Hydraulic device with hydraulic oil capable of being circulated

Abstract

The utility model discloses a hydraulic device capable of circulating hydraulic oil, which relates to the field of hydraulic test stands and comprises an oil tank, an oil tank base fixedly mounted on the oil tank, an electric cabinet and pressure gauge component fixedly mounted on the oil tank, a manual overflow valve component movably mounted on the oil tank, and a first motor pump station fixedly mounted on the oil tank base. One end of a first oil conveying pipe is fixedly installed on the first motor pump station. According to the utility model, through the arrangement of structures such as the first motor pump station and the second motor pump station, the first motor pump station and the second motor pump station are utilized to establish required pressure under different working conditions, so that hydraulic oil drives various actuating mechanisms to complete corresponding actions, and meanwhile, the filter assemblies with different precisions from large to small are arranged; through circular flowing of the hydraulic oil, the hydraulic oil has self-cleaning capacity in the circulating process, the hydraulic oil can be reused, and through reuse of the hydraulic oil, the service life of the hydraulic oil is greatly prolonged, and repeated waste of the hydraulic oil is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic test benches, in particular to a hydraulic device with circulating hydraulic oil. Background Art

[0002] The hydraulic test bench is a device for performance detection and testing of hydraulic components or systems. It simulates the hydraulic state under different working conditions, including pressure, flow, temperature and vibration, so as to evaluate the performance, life and reliability of hydraulic systems or components, and provide basic data and performance evaluation for engineering design and optimization.

[0003] In the prior art, during the use of the hydraulic test bench, the hydraulic oil needs to pass through the hydraulic components and circulate. During the process, impurities are easily generated in the hydraulic oil, which affects the use effect and service life of the hydraulic oil. The hydraulic oil needs to be replaced, which increases the waste of hydraulic oil. Therefore, a hydraulic device with circulating hydraulic oil is needed to meet people's needs. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic device with circulating hydraulic oil, so as to solve the problem that the hydraulic oil of the hydraulic test bench proposed in the above background technology needs to pass through the hydraulic components and circulate during use, and impurities are easily generated in the hydraulic oil during the process, thereby affecting the use effect and service life of the hydraulic oil, and the hydraulic oil needs to be replaced, thereby increasing the waste of hydraulic oil.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic device in which hydraulic oil can be circulated, comprising an oil tank, an oil tank base is fixedly mounted on the oil tank, an electric cabinet and a pressure gauge assembly are fixedly mounted on the oil tank, a manual overflow valve assembly is movably mounted on the oil tank, a first motor pump station is fixedly mounted on the oil tank base, one end of a first oil pipeline is fixedly mounted on the first motor pump station, a connecting pipe is fixedly mounted on the other end of the first oil pipeline, one end of a first delivery pipe is fixedly mounted on the connecting pipe, a plurality of first high-pressure filter assemblies are fixedly mounted on the first delivery pipe, the first delivery pipe is connected to the first high-pressure filter assembly, and the first delivery pipe is connected to the first high-pressure filter assembly. A first connecting valve is fixedly installed on the other end of the pipe, one end of the first conversion pipe is fixedly installed on the connecting pipe, a first switching valve is fixedly installed on the other end of the first conversion pipe, a first circulation pipe is fixedly installed on the first switching valve, a first oil suction pipe is fixedly installed on the first motor pump station, a first oil suction pipe is fixedly installed on the first oil suction pipe, the first oil suction filter is fixedly installed on the oil tank, a second circulation pipe is fixedly installed on the first motor pump station, a second motor pump station is fixedly installed on the oil tank base, a second oil suction pipe is fixedly installed on the second motor pump station, a second oil suction pipe is fixedly installed on the second oil suction pipe, and a second oil suction filter is fixedly installed on the second oil suction filter. A third circulation pipe and a second oil delivery pipe are fixedly installed on the oil tank and the second motor pump station, a second delivery pipe is fixedly installed on the second oil delivery pipe, a plurality of second high-pressure filter components are fixedly installed on the second delivery pipe, a second connecting valve is fixedly installed on the second delivery pipe, one end of a second conversion pipe is fixedly installed on the second oil delivery pipe, a second switching valve is fixedly installed on the other end of the second conversion pipe, a fourth circulation pipe is fixedly installed on the second switching valve, an oil return filter is fixedly installed on the oil tank, one end of an oil return pipe is fixedly installed on the oil return filter, an oil return valve joint is fixedly installed on the other end of the oil return pipe, and a first oil inlet valve is fixedly installed on the inner wall of the oil tank. pipe, a second oil inlet pipe, a third oil inlet pipe, a fourth oil inlet pipe, a fifth oil inlet pipe and a sixth oil inlet pipe, the first oil inlet pipe is fixedly installed with a fifth mounting valve, the fifth mounting valve is fixedly installed at one end of the second circulation pipe, the second oil inlet pipe is fixedly installed with a first mounting valve, the first mounting valve is fixedly installed at one end of the first circulation pipe, the fifth oil inlet pipe is fixedly installed with a fourth mounting valve, the fourth mounting valve is fixedly installed on the third circulation pipe, the fourth oil inlet pipe is fixedly installed with a third mounting valve, the third mounting valve is fixedly installed on the fourth circulation pipe, the third oil inlet pipe and the sixth oil inlet pipe are both fixedly installed with the second mounting valve, and a partition is fixedly installed on the inner wall of the oil tank.

[0006] Preferably, a fuel tank inspection cover is movably mounted on the fuel tank, and a fuel filling port is movably mounted on the fuel tank inspection cover.

[0007] Preferably, four fuel tank handles are fixedly installed on the top side of the fuel tank, and two liquid level gauges are fixedly installed on one side of the fuel tank.

[0008] Preferably, a plurality of oil pans are installed on the oil tank base, and the first mounting valve, the second mounting valve, the third mounting valve, the fourth mounting valve and the fifth mounting valve are all located on the top side of the oil pans.

[0009] Preferably, one end of a connecting pipe is fixedly mounted on the oil tank, and the other end of the connecting pipe is fixedly mounted with a transparent organic glass test component.

[0010] The beneficial effects of the utility model are:

[0011] In the utility model, through the arrangement of the first motor pump station, the second motor pump station and other structures, the first motor pump station and the second motor pump station are utilized to establish the required pressure under different working conditions, so that the hydraulic oil drives various actuators to complete corresponding actions, and at the same time, filter components of different precisions from large to small are arranged, and through the circulation of the hydraulic oil, the hydraulic oil is made to have self-purification ability during the circulation process, so that the hydraulic oil can be reused, and through the reuse of the hydraulic oil, the service life and repeated waste of the hydraulic oil are greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a hydraulic device with circulating hydraulic oil proposed by the utility model;

[0013] Figure 2 This is a side structural schematic diagram of a hydraulic device with circulating hydraulic oil proposed by the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the second motor pump station of a hydraulic device with circulating hydraulic oil proposed by the utility model;

[0015] Figure 4 This is a structural schematic diagram of a second oil suction filter part of a hydraulic device with circulating hydraulic oil proposed by the utility model;

[0016] Figure 5 This is a schematic diagram of the structure inside the oil tank of a hydraulic device with circulating hydraulic oil proposed by the utility model;

[0017] Figure 6 The utility model discloses a structural schematic diagram of a first oil inlet pipe portion of a hydraulic device in which hydraulic oil can circulate.

[0018] In the figure: 100, oil tank; 101, oil tank base; 102, oil basin; 103, electric cabinet; 104, pressure gauge assembly; 105, oil tank detection cover; 106, refueling port; 107, manual overflow valve assembly; 108, oil tank handle; 109, liquid level gauge; 200, first motor pump station; 201, first oil delivery pipe; 202, connecting pipe; 203, first delivery pipe; 204, first high-pressure filter assembly; 205, first connecting valve; 206, first conversion pipe; 207, first switching valve; 208, first circulation pipe; 209, first oil suction pipe; 210, first oil suction filter; 211, second circulation pipe; 300, second motor pump station; 301, second oil suction pipe; 302, second oil suction filter; 30 3. The third circulation pipe; 304. The second oil delivery pipe; 305. The second delivery pipe; 306. The second high-pressure filter assembly; 307. The second connecting valve; 308. The second conversion pipe; 309. The second switching valve; 310. The fourth circulation pipe; 311. The return oil filter; 312. The return oil pipe; 313. The return oil valve joint; 400. The connecting pipe; 401. The organic glass transparent test assembly; 402. The first oil inlet pipe; 403. The second oil inlet pipe; 404. The third oil inlet pipe; 405. The fourth oil inlet pipe; 406. The fifth oil inlet pipe; 407. The sixth oil inlet pipe; 408. The first installation valve; 409. The second installation valve; 410. The partition; 411. The third installation valve; 412. The fourth installation valve; 413. The fifth installation valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-6A hydraulic device in which hydraulic oil can circulate, comprising an oil tank 100, an oil tank base 101 fixedly mounted on the oil tank 100, an electric cabinet 103 and a pressure gauge assembly 104 fixedly mounted on the oil tank 100, a manual overflow valve assembly 107 movably mounted on the oil tank 100, a first motor pump station 200 fixedly mounted on the oil tank base 101, one end of a first oil delivery pipe 201 fixedly mounted on the first motor pump station 200, a connecting pipe 202 fixedly mounted on the other end of the first oil delivery pipe 201, one end of a first delivery pipe 203 fixedly mounted on the connecting pipe 202, a plurality of first high-pressure filter assemblies 204 fixedly mounted on the first delivery pipe 203, the first delivery pipe 203 being connected to the first high-pressure filter assemblies 204, and the first delivery pipe 202 being connected to the first high-pressure filter assemblies 204. The other end of the first motor pump station 200 is fixedly installed with a first connecting valve 205, one end of the first conversion pipe 206 is fixedly installed on the connecting pipe 202, the other end of the first conversion pipe 206 is fixedly installed with a first switching valve 207, the first switching valve 207 is fixedly installed with a first circulation pipe 208, the first motor pump station 200 is fixedly installed with a first oil suction pipe 209, the first oil suction pipe 209 is fixedly installed with a first oil suction filter 210, the first oil suction filter 210 is fixedly installed on the oil tank 100, the first motor pump station 200 is fixedly installed with a second circulation pipe 211, the second motor pump station 300 is fixedly installed on the oil tank base 101, the second motor pump station 300 is fixedly installed with a second oil suction pipe 301, and the second oil suction pipe 301 is fixedly installed with a second oil suction filter 210. A second oil suction filter 302 is installed, and the second oil suction filter 302 is fixedly installed on the oil tank 100. A third circulation pipe 303 and a second oil delivery pipe 304 are fixedly installed on the second motor pump station 300. A second delivery pipe 305 is fixedly installed on the second oil delivery pipe 304. A plurality of second high-pressure filter assemblies 306 are fixedly installed on the second delivery pipe 305. A second connecting valve 307 is fixedly installed on the second delivery pipe 305. One end of a second conversion pipe 308 is fixedly installed on the second oil delivery pipe 304. A second switching valve 309 is fixedly installed on the other end of the second conversion pipe 308. A fourth circulation pipe 310 is fixedly installed on the second switching valve 309. A return oil filter 311 is fixedly installed on the oil tank 100. One end of the return oil pipe 312 is fixedly installed, and the other end of the return oil pipe 312 is fixedly installed with a return oil valve joint 313. The inner wall of the oil tank 100 is fixedly installed with a first oil inlet pipe 402, a second oil inlet pipe 403, a third oil inlet pipe 404, a fourth oil inlet pipe 405, a fifth oil inlet pipe 406 and a sixth oil inlet pipe 407. The first oil inlet pipe 402 is fixedly installed with a fifth installation valve 413, and the fifth installation valve 413 is fixedly installed at one end of the second circulation pipe 211. The second oil inlet pipe 403 is fixedly installed with a first installation valve 408, and the first installation valve 408 is fixedly installed at one end of the first circulation pipe 208. The fifth oil inlet pipe 406 is fixedly installed with a fourth installation valve 412, and the fourth installation valve 412 is fixedly installed on the third circulation pipe 303.A third installation valve 411 is fixedly installed on the fourth oil inlet pipe 405, and the third installation valve 411 is fixedly installed on the fourth circulation pipe 310. The third oil inlet pipe 404 and the sixth oil inlet pipe 407 are both fixedly installed with a second installation valve 409. A partition plate 410 is fixedly installed on the inner wall of the oil tank 100. When in use, the hydraulic component to be tested can be connected to the first connecting valve 205 and the return oil valve joint 313, and the first motor pump station 200 is opened. The first motor pump station 200 uses the first oil suction pipe 209 to extract the hydraulic oil in the oil tank 100. During the process, the oil will be initially filtered by the first oil suction filter 210, and then the oil will be transported to the first delivery pipe 203 through the first oil delivery pipe 201 and the connecting pipe 202. After passing through multiple After filtering by the first high-pressure filter assembly 204, the oil enters the hydraulic element through the first connecting valve 205. When refluxing, the oil in the hydraulic element returns to the oil tank 100 through the return oil pipe 312 for circulation. When refluxing, it will be filtered through the return oil filter 311, or the hydraulic element is connected to the second connecting valve 307 and the return oil valve joint 313 for testing. At this time, the second motor pump station 300 is opened, and the second motor pump station 300 will use the second oil suction pipe 301 to extract the oil in the oil tank 100, and use the second oil suction filter 302 for preliminary filtering, and then it is transported to the second delivery pipe 305 through the second oil delivery pipe 304, and after being filtered by multiple second high-pressure filter assemblies 306, it enters the hydraulic element through the second connecting valve 307. When the oil returns, it returns to the oil tank 100 through the return oil pipe 312. By connecting the hydraulic components to pipelines of different thicknesses, the speed and pressure of the oil flow can be changed, and the hydraulic components can be simulated in different hydraulic environments, including pressure, flow, temperature, etc. The device also supports self-filtration of the hydraulic oil. The first connecting valve 205 and the second connecting valve 307 can be connected to the return oil valve joint 313 by pipelines to make the hydraulic oil self-circulate for filtration, and by opening the fifth installation valve 413, the first motor pump station 200 can extract hydraulic oil through the first oil inlet pipe 402 for transportation, and when the first installation valve 408 is opened, the hydraulic oil can be extracted through the second oil inlet pipe 403, so that the hydraulic oil passes through the first circulation The annular pipe 208 circulates, and at the same time, the first switching valve 207 is opened. At this time, the hydraulic oil will enter the first delivery pipe 203 through the first switching valve 207 and the first conversion pipe 206, and finally flow to the hydraulic element through the first connecting valve 205. When the third installation valve 411 is opened, the second motor pump station 300 can use the fourth oil inlet pipe 405 to extract hydraulic oil, and then transport it through the fourth circulation pipe 310. At the same time, the second switching valve 309 is opened, so that the hydraulic oil can be transported to the second oil delivery pipe 304 and the second delivery pipe 305 through the second conversion pipe 308, and finally flow to the hydraulic element through the second connecting valve 307. When the fourth installation valve 412 is opened, the second motor pump station 300 can use the fifth oil inlet pipe 406 to extract hydraulic oil.Furthermore, the pipelines of the first motor pump station 200 and the second motor pump station 300 can be connected to the two second installation valves 409 respectively, and the third oil inlet pipe 404 or the sixth oil inlet pipe 407 can be used for extraction. By setting the first oil inlet pipe 402, the second oil inlet pipe 403, the third oil inlet pipe 404, the fourth oil inlet pipe 405, the fifth oil inlet pipe 406 and the sixth oil inlet pipe 407 to different thicknesses and lengths, different flow rates and pressure bearing capacities can be achieved to meet different testing requirements. The oil leaked during the circulation of hydraulic oil can be collected by the oil basin 102 to reduce waste.

[0021] Furthermore, a fuel tank inspection cover 105 is movably mounted on the fuel tank 100 , and a refueling port 106 is movably mounted on the fuel tank inspection cover 105 . By opening the fuel tank inspection cover 105 , hydraulic oil can be conveniently added into the fuel tank 100 .

[0022] Furthermore, four tank handles 108 are fixedly installed on the top side of the tank 100 , and two liquid level gauges 109 are fixedly installed on one side of the tank 100 , so that the liquid level in the tank 100 can be easily checked by using the liquid level gauges 109 .

[0023] Furthermore, a plurality of oil pans 102 are installed on the oil tank base 101, and the first mounting valve 408, the second mounting valve 409, the third mounting valve 411, the fourth mounting valve 412 and the fifth mounting valve 413 are all located on the top side of the oil pan 102. The oil pan 102 can be used to conveniently collect residual oil for secondary use.

[0024] Furthermore, one end of a connecting pipe 400 is fixedly mounted on the oil tank 100 , and the other end of the connecting pipe 400 is fixedly mounted with a transparent organic glass test component 401 .

[0025] Working principle of this utility model:

[0026] When in use, the hydraulic component to be tested can be connected to the first connecting valve 205 and the return oil valve connector 313, and the first motor pump station 200 can be opened. The first motor pump station 200 uses the first oil suction pipe 209 to extract the hydraulic oil in the oil tank 100. During the process, the oil will be initially filtered by the first oil suction filter 210, and then the oil will be transported to the first delivery pipe 203 through the first oil delivery pipe 201 and the connecting pipe 202. After being filtered by multiple first high-pressure filter components 204, the oil enters the hydraulic component through the first connecting valve 205. When refluxing, the oil in the hydraulic component will return to the oil tank 100 through the return oil pipe 312 for circulation. When refluxing, it will be filtered through the return oil filter 311, or the hydraulic component The second connecting valve 307 is connected to the oil return valve connector 313 for testing. At this time, the second motor pump station 300 is turned on. The second motor pump station 300 will use the second oil suction pipe 301 to extract the oil in the oil tank 100, and use the second oil suction filter 302 for preliminary filtration. Then, the oil is transported to the second delivery pipe 305 through the second oil delivery pipe 304, and after being filtered by multiple second high-pressure filter components 306, it enters the hydraulic element through the second connecting valve 307. When returning the oil, it returns to the oil tank 100 through the return oil pipe 312. By connecting the hydraulic element to pipelines of different coarseness, the speed and pressure of the oil flow can be changed, and the hydraulic element can be simulated under different hydraulic conditions, including pressure, flow, etc. The device also supports self-filtration of the hydraulic oil. The first connecting valve 205 and the second connecting valve 307 can be connected to the return oil valve joint 313 by a pipeline to make the hydraulic oil self-circulate for filtration. By opening the fifth installation valve 413, the first motor pump station 200 can extract the hydraulic oil through the first oil inlet pipe 402 for delivery. When the first installation valve 408 is opened, the hydraulic oil can be extracted through the second oil inlet pipe 403, so that the hydraulic oil circulates through the first circulation pipe 208. At the same time, when the first switching valve 207 is opened, the hydraulic oil will enter the first delivery pipe 203 through the first switching valve 207 and the first conversion pipe 206, and finally flow to the hydraulic element through the first connecting valve 205. When the third installation valve 411 is opened, the second motor pump station 300 can use the fourth oil inlet pipe 405 to extract hydraulic oil, and then transport it through the fourth circulation pipe 310. At the same time, the second switching valve 309 is opened to allow the hydraulic oil to be transported to the second oil delivery pipe 304 and the second delivery pipe 305 through the second conversion pipe 308, and finally flow to the hydraulic element through the second connecting valve 307. When the fourth installation valve 412 is opened, the second motor pump station 300 can use the fifth oil inlet pipe 406 to extract hydraulic oil, and the pipelines of the first motor pump station 200 and the second motor pump station 300 can also be connected to the two second installation valves 409 respectively, and the third oil inlet pipe 404 or the sixth oil inlet pipe 407 is used for extraction.By setting the first oil inlet pipe 402, the second oil inlet pipe 403, the third oil inlet pipe 404, the fourth oil inlet pipe 405, the fifth oil inlet pipe 406 and the sixth oil inlet pipe 407 to different thicknesses and lengths, they can have different flow rates and pressure tolerances to meet different testing requirements. The oil leaked during the circulation of hydraulic oil can be collected by the oil basin 102 to reduce waste.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic device with circulating hydraulic oil, comprising an oil tank (100), characterized in that: The oil tank (100) is fixedly mounted with an oil tank base (101), an electric cabinet (103) and a pressure gauge assembly (104) are fixedly mounted on the oil tank (100), a manual overflow valve assembly (107) is movably mounted on the oil tank (100), a first motor pump station (200) is fixedly mounted on the oil tank base (101), one end of a first oil delivery pipe (201) is fixedly mounted on the first motor pump station (200), a connecting pipe (202) is fixedly mounted on the other end of the first oil delivery pipe (201), one end of a first delivery pipe (203) is fixedly mounted on the connecting pipe (202), a plurality of first high-pressure filter assemblies (204) are fixedly mounted on the first delivery pipe (203), and the first delivery pipe (203) and the first high-pressure filter assemblies are connected to each other. (204), the other end of the first delivery pipe (203) is fixedly mounted with a first connecting valve (205), one end of a first conversion pipe (206) is fixedly mounted on the connecting pipe (202), the other end of the first conversion pipe (206) is fixedly mounted with a first switching valve (207), a first circulation pipe (208) is fixedly mounted on the first switching valve (207), a first oil suction pipe (209) is fixedly mounted on the first motor pump station (200), a first oil suction filter (210) is fixedly mounted on the first oil suction pipe (209), the first oil suction filter (210) is fixedly mounted on the oil tank (100), a second circulation pipe (211) is fixedly mounted on the first motor pump station (200), and a second oil suction filter (211) is fixedly mounted on the oil tank base (101). A second motor pump station (300) is installed, a second oil suction pipe (301) is fixedly installed on the second motor pump station (300), a second oil suction filter (302) is fixedly installed on the second oil suction pipe (301), the second oil suction filter (302) is fixedly installed on the oil tank (100), a third circulation pipe (303) and a second oil delivery pipe (304) are fixedly installed on the second motor pump station (300), a second delivery pipe (305) is fixedly installed on the second oil delivery pipe (304), a plurality of second high-pressure filter assemblies (306) are fixedly installed on the second delivery pipe (305), a second connecting valve (307) is fixedly installed on the second delivery pipe (305), and a second conversion pipe (308) is fixedly installed on the second oil delivery pipe (304). an end of the second conversion pipe (308), a second switching valve (309) is fixedly mounted on the other end of the second conversion pipe (308), a fourth circulation pipe (310) is fixedly mounted on the second switching valve (309), an oil return filter (311) is fixedly mounted on the oil tank (100), one end of an oil return pipe (312) is fixedly mounted on the oil return filter (311), an oil return valve joint (313) is fixedly mounted on the other end of the oil return pipe (312), a first oil inlet pipe (402), a second oil inlet pipe (403), a third oil inlet pipe (404), a fourth oil inlet pipe (405), a fifth oil inlet pipe (406) and a sixth oil inlet pipe (407) are fixedly mounted on the inner wall of the oil tank (100), a fifth installation valve (413) is fixedly mounted on the first oil inlet pipe (402),The fifth installation valve (413) is fixedly installed on one end of the second circulation pipe (211), the first installation valve (408) is fixedly installed on the second oil inlet pipe (403), the first installation valve (408) is fixedly installed on one end of the first circulation pipe (208), the fourth installation valve (412) is fixedly installed on the fifth oil inlet pipe (406), the fourth installation valve (412) is fixedly installed on the third circulation pipe (303), the third installation valve (411) is fixedly installed on the fourth oil inlet pipe (405), the third installation valve (411) is fixedly installed on the fourth circulation pipe (310), the second installation valve (409) is fixedly installed on the third oil inlet pipe (404) and the sixth oil inlet pipe (407), and a partition plate (410) is fixedly installed on the inner wall of the oil tank (100).

2. A hydraulic device with circulating hydraulic oil according to claim 1, characterized in that: A fuel tank detection cover (105) is movably mounted on the fuel tank (100), and a fuel filling port (106) is movably mounted on the fuel tank detection cover (105).

3. A hydraulic device with circulating hydraulic oil according to claim 1, characterized in that: Four oil tank handles (108) are fixedly installed on the top side of the oil tank (100), and two liquid level gauges (109) are fixedly installed on one side of the oil tank (100).

4. A hydraulic device with circulating hydraulic oil according to claim 1, characterized in that: A plurality of oil pans (102) are installed on the oil tank base (101), and a first installation valve (408), a second installation valve (409), a third installation valve (411), a fourth installation valve (412) and a fifth installation valve (413) are all located on the top side of the oil pans (102).

5. The hydraulic device with circulating hydraulic oil according to claim 1, characterized in that: One end of a connecting pipe (400) is fixedly mounted on the oil tank (100), and the other end of the connecting pipe (400) is fixedly mounted with a transparent organic glass test assembly (401).

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