JPH0712693U - Pipe fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe joint that is easily attachable and detachable and is sufficiently compatible with a piping line through which a high-pressure fluid flows. [Structure] First and second locking balls 6 and 8 are provided at positions near the plug insertion port 4 of the socket body S so as to be retractable inward and outward in the radial direction, and an operating ring 9 is provided on the outer peripheral surface of the socket body S with a spring 1.
It is urged at 0 and installed slidably. On the inner peripheral surface of the operation ring 9, there are provided a first locking ball 6 protruding in the outer radial direction by a bearing surface 24 of the sleeve valve body 16 slidably biased inside the socket body S by a biasing spring 17. Relief groove 11 to engage
And, a relief portion 12 for releasing the restraint of the second locking ball 8 in the outer diameter direction is provided. On the other hand, in the plug portion 30 of the plug body P, first and second locking grooves that engage with the first and second locking balls 6 and 8 are formed along the longitudinal direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint that can be applied to high-pressure fluid by arranging locking members in multiple rows.

[0002]

[Prior art]

 Normally, a pipe joint consists of a socket body and a plug body.A series of tapered holes are formed near the plug insertion port of the socket body, locking balls are provided in each taper hole, and then the locking balls are locked. Alternatively, an operating ring for releasing is slidably attached near the plug insertion opening via a biasing spring. On the other hand, a lock groove with which the lock ball is engaged is formed in the body of the plug body. Then, when the plug body is inserted into the socket body, the operation ring of the socket body regulates the movement of the locking ball in the centrifugal direction and engages with the locking groove of the plug body, so both sides are locked and ready for use. It will be in a state of being. Also, when the operating ring of the socket body is slid, the locking ball provided on the socket body can move in the centrifugal direction, the engagement from the locking groove of the plug body is released, and both locks are released. It In these cases, if valves are provided on the socket or plug, these valves will be opened and closed automatically.

[0003]

[Problems to be solved by the device]

 However, the pipe joint configured as described above does not cause any inconvenience when the pressure of the applied fluid is low. Normally, a force that pulls the socket body and the plug body away from each other is applied to the pipe joint due to the pressure of the fluid, but when the pressure of the fluid increases, this force becomes extremely large. Such force acts as a surface pressure on the engagement surface between the locking groove of the plug body and the locking ball of the socket body.

For example, when the pipe joint as described above is used in a high-pressure piping line where the fluid pressure is as high as 350 Kgf / cm ² or more, the surface pressure applied to the locking ball becomes large and the locking groove of the plug body is increased. There is a problem that sagging (plastic deformation due to high surface pressure of the locking ball) occurs at the edge on the surface pressure side. Further, the sagging of the locking groove of the plug body has a problem that the operation ring cannot slide and the socket body and the plug body cannot be attached and detached. As a means for preventing sagging in such a locking groove, a large number of locking balls may be arranged in the socket body to reduce the surface pressure per locking ball. However, in order to provide a large number of locking balls, it is necessary to form a large number of tapered holes in the socket body, and as a result, the strength of the members that make up the socket body is reduced. Even if it is provided, there is a limit naturally.

The present invention has been developed in view of the problems of the conventional example, and an object of the present invention is to provide a high-pressure fluid flow while having the same easy detachability as in the past. An object of the present invention is to provide a pipe joint that can sufficiently cope with the piping line that is used.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in a pipe joint in which a locking member provided in a socket main body is engaged with a locking groove formed in a plug main body for connection, a first locking member is provided on the plug insertion side of the socket main body. A second locking member is provided so as to be retractable inward and outward in the radial direction, and an operation ring biased by a spring toward the plug insertion side is slidably provided on the outer peripheral surface of the socket body. On the surface, there is a relief groove that engages with a first locking member that projects in the outer diameter direction by a sliding member that is urged to slide inside the socket body by an urging spring, and the first locking is provided in the relief groove. And a relief portion for releasing the restraint of the second locking member in the outer radial direction when the members are engaged, while the first locking member and the second locking member are provided on the outer periphery of the plug body. The first locking groove and the second locking groove that engage with each other are formed along the longitudinal direction. It has a structure which is characterized.

[0007]

[Action]

 Since the present invention is configured as described above, when connecting the socket body and the plug body, by inserting the plug body and further pushing the plug body, the first locking member can engage with the first locking groove. At the same time, the second locking member can also engage with the second locking groove. The operating ring is elastically urged toward the adapter side of the socket body by the first locking member that projects in the outer diameter direction by the sliding member provided inside the socket body, and the plug body is inserted and the first ring of the plug body is inserted. 1 When engaged with the locking groove, the first locking member becomes free in the inner diameter direction and the engagement with the relief groove formed on the inner peripheral surface of the operating ring is released, and immediately elastically returns to the plug connection side. To do. At this time, the first locking member is released from the sliding member, but the projecting state is maintained by the outer peripheral surface of the plug body until it reaches the first locking groove. When the operating ring slides toward the plug connection side, the first locking member engages with the first locking groove of the plug body and the second locking member engages with the second locking groove of the plug body to lock. Therefore, both the socket body and the plug body can be connected easily and securely.

In this case, the pressure of the fluid acting on the socket body and the plug body is distributed to the first locking member and the second locking member, and the surface pressure per one of the locking members provided in the socket body is reduced. be able to. Therefore, since it is possible to prevent the locking groove of the plug body from being sagged, it is possible to apply a pipe joint with easy operability to a piping line through which high-pressure fluid flows.

Next, when both are to be separated, first, the operating ring of the socket body is slid to the original position, the first locking member engages with the escape groove of the operating ring, and the second locking member is moved. Is located in the escape area of the operation ring. In this state, the engagement of the locking member of the socket main body is released from the locking groove of the plug main body, so that the plug main body can be pulled out from the socket main body, and both can be reliably separated. At this time, since the sliding member provided inside the socket body slides toward the plug side by the biasing spring, the first locking member projects outward in the radial direction by the sliding member, and the operating ring is formed on the operating ring. It is retained on the adapter side of the socket body because it engages with the escape groove.

[0010]

Embodiment An embodiment of the pipe joint of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the socket body S. A plurality of first taper holes 5 are formed in the socket body S in the vicinity of the plug insertion port 4 of the main cylinder 1, and each first taper hole 5 has a first taper hole 5. A first locking ball 6 as a first locking member is provided so as to be retractable in the inner and outer diametrical directions, and further, a plurality of second tapered holes are provided on the plug side in parallel at a position spaced apart from the first tapered hole 5 by a predetermined distance. 7 is formed, and each second taper hole 7 is provided with a second locking ball 8 which is a second locking member so as to be retractable in the inner and outer radial directions.

On the outer peripheral surface of the main cylinder 1, an operation ring 9 for restricting or releasing the movement of the first and second locking balls 6, 8 in the outer diameter direction is slid at a distance to the stop ring 15. The operation ring 9 is movably and rotatably provided on the main cylinder 1. The operation ring 9 is biased toward the plug by a spring 10. An escape groove 11 is formed on the inner peripheral surface of the operating ring 9 to allow the first locking ball 6 to move in the outer diameter direction, and a first groove for restricting the movement of the first locking ball 6 in the outer diameter direction is formed. 1 restriction surface 13 and a second restriction surface 14 for restricting the movement of the second locking ball 8 in the outer diameter direction are formed, and the second locking ball 8 is provided at the plug-side end of the operating ring 9. An escape portion 12 is formed to allow the outer peripheral surface to move in the radial direction. Then, the socket body S is constructed by screwing the adapter 2 having the inner tubular portion 3 in which the fluid passage 22 is formed, to the rear end portion of the main tubular body 1. The first locking ball 6 and the second locking ball 8 may be arranged in parallel, but as shown in FIG. 4, the first locking ball 6 and the second locking ball 8 may be arranged alternately. More preferable.

The pipe joint in this example has a structure in which a valve is incorporated in the socket body S, and the sleeve valve body 16 is slidably inserted into the inner cylinder portion 3 of the adapter 2 via the biasing spring 17. ing. The sleeve valve body 16 is biased toward the plug insertion port 4 side by the biasing spring 17 when the adapter 2 is screwed to the rear end portion of the main cylinder 1, but It is configured to be locked by the formed engaging portion 23 and to close the flow passage port 22a which communicates with the flow passage 22 of the inner cylindrical portion 3 on the inner peripheral surface of the sleeve valve body 16. The sleeve valve body 16 also serves as a sliding member for connecting the pipe joints with one touch. As a result, when the socket body S and the plug body P of the pipe joint are separated from each other, the first locking ball 6 projects outward in the radial direction by the support portion 24 of the sleeve valve body 16 and engages with the escape groove 11 of the operating ring 9. It remains in a matched state. An O-ring 18 and a backup ring 19 are arranged on the inner peripheral surface of the sleeve valve body 16 to prevent fluid leakage from the flow passage port 22a of the sleeve valve body 16. Further, the sleeve valve body 16 is formed with a plug receiving portion 20.

On the other hand, FIG. 2 shows the plug body P. In the plug body P, the plug portion 30 is integrally formed in the front portion of the body portion 45 to form a fluid passage 31 therethrough, and the first locking groove 32 and the first locking groove 32 are formed so as to circulate the plug portion 30. A second locking groove 33 is formed at a position separated from the first locking groove 32 by a predetermined distance. The tip portion 41 of the plug portion 30 is formed in a shape that engages with the plug receiving portion 20 of the sleeve valve body 16 of the socket S described above. Further, step portions 34, 34 are formed on the edges of the first locking groove 32 and the second locking groove 33 on the surface pressure side, respectively, and when the first and second locking grooves 32, 33 are sagged, the plug portion It is prevented from protruding from the outer peripheral surface of 30.

In this embodiment, a valve is incorporated in the plug body P as well. According to this, the slide valve body 35 is inserted from the rear of the plug body P, then the supporter 38 is inserted through the urging vane 36, and the stop ring 37 locks the supporter 38 to lock the slide valve. The body 35 is locked to a locking portion 44 formed on the inner peripheral surface of the plug portion 30 to close the flow passage port 35a communicating with the flow passage 31 of the plug portion 30. An O-ring 39 and a backup ring 40 are arranged on the inner peripheral surface of the plug portion 30 to prevent fluid leakage from the flow passage port 35a of the slide valve body 35.

In the above, the types of valves incorporated in the socket body S and the plug body P are not limited to those of this embodiment. Further, whether or not to incorporate the valve into the socket body S and the plug body P is arbitrary depending on the implementation, and in this case, either one-way open / close type or both-way open / close type may be used. When the socket main body S is provided with no valve, it is necessary to provide a sleeve-shaped sliding member having an appropriate shape, for example, a bearing surface 24, instead of the sleeve valve body 16.

Next, the operation of this embodiment will be described. Since the pipe joint of this embodiment is a double-way open / close type in which valves are incorporated in both the socket body S and the plug body P, the valves of the socket body S and the plug body P are closed when they are separated. Has been done. In this state, the operating ring 9 of the socket body S is slid in the plug insertion direction even though it is biased toward the plug side by the spring 10, and the second locking ball 8 has inner and outer diameters. It is freely retractable in the direction and is waiting for the insertion of the plug body P. That is, the first locking ball 6 is supported on the inside by the bearing surface 24 provided on the tip side of the sleeve valve body 16 and on the outside by being engaged with the escape groove 11 of the operation ring 9 for operation. The ring 9 has stopped sliding, and the sleeve valve body 16 inserted into the inner cylinder portion 3 of the adapter 2 of the socket body S is attached to the plug insertion port 4 side by the urging spring 17. The flow passage port 22a that is urged to communicate with the flow passage 22 of the inner tubular portion 3 is closed. The sleeve valve body 16 is abutted and locked by an engaging portion 23 formed on the inner peripheral surface of the main cylinder 1.

On the other hand, when the plug body P is separated from the socket body S, the slide valve body 35 is urged toward the socket by the urging spring 36. In this case, the slide valve body 35 is engaged with the engaging portion 44 formed on the inner peripheral surface of the plug portion 30, and the flow passage port 35a communicating with the flow passage 43 of the plug portion 30 is closed.

Next, when the socket body S and the plug body P in the above-mentioned state are connected, the state shown in FIG. 3 is obtained, and the valves incorporated in both of them are opened to form the flow path 43, The fluid can be distributed. Specifically, the plug portion 30 of the plug body P is inserted into the plug insertion port 4 of the socket body S, the tip portion 41 of the plug portion 30 is engaged with the plug receiving portion 20 of the sleeve valve body 16, and the plug body P When the front end surface 42 of the slide valve body 35 is brought into contact with the front end surface 21 of the inner cylindrical portion 3 of the socket main body S, and the plug main body P is further pushed in, the front end portion 41 of the plug portion 30 is moved to the plug receiving portion. The sleeve valve body 16 is pushed in via the urging force of the urging spring 17, and the tip surface 21 of the inner cylindrical portion 3 of the socket body S urges the slide valve body 35 of the plug body P. The flow path 43 is formed by pushing it against the urging force of the spring 36, and the flow path 22 of the socket body S and the flow path 31 of the plug body P are in communication with each other. Immediately before connecting the socket body S and the plug body P, the tip end portion 41 of the plug portion 30 and the plug receiving portion 20 of the sleeve valve body 16 are in contact with each other in a shape that completely matches each other. At the time of connecting the main body P, there is no possibility that air, which adversely affects the operation of the hydraulic line, is mixed in, and the connection can be made in a so-called airless state.

In this way, when the plug portion 30 of the plug body P is completely inserted into the plug insertion port 4 of the socket body S, the flow paths 22 and 31 of the both communicate with each other via the flow path 43 as described above. At the same time, the first locking ball 6 is released from the movement restriction in the inner diameter direction by the plug receiving portion 20 of the sleeve valve body 16 and can be engaged with the first locking groove 32. At the same time, the second locking ball 8 is also It becomes possible to engage with the second locking groove 33. When the first locking ball 6 is movable in the inner diameter direction, the first locking ball 6 is disengaged from the escape groove 11 formed on the inner peripheral surface of the operation ring 9.

The operating ring 9 provided on the outer peripheral surface of the socket body S is immediately repelled by the spring 10 toward the plug side when the plug body P is completely inserted as described above, and moves to the plug connecting side. To do. When the operation ring 9 moves to the plug side, the positions of the clearance groove 11 and the clearance portion 12 formed on the inner peripheral surface and the end of the operation ring 9 also move to the plug side, and the first restriction surface 13 of the operation ring 9 moves to the first position. (1) The movement of the locking ball 6 in the outer diameter direction is regulated, and the second regulating surface 14 regulates the movement of the second locking ball 8 in the outer diameter direction. As a result, the first locking ball 6 projects in the inner diameter direction and engages with the first locking groove 32, and the second locking ball 8 also projects in the inner diameter direction and engages with the second locking groove 33 to be locked. Both the socket body S and the plug body P are securely connected. In this case, the above-mentioned operations are simultaneously and instantaneously performed.

The tensile load exerted on the socket body S and the plug body P connected in this way by the high pressure of the fluid acting on the both bodies is different from the surface pressure applied to the first locking ball 6 and the second locking ball 8, respectively. Since it is possible to reduce the surface pressure per one of the locking balls that are dispersed and provided in the socket main body S, it is easy to operate even in a piping line through which a high pressure fluid of about 700 kgf / cm ² flows. Can be applied. In the case of the present embodiment, since the step portions 34, 34 are formed on the surface pressure side of the first and second locking grooves 32, 33, the edges of the first and second locking grooves 32, 33 do not sag even if the surface pressure is applied. It does not project to the outer peripheral surface of the plug.

The socket body S and the plug body P are separated from each other by pulling the operation ring 9 toward the rear end portion of the socket body S against the biasing force of the spring 10. Then, the first and second restricting surfaces 13 and 14 of the operating ring 9 that restrict the movement of the first and second locking balls 6 and 8 in the outer diameter direction move, and the first and second locking balls Since the escape groove 11 and the escape portion 12 move onto the recesses 6 and 8, the restriction on the movement of the first and second locking balls 6 and 8 in the outer diameter direction is released, and the socket body S and the plug body P are separated. The lock is released.

At this time, the socket main body S and the plug main body P of the present embodiment incorporate a double-way open / close type valve, and the sleeve valve body 16 and the slide valve body 35 provided respectively for them are returned to the former position. Act on. That is, the sleeve valve body 16 of the socket body S is urged by the urging spring 17 to push the plug body P outward, and the slide valve body 35 of the plug body P is urged by the urging spring 36. The distal end surface 21 of the inner cylindrical portion 3 of the socket body S operates so as to be pushed outward. As a result, the plug body P is separated from the socket body S, and at the same time, the sleeve valve body 16 of the socket body S is moved by the biasing spring 17 to the engaging portion 23 formed on the inner peripheral surface of the main cylinder 1, The flow passage port 22a communicating with the flow passage 22 of the inner cylinder portion 3 is closed, while the slide valve body 35 of the plug body P is also formed with an urging spring 36 on the inner peripheral surface of the plug portion 30. The flow path port 35a communicating with the flow path 43 of the plug portion 30 is closed.

When the sleeve valve body 16 of the socket body S is returned to the old position, the bearing surface 24 of the plug receiving portion 20 formed on the sleeve valve body 16 has the inner diameter of the first locking ball 6 as described above. Regulate movement in the direction. As a result, the first locking ball 6 projects in the outer diameter direction, engages with the escape groove 11 formed in the operation ring 9, and prevents the operation ring 9 from returning to the plug side, and the operation ring 9 of the socket body S is blocked. Is stopped while sliding in the plug insertion direction. In this case, the above-mentioned operations are simultaneously and instantaneously performed, and the fluid does not leak from the socket body S or the plug body P.

[0025]

[Effect of device]

 As is clear from the above description, according to the pipe joint of the present invention, the socket body is provided with the plurality of first and second locking members, and the first and second locking grooves are formed on the outer peripheral surface of the plug body. By engaging the locking member with each locking groove and locking each by locking the movement of each locking member with the operating ring, the surface pressure applied to the locking member is dispersed to the locking groove of the plug. This prevents sagging and prevents the socket body and plug body from becoming detachable. Therefore, the pipe joint of the present invention has an excellent effect that it can be used in a piping line in which a wide range of fluid flows from low pressure to high pressure.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a socket body of an embodiment of a pipe joint according to the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the plug body of this embodiment.

FIG. 3 is a cross-sectional view showing a connection state between a socket body and a plug body.

4 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 4 Plug Insertion Port 6 First Locking Ball 8 Second Locking Ball 9 Operating Ring 10 Spring 11 Escape Groove 12 Escape Part 17 Biasing Spring 24 Bearing Surface 32 First Locking Groove 33 Second Locking Groove P Plug Main Body S Socket Body

Claims (1)

[Scope of utility model registration request] 1. A pipe joint for connecting a locking member provided on a socket body by engaging with a locking groove formed on a plug body, wherein a first locking member and a second locking member are provided on a plug insertion side of the socket body. Is provided so as to be retractable in the inner and outer radial directions, and an operation ring biased by a spring toward the plug insertion side is slidably provided on the outer peripheral surface of the socket body, and the socket body is provided on the inner peripheral surface of the operation ring. When the first locking member engages with the relief groove that engages with the first locking member that protrudes in the outer diameter direction by the sliding member that is slidably biased inside by the biasing spring, A relief portion for releasing the restraint of the second locking member in the outer diameter direction is provided, while a first locking groove and a first locking groove for engaging the first locking member and the second locking member are provided on the outer periphery of the plug body. (2) A pipe joint characterized in that a locking groove is formed along the longitudinal direction.