Hydraulic oil cleaning machine capable of being movably used

Abstract

The invention provides a hydraulic oil cleaning machine capable of being movably used, and belongs to the technical field of hydraulic oil cleaning machines. The handle, the phase sequence error indicating lamp, the power indicating lamp, the particle counter, the oil pump outlet pressure gauge, the exhaust plug, the oil suction pipe, the motor, the pre-filtering detection connector, the pressure gauge connector, the oil pump, the one-way valve, the pre-filtering detection ball valve, the oil outlet pipe, the post-filtering detection ball valve, the power main switch, the motor starting button and the motor stopping button are integrally installed on the frame. And detecting an oil return ball valve and an oil drainage plug. According to the movable hydraulic oil cleaning machine, all the components are integrated into a whole, the movable hydraulic oil cleaning machine compact in structure is formed, and the integrated design of oil conveying, filtering and cleanliness detection is achieved; transmission connection of the motor and the oil pump provides stable power for oil flowing, and serial arrangement of the oil suction pipe, the one-way valve, the fine filter and the oil outlet pipe ensures that an oil filtering path is smooth.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydraulic oil cleaning machines, and particularly relates to a movable hydraulic oil cleaning machine. BACKGROUND

[0002] In the use process of hydraulic equipment such as special vehicles, hydraulic oil as a key medium for power transmission directly affects the operation stability and service life of the equipment. Such equipment often needs to work in complex environments such as the wild, and impurities are easily mixed into the oil after long-term use, causing the oil to become turbid, the quality of the oil to decrease, and then affecting the normal work of the hydraulic system.

[0003] In the prior art, special oil filtering equipment for such equipment is scarce, and ordinary oil filtering equipment has many defects: on the one hand, there is a lack of online real-time detection function, and the cleanliness level before and after oil filtering cannot be accurately grasped, it is difficult to judge whether the filtering effect meets the standard, and incomplete filtering or excessive filtering may occur; on the other hand, the cost of oil filtering is high, and the traditional treatment method needs to contact the manufacturer for cleaning or replace the hydraulic oil as a whole, which not only consumes a large amount of funds, but also causes waste of oil, and the structure of the ordinary oil filtering equipment is loose and the portability is poor, so it is difficult to adapt to diversified working scenes such as the wild, and the filtering efficiency and filtering precision are limited, which cannot meet the high-quality filtering demand of the hydraulic oil of the special vehicle, and seriously affects the operation continuity and use cost control of the equipment. SUMMARY

[0004] The purpose of the present application is to provide a movable hydraulic oil cleaning machine, which aims to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A movable hydraulic oil cleaning machine, comprising a vehicle frame, and a handle, a phase sequence error indicator, a power indicator, a particle counter, an oil pump outlet pressure gauge, an exhaust plug, an oil suction pipe, an electric motor, a pre-filtering detection interface, a pressure gauge interface, an oil pump, a one-way valve, a pre-filtering detection ball valve, an oil outlet pipe, a post-filtering detection ball valve, a power switch, a motor start button, a motor stop button, a detection return oil ball valve and a drain plug which are integrated on the vehicle frame; The electric motor is in driving connection with the oil pump, the oil suction pipe is in communication with the oil inlet end of the oil pump, and the oil outlet end of the oil pump is in series connection with the one-way valve and the fine filter in sequence, and the oil outlet pipe is in communication with the oil outlet end of the fine filter; The particle counter is connected with the oil outlet end pipeline of the oil pump through the pre-filtering detection interface and the pre-filtering detection ball valve, and is connected with the oil outlet end pipeline of the fine filter through the post-filtering detection ball valve, and the detection return oil ball valve is connected in series in the return oil pipeline of the particle counter.

[0006] As a preferred scheme of the present application, the frame adopts a corrosion-resistant treatment structure, the handle is a hand-push type moving gripper, and the oil suction pipe and the oil discharge pipe adopt a combined structure of a soft pipe and a hard pipe, which is convenient for adapting to the connection requirements of different use scenarios.

[0007] As a preferred scheme of the present application, the oil pump is a gear conveying pump, which is internally integrated with a safety valve, and does not need to be additionally connected with a safety pipeline, and the motor is a three-phase asynchronous motor, which cooperates with the oil pump to realize the power supply of oil liquid conveying and filtering.

[0008] As a preferred scheme of the present application, the fine filter adopts a quick-opening type structure design, is internally assembled with a high-precision filtering filter core, the air discharge plug is arranged at the top of the fine filter, and is used for discharging gas in the fine filter cylinder, and the oil discharge plug is arranged at the bottom of the fine filter, and is used for emptying dirty oil in the cylinder when the filter core is replaced.

[0009] As a preferred scheme of the present application, the particle counter is an online laser particle counter, the panel of which is provided with operation buttons, supports multiple flow rate mode switching, and can realize real-time detection of the cleanliness grade of oil liquid before and after filtering.

[0010] As a preferred scheme of the present application, the oil pump outlet pressure gauge is communicated with the oil discharge end of the oil pump through a pressure gauge interface, and is used for displaying the pressure value of the oil discharge port of the oil pump in real time; and the check valve is used for protecting the oil pump, and avoiding damage to the equipment caused by impact pressure.

[0011] As a preferred scheme of the present application, the power supply on-off switch is used for controlling the on-off of the total power supply of the equipment, the power supply indicator light is turned on after the power supply is connected, and the phase sequence error indicator light is turned on when the wiring phase sequence is wrong; the motor start button and the motor stop button are respectively used for controlling the start and stop of the motor, and realize the start and stop control of the equipment.

[0012] Compared with the prior art, the present application has the beneficial effects that: the components are integrated, a compact movable hydraulic oil cleaning machine is formed, and the integration design of oil liquid conveying, filtering and cleanliness detection is realized; the transmission connection of the motor and the oil pump provides stable power for oil liquid flow, the serial arrangement of the oil suction pipe, the check valve, the fine filter and the oil discharge pipe ensures the smoothness of the oil liquid filtering path, the particle counter is connected with the pipelines before and after filtering through the pre-filtering detection interface, the pre-filtering detection ball valve and the post-filtering detection ball valve, and cooperates with the oil return control of the oil return ball valve, can completely cover the cleanliness monitoring of the whole process of oil liquid filtering, solves the problems of dispersed functions of traditional oil filtering equipment and inability to master the filtering effect in real time, and the integrated structure is convenient for the overall movement of the equipment and adapts to the use requirements of multiple scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the technical solutions of the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. Among them: Fig. 1 It is a schematic diagram of the overall structure of the present application. Fig. 2 It is a schematic diagram of the side view structure of the present application.

[0014] In the figure: 1, handle; 2, phase sequence error indicator; 3, power indicator; 4, particle counter; 5, oil pump outlet pressure gauge; 6, exhaust block; 7, oil suction pipe; 8, motor; 9, pre-filter detection interface; 10, pressure gauge interface; 11, oil pump; 12, check valve; 13, pre-filter detection ball valve; 14, oil outlet pipe; 15, post-filter detection ball valve; 16, power supply master switch; 17, motor start button; 18, motor stop button; 19, detection return oil ball valve; 20, oil drain plug; 21, vehicle frame. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0016] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0017] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0018] EMBODIMENT REFERENCE Figs. 1-2For the embodiment of the application, the embodiment provides a movable hydraulic oil cleaning machine, which comprises a frame 21, and a handle 1, a phase sequence error indicator 2, a power indicator 3, a particle counter 4, an oil pump outlet pressure gauge 5, an exhaust block 6, an oil suction pipe 7, an electric motor 8, a pre-filter detection interface 9, a pressure gauge interface 10, an oil pump 11, a one-way valve 12, a pre-filter detection ball valve 13, an oil outlet pipe 14, a post-filter detection ball valve 15, a power supply master switch 16, a motor start button 17, a motor stop button 18, a detection return oil ball valve 19 and a drain block 20 which are integrally installed on the frame 21. The electric motor 8 is in transmission connection with the oil pump 11, the oil suction pipe 7 is in communication with an oil inlet end of the oil pump 11, and an oil outlet end of the oil pump 11 is in series connection with the one-way valve 12 and a precision filter in sequence, and the oil outlet pipe 14 is in communication with an oil outlet end of the precision filter. The particle counter 4 is connected with the oil outlet end pipeline of the oil pump 11 through the pre-filter detection interface 9 and the pre-filter detection ball valve 13, and is connected with the oil outlet end pipeline of the precision filter through the post-filter detection ball valve 15, and the detection return oil ball valve 19 is connected in series in the return oil pipeline of the particle counter 4.

[0019] The components are integrated, the movable hydraulic oil cleaning machine with compact structure is formed, and the integration design of oil liquid conveying, filtering and cleanliness detection is realized; the transmission connection of the electric motor 8 and the oil pump 11 provides stable power for oil liquid flow, the series arrangement of the oil suction pipe 7, the one-way valve 12, the precision filter and the oil outlet pipe 14 ensures smooth oil liquid filtering path, the particle counter 4 is connected with the pipelines before and after filtering through the pre-filter detection interface 9, the pre-filter detection ball valve 13 and the post-filter detection ball valve 15 respectively, and cooperates with the return oil control of the detection return oil ball valve 19, so that the cleanliness monitoring of the whole process of oil liquid filtering can be completely covered, the problems of dispersed functions and inability to master the filtering effect in real time of the traditional oil filtering equipment are solved, and the integrated structure is convenient for the overall movement of the equipment and is suitable for the use requirements of multiple scenes.

[0020] Specifically, the frame 21 adopts a corrosion-resistant treatment structure, the handle 1 is a hand-pushed moving gripper, and the oil suction pipe 7 and the oil outlet pipe 14 adopt a structure form of combination of a soft pipe and a hard pipe, so as to adapt to the connection requirements of different use scenes.

[0021] The frame 21 adopts a corrosion-resistant treatment structure, the handle 1 is a hand-pushed moving gripper, and the oil suction pipe 7 and the oil outlet pipe 14 adopt a structure form of combination of a soft pipe and a hard pipe, so as to adapt to the connection requirements of different use scenes. The frame 21 adopts a corrosion-resistant treatment structure, which effectively improves the durability of the equipment in complex environments and prolongs the service life of the equipment; the handle 1 is designed as a hand-pushed moving gripper, which cooperates with the overall structure of the frame 21 and improves the portability of the equipment, so that the operator can be conveniently and flexibly transferred between different work sites; the oil suction pipe 7 and the oil outlet pipe 14 adopt a structure form of combination of a soft pipe and a hard pipe, which not only ensures the rigid support of the pipeline connection, but also has a certain flexible adaptation capability, can easily connect different types and positions of hydraulic oil system interfaces, reduces the difficulty of field connection, enhances the adaptability of the equipment to diversified use scenes, and avoids the problem of low work efficiency caused by poor pipeline adaptability.

[0022] Further, the oil pump 11 is a gear delivery pump, which is internally integrated with a safety valve, and does not need to be additionally connected with a safety pipeline. The motor 8 is a three-phase asynchronous motor, which cooperates with the oil pump 11 to realize the delivery and filtering power supply of oil.

[0023] The oil pump 11 is a gear delivery pump and is internally integrated with a safety valve, and does not need to be additionally provided with a safety pipeline, thereby simplifying the pipeline layout of the equipment, making the pump set structure more compact, and improving the sealing reliability and reducing the pipeline leakage risk. The motor 8 is a three-phase asynchronous motor, which cooperates with the gear delivery pump to form a stable power supply unit, can provide continuous and sufficient power for oil delivery and filtering, ensures efficient progress of the filtering operation, avoids problems such as low oil filtering efficiency and incomplete filtering caused by insufficient power, and simultaneously, the structural characteristics of the gear delivery pump enable it to adapt to oil medium of different viscosities, thereby widening the application range of the equipment.

[0024] Preferably, the fine filter adopts a quick-opening structure design, is internally equipped with a high-precision filtering cartridge, the exhaust plug 6 is arranged at the top of the fine filter, and is used for discharging gas in the fine filter cylinder, and the oil discharge plug 20 is arranged at the bottom of the fine filter, and is used for emptying dirty oil in the cylinder when replacing the filter cartridge.

[0025] The fine filter adopts a quick-opening structure design, which facilitates an operator to quickly open the filter for filter cartridge replacement or maintenance operation, greatly shortens the equipment downtime maintenance time, and improves the operation continuity. The high-precision filtering cartridge internally equipped can effectively intercept impurity particles in the oil, and guarantee the cleanliness of the filtered oil. The exhaust plug 6 arranged at the top of the fine filter can timely discharge gas in the fine filter cylinder, avoids the influence of residual gas on the full-area filtration of the filter cartridge, and ensures the stability of the filtering efficiency and filtering effect. The oil discharge plug 20 arranged at the bottom of the fine filter can quickly empty the dirty oil in the cylinder when replacing the filter cartridge, avoids the pollution of the dirty oil to the new filter cartridge or the surrounding environment, simplifies the operation process of the filter cartridge replacement, and improves the maintenance convenience.

[0026] Further, the particle counter 4 is an online laser particle counter, the panel of which is provided with operation buttons, supports multiple flow rate mode switching, and can realize real-time detection of the cleanliness level of the oil before and after filtering.

[0027] The particle counter 4 is an online laser particle counter, has a real-time detection function, can accurately capture the cleanliness level of oil before and after filtration, and enables the operator to intuitively master the filtration effect, so as to determine whether to stop filtration according to the cleanliness, avoid excessive filtration or substandard filtration, and simplify the operation process of the equipment through the operation keys arranged on the panel. The multiple flow rate mode switching function can adapt to the oil detection requirements under different working conditions, ensure that accurate cleanliness detection results can be obtained under different oil flow states, solve the defects of traditional oil filtration equipment, such as lack of real-time detection means and inability to accurately judge the filtration effect, and provide reliable protection for the filtration quality of oil.

[0028] Specifically, the oil pump outlet pressure gauge 5 is communicated with the oil outlet end of the oil pump 11 through the pressure gauge interface 10, and is used to display the pressure value of the oil outlet of the oil pump in real time; the one-way valve 12 is used to protect the oil pump 11 and avoid damage to the equipment caused by impact pressure.

[0029] Specifically, the oil pump outlet pressure gauge 5 is communicated with the oil outlet end of the oil pump 11 through the pressure gauge interface 10, and is used to display the pressure value of the oil outlet of the oil pump in real time; the one-way valve 12 is used to protect the oil pump 11 and avoid damage to the equipment caused by impact pressure.

[0030] Further, the power switch 16 is used to control the on-off of the total power supply of the equipment, the power indicator light 3 is turned on after the power supply is connected, and the phase sequence error indicator light 2 is turned on when the wiring phase sequence is wrong; the motor start button 17 and the motor stop button 18 are respectively used to control the start and stop of the motor 8, and realize the start-stop control of the equipment.

[0031] Further, the power switch 16 is used to control the on-off of the total power supply of the equipment, the power indicator light 3 is turned on after the power supply is connected, and the phase sequence error indicator light 2 is turned on when the wiring phase sequence is wrong; the motor start button 17 and the motor stop button 18 are respectively used to control the start and stop of the motor 8, and realize the start-stop control of the equipment.

[0032] It should be noted that the aforementioned laser particle counter is an online oil particulate contamination monitoring device developed using the light-blocking method (optical obstruction method). It is suitable for detecting solid particulate contamination in various oils such as hydraulic oil and lubricating oil, and can be widely used in multiple industrial fields such as aviation, aerospace, and petrochemicals. The instrument features fast detection speed, high accuracy, and good repeatability. It supports multiple contamination level standards (such as NAS1638, ISO4406, etc.) and can store data via USB flash drive or communicate and control via RS485 / RS232 interface. It has a user-friendly interface and automatic flow rate analysis function, making it suitable for online real-time monitoring and laboratory analysis.

[0033] When using the hydraulic oil cleaning machine, push it to the work site using handle 1 and ensure that the frame 21 is placed stably; check that the suction pipe 7 and the outlet pipe 14 are free from blockages or flattening, and ensure that the pipelines are clean and unobstructed; according to the hydraulic system interface, connect the suction pipe 7 to the outlet end of the hydraulic oil tank and the outlet pipe 14 to the return end of the hydraulic oil tank to complete the pipeline connection. Close the main power switch 16 and observe whether the power indicator light 3 lights up to confirm that the equipment is powered normally. If the phase sequence error indicator light 2 lights up, it means that the wiring phase sequence is incorrect. You need to immediately disconnect the main power switch 16, adjust the power phase sequence, and then close the main power switch 16 again until the phase sequence error indicator light 2 goes out and the power indicator light 3 lights up normally. Open the vent plug 6 at the top of the fine filter, slowly turn on the motor start button 17, so that the motor 8 drives the oil pump 11 to run slightly and expel the gas in the fine filter cartridge. After no more gas is discharged from the vent plug 6 and oil continues to flow out, close the vent plug 6. Using the control buttons on the particle counter 4 panel, set the detection parameters according to the actual working conditions and select the appropriate flow rate mode; observe the displayed value of the oil pump outlet pressure gauge 5 to ensure that the pressure is within the normal operating range of the equipment; Press the motor start button 17, the motor 8 drives the oil pump 11 to run, the oil enters the oil pump 11 through the oil suction pipe 7, and is delivered to the fine filter through the check valve 12. After being filtered by the high-precision filter element, it flows back to the hydraulic oil tank through the oil outlet pipe 14 to start the circulation filtration. During the filtration process, the return oil detection ball valve 19 is opened, and then the pre-filtration detection ball valve 13 and the post-filtration detection ball valve 15 are opened respectively. The cleanliness level of the oil before and after filtration is detected in real time by the particle counter 4. The operator judges the filtration effect based on the detection results. When the particle counter 4 shows that the oil cleanliness level meets the usage requirements, press the motor stop button 18 to turn off the motor 8 and oil pump 11; disconnect the main power switch 16 and close the pre-filter detection ball valve 13, post-filter detection ball valve 15 and detection return oil ball valve 19. If the filter element needs to be replaced, open the drain plug 20 to drain the dirty oil in the fine filter cartridge. Remove the old filter element and replace it with a new one through the quick-opening structure of the fine filter. After replacement, close the drain plug 20. Disassemble the suction pipe 7 and the outlet pipe 14, clean the residual oil in the pipes, and push the equipment to the designated storage location.

[0034] In summary, the integrated components form a compact, mobile hydraulic oil cleaning machine, achieving an integrated design for oil delivery, filtration, and cleanliness detection. The transmission connection between the motor 8 and the oil pump 11 provides stable power for oil flow. The series arrangement of the suction pipe 7, check valve 12, fine filter, and outlet pipe 14 ensures a smooth oil filtration path. The particle counter 4 is connected to the pipelines before and after filtration through the pre-filtration detection interface 9, the pre-filtration detection ball valve 13, and the post-filtration detection ball valve 15, respectively. With the return oil control of the detection return ball valve 19, it can completely cover the cleanliness monitoring of the entire oil filtration process, solving the problem of traditional oil filtration equipment having scattered functions and being unable to monitor the filtration effect in real time. At the same time, the integrated structure facilitates the overall movement of the equipment and adapts to the needs of multiple scenarios.

[0035] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0037] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A portable hydraulic oil cleaning machine characterized by: The utility model relates to a kind of integrated oil filter device, including frame (21), and handle (1) integratedly installed on the frame (21), phase sequence error indicator (2), power indicator (3), particle counter (4), oil pump outlet pressure gauge (5), exhaust block (6), oil suction pipe (7), motor (8), pre-filter detection interface (9), pressure gauge interface (10), oil pump (11), check valve (12), pre-filter detection ball valve (13), oil outlet pipe (14), post-filter detection ball valve (15), power supply master switch (16), motor start button (17), motor stop button (18), detection return oil ball valve (19) and oil drain block (20);The motor (8) is drivingly connected with oil pump (11), the oil suction pipe (7) is communicated with the oil inlet end of oil pump (11), the oil outlet end of oil pump (11) is sequentially connected with check valve (12), fine filter, the oil outlet pipe (14) is communicated with the oil outlet end of fine filter;The particle counter (4) is connected with the oil outlet end pipeline of oil pump (11) by pre-filter detection interface (9) and pre-filter detection ball valve (13), and is connected with the oil outlet end pipeline of fine filter by post-filter detection ball valve (15), and the detection return oil ball valve (19) is connected in the return oil pipeline of particle counter (4). The frame (21) is of corrosion-resistant treatment structure, the handle (1) is a hand-pushed moving gripper, the oil suction pipe (7) and the oil outlet pipe (14) are both of the structure form of hose and hard tube combination, which is convenient for adapting the connection requirement of different use scenes. The oil pump (11) is a gear delivery pump, which is internally integrated with a safety valve, and does not need to be additionally connected with a safety pipeline, and the motor (8) is a three-phase asynchronous motor, which cooperates with the oil pump (11) to realize the delivery and filtering power supply of oil.

2. The portable hydraulic oil cleaning machine of claim 1, wherein: The fine filter is of quick-opening structure design, internally assembled with high-precision filter element, the exhaust block (6) is arranged at the top of the fine filter, for discharging gas in the fine filter cylinder, and the oil drain block (20) is arranged at the bottom of the fine filter, for emptying dirty oil in the cylinder when replacing the filter element.

3. A portable hydraulic oil cleaning machine according to claim 2, wherein: The particle counter (4) is an online laser particle counter, the panel of which is provided with operation keys, supports multiple flow rate mode switching, and can realize real-time detection of the cleanliness grade of oil before and after filtering.

4. A portable hydraulic oil cleaning machine according to claim 3, wherein: The oil pump outlet pressure gauge (5) is communicated with the oil outlet end of the oil pump (11) through the pressure gauge interface (10), for displaying the pressure value of the oil outlet of the oil pump in real time, and the check valve (12) is used for protecting the oil pump (11) from damage caused by impact pressure.

5. A portable hydraulic oil cleaning machine as claimed in claim 4, wherein: The power supply master switch (16) is used for controlling the on-off of the total power supply of the equipment, the power indicator (3) is turned on after the power supply is connected, and the phase sequence error indicator (2) is turned on when the wiring phase sequence is wrong, the motor start button (17) and the motor stop button (18) are respectively used for controlling the start and stop of the motor (8), to realize the start and stop control of the equipment.

6. A portable hydraulic oil cleaning machine as claimed in claim 5, wherein: ​ 7. A portable hydraulic oil cleaning machine according to claim 6, wherein: ​

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