JP2524873Y2 - Gas container container valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a container valve of a gas container, and more particularly to a container valve that is optimally used for supplying oxygen safely to a container valve of an oxygen gas container.

[Conventional technology]

For example, the oxygen gas supply device 1 shown in FIG.
The oxygen gas containers 2 are collectively piped, and each oxygen gas container 2 is usually filled with oxygen gas at a pressure of 120 to 150 kg / cm ^2. It is taken out from the attached container valve 3.

As shown in FIG. 5, the container valve 3 has a valve body 3a.
The valve chamber 3b is formed therein, and a valve 3d for opening and closing a valve seat 3c is provided in the valve chamber 3b so as to be movable up and down, and the primary gas opening into the oxygen gas container 2 with the valve chamber 3b interposed therebetween. A passage 3e and a secondary gas passage 3f opening outside the oxygen gas container 2;
The primary side gas passage 3e and the secondary side gas passage 3f are communicated / cut off by screwing up and moving the valve 3d up and down. The open end side of the secondary gas passage 3f is enlarged in diameter to form an enlarged diameter portion 3h, and a screw portion 3i is formed on the outer periphery of the enlarged diameter portion 3h. Reference numeral 3j denotes a safety valve that opens when the internal pressure of the oxygen gas container 2 becomes abnormally high.

A flexible connection pipe 4 is connected to the screw portion 3i, and when the valve seat 3c of the container valve 3 is opened, the oxygen gas in the oxygen gas container 2 is changed as shown in FIG. Flows from the connecting pipe 4 to the gas outlet main pipe 7 via the main valve 5 and the check valve 6,
After the pressure is reduced to a predetermined pressure by a pressure reducing valve 8 provided in the gas outlet main pipe 7, the gas is supplied to use destinations through supply valves 9, 10, 11. Reference numeral 7a denotes a pressure gauge provided on the gas outlet main pipe 7.

Then, the oxygen gas in the oxygen gas container 2 is consumed to become an empty container, and another oxygen gas container 2 filled with oxygen gas is used.
In the case of replacing the container, first, the main valve 5 is closed, and the connection pipe 4 is removed from the screw portion 3i of the container valve 3 of the empty container. Next, this connecting pipe 4 is connected to the threaded portion 3i of the container valve 3 of the new oxygen gas container 2.
After opening the valve seat 3c of the container valve 3 to pressurize the inside of the connecting pipe 4 and apply a leak detecting liquid such as soapy water to the connecting portion to confirm that there is no leakage, Open.

[Problems to be solved by the invention]

However, after the replacement of the oxygen gas container 2, the container valve 3
If the opening of the pipe is sudden or if the volume of the connecting pipe 4 is small,
The pressure in the connecting pipe 4 rises rapidly, causing adiabatic compression, which may cause the Teflon packing used as a seal for the valve seat of the main valve 5 to burn.

In order to avoid this, means for increasing the inner diameter of the connecting pipe 4 or lengthening the connecting pipe 4 to increase the internal volume of the connecting pipe 4 and alleviating the rise in pressure to reduce the degree of adiabatic compression are provided. There are cases, however, where implementation is difficult due to space requirements. There is also a means for slowly opening the container valve 3 to suppress the occurrence of adiabatic compression. However, in this case, skill is required, the number of operators is limited, and it is not possible to confirm whether or not the Teflon packing is burning. Is inevitable.

Therefore, an object of the present invention is to provide a safe container valve that does not have to worry about burning of Teflon packing due to adiabatic compression even when the container valve is suddenly opened.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a primary gas passage opening in a gas container and a secondary gas passage opening outside a gas container, with a valve chamber having a valve element for opening and closing a valve seat interposed therebetween. In the container valve of the gas container having, near the valve chamber in the secondary gas passage, a flow control plate having a communication hole in the center and around the center is disposed so as to be movable in the axial direction of the secondary gas passage,
A short pipe is mounted on the inner wall of the secondary gas passage concentrically with the secondary gas passage near the non-valve chamber of the flow control plate, and the flow control is provided between the short pipe and the flow control plate. An elastic member for urging the plate in a valve chamber direction away from the valve chamber side end wall of the short pipe is contracted, and when the valve is opened, the flow control plate is set to the elastic member by the internal pressure of the gas filled in the gas container. When the secondary gas passage is pushed in the direction opposite to the valve chamber against the urging force of the secondary gas passage, the peripheral communication hole abuts on the valve chamber side end wall of the short pipe and is closed and the primary side is closed. The gas passage and the secondary gas passage are configured to communicate with each other through a valve chamber, a central communication hole, and a short pipe.

[Action]

With this configuration, even if the container valve is suddenly opened with the main valve closed, at the beginning of the opening of the container valve, the flow rate control plate is in the gas container introduced from the primary gas passage through the valve chamber. Against the urging force of the elastic member to abut against the valve chamber side end wall of the short pipe, and only the communication hole at the center of the flow control plate communicates with the pipe of the short pipe to control the flow rate. Since the communication hole in the center of the plate and the conduit of the short pipe form a part of the secondary gas passage, the gas in the gas container is depressurized and flows while passing through the communication hole in the center of the flow control plate. Supplied limited. Then, as the pressure on the side connected to the secondary side of the container valve rises, the flow control plate is pushed by the elastic member and separates from the valve chamber side end wall of the short pipe, and the periphery of the flow control plate is The gas in the gas container flows out of the communication hole and is supplied without flow rate limitation.

In addition, when filling an empty gas container with gas, the gas is supplied from the open end side of the secondary gas passage of the container valve.In this case, the flow control plate is actuated by the urging force of the elastic member. Since it is separated from the valve chamber side end wall of the short pipe, the communication hole at the center of the flow control plate and the communication hole at the periphery communicate with the pipe of the short pipe, and the communication hole at the center of the flow control plate and the surrounding Since the communication hole and the short pipe form a part of the secondary gas passage, the gas is filled into the gas container through the valve chamber and the primary gas passage without any flow rate restriction.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIGS. 1 to 3 show a first embodiment of the present invention. The basic structure of a container valve 3 is the same as that of a conventional container valve shown in FIG. Chamber 3b, the valve chamber 3b
A valve 3d for opening and closing a valve seat 3c in the inside, a primary gas passage 3e opening into the oxygen gas container 2 formed with the valve chamber 3b interposed therebetween, and a secondary gas passage 3f opening outside the oxygen gas container 2. , Valve 3d
Equipped with an operator 3g for moving up and down and a safety valve 3j,
An enlarged diameter portion 3h is formed on the open end side of the secondary gas passage 3f, and a screw portion 3i to which the connecting pipe 4 is connected is formed on the outer periphery of the enlarged diameter portion 3h.

The container valve 3 is further provided with an enlarged diameter portion of the secondary gas passage 3f.
Near the valve chamber in 3h, the flow control plate 20 is disposed so as to be movable in the axial direction of the secondary gas passage 3f, and near the valve control chamber of the flow control plate 20, a short pipe 21 is connected to the secondary gas passage. Attached to the inner wall of the secondary gas passage 3f concentrically with 3f, between the short pipe 21 and the flow control plate 20, the flow control plate 20 is moved from the valve chamber side end wall 21e of the short pipe 21. A coil spring 22, which is an elastic member that urges in the direction of the separated valve chamber, is contracted.

That is, the short tube 21 is an outer tube portion having a thread portion formed on the outer periphery.
21a, an inner pipe portion 21c having a pipe 21b formed on the inner periphery thereof, a groove portion 21d is provided between the two pipe portions 21a and 21c, and the two valve portions 21a and 21c are connected to each other on the opposite side of the valve chamber. The inner tube portion 21c is formed shorter than the outer tube portion 21a, and a copper packing 23 is sandwiched between the outer tube portion 21a and a deeper step portion of the enlarged diameter portion 3h to be screwed to the enlarged diameter portion 3h. Being
It is mounted on the inner wall of the secondary gas passage 3f concentrically with the secondary gas passage 3f.

The flow control plate 20 is formed to have a slightly smaller diameter than the inner diameter of the outer tube portion 21a of the short tube 21, and is formed of copper on the inner peripheral side of the outer tube portion 21a and the valve chamber side end wall 21e of the inner tube portion 20c. It is arranged between the packing 23.

As shown in FIGS. 2 and 3, the flow control plate 20 has a conical projection formed on the surface opposite to the valve chamber to have a diameter slightly larger than the inner diameter of the conduit 21b of the short pipe 21. Surface 20a, and one communication hole 20b is formed in the center of the conical projection surface 20a in the axial direction of the secondary gas passage 3f.
Outside the conical projection surface 20a around b, a central communication hole
Four communication holes 20c slightly larger in diameter than 20b are used as secondary gas passages.
Drilled in the axial direction of 3f.

The central communication hole 20b is formed to have a smaller cross-sectional area than the cross-sectional area of the conduit 21b of the short pipe 21, which is the minimum cross-sectional area of the secondary gas passage 3b. Also, the central communication hole 20b
When two or more are provided, the total cross-sectional area is formed smaller than the cross-sectional area of the conduit 21b of the short pipe 21. Further, the number of the peripheral communication holes 20c is not limited to four, but the total cross-sectional area of the short-circuit pipe 21 is the minimum cross-sectional area of the secondary gas passage 3b.
It is desirable that the cross-sectional area be larger than 21b.

The coil spring 22 is disposed in the groove 21d of the short pipe 21 and urges the flow control plate 20 in the valve chamber direction so as to be separated from the valve chamber side end wall 21e of the short pipe 21. When the flow control plate 20 is pushed in the direction opposite to the valve chamber of the secondary gas passage 3f by the internal pressure of the gas filled in the oxygen gas container 2 when the valve is opened, the peripheral communication hole 20c is closed by the short pipe 21. Is set so as to be able to contact the valve chamber side end wall 21e.

When the flow control plate 20 is pushed in the direction opposite to the valve chamber of the secondary gas passage 3f against the urging force of the coil spring 22 by the internal pressure of the gas filled in the gas container 2, the surrounding communication holes 20c is closed by contacting the valve chamber side end wall 21e of the short pipe 21, and the primary gas passage 3e and the secondary gas passage 3f are connected to the valve chamber 3b, the central communication hole 20c, and the pipe 21b of the short pipe 20. Is communicated through.

The operation of the container valve 3 configured as described above will be described.
When the container valve 3 is initially opened, the gas pressure on the valve chamber 3b side of the secondary gas passage 3f is higher than the open end side on the opposite side of the valve chamber, so that as shown in FIG. 1 and FIG. The internal pressure of the gas overcomes the urging force of the coil spring 22 and pushes the flow control plate 20 in the direction opposite to the valve chamber of the secondary gas passage 3f, so that the conical projection surface 20a of the flow control plate 20 It comes into contact with the valve chamber side end wall 21e in a line contact state.

As a result, the communication hole 20c around the flow control plate 20 is
1 is closed by the valve chamber side end wall 21e, only the center communication hole 20b communicates with the pipe 21b of the short pipe 21, and the center communication hole 20b of the flow control plate 20 and the pipe 21c of the short pipe 21 are connected. A part of the secondary gas passage 3f is formed.

Therefore, the oxygen gas in the oxygen gas container 2 is introduced into the secondary gas passage 3f through the primary gas passage 3e and the valve chamber 3b which open into the oxygen gas container 2, where the central communication hole 21
b, the pressure is reduced and the flow rate is restricted, and is supplied into the connecting pipe 4 from the open end side of the secondary gas passage 3f that opens to the outside of the oxygen gas container 2 through the pipe 21b of the short pipe 21 and is insulated. Compression is suppressed.

At this time, the flow control plate 20 has
Since it comes into contact with the first valve chamber side end wall 21e in a line contact state, it operates smoothly without vibration or the like.

When the pressure in the connecting pipe 4 rises after a while, the pressure difference generated before and after the flow control plate 20 decreases, and the flow control plate 20 is moved in the valve chamber direction by the urging force of the coil spring 22. It moves and separates from the valve chamber side end wall 21 e of the short pipe 21, whereby oxygen gas is also led out to the pipe 21 b of the short pipe 21 from the communication hole 20 c around the flow control plate 20, and And the oxygen gas in the oxygen gas container 2 is supplied without being limited in flow rate.

When oxygen gas is charged into the oxygen gas container 2 from the open end side of the secondary gas passage 3 f of the container valve 3, the flow control plate 20 is moved by the urging force of the coil spring 22 toward the valve chamber of the short pipe 21. Since it is always separated from the end wall 21e and is pushed toward the valve chamber by the pressure of the gas to be charged, the communication hole 20b at the center of the flow control plate 20 and the communication hole 20c at the periphery and the conduit 21b of the short pipe 21 are formed. Forms a part of the secondary gas passage 3f, and the charged oxygen gas flows from the open end side of the secondary gas passage 3f through the conduit 21b of the short pipe 21 to the central communication hole 20b and the peripheral communication hole. After passing through 20c, the oxygen gas container 2 is quickly filled through the valve chamber 3b and the primary gas passage 3e without any flow rate restriction.

In the above embodiment, the short pipe 21 is fixedly attached to the enlarged diameter portion 3h of the secondary gas passage 3f by screwing, but the short pipe 21 is fitted to the secondary gas passage 3b by fitting or cooling. It can also be fixedly mounted. Also, a spring, rubber, or the like can be used as the elastic member.

Further, the shape of the flow control plate or the short pipe may be other than the above-described embodiment. For example, as shown in FIG. 4, the secondary gas passage 3f has a secondary gas passage near the valve chamber in the enlarged diameter portion 3h. Side gas passage 3f
Central communication hole 20b which is arranged to be movable in the axial direction of
And a flow control plate 20 having a communication hole 20c around it and a flat plate shape, and mounted on the inner wall of the secondary gas passage 3f concentrically with the secondary gas passage 3f near the non-valve chamber of the flow control plate 20 An annular concave portion 21f is formed on the outer peripheral side of the valve chamber side end wall 21e of the short pipe 21 to be formed, and the flow control plate 20 is provided between the annular concave portion 21f of the short pipe 21 and the flow control plate 20. A coil spring 22 for urging in the direction of the valve chamber away from the valve chamber side end wall 21e is contracted, and when the valve is opened, the flow control plate 20 is opened by the internal pressure of the gas charged in the oxygen gas container 2 to the secondary gas passage. When pressed in the direction opposite to the valve chamber 3f, the peripheral communication hole 20c can be closed by the valve chamber side end wall 21e by bringing the peripheral communication hole 20c into contact with the valve chamber side end wall 21e of the short pipe 21. You may do so.

In each of the above embodiments, the present invention has been described using the container valve of the oxygen gas container. However, the present invention can be applied to other gas containers.

[Effect of the invention]

As described above, the present invention has a primary gas passage that opens into a gas container and a secondary gas passage that opens outside the gas container with a valve chamber provided with a valve that opens and closes a valve seat interposed therebetween. In the container valve of the gas container, a flow control plate having a communication hole in the center and the periphery thereof is disposed near the valve chamber in the secondary gas passage so as to be movable in the axial direction of the secondary gas passage. A short pipe is mounted on the inner wall of the secondary gas passage concentrically with the secondary gas passage near the control valve opposite the valve chamber, and the flow control plate is connected between the short pipe and the flow control plate. An elastic member for urging in the direction of the valve chamber away from the valve chamber side end wall is contracted, and when the valve is opened, the flow control plate is opposed to the urging force of the elastic member by the internal pressure of the gas filled in the gas container. When the secondary gas passage is pushed in the direction opposite to the valve chamber, the peripheral communication hole abuts against the end wall of the valve chamber of the short pipe and is closed and the primary side is closed. The gas passage and the secondary gas passage are configured to communicate with each other through the valve chamber, the central communication hole, and the short pipe. Therefore, at the beginning of the opening of the container valve, the flow control plate is controlled by the gas pressure in the gas container. Is in contact with the short pipe, the surrounding communication hole is closed, and only the center communication hole of the flow control plate communicates with the short pipe line, and the center communication hole of the flow control plate and the short pipe line Forms a part of the secondary gas passage, the gas in the gas container is reduced in pressure and the flow rate is restricted while passing through the central communication hole, and is supplied to the use destination from the secondary gas passage. When the present invention is used for an oxygen gas container, the generation of compression and heat insulation in the connecting pipe connected to the secondary gas passage is suppressed, so that the Teflon packing of the main valve can be prevented from burning.

Also, by deriving the gas from the gas container thereafter,
As the pressure on the side connected to the secondary gas passage of the container valve rises, the flow control plate is pushed by the urging force of the elastic member and separates from the valve chamber side end wall of the short pipe, and the flow control plate The gas in the container also flows out of the peripheral communication hole and is supplied to the use destination without any flow rate restriction.

Further, when the gas is introduced from the secondary gas passage of the container valve to fill the gas container with the gas, the flow control plate is separated from the valve chamber side end wall of the short pipe by the urging force of the elastic member, and the flow control plate is The gas is quickly filled into the gas container without any flow restriction because the central and peripheral communication holes and the short pipe form a part of the secondary gas passage.

Therefore, when used as a container valve of an oxygen gas container used in an oxygen gas supply facility, even if a person without special skill is operated to open the valve, adiabatic compression does not occur, and the existing gas supply facility is not used. Since no change is required, the utility is high.

Further, as a container valve of another gas container, it can be used for any gas container that causes inconvenience when the container valve is suddenly opened, and has a wide application range.

[Brief description of the drawings]

1 to 3 show a first embodiment of the present invention.
1 is a sectional view of a container valve, FIG. 2 is an enlarged sectional view of a secondary gas passage of the container valve of FIG. 1, FIG. 3 is a front view of the same flow control plate, and FIG. FIG. 5 is an enlarged sectional view of a secondary gas passage of a container valve showing an example, FIG. 5 is a sectional view of a conventional container valve,
FIG. 6 is a system diagram of the oxygen gas supply device. 2 ... oxygen gas container, 3 ... container valve, 3a ... valve body, 3b
… Valve room, 3c… Valve seat, 3d… Valve, 3e… Primary gas passage, 3f …… Secondary gas passage, 3g… Operator, 3h… Diameter, 20… Flow control plate, 20b ... Central communication hole, 20c ...
... Peripheral communication hole, 21 ... Short pipe, 21b ... Pipe line, 21e ... Valve chamber side end wall, 22 ... Coil spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A gas container having a primary gas passage opening into a gas container and a secondary gas passage opening outside the gas container with a valve chamber provided with a valve element for opening and closing a valve seat interposed therebetween. In the container valve, a flow control plate having a communication hole in the center and the periphery thereof is disposed near the valve chamber in the secondary gas passage so as to be movable in the axial direction of the secondary gas passage. A short pipe is mounted on the inner wall of the secondary gas passage concentrically with the secondary gas passage, and the flow control plate is disposed between the short pipe and the flow control plate. An elastic member for urging in the direction of the valve chamber away from the valve chamber side end wall of the pipe is contracted, and when the valve is opened, the flow control plate reduces the urging force of the elastic member by the internal pressure of the gas filled in the gas container. When the secondary gas passage is pushed in the opposite direction to the valve chamber, the peripheral communication hole abuts on the valve chamber side end wall of the short pipe. While it is busy primary gas passage and the secondary-side gas passage and the valve chamber, a central communicating hole, the container valve of the gas container, characterized by being configured as communicated via a short pipe.