JP2746682B2 - Gas pipe fitting safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a connecting portion for a gas main plug, and a plug for connecting to a socket of a quick fitting provided on a hose on a gas appliance side, and the plug is provided on the plug. The present invention relates to a safety device for a gas pipe connector provided with a seal valve that automatically shuts off as the socket moves in the detaching direction.

In more detail, when the gas plug of the gas appliance connected to the plug is open, the gas main valve is opened and the gas appliance is supplied with fuel gas such as city gas to prevent the inconvenience of raw gas being released. The improvement of safety devices for

[Conventional technology]

Conventionally, a safety automatic shut-off valve is provided upstream of each plug, and the safety automatic shut-off valve is configured to be opened only when the secondary pressure is equal to or higher than a set value. An artificially operated on-off valve is provided in the bypass flow path that supplies gas from the primary side to the secondary side, and when the on-off valve is artificially opened, the secondary pressure of the automatic safety shut-off valve rises above the set value. For example, an automatic safety shut-off valve is opened to supply fuel gas to the gas appliance.

In other words, if the gas valve of the gas appliance is open, the secondary pressure will be less than the set value even if the on-off valve is opened, so the automatic safety shut-off valve will not be opened and gas leakage from the gas appliance will be ensured. It was configured so that it could be prevented.

[Problems to be solved by the invention]

However, since each of the plugs must be provided with a differential pressure actuated safety automatic shut-off valve, bypass flow passage, and manually operated on-off valve, there is a problem that the number of parts is large, the cost is high, and the size becomes large. The problem is particularly acute with gas pipe fittings having a plurality of plugs.

An object of the present invention is not only to obtain a desired safety function, but also to make the gas pipe connecting device inexpensive and compact.

[Means for solving the problem]

A feature of the present invention is that a pressing tool for moving a socket in a detaching direction with respect to a plug having a seal valve for automatic shutoff is provided on the plug in a state of being biased by a spring, and a non-pressing action for allowing the mounting of the socket is provided. A locking device for holding the pressing device at a position, when the upstream pressure of the seal valve drops below a set value, the lock device releases the pressing device from holding at the non-pressing position. With the provision of the automatic socket detaching means, the operation and effect are as follows.

[Action]

If the gas tap connected to the plug is closed while the gas tap on the gas appliance connected to the socket is open, the upstream pressure of the seal valve drops below the set value. The holding release operation of the pressing tool is performed, and the socket is pressed by the spring and the pressing tool. The pressing moves the socket in a direction of detaching from the plug, and shuts off the seal valve of the plug.

That is, even if the gas main plug is opened again, the gas leak does not occur from the gas appliance because the seal valve of the plug is closed.

If the socket is inserted into the plug with the gas source plug open and the gas appliance gas plug closed, the upstream pressure of the seal valve will be maintained at or above the set value. The pressing device is held in the non-pressing action position by the device, the socket and the plug can be connected, and even if the gas valve of the gas appliance is subsequently opened, as long as the gas main valve is open, the upstream pressure of the seal valve is maintained. It is maintained above the set value, and the gas supply to the gas appliance can be continued. Then, even if the gas tap of the gas appliance is closed with the gas tap open, the upstream pressure of the seal valve is maintained at or above the set value, and the connection between the socket and the plug is maintained.

In short, when the gas is being supplied to the gas appliance, the seal valve of the plug is automatically shut off only when the gas main valve is closed while the gas valve of the gas appliance is open, even if the main valve is opened again. Leakage is reliably prevented. In addition, it is possible to sense that the gas stopper of the gas appliance is open due to the phenomenon that the socket is disconnected from the plug, and to maintain safety.

In particular, by utilizing the seal valve originally provided in the plug of the quick coupling, and by automatically closing the seal valve by moving the socket in the disengagement direction, the differential pressure is reduced as in the prior art described above. The number of components can be reduced sufficiently, the cost can be reduced sufficiently, and the compactness can be sufficiently achieved, compared with the provision of an operation-type automatic shutoff valve for safety, a bypass passage, and a manually operated on-off valve. In particular, as the number of plugs increases, the effects of reducing the number of parts, reducing costs, and reducing the size are greater.

〔The invention's effect〕

As a result, even if the gas main valve is closed and then reopened while the gas appliance is kept open, gas leakage can be reliably prevented, and it is not only excellent in safety but also excellent in production. It has become possible to provide a more excellent gas connector in terms of cost, cost, and use.

〔Example〕

 Next, an embodiment is shown in FIG. 1 and FIG.

A socket (3) for connecting to a plug (2) of a quick fitting attached to a gas main plug (1) is attached to a hose (5) connected to a gas tap (4). 6) are provided, and a socket (9) attached to a hose (8) connected to a gas appliance (7) is configured to be connectable to and detachable from a plug (6).

A seal valve (10) is provided in each of the plugs (6) in a state where the seal valve (10) is closed and biased by a spring (11). When the socket (9) is inserted into the plug (6), the rod ( According to 12), the seal valve (10) is pushed and opened, and the seal valve (10) for detaching the socket (9) from the plug (6) is automatically shut off.

In each of the sockets (9), a sliding cylinder (14) is provided inside the main body (13) in a state urged toward the distal end by a spring (15), and a sliding ring (16) is provided outside the main body (13). Are provided in a state of being biased to the distal end side by a spring (17), and a concave portion is formed in the sliding ring (16) for receiving the ball (18) inserted into the hole of the main body (13).

That is, when the socket (9) is inserted into the plug (6),
The sliding cylinder (14) is pushed by the plug (6) and disengages from the ball (18), and the spring (17) moves the sliding ring (16) to move the ball (14) into the circumferential groove of the plug (6). , So that the socket (9) and the plug (6) can be prevented from coming off. When the sliding ring (16) is moved against the spring (17) in this state, the pressing action of the ball (18) by the sliding ring (16) is lost, and the springs (15) and (17) The body (13) is moved by the action, the ball (18) is disengaged from the plug (6) by the sliding cylinder (14), and is pushed into the recess of the sliding ring (16), and the spring (15),
According to (17), the socket (9) is configured to be detached from the plug (6).

The plug (2) and the socket (3) of the quick joint on the gas main plug (1) side have the same configuration.

The pressing tool (19) for detaching the socket (9) is placed in contact with the sliding ring (16), and the sliding ring (16) is moved by the spring (20) against the spring (17). Pressing tools (1
The slide ring (16) is moved by the spring (9) and the spring (20) so that the socket (9) can be detached from the plug (6).

A lock (A) for holding the pressing tool (19) is provided at a non-pressing position for allowing the socket (9) to be mounted on the plug (6), and the upstream pressure of the seal valve (10) is set. An automatic socket releasing means (B) is provided for releasing the holding of the pressing tool (19) in the non-pressing operation position by the locking tool (A) when the value drops below the value.

To form the socket automatic release means (B), a pressure chamber (2) formed by a pressure receiving plate (21) and a diaphragm (22)
3) The gas flow path (24) on the upstream side of the seal valve (10)
To the pressure receiving plate (21)
The pressure chamber (23) is provided with an external force in a direction opposite to the pressure from the pressure chamber (23).

To form the lock (A), attach the shaft (2) to the pressure receiving plate (21).
Attach the locking member (27) so that it can swing freely in 6), and
7) a supporting member (28) for supporting the tip side against its own weight is provided, and the locking member (27) swings as the pressure receiving plate (21) moves up and down, so that the locking member (27) is It is configured to move to an engagement position and an engagement release position with respect to (19).

In other words, the gas tap (1) is open and the pressure chamber (2
When the internal pressure of 3) is higher than the set value, the locking member (27)
Engages with the pressing member (19), the pressing member (19) is held in the non-pressing position, the connection state between the socket (19) and the plug (6) can be maintained, and the gas plug of the gas appliance (7) can be maintained. When the gas source plug (1) is closed and the internal pressure of the pressure chamber (23) becomes equal to or lower than a set value, the pressure receiving plate (21) is pushed down by the pressure setting spring (25), and the locking member ( 27) comes off the pressing tool (19), and the sliding ring (16) is moved by the pressing tool (19).
, The socket (9) is automatically detached from the plug (6), and the seal valve (10) is automatically shut off.

The cam surface (19a) of the pressing member (19) and the cam surface (27a) of the locking member (27) are moved by the pressing of the pressing member (19) by the socket (9). Due to the action of 27a), the locking member (27) is once lifted and then dropped, so that the locking member (27) is engaged with the pressing tool (19), and the internal pressure of the pressure chamber (23) is set. If it is higher than the value, simply insert the socket (9) into the plug (6) and press
Can be reset to the non-pressing position.

Release button (29) on gas tap (4) case (4a)
When the release button (29) is operated by pressing the release button (29), the pressure receiving plate (21)
Is depressed, the locking member (27) is disengaged from the pressing tool (19), and the socket (9) is detached from the plug (6) as described above.

(Another embodiment)

 Next, another embodiment will be described.

The specific configuration for connecting the gas tap (4) to the gas tap (1) can be appropriately changed. For example, the hose (5) may be directly connected to the gas tap (1), and the hose (5) And gas socket (4) with socket (3)
, And these various connection means are collectively referred to as connection portions (3, 5).

The number of plugs (6) provided in the gas tap (4) may be one or three or more. Further, the structure of the plug (6) and the structure of the socket (9) corresponding thereto can be appropriately changed. For example, even when the socket (9) is pressed by the pressing tool (19), the socket (9) may be configured so as not to come off the plug (6) and remain fitted.

The pressing tool (19) and the spring (20) that biases it
Appropriate changes can be made in the shape, mounting configuration, etc.

The specific configuration of the lock member (A) can be changed as appropriate, and for example, a locking member (27) may be attached so as to be reciprocally slidable.

The specific configuration of the automatic socket releasing means (B) can be freely changed in various ways, and for example, the following configurations (A) to (C) can be used.

(A) The pressure in the gas flow path (24) is detected by a pressure sensor, and when the detected pressure falls below a set value, the lock (A) is held and released by an electric actuator or the like.

(B) As in the above embodiment, the socket automatic release means (B) is configured to maintain the lock member (A) in the non-holding operation state when the upstream pressure of the seal valve (10) is equal to or lower than the set value. Then, the socket (9) could not be attached to the plug (6) unless the pressure on the upstream side of the seal valve (10) became high, and the gas appliance (7) with the gas plug kept open was connected to the plug (6) again. There is an advantage that an inconvenience in which the gas source plug (1) is later opened to cause gas leakage can be reliably prevented.
However, the socket automatic release means (B) may be configured to temporarily bring the lock member (A) into the non-holding operation state when the upstream pressure of the seal valve (10) falls below the set value. .

(C) When a plurality of plugs (6) are provided, a plurality of locking tools (A) attached separately to the plugs (6) are operated by one socket automatic release means (B). This configuration is effective for further simplifying the configuration, reducing the cost, and reducing the size.

 The type of gas appliance (7) and the type of gas are not specified.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall conceptual diagram, and FIG. 2 is a sectional view of a main part. (1) ... Gas main plug, (3,5) ... Connection, (6) ...
Plug, (7) ... gas appliance, (8) ... hose,
(9) Socket (10) Seal valve (19)
Pressing tool, (20) ... spring, (A) locking tool,
(B) ... Automatic socket removal means.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nankai Nio 4-1-2 Hiranocho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd.

Claims (2)

(57) [Claims] (1) connecting portions (3, 5) to a gas main plug (1);
And a plug (6) for connecting to a socket (9) of a quick fitting provided on a hose (8) on the gas appliance (7) side, and the plug (6) is detached from the socket (9). A safety device for a gas pipe connection device provided with a seal valve (10) that automatically shuts off in accordance with the movement of the socket, wherein the pressing device (1) moves the socket (9) in a detaching direction.
9) is provided on the plug (6) in a state of being urged by a spring (20), and a locking device for holding the pressing device (19) at a non-pressing operation position allowing the mounting of the socket (9). (A) is provided, and when the pressure on the upstream side of the seal valve (10) falls below a set value, the lock (A) releases the holding of the pressing tool (19) at the non-pressing operation position. A safety device for a gas pipe connector provided with an automatic socket detaching means (B). 2. The automatic socket releasing means (B) maintains the lock (A) in a non-holding state when the pressure on the upstream side of the seal valve (10) is equal to or lower than a set value. Item 2. The safety device for a gas pipe connection device according to Item 1.