JPS5910474Y2 - Female fitting piece of pipe fitting - Google Patents

Description

[Detailed description of the invention] This invention relates to a female joint piece of a certain pipe joint from a pair of male and female joint pieces.

When a shutoff valve is provided on the fluid supply side joint piece, when fluid pressure is applied to this shutoff valve, the shutoff valve on this joint piece is opened against the fluid pressure and connected to the other joint piece. This requires a relatively large connecting force, and the higher the fluid pressure or the larger the diameter of the fluid path, the more difficult it becomes.

Furthermore, when separating the male and female joint pieces that are connected to each other, fluid leakage tends to occur from the fluid supply side when fluid pressure is applied as described above, and residual fluid is discharged from the other joint piece. Therefore, it can sometimes be dangerous.

To solve these problems, (a) open the fluid path after connecting the male and female joint pieces to each other;

(b) Separate the male and female joint pieces after cutting off the fluid flow.

(c) Dispose of residual fluid prior to separation of the male and female joint pieces.

This is desirable. This device was devised for the purpose of solving these problems, making it easier to separate the connection between the male and female joint pieces, and preventing leakage of the conducting fluid. It is characterized by being provided with an opening/closing mechanism and a residual pressure removal mechanism.

Examples will be described below with reference to the drawings.

In FIG. 1, 10 is a male joint piece, 20 is a female joint piece, and the male joint piece 10 is connected to the insertion hole 22 of the female joint piece 20, as is well known.
An outer circumferential groove 14 for locking a locking ball 24 is provided at one end of the insertion end 12 that is inserted into the locking ball 24.

As is well known, the female joint piece 20 has a tapered hole 2 radially bored in the peripheral wall of the main body 26 of the female joint piece 20 by the locking ball.
8, and is prevented from moving out in the radial direction by an operation ring 32 which is elastically resiliency in the axial direction by a compression spring 30 fitted to the outer periphery of the main body.

A through hole 34 is formed radially in the deep position of the insertion hole 22 of the female joint body 26, and a through hole 36 that communicates with the shaft hole 38 is formed in the deep part of the through hole 34 through the wall surface 40. and arrange them in parallel.

A sliding valve 44 having a communication groove 42 on the inner circumferential surface for communicating the through holes 34 and 36 is provided on the outer periphery of the female joint piece main body 26.
mate.

52 is a seal ring provided on the outer periphery of the wall surface 40; 46;
48 is a seal ring placed opposite the seal ring 52 with the through hole 34 in between, and 48 is a seal ring 5 with the through hole 36 in between.
2, which is provided on the rear inner periphery of the sliding valve 44 to face the seal ring 46 on the outer periphery of the main body 26 and the seal ring 4 on the inner periphery of the sliding valve 44 in the state shown in FIG.
8 provides a fluid tight seal.

Further, when the slide valve 44 moves to a position where it comes into contact with the rear end flange 50 of the main body 26 as shown in FIG. The through hole 34 communicates with the outside air without being sealed by the sliding valve 44.

In the same figure, 44' is a shielding part that blocks the through hole 36 on the shaft hole 38 side and the through hole 34 on the fitting hole 22 side at the outer periphery of the female joint piece body 26, and 45 is a shielding part 45 that blocks the through hole 36 on the shaft hole 38 side and the through hole 34 on the fitting hole 22 side. This is an opening that allows communication between the through hole 34 on the insertion hole 22 side and the outside of the female joint piece when both the holes 34 and 36 are in a non-communicating state.

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

In the connected state of the male and female joint pieces shown in FIG. It is conducting.

When separating the male and female joint pieces, as shown in FIG.
, 52 to cut off conduction between the male and female joint pieces.

Due to this movement of the slide valve 44, on the other hand, the through hole 34 is released from the sealed state and communicated with the atmosphere, so that all the fluid remaining on the male joint piece 10 side is discharged into the atmosphere.

Next, resist the elastic force of the compression spring 30 and move the operating ring 32 to the third position.
When the locking ball 24 is released from its inhibited state by moving to the left in the figure, the locking ball moves out a little in the radial direction, allowing the male joint piece 10 and the female joint piece 20 to be separated.

If the through hole 36 is closed with the slide valve 44 as described above, even if fluid pressure is applied to the female joint piece 20 side, the subsequent connection of the male joint piece 10 is extremely easy.

When connecting the male joint piece 10 and the female joint piece 20, the operating ring 32 is moved to the left in FIG. 3 against the elastic force of the compression spring 30 to once release the locking ball 24. , insertion hole 22
Insert the male joint piece 10 into the outer peripheral groove 1 of the male joint piece 10.
4 to lock the locking ball 24.

In this case, although the through hole 34 at the back of the insertion hole 22 of the female joint piece body 26 is open to the atmosphere, no fluid compression occurs when the male joint piece 10 is inserted into the insertion hole 22. figure,
The male and female joint pieces 10, 20 can be easily connected.

In the state shown in FIG. 2, the male and female joint pieces 10.
20, when the operating ring 32 is moved to the left in the figure, the sliding valve 44 moves backward along with the operating ring 32, and the sliding valve 44 is in the same state as shown in FIG. The fluid path can be shut off and the male joint piece 10 can be separated from the female joint piece 20 at the same time.

The embodiment has been described above, but in this invention, a wall surface 40 is formed inside the main body 26 of the female joint piece 20 to block the male joint fitting hole 22 and the fluid flow axis hole 38, and the wall surface 40 is sandwiched between the two walls. On both sides thereof, there are through holes 34, 3 which communicate with the inner circumference of the female joint piece 26 and the fitting hole 22 and the shaft hole 38, respectively.
6 is bored in the outer periphery of the female joint piece main body 26.
A communication groove 42 connects the fitting hole 22 side through hole 34 and the shaft hole 38 side through hole 36 at the outer periphery, and blocks the shaft hole 38 side through hole 36 and the fitting hole 22 side through hole 34 at the same outer periphery. A slide valve 44 having a shielding portion 44 is connected to a fluid-tight seal 4.
6, 48, and 52 are interposed so as to be slidably fitted in the axial direction, the end of the sliding piece 44 is provided with a through hole on the side of the shaft hole 38 by the shielding part 44'. An opening 45 that communicates the fitting hole 22 side passage 34 with the outside of the pipe joint when the fitting hole 22 side passage hole 34 and the fitting hole 22 side passage hole 34 are cut off is provided by removing the inner periphery of the end. Therefore, when connecting the male joint piece 10 to the female joint piece 20 of this invention, the sliding valve 44 is operated in advance to separate the fluid circulation shaft hole 38 side and the male joint piece insertion hole 22 side with the shielding part 44'. If this is done, even if fluid pressure is applied to the shaft hole 38 of the female joint piece, the male joint piece 10 can be smoothly connected to the female joint piece 20 without being affected by the fluid pressure. In particular,
Since the through hole 34 on the insertion hole 22 side is open to the atmosphere,
In the process of connecting the male coupling piece 10 and the female coupling piece 20, no fluid compression occurs within the fitting hole 22, and therefore the connection can be made with small force.

Moreover, even when separating the male joint piece 10 and the female joint piece,
Since the through hole 36 can be blocked off in advance by the sliding valve 44, the male and female joint pieces can be easily separated without being affected by fluid pressure in this case, and the fluid will not flow when the connection is separated. No leakage accidents occur.

Furthermore, since the through hole 34 can be opened to the atmosphere during separation, the fluid remaining on the male joint piece 10 side is discharged from the through hole 34 into the atmosphere, and the operation of the operating ring 32 is not affected by fluid pressure. There are also some features.

[Brief Description of the Drawings] The drawings show one embodiment of this invention together with a male joint piece. Fig. 1 is a vertical cross-sectional side view of the quarter half when the male joint piece is separated, and Fig. 2 is a side view of the male joint piece. FIG. 3 is a longitudinal cross-sectional view of the main part when the male and female joint pieces are connected and the fluid path is closed by a slide valve. 10...Male joint piece, 20...Female joint piece, 22...Male joint piece fitting hole, 26...
Female joint piece body, 32... Operating ring, 34, 36
...Through hole, 38...Shaft hole, 40...
... Wall surface, 42 ... Communication groove, 44 ... Sliding valve, 44' ... Shielding part, 45 ... Opening, 46, 48, 52. ...Fluid-tight seal.

Claims (1)

[Scope of utility model registration request] A wall surface is formed inside the body of the female joint piece to block the male joint fitting hole and the fluid circulation shaft hole, and a wall surface is formed on both sides of the wall surface to block the male joint fitting hole and the fluid circulation shaft hole. and a through hole that communicates with the shaft hole individually, and further a communication groove on the outer periphery of the female joint piece body that allows the fitting hole side through hole and the shaft hole side through hole to communicate with each other at the outer periphery, A female joint of a pipe joint in which a sliding valve equipped with a shielding part that blocks off a shaft hole side passage hole and a fitting hole side passage hole at the same outer periphery is slidably fitted in the axial direction with a fluid-tight seal interposed. In the piece, the end of the slide valve is provided with an opening that communicates the fitting hole side through hole with the outside of the pipe joint when the shaft hole side through hole and the fitting hole are blocked by the shielding part. A female joint piece of a pipe joint created by removing the inner circumference of the pipe joint.