Long-distance natural gas pipeline protection structure

Abstract

The utility model relates to the technical field related to long-distance gas transmission, and discloses a long-distance natural gas pipeline protection structure which comprises a gas transmission pipe, a pressure relief pipe installed on the gas transmission pipe, a gas outlet pipe fixedly connected to the pressure relief pipe, a gas guide pipe fixedly connected to the gas outlet pipe, a mixing tank fixedly connected to the gas guide pipe, and a gas outlet hole formed in the mixing tank. An igniter is installed on the outer wall of the mixing tank, a pressure tank is installed at the top of the pressure relief pipe, a pressing plate and a driving plate are slidably connected into the pressure tank, and a spring is arranged between the pressing plate and the driving plate; safety pressure relief is carried out on the gas pipeline through the pressure valve with the adjustable safety pressure, the pressure valve is protected through the arrangement of the pressure relief pipe, the gas outlet pipe and the gas guide pipe, and therefore the situation that the pressure valve is affected by external force and accordingly the structure of the pressure valve is damaged and fails is avoided, and the safety of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of long-distance gas transmission, specifically a protection structure for long-distance natural gas pipelines. Background Technology

[0002] Long-distance pipelines refer to pipelines used to transport commodity media, such as oil and gas, between production sites, storage facilities, and user units, spanning provinces and cities, crossing rivers and roads, and containing booster pump stations along the way. However, pipelines are also sources of danger. For high-pressure gas pipelines, the internal pressure is high, and they transport flammable gases. If gas pressure is unstable during transportation, it may lead to excessive pressure within the pipeline and cause an explosion. If the pipeline is transporting natural gas, an explosion could also trigger a large fire, and the flammable and explosive high-pressure medium could spread rapidly, causing significant damage and incalculable losses along the route. In the closed-loop gas transportation process of long-distance pipelines, when the outlet pressure exceeds the set value of the regulating valve, and the regulating valve is not closed enough to control it within the set value range; or when the pressure in the pipeline within the station is too high, endangering the safety of the pipeline or equipment; or when the regulating valve malfunctions and fails to provide regulation and protection, high pressure relief is usually performed through pressure relief valves installed on the outlet pipeline. High-pressure relief is a supplement to pressure regulation and protection measures in the closed-loop gas transportation process. However, in existing technologies, when there is overpressure in long-distance pipelines, the high-pressure relief valve often fails to open properly to relieve pressure, which poses a great danger to the oil pipeline transportation. It may cause gas leakage, pipeline shutdown, explosion, or even fire due to excessive pressure. On the other hand, there are also defects such as high-pressure relief valve leakage or failure to close properly after opening. Utility Model Content

[0003] The purpose of this invention is to provide a protection structure for long-distance natural gas pipelines to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A protection structure for a long-distance natural gas pipeline includes a gas transmission pipe, a pressure relief pipe installed on the gas transmission pipe, a gas outlet pipe fixedly connected to the pressure relief pipe, a gas guide pipe fixedly connected to the gas outlet pipe, a mixing tank fixedly connected to the gas guide pipe, a gas outlet provided inside the mixing tank, an igniter installed on the outer wall of the mixing tank, a pressure tank installed at the top of the pressure relief pipe, a pressure plate and a drive plate slidably connected inside the pressure tank, a spring provided between the pressure plate and the drive plate, one end of a connecting rod fixedly connected to the drive plate, a pressure valve fixedly connected to the other end of the connecting rod, a pressure relief port provided between the gas transmission pipe and the pressure relief pipe, and the pressure relief port and the pressure valve cooperating with each other;

[0006] The pressure tank is equipped with a pressure regulating component for adjusting the elastic pressure of the spring acting on the drive plate.

[0007] As a further embodiment of this utility model: a limiting plate is fixedly connected to the inner wall of the pressure tank, and a limiting groove is provided in the pressure plate and the drive plate, and the limiting plate and the limiting groove slide relative to each other.

[0008] As a further embodiment of this utility model: a check valve is installed inside the outlet end of the air guide pipe, a valve cover is installed inside the check valve, a fixed cylinder is fixedly connected inside the mixing tank, one end of a telescopic rod is slidably connected inside the fixed cylinder, and the other end of the telescopic rod is fixedly connected to the valve cover.

[0009] As a further embodiment of this utility model, a pressure gauge is installed on the side of the gas supply pipe near the gas inlet.

[0010] As a further embodiment of this utility model: the pressure regulating component includes a threaded cylinder fixedly connected inside the pressure plate, a screw rotatably connected inside the pressure tank, the screw being threadedly connected to the threaded cylinder, and a lifting groove provided inside the connecting rod, with the screw sliding relative to the lifting groove.

[0011] As a further improvement of this utility model, a knob is fixedly connected to the drive end of the screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are: this utility model uses a pressure valve with adjustable safety pressure to safely depressurize the gas pipeline, and the pressure valve is protected by the setting of pressure relief pipe, gas outlet pipe and gas guide pipe, thereby avoiding damage and failure of the pressure valve structure due to external force, thus improving the safety of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a long-distance natural gas pipeline protection structure according to the present invention.

[0014] Figure 2 This is a cross-sectional view of a long-distance natural gas pipeline protection structure according to the present invention.

[0015] Figure 3 This is a cross-sectional view of a long-distance natural gas pipeline protection structure according to the present invention.

[0016] In the diagram: 1-Gas supply pipe, 2-Pressure relief pipe, 3-Gas outlet pipe, 4-Gas guide pipe, 5-Mixing tank, 6-Gas outlet, 7-Igniter, 8-Pressure relief port, 9-Pressure tank, 10-Pressure plate, 11-Drive plate, 12-Limit plate, 13-Limit groove, 14-Screw, 15-Threaded cylinder, 16-Spring, 17-Lifting groove, 18-Knob, 19-Check valve, 20-Fixed cylinder, 21-Telescopic rod, 22-Valve cover, 23-Pressure gauge, 24-Connecting rod, 25-Pressure valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] See Figures 1-3 In this embodiment of the utility model, a long-distance natural gas pipeline protection structure includes a gas transmission pipe 1, a pressure relief pipe 2 installed on the gas transmission pipe 1, a gas outlet pipe 3 fixedly connected to the pressure relief pipe 2, a gas guide pipe 4 fixedly connected to the gas outlet pipe 3, a mixing tank 5 fixedly connected to the gas guide pipe 4, a gas outlet 6 provided inside the mixing tank 5, an igniter 7 installed on the outer wall of the mixing tank 5, a pressure tank 9 installed on the top of the pressure relief pipe 2, a pressure plate 10 and a drive plate 11 slidably connected inside the pressure tank 9, a spring 16 provided between the pressure plate 10 and the drive plate 11, one end of a connecting rod 24 fixedly connected to the drive plate 11, a pressure valve 25 fixedly connected to the other end of the connecting rod 24, a pressure relief port 8 provided between the gas transmission pipe 1 and the pressure relief pipe 2, and the pressure relief port 8 and the pressure valve 25 cooperating with each other;

[0019] The pressure tank 9 is equipped with a pressure regulating component for adjusting the elastic pressure of the spring 16 acting on the drive plate 11.

[0020] This invention first adjusts the relative height of the pressure plate 10 within the pressure tank 9 based on the safe pressure of the gas pipeline 1, using a pressure regulating component. This pressure plate 10 then compresses the spring 16, ultimately regulating the elastic pressure exerted by the spring 16 on the drive plate 11. This elastic pressure, via the connecting rod 24, finally acts on the pressure valve 25. When gas is being transported through the gas pipeline 1, the side of the pressure valve 25 closest to the gas pipeline 1 experiences pressure from the high-pressure natural gas, while the side furthest from the gas pipeline 1 experiences the elastic pressure applied by the spring 16. Then, when the gas pipeline... When the pressure inside pipe 1 is too high, the pressure valve 25 on the side near the gas pipeline 1 is subjected to pressure exceeding the elastic pressure applied to the pressure valve 25 by the spring 16. At this time, the pressure valve 25 moves away from the pressure relief port 8, and the pressure relief port 8 opens. The high-pressure natural gas in the gas pipeline 1 flows into the pressure relief pipe 2 along the pressure relief port 8, then flows into the gas outlet pipe 3 along the pressure relief pipe 2, and finally flows into the mixing tank 5 along the gas guide pipe 4. Then, the natural gas is mixed with the outside air through the mixing tank 5, and then the mixture is ignited by the igniter 7, thereby burning the excess natural gas.

[0021] In one instance of this embodiment, please refer to Figures 1-3A limiting plate 12 is fixedly connected to the inner wall of the pressure tank 9. A limiting groove 13 is provided in the pressure plate 10 and the drive plate 11. The limiting plate 12 and the limiting groove 13 slide relative to each other. This utility model limits the axial movement between the pressure plate 10 and the drive plate 11 through the mutual cooperation of the limiting plate 12 and the limiting groove 13.

[0022] In one instance of this embodiment, please refer to Figures 1-3 A check valve 19 is installed inside the outlet of the gas pipe 4, and a valve cover 22 is installed inside the check valve 19. A fixed cylinder 20 is fixedly connected inside the mixing tank 5. One end of a telescopic rod 21 is slidably connected inside the fixed cylinder 20, and the other end of the telescopic rod 21 is fixedly connected to the valve cover 22. In this invention, the valve cover 22 is first pressed down into the check valve 19 by the weight of the valve cover 22, and the check valve 19 is sealed by the cooperation between the valve cover 22 and the check valve 19, thereby preventing external gas from flowing back into the gas pipe 4. Then, when high-pressure natural gas enters the gas pipe 4, the pressure of the high-pressure natural gas pushes the valve cover 22 to rise. At this time, the high-pressure natural gas enters the mixing tank 5 along the check valve 19.

[0023] In one instance of this embodiment, please refer to Figures 1-3 A pressure gauge 23 is installed on the side of the gas supply pipe 1 near the air inlet. The present invention uses the pressure gauge 23 to measure the pipe pressure in the gas supply pipe 1.

[0024] In one instance of this embodiment, please refer to Figures 1-3 The pressure regulating assembly includes a threaded cylinder 15 fixedly connected to the pressure plate 10, a screw 14 rotatably connected to the pressure tank 9, the screw 14 being threadedly connected to the threaded cylinder 15, a lifting groove 17 being provided in the connecting rod 24, the screw 14 sliding relative to the lifting groove 17, and a knob 18 fixedly connected to the drive end of the screw 14.

[0025] The pressure regulating component drives the screw 14 to rotate by turning the knob 18. The screw 14 converts its rotational motion into the linear motion of the screw cylinder 15 through a threaded connection with the threaded cylinder 15. The threaded cylinder 15 drives the pressure plate 10 to rise and fall within the pressure tank 9, thereby adjusting the relative height between the pressure plate 10 and the drive plate 11, which in turn compresses the spring 16. The pressure of the spring 16 acts on the drive plate 11.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A long distance natural gas pipeline protection structure comprising a gas pipeline, characterized in that, The gas conveying pipe is provided with a pressure relief pipe, the pressure relief pipe is fixedly connected with a gas outlet pipe, the gas outlet pipe is fixedly connected with a gas guide pipe, the gas guide pipe is fixedly connected with a mixing tank, the mixing tank is provided with a gas outlet hole, a lighter is installed on the outer wall of the mixing tank, a pressure tank is installed on the top of the pressure relief pipe, a pressure plate and a driving plate are slidably connected in the pressure tank, a spring is arranged between the pressure plate and the driving plate, one end of a connecting rod is fixedly connected to the driving plate, the other end of the connecting rod is fixedly connected with a pressure valve, a pressure relief port is arranged between the gas conveying pipe and the pressure relief pipe, and the pressure relief port and the pressure valve are matched with each other. A pressure adjusting assembly is installed in the pressure tank, and is used for adjusting the elastic pressure of the spring acting on the driving plate.

2. A long distance natural gas pipeline protection structure according to claim 1, characterized in that, A limiting plate is fixedly connected to the inner wall of the pressure tank, limiting grooves are arranged in the pressure plate and the driving plate, and the limiting plate and the limiting grooves slide relative to each other.

3. A long distance natural gas pipeline protection structure according to claim 1, wherein, A check valve is installed in the gas outlet end of the gas guide pipe, the check valve is provided with a valve cover, a fixed cylinder is fixedly connected in the mixing tank, one end of an extension rod is slidably connected in the fixed cylinder, and the other end of the extension rod is fixedly connected to the valve cover.

4. A long distance natural gas pipeline protection structure according to claim 1, wherein, A pressure gauge is installed on one side of the gas conveying pipe close to the gas inlet end.

5. A long distance natural gas pipeline protection structure according to claim 1, wherein, The pressure adjusting assembly comprises a threaded cylinder fixedly connected to the pressure plate, a screw rod is rotatably connected in the pressure tank, the screw rod is threadedly connected with the threaded cylinder, a lifting groove is arranged in the connecting rod, and the screw rod slides relative to the lifting groove.

6. A long distance natural gas pipeline protection structure according to claim 5, wherein, A knob is fixedly connected to the driving end of the screw rod.

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