阅读说明：本技术 一种具有外置过滤结构的液压油箱 (Hydraulic oil tank with external filtering structure ) 是由 周秀明 于 2019-12-18 设计创作，主要内容包括：本发明公开了一种具有外置过滤结构的液压油箱,包括液压油箱、连接件、第一螺栓、第二螺栓、第二密封胶垫和排油口,所述液压油箱底部外侧设置有托架,且液压油箱与托架之间设置有橡胶垫,所述连接件贯穿液压油箱与托架相连接,且连接件设置在液压油箱下端外侧,所述第一螺栓贯穿箱盖与液压油箱相连接,且箱盖设置在液压油箱上方。该具有外置过滤结构的液压油箱,设置有通油管、齿轮泵和滤芯,启动齿轮泵,齿轮泵抽取油箱内的液压油箱内的油液进入通油管,滤芯过滤油液,使杂质停留在滤芯内部,过滤后的油液经过通油管下端回到液压油箱,关闭两个控制阀,转动取下第二端盖,取出滤芯,便于清理杂质,使液压油箱内的油液保持清洁。(The invention discloses a hydraulic oil tank with an external filtering structure, which comprises a hydraulic oil tank, a connecting piece, a first bolt, a second sealing rubber gasket and an oil outlet, wherein a bracket is arranged on the outer side of the bottom of the hydraulic oil tank, a rubber gasket is arranged between the hydraulic oil tank and the bracket, the connecting piece penetrates through the hydraulic oil tank and is connected with the bracket, the connecting piece is arranged on the outer side of the lower end of the hydraulic oil tank, the first bolt penetrates through a tank cover and is connected with the hydraulic oil tank, and the tank cover is arranged above the hydraulic oil tank. This hydraulic tank with external filtration is provided with logical oil pipe, gear pump and filter core, starts the gear pump, and fluid in the hydraulic tank in the gear pump extraction oil tank gets into logical oil pipe, and the filter core filters fluid, makes impurity stop inside the filter core, and the fluid after the filtration gets back to hydraulic tank through leading to the oil pipe lower extreme, closes two control valves, rotates and takes off the second end cover, takes out the filter core, is convenient for clear up impurity, makes the fluid in the hydraulic tank keep clean.)

1. The utility model provides a hydraulic tank with external filtration, includes hydraulic tank (1), connecting piece (4), first bolt (5), second bolt (10), the sealed cushion of second (12) and oil drain port (20), its characterized in that: the hydraulic oil tank is characterized in that a bracket (2) is arranged on the outer side of the bottom of the hydraulic oil tank (1), a rubber pad (3) is arranged between the hydraulic oil tank (1) and the bracket (2), a connecting piece (4) penetrates through the hydraulic oil tank (1) to be connected with the bracket (2), the connecting piece (4) is arranged on the outer side of the lower end of the hydraulic oil tank (1), a first bolt (5) penetrates through a tank cover (6) to be connected with the hydraulic oil tank (1), the tank cover (6) is arranged above the hydraulic oil tank (1), a first sealing rubber gasket (7) is arranged on the top of the hydraulic oil tank (1), the first sealing rubber gasket (7) is arranged between the hydraulic oil tank (1) and the tank cover (6), an oil overflow tank (8) is arranged on the left side of the hydraulic oil tank (1), a threaded sleeve (9) is arranged inside the oil overflow tank (8), and a second bolt (10) penetrates through the threaded, the screw sleeve (9) is arranged on the outer side of the overflow valve (11), the overflow valve (11) is arranged on the top of the left side of the hydraulic oil tank (1), the upper end of the overflow valve (11) penetrates through the oil overflow tank (8), the second sealing rubber gasket (12) is arranged on the outer side of the overflow valve (11), the second sealing rubber gasket (12) is arranged between the hydraulic oil tank (1) and the oil overflow tank (8), the top of the left side of the oil overflow tank (8) is provided with a first air filter (13), the surface of the tank cover (6) is penetrated with an oil return pipe (14), an oil suction pipe (15), an oil filling port (16) and a second air filter (17), the oil return pipe (14) is arranged on the right front side of the tank cover (6), the oil suction pipe (15) is arranged on the left rear side of the tank cover (6), the bottom of the oil suction pipe (15) is provided with an oil filter (18), the right side of, a second air filter (17) is arranged in the middle of the box cover (6), a partition plate (19) is arranged inside the hydraulic oil tank (1), the partition plate (19) is arranged between the oil suction pipe (15) and the oil return pipe (14), the oil discharge port (20) is arranged at the bottom of the rear end of the hydraulic oil tank (1), a first end cover (21) is arranged at the rear end of the oil discharge port (20), a water cooling pipe (22) penetrates through the partition plate (19), two ends of the water cooling pipe (22) are respectively connected with the water tank (23) and the water pump (24), the water tank (23) is arranged on the right side of the hydraulic oil tank (1), the water pump (24) and the resistance heater (25) are arranged inside the water tank (23), the resistance heater (25) is arranged above the water pump (24), an exhaust fan (26) is arranged on the right side of the water tank (23), and the water tank (23) and the oil overflow tank (8) are both arranged above, hydraulic tank (1) front side is provided with leads to oil pipe (27), and leads to oil pipe (27) about both ends all be connected with hydraulic tank (1) front side, both ends all are provided with control valve (28) with hydraulic tank (1) junction about leading to oil pipe (27), and lead to inside gear pump (29) and the filter core (30) of being provided with of oil pipe (27), gear pump (29) set up in filter core (30) top, lead to oil pipe (27) lower extreme and second end cover (31) and be connected.

2. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the bottom of the hydraulic oil tank (1) is obliquely arranged, an oil discharge port (20) is arranged at the lowest point of the bottom of the hydraulic oil tank (1), and the oil discharge port (20) is arranged at the rear side of the left side partition plate (19).

3. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the connecting mode of the connecting piece (4) and the bracket (2) is threaded connection, and the connecting mode of the connecting piece (4) and the hydraulic oil tank (1) is sliding connection.

4. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the first bolt (5) is uniformly arranged on the outer side of the box cover (6), the first bolt (5) is in threaded connection with the hydraulic oil tank (1), and meanwhile the hydraulic oil tank (1) and the box cover (6) are in sealing connection through the first sealing rubber gasket (7).

5. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the oil overflow tank (8) is in sealed connection with the hydraulic oil tank (1) through a second sealing rubber gasket (12).

6. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the second bolt (10) is connected with the threaded sleeve (9) in a sliding mode, the second bolt (10) is connected with the hydraulic oil tank (1) in a threaded mode, and the second bolt (10) is arranged in a shape like a Chinese character 'kou' by taking the overflow valve (11) as the center.

7. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the two partition plates (19) are arranged, the two partition plates (19) are respectively connected with the inner walls of the front end and the rear end of the hydraulic oil tank (1), and the lower ends of the two partition plates (19) are connected with the bottom of the hydraulic oil tank (1).

8. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: the outer end of the filter element (30) is attached to the inner wall of the oil pipe (27), the lower end of the filter element (30) is fixed to the top of the second end cover (31), and meanwhile the lowest end of the filter element (30) is located below the joint of the oil pipe (27) and the hydraulic oil tank (1).

9. A hydraulic oil tank with an external filter structure as claimed in claim 1, characterized in that: an installation and disassembly structure is formed between the second end cover (31) and the oil pipe (27), and the second end cover (31) is in sealing connection with the oil pipe (27).

Technical Field

The invention relates to the technical field of hydraulic oil tanks, in particular to a hydraulic oil tank with an external filtering structure.

Background

The hydraulic oil tank is a container for storing oil required for ensuring the operation of a hydraulic system, and also plays roles of heat dissipation of the oil, air escape from the oil, and the like.

The existing hydraulic oil tank only can play a role in precipitating impurities, after a hydraulic system runs for a long time, a large amount of impurities are accumulated in the oil tank, so that the running efficiency of the hydraulic system is gradually reduced, the existing hydraulic oil tank is preheated in a cold environment in an idling mode of an engine, the preheating mode has high energy consumption and low efficiency, the temperature of oil cannot be quickly and effectively improved, and the existing hydraulic oil tank can generate oil spill under the conditions of misoperation and the like, the reason is that the oil is discharged by an overflow valve to avoid cylinder explosion, but the discharged oil can pollute the surrounding environment, the exposed oil can also have certain potential safety hazards, the bottom of the existing hydraulic oil tank is flat, when the oil is replaced, as the oil has certain viscosity, a part of the oil is easy to remain at the bottom of the hydraulic oil tank, the oil needs to be manually cleaned, the use is very inconvenient, and aiming at the problems, improvements to existing equipment are needed.

Disclosure of Invention

The invention aims to provide a hydraulic oil tank with an external filtering structure, which aims to solve the problems that the existing hydraulic oil tank in the prior art only can play a role of precipitating impurities, after a hydraulic system runs for a long time, a large amount of impurities are accumulated in the oil tank, so that the running efficiency of the hydraulic system is gradually reduced, the existing hydraulic oil tank is preheated in a cold environment in an engine idling mode, the preheating mode has high energy consumption and low efficiency and cannot quickly and effectively improve the temperature of oil, and the existing hydraulic oil tank can generate oil spilling under the conditions of misoperation and the like because the oil discharged by an overflow valve can avoid cylinder explosion, but the discharged oil can pollute the surrounding environment, the exposed oil has certain potential safety hazard, the bottom of the existing hydraulic oil tank is flat, and when the oil is replaced, as the oil has certain viscosity, a part of the oil is easy to remain at the bottom of the hydraulic oil tank, the cleaning is required to be carried out manually.

In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic oil tank with an external filtering structure comprises a hydraulic oil tank, a connecting piece, a first bolt, a second sealing rubber gasket and an oil discharge port, wherein a bracket is arranged on the outer side of the bottom of the hydraulic oil tank, a rubber gasket is arranged between the hydraulic oil tank and the bracket, the connecting piece penetrates through the hydraulic oil tank and is connected with the bracket, the connecting piece is arranged on the outer side of the lower end of the hydraulic oil tank, the first bolt penetrates through a tank cover and is connected with the hydraulic oil tank, the tank cover is arranged above the hydraulic oil tank, the top of the hydraulic oil tank is provided with the first sealing rubber gasket, the first sealing rubber gasket is arranged between the hydraulic oil tank and the tank cover, the left side of the hydraulic oil tank is provided with an oil overflow tank, a screw sleeve is arranged inside the oil overflow tank, the second bolt penetrates through the screw sleeve and is connected with the top of the hydraulic oil, the upper end of the overflow valve penetrates through an oil overflow tank, a second sealing rubber gasket is arranged outside the overflow valve and between a hydraulic oil tank and the oil overflow tank, a first air filter is arranged at the top of the left side of the oil overflow tank, an oil return pipe, an oil suction pipe, an oil filling port and a second air filter penetrate through the surface of the tank cover, the oil return pipe is arranged on the right front side of the tank cover, the oil suction pipe is arranged at the left rear side of the tank cover, an oil filter is arranged at the bottom of the oil suction pipe, the oil filling port is arranged at the right side of the tank cover, a second air filter is arranged in the middle of the tank cover, a partition plate is arranged inside the hydraulic oil tank and between the oil suction pipe and the oil return pipe, the oil discharge port is arranged at the bottom of the rear end of the hydraulic oil tank, a first end cover is arranged at the rear end of the oil discharge port, a water cooling pipe penetrates, the water tank is arranged on the right side of the hydraulic oil tank, the water tank is internally provided with a water pump and a resistance heater, the resistance heater is arranged above the water pump, the right side of the water tank is provided with an exhaust fan, the water tank and the oil overflow tank are arranged above the bracket, the front side of the hydraulic oil tank is provided with an oil through pipe, the upper end and the lower end of the oil through pipe are connected with the front side of the hydraulic oil tank, the upper end and the lower end of the oil through pipe are provided with control valves, a gear pump and a filter element are arranged inside the oil through pipe, the gear pump is arranged above the filter element, and the lower end of the

Preferably, the bottom of the hydraulic oil tank is obliquely arranged, an oil discharge port is arranged at the lowest point of the bottom of the hydraulic oil tank, and the oil discharge port is arranged at the rear side of the left side partition plate.

Preferably, the connecting piece is connected with the bracket in a threaded manner, and the connecting piece is connected with the hydraulic oil tank in a sliding manner.

Preferably, the first bolts are uniformly arranged on the outer side of the box cover, the first bolts are in threaded connection with the hydraulic oil tank, and the hydraulic oil tank is in sealing connection with the box cover through the first sealing rubber gasket.

Preferably, the oil spilling box is in sealing connection with the hydraulic oil tank through a second sealing rubber gasket.

Preferably, the second bolt is connected with the threaded sleeve in a sliding mode, the second bolt is connected with the hydraulic oil tank in a threaded mode, and the second bolt is arranged in a shape like a Chinese character 'kou' by taking the overflow valve as the center.

Preferably, the number of the partition plates is two, the two partition plates are respectively connected with the inner walls of the front end and the rear end of the hydraulic oil tank, and the lower ends of the two partition plates are connected with the bottom of the hydraulic oil tank.

Preferably, the outer end of the filter element is attached to the inner wall of the oil pipe, the lower end of the filter element is fixed to the top of the second end cover, and the lowest end of the filter element is located below the joint of the oil pipe and the hydraulic oil tank.

Preferably, an installation and disassembly structure is formed between the second end cover and the oil pipe, and the second end cover is in sealing connection with the oil pipe.

Compared with the prior art, the invention has the beneficial effects that: the hydraulic oil tank with the external filtering structure,

(1) the hydraulic oil tank is connected with the bracket in a sliding manner through the connecting piece, the rubber pad between the hydraulic oil tank and the bracket plays a role in vibration reduction, and the bracket is raised above the hydraulic oil tank, so that a gap is formed at the bottom of the hydraulic oil tank, and the hydraulic oil tank is convenient to dissipate heat;

(2) the oil overflow tank is fixedly fastened with the hydraulic oil tank by the second bolt, and when the overflow valve discharges oil and releases pressure, oil enters the oil overflow tank, so that the oil leakage is avoided from polluting the surrounding environment, and the exposed oil is prevented from deflagrating due to open fire;

(3) the hydraulic oil tank is provided with a water cooling pipe, a water tank and a resistance heater, wherein the resistance heater is arranged in the water tank, when preheating is needed, the resistance heater heats water in the water tank, a water pump pumps hot water into the water cooling pipe, when cooling is needed, an exhaust fan is started or the temperature of the water in the water tank is reduced by putting ice blocks, and the water pump pumps cold water into the water cooling pipe, so that the temperature of the hydraulic oil tank can be adjusted quickly, and meanwhile, the hydraulic oil tank is low in energy consumption and high in efficiency;

(4) the oil drain port and the first end cover are arranged, the first end cover is opened, the oil drain port is positioned at the lowest end in the hydraulic oil tank, the diameter of the oil drain port is larger than the thickness of the partition plate, oil on two sides of the partition plate leaves the hydraulic oil tank through the oil drain port, and the oil is more conveniently drained from the bottom of the obliquely arranged oil tank;

(5) be provided with logical oil pipe, gear pump and filter core, start the gear pump, fluid in the hydraulic tank in the gear pump extraction oil tank gets into logical oil pipe, and the filter core filters fluid, makes impurity stop inside the filter core, and the fluid after the filtration gets back to hydraulic tank through leading to the oil pipe lower extreme, closes two control valves, rotates and takes off the second end cover, takes out the filter core, and the clearance impurity of being convenient for makes the fluid in the hydraulic tank keep clean.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic top view of the cross-sectional structure of the present invention;

FIG. 3 is a schematic cross-sectional front view of the present invention;

FIG. 4 is a schematic diagram of a right side view cross-sectional structure of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 6 is a schematic top sectional view of an oil spill container according to the present invention;

FIG. 7 is a schematic diagram of the right side view cross-section structure of the oil pipe of the present invention.

In the figure: 1. the hydraulic oil tank comprises a hydraulic oil tank body, 2, a bracket, 3, a rubber gasket, 4, a connecting piece, 5, a first bolt, 6, a tank cover, 7, a first sealing rubber gasket, 8, an oil spilling tank, 9, a threaded sleeve, 10, a second bolt, 11, an overflow valve, 12, a second sealing rubber gasket, 13, a first air filter, 14, an oil return pipe, 15, an oil suction pipe, 16, an oil filling port, 17, a second air filter, 18, an oil filter, 19, a partition plate, 20, an oil discharge port, 21, a first end cover, 22, a water cooling pipe, 23, a water tank, 24, a water pump, 25, a resistance heater, 26, an exhaust fan, 27, an oil through pipe, 28, a control valve, 29, a gear pump, 30, a filter element, 31 and a second end cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a hydraulic oil tank with an external filtering structure is disclosed, as shown in figure 1, figure 3 and figure 4, a bracket 2 is arranged on the outer side of the bottom of the hydraulic oil tank 1, a rubber pad 3 is arranged between the hydraulic oil tank 1 and the bracket 2, the bottom of the hydraulic oil tank 1 is arranged in an inclined manner, an oil discharge port 20 is arranged at the lowest point of the bottom of the hydraulic oil tank 1, the oil discharge port 20 is arranged on the rear side of a left side partition plate 19, so that oil can be completely discharged through the oil discharge port 20, a connecting piece 4 penetrates through the hydraulic oil tank 1 and is connected with the bracket 2, the connecting piece 4 is arranged on the outer side of the lower end of the hydraulic oil tank 1, the connecting piece 4 is in threaded connection with the bracket 2, the connecting piece 4 is in sliding connection with the hydraulic oil tank 1, when vibration occurs, the hydraulic oil tank 1 slides along the connecting piece 4, the rubber pad 3 between the hydraulic oil tank 1 and the, and case lid 6 sets up in hydraulic tank 1 top, and the even setting of first bolt 5 is in the case lid 6 outside, and the connected mode of first bolt 5 and hydraulic tank 1 is threaded connection, constitutes sealing connection through first sealed cushion 7 between hydraulic tank 1 and the case lid 6 simultaneously, rotates first bolt 5, makes case lid 6 and hydraulic tank 1 be connected the fastening, and 1 top of hydraulic tank is provided with first sealed cushion 7, and first sealed cushion 7 sets up between hydraulic tank 1 and case lid 6.

As shown in fig. 1, 2, 3, 5 and 6, an oil spill tank 8 is arranged on the left side of a hydraulic oil tank 1, a threaded sleeve 9 is arranged inside the oil spill tank 8, the oil spill tank 8 is in sealing connection with the hydraulic oil tank 1 through a second sealing rubber gasket 12 to prevent oil from leaking through the connection part of the oil spill tank 8 and the hydraulic oil tank 1, a second bolt 10 penetrates through the threaded sleeve 9 to be connected with the top of the hydraulic oil tank 1, the threaded sleeve 9 is arranged on the outer side of an overflow valve 11, the second bolt 10 is in sliding connection with the threaded sleeve 9, the second bolt 10 is in threaded connection with the hydraulic oil tank 1, the second bolt 10 is arranged in a 'mouth' shape by taking the overflow valve 11 as the center, the second bolt 10 is rotated to connect the oil spill tank 8 with the hydraulic oil tank 1, the four second bolts 10 arranged in the 'mouth' shape make the oil spill tank 8 and the hydraulic oil tank 1 more tightly connected, the overflow valve 11 is arranged on the top of the left side of the hydraulic, and the upper end of the overflow valve 11 penetrates through the oil overflow tank 8, the second sealing rubber gasket 12 is arranged outside the overflow valve 11, the second sealing rubber gasket 12 is arranged between the hydraulic oil tank 1 and the oil overflow tank 8, the top of the left side of the oil overflow tank 8 is provided with a first air filter 13, the surface of the tank cover 6 penetrates through an oil return pipe 14, an oil suction pipe 15, an oil filling port 16 and a second air filter 17, the oil return pipe 14 is arranged on the right front side of the tank cover 6, the oil suction pipe 15 is arranged on the left rear side of the tank cover 6, the bottom of the oil suction pipe 15 is provided with an oil filter 18, the right side of the tank cover 6 is provided with the oil filling port 16, and the middle part of the.

As shown in fig. 2, 3 and 4, a partition plate 19 is disposed inside the hydraulic oil tank 1, the partition plate 19 is disposed between the oil suction pipe 15 and the oil return pipe 14, two partition plates 19 are disposed, the two partition plates 19 are respectively connected to the inner walls of the front and rear ends of the hydraulic oil tank 1, the lower ends of the two partition plates 19 are both connected to the bottom of the hydraulic oil tank 1, the two partition plates 19 partition the inside of the hydraulic oil tank 1, so that the path between the lower end of the oil suction pipe 15 and the lower end of the oil return pipe 14 is extended, oil is uniformly dispersed inside the hydraulic oil tank 1, the oil discharge port 20 is disposed at the bottom of the rear end of the hydraulic oil tank 1, the rear end of the oil discharge port 20 is provided with a first end cap 21, a water cooling pipe 22 penetrates through the partition plates 19, and the two ends of the water cooling pipe 22 are respectively connected to a water tank 23 and a water, meanwhile, the resistance heater 25 is arranged above the water pump 24, the exhaust fan 26 is arranged on the right side of the water tank 23, and the water tank 23 and the oil overflow tank 8 are both arranged above the bracket 2.

As shown in fig. 4 and 7, an oil pipe 27 is disposed on the front side of the hydraulic oil tank 1, the upper end and the lower end of the oil pipe 27 are connected to the front side of the hydraulic oil tank 1, a control valve 28 is disposed at the connection between the upper end and the lower end of the oil pipe 27 and the hydraulic oil tank 1, a gear pump 29 and a filter element 30 are disposed inside the oil pipe 27, the outer end of the filter element 30 is attached to the inner wall of the oil pipe 27, the lower end of the filter element 30 is fixed on the top of a second end cap 31, the lowest end of the filter element 30 is located below the connection between the oil pipe 27 and the hydraulic oil tank 1, the gear pump 29 pumps oil through the oil pipe 27, so that the filter element 30 filters all oil passing through the oil pipe 27, the gear pump 29 is disposed above the filter element 30, the lower end of the oil pipe 27 is connected to the second end cap 31, an installation and disassembly structure is formed between the second end cap, facilitating downward sliding removal of cartridge 30.

The working principle is as follows: when the hydraulic oil tank with the external filtering structure is used, firstly, the bracket 2 is installed on a processing device, the connecting piece 4 is rotated to enable the hydraulic oil tank 1 to be installed on the bracket 2, the rubber pad 3 between the hydraulic oil tank 1 and the bracket 2 can play a role of vibration reduction, the tank cover 6 is placed at the top of the hydraulic oil tank 1, the first bolt 5 is rotated to enable the hydraulic oil tank 1 to be connected and fastened with the tank cover 6 through the first bolt 5, the hydraulic oil tank 1 is in sealing connection with the tank cover 6 through the first sealing rubber gasket 7, the oil spill tank 8 is placed at the left side of the hydraulic oil tank 1, the second bolt 10 is rotated, the second bolt 10 penetrates through the screw sleeve 9 to be connected with the hydraulic oil tank 1, the hydraulic oil tank 1 is connected and fastened with the oil spill tank 8, the oil spill tank 8 is in sealing connection with the hydraulic oil tank 1 through the second sealing rubber gasket 12, oil is injected through the oil filling port, the oil filter 18 at the lower end of the oil suction pipe 15 prevents impurities from entering the oil suction pipe 15, oil after work is finished returns to the hydraulic oil tank 1 through the oil return pipe 14, the partition plate 19 plays a role of separating the hydraulic oil tank 1, a path between the oil return pipe 14 and the oil suction pipe 15 is prolonged, when the pressure in the hydraulic oil tank 1 exceeds the standard, the overflow valve 11 discharges oil and air with overpressure, the hydraulic oil tank 1 is protected, the oil and the air enter the oil overflow tank 8, the oil overflow tank 8 collects the oil, the surrounding environment is protected, naked oil is prevented from being subjected to open fire and deflagration, the first air filter 13 and the second air filter 17 play a role of pressure compensation and dust prevention, the gear pump 29 is started, the oil in the hydraulic oil tank 1 is extracted by the gear pump 29 and enters the oil through pipe 27, the filter element 30 filters the impurities in the oil, the clean oil returns to the hydraulic oil tank 1 through the, the second end cover 31 is taken down by rotating, the filter element 30 is taken down by sliding, impurities in the filter element 30 can be cleaned conveniently, when preheating is needed, the resistance heater 25 is started, the resistance heater 25 heats water in the water tank 23, the water pump 24 is started, the water pump 24 pumps hot water to enter the water cooling pipe 22, the temperature of oil in the hydraulic oil tank 1 can be improved rapidly and effectively, when cooling is needed, the water pump 24 is started, the water pump 24 pumps cold water in the water tank 23 to enter the water cooling pipe 22, the water cooling pipe 22 returns to the water tank 23 after absorbing heat in the hydraulic oil tank 1, the exhaust fan 26 is started, the exhaust fan 26 assists in heat dissipation, the temperature of water in the water tank 23 can be reduced rapidly by means of filling ice blocks, the use is safer and more efficient, when oil needs to be replaced, the first end cover 21 is opened by rotating, the inclined bottom surface of the hydraulic oil tank 1 is more convenient for the oil to, those not described in detail in this specification are within the skill of the art.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.