JP2014190456A - Gas cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cock capable of appropriately preventing gas from flowing out in a closure state of the gas cock.SOLUTION: A tubular member H1 having at least either one side of an upstream side gas inflow part H1a located on the upstream side of a gas channel 1 and a downstream side gas outflow part H1b on a tube lateral surface is provided in such a state that an axial center of the tubular member is arranged along a gas flow direction, and in such a state that all gas flowing through the gas channel 1 flows in from the upstream side gas inflow part H1a and flows out from the downstream side gas outflow part H1b. Further, a sliding member R1 capable of freely performing switchover of at least either one side of the upstream side gas inflow part H1a and the downstream side gas outflow part H1b into a closure state and an open state corresponding to movement between a closure position and an open position of a slide valve G in such a state as to be arranged along a tube lateral surface of the tubular member H1 is provided.

Description

  The present invention relates to a gas stopper provided with a slide valve that is movable in the axial direction of a gas stopper body between a closed position and an open position in a gas stopper body in which a gas flow passage is formed.

Conventionally, as a gas stopper to which a gas connector provided at the tip of a gas cord is attached, a slide valve that moves between an open position that opens the gas flow path and a closed position is provided inside the gas flow path. In addition, there is known one that switches between a state in which the outflow of gas from the gas flow passage is allowed and a state in which the gas is stopped (see Patent Document 1).
In the gas stopper, the state of stopping the outflow of gas from the gas flow passage is realized by a seal between the inner peripheral surface of the gas flow passage and the outer peripheral surface of the slide valve.

  In addition, as another structure of the gas plug, as shown in FIG. 6 of the said patent document 1, it does not open and close a gas plug by mounting | wearing / non-mounting | wearing of the gas connection tool 100, but the operation part provided in the gas plug The gas stopper is opened and closed by pressing B. There is a so-called push-push type gas stopper.

JP 2012-207780 A

  In the technology disclosed in Patent Document 1, since the outflow of gas from the gas flow passage is stopped only by the seal between the inner peripheral surface of the gas flow passage and the outer peripheral surface of the slide valve, for example, the slide valve When there is a foreign object between the inner peripheral surface of the gas flow passage and the outer peripheral surface of the slide valve when the valve moves from the open position to the closed position, there is a risk that the seal will be incomplete. .

  This invention is made | formed in view of the above-mentioned subject, The objective is in the point which provides the gas stopper which can perform sealing more reliably in the closed state.

The gas stopper to achieve the above purpose is
A gas stopper provided with a slide valve that is movable in the axial direction of the gas stopper main body between a closed position and an open position in a gas stopper main body in which a gas flow path is formed.
A cylindrical member provided on the outer peripheral surface thereof with at least one of an upstream gas inflow portion located upstream of the gas flow passage and a downstream gas outflow portion located downstream of the gas flow passage; In a state where the cylinder axis is aligned with the axial direction of the gas plug body, and all of the gas flowing through the gas flow passage flows in from the upstream gas inflow portion and out of the downstream gas outflow portion. Prepared,
Corresponding to the movement between the closed position and the open position of the slide valve in a state along the outer peripheral surface of the cylindrical member, at least one of the upstream gas inflow portion and the downstream gas outflow portion One of them is that a sliding member that can be switched between a closed state and an open state is provided.
In addition, the outer peripheral surface of a cylindrical member shall mean the outer surface except the both end surfaces.

According to the above characteristic configuration, since the cylindrical member is provided in a state where its cylindrical axis is aligned with the axial direction of the gas plug body, the sliding member is moved between the closed position and the open position of the slide valve. Corresponding to the outer circumferential surface of the cylindrical member.
The outer peripheral surface of the cylindrical member is provided with at least one of an upstream gas inflow portion located upstream of the gas flow passage and a downstream gas outflow portion located downstream of the gas flow passage. Therefore, the sliding member causes at least one of the upstream gas inflow portion and the downstream gas outflow portion to be in a closed state and an open state corresponding to the movement between the closed position and the open position of the slide valve. Can be switched to.
That is, in the gas stopper having the above-described characteristic configuration, the closed state of the gas flow passage is added to the seal between the inner peripheral surface of the gas flow passage and the outer peripheral surface of the slide valve, or the upstream gas inflow portion or the downstream side. Since at least one of the side gas outflow portions can be sealed by the sliding member, the sealing can be more reliably performed.

Further features of the gas stopper of the present invention are as follows:
The cylindrical member includes the upstream gas inflow portion on the upstream end surface thereof, and the downstream gas outflow portion on the outer peripheral surface thereof.
The sliding member is configured to switch between a closed state in which the downstream gas outflow portion is closed and an open state in which the downstream gas outflow portion is opened in response to movement between the closed position and the open position of the slide valve.

  According to the above characteristic configuration, the upstream end surface of the tubular member is provided with the upstream gas inflow portion, the outer peripheral surface thereof is provided with the downstream gas outflow portion, and the sliding member is provided on the outer peripheral surface of the cylindrical member. Since the downstream gas outflow portion provided is opened and closed, the pressure loss of the gas can be reduced as compared with the configuration in which the upstream gas inflow portion is also provided on the outer peripheral surface.

Further features of the gas stopper of the present invention are as follows:
Inside the cylindrical member, an overflow prevention valve for preventing excessive outflow of gas, and a reset member for performing a reset operation for resetting the overflow prevention valve in an activated state to an inoperative state are provided.
The sliding member is provided with a stepped portion that forms a step in a cylinder radial direction of the cylindrical member at a portion facing the downstream gas outflow portion in a closed state in which the downstream gas outflow portion is closed,
As the downstream gas outflow portion of the sliding member is switched between a closed state and an open state, the reset member comes into contact with the stepped portion and the reset operation is executed.
Here, the operating state of the overflow prevention valve is a state in which the overflow prevention valve prevents an excessive outflow of gas, and the inoperative state means that the overflow prevention valve prevents an excessive outflow of gas. It is not in the state.

According to the above characteristic configuration, the tubular member is provided with the overflow prevention valve and the reset member that performs the reset operation of the overflow prevention valve, thereby achieving compactness.
Further, the sliding member is provided with a step portion that forms a step in the cylinder radial direction of the cylindrical member at a portion corresponding to the downstream gas outflow portion in a closed state in which the downstream gas outflow portion is closed. As the downstream gas outflow portion of the member is switched between the closed state and the open state, the reset member can come into contact with the stepped portion to execute the reset operation.

Further features of the gas stopper of the present invention are as follows:
The sliding member is characterized in that the inner peripheral surface has a clamp shape that sandwiches the outer peripheral surface of the cylindrical member.

  According to the above characteristic configuration, the sliding member has a clamp shape in which the inner peripheral surface sandwiches the outer peripheral surface of the cylindrical member, so that the sliding member faces the downstream opening of the cylindrical member. When positioned, the downstream opening by the sliding member can be more reliably sealed.

Sectional drawing which shows the state from which the gas connector was removed from the gas stopper which concerns on 1st Embodiment Sectional drawing which shows the state by which the gas connection tool was mounted | worn with the gas stopper which concerns on 1st Embodiment. The perspective view of the member provided in the gas flow path Sectional drawing which shows the state by which the gas connector was removed from the gas stopper which concerns on 2nd Embodiment. Sectional drawing which shows the state by which the gas connection tool was mounted | worn with the gas stopper which concerns on 2nd Embodiment. State transition diagram of the gas stopper according to the second embodiment

<First Embodiment>
The gas stopper 200 of the present invention relates to a gas stopper that can perform sealing more reliably in its closed state.
As shown in FIGS. 1 and 2, the gas stopper 200 includes a cylindrical gas stopper body 2 in which the gas flow passage 1 is formed, and the gas connector 100 is attached to the gas stopper body 2. Then, the slide valve G provided in the gas flow passage 1 opens the gas flow passage 1, and the gas flows through the gas flow passage 1, so that the gas appliance (not shown) connected to the gas connector 100. By removing the gas connector 100 from the gas plug body 2, the slide valve G provided in the gas flow passage 1 closes the gas flow passage 1 and stops the gas flow in the gas flow passage 1. And it is comprised as what is called a gas outlet which stops the gas supply to a gas appliance. FIG. 1 shows a state where the gas connector 100 is removed from the gas plug body 2, and FIG. 2 shows a state where the gas connector 100 is attached to the gas stopper body 2.

The gas connector 100 that can be attached to and detached from the gas plug body 2 will be described. Since the gas connector 100 has a known configuration, a detailed description thereof will be omitted and will be briefly described.
In the gas connector 100, the positions of the protruding member 102, the locking ball 103, and the locking ball 103 urged forward by the first coil spring 101 (the base end side of the arrow X in FIGS. An inner diameter member 104 that is regulated from the inner side in the direction and that is pressed against the tip of the gas plug main body 2 and retracted, and a rod-shaped pressing portion 105 that presses the slide valve G when the gas plug main body 2 is mounted. And.

  When the gas connector 100 is attached to the gas plug main body 2, as shown in FIGS. 1 and 2, the distal end portion of the gas plug main body 2 abuts on the inner diameter member 104, and the inner diameter member 104 is used as a biasing force of the second coil spring 106. Retire against. When the inner diameter member 104 is retracted, the locking ball 103 moves inward in the radial direction, the locking ball 103 is fitted into the fitting groove 2 a formed in the gas plug body 2, and the protruding member 102 is the first coil spring 101. It projects to the front side (the base end side of the arrow X in FIGS. In this way, the gas connector 100 is externally attached to the gas plug body 2. When the gas connector 100 is attached to the gas plug body 2, the slide valve G is pressed by the pressing portion 105 of the gas connector 100. By the pressing of the pressing portion 105 against the slide valve G, the slide valve G moves to the upstream side of the gas flow passage 1 along the axial direction of the gas plug body 2 (the base end side of the arrow X in FIGS. 1 and 2). Thus, the gas flow passage 1 is opened and the gas is supplied to the gas appliance.

  When removing the gas connector 100 from the gas plug body 2, by pushing the protruding member 102 against the urging force of the first coil spring 101 (pushing operation toward the tip side of the arrow X in FIGS. 1 and 2), Since the fitting of the locking ball 103 into the fitting groove 2a is released, the gas connector 100 can be removed from the gas plug body 2. Then, when the gas connector 100 is removed from the gas plug main body 2, the pressing by the pressing portion 105 against the slide valve G is released, and the slide valve G is rotated by the urging force of the first urging member F1. It moves to the downstream side of the gas flow passage 1 along the direction (the tip end side of the arrow X in FIG. 2), returns from the open position to the closed position, and the gas flow passage 1 is closed.

The gas flow passage 1 is provided with a cylindrical member H1 and a sliding member R1 constituting a seal mechanism on the upstream side of the slide valve G.
The gas flow passage 1 has a circular cross section, and is provided in a straight line along the axial direction of the gas plug main body 2 (the direction along the arrow X in FIGS. 1 and 2). The direction and the gas flow direction of the gas flow passage 1 are the same direction. The gas flow passage 1 includes a first flow path portion 1a, a second gas flow passage portion 1b, a third flow passage portion 1c, in order from the upstream side in the gas flow direction, as a plurality of flow passage portions having changed flow passage diameters. A fourth flow path part 1d and a fifth flow path part 1e are provided. The first flow path portion 1a communicates with a gas inflow portion (not shown), and the second gas flow path portion 1b is formed with a flow path diameter smaller than that of the first flow path portion, and is a cylindrical member. The leg portion H5 of H1 is screwed. A cylindrical member H1 is disposed from the second gas flow path part 1b to the third flow path part 1c, and a sliding member R1 is disposed in the third flow path part 1c. The fourth flow path portion 1d is configured to have a flow path diameter smaller than that of the third flow path portion 1c, and the fifth flow path portion 1e is formed in an inclined shape that decreases the flow path diameter from the upstream side to the downstream side. The gas outlet body 3 communicates with a gas outlet 3 formed at the distal end portion. A slide valve G that is slidable is provided from the third flow path part 1c to the fifth flow path part 1e.

The slide valve G is slidably movable along a valve body G1 that can close the fifth flow path portion 1e in the gas flow passage 1 and an inner peripheral surface of the third flow path portion 1c in the gas flow passage 1. And a sliding portion G2.
The valve body G1 is provided so as to be movable along the axial direction of the gas plug main body 2 over the fifth flow path part 1e and the fourth flow path part 1d. The outer diameter of the upstream portion of the valve body portion G1 is the same as the flow passage diameter of the fifth flow passage portion 1e, and the valve seat portion on which the valve body portion G1 is seated is an inclined portion of the fifth flow passage portion 1e. Configured. The valve body G1 is urged so as to return to the closed position by the first urging member F1, and when the gas connector 100 is detached from the gas plug body 2, the valve body G1 is closed (shown in FIG. 1). When the gas connector 100 is mounted on the gas stopper main body 2, the fifth flow path portion 1e is closed at the position (position), and is located at the open position (position shown in FIG. 2). The 5 flow path part 1e is opened.
The sliding part G2 is connected to the valve body part G1 at the shaft part G3, and the outer peripheral surface thereof has a hollow ring shape along the inner peripheral surface of the gas flow passage 1, and the closed position of the valve body part G1 Along with the movement to the open position, the gas flow passage 1 slides and moves along the inner peripheral surface of the third flow path portion 1c of the gas flow passage 1.

  The cylindrical member H1 is disposed from the second gas flow path part 1b to the third flow path part 1c of the gas flow passage 1, and has an upstream gas inflow portion H1a at the upstream end thereof and the downstream side of the cylindrical side surface thereof. A cylindrical member H1 having a gas outflow portion H1b is provided. In the cylindrical member H1, all the gas flowing through the gas flow passage 1 flows in from the upstream gas inflow portion H1a in a state where the cylinder axis is along the gas flow direction (the arrow X direction in FIG. 2). However, it is provided in a state of flowing out from the downstream gas outflow portion H1b. When the description is added, as shown in FIG. 2, the cylindrical member H1 has an annular leg H5 extending radially outward from the cylindrical side surface at the downstream end thereof, and the leg H5 is in gas flow. The second gas flow path part 1b of the channel 1 is screwed and connected in an airtight manner. Accordingly, the gas does not flow between the gas flow passage 1 and the cylindrical member H1, but all of the gas flows into the upstream gas inflow portion H1a of the cylindrical member H1.

As shown in FIGS. 1 and 2, the sliding member R1 is urged to the downstream side by the third urging member F3 via the ring-shaped member R5, and the upstream end thereof is the sliding portion G2 of the slide valve G. The axial direction of the gas plug main body 2 in a state along the outer peripheral surface of the cylindrical member H1 corresponding to the movement between the closed position and the open position of the valve body G1 of the slide valve G It is configured to be freely movable.
In addition, the outer peripheral surface of the cylindrical member H means the outer surface except the both end surfaces.
As shown in FIG. 3, the sliding member R <b> 1 has a clamp shape in which the inner peripheral surface sandwiches the outer peripheral surface of the tubular member H <b> 1. Thereby, the airtightness between the inner peripheral surface of sliding member R1 and the outer peripheral surface of cylindrical member H1 is improved. As a result, the sliding member R1 closes the downstream gas outflow portion H1b formed on the outer peripheral surface of the cylindrical member H1 corresponding to the movement between the closed position and the open position of the slide valve G. It is possible to switch between the state (shown in FIG. 1) and the open state (the state shown in FIG. 2).

Second Embodiment
As shown in FIGS. 4, 5, and 6, the gas stopper 200 of the second embodiment includes an excessive outflow prevention mechanism that stops the gas flow when the gas flow rate in the gas flow passage 1 becomes an overflow rate that exceeds a certain level. H and a reset means R for performing a reset operation for resetting the overflow prevention mechanism H in an activated state to a non-operated state when the gas connector 100 is detached from the gas plug body 2 are provided. Here, the reset operation is an operation of pressing the excessive outflow prevention valve H2 of the excessive outflow prevention mechanism H to the upstream side of the gas flow passage 1 (the base end side of the arrow X in FIGS. 4, 5 and 6).

The overflow prevention mechanism H includes a cylindrical member H1 disposed from the second gas flow path portion 1b to the third flow path portion 1c of the gas flow passage 1, an overflow prevention valve H2 disposed therein, and the like. Composed.
As shown in FIG. 6, the cylindrical member H <b> 1 has a non-operating state (state shown in FIGS. 6A and 6B) that allows gas flow and an operating state that blocks gas flow (shown in FIG. 6C). And an overflow prevention valve H2 that is switchable between the state and a support portion H4 that slidably supports the overflow prevention valve H2 in the axial direction of the gas plug body 2.
The support portion H4 is formed in a cylindrical shape whose inside penetrates in the axial direction of the gas plug main body 2. The upstream portion of the support portion H4 is externally fitted to the shaft portion H2a of the overflow prevention valve H2, and supports the overflow prevention valve H2 so as to be movable in the axial direction of the gas plug body 2.

  The excessive outflow prevention valve H2 is in a non-operating state (state shown in FIG. 6 (b)) located upstream from an operating state (state shown in FIG. 6 (c)) located on the downstream side by the second urging member F2. ) And is held in a non-operating state by abutting against the support portion H4. The overflow prevention valve H2 is provided so as to freely shift from the non-operating state to the operating state by the flow pressure of the gas flow rate when the gas flow rate becomes an overflow rate, and the overflow preventing valve that has shifted to the operating state is provided. The valve H2 is seated on the seating portion H6 to prevent gas flow.

  When the overflow prevention valve H2 is in an operating state and undergoes a reset operation in which the operated portion H3 bulged downstream is pressed upstream, the overflow prevention valve H2 moves upstream. Then, the seating of the overflow prevention valve H2 on the seating portion H6 is released, and the non-operating state is restored by the biasing force of the second biasing member F2.

When the gas connector 100 is detached from the gas stopper body 2, the reset means R is excessively discharged as the slide valve G moves from the open position to the closed position in the axial direction of the gas stopper body 2. In order to return the prevention valve H2 to the non-operating state (in order to reset it), a reset operation for pressing the operated portion H3 of the overflow prevention valve H2 to the upstream side of the gas flow passage 1 is performed. .
As shown in FIGS. 4, 5, and 6, the reset means R has a step portion R <b> 1 a that forms a step in the radial direction of the gas flow passage 1 on the inner peripheral surface thereof, and along the inner peripheral surface of the gas flow passage 1. A cylindrical sliding member R1 that is slidably movable, and a swinging member R2 (an example of a reset member) that is provided inside the sliding member R1 and that performs a reset operation by contacting the stepped portion R1a. It is composed of Since the configuration of the sliding member R1 is the same as that of the first embodiment except that the step portion R1a is provided, the following description focuses on the configuration related to the step portion R1a.

  The step portion R1a formed on the inner peripheral surface of the sliding member R1 has a downstream gas outflow portion when the sliding member R1 is in a closed state (state shown in FIG. 4) that closes the downstream gas outflow portion H1b. It is provided at a site facing H1b and moves upstream from a site facing downstream gas outlet H1b when it is in an open state (the state shown in FIG. 5) that opens downstream gas outlet H1b. As a result, when the sliding member R1 is in an open state in which the downstream gas outflow portion H1b is opened, the step portion R1a can come into contact with the swinging member R2 disposed inside the cylindrical member H1. Become.

  The swing member R2 is swingable about an axis P along the radial direction of the gas flow passage 1. A contact portion R2a that contacts the stepped portion R1a is provided on one end side of the swing member R2 and on the other end side. A reset operation portion R2b that performs a reset operation in contact with the operated portion H3 of the overflow prevention valve H2 is provided. The rocking member R2 is positioned by the fourth biasing member F4 such that the reset operation portion R2b is located on the side away from the operated portion H3 of the overflow prevention valve H2 (the tip side of the arrow X in FIG. 5) ( It is urged to return to the state shown in FIG.

That is, as shown in FIG. 5, when the slide valve is located at the open position and the step portion R1a of the sliding member R1 is located upstream from the portion facing the downstream gas outflow portion H1b, the swinging member R2 is Since the contact portion R2a does not contact the step portion R1a, the reset operation portion R2b is located at a position away from the operated portion H3 of the overflow prevention valve H2.
On the other hand, as shown in FIG. 4, when the slide valve G is located at the closed position and the step portion R1a of the slide member R1 is located at a portion facing the downstream gas outflow portion H1b, the swing member R2 The contact portion R2a contacts the step portion R1a, swings clockwise about the axis P, and the reset operation portion R2b moves to a position where it can contact the operated portion H3 of the overflow prevention valve H2. . In this case, if the excessive outflow prevention valve H2 is in the operating state (the state shown in FIG. 6C), the reset operation is executed.

Hereinafter, the movement of the slide valve G, the excessive outflow prevention mechanism H, and the reset means R will be described with reference to FIG.
6A shows a state in which the gas connector 100 is removed from the gas plug body 2, and FIG. 6B shows a state in which the gas connector 100 is attached to the gas stopper body 2. FIG. FIG. 6 (c) shows a state in which the overflow prevention valve H2 has shifted from the non-actuated state to the activated state when the gas connector 100 is mounted on the gas plug body 2, and FIG. The reset operation is performed when 100 is removed from the gas plug body 2.

As shown in FIG. 6A, when the gas connector 100 is removed from the gas plug body 2, the valve body G1 of the slide valve G is located at the closed position, and the inner periphery of the fifth flow path portion 1e. The gas flow path 1 is closed by the valve body G1. Further, the sliding member R1 closes the downstream gas outflow portion H1b formed on the outer peripheral surface of the cylindrical member H1 by the inner peripheral surface thereof.
That is, in the state shown in FIG. 6A, the gas flow passage 1 is a cylindrical member formed by seating on the inner peripheral surface of the fifth flow path portion 1e of the valve body G1 and the inner peripheral surface of the sliding member R1. It is securely closed by both the outer peripheral surface seal of H1.
At this time, the overflow prevention valve H2 is in an inoperative state separated from the seating portion H6, and the swinging member R2 is in contact with the step portion R1a so that the contact portion R2a is in contact with the fourth urging member F4. It swings clockwise against the force, and its reset operation part R2b is located in the proximity position close to the operated part H3 of the overflow prevention valve H2.

As shown in FIG. 6 (b), when the gas connector 100 is mounted on the gas plug body 2, the pressing portion 105 of the gas connector 100 presses the valve body G 1 of the slide valve G toward the upstream side of the gas flow passage 1. Then, the valve body G1 of the slide valve G moves from the closed position to the open position, and the gas flow passage 1 is opened. Accordingly, the sliding portion G2 of the slide valve G presses the sliding member R1 to the upstream side of the gas flow passage 1, and the downstream gas outflow portion H1b is opened.
At this time, since the contact of the step portion R1a with the contact portion R2a is released, the swing member R2 swings counterclockwise by the biasing force of the fourth biasing member F4, and the reset operation portion R2b is located at a separation position away from the operated portion H3 of the overflow prevention valve H2.

As shown in FIG. 6 (c), when a certain amount or more of gas flows through the gas flow passage 1, the overflow prevention valve H2 that has been in the non-operating state is in an operating state in which it is seated on the seating portion H6. Outflow is prevented.
In the state shown in FIG. 6C, when the gas connector 100 is removed from the gas plug main body 2, as shown in FIG. 6D, the pressing portion 105 moves upstream of the valve body G1 of the slide valve G. Is released, and the valve body G1 of the slide valve G moves from the open position to the closed position.
Along with this, the pressure on the upstream side of the sliding member R1 by the sliding portion G2 of the slide valve G is released, and the sliding member R1 moves to the closing position for closing the downstream gas outflow portion H1b of the cylindrical member H1. To do. The swing member R2 has a contact portion R2a that contacts the step portion R1a of the slide member R1 and swings clockwise, and the reset operation portion R2b is connected to the operated portion H3 of the overflow prevention valve H2. Abut closely. Thereby, the reset operation which shifts the excessive outflow prevention valve H2 of an operation state to a non-operation state is performed.

[Another embodiment]
(1)
In the embodiment described above, the reset means R that executes the reset operation of the overflow prevention valve H2 as the slide valve G moves from the open position to the close position has been described as an example.
However, the reset means R is not limited to the above-described configuration, and for example, a configuration in which the reset operation of the overflow prevention valve H2 is performed in accordance with the movement of the slide valve G from the closed position to the open position may be adopted. I do not care.

(2)
In the said embodiment, while showing the upstream gas end part H1a in the upstream end surface of the cylindrical member H1, the downstream gas outflow part H1b was shown in the outer peripheral surface of the cylindrical member H1.
As another structure of the said cylindrical member H1, you may provide both the upstream gas inflow part H1a and the downstream gas outflow part H1b in the outer peripheral surface of the cylindrical member H1.
Moreover, while providing the downstream gas outflow part H1b in the downstream end surface of the cylindrical member H1, you may provide the upstream gas inflow part H1a in the outer peripheral surface of the cylindrical member H1.

(3)
In the said embodiment, the gas flow path 1 showed the example in which the gas distribution direction was formed in the linear form along the axial center of the gas stopper main body 2. As shown in FIG. However, when the gas plug body 2 is bent in an L shape, the gas flow passage 1 may be formed in an L shape so that the gas flow direction matches the shape of the gas plug body 2.

(4)
Further, the gas stopper 200 of the present application can be applied to a push-push type gas stopper 200 as shown in FIG. 6 of Prior Art Document 1 shown in the related art.

  The gas stopper of the present invention can be effectively used as a gas stopper that can perform sealing more reliably.

1: Gas flow passage 200: Gas stopper G: Slide valve H1: Cylindrical member H1a: Upstream gas inflow portion H1b: Downstream gas outflow portion H2: Overflow prevention valve R1: Sliding member R1a: Stepped portion

Claims (4)

A gas stopper provided with a slide valve that is movable in the axial direction of the gas stopper body between a closed position and an open position in a gas stopper body in which a gas flow passage is formed,
A cylindrical member provided on the outer peripheral surface thereof with at least one of an upstream gas inflow portion located upstream of the gas flow passage and a downstream gas outflow portion located downstream of the gas flow passage; In a state where the cylinder axis is aligned with the axial direction of the gas plug body, and all of the gas flowing through the gas flow passage flows in from the upstream gas inflow portion and out of the downstream gas outflow portion. Prepared,
Corresponding to the movement between the closed position and the open position of the slide valve in a state along the outer peripheral surface of the cylindrical member, at least one of the upstream gas inflow portion and the downstream gas outflow portion A gas stopper comprising a sliding member that can be switched between a closed state and an open state. The cylindrical member includes the upstream gas inflow portion on the upstream end surface thereof, and the downstream gas outflow portion on the outer peripheral surface thereof.
2. The gas according to claim 1, wherein the sliding member switches between a closed state in which the downstream gas outflow portion is closed and an open state in which the downstream gas outflow portion is opened in response to movement between the closed position and the open position of the slide valve. plug. Inside the cylindrical member, an overflow prevention valve for preventing excessive outflow of gas, and a reset member for performing a reset operation for resetting the overflow prevention valve in an activated state to an inoperative state are provided.
The sliding member is provided with a stepped portion that forms a step in a cylinder radial direction of the cylindrical member at a portion facing the downstream gas outflow portion in a closed state in which the downstream gas outflow portion is closed,
3. The gas plug according to claim 2, wherein the reset operation is performed with the reset member abutting against the stepped portion in accordance with switching between the closed state and the open state of the downstream gas outflow portion of the sliding member. .   The gas stopper according to any one of claims 1 to 3, wherein the sliding member has a clamp shape in which an inner peripheral surface sandwiches an outer peripheral surface of the cylindrical member.

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