JPH089514Y2 - Pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention cuts off the fluid supply to the inside of the pipe joint before separating the connected socket and plug, and immediately after that, the inside of the pipe joint is disconnected. The present invention relates to a pipe joint in which the pressure of the residual fluid is removed, and the socket and the plug can be separated safely and easily without causing discomfort.

[Prior Art] For example, when piping between a fluid supply source and a fluid consumption source using a hose or a hard pipe, various pipe joints including sockets and plugs that are easily separated from each other have been conventionally used. The spent fluid consumption source is typically separated from the fluid supply source. However, in this case, before separating the socket and the plug, it is necessary to close the valve provided in the pipe connecting the fluid supply source or to stop the fluid supply source.

Moreover, since the pressurized fluid remains in the pipe, the fluid in the pipe on the fluid consumption source side spurts out vigorously when the socket and plug are separated, and at this time, a rustling gushing noise or a plug Bouncing was also very uncomfortable and dangerous.

[Problems to be Solved by the Invention] In view of the above-mentioned problems in the conventional fluid piping, the present invention provides a fluid supply source side with one operation when the socket and the plug are separated. Block the fluid passage of
Subsequently, it is intended to solve the problem that the residual fluid on the side of the fluid consumption source can be discharged, thereby eliminating the trouble and discomfort at the time of separation and enabling the socket and the plug to be separated without danger. In addition, the socket and the plug should not be separated unless the closing of the fluid passage and the discharge of the residual fluid are completed, and thus the risk of inadvertent separation of the socket and the plug may occur. The problem to be solved is to prevent it.

[Means for Solving the Problems] The present invention provides a first means for solving the above problems.
The idea is to press the lock ball that moves forward and locks the plug at the tip of the socket, retreat to release the presser foot, and when the socket and plug are not connected, they are held in the retracted position and advance when connected. Equipped with a sleeve of
When the socket and the plug are not connected, the valve element provided inside the socket closes due to the elastic force of the compression coil spring to close the fluid passage, and when the socket and the plug are connected, the valve element is pressed by the compression coil to cause the valve element to move. In a pipe joint having a structure that retracts against the elastic force of a spring to open the fluid passage, the valve body of the socket has a valve head portion at the rear portion and the inner and outer peripheral portions communicate with the peripheral wall on the rear side. In addition to having a tubular body structure having a through hole, a seal ring for sealing the end face of the plug at the time of the connection is provided at the front open end of the valve body, and between the valve body and the socket main cylinder body, A valve seat sliding cylinder that has a valve seat that abuts the valve head of the valve body at the rear part and that opens and closes the through hole of the valve body is slidably fitted in the axial direction, and the socket main cylinder body The operation tube is loosely fitted to the outer peripheral surface to allow the operation tube and the front The sliding cylinder for the valve seat is movably connected to the sliding main cylinder in the axial direction through a pin that is movably inserted in a long hole for guide formed in the main socket of the socket, and the forward and backward positions of the operating cylinder are connected. In this case, when the operating cylinder is moved forward to the forward position, the valve head is pushed back by the connected plug, the valve head is separated from the valve seat sliding cylinder, and the through hole is opened. When the operating cylinder is retracted to the retracted position, the valve body separates from the connected plug and its valve head is the valve of the sliding cylinder for the valve seat. The guide length formed on the socket main cylinder body is set to a position where the forward movement of the operating cylinder is blocked by the sleeve that abuts against the seat to close the through hole and separates the plug in this state to retract the plug. The operation cylinder is set in the hole by locking the pin, and the forward and backward positions are set. Employing the configuration provided with a locking portion for fixing.

A second invention employs a structure in which a fluid discharge hole is formed in the main socket of the socket between the lock ball and the sliding cylinder for the valve seat.

[Operation] The valve body provided inside the main socket of the socket is urged forward by the elastic force of the compression coil spring when the socket and the plug are not connected, and the valve head provided at the rear portion is the valve head. The fluid passage of the socket main cylinder is closed by abutting on the valve seat of the seat slide cylinder and cutting off the outer circumference of the valve body on the fluid supply side and the inner circumference of the valve body. At this time, the operating cylinder is in the retracted position together with the sleeve. Next, when the socket and the plug are connected, the sleeve advances to lock the plug with the lock ball. At this time, the valve head of the valve body of the socket does not move away from the valve seat because the sliding cylinder for the valve seat cannot move, so that the fluid passage of the main socket of the socket remains closed.

In the connected state of the socket and the plug, when the operation cylinder fitted to the outer peripheral portion of the socket main cylinder is moved forward, the valve seat slide cylinder advances through the pin, and first, the valve seat slide cylinder is moved. The front seal ring of the moving cylinder makes pressure contact with the end face of the plug previously connected to seal between the socket and the plug, and then the valve head of the valve body separates from the valve seat of the sliding cylinder and the socket main cylinder Open the fluid passages in the body and the fluid will flow from the socket side to the plug side.

After use, in the connection state of the socket and the plug,
When the operating cylinder fitted to the outer peripheral part of the socket main cylinder is moved backward, the sliding cylinder for the valve seat retracts via the pin, and first the valve seat comes into contact with the valve head of the valve main body and the socket main The fluid passage of the cylindrical body is closed by the valve body.

When the operating cylinder is further retracted, the valve seat sliding cylinder further retracts the valve body against the elastic force of the compression coil spring. As a result, the opening front part of the cylindrical valve body is located at the end surface of the plug. To get away from. At this time, the connection state between the socket and the plug is still maintained, but the residual fluid on the plug side passes between the opening front part of the valve body and the end face part of the plug,
It is discharged to the outside through the gap between the socket and the plug, and the residual pressure disappears.

After retracting the operation tube, the sleeve is retracted to unlock the plug by the lock ball,
The socket and plug are separated. In the operation tube and the sleeve, when the sleeve is in the retracted position, the operation tube is prevented from moving forward, and when the operation tube is in the advanced position, the sleeve is prevented from moving backward. Only after the connection of the plug and the plug is completed, the fluid passage can be opened, and after the fluid passage is closed, the socket and the plug can be separated.

Example 1 Hereinafter, a first example shown in the drawings will be described in detail.

In the drawings, 1 is a socket, 2 is a socket main cylinder that constitutes the socket 1, 3 is a fluid that is axially movably provided in the socket main cylinder 2, and penetrates the socket main cylinder 2 in the axial direction. A valve body that opens and closes the passage 4.

The valve body 3 is a tubular body having an opening at the front portion, has a valve head portion 5 at the rear portion thereof, and a through hole 6 for communicating the inner and outer peripheral portions of the valve body 3 at the rear side peripheral wall near the valve head portion 5. Are formed. Further, the valve head 5 is provided with a seal ring 7 that comes into contact with a valve seat, which will be described later, to shut off the fluid passage 4. Further, the front opening comes into contact with the end face portion of the plug 30 and the socket. , A seal ring 8 for sealing the plugs to each other is provided.

Reference numeral 9 denotes a compression coil spring interposed between a step portion formed on the inner wall surface of the main socket body 2 of the socket and the rear portion of the valve body 3, and the elastic force of the compression coil spring 9 causes the valve body 3 to move.
Is biased in the forward direction, and when the valve seat sliding cylinder is retracted, the valve head 5 of the valve element 3 is pressed against the valve seat of the valve seat sliding cylinder, so that the socket 1 and the plug 30 After connecting, the ring 8 for sealing the front end portion of the valve seat sliding cylinder is configured to be in pressure contact with the end surface of the plug 30.

Reference numeral 10 denotes a valve seat sliding cylinder having a valve seat 11 that abuts on the valve head 5 of the valve body 3 at the rear portion. The valve seat sliding cylinder 10 includes a socket main cylinder 2 and a valve body 3. A seal ring 12 having a Y-shaped cross section that is slidably fitted in the axial direction between the two and has a Y-shaped cross-section that seals between the outer peripheral surface and the inner peripheral surface of the socket main barrel 2.
And a similar seal ring 13 is provided on the inner peripheral surface for sealing the outer peripheral surface of the valve body 3.

Reference numeral 14 denotes a guide long hole formed by intersecting the socket main cylinder 2 obliquely with respect to the axial center line. The long hole 14 is a slide cylinder for a valve seat that comes in contact with and separates from the valve body 3. It is formed to have a length that sets the range of motion of 10, and has locking portions 16 and 17 extending in the circumferential direction at both ends of the hole 14 for fixing the sliding cylinder 10 for the valve seat. (Fig. 4).

 The elongated hole 14 may be parallel to the axis.

Reference numeral 18 denotes an operating cylinder that is slidably fitted in the outer peripheral surface of the socket main cylindrical body 2 in the axial direction. The operating cylinder 18 is a valve seat slide by a pin 19 that moves along the guide long hole 14. Moving cylinder 10
It is connected to the sliding cylinder for the valve seat when the operating cylinder 18 is rotated.
10 is adapted to move in the axial direction of the tubular valve body 3.

The length of the guide long hole 14 not including the locking portions 16 and 17 is not constant depending on the angle of intersection with the axial center line of the socket main cylindrical body 2, but the connection between the socket 1 and the plug 30. In this state, when the operating cylinder 18 and the valve seat sliding cylinder 10 are advanced to the foremost position, the valve body 3 is pushed backward by the end face portion of the plug 30 on the one hand and the valve head 3 on the other hand. Part 5
Is separated from the valve seat 11 of the valve seat sliding cylinder 10 to open the fluid passage 4 (FIG. 2), and then the operating cylinder 18 is retracted to the rearmost position, the valve head 5 of the valve body 3 is closed. The valve body 3 is pushed rearward by the seat slide cylinder 10 to close the fluid passage 4 by the help of the elastic force of the compression coil spring 9 on the one hand, and the front opening of the valve body 3 on the other hand to the end face of the plug 30. It is set to a size (Fig. 3) to separate from the part.

Next, the connection locking mechanism of the socket 1 and the plug 30 will be described.

The connection locking mechanism shown in the embodiment is no different from the conventional mechanism, and includes the lock ball 20, the tapered through hole 21 for housing the ball, and the sleeve 2 for restraining and releasing the lock ball 20.
2. Equipped with lock ball retainer ring 26, etc. The radius of the taper through hole 21 provided in the front portion of the socket main cylinder 2 on the centripetal direction side is slightly smaller than the radius of the lock ball 20, and in the embodiment, four taper through holes 21 are formed in a line in the circumferential direction. In this tapered through hole 21, one lock ball 20 is housed so as to be retractable from the inner and outer peripheral surfaces of the socket main cylinder body 2.

The sleeve 22 is axially slidably fitted to the outer peripheral surface of the front part of the main socket body 2, and the inner peripheral surface of the sleeve 22 is a lock for pressing the lock ball 20 toward the centripetal direction during forward movement. A ball pressing surface 23 is provided, and a lock ball releasing portion 24 that allows the lock ball 20 to move when retreating is provided in the front portion thereof.

Reference numeral 25 is a compression coil spring that biases the sleeve 22 forward.

Since the sleeve 22 is provided so as to slide in the front-rear direction on the same outer circumference of the operation cylinder 18 and the socket main cylinder body 2, when the operation cylinder 18 is in the forward movement position, the sleeve 22 operates. And the lock ball pressing surface 23 presses the lock ball 20 in the centripetal direction and the operating cylinder 18 is in the retracted position, the sleeve 22 can be retracted, and when the sleeve 22 is retracted, the lock ball 20 is retracted. At this time, the ball holding ring is released by the action of the compression coil spring 27.
26 can be moved forward to a position for supporting the lock ball 20.

Reference numeral 28 denotes a fluid discharge hole formed between the tapered through hole 21 for accommodating the lock ball formed in the front portion of the main socket 2 of the socket and the sliding cylinder 10 for the valve seat.
It allows the fluid that remains on the side to be released and the pressure to drop faster.

Reference numeral 31 is a lock ball engaging groove formed on the outer peripheral surface of the plug 30 in the circumferential direction for locking the lock ball 20.

 Next, the operation of the above embodiment will be described.

In the state where the socket 1 and the plug 30 are not connected, the operating cylinder 18 is in the retracted position, and on the other hand, the valve body 3
Is urged forward (to the right in FIG. 1) by the elastic force of the compression coil spring 9, and the valve head 5 of the valve element 3 moves along with the operating cylinder 18 of the valve seat sliding cylinder 10 in the retracted position. Valve seat 11
, And the fluid passage 4 of the socket main cylinder 2 is closed.

When connecting the socket 1 and the plug 30 to each other, the sleeve 22 whose backward movement is prevented from being blocked by the operation cylinder 18 which is already in the retracted position is moved to the rear, and the lock ball releasing portion 24 of the sleeve 22 is locked. Position above 20. At this time, the lock ball 20 is a compression coil spring.
The forward movement of the lock ball retainer ring 26, which is biased by 27, pushes it out in the centrifugal direction to allow the plug 30 to be inserted.

In this state, when the plug 30 is inserted into the socket main cylinder 2, the lock ball pressing ring 26 is inserted by the plug 30 while being inserted.
Is pushed backward, and the lock ball 20 releases the pushing force in the centrifugal direction. If you insert the plug 30 further,
When the lock ball engaging groove 31 formed on the outer peripheral surface of 30 reaches the centering position of the lock ball 20, the lock ball 20 is pushed in the centering direction by the sleeve 22 biased forward by the compression coil spring 25. Is engaged with the lock ball engaging groove 31 of the plug 30, and the lock ball pressing surface 23 formed on the inner peripheral surface of the sleeve 22 presses the lock ball 20 in the centripetal direction. After that, the lock ball 20 is prevented from coming out of the lock ball engaging groove 31, and the socket 1 and the plug are
Connection with 30 is completed.

After connecting the socket 1 and the plug 30 in this way, the operating cylinder 18 is rotated, the pin 19 is moved forward along the guide portion 15 of the elongated guide hole 14, and the pin 19 is connected to the operating cylinder 18. The valve seat sliding cylinder 10 is also moved forward, and when the valve seat sliding cylinder 10 and the operating cylinder 18 reach the foremost positions, the pin 19 is formed on the front portion of the guide portion 15 as a locking portion. Lock to 16. As a result, the tubular valve element 3 pressed by the compression coil spring 9 moves forward with respect to the valve seat 11 of the valve seat sliding cylinder 10 following the valve seat sliding cylinder 10.

In the process of the valve seat sliding cylinder 10 moving forward as described above, the valve body 3
Is a plug whose front opening is connected to socket 1
Abuts the tip of and is blocked from further movement, where
Although the seal between the socket 1 and the plug 30 is completed, when the valve seat sliding cylinder 10 is further advanced, the valve head 5 of the valve body 3 and the valve seat 11 of the valve seat sliding cylinder 10 are Gradually begins to separate,
Eventually, the inside and outside of the valve body 3 are communicated with each other through the through hole 6 of the valve body 3, the fluid passage 4 of the socket main cylinder body 2 opens, and the fluid passage of the plug 30 having no valve body (not shown). Communicates with.

In the connected state of the socket 1 and the plug 30, the sleeve 22 is prevented from moving backward by the operating cylinder 18 that has moved forward, so the socket 1 and the plug 30 cannot be separated unless the operating cylinder 18 is artificially retracted.

Flow pressurized fluid when connecting the socket 1 and the plug 30,
After that, when separating the two, first, the fluid supply is stopped, and then the operation cylinder 18 is rotated in the opposite direction to retract the operation cylinder 18 together with the pin 19 and slide the valve seat slide cylinder.
Retreat 10 together. When the sliding cylinder for valve seat 10 starts to retreat, the valve seat 11 of the ring 10 moves the valve head 5 of the valve body 3.
To the socket main cylinder body 2
Fluid passage 4 is closed.

When the valve seat sliding cylinder 10 is further retracted by the operation of the operation cylinder 18, the valve body 3 is retracted against the elastic force of the compression coil spring 9, and at this time, the operation of the compression coil spring 27 is also assisted. The front portion of the opening of the valve body 3 separates from the end surface portion of the plug 30, and the seal between the socket 1 and the plug 30 is released.

As a result, the residual fluid on the side of the plug 30 is formed between the tip of the valve body 3 and the tip of the plug 30 through the gap between the socket main cylinder 2 and the plug 30, and is formed at the tip of the socket main cylinder 2. It is gradually released to the outside through the gap of the through hole 28, the lock ball 20 as the connecting and locking mechanism, the tapered through hole 21, and the like. After the operation tube 18 is retracted, the sleeve 22 can be moved rearward, and if the sleeve 22 is retracted against the elastic force of the compression coil spring 25, the lock ball 20 is released from the restraining force. The socket 1 and the plug 30 can be separated from each other.

When the socket 1 and the plug 30 are separated, the elastic force of the compression coil spring 27 advances the lock ball pressing ring 26,
Supports the rock ball 20 from the centripetal direction. Then, when the sleeve 22 is released, the lock ball 20 reaches the lock ball release portion 24 of the sleeve 22 and the movement of the sleeve 22 also stops (FIG. 1).

[Embodiment 2] FIG. 5 shows a second embodiment, but the first embodiment is different from the first embodiment except that the compression coil spring 9 is 9'and the mounting position is changed. Since the configuration is the same as the above, detailed description will be omitted.

According to this embodiment, even if the fluid passage 4 of the socket main cylinder 2 is in the open state and the fluid pressure is exerted on the rear end surface of the valve seat slide cylinder 10, the compression coil spring 9'for the valve seat is used. Since the sliding cylinder 10 is pushed rearward, the operation cylinder 18 can be operated easily, and since there is no compression coil spring 9'in the fluid passage 4, the fluid flow becomes smoother.

[Advantages of the Invention] As described above, according to the present invention, when the socket and the plug are connected, the operating cylinder fitted to the outer circumference of the socket main cylinder is moved rearward so that the sliding cylinder for the valve seat can be moved. Since the tubular valve body can be operated via the socket, the fluid passage of the socket can be closed and the residual fluid on the plug side can be discharged to the outside while the socket and the plug are still connected. Therefore, according to the present invention, when the socket and the plug are separated from each other, the residual fluid is not rapidly discharged as before, no unpleasant sound is produced, and the plug bounces off from the socket in the process of being separated. Since there is no vigorous ejection of fluid from between the plugs, there is no danger and the socket and plug can be separated safely and easily.

In particular, by forming a fluid discharge hole in the main socket of the socket between the lock ball and the sliding cylinder for the valve seat, the fluid can be discharged through the hole in a short time. It is possible to improve the sex. Further, in the operation tube and the sleeve, when the sleeve is in the retracted position, the operation tube is prevented from moving forward, and when the operation tube is in the advanced position, the sleeve is prevented from moving backward. , The fluid passage cannot be opened unless the connection between the socket and the plug is completed, and the socket and the plug can be separated only after the fluid passage is closed, so the fluid may flow out carelessly. The effect is that it can be reliably prevented and the safety is extremely high.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a partially longitudinal side view showing a socket when a plug is not connected, and FIG. 2 shows a socket and a plug. Is partially connected and the fluid passage on the socket side is released, and FIG. 3 is a view showing the internal state of the socket when the operating cylinder is operated to release the residual fluid to the outside. FIG. 4 is a partially omitted plan view of a socket main cylinder showing an aspect of forming a long hole for a pin guide, and FIG. 5 is a partially omitted part showing a second embodiment. It is a vertical side view. 1 ... Socket, 2 ... Socket main cylinder 3 ... Valve body, 4 ... Fluid passage, 5 ... Valve head 6 ... Through hole, 7 ... Seal ring 8 ... Seal ring 9,9 ' ...... Compression coil spring 10 ...... Sliding cylinder for valve seat, 11 ...... Valve seat 12 ...... Seal ring, 13 ...... Seal ring 14 ...... Pin guide slot, 18 ...... Operating cylinder 19 ...... Pin , 20 ...... Lock ball 21 ...... Taper through hole, 22 ...... Sleeve 23 ...... Lock ball holding surface 24 ...... Lock ball release part 25 ...... Compression coil spring, 30 ...... Plug 31 ...... Lock ball engaging groove

Claims (2)

[Scope of utility model registration request] 1. A tip of a socket presses a lock ball that advances and locks a plug, and retracts to release the presser,
In addition, when the socket and plug are not connected, a sleeve is provided that is held in the retracted position and moves forward when it is connected.When the socket and plug are not connected, the valve element inside the socket has an elastic force of the compression coil spring. In a pipe joint having a structure in which the fluid passage is closed by closing with a plug and the valve body retreats against the elastic force of the compression coil spring to open the fluid passage when the socket and the plug are connected, , The valve body of the socket has a tubular structure having a valve head portion at a rear portion thereof and a through hole communicating with an inner and outer peripheral portion on a rear wall of the rear portion, and the connection is provided at a front opening end of the valve body. Sometimes a seal ring is provided to seal the end face of the plug, and a valve seat that abuts the valve head of the valve body is provided between the valve body and the socket main cylinder body, and the through hole of the valve body is provided. Valve to open and close The sliding cylinder for the valve is slidably fitted in the axial direction, and the operating cylinder is loosely fitted to the outer peripheral surface of the socket main cylindrical body, and the operating cylinder and the sliding cylinder for the valve seat are connected to the socket. When the operating cylinder is in the forward and backward positions, it is connected to the guide elongated hole formed in the main cylinder so as to be integrally movable in the axial direction through a pin that is freely movable. When the valve is pushed forward, the valve body is pushed back by the connected plug, the valve head separates from the valve seat sliding cylinder to open a through hole, and the sleeve is moved backward when the plug is connected. In addition, when the operating cylinder is retracted to the retracted position, the valve body separates from the connected plug and its valve head abuts the valve seat of the valve seat sliding cylinder to close the through hole, And in this state, by setting the position where the forward movement of the operating cylinder is blocked by the sleeve that moves backward by separating the plug, Serial The slot guide formed on the socket main cylindrical body, a pipe joint, characterized in that a locking portion for fixing the retracted position and have been advanced position the control cylinder by locking the said pin. 2. The pipe joint according to claim 1, wherein the socket main cylinder has a fluid discharge hole formed between the lock ball and the sliding cylinder for the valve seat.