An engine oil replacement workstation

Abstract

An engine oil replacement workstation is provided with a plurality of oil replacement stations, a waste oil suction system, a new oil filling system, a positive and negative pressure gas supply system and an Internet of Things intelligent control system; the positive and negative pressure gas supply system is provided with a positive and negative pressure integrated screw air compressor, a gas storage tank, a vacuum tank, a positive pressure gas delivery pipeline and a negative pressure gas delivery pipeline, the positive and negative pressure integrated screw air compressor is composed of a motor and a screw pump, the output end of the screw pump is connected to the gas storage tank, the input end of the screw pump is connected to the vacuum tank, the gas storage tank is connected to the waste oil suction system and the new oil filling system through the positive pressure gas delivery pipeline, and the vacuum tank is connected to the waste oil suction system through the negative pressure gas delivery pipeline. The present invention solves the problems that waste oil is difficult to be exhausted, the environment is polluted, and the amount of new oil added cannot be accurately controlled during the engine oil replacement process, and achieves the purpose of improving work efficiency and oil change quality and reducing vehicle maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile engine maintenance and repair, and in particular to an engine oil replacement workstation that realizes efficient intelligent control in an interactive manner with the Internet of Things. Background Art

[0002] Automobile engine oil is the "blood" that maintains the "life" of the engine. It ensures the normal operation of the engine parts through cooling and lubrication. In order to extend the working life of the engine, the engine oil usually needs to be replaced regularly or after the vehicle has traveled a certain mileage.

[0003] At present, when changing the engine oil, the car is first driven to the designated position, and the staff lifts the car to a certain height by lifting equipment, and places a waste oil container on the ground directly below the engine oil drain bolt. The oil drain bolt is opened, and the waste oil is discharged from the oil drain port into the waste oil container by its own gravity. When there is no waste oil flowing out of the oil drain port, the oil drain port is sealed with the oil drain bolt, and the car is lowered to the ground to complete the waste oil removal operation; then the engine oil filling port is opened, and a funnel is placed, and the staff holds the oil barrel and pours the oil into the oil filling port. During the oil filling process, the oil filling amount needs to be detected by pulling out the oil dipstick and observing the oil level.

[0004] The above-mentioned engine oil replacement process adopts a manual operation mode, which requires a lot of manpower and time. Not only is the work efficiency low, but there are also the following defects: first, since the waste oil contains impurities such as iron filings, it has poor fluidity and is difficult to be discharged by its own gravity, which affects the quality of oil change; second, since the top of the waste oil container is open, it is easy for waste oil to spill and pollute the working environment; third, when adding new oil, the amount of oil injected is estimated by pulling up the oil dipstick to observe the oil level height, and the amount of oil added cannot be accurately controlled. In addition, under normal circumstances, it takes several times to pull up the oil dipstick to complete the operation of adding new oil to a car engine, which makes each car filling The new oil operation cannot be completed in one go; fourth, current automobile manufacturers have designed an engine guard plate at the bottom of the engine. During the engine oil change process, the engine lower guard plate must be disassembled and assembled. However, the working hours required for disassembly and assembly of the engine lower guard plate alone are 2-4 times the working hours for engine oil change (due to design differences among manufacturers, the time required for disassembly and assembly of the guard plate is also different). This is not only contrary to the concept of convenient, fast and efficient maintenance work, but every minute wasted will lead to an increase in maintenance costs; fifth, managers and customers cannot effectively supervise the engine oil change process, and it is difficult to achieve the effect of open maintenance. Summary of the invention

[0005] The present invention provides an engine oil change workstation controlled by an Internet of Things intelligent management system, aiming to solve the problems of low working efficiency, difficulty in draining waste oil, environmental pollution, and inability to accurately control the amount of new oil added in the existing engine oil change process, so as to achieve the purpose of improving work efficiency, reducing engine maintenance costs, realizing open maintenance, and meeting customer experience requirements.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] An engine oil change workstation is provided with a plurality of oil change stations, a waste oil suction system, a new oil filling system, a positive and negative pressure gas supply system for supporting the waste oil suction system and the new oil filling system, and an Internet of Things intelligent control system; the positive and negative pressure gas supply system is provided with a positive and negative pressure integrated screw air compressor, a gas storage tank, a vacuum tank, a positive pressure gas delivery pipeline and a negative pressure gas delivery pipeline, the positive and negative pressure integrated screw air compressor is composed of a motor and a screw pump, and the screw pump is driven by the motor to operate, the input end of the screw pump is connected to the vacuum tank, and the output end of the screw pump is connected to the gas storage tank, the gas storage tank is connected to the waste oil suction system and the new oil filling system through the positive pressure gas delivery pipeline, and the vacuum tank is connected to the waste oil suction system through the negative pressure gas delivery pipeline.

[0008] The above-mentioned engine oil change workstation, the waste oil suction system includes an oil extraction gun, a waste oil pot, a waste oil collection pipeline and a waste oil collection tank. The oil extraction gun and the waste oil pot are arranged in a group at each oil change station, the oil outlet of the oil extraction gun is connected with the oil inlet of the waste oil pot, a liquid level gauge is provided on the side wall of the waste oil pot, and an oil drain port is provided at the bottom of the waste oil pot. The oil drain port is connected to the waste oil collection tank through the waste oil collection pipeline. When performing the waste oil cleaning operation, the oil extraction gun is inserted to the bottom of the engine oil pan through the engine oil dipstick channel.

[0009] The above-mentioned engine oil change workstation, the new oil filling system includes an oil filling gun, an oil storage tank and an oil filling pipeline. The oil filling gun is arranged in a group at each oil change station, and the oil inlet of the oil filling gun is connected to the oil storage tank through the oil filling pipeline. When performing the new oil filling operation, the oil filling gun is inserted into the oil filling port of the engine.

[0010] The above-mentioned engine oil change workstation has an air inlet and an air outlet on the top of the waste oil pot of the waste oil suction system, and an air inlet on the top of the oil storage tank of the new oil filling system; a plurality of positive-pressure branch air circuits are connected in parallel on the positive-pressure gas transmission pipeline, wherein each of the positive-pressure branch air circuits is communicated with the air inlet on the top of a waste oil pot or the air inlet arranged on the top of the oil storage tank; a plurality of negative-pressure branch air circuits are connected in parallel on the negative-pressure gas transmission pipeline, wherein each of the negative-pressure branch air circuits is communicated with the air outlet on the top of a waste oil pot.

[0011] The above-mentioned engine oil replacement workstation is provided with an oil-gas separator at the connection between the air outlet on the top of each group of waste oil tanks and the negative pressure branch air path, and the oil outlet of the oil-gas separator is connected to the waste oil collection pipeline.

[0012] The above-mentioned engine oil change workstation, the top of the waste oil pot is also provided with an auxiliary air inlet; the positive and negative pressure gas supply system is also provided with an auxiliary positive pressure gas delivery pipeline, the auxiliary positive pressure gas delivery pipeline is directly connected to the output end of the screw pump, and a number of auxiliary positive pressure branch gas circuits are connected in parallel on the auxiliary positive pressure gas delivery pipeline; the auxiliary positive pressure branch gas circuits are respectively connected to the auxiliary air inlet of a waste oil pot in the waste oil suction system, and a vacuum generator is arranged at the interface between the auxiliary air inlet of each group of waste oil pots and the auxiliary positive pressure branch gas circuit.

[0013] In the above-mentioned engine oil replacement workstation, the screw pump in the positive and negative pressure gas supply system is also provided with an auxiliary air intake pipeline connected to the atmosphere, and an air filter is arranged on the auxiliary air intake pipeline.

[0014] In the above-mentioned engine oil change workstation, the oil storage tanks of the new oil filling system are arranged in several groups, which are used to hold oils of different brands respectively. An air inlet connected to compressed air is arranged on the top of each group of oil storage tanks, and a first oil inlet channel and a second oil inlet channel are arranged in parallel in each group of oil storage tanks, and an oil pump is arranged in the second oil inlet channel.

[0015] The above-mentioned engine oil replacement workstation, the Internet of Things intelligent control system is equipped with a central processing unit, a scanner, a sensor, an oil pump control switch, a motor control switch, a vacuum generator control switch and an electromagnetic control valve; the scanner is used to collect vehicle information of the engine oil to be replaced, and the output port of the scanner is connected to the input port of the central processing unit; the sensor includes an oil volume sensor arranged at the bottom of the waste oil pot, a pressure sensor arranged on the side wall of the gas storage tank, a vacuum degree sensor arranged on the side wall of the vacuum tank, and a flow sensor arranged on the oil filling pipeline, and the signal output end of each sensor is respectively connected to the signal input end of the central processing unit; the electromagnetic control valve is provided with several groups , respectively arranged in the positive pressure gas delivery pipeline, the positive pressure branch gas circuit, the negative pressure gas delivery pipeline, the negative pressure branch gas circuit, the auxiliary positive pressure gas delivery pipeline, the auxiliary positive pressure branch gas circuit, the first oil inlet channel, the second oil inlet channel and the oil discharge port of the waste oil tank; the vehicle identification information is pre-stored in the central processing unit, and the signal output end of the central processing unit is connected to the oil pump control switch, the motor control switch, the vacuum generator control switch and the electromagnetic control valve. After the central processing unit analyzes and judges the signals collected by the scanner and the sensor, it sends action instructions to the oil pump control switch, the motor control switch, the vacuum generator control switch and the corresponding electromagnetic control valve to control the switching of the working state of each oil change station.

[0016] The above-mentioned engine oil change workstation is equipped with a high-definition camera at each oil change station. The signal output end of the high-definition camera is connected to the signal input end of the central processing unit, and a communication module for interacting with the Internet of Things is provided on the central processing unit chip. The client can monitor the entire oil change process through the mobile phone APP.

[0017] The present invention provides an engine oil replacement workstation, which is provided with a plurality of oil replacement stations. At each of the oil replacement stations, the waste oil to be replaced in the engine can be first sucked into the waste oil pot through an oil extraction gun. When the amount of waste oil in the waste oil pot reaches a set value, the waste oil in the waste oil pot is transported to the waste oil collection tank through a waste oil collection pipeline; and then new oil of a matching brand is injected into the engine through an oil injection gun. In the above oil replacement process, since the lifting operation of the vehicle is not required, the operation time is saved and the work efficiency is improved.

[0018] During the waste oil suction process of the present invention, the oil suction gun is inserted into the bottom of the engine oil pan through the engine oil dipstick channel, and at the same time, a negative pressure is formed in the inner cavity of the waste oil pot by relying on the positive and negative pressure gas supply system, so that the waste oil is smoothly sucked into the waste oil pot, so that the waste oil in the engine can be completely discharged within the set suction time; in addition, since the waste oil always flows in a closed pipeline, the problem of polluting the working environment due to spillage is avoided; the present invention also arranges a liquid level gauge on the side wall of the waste oil pot, which can accurately display the amount of waste oil extracted, and the staff compares the amount of waste oil extracted with the calibrated engine oil filling amount, thereby judging whether the engine has the phenomenon of burning oil.

[0019] During the new oil injection process, the present invention can identify vehicle information through the scanner in the Internet of Things intelligent control system to determine the brand of engine oil to be added, and control the oil supply channel in the matching oil storage tank to connect the oil supply pipeline to realize automatic selection of the engine oil brand, and can send the engine oil filling amount information to the central processing unit through the flow sensor arranged in the oil supply pipeline. When the new engine oil filling amount reaches the set value, the central processing unit sends a disconnection command to the electromagnetic control valve of the oil supply channel, thereby not only accurately controlling the engine oil filling amount, but also ensuring that the new oil filling operation is completed in one time.

[0020] The present invention also equips each workstation with a high-definition camera, which can upload the captured images through the communication module on the central processing unit chip that interacts with the Internet of Things. The client can monitor the entire oil change process through the mobile phone APP, which not only ensures the standardization and normalization of the operation process, but also achieves the effect of open maintenance and enhances the customer experience.

[0021] The positive and negative pressure gas supply system of the present invention adopts a positive and negative pressure integrated screw air compressor, an air storage tank, a vacuum tank, a positive pressure gas delivery pipeline and a negative pressure gas delivery pipeline coordination structure. It can not only simultaneously meet the compressed air and vacuum negative pressure requirements of each oil change station, but also provide compressed air and vacuum negative pressure in different ways under different working conditions, thereby greatly reducing the equipment operating cost.

[0022] In summary, the present invention solves the problems of waste oil being difficult to drain out, environmental pollution, and the inability to accurately control the amount of new oil added during engine oil replacement, thereby achieving the purpose of improving work efficiency, reducing engine maintenance costs, realizing open maintenance, and meeting customer experience requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall layout of the engine oil replacement workstation of the present invention;

[0024] Figure 2 This is the working process diagram of waste oil suction of positive and negative pressure gas supply system under the first working condition;

[0025] Figure 3 This is the working process diagram of waste oil suction of positive and negative pressure gas supply system under the second working condition;

[0026] Figure 4 This is the working process diagram of waste oil suction of positive and negative pressure gas supply system under the third working condition;

[0027] Figure 5 It is a work flow chart for adding new oil by relying on the positive pressure gas delivery pipeline in the positive and negative pressure gas supply system;

[0028] Figure 6 It is a work flow chart for adding new oil by relying on the auxiliary positive pressure gas delivery pipeline in the positive and negative pressure gas supply system;

[0029] Figure 7 This is a working diagram of adding new oil through the oil pump;

[0030] Figure 8 It is a schematic diagram of the control principle of the Internet of Things intelligent control system.

[0031] The list of numbers in the figure is: 1. Vacuum tank, 2. Motor, 3. Screw pump, 4. Gas storage tank, 5. Liquid level meter, 6. Oil sensor, 7. Waste oil pot, 8. Waste oil collection pipeline, 9. Waste oil collection tank, 10. Oil storage tank, 11. First oil inlet channel, 12. Second oil inlet channel, 13. Oil pump, 14. Flow sensor, 15. Oil filling pipeline, 16. Positive pressure gas delivery pipeline, 17. Positive pressure branch gas line, 18. Engine oil pan, 19. Oil filling gun, 20. Oil extraction gun, 21. Auxiliary positive 1. high-pressure gas delivery pipeline, 22. negative-pressure branch pipeline, 23. negative-pressure gas delivery pipeline, 24. auxiliary positive-pressure branch gas line, 25. vacuum generator, 26. oil-gas separator, 27. safety valve, 28. pressure sensor, 29. auxiliary air intake pipeline, 30. air filter, 31. vacuum sensor, 22. solenoid control valve, 33. scanner, 34. high-definition camera, 35. oil pump control switch, 36. motor control switch, 37. vacuum generator control switch, 38. central processing unit. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figure 1 The present invention provides an engine oil replacement workstation, which is provided with a plurality of oil replacement stations, a waste oil suction system, a new oil filling system, and a positive and negative pressure gas supply system for supporting the waste oil suction system and the new oil filling system; the positive and negative pressure gas supply system is provided with a positive and negative pressure integrated screw air compressor, a gas storage tank 4, a vacuum tank 1, a positive pressure gas delivery pipeline 16, a negative pressure gas delivery pipeline 23, an auxiliary positive pressure gas delivery pipeline 21 and an auxiliary air intake pipeline 29, the positive and negative pressure integrated screw air compressor It consists of a motor 2 and a screw pump 3, which is driven by the motor 2 to operate. The input end of the screw pump 3 is connected to the vacuum tank 1 or to the atmosphere through an auxiliary air intake pipeline 29, and the output end of the screw pump 3 is connected to a gas storage tank 4. The gas storage tank 4 can be connected to the waste oil suction system and the new oil filling system through a positive pressure gas delivery pipeline 16, and can also be connected to the waste oil suction system and the new oil filling system through an auxiliary positive pressure gas delivery pipeline 21. The vacuum tank 1 is connected to the waste oil suction system through a negative pressure gas delivery pipeline 23.

[0034] See also Figure 1The engine oil replacement workstation of the present invention has a waste oil suction system including an oil extraction gun 20, a waste oil pot 7, a waste oil collection pipeline 8 and a waste oil collection tank 9. The oil extraction gun 20 and the waste oil pot 7 are arranged in a group at each oil replacement station. The oil discharge port of the oil extraction gun 20 is connected to the oil inlet of the waste oil pot 7. The top of the waste oil pot 7 is provided with an air inlet, an auxiliary air inlet and an air outlet respectively connected to the positive pressure gas delivery pipeline 16, the auxiliary positive pressure gas delivery pipeline 21 and the negative pressure gas delivery pipeline 23. The bottom of the waste oil pot 7 is provided with an oil discharge port, which is connected to the waste oil collection tank 9 through the waste oil collection pipeline 8, and a liquid level gauge 5 is provided on the side wall of the waste oil pot 7. When performing the waste oil removal operation, the oil extraction gun 20 is inserted to the bottom of the engine oil pan 18 through the engine oil dipstick channel.

[0035] See also Figure 1 The engine oil replacement workstation described in the present invention has an auxiliary positive pressure gas delivery pipeline 21 that is connected to the auxiliary air inlet of a waste oil pot 7 in the waste oil suction system through an auxiliary positive pressure branch air circuit 24, and a vacuum generator 25 is arranged at the interface between each group of waste oil pot auxiliary air inlet and the auxiliary positive pressure branch air circuit 24. When the waste oil suction system is under a small load condition or the screw pump 3 is under a condition of exhaust gas discharge, a negative pressure can be formed in the waste oil pot 7 through the vacuum generator 25, thereby ensuring the completion of the waste oil suction operation, thereby achieving resource recycling, and fully reflecting the advantages of the present invention in energy saving and environmental protection.

[0036] See also Figure 1 The engine oil replacement workstation of the present invention has a new oil filling system including an oil filling gun 19, an oil storage tank 10 and an oil filling pipeline 15; a plurality of oil storage tanks 10 are provided, each of which is used to contain oils of different brands. A first oil inlet channel 11 and a second oil inlet channel 12 are provided in parallel in each oil storage tank 10, and an oil pump 13 is provided in the second oil inlet channel 12, and an air inlet connected to compressed air is provided at the top of each oil storage tank 10; a group of oil filling guns 19 are arranged at each oil replacement station, and the oil inlet of the oil filling gun 19 is connected to the oil storage tank 10 through the oil filling pipeline 15. When performing the new oil filling operation, the oil filling gun 19 is inserted into the oil filling port of the engine.

[0037] See also Figure 1 The engine oil replacement workstation described in the present invention has a plurality of positive-pressure branch gas circuits 17 connected in parallel on the positive-pressure gas delivery pipeline 16, wherein each positive-pressure branch gas circuit 17 is communicated with an air inlet at the top of a waste oil pot 7 or a compressed air inlet arranged at the top of the oil storage tank 10; a plurality of negative-pressure branch gas circuits 22 are connected in parallel on the negative-pressure gas delivery pipeline 23, wherein each negative-pressure branch gas circuit 22 is communicated with an air outlet at the top of a waste oil pot 7, and an oil-gas separator 26 is arranged at the connection between the air outlet at the top of the waste oil pot 7 and the negative-pressure branch gas circuit 22.

[0038] See also Figure 1 , Figure 8 The engine oil replacement workstation of the present invention has an Internet of Things intelligent control system provided with a central processing unit 38, a scanner 33, a sensor, an oil pump control switch 35, a motor control switch 36 and an electromagnetic control valve 32; the scanner 33 is used to collect vehicle information of the engine oil to be replaced, and the output port of the scanner 33 is connected to the input port of the central processing unit 38; the sensor includes an oil volume sensor 6 arranged at the bottom of the waste oil pot 7, a pressure sensor 28 arranged on the side wall of the gas storage tank 4, a vacuum degree sensor 31 arranged on the side wall of the vacuum tank 1, and a flow sensor 14 arranged on the oil filling pipeline 15, and the signal output end of each sensor is respectively connected to the signal input end of the central processing unit 38; the electromagnetic control valve 32 is provided in several groups, which are electromagnetic control valve 32 (f) arranged on the positive pressure gas delivery pipeline 16, electromagnetic control valves 32 (v), 32 (w), 32 (x), 32 (o), 32 (l), 32 (h) arranged on the positive pressure branch gas line 17, and electromagnetic control valve 32 arranged on the negative pressure gas delivery pipeline 23. (a), electromagnetic control valves 32(n), 32(k), 32(g) arranged on the negative pressure branch gas circuit 22, electromagnetic control valve 32(d) arranged on the auxiliary positive pressure gas delivery pipeline 21, electromagnetic control valves 32(p), 32(r), 32(t) arranged on the first oil inlet channel 11, electromagnetic control valves 32(q), 32(s), 32(u) arranged on the second oil inlet channel 12 and electromagnetic control valves 32(i), 32(j), 32(m) arranged at the oil outlet of the waste oil tank 7, all The electromagnetic control valves 32 are all one-way flow valves; the vehicle identification information is pre-stored in the central processing unit 38, and the signal output end of the central processing unit 38 is connected to the oil pump control switch 35, the motor control switch 36, the vacuum generator switch 37 and the electromagnetic control valve 32. After the central processing unit 38 analyzes and judges the signals collected by the scanner 33 and the sensor, it sends action instructions to the oil pump control switch 35, the motor control switch 36, the vacuum generator switch 37 and the corresponding electromagnetic control valve 32 to control the switching of the working state of each oil change station.

[0039] See also Figure 1 , Figure 8 The engine oil change workstation described in the present invention is also equipped with a high-definition camera 34 at each oil change station. The signal output end of the high-definition camera 34 is connected to the signal input end of the central processing unit 38, and a communication module for interacting with the Internet of Things is provided on the central processing unit 38 chip. The client can monitor the entire oil change process through a mobile phone APP.

[0040] See also Figure 1 , Figure 2 , Figure 8 In the engine oil replacement workstation of the present invention, under normal working conditions, when performing waste oil removal operations, the electromagnetic control valve 32(f) arranged on the positive pressure gas delivery pipeline 16, the electromagnetic control valve 32(v) or 32(w) or 32(x) and 32(o) or 32(l) or 32(h) arranged on the positive pressure branch gas line 17, the electromagnetic control valve 32(a) arranged on the negative pressure gas delivery pipeline 23, and the electromagnetic control valve 32(n) or 32(k) or 32(g) arranged on the negative pressure branch gas line 22 are in an open state, and positive pressure gas is injected into the waste oil pot 7 through the positive pressure gas delivery pipeline 16 and the positive pressure branch gas line 17, and the gas in the waste oil pot 7 flows to the vacuum tank 1 through the negative pressure branch pipeline 22 and the negative pressure gas delivery pipeline 23, thereby forming a negative pressure in the waste oil pot 7, so that the waste oil is smoothly sucked into The waste oil in the waste oil pot 7 is separated by the oil-gas separator 26 so that the atomized oil mixed in the negative pressure branch gas path 22 can flow into the waste oil collection pipeline. Therefore, the waste oil in the engine can be completely discharged within the set suction time. At the same time, the amount of waste oil extracted can be accurately displayed by the liquid level meter 5 arranged on the side wall of the waste oil pot 7. The staff compares the amount of waste oil extracted with the calibrated engine oil filling amount, thereby judging whether the engine has the phenomenon of burning oil. When the waste oil in the waste oil pot 7 reaches a certain amount, the oil amount sensor 6 arranged at the bottom of the waste oil pot 7 sends a signal to the central processor 38, and the central processor 38 sends an opening action instruction to the electromagnetic control valve 32 (i) or 32 (j) or 32 (m) arranged at the oil discharge port of the waste oil pot 7, and the waste oil in the waste oil pot 7 flows into the waste oil collecting tank 9 through the waste oil collection pipeline 8.

[0041] See also Figure 1 , Figure 3 , Figure 8In the engine oil replacement workstation of the present invention, during the waste oil suction process, when the gas pressure in the vacuum tank 1 is between 0.6 and 0.8 atmospheres, the electromagnetic control valve 32(b) at the air outlet of the vacuum tank 1 is closed, and the input end of the screw pump 3 is supplied with air by the auxiliary air intake pipeline 29. At this time, the electromagnetic control valve 32(c) arranged on the auxiliary air intake pipeline 29, the electromagnetic control valve 32(f) arranged on the positive pressure gas delivery pipeline 16, the electromagnetic control valve 32(v) or 32(w) or 32(x) and 32(o) or 32(l) or 32(h) arranged on the positive pressure branch gas line 17, the electromagnetic control valve 32(a) arranged on the negative pressure gas delivery pipeline 23, and the electromagnetic control valve 32(c) arranged on the negative pressure branch gas line 22 are closed. (n) or 32(k) or 32(g) is in the open state, positive pressure gas is injected into the waste oil pot 7 through the positive pressure gas delivery pipeline 16 and the positive pressure branch gas pipeline 17, and the gas in the waste oil pot 7 flows to the vacuum tank 1 through the negative pressure branch pipeline 22 and the negative pressure gas delivery pipeline 23. The output end of the screw pump 3 injects compressed gas into the waste oil pot 7 through the positive pressure gas delivery pipeline 16 and the positive pressure branch gas pipeline 17, and the gas in the waste oil pot 7 flows to the vacuum tank 1 through the negative pressure branch pipeline 22 and the negative pressure gas delivery pipeline 23, thereby forming a negative pressure in the waste oil pot 7, so that the waste oil is smoothly sucked into the waste oil pot 7, and the atomized engine oil mixed in the negative pressure branch gas pipeline 22 is separated by the oil-gas separator 26 and flows into the waste oil collection pipeline.

[0042] See also Figure 1 , Figure 4 , Figure 8 In the engine oil replacement workstation described in the present invention, during the waste oil suction process, when the compressed gas pressure in the air storage tank 4 reaches 6 atmospheres, the electromagnetic control valve 32(a) at the air inlet of the vacuum tank 1 and the electromagnetic control valve 32(b) at the air outlet are both closed, and the electromagnetic control valve 32(c) arranged on the auxiliary air inlet pipeline 29 and the electromagnetic control valve 32(d) arranged on the auxiliary positive pressure gas delivery pipeline 21 are opened. At this time, the input end of the screw pump 3 is supplied with air by the auxiliary air inlet pipeline 29, and the output end of the screw pump 3 injects the compressed gas into the waste oil pot 7 through the auxiliary positive pressure gas delivery pipeline 21, the auxiliary positive pressure branch air path 24 and the auxiliary air inlet arranged at the top of the waste oil pot 7, and forms a negative pressure in the waste oil pot 7 through the vacuum generator 25 arranged at the auxiliary air inlet at the top of the waste oil pot 7, so that the waste oil is smoothly sucked into the waste oil pot 7.

[0043] See also Figure 1 , Figure 5 , Figure 8In the engine oil replacement workstation of the present invention, during the process of adding new oil, the central processor 38 selects a corresponding brand of oil storage tank 10 to add new oil to the engine oil pan 18 according to the vehicle identification information collected by the scanner 33. In the first embodiment of the new oil filling system, the gas storage tank 4 provides compressed air to the oil storage tank 10 through the positive pressure gas delivery pipeline 16 and the positive pressure branch gas path 17. At this time, the electromagnetic control valve 32 (f) arranged on the positive pressure gas delivery pipeline 16, the electromagnetic control valve 32 (v) arranged on the positive pressure branch gas path 17 or 3 2(w) or 32(x), the solenoid control valve 32(r) arranged on the first oil inlet channel 11 is opened, and the new engine oil enters the engine oil pan 18 through the oil filling pipeline 15 and the oil filling gun 19 inserted into the engine oil filling port, and the oil amount information of the new engine oil injected is transmitted to the central processor 38 in real time through the flow sensor 14. When the oil injection amount reaches the set value, the central processor 38 sends a closing command to the solenoid control valve 32(r) on the first oil inlet channel 11 and the solenoid control valve 32(f) on the positive pressure gas delivery pipeline 16 to complete the new engine oil filling operation.

[0044] See also Figure 1 , Figure 6 , Figure 8 In the second embodiment of the new oil filling system of the engine oil replacement workstation of the present invention, the air storage tank 4 provides compressed air to the oil storage tank 10 through the auxiliary positive pressure gas delivery pipeline 21 and the auxiliary positive pressure branch gas line 24, at which time the electromagnetic control valve 32 (f) arranged on the positive pressure gas delivery pipeline 16 is closed, and the electromagnetic control valve 32 (d) arranged on the auxiliary positive pressure gas delivery pipeline 21, the electromagnetic control valve 32 (v) or 32 (w) or 32 (x) arranged on the positive pressure branch gas line 17, and the electromagnetic control valve 32 (f) arranged on the positive pressure gas delivery pipeline 16 are closed. The electromagnetic control valve 32(r) on the oil inlet channel 11 is opened, and the new engine oil enters the engine oil pan 18 through the oil filling pipeline 15 and the oil filling gun 19 inserted into the engine oil filling port, and the oil amount information of the new engine oil injected is transmitted to the central processor 38 in real time through the flow sensor 14. When the oil injection amount reaches the set value, the central processor 38 sends a closing command to the electromagnetic control valve 32(r) on the first oil inlet channel 11 and the electromagnetic control valve 32(d) on the auxiliary positive pressure gas delivery pipeline 21 to complete the new engine oil filling operation.

[0045] See also Figure 1 , Figure 6 , Figure 8The third embodiment of the new oil filling system of the engine oil replacement workstation described in the present invention is to inject the new oil in the oil storage tank 10 into the engine oil pan 18 through the oil pump 13, the second oil inlet channel 12 and the oil filling gun 19, and transmit the oil amount information of the new oil injected to the central processor 38 in real time through the flow sensor 14. At this time, the electromagnetic control valves 32(q), 32(s), and 32(u) arranged on the second oil inlet channel 12 are opened. When the oil injection amount reaches the set value, the central processor 38 sends a closing command to the electromagnetic control valve 32(r) and the oil pump control switch 35 to complete the new oil filling operation.

Claims

1. An engine oil change workstation, equipped with a plurality of oil change stations, characterized in that: A waste oil suction system, a new oil filling system, a positive and negative pressure gas supply system for supporting the operation of the waste oil suction system and the new oil filling system, and an Internet of Things intelligent control system are also provided; the positive and negative pressure gas supply system is provided with a positive and negative pressure integrated screw air compressor, a gas storage tank (4), a vacuum tank (1), a positive pressure gas delivery pipeline (16), and a negative pressure gas delivery pipeline (23); the positive and negative pressure integrated screw air compressor is composed of a motor (2) and a screw pump (3); the screw pump (3) is driven by the motor (2) to operate; the input end of the screw pump (3) is connected to the vacuum tank (1), and the output end of the screw pump (3) is connected to the gas storage tank (4); the gas storage tank (4) is connected to the waste oil suction system and the new oil filling system through the positive pressure gas delivery pipeline (16); the vacuum tank (1) is connected to the waste oil suction system through the negative pressure gas delivery pipeline (23); The waste oil suction system comprises an oil extraction gun (20), a waste oil pot (7), a waste oil collection pipeline (8) and a waste oil collection tank (9). The oil extraction gun (20) and the waste oil pot (7) are arranged in a group at each oil replacement station. The oil discharge port of the oil extraction gun (20) is connected to the oil inlet of the waste oil pot (7). A liquid level gauge (5) is provided on the side wall of the waste oil pot (7). An oil discharge port is provided at the bottom of the waste oil pot (7). The oil discharge port is connected to the waste oil collection tank (9) through the waste oil collection pipeline (8). When performing a waste oil removal operation, the oil extraction gun (20) is inserted into the bottom of the engine oil pan (18) through the engine oil dipstick channel of the engine. The new oil filling system comprises a grease gun (19), an oil storage tank (10) and an oil filling pipeline (15); a group of the grease guns (19) are arranged at each oil replacement station; an oil inlet of the grease gun (19) is connected to the oil storage tank (10) via the oil filling pipeline (15); when performing a new oil filling operation, the grease gun (19) is inserted into the oil filling port of the engine; An air inlet and an air outlet are arranged on the top of the waste oil pot (7) of the waste oil suction system, and an air inlet is arranged on the top of the oil storage tank (10) of the new oil filling system; a plurality of positive pressure branch air paths (17) are connected in parallel to the positive pressure gas delivery pipeline (16), wherein each positive pressure branch air path (17) is communicated with an air inlet on the top of a waste oil pot (7) or an air inlet arranged on the top of the oil storage tank (10); a plurality of negative pressure branch air paths (22) are connected in parallel to the negative pressure gas delivery pipeline (23), wherein each negative pressure branch air path (22) is communicated with an air outlet on the top of a waste oil pot (7); An oil-gas separator (26) is provided at the connection between the air outlet at the top of each group of waste oil tanks (7) and the negative pressure branch air path (22), and the oil outlet of the oil-gas separator (26) is connected to the waste oil collection pipeline (8); The top of the waste oil pot (7) is also provided with an auxiliary air inlet; the positive and negative pressure gas supply system is also provided with an auxiliary positive pressure gas delivery pipeline (21), the auxiliary positive pressure gas delivery pipeline (21) is directly connected to the output end of the screw pump (3), and a plurality of auxiliary positive pressure branch gas paths (24) are connected in parallel to the auxiliary positive pressure gas delivery pipeline (21); the auxiliary positive pressure branch gas paths (24) are respectively connected to the auxiliary air inlet of a waste oil pot (7) in the waste oil suction system, and a vacuum generator (25) is provided at the interface between the auxiliary air inlet of each group of waste oil pots (7) and the auxiliary positive pressure branch gas path; The screw pump (3) in the positive and negative pressure gas supply system is also provided with an auxiliary air intake pipeline (29) connected to the atmosphere, and an air filter (30) is provided on the auxiliary air intake pipeline (29).

2. The engine oil replacement workstation according to claim 1, characterized in that: The new oil filling system comprises a plurality of groups of oil storage tanks (10) for containing engine oils of different grades, an air inlet for communicating with compressed air is arranged at the top of each group of oil storage tanks (10), a first oil inlet channel (11) and a second oil inlet channel (12) are arranged in parallel in each group of oil storage tanks (10), and an oil pump (13) is arranged in the second oil inlet channel (12).

3. The engine oil replacement workstation according to claim 1, characterized in that: The Internet of Things intelligent control system is provided with a central processing unit (38), a scanner (33), a sensor, an oil pump control switch (35), a motor control switch (36), a vacuum generator control switch (37) and an electromagnetic control valve (32); the scanner (33) is used to collect information about a vehicle whose engine oil is to be replaced, and an output port of the scanner (33) is connected to an input port of the central processing unit (38); the sensor comprises an oil volume sensor (6) arranged at the bottom of a waste oil pot (7), a pressure sensor (28) arranged on the side wall of a gas storage tank (4), a vacuum degree sensor (31) arranged on the side wall of a vacuum tank (1), and a flow sensor (14) arranged on an oil filling pipeline (15); the signal output end of each sensor is respectively connected to the signal input end of the central processing unit (38); the electromagnetic control valve (32) is provided in a plurality of groups, which are respectively arranged at the positive pressure gas delivery port (28) and the vacuum degree sensor (31) arranged on the side wall of a vacuum tank (1). The central processing unit (38) is connected to the oil pump control switch (35), the motor control switch (36), the vacuum generator control switch (37) and the electromagnetic control valve (32). After the central processing unit (38) analyzes and judges the signals collected by the scanner (33) and the sensor, it sends an action instruction to the oil pump control switch (35), the motor control switch (36), the vacuum generator control switch (37) and the corresponding electromagnetic control valve (32), so as to control the switching of the working state of each oil replacement station.

4. The engine oil replacement workstation according to claim 3, characterized in that: A high-definition camera (34) is arranged at each oil replacement station, a signal output end of the high-definition camera (34) is connected to a signal input end of a central processing unit (38), and a communication module for interacting with the Internet of Things is arranged on the chip of the central processing unit (38), so that a client can monitor the entire oil replacement process through a mobile phone APP.

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