JPS605366Y2 - Pressure regulating valve for high pressure gas - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-pressure gas cutoff valve, and more particularly to a gas cutoff valve equipped with a regulating valve that adjusts gas flow to a set pressure.

An object of the present invention is to provide a regulating valve in which gas always flows at a constant regulating pressure and no pressure difference occurs.

In the present invention, a float valve 2 that opens and closes by vertical movement is provided on a valve body 1, and is divided into a high pressure primary side 3 and a low pressure secondary side 4.
The float valve 2 is opened when the center rod 29 protruding therefrom is pushed down by the load of a sphere 31 movably arranged on the secondary side, while the piston 33 provided on the secondary side comes into contact with a claw piece 32 integrated with it. Alternatively, the valve is configured to be closed by the movement of the sphere 31, and an intermediate chamber 7 communicating with the float valve 2 from the primary side gas flow passage 6 communicating with the connection port 5 is located below the gas flow passage 6. A hole 9 that communicates with the piston 10 provided above the pressure reduction adjustment valve 8 from the intermediate chamber 7 is inserted.
The pressure reducing regulating valve 8 is equipped with an adjusting spring 11 and its pressure adjusting screw 12, and the pressure reducing regulating valve 8 is attached to the upper valve seat 13.
This is a pressure regulating valve for high pressure gas that faces the

In the figure, 14 is a valve lever, 15 is an outer cylinder, 16 is an upper receiving plate of the adjustment spring 11, 17 and 17 are O-rings, 12 is a press screw of the spring 11 screwed into the housing member 19, and a cap 20. to cover.

21 is a filter applied to the connection port member 22; 23 is a check valve that is pressed by gas pressure; a hole 24 is opened; a spring 25 is actuated;
When the valve 23 is pushed against the pressure 5, the hole 24 is opened through the gap formed by the plurality of protrusions provided on the circumferential surface of the valve 23.
Gas flows through.

26 is a connection member to which the connection port member 5 is attached.

Next, the structure of the shutoff valve body will be explained in detail.
28 is a normal valve provided in cylinder B, and 28 is a pressure reducing valve.

To explain the structure inside the shutoff valve main body 1, a float valve 2 that can move up and down is accommodated in the main body 1, and a valve seat 3 on which the float valve 2 approaches and separates the upper end of a central rod 29 penetrating through the center thereof.
A piston 3 that protrudes to the secondary side 4 through 0, houses a sphere 31 in the secondary side 4, and is provided with a claw piece 32 that contacts the sphere 31.
3 is inserted into a cylinder portion 34 formed above the main body 1.

The hollow part 35 of the piston 33 is equipped with a coil spring 36 whose elasticity is weaker than the normal pressure of the gas, so that the cylinder part 34
The coil spring 36 is received and supported by a receiving plate 38 inside the display cap 37 which is protruded from the upper end of the display cap 37 .

Further, a color display tube portion 40 exposed through a hole 39 provided in the display cap 37 is connected to the piston 33 described above.

Furthermore, the main body 1 is provided with bypass passages 41 and 41' that communicate with the primary side 3 and the secondary side 4 regardless of the valve seat 30, a valve seat 42 is formed in the bypass passage 41, and a manual valve 43 is provided. be.

44 is a push button attached to the valve rod 45 of the manual valve 43; 46
47 is an O-ring, and 47 is a coil spring acting on the push button 44. The push button 44 is pushed through a receiving member 48 screwed onto the valve rod 45.

Reference numerals 49 and 49' denote guide members for the valve rod 45 screwed into the bypass passage 41.

Further, the receiving plate 38 is adjustably attached to the cap 37 by a screw 51 screwed into a female threaded member 50 integral with the cap 37.

52 is a spring acting on the float valve 2, 53 is a buffer ring, 54 is a spring acting on the valve rod 45, and 55 is a center rod 2.
The guide plate 9 is a closing plate 56, and the guide plate 55 is screwed into the guide plate 55 through an intermediate screw ring 557.

58 is a backing, 59 is an O-ring provided at various places on the main body 3, 60 and 61 are backings, 62 is a fitting to the valve 27, and 63 is a set screw.

Next, the operating state will be explained.

The adjustment valve 8 is set by turning the adjustment screw 12 so that gas at a constant pressure is always sent to the valve chamber 4 on the primary side 3 via the intermediate chamber 7.

Further, the intermediate chamber 7 is in contact with the piston 10 through the hole 9, and the regulating valve 8 is controlled by the pressure balance under the piston.

The pressure coming out of the passage 6, the pressure inside the regulating valve 8, and the pressure applied to the lower part of the piston 10 from the intermediate chamber 7 are adjusted by the spring 11 to keep the pressure sent to the valve body 1 constant even if the pressure source fluctuates greatly. That's how it is.

When the push button 44 is pressed with the float valve 2 closed, the gas on the primary side 3 enters the secondary side 4 via the bypass passage 41°41', so the primary side 3 is the same as the secondary side 4. The coil spring 36 is pushed by the gas pressure, and the piston 3
3 rises, and the claw piece 32 separates from the sphere 31. Since the sphere 31 becomes free, it pushes down the rod 29 with its weight, and the float valve 2 descends, and the gas on the primary side 3 passes through the valve seat 30 to the secondary side. Flows to side 4.

Then release the push button and use it normally.

Next, when the gas pressure drops abnormally, such as when there is a gas leak on the secondary side 4, the piston 33 descends due to the action of the coil spring 36.

Therefore, the ball 31 is pushed up by the claw piece 32, the center rod 29 becomes free, and the float valve 2 is moved to the valve seat 3 by the gas pressure on the primary side 3.
0 to cut off the backflow of gas.

In this way, if there is a leak or crack in the pipe and the gas pressure on the secondary side 4 drops, the gas supply will be cut off, and the color display will change due to the action of the claws, making it possible to detect a leak in the pipe.

Furthermore, if the pressure suddenly fluctuates due to an unexpected disaster that occurs during normal use and gas leaks from the secondary side 4, the gas supply is automatically cut off immediately and safely.

Even when the cylinder falls down due to an earthquake or other reason, the sphere 31 moves, and the gas supply is stopped in this case as well.

Furthermore, when there is no gas pressure, the float valve 2 is closed because the sphere 31 is pushed up by the claw piece 32, and when there is no abnormality in the piping or pressure when replacing the cylinder, the check valve 23 is closed and the inside of the piping is closed. Automatically monitor gas leaks.

Since the present invention has the configuration as explained above, the primary side 3
When the set gas pressure adjusted by the spring 11 collapses, the regulating valve 8 closes immediately.

Particularly, in the present invention, a pressure reducing regulating valve 8 is provided below the gas flow passage 6, and the intermediate chamber 7 and the piston 10 of the valve 8 are connected to each other via a hole 9.
Since they are kept at the same pressure, they are balanced and no differential pressure occurs.

In other words, it has the effect of being able to constantly flow gas at the set pressure,
In addition, it is possible to maintain a high pressure up to the regulating valve 8 and a low pressure beyond that, and has the feature of accurate operation.

[Brief explanation of drawings]

The drawings show an embodiment of the pressure regulating valve for high-pressure gas according to the present invention. Fig. 1 is a perspective view, Fig. 2 is a vertical side view, Fig. 3 is a longitudinal front view, and Fig. 4 is an operating state. FIG. 1... Valve body, 2... Float valve, 3
...Primary side, 4...Secondary side, 5...
...Connection port, 6...Gas flow passage, 7...
...Intermediate room, ...Reducing pressure adjustment valve, 9...
・Hole, 10...Zeston, 11...Adjustment spring, 12...Adjustment screw, 13...
... Valve seat, 29 ... Center rod, 31 ...
Sphere, 32...Claw piece, 33...Piston.

Claims (1)

[Scope of utility model registration request] A float valve 2 that opens and closes by vertical movement is provided on the valve body 1 to divide it into a high-pressure primary side 3 and a low-pressure secondary side 4, and the float valve 2 can move a central rod 29 protruding from it to the secondary side. The valve is pushed down by the load of the sphere 31 placed at 2, while the valve opens at 2.
It has a structure in which the valve is closed by contact between a piston 33 provided on the next side and two claw pieces 32 or movement of the sphere 31, and the float valve 2 A pressure reduction regulating valve 8 located below the gas flow passage 6 is installed in the intermediate chamber 7 which communicates with the gas flow passage 6, and a hole 9 is provided which communicates with the piston 10 provided above the pressure reducing regulating valve 8 from the intermediate chamber 7. This is a pressure regulating valve for high-pressure gas, in which the pressure reducing regulating valve 8 is equipped with an regulating spring 11 and its pressure regulating screw 12, and the lower pressure reducing regulating valve 8 is opposed to an upper valve seat 13.