JPH0616205Y2 - Sockets and plugs for pipe fittings, and pipe connection systems using these - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to pipes, particularly pipes fixed to a wall surface,
The present invention relates to a pipe joint socket and a plug suitable for connecting a gas water heater and the like, and a pipe connection system using the socket and the plug.

[Conventional technology]

Conventionally, flexible hoses and union nuts have generally been used to connect pipes for attaching appliances such as gas water heaters, gate valves, and cocks.

[Problems to be solved by the device]

However, as in the case of a gas water heater, in the case of connecting the water pipe and the gas pipe, it is not easy to align the connection position with the pipe already fixed to the wall surface.
Moreover, since it is necessary to install gate valves and cocks, a lot of time is spent on setting mounting positions and tightening work.

In addition, due to the difficulty of direct connection described above, flexible hoses, rubber hoses, lead pipes, etc. have been used in the past, but in recent years even gas water heaters are regarded as part of the system kitchen in the same way as furniture furniture. Then, there is also a problem that the value of the system kitchen is reduced to half due to the poor appearance of the connection between the pipes.

The present invention has been made in view of the above problems, and facilitates the connection of pipes and the opening / closing operation of valves, and the operability of pipe joints.
The issue to be solved is to improve safety.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention movably holds a lock ball engaging and disengaging with a circumferential groove formed on the outer peripheral surface of a plug main cylinder in a centripetal direction, and centering the lock ball on the outer peripheral surface. Direction, and a socket main cylinder body in which a lock ball operating cylinder having a gap that enables movement in the centrifugal direction is slidably fitted in the axial direction, and a shaft at an appropriate position in the socket main cylinder body. A valve seat is provided at an opening tip end portion that is brought into contact with and separated from a valve body that is arranged with its core aligned with the axis of the socket main cylinder.
In a socket of a pipe joint comprising an inner cylinder body slidably provided in the socket main cylinder body, the inner cylinder operation cylinder for sliding the inner cylinder body by a rotating operation is the socket main cylinder body. The outer peripheral surface of the body is fitted in a column so that it can be brought into close contact with and separated from the lock ball operation cylinder, and the outer peripheral surface of the socket main cylinder is on the lock ball operation cylinder side at the opposing end surfaces of both operation cylinders. The L-shaped opening groove that guides the operation cylinder lock pin that is provided on the inner side of the inner cylinder operation cylinder side is provided with the opening that allows the operation cylinder lock pin that is out of the L-shaped opening groove to enter. The base of the plug cylinder inserted into the pipe joint socket as a pipe joint plug,
With a cap nut screwed on the outer periphery, it is integrally connected to the adapter,
A means in which an elastic ring is fitted to the connecting surface of the plug cylinder and the adapter so that the plug cylinder can be swung is adopted, and the pipe connection system is provided along a wall surface or partition or inside the wall or the like. The fixed pipe ends and / or their branch pipes are directed upwards, and the pipe joint sockets are fixed to the end parts of these fixed pipes with the plug insertion holes facing upwards, while hot water such as a gas water heater is supplied. The plug is fixed to the end of the fluid flow port of the equipment with the tip facing downward, and the plug on the equipment side is connected to the socket by dropping it from above to achieve the intended purpose. Is.

[Action]

In order to connect the socket of claim 1 and the plug of claim 2, first, the lock ball operating cylinder is slightly rotated to engage the L-shaped opening groove of the lock ball operating cylinder with the operation tube lock pin to lock the lock ball operating cylinder. The plug is inserted with the ball operating cylinder in the unlocked position, the lock ball of the socket is aligned with the ball circumferential groove of the plug, and the lock ball operating cylinder is rotated in the opposite direction. By operating the lock ball operating cylinder, the locked state between the operating cylinder lock pin and the L-shaped opening groove is released, the lock ball operating cylinder is released from the locked state, and the connection between the socket and the plug is completed. When the internal cylinder operating cylinder is rotated in this connected state, the internal cylinder slides to the valve body open position, separates the valve seat from the valve body, and opens the fluid passage. At this time, a slight misalignment between the socket and the plug is absorbed by the elastic O-ring provided on the connecting surface between the plug and the adapter.

〔Example〕

The socket and plug of the present invention will be described below with reference to the embodiments shown in FIGS. 1 (a), (b), 2 (a), (b) and 3.

Reference numeral 1 is a socket, 10 is a socket main cylinder of the socket 1, 2 is a plug, and 32 is a plug cylinder. A male screw 102 is cut on the plug cylinder body insertion end side of the socket main barrel 10, and a male screw 102 has a nut. 27 is screwed and fitted and fixed to a positioning plate 271 which is appropriately fixed to a wall surface or the like. Further, in the outer peripheral surface portion of the socket main cylindrical body 10 at the lower part thereof on the plug cylindrical body insertion end side, several tapered holes 101 having a large outer peripheral surface side and a small inner peripheral surface side are equally spaced. It is provided. Further, a lock ball 12 is inserted into the tapered hole 101 so as to be retractable in the centripetal direction, and a lock ball operation cylinder 13 mounted on the outside of the socket main cylinder body 10 is provided with a compression coil spring 19.
When the lock ball 12 is biased by the lock ball 12, the lock ball 12 is brought into a locked state (FIG. 3). A lock pin 14 is planted at a proper position on the outer peripheral surface of the socket main cylinder 10 to which the lock ball operation cylinder 13 is attached.This lock ball operation cylinder 13 resists the elastic force of the compression coil spring 19. The lock ball operating cylinder 13 can be held in an unlocked state by axially moving the lock ball operating cylinder 13 and hooking the L-shaped opening groove 131 formed in the lock ball operating cylinder 13 on the lock pin 14. ing.

Substantially S-shaped holes 103 are formed symmetrically at two positions on the outer wall of the socket main barrel 10 below the region where the lock pin 14 is planted.

Reference numeral 11 denotes a connecting cylinder, and a male screw 111 for connecting to another pipe is formed on the outer periphery of the small diameter portion formed in two steps, and a female screw is formed on the inner side of the large diameter portion. It is screwed with a male screw formed on the outer peripheral surface of the socket main cylindrical body 10 below the S-shaped hole 103. In the screwed portion, the outer peripheral surfaces of the connecting cylinder 11 and the main cylinder 10 are flush with each other. Further, in the circumferential groove 113 formed near the center of the outer periphery of the connecting cylinder 11, a stop ring (split ring) 28 for determining the most retracted position of the inner cylinder operating cylinder 17 is attached. 112 is another circumferential groove provided in the connecting cylinder 11 in parallel with the fitting circumferential groove 113 of the stop ring 28 for fixing the stop ring 28 to another position. The stop ring 28 is fitted into the circumferential groove 112 when the operating cylinder 17 is maintained in the restrained state, and is fitted into another circumferential groove 113 when releasing the operating cylinder 17.

Reference numeral 15 denotes an internal cylinder, which is arranged inside the socket main cylinder 10 so as to be slidable on the axis of the socket main cylinder 10. O-ring grooves 153 and 154 are formed on the outer periphery of the inner cylindrical body 15 in the vicinity of both end surfaces, and O-rings 161 and 162 are attached to the O-ring grooves 153 and 154, respectively. Further, a groove 152 into which the tips of the operation screws 181 and 182 are inserted is formed in the outer circumference near the center in the circumferential direction. When the plug cylinder 32 is inserted, a ring packing 25 that seals around the front end of the plug cylinder 32 is fitted to the plug cylinder insertion end side of the internal cylinder 15. A guide cylinder 20 is fixed inside the inner cylinder 15 with a stop ring 22 interposed. A valve shaft 21 is attached to the through hole of the guide cylinder 20 coaxially with the inner cylinder 15, and is slidable in the inner cylinder 15 in the axial direction. A ring packing 24 is fitted on the large-diameter valve head of the valve shaft 21. Since the compression coil spring 23 urges the valve shaft 21 toward the plug cylinder body insertion end side with respect to the guide cylinder 20, the ring packing 24 is seated on the inner wall 151 of the inner cylinder body 15 serving as a valve seat. However, the distribution hole is blocked. However, when the tip 211 of the valve shaft 21 extending in the direction of the plug insertion end is pressed against the elastic force of the compression coil spring 23, the ring packing 24 separates from the valve seat and the flow hole is opened. . Reference numeral 17 denotes an internal tubular operation tube, which can slide on the outer peripheral surfaces of the main tubular body 10 and the connection tube 11 between the lock ball operation tube 13 and the connection tube 11 and faces the end surface of the lock ball operation tube 13. Are fitted together. The end surface portion of the inner cylinder operating cylinder 17 is a lock ball operating cylinder.
When 13 is locked by the lock pin 14,
It can be brought into contact with the end surface portion of the operation tube 13. When the lock ball operating cylinder 13 is separated from the lock pin 14 and is in the unlocked state, the inner cylinder operating cylinder 17 is not affected by the lock pin 14 exposed on the outer peripheral surface of the socket main cylindrical body 10 and A part of the end surface portion of the inner tubular body operating cylinder 17 facing the lock ball operating cylinder 13 is cut off as a lock pin entry opening 171 so as to be movable to the operating cylinder 13 side. In addition, the internal cylinder operating cylinder 17 has a screw hole 171.
The operation screws 181 and 182 are screwed into the screw holes 171, and the tips of the operation screws extend through the substantially S-shaped hole 103 of the socket main cylindrical body 10 into the inside of the socket main cylindrical body 10. It is engaged with the groove 152 of the cylindrical body 15.

Next, the plug 2 will be described.

The plug 2 is composed of a plug cylinder 32, an adapter 30, and a cap nut 33. A female screw for connecting to another pipe is cut inside the base of the adapter 30, and circumferential grooves 301 and 302 are formed in parallel on the outer circumference of the small diameter portion 322 on the opposite side, and O-rings 311 and 312 are fitted into them. ing. Further, a male screw is formed on the outer periphery of the central portion 323 of the adapter 30. The plug cylinder 32 is externally fitted to the small diameter portion 322 into which the O-rings 311 and 312 of the adapter 30 are fitted, a valve pushing wall having a through hole 324 is formed at the tip end surface portion, and the socket 1 is connected to the outer peripheral surface in the vicinity thereof. Circumferential groove for ball lock for
321 is formed. The cap nut 33 is screwed onto the male screw of the central portion 323 of the adapter 30, and the plug cylinder 32 is attached to the O-ring 3.
It is held so that it can move axially within the range sealed by 11,312. Further, a valve mechanism may be provided inside the plug cylinder 32 of the plug 2 as necessary, and the valve mechanism may be pressed against the valve shaft 21 on the socket 1 side to open the flow hole.

Next, the connection / separation operation of the socket and the plug of this embodiment will be described.

The lock ball operating cylinder 13 is lowered in FIG. 1 against the resilient force of the compression coil spring 19 of the socket 1, and the lock ball operating cylinder 13 is slightly rotated rightward in FIG. It is locked in the L-shaped opening groove 131 provided in the end surface portion of the operation tube. In this state, the plug cylinder 32 of the plug 2 is inserted into the socket main cylinder 10 of the socket 1 so that the lock ball 12 provided in the socket 1 and the circumferential groove 321 formed in the plug 2 are aligned with each other, and then the lock is performed. When the lock ball operating cylinder 13 is released from the lock pin 14 by slightly rotating the ball operating cylinder 13 to the left in FIG. As shown in FIG. 4, the lock ball 12 is slid upward and pressed by the inner peripheral surface of the operating cylinder 13, and is fixed by the stop ring 29 on the other side. As a result, the movement of the lock ball 12 in the centrifugal direction is blocked and the connection between the socket 1 and the plug 2 is completed. At this point, the fluid circulation hole of the socket 1 is not opened.

Next, when the inner cylinder operating cylinder 17 is rotated, the operating screws 181,
Since the 182 moves along the substantially S-shaped hole 103 formed in the main tubular body 10, the internal tubular body operating barrel 17 and the internal tubular body 15 which are engaged via the operating screws 181, 182 are simultaneously plugged into the plug barrel. Move to the body insertion end side. As the inner cylinder 15 moves, the tip 211 of the valve shaft 21 comes into contact with the valve pushing wall at the tip of the plug cylinder 32, and when the inner cylinder 15 further moves, the valve shaft 21 repels the compression coil spring 23. Against this, the ring packing 24 is pushed toward the guide cylinder 20 side and separates from the valve seat 151 to open the flow hole. In the case where the plug 2 has a valve mechanism, the valve shaft 21 and the valve mechanism press each other to open both flow holes. At this time, the lock pin 14 is located in the lock pin entry opening 171 of the inner tubular body operating barrel 17, the end face of the operating barrel 17 contacts the end face of the lock ball operating barrel 13, and the operating screw 181
Is located in the parallel portion of the substantially S-shaped hole 103 and maintains the flow hole in an open state. To maintain this state stably, the stop ring 28 fitted in the circumferential groove 113 is It moves and fits in another adjacent circumferential groove 112, and this stop ring 28 fixes the inner cylinder operating cylinder 17 at the position shown in FIG. Even if the plug 2 is to be separated from the socket 1 in this state, the inner cylinder operating cylinder 17 is completely locked so that the lock ball operating cylinder does not move backward, and functions as a safety stopper. Further, when the lock pin 14 is engaged with the lock ball operating cylinder 13, the lock ball operating cylinder 13 is in a state of being restrained by the lock pin 14, and the operating cylinder 13 has an internal cylindrical body operating cylinder 17 Of the internal cylinder 15 remains in the lowered position shown in FIG. 3 and the valve shaft 21 is not operated, so that the flow hole is kept closed. Will be.

Further, in the process of connecting the socket 1 and the plug 2, even if the socket 1 and the plug 2 are slightly deviated from each other in the axial center, in this case, the O-ring 311 built in the plug 2 is
The 312 absorbs the misalignment of the shaft center and does not hinder the connection.

Next, when disconnecting the connected pipe joint, first, the internal cylinder operating cylinder 17 is rotated in the direction opposite to that at the time of connection. By this rotation, the inner cylinder operating cylinder 17 and the inner cylinder 15 are guided by the operating screws 181, 182 and retract, and the ring packing 24 of the valve shaft 21 provided in the inner cylinder 15 is compressed by the compression coil. The spring force of the spring 23 causes the valve seat 151 to be seated again to close the flow hole. Continuing, lockball operation tube
When 13 is retracted against the elastic force of the compression coil spring 19 and the L-shaped opening groove 131 is locked to the lock pin 14,
Since the lock ball operating cylinder 13 releases the lock of the lock ball 12, the lock ball 12 is locked to the circumferential groove 321 of the plug 2.
The plug 2 is unlocked, and the plug 2 can be easily separated from the socket 1.

Next, a pipe connection system using the socket 1 and the plug 2 of the present invention will be described with reference to FIGS. 5 (a) and 5 (b).

Gas pipes that are pre-fixed to the wall surface etc. according to the installation position of the gas introduction terminal, tap water introduction terminal, hot water supply terminal of the hot water supply equipment 3
5, the socket 1 is preliminarily attached to the open ends of the water supply pipe 36 and the hot water supply pipe 37 in an upward direction. In this case, the positioning plate 271 may be used for positioning. On the other hand, the plug 2 is attached downward to each of the three terminals of the hot water supply apparatus to be attached, for example, the gas water heater 100. If the plug 2 of the water supply and hot water supply port has a built-in valve mechanism, water leakage does not occur even if the gas water heater 100 is once used and then removed. Next, the sockets 1 are all unlocked, that is, the lock pin 14 is engaged with the L-shaped opening groove 131 of the lock ball operating cylinder 13, and the gas water heater 100 is lowered to the gas water heater 100 side. The plugs 2 are inserted into the sockets 1 all at once. Next, each socket 1 is locked, that is, the lock pin 14 is released from the locking of the L-shaped opening groove 131, and the lock ball 12 is engaged with the circumferential groove 321 of the plug 2 to make the pipe joint. Closes the connection. Subsequently, the internal water cylinder operating cylinder 17 of each socket 1 is sequentially rotated to open the valve of each socket 1, and the gas water heater 100 can be used.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

When connecting the socket and plug, releasing the lock ball and returning to the locked state after connection to complete the connection of both is no different from the conventional pipe joint, but the lock that controls the action is The internal cylinder operating cylinder provided so as to face the ball operating cylinder can restrict the movement of the lock ball operating cylinder during connection and operate the built-in valve mechanism only in the connected state to open the flow hole. Moreover, the internal cylinder operating cylinder keeps the built-in valve mechanism closed in the original position, preventing inadvertent operation of the lock ball operating cylinder when connecting the socket and plug, and operating the built-in valve mechanism when removing. It is possible to completely prevent the leakage of fluid such as gas by making it impossible.

Further, by preliminarily attaching the pipe joint of the present invention to each pipe, equipment such as a gas water heater can be easily attached to the pipe with one touch. Further, even if the pipes are slightly decentered from each other, they can be connected without any problem. Therefore, even if piping is made at relatively narrow intervals, the connection operation is easy, and since it has the safety function as described above, it does not cause fluid leakage due to carelessness, safety, workability, and reliability. It is highly likely.

[Brief description of drawings]

The drawing shows one embodiment of the present invention, which is shown in FIG.
(b) is a front view showing a state where the socket and the plug are separated from each other, with their axes aligned, and FIGS. 2 (a) and 2 (b) are the same quarter cut front views, FIG. 3 is Fig. 4 Front view of the socket with the plug connected and the lock ball locked, Fig. 4 Socket and plug connected,
FIG. 5 (a) and FIG. 5 (b) are front views of the pipe connection system of the present invention showing a state in which the valve of the socket is opened.
It is the front view and side view which show an Example. 1 ... Socket, 2 ... Plug, 10 ... Socket main barrel, 12 ... Lock ball, 13 ... Lock ball operating barrel, 14 ... Lock pin, 15 ... Inner barrel, 17 ... Inner barrel barrel, 19,23 ... Compression coil spring, 20… guide cylinder, 21… valve shaft, 22,28,29… stop ring, 24,25… ring packing, 27… nut, 30… adapter, 32… plug cylinder, 33… cap nut, 35 … Gas pipe, 36… Water supply pipe, 37… Hot water supply pipe, 100… Water heater, 161,162,311,312… O-ring, 181,182… Operating screw, 321… Circumferential groove.

Claims (3)

[Scope of utility model registration request] 1. A lock ball (12) which engages and disengages with a circumferential groove (321) formed on an outer peripheral surface of a main plug cylinder (30) is movably held in a centrifuging direction, and the lock is provided on the outer peripheral surface portion. A socket main cylinder body (10) in which a lock ball operation cylinder (13) having a surface that presses the ball (12) in the centripetal direction and a gap that allows movement in the centrifugal direction is slidably fitted in the axial direction. , The socket main cylinder (1
(0) has a valve seat at an opening tip portion at an appropriate position in the opening main body, which comes into contact with and separates from a valve body arranged with its axial center aligned with the axial center of the socket main cylinder (10). A socket for a pipe joint, comprising an inner cylinder (15) slidably provided in the cylinder (10), wherein the inner cylinder (15) is slid by a rotating operation. The operation cylinder (17) is fitted to the outer peripheral surface of the socket main cylinder (10) in close proximity to and in contact with the lock ball operation cylinder (13) in a column so as to be separable, and the opposite end faces of both operation cylinders In the part, an L-shaped opening groove (131) for guiding the operation cylinder lock pin (14) protruding from the outer peripheral surface of the socket main cylinder on the lock ball operation cylinder side,
Sockets for pipe fittings, each of which is provided with an opening (171) on the inner cylinder operating cylinder (17) side, into which the operating cylinder lock pin (14) protruding out of the L-shaped opening groove (131) enters. 2. The adapter (30) is fitted with a cap nut (33) screwed onto the outer periphery of the base of the plug cylinder (32) to be inserted into the socket (1) for pipe fitting according to claim (1). Plug together, plug cylinder
A plug for a pipe fitting in which an elastic ring (311, 312) is fitted on a connecting surface between the (32) and the adapter (30) so that the plug cylinder (32) can be swung. 3. The end portion of the fixed pipe and / or its branch pipe provided along the wall surface or the partition or inside the wall or the like is directed upward, and the end portion of the fixed pipe is attached.
The socket for pipe fitting according to (1) is fixed with the plug insertion hole facing upward, while the tip is directed downward at the fluid flow port end of a water heater such as a gas water heater. And a plug connection system for fixing the plug and connecting the plug on the device side to the socket by dropping it from above.