JP2008095852A - Gas discharge preventing device for liquid-phase/gas-phase gas hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas discharge preventing device for a gas hose, usable in both liquid and gas phases. <P>SOLUTION: The gas discharge preventing device comprises a hollow cylindrical connector 9 connected to a liquefied gas supply source, a hollow cylindrical hose joint 11 inserted into a cylinder hole of the connector, a first valve element 32 provided at the front end of the hose joint whose cylinder hole is closed, a ring member 41 for holding the hose joint at its small diameter portion slidably in the axial direction, restricting means 28, 32, 41 for the hose joint at its insertion forward end and its pull-out backward end, a first communication hole 35 for connecting the cylinder hole of the hose joint with the cylinder hole of the connector near the first valve element of the hose joint, a second communication hole 36 formed in the first valve element, and a second valve element 37 supported via a spring member 39 which resiliently energizes the second communication hole to be closed toward the first valve element. When tension above a certain level operates on the gas hose, the first valve element is closed to stop the supply of gas. When pressure in the gas hose is a set value or greater, the second valve element is opened to return liquefied gas in the gas hose to the side of a gas container, thus suppressing pressure rise in the gas hose. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas hose gas discharge preventer that can be used for both liquid phase and gas phase.

  Liquefied gases such as LNG (liquefied natural gas) or LPG (liquefied petroleum gas) are used in a wide variety of applications from general households to commercial use and industrial use. The liquid phase filled in gas containers such as gas cylinders The liquefied gas is generally vaporized and used in the gas phase.

  In addition, when supplying gas from the gas container to the user through the gas hose, in order to prevent the gas hose from being released if the gas hose is damaged due to a certain level of tension applied to the gas hose for some reason, such as overturning the gas container. In addition, there is known a tension-type gas discharge preventer that shuts off the gas supply by the tension applied to the gas hose.

  As such a gas emission preventer, what is described in patent document 1 is known conventionally. According to this, the gas discharge preventer includes a hollow cylindrical connector connected to the liquefied gas supply port of the liquefied gas supply source, and a hollow cylindrical hose having a base portion inserted into the cylindrical hole of the connector. The joint, the holding portion that is formed integrally with the coupling and formed at the base of the hose coupling so as to be slidable in the axial direction, the large-diameter portion of the base of the hose coupling, and the coupling cooperate with each other. Thus, there is provided a restricting means for restricting the positions of the insertion advance end and the withdrawal retreat end. A hose joint tube hole is closed at the tip of the base of the hose joint to form a valve body, and a through hole communicating with the tube hole of the connector in the radial direction of the small diameter portion of the hose joint near the valve body is formed. It is formed by drilling.

  Since it is configured in this way, when the hose joint is pushed into the tube hole of the connector and stopped at the position of the insertion advance end, the valve body reaches the position removed from the holding portion, and through the through hole. The tube hole of the hose joint communicates with the tube hole of the connector, and gas is supplied from the gas container to the gas hose.

  On the other hand, when a certain level of tension is applied to the gas hose, when the hose joint slides in the direction of being pulled out from the connector and reaches the withdrawal retracted end, the valve element formed at the tip of the base of the hose joint is positioned in the holding part. To do. As a result, the communication between the small-diameter portion through hole of the hose joint and the tube hole of the connector is blocked, and the release of gas is automatically prevented.

Patent No. 3050508

  However, in the case of the gas release preventer having the structure described in Patent Document 1, no consideration is given to a gas hose that supplies a liquid-phase liquefied gas.

  That is, when the gas hose described in Patent Document 1 is used for a gas hose that supplies a liquid-phase liquefied gas, if a tension is applied for some reason, the valve body is closed and the supply of the liquid-phase liquefied gas is stopped. At this time, if the liquid phase liquefied gas is not used at the use destination, the liquid phase liquefied gas is sealed in the gas hose. In this state, if the liquefied gas in the liquid phase in the gas hose evaporates due to the temperature rise, the pressure in the gas hose may increase and the gas hose may be damaged.

  It is an object of the present invention to provide a gas release preventer for a gas hose that can be used for both liquid phase and gas phase.

  In order to solve the above problems, a gas discharge preventer for a liquid-phase / gas-phase gas hose of the present invention is inserted into a hollow cylindrical connector connected to a liquefied gas supply source, and a cylindrical hole of the connector. A hollow cylindrical hose joint having a base portion, a first valve body provided by closing a tube hole of the hose joint at the tip of the base portion of the hose joint, and a small diameter formed at the base portion of the hose joint A holding member for holding the portion slidably in the axial direction on the coupling tool, a regulating means for regulating the positions of the insertion advance end and the withdrawal withdrawal end of the hose joint inserted in the coupling tool, and a first valve A first through hole formed by communicating a tube hole of the hose joint and a tube hole of the connector on the tube wall of the small diameter portion of the hose joint in the vicinity of the body, and in the axial direction of the first valve body The second through hole formed and the second valve supported by the first valve body so as to be close to and away from the second through hole in the axial direction. And a spring member that urges the second valve body toward the first valve body.

  With this configuration, when a certain level of tension is applied to the gas hose, the hose joint to which the gas hose is connected moves in the axial direction in the tube hole of the connector, reaches the withdrawal retreat end, and stops. . At this time, the first valve body and the holding member are in contact with each other, and the first through hole is positioned on the sliding inner surface of the holding member. As a result, the communication between the first through hole and the cylinder hole of the connector is blocked, the gas flow path between the tube hole of the hose joint and the cylinder hole of the connector is blocked, and the gas phase and liquid phase gas are supplied. Is stopped.

  On the other hand, if the liquid liquefied gas in the gas hose evaporates and the pressure rises with the first valve body closed, the pressure causes the second valve body to move away from the first valve body. receive. When the acting force exceeds the tension of the spring member that elastically biases the second valve body, that is, when the acting force exceeds the set value, the second valve body is separated from the first valve body, The 2nd through-hole provided in the valve body is opened. Thereby, the liquid phase or gaseous phase liquefied gas in a gas hose is returned to a liquefied gas container, and the pressure rise in a gas hose can be suppressed.

  Therefore, according to the gas discharge prevention device of the gas hose of the present invention, it can be used for both liquid phase and gas phase.

  In the above case, the holding member can be formed by a ring member that is fixed to the inner surface of the cylindrical hole of the connector and holds the small diameter portion of the hose joint so as to be slidable in the axial direction. The regulating means regulates the position of the insertion advance end when the large-diameter portion of the base portion of the hose joint abuts on the ring member, and determines the position of the drawer retreat end when the first valve body abuts on the ring member. It can be regulated. Further, the first valve body is provided by fixing a member having a larger diameter than the small diameter portion of the hose joint to the tip of the small diameter portion of the hose joint, and the end face of the ring-shaped member facing the member is used as a valve seat. be able to. In this case, a packing can be attached to the valve seat of the ring member facing the first valve body, and a packing can be attached to the opposing surface where the first valve body and the second valve body come into contact with and separate from each other.

  Further, the holding member can be formed by a reduced diameter portion formed by reducing the inner diameter of the connector in accordance with the small diameter portion of the base portion of the hose joint. The restricting means restricts the position of the insertion advance end by the large diameter portion of the base portion of the hose joint coming into contact with the end portion of the reduced diameter portion, and the protrusion formed on the large diameter portion of the base portion of the hose joint is connected. The position of the drawer retreat end can be regulated by contacting the protrusion formed on the inner surface of the cylindrical hole of the tool. Furthermore, the first valve body is formed of a member having a diameter that can be inserted into the reduced diameter portion of the connector, and is formed so that the first valve body is inserted into the reduced diameter portion at the position of the withdrawal retracted end. Can do.

  In addition, the hose joint is firmly pressed at the insertion advance end position of the hose joint by pressing it against the inner peripheral surface of the coupler with a ring-shaped packing attached to the large-diameter portion of the base. And the relative position with respect to the coupler can be held.

  ADVANTAGE OF THE INVENTION According to this invention, the gas discharge | release prevention device of the gas hose which can be used for both a liquid phase and a gaseous phase can be provided.

Hereinafter, modes for carrying out the present invention will be described.
(Embodiment 1)
FIG. 1 is a cross-sectional view of a gas release preventer of a liquid phase / gas phase gas hose according to an embodiment. FIG. 2 shows a state when the tension is activated. FIG. 3 shows a state where the liquid seal is released in a state where the tension is activated. FIG. 4 shows a use state of the gas emission preventer 1 for liquid phase / gas phase gas hose.

  As shown in FIG. 4, the gas discharge preventer 1 for the liquid-phase / gas-phase gas hose of the present embodiment is connected to a liquefied gas supply port 5 of the liquefied gas container 3, for example, and connected to a hose joint 11. It is used when a gas hose 7 is connected and gas is supplied to the user. Even in the case of the vertical liquefied gas container 3 as shown in the figure, the liquid phase liquefied gas may be supplied through a siphon tube or the like. Moreover, although the vertical type liquefied gas container 3 was illustrated in FIG. 4, this invention is applicable also when supplying a liquid phase liquefied gas from a horizontal type | mold or a vertical type bulk storage tank etc. via a gas hose.

  As shown in FIG. 1, the gas emission preventer 1 of this embodiment is inserted into a hollow cylindrical connector 9 connected to a liquefied gas supply port of a liquefied gas supply source, and a cylindrical hole of the connector 9. A hollow cylindrical hose joint 11 having a base is formed. The liquefied gas supply port is provided in a liquefied gas container which is a liquefied gas supply source (not shown) or a pipe connected to the liquefied gas container.

  The connector 9 includes a large-diameter connecting portion 16 that is pressed against a liquefied gas supply port (not shown) via the packing 15, a cylindrical portion 17 that is smaller in diameter than the connecting portion 16, and the connecting portion 16 and the cylindrical portion 17. It is formed with a cylindrical hole 18 drilled through. In addition, the screwing member 19 is freely fitted on the outer periphery of the cylindrical portion 17 and the screw 20 of the screwing member 19 is screwed into a screw hole of a liquefied gas supply port (not shown), whereby the connecting portion 16 is liquefied gas. It can be firmly connected to the supply port. Reference numeral 21 denotes a nut portion for turning the screwing member 19.

  The hose joint 11 has a joint portion 25 to which the gas hose 7 is attached and a base portion 26 to be inserted into the tubular hole 18 of the connector 9, and is bored through a tubular hole 27 that serves as a flow path for liquefied gas. Yes. The base portion 26 of the hose joint 11 is formed to have a large-diameter portion 28 having an outer diameter that is closely inserted into the cylindrical hole 18 and a small-diameter portion 29 having a smaller diameter than the large-diameter portion 28. A ring groove 30 is formed on the outer peripheral surface of the large diameter portion 28, and an O-ring packing 31 is attached to the ring groove 30.

  Moreover, the 1st valve body 32 formed in the cup shape is mounted | worn with the front-end | tip of the hose coupling 11, and the cylinder hole 27 is obstruct | occluded by this. A screw 33 is formed on the inner peripheral surface of the cup of the first valve body 32, and the first valve body 32 is screwed into a screw 34 formed on the outer periphery of the tip of the hose joint 11, thereby connecting the first valve body 32 to the hose joint 11. Attached to the tip of A plurality (two in the illustrated example) of through-holes 35 are formed in the cylindrical wall of the small-diameter portion 29 on the right side in the drawing with respect to the position of the first valve body 32, thereby forming the cylindrical hole 28 and the cylindrical hole. 27 is configured to be able to communicate.

  Further, a through hole 36 is formed in the flat portion of the first valve body 32. A disc-shaped second valve body 37 having a diameter larger than that of the through hole 36 is provided so as to be able to contact and separate from the flat plate portion of the first valve body 32. The second valve body 37 is elastically biased in a direction in which the second valve body 37 is pressed against the first valve body 32 by a spring member 39 supported by the first valve body 32 by a support member 38. An O-ring packing 40 is mounted in the ring groove on the surface where the second valve body 37 faces the first valve body 32.

  The hose joint 11 formed in this way is inserted into a cylindrical ring member 41 having a small-diameter portion 29 attached to the inner peripheral surface of the tubular hole 18 of the connector 9, and is supported to be freely slidable in the axial direction. ing. A protrusion 42 having a wedge-shaped cross section is formed on the outer periphery of one end of the ring member 41, and the protrusion 42 is engaged with a ring groove 43 formed on the inner peripheral surface of the tubular hole 18 of the connector 9. The ring member 41 is fixed to the connector 9. In addition, ring grooves 44 are formed at a plurality of axial positions on the outer peripheral surface of the ring member 41, and O-ring packing 45 is attached to the ring grooves 44. Further, a ring groove 46 is formed on the end face of the ring member 41 facing the first valve body 32, and an O-ring packing 47 is attached to the ring groove 46.

  Further, the insertion advance end of the hose joint 11 inserted into the connector 9 is regulated by the large diameter portion 28 of the hose joint 11 coming into contact with one end of the ring member 41. In addition, the drawer retreat end of the hose joint 11 is regulated by the first valve body 32 coming into contact with the other end of the ring member 41.

  The gas discharge preventer 1 is assembled by inserting and fixing the ring member 41 to the connector 9 and then inserting the small diameter portion 29 of the hose joint 11 into the ring member 41 with the first valve body 32 removed. After that, the first valve body 32 is attached to the tip of the small diameter portion 29. Alternatively, after attaching the ring member 41 to the small diameter portion 29 of the hose joint 11 with the first valve body 32 removed, and attaching the first valve body 32 to the tip of the small diameter portion 29, The protruding shape of the ring member 41 can be inserted into the cylindrical hole 18 of the connector 9 so as to be locked in the ring groove 43 and fixed.

Operation | movement of the gas emission preventer 1 of this embodiment comprised in this way is demonstrated.
As shown in FIG. 4, the gas release preventer 1 is connected to the liquefied gas supply port of the liquefied gas container 3 by a screwing member 19, and the gas hose 7 is attached to the hose joint 11. Usually, as shown in FIG. 1, the hose joint 11 is pushed into the insertion advance end position. As a result, the first through hole 38 of the hose joint 11 is communicated with the cylindrical hole 18 of the connector 9, and liquid or vapor phase liquefied gas is supplied from the liquefied gas container 3 to the gas hose 7. At this time, the cylindrical hole 18 of the connector 9 is sealed from the atmosphere by the O-ring packings 31 and 45.

  Here, when the liquefied gas container 3 falls down due to some cause such as an earthquake and a tension larger than the normal tension acts on the gas hose 7, the hose joint 11 is pulled in the direction of being pulled out from the connector 9. As a result, as shown in FIG. 2, the hose joint 11 is pulled rightward in the drawing, the first valve body 32 comes into contact with the O-ring packing 47 mounted on the end surface of the ring member 41, and the retracted retracted end is Be regulated. As a result, the communication between the first through hole 35 and the cylindrical hole 18 is blocked by the first valve body 32, and the supply of the liquid phase or vapor phase liquefied gas from the liquefied gas container 3 to the gas hose 7 is blocked. Thereby, even if the gas hose 7 is damaged, it is possible to prevent the liquid-phase or gas-phase liquefied gas from being released into the atmosphere.

  In this way, after the communication between the first through hole 35 and the cylindrical hole 18 is blocked by the first valve body 32, if the gas hose is not damaged or no gas is used, for example, the liquid phase The liquefied gas may be sealed in the gas hose 7. In this case, when the temperature in the gas hose 7 rises due to the outside air temperature or the like and the liquid phase liquefied gas evaporates, the pressure in the gas hose 7 rises and the gas hose 7 may be damaged. In this regard, according to the present embodiment, when the pressure in the gas hose 7 rises, the second valve body 37 resists the tension of the spring member 39 biased toward the first valve body 32, and FIG. 2, the second valve body 37 is separated from the first valve body 32, and the second through hole 36 provided in the first valve body 32 is opened. As a result, the liquid phase or gas phase liquefied gas in the gas hose 7 is returned to the liquefied gas container through the second through hole 36, so that the gas hose 7 can be prevented from being damaged.

As described above, according to the present embodiment, when a tension higher than normal is applied to the gas hose 7, the first valve body 32 is closed to prevent the liquid phase or gas phase liquefied gas from being released, while the gas hose 7 When the liquid phase liquefied gas is sealed and the pressure in the gas hose 7 rises, the second valve element 37 is opened, and the liquid phase or gas phase liquefied gas in the gas hose 7 is returned to the liquefied gas container side. Therefore, it is possible to prevent the gas hose 7 from being damaged and the like, and it is possible to cope with both the liquid phase and the gas phase with a single gas emission preventer.
(Embodiment 2)
FIG. 5 shows a configuration of a gas emission preventer according to another embodiment to which the present invention is applied. The present embodiment is an embodiment in which the present invention is applied to a gas emission preventer having a configuration of Patent Document 1.
As shown in FIG. 5, the connector 111 of the tension type gas release preventing device of the present embodiment is formed in a hollow cylindrical shape, and a gas introduction port 112 communicating with a gas supply source is formed at the distal end portion 113. The cylindrical hole of the connector 111 has a reduced diameter portion 115 formed as a holding portion in the cylindrical portion 114 and an enlarged diameter portion 116 formed continuously to the reduced diameter portion 115. The gas inlet 112 communicates with the enlarged diameter portion 116. A fastener 117 is rotatably crowned on the connector 111, and a screw 118 of the fastener 117 can be screwed into a liquefied gas supply port of a liquefied gas container of a gas supply source (not shown) so as to be connected. Further, a ring-shaped groove is provided on the front end surface around the gas inlet 112, and an O-ring packing 119 made of an elastic member is mounted in the groove so as to ensure airtightness with a valve or the like connected thereto. It has become.

  The hose joint 121 is formed to have a base end portion 122 fitted into the cylindrical hole of the connector 111 and a hose joint portion 124 to which the high-pressure gas hose 7 is attached. The base end portion 122 is formed with a diameter that is slidably fitted into the reduced diameter portion 115 of the connector 111. The hose joint 121 includes a gas flow path 125 drilled from the hose joint portion 124 to the vicinity of the distal end of the base end portion 122, and a hole wall of the cylindrical portion 114 of the connector 111 that communicates with the gas flow path 125. A communication hole 126 drilled toward is provided. A first valve body 137 is integrally formed by closing the gas flow path 125 at the distal end of the base end portion 122 on the distal end side of the communication hole 126 of the hose joint 121. A ring-shaped groove 127 is formed on the outer peripheral surface of the first valve body 137, and an O-ring packing 128 made of an elastic member is attached to the groove 127. Gas is released by the transition from the reduced diameter portion 115 to the enlarged diameter portion 116 formed in this way, the communication hole 126 formed at the tip of the hose joint 121 fitted in the reduced diameter portion 115, and the O-ring packing 128. A prevention valve is formed. Further, the gas hose 7 is firmly fixed to the hose joint portion 124 by a fastening fitting 129 so as not to come off.

  The connector 111 and the hose joint 121 are slidably coupled within a single range by a cylindrical collar member 131 that constitutes a restricting means that regulates the positions of the advanced insertion end and the withdrawal retracted end of the hose joint 121. That is, the collar member 131 is formed so as to be connectable to the outer peripheral surface of the base end portion 114 of the connector 111 by a screw 132, and the hose joint 121 is connected to the stepped portion 133 formed on the inner peripheral surface of the collar member 131. A protrusion 134 formed on the outer peripheral surface is formed so as to be able to contact. Therefore, in the hose joint 121, the insertion advance end is restricted at a position where the protrusion 134 contacts the end of the base end portion 114 of the connector 111, and conversely, the protrusion 134 contacts the stepped portion 133 of the collar member 131. The drawer retreat end is regulated by the position. Here, the withdrawal retracted end merely functions as a stopper for the hose joint 121.

  Further, a ring-shaped groove 135 is provided on the outer peripheral surface of the base end portion side of the communication hole 126 of the hose joint 121, and an O-ring packing (not shown) is attached to the groove 135, whereby the reduced diameter portion of the connector 111. 115 and the sliding surface of the hose joint 121 are airtight. Similarly, a ring-shaped groove 136 is provided on the inner peripheral surface of the collar member 131, and an O-ring packing (not shown) is attached to the groove 136, thereby sliding the inner peripheral surface of the collar member 131 and the hose joint 121. Airtightness with the surface is achieved.

  Next, the structure which concerns on the characteristic part of this invention is demonstrated. A feature of this embodiment is that the first valve body 137 is formed with a through hole 138 having the same diameter as the gas flow path 125. A disc-shaped second valve body 139 having a diameter larger than that of the through hole 138 is provided so as to be opposed to and separated from the flat surface of the first valve body 137. That is, the second valve body 139 is urged in the direction in which the second valve body 139 is pressed against the first valve body 137 by the spring member 140 locked to the first valve body 137.

  Next, the operation of the gas emission preventer of this embodiment configured as described above will be described. The state of FIG. 5 shows a state where the gas emission preventing function is activated. That is, the gas hose 7 is pulled out of the connector 111 by a certain tensile force acting on the gas hose 7. In this state, since the first valve body 137 of the hose joint 121 is positioned at the reduced diameter portion 115 of the connector 111, the communication between the gas flow path 125 of the hose joint 121 and the gas inlet 112 of the connector 111 is established. Blocked. Further, the top portion of the O-ring packing 128 abuts on an inclined surface formed on the inner peripheral surface of the transition portion from the enlarged diameter portion 116 to the reduced diameter portion 115, and the withdrawal retracted end during normal operation is restricted. Thereby, the gas supply from the gas supply source communicated with the gas inlet 112 is stopped, and the release of the gas is prevented.

  During the gas discharge prevention operation, when the gas hose 7 is not damaged or when no gas is used, for example, liquid phase liquefied gas may be sealed in the gas hose 7. In this state, when the temperature in the gas hose 7 rises due to the outside air temperature or the like and the liquid phase liquefied gas evaporates, the pressure in the gas hose 7 rises and the gas hose may be damaged. In this case, according to the present embodiment, the second valve body 139 resists the tension of the spring member 140 urged toward the first valve body 137, and the second valve body 139 is the first valve body. The through-hole 138 provided in the first valve body 137 is opened away from the body 137. As a result, the liquid or vapor phase liquefied gas in the gas hose 7 is returned to the liquefied gas container through the through hole 138, so that the gas hose 7 can be prevented from being damaged.

  In a normal state, when the gas hose 7 is pushed into the connector 111, the communication hole 126 of the hose joint 121 moves to the enlarged diameter portion 116 of the connector 111, and the gas flow path 125 and the gas introduction of the hose joint 121 are introduced. The port 112 is communicated, and high-pressure gas from a gas supply source is supplied to the place of use via the gas hose 4.

  As described above, also in the present embodiment, when a tension higher than normal is applied to the gas hose 7, the first valve body 137 is closed to prevent the liquid phase or gas phase liquefied gas from being released. When the liquid phase liquefied gas is sealed and the pressure in the gas hose 7 rises, the second valve body 139 opens and returns the liquid phase or gas phase liquefied gas in the gas hose 7 to the liquefied gas container side. The gas hose 7 can be prevented from being damaged, and one gas discharge preventer can be used for both the liquid phase and the gas phase.

It is sectional drawing of the gas discharge | release prevention device for liquid phase / gas phase gas hoses of one Embodiment of this invention. It is an enlarged view of the valve part of the embodiment of FIG. 1, and is a view showing a state in which tension is applied to the gas hose and the first valve body is closed. FIG. 3 is a diagram showing a state in which the pressure in the gas hose is equal to or higher than a set value and the second valve body is opened in the state of FIG. 2. It is a figure which shows the use condition of the gas discharge | release prevention device for liquid phase / gas phase gas hoses. It is a figure which shows the structure of the gas emission preventer of other embodiment to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas discharge | emission prevention device for liquid phase / gas phase gas hoses 9 Connector 11 Hose joint 18 Cylinder hole 19 Screwing member 27 Cylinder hole 32 1st valve body 35 1st through-hole 36 2nd through-hole 37 2nd Valve body 39 Spring member 41 Ring member 28 Large diameter portion 29 Small diameter portion

Claims (5)

A hollow cylindrical connector connected to a liquefied gas supply source;
A hollow tubular hose joint having a base inserted into the tubular hole of the connector;
A first valve body provided by closing the tube hole of the hose joint at the tip of the base of the hose joint;
A holding member that holds the small-diameter portion formed in the base portion of the hose joint in the connector so as to be slidable in the axial direction;
A restricting means for restricting the positions of the insertion advance end and the withdrawal retreat end of the hose joint inserted into the connector;
A first through hole formed by communicating a tube hole of the hose joint and a tube hole of the connector on the tube wall of the small diameter portion of the hose joint near the first valve body;
A second through hole drilled in the axial direction of the first valve body;
A second valve body supported by the first valve body so as to be able to contact and separate in the axial direction with respect to the second through hole;
A gas release preventer for a liquid-phase / gas-phase gas hose comprising a spring member that biases the second valve body toward the first valve body. In claim 1,
The holding member is a ring member that is fixed to the inner surface of the cylindrical hole of the connector, and holds the small diameter portion of the hose joint so as to be slidable in the axial direction.
The restricting means restricts a position of the insertion advance end by a large diameter portion of a base portion of the hose joint being in contact with the ring member, and the pulling out by the first valve body being in contact with the ring member. It regulates the position of the backward end,
The first valve body is provided by fixing a member having a larger diameter than the small diameter portion of the hose joint to the tip of the small diameter portion of the hose joint, and the end surface of the ring member facing the member surface is a valve seat. A gas emission preventer for liquid-phase / gas-phase gas hoses. In claim 2,
Liquid phase / gas phase in which packing is mounted on the valve seat of the ring member facing the first valve body, and packing is mounted on the facing surface where the first valve body and the second valve body come into contact with and separate from each other. Gas discharge preventer for gas hose. In claim 1,
The holding member is a reduced diameter portion formed by reducing the inner diameter of the connector according to the small diameter portion of the base portion of the hose joint,
The restricting means restricts the position of the insertion advance end when the large diameter portion of the base portion of the hose joint contacts the end portion of the reduced diameter portion, and is formed in the large diameter portion of the base portion of the hose joint. The protrusion is in contact with the protrusion formed on the inner surface of the cylindrical hole of the connector, thereby regulating the position of the withdrawal retracted end,
The first valve body is formed of a member that can be inserted into the reduced diameter portion of the connector, and the first valve body is inserted into the reduced diameter portion at the position of the withdrawal retracted end. Gas release preventer for phase and gas phase gas hoses. In claim 1,
The hose coupling is pressed against the inner peripheral surface of the connector by a ring-shaped packing attached to the large diameter portion of the base portion, and is a gas discharge preventer for a liquid-phase / gas-phase gas hose.

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