Pressure reducing valve of natural gas conveying pipeline

Abstract

The utility model relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve for a natural gas conveying pipeline, which comprises a pressure reducing valve body, a gas inlet pipe, a fixed pipe, a threaded groove, a sealing groove, a sealing gasket, a sealing bearing, a pressure reducing valve cover and a pressure reducing valve cover, a gas pipe is arranged on the surface of the sealing bearing, a positioning ring is arranged on the surface of the sealing screw pipe, and a rubber pad is arranged at the bottom of the positioning ring; the pressure reducing valve has the beneficial effects that when the pressure reducing valve needs to be matched with the pressure reducing valve body to convey natural gas, firstly, a sealing screw pipe is matched with a sealing bearing to rotate, and the sealing screw pipe is screwed into a threaded groove, so that a sealing gasket arranged at one end of the sealing screw pipe can be extruded; and then through the extrusion effect of a rubber pad arranged at the bottom of the positioning ring in a sealing groove, the connection sealing performance of the sealing solenoid is improved, the connection sealing performance of the gas conveying pipe and the pressure reducing valve body is improved, and therefore safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducing valves, in particular to a pressure reducing valve for a natural gas transmission pipeline. Background Art

[0002] Natural gas pressure reducing valve is a device used to control the pressure behind the valve. The operation of the pressure reducing valve is controlled by the pressure behind the valve. When the pressure sensor detects that the valve pressure indication increases, the valve opening of the pressure reducing valve decreases; when the pressure behind the pressure reducing valve decreases, the valve opening of the pressure reducing valve increases to meet the control requirements. The pressure reduction ratio of the steam pressure reducing valve must be higher than the system value to a certain extent. Even at the maximum or minimum flow rate, it should be able to respond to the positive or negative control signal.

[0003] However, during the long-term use of the pressure reducing valve, some pressure reducing valves are easily leaked at the connection between the pipeline and the pressure reducing valve when connected to the pipeline, which increases safety hazards and is inconvenient for workers to use. To this end, the utility model proposes a natural gas transmission pipeline pressure reducing valve to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a natural gas transmission pipeline pressure reducing valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a natural gas transmission pipeline pressure reducing valve, comprising: a pressure reducing valve body, an air inlet pipe provided on the surface of the pressure reducing valve body, a fixed pipe provided at one end of the air inlet pipe, a threaded groove and a sealing groove provided on the surface of the fixed pipe;

[0006] A sealing coil is provided with a sealing gasket at one end of the sealing coil, a sealing bearing is provided at the other end of the sealing coil, an air delivery pipe is provided on the surface of the sealing bearing, a positioning ring is provided on the surface of the sealing coil, and a rubber pad is provided at the bottom of the positioning ring.

[0007] Preferably, the fixing pipe is fixedly connected to the end face of the air inlet pipe, the sealing groove is an annular plate structure, and the sealing spiral pipe can be screwed into the threaded groove.

[0008] Preferably, the sealing gasket is fixedly connected to the end face of the sealing coil, the positioning ring is fixedly connected to the outer ring surface of the sealing coil, the rubber gasket is an annular plate structure, and the rubber gasket can be squeezed into the sealing groove.

[0009] Preferably, the side of the sealing coil is provided with a receiving groove, there are two groups of receiving grooves, the two groups of receiving grooves are symmetrically distributed about the sealing coil, and the outer ring surface of the sealing coil is provided with auxiliary blocks, there are two groups of auxiliary blocks, the two groups of auxiliary blocks are symmetrically distributed about the sealing coil.

[0010] Preferably, a rotating rod is provided on the side of the storage groove, and an auxiliary plate is sleeved on the surface of the rotating rod, and the auxiliary plate can rotate around the rotating rod.

[0011] Preferably, the auxiliary plate is provided with an elastic sheet on the side thereof, and two groups of elastic sheets are provided. The two groups of elastic sheets are symmetrically distributed about the auxiliary plate. A positioning groove is provided on the side of the receiving slot, and the elastic sheet can be inserted into the positioning groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The natural gas transmission pipeline pressure reducing valve proposed by the utility model, when in use, when it is necessary to cooperate with the pressure reducing valve body to transport natural gas, first the sealing spiral tube is rotated in cooperation with the sealing bearing, so that the sealing spiral tube is screwed into the threaded groove, thereby squeezing the sealing gasket provided at one end of the sealing spiral tube, and then cooperating with the squeezing effect of the rubber gasket provided at the bottom of the positioning ring in the sealing groove, thereby increasing the connection sealing of the sealing spiral tube, improving the sealing of the connection between the gas transmission pipe and the pressure reducing valve body, and thus improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a partial cross-sectional view of the structure of the utility model;

[0016] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0017] Figure 4 This is a schematic diagram of the structural sealing spiral tube of the utility model.

[0018] In the figure: 1. Pressure reducing valve body; 2. Air inlet pipe; 3. Fixed pipe; 4. Threaded groove; 5. Sealing groove; 6. Sealing spiral tube; 7. Sealing gasket; 8. Sealing bearing; 9. Air supply pipe; 10. Positioning ring; 11. Rubber pad; 12. Storage groove; 13. Auxiliary block; 14. Rotating rod; 15. Auxiliary plate; 16. Elastic sheet; 17. Positioning groove. DETAILED DESCRIPTION

[0019] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-Figure 4 The utility model provides a technical solution: a natural gas transmission pipeline pressure reducing valve, the natural gas transmission pipeline pressure reducing valve comprising: a pressure reducing valve body 1, an air inlet pipe 2 is provided on the surface of the pressure reducing valve body 1, a fixed pipe 3 is provided at one end of the air inlet pipe 2, and a threaded groove 4 and a sealing groove 5 are opened on the surface of the fixed pipe 3;

[0021] A sealing coil 6 is provided with a sealing gasket 7 at one end of the sealing coil 6, a sealing bearing 8 is provided at the other end of the sealing coil 6, an air delivery pipe 9 is provided on the surface of the sealing bearing 8, a positioning ring 10 is provided on the surface of the sealing coil 6, and a rubber pad 11 is provided at the bottom of the positioning ring 10;

[0022] When it is necessary to transport natural gas in conjunction with the pressure reducing valve body 1, the sealing spiral tube 6 is first rotated in conjunction with the sealing bearing 8, and the sealing spiral tube 6 is screwed into the threaded groove 4, so that the sealing gasket 7 provided at one end of the sealing spiral tube 6 can be squeezed, and then the rubber gasket 11 provided at the bottom of the positioning ring 10 is squeezed in the sealing groove 5, thereby increasing the connection sealing of the sealing spiral tube 6, improving the sealing of the connection between the gas pipeline 9 and the pressure reducing valve body 1, and thus improving safety.

[0023] Example 2: On the basis of Example 1, in order to improve the sealing performance of the connection between the air delivery pipe 9 and the air intake pipe 2, a sealing coil 6 is provided, the fixing pipe 3 is fixedly connected to the end face of the air intake pipe 2, the sealing groove 5 is an annular plate-shaped structure, the sealing coil 6 can be screwed into the threaded groove 4, the sealing gasket 7 is fixedly connected to the end face of the sealing coil 6, the positioning ring 10 is fixedly connected to the outer annular surface of the sealing coil 6, the rubber pad 11 is an annular plate-shaped structure, and the rubber pad 11 can be squeezed into the sealing groove 5;

[0024] During use, when it is necessary to connect the air supply pipe 9 with the air intake pipe 2, the sealing screw 6 can be rotated in conjunction with the sealing bearing 8, and then the sealing screw 6 can be conveniently screwed into the threaded groove 4. The setting of the sealing gasket 7 is used to increase the extrusion sealing between the end face of the sealing screw 6 and the sealing groove 5, and then the rubber gasket 11 set at the bottom of the positioning ring 10 is used to make the rubber gasket 11 squeezed into the sealing groove 5 through the rotation displacement of the sealing screw 6, thereby increasing the gap sealing between the sealing screw 6 and the air intake pipe 2, thereby improving the connection sealing problem between the air supply pipe 9 and the air intake pipe 2.

[0025] Embodiment 3: On the basis of embodiment 2, in order to facilitate the rotation of the sealing spiral tube 6, an auxiliary plate 15 is provided, and an elastic sheet 16 is provided on the side of the auxiliary plate 15. The elastic sheet 16 is provided in two groups, and the two groups of elastic sheets 16 are symmetrically distributed about the auxiliary plate 15. A positioning groove 17 is provided on the side of the receiving groove 12. The elastic sheet 16 can be inserted into the positioning groove 17. A rotating rod 14 is provided on the side of the receiving groove 12. The auxiliary plate 15 is sleeved on the surface of the rotating rod 14. The auxiliary plate 15 can rotate around the rotating rod 14. A receiving groove 12 is provided on the side of the sealing spiral tube 6. The receiving groove 12 is provided in two groups. The two groups of receiving grooves 12 are symmetrically distributed about the sealing spiral tube 6. An auxiliary block 13 is provided on the outer annular surface of the sealing spiral tube 6. The auxiliary block 13 is provided in two groups, and the two groups of auxiliary blocks 13 are symmetrically distributed about the sealing spiral tube 6.

[0026] When the sealing spiral tube 6 needs to be rotated during use, the sealing spiral tube 6 can be rotated by first inserting a tool into the auxiliary block 13. When the staff does not carry tools, the auxiliary plate 15 can be rotated around the rotating rod 14 to rotate the auxiliary plate 15 out of the storage groove 12. Then, the sealing spiral tube 6 can be conveniently rotated by setting the two sets of auxiliary plates 15. When the auxiliary plate 15 is not in use, the auxiliary plate 15 can be pressed into the storage groove 12 and the elastic sheet 16 provided on the side of the auxiliary plate 15 can be pressed and squeezed to make the elastic sheet 16 inserted into the positioning groove 17. Thereby, the auxiliary plate 15 can be fixed in the storage groove 12 and the storage groove 12 can be filled. The elastic sheet 16 is made of rubber.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas transmission pipeline pressure reducing valve, characterized by: The natural gas transmission pipeline pressure reducing valve comprises: a pressure reducing valve body (1); an air inlet pipe (2) is provided on the surface of the pressure reducing valve body (1); a fixed pipe (3) is provided at one end of the air inlet pipe (2); and a threaded groove (4) and a sealing groove (5) are provided on the surface of the fixed pipe (3); A sealing coil (6) is provided with a sealing gasket (7) at one end of the sealing coil (6), a sealing bearing (8) is provided at the other end of the sealing coil (6), an air delivery pipe (9) is provided on the surface of the sealing bearing (8), a positioning ring (10) is provided on the surface of the sealing coil (6), and a rubber pad (11) is provided at the bottom of the positioning ring (10).

2. A natural gas transmission pipeline pressure reducing valve according to claim 1, characterized in that: The fixed pipe (3) is fixedly connected to the end face of the air inlet pipe (2); the sealing groove (5) is an annular plate-shaped structure; and the sealing spiral pipe (6) can be screwed into the threaded groove (4).

3. A natural gas transmission pipeline pressure reducing valve according to claim 1, characterized in that: The sealing gasket (7) is fixedly connected to the end face of the sealing spiral tube (6), the positioning ring (10) is fixedly connected to the outer ring surface of the sealing spiral tube (6), and the rubber gasket (11) is an annular plate structure. The rubber gasket (11) can be squeezed into the sealing groove (5).

4. A natural gas transmission pipeline pressure reducing valve according to claim 1, characterized in that: The sealing coil (6) is provided with a receiving groove (12) on its side, and the receiving groove (12) is provided in two groups, and the two groups of receiving grooves (12) are symmetrically distributed with respect to the sealing coil (6); the outer ring surface of the sealing coil (6) is provided with an auxiliary block (13), and the auxiliary block (13) is provided in two groups, and the two groups of auxiliary blocks (13) are symmetrically distributed with respect to the sealing coil (6).

5. A natural gas transmission pipeline pressure reducing valve according to claim 4, characterized in that: A rotating rod (14) is provided on the side of the receiving groove (12), and an auxiliary plate (15) is sleeved on the surface of the rotating rod (14). The auxiliary plate (15) can rotate around the rotating rod (14).

6. A natural gas transmission pipeline pressure reducing valve according to claim 5, characterized in that: The auxiliary plate (15) is provided with an elastic sheet (16) on the side thereof. The elastic sheet (16) is provided with two groups. The two groups of elastic sheets (16) are symmetrically distributed about the auxiliary plate (15). A positioning groove (17) is provided on the side of the receiving groove (12). The elastic sheet (16) can be inserted into the positioning groove (17).

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