CN201159317Y - Plug-in compressed natural gas two-stage pressure reducing valve - Google Patents

Abstract

A plug-in compressed natural gas two-stage pressure reducing valve, including a valve body, an end cover, an adjusting screw, a spring pressure block, an adjusting spring, a spring washer, a diaphragm, a valve, a valve spring and an adjusting handle, and a first-stage pressure reducing valve Chamber, secondary decompression chamber, low pressure gauge, high pressure gauge, antifreeze outlet joint, quick plug joint and "O" type seal ring; spring pressure block, adjustment spring, spring washer, diaphragm, valve and valve spring are installed in the first In the decompression chamber and the secondary decompression chamber, the two decompression chambers are connected through the passage hole, the adjusting screw is installed outside the spring pressure block of the first decompression chamber, and the adjustment handle is installed outside the spring pressure block of the secondary decompression chamber; The low-pressure gauge and the high-pressure gauge are respectively connected with the secondary decompression chamber and the primary decompression chamber; the quick plug connector is connected with the primary valve chamber, and the "O" type sealing ring is installed in the concave groove of the quick plug connector; the antifreeze outlet connector is connected with the The secondary decompression chamber is connected. It has reasonable and compact structure, strong applicability, easy operation, safe and reliable work.

Description

Plug-in compressed natural gas two-stage pressure reducing valve

1. Technical field

The utility model belongs to a safety valve, in particular to a pressure reducer for high-pressure gas.

2. Background technology

At present, most of the pressure reducers used in compressed natural gas adopt single-stage decompression. This kind of pressure reducer is only suitable for use in the decompression process with high working pressure and little change in pressure difference; , The decompression process with large pressure difference changes is not applicable. Even if it is to be used, it can only be used by connecting two single-stage pressure reducers in series, but this will inevitably bring about the disadvantages of increased volume, cumbersome operation, neither economical nor safe and convenient. In addition, the existing natural gas pressure reducers are connected with high-pressure containers (such as industrial gas cylinders) with threaded connections. When using gas, the operator is time-consuming and laborious, and the work efficiency is low, and the work is unreliable and unsafe.

3. Contents of the invention

Aiming at the defects of the above-mentioned prior art, it is planned to design and manufacture a plug-in type natural gas two-stage pressure reducing valve, which has a reasonable and compact structure, strong applicability, easy operation, and safe and reliable operation.

The technical scheme that the utility model takes is as follows.

A plug-in compressed natural gas two-stage pressure reducing valve, including a valve body, an end cover, an adjusting screw, a spring pressure block, an adjusting spring, a spring washer, a film, a valve, a valve spring and an adjusting handle, is characterized in that:

1) It also has a first-level decompression chamber, a second-level decompression chamber, a low-pressure gauge, a high-pressure gauge, an antifreeze outlet joint, a quick plug joint and an "O"-shaped sealing ring;

2) The spring pressing block, adjusting spring, spring washer, film, valve and valve spring are installed in the primary decompression chamber and the secondary decompression chamber. The screw is installed outside the spring pressure block of the primary decompression chamber, and the adjustment handle is installed outside the spring pressure block of the secondary decompression chamber;

3) The low-pressure gauge and the high-pressure gauge are installed on the valve body and communicate with the secondary decompression chamber and the primary decompression chamber respectively;

4) The quick plug connector is installed on the valve body and communicates with the primary valve chamber through the air inlet hole, and the "O" type sealing ring is assembled in the concave groove of the quick plug connector;

5) There are multiple concave grooves on the antifreeze outlet joint, which are installed on the valve body and communicate with the secondary decompression chamber through the air outlet.

The plug-in type natural gas two-stage decompression valve of the utility model has reasonable and compact structure, small volume and strong applicability, and is especially suitable for the decompression process with large pressure difference changes. It is connected to the industrial gas cylinder and operated when using gas. The operator saves time and effort, is easy to operate, has high work efficiency, and works safely and reliably.

4. Description of drawings

Fig. 1 is a schematic diagram of the assembly half-section plane structure of the plug-in compressed natural gas two-stage pressure reducing valve of the present invention;

FIG. 2 is a schematic diagram of a partial cross-sectional plane structure taken along the line A of FIG. 1 .

In the figure, 1-adjusting screw, 2-spring pressing block, 3-adjusting spring, 4-end cover, 5-spring washer, 6-film, 7-valve, 8-valve spring, 9-valve body, 10 -Adjustment handle, 11-first-level decompression chamber, 12-secondary decompression chamber, 13-antifreeze outlet joint, 14-air outlet, 15-low pressure gauge, 16-high pressure gauge, 17-intake hole, 18-quick Plug joint, 19-"O" type sealing ring, 20-passage hole, 21-primary valve chamber.

5. Specific implementation plan

The specific structure of the plug-in type natural gas two-stage pressure reducing valve of the utility model will be further described below in conjunction with the accompanying drawings.

A plug-in compressed natural gas two-stage pressure reducing valve, including a valve body 9, an end cover 4, an adjustment screw 1, a spring pressure block 2, an adjustment spring 3, a spring washer 5, a film 6, a valve 7, and a valve spring 8 And adjusting handle 10, it is characterized in that:

1) It also has a primary decompression chamber 11, a secondary decompression chamber 12, a low pressure gauge 15, a high pressure gauge 16, an antifreeze outlet connector 13, a quick plug connector 18 and an "O" type seal ring 19;

2) The spring pressing block 2, the adjusting spring 3, the spring washer 5, the film 6, the valve 7 and the valve spring 8 are installed in the primary decompression chamber 11 and the secondary decompression chamber 12, the primary decompression chamber 11 and the The secondary decompression chamber 12 communicates through the channel hole 20, the adjusting screw 1 is installed outside the spring pressure block 2 of the primary decompression chamber 11, and the adjusting handle 10 is installed outside the spring pressure block 2 of the secondary decompression chamber 12;

3) The low-pressure gauge 15 and the high-pressure gauge 16 are installed on the valve body 9, and communicate with the secondary decompression chamber 12 and the primary decompression chamber 11 respectively;

4) The quick plug connector 18 is installed on the valve body 9 and communicates with the primary valve chamber 21 through the air inlet 17, and the "O" type sealing ring 19 is assembled in the concave groove of the quick plug connector 18;

5) The antifreeze outlet joint 13 is provided with multiple concave grooves, installed on the valve body 9 and communicated with the secondary decompression chamber 12 through the air outlet 14 .

Claims (1)

1, a kind of plug-in type compressed natural gas twin-stage reduction valve, include valve body (9), end cap (4), adjusting screw (1), spring lock block (2), Regulation spring (3), compression spring (5), film (6), valve (7), shutter spring (8) and regulating handle (10), it is characterized in that:

1) it also has one-level underpressure chamber (11), second depressurized chamber (12), low-pressure meter (15), high pressure gauge (16), antifreeze outlet connection (13), quick connection-peg (18) and " O " RunddichtringO (19);

2) spring lock block (2), Regulation spring (3), compression spring (5), film (6), valve (7) and shutter spring (8) be installed in the one-level underpressure chamber (11) and second depressurized chamber (12) in, one-level underpressure chamber (11) and second depressurized chamber (12) are communicated with by port hole (20), adjusting screw (1) is installed in spring lock block (2) outside of one-level underpressure chamber (11), and regulating handle (10) is installed in spring lock block (2) outside of second depressurized chamber (12);

3) low-pressure meter (15) and high pressure gauge (16) are installed on the valve body (9), and are communicated with second depressurized chamber (12) and one-level underpressure chamber (11) respectively;

4) quick connection-peg (18) is installed on the valve body (9) and by inlet hole (17) and is communicated with one-level bonnet (21), and " O " RunddichtringO (19) is assemblied in the concave groove of quick connection-peg (18);

5) offer a plurality of concave grooves on the antifreeze outlet connection (13), be installed in valve body (9) and upward and by air outlet hole (14) be communicated with second depressurized chamber (12).

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