Natural gas transmission flow adjusting device

Abstract

The utility model provides a natural gas transmission flow adjusting device which comprises a valve shell, a gas inlet is formed in the bottom of the valve shell, a plurality of gas outlets are formed in the side surface of the valve shell, a valve body and a valve element are arranged in the valve shell, the valve body is arranged on the outer side of the valve element in a sleeved mode, and a plurality of first gas inlet holes are formed in the side wall of the valve body in the radial direction. A plurality of second air inlet holes are axially formed in the side wall of the valve element, the first air inlet holes are evenly distributed in the middle of the side surface of the valve body, and the second air inlet holes are evenly distributed in the middle of the side surface of the valve element. The bottom of the valve core is communicated with the air inlet; a lead screw penetrates through the top of the valve element, sealing rings are arranged between the center of the valve element and the lead screw and between the center of the valve body and the lead screw, and the lead screw penetrates through the valve shell and is connected with a driving device. A bolt is arranged on the lead screw in a penetrating mode, the outer ring of the bolt is fixedly connected with a limiting plate, and a reset spring is fixedly connected between the bottom of the limiting plate and the top of the valve element.

Description

Technical Field

[0001] This utility model relates to the field of natural gas transportation technology, specifically a natural gas transmission flow regulation device. Background Technology

[0002] As natural gas usage becomes more common, the demand for natural gas pipelines is also increasing. In existing technologies, natural gas is transported through pipelines, and adjusting the flow rate too much or too little can affect the flow of natural gas.

[0003] For example, Chinese patent application number CN202021710487.X discloses a natural gas transmission pipeline flow regulation device. By setting up a motor, regulator, camera and measuring tube, when the transmitted gas pressure is low, the regulator will start the motor inside the main body. The motor drives the inner tube to rotate, so that the through hole on the inner tube corresponds to the through hole on the conduit, opening the through hole on the conduit. Then the gas supply system delivers gas pressure through the compensation pipe and delivers it to the main body through the through hole on the conduit to compensate for the gas pressure. In use, if the regulator's preset pressure threshold is set too high, it will affect the flow of gas. The prior art cannot adaptively adjust this. Summary of the Invention

[0004] This utility model provides a natural gas transmission flow rate regulating device, the purpose of which is to solve the technical problem in the prior art where excessively large preset pressure threshold settings can affect the flow of natural gas.

[0005] This utility model provides a natural gas transmission flow regulating device, including a valve shell, the bottom of which is an air inlet, and multiple air outlets on the side surface of the valve shell. A valve body and a valve core are disposed inside the valve shell, with the valve body sleeved on the outside of the valve core. Multiple first air inlets are radially arranged on the side wall of the valve body; multiple second air inlets are axially arranged on the side wall of the valve core. The first air inlets are evenly distributed in the middle of the side surface of the valve body, and the second air inlets are evenly distributed in the middle of the side surface of the valve core. The bottom of the valve core communicates with the air inlet. A lead screw passes through the top of the valve core, and sealing rings are respectively provided between the center of the valve core and the center of the valve body and the lead screw. The lead screw passes through the valve shell and is connected to a driving device. A bolt passes through the lead screw, and a limit plate is fixedly connected to the outer ring of the bolt. A return spring is fixedly connected between the bottom of the limit plate and the top of the valve core.

[0006] Furthermore, the portion of the lead screw located inside the valve housing is threaded, and the lead screw is sealed to the valve housing.

[0007] Furthermore, the first air inlet and the second air inlet are rectangular, the first air inlet and the second air inlet have the same length, and the distance between the top of the first air inlet and the top of the valve body is greater than the distance between the second air inlet and the top of the valve core.

[0008] Furthermore, the distance between the bottom of the first air inlet and the bottom of the valve body is greater than the distance between the top of the second air inlet and the bottom of the valve core.

[0009] Furthermore, a limiting ring is provided at the bottom of the inner wall of the valve body, and the inner diameter of the limiting ring is smaller than the inner diameter of the valve core.

[0010] Furthermore, the drive device includes a motor located at the end of the lead screw away from the valve housing.

[0011] Furthermore, a sealing layer is provided on the inner wall of the valve body; the outer wall side surface of the valve core abuts against the sealing layer.

[0012] This utility model has at least the following beneficial effects:

[0013] This invention provides a natural gas transmission flow regulating device. Through a piston-structured valve body and valve core, a motor lowers a limit plate to ensure the valve body's maximum threshold. When the gas pressure in the inlet pipeline is greater than the gas pressure in the outlet pipeline, the natural gas automatically opens the valve core. A return spring ensures automatic adjustment of the valve core position under different gas pressures, thereby preventing unstable pipeline gas pressure caused by an excessively high preset threshold. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a natural gas transmission flow regulating device according to the present invention;

[0015] Figure 2 This is a schematic diagram of the valve body of a natural gas transmission flow regulating device according to the present invention;

[0016] Figure 3 This is a schematic diagram of the valve core of a natural gas transmission flow regulating device according to the present invention;

[0017] In the diagram: 1. Valve housing; 2. Valve body; 3. Valve core; 4. First air inlet; 5. Second air inlet; 6. Sealing layer; 7. Lead screw; 8. Sealing ring; 9. Bolt; 10. Limiting plate; 11. Return spring; 12. Limiting ring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-3 This utility model provides a natural gas transmission flow regulating device, including a valve housing 1. The valve housing 1 has an axially oriented air inlet at its bottom and is cylindrical. Multiple air outlets are radially oriented in the middle of the valve housing 1. A sealing port is formed at the top of the valve housing 1, and a lead screw 7 passes through the sealing port. A straight rod is positioned above the sealing port, and a lead screw is positioned below the sealing port. A motor is fixedly connected to the top of the lead screw 7. A valve body 2 is fixedly connected to the top of the inner wall of the valve housing 1. The valve body 2 is a cylindrical cavity with a sealed top and an opening at the bottom, which communicates with the air inlet. Multiple longitudinal rectangular first air inlets 4 are evenly distributed on the side surface of the valve body 2. In the middle of the valve body 2, there is a gap between the middle of the valve body 2 and the valve shell 1. A valve core 3 is slidably connected inside the valve body 2. The valve core 3 is a cylindrical cavity with a sealed top and an open bottom. Multiple second air inlets 5 are provided on the side wall of the valve core 3. The second air inlets 5 are longitudinal rectangular air inlets. The lead screw 7 passes through the center of the top of the valve core 1. A sealing ring is provided between the lead screw 71 and the valve core. A bolt 9 is slidably provided on the lead screw 7 between the valve core 3 and the valve body 2. A limit plate 10 is fixedly connected to the outer ring of the bolt 9. A return spring 11 is fixedly connected between the bottom of the limit plate 10 and the valve core 3. A sealing ring 8 is provided between the lead screw and the valve body 2 and the valve core 3 and the lead screw 7 respectively.

[0020] When the valve threshold needs to be opened to the maximum, the motor pulls the limit plate 10 to the top of the valve body 2. At this time, when the air pressure in the air passage is greater than the air pressure in the valve, the gas in the valve body 2 pushes the valve core 3 to move upward and compresses the return spring. When the air pressure in the air passage fluctuates, the return spring will be compressed to different lengths. In use, it is only necessary to preset the maximum threshold in the pipeline and then move the limit plate according to the maximum threshold. When the pressure is large, the spring is compressed to the limit. At this time, the air pressure in the valve reaches the threshold. When the air pressure is less than the threshold, the air pressure cannot push the spring to compress to the limit. The spring can adaptively push the valve core to make the air pressure in the valve and the air pressure in the outlet pipeline more stable.

[0021] As an example of implementation, the first air inlet 4 and the second air inlet 5 are rectangular, with the same length. The distance between the top of the first air inlet 4 and the top of the valve body 2 is greater than the distance between the second air inlet 5 and the top of the valve core 3. When the valve core 3 slides to the top of the valve body 2, the first air inlet 4 and the second air inlet 5 coincide; at this time, the limiting plate 10 is located at the top inside the valve body 2, and the return spring 11 is compressed to its minimum stroke; at this time, the air intake is at its maximum.

[0022] As an example of implementation, the distance between the bottom of the first air inlet 4 and the bottom of the valve body 2 is greater than the distance between the top of the second air inlet 5 and the bottom of the valve core 3. In this case, the valve core is completely enclosed by the sealing layer 6, improving the overall sealing performance of the valve body. A limiting ring 12 is provided at the bottom of the inner wall of the valve body 2, and the inner diameter of the limiting ring 12 is smaller than the inner diameter of the valve core 3.

[0023] As an example of implementation, a sealing layer 6 is provided on the inner wall of the valve body 2; the outer wall side surface of the valve core 3 abuts against the sealing layer 6.

Claims

1. A natural gas transmission flow regulating device, comprising a valve housing (1), wherein the bottom of the valve housing (1) is an air inlet, and a plurality of air outlets are provided on the side surface of the valve housing (1), characterized in that, The valve housing (1) is provided with a valve body (2) and a valve core (3). The valve body (2) is sleeved on the outside of the valve core (3). The valve body (2) has a plurality of first air inlets (4) radially arranged on its side wall. The valve core (3) has a plurality of second air inlets (5) axially arranged on its side wall. The first air inlets (4) are evenly distributed in the middle of the side surface of the valve body (2), and the second air inlets (5) are evenly distributed in the middle of the side surface of the valve core (3). The bottom of the valve core (3) is connected to the valve core (3). The air inlet is connected; a lead screw (7) is provided on the top of the valve core (3), and a sealing ring (8) is provided between the center of the valve core (3) and the center of the valve body (2) and the lead screw (7), respectively. The lead screw (7) passes through the valve shell (1) and is connected to a driving device; a bolt (9) is provided on the lead screw (7), and a limit plate (10) is fixedly connected to the outer ring of the bolt (9). A return spring (11) is fixedly connected between the bottom of the limit plate (10) and the top of the valve core (3).

2. The natural gas transmission flow regulating device according to claim 1, characterized in that, The portion of the lead screw (7) located inside the valve housing (1) is threaded, and the lead screw (7) is sealed to the valve housing (1).

3. The natural gas transmission flow regulating device according to claim 1, characterized in that, The first air inlet (4) and the second air inlet (5) are rectangular, and the lengths of the first air inlet (4) and the second air inlet (5) are the same. The distance between the top of the first air inlet (4) and the top of the valve body (2) is greater than the distance between the second air inlet (5) and the top of the valve core (3).

4. A natural gas transmission flow regulating device according to claim 2, characterized in that, The distance between the bottom of the first air inlet (4) and the bottom of the valve body (2) is greater than the distance between the top of the second air inlet (5) and the bottom of the valve core (3).

5. A natural gas transmission flow regulating device according to claim 4, characterized in that, A limiting ring (12) is provided at the bottom of the inner wall of the valve body (2), and the inner diameter of the limiting ring (12) is smaller than the inner diameter of the valve core (3).

6. A natural gas transmission flow regulating device according to claim 1, characterized in that, The drive device includes a motor located at the end of the lead screw (7) away from the valve body (1).

7. A natural gas transmission flow regulating device according to claim 1, characterized in that, A sealing layer (6) is provided on the inner wall of the valve body (2); the outer wall side surface of the valve core (3) abuts against the sealing layer (6).

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