An intelligent circulating flushing hydraulic system and control method thereof

Abstract

The present invention relates to the technical field of hydraulic system oil circuit cleaning, and discloses an intelligent circulating flushing hydraulic system and a control method thereof. An intelligent circulating flushing hydraulic system comprises: a connecting module, used to connect the hydraulic oil pipe to be flushed to the circulating flushing end; the circulating flushing end comprises an oil supply unit, a filter assembly and a self-cleaning unit, and a two-position three-way valve is commonly connected between the oil supply unit, the filter assembly and the self-cleaning unit; the filter assembly is used to filter the flushing oil that has flushed the hydraulic oil pipe; the self-cleaning unit is used to clean the filter assembly; the oil supply unit is used to provide flushing oil to the flushing process of the hydraulic oil pipe and the cleaning process of the filter assembly. The present invention can maintain the normal process of circulating flushing without frequently replacing the filter assembly, thereby effectively improving the efficiency of circulating flushing.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic system oil circuit cleaning, and in particular to an intelligent circulation flushing hydraulic system and a control method thereof. Background Art

[0002] The hydraulic system is an important mechanical transmission system. It uses liquid as an energy transfer medium and achieves the purpose of mechanical movement through pressure conversion and control. The hydraulic system has the following advantages: High efficiency: The hydraulic system has high working efficiency, can complete various work tasks quickly and accurately, and can automatically adjust the working pressure and flow within a certain range, so as to achieve the maximum utilization of energy. Sensitivity: The hydraulic system has a fast response speed and high control sensitivity. It can respond to various operating instructions quickly, and can also automatically adjust the working pressure and flow within a certain range to achieve precise control. Reliability: The hydraulic system works stably and reliably, because the hydraulic components have a simple and durable structure, can withstand high pressure and high speed, and also have the characteristics of self-lubrication and self-cooling, so that they can work stably for a long time. Adaptability: The hydraulic system has a wide range of adaptability and can adapt to various working environments and working conditions, such as high temperature, low temperature, high altitude, humidity, corrosion, etc., and can also adapt to various workloads and working methods. Safety: The hydraulic system works safely and reliably, and can ensure the safety and reliability of work through various safety protection devices and control systems. In short, hydraulic systems have the advantages of high efficiency, sensitivity, reliability, adaptability and safety, which make them widely used in various mechanical transmission systems.

[0003] Based on the above advantages, many precision instruments such as hydraulic vises and servo valves also use hydraulic systems. They usually use servo hydraulic systems with more precise movements, and their hydraulic valve groups are more precisely processed, requiring higher cleanliness of hydraulic oil. In order to ensure the cleanliness of the hydraulic oil, it is necessary to perform circulating flushing after the pipeline welding is accepted to remove impurities such as particulate matter and welding slag remaining inside the pipeline. The existing hydraulic oil circuit cleaning method usually requires the flushing oil after cleaning each pipeline, which requires the use of a filter to filter the recovered oil. However, when the filter is blocked, the filter has to be replaced. Due to the circular connectivity of the flushing circuit, the cleaning of the hydraulic oil circuit requires a long wait for the filter to be replaced. In this way, the efficiency of cleaning the oil circuit is greatly reduced. If the filter is repeatedly blocked, it will delay more time. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent circulating flushing hydraulic system and a control method thereof to solve the above technical problems:

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An intelligent circulating flushing hydraulic system, comprising:

[0007] A connection module, used to connect the hydraulic oil pipe to be flushed to the circulating flushing end;

[0008] The circulating flushing end includes an oil supply unit, a filter assembly and a self-cleaning unit, wherein a two-position three-way valve is commonly connected between the oil supply unit, the filter assembly and the self-cleaning unit;

[0009] The filter assembly is used to filter the flushing oil that has flushed the hydraulic oil pipe;

[0010] The self-cleaning unit is used to clean the filter assembly;

[0011] The oil supply unit is used to provide flushing oil to the flushing process of the hydraulic oil pipe and the cleaning process of the filter assembly.

[0012] As a further technical solution, the connection module includes an oil separation component, and the oil separation component includes:

[0013] A housing, wherein the housing is connected to an oil inlet pipe and a plurality of oil outlet pipes, and the oil outlet pipe is connected to one end of a hydraulic oil pipe to be tested;

[0014] An independent valve component, wherein a plurality of independent valve components are provided and are arranged corresponding to the oil outlet pipes, wherein the independent valve component comprises a first servo motor fixedly mounted on the housing, wherein an output end of the first servo motor is transmission-connected to a threaded rod, and a sleeve is threadedly connected to the threaded rod;

[0015] The sleeve is slidably connected to the inner wall of the housing, and one end of the sleeve away from the first servo motor is fixedly connected to a valve core, and the valve core is used to control the opening and closing of the corresponding oil outlet pipe.

[0016] As a further technical solution, the connection module further includes:

[0017] An oil return hub, the oil return hub is connected to the other ends of multiple hydraulic oil pipes to be tested, and a flow rate sensor is provided at the connection between each hydraulic oil pipe and the oil return hub, the flow rate sensor is used to collect the flow rate of flushing oil at the oil outlet end of the corresponding hydraulic oil pipe;

[0018] A valve control unit is used to analyze and process flushing oil flow rate data at the oil outlet ends of multiple hydraulic oil pipes, and control the opening and closing of the corresponding independent valve components according to the results of the analysis and processing.

[0019] As a further technical solution, the filter assembly includes:

[0020] A square tube, wherein two square tubes are vertically connected and a circular through hole is provided in the center of the side wall of the overlapping portion of the two square tubes;

[0021] A rotating filter element, wherein the cylindrical rotating filter element is rotatably connected in the circular through hole, the side wall of the rotating filter element is in contact with the intersection line of the tube walls of the two square tubes, and a filtering hole is formed through the side wall of the rotating filter element, and a clamping groove is provided at one end of the rotating filter element close to the circular through hole;

[0022] A filter sheet, the filter sheet is inserted into the slot and is detachably connected to the filter element via screws;

[0023] A second servo motor is fixedly mounted on the side wall of the square tube, and the other end of the rotating filter element is drivingly connected to the output end of the second servo motor;

[0024] A pressure probe, the pressure probe is used to collect the oil pressure of the flushing oil output after passing through the filter assembly;

[0025] A control unit, used for analyzing the flushing oil pressure data and controlling the opening and closing of the second servo motor according to the analysis result;

[0026] As a further technical solution, the oil supply unit includes:

[0027] An oil tank, the oil tank is connected to the two-position three-way valve through a first pipe, and is connected to one of the square tubes through a second pipe;

[0028] The first pipe is provided with a first oil pump and a stop valve.

[0029] As a further technical solution, the self-cleaning unit comprises:

[0030] Sedimentation tank, the sedimentation pipe is connected to another square pipe through a third pipe, and the sedimentation tank is connected to the oil tank through a fourth pipe

[0031] The fourth pipe is provided with a second oil pump and an oil filter.

[0032] A control method for an intelligent circulating flushing hydraulic system comprises the following steps:

[0033] S1, collecting the flow rate of the flushing oil at the oil outlet end of the corresponding hydraulic oil pipe through the flow rate sensor;

[0034] S2, analyzing and processing the flushing oil flow rate data at the oil outlet ends of the plurality of hydraulic oil pipes based on the valve control unit;

[0035] S3. Compare the flow rate measurement data of the oil outlet end of each hydraulic oil pipe with the preset standard range, and sequentially close the independent valve components corresponding to the flow rate measurement data within the preset standard range.

[0036] As a further technical solution, the control method further includes:

[0037] S4, measuring the oil pressure of the flushing oil output after passing through the filter assembly by the pressure probe;

[0038] S5. When the measured actual value of the flushing oil pressure exceeds a preset threshold, the switching operation of the two-position three-way valve and the opening of the second servo motor are controlled.

[0039] Beneficial effects of the present invention:

[0040] (1) The flushing oil provided by the oil supply unit of the present invention can not only flush the hydraulic oil pipe to be flushed, but also automatically clean the filter assembly. When the filter assembly needs to be cleaned and unblocked, the oil supply direction of the oil supply unit is reversed by the two-position three-way valve, and the flushing oil is used to self-clean the filter assembly with the assistance of the self-cleaning unit. The cycle flushing process can be maintained normally without frequent replacement of the filter assembly, thereby effectively improving the efficiency of the cycle flushing.

[0041] (2) The present invention can also sequentially close the independent valve components corresponding to the flow rate measurement data within the preset standard range, thereby increasing the pressure for flushing the hydraulic oil pipes in the remaining passages. This can not only clean multiple hydraulic oil pipes as a whole, but also specifically and more forcefully flush and clean some hydraulic oil pipes containing stubborn impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0044] Figure 2 It is a schematic diagram of the three-dimensional structure of the oil separation component of the present invention after partial sectioning;

[0045] Figure 3 is a cross-sectional view of the oil separation component of the present invention;

[0046] Figure 4 It is a schematic diagram of the three-dimensional structure of the filter assembly of the present invention after partial sectioning;

[0047] Figure 5 It is a schematic diagram of the three-dimensional structure of the filter assembly of the present invention after partial sectioning from another viewing angle;

[0048] Figure 6 It is a cross-sectional view of the filter assembly in the present invention.

[0049] Description of the drawings: 1. Oil tank; 2. Oil filter; 3. Second oil pump; 4. Sedimentation tank; 5. Filter assembly; 6. Oil return center; 7. Hydraulic oil pipe; 8. Oil distribution assembly; 9. Valve control unit; 10. Two-position three-way valve; 11. Stop valve; 12. First oil pump; 51. Square tube; 511. Through hole; 52. Rotating filter element; 521. Filter hole; 53. Second servo motor; 54. Filter plate; 81. Housing; 82. Oil inlet pipe; 83. Oil outlet pipe; 84. First servo motor; 85. Threaded rod; 86. Sleeve; 87. Valve core. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] like Figure 1 As shown, the present invention is an intelligent circulation flushing hydraulic system, comprising:

[0052] A connection module, used to connect the hydraulic oil pipe 7 to be flushed to the circulation flushing end;

[0053] The circulating flushing end includes an oil supply unit, a filter assembly 5 and a self-cleaning unit, wherein a two-position three-way valve 10 is commonly connected between the oil supply unit, the filter assembly 5 and the self-cleaning unit;

[0054] The filter assembly 5 is used to filter the flushing oil flushed through the hydraulic oil pipe 7;

[0055] The self-cleaning unit is used to clean the filter assembly 5;

[0056] The oil supply unit is used to provide flushing oil to the flushing process of the hydraulic oil pipe 7 and the cleaning process of the filter assembly 5 .

[0057] Through the above technical solution, the flushing oil provided by the oil supply unit in this embodiment can not only flush the hydraulic oil pipe 7 to be flushed, but also automatically clean the filter assembly 5. Specifically, when the filter assembly 5 needs to be cleaned and unblocked, the oil supply direction of the oil supply unit is switched by the two-position three-way valve 10, and the flushing oil is used to self-clean the filter assembly 5 with the assistance of the self-cleaning unit, so that the cycle flushing process can be maintained normally without frequently replacing the filter assembly 5, thereby effectively improving the efficiency of the cycle flushing.

[0058] like Figure 2-3 As shown, the connection module includes an oil separation component 8, and the oil separation component 8 includes:

[0059] A housing 81, wherein the housing 81 is connected to an oil inlet pipe 82 and a plurality of oil outlet pipes 83, wherein the oil outlet pipe 83 is connected to one end of the hydraulic oil pipe 7 to be tested;

[0060] Independent valve components, a plurality of independent valve components are provided, and are provided corresponding to the oil outlet pipe 83, and the independent valve components include a first servo motor 84 fixedly mounted on the housing 81, and the output end of the first servo motor 84 is drivingly connected to a threaded rod 85, and a sleeve 86 is threadedly connected to the threaded rod 85;

[0061] The sleeve 86 is slidably connected to the inner wall of the housing 81, and a valve core 87 is fixedly connected to one end of the sleeve 86 away from the first servo motor 84. The valve core 87 is used to control the opening and closing of the corresponding oil outlet pipe 83. When the valve core 87 blocks the oil outlet pipe 83, it indicates that the independent valve is closed.

[0062] Through the above technical solution, this embodiment provides a specific structure of the oil distribution assembly 8, which can realize the oil delivery operation to multiple hydraulic oil pipes 7 to be flushed at the same time, and can independently control the oil delivery opening and closing process of each hydraulic oil pipe 7. Specifically, the first servo motor 84 drives the threaded rod 85 to rotate. Since the sleeve 86 is threadedly connected to the threaded rod 85 and the sleeve 86 is slidably connected to the inner wall of the housing 81, the rotation of the threaded rod 85 can indirectly drive the sliding of the sleeve 86. Figure 3 As shown, the sliding of the sleeve 86 can directly drive the valve core 87 to open or close the oil outlet pipe 83 .

[0063] like Figure 1 As shown, the connection module also includes:

[0064] An oil return hub 6, the oil return hub 6 is connected to the other ends of a plurality of hydraulic oil pipes 7 to be tested, and a flow rate sensor is provided at the connection between each hydraulic oil pipe 7 and the oil return hub 6, the flow rate sensor is used to collect the flow rate of the flushing oil at the oil outlet end of the corresponding hydraulic oil pipe 7;

[0065] The valve control unit 9 is used to analyze and process the flushing oil flow rate data at the oil outlet ends of the plurality of hydraulic oil pipes 7, and control the opening and closing of the corresponding independent valve components according to the results of the analysis and processing.

[0066] Through the above technical scheme, in this embodiment, the oil return center 6 is used to gather the flushing oil output by each hydraulic oil pipe 7 after flushing and uniformly direct it to the filter assembly 5, and on the other hand, through the setting of the flow rate sensor, the flow rate of the flushing oil at the oil outlet end of the corresponding hydraulic oil pipe 7 can be collected, and through the setting of the valve control unit 9, the flushing oil flow rate data at the oil outlet ends of multiple hydraulic oil pipes 7 can be analyzed and processed, and the opening and closing of the corresponding independent valve components can be controlled according to the results of the analysis and processing.

[0067] like Figure 4-6 As shown, the filtering component 5 includes:

[0068] A square tube 51, wherein two square tubes 51 are vertically connected and a circular through hole 511 is formed in the center of the side wall of the overlapping portion of the two square tubes 51;

[0069] The rotating filter element 52 is cylindrical and rotatably connected in the circular through hole 511. The side wall of the rotating filter element 52 is aligned with the intersection line of the tube walls of the two square tubes 51. The side wall of the rotating filter element 52 is penetrated to form a filter hole 52. The end of the rotating filter element 52 close to the circular through hole 511 is provided with a card slot;

[0070] The filter sheet 54 is inserted into the card slot and is detachably connected to the filter element via screws; the detachable connection facilitates the removal and replacement of the filter sheet 54.

[0071] A second servo motor 53 is fixedly mounted on the side wall of the square tube 51 , and the other end of the rotating filter element 52 is drivingly connected to the output end of the second servo motor 53 ;

[0072] A pressure probe, the pressure probe is used to collect the pressure of the flushing oil output after passing through the filter assembly 5;

[0073] A control unit, used to analyze the flushing oil pressure data and control the on and off of the second servo motor 53 according to the analysis result;

[0074] Through the above technical solution, this embodiment provides a specific structure of the filter assembly 5, and the rotating filter element 52 can be rotated in the square tube 51 under the drive of the second servo motor 53, such as Figure 6The position of the rotating filter element 52 is shown, at this time, the flushing oil flushes the filter plate 54 from top to bottom, completing the self-cleaning process of the filter assembly 5, and after the self-cleaning is completed, the second servo motor 53 drives the rotating filter element 52 to rotate counterclockwise by 90°, so that the filter plate 54 can continue to be put into the filtering work of the circulating flushing process, and the above two states can ensure the blocking effect on the other square tube 51. In addition, through the setting of the pressure probe, the flushing oil pressure output after passing through the filter assembly 5 can be collected. When the flushing oil pressure value exceeds the normal value range, the filter plate 54 needs to be flushed and cleaned, and the control unit analyzes the flushing oil pressure data and controls the opening and closing of the second servo motor 53 according to the analysis results, that is, controls the start and end of the self-cleaning process.

[0075] like Figure 1 As shown, the oil supply unit includes:

[0076] An oil tank 1, wherein the oil tank 1 is connected to the two-position three-way valve 10 via a first pipe, and is connected to one of the square tubes 51 via a second pipe;

[0077] The first pipe is provided with a first oil pump 12 and a stop valve 11 .

[0078] Through the above technical solution, this embodiment provides the content of the oil supply unit, wherein the oil tank 1 is used to store flushing oil, and when oil needs to be supplied to the outside, the stop valve 11 and the first oil pump 12 need to be opened in sequence.

[0079] The self-cleaning unit comprises:

[0080] Sedimentation tank 4, the sedimentation pipe is connected to another square pipe 51 through a third pipe, and the sedimentation tank 4 is connected to the oil tank 1 through a fourth pipe.

[0081] The fourth pipe is provided with a second oil pump 3 and an oil filter 2 .

[0082] Through the above technical scheme, this embodiment provides a component of a self-cleaning unit. During the self-cleaning process, it is necessary to connect the oil tank 1 with the filter assembly 5 through a two-position three-way valve 10, and then the flushing oil flushes the filter plate 54 and flows to the sedimentation tank 4. After waiting for the impurities in the sedimentation tank 4 to settle to the bottom of the tank, the second oil pump 3 recovers the upper layer of oil in the sedimentation tank 4 through the oil filter 2 and sends it into the oil tank 1. It should be noted that after the transition sedimentation effect of the sedimentation tank 4, the oil filter 2 does not need to replace the filter element frequently. If the filter element needs to be replaced, it will not affect the circulation flushing process of the hydraulic oil pipe 7.

[0083] A control method for an intelligent circulating flushing hydraulic system comprises the following steps:

[0084] S1, collecting the flow rate of the flushing oil at the oil outlet end of the corresponding hydraulic oil pipe 7 through the flow rate sensor;

[0085] S2, analyzing and processing the flushing oil flow rate data at the oil outlet ends of the plurality of hydraulic oil pipes 7 based on the valve control unit 9;

[0086] S3, comparing the flow rate measurement data of the oil outlet end of each hydraulic oil pipe 7 with the preset standard range, and closing the independent valve components corresponding to the flow rate measurement data within the preset standard range in sequence.

[0087] The specific process of the above data processing and analysis is as follows:

[0088] The length of time after the hydraulic oil pipe 7 to be tested is passed through the flushing oil is divided into n intervals.

[0089] By formula Calculate and obtain the characteristic value Q of the flushing oil flow in the j-th hydraulic oil pipe 7 j ;

[0090] Among them, V j (t) is the measured flow velocity variation over time; It is a standard curve of flow rate change, which is specifically related to the number of hydraulic oil pipes 7 in the passage and can be obtained based on experimental data.

[0091] The eigenvalue Q j With the preset threshold Q θ To compare:

[0092] If Q j ≤Q θ , then close the independent valve corresponding to the j-th hydraulic oil pipe 7;

[0093] If Q j >Q θ , the independent valve component corresponding to the j-th hydraulic oil pipe 7 will not be closed.

[0094] Among them, t i ,t i+1 are the left and right endpoints of the ith interval, ω i is the preset weight coefficient corresponding to the i-th interval;

[0095] Through the above technical solution, this embodiment provides a control method for an intelligent circulating flushing hydraulic system. Specifically, firstly, the flow rate of the flushing oil at the oil outlet of the corresponding hydraulic oil pipe 7 is collected through a flow rate sensor, and then the flushing oil flow rate data at the oil outlet of multiple hydraulic oil pipes 7 are analyzed and processed. Finally, the flow rate measurement data of the oil outlet of each hydraulic oil pipe 7 is compared with the preset standard range, and the independent valve components corresponding to the flow rate measurement data within the preset standard range are closed in turn. The specific analysis and control process is as follows: Calculate and obtain the characteristic value Q of the flushing oil flow in the j-th hydraulic oil pipe 7j , the eigenvalue Q j With the preset threshold Q θ For comparison, when Q j ≤Q θ When , it means that the flow rate of the flushing oil in the j-th hydraulic oil pipe 7 is normal, so there is no need to flush it again, so the independent valve corresponding to the j-th hydraulic oil pipe 7 is closed. j >Q θ In the case of a problem, it is likely that there are stubborn impurities in the pipe that affect the flow rate of the flushing oil. Therefore, keep Q j >Q θ The independent valve component corresponding to the hydraulic oil pipe 7 is in an open state. Due to the closure of the independent valve component corresponding to the hydraulic oil pipe 7 with normal flow rate, the pressure flowing to the remaining hydraulic oil pipes 7 increases. According to the principles of fluid mechanics, the flow rate of the flushing oil will also increase when other factors such as the pipe diameter remain unchanged. Therefore, the remaining hydraulic oil pipes 7 can be flushed with greater intensity. The above process is repeated, and the independent valve components corresponding to the flow rate measurement data within the preset standard range are closed in turn, so that the hydraulic oil pipes 7 can be flushed and cleaned more effectively and specifically.

[0096] The control method further comprises:

[0097] S4, measuring the oil pressure of the flushing oil output after passing through the filter assembly 5 by the pressure probe;

[0098] S5, when the measured actual value of the flushing oil pressure exceeds the preset threshold, the switching operation of the two-position three-way valve 10 and the opening of the second servo motor 53 are controlled, that is, the oil outlet end of the oil tank 1 is directly connected to the filter assembly 5, and the second servo motor 53 drives the rotating valve core 87 to rotate to Figure 6 The situation shown.

[0099] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment 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. An intelligent circulating flushing hydraulic system, characterized in that: include: A connection module, used to connect the hydraulic oil pipe (7) to be flushed to the circulation flushing end; The circulating flushing end comprises an oil supply unit, a filter assembly (5) and a self-cleaning unit, wherein a two-position three-way valve (10) is commonly connected between the oil supply unit, the filter assembly (5) and the self-cleaning unit; The filter assembly (5) is used to filter the flushing oil that has flushed the hydraulic oil pipe (7); The self-cleaning unit is used to clean the filter assembly (5); The oil supply unit is used to provide flushing oil to the hydraulic oil pipe (7) during a flushing process and to the filter assembly (5) during a cleaning process; The connection module comprises an oil separation assembly (8), and the oil separation assembly (8) comprises: A housing (81), the housing (81) being connected to an oil inlet pipe (82) and a plurality of oil outlet pipes (83), the oil outlet pipe (83) being connected to one end of a hydraulic oil pipe (7) to be tested; an independent valve component, wherein a plurality of independent valve components are provided and are arranged corresponding to the oil outlet pipe (83), the independent valve component comprising a first servo motor (84) fixedly mounted on the housing (81), the output end of the first servo motor (84) being drivingly connected to a threaded rod (85), and a sleeve (86) being threadedly connected to the threaded rod (85); The sleeve (86) is slidably connected to the inner wall of the housing (81), and a valve core (87) is fixedly connected to one end of the sleeve (86) away from the first servo motor (84), and the valve core (87) is used to control the opening and closing of the corresponding oil outlet pipe (83); The connection module also includes: An oil return hub (6), the oil return hub (6) being connected to the other ends of a plurality of hydraulic oil pipes (7) to be tested, and a flow rate sensor being provided at the connection between each hydraulic oil pipe (7) and the oil return hub (6), the flow rate sensor being used to collect the flow rate of flushing oil at the oil outlet end of the corresponding hydraulic oil pipe (7); A valve control unit (9), the valve control unit (9) being used to analyze and process flushing oil flow rate data at the oil outlet ends of the plurality of hydraulic oil pipes (7), and to control the opening and closing of the corresponding independent valve components according to the results of the analysis and processing; The filtering component (5) comprises: A square tube (51), wherein two square tubes (51) are vertically connected and through-connected, and a circular through hole (511) is provided in the center of the side wall of the overlapping portion of the two square tubes (51); A rotating filter element (52), the cylindrical rotating filter element (52) is rotatably connected in the circular through hole (511), a side wall of the rotating filter element (52) is in contact with the intersection line of the tube walls of the two square tubes (51), a filtering hole (521) is formed through the side wall of the rotating filter element (52), and a clamping groove is provided at one end of the rotating filter element (52) close to the circular through hole (511); A filter sheet (54), the filter sheet (54) being inserted into the slot and detachably connected to the filter element via screws; A second servo motor (53) is fixedly mounted on the side wall of the square tube (51), and the other end of the rotating filter element (52) is drivingly connected to the output end of the second servo motor (53); A pressure probe, the pressure probe being used to collect the pressure of the flushing oil output after passing through the filter assembly (5); A control unit is used to analyze the flushing oil pressure data and control the on and off of the second servo motor (53) according to the analysis result.

2. The intelligent circulating flushing hydraulic system according to claim 1, characterized in that: The oil supply unit comprises: An oil tank (1), the oil tank (1) being connected to the two-position three-way valve (10) via a first pipe, and being connected to one of the square tubes (51) via a second pipe; The first pipe is provided with a first oil pump (12) and a stop valve (11).

3. The intelligent circulating flushing hydraulic system according to claim 2, characterized in that: The self-cleaning unit includes: A sedimentation tank (4) is connected to another square tube (51) through a sedimentation pipe through a third tube, and the sedimentation tank (4) is connected to the oil tank (1) through a fourth tube; The fourth pipe is provided with a second oil pump (3) and an oil filter (2).

4. A control method for an intelligent circulating flushing hydraulic system as claimed in any one of claims 1 to 3, characterized in that: The control method comprises the following steps: S1, collecting the flow rate of the flushing oil at the oil outlet end of the corresponding hydraulic oil pipe (7) through a flow rate sensor; S2, analyzing and processing flushing oil flow rate data at the oil outlet ends of the plurality of hydraulic oil pipes (7) based on the valve control unit; S3, comparing the flow rate measurement data at the oil outlet end of each hydraulic oil pipe (7) with a preset standard range, and closing the independent valves corresponding to the flow rate measurement data within the preset standard range in sequence.

5. The control method of the intelligent circulating flushing hydraulic system according to claim 4 is characterized in that: The control method further comprises: S4, measuring the oil pressure of the flushing oil output after passing through the filter assembly through a pressure probe; S5. When the measured actual value of the flushing oil pressure exceeds the preset threshold, the switching operation of the two-position three-way valve and the opening of the second servo motor are controlled.

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