A methanol fuel tank oil gas recovery device for mining machinery

Abstract

This invention relates to a methanol fuel tank vapor recovery device for mining machinery. By setting a trigger switch, the internal pressure of the fuel tank can be monitored in real time. When the pressure reaches a certain threshold, the trigger switch activates a solenoid valve and a blow-suction pump. The vapor recovery tank absorbs the vapor from above the fuel tank until the internal pressure decreases, causing the contact block to move away from the trigger switch, and the solenoid valve inside the steam pipe closes. At this point, a pressure plate compresses an elastic sleeve, causing coolant to extend along the sleeve to the top of the sealing plate for cooling. Then, the solenoid valve and electromagnet inside the steam pipe close, and the blow-suction pump switches to blowing mode, blowing air towards the top of the sealing plate, pushing the sealing plate downwards. Through pressurization, the vapor is converted into liquid oil. The solenoid valve inside the return pipe opens, returning the collected liquid oil back to the fuel tank, thus achieving the effect of converting vapor into liquid for collection and reuse.

Description

Technical Field

[0001] This invention relates to a methanol fuel tank vapor recovery device for mining machinery, and particularly to a methanol fuel tank vapor recovery device for use in mining machinery. Background Technology

[0002] Oil and gas are the products of the volatilization of highly volatile light components in petroleum products. They are classified as toxic and hazardous substances. When released into the atmosphere, oil and gas react with nitrogen oxides under strong sunlight, producing photochemical smog, which seriously endangers human health and ecological safety. Oil and gas recovery devices are required for recovering oil and gas from methanol fuel tanks in mining machinery.

[0003] To address the current issue of oil and gas recovery, some car fuel tanks on the market have adopted a design with vent holes, which has a certain market share and can discharge excess oil and gas. However, this method not only wastes fuel but also causes air pollution.

[0004] Chinese invention patent CN 112278295 A discloses a method that uses a condenser plate added inside the oil tank to condense the oil vapor for the first time. The condensed oil flows along the condenser plate into the oil tank to participate in the oil circulation. The oil vapor enters the oil tank through the exhaust port and enters an oil-gas separator added to the oil tank for a second condensation. The condensed oil flows back into the oil tank along the tank wall to participate in the oil circulation. The remaining oil vapor containing a small amount of oil is discharged outside the machine through a vent pipe. This method effectively reduces the weight and structure of the lubrication system, makes reasonable use of the oil tank's expansion space, and achieves the function of secondary oil recovery in the oil tank through the condenser plate and oil-gas separator, thereby improving the oil recovery efficiency.

[0005] However, the above patent still has problems. The cooling process is too complicated and the structure is too complex. Therefore, there is an urgent need for a methanol fuel tank vapor recovery device for mining machinery. Summary of the Invention

[0006] The technical problem to be solved by the present invention in view of the above-mentioned prior art is the problem of excessive oil vapor in the fuel tank, which needs to be collected in a timely manner to reduce the gas pressure in the fuel tank.

[0007] To address the aforementioned problems, this invention provides a methanol fuel tank vapor recovery device for mining machinery, comprising a fuel tank body, an oil outlet pipe disposed inside the fuel tank body, one end of which is fixedly connected to the outer end of the fuel tank body and connected to an oil pump, a replenishment pipe fixedly connected to the outer end of the fuel tank body, a vapor recovery tank disposed on the top of the fuel tank body, a steam pipe and a return pipe fixedly connected between the vapor recovery tank and the fuel tank body, a heat sink and a condenser being sequentially disposed outside the steam pipe, a cooling water tank being fixedly connected to the outside of the return pipe, a blow-suction dual-purpose pump fixedly connected to the outside of the vapor recovery tank, a first air pipe and a second air pipe fixedly connected to the two ends of the blow-suction dual-purpose pump respectively, one end of the first air pipe being fixedly connected to the interior of the vapor recovery tank, and the inner wall of the vapor recovery tank being slidably connected. The system has a sealing plate, a movable plate that slides along the inner wall of the tank body, a contact block that is fixedly connected to the top of the movable plate, a trigger switch that is fixedly connected to the top of the tank body, and a compression spring located outside the contact block that is fixedly connected between the trigger switch and the top of the movable plate. The outer side of the oil outlet pipe is slidably connected to the inner wall of the movable plate. During actual operation, a large amount of oil and gas is gradually generated inside the tank body. The air pressure pushes the movable plate upward, pushing the contact block to squeeze the trigger switch, which forces the solenoid valve and the blow-suction pump inside the steam pipe to be opened. The blow-suction pump is in the suction state and begins to draw air towards the air above the sealing plate, so that the sealing plate uses air pressure to absorb the oil and gas above the tank body. After a period of time, the sealing plate reaches its highest point, the contact block leaves the trigger switch, and the solenoid valve inside the steam pipe closes. The solenoid valve inside the steam pipe is closed, the blow-suction pump switches to blowing mode and begins to blow air towards the top of the sealing plate, pushing the sealing plate down. Through pressurization, the oil and gas are converted into liquid oil. The solenoid valve inside the return pipe is opened, and the collected liquid oil is returned to the oil tank body.

[0008] In the methanol fuel tank vapor recovery device for mining machinery, by setting up a blow-suction pump, the vapor can be collected and compressed into a liquid state, thereby effectively avoiding direct emission of vapor and pollution of the environment, and enabling the secondary use of excess vapor.

[0009] As a further improvement of this application, the blow-suction pump is electrically connected to the trigger switch, and a collar is fixedly connected to the bottom of the steam pipe, the outer diameter of which is larger than that of the steam pipe.

[0010] As a further improvement to this application, the steam pipe and the return pipe are internally fixedly connected with solenoid valves, and the solenoid valves and the blow-suction pump are both electrically connected to a controller.

[0011] As a further improvement of this application, an elastic rope is fixedly connected between the bottom of the sealing plate and the inner bottom surface of the oil and gas recovery box. Multiple electromagnets are fixedly connected to the inner top of the oil and gas recovery box. Multiple iron plates corresponding to the electromagnets are embedded in the top of the sealing plate. When the sealing plate rises to the highest point, it touches the trigger switch, turns on the electromagnet, and attracts the sealing plate by the iron plates. At this time, the solenoid valve inside the steam pipe can be closed by the controller. After a period of time, the electromagnet can be closed by the controller.

[0012] A touch switch is fixedly connected to the top of the oil and gas recovery box, and the touch switch is electrically connected to the electromagnet.

[0013] As another improvement of this application, a cooling box is fixedly connected to the top of the oil and gas recovery box, a pressure plate is slidably connected to the inner wall of the cooling box, an elastic sleeve is provided on the top of the pressure plate, the elastic sleeve is filled with coolant, an outlet pipe is fixedly connected between the inner wall of the cooling box near the bottom and the inner wall of the oil and gas recovery box near the top, a top rod is fixedly connected to the top of the sealing plate, and the top of the top rod is fixedly connected to the bottom of the pressure plate.

[0014] As a further improvement to this application, the top of the outlet pipe is slidably connected to the inner wall of the pressure plate. The top of the outlet pipe is close to the inner top surface of the cooling box. By setting up the cooling box, when the sealing plate rises, the pressure plate is raised by the push rod. The pressure plate gradually squeezes the elastic sleeve, which is gradually squeezed and extends from the outlet pipe to the oil and gas recovery box. A thin layer of elastic sleeve filled with coolant is formed between the oil and gas recovery box and the sealing plate. This can cool the oil and gas below the sealing plate in time, avoiding safety hazards when the oil and gas are pressurized later.

[0015] As another improvement of this application, the outlet pipe has a telescopic structure, and the top of the outlet pipe is fixedly connected to the inner wall of the pressure plate.

[0016] As another improvement of this application, the inner wall of the cooling box is provided with an annular through groove, the inner side of the cooling box is provided with a pair of liquid outlet holes connected to the annular through groove, and the inner wall of the oil and gas recovery box is provided with a cooling cavity.

[0017] As a further improvement to this application, the cooling chamber and the annular through groove are interconnected by liquid outlet pipes, and there are multiple liquid outlet pipes.

[0018] In summary, by setting a trigger switch, the internal air pressure of the fuel tank can be monitored in real time. When the air pressure reaches a certain threshold, the trigger switch can be used to open the solenoid valve and the blow-suction pump inside the steam pipe. The blow-suction pump is in suction mode, absorbing the oil and gas above the fuel tank through the air pressure of the oil and gas recovery tank until the internal air pressure of the fuel tank decreases and the contact block leaves the trigger switch, and the solenoid valve inside the steam pipe closes. At this time, the pressure plate squeezes the elastic sleeve, causing the coolant to extend above the sealing plate along with the elastic sleeve, cooling it. Then, the solenoid valve and electromagnet inside the steam pipe close, and the blow-suction pump switches to blowing mode, starting to blow air towards the sealing plate, pushing the sealing plate down. Through pressurization, the oil and gas are converted into liquid oil. The solenoid valve inside the return pipe opens, returning the collected liquid oil back to the fuel tank, thus achieving the effect of converting oil and gas into liquid for collection and reuse. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the first embodiment of this application;

[0020] Figure 2 This is a top view of the overall structure of the first embodiment of this application;

[0021] Figure 3 This is a top view of the overall structure of the first embodiment of this application;

[0022] Figure 4 This is an overall internal plan view of the first embodiment of this application;

[0023] Figure 5 This is the first embodiment of the present application. Figure 4 Enlarged structural diagram at point A;

[0024] Figure 6 This is a structural diagram of the oil and gas recovery tank according to the second embodiment of this application;

[0025] Figure 7 This is a structural diagram of the cooling box and oil / gas recovery box according to the third embodiment of this application;

[0026] Figure 8 This is a schematic diagram showing the internal changes of the cooling box and oil and gas recovery box in the third embodiment of this application;

[0027] Figure 9 This is the internal structure of the cooling box and oil and gas recovery box according to the fifth embodiment of this application;

[0028] Figure 10 This is a flowchart illustrating the fifth embodiment of this application.

[0029] Explanation of the labels in the diagram:

[0030] 1. Oil tank body; 2. Oil outlet pipe; 3. Oil replenishment pipe; 4. Oil vapor recovery box; 5. Steam pipe; 6. Return pipe; 7. Sealing plate; 8. Blowing and suction pump; 9. First air pipe; 10. Second air pipe; 11. Movable plate; 12. Trigger switch; 13. Compression spring; 14. Contact block; 15. Elastic rope; 16. Electromagnet; 17. Touch switch; 18. Cooling tank; 19. Pressure plate; 20. Elastic sleeve; 21. Push rod; 22. Liquid outlet pipe; 23. Liquid outlet hole; 24. Annular through groove; 25. Cooling chamber; 26. Heat sink; 27. Condenser; 28. Cooling water tank. Detailed Implementation

[0031] The five embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0032] First implementation method:

[0033] Figure 1-5 The diagram shows a methanol fuel tank vapor recovery device for mining machinery, comprising a fuel tank body 1, an oil outlet pipe 2 disposed inside the fuel tank body 1, one end of the oil outlet pipe 2 being fixedly connected to the outer end of the fuel tank body 1 and connected to an oil pump, and a replenishment pipe 3 being fixedly connected to the outer end of the fuel tank body 1. The device is characterized in that: a vapor recovery tank 4 is disposed on the top of the fuel tank body 1, a steam pipe 5 and a return pipe 6 are fixedly connected between the vapor recovery tank 4 and the fuel tank body 1, a heat sink 26 and a condenser 27 are sequentially disposed outside the steam pipe 5, a cooling water tank 28 is fixedly connected to the outside of the return pipe 6, and the vapor recovery tank 4 is fixedly connected to the outside of the tank body 1. A blow-suction dual-purpose pump 8 is connected. A first air pipe 9 and a second air pipe 10 are fixedly connected to both ends of the blow-suction dual-purpose pump 8, respectively. One end of the first air pipe 9 is fixedly inserted into the interior of the oil and gas recovery box 4. A sealing plate 7 is slidably connected to the inner wall of the oil and gas recovery box 4. A movable plate 11 is slidably connected to the inner wall of the oil tank body 1. A touch block 14 is fixedly connected to the top of the movable plate 11. A trigger switch 12 is fixedly connected to the inner top of the oil tank body 1. A compression spring 13 located outside the touch block 14 is fixedly connected between the trigger switch 12 and the top of the movable plate 11. The outer side of the oil outlet pipe 2 is slidably connected to the inner wall of the movable plate 11.

[0034] like Figure 1 In actual operation, the water inside the coolant reservoir 28 is generated by the water cooler in the evaporator of the cab air conditioning unit, which can help the liquid methanol to condense again.

[0035] The blow-suction pump 8 has two settings: one for suction and the other for blowing.

[0036] The blow-suction pump 8 is electrically connected to the trigger switch 12. A collar is fixedly connected to the bottom of the steam pipe 5, and the outer diameter of the collar is larger than that of the steam pipe 5.

[0037] Solenoid valves are fixedly connected inside the steam pipe 5 and the return pipe 6. The solenoid valves and the blow-suction pump 8 are both electrically connected to a controller.

[0038] Because the fuel inside the methanol fuel tank is volatile, and in hot environments, it will gradually change from a liquid state to a mist or gas state, causing the air pressure inside the sealed fuel tank body 1 to gradually increase. If the excess fuel gas is not discharged in time, it will cause danger.

[0039] By setting up the oil and gas recovery box 4, excess oil and gas can be collected. In actual operation, a large amount of oil and gas is gradually generated inside the oil tank body 1. The air pressure pushes the movable plate 11 to rise, overcoming the elastic force of the compression spring 13, and finally pushing the touch block 14 to squeeze the trigger switch 12 to start the "air intake" process.

[0040] The process is as follows: Simultaneously open the solenoid valve inside the steam pipe 5 and the blow-suction pump 8. At this time, the blow-suction pump 8 is in the suction state and begins to draw air above the sealing plate 7, thereby gradually pulling the sealing plate 7 up by the negative pressure. This allows the sealing plate 7 to gradually absorb the oil vapor above the oil tank body 1 through the steam pipe 5 using air pressure. During the intake process, the oil vapor enters the condenser 27 through the steam pipe 5. The condenser 27 is connected to the vehicle's air conditioning cooling system for heat exchange, thereby cooling the methanol vapor. After a period of time, the sealing plate 7 reaches its highest point, the touch block 14 leaves the trigger switch 12, the solenoid valve inside the steam pipe 5 closes, and the "suction" process ends.

[0041] The solenoid valve inside the steam pipe 5 closes, and the blow-suction pump 8 switches to blow mode, initiating the "compression" process. Gas is then pumped upwards towards the sealing plate 7, pushing it downwards. This pressurization process helps convert the oil and gas into liquid oil. After a period of settling, the cooled methanol liquid flows back into the pipeline containing the coolant reservoir 28. The water in the coolant reservoir 28 is the air conditioning coolant generated during the vehicle's evaporator operation. This coolant is used for secondary condensation to cool the methanol. After settling in the coolant reservoir 28, the methanol flows into the fuel tank 1 through the opening of the solenoid valve inside the return pipe 6, returning the collected liquid oil to the fuel tank 1.

[0042] Second implementation method:

[0043] Figure 6 As shown, the difference between the second embodiment and the first embodiment is that the following technical features are added: an elastic rope 15 is fixedly connected between the bottom of the sealing plate 7 and the inner bottom surface of the oil and gas recovery box 4; a plurality of electromagnets 16 are fixedly connected to the inner top of the oil and gas recovery box 4; and a plurality of iron plates corresponding one-to-one with the electromagnets 16 are embedded in the top of the sealing plate 7.

[0044] A touch switch 17 is fixedly connected to the top of the oil and gas recovery box 4, and the touch switch 17 is electrically connected to the electromagnet 16.

[0045] To further precisely control the working time of the blow-suction pump 8, a touch switch 17 can be installed. When the sealing plate 7 rises to its highest point, it touches the touch switch 17, which activates the electromagnet 16. The electromagnet then holds the sealing plate 7 in place by adsorbing the iron sheet. At this time, the solenoid valve inside the steam pipe 5 can be closed by the controller. After a period of time (by setting a delay mechanism), the electromagnet 16 can be closed by the controller, and the blow-suction pump 8 can be turned on. The subsequent process is the same as in the first embodiment.

[0046] A touch switch 17 can also be installed on the inner bottom surface of the oil and gas recovery box 4 to help open the solenoid valve inside the return pipe 6.

[0047] The third implementation method:

[0048] Figure 7-8 As shown, the difference between the third embodiment and the second embodiment is that the following technical features are added: a cooling box 18 is fixedly connected to the top of the oil and gas recovery box 4, a pressure plate 19 is slidably connected to the inner wall of the cooling box 18, an elastic sleeve 20 is provided on the top of the pressure plate 19, the elastic sleeve 20 is filled with coolant, an outlet pipe 22 is fixedly connected between the inner wall of the cooling box 18 near the bottom and the inner wall of the oil and gas recovery box 4 near the top, a top rod 21 is fixedly connected to the top of the sealing plate 7, the top of the top rod 21 is fixedly connected to the bottom of the pressure plate 19, the top of the outlet pipe 22 is slidably connected to the inner wall of the pressure plate 19, and the top of the outlet pipe 22 is close to the inner top surface of the cooling box 18.

[0049] The bottom portion of the elastic sleeve 20 is glued to the top of the pressure plate 19.

[0050] By setting up a cooling box 18, when the sealing plate 7 rises, the top rod 21 carries the pressure plate 19 to rise. The pressure plate 19 gradually squeezes the elastic sleeve 20. The elastic sleeve 20 is gradually squeezed and extends from the liquid outlet pipe 22 to the oil and gas recovery box 4, forming a "film" between the oil and gas recovery box 4 and the sealing plate 7. The film is filled with coolant, which can cool the oil and gas below the sealing plate 7 in time through the sealing plate 7, avoiding safety hazards when the oil and gas are pressurized later.

[0051] After a period of time (the delay switch is in effect at this time, allowing the coolant enough time to contact the sealing plate 7 and cool the oil and gas below it), the electromagnet 16 is turned off. Under the action of the elastic rope 15, the sealing plate 7 moves down a short distance, and the elastic sleeve 20 is retracted into the outlet pipe 22. Then the blow-suction pump 8 is turned on to repeat the working process of the first embodiment.

[0052] Fourth implementation method:

[0053] The difference between the fourth and third implementation methods is that the liquid outlet pipe 22 has a telescopic pipe structure, and the top of the liquid outlet pipe 22 is fixedly connected to the inner wall of the pressure plate 19.

[0054] By setting the outlet pipe 22 as a telescopic mechanism, the risk of the outlet pipe 22 repeatedly sliding on the inner wall of the pressure plate 19 and squeezing the elastic sleeve 20 can be avoided, and the telescopic mechanism is more convenient to use.

[0055] Fifth implementation method:

[0056] Figure 9-10 As shown, the difference between the fifth and fourth embodiments is that the following technical features are added: the inner wall of the cooling box 18 is provided with an annular groove 24, the inner side of the cooling box 18 is provided with a pair of liquid outlet holes 23 that communicate with the annular groove 24, and the inner wall of the oil and gas recovery box 4 is provided with a cooling cavity 25.

[0057] The cooling chamber 25 and the annular through groove 24 are interconnected by liquid outlet pipes 22, and there are multiple liquid outlet pipes 22.

[0058] In order to increase the cooling efficiency of the oil and gas inside the oil and gas recovery box 4, coolant can be sent to the cooling chamber 25 opened in the oil and gas recovery box 4. After the pressure plate 19 reaches the highest point, the elastic sleeve 20 is squeezed out of the liquid outlet hole 23. The elastic sleeve 20 extends further into the annular through groove 24 and finally enters the cooling chamber 25 under the action of gravity, thus cooling the inside of the oil and gas recovery box 4.

[0059] The cooling chamber 25 has ventilation holes on its outer side to ensure that the internal air pressure is the same as the external atmospheric pressure.

[0060] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A methanol fuel tank oil gas recovery device for mining machinery, comprising a tank body (1), the inside of the tank body (1) is provided with an oil outlet pipe (2), one end of the oil outlet pipe (2) is fixedly penetrated to the outer end of the tank body (1), and an oil pump is connected, and the outer end of the tank body (1) is fixedly connected with a oil supplement pipe (3), characterized in that: The top of the oil tank body (1) is provided with an oil vapor recovery tank (4), the oil vapor recovery tank (4) and the oil tank body (1) are fixedly connected with a vapor pipe (5) and a reflux pipe (6), the outside of the vapor pipe (5) is sequentially provided with a cooling fin (26) and a condenser (27), the outside of the reflux pipe (6) is fixedly connected with a cooling water kettle (28), the outside of the oil vapor recovery tank (4) is fixedly connected with a blow-suction dual-purpose pump (8), the two ends of the blow-suction dual-purpose pump (8) are respectively fixedly connected with a first air pipe (9) and a second air pipe (10), one end of the first air pipe (9) is fixedly penetrated into the inside of the oil vapor recovery tank (4), the inner wall of the oil vapor recovery tank (4) is slidably connected with a sealing plate (7), the inner wall of the oil tank body (1) is slidably connected with a movable plate (11), the top of the movable plate (11) is fixedly connected with a touch block (14), the inner top of the oil tank body (1) is fixedly connected with a trigger switch (12), the trigger switch (12) and the top of the movable plate (11) are fixedly connected with a compression spring (13) located outside the touch block (14), the outside of the oil outlet pipe (2) is slidably connected to the inner wall of the movable plate (11). The inside of the vapor pipe (5) and the reflux pipe (6) is fixedly connected with a solenoid valve, the solenoid valve and the blow-suction dual-purpose pump (8) are electrically connected with a controller.

2. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 1, characterized in that: The blow-suction dual-purpose pump (8) and the trigger switch (12) are electrically connected, the bottom of the vapor pipe (5) is fixedly connected with a sleeve ring, the outer diameter of the sleeve ring is larger than that of the vapor pipe (5).

3. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 1, wherein: The bottom of the sealing plate (7) and the inner bottom surface of the oil vapor recovery tank (4) are fixedly connected with an elastic rope (15), the inner top of the oil vapor recovery tank (4) is fixedly connected with a plurality of electromagnets (16), the top of the sealing plate (7) is embeddedly connected with a plurality of iron sheets corresponding to the electromagnets (16) one by one.

4. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 3, characterized in that: The top of the oil vapor recovery tank (4) is fixedly connected with a touch switch (17), the touch switch (17) and the electromagnets (16) are electrically connected.

5. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 4, characterized in that: The top of the oil vapor recovery tank (4) is fixedly connected with a cooling tank (18), the inner wall of the cooling tank (18) is slidably connected with a pressing plate (19), the top of the pressing plate (19) is provided with an elastic sleeve (20), the inside of the elastic sleeve (20) is filled with a cooling liquid, the inner wall of the cooling tank (18) close to the bottom is fixedly connected with a liquid outlet pipe (22) between the inner wall of the oil vapor recovery tank (4) close to the top, the top of the liquid outlet pipe (22) is slidably connected with the inner wall of the pressing plate (19), the top of the liquid outlet pipe (22) is close to the inner top surface of the cooling tank (18).

6. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 5, characterized in that: The top of the liquid outlet pipe (22) is slidably connected with the inner wall of the pressing plate (19), the top of the liquid outlet pipe (22) is close to the inner top surface of the cooling tank (18).

7. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 5, wherein: The liquid outlet pipe (22) is in a telescopic pipe structure, the top of the liquid outlet pipe (22) is fixedly connected with the inner wall of the pressing plate (19).

8. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 5, characterized in that: The inner wall of the cooling box (18) is provided with an annular through groove (24), and the inner side of the cooling box (18) is provided with a pair of liquid outlet holes (23) communicated with the annular through groove (24), and the inner wall of the oil gas recovery box (4) is provided with a cooling cavity (25).

9. A methanol fuel tank vapor recovery system for a mining machine as set forth in claim 8, characterized in that: The cooling cavity (25) and the annular through groove (24) are communicated with each other through a plurality of liquid outlet pipes (22).

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