Air compressor blowdown and backflush device

Abstract

The utility model provides an air compressor sewage discharge and back-blowing device, including: an air compressor, a first sewage discharge pipeline, a liquid level sensor, a drain solenoid valve, a time-controlled solenoid valve, and a second sewage discharge pipeline. The first sewage discharge pipeline and the liquid level sensor are connected to the air compressor, the drain solenoid valve is installed on the first sewage discharge pipeline, and the two ends of the second sewage discharge pipeline are connected to the two ends of the drain solenoid valve one by one, and the time-controlled solenoid valve is installed on the second sewage discharge pipeline. According to the existing sewage discharge process, it is a signal quantitative sewage discharge mode. In order to ensure that the sewage discharge system still works normally when the signal is interrupted or fails, an additional timed sewage discharge mode is added. By adding a group of solenoid valves, a dual-channel parallel mode of signal control and time control is formed. The time-controlled solenoid valve switches on and off at a fixed time according to the logical instruction. The sewage discharge system is guaranteed to be normal to the greatest extent, and any single equipment failure defect will not directly lead to the failure of the sewage discharge function. By optimizing the process flow, the stable operation of the unit sewage discharge system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a sewage discharge and back-blowing device for air compressors. Background Art

[0002] The core equipment of the natural gas pipeline compressor station is the compressor unit, which is the heart of the long-distance pipeline and provides a continuous source of power for natural gas transportation. The isolation gas during the operation of the unit and the power source of the pneumatic actuators all rely on compressed air. As an important auxiliary equipment of the compressor unit, the air compressor compresses the external air, and after filtering, pressurizing, drying and storing, it provides instrument air for the compressor unit to ensure the normal operation of the compressor unit. The compressor station uses a matching air compressor unit, usually a screw air compressor, and the operation mode is one main and one standby.

[0003] When the air compressor unit in operation stops due to a fault, it will directly lead to a decrease in air pressure, and the compressor unit will be interlocked and shut down. The main factors causing the air compressor to stop due to a fault are: ① air compressor body defects; ② inverter failure; ③ power supply failure; ④ lubricating oil system defects;

[0004] In order to avoid the air compressor unit from shutting down due to failure during operation, the air compressor operating status must be inspected daily and the air compressor unit must be maintained regularly. However, there are still problems such as air compressor body defects and lubricating oil system defects that cannot be discovered in time, resulting in unit failure and shutdown.

[0005] The main problems currently exist:

[0006] 1. The air compressor unit is equipped with a sewage discharge device for the intercooler and aftercooler, and its main components are: a moisture collector and a steam trap solenoid valve; the main working mode is: the condensed water generated by the compressed air enters the moisture collector, and when the liquid level alarm signal is reached, the steam trap solenoid valve is turned on to discharge the condensed water into the sewage discharge system.

[0007] However, when the solenoid valve or sensor fails, the operating personnel cannot discover it immediately. The long-term accumulation of liquid dirt in the intercooler or aftercooler will cause a large amount of liquid in the instrument air duct, which may even seriously affect the lubricating oil system, causing problems such as water emulsification of the lubricating oil, resulting in reduced operating stability of the air compressor.

[0008] 2. The air compressor unit is equipped with a back-blowing device for the oil breather and high-pressure rotor. Its main components are: filter pressure reducing device, solenoid valve, and one-way valve; the main working method is: the gas at the unit outlet passes through the post-filter and the filter pressure regulating device to enter the oil breather for back-blowing. At the same time, when the unit is shut down, it enters the high-pressure rotor for back-blowing to prevent the positive and negative screws in the rotor from sticking.

[0009] However, if there is water in the high-pressure rotor, if the one-way valve and the solenoid valve fail, there will be gas backflow, and the liquid-containing gas will come into contact and mix with the lubricating oil through the oil breather, causing the lubricating oil to contain water, the unit to fail and shut down, and the compressor unit to operate unstable. Utility Model Content

[0010] The technical problem to be solved by the utility model is to provide a sewage discharge and back-blowing device for an air compressor in view of the deficiencies in the prior art.

[0011] The utility model provides a technical solution to the above technical problems as follows: an air compressor sewage discharge and back-blowing device, comprising: an air compressor, a first sewage discharge pipeline, a liquid level sensor, a drain solenoid valve, a time-controlled solenoid valve, and a second sewage discharge pipeline, wherein the first sewage discharge pipeline and the liquid level sensor are both connected to the air compressor, the drain solenoid valve is installed on the first sewage discharge pipeline, the two ends of the second sewage discharge pipeline are connected to the two ends of the drain solenoid valve in a one-to-one correspondence, and the time-controlled solenoid valve is installed on the second sewage discharge pipeline; the air compressor is provided with a post-filter, a first filter pressure regulating device, a second filter pressure regulating device, an oil breather, and a high-pressure rotor, the high-pressure rotor is connected to the post-filter through a first pipeline, the first filter pressure regulating device is installed on the first pipeline, the oil breather is connected to the post-filter through a second pipeline, and the second filter pressure regulating device is installed on the second pipeline.

[0012] The beneficial effects of the technical solution of the utility model are as follows: according to the existing sewage discharge process, it is a signal quantitative sewage discharge mode. In order to ensure that the sewage discharge system still works normally when the signal is interrupted or fails, an additional timed sewage discharge mode is added. By adding a set of solenoid valves, a dual-channel parallel mode of signal control and time control is formed. The time-controlled solenoid valve switches on and off at a fixed time according to the logical instruction. The sewage discharge system is guaranteed to be normal to the greatest extent, and any single equipment failure defect will not directly lead to the failure of the sewage discharge function. By optimizing the process flow, the stable operation of the unit sewage discharge system is achieved. In order to eliminate the instability during operation, the series structure is transformed into a parallel structure, the original back-blowing gas is kept entering the oil respirator channel, and the gas path to the high-pressure rotor is cut off. At the same time, a group of filter regulators are added from the post-filter to supply the high-pressure rotor with back-blowing separately, thereby effectively isolating the channel connection between the high-pressure rotor and the oil respirator, and eliminating the risk of water vapor entering the oil respirator.

[0013] Furthermore, an intercooler and an aftercooler are provided in the air compressor, and the first sewage pipe and the liquid level sensor are both connected to the intercooler and the aftercooler.

[0014] The beneficial effect of adopting the above further technical solution is that it is easy to connect the first sewage pipe and the liquid level sensor to the air compressor.

[0015] Furthermore, the intercooler and the aftercooler are connected to a moisture collector, and the first sewage pipe and the liquid level sensor are both connected to the moisture collector.

[0016] The beneficial effect of adopting the above further technical solution is that it is easy to connect the first sewage pipe and the liquid level sensor to the air compressor.

[0017] Furthermore, the liquid level sensor and the drain solenoid valve are both connected to a PLC.

[0018] The beneficial effect of adopting the above further technical solution is: it is easy to realize automatic control through PLC and improve automation.

[0019] Furthermore, the air compressor is provided with a sewage outlet, one end of the first sewage outlet is connected to the sewage outlet, and the other end of the first sewage outlet is connected to a sewage main pipe.

[0020] The beneficial effect of adopting the above further technical solution is that it is convenient to connect the main sewage pipe to the air compressor through the first sewage pipe.

[0021] Furthermore, a first tee is provided on one side of the first sewage pipe adjacent to the air compressor and on one side of the first sewage pipe adjacent to the sewage main pipe, and both ends of the second sewage pipe are connected to the first tee in a one-to-one correspondence.

[0022] The beneficial effect of adopting the above further technical solution is: the provision of the first three-way connection facilitates the connection of the second sewage pipeline with the first sewage pipeline, and facilitates the installation and maintenance of the sewage pipeline.

[0023] Furthermore, a one-way valve is provided on a side of the first sewage discharge pipeline adjacent to the sewage main pipe and a one-way valve is provided on a side of the second sewage discharge pipeline adjacent to the sewage main pipe.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is: an additional sewage discharge pipeline is opened, and its component structure is: a time-controlled solenoid valve and a one-way valve, forming a dual sewage discharge mode of original signal sewage discharge + time-controlled sewage discharge, and any single circuit failure will not directly affect the working stability of the sewage discharge system.

[0025] Furthermore, the time-controlled solenoid valve is switched on and off once every 5 minutes, the opening duration of the time-controlled solenoid valve is 30 seconds each time, and the access voltage of the time-controlled solenoid valve is 220V or 24V.

[0026] The beneficial effect of adopting the above further technical solution is: by setting the opening and closing cycle time and the opening and maintaining time, it is convenient to carry out the sewage discharge work at intervals. By adding a set of solenoid valves, a dual-channel parallel mode of signal control and time control is formed, and the time-controlled solenoid valve switches on and off at a fixed time according to the logical instructions. The sewage discharge system is guaranteed to be normal to the greatest extent, and any single equipment failure will not directly lead to the failure of the sewage discharge function. By optimizing the process flow, the stable operation of the unit sewage discharge system is achieved.

[0027] Furthermore, a solenoid valve is provided on the first pipeline, and the solenoid valve is located between the first filtering and pressure regulating device and the high-pressure rotor.

[0028] The beneficial effect of adopting the above further technical solution is that the provision of the solenoid valve facilitates the opening and closing of the pipeline between the first filtering and pressure regulating device and the high-pressure rotor.

[0029] Furthermore, the post-filter outlet is provided with a second tee, and the first pipeline and the second pipeline are both connected to the second tee.

[0030] The beneficial effects of adopting the above further technical solution are: adding a tee at the outlet of the post-filter, connecting an additional pipeline to the oil breather, and setting a filter pressure regulating device in the middle of the gas circuit. The oil breather and the high-pressure rotor are back-blown separately, and the gas in the high-pressure rotor will not affect the oil breather, thereby improving the operating stability of the unit.

[0031] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is one of the structural schematic diagrams of the air compressor sewage discharge and backflush device provided in an embodiment of the utility model.

[0033] Figure 2 The second structural schematic diagram of the air compressor sewage discharge and back-blowing device provided in the embodiment of the utility model.

[0034] Explanation of the accompanying drawings: 1. First sewage pipeline; 2. Liquid level sensor; 3. Drain solenoid valve; 4. Time-controlled solenoid valve; 5. Second sewage pipeline; 6. Intercooler; 7. Sewage main pipe; 8. Check valve; 9. Post-filter; 10. First filter pressure regulating device; 11. Second filter pressure regulating device; 12. Oil breather; 13. High-pressure rotor; 14. First pipeline; 15. Second pipeline; 16. Solenoid valve. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides an air compressor sewage discharge and back-blowing device, including: an air compressor, a first sewage discharge pipeline 1, a liquid level sensor 2, a drain solenoid valve 3, a time-controlled solenoid valve 4, and a second sewage discharge pipeline 5, wherein the first sewage discharge pipeline 1 and the liquid level sensor 2 are both connected to the air compressor, the drain solenoid valve 3 is installed on the first sewage discharge pipeline 1, and the two ends of the second sewage discharge pipeline 5 are connected to the two ends of the drain solenoid valve 3 in a one-to-one correspondence, and the time-controlled solenoid valve 4 is installed on the second sewage discharge pipeline 5; the air compressor is provided with a post-filter 9, a first filter pressure regulating device 10, a second filter pressure regulating device 11, an oil breather 12, and a high-pressure rotor 13, the high-pressure rotor 13 is connected to the post-filter 9 through a first pipeline 14, the first filter pressure regulating device 10 is installed on the first pipeline 14, the oil breather 12 is connected to the post-filter 9 through a second pipeline 15, and the second filter pressure regulating device 11 is installed on the second pipeline 15.

[0037] The beneficial effects of the technical solution of the utility model are as follows: according to the existing sewage discharge process, it is a signal quantitative sewage discharge mode. In order to ensure that the sewage discharge system still works normally when the signal is interrupted or fails, an additional timed sewage discharge mode is added. By adding a set of solenoid valves, a dual-channel parallel mode of signal control and time control is formed. The time-controlled solenoid valve switches on and off at a fixed time according to the logical instruction. The sewage discharge system is guaranteed to be normal to the greatest extent, and any single equipment failure defect will not directly lead to the failure of the sewage discharge function. By optimizing the process flow, the stable operation of the unit sewage discharge system is achieved. In order to eliminate the instability during operation, the series structure is transformed into a parallel structure, the original back-blowing gas is kept entering the oil respirator channel, and the gas path to the high-pressure rotor is cut off. At the same time, a group of filter regulators are added from the post-filter to supply the high-pressure rotor with back-blowing separately, thereby effectively isolating the channel connection between the high-pressure rotor and the oil respirator, and eliminating the risk of water vapor entering the oil respirator.

[0038] The embodiment of the utility model provides an air compressor blowdown and backflush device, which realizes the stable operation of the blowdown and backflush system of the unit by optimizing the process flow.

[0039] Optimization of sewage discharge system: According to the existing sewage discharge process, a signal quantitative sewage discharge mode is adopted. In order to ensure that the sewage discharge system still works normally when the signal is interrupted or fails, a timed sewage discharge mode is additionally added. By adding a set of solenoid valves, a dual-channel parallel mode of signal control and time control is formed, which ensures the normal operation of the sewage discharge system to the greatest extent. Any single equipment failure defect will not directly lead to the failure of the sewage discharge function.

[0040] Furthermore, an intercooler 6 and an aftercooler are provided in the air compressor, and the first sewage pipe 1 and the liquid level sensor 2 are both connected to the intercooler 6 and the aftercooler.

[0041] The beneficial effect of adopting the above further technical solution is that it is easy to connect the first sewage pipe and the liquid level sensor to the air compressor.

[0042] Furthermore, the intercooler 6 and the aftercooler are connected to a moisture collector, and the first sewage pipe 1 and the liquid level sensor 2 are both connected to the moisture collector.

[0043] The beneficial effect of adopting the above further technical solution is that it is easy to connect the first sewage pipe and the liquid level sensor to the air compressor.

[0044] Furthermore, the liquid level sensor 2 and the drain solenoid valve 3 are both connected to a PLC.

[0045] The beneficial effect of adopting the above further technical solution is: it is easy to realize automatic control through PLC and improve automation.

[0046] Furthermore, the air compressor is provided with a sewage outlet, one end of the first sewage pipeline 1 is connected to the sewage outlet, and the other end of the first sewage pipeline 1 is connected to a sewage main pipe 7.

[0047] The beneficial effect of adopting the above further technical solution is that it is convenient to connect the main sewage pipe to the air compressor through the first sewage pipe.

[0048] Furthermore, a first tee is provided on one side of the first sewage pipe 1 adjacent to the air compressor and on one side of the first sewage pipe 1 adjacent to the sewage main pipe 7, and both ends of the second sewage pipe 5 are connected to the first tee in a one-to-one correspondence.

[0049] The beneficial effect of adopting the above further technical solution is: the provision of the first three-way connection facilitates the connection of the second sewage pipeline with the first sewage pipeline, and facilitates the installation and maintenance of the sewage pipeline.

[0050] Furthermore, a one-way valve 8 is provided on one side of the first sewage pipe 1 adjacent to the sewage main pipe 7 and on one side of the second sewage pipe 5 adjacent to the sewage main pipe 7 .

[0051] The beneficial effect of adopting the above-mentioned further technical solution is: an additional sewage discharge pipeline is opened, and its component structure is: a time-controlled solenoid valve and a one-way valve, forming a dual sewage discharge mode of original signal sewage discharge + time-controlled sewage discharge, and any single circuit failure will not directly affect the working stability of the sewage discharge system.

[0052] Furthermore, the time-controlled solenoid valve is switched on and off once every 5 minutes, the time-controlled solenoid valve 4 is opened for 30 seconds each time, and the access voltage of the time-controlled solenoid valve 4 is 220V or 24V.

[0053] The beneficial effect of adopting the above further technical solution is: by setting the opening and closing cycle time and the opening and maintaining time, it is convenient to carry out the sewage discharge work at intervals. By adding a set of solenoid valves, a dual-channel parallel mode of signal control and time control is formed, and the time-controlled solenoid valve switches on and off at a fixed time according to the logical instructions. The sewage discharge system is guaranteed to be normal to the greatest extent, and any single equipment failure will not directly lead to the failure of the sewage discharge function. By optimizing the process flow, the stable operation of the unit sewage discharge system is achieved.

[0054] The sewage discharge working method before the transformation is as follows:

[0055] The liquid level sensor detects the liquid level signal and transmits it to the PLC.

[0056] The PLC receives the signal, the drain solenoid valve loses power, and the solenoid valve (drain solenoid valve) is turned on to discharge sewage.

[0057] If the liquid level sensor cannot detect the liquid level signal, the signal in the PLC will be interrupted.

[0058] The drain solenoid valve is energized, the solenoid valve (drain solenoid valve) is closed, and sewage discharge stops.

[0059] During sewage discharge work, when the solenoid valve fails to work, the liquid level sensor fails, the PLC signal reception is abnormal, etc., automatic sewage discharge abnormalities will occur, causing liquid waste to accumulate, which will affect the operating stability of the unit.

[0060] Modification content: On the basis of keeping the original sewage discharge process unchanged, three-way devices are added at the sewage discharge outlet of the intercooler and the sewage main inlet, and an additional sewage discharge pipeline is connected. Its composition structure is: time-controlled solenoid valve and one-way valve. A dual sewage discharge mode of original signal sewage discharge + time-controlled sewage discharge is formed, and any single circuit failure will not directly affect the working stability of the sewage discharge system.

[0061] The working mode of time-controlled sewage discharge after transformation is as follows:

[0062] The time-controlled solenoid valve sets the working logic, such as: switching once every 5 minutes, and a single switch lasts for 30 seconds.

[0063] Connect the time-controlled solenoid valve to 220V or 24V power.

[0064] The time-controlled solenoid valve switches on and off at a fixed time according to the logic instructions.

[0065] Optimization of backflush system: According to the original series structure mode, only solenoid valves and one-way valves are used to control isolation. At the same time, a single device failure will cause the entire link to be interrupted, which is unstable and uncertain. In order to eliminate the instability during operation, the series structure is transformed into a parallel structure, maintaining the original backflush gas entering the oil respirator channel and cutting off the gas path to the high-pressure rotor. At the same time, a set of filter regulators is added from the post-filter to supply the high-pressure rotor with backflush separately, thereby effectively isolating the channel connection between the high-pressure rotor and the oil respirator, eliminating the risk of water vapor entering the oil respirator.

[0066] like Figure 2 As shown, further, a solenoid valve 16 is provided on the first pipeline 14 , and the solenoid valve 16 is located between the first filtering and pressure regulating device 10 and the high-pressure rotor 13 .

[0067] The beneficial effect of adopting the above further technical solution is that the provision of the solenoid valve facilitates the opening and closing of the pipeline between the first filtering and pressure regulating device and the high-pressure rotor.

[0068] like Figure 2 As shown, further, the outlet of the post-filter 9 is provided with a second tee, and the first pipeline 14 and the second pipeline 15 are both connected to the second tee.

[0069] The beneficial effects of adopting the above further technical solution are: adding a tee at the outlet of the post-filter, connecting an additional pipeline to the oil breather, and setting a filter pressure regulating device in the middle of the gas circuit. The oil breather and the high-pressure rotor are back-blown separately, and the gas in the high-pressure rotor will not affect the oil breather, thereby improving the operating stability of the unit.

[0070] The air compressor backflush system is mainly aimed at the high-pressure rotor and oil breather. Its purpose is to prevent the male and female screws in the rotor from sticking. There is a 5μm gap during normal operation; at the same time, it ensures that the oil pressure in the lubricating oil tank is normal.

[0071] The process flow of the back-blowing gas circuit is: back-blowing gas → filter pressure reducing device → oil breather → check valve → solenoid valve → high-pressure rotor, among which back-blowing of the high-pressure rotor is only carried out after shutdown.

[0072] The backflush operation mode before the transformation is as follows:

[0073] The outlet gas of the air compressor unit is filtered through the post-filter.

[0074] The filtered gas enters the filter pressure regulating device.

[0075] The reduced pressure gas after filtering and pressure regulating device enters the oil breather and goes to the solenoid valve in front of the high-pressure rotor.

[0076] After the air compressor stops, the solenoid valve is turned on, and the filtered and reduced-pressure gas enters the high-pressure rotor.

[0077] During backflushing operation, if the filter and pressure regulating device is abnormal, it will directly lead to the failure of the backflushing function of the oil breather and the high-pressure rotor; if the solenoid valve in front of the high-pressure rotor fails, the gas in the high-pressure rotor will flow back into the oil breather during operation. If the gas contains water vapor, etc., it will cause the lubricating oil to be emulsified with water, thereby affecting the operating stability of the unit.

[0078] Renovation content: Change the original series backflush mode, cut off the original backflush system to the oil breather, and make the original backflush gas path pass through the solenoid valve to the high-pressure rotor. Add a tee at the outlet of the post-filter, connect an additional pipeline to the oil breather, and set a filter pressure regulating device in the middle of the gas path. Form a working mode in which the oil breather and the high-pressure rotor are backflushed separately, and the gas in the high-pressure rotor will not affect the oil breather, improving the operating stability of the unit.

[0079] The modified backflush works as follows:

[0080] The outlet gas of the air compressor unit is filtered through the post-filter.

[0081] The filtered gas enters the filter pressure regulating device and goes to the oil breather.

[0082] The filtered gas enters the filter pressure regulating device and goes to the solenoid valve in front of the high-pressure rotor.

[0083] After the air compressor stops, the solenoid valve is turned on, and the filtered and reduced-pressure gas enters the high-pressure rotor.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An air compressor blowdown and backflush device, characterized in that: include: An air compressor, a first sewage discharge pipeline, a liquid level sensor, a drain solenoid valve, a time-controlled solenoid valve, and a second sewage discharge pipeline. The first sewage discharge pipeline and the liquid level sensor are both connected to the air compressor. The drain solenoid valve is installed on the first sewage discharge pipeline. Both ends of the second sewage discharge pipeline are connected to both ends of the drain solenoid valve in a one-to-one correspondence. The time-controlled solenoid valve is installed on the second sewage discharge pipeline. The air compressor is provided with a post-filter, a first filter-pressure regulating device, a second filter-pressure regulating device, an oil breather, and a high-pressure rotor. The high-pressure rotor is connected to the post-filter through a first pipeline. The first filter-pressure regulating device is installed on the first pipeline. The oil breather is connected to the post-filter through a second pipeline. The second filter-pressure regulating device is installed on the second pipeline.

2. The air compressor blowdown and backflush device according to claim 1, characterized in that: The air compressor is provided with an intercooler and an aftercooler, and the first sewage pipe and the liquid level sensor are both connected to the intercooler and the aftercooler.

3. The air compressor blowdown and backflush device according to claim 2, characterized in that: The intercooler and the aftercooler are connected to a moisture collector, and the first sewage pipe and the liquid level sensor are both connected to the moisture collector.

4. The air compressor blowdown and backflush device according to claim 1, characterized in that: The liquid level sensor and the drain solenoid valve are both connected to a PLC.

5. The air compressor blowdown and backflush device according to claim 1, characterized in that: The air compressor is provided with a sewage outlet, one end of the first sewage outlet is connected to the sewage outlet, and the other end of the first sewage outlet is connected to a sewage main pipe.

6. The air compressor blowdown and backflush device according to claim 5, characterized in that: A first tee is provided on one side of the first sewage pipe adjacent to the air compressor and on one side of the first sewage pipe adjacent to the sewage main pipe, and both ends of the second sewage pipe are connected to the first tee in a one-to-one correspondence.

7. The air compressor blowdown and backflush device according to claim 5, characterized in that: One-way valves are provided on one side of the first sewage discharge pipeline adjacent to the sewage main pipe and one side of the second sewage discharge pipeline adjacent to the sewage main pipe.

8. The air compressor blowdown and backflush device according to claim 1, characterized in that: The time-controlled solenoid valve is switched on and off once every 5 minutes, and the duration of each opening of the time-controlled solenoid valve is 30 seconds. The access voltage of the time-controlled solenoid valve is 220V or 24V.

9. The air compressor blowdown and backflush device according to claim 1, characterized in that: The first pipeline is provided with a solenoid valve, and the solenoid valve is located between the first filtering and pressure regulating device and the high-pressure rotor.

10. The air compressor blowdown and backflush device according to claim 1, characterized in that: The outlet of the post-filter is provided with a second tee, and the first pipeline and the second pipeline are both connected to the second tee.

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