Lubricating oil filtering and cooling device

Abstract

The utility model relates to the technical field of lubricating oil production, in particular to a lubricating oil filtering and cooling device which comprises a left three-way valve and a right three-way valve, the left end of the left three-way valve is connected with a flange at one end of an oil inlet pipe, and a backflow assembly and a filtering assembly are arranged in the space between the left three-way valve and the right three-way valve at intervals from top to bottom. The left end of the filtering assembly is communicated with the lower side end of the left three-way valve, the right end of the filtering assembly is communicated with the lower side end of the right three-way valve, the right end of the backflow assembly is communicated with the upper side end of the right three-way valve, and the left end of the backflow assembly is communicated with the upper side end of the left three-way valve. And the right end part of the right three-way valve is communicated with a corresponding position of a cooling structure. The oil filter has the following beneficial effects that dust entering the second oil pipe flows back into the first oil pipe under the driving of circulating oil and is treated by the filter element, so that the dust is prevented from polluting lubricating oil; and the cooling effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil production, in particular to a lubricating oil filtering and cooling device. Background Art

[0002] Lubricating oil is a liquid lubricant used in various types of machinery, mainly for lubrication, cooling, rust prevention, cleaning, sealing and buffering. As a finished oil, it is mostly made by mixing base oil and additives at a certain temperature by stirring. Therefore, after the mixing is completed, the high-temperature lubricating oil finished product often needs to be cooled.

[0003] At the same time, there are often some mechanical impurities in the finished lubricating oil, such as mud, dust, iron filings, fibers and certain insoluble salts, so they also need to be filtered.

[0004] For example, in the patent document with patent announcement number CN210567458U, a lubricating oil filtering and cooling device is disclosed, which includes a filtering kettle body, a pressure tank, a cooling box and a water storage tank. A pressure tank is arranged through the top of the filtering kettle body, a cooling box is embedded under the filtering kettle body, and a water storage tank is embedded on the right side of the cooling box; the filtering kettle body includes an oil groove, a filter cartridge, a filter core and an oil pipe. The oil groove is embedded in the upper part of the filtering kettle body, the filter cartridges are arranged on both sides below the oil groove, the filter core is embedded in the lower part of the filtering kettle body, and the oil pipe is arranged through the middle of the bottom of the filtering kettle body.

[0005] According to the existing technical literature, the device can remove most of the mechanical impurities in the lubricating oil through the filter cartridge, and then absorb and filter small particles and low-density mechanical impurities through the filter element, and then cool the lubricating oil through the cooling water tank. However, the disadvantage is that the filter cartridge and filter element of the device are both arranged inside the filter kettle body, so when cleaning or replacing the filter cartridge and filter element, the filter kettle body needs to be opened. At this time, dust and impurities in the external environment are easy to adhere to the inside of the filter kettle body, thereby contaminating the lubricating oil that subsequently enters the inside of the filter kettle body; secondly, the lubricating oil of the device flows through the cooling water tank at a faster speed under the pressure of the pressure tank, resulting in poor cooling effect.

[0006] To this end, the utility model optimizes and improves the pollution problems and poor cooling effect caused by replacing the filter element in the prior art, and hereby proposes a new filtering and cooling device that enhances the cooling effect by increasing the heat exchange area and can avoid lubricating oil contamination when replacing the filter element, so as to better solve the problems in the prior art. Utility Model Content

[0007] The utility model is to solve one of the above-mentioned technical problems, and the technical scheme adopted is: a lubricating oil filtering and cooling device, comprising a left three-way valve and a right three-way valve, the end of the left branch pipe of the left three-way valve is flange-connected to one end of an oil inlet pipe, and a reflux component and a filter component are arranged in a space between the left three-way valve and the right three-way valve from top to bottom, the left end of the filter component is fixedly connected to the end of the lower branch pipe of the left three-way valve and the two are internally connected, the right end of the filter component is fixedly connected to the end of the lower branch pipe of the right three-way valve and the two are internally connected, the right end of the reflux component is fixedly connected to the end of the upper branch pipe of the right three-way valve and the two are internally connected, the left end of the reflux component is fixedly connected to the end of the upper branch pipe of the left three-way valve and the two are internally connected, and the end of the right branch pipe of the right three-way valve is fixedly connected to the corresponding position of a cooling structure and the two are internally connected.

[0008] In any of the above schemes, it is preferred that the filter assembly includes a first oil pipe, the left end of the first oil pipe is connected to the end flange of the lower branch pipe of the left three-way valve, the right end of the first oil pipe is connected to the left end flange of a filter tube, a filter element is fixedly installed in the inner cavity of the filter tube, the right end of the filter tube is connected to the left end flange of a second oil pipe, and the right end of the second oil pipe is connected to the end flange of the lower branch pipe of the right three-way valve.

[0009] In any of the above schemes, it is preferred that the reflux assembly includes a third oil pipe, the right end of the third oil pipe is connected to the end flange of the upper branch pipe of the right three-way valve, the left end of the third oil pipe is fixedly connected to the top of a reflux oil storage barrel and the two are internally connected, the oil outlet end at the bottom of the reflux oil storage barrel is flange-connected to the oil inlet end of an oil pump, the oil outlet end of the oil pump is flange-connected to the right end of a fourth oil pipe, and the left end of the fourth oil pipe is flange-connected to the end flange of the upper branch pipe of the left three-way valve.

[0010] In any of the above schemes, preferably, the cooling structure includes a first connecting pipe, an oil outlet pipe, and a second connecting pipe which are connected in series from left to right in sequence, and a plurality of straight ribs are integrally formed on the pipe wall of the oil outlet pipe along its length direction, each of the straight ribs is hollow and the interior is connected to the interior of the oil outlet pipe, and also includes a first cooling water trough, the right end of the first connecting pipe passes through the through hole on the left wall of the first cooling water trough and extends into the inner cavity of the first cooling water trough, the left end of the second connecting pipe passes through the through hole on the right wall of the first cooling water trough and extends into the inner cavity of the first cooling water trough, and the oil outlet pipe is arranged in the inner cavity of the first cooling water trough.

[0011] In any of the above schemes, it is preferred that a water pump and a second cooling water trough are fixedly arranged at intervals below the first cooling water trough, the water pump and the second cooling water trough are connected by a first water pipe, and also include a second water pipe, the middle part of the second water pipe is arranged in the inner cavity of the oil outlet pipe, and a channel for the flow of lubricating oil is formed between the outer wall of the second water pipe and the inner wall of the oil outlet pipe, the left end of the second water pipe passes through the through hole on the tube wall at the left end of the oil outlet pipe and the through hole at the corresponding position of the bottom of the first cooling water trough in sequence, the left end of the second water pipe is connected to the water pump, the right end of the second water pipe passes through the through hole on the tube wall at the right end of the oil outlet pipe and the through hole at the corresponding position of the bottom of the first cooling water trough in sequence, and the right end of the second water pipe is connected to the second cooling water trough.

[0012] In any of the above schemes, preferably, a water inlet is provided at the top of the first cooling water tank.

[0013] In any of the above schemes, preferably, a transparent plate for observing the inner cavity thereof is provided on the side wall of the reflux oil storage barrel.

[0014] In any of the above schemes, preferably, the straight fins are evenly spaced around the axial direction of the oil outlet pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model arranges a left three-way valve and a right three-way valve, thereby arranging a third oil pipe and a fourth oil pipe above the first oil pipe and the second oil pipe, and under the action of the oil pump, a certain amount of lubricating oil can circulate in the four pipes in a counterclockwise direction, so that dust and impurities entering the second oil pipe due to the replacement of the filter element can flow back into the first oil pipe driven by the oil, and then be filtered and processed by the newly replaced filter element, so as to avoid the dust and impurities remaining in the second oil pipe to pollute the filtered lubricating oil, thereby ensuring the quality of the lubricating oil.

[0017] 2. The utility model provides straight fins on the wall of the oil outlet pipe, thereby increasing the heat exchange area between the oil outlet pipe and the cooling water inside the first cooling water tank. This can greatly increase the heat exchange between the high-temperature lubricating oil and the cooling water in the first cooling water tank, and enhance the cooling effect of the device.

[0018] 3. The utility model sets a second water pipe in the inner cavity of the oil outlet pipe, and the lubricating oil flows in the channel between the oil outlet pipe and the second water pipe. Under the action of the water pump, cooling water flows inside the second water pipe, thereby realizing heat exchange between the internal lubricating oil and the cooling water in the second water pipe, further improving the cooling effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the specific implementation of the utility model, the following will briefly introduce the drawings required for the specific implementation. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a front view structural schematic diagram of the utility model.

[0021] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0022] Figure 3 This is a cross-sectional structural diagram of the filter tube of the utility model.

[0023] Figure 4 It is a partial cross-sectional structural diagram of the oil outlet pipe and the second water pipe of the utility model.

[0024] Figure 5 for Figure 1 Cross-sectional structural diagram at the center BB line.

[0025] In the figure, 1. three-way valve on the left; 2. three-way valve on the right; 3. oil inlet pipe; 4. first oil pipe; 5. filter pipe; 6. filter element; 7. second oil pipe; 8. third oil pipe; 9. reflux oil storage barrel; 10. oil pump; 11. fourth oil pipe; 12. transparent plate; 13. first cooling water trough; 14. oil outlet pipe; 15. straight fins; 16. first connecting pipe; 17. second connecting pipe; 18. water pump; 19. second cooling water trough; 20. first water pipe; 21. second water pipe; 22. passage; 23. water outlet; 24. first bracket; 25. second bracket. DETAILED DESCRIPTION

[0026] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figure 1-Figure 5 as shown in .

[0027] A lubricating oil filtering and cooling device comprises a left three-way valve 1 and a right three-way valve 2, wherein the end of the left branch pipe of the left three-way valve 1 is flange-connected to one end of an oil inlet pipe 3, and a reflux component and a filter component are arranged in a space between the left three-way valve 1 and the right three-way valve 2 from top to bottom, the left end of the filter component is fixedly connected to the end of the lower branch pipe of the left three-way valve 1 and the two are internally connected, the right end of the filter component is fixedly connected to the end of the lower branch pipe of the right three-way valve 2 and the two are internally connected, the right end of the reflux component is fixedly connected to the end of the upper branch pipe of the right three-way valve 2 and the two are internally connected, the left end of the reflux component is fixedly connected to the end of the upper branch pipe of the left three-way valve 1 and the two are internally connected, and the end of the right branch pipe of the right three-way valve 2 is fixedly connected to the corresponding position of a cooling structure and the two are internally connected.

[0028] The utility model includes a left three-way valve 1 and a right three-way valve 2, both of which are located at the same height. The left branch pipe and the upper branch pipe of the left three-way valve 1 are used for oil inlet, and the lower branch pipe is used for oil outlet. The lower branch pipe of the right three-way valve 2 is used for oil inlet, and the right branch pipe and the upper branch pipe are used for oil outlet. A reflux component and a filter component are also fixedly arranged between the two, with the reflux component located at the top and the filter component located at the bottom. By adjusting the valve core positions of the left three-way valve 1 and the right three-way valve 2, the connectivity of the oil inlet pipe 3, the reflux component, the filter component and the cooling structure can be adjusted.

[0029] When the device performs orderly processing on the filtration and cooling of the lubricating oil, the left side and the lower branch pipes of the left three-way valve 1 are interconnected, and the upper branch pipe passage is closed, the lower side and the right side branch pipes of the right three-way valve 2 are interconnected, and the upper branch pipe passage is closed, so that the lubricating oil after blending enters the left side branch pipe of the left three-way valve 1 through the oil inlet pipe 3, and then enters the filter assembly through the lower side branch pipe of the left three-way valve 1 for filtering operation, and the clean lubricating oil after filtering passes through the lower side and the right side branch pipe of the right three-way valve 2 in turn, and finally enters the cooling structure for cooling treatment.

[0030] When the filter element is replaced, since the external air will enter the oil pipe of the filter assembly at this time, the dust carried in the air will adhere to the inner wall of the oil pipe, thereby polluting the lubricating oil. Therefore, after the new filter element is replaced, first close the pipeline of the right branch of the right three-way valve 2, so that the branches on the upper and lower sides are interconnected, and at the same time, close the pipeline of the upper branch of the left three-way valve 1, so that the left and lower branches are interconnected, and then the lubricating oil enters the oil inlet pipe 3, and fills the inside of the filter assembly and the reflux assembly through the left three-way valve 1 and the right three-way valve 2. Then close the pipeline of the left branch of the left three-way valve 1, and make the branches on the upper and lower sides interconnected, and then under the action of the reflux assembly, the lubricating oil inside the filter assembly and the reflux assembly circulates, thereby driving the dust adhering to the inner wall of the oil pipe of the filter assembly to circulate together and finally be filtered out by the filter assembly. After circulating for a certain period of time to ensure that all dust is cleaned by the filter assembly, close the upper branch of the right three-way valve 2 and connect the lower and right branches, so that the lubricating oil inside the filter assembly and the reflux assembly can continue to flow into the cooling structure through the right three-way valve 2. When all the circulating oil flows out, connect the left and lower branches of the left three-way valve 1 and close its upper branch passage, and connect the lower and right branches of the right three-way valve 2 and close its upper branch passage, and then the blended lubricating oil can continue to filter and cool in an orderly manner.

[0031] In any of the above schemes, it is preferred that the filter assembly includes a first oil pipe 4, the left end of the first oil pipe 4 is connected to the end flange of the lower branch pipe of the left three-way valve 1, the right end of the first oil pipe 4 is connected to the left end flange of a filter tube 5, a filter element 6 is fixedly installed in the inner cavity of the filter tube 5, the right end of the filter tube 5 is connected to the left end flange of a second oil pipe 7, and the right end of the second oil pipe 7 is connected to the end flange of the lower branch pipe of the right three-way valve 2.

[0032] When the device filters and cools the lubricating oil, the lubricating oil enters the left three-way valve 1 through the oil inlet pipe 3, and then enters the interior of the first oil pipe 4, then flows through the filter tube 5, and completes the filtering operation under the action of the filter element 6, and then enters the cooling structure through the second oil pipe 7 and the right three-way valve 2 for cooling treatment.

[0033] When the filter element 6 needs to be replaced, the operator needs to remove the filter tube 5 and install the new filter element 6 into the filter tube 5. However, the dust in the external air will enter the second oil pipe 7 at this time. Since the subsequent filtered lubricating oil will flow through the second oil pipe 7 before cooling, the lubricating oil just filtered will be contaminated. In order to avoid this situation, the utility model sets a reflux component above the filter component, and after replacing the filter element 6, by adjusting the valve core position of the left three-way valve 1 and the right three-way valve 2, the first oil pipe 4, the second oil pipe 7 and the reflux component are filled with a certain amount of lubricating oil, and then under the action of the reflux component, the lubricating oil inside the three circulates, so that the dust adhering to the inner wall of the second oil pipe 7 is driven by the oil to flow back to the first oil pipe 4, and then continues to flow and is filtered and processed by the filter element 6.

[0034] In any of the above schemes, it is preferred that the reflux assembly includes a third oil pipe 8, the right end of the third oil pipe 8 is connected to the end flange of the upper branch pipe of the right three-way valve 2, the left end of the third oil pipe 8 is fixedly connected to the top of a reflux oil storage barrel 9 and the two are internally connected, the oil outlet end at the bottom of the reflux oil storage barrel 9 is flange-connected to the oil inlet end of an oil pump 10, the oil outlet end of the oil pump 10 is flange-connected to the right end of a fourth oil pipe 11, and the left end of the fourth oil pipe 11 is flange-connected to the end of the upper branch pipe of the left three-way valve 1.

[0035] After replacing the filter element 6, by adjusting the valve core positions of the left three-way valve 1 and the right three-way valve 2, the first oil pipe 4, the second oil pipe 7, the third oil pipe 8 and the return oil storage barrel 9 are filled with lubricating oil, and then the oil pump 10 is turned on to allow the oil to circulate in the first oil pipe 4, the second oil pipe 7, the third oil pipe 8, the return oil storage barrel 9 and the fourth oil pipe 11 in a counterclockwise direction, thereby returning the dust adhering to the inner wall of the second oil pipe 7 to the interior of the first oil pipe 4 and being filtered out by the filter element 6 in the subsequent flow.

[0036] The return oil storage barrel 9 is fixedly installed on the corresponding installation station through the first bracket 24, and the oil pump 10 is fixedly set on the ground through the second bracket 25.

[0037] In any of the above schemes, it is preferred that the cooling structure includes a first connecting pipe 16, an oil outlet pipe 14 and a second connecting pipe 17 which are connected in series from left to right in sequence, and a plurality of straight ribs 15 are integrally formed on the pipe wall of the oil outlet pipe 14 along its length direction, each of the straight ribs 15 is hollow and the interior is connected to the interior of the oil outlet pipe 14, and also includes a first cooling water trough 13, the right end of the first connecting pipe 16 passes through the through hole on the left wall of the first cooling water trough 13 and extends into the inner cavity of the first cooling water trough 13, the left end of the second connecting pipe 17 passes through the through hole on the right wall of the first cooling water trough 13 and extends into the inner cavity of the first cooling water trough 13, and the oil outlet pipe 14 is arranged in the inner cavity of the first cooling water trough 13.

[0038] The lubricating oil after filtration flows through the first connecting pipe 16, the oil outlet pipe 14 and the second connecting pipe 17 in sequence. A plurality of straight fins 15 are formed at intervals along the length direction of the pipe wall surface of the oil outlet pipe 14, and the inside of the straight fins 15 is connected with the inside of the oil outlet pipe 14. The lubricating oil fills the straight fins 15 after entering the inside of the oil outlet pipe 14. The oil outlet pipe 14 is arranged inside the first cooling water tank 13, and the inside of the first cooling water tank 13 is filled with cooling water. Under the action of the straight fins 15, the heat exchange area can be greatly increased, and the cooling effect of the cooling water on the lubricating oil can be improved.

[0039] The first connecting pipe 16 and the second connecting pipe 17 are sealed at corresponding positions where they pass through the first cooling water tank 13 to prevent cooling water from leaking out.

[0040] In any of the above schemes, it is preferred that a water pump 18 and a second cooling water trough 19 are fixedly arranged at intervals below the first cooling water trough 13, the water pump 18 and the second cooling water trough 19 are connected by a first water pipe 20, and also include a second water pipe 21, the middle part of the second water pipe 21 is arranged in the inner cavity of the oil outlet pipe 14, and a channel 22 for lubricating oil flow is formed between the outer wall of the second water pipe 21 and the inner wall of the oil outlet pipe 14, the left end of the second water pipe 21 passes through the through hole on the tube wall at the left end of the oil outlet pipe 14 and the through hole at the corresponding position of the bottom of the first cooling water trough 13 in sequence, the left end of the second water pipe 21 is connected to the water pump 18, the right end of the second water pipe 21 passes through the through hole on the tube wall at the right end of the oil outlet pipe 14 and the through hole at the corresponding position of the bottom of the first cooling water trough 13 in sequence, and the right end of the second water pipe 21 is connected to the second cooling water trough 19.

[0041] In order to ensure that the lubricating oil in the middle of the oil outlet pipe 14 can also be well cooled, a second water pipe 21 is arranged in the middle of the oil outlet pipe 14, and a channel 22 is formed between the outer wall of the second water pipe 21 and the inner wall of the oil outlet pipe 14, and the lubricating oil flows in the channel 22. The left and right ends of the second water pipe 21 respectively pass through the through holes at the corresponding positions on the oil outlet pipe 14 and the first cooling water tank 13, thereby extending to the bottom of the first cooling water tank 13 and being connected to the water pump 18 and the second cooling water tank 19 respectively. Under the action of the water pump 18, the cooling water in the second cooling water tank 19 circulates in the first water pipe 20 and the second water pipe 21. When the cooling water flows through the middle position of the second water pipe 21, it can exchange heat with the lubricating oil flowing in the channel 22, thereby further cooling the lubricating oil, ensuring that the lubricating oil in the middle of the oil outlet pipe 14 can also be well cooled.

[0042] The through holes of the second water pipe 21 passing through the oil outlet pipe 14 and the first cooling water tank 13 are sealed to ensure that the cooling water will not leak out of the first cooling water tank 13 or enter the channel 22 to contaminate the lubricating oil.

[0043] In any of the above solutions, preferably, a water inlet 23 is provided at the top of the first cooling water tank 13. The cooling water in the first cooling water tank 13 is replaced in time through the water inlet 23.

[0044] In any of the above schemes, preferably, a transparent plate 12 for observing the inner cavity is provided on the side wall of the reflux oil storage barrel 9. The lubricating oil level inside the reflux oil storage barrel 9 is constantly observed through the transparent plate 12.

[0045] In any of the above solutions, it is preferred that the straight fins 15 are evenly spaced around the axial direction of the oil outlet pipe 14. The evenly spaced straight fins can ensure that the lubricating oil at all locations can be well cooled.

[0046] Specific working principle:

[0047] When filtering and cooling the blended lubricating oil, first adjust the valve core positions of the left three-way valve 1 and the right three-way valve 2, connect the oil inlet pipe 3, the first oil pipe 4, the second oil pipe 7 and the first connecting pipe 16 in sequence, and the lubricating oil flows through the four in sequence, and finally enters the channel 22 formed between the oil outlet pipe 14 and the second water pipe 21. Under the action of the straight fins 15, the external heat exchange area is increased, so that the cooling water inside the first cooling water tank 13 can cool the lubricating oil better. At the same time, under the action of the second water pipe 21, the cooling water in the second cooling water tank 19 can cool the inside of the lubricating oil. In this way, under the simultaneous heat exchange between the inside and the outside, the cooling effect of the device on the lubricating oil can be better.

[0048] After the filter element 6 is replaced, the valve core positions of the left three-way valve 1 and the right three-way valve 2 are adjusted so that the first oil pipe 4, the second oil pipe 7, the third oil pipe 8 and the fourth oil pipe 11 are filled with lubricating oil, and the subsequent lubricating oil will circulate in the four in a counterclockwise direction, so that the dust entering the second oil pipe 7 will flow back to the first oil pipe 4 with the help of the oil, and then be cleaned by the filter element 6, so as to avoid the lubricating oil after filtration being contaminated by dust before entering the cooling structure. After the oil circulates for a period of time, the valve core positions of the left three-way valve 1 and the right three-way valve 2 are adjusted back to the initial state, so that the oil inlet pipe 3, the first oil pipe 4, the second oil pipe 7 and the first connecting pipe 16 are reconnected, and the orderly filtering and cooling of the lubricating oil continues.

[0049] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

[0050] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A lubricating oil filtering and cooling device, Features: The invention comprises a left three-way valve (1) and a right three-way valve (2), wherein the end of the left branch pipe of the left three-way valve (1) is flange-connected to one end of an oil inlet pipe (3), and a reflux component and a filter component are arranged in a space between the left three-way valve (1) and the right three-way valve (2) from top to bottom, wherein the left end of the filter component is fixedly connected to the end of the lower branch pipe of the left three-way valve (1) and the two are internally connected, the right end of the filter component is fixedly connected to the end of the lower branch pipe of the right three-way valve (2) and the two are internally connected, the right end of the reflux component is fixedly connected to the end of the upper branch pipe of the right three-way valve (2) and the two are internally connected, the left end of the reflux component is fixedly connected to the end of the upper branch pipe of the left three-way valve (1) and the two are internally connected, and the end of the right branch pipe of the right three-way valve (2) is fixedly connected to a corresponding position of a cooling structure and the two are internally connected.

2. A lubricating oil filtering and cooling device according to claim 1, Features: The filter assembly comprises a first oil pipe (4), the left end of the first oil pipe (4) being connected to the end flange of the lower branch pipe of the left three-way valve (1), the right end of the first oil pipe (4) being connected to the left end flange of a filter pipe (5), a filter element (6) being fixedly installed in the inner cavity of the filter pipe (5), the right end of the filter pipe (5) being connected to the left end flange of a second oil pipe (7), and the right end of the second oil pipe (7) being connected to the end flange of the lower branch pipe of the right three-way valve (2).

3. A lubricating oil filtering and cooling device according to claim 2, Features: The reflux assembly comprises a third oil pipe (8), the right end of the third oil pipe (8) is connected to the end flange of the upper branch pipe of the right three-way valve (2), the left end of the third oil pipe (8) is fixedly connected to the top of a reflux oil storage barrel (9) and the two are internally connected, the oil outlet end at the bottom of the reflux oil storage barrel (9) is connected to the oil inlet end flange of an oil pump (10), the oil outlet end of the oil pump (10) is connected to the right end flange of a fourth oil pipe (11), and the left end of the fourth oil pipe (11) is connected to the end flange of the upper branch pipe of the left three-way valve (1).

4. A lubricating oil filtering and cooling device according to claim 3, Features: The cooling structure comprises a first connecting pipe (16), an oil outlet pipe (14) and a second connecting pipe (17) which are connected in series from left to right. A plurality of straight ribs (15) are integrally formed on the wall of the oil outlet pipe (14) along its length direction. Each of the straight ribs (15) is hollow and its interior is connected to the interior of the oil outlet pipe (14). The cooling structure also comprises a first cooling water trough (13). The right end of the first connecting pipe (16) passes through a through hole on the left wall of the first cooling water trough (13) and extends into the inner cavity of the first cooling water trough (13). The left end of the second connecting pipe (17) passes through a through hole on the right wall of the first cooling water trough (13) and extends into the inner cavity of the first cooling water trough (13). The oil outlet pipe (14) is arranged in the inner cavity of the first cooling water trough (13).

5. A lubricating oil filtering and cooling device according to claim 4, Features: A water pump (18) and a second cooling water trough (19) are fixedly arranged at intervals below the first cooling water trough (13); the water pump (18) and the second cooling water trough (19) are connected to each other via a first water pipe (20), and further include a second water pipe (21); the middle portion of the second water pipe (21) is arranged in the inner cavity of the oil outlet pipe (14); a channel (22) for the flow of lubricating oil is formed between the outer wall of the second water pipe (21) and the inner wall of the oil outlet pipe (14); The left end of the second water pipe (21) passes through the through hole on the left end wall of the oil outlet pipe (14) and the through hole at the corresponding position of the bottom of the first cooling water tank (13) in sequence, and the left end of the second water pipe (21) is connected to the water pump (18). The right end of the second water pipe (21) passes through the through hole on the right end wall of the oil outlet pipe (14) and the through hole at the corresponding position of the bottom of the first cooling water tank (13) in sequence, and the right end of the second water pipe (21) is connected to the second cooling water tank (19).

6. A lubricating oil filtering and cooling device according to claim 5, Features: A water opening (23) is provided at the top of the first cooling water tank (13).

7. A lubricating oil filtering and cooling device according to claim 6, Features: A transparent plate (12) for observing the inner cavity of the reflux oil storage barrel (9) is provided on the side wall of the reflux oil storage barrel (9).

8. A lubricating oil filtering and cooling device according to claim 7, Features: The straight fins (15) are arranged at even intervals in the axial direction around the oil outlet pipe (14).

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