JPH0645739Y2 - Valve for high pressure gas container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a valve for a high-pressure gas container.

(Prior Art) Conventionally, in a high-pressure gas container valve that is fixedly used in a high-pressure gas container, the main valve seat is opened and the gas is supplied from the high-pressure gas container while the gas overflows due to an earthquake or disaster, or When the gas container tilts, the outflow of the gas can be instantaneously and automatically shut off by operating the outflow shutoff valve, and the high-pressure gas container is used to extract the residual gas in the high-pressure gas container. A valve for a high-pressure gas container equipped with a locking member that prevents the operation of the shut-off valve when the valve is inverted so that the valve body can move forward and backward is known from Japanese Utility Model Publication No. 61-41473 and Japanese Utility Model Publication No. 62-22707. Is.

(Problems to be solved by the invention) However, in the high-pressure gas container valve as described above, when the high-pressure gas container is inverted, a mounting hole formed in the valve body for extracting residual gas. Since the locking member, which is slidably fitted while maintaining airtightness, is operated from the outside of the valve body to block the operation of the shutoff valve, the structure is complicated and handling is difficult. It is inconvenient, and because it has a mounting hole that penetrates the valve body and opens to the outside,
There is also an inconvenience that the safety is lowered as compared with the case where there is no mounting hole.

Therefore, the present inventor first developed a shut-off valve locking device (see Japanese Utility Model Laid-Open No. 60-12781) in a high-pressure gas container valve in order to solve the above problems. This shut-off valve locking device is provided with a ball guide member that allows gas to flow in the valve stem of the shut-off valve, and a ball storage space formed vertically between the ball guide member and the gas inflow passage of the valve body. Since the lock ball is housed in such a way that it cannot be escaped, there is a new problem that the structure is still complicated and the cost is high.

The present invention has been made in view of the above circumstances,
Its purpose is to make the shut-off valve inoperable without fail when the high-pressure gas container is inverted, such as when extracting residual gas, because the structure is simple and there is no failure. The present invention is intended to provide a valve for a high pressure gas container capable of

(Means for Solving the Problem) In order to achieve the above-mentioned object, a valve for a high pressure gas container according to the present invention is connected to a discharge passage of a valve body attached to the high pressure gas container through an inflow passage through a valve chamber. A shut-off valve that automatically closes the auxiliary valve seat formed upstream of the main valve seat at the upper edge of the passage with excess gas due to an earthquake, disaster, etc. is installed in the inflow passage so that it can float. In the valve for a high-pressure gas container, the gas can flow and the valve stem of the shut-off valve can be inserted in the middle of the inflow passage, and a reverse valve receiving ball for shutting-off valve can be received at the center of the lower surface. A ball receiving member for restricting movement of a shutoff valve having a funnel-shaped recess is provided, and a shutoff valve support portion capable of passing gas and inserting a stem of the shutoff valve is provided near the inlet end of the inflow passage. Attach and fix the valve stem of the shutoff valve to a ball receiving member for shutting off the shutoff valve. The valve stem is provided with a stopper member that can be moved up and down so as to move up and down, and the valve stem is provided with a locking member that locks the shutoff valve to the shutoff valve support member at the time of gas supply. The shut-off valve movement-regulating ball receiving member and the shut-off valve support member that moves into the reverse funnel-shaped recess of the movement-regulating ball receiving member and makes the shut-off valve inoperable in cooperation with the locking member. It cannot be escaped and can be rolled freely in the space between and.

(Operation) The high-pressure gas container valve according to the present invention is attached to a high-pressure gas container, filled with high-pressure gas into the container through a discharge passage and an inflow passage, and then used by connecting a gas device or the like to the discharge passage. To do.

That is, when the main valve seat is opened and gas is supplied, an appropriate amount of gas normally flows in the inflow passage, and the shutoff valve cannot be floated. When gas is generated, the shutoff valve is floated by the overflowing gas to close the auxiliary valve seat and automatically shut out the outflow of gas.

Also, when extracting the residual gas in the high-pressure gas container, if the high-pressure gas container is inverted after closing the main valve seat with the main valve body, the shut-off valve is blocked by the main valve body and is blocked. The valve movement regulating ball rolls into the reverse funnel-shaped recess of the shutoff valve movement regulating ball receiving member. Next, when the main valve seat is opened, the shut-off valve follows and descends to the main valve body, but the shut-off valve is made inoperable by the cooperation of the shut-off valve movement regulating ball and the locking member constituting the shut-off valve. Since the valve seat is not closed, residual gas can be extracted.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

In the figure, 10 is a valve main body, and this valve main body 10 has a male screw portion 11 attached to a high pressure gas container (not shown) fixedly engraved on the outside of a lower end portion thereof, and has a valve chamber 12 and a valve chamber 12 inside thereof. An emitter 13 and an inflow path 14 which are separately communicated with the side and the lower part of the chamber 12, respectively.
And a safety valve mounting port 15 opened on a side portion of the inflow passage 14 and protruding into the valve chamber 12
The main valve seat 16 is formed at the upper end of the reduced diameter edge part of the main valve seat 16
Between the safety valve mounting port 15 and the safety valve mounting port 15, a frustoconical auxiliary valve seat 17 for expanding the diameter is formed in the vicinity of the main valve seat 16, and further in the middle of the inflow passage 14 and near the inlet end. Is a female thread portion 18 of the ball receiving member 30 for restricting movement of the shutoff valve, which will be described later.
And a threaded female thread portion 19 of the shutoff valve support member 40 described later,
A female screw portion 1 for screwing a gas conduit (not shown) into the discharge passage 13
3'is engraved.

The ball receiving member 30 for restricting the movement of the shutoff valve has a male screw threaded on the female screw portion 18 engraved on the outer peripheral surface of the disc, and has a valve stem insertion hole 31 in the center portion of the disc and the periphery of the hole 31. , And each of which has a gas flow hole 32, and a reverse funnel-shaped recess 33 for receiving a shutoff valve movement regulating ball 60 described later on the lower surface of the disk.

The shutoff valve support member 40 is formed by engraving a male screw screwed into the female screw portion 19 on the outer peripheral surface of a cylindrical body with an upper end wall, and a valve stem insertion hole 41 at the center of the upper end wall and a hole of the hole 41. The gas flow holes 42, ... Are formed in the periphery.

The valve chamber 12 is equipped with a main valve body 20 that is moved up and down by operating a handle 21 to open and close the main valve seat 16, and a safety valve body 23 is provided at the safety valve mounting port 15. A safety valve 22 is attached.

A ball receiving member 30 for restricting the movement of the shutoff valve is provided on the female screw portion 18.
Is fixed by screwing, and a shutoff valve supporting member 40 is screwed and fixed to the female screw portion 19, and the distance between the two members 30 and 40 is set as described later.

Reference numeral 50 is a shutoff valve for shutting off the overflow gas that is floated by the overflow gas. The shutoff valve 50 includes the valve stem insertion hole 31 of the ball receiving member 30 for shutting off the shutoff valve and the shutoff valve support member.
The valve stem 51 inserted into the valve stem insertion hole 41 of the valve 40 and the auxiliary valve body support members 52 ₁ and 52 ₂ formed at the upper end of the valve stem 51 are sandwiched and closely contacted with the auxiliary valve seat 17. And an O-ring-shaped sub-valve body 53 that is used to shut off the overflow gas, and the sub-valve body 53
And a shut-off valve support member 40 and a differential pressure elimination projection 54 that is projected above the main valve seat 16 when the shutoff valve support member 40 is brought into close contact with the shutoff valve support member 40.
And a locking collar 55 as a locking member formed on the valve stem 51 so as to be locked on the upper surface of the.

The shutoff valve movement restriction ball 60 is a valve X for a high pressure gas container.
When the valve is inverted, the shutoff valve 50 is made inoperable, and the shutoff valve movement restricting ball 60 is provided in the space between the shutoff valve movement restricting ball receiving member 30 and the shutoff valve support member 40. It cannot be escaped and is stored so that it can roll freely.

The diameter-increasing frusto-conical shape forming the auxiliary valve seat 17 may be a diameter-increasing step portion shape.

The main valve seat 20 is used to close the main valve seat 16 in the space between the shutoff valve movement restricting ball receiving member 30 and the shutoff valve supporting member 40, and the high pressure gas container valve X is set as described above. When the end surface of the differential pressure eliminating projection 54 is brought into contact with the main valve body 20 when the valve is inverted, as shown in FIG.
An interval is provided such that 60 can roll and move into the inverted funnel-shaped recess 33 of the ball receiving member 30 for regulating the shutoff valve movement.

Further, for convenience of assembly, the internal threaded portion 19 of the valve body 10 is formed to have a larger diameter than the internal threaded portion 18, and by adapting to this, the inflow passage 14 is provided with a frustoconical auxiliary valve seat 17 for diameter expansion. is there.

The high-pressure gas container valve X according to the present invention configured as described above is mounted and fixed to the high-pressure gas container (not shown) by the male screw portion 11 of the valve body 10, and the main valve body 20 is lifted to raise the main valve. Open seat 16
After filling the container with high-pressure gas through the discharge passage 13 and the inflow passage 14, the main valve seat 20 is closed by the main valve body 20, and a gas device or the like (not shown) is attached to the female screw portion 13 ′ of the discharge passage 13. It is connected and used.

When the main valve seat 16 is opened by operating the handle 21 in use, the gas in the high-pressure gas container is allowed to flow through the gas passage holes 42 of the shutoff valve supporting member 40, ... And the shutoff valve movement restricting ball receiving member 30. Are supplied to the gas equipment through the gas flow holes 32, ..., Inflow passage 14, sub valve seat 17, main valve seat 16 and discharge passage 13. In a normal case, since the appropriate amount of gas is flowing in the inflow passage 14 and the shutoff valve 50 cannot be floated, the shutoff valve 50 is provided with the locking collar 55 as shown in FIG. And is supported by the shutoff valve support member 40.

By the way, if an accident occurs in the pipe system of gas equipment due to an earthquake or disaster while using gas, and the amount of gas flowing in the inflow path 14 increases rapidly, so-called overflow gas occurs The shutoff valve 50 is raised by the
As shown in the figure, the sub-valve element 53 comes into contact with the sub-valve seat 17 and instantaneously blocks the outflow of gas, and at the same time, the atmospheric pressure on the downstream side of the sub-valve element 53 and the high-pressure gas pressure on the upstream side Sub valve seat due to differential pressure
The 17 closed states will be reliably maintained. At this time,
The differential pressure eliminating projection 54 is projected upward from the main valve seat 16.

As mentioned above, after shutting off the outflow of gas, the shutoff valve
In order to return the valve 50 to the original state, the handle 21 is operated to lower the main valve body 20, and the shut-off valve 50 is pushed down by the descending main valve body 20 via the differential pressure relief projection 54. Simultaneously with the closing of the seat 16, the pressure on the downstream side and the pressure on the upstream side of the sub valve body 53 become the same, the differential pressure is eliminated, and the shutoff valve 50 returns to the original state.

Then, when the residual gas in the high pressure gas container after effective use of the gas is extracted by the vacuum pump, the handle 21
When the high pressure gas container is inverted after the main valve body 20 is closed by operating the main valve body 20, the shut-off valve 50 causes the main valve to pass through the differential pressure eliminating projection 54 as shown in FIG. By being supported by the body 20, it is prevented from descending, and the shutoff valve movement regulating ball 60 is a shutoff valve movement regulating ball receiving member.
It surely moves into the reverse funnel-shaped concave portion 33 of 30 by its own weight. Next, connect the discharge passage 13 to a vacuum pump (not shown), and
When the main valve seat 16 is opened by operating, the shutoff valve 50 follows the main valve body 20 and descends, but the locking collar 55 engages with the shutoff valve movement restricting ball 60 as shown in FIG. By being stopped, the shutoff valve 50 becomes inoperable, and the auxiliary valve seat 17 is not closed, so that it is possible to quickly extract the residual gas.

After extracting the residual gas in the high pressure gas container as described above,
When the handle 21 is operated to close the main valve seat 16 with the main valve body 20 and raise the high-pressure gas container to a normal state, the shut-off valve
The valve 50 is restored, and the shutoff valve movement regulating ball 60 is reliably restored to its original state by its own weight.

(Effects of the Invention) As is clear from the above description, the valve for a high pressure gas container according to the present invention is configured as described above, so that the main valve seat is opened to supply gas from the high pressure gas container. earthquake,
When a gas overflows due to a disaster or the like, not only can the shutoff valve be floated to instantaneously and automatically shut off the outflow of gas, but also in order to extract the residual gas in the high-pressure gas container, When the gas container is inverted, the shut-off valve cannot operate due to the shut-off valve movement-regulating ball that moves into the reverse funnel-shaped recess of the shut-off valve movement-regulating ball receiving member and the locking member that constitutes the shut-off valve. Since it is designed to be sham, the structure is simple without shaft support pins etc., it does not cause a failure, and when extracting residual gas,
When the high-pressure gas container is inverted, the shutoff valve can be surely rendered inoperable, which is an excellent effect.

[Brief description of drawings]

The drawings show an embodiment of a valve for a high-pressure gas container according to the present invention. FIG. 1 is a partially cutaway front view showing a state inside the valve at a normal gas flow rate, and FIG. Sectional view showing a state inside the valve when the shutoff valve is activated by gas,
FIG. 3 is a cross-sectional view showing the internal state of the valve when the high pressure gas container is inverted after closing the main valve body, and FIG. 4 is the inoperable state of the shutoff valve when extracting the residual gas in the high pressure gas container. FIG. X: Valve for high-pressure gas container 10: Valve body, 12: Valve chamber 13: Discharge passage, 14: Inlet passage 16: Main valve seat, 17: Sub valve seat 20: Main valve body 30: Shutoff valve movement restriction ball receiver Member 33: Reverse funnel-shaped recess, 40: Shutoff valve support member 50: Shutoff valve, 51: Valve stem 52 ₁ , 52 ₂ : Sub valve body support 53: Sub valve body, 55: Locking collar 60: Shut valve movement Regulatory balls

Claims (1)

[Scope of utility model registration request] 1. A sub-valve seat formed upstream of a main valve seat at an upper end edge of an inflow passage communicated with a discharge passage of a valve body attached to a high-pressure gas container through a valve chamber is used for an earthquake, disaster, etc. In a valve for a high-pressure gas container in which a shutoff valve that is automatically closed by an overflow gas due to is installed in the inflow passage so that it can float, in the middle of the inflow passage, the gas flow and the A ball receiving member for restricting the movement of the shut-off valve, which has a reverse funnel-shaped recess for receiving the ball for restricting the movement of the shut-off valve in the center of the lower surface, can be inserted through the valve stem of the shut-off valve. A shut-off valve support member that allows gas flow and a valve stem of the shut-off valve is attached and fixed to each of the parts, and the shut-off valve stem is provided with a ball receiving member for shut-off valve movement control and a shut-off valve support member. And the valve stem, and the valve stem is shielded during gas supply. A locking member allowed to lock the valve in the shut-off valve support member is provided, at the time of high-pressure gas container inversion is to move in the opposite funnel-shaped recess of the shut-off valve movement restricting ball receiving member,
A shut-off valve movement regulating ball that cooperates with the locking member to make the shut-off valve inoperable is housed in a space between the shut-off valve movement regulating ball receiving member and the shut-off valve support portion so that it cannot be escaped and is rollable. A valve for a high-pressure gas container, which is characterized by being used at most.