Multifunctional environment-friendly lubricating oil trolley and external lubricating method for operation site of mechanical equipment

Abstract

The invention aims to provide a multifunctional environment-friendly lubricating oil trolley and an external lubricating method for a mechanical equipment operation site, and belongs to the field of lubrication. Various operations of lubricating oil outside a mechanical equipment operation site can be achieved, the equipment operation physical parameter requirements are met, operation is easy, and movement is convenient. According to the invention, newly unsealed lubricating oil can be transferred, purified, heated and filled, equipment operation lubricating oil can be extracted, purified, dewatered, filled and reused, newly-built equipment lubricating oil circulation, temporary external forced lubricating oil circulation, temporary external storage, buffer oil tank, oil seal, unsealing operation and the like. And all reserved process interfaces of the equipment adopt a quick-plug connector form, so that the working efficiency is improved. An independent electric cabinet is arranged, switch operation, protection display, operation display and parameter display are integrated, and the trolley can work only by being connected with an external power source. The problems that a conventional temporary lubricating oil tank is single in function and structure, large in oil gas pollution, high in electrical professional operation requirement, complex in external accessory equipment and the like are solved.

Description

Technical Field

[0001] The invention relates to a lubricating oil trolley and a lubricating method. Background Art

[0002] With the vigorous development of industrial construction, lubricating oils formed by adding other types of additives to a mixture of high molecular hydrocarbons and non-hydrocarbons extracted from crude oil are widely used in industrial equipment lubrication systems because of their good cleaning, cooling, lubrication, and stable properties. Lubricating oils are usually stored in metal barrels and transported by metal containers when used. However, large and precision equipment often have higher requirements for the filling amount and particle size of lubricating oils. Multiple devices are required to work together. Often these devices are composed of multiple single devices. At present, various construction sites have the following problems with lubricating oil treatment:

[0003] (1) Most of them are not equipped with a separate oil tank for lubricating oil transfer or temporary storage. Even if they are equipped with a simple small-capacity oil tank, they may need to be transferred several times during use. The oil tank body is equipped with a simple oil supply and return interface, resulting in a reduction in effective suction volume and low efficiency;

[0004] (2) The oil tank is not equipped with a circulating heating function and a corresponding heating protection function. If there is a requirement for lubricating oil temperature measurement, a simple measurement must be performed with the help of external equipment;

[0005] (3) No oil mist separator is installed. During the lubricating oil circulation process, a large amount of oil gas is generated and dispersed around the equipment, causing environmental pollution and flammable and explosive risks. At the same time, it also increases unnecessary lubricating oil loss;

[0006] (4) Most teams use vertical centrifugal pumps for lubricating oil circulation and filling operations because of their poor self-priming ability. When the oil flows from low to high, cavitation and idling may occur.

[0007] (5) The fuel tank internal and external suction or simple switching function is not perfect;

[0008] (6) The fuel tank body and other ancillary equipment are mostly single-unit structures, and other machinery is required to transport them during transportation, which takes a long time to disassemble and connect;

[0009] (7) Equipment with high requirements on lubricating oil particle size needs to be connected to other purification equipment;

[0010] (8) The flow process and state changes of the lubricating oil are not visible;

[0011] (9) Most equipment reserved interfaces are flange or threaded interfaces;

[0012] (10) The operation of the oil tank and the pump is coordinated. Without liquid level control, oil overflow or vacuum may occur;

[0013] (11) The explosion-proof levels of the electrical equipment are uneven and are not suitable for explosion-proof restricted areas;

[0014] (12) There is no independent electrical box and no corresponding protection control circuit. Professional electricians are required to perform overall connection and debugging during each use. Summary of the invention

[0015] The purpose of the present invention is to provide a multifunctional environmentally friendly lubricating oil trolley and an external lubrication method for a mechanical equipment operation site with the functions of extraction, suction, discharge, supply, purification, heating, oil and gas purification, and interlocking protection.

[0016] The object of the present invention is achieved in that:

[0017] The present invention discloses a multifunctional environmentally friendly lubricating oil trolley, which is characterized by comprising an oil tank, an oil mist separator, a magnetic flap level gauge, a Y-type filter, a gear pump, a filter, a filter pipe, a pipe sight glass, and a first to an eleventh ball valve. The oil mist separator is connected to the oil tank through the first ball valve, and the oil return pipe of the external equipment is connected to the oil tank through the second ball valve. The two ends of the magnetic flap level gauge are respectively connected to the oil tank through the upper connecting ball valve and the lower connecting ball valve. The lower end of the magnetic flap level gauge is also connected to the first needle valve, and the side of the oil tank is connected to the second needle valve. An electric heater is arranged in the oil tank, the top of the oil tank is connected to the pipe above the oil tank, the bottom of the oil tank is connected to the pipe below the oil tank, the pipe above the oil tank is connected to the pipe below the oil tank, a third ball valve is installed on the pipe above the oil tank, and the pipe below the oil tank is connected to the pipe below the oil tank. The end of the pipeline is connected to the oil supply pipeline of the external equipment through the fourth ball valve. The Y-type filter, gear pump, filter and pipeline sight glass are installed in sequence on the pipeline below the oil tank from the oil tank to the fourth ball valve. The two ends of the filter pipeline are respectively connected to the pipeline below the oil tank before and after the filter. The eighth ball valve and the fifth ball valve are respectively installed on the pipeline below the oil tank before and after the filter. The sixth ball valve is installed on the filter pipeline, and the seventh ball valve is extended between the filter and the fifth ball valve. The tenth ball valve is installed on the pipeline below the oil tank between the Y-type filter and the oil tank, and the ninth ball valve is extended between the tenth ball valve and the Y-type filter. The oil tank is connected to a sewage pipeline, and the eleventh ball valve is installed on the sewage pipeline; the first pressure gauge is installed at the front end of the pipeline sight glass, and the second pressure gauge is installed between the filter and the eighth ball valve.

[0018] The multifunctional environmentally friendly lubricating oil trolley of the present invention may also include:

[0019] 1. It also includes a safety valve, which is respectively connected to the oil tank and the pipeline below the oil tank.

[0020] The external lubrication method for the operation site of mechanical equipment of the present invention is characterized by: using the multifunctional environmentally friendly lubricating oil trolley as claimed in claim 1; when refilling the lubricating oil tank: opening the first ball valve for returning the oil of the oil mist separator to the oil tank, opening the magnetic flap liquid level gauge connecting ball valve, confirming that the first needle valve for the magnetic flap liquid level gauge to discharge residual liquid and the second needle valve for the oil tank sampling valve are closed; closing the eleventh ball valve for draining sewage from the oil tank, opening the ninth ball valve for the pump to inhale external lubricating oil, checking the Y-type filter for filtering large particles of impurities in the lubricating oil, opening the sixth ball valve and the third ball valve, closing the eighth ball valve, the fifth ball valve and the fourth ball valve, starting the gear pump power supply, and drawing lubricating oil from the outside and injecting it into the trolley body oil tank.

[0021] The external lubrication method for the mechanical equipment operation site of the present invention may also include:

[0022] 1. When the oil tank of the trolley is full of lubricating oil, filter the oil in the tank, run the gear pump to circulate the lubricating oil in the tank, turn on the electric heater to heat the oil, set a thermal resistor in the tank, when the temperature exceeds the set value, the thermal resistor converts the electrical signal into a control signal, stops the heater operation, and the filter filters the small particles in the oil. The first pressure gauge and the second pressure gauge display the pressure before and after the filter. When there are many impurities on the surface of the filter element, the pressure difference of the pressure gauge gradually increases. Open the sixth ball valve, close the eighth ball valve and the fifth ball valve, and then open the seventh ball valve to discharge the oil in the filter element pipeline when replacing the filter element, and perform oil sampling operation through the second needle valve.

[0023] 2. When the oil in the oil tank of the external device is filtered, the ninth ball valve is connected to the lowest point of the external device, the fourth ball valve is connected to the high point or the oil filling hole of the external device, the tenth ball valve is closed, the ninth ball valve is opened, the gear pump oil suction channel is switched from the oil tank to external suction, the sixth ball valve is closed, the eighth ball valve and the fifth ball valve are opened, the third ball valve is closed, and the fourth ball valve is opened.

[0024] 3. When the external equipment needs to be started, fill the oil tank with lubricating oil to the 2 / 3 liquid level, close the ninth ball valve, open the tenth ball valve, the gear pump inhales the oil channel into the oil tank, close the sixth ball valve, open the eighth ball valve and the fifth ball valve, close the third ball valve, open the fourth ball valve, the fourth ball valve is connected to the external equipment oil supply pipeline, the external equipment oil return pipeline is connected to the second ball valve, start the gear pump to establish a temporary oil supply cycle; check the liquid level change of the magnetic flap level gauge, calculate the lubricating oil consumption, observe the exhaust gas at the outlet of the oil mist separator, if there is a large amount of oil mist in the exhaust gas, check that the first ball valve is in the open state, and replace the oil filter element here; during the circulation operation, observe the flow, color, and emulsification of the lubricating oil through the pipeline sight glass.

[0025] 4. During the maintenance process of external equipment, the ninth ball valve is connected to the oil drain pipe at the low point of the external equipment, the quick connector at the fourth ball valve leads to the waste oil barrel, the tenth ball valve is closed, the ninth ball valve and the sixth ball valve are opened, the eighth ball valve and the fifth ball valve are closed, the third ball valve is closed, the fourth ball valve is opened, and the gear pump is started to extract the lubricating oil of the external equipment and inject it into the waste oil barrel.

[0026] 5. When external equipment is stored for a long time, perform oil sealing operation:

[0027] Close the ninth ball valve, open the tenth ball valve, the gear pump sucks oil into the oil tank, close the sixth ball valve, open the eighth ball valve and the fifth ball valve, close the third ball valve, open the fourth ball valve, the fourth ball valve is connected to the oil supply pipeline of the oil seal equipment, the external equipment return oil pipeline is connected to the second ball valve, start the gear pump to establish a temporary oil supply cycle; when the ambient temperature is low, turn on the electric heater in advance to heat the oil to 40°C.

[0028] The advantages of the present invention are:

[0029] (1) Design a new small-base lubricating oil tank with a three-dimensional structure and a perforated partition inside. The entire oil tank is made of 316L stainless steel, with argon arc welding inside and outside, and the welds are polished and the surface passivated to ensure that the inside of the oil tank is clean and free of impurities. 680L of lubricating oil can be added at a time on a daily basis, accounting for about 90% of the total volume. The suction port adopts an open welding design at the bottom of the oil tank. During use, it can operate at an extremely low liquid level and achieve a single oil supply of about 600L. The bottom frame of the oil tank is welded with universal wheels to achieve flexible movement on the ground. The overall oil tank occupies a small area and is suitable for various compact operation and debugging sites;

[0030] (2) In order to solve the problem of the need to control the temperature of the lubricating oil during use, an explosion-proof electric heater is installed inside the oil tank to perform internal circulation heating according to the ambient temperature, equipment use requirements, and lubricating oil viscosity requirements. To meet the temperature requirements of the lubricating oil under various working conditions, the side wall of the oil tank is equipped with a thermal resistor and an on-site table to achieve precise control of the lubricating oil medium temperature and over-temperature protection. At the same time, the installation of a mechanical structure temperature gauge achieves the functions of comparison, correction, and on-site observation and protection;

[0031] (3) A large-flow static oil mist separator is installed on the top of the oil tank. When the oil tank is in use, especially when the lubricating oil needs to be heated, a large amount of oil mist gas will be generated and gathered on the top of the oil tank. The composite filter element inside the static oil mist separator purifies and gathers the oil and gas particles. The clean air is discharged into the atmosphere through the filter element, and the gathered oil particles are gathered to form oil and injected back into the oil tank. This prevents the escaped oil and gas from causing pollution to the operating area or potential explosion hazards, while reducing the loss of oil;

[0032] (4) An independent power unit is installed outside the oil tank. This trolley uses a positive displacement pump-gear pump to achieve self-priming and delivery of various liquid levels of external lubricating oil.

[0033] (5) The gear pump suction port pipeline is equipped with dual suction channels. The first channel is connected to the oil tank body, and the second channel is a backup channel for external lubricating oil suction. A quick connector is reserved at the interface. During daily use, the channel can be controlled, switched and adjusted through an independent ball valve in each channel;

[0034] (6) For use environments with high requirements for lubricating oil particle size, the gear pump output pipeline is equipped with a high-precision pipeline filter with replaceable filter elements to meet the requirements of different equipment for lubricating oil medium particle size. At the same time, a bypass switch is installed outside the fine filter to achieve the replacement of the internal filter element without stopping the machine, ensuring the continuous operation of the lubricating oil system;

[0035] (7) The external transmission pipeline is equipped with a pipeline window to observe the continuous flow of the circulating lubricating oil. When the water content in the lubricating oil is high, the color change of the oil can be observed during the heating process of the lubricating oil for simple judgment. At the same time, the flow of the oil can also be observed to see whether there is any emulsification of the lubricating oil;

[0036] (8) An independent safety valve is installed in the pump outlet pipeline to avoid damage to valves and instruments caused by overpressure in the outlet pipeline due to improper operation during operation. At the same time, the safety valve discharge pipeline is connected back to the oil tank through a pipeline to form a closed-loop protection;

[0037] (9) The outlet design is also a dual discharge channel, and the spare outlet is still reserved by a quick connector. It can realize the flexible switching of the internal circulation of the lubricating oil trolley or the external delivery of lubricating oil. At the same time, the internal circulation channel can adjust the pressure and flow of the external output;

[0038] (10) The oil tank body is equipped with a magnetic flap level gauge with remote transmission function. The level signal is uploaded to the explosion-proof electrical control box. When the oil tank level is displayed as ultra-high or ultra-low, the alarm display and automatic pump stop protection logic will be triggered. The system will stop the pump and stop heating to protect the safety of the running equipment. When the electric heater is running, the over-temperature automatic power off of the heater can be performed according to the feedback signal of the oil tank thermal resistor. The remote pressure transmitter measures the pressure of the pipeline after the pump. When overpressure is detected, the alarm display and pump stop protection are performed;

[0039] (11) All pumps, heaters and electrical boxes are explosion-proof and can be used in various complex environments;

[0040] (12) During the design and production of the trolley, an independent explosion-proof electrical control box is installed, which is pre-installed with various current, temperature, pressure and other protection components and protection logic to achieve automatic protection during the entire operation of the trolley. During use, it only needs to be connected to an external power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is the schematic diagram of the device of the present invention;

[0042] Figure 2 It is the appearance diagram of the present invention;

[0043] Figure 3 This is the flow chart of internal lubricating oil circulation;

[0044] Figure 4 This is the flow chart of lubricating oil transmission;

[0045] Figure 5 It is a top view of the present invention.

[0046] Reference numerals in the figures:

[0047] The first ball valve 1, oil mist separator 2, the second ball valve 3, the blind plate 4, the manhole door 5, the safety valve 6, the third ball valve 7, the fourth ball valve 8, the pipeline sight glass 9, the pressure transmitter 10, the first pressure gauge 11, the fifth ball valve 12, the sixth ball valve 13, the seventh ball valve 14, the filter 15, the second pressure gauge 16, the eighth ball valve 17, the gear pump 18, the Y-type filter 19, the ninth ball valve 20, the tenth ball valve 21, the thermal resistor 22, the thermometer 23, the second needle valve 24, the electric heater 25, the perforated partition 26, the eleventh ball valve 27, the first needle valve 28, and the magnetic flap liquid level gauge 29. DETAILED DESCRIPTION

[0048] The present invention is described in more detail below with reference to the accompanying drawings:

[0049] Combination Figure 1-5The present invention discloses a multifunctional environmentally friendly lubricating oil trolley, comprising an oil tank, an oil mist separator 2, a magnetic flap level gauge 29, a Y-type filter 19, a gear pump 18, a filter 15, a filter pipe, a pipe sight glass 9, first to eleventh ball valves 1, 3, 7, 8, 12, 13, 14, 17, 20, 21, 27, the oil mist separator 2 is connected to the oil tank through the first ball valve 1, the external equipment oil return pipe is connected to the oil tank through the second ball valve 3, the two ends of the magnetic flap level gauge 29 are connected to the oil tank through the upper connecting ball valve and the lower connecting ball valve respectively, the lower end of the magnetic flap level gauge 29 is also connected to the first needle valve 28, the side of the oil tank is connected to the second needle valve 24, an electric heater 25 is arranged in the oil tank, the top of the oil tank is connected to the upper pipe of the oil tank, the bottom of the oil tank is connected to the lower pipe of the oil tank, the upper pipe of the oil tank is connected to the lower pipe of the oil tank, the upper pipe of the oil tank is installed with the third ball valve 7, and the lower pipe of the oil tank The end of the pipeline is connected to the oil supply pipeline of the external equipment through the fourth ball valve 8. The Y-type filter 19, the gear pump 18, the filter 15, and the pipeline sight glass 9 are installed in sequence on the pipeline below the oil tank from the oil tank to the fourth ball valve 8. The two ends of the filter pipeline are respectively connected to the pipeline below the oil tank before and after the filter 15. The eighth ball valve 17 and the fifth ball valve 12 are respectively installed on the pipeline below the oil tank before and after the filter 15. The sixth ball valve 13 is installed on the filter pipeline. The seventh ball valve 14 is extended between the filter 15 and the fifth ball valve 12. The tenth ball valve 21 is installed on the pipeline below the oil tank between the Y-type filter 19 and the oil tank. The ninth ball valve 20 is extended between the tenth ball valve 21 and the Y-type filter 19. The sewage pipeline is connected below the oil tank, and the eleventh ball valve 27 is installed on the sewage pipeline; the first pressure gauge 11 is installed at the front end of the pipeline sight glass 9, and the second pressure gauge 16 is installed between the filter 15 and the eighth ball valve 17.

[0050] The external lubrication method of the mechanical equipment operation site of the present invention:

[0051] 1. Refill the lubricating oil tank of the trolley

[0052] When the trolley is used for the first time, it is necessary to carefully check the valve switch status, flange connection status, and internal wiring of the distribution box of the trolley body. Open the first ball valve 1 for the oil mist separator to return the oil to the oil tank, open the magnetic flap level gauge connection ball valve, and confirm that the first needle valve 28 is closed for the magnetic flap level gauge to discharge residual liquid and the second needle valve 24 is closed for the oil tank sampling valve. Close the eleventh ball valve 27 for oil tank sewage discharge, and open the ninth ball valve 20 for the pump to suck in external lubricating oil. Check the Y-type filter 19 for filtering large particles in the lubricating oil. If the operating equipment does not require high lubricating oil particle size, only the new oil addition operation is required, open the sixth ball valve 13 and the third ball valve 7, and close the eighth ball valve 17, the fifth ball valve 12, and the fourth ball valve 8. Turn on the main power supply and the gear pump 18 power supply on the distribution box, and perform the operation of extracting lubricating oil from the outside and injecting it into the trolley body tank.

[0053] 2. Trolley lubricating oil filtration

[0054] When the oil tank of the trolley is filled with enough lubricating oil, the oil in the oil tank needs to be filtered. The gear pump is operated to circulate the lubricating oil in the oil tank. When the ambient temperature is low, the electric heater 25 can be turned on to heat the oil to obtain better fluidity. When the temperature heating exceeds the set value, the thermal resistor 22 converts the electrical signal into a control signal to realize the interlocking heater stop operation. The filter 15 is used to filter small particles in the oil to meet the particle size requirements. The second pressure gauge 16 and the first pressure gauge 11 are used to display the pressure before and after the filter. When there are many impurities on the surface of the filter element, the pressure difference of the pressure gauge gradually increases. Open the sixth ball valve 13, close the eighth ball valve 17 and the fifth ball valve 12, and then open the seventh ball valve 14 to discharge the filter element pipeline oil when replacing the filter element. The oil sample sampling operation can be performed through the second needle valve 24.

[0055] 3. External equipment lubricating oil filtration

[0056] When the oil in the tank of an external device needs to be filtered, the supply and return oil pipelines of the trolley and the external device body should be connected first. The quick connector interface at the ninth ball valve 20 is connected to the lowest point of the external device. The quick connector at the fourth ball valve 8 is connected to the high point or oil filling hole of the external device. At the same time, close the tenth ball valve 21 and open the ninth ball valve 20. The oil suction channel of the gear pump 18 is switched from the tank body to external suction. Close the sixth ball valve 13, open the eighth ball valve 17 and the fifth ball valve 12. Close the third ball valve 7 and open the fourth ball valve 8. After the status check before the equipment is activated is confirmed to be correct, the online lubricating oil filtration function can be performed. At the same time, the corresponding precision filter element can be replaced according to the lubricating oil particle size grade requirements.

[0057] 4. Temporary gas station fuel supply

[0058] When the external equipment needs to be started, the multifunctional lubricating oil trolley can temporarily circulate the oil supply to the equipment. However, since the temperature of the lubricating oil will continue to rise during the circulation process, this trolley can only be used as a temporary oil station for oil supply in a short period of time. Fill the oil tank with lubricating oil to the 2 / 3 liquid level. Close the ninth ball valve 20 and open the tenth ball valve 21. The oil suction channel of the gear pump 18 is the oil tank body. Close the sixth ball valve 13, open the eighth ball valve 17 and the fifth ball valve 12. Close the third ball valve 7 and open the fourth ball valve 8. The fourth ball valve 8 quick interface is connected to the external equipment oil supply pipeline, and the external equipment oil return pipeline is connected to the interface at the second ball valve 3. Start the gear pump 18 to establish a temporary oil supply cycle. Check the liquid level change of the magnetic flap level gauge 29 to calculate the lubricating oil consumption. At the same time, observe the exhaust gas at the outlet of the oil mist separator 2. If there is a large amount of oil mist in the exhaust gas, check whether the first ball valve 1 is in the open state and replace the oil filter element here in time. During the circulation operation, the flow, color, emulsification, etc. of the lubricating oil can also be visually observed through the pipeline sight glass 9.

[0059] 5. Forced oil drainage of the equipment being maintained

[0060] Usually, during the maintenance process of external equipment, the lubricating oil needs to be replaced due to the long service life. Generally, the lubricating oil is replaced by gravity draining or forced draining. For equipment with a large amount of lubricating oil, it is suitable to use this trolley to force the oil to be pumped out and directly injected into the temporary waste oil barrel. The quick interface at the ninth ball valve 20 is connected to the low-point oil drainage pipeline of the external equipment, and the quick interface at the fourth ball valve 8 leads to the waste oil barrel. Close the tenth ball valve 21, open the ninth ball valve 20 and the sixth ball valve 13, and close the eighth ball valve 17 and the fifth ball valve 12. Close the third ball valve 7 and open the fourth ball valve 8. At this time, start the gear pump 15 to extract the lubricating oil of the external equipment and inject it into the waste oil barrel. When performing this operation, an air channel must be opened at the top of the external equipment to allow air to enter the oil chamber. Prevent negative pressure in the oil chamber of the equipment.

[0061] 6. Oil seal and unseal of external circulation equipment

[0062] When external equipment is stored for a long time, oil sealing is required to protect the storage safety of the equipment's operating parts. Similarly, oil-sealed equipment needs to be unsealed before it is put into use.

[0063] Oil seals form a protective oil film on the surface of the equipment that is in contact with the lubricating oil, isolating it from air or moisture. Anti-rust oil is usually selected as the oil seal medium. During use, there are certain requirements for the ambient temperature, anti-rust oil temperature, air humidity, etc. When this trolley is selected as an oil seal trolley, follow the sequence number 1 to refill the trolley, and select the amount of anti-rust oil to be added according to the volume and consumption of the oil-sealed equipment body. Close the ninth ball valve 20 and open the tenth ball valve 21. The oil suction channel of the gear pump 18 is the oil tank body. Close the sixth ball valve 13, open the eighth ball valve 17 and the fifth ball valve 12. Close the third ball valve 7 and open the fourth ball valve 8. The fourth ball valve 8 quick interface is connected to the oil supply pipeline of the oil seal equipment, and the external equipment return oil pipeline is connected to the interface at the second ball valve 3. Start the gear pump 18 to establish a temporary oil supply cycle. When the ambient temperature is low, the electric heater 25 needs to be turned on in advance to heat the oil to 40°C to achieve good fluidity and meet the requirements of the large equipment for lubricating oil temperature.

[0064] When the long-term storage equipment is ready for use, the unsealing operation is performed. The eleventh ball valve 27 is used to drain all the liquid in the oil tank. The lubricating oil is replaced with the running lubricating oil grade selected by the equipment. Repeat the same operation of the oil seal to achieve the purpose of unsealing.

Claims

1. A multifunctional environmentally friendly lubricating oil trolley, characterized by: It includes an oil tank, an oil mist separator, a magnetic flap level gauge, a Y-type filter, a gear pump, a filter, a filter pipe, a pipe sight glass, and the first to eleventh ball valves. The oil mist separator is connected to the oil tank through the first ball valve, and the external equipment return oil pipe is connected to the oil tank through the second ball valve. Both ends of the magnetic flap level gauge are connected to the oil tank through the upper connecting ball valve and the lower connecting ball valve respectively. The lower end of the magnetic flap level gauge is also connected to the first needle valve, and the side of the oil tank is connected to the second needle valve. An electric heater is arranged in the oil tank. The top of the oil tank is connected to the pipe above the oil tank, the bottom of the oil tank is connected to the pipe below the oil tank, the pipe above the oil tank is connected to the pipe below the oil tank, the third ball valve is installed on the pipe above the oil tank, and the end of the pipe below the oil tank is connected to the The oil supply pipeline of the external equipment is connected. A Y-type filter, a gear pump, a filter and a pipeline sight glass are installed in sequence on the pipeline below the oil tank from the oil tank to the fourth ball valve. The two ends of the filter pipeline are respectively connected to the pipeline below the oil tank before and after the filter. The eighth ball valve and the fifth ball valve are respectively installed on the pipeline below the oil tank before and after the filter. The sixth ball valve is installed on the filter pipeline. The seventh ball valve is extended between the filter and the fifth ball valve. The tenth ball valve is installed on the pipeline below the oil tank between the Y-type filter and the oil tank. The ninth ball valve is extended between the tenth ball valve and the Y-type filter. The sewage pipeline is connected under the oil tank, and the eleventh ball valve is installed on the sewage pipeline. The first pressure gauge is installed at the front end of the pipeline sight glass, and the second pressure gauge is installed between the filter and the eighth ball valve.

2. The multifunctional environmentally friendly lubricating oil trolley according to claim 1 is characterized by: It also includes a safety valve, which is respectively connected to the oil tank and the pipeline below the oil tank.

3. External lubrication method for mechanical equipment operation site, characterized by: A multifunctional and environmentally friendly lubricating oil trolley as described in claim 1 is used; when the lubricating oil tank is refilled with oil: the first ball valve is opened to allow the oil in the oil mist separator to return to the oil tank, the magnetic flap level gauge connecting ball valve is opened, and the first needle valve used for the magnetic flap level gauge to discharge residual liquid and the second needle valve used for tank sampling are confirmed to be closed; the eleventh ball valve is closed to drain the oil tank, the ninth ball valve is opened to allow the pump to inhale external lubricating oil, the Y-type filter is checked to filter large particles in the lubricating oil, the sixth ball valve and the third ball valve are opened, the eighth ball valve, the fifth ball valve and the fourth ball valve are closed, the gear pump power supply is started, and the lubricating oil is drawn from the outside and injected into the trolley body tank.

4. The external lubrication method for mechanical equipment operation site according to claim 3 is characterized by: When the trolley tank is full of lubricating oil, the oil in the tank is filtered, the gear pump is run to circulate the lubricating oil in the tank, the electric heater is turned on to heat the oil, a thermal resistor is set in the tank, when the temperature exceeds the set value, the thermal resistor converts the electrical signal into a control signal, the heater operation is stopped, the filter filters the small particles in the oil, the first pressure gauge and the second pressure gauge display the pressure before and after the filter, when there are more impurities on the surface of the filter element, the pressure difference of the pressure gauge gradually increases, open the sixth ball valve, close the eighth ball valve and the fifth ball valve, and then open the seventh ball valve to discharge the filter element pipeline oil when replacing the filter element, and perform oil sampling operation through the second needle valve.

5. The external lubrication method for mechanical equipment operation site according to claim 3 is characterized by: When the oil in the oil tank of the external device is filtered, the ninth ball valve is connected to the lowest point of the external device, the fourth ball valve is connected to the high point or the oil filling hole of the external device, the tenth ball valve is closed, the ninth ball valve is opened, the gear pump oil suction channel is switched from the oil tank to external suction, the sixth ball valve is closed, the eighth ball valve and the fifth ball valve are opened, the third ball valve is closed, and the fourth ball valve is opened.

6. The external lubrication method for mechanical equipment operation site according to claim 3 is characterized by: When the external equipment needs to be started, fill the oil tank with lubricating oil to the 2 / 3 liquid level, close the ninth ball valve, open the tenth ball valve, the gear pump inhales the oil channel into the oil tank, close the sixth ball valve, open the eighth ball valve and the fifth ball valve, close the third ball valve, open the fourth ball valve, the fourth ball valve is connected to the external equipment oil supply pipeline, the external equipment oil return pipeline is connected to the second ball valve, start the gear pump to establish a temporary oil supply cycle; check the liquid level change of the magnetic flap level gauge, calculate the lubricating oil consumption, observe the exhaust gas at the outlet of the oil mist separator, if there is a large amount of oil mist in the exhaust gas, check that the first ball valve is in the open state, and replace the oil filter element here; during the circulation operation, observe the flow, color, and emulsification of the lubricating oil through the pipeline sight glass.

7. The external lubrication method for mechanical equipment operation site according to claim 3 is characterized in that: During the equipment maintenance process, the ninth ball valve is connected to the low-point oil drain pipe of the external equipment, the quick connector at the fourth ball valve leads to the waste oil barrel, the tenth ball valve is closed, the ninth ball valve and the sixth ball valve are opened, the eighth ball valve and the fifth ball valve are closed, the third ball valve is closed, the fourth ball valve is opened, and the gear pump is started to extract the lubricating oil of the external equipment and inject it into the waste oil barrel.

8. The external lubrication method for mechanical equipment operation site according to claim 3 is characterized by: When external equipment is stored for a long time, perform oil sealing operation: Close the ninth ball valve, open the tenth ball valve, the gear pump sucks oil into the oil tank, close the sixth ball valve, open the eighth ball valve and the fifth ball valve, close the third ball valve, open the fourth ball valve, the fourth ball valve is connected to the oil supply pipeline of the oil seal equipment, the external equipment return oil pipeline is connected to the second ball valve, start the gear pump to establish a temporary oil supply cycle; when the ambient temperature is low, turn on the electric heater in advance to heat the oil to 40°C.

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