KR930006369Y1 - Pipe coupling socket - Google Patents

Abstract

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Description

Pipe coupling socket

The drawings show an embodiment of the present invention.

Figure 1 is a longitudinal side view of the four halves of the socket.

2 is a side view of four halves of the plug corresponding to the socket shown in FIG.

3 is a longitudinal cross-sectional view of a half-section showing the socket and plug at the time of connection, in detail, at the time of fluid flow.

4 to 6 show an exploded view of the movement of the ball retainer mechanism of the socket valve,

4 is a state diagram when the socket valve is in the closed state.

5 is a state in which the plug is fitted into the socket to open the socket valve.

6 is a state diagram when the socket valve is locked by the locking ball.

* Explanation of symbols for main parts of the drawings

1: socket 2: plug

3: main body 6: sleeve

8: compression spring 11: rock ball

16: fluid flow path 17: socket valve

18: valve cylinder 20: fluid passage hole

21: valve seat 23: projection of the socket valve

24: inner part 25: sleeve

26: ball retainer 28: jam ball

29, 30: tapered surface 32: compression spring

33: small diameter part 35: gap

54: plug valve 56: projection of the plug valve

The present invention relates to a pipe coupling socket that facilitates the connection of a plug with a residual pressure of a high pressure fluid. Conventional valve-type pipe couplings used for high-pressure piping use a type in which a socket valve installed in a socket and a plug valve installed in a plug are pushed open to each other.

Such a conventional pipe coupling is easy to connect the socket and the plug if there is no residual pressure of the fluid in the plug or very low, but when the residual pressure increases, the back pressure to the valve increases, so that the connection by the operator is easy. There was no problem.

The double solution solves the above-mentioned problems and facilitates the connection between the socket and the plug even when the residual pressure of the fluid is high. The object is to provide a ring socket.

In order to solve the above problems, the socket of the present invention is provided with a small diameter portion in a valve barrel portion of a socket valve that is pushed open with a plug valve installed in a plug, and has a tapered surface at the front end surface of the small diameter portion, A sleeve formed in accordance with the diameter of the main cylinder portion is slidably mounted, and a circumferential peripheral surface of the sleeve is added to the rear by a compression spring, so that the retaining bolt can be recessed in the through hole in the center and centrifugal directions. The desired purpose is achieved by fitting the ball retainer and providing an inwardly tapered surface for urging the catching ball in the centripetal direction outwardly of the catching ball.

When the plug is inserted into the socket, the valve on the plug side (the plug valve) presses the valve on the socket side (socket valve) to retract the socket valve. In the process, in the outer circumferential surface portion of the socket valve, the locking bolt retained by the ball retainer moves on the socket valve to maintain the retracted position, thereby opening the fluid flow path of the socket. Connect the socket and plug here.

Subsequently, when a high pressure fluid is supplied to the socket side, the high pressure fluid first flows through the open valve in the plug direction, and the pressure acts on the front side of the plug side to open the plug valve, so that the high pressure fluid flows toward the plug.

The socket valve, which was in the rearmost position by the opening of the plug valve portion, is advanced by the spring force of the compression spring. At this time, since the sleeve remains in the retracted position, there is a space between the valve cylinder portion of the socket valve and the tapered surface of the sleeve. Occurs. Thus, the engaging ball installed in the socket engages the space to lock the socket valve. By this action, the fluid flow path on the socket side is secured in the front end area, thereby ensuring a stable flow of the high pressure fluid.

Next, the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 and FIG. 2 are four half cut side views showing the socket 1 and the plug 2 facing each other. In FIG. 1, reference numeral 3 denotes the main body of the socket via the ring 0 through 4. The adapter 5 is screwed in and has a slightly smaller outer diameter at the front to form the fitting portion 7 of the sleeve 6 and to the compression spring 8 fitted to the outer circumference of the fitting portion 7. By pressing the sleeve 6 forward.

Reference numeral 9 denotes a stop ring fitted to the front of the main body 30 to prevent detachment of the sleeve 6, and reference numeral 10 denotes an annular groove for catching the stop ring. The inner circumferential surface of the sleeve 6 is provided with a pressing projection surface 12 of the lock ball 11 described later. Reference numeral 13 denotes a locking portion of the compression spring 8 formed in the inner circumferential surface of the sleeve 6.

The pressure tip inner circumferential surface 14 of the main body 3 of the socket 1 has a shape substantially the same as the outer circumferential surface of the plug 2. Reference numeral 15 denotes a tapered hole for fitting the lock ball 11, in detail, a tapered hole for fitting the sleeve fitting portion. Specifically, the outer circumference of the sleeve fitting portion 7 has a large diameter cone. In the usual case, four or six tapered holes 15 are formed penetrating both sides of the inner circumferential surface 14 and the sleeve fitting portion 7.

In this way, the lock ball 11 is movably fitted into the tapered hole 15 so that the lock ball 11 is in the centripetal direction by the pressing rough surface 12 of the sleeve 6 as shown in FIG. When pressurized, a part thereof protrudes into the inner circumferential surface 14 of the main body 3 of the socket.

Reference numerals 7A and 7B are retracting rings and zero rings fitted in parallel in the inner circumferential surface 14 of the main body 3 of the socket.

In the main body 3 of the socket, a fluid flow path 16 of a high pressure fluid is formed through the axis line. This fluid flow path 16 communicates with a fluid flow path 5A formed in the socket adapter 5.

Reference numeral 17 denotes a socket valve slidably axially mounted on the fluid flow passage 16 and formed of two portions of a cylindrical valve cylinder portion 18 and a conical valve head 19. Two or four fluid passage holes 20 are radially inclined in the valve head direction at the boundary between the valve head 19 and the valve head 19. Reference numeral 21 denotes a valve seat in which the valve head is engaged when the fluid passage 16 is closed, and is formed in a conical trapezoidal shape so that the zero ring 22 fitted to the outer circumferential surface of the valve head 19 is hermetically or liquid-tight. It constitutes the tape ball seat which contacts.

Reference numeral 23 denotes a protrusion projecting outward from the valve couple 19 of the socket valve 17.

The socket valve 17 is slightly smaller in diameter through the valve cylinder portion 18 and the rear portion 24, and the sleeve 25 is slidably fitted to the valve cylinder portion in an axial direction. The inner and outer circumferential surfaces of several through-holes 27 drilled in the ball retainers 26 by fitting the sleeve 25 and the outer circumferential surfaces of the valve cylinder portion 18 into the ring-shaped ball retainers 26. Insert the catching ball 28 to be sunk in the direction. Reference numeral 29 is a tapered surface formed on the front end surface of the socket adapter 5 to press the locking ball 28 in the center of the ball retainer 26, and reference numeral 30 denotes the locking ball 28 It is a taper surface formed in the front end surface of the sleeve 25 in order to press in the centrifugal direction of the ball retainer 26. As shown in FIG. Reference numeral 31 is a stop ring mounted to the rear of the valve cylinder portion 18 to prevent the sleeve 25 from being separated.

Reference numeral 32 denotes a compression spring that wraps around the valve cylinder portion 18 to press the valve head 19 to press-fit the valve seat 21 and simultaneously presses the ball retainer 26 to the rear of the valve retainer. The retained retaining ball 28 is pressed to press the front tapered surface 29 of the socket adapter 5 and the front tapered surface 30 of the sleeve 25.

As shown in FIG. 2, the plug 2 has a basic configuration as is known in the art, and has an annular groove 51 for accommodating the lock ball 1 installed in the socket 1 on the outer circumferential surface thereof. And a plug valve 54 which is added by a compression spring 53 to close the fluid flow path 52 to the fluid flow path 52 provided through the shaft center and closes the valve seat 55 on the axis line. The plug valve 54 is brought into contact with the valve seat 55 on the axis line. Reference numeral 56 is a protrusion which pushes the protrusions 23 of the socket valve 17 provided in the socket 1 to each other so as to protrude to the outside of the plug 2.

Next, this embodiment explains the operation. In FIG. 1, the sleeve 6 is moved to the left to open the lock ball 11 at the pressed rough surface 12. FIG. Subsequently, when the plug 2 is inserted into the socket, the protrusion 56 of the plug 2 abuts against the protrusion 23 of the socket 1. In addition, since the residual pressure in the plug 2 and the elasticity of the compression spring 53 when the plug 2 is inserted are greater than the elastic force of the compression spring 32 of the socket 1, the plug valve ( 54 presses the valve head 57 into the socket valve 17 in contact with the valve seat 55. Therefore, the valve head 19 of the socket valve 17 gradually moves away from the valve seat 21 of the socket 1.

After the plug 2 is fully inserted into the socket 1, the hand is released from the sleeve 6. As a result, the sleeve 6 is returned by the elastic force of the compression spring 8, and the lock ball 11 is fitted into the annular groove 51 of the plug 2 to engage the socket 1 and the plug 2. Is fully connected. In this state, as shown in FIG. 5, a large fluid flow path 34 is formed therebetween.

Subsequently, when a fluid subjected to a pressure larger than the residual pressure in the plug 2 is introduced from the pipe on the socket 1 side, the pressure is applied to the front of the plug valve 54 inside the fluid flow path 34, thereby providing a plug valve. 54 retreats and the fluid flow path 52 of the plug 2 is opened. Due to the retraction of the plug valve 54, the valve cylinder portion 18 on the socket 1 side moves forward with the sleeve 25 at the same time.

Thus, the catching ball 28, which is inserted into the ball retainer 26 provided at one end of the compression spring 32, is inserted into the tapered surface 29 of the front end of the socket adapter 5 by the elastic force of the compression spring 32. Abuts against the tapered surface 30 of the sleeve 25 and the filling portion 24 of the valve cylinder portion 18, and is caught by the tapered surface 30 at the same time. Prevents advancement and forms a gap 35 between the tapered surface 30 and the filling part 24. As a result, the engaging ball 28 is engaged with the gap 35. On the other hand, the other end of the sleeve 25 abuts against the stop ring 31 fitted in the small diameter portion 33 of the valve barrel portion 18 and stops, as shown in FIG. 3 and FIG. ) Is locked. Thereby, while the high pressure fluid flows into the socket 1, the distance between the valve seat 21 and the valve head 19 is kept constant. (FIG. 3). Therefore, the high pressure fluid flows through the fluid passage 16 and the fluid passage hole 20 in the socket 1 to flow into the plug 2 side.

Next, when the socket 1 and the plug 2 are separated, the supply of the high pressure fluid to the socket-side piping is firstly disconnected. As a result, the plug valve 54 is pushed back by the pressure of the remaining fluid in the plug 2 and the single force of the compression spring 53 to close the fluid flow path 52. At the same time, the projection 56 of the plug valve 54 presses the socket valve 17 against the repulsion force of the compression spring 32. For this reason, since the socket valve 17 moves to the left side in FIG. 3, the distance between the tapered surface 30 of the sleeve 25 and the layer part 24 of the valve cylinder part 18 becomes close, and the latching ball 28 ) Is centrifugally pressed against the tapered surface 30 of the sleeve 29 and away from the sleeve 25. Thus, when the sleeve 6 of the socket 1 is pulled to the left of FIG. 2 against the resilience of the compression spring 8, the pressure relief surface 12 of the inner circumferential surface of the sleeve opens the lock ball 11 The lock ball 11 can be detached from the annular groove 51 of the plug 2 so that the plug 2 can be detached from the socket 1. Due to this separation, the socket valve 17 is pushed back by the repulsive force of the compression spring 32 in the socket 1 to close the fluid flow path 34, and on the other side, the sleeve 25 has a stop ring ( 31) the front end face is brought into contact with the layer portion 24 of the valve cylinder portion 18.

At this time, the locking ball 28 moves over the sleeve 25.

The present invention uses the retraction of the residual pressure to retract the socket valve at the plug valve when the socket is connected to the plug in which the residual pressure of the high pressure fluid is applied, and then retracts the plug valve by the action of the high pressure fluid supplied from the socket side. At the same time, the locking valve installed in the socket is used to lock the socket valve to an open state, thereby allowing a certain amount of high pressure fluid to flow therein, so that a plug having a high pressure fluid remaining therein can be easily connected to the socket. It is characterized by the difficulty of being influenced. In particular, while the high pressure fluid is flowing, the opening of the socket valve as well as the plug valve is also kept constant so that the flow of the high pressure fluid can be stabilized.

Claims (1)

When connecting the socket 1 and the plug 2, the socket valve 17 closing the fluid passage 16 of the socket 1 and the plug valve 54 closing the fluid passage 52 of the plug 2 are connected. In the pipe coupling socket of the type which pushes on each other, the small diameter part 33 is provided in the valve main head 18 of the socket valve 17, and the taper surface 30 is provided in the front end part of this small diameter part 33. And a slidably fitted sleeve 25 formed by fitting the outer diameter to the diameter of the valve cylinder portion 18, and being pushed backward by the compression spring 32 to secure the catching ball 28. An inward tapered surface that presses the retaining ball 28 in the centripetal direction while fitting the ball retainer 26 that is retractably retained in the through hole in the centripetal and centrifugal directions at the outer circumferential surface of the sleeve 25. A pipe coupling socket, characterized in that (29) is provided on the outside of the locking ball (28).