JPH0125837Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application] The present invention is a gas connection switchgear, in particular, when a socket, which is one side of the gas connection device, is connected to a plug, which is the other side of the gas connection device, a circuit is connected. This relates to a device in which a gas circuit is opened and closed at the same time, and in order to ensure that the valve device in the plug that opens and closes when the socket is connected is closed when the socket is removed, the valve device is closed at the same time. The valve is forcibly moved to close by the socket.

[Prior art and its problems] A gas connection device in which a gas circuit is opened and closed at the same time by connecting a socket has already been developed since 1983.
-There is one disclosed in Publication No. 166275. As shown in FIG. 7, this conventional type has a rotary valve 11 and a lift valve 12 built into a main body 1 equipped with a plug 10. When a socket 3 is connected to this main body 1, this socket 3 The shaft portion 31 built in opens the lift valve 12, and at the same time opens the rotary valve 11.
Open and rotate. For this reason, a direct-acting cam mechanism is interposed between the leg part 13 of the lift valve 12 and the rotary valve 11, and when the socket 3 is connected, the shaft part 31 enters into the direct-acting cam mechanism. The cam mechanism operates to open and rotate the rotary valve 11, and conversely, when the socket is removed, the return urging force of the spring 14 acting on the lift valve 12 causes the lift valve 12 to return to its initial position. At the same time, the rotary valve 11 is closed by the action of the direct-acting cam mechanism.

As described above, this conventional device has the advantage that the gas circuit can be connected and separated by attaching and detaching the socket, and that the gas circuit can also be opened and closed.

However, in this conventional cam mechanism, if dust gets caught in the direct drive cam mechanism, the smooth operation of this mechanism becomes insufficient, and the rotary valve 11 and lift valve 12 are left incompletely closed. Sometimes.

This means that the lift valve 12, direct drive cam mechanism, etc.
Since it is operated only by the biasing force of the spring 14 acting on the lift valve 12,
In addition, the operating force for connecting the socket 3 is
From the viewpoint of operability, it cannot be set too large, and for this reason, the spring 14 for returning each operating part
This is because it is not possible to install a large urging force.

[Technical Problem] The present invention is such that the slider 15, which is normally placed at the most advanced position by the biasing force of the spring 14, faces the downstream opening end of the plug 10, and the connection of the socket 3 is prevented. Accordingly, the shaft portion 31 provided in the socket 3 forcibly pushes the movable element 15, and when the socket 3 is removed, the movable element 15 is automatically returned by the return biasing force of the spring 14, The mover 15 is linked or integrated with a valve device that opens and closes the circuit inside the plug 10, and this valve device opens when the mover 15 is pushed in and closes when it returns. In order to prevent the valve body from failing to close properly when the socket 3 is removed, the device is designed so that the operating force acts as a closing force on the valve body when the socket 3 is removed. Take it as a challenge.

[Technical Means] The technical means of the present invention taken to solve the above technical problem are as follows:
and a neck portion 33 following this, and on the other hand, an engaged portion 16 is formed on the mover 15, with which the head portion 32 engages with a predetermined engagement force.

[Operation] The above technical means of the present invention operates as follows.

When the socket 3 is connected to the plug 10, the shaft portion 3
The head 32 of the plug 10 contacts the engaged portion 16 of the mover 15 facing the downstream open end of the plug 10, and is forcibly engaged. When the connection between the socket 3 and the plug 10 is completed, the shaft portion 31 is in a state in which the slider 15 is pushed in by a certain stroke.
Therefore, the valve body within the plug 10 is thereby set to the open state.

Next, after using the gas, when the socket 3 is removed, the valve body within the plug 10 is moved to the valve closing position by the biasing force of the spring 14, and the shaft portion 3
Since the head 32 of the socket 1 and the engaged portion 16 are in an engaged state, the valve is forcibly moved to close by the operating force for removing the socket 3. When an external force is applied to the socket 3 in the removal direction from the state where the socket 3 has returned to the fully closed position, the head 32 and the engaged portion 1
6 is disengaged, and the plug 10 and socket 3 can be separated.

[Effects] Since the present invention has the above configuration, it has the following unique effects.

When the socket 3 is removed, the slider 15 in the plug 10 is moved to the valve closing position by the biasing force of the spring 14, and the head 32 of the shaft 31 and the engaged portion 16 are brought into engagement. Since the valve is forcibly moved to close by the operation force for removing the socket 3, even if the operating mechanism of the valve device inside the plug 10 is clogged with dirt, it will not be removed by the operation for removing the socket 3. Thus, the valve device is reliably closed.

Furthermore, since the head 32 is forcibly engaged with the engaged portion 16 of the slider 15 when the slider 15 is biased by the spring 14, the socket 3 is not connected to the plug 10. When doing so, the head 32 and the engaged portion 16 are reliably engaged. Therefore, the reliability of the above operation is guaranteed.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

In this embodiment, the slider 15 is a lift valve 12 that functions as one of the valve devices described above, and a pair of legs 13, 13 are connected to the lift valve 12 toward the upstream side. This leg part 13,1
Pins 17, 17 protrude in the radial direction at the lower end of 3.
is penetrated. As shown in FIG. 4, one ends of the pins 17, 17 fit into linear grooves 18, 18 formed in the side wall of the base of the plug 10, so that the lift valve 12 and the plug 10 move forward and engage each other. That will happen.

Further, the legs 13, 13 are fitted onto a cylinder 4 which is rotatably supported within the main body 1.
The inner end of the pin 17 is fitted into cam grooves 41, 41 formed in the body on the open end side. Furthermore, the cam grooves 41, 41, as shown in FIG.
Both are formed in a spiral shape in one direction, and when the lift valve 12 moves linearly by a certain stroke, the cylinder body 4 is rotated by a certain angle. That is, the lift valve 12
and the cylindrical body 4 are in a threaded pair state.

Next, in this embodiment, a rotary valve 11 is installed in the main body 1.
is incorporated, and this rotary valve 11 is supported by a spring 19.
The rotary valve 11 is brought into contact with the fixed plate 5 located on the downstream side of the rotary valve 11.
is engaged with the lower end of the cylindrical body 4. Therefore, the rotary valve 11 rotates together with the cylinder body 4 while maintaining contact with the fixed plate 5. That is, the cylindrical body 4 functions as a rotation axis.

On the other hand, a pair of passage holes 21, 21 pass through the rotary valve 11, as shown in FIG. It is perforated. These passage holes 2
The relationship between the lift valve 12 and the passage hole 22 is preset according to the relationship with the rotation angle of the rotary valve 11, and when the lift valve 12 is pushed in the most by connecting the socket 3, , these passage holes 21 and passage holes 22 are made to coincide, and conversely,
When the socket 3 has returned to its initial position, the passage holes 21 and 22 are completely displaced in the circumferential direction.

Note that a spring 14 for applying a return urging force to the lift valve 12 is inserted into the cylindrical body 4 and interposed between the lift valve 12 and the bottom of the cylindrical body 4, and further,
The downstream side of the fixed plate 5 and the housing part of the lift valve 12 are
They are communicated via through holes 23, 23 formed at the lower end of the body of the cylinder 4.

In this embodiment, the above-mentioned combination of legs 13, 13, pins 17, 17, and cylinder 4 constitutes a direct-acting cam mechanism in the conventional example described above, and lift valve 12 as mover 15 is connected to the axis of socket 3. When the lift valve 12 is pushed in with the portion 31, the lift valve 12 is opened and the rotary valve 11 is opened and rotated, as shown in FIG. Conversely, when the lift valve 12 is returned to its initial position by the biasing force of the spring 14, the rotary valve 11 is rotated to close as shown in FIG.

Next, in this embodiment, the engaged portion 16 is integrally constructed with the lift valve 12, and the engaged portion 16 and the lift valve 12 are made of an elastic material such as synthetic resin. As shown in FIG. 5, this engaged portion 16 is formed by cutting a plurality of axial slits 25, 25 in the cylindrical portion 24 protruding from the downstream end side of the lift valve 12, and forming the distal end of the cylindrical portion 24. A protruding strip 26 is provided on the inner periphery, and the inner periphery shape of this cylindrical portion 24 is made to substantially match the outer periphery shape of the head 32 formed on the shaft portion 31. Therefore, the inner circumferential diameter of the protrusion 26 is
It is smaller than the outer diameter of the head 32, and when the socket 3 is connected, the head 32 is forcibly fitted into the cylindrical part 24, and the protrusion 26 and the head 32 are connected to the cylindrical part 24. The engagement is performed with an engagement force corresponding to the elastic return force of.

In this embodiment, when constructing the engaged part 16, the depth of the cavity in the cylindrical part 24 is set to be deep, and the ball 28 is press-fitted into the bottom part. The length of the elastically deformable cylindrical portion 24 can be set to be long.

In addition to the cylindrical portion 24 having the slit 25 as the engaged portion 16, as shown in FIG.
may be held.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the embodiment of the present invention, Fig. 2 is a sectional view of the socket 3 connected, and Fig. 3 is the cylindrical body 4.
4 is a side view of the lift valve 12 and the leg 13.
FIG. 5 is a detailed view of the engaged portion 16, and FIG.
The figure is an explanatory diagram of another embodiment of the engaged portion 16, and FIG. 7 is an explanatory diagram of a conventional example. In the figure, 10...plug, 14...spring, 15...mover, 3... Socket, 31...Shaft part, 32...Head part, 33...Neck part, 16...Engaged part.

Claims (1)

[Scope of utility model registration request] A slider 1 is located at the downstream opening end of the plug 10 and is normally placed in the most extended position by the biasing force of the spring 14.
When the socket 3 is connected, the shaft portion 31 provided on the socket 3 forcibly pushes in the slider 15, and when the socket 3 is removed,
The movable element 15 is automatically returned by the return biasing force of the spring 14, and the movable element 15 is
is linked or integrated with a valve device that opens and closes the circuit in the plug 10, and this valve device is connected to the mover 15.
In a gas connection switchgear in which the valve is opened by pushing in and closed by return movement, the shaft part 3
1 is composed of a head 32 and a neck 33 following this, and on the other hand, the head 32 is attached to the mover 15.
A gas connection switchgear having an engaged portion 16 that engages with a predetermined engagement force.