Lubricating oil replacing device for air compressor of motor train unit

Abstract

The utility model discloses a motor train unit air compressor lubricating oil replacing device, which comprises a box body, a box cover, a motor train unit air compressor, a motor train unit air compressor and a lubricating oil replacing device, and is characterized in that the box body is internally provided with a partition plate; the new oil adding assembly comprises a new oil barrel, a new oil valve and a new oil pump, an oil outlet of the new oil barrel is connected with the input end of the new oil pump, an oil inlet of the new oil barrel is connected with the output end of the new oil pump, the input end of the new oil pump is connected with a new oil supplementing pipe, and the output end of the new oil pump is further connected with a new oil adding pipe; the waste oil discharging assembly comprises a waste oil barrel, a waste oil valve and a waste oil pump, an oil outlet of the waste oil barrel is connected with the input end of the waste oil pump, an oil inlet of the waste oil barrel is connected with the output end of the waste oil pump, the input end of the waste oil pump is connected with a waste oil pumping pipe, and the output end of the waste oil pump is further connected with a waste oil discharging pipe; and the control assembly comprises a main controller, an operation screen and a power supply which are arranged on the box body. The lubricating oil of the air compressor is replaced, and meanwhile pollution to the environment caused by leakage of the lubricating oil is avoided.

Description

Technical Field

[0001] The embodiment of the utility model belongs to the technical field of lubricating oil filling, and more specifically, relates to a lubricating oil replacement device for an EMU air compressor. Background Art

[0002] As an important part of the braking system, the main air compressor provides air source for the normal braking of the train on the one hand, and also provides air source for all major air-using systems in the train, such as air conditioners, doors, toilets, etc. When maintaining the main air compressor of the EMU, it is usually necessary to replace the lubricating oil in the main air compressor. During operation, the lubricating oil in the main air compressor is drained into the waste oil barrel, and the new oil is directly poured into the main air compressor. The waste oil discharge is easy to scald the operator due to the high oil temperature, and the inconvenience of operation due to space reasons easily causes the waste oil to be discharged to the bottom plate. Refueling is more labor-intensive due to the small space.

[0003] At present, the most widely used method is to use an oil pump to extract the waste lubricating oil in the mechanical product, and then use the oil pump to add new lubricating oil. The Chinese patent with publication number CN324838337U discloses a suction device for replacing lubricating oil, including a storage box and a protective cylinder. A new oil barrel and an old oil barrel are placed on both sides of the bottom of the inner cavity of the storage box, and a first oil pump and a second oil pump are fixedly connected on both sides of the top of the storage box. Through the arrangement of the first oil pump, the second oil pump, the first delivery pipe, the second delivery pipe, the telescopic pipe, the connecting pipe and the oil nozzle, a suction device for quickly replacing the lubricating oil is jointly constructed. The used lubricating oil in the gear box can be pumped into the old oil barrel by the first oil pump, and the lubricating oil in the new oil barrel is injected into the gear box by the second oil pump, so as to complete the rapid replacement of the lubricating oil.

[0004] However, the Chinese patent with publication number CN324838337U cannot control the amount of waste oil extracted when replacing the lubricating oil, and the oil pump may run idle, causing damage to the device, and the amount of new oil added cannot be effectively controlled. Therefore, a lubricating oil replacement device for an EMU air compressor is needed, which can monitor the amount of lubricating oil in the air compressor lubricating oil tank during the process of pumping and refueling to prevent over-pumping or over-adding. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a lubricating oil changing device for an EMU air compressor, which controls the waste oil draining component to extract the waste oil in the lubricating oil tank of the air compressor. After the oil extraction is completed, the new oil adding component is controlled to add new oil into the lubricating oil tank of the air compressor. During the whole process, it is only necessary to manually extend the corresponding oil pipe from the top cover of the lubricating oil tank of the air compressor, and then start the corresponding oil pump to complete the oil draining and refueling operations. There is no need to open the oil drain port at the bottom of the lubricating oil tank of the air compressor, so that the lubricating oil does not come into contact with the external environment during the whole replacement process, thereby avoiding pollution to the environment caused by leakage of lubricating oil during the oil change process, and realizing control of the entire oil change process.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a lubricating oil replacement device for an EMU air compressor, comprising:

[0007] A box body, wherein a partition is provided inside the box body to separate the box body into a lower layer and an upper layer of the box body;

[0008] A new oil filling assembly, the new oil filling assembly comprises a new oil barrel, a new oil valve and a new oil pump, the oil outlet of the new oil barrel is connected to the input end of the new oil pump, the oil inlet of the new oil barrel is connected to the output end of the new oil pump, and the input end of the new oil pump is also connected to a new oil replenishing pipe, and the output end of the new oil pump is also connected to a new oil filling pipe;

[0009] A waste oil discharge assembly, the waste oil discharge assembly comprising a waste oil barrel, a waste oil valve and a waste oil pump, the oil outlet of the waste oil barrel is connected to the input end of the waste oil pump, the oil inlet of the waste oil barrel is connected to the output end of the waste oil pump, the input end of the waste oil pump is also connected to a waste oil extraction pipe, and the output end of the waste oil pump is also connected to a waste oil discharge pipe;

[0010] And a control component, the control component includes a main controller, an operation screen and a power supply arranged on the box.

[0011] Furthermore, the oil outlet of the new oil barrel passes through the new oil pump and forms a new oil filling line with the new oil filling pipe, and the lubricating oil in the new oil barrel is added to the lubricating oil tank of the air compressor through the new oil filling line;

[0012] The new oil replenishing pipe passes through the new oil pump and forms a new oil replenishing pipeline with the oil inlet of the new oil barrel, and the external new lubricating oil is replenished into the new oil barrel through the new oil replenishing pipeline.

[0013] Further, the new oil valve is a normally closed solenoid valve, including a new oil valve, b new oil valve, c new oil valve and d new oil valve;

[0014] The a new oil valve is arranged at the oil outlet of the new oil barrel, the b new oil valve is arranged on the new oil replenishing pipe, the c new oil valve is arranged at the oil inlet of the new oil barrel, and the d new oil valve is arranged on the new oil filling pipe;

[0015] When the new oil barrel delivers new lubricating oil to the air compressor lubricating oil tank, the a new oil valve is connected to the d new oil valve, the b new oil valve is disconnected from the c new oil valve, and the output end of the new oil filling pipe is placed in the air compressor lubricating oil tank;

[0016] When external new lubricating oil is replenished into the new oil barrel, the b new oil valve is connected to the c new oil valve, the a new oil valve is disconnected from the d new oil valve, and the input end of the new oil replenishing pipe is arranged in the external new oil barrel.

[0017] Furthermore, a new oil flow meter is installed at the output end of the new oil pump;

[0018] A hook is provided at the output end of the new oil filling pipe, and a liquid level sensor is also provided at the oil nozzle at the output end of the new oil filling pipe.

[0019] Furthermore, the waste oil extraction pipe, after passing through the waste oil pump, forms a waste oil extraction pipeline with the oil inlet of the waste oil barrel, and the waste lubricating oil in the lubricating oil tank of the air compressor is extracted into the waste oil barrel through the waste oil extraction pipeline;

[0020] The waste oil drain pipe passes through the waste oil pump and forms a waste oil drain pipeline with the oil inlet of the external waste oil barrel, and the waste lubricating oil in the waste oil barrel is discharged into the external waste oil barrel through the waste oil drain pipeline.

[0021] Further, the waste oil valve is a normally closed solenoid valve, including waste oil valve a, waste oil valve b, waste oil valve c and waste oil valve d;

[0022] The waste oil valve a is arranged at the oil outlet of the waste oil barrel, the waste oil valve b is arranged on the waste oil discharge pipe, the waste oil valve c is arranged at the oil inlet of the waste oil barrel, and the waste oil valve d is arranged on the waste oil extraction pipe;

[0023] When the waste oil barrel transports waste lubricating oil to an external waste oil barrel, the waste oil valve a is connected to the waste oil valve d, the waste oil valve b is disconnected from the waste oil valve c, and the output end of the waste oil drain pipe is placed in the external waste oil barrel;

[0024] When the waste lubricating oil in the lubricating oil tank of the air compressor is pumped into the waste oil barrel, the waste oil valve b is connected with the waste oil valve c, the waste oil valve a is disconnected with the waste oil valve d, and the input end of the waste oil extraction pipe is arranged in the lubricating oil tank of the air compressor.

[0025] Furthermore, a waste oil flow meter is installed at the output end of the waste oil pump;

[0026] The input end of the waste oil extraction pipe is also provided with a hydraulic pressure sensor.

[0027] Furthermore, a drain port is provided at the bottom of the waste oil barrel, a detachable end cover is provided at the bottom of the drain port, and a drain valve is provided between the drain port and the bottom of the waste oil barrel, and the drain valve is a normally open solenoid valve;

[0028] A filter is also installed on the waste oil extraction pipe.

[0029] Furthermore, the waste oil extraction pipe is also covered with an oil scraper sleeve;

[0030] The outside of the oil scraper sleeve is a hollow shaft sleeve, and a multi-layer oil scraper plate is arranged inside. The oil scraper plate is set in an inverted cone shape, and the cone part is in close contact with the outer pipe wall of the waste oil extraction pipe;

[0031] The rear end of the oil scraper sleeve is also provided with a cavity, in which replaceable oil absorbing cotton is installed.

[0032] Furthermore, the main controller includes a main control chip and a relay group;

[0033] The new oil valve, new oil pump, new oil flow meter, liquid level sensor, waste oil valve, waste oil flow meter and hydraulic sensor are all connected to the main controller signal;

[0034] The operation screen is connected to the main controller signal.

[0035] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0036] 1. The utility model is a device for replacing lubricating oil of an EMU air compressor. A control component is used to control a waste oil discharge component to extract waste oil from a lubricating oil tank of an air compressor. After the oil extraction is completed, the control component is used to control a new oil addition component to add new oil to the lubricating oil tank of the air compressor. During the entire process, only the corresponding oil pipe needs to be manually extended from the top cover of the lubricating oil tank of the air compressor, and then the corresponding oil pump is turned on to complete the oil discharge and oil addition operations. There is no need to open the oil discharge port at the bottom of the lubricating oil tank of the air compressor, so that the lubricating oil does not contact the external environment during the entire replacement process, thereby avoiding pollution to the environment caused by leakage of lubricating oil during the oil change process, and realizing control of the entire oil change process.

[0037] 2. The control component of the utility model is connected with other components through signals to control other components, and realizes one-key operation on the operation screen, which simplifies the operation process, makes the operation more accurate, and facilitates the control of oil pumping and refueling operations.

[0038] 3. The waste oil discharge assembly of the utility model is provided with a filter and a sewage outlet, which removes impurities in the waste oil twice, reduces the impurity content of the waste oil in the oil discharge pipeline and the waste oil barrel, and prevents impurities from damaging the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a lubricating oil replacement device for an EMU air compressor according to an embodiment of the utility model;

[0040] Figure 2 This is a schematic diagram of the connection principle of a lubricating oil replacement device for an EMU air compressor according to an embodiment of the utility model;

[0041] Figure 3 This is a schematic diagram of the box structure of a lubricating oil replacement device for an EMU air compressor according to an embodiment of the utility model;

[0042] Figure 4 The present invention is a schematic diagram of the structure of an oil scraper sleeve of a lubricating oil replacement device for an EMU air compressor according to an embodiment of the present invention.

[0043] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-box, 11-box lower layer, 12-box upper layer, 13-box door, 2-new oil filling assembly, 21-new oil barrel, 22-new oil valve, 22a-a new oil valve, 22b-b new oil valve, 22c-c new oil valve, 22d-d new oil valve, 23-new oil pump, 24-new oil flow meter, 25-new oil filling pipe, 26 -New oil replenishing pipe, 3-waste oil discharge assembly, 31-waste oil barrel, 32-waste oil valve, 32a-a waste oil valve, 32b-b waste oil valve, 32c-c waste oil valve, 32d-d waste oil valve, 33-waste oil pump, 34-waste oil flow meter, 35-waste oil extraction pipe, 36-waste oil discharge pipe, 37-filter, 38-oil scraper sleeve, 4-control assembly, 41-main controller, 42-operation screen, 43-power supply. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 , 2As shown, the embodiment of the utility model provides a lubricating oil replacement device for an EMU air compressor, comprising: a housing 1, a new oil adding component 2 arranged inside the housing 1, a waste oil draining component 3 arranged inside the housing 1, and a control component 4 arranged on the housing 1. The control component 4 is used to control the waste oil draining component 3 to extract the waste oil in the lubricating oil tank of the air compressor. After the oil extraction is completed, the control component 4 is used to control the new oil adding component 2 to add new oil to the lubricating oil tank of the air compressor. During the whole process, it is only necessary to manually extend the corresponding oil pipe from the top cover of the lubricating oil tank of the air compressor, and then start the corresponding oil pump to complete the oil draining and refueling operations, without opening the oil drain port at the bottom of the lubricating oil tank of the air compressor, so that the lubricating oil does not contact the external environment during the whole replacement process, avoiding the pollution of the environment caused by the leakage of lubricating oil during the oil change process, and realizing the control of the whole oil change process.

[0046] like Figure 3 As shown, the box 1 is closed on five sides, and a partition is provided inside, which divides the box 1 into a lower layer 11 and an upper layer 12. The unclosed surface of the box 1 is installed with a box door 13, and the box door 13 is installed on the box 1 with a hinge. A rectangular installation hole is also opened on the top of the box 1, and universal wheels are installed at the four corners of the bottom. The universal wheels are provided with a locking device, and a handle is also provided at one end of the box 1. The box 1 provides installation space for other components, so that the components of the device are connected in an orderly manner as a whole.

[0047] The new oil filling assembly 2 includes a new oil barrel 21 disposed in the lower layer 11 of the box body, a new oil valve 22 disposed in the upper layer 12 of the box body, and a new oil pump 23 disposed in the upper layer 12 of the box body. The new oil barrel 21 is provided with an oil inlet and an oil outlet at the top, a liquid level gauge is provided on the outside, and an electronic liquid level gauge is provided on the inside. The oil outlet of the new oil barrel 21 is connected to the input end of the new oil pump 23, the oil inlet of the new oil barrel 21 is connected to the output end of the new oil pump 23, and the input end of the new oil pump 23 is also connected to a new oil replenishing pipe 26, and the output end of the new oil pump 23 is also connected to a new oil filling pipe 25. The new oil filling pipe 25 and the new oil filling pipe 26 are connected to other oil pipes through a 304 stainless steel crosshead hose clamp, and the new oil pump 23 adopts an electric diaphragm oil-water mixing pump. The oil outlet of the new oil barrel 21 passes through the new oil pump 23 and forms a new oil filling pipeline with the new oil filling pipe 25, through which the lubricating oil in the new oil barrel 21 is added to the air compressor lubricating oil tank; the new oil replenishing pipe 26 passes through the new oil pump 23 and forms a new oil replenishing pipeline with the oil inlet of the new oil barrel 21, through which the external new lubricating oil is added into the new oil barrel 21.

[0048] The new oil valve 22 is a normally closed solenoid valve, including a new oil valve 22a, b new oil valve 22b, c new oil valve 22c and d new oil valve 22d, wherein the a new oil valve 22a is arranged at the oil outlet of the new oil barrel 21, the b new oil valve 22b is arranged on the new oil replenishing pipe 26, the c new oil valve 22c is arranged at the oil inlet of the new oil barrel 21, and the d new oil valve 22d is arranged on the new oil filling pipe 25. By controlling different valves in the new oil valve 22, the oil circuit of the new oil pump 23 is adjusted, specifically: the a new oil valve 22a is connected to the d new oil valve 22d, the b new oil valve 22b is disconnected from the c new oil valve 22c, and the output end of the new oil filling pipe 25 is placed in the air compressor lubricating oil tank. After the new oil pump 23 is turned on, the new lubricating oil in the new oil barrel 21 is transported to the air compressor lubricating oil tank through its oil outlet; the b new oil valve 22b is connected to the c new oil valve 22c, the a new oil valve 22a is disconnected from the d new oil valve 22d, and the input end of the new oil replenishing pipe 26 is arranged in the external new oil barrel. After the new oil pump 23 is turned on, the new lubricating oil in the external new oil barrel is replenished into the new oil barrel 21.

[0049] A new oil flow meter 24 is also installed at the output end of the new oil pump 23 to monitor the real-time flow rate at the output end of the new oil pump 23 .

[0050] The output end of the new oil filling pipe 25 is provided with a hook, and when filling, the hook is used to hang on the oil inlet of the air compressor lubricating oil tank. A liquid level sensor is also provided at the oil nozzle at the output end of the new oil filling pipe 25, which is used to monitor the oil level of the new lubricating oil added to the air compressor lubricating oil tank to prevent it from being overfilled and overflowing, and the liquid level sensor is arranged at the rear end of the oil nozzle to prevent the lubricating oil sprayed from the oil nozzle from interfering with the liquid level sensor during the filling process.

[0051] The waste oil discharge assembly 3 includes a waste oil barrel 31 disposed in the lower layer 11 of the box body, a waste oil valve 32 disposed in the upper layer 12 of the box body, and a waste oil pump 33 disposed in the upper layer 12 of the box body. The top of the new oil barrel 21 is provided with an oil inlet and an oil outlet, a liquid level gauge is disposed on the outside, and an electronic liquid level gauge is disposed on the inside. The oil outlet of the waste oil barrel 31 is connected to the input end of the waste oil pump 33, the oil inlet of the waste oil barrel 31 is connected to the output end of the waste oil pump 33, and the input end of the waste oil pump 33 is also connected to a waste oil extraction pipe 35, and the output end of the waste oil pump 33 is also connected to a waste oil discharge pipe 36. The waste oil extraction pipe 35, the waste oil discharge pipe 36 and other oil pipes are connected by a 304 stainless steel crosshead hose clamp, and the waste oil pump 33 adopts an electric diaphragm oil-water mixing pump. The waste oil extraction pipe 35 passes through the waste oil pump 33 and forms a waste oil extraction pipeline with the oil inlet of the waste oil barrel 31, through which the waste lubricating oil in the air compressor lubricating oil tank is pumped into the waste oil barrel 31; the waste oil discharge pipe 36 passes through the waste oil pump 33 and forms a waste oil discharge pipeline with the oil inlet of the external waste oil barrel, through which the waste lubricating oil in the waste oil barrel 31 is discharged into the external waste oil barrel.

[0052] The waste oil valve 32 is a normally closed solenoid valve, including a waste oil valve 32a, b waste oil valve 32b, c waste oil valve 32c and d waste oil valve 32d, wherein the a waste oil valve 32a is arranged at the oil outlet of the waste oil barrel 31, the b waste oil valve 32b is arranged on the waste oil discharge pipe 36, the c waste oil valve 32c is arranged at the oil inlet of the waste oil barrel 31, and the d waste oil valve 32d is arranged on the waste oil extraction pipe 35. By controlling different valves in the waste oil valve 32, the oil circuit of the waste oil pump 33 is adjusted, specifically: the a waste oil valve 32a is connected to the d waste oil valve 32d, the b waste oil valve 32b is disconnected from the c waste oil valve 32c, the output end of the waste oil drain pipe 36 is placed in an external waste oil barrel, and after the waste oil pump 33 is turned on, the waste lubricating oil in the waste oil barrel 31 is transported to the external waste oil barrel through its oil outlet; the b waste oil valve 32b is connected to the c waste oil valve 32c, the a waste oil valve 32a is disconnected from the d waste oil valve 32d, and the input end of the waste oil extraction pipe 35 is set in the lubricating oil tank of the air compressor. After the waste oil pump 33 is turned on, the waste lubricating oil in the lubricating oil tank of the air compressor is pumped into the waste oil barrel 31.

[0053] A waste oil flow meter 34 is also installed at the output end of the waste oil pump 33 to monitor the real-time flow rate at the output end of the waste oil pump 33 .

[0054] The waste oil extraction pipe 35 is also provided with a filter 37 , and the filter 37 filters the waste lubricating oil extracted from the lubricating oil tank of the air compressor to prevent impurities therein from damaging the waste oil pump 33 .

[0055] The bottom of the waste oil barrel 31 is provided with a drain port, a detachable end cap is provided at the bottom of the drain port, and a drain valve is provided between the bottom of the waste oil barrel 31 and the drain valve is a normally open electromagnetic valve, and the waste lubricating oil entering the waste oil barrel 31 and the remaining impurities therein are precipitated in the drain port. When in use, the drain valve is closed, the end cap is opened, and the precipitated impurities therein are cleaned.

[0056] The input end of the waste oil extraction pipe 35 is also provided with a hydraulic sensor for monitoring the bottom pressure of the waste lubricating oil in the air compressor lubricating oil tank to prevent the waste oil pump 33 from running idle after the waste oil is completely extracted. The input end of the waste oil extraction pipe 35 is made of metal material, and its gravity is greater than the buoyancy it receives in the air compressor lubricating oil tank, so that it always remains at the bottom of the air compressor lubricating oil tank.

[0057] like Figure 4 As shown, the waste oil extraction pipe 35 is also covered with an oil scraper sleeve 38, the outside of the oil scraper sleeve 38 is a hollow shaft sleeve, and the inside is provided with a multi-layer oil scraper plate, the oil scraper plate is set in an inverted cone, the bottom is made of hard material, the cone is made of rubber material, and the cone is in close contact with the outer tube wall of the waste oil extraction pipe 35. The rear end of the oil scraper sleeve 38 is also provided with a cavity, and a replaceable oil-absorbing cotton is installed in the cavity. After the oil extraction is completed, the waste oil extraction pipe 35 is taken out from the air compressor lubricating oil tank, and the oil scraper sleeve 38 is pushed to the oil inlet of the air compressor lubricating oil tank. The waste oil extraction pipe 35 is retracted and the waste lubricating oil remaining on it is cleaned.

[0058] The control component 4 includes a main controller 41 installed on the box 1, an operation screen 42 provided on the top of the box 1, and a power supply 43 provided on the outside of the box 1. The main controller 41 includes a main control chip and a relay group for controlling other components. The operation screen 42 is provided with a display interface including parameters such as the oil volume, pressure, and flow rate of the oil barrel, and a control interface including components such as the oil pump and the oil valve. The new oil valve 22, the new oil pump 23, the new oil flow meter 24, the liquid level sensor, the waste oil valve 32, the waste oil flow meter 34, and the hydraulic sensor are all connected to the main controller 41 signal, and the main controller 41 controls the start, stop, and interlocking of the device. The operation screen 42 is connected to the main controller 41 signal, and the main controller 41 is used to input instructions to the main controller 41 through the operation screen 42 to send to each component of the device.

[0059] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lubricating oil replacement device for an EMU air compressor, characterized in that: include: A box body (1), wherein a partition is provided inside the box body (1) to divide the box body (1) into a lower box layer (11) and an upper box layer (12); A new oil filling assembly (2), the new oil filling assembly (2) comprising a new oil barrel (21), a new oil valve (22) and a new oil pump (23), the oil outlet of the new oil barrel (21) being connected to the input end of the new oil pump (23), the oil inlet of the new oil barrel (21) being connected to the output end of the new oil pump (23), the input end of the new oil pump (23) being further connected to a new oil replenishing pipe (26), and the output end of the new oil pump (23) being further connected to a new oil filling pipe (25); A waste oil discharge assembly (3), the waste oil discharge assembly (3) comprising a waste oil barrel (31), a waste oil valve (32) and a waste oil pump (33), the oil outlet of the waste oil barrel (31) being connected to the input end of the waste oil valve (32), the oil inlet of the waste oil barrel (31) being connected to the output end of the waste oil pump (33), the input end of the waste oil pump (33) being further connected to a waste oil extraction pipe (35), and the output end of the waste oil pump (33) being further connected to a waste oil discharge pipe (36); and a control component (4), wherein the control component (4) comprises a main controller (41), an operation screen (42) and a power supply (43) arranged on the box body (1).

2. The lubricating oil replacement device for an EMU air compressor according to claim 1 is characterized in that: The oil outlet of the new oil barrel (21) passes through the new oil pump (23) and the new oil filling pipe (25) to form a new oil filling pipeline, and the lubricating oil in the new oil barrel (21) is added to the lubricating oil tank of the air compressor through the new oil filling pipeline; The new oil replenishing pipe (26) passes through the new oil pump (23) and forms a new oil replenishing pipeline with the oil inlet of the new oil barrel (21), and the external new lubricating oil is replenished into the new oil barrel (21) through the new oil replenishing pipeline.

3. The lubricating oil replacement device for an EMU air compressor according to claim 2, characterized in that: The new oil valve (22) is a normally closed electromagnetic valve, comprising a new oil valve (22a), b new oil valve (22b), c new oil valve (22c) and d new oil valve (22d); The a new oil valve (22a) is arranged at the oil outlet of the new oil barrel (21), the b new oil valve (22b) is arranged on the new oil replenishing pipe (26), the c new oil valve (22c) is arranged at the oil inlet of the new oil barrel (21), and the d new oil valve (22d) is arranged on the new oil filling pipe (25); When the new oil barrel (21) delivers new lubricating oil to the air compressor lubricating oil tank, the a new oil valve (22a) is connected to the d new oil valve (22d), the b new oil valve (22b) is disconnected from the c new oil valve (22c), and the output end of the new oil filling pipe (25) is placed in the air compressor lubricating oil tank; When external new lubricating oil is replenished into the new oil barrel (21), the b new oil valve (22b) is connected to the c new oil valve (22c), the a new oil valve (22a) is disconnected from the d new oil valve (22d), and the input end of the new oil replenishing pipe (26) is arranged in the external new oil barrel.

4. The lubricating oil replacement device for an EMU air compressor according to claim 1, characterized in that: A new oil flow meter (24) is also installed at the output end of the new oil pump (23); The output end of the new oil filling pipe (25) is provided with a hook, and the output end of the new oil filling pipe (25) is also provided with a liquid level sensor at the oil nozzle.

5. A lubricating oil replacement device for an EMU air compressor according to any one of claims 1 to 4, characterized in that: The waste oil extraction pipe (35) passes through the waste oil pump (33) and forms a waste oil extraction pipeline with the oil inlet of the waste oil barrel (31), and the waste lubricating oil in the lubricating oil tank of the air compressor is extracted into the waste oil barrel (31) through the waste oil extraction pipeline; The waste oil discharge pipe (36) passes through the waste oil pump (33) and forms a waste oil discharge pipeline with the oil inlet of the external waste oil barrel, and the waste lubricating oil in the waste oil barrel (31) is discharged into the external waste oil barrel through the waste oil discharge pipeline.

6. The lubricating oil replacement device for an EMU air compressor according to claim 5, characterized in that: The waste oil valve (32) is a normally closed solenoid valve, comprising a waste oil valve (32a), b waste oil valve (32b), c waste oil valve (32c) and d waste oil valve (32d); The waste oil valve a (32a) is arranged at the oil outlet of the waste oil barrel (31), the waste oil valve b (32b) is arranged on the waste oil discharge pipe (36), the waste oil valve c (32c) is arranged at the oil inlet of the waste oil barrel (31), and the waste oil valve d (32d) is arranged on the waste oil extraction pipe (35); When the waste oil barrel (31) transports waste lubricating oil to an external waste oil barrel, the waste oil valve a (32a) is connected to the waste oil valve d (32d), the waste oil valve b (32b) is disconnected from the waste oil valve c (32c), and the output end of the waste oil discharge pipe (36) is placed in the external waste oil barrel; When the waste lubricating oil in the lubricating oil tank of the air compressor is pumped into the waste oil barrel (31), the waste oil valve b (32b) is connected to the waste oil valve c (32c), the waste oil valve a (32a) is disconnected from the waste oil valve d (32d), and the input end of the waste oil extraction pipe (35) is arranged in the lubricating oil tank of the air compressor.

7. The lubricating oil replacement device for an EMU air compressor according to claim 5, characterized in that: The output end of the waste oil pump (33) is also equipped with a waste oil flow meter (34); The input end of the waste oil extraction pipe (35) is also provided with a hydraulic pressure sensor.

8. The lubricating oil replacement device for an EMU air compressor according to claim 5, characterized in that: A sewage outlet is provided at the bottom of the waste oil barrel (31), a detachable end cover is provided at the bottom of the sewage outlet, and a sewage valve is provided between the sewage outlet and the bottom of the waste oil barrel (31), and the sewage valve is a normally open electromagnetic valve; A filter (37) is also installed on the waste oil extraction pipe (35).

9. The lubricating oil replacement device for an EMU air compressor according to claim 5, characterized in that: The waste oil extraction pipe (35) is also covered with an oil scraper sleeve (38); The oil scraper sleeve (38) is provided with a hollow shaft sleeve on the outside and a plurality of oil scraper plates on the inside. The oil scraper plates are arranged in an inverted cone shape, and the cone portion is in close contact with the outer tube wall of the waste oil extraction pipe (35); The rear end of the oil scraper sleeve (38) is also provided with a cavity, in which replaceable oil absorbing cotton is installed.

10. The lubricating oil replacement device for an EMU air compressor according to claim 9, characterized in that: The main controller (41) comprises a main control chip and a relay group; The new oil valve (22), the new oil pump (23), the new oil flow meter (24), the liquid level sensor, the waste oil valve (32), the waste oil flow meter (34) and the hydraulic sensor are all connected to the main controller (41) by signal; The operation panel (42) is signal-connected to the main controller (41).

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