Control pipeline of natural gas substation compressor

Abstract

The utility model discloses a control pipeline of a natural gas substation compressor, which comprises a compressor body and a control pipeline communicated with a gas inlet, a medium-pressure gas outlet and a high-pressure gas outlet of the compressor body, and communicating pipes are arranged at the gas inlet, the medium-pressure gas outlet and the high-pressure gas outlet of the compressor body. The control pipeline comprises an air inlet pipe, a medium-pressure air outlet pipe and a high-pressure air outlet pipe which are respectively communicated with an air inlet, a medium-pressure air outlet and a high-pressure air outlet of the compressor body through communicating pipes; through cooperation of the compressor body, the communicating pipe, the gas inlet pipe, the medium-pressure gas outlet pipe, the high-pressure gas outlet pipe, the sealing bearing, the flow equalizing plate, the holes and the driving assembly, when natural gas enters the natural gas compressor body through the gas inlet pipe and the communicating pipe, the flow velocity and pressure distribution of the natural gas are more uniform, and stable operation and efficient compression of the compressor are facilitated; and the heat exchange efficiency of the compressed natural gas subsequently entering the heat exchanger for cooling is improved.

Description

Technical Field

[0001] The utility model relates to a control pipeline, in particular to a control pipeline for a compressor in a natural gas sub-station. Background Art

[0002] In the construction and operation of natural gas sub-stations, as a core device, the performance and stability of compressors are directly related to the reliability and efficiency of natural gas supply.

[0003] When traditional control pipelines handle natural gas from tank trucks, due to the instability of the gas filling volume of tank trucks, the gas pressure entering the compressor fluctuates greatly. Such pressure fluctuations not only increase the operating load of the compressor, but may also cause unnecessary wear to its internal components, affecting the service life. At the same time, the gas compressed by the compressor itself also has instability in temperature and pressure, thus affecting the heat exchange efficiency when the compressed gas enters the heat exchanger for cooling. Summary of the Utility Model

[0004] To solve the defects in the prior art that when handling natural gas from tank trucks, due to the instability of the gas filling volume of tank trucks, the gas pressure entering the compressor fluctuates greatly. Such pressure fluctuations not only increase the operating load of the compressor, but may also cause unnecessary wear to its internal components, affecting the service life. At the same time, the gas compressed by the compressor itself also has instability in temperature and pressure, thus affecting the heat exchange efficiency when the compressed gas enters the heat exchanger for cooling, the utility model provides a control pipeline for a compressor in a natural gas sub-station.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A control pipeline for a compressor in a natural gas sub-station of the utility model includes a compressor body and a control pipeline that is connected to the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body. Connecting pipes are provided at the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body;

[0007] The control pipeline includes an intake pipe, a medium-pressure outlet pipe, and a high-pressure outlet pipe that are respectively connected to the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body through connecting pipes;

[0008] Sealing bearings are fixedly connected to both sides of the inner side wall of the connecting pipe. A flow equalizing plate is rotatably connected to the inner side wall of the connecting pipe through the sealing bearings. The surface of the flow equalizing plate is evenly provided with holes. A driving component for driving the flow equalizing plate to rotate is provided on one side of the outer side wall of the connecting pipe.

[0009] As a preferred technical solution of the present utility model, the driving assembly includes a gear ring fixedly connected to the outer side wall of the flow equalizing plate and a motor fixedly connected to the outer side wall of the communication pipe. The output end of the motor penetrates through the communication pipe and is connected with a gear adapted to the gear ring.

[0010] As a preferred technical solution of the present utility model, a temporary gas storage tank is provided at one end of the air inlet pipe away from the communication pipe. The air outlet of the temporary gas storage tank is communicated with the air inlet pipe, and an air inlet valve is provided at the connection between the temporary gas storage tank and the air inlet pipe.

[0011] As a preferred technical solution of the present utility model, a pressure gauge for measuring the internal gas pressure of the temporary gas storage tank is provided on the temporary gas storage tank.

[0012] As a preferred technical solution of the present utility model, a bypass pipeline is provided between the temporary gas storage tank and the medium-pressure outlet pipe, and a bypass solenoid valve is provided on the bypass pipeline.

[0013] As a preferred technical solution of the present utility model, a flow guiding plate arranged along the bending direction is provided at the bent portion in the bypass pipeline.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. For the control pipeline of this natural gas sub-station compressor, through the cooperation of the compressor body, the communication pipe, the air inlet pipe, the medium-pressure outlet pipe, the high-pressure outlet pipe, the sealing bearing, the flow equalizing plate, the holes, and the driving assembly, the temperature, pressure, and flow rate of the natural gas passing through the holes on the surface of the flow equalizing plate are made more uniform. Furthermore, when the natural gas enters the natural gas compressor body through the air inlet pipe and the communication pipe, its flow rate and pressure distribution are more uniform, which is beneficial to the stable operation and efficient compression of the compressor. When the natural gas compression is completed and discharged through the medium-pressure outlet pipe and the high-pressure outlet pipe, the heat exchange efficiency of the compressed natural gas for subsequent cooling in the heat exchanger increases;

[0016] 2. For the control pipeline of this natural gas sub-station compressor, through the cooperation of the temporary gas storage tank, the air inlet valve, and the pressure gauge, when the tanker fills the inside of the compressor body with gas, the natural gas first enters the temporary gas storage tank. The temporary gas storage tank can buffer and absorb the possible unstable pressure fluctuations of the air flow, and the pressure inside the temporary gas storage tank continuously rises. When the pressure inside the temporary gas storage tank reaches the predetermined value, the air inlet valve is opened, and the gas in the temporary gas storage tank uniformly enters the compressor body through the air inlet valve and the air inlet pipe for compression. Thus, the stability of the air intake volume of the compressor body is ensured when the tanker adds natural gas, and the large pressure difference of the compressed gas caused by the unstable air intake volume is avoided. Description of the Drawings

[0017] The accompanying drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the accompanying drawings:

[0018] Figure 1 is a three-dimensional structural schematic diagram of a control pipeline of a natural gas sub-station compressor of the present utility model;

[0019] Figure 2 is a side-view structural schematic diagram of a control pipeline of a natural gas sub-station compressor of the present utility model;

[0020] Figure 3 is a Figure 2 magnified schematic diagram of the structure at A in the control pipeline of a natural gas sub-station compressor of the present utility model.

[0021] In the figure: 1, compressor body; 2, connecting pipe; 3, intake pipe; 4, medium-pressure outlet pipe; 5, high-pressure outlet pipe; 6, sealing bearing; 7, flow equalizing plate; 8, holes; 9, toothed ring; 10, motor; 11, gear; 12, temporary gas storage tank; 13, intake valve; 14, pressure gauge; 15, bypass pipeline; 16, bypass solenoid valve; 17, deflector plate. Specific embodiments

[0022] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0023] Referring to Figure 1 、 Figure 2 and Figure 3 , a control pipeline of a natural gas sub-station compressor of the present utility model includes a compressor body 1 and a control pipeline that is connected to the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body 1. Connecting pipes 2 are provided at the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body 1;

[0024] Referring to Figure 1 、 Figure 2 and Figure 3 , the control pipeline includes an intake pipe 3, a medium-pressure outlet pipe 4, and a high-pressure outlet pipe 5 that are respectively connected to the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body 1 through the connecting pipe 2. During use, natural gas enters the compressor body 1 through the intake pipe 3 for compression, the compressed medium-pressure natural gas is discharged from the compressor body 1 through the medium-pressure outlet pipe 4, and the compressed high-pressure natural gas is discharged from the compressor body 1 through the high-pressure outlet pipe 5;

[0025] Referring to Figure 1 、 Figure 2 and Figure 3, one end of the intake pipe 3 far from the connecting pipe 2 is provided with a temporary gas storage tank 12. A pressure gauge 14 for measuring the internal gas pressure of the temporary gas storage tank 12 is arranged on the temporary gas storage tank 12. The air inlet of the temporary gas storage tank 12 is communicated with the tank truck. When the tank truck fills the inside of the compressor body 1 with gas, natural gas first enters the temporary gas storage tank 12. The pressure inside the temporary gas storage tank 12 continuously rises. During this process, the pressure inside the temporary gas storage tank 12 can be observed through the pressure gauge 14. The air outlet of the temporary gas storage tank 12 is communicated with the intake pipe 3, and an intake valve 13 is arranged at the connection between the temporary gas storage tank 12 and the intake pipe 3. When the pressure inside the temporary gas storage tank 12 reaches a predetermined value, the intake valve 13 is opened, and the gas inside the temporary gas storage tank 12 uniformly enters the compressor body 1 through the intake valve 13 and the intake pipe 3 for compression;

[0026] Refer to Figure 1 , Figure 2 and Figure 3 , on both sides of the inner side wall of the connecting pipe 2, sealing bearings 6 are fixedly connected. The inner side wall of the connecting pipe 2 is rotatably connected with a flow equalizing plate 7 through the sealing bearings 6. The surface of the flow equalizing plate 7 is uniformly provided with holes 8. One side of the outer side wall of the connecting pipe 2 is provided with a driving component for driving the flow equalizing plate 7 to rotate. The driving component includes a gear ring 9 fixedly connected to the outer side wall of the flow equalizing plate 7 and a motor 10 fixedly connected to the outer side wall of the connecting pipe 2. The output end of the motor 10 penetrates through the connecting pipe 2 and is connected with a gear 11 adapted to the gear ring 9. After natural gas enters the connecting pipe 2 through the intake pipe 3, the motor 10 drives the gear 11 to rotate, and then drives the flow equalizing plate 7 to rotate through the gear ring 9. After the natural gas passes through the holes on the flow equalizing plate 7, its flow rate and pressure distribution are more uniform, which is beneficial to the stable operation and efficient compression of the compressor;

[0027] Refer to Figure 1 , Figure 2 and Figure 3 , when the compressed natural gas is discharged through the medium-pressure outlet pipe 4 and the high-pressure outlet pipe 5, after entering the connecting pipe 2, its flow rate and pressure distribution are also more uniform after passing through the holes on the rotating flow equalizing plate 7. At the same time, the temperature distribution of the natural gas in the pipeline is also more uniform. Furthermore, the heat exchange efficiency of the compressed natural gas entering the heat exchanger for cooling subsequently can be improved as much as possible. At the same time, ensuring the stability of the pressure of the natural gas in the pipeline and inside the compressor body 1 can avoid the impact and eddy current phenomena of the air flow in the pipeline and inside the compressor body 1 as much as possible, and thus improve the service life of the pipeline and the compressor body 1 as much as possible;

[0028] Refer to Figure 1 , Figure 2 and Figure 3A bypass pipeline 15 is provided between the temporary gas storage tank 12 and the medium-pressure gas outlet pipe 4. A bypass solenoid valve 16 is provided on the bypass pipeline 15. A guide plate 17 arranged along the bending direction is provided at the bend in the bypass pipeline 15. If the tank truck adds a small amount of gas, resulting in a low pressure of the compressed natural gas, the bypass solenoid valve 16 is opened, and the medium-pressure natural gas discharged from the medium-pressure gas outlet pipe 4 can re-enter the temporary gas storage tank 12, and then re-mix with the low-pressure gas in the temporary gas storage tank 12, and then re-enter the compressor body 1 through the air inlet pipe 3 and the connecting pipe 2 for compression, thereby increasing the overall pressure of the compressed natural gas.

[0029] The working principle of the utility model is as follows: the air inlet of the temporary gas storage tank 12 is connected to the tank truck. When the tank truck refills the interior of the compressor body 1, the natural gas first enters the temporary gas storage tank 12, and the pressure in the temporary gas storage tank 12 continues to rise. During this process, the pressure in the temporary gas storage tank 12 can be observed by the pressure gauge 14. When the pressure in the temporary gas storage tank 12 reaches a predetermined value, the air inlet valve 13 is opened, and the gas in the temporary gas storage tank 12 evenly enters the compressor body 1 through the air inlet valve 13 and the air inlet pipe 3 for compression. The compressed medium-pressure natural gas is discharged from the compressor body 1 through the medium-pressure outlet pipe 4, and the compressed high-pressure natural gas is discharged from the compressor body 1 through the high-pressure outlet pipe 5.

[0030] After the natural gas enters the connecting pipe 2 through the intake pipe 3, the motor 10 drives the gear 11 to rotate, and then drives the equalizer plate 7 to rotate through the gear ring 9. After the natural gas passes through the holes on the equalizer plate 7, its flow rate and pressure distribution are more uniform, which is conducive to the stable operation and efficient compression of the compressor;

[0031] When the natural gas is compressed and discharged through the medium-pressure outlet pipe 4 and the high-pressure outlet pipe 5, after entering the connecting pipe 2, the flow velocity and pressure distribution are more uniform after passing through the holes on the rotating flow equalizing plate 7. At the same time, the temperature distribution of the natural gas in the pipeline is also more uniform, thereby maximizing the heat exchange efficiency of the compressed natural gas when it enters the heat exchanger for cooling. At the same time, ensuring the stability of the natural gas pressure in the pipeline and the compressor body 1 can minimize the impact and vortex of the airflow in the pipeline and the compressor body 1, thereby maximizing the service life of the pipeline and the compressor body 1.

[0032] If the tank truck adds a small amount of gas, resulting in a low pressure of the compressed natural gas, the bypass solenoid valve 16 is opened, and the medium-pressure natural gas discharged from the medium-pressure outlet pipe 4 can re-enter the temporary gas storage tank 12, and then re-mix with the low-pressure gas in the temporary gas storage tank 12, and then re-enter the compressor body 1 through the intake pipe 3 and the connecting pipe 2 to be compressed, thereby increasing the overall pressure of the compressed natural gas.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A control pipeline for a natural gas sub-station compressor, comprising a compressor body (1) and a control pipeline that is connected to the intake port, medium-pressure outlet port, and high-pressure outlet port of the compressor body (1). It is characterized in that: Communication pipes (2) are provided at the air inlet, medium-pressure air outlet, and high-pressure air outlet of the compressor body (1). The control pipeline includes an intake pipe (3), a medium-pressure outlet pipe (4), and a high-pressure outlet pipe (5) that are respectively connected to the air inlet, medium-pressure air outlet, and high-pressure air outlet of the compressor body (1) through the communication pipe (2). Sealing bearings (6) are fixedly connected to both sides of the inner side wall of the communication pipe (2). A flow equalizing plate (7) is rotatably connected to the inner side wall of the communication pipe (2) through the sealing bearings (6). Holes (8) are evenly formed on the surface of the flow equalizing plate (7). A driving assembly for driving the rotation of the flow equalizing plate (7) is arranged on one side of the outer side wall of the communication pipe (2).

2. The control pipeline of a natural gas sub-station compressor according to claim 1, characterized in that, The driving assembly includes a toothed ring (9) fixedly connected to the outer side wall of the flow equalizing plate (7) and a motor (10) fixedly connected to the outer side wall of the communication pipe (2). The output end of the motor (10) penetrates through the communication pipe (2) and is connected to a gear (11) adapted to the toothed ring (9).

3. The control pipeline of a natural gas sub-station compressor according to claim 2, characterized in that, A temporary gas storage tank (12) is arranged at the end of the intake pipe (3) far from the communication pipe (2). The air outlet of the temporary gas storage tank (12) is communicated with the intake pipe (3), and an intake valve (13) is arranged at the connection between the temporary gas storage tank (12) and the intake pipe (3).

4. The control pipeline of a natural gas sub-station compressor according to claim 3, characterized in that A pressure gauge (14) for measuring the internal gas pressure of the temporary gas storage tank (12) is arranged on the temporary gas storage tank (12).

5. The control pipeline of a natural gas sub-station compressor according to claim 4, characterized in that, A bypass pipeline (15) is arranged between the temporary gas storage tank (12) and the medium-pressure outlet pipe (4), and a bypass solenoid valve (16) is arranged on the bypass pipeline (15).

6. The control pipeline of a natural gas sub-station compressor according to claim 5, characterized in that, A flow guide plate (17) arranged along the bending direction is arranged at the bent part in the bypass pipeline (15).

Images