JPH05340484A - Reset device for overflow preventing valve - Google Patents

Abstract

PURPOSE:To simplify a reset device for a built-in overflow preventing valve, in a linear type gas plug. CONSTITUTION:The main valve of a gas plug forms a linear movement type and an annular body 40 moved in the same direction by means of the main valve is arranged upper stream from a plug holding part 20 in which the main valve is contained. An annular protrusion part 25 is formed in a position concentric to an annular body 40, and an actuator 51 for an over-outflow preventing valve 5 is protruded in the annular protrusion part. A reset lever 4 deformed in a resilient deformation state such that a central part is resiliently deformed from an initial set state to the downstream side through movement of the annular body 40 is arranged in a state that it is positioned at a boundary part between the annular protrusion part 25 and the annular body 40 and on the diameter line thereof. This constitution resets the excessive outflow preventing valve during closing operation of a main valve 1 and sets the valve to a non-reset state during opening operation.

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 a type built into a gas stopper body, in which the gas stopper body extends from a gas inlet to an outlet. The present invention relates to a reset device for an overflow prevention valve of a type built into a gas stopper that is linearly configured.

[0002]

2. Description of the Related Art Recently, various types of gas plugs have been proposed in which a columnar main valve slides in an axial direction to open and close a gas circuit. In this case, the main valve and its upstream side are proposed. There is also a type in which the overflow prevention valve inserted on the side is arranged in a straight line. As a reset device for the overflow prevention valve built in the gas plug 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 closed (from the state in which the overflow prevention valve is activated and cuts off the flow path, It is advantageous to return the overflow prevention valve to the non-operating state to open the flow path).

However, in this conventional one, the main valve which is opened / closed in conjunction with the connection / detachment operation of the gas pipe connector is
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,
For this reason, the entire gas plug becomes expensive. The present invention has been made in view of the above-mentioned point, "in a gas plug body in which a hose end and a gas inlet are arranged in a substantially straight line, an upstream of a main valve for opening and closing a gas circuit in the gas plug body. Reset device for an overflow prevention valve, which has a built-in overflow prevention valve on its side, is interposed between the main valve and the overflow prevention valve, and resets the overflow prevention valve when the main valve is opened and closed. It is an object of the present invention to simplify the above and to simplify the assembling work into the gas stopper body.

[0004]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "a main valve (1) is housed in a gas plug main body (2) so as to be movable in an axial direction, and a hose. End
(21) is connected to the socket (3) of the gas pipe connector to maintain the valve open state and is closed by removing the socket (3), in series with the main valve and upstream thereof. Insert the overflow prevention valve (5) into the
An empty chamber communicating with the main valve accommodating portion is provided on the downstream side of the accommodating portion of (5), and an annular convex portion (25) protruding downstream is provided on the inner circumference of the annular wall at the upstream end of the empty chamber. An annular body (40) that moves forward and backward in the same direction in conjunction with the main valve (1) is housed between the annular protrusion (25) and the main valve (1) in a concentric state with the annular protrusion (25). Then
The diameter of the annular body (40) is set to be larger than that of the annular convex portion (25), and the annular convex portion (25) and the annular body (40) are located on the diameter line at the boundary between them. A reset rod (4) made of a band-shaped elastic material is provided, and both ends of the reset rod (4) are brought into contact with the end face of the annular body (40) to form the annular body.
By moving (40) to the upstream side, both ends of the reset rod (4) are pushed to the upstream side for a constant stroke and the reset rod is moved.
The central part of (4) is elastically deformed so as to project to the downstream side, and the elastic deformation degree of this central part is such that in the initial set state, the central part of the reset rod (4) has the overflow prevention valve (5). The reset actuator (51) is pushed to the upstream side in the reset state, and in the elastically deformed state, the central portion of the reset rod (4) is in the non-reset state separated from the actuator (51) to the downstream side. I did that.

[0005]

The above technical means operates as follows. When the socket (3) is not connected, the main valve (1) is
(2) In the state where the gas circuit inside is cut off, the annular body (40)
Is located at the downstream end of the moving area and does not push in both ends of the reset rod (4). Therefore, the reset rod (4) is in the initial set state, and the central portion thereof is in the reset state in which the actuator (51) of the overflow prevention valve (5) is pushed.

From this state, when the socket (3) is connected to the hose end (21), the main valve (1) is maintained in the state of being moved to the valve opening position, and at this time, the annular body (40) is The reset rod (4) is moved to the upstream side of the constant stroke from the above state and both ends of the reset rod (4) are pushed to the upstream side. Since the annular projection (25) is concentrically arranged on the inner peripheral side of the upstream end surface of the annular body (40), this pushing causes the central portion of the reset rod (4) to project downstream. The elastically deformed state is brought about, and in this state, the central portion of the reset rod (4) is separated from the actuator (51). Therefore, the actuator (51) is set to the non-reset position. In this state, the gas circuit in the gas stopper body (2) is open, and when the overflow state occurs, the overflow prevention valve (5) becomes operable.

When the overflow prevention valve is in operation, the socket
When (3) is removed, the gas circuit inside the gas stopper body (2) is
It is shut off by the return of (1), and at the same time, the reset rod (4) returns to the initial set state and the central part of the reset rod (4)
Push in 1) to reset the overflow prevention valve (5).

[0008]

[Effect] An empty chamber is formed between the upstream side of the main valve (1) and the accommodating portion of the overflow prevention valve (5), and the reset rod (4) made of a band-shaped elastic material is provided in this empty chamber. An annulus (4
Since the reset mechanism of the overflow prevention valve is formed only by interposing 0), the reset device is simplified and the assembling work thereof is also easy.

An annular body that moves in the same direction as the main valve (1)
(40) is provided, and the reset rod (4) made of a band-shaped elastic material is only interposed at the boundary between this and the annular convex portion (25), so that the annular convex portion (25) and the main valve (1) are The vacant space between the container and the container can be set small, and the overall size can be reduced.

[0010]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. In this embodiment, as shown in FIGS.
Shaft (31) of socket (3) connected to hose end (21)
The sliding type plug (1a) as the main valve (1) slides in the axial direction to open and close the gas circuit in the gas plug body (2). ) The actuator (51) is moved back and forth to be set to the reset state and the non-reset state.

The plug (1a) is held so as to slide in the axial direction by a cylindrical plug holding portion (20) formed continuously on the upstream side of the hose end (21). A ring-shaped empty chamber (22) is formed on the outer periphery of the upstream side of the stopper holding portion (20) except for a certain range on the downstream end side, and the stopper holding portion (20) which coincides with this empty chamber (22). As shown in FIG. 2, the side wall of the has open portions (20a) (20a) extending in the axial direction at a plurality of locations,
The plug holding portion (20) and the vacant chamber (22) communicate with each other through this opening portion. Further, the stopper (1a) is constantly urged in the valve closing direction by the spring (12), and the auxiliary valve body (14) is attached to the valve shaft (13) protruding from the downstream side of the stopper (1a). It is lined up. The auxiliary valve body (14) contacts the valve seat (29) formed at the downstream end of the hose end (21). The structure of the socket (3) and the outer peripheral shape of the hose end (21) are the same as those of the known gas pipe connector, and the cylindrical socket (3) is attached to the hose end (21). When the connection is made, the socket (3) and the hose end (21) are maintained in the connected state. At this time, the shaft portion (31) protruding from the center of the socket (3) enters the hose end (21) to a certain degree. Also socket
A forward / backward moving cylinder (32) is provided at the tip of the outer periphery of (3) and is in the advanced state.When removing the socket (3), move the forward / backward moving cylinder (32) to the socket (3) side. When pushed in, the lock mechanism with the hose end (21) built into this socket (3) is released and the socket (3) is released from the hose end (21).

With the above structure, when the socket (3) is connected to the hose end (21), the shaft portion (31) pushes the auxiliary valve body (14) to open it, and the plug (1a) moves to the upstream side. Is moved to the open part (20a) (20a) of the stopper holding part (20) from the empty room (22).
And the hose end (21) communicate with each other to open the gas circuit inside the gas stopper body (2), and when the socket (3) is removed, the spring (1
2) The stopper (1a) and the auxiliary valve body (14) are returned to the downstream side, and the stopper (1a) is returned to the valve closing position (the position shown by the solid line in Fig. 1) at the downstream end of the stopper holder (20). And the auxiliary valve body (14) has a valve seat (29)
The gas circuit in the gas stopper body (2) is double cut off by being contacted with.

The reset device comprises a reset rod (4) and an annular body.
(40), which are housed in the vacant chamber (24) provided upstream of the vacant chamber (22). The gas stopper body (2) of this embodiment comprises the hose end (21) and the stopper (1
(a) built-in tubular main body (2a) upstream of the hose end, with built-in overflow prevention valve (5) and gas inlet (23)
The downstream side tubular portion of the upstream main body (2b) provided with is fitted and fixed to the outer peripheral airtight state, and the empty chamber (24) is formed in the middle of the upstream main body (2b). ..

The overflow prevention valve (5) is housed and fixed on the downstream side of the gas inlet (23) in succession.
The vacant chamber (24) is formed on the downstream side in the vicinity of the end face on the downstream side of the tubular main body (50) of (5). Then, the annular convex portion (25) projects downstream from the inner peripheral edge of the annular wall surface at the upstream end of the empty chamber (24), and the boundary portion with the empty chamber (22) at the downstream end of the plug holding portion (20). An annular pad plate (26) is fixed to the pad plate, and the pad plate (26) is
As shown in FIG. 5, a large number of openings (27), (27) are formed through.

The inner diameter of the empty chamber (24) is substantially equal to the diameter of the annular body (40), while the axial length is the annular body (40).
It is set to be slightly larger than the axial length of the. Then, the reset rod (4) is a straight plate spring having a constant width band as shown in FIG. 3, which is interposed between the annular convex portion (25) and the upstream end surface of the annular body (40). ing. still,
The length of the reset rod (4) is made substantially equal to the diameter of the annular body (40), and the upstream end surface of the plug holding portion (20) is not symmetrical to each other as shown in FIG. The reset rod in position
Providing notches (41) and (41) that match the width of (4),
Since the distance from the end surface of the annular convex portion (25) to the contact plate (26) is matched with the axial length of the annular body (40) to the cutout portion (41), the vacant chamber (24) When the reset rod (4) and the ring-shaped body (40) are housed in the reset rod (4), the ring-shaped protrusion (2)
5) and on the diameter line of the annular body (40), and the annular body (40) is sandwiched between the contact plate (26) and both ends of the reset rod (4).

Further, a disc portion (43) having a plurality of openings (42) (42) is continuously provided at the downstream end of the annular body (40),
The cylindrical shaft portion (44) projects from the center of the disc portion (43) to the downstream side through the central opening of the contact plate (26). And this cylinder shaft part (44)
Has one end at the base end of the cylindrical shaft portion (44) or the disc portion (43).
A cushion spring (45) fixed to the cushion spring (45) is provided, and a tip end portion of the cushion spring (45) projects further downstream than the cylinder shaft portion (44).

In the vicinity of the inner peripheral edge of the contact plate (26), a stopper (1
The above-mentioned spring (12) for biasing a) in the valve closing direction is interposed between the spring (12) and the plug (1a). With the above configuration, the stopper (1a) is normally biased in the valve closing direction, and the stopper holding portion (20) and the openings (42) (42) are provided between the stopper holding portion (20) and the gas inlet (23). , Opening (27) (27),
It communicates with each other through the vacant room (22) and the opening parts (20a) (20a). When the stopper (1a) is located at the downstream end of the stopper holder (20), the gas circuit in the gas stopper main body (2) is interrupted at this portion, and the stopper (1a) moves from this position to the spring. When it is moved upstream of the constant stroke against (12), the stopper (1a) opens.
(20a) Located on the upstream side of the formation area of (20a) Gas main body (2)
The gas circuit inside communicates.

At the valve closing position of the stopper (1a), the annular body (4
The downstream end face of (0) is in contact with the contact plate (26), and at this time, the reset rod (4) is in a straight line state, and the overflow prevention valve
The mounting position of the overflow prevention valve (5) is set so that the actuator (51) of (5) is pushed a certain amount upstream. Further, as described above, when the plug (1a) is moved to the valve opening position, the upstream end surface of the plug (1a) pushes the cushion spring (45) by a certain stroke. As a result, the annular body (40) is moved to the upstream side, and the central portion of the reset rod (4) is curved to the downstream side. In this curved state, the central portion of the reset rod (4) is separated from the tip end portion of the actuator (51) toward the downstream side, and therefore, the movement amount of the annular body (40), the diameter of the annular convex portion (25), etc. Is set to a predetermined value, and the annular protrusion (25) and the annular body (4
It is determined by the relationship with the values such as the position of 0) with the upstream end and the mounting position of the overflow prevention valve (5).

From these facts, when the socket (3) is connected to the hose end (21), the auxiliary valve body is urged by the shaft portion (31).
(14) and the stopper (1a) are pushed to move the stopper (1a) to the valve opening position, and at the same time, the action spring (45) is pushed by the stopper (1a) to move the annular body (40) to the upstream side. As shown in FIG. 2, the reset rod (4) is curved downstream so that the actuator (51) and the central portion of the reset rod (4) are separated from each other. As a result, the overflow prevention valve (5) becomes operable.

After that, when the overflow state occurs, the operating valve in the overflow prevention valve (5) is actuated and the gas circuit is closed.
(2) It is shut off in Then, when the socket (3) is removed in this state, the stopper (1a) returns to the valve closed state, the annular body (40) also returns to the initial position, and the reset rod (4) becomes the straight state and its center The part pushes the actuator (51) to reset the overflow prevention valve (5).

After that, when the circuit on the downstream side of the gas stopper is normally restored and the socket (3) is connected again, both ends of the reset rod (4) are pushed by the annular body (40), The central part of the reset rod (4) projects to the downstream side, becomes a non-reset state apart from the actuator (51), and the overflow prevention valve
The operation valve of (5) is set to the operable state. In the above-mentioned embodiment, the main valve (1) is the plug (1a) which is a slide type sliding valve, but it may be a lift valve. Further, the actuator (51) may be a valve shaft of an operation valve built in the overflow prevention valve (5). Also, reset rod
The wire (4) may be a wire made of an elastic material, and is not necessarily linear.

In particular, in this embodiment, since the pushing force of the annular body (40) by the plug (1a) is transmitted through the cushion spring (45), there are variations in the size of each part. However, the unreasonable force does not act on the reset rod (4) or the stopper (1a). Therefore, it can withstand long-term use. Needless to say, rod-shaped rubber or sponge may be used instead of the cushion spring (45).

Further, in this embodiment, the upstream main body (2b) is provided with the overflow prevention valve (5), the reset rod (4) and the annular body (40), and the downstream main body (2a) is plugged. The gas plug is completed by inserting and screwing the downstream main body (2a) into the upstream main body (2b) with the (1a) incorporated and the (12) interposed. The fitting portion between the downstream main body (2a) and the upstream main body (2b) has two O
Sealed by ring (P) (P).

[Brief description of drawings]

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

[Fig.2] Detailed view of reset operation by the reset rod (4)

FIG. 3 is a perspective view of the reset rod (4).

FIG. 4 is a perspective view of the annular body (40).

FIG. 5 is a perspective view of the backing plate (26).

[Explanation of symbols]

 (1) ・ ・ ・ Main valve (1a) ・ ・ ・ Plug (2) ・ ・ ・ Gas stopper body (21) ・ ・ ・ Hose end (3) ・ ・ ・ Socket (4) ・ ・ ・ Reset rod (22)・ ・ ・ Vacancy (40) ・ ・ ・ Annular body (41) ・ ・ ・ Cutout (43) ・ ・ ・ Disc (5) ・ ・ ・ Overflow prevention valve (51) ・ ・ ・ Actuator

Claims (1)

[Claims] 1. A gas outlet main body in which a hose end and a gas inlet are arranged in a substantially straight line, a built-in overflow prevention valve upstream of a main valve for opening and closing a gas circuit in the gas stopper main body, In the overflow prevention valve reset device which is interposed between the main valve and the overflow prevention valve and resets the overflow prevention valve when the main valve is opened / closed, the main valve (1) is installed inside the gas tap body (2). It is housed so as to be movable in the axial direction, and is kept open by connecting the socket (3) of the gas pipe connector connected to the hose end (21) and by removing the socket (3). The valve is configured to be closed, and an overflow prevention valve (5) is inserted in series with the main valve and upstream thereof, and the main valve accommodating portion is provided downstream of the accommodating portion of the overflow prevention valve (5). An empty chamber is provided for communication, and an annular convex portion (25) protruding downstream is provided on the inner circumference of the annular wall at the upstream end of the empty chamber, An annular body (40) that advances and retreats in the same direction in conjunction with the main valve (1) between the annular projection (25) and the main valve (1) is concentric with the annular projection (25). Accommodate, the diameter of this annular body (40) is set larger than that of the annular convex portion (25), the annular convex portion (25) and the annular body (40)
A reset rod (4) made of elastic material in the form of a belt located on these diameter lines is provided at the boundary with the reset rod.
The reset rod (4) is caused by moving both ends of (4) to the end face of the annular body (40) and moving the annular body (40) to the upstream side.
Both ends of the reset rod (4) are pushed forward by a constant stroke so that the center portion of the reset rod (4) is elastically deformed so as to project to the downstream side. 4) Central part is overflow prevention valve
In the reset state in which the actuator (51) for resetting of (5) is pushed upstream, and in the elastically deformed state, the reset rod
A device for resetting an overflow prevention valve, wherein a central portion of (4) is in a non-reset state separated from the actuator (51) to a downstream side.