JPS628705Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a gas tank equipped with an overflow prevention valve, in particular,
This relates to a type of box that is buried in the wall and has a gas inlet at the bottom.

In this type of box stock, the gas inlet is located at the bottom of the stock pot body, and the operating knob of the stock pot and the plug of the gas pipe connector are located on the front side of the box stock.

In this type of box, an overflow prevention valve was inserted in the flow path between the closure and the plug.
It is described in Publication No. 56-30. (FIG. 1) This has the advantage that the flow path structure within the gas tank is simplified, similar to the conventional type without an overflow prevention valve. However, a sliding rod 4 is provided in one plug 1 of the gas pipe connector, which is integral with the valve body 3 that faces the valve seat 2 of the plug, and the sliding rod 4 is urged in the advancing direction and the closing mechanism is closed. The valve seat opening 5 of the overflow prevention valve A inserted upward into the downstream side of the valve A is connected to the base end 6 of the sliding rod, and the valve body 3 is connected to the socket 7 which is the other side of the gas pipe connector. When the socket is connected, the sliding rod 4 is pushed together with the valve body 3, and its base end 6 is connected to the valve seat opening 5.
When the socket 7 is removed, the proximal end 6 is located above the valve seat opening 5 and acts to reset the ball valve 8. Normally, the shaft portion 9 of the socket 7 is made of synthetic resin, and its tip is easily damaged or deformed. The base end 6 of the moving rod 4 is located near the upper part of the valve seat opening 5, and the ball valve 8 of the overflow prevention valve A is in an overflow state when the valve seat opening 5
This will cause the inconvenience of not being inserted (not working).

The object of the present invention is to reset the overflow prevention valve by rotating the closure to close, thereby preventing malfunction or non-operation of the overflow prevention valve due to damage to the shaft of the socket.

The technical means of the present invention for solving the above problems is to form an L-shaped gas flow path from the lower gas inlet to the upper plug in the gas tank main body, and insert a closure above and downstream of the gas inlet. The main body of the overflow prevention valve is inserted into the ascending flow path between the overflow prevention valve and the plug so that it can be raised and lowered, and an airtight means is provided between the outer periphery of the head of the overflow prevention valve and the flow path wall, and the valve seat opening is The main body of the overflow prevention valve is opposed to a protruding piece protruding from the flow path wall on the downstream side, and the main body of the overflow prevention valve is biased in the downward direction by a spring, and the shaft piece protruding from its lower end is located near the passage hole of the closure. The main body of the overflow prevention valve is moved upwardly by the closing rotation of the closure.

Since the present invention adopts the above technical means,
When the closure is in the open state, gas is supplied from the gas inlet to the downstream side through the overflow prevention valve and plug, and in this state, abnormal overflow conditions such as disconnection of the rubber pipe occur downstream from the plug. The ball valve fits into the valve seat opening, and the flow path inside the gas tank body is automatically shut off.

Next, when the closing member is rotated to close, the main body is lifted by the pair of the cam part and the shaft piece, and the ball valve that has been fitted into the valve seat opening is pushed in by the protruding piece protruding from the opposite wall, and the ball valve is pushed in by the protruding piece protruding from the opposite wall. The valve falls below the main body. That is, the overflow prevention valve is reset.

The present invention has the following unique effects.

Since the overflow prevention valve is reset by the closing rotation of the closure, and the overflow prevention valve is not reset in relation to the socket connected to the plug as in the conventional type described above, the shaft of the socket Malfunction or non-operation of the overflow prevention valve due to damage to the valve can be prevented.

There is no sliding rod like in conventional valves on the downstream side of the overflow prevention valve, and pressure loss due to insertion of such a member is also reduced.

Hereinafter, details of embodiments of the present invention will be explained based on the drawings.

The main body 10 of the overflow prevention valve A is composed of an upper main body 11 having a valve seat opening 5 and a cylindrical lower main body 13 which accommodates the ball valve 8 in a free state and has a shaft piece 12 protruding from its lower end. The lower main body 13 is screwed into and integrated into the upper main body 11.

A collar 14 protrudes from the lower part of the upper main body 11, and a gasket 15 that is tightly fitted onto the collar is attached to the lower part of the upper main body 11. The upper main body 1 is in contact with a seat 18 formed in the channel 17.
1 and the outer periphery of the lower main body 13 and the ascending passage 17
An appropriate gap is formed between the wall and the wall. Therefore, when the main body 10 moves upward, there is no sliding movement between the outer periphery of the main body 10 and the upward passage wall.

The wall surface facing the valve seat opening 5 becomes a blind plug 18, and a protruding piece 19 protruding from the center of this blind plug serves as a wall facing the valve seat opening 5.
A compression spring 20 is interposed between the upper main body 11 and the blind stopper 18, so that the main body 1
A descending force of 0 is given. (Fig. 2) The shaft piece 12 of the lower main body 13 is connected to the passage hole 2 of the closure 16.
Closer 16 corresponds to the cam portion 22 provided on one side of 1.
In the fully open position, the tip of the shaft piece 12 is located at the center of the passage hole 21, and when the closing member 16 is rotated to close, the cam portion engages with the shaft piece 12 to move the main body 10 upward. (Fig. 3) In the case of the above embodiment, since the main body 10 and the ascending passage wall do not slide in an airtight manner, the sliding resistance is small, and the acting force acting on the closure 16 during the reset operation of the ball valve is small. It doesn't get bigger.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is a sectional view of an embodiment of the present invention, and Fig. 3 is a sectional view taken along line X-X of the main part. , 12...shaft piece,
15...Putskin, 16...Closet, 19...Protrusion piece, 22...Cam part.

Claims (1)

[Scope of utility model registration request] An L-shaped gas flow path is formed in the gas tank body from the lower gas inlet to the upper plug to prevent excessive outflow in the ascending flow path between the plug and the closure inserted above and downstream of the gas inlet. The main body of the valve is inserted so that it can be raised and lowered, and an airtight means is provided between the outer periphery of the head of the overflow prevention valve and the flow path wall, and the valve seat opening faces a protrusion protruding from the flow path wall on the downstream side. The main body of this overflow prevention valve is biased in the downward direction by a spring, and the shaft piece protruding from the lower end faces a cam portion provided near the passage hole of the closure, and the main body of the overflow prevention valve is biased in the downward direction by a spring. A gas tank with an overflow prevention valve in which the main body of the overflow prevention valve is moved upward by rotation so that the protrusion enters or approaches the valve seat opening when the closure is fully closed.