Efficient integrated hydraulic flushing device and hydraulic pipeline flushing method

Abstract

The invention provides an efficient integrated hydraulic flushing device and a hydraulic pipeline flushing method, which are used in the field of hydraulic pipeline cleaning, and comprise a flushing system, a gas supply system and a control system, the flushing system comprises a flushing oil tank, a variable frequency oil pump, an oil supply pipeline and an oil return pipeline; the air supply system comprises a screw air compressor and an expansion rubber ball, and the expansion rubber ball is arranged in the flushing oil tank; the control system is electrically connected with the flushing system and the air supply system. By arranging the air supply system, multiple functions of pressure testing, purging and liquid level adjusting are integrated, the use amount of flushing oil is reduced, pressure detection can be conducted on a pipeline connected to a hydraulic pipeline, particulate pollutants in the pipeline can be purged, and the flushing efficiency is improved; the automation degree is high, the operation difficulty of operators is reduced, and the working efficiency is improved; and the device is high in applicability, energy-saving and environment-friendly.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic pipeline cleaning, and in particular relates to a high-efficiency integrated hydraulic flushing device and a hydraulic pipeline flushing method. Background Art

[0002] Hydraulic pipelines have the characteristics of compact structure, fast response, large output force, and easy control. They are widely used in industry, agriculture, aviation, transportation and other fields. When hydraulic pipelines are in operation, the cleanliness of the oil seriously affects the service life and use effect. Therefore, flushing of hydraulic pipelines has become one of the important measures to ensure the cleanliness of the oil. Existing flushing equipment has the following limitations:

[0003] (1) A larger oil tank volume is required, which results in a lot of wasted effort while filtering the oil, which is time-consuming, labor-intensive, and energy-wasting;

[0004] (2) The filter element needs to be replaced frequently, which is costly. In addition, the pump needs to be stopped during the replacement process, which wastes time.

[0005] (3) The flushing efficiency is low. Purging and flushing are separated, and a separate gas source is required for purging, resulting in a long flushing time and difficulty in meeting production schedule requirements. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a high-efficiency integrated hydraulic flushing device, which effectively reduces the amount of flushing oil used and effectively improves the flushing efficiency through automatic control.

[0007] The technical solution adopted by the present invention is: a highly efficient integrated hydraulic flushing device, comprising:

[0008] A flushing system, comprising a flushing oil tank, a variable frequency oil pump, an oil supply pipeline and an oil return pipeline, wherein the oil inlet end of the variable frequency oil pump is connected to the flushing oil tank, and the oil outlet end thereof is connected to the oil supply pipeline, the oil supply pipeline is used to be connected to the oil inlet end of the hydraulic pipeline to be cleaned, and the oil outlet end of the hydraulic pipeline is connected to the flushing oil tank through the oil return pipeline;

[0009] An air supply system, comprising a screw air compressor, an expansion rubber ball and an air supply pipeline, wherein the expansion rubber ball is arranged in the flushing oil tank and is connected to the screw air compressor through the air supply pipeline;

[0010] The control system is electrically connected to the flushing system and the air supply system respectively.

[0011] Furthermore, the air supply system also includes an air storage tank, which is connected to the air outlet end of the screw air compressor; and the air supply pipeline is connected to the air outlet end of the air storage tank.

[0012] Furthermore, the air supply pipeline includes a purge branch pipe, and the purge branch pipe is used to communicate with the hydraulic supply pipeline.

[0013] Furthermore, the flushing oil tank is provided with an oil return filter communicated with the interior thereof, and the oil return pipeline is communicated with the oil return filter.

[0014] Furthermore, the flushing oil tank is also provided with a refueling hole, an electric heater, a thermometer, a liquid level gauge, an exhaust hole and an observation hole.

[0015] Furthermore, the oil supply pipeline includes an oil supply valve and at least two oil supply branches, the oil supply branches are provided with filters and are connected to the variable frequency oil pump; the oil supply valve is used to connect the oil inlet end of the hydraulic pipeline with the oil supply branches.

[0016] Furthermore, the oil return pipeline includes an oil return valve and at least two oil return branches, the oil return branches are connected to the oil return filter, and the oil return valve is used to connect the oil outlet end of the hydraulic pipeline with the oil return branch.

[0017] Furthermore, the plurality of hydraulic pipelines are connected in parallel via an oil inlet manifold and an oil outlet manifold, the oil inlet manifold is used to connect the oil supply valve, and the oil return manifold is used to connect the oil return valve.

[0018] Furthermore, the control system includes a controller and a power supply, the controller is electrically connected to the flushing system and the air supply system respectively; the power supply is electrically connected to the electric heater, the screw air compressor and the variable frequency oil pump respectively.

[0019] A hydraulic pipeline flushing method, using the above-mentioned high-efficiency integrated hydraulic flushing device, comprises the following steps:

[0020] Connect the hydraulic pipelines to be cleaned in parallel, connect the oil inlet manifold to the oil supply valve, and connect the oil outlet manifold to the oil return valve;

[0021] Start the screw air compressor to make the compressed air in the air storage tank reach the set pressure;

[0022] Connect the purge branch pipe to the oil inlet main pipe, open the air valve of the purge branch pipe, and perform a pressure test;

[0023] Removing particulate contaminants from the oil inlet manifold, the hydraulic pipeline, and the oil outlet manifold;

[0024] Fill the flushing oil tank with flushing oil, start the electric heater, and heat the flushing oil to a preset temperature;

[0025] Start the variable frequency oil pump to supply oil to the oil supply pipeline;

[0026] When the liquid level is lower than a preset height, the expansion ball control valve is opened to inflate the expansion rubber ball;

[0027] Start flushing operation.

[0028] The advantages and positive effects of the present invention are as follows: the present application integrates multiple functions of pressure testing, purging and liquid level adjustment by setting up an air supply system. On the one hand, when the flushing oil level in the flushing tank is lowered, the air supply system can inflate the expansion rubber ball to make the liquid level rise to a sufficient height to meet the requirements of the minimum operating state of the variable frequency oil pump, thereby saving the amount of flushing oil; on the other hand, before the flushing operation is started, the air supply system can be used to perform pressure detection on the pipeline connected to the hydraulic pipeline to ensure that the pipeline is tightly connected and there are no leaks; thirdly, it can also be used to purge particulate contaminants in the pipeline to improve flushing efficiency; the device has a high degree of automation, reduces the operating difficulty of the operator and improves work efficiency; it has strong applicability and can be applied to hydraulic pipelines of different space sizes, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of a flushing oil tank according to a specific embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the use of a flushing oil tank according to a specific embodiment of the present invention.

[0032] In the figure:

[0033] 10. Flushing system 11. Flushing oil tank 111. Oil return filter

[0034] 112. Liquid level gauge 113. Electric heater 114. Refueling hole

[0035] 115, observation hole 116, exhaust hole 12, variable frequency oil pump

[0036] 13. Oil supply pipeline 131, oil supply valve 132, oil supply branch pipe

[0037] 133, filter 134, filter control valve 14, oil return line

[0038] 141, oil return valve 142, oil return branch pipe 20, air supply system

[0039] 21. Screw air compressor 22. Expansion rubber ball 23. Air supply pipeline

[0040] 231, gas supply main pipe 2311, oil-water separator 232, gas supply branch pipe

[0041] 233, expansion ball control valve 234, purge branch pipe 235, air blowing valve

[0042] 236, gas storage tank 237, gas storage valve 238, air release valve

[0043] 239, safety valve 30, control system 40, hydraulic pipeline

[0044] 41. Oil inlet pipe 42. Oil outlet pipe DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the present invention proposes an efficient integrated hydraulic flushing device for flushing a hydraulic pipeline 40, comprising: a flushing system 10, an air supply system 20 and a control system 30, wherein the flushing system 10 comprises a flushing oil tank 11, a variable frequency oil pump 12, an oil supply pipeline 13 and an oil return pipeline 14, the oil inlet end of the variable frequency oil pump 12 is connected to the flushing oil tank 11, and the oil outlet end thereof is connected to the oil supply pipeline 13, and the oil supply pipeline 13 is used to communicate with the oil inlet end of the hydraulic pipeline 40 to be cleaned, and supply oil to the hydraulic pipeline 40 to be cleaned. Oil; the oil outlet end of the hydraulic pipeline 40 is connected to the flushing tank 11 through the oil return pipeline 14; the air supply system 20 includes a screw air compressor 21, an expansion rubber ball 22 and an air supply pipeline 23, the screw air compressor 21 can generate compressed air, the expansion rubber ball 22 is arranged in the flushing tank 11, and is connected to the screw air compressor 21 through the air supply pipeline 23; the control system 30 is electrically connected to the flushing system 10 and the air supply system 20 respectively, and is used to control the flushing system 10 and the air supply system 20 to automatically complete the flushing and air supply actions.

[0047] Through the above technical solution, such as Figure 2 , Figure 3 As shown, when the flushing oil in the flushing oil tank 11 flows to the oil supply pipeline 13, the hydraulic pipeline 40 and the oil return pipeline 14 through the variable frequency oil pump 12 and the liquid level decreases, the air supply system 20 can inflate the expansion rubber ball 22 of the flushing oil tank 11 to make it expand and occupy part of the volume in the flushing oil tank 11, so that the flushing oil level in the flushing oil tank 11 rises to a sufficient height to meet the minimum operating state requirements of the variable frequency oil pump 12, without having to add too much flushing oil to the flushing oil tank 11, thereby saving the amount of flushing oil; making the system applicable to hydraulic pipelines 40 of different sizes of space to be flushed, improving its applicability and flexibility; at the same time, saving the time for refueling and draining oil, reducing the workload of workers, and improving the flushing efficiency of the hydraulic pipeline 40.

[0048] Specifically, the flushing oil tank 11 is made of stainless steel and is internally welded by argon arc welding, so it has good cleanliness; the expansion rubber ball 22 is made of oil-resistant rubber and has a spherical structure, which expands when inflated and shrinks when deflated; preferably, in order to further improve the fuel-saving effect, one side of the bottom of the flushing oil tank 11 is connected to the variable frequency oil pump 12, and the bottom of the flushing oil tank 11 away from the connection portion bulges inward to continue to reduce the volume of the flushing oil tank 11.

[0049] The oil inlet end of the variable frequency oil pump 12 is provided with an oil pump control valve, which is electrically connected to the control system 30 to control the working state of the variable frequency oil pump 12 according to the progress of the flushing operation. Specifically, when the variable frequency oil pump 12 is working, the oil pump control valve is opened; when the variable frequency oil pump 12 is turned off, the oil pump control valve is closed.

[0050] The above-mentioned air supply system 20 also includes an air tank 236, which is connected to the air outlet end of the screw air compressor 21. The compressed air generated by the screw air compressor 21 enters the air tank 236 and forms a certain pressure, so that the gas has good fluidity when it is discharged from the air tank 236; the air supply pipeline 23 is connected to the air outlet end of the air tank 236.

[0051] The air inlet and outlet ends of the above-mentioned air tank 236 are respectively provided with air valves 237, which are respectively electrically connected to the control system 30 to coordinate with the progress of the flushing operation to control the working state of the air tank 236. Specifically, when it is necessary to input compressed air into the air tank 236, the air valve 237 at the air inlet end of the air tank 236 is opened, and the air valve 237 at the air outlet end of the air tank 236 is closed; when it is necessary to discharge the compressed air in the air tank 236 into the air supply pipeline 23, the air valve 237 at the air inlet end of the air tank 236 is closed, and the air valve 237 at the air outlet end of the air tank 236 is opened.

[0052] Furthermore, the air supply pipeline 23 includes a purge branch pipe 234, which is used to communicate with the hydraulic pipeline 40. This solution allows the hydraulic pipeline 40 to be pre-cleaned by compressed air before being cleaned with cleaning oil. Specifically, the compressed air discharged from the purge branch pipe 234 enters the hydraulic pipeline 40, and cleans the hydraulic pipeline 40 and pollutants such as floating dust and particulate matter in the pipeline, thereby reducing the workload of subsequently using cleaning oil to clean the hydraulic pipeline 40 and effectively improving the cleaning efficiency.

[0053] When the above-mentioned purging operation is performed, the purging branch pipe 234 is connected to the oil inlet end of the hydraulic pipeline 40, and the oil outlet end of the hydraulic pipeline 40 is disconnected from the flushing oil tank 11 to discharge the pollutants to the outside.

[0054] Preferably, the above-mentioned air supply pipeline 23 also includes an air supply main pipe and an air supply branch pipe 232, the air inlet end of the air supply main pipe is connected to the air outlet end of the air storage tank 236; the air supply branch pipe 232 and the purge branch pipe 234 are both connected to the air supply main pipe, and each air supply branch pipe 232 is connected in parallel with a number of expansion rubber balls 22; further, the air supply main pipe is provided with an oil-water separator 2311, so that the air discharged through the air supply pipeline 23 can achieve an oil-free and water-free clean effect to meet its use requirements.

[0055] The above-mentioned purge branch pipes 234 are all provided with a blowing valve 235 , which is electrically connected to the control system 30 and is opened under the control of the control system 30 to inflate the expansion rubber ball 22 .

[0056] The above-mentioned air supply branch pipe 232 is also provided with an expansion ball control valve 233, an air release valve 238 and a safety valve 239, and the three are electrically connected to the controller; the expansion ball control valve 233 is arranged at one end close to the expansion rubber ball 22, and when inflation operation is required, the control system 30 opens the expansion ball control valve 233; when the inflation operation is completed, the control system 30 closes the expansion ball control valve 233; the air release valve 238 is arranged on the pipeline between the expansion ball control valve 233 and the expansion rubber ball 22, and opening the air release valve 238 can discharge the gas in the expansion rubber ball 22; the safety valve 239 is arranged on the pipeline between the air release valve 238 and the expansion rubber ball 22, and a safety alarm device is arranged in the safety valve 239. When the pressure in the expansion rubber ball 22 reaches a preset value, an alarm is issued so that the controller controls the safety valve 239 to open to prevent the expansion rubber ball 22 from bursting due to excessive pressure.

[0057] The above-mentioned flushing oil tank 11 is provided with an oil return filter 111 connected to its interior, and the oil outlet section of the hydraulic pipeline 40 is connected to the oil return filter 111. The oil return filter 111 can filter the flushing oil returning to the flushing oil tank 11 to ensure the cleanliness of the flushing oil returning to the flushing oil tank 11, so that the cleaning operation can be carried out continuously, ensuring the cleaning effect of the hydraulic pipeline 40.

[0058] like Figure 1As shown, the flushing oil tank 11 is also provided with a filling hole 114, an electric heater 113, a thermometer, a liquid level gauge 112, an exhaust hole 116 and an observation hole 115; wherein the filling hole 114 is used to add flushing oil to the flushing oil tank 11 before the cleaning operation begins; the electric heater 113 is used to heat the cleaning oil so that it can achieve a good cleaning effect, the thermometer is used to detect the temperature of the cleaning oil and transmit the signal to the control system 30 so that the control system 30 automatically controls the electric heater 113 to start or stop, so that the temperature of the flushing oil is maintained at an optimal temperature; the liquid level gauge 112 is used to detect the liquid level height of the flushing oil in the flushing oil tank 11 to ensure that it meets the use requirements, and is arranged at a position of the flushing oil tank 11 that is convenient for observation; the exhaust valve is used to discharge the gas in the flushing oil tank 11; the observation hole 115 is used for the operator to observe the situation in the flushing oil tank 11 at all times to ensure the normal operation of the flushing operation.

[0059] Preferably, the oil supply pipeline 13 includes an oil supply valve 131 and at least two oil supply branches 132. The oil supply branch 132 is provided with a filter 133. The oil supply branch 132 is connected to the variable frequency oil pump 12. The oil outlet of the oil supply valve 131 is connected to the oil inlet of the hydraulic pipeline 40, and the oil inlet of the oil supply valve 131 is connected to the oil supply branch 132. In other words, the variable frequency oil pump 12 transports the cleaning oil to the oil supply valve 131 through the oil supply branch 132, and then transports it to the hydraulic pipeline 40 for cleaning. When in use, one of the oil supply branches 132 is in a connected state, and the other oil supply branches 132 are in a closed state. When the filter 133 on the used oil supply branch 132 is abnormal and needs to be repaired or replaced, the oil supply branch 132 can be closed and the other oil supply branch 132 can be opened to ensure that the flushing operation can be carried out continuously.

[0060] The filter 133 is provided with filter control valves 134 at both ends. The oil supply valve 131 and the filter control valve 134 are electrically connected to the controller, and are opened or closed under the control of the controller. Specifically, the oil supply valve 131 and the filter control valve 134 of an oil supply branch pipe 132 are opened to ensure that the two are connected; the oil supply valve 131 and the filter control valve 134 of an oil supply branch pipe 132 are closed to repair and replace the filter 133 of the oil supply branch pipe 132.

[0061] The oil return pipeline 14 includes an oil return valve 141 and at least two oil return branches 142. The oil return branch 142 is connected to the oil return filter 111. The oil inlet end of the oil return valve 141 is connected to the oil outlet end of the hydraulic pipeline 40, and the oil outlet end of the oil return valve 141 is connected to the oil return branch 142. The number of the oil return branch 142 is set corresponding to the oil return filter 111, and multiple oil return branches 142 are connected at the same time to improve the oil return efficiency.

[0062] The oil return valve 141 is electrically connected to the controller and is opened or closed under the control of the controller; the oil return valve 141 is detachably connected to the oil outlet end of the hydraulic pipeline 40 so that the two can be disconnected during the purging operation to discharge the pollutants to the outside.

[0063] Preferably, if Figure 2 As shown, multiple hydraulic pipelines 40 are connected in parallel through an oil inlet manifold 41 and an oil outlet manifold 42. The oil inlet manifold 41 is used to connect the oil supply valve 131, and the oil outlet manifold 42 is used to connect the oil return valve 141, so as to further improve the cleaning efficiency of the hydraulic pipelines 40.

[0064] The above-mentioned control system 30 includes a controller and a power supply. The controller is electrically connected to the flushing system 10 and the air supply system 20. Specifically, the controller is respectively electrically connected to the variable frequency oil pump 12, the oil pump control valve arranged at the oil inlet end of the variable frequency oil pump 12, the filter control valve 134 arranged at both ends of the filter 133, the oil supply valve 131 arranged on the oil supply pipeline 13, the return oil valve 141 arranged on the return oil pipeline 14, the oil-water separator and the blowing valve 235 arranged on the air supply pipeline 23, the air storage valve 237 arranged at both ends of the air storage tank 236, the expansion ball control valve 233 arranged on the air supply pipeline 23, the air release valve 238 and the safety valve 239 as well as the thermometer and the electric heater 113; the power supply is respectively electrically connected to the electric heater 113, the screw air compressor 21 and the variable frequency oil pump 12 to supply power to the three.

[0065] The above-mentioned controller is electrically connected to the variable frequency oil pump 12 to adjust the working pressure according to different hydraulic pipelines 40; specifically, when the hydraulic pipeline 40 is larger, a higher flushing pressure is required, and the controller adjusts it by controlling the variable frequency motor of the variable frequency oil pump 12 to meet the larger pressure demand in the pipeline; if the hydraulic pipeline 40 is smaller, the required flushing pressure is lower, and the controller adjusts it by controlling the variable frequency motor of the variable frequency oil pump 12 to meet the smaller pressure demand in the pipeline; through the above-mentioned technical solution, the flushing requirements of different hydraulic pipelines 40 can be ensured, and at the same time it is more energy-saving and environmentally friendly.

[0066] In a preferred embodiment, the flushing oil tank 11, the variable frequency oil pump 12, the oil supply pipeline 13, the oil return pipeline 14, the screw air compressor 21, the air storage tank 236 and the air supply main pipe 231 are all arranged in a shell, the oil supply valve 131 and the oil return valve 141 are arranged on the shell, the oil inlet main pipe 41 and the oil outlet main pipe 42 are respectively connected to the oil supply valve 131 and the oil return valve 141; the purge branch pipe 234 passes through the shell and extends to the outside of the shell. A blowing valve 235 is provided on the pipeline to facilitate the connection of the oil inlet main pipe 41 of the hydraulic pipeline 40. The overall structure is compact and reasonable, and more integrated.

[0067] A hydraulic pipeline flushing method, using the high-efficiency integrated hydraulic flushing device proposed in the present application, comprises the following steps:

[0068] (1) placing the high-efficiency integrated hydraulic flushing device at a designated location, connecting multiple hydraulic pipelines 40 in parallel, connecting the oil inlet manifold 41 of the hydraulic pipeline 40 to the oil supply valve 131, and connecting the oil outlet manifold 42 of the hydraulic pipeline 40 to the oil return valve;

[0069] (2) Starting the screw air compressor 21 to make the compressed air in the air storage tank 236 reach the set pressure;

[0070] (3) Connect the purge branch pipe 234 with the oil inlet main pipe 41, open the air valve 235 of the purge branch pipe 234, close the oil supply valve 131 and the oil return valve 141, and allow the compressed air in the air storage tank 236 to enter the hydraulic pipeline 40 and the oil outlet main pipe 42 through the oil inlet main pipe 41 to perform a pressure test; in a specific embodiment, when the pressure in the pipeline is controlled at 0.6 MPa, perform a system leak test to ensure that each joint is tightly sealed to prevent leakage of flushing oil during the flushing operation.

[0071] (4) Start the purging operation to remove the particulate pollutants inside the oil inlet main pipe 41, the hydraulic pipeline 40 and the oil outlet main pipe 42; specifically, after the pressure test is passed, disconnect the connection between the oil outlet main pipe 42 and the oil return valve 141, so that the oil outlet main pipe 42 is connected to the outside, and the compressed air in the air storage tank 236 enters the hydraulic pipeline 40 through the oil inlet main pipe 41, takes away the particulate pollutants in the hydraulic pipeline 40 and is discharged through the oil outlet main pipe 42; when the gas discharged through the oil outlet main pipe 42 no longer contains particulate pollutants, the purging operation is completed, at this time, close the air storage valve 237, stop inputting gas into the oil inlet main pipe 41, and connect and fix the oil outlet main pipe 42 to the oil return valve 141.

[0072] (5) Fill the flushing oil tank 11 with flushing oil, start the electric heater 113, and heat the flushing oil to a preset temperature;

[0073] (6) Start the variable frequency oil pump 12 to supply oil to the oil supply pipeline 13; the flushing oil flows back into the flushing oil tank 11 through the oil supply branch pipe 132, the oil inlet main pipe 41, the oil outlet main pipe 42 of the hydraulic pipeline 40 and the oil return branch pipe 142 in sequence, and the flushing oil level in the flushing oil tank 11 decreases;

[0074] (7) Check the liquid level of the flushing oil tank 11. When the liquid level is lower than the preset height, open the expansion ball control valve 233 to inflate the expansion rubber ball 22. After ensuring that the liquid level meets the flushing operation requirements, close the expansion ball control valve 233.

[0075] (8) Start the flushing operation, and remove the high-efficiency integrated hydraulic flushing device after the cleanliness of the flushing oil reaches the flushing requirements.

[0076] The present application integrates multiple functions of pressure testing, purging and liquid level adjustment by setting up an air supply system. On the one hand, when the flushing oil level in the flushing tank is lowered, the air supply system can inflate the expansion rubber ball to make the flushing oil level in the flushing tank rise to a sufficient height to meet the minimum operating state requirements of the variable frequency oil pump, thereby saving the use of flushing oil; on the other hand, before the flushing operation is started, the air supply system can be used to perform pressure detection on the pipeline connected to the hydraulic pipeline to ensure that the pipeline is tightly connected and there are no leaks; thirdly, it can also be used to purge particulate contaminants in the pipeline to improve flushing efficiency; the present device has a high degree of automation, which reduces the operating difficulty of the operator and improves work efficiency; it has strong applicability and can be applied to hydraulic pipelines of different space sizes, which is more energy-saving and environmentally friendly.

[0077] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A highly efficient integrated hydraulic flushing device, characterized in that: include: A flushing system, comprising a flushing oil tank, a variable frequency oil pump, an oil supply pipeline and an oil return pipeline, wherein the oil inlet end of the variable frequency oil pump is connected to the flushing oil tank, and the oil outlet end thereof is connected to the oil supply pipeline, the oil supply pipeline is used to be connected to the oil inlet end of the hydraulic pipeline to be cleaned, and the oil outlet end of the hydraulic pipeline is connected to the flushing oil tank through the oil return pipeline; An air supply system, comprising a screw air compressor, an expansion rubber ball and an air supply pipeline, wherein the expansion rubber ball is arranged in the flushing oil tank and is connected to the screw air compressor through the air supply pipeline; The control system is electrically connected to the flushing system and the air supply system respectively.

2. The high-efficiency integrated hydraulic flushing device according to claim 1 is characterized in that: The air supply system also includes an air storage tank, which is connected to the air outlet end of the screw air compressor; and the air supply pipeline is connected to the air outlet end of the air storage tank.

3. The high-efficiency integrated hydraulic flushing device according to claim 1 or 2, characterized in that: The air supply pipeline includes a purge branch pipe, and the purge branch pipe is used to communicate with the hydraulic supply pipeline.

4. The high-efficiency integrated hydraulic flushing device according to claim 3 is characterized in that: The flushing oil tank is provided with an oil return filter communicated with the interior thereof, and the oil return pipeline is communicated with the oil return filter.

5. The high-efficiency integrated hydraulic flushing device according to claim 4 is characterized in that: The flushing oil tank is also provided with a refueling hole, an electric heater, a thermometer, a liquid level gauge, an exhaust hole and an observation hole.

6. The high-efficiency integrated hydraulic flushing device according to claim 4 or 5, characterized in that: The oil supply pipeline includes an oil supply valve and at least two oil supply branches. The oil supply branches are provided with filters and are connected to the variable frequency oil pump. The oil supply valve is used to connect the oil inlet end of the hydraulic pipeline with the oil supply branches.

7. The high-efficiency integrated hydraulic flushing device according to claim 6 is characterized in that: The oil return pipeline includes an oil return valve and at least two oil return branches, the oil return branches are connected to the oil return filter, and the oil return valve is used to connect the oil outlet end of the hydraulic pipeline with the oil return branch.

8. The high-efficiency integrated hydraulic flushing device according to claim 7 is characterized in that: The plurality of hydraulic pipelines are connected in parallel via an oil inlet manifold and an oil outlet manifold. The oil inlet manifold is used to connect the oil supply valve, and the oil return manifold is used to connect the oil return valve.

9. The high-efficiency integrated hydraulic flushing device according to claim 7 or 8, characterized in that: The control system includes a controller and a power supply. The controller is electrically connected to the flushing system and the air supply system respectively; the power supply is electrically connected to the electric heater, the screw air compressor and the variable frequency oil pump respectively.

10. A hydraulic pipeline flushing method, characterized in that: The high-efficiency integrated hydraulic flushing device according to any one of claims 1 to 9 comprises the following steps: Connect the hydraulic pipelines to be cleaned in parallel, connect the oil inlet manifold to the oil supply valve, and connect the oil outlet manifold to the oil return valve; Start the screw air compressor to make the compressed air in the air storage tank reach the set pressure; Connect the purge branch pipe to the oil inlet main pipe, open the air valve of the purge branch pipe, and perform a pressure test; Removing particulate contaminants from the oil inlet manifold, the hydraulic pipeline, and the oil outlet manifold; Fill the flushing oil tank with flushing oil, start the electric heater, and heat the flushing oil to a preset temperature; Start the variable frequency oil pump to supply oil to the oil supply pipeline; When the liquid level is lower than a preset height, the expansion ball control valve is opened to inflate the expansion rubber ball; Start flushing operation.

Images