JP3094185B2 - Overflow prevention valve reset device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for resetting an overflow prevention valve, and more particularly to an overflow prevention valve of the type incorporated in a gas stopper body, wherein the gas stopper body extends substantially from a gas inlet to an outlet. The present invention relates to a reset device for an overflow prevention valve of a type incorporated in a gas stopper formed in a straight line.

[0002]

2. Description of the Related Art Recently, various types of gas stoppers in which a cylindrical main valve slides in an axial direction to open and close a gas circuit have been proposed. There is also a type in which an overflow prevention valve inserted on the side is arranged in a straight line. As a resetting device for an overflow prevention valve incorporated in a gas stopper of this type, there has already been proposed in Japanese Utility Model Laid-Open No. 3-65071.
Even if the main valve and the overflow prevention valve are coaxial, the overflow prevention valve is reset when the main valve is opened (from the state where the overflow prevention valve is activated and the flow path is shut off, It is advantageous to return the overflow prevention valve to a non-operating state to open the flow path).

However, in this conventional device, a main valve which opens and closes in conjunction with a connection / disconnection operation of a gas pipe connector includes:
The link mechanism using many parts is interlocked, thereby resetting the overflow prevention valve, and the reset device using the link mechanism becomes very complicated,
This makes the entire gas tap expensive. The present invention has been made in view of such a point, and is described as follows. "In a gas stopper main body in which a hose end and a gas inlet portion are arranged on a substantially straight line, upstream of a main valve for opening and closing a gas circuit in the gas stopper main body. A reset device for an overflow prevention valve which is provided between the main valve and the overflow prevention valve and which resets the overflow prevention valve when the main valve opens and closes. " It is an object of the present invention to simplify the work of assembling the gas plug body and simplify the work of assembling the gas stopper body.

[0004]

Technical Means The technical means of the present invention for solving the above-mentioned problem is that the main valve (1) is housed in a gas stopper body (2) so as to be movable in the axial direction, and a hose is provided. End
The gas pipe connector is connected to the socket (3) and connected to the socket (3) so that the valve is kept open and the valve is closed by removing the socket (3), and the upstream end of the main valve is moved. A space (22) for accommodating the reset rod (4) is provided on the side of the area, and an overflow prevention valve (5) is incorporated upstream of the space (22). A gas inlet (23) communicating with the hose end (21) and located substantially coaxially with the hose end (21) is formed on the upstream side of the built-in portion of the main valve (1). twenty two)
The reset rod (4) has a base end (40) fixed to the upstream end of the vacant chamber (22) and on the wall opposite to the protrusion (11). The reset rod (4) has a generally U-shaped leaf spring, and the range from the bent top (41) to the free end (42) of the reset rod (4) is inclined toward the movement area of the main valve (1). The projecting piece (11) pushes the free end (42) toward the base end (40) by linear movement accompanying the valve opening operation of the main valve (1), and the free end (42) has In the vacant chamber (22), a bent piece (43) bent so as to protrude downstream is formed so as to extend so as to protrude toward the base end (40), and the free end (4
When 2) is pushed into the base end (40),
(5) The actuator (51) for resetting the bent piece (43)
And in the free state, the tip of the bent piece (43) pushes the actuator (51) upstream. "
That is.

[0005]

The above technical means operates as follows. When the socket (3) is not connected, the main valve (1) is
In the state where the gas circuit in (2) is shut off, the protruding piece (11) is separated from the reset rod (4), the reset rod (4) is in a free state, and the tip of the bent piece (43) is The actuator (51) is depressed.

From this state, the socket is connected to the hose end (21).
When (3) is connected, the state where the main valve (1) is moved to the valve opening position is maintained, and at this time, the bent top portion of the reset rod (4) is
The protruding piece (11) comes into contact with the range from (41) to the free end (42), and pushes the free end (42) toward the base end (40), whereby the bent piece (43) The curved portion that is convex on the downstream side coincides with the actuator (51), and the actuator (51) is set in a state where it is not pushed. That is, the actuator (51) is set to the non-reset position. In this state, the gas circuit in the gas stopper main body (2) is open, and in an overflow state, the overflow prevention valve (5) becomes operable.

When the socket (3) is removed in this state, the gas circuit in the gas plug body (2) is shut off by the return of the main valve (1), and at the same time, the reset rod (4) returns to the free state. The tip of the bending piece (43) pushes the actuator (51), and the overflow prevention valve (5) is reset.

[0008]

[Effect] An empty room (22) is formed beside the moving area of the projecting piece (11),
A reset rod (4) having a U-shape as a whole and having only a bent piece (43) protruding from the free end (42) is accommodated and fixed in the empty chamber (22) to reset the overflow prevention valve. Since the mechanism is formed, the reset device is simplified, and the assembling operation thereof is also simple.

[0009]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, as shown in FIG. 1, a sliding plug (1a) as a main valve (1) is axially moved by a shaft (31) of a socket (3) connected to a hose end (21). The valve is slid to open and close the gas circuit in the gas stopper body (2), and by this opening and closing operation, the actuator (51) of the overflow prevention valve (5) is advanced and retracted to set the reset state and the non-reset state. Things.

The stopper (1a) is provided so as to slide in the axial direction in a valve chamber (20) provided continuously upstream of the hose end (21). Vacancies (22) are formed to communicate laterally. The stopper (1a) is normally urged in a valve closing direction by a spring (12), and an auxiliary valve element (14) is provided on a valve shaft (13) protruding from a downstream side of the stopper (1a). It is installed continuously.
The auxiliary valve body (14) contacts a valve seat (24) formed at the downstream end of the hose end (21). The configuration of the socket (3) and the outer peripheral shape of the hose end (21) are the same as those of a known gas pipe connector, and the cylindrical socket (3)
Is externally connected to the hose end (21), the socket (3) and the hose end (21) are maintained in a connected state. At this time, the shaft portion (31) projecting from the center of the socket (3) enters the hose end (21) to a certain degree. Also socket
At the end of the outer periphery of (3), an advance / retreat cylinder (32) is provided, which is in an advanced state.When the socket (3) is removed, the advance / retreat cylinder (32) is moved toward the socket (3). When pushed in, the lock mechanism with the hose end (21) built in the socket (3) is released, and the socket (3) comes off from the hose end (21).

When the socket (3) is connected to the hose end (21), the shaft portion (31) pushes the auxiliary valve element (14) to open it, and the plug (1a) moves to the upstream side. After being moved, the valve chamber (20) and the hose end (21) communicate with each other from the empty chamber (22), the gas circuit in the gas cock body (2) is opened, and when the socket (3) is removed, the spring ( The stopper (1a) and the auxiliary valve body (14) return to the downstream side by 12), the stopper (1a) returns to the valve closing position (the position indicated by the solid line in FIG. 1), and the auxiliary valve body (14) moves to the valve seat. (2
The gas circuit in the gas plug body (2) is cut off doubly in contact with (4).

The reset rod (4) is accommodated in an empty chamber (22) provided parallel to the side of the valve chamber (20). An expanded vacant chamber is formed on the upstream side of the downstream body (2a) having the hose end (21), and a plug (2c) having an overflow prevention valve (5) built in the expanded vacant chamber. The downstream opening of the upstream body (2b) having a gas inlet (23) in the stopper housing is closed to the upstream end of the downstream body (2a) in an outer periphery airtight state. When the upstream end of the downstream main body (2a) is closed by the plug (2c), the reset rod (4) is attached to the empty space (22) in advance.

The reset rod (4) is configured such that a leaf spring having a fixed width is bent in a U-shape as a whole from a base end (40) to a bent top (41) and a free end (42). The extended tongue piece (44) is bent outward at a substantially right angle from the base end (40), and this extended tongue piece (44) is plugged into the upstream end opening of the downstream body (2a) with a plug (2c). ) When attaching and fixing
The reset rod (4) is pinched by the contact portion between the two, whereby the reset rod (4) is positioned and the mounting posture is fixed. At this time, the extension tongue piece (44) is caulked to the end surface of the open end of the empty chamber (22) in the downstream body (2a), and then the plug (2c) is opened to open the downstream body (2a). You may make it attach and fix to an end part.

The reset rod (4) thus mounted
Extends from the upstream end of the empty room (22) to the downstream side, and then bends upstream at the bent top (41), so that the range from the bent top (41) to the free end (42) is It is inclined so as to project toward the valve chamber (20). The free end (42) is located slightly downstream from the upstream end of the empty room (22), and the bent piece (4) projecting from the free end (42) toward the base end (40).
In (3), the tip (45) is in contact with the actuator (51) of the overflow prevention valve (5) located on the upstream side of the empty room (22), and pushes it. In this embodiment, the bending piece (43) is bent so as to be convex to the downstream side as a whole, but the tip portion (45) is partially bent so as to be convex to the upstream side. It has a bent end. Therefore, the bent piece (43) is substantially S-shaped as a whole. The degree of bending of the bending piece (43) toward the downstream side is determined in relation to the degree of protrusion of the actuator (51), and as described later, the bending piece (43) is based on the protruding piece (11). In the reset rod (4) pushed into the end (40) side, the actuator (51) in the protruding state is accommodated in the bent piece (43).

At the upstream end of the plug (1a), there is provided a projecting piece (11) projecting toward the vacant room (22). The tip of this projecting piece (11) has an inclined surface inclined toward the upstream side. Has become. The tip of the reset rod (4) in the range from the bent top (41) to the free end (42) projects into the movement locus of the protruding piece (11).
As a result, while the stopper (1a) moves from the valve-closing position to the valve-opening position, the reset rod (4) is released from the free state, and the distal end of the free end (42) is pushed into the base end (40). The free end (42) is restored to the free state in which the free end (42) returns to the movement locus of the protruding piece (11) by the reverse movement of the plug (1a), and at this time, the tip (45)
Pushes the actuator (51).

The overflow prevention valve (5) is provided with an operating valve that operates in an overflow state inside a cylindrical main body.
This operating valve is constantly urged to the upstream side by a predetermined urging force, and when an operating force equal to or greater than this urging force is applied in an overflow state, the operating valve is moved downstream and the cylindrical main body is moved. In this state, the internal flow path is shut off, and the operating valve and the actuator (51) are linked. The actuator (51) is constantly urged to the downstream side.In the non-reset state, the actuator (51) is separated from the operating valve, and in the reset state, the flow path is shut off. Is set to a state in which the operating valve is forcibly moved a predetermined stroke to the upstream side.

Therefore, the actuator is provided by the tip (45).
When the (51) is pushed in, the operating valve of the overflow prevention valve (5) is moved to the upstream side by a predetermined stroke from the flow path cutoff state and reset, and when the reset rod (4) is in the free state, the actuator (51) is released. ) Will return to the non-reset state. As described above, when the socket (3) is connected to the hose end (21), the free end (42) is pushed toward the base end (40) by the protruding piece (11), and the actuator (51) is not reset. At the same time, the plug (1a) opens and the gas circuit in the gas plug body (2) opens, and in this state, if an overflow condition occurs, the operating valve in the overflow prevention valve (5) operates. Overflow prevention valve (5)
Shuts off the gas circuit. Then, when the socket (3) is removed in this state, the stopper (1a) returns to the valve closed state, the reset rod (4) becomes free, and the actuator (51) is pushed in by the tip (45). Overflow prevention valve (5) is reset.

After that, when the circuit downstream of the gas tap is normally restored and the socket (3) is connected again, the bent piece (4)
3) is pushed toward the base end (40), the actuator (51) is set in a non-reset state, and the operating valve of the overflow prevention valve (5) is set in an operable state. In the above embodiment, the main valve
Although the stopper (1a) composed of a slide type sliding valve is adopted as (1), this may be used as a lift valve. Further, the actuator (51) may be a valve shaft of an operation valve built in the overflow prevention valve (5).

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a detailed view of a reset operation by a reset rod (4).

FIG. 3 is a rear view of the embodiment.

[Explanation of symbols]

 (1) ・ ・ ・ Main valve (1a) ・ ・ ・ Plug (2) ・ ・ ・ Gas plug body (21) ・ ・ ・ Hose end (3) ・ ・ ・ Socket (4) ・ ・ ・ Reset rod (22)・ ・ ・ Vacancy (21) ・ ・ ・ Hose end (11) ・ ・ ・ Protrusion piece (40) ・ ・ ・ Base end (41) ・ ・ ・ Bend top (42) ・ ・ ・ Free end (43)・ ・ ・ Bent piece (5) ・ ・ ・ Overflow prevention valve (51) ・ ・ ・ Actuator

Continuation of the front page (56) References Japanese Utility Model Sho 58-149666 (JP, U) Japanese Utility Model Utility Model 3-65071 (JP, U) Japanese Utility Model Utility Model 57-144661 (JP, U) Japanese Utility Model Utility Model 55-34033 (JP, U) , U) Actually open 58-119670 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 17/20-17/36 F16L 37/40

Claims (1)

(57) [Claims] An overflow prevention valve is provided in a gas stopper main body in which a hose end and a gas inlet portion are arranged in a substantially straight line, upstream of a main valve for opening and closing a gas circuit in the gas stopper main body. In a reset device for an overflow prevention valve which is interposed between a main valve and an overflow prevention valve and resets the overflow prevention valve when the main valve is opened and closed, the main valve (1) is provided inside the gas stopper body (2). The valve is kept open by the connection of the socket (3) of the gas pipe connector connected to the hose end (21), and the socket (3) is removed by removing the socket (3). A vacant space (22) for accommodating the reset rod (4) is provided on the side of the movement area of the upstream end of the main valve, and the spillover occurs upstream of the vacant space (22). A check valve (5) is built in and communicates with the upstream end of the built-in portion of the overflow check valve (5) and is substantially the same as the hose end (21). To form a gas inlet (23) located above, the upstream end of the main valve (1), check (22)
The reset rod (4) has a base end (40) fixed to the upstream end of the vacant chamber (22) and on the wall opposite to the protrusion (11). The reset rod (4) has a generally U-shaped leaf spring, and the range from the bent top (41) to the free end (42) of the reset rod (4) is inclined toward the movement area of the main valve (1). The projecting piece (11) pushes the free end (42) toward the base end (40) by linear movement accompanying the valve opening operation of the main valve (1), and the free end (42) has In the vacant chamber (22), a bent piece (43) bent so as to protrude downstream is formed so as to extend so as to protrude toward the base end (40), and the free end (4
When 2) is pushed into the base end (40),
(5) The actuator (51) for resetting the bent piece (43)
A reset device for an overflow prevention valve which is located on the upstream side of the valve and in which the tip of the bent piece (43) pushes the actuator (51) to the upstream side in the free state.