface 36 of the outer peripheral portion of the flange portion 35 of the 31. Formed in opposite positions.

Further, on the inner peripheral surface of the second connecting piece 7, a pair is formed at a position facing the connecting side slope surface 26 which is the outer peripheral portion of the flange portion 25 and the connecting side slope surface 36 which is the outer peripheral portion of the flange portion 35. Convex protrusion 95.

The shape of the pair of convex protrusions 91 is shown enlarged in FIGS. 38 and 39. As shown in the figure, the pair of convex protrusions 91 are located on the inner peripheral surface of the first connecting piece 6, and have a predetermined length in the direction along the inner peripheral surface, and protrude toward the radially inner side of the connecting member 5. The pair of convex protrusions 92 have the same shape as the pair of convex protrusions 91.

The shape of the pair of convex protrusions 93 is shown enlarged in FIGS. 40 and 41. As shown in the figure, the pair of convex protrusions 93 are located on the inner peripheral surface of the first connecting piece 6, and have a predetermined length in the direction along the inner peripheral surface, and protrude toward the inner side in the radial direction of the connecting member 5. The pair of convex protrusions 94 have the same shape as the pair of convex protrusions 93.

The shape of the pair of convex protrusions 95 is shown enlarged in FIGS. 42 and 43. As shown in the figure, the pair of convex protrusions 95 are located on the inner peripheral surface of the second connecting piece 7, and have a predetermined length in the direction along the inner peripheral surface, and protrude toward the inner side in the radial direction of the connecting member 5.

Next, the action and effect of the pair of convex protrusions 91, 92, 93, 94, and 95 will be described separately.

As shown in FIG. 16, the front end portion 64aa of the first locking portion 64 of the first connecting piece 6 and the front end portion 75aa of the first locking receiving portion 75 of the second connecting piece 7 are normally engaged with each other. However, due to the tolerance of the first connecting piece 6 and the second connecting piece 7, there is a possibility that a gap is formed between the abutting faces of the distal end portion 64aa and the distal end portion 75aa, and the meshing is impossible. Although this state has no influence on the sealing force, there is a possibility that the user sees that the installation is not completed when it is seen.

In the present embodiment, the inner peripheral surface of the first connecting piece 6 is opposed to the connecting side slope surface 26 which is the outer peripheral portion of the flange portion 25, and the connection side which is the outer peripheral surface of the flange portion 35. A pair of convex protrusions 91, a pair of convex protrusions 92, a pair of convex protrusions 93, and a pair of convex protrusions 94 are formed at positions facing each other at the slope surface 36, and further, the second connection piece 7 is formed. On the inner peripheral surface, a pair of convex protrusions 95 are formed at a position opposing the connection side slope surface 26 which is the outer peripheral portion of the flange portion 25 and the connection side slope surface 36 which is the outer peripheral portion of the flange portion 35. Since the first connecting piece 6 and the second connecting piece 7 are pressed outward in the radial direction, there is no gap between the abutting faces of the distal end portion 64aa and the distal end portion 75aa, and the meshing can be surely performed.

Further, in the present embodiment, five pairs of convex protrusions are formed, but two pairs, three pairs, four pairs, six pairs, or seven pairs of convex protrusions may be formed.

As described above, according to the fluid machine connection structure 1 of the present embodiment, (1) a connection member for the fluid machine connection structure 1 having the first connection portion 21 1 fluid machine 2; second fluid device 3 having second connection portion 31; annular sealing member 4 connecting first connection portion 21 and second connection portion 31; and maintaining first connection portion 21 and second connection portion 31 The connecting member 5 in the connected state is characterized in that the connecting member 5 includes the first connecting piece 6 and the second connecting piece 7, and has a first end in the circumferential direction of the first connecting piece 6 and the second connecting piece 7 The hinge portion 63 and the second hinge portion 73; the outer shape of the first connection portion 21 and the second connection portion 31 are circular; the first connecting piece 6 is substantially U-shaped having the opening portion 6a, and exceeds the first connection portion 21 Since the second connecting piece 31 is engaged with the second connecting piece 7 at 180 degrees over the entire circumference of the second connecting portion 31, the engaging member is not provided with the engaging portion on the outer side in the radial direction of the connecting member 5, and the connecting member itself can be formed compactly. Thus, even when the fluid devices 1 are provided in parallel, the tubular portions 28 and 38 are adjacent to each other or the wall surface, and there is no space, and the workability is good.

(2) In the above-described connecting member 5, the size N of the opening portion 6a is formed smaller than the diameter P of each of the tubular portions 28 and 38 of the first connecting portion 21 and the second connecting portion 31; the first connection The sheet 6 can be deformed such that the size of the opening portion 6a outward is different from the difference M between the diameters P of the tubular portions 28 and 38 of the first connecting portion 21 and the second connecting portion 31. Therefore, the first connecting piece can be deformed. Since the first connecting portion 21 and the second connecting portion 31 can be temporarily fixed to the outside by being expanded to a certain length, the first connecting portion 21 and the second connecting portion 31 can be temporarily fixed. Therefore, even if self-weight or external force is applied after the fitting, it is not easily released, and the workability is good.

(3) In the above-described connecting member 5 of (1) or (2), the thin portion 69 having the cutout portion 69a is formed in the first connecting piece 6, and therefore, the first connecting piece 6 is When the first connecting portion 21 and the second connecting portion 31 are attached, the thin portion 69 is elastically deformed with an appropriate strength, the opening portion 6a is expanded, and the opening portion 6a is tightened after the mounting, so that an appropriate mounting force can be used. The operator feels that the installation feeling is moderate, and the installation is not easy to disengage after installation, and the workability is good.

(4) The connecting member 5 according to any one of (1) to (3), wherein the first connecting piece 6 and the second connecting piece 7 are rotatably connected to each other to prevent rotation by their own weight. The first resistance protrusion 6d and the second resistance protrusion 7b are formed on the inner peripheral surface of the second connecting piece 7 on the surface abutting on the first connecting portion 21 and the second connecting portion 31, and the first connection is formed. Since the first resistance piece 6d of the first connecting piece 6 abuts against the second resistance protrusion 7b of the second connecting piece 7 by the chamfered portion 7c which is not in contact with the second connecting portion 31, the second resisting projection 7d of the first connecting piece 6 can be in contact with the second resisting projection 7b of the second connecting piece 7 When the connecting piece 6 and the second connecting piece 7 are close to each other, frictional force is generated and can be temporarily fixed, so that the workability is good. Further, since there is a range in which the first connecting portion 21 and the second connecting portion 31 can freely rotate without interfering with each other, a certain degree of frictional resistance is generated. Therefore, after the first connecting piece 6 is mounted, the second connecting piece 6 is mounted. During the engagement of the connecting piece 7, the position of the second connecting piece 7 can be temporarily fixed at a position where work is easy, and the workability is good.

(5) The connecting member 5 according to any one of (1) to (4), wherein the T-shaped or L-shaped detachable locking portions 68A, 68B are formed on the outer circumference of the first connecting piece 6. Therefore, the attachment and detachment locking portions 68A and 68B can be clamped, and the coupling member 5 can be easily attached or detached by engaging and squeezing or pulling the jig 8 with the detachable locking portions 68A and 68B. Therefore, the workability is good.

(6) The connecting member 5 according to any one of (1) to (5), wherein the rotating portion 74 is formed on the outer circumference of the second connecting piece 7, and the first connecting member 5 is attached to the first connecting member 5 When the direction in which the direction of the connection portion 21 and the second connection portion 31 are the same is applied to the urging portion 74, the second connecting piece 7 can be rotated, and the workability is good.

(7) The connection member 5 according to any one of (1) to (6), wherein the first connection piece 6 is opposed to the outer peripheral portion of the first connection portion 21 and the first connection The protrusions 91, 92, 93, and 94 are respectively formed at positions facing the outer peripheral portion of the second connecting portion 31, and (8) is characterized by the second connecting piece 7 and the second connecting piece 7 The convex portion 95 is formed at a position where the outer peripheral portion of the connecting portion 21 faces and a position of the second connecting piece 7 facing the outer peripheral portion of the second connecting portion 31.

According to the configuration of (7) or (8), the following effects are exhibited. In other words, as shown in FIG. 16 , the distal end portion 64aa of the first locking portion 64 of the first connecting piece 6 and the distal end portion 75aa of the first locking receiving portion 75 of the second connecting piece 7 are normally in contact with each other. However, due to the tolerance of the first connecting piece 6 and the second connecting piece 7, there is a possibility that a gap is formed between the distal end portion 64aa and the distal end portion 75aa, and the meshing is impossible. Although this state does not affect the sealing force, there is a possibility that the user sees that the installation is not completed when he sees it. The first connecting piece 6 is opposed to the connecting side slope surface 26 which is the outer peripheral portion of the flange portion 25, and the connecting side slope surface 36 of the first connecting piece 6 which is the outer peripheral portion of the flange portion 35. The pair of convex protrusions 91, 92, 93, and 94 are formed at the opposite positions, and the second connection piece 7 is also opposed to the connection side slope surface 26 which is the outer peripheral portion of the flange portion 25, The pair of convex protrusions 95 are formed at positions facing the connection side slope surface 26 which is the outer peripheral portion of the flange portion 35 of the second connecting piece 7, and therefore the first connecting piece 6 and the second connecting piece 7 are convexly convex. Since the portions 91, 92, 93, and 94 and the connection-side slope surfaces 26 and 36 are deformed to each other and are pressed outward in the radial direction, there is no gap between the distal end portion 64aa and the distal end portion 75aa, and the meshing can be surely performed.

(9) The connecting member 5 according to any one of (1) to (8), wherein the other end of the first connecting piece 6 in the circumferential direction includes the first locking portion 64, and the second connecting piece 7 The other end of the circumferential direction includes a first locking receiving portion 75 that is locked by the first locking portion 64, and the first locking portion of the connecting member 5 that is engaged with the first locking receiving portion 75 by the first locking portion 64 is engaged. The position is positioned; the connecting member 5 has a second locking position, and is closer to the annular sealing member than when the connecting member 5 is at the first locking position, and is characterized in that (10) The first locking position is a normal use state, and the second locking position is an increased fastening state. Therefore, when the first connecting portion 21 and the second connecting portion 31 are alternately applied with abnormally high temperature liquid chemicals and abnormal low temperature for a long period of time, When the pure water is used and the sealing force is lowered to cause liquid leakage, the first locking position and the second locking position are provided, and the second locking position is closer to the annular sealing member. The joining force between the first connecting portion 21 and the second connecting portion 31 can take a quick response when liquid leakage occurs.

(11) The fluid machine connection jig 8 of the above-described connection member 5 according to any one of (1) to (10), wherein the first connecting piece 6 is formed with a second jig on the outer peripheral surface. In the portion 66c, the second connecting piece 7 has the first clamp hooking portion 77 formed on the outer peripheral surface thereof, and the fluid machine connecting jig 8 includes the universal hooking portion 82a that is engaged with the first clamp hooking portion 77, and is engaged with the second clamp. Since the first locking position catching portion 84a and the second locking position catching portion 84b of the hook portion 66c are formed by the fluid machine connecting jig 8, the first connecting piece 6 and the second connecting piece 7 can be made The two connection states of the first locking position and the second locking position.

(12) The fluid machine connection jig 8 used in the above-described connection member 5 according to any one of (1) to (10), characterized in that the fluid machine connection jig 8 is attached to the first connection from the connection member 5 Since the first connecting piece 6 and the second connecting piece 7 are engaged by the insertion of the first connecting piece 6 and the second connecting piece 7 in the same direction in the second connecting portion 31, the work can be performed from only one direction, even if the fluid machine is arranged in parallel. It is also easy to work in a small space and has good workability.

(13) The fluid machine connection jig 8 used in the above-described connection member 5 according to any one of (1) to (10), wherein the fluid machine connection jig 8 is attached to the connection member 5 In addition, since the fluid machine connection jig is attached to the joint member, it is possible to easily confirm from the outside that the tightening state is increased, whereby the tightening state can be found at a glance at the time of maintenance. The fluid machine is also handled and the workability is good.

It should be noted that the present embodiment is merely a simple illustration, and the present invention is not limited at all. Therefore, it is a matter of course that the invention can be variously modified and modified without departing from the spirit thereof.

For example, the T-shaped detachable locking portion 68 is formed on the outer circumference of the first connecting piece 6 of the present embodiment, but the shape of the attaching and detaching locking portion 68 is L-shaped or only 1 as long as the jig 8 can be caught. It can also be.

For example, the chamfered portion 7c is formed on the inner peripheral surface of the second connecting piece 7 of the present embodiment on the surface abutting on the first connecting portion 21 and the second connecting portion 31, but may be the first one. The retracted shape in which the connecting portion and the second connecting portion do not abut may not be a chamfered shape.

For example, the material of the jig 8 may be a fluororesin or a metal such as PTF or PTFE, in addition to a general resin.

For example, the frictional resistance may be generated by the first resistance protrusion 6d contacting the second resistance protrusion 7b, or by the flow path 29, 39 provided in the first hinge portion 63 and the second hinge portion 73. The surfaces perpendicular to the axial direction are in contact with each other.

Further, in the present embodiment, the convex protruding portions 91, 92, 93, 94, and 95 are connected to the connecting side slopes which are the outer peripheral portions of the flange portions 25 and 35 in the first connecting piece 6 and the second connecting piece 7, respectively. The faces 26 and 36 are formed at opposite positions, but may be opposed to the outer peripheral faces 25a and 35a which are the outer peripheral portions of the flange portions 25 and 35 (on both sides of the grip portion 45 of the annular seal member 4 in Fig. 24). The location is formed.

Further, in the present embodiment, the pair of convex protrusions 91, 92, 93, 94, and 95 are provided at the same position in the circumferential direction, but they may be provided differently from each other.

Further, in the present embodiment, the convex protrusions 91, 92, 93, 94, 95 and the connection side slope faces 26, 36 can be deformed with each other, but the convex protrusions 91, 92, 93, 94 can also be used. The hardness of 95 is relatively high so that the deformation amount of the convex protrusions 91, 92, 93, 94, 95 is smaller than that of the connection side slope surfaces 26, 36.

Claims (14)

 A connection member for a fluid machine connection structure, the fluid machine connection structure having: a first fluid device having a first connection portion; a second fluid device having a second connection portion; and the first connection portion and the An annular sealing member between the second connecting portions; and a connecting member that connects the first connecting portion and the second connecting portion via the annular sealing member, wherein the connecting member includes a connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece have a rotation connecting portion at one end thereof; the first connecting portion and the second connecting portion have a circular outer shape; and the first connecting piece is The substantially U-shaped shape having an opening portion is engaged with the second connecting piece over 180 degrees over the entire circumference of the first connecting portion and the second connecting portion.    The connecting member according to the above aspect of the invention, wherein the opening is formed to have a smaller diameter than each of the first connecting portion and the second connecting portion; the first connecting piece is capable of The outer side is deformed so as to expand outward by the difference between the diameter of the opening of the first connecting portion and the second connecting portion.    According to the above-described connection member of the first or second aspect of the invention, the first connecting piece is formed with a thin portion having a cutout portion.    The connecting member according to the first or second aspect of the invention, wherein the first connecting piece and the second connecting piece are formed with a resistance generating portion for preventing rotation due to their own weight; The surface of the inner peripheral surface of the connecting piece that is in contact with the first connecting portion and the second connecting portion has a portion that does not abut against the first connecting portion and the second connecting portion.    The connecting member according to the above-described first or second aspect of the invention is characterized in that the T-shaped or L-shaped detachable locking portion is formed on the outer circumference of the first connecting piece.    The connecting member according to the above-described first or second aspect of the invention is characterized in that the rotating member is formed on the outer circumference of the second connecting piece.    The connecting member according to the first or second aspect of the invention, wherein the first connecting piece is opposed to an outer peripheral portion of the first connecting portion and the second connecting piece is connected to the second connecting piece A convex protrusion is formed at a position opposite to the outer peripheral portion of the portion.    The connecting member according to the seventh aspect of the invention, wherein the second connecting piece is located at a position facing the outer peripheral portion of the first connecting portion and the second connecting piece and the second connecting portion A convex protrusion is formed at a position opposite to the outer peripheral portion.    The connecting member according to Item 1 or 2, wherein the other end of the first connecting piece includes a first locking portion, and the other end of the second connecting piece includes the first locking portion card. a predetermined first locking receiving portion, wherein the connecting member is positioned at a first locking position at which the first locking portion engages with the first locking receiving portion, and the connecting member has a second locking position, When the connecting member is at the first locking position, it is closer to the annular sealing member direction than when the second locking position is at the second locking position.    The connecting member according to the above aspect of the invention of claim 9, wherein the first locking position is a normal use state, and the second locking position is an increased fastening state.    A fluidic device connection jig according to any one of the above-mentioned first aspect, wherein the first connecting piece has a second clamp hooking portion formed on an outer circumferential surface thereof, and the second connecting portion a first jig catching portion is formed on the outer peripheral surface; the fluid machine connecting jig includes: a universal hooking portion that is engaged with the first jig engaging portion; and a first engaging portion of the second jig engaging portion The position fixing hook portion and the second locking position hook portion are locked.    A fluid-machine connection jig according to any one of the above-mentioned claims, wherein the fluid machine connection jig is attached to the first connection portion and the above by the connection member. The second connecting portion is inserted in the same direction, and the first connecting piece is engaged with the second connecting piece.    A fluid machine connection jig for use in the above-described connection member according to any one of claims 1 to 10, wherein the fluid machine connection jig is attached to the joint member to indicate an increase in fastening. status.    A fluid machine connection structure comprising the above-described joint member according to any one of claims 1 to 10.