Diaphragm compressor no-load waiting state control system

Abstract

The invention discloses a diaphragm compressor no-load waiting state control system, and relates to the technical field of diaphragm compressors, the system comprises an air inlet pipeline I, the air inlet pipeline I is connected with the air inlet end of an air inlet buffer tank, and the air outlet end of the air inlet buffer tank is connected with the air inlet end of a compressor body through an air inlet pipeline II; interstage pipelines are arranged between all stages of air cavities of the compressor body, a left oil overflow pipeline and a right oil overflow pipeline are arranged on the compressor body, the air outlet end of the compressor body is connected with the air inlet end of the second-stage cooler through a first air outlet pipeline, and the air outlet end of the second-stage cooler is connected with a second air outlet pipeline. And the gas outlet pipeline II is connected with the emptying pipeline and the gas exhaust pipeline. The remote transmission pressure gauge on the exhaust pipeline is matched with the PLC, so that a no-load waiting mode can be automatically switched after vehicle filling is completed, next filling can be prepared without shutdown, the single vehicle filling period is greatly shortened, the vehicle waiting time is shortened, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm compressors, in particular to a diaphragm compressor no-load waiting state control system. Background Art

[0002] As a gas equipment that boosts the intake air pressure and then discharges it, the diaphragm compressor plays an indispensable role in many industries such as energy and chemical industry, gas filling, food and medicine, and hydrogen refueling stations. Its core function is to compress the intake air source and increase the gas pressure to meet the specific needs of different industrial fields.

[0003] Before starting the diaphragm compressor, light load preparation is required. First, open the vent / oil line / return valve to unload the internal energy, and close the inlet / exhaust valve. After the main engine is started, close the oil line and return valve, and then open the inlet / exhaust valve to complete the startup. When shutting down, first close the inlet / exhaust valve, then open the oil line and air line valves to exhaust the residual energy, and finally stop the cylinder head piston movement.

[0004] When the hydrogen transport tube bundle vehicle is filled, it is necessary to first stop the equipment in the control room, then remove the gas line connector connecting the transport tube bundle vehicle, and then install it on the next tube bundle vehicle to be filled.

[0005] However, in the current hydrogen transport tube bundle vehicle (hydrogen torpedo vehicle) filling process, there are some problems with the application of diaphragm compressors. Specifically, firstly, the start-up and stop of the equipment and the replacement of the gas line joints increase the time consumption of single vehicle filling, the queue of vehicles is backlogged, and the overall filling efficiency is low; secondly, frequent start-up and stop increase the wear of equipment, accelerate aging, increase the failure rate, increase maintenance costs and downtime; finally, personnel need to monitor on site when starting, which increases the workload, potential risk of operational errors, and increases the complexity of management.

[0006] Based on this, a diaphragm compressor no-load waiting state control system is now provided, which can eliminate the disadvantages of the existing system. Summary of the invention

[0007] The object of the present invention is to provide a diaphragm compressor no-load waiting state control system to solve the problems of long filling cycle and high failure risk in the background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A diaphragm compressor no-load waiting state control system comprises an air intake pipeline 1, wherein the air intake pipeline 1 is connected to the air intake end of an air intake buffer tank, the air outlet end of the air intake buffer tank is connected to the air intake end of a compressor body through an air intake pipeline 2, inter-stage pipelines are arranged between the air cavities of each stage of the compressor body, a left oil overflow pipeline and a right oil overflow pipeline are respectively arranged on the compressor body, the air outlet end of the compressor body is connected to the air intake end of a secondary cooler through an air outlet pipeline 1, the air outlet end of the secondary cooler is connected to an air outlet pipeline 2, the air outlet pipeline 2 is connected to a venting pipeline and an exhaust pipeline, and the exhaust port of the exhaust pipeline is connected to an external vehicle to be charged.

[0010] Preferably, a primary cooler and a primary buffer tank are installed on the interstage pipeline.

[0011] Preferably, an intake valve is provided on the second intake pipeline, a left oil circuit valve and a right oil circuit valve are provided on the left oil overflow pipeline and the right oil overflow pipeline respectively, a vent valve and an exhaust valve are provided on the vent pipeline and the exhaust pipeline respectively, and a remote pressure gauge is installed on the exhaust pipeline, the first outlet pipeline is connected to the second intake pipeline through a return pipeline, a return valve is provided on the return pipeline, and a pressure detection unit is provided on the compressor body.

[0012] Preferably, the pressure detection unit and the remote pressure gauge are connected to the PLC controller through a signal line, and the intake valve, left oil circuit valve, right oil circuit valve, reflux valve, vent valve, and exhaust valve are all connected to the PLC controller and are fully automatically controlled by the PLC control program.

[0013] Preferably, the pressure setting value of the pressure detection unit is less than 0.5 MPa.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention cooperates with the PLC controller through the remote pressure gauge on the exhaust pipeline, so that the vehicle can automatically enter the no-load waiting mode after the vehicle is filled, and can prepare for the next filling without stopping, thereby greatly shortening the single vehicle filling cycle, reducing the vehicle waiting time and improving efficiency.

[0016] 2. The present invention cooperates with the pressure detection unit and various valves through the PLC controller, thereby reducing the number of starts and stops of the compressor body, reducing the risk of failure that may occur in the compressor body during the start and stop process, and can also reduce the number of times operators start the machine on site, thereby improving their work efficiency. This not only extends the service life of the compressor body, but also reduces the downtime and maintenance costs caused by failures, thereby improving the stability and reliability of the compressor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the compressor body of the present invention.

[0019] Notes on the accompanying drawings: 1. Intake pipeline one; 11. Intake buffer tank; 12. Intake pipeline two; 13. Intake valve; 14. Compressor body; 141. Pressure detection unit; 15. Left oil circuit valve; 16. Right oil circuit valve; 17. Interstage pipeline; 18. Primary cooler; 19. Primary buffer tank; 20. Outlet pipeline one; 21. Return pipeline; 22. Return valve; 23. Secondary cooler; 24. Vent pipeline; 25. Vent valve; 26. Exhaust pipeline; 27. Exhaust valve; 28. Outlet pipeline two. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] In one embodiment, Figure 1-Figure 2 As shown, a diaphragm compressor no-load waiting state control system includes an air intake pipeline 1, wherein the air intake pipeline 1 is connected to the air intake end of the air intake buffer tank 11, and the air outlet end of the air intake buffer tank 11 is connected to the air intake end of the compressor body 14 through an air intake pipeline 2 12, and inter-stage pipelines 17 are arranged between the air cavities of each stage of the compressor body 14, and the compressor body 14 is respectively provided with a left oil overflow pipeline and a right oil overflow pipeline, and the air outlet end of the compressor body 14 is connected to the air intake end of the secondary cooler 23 through an air outlet pipeline 20, and the air outlet end of the secondary cooler 23 is connected to an air outlet pipeline 2 28, and the air outlet pipeline 28 is connected to a venting pipeline 24 and an exhaust pipeline 26, and the exhaust port of the exhaust pipeline 26 is connected to an external vehicle to be charged.

[0022] In this embodiment, the air intake buffer tank 11 is used to buffer and stabilize the airflow entering the compressor body 14; the secondary cooler 23 cools the compressed gas to ensure that its temperature and pressure meet the subsequent use requirements.

[0023] In an optional embodiment, a primary cooler 18 and a primary buffer tank 19 are installed on the inter-stage pipeline 17 .

[0024] It should be noted that a first-stage cooler 18 and a first-stage buffer tank 19 are installed on the interstage pipeline. This helps to further reduce the temperature and stabilize the gas flow before the gas enters the next stage of compression, thereby improving the compression efficiency and the reliability of the compressor.

[0025] In an optional embodiment, an intake valve 13 is provided on the intake pipeline 2 12, a left oil circuit valve 15 and a right oil circuit valve 16 are provided on the left oil overflow pipeline and the right oil overflow pipeline respectively, a vent valve 25 and an exhaust valve 27 are provided on the vent pipeline 24 and the exhaust pipeline 26 respectively, and a remote pressure gauge is installed on the exhaust pipeline 26, the outlet pipeline 1 20 is connected to the intake pipeline 2 12 through a return pipeline 21, a return valve 22 is provided on the return pipeline 21, and a pressure detection unit 141 is provided on the compressor body 14.

[0026] It should be noted that an intake valve 13 is provided on the intake pipe 12 for controlling the entry of airflow; a left oil circuit valve 15 and a right oil circuit valve 16 are provided on the left oil overflow pipe and the right oil overflow pipe respectively for controlling the discharge of lubricating oil; a vent valve 25 and an exhaust valve 27 are provided on the vent pipe 24 and the exhaust pipe 26 respectively for controlling the discharge of gas; the outlet pipe 1 20 is connected to the intake pipe 12 through a reflux pipe 21, and a reflux valve 22 is provided, which allows part of the gas to flow back to the intake pipe 2 when necessary to adjust the pressure and temperature in the system.

[0027] A pressure detection unit is provided on the compressor body to monitor the pressure inside the compressor in real time.

[0028] In an optional embodiment, the pressure detection unit 141 and the remote pressure gauge are connected to the PLC controller through a signal line, and the intake valve 13, the left oil circuit valve 15, the right oil circuit valve 16, the reflux valve 22, the vent valve 25 and the exhaust valve 27 are all connected to the PLC controller and are fully automatically controlled by the PLC control program.

[0029] It should be noted that the remote pressure gauge and pressure detection unit 141 feed back the real-time value to the PLC controller for calculation and logic to control the field device. All valves are connected to the PLC controller and fully automatically controlled by the PLC control program. This improves the automation level of the system and ensures the stable operation and efficient management of the system.

[0030] In an optional embodiment, the pressure setting value of the pressure detection unit 141 is less than 0.5 MPa.

[0031] It should be noted that the pressure setting value of the pressure detection unit 141 is less than 0.5 MPa. This means that when the pressure inside the compressor body 14 exceeds 0.5 MPa, the PLC control program will take corresponding measures, such as closing the vent valve 25 to ensure a slight positive pressure inside the compressor body 14 to prevent the vent valve 25 from being opened for too long, which may cause the risk of other gases entering the compressor body 14 and affect the purity of the process gas.

[0032] The above embodiment discloses a diaphragm compressor no-load waiting state control system, wherein first, the compressor body 14 starts and runs normally to inflate the vehicle, and the real-time value of the remote pressure gauge on the exhaust pipe 26 is fed back to the PLC controller for calculation and logic control of the field equipment action, and when the vehicle charging pressure reaches the set value, the PLC controller will execute the non-stop program, but turn to the no-load waiting program to run no-load, and the compressor body 14 will not stop, waiting for the next charging command to charge again, and the cycle will work;

[0033] The steps of running the no-load waiting mode are: when the charging vehicle is full, close the intake valve 13 and the exhaust valve 27, open the vent valve 25 and open the return valve 22 and the oil circuit valve (left oil circuit valve 15 and right oil circuit valve 16) at the same time, and when the pressure detection unit 141 detects that the residual gas pressure inside the compressor body 14 is less than 0.5 MPa, the pressure detection unit 141 will transmit this information to the PLC controller, and the PLC controller will close the vent valve 25 (to ensure the slight positive pressure inside the compressor body 14 to prevent the vent valve 25 from being opened for too long, and there is a risk of other gases entering the compressor body 14, affecting the purity of the process gas), forming a no-load waiting mode; when the inflation command is received again, immediately close the oil circuit valve (left oil circuit valve 15 and right oil circuit valve 16) to prepare for the oil replenishment of the cylinder head of the compressor body 14, and close the return valve 22 and open the intake valve 13 and the exhaust valve 27 after five seconds to prepare for inflation, until the vehicle is full for the next cycle.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A diaphragm compressor no-load waiting state control system, characterized in that: The invention comprises an air intake pipeline (1), wherein the air intake pipeline (1) is connected to the air intake end of an air intake buffer tank (11), the air outlet end of the air intake buffer tank (11) is connected to the air intake end of a compressor body (14) through an air intake pipeline (12), an interstage pipeline (17) is arranged between the air cavities of each stage of the compressor body (14), a left oil overflow pipeline and a right oil overflow pipeline are arranged on the compressor body (14), the air outlet end of the compressor body (14) is connected to the air intake end of a secondary cooler (23) through an air outlet pipeline (20), the air outlet end of the secondary cooler (23) is connected to an air outlet pipeline (28), the air outlet pipeline (28) is connected to a venting pipeline (24) and an exhaust pipeline (26), and the exhaust port of the exhaust pipeline (26) is connected to an external vehicle to be charged.

2. A diaphragm compressor no-load waiting state control system according to claim 1, characterized in that: A primary cooler (18) and a primary buffer tank (19) are installed on the inter-stage pipeline (17).

3. A diaphragm compressor no-load waiting state control system according to claim 1, characterized in that: The second intake pipeline (12) is provided with an intake valve (13), the left oil overflow pipeline and the right oil overflow pipeline are respectively provided with a left oil circuit valve (15) and a right oil circuit valve (16), the vent pipeline (24) and the exhaust pipeline (26) are respectively provided with a vent valve (25) and an exhaust valve (27), and the exhaust pipeline (26) is installed with a remote pressure gauge, the first outlet pipeline (20) is connected to the second intake pipeline (12) through a return pipeline (21), the return pipeline (21) is provided with a return valve (22), and the compressor body (14) is provided with a pressure detection unit (141).

4. A diaphragm compressor no-load waiting state control system according to claim 3, characterized in that: The pressure detection unit (141) and the remote pressure gauge are connected to the PLC controller via a signal line, and the intake valve (13), the left oil circuit valve (15), the right oil circuit valve (16), the return valve (22), the vent valve (25), and the exhaust valve (27) are all connected to the PLC controller and are fully automatically controlled by the PLC control program.

5. A diaphragm compressor no-load waiting state control system according to claim 3, characterized in that: The pressure setting value of the pressure detection unit (141) is less than 0.5 MPa.

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