Non-electric power drive oil supply system

Abstract

The invention discloses an oil supply system without electric power drive, which relates to the technical field of oil supply and comprises an oil tank, a vacuum tank, a negative pressure generation unit, an oil outlet pipeline, an oil inlet pipeline, an exhaust pipeline, a circulating negative pressure pipeline and a circulating exhaust pipeline, the exhaust pipeline is connected with the circulating negative pressure pipeline in a manner of being capable of controlling opening and closing; a constant displacement oil pumping unit driven by an air cylinder is mounted on an oil outlet pipeline, so that the accuracy of fuel oil conveying is ensured; the vacuum tank is connected with the oil tank and the circulating negative pressure pipeline in a manner of being capable of controlling opening and closing; the vacuum tank and the negative pressure generating unit are connected through a circulating exhaust pipeline, the negative pressure generating unit is driven by an air cylinder, so that the vacuum tank is kept in a negative pressure state, fuel oil in the oil inlet pipeline is promoted to be sucked into the oil tank, and meanwhile volatile gas of the fuel oil is exhausted through the circulating exhaust pipeline; pressure in the oil tank can be dynamically adjusted through linkage control of the exhaust pipeline and the circulating negative pressure pipeline, and rapid oil supply is achieved in cooperation with the quantitative oil pumping unit. And high-efficiency and power-free oil supply operation is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel supply, and particularly relates to a fuel supply system without electric power drive. Background Art

[0002] During the automobile production process, new cars need to be test-driven before leaving the factory to release the stress between components and ensure the stability of the overall vehicle performance. Therefore, before test-driving, fuel vehicles must fill fuel into the fuel tank through a fuel supply device to enable the engine to start normally. However, traditional fuel supply devices mainly adopt electric fuel supply methods, that is, fuel is transported to the fuel tank of a new car through an electric pump. Although this fuel supply method is relatively efficient in ordinary environments (such as gas stations with open areas), there are certain safety hazards when used in the enclosed scenario of an automobile production factory.

[0003] Automobile production factories usually contain a large number of mechanical devices, and the site is relatively enclosed with poor air circulation. In addition, flammable materials such as paint, lubricating oil, and plastic products may be stored in the factory, and gasoline itself is a flammable and explosive substance, which is extremely likely to cause safety accidents due to electric sparks or high-temperature environments. If the fuel supply device relies on electric drive, once an electrical fault occurs, such as wire short circuit, static electricity accumulation, or motor overheating, it may ignite gasoline vapor, resulting in fires or even explosion accidents.

[0004] Therefore, in order to reduce safety risks, the fuel supply equipment inside the factory needs to minimize the use of electric drive as much as possible to avoid safety accidents caused by electrical faults.

[0005] In addition, the high volatility of gasoline will cause pressure accumulation in the fuel tank. If there is no effective exhaust mechanism, it may cause container rupture or steam leakage, further increasing the explosion risk.

[0006] Currently, the commonly used electric fuel supply system in the industry drives the oil pipeline through an electric pump, and the controller controls the opening and closing of the electric pump and the valve. Although it can achieve precise fuel supply, its electrical components have significant safety hazards in a flammable environment.

[0007] Some non-electric fuel supply solutions attempt to replace electricity with mechanical or hydraulic drive, but such systems have complex structures and require additional configuration of mobile fuel power units, resulting in reduced operation flexibility and increased costs. In addition, the existing technology mostly relies on simple pressure relief valves or passive exhaust for handling the vapor pressure of gasoline, lacking an active regulation mechanism and making it difficult to balance safety and fuel filling efficiency.

[0008] In summary, it is found that the existing technology has at least the following technical problems:

[0009] Electrical safety hazards: The electric oil supply device relies on electric drive and is prone to causing fires due to electric sparks or malfunctions in flammable and explosive environments; Insufficient volatile pressure control: The existing exhaust mechanism responds passively to pressure changes and lacks dynamic adjustment ability, which is prone to causing pressure imbalance or fuel waste; System complexity and high cost: Non-electric alternative solutions (such as hydraulic drive) require additional power units, with bulky structures and high maintenance costs.

[0010] The existing oil supply device has technical problems such as being prone to electrical fire, insufficient control of oil and gas volatile pressure, and complex oil supply system. Summary of the Invention

[0011] The purpose of the present invention is to provide an oil supply system without electric power drive to solve the technical problems of the existing oil supply device being prone to electrical fire, insufficient control of oil and gas volatile pressure, and complex oil supply system.

[0012] The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

[0013] To solve the above technical problems, the present invention provides the following technical solutions:

[0014] The present invention provides an oil supply system without electric power drive, including an oil tank. An oil outlet pipeline is installed at the bottom of the oil tank, and an oil inlet pipeline, an exhaust pipeline, and a circulating negative pressure pipeline are provided at the top. The exhaust pipeline and the circulating negative pressure pipeline are connected in a controllable opening and closing manner; and a vacuum tank, which is connected to the top of the oil tank and the circulating negative pressure pipeline in a controllable opening and closing manner; and a circulating air extraction pipeline, which is provided with an air extraction end, an exhaust end, and two negative pressure ends. The air extraction end is connected to the vacuum tank, and the exhaust end is connected to an oil-water separator; and a negative pressure generating unit driven by a cylinder, which is connected to the two negative pressure ends. A plurality of pneumatically controlled switches are provided on the circulating air extraction pipeline, and the connection pipelines between the negative pressure generating unit and the oil-water separator and the vacuum tank are cyclically switched through the two negative pressure ends, so that the negative pressure generating unit sucks and discharges gas from the vacuum tank to the exhaust end in both suction and discharge processes; driven by air pressure, during oil storage, the vacuum tank is maintained at a negative pressure through the negative pressure generating unit, so that the oil in the oil inlet pipeline is sucked into the oil tank; during oil discharge, the exhaust pipeline is communicated with the oil tank, so that the oil in the oil tank is discharged from the oil outlet pipeline; and a quantitative oil pumping unit driven by a cylinder is provided on the oil outlet pipeline.

[0015] In one embodiment, a liquid level measurement port is provided at the top of the oil tank, and an explosion-proof liquid level gauge is installed at the liquid level measurement port.

[0016] In one embodiment, both ends of the oil outlet pipeline are respectively connected to the bottom of the oil tank and the oil gun to be used or the end oil supply pipeline; on the oil outlet pipeline, in the direction of oil discharge, a manual ball valve, a filter, a first oil and gas discharge pneumatic ball valve, the metering pump oil unit, and a second oil and gas discharge pneumatic ball valve are arranged in sequence; the manual ball valve is arranged adjacent to the oil tank, and the second oil and gas discharge pneumatic ball valve is arranged adjacent to the oil gun to be used or the end oil supply pipeline.

[0017] In one embodiment, the metering pump oil unit includes an oil suction cylinder and a pump oil driving cylinder; the oil suction inlet end of the oil suction cylinder is connected to the oil outlet pipeline through a pipe tee; the pump oil driving cylinder is installed on the oil suction outlet end of the oil suction cylinder, and the telescopic rod of the pump oil driving cylinder extends into the oil suction cylinder from the oil suction outlet end and is connected to the piston of the oil suction cylinder.

[0018] In one embodiment, both ends of the oil inlet pipeline are respectively connected to the top of the oil tank and an external oil depot to be connected; an oil and gas inlet pneumatic ball valve is installed on the oil inlet pipeline.

[0019] In one embodiment, the circulating negative pressure pipeline includes a tank connection branch and a circulating branch; the tank connection branch connects the oil tank and the vacuum tank, and a shunt tee is installed between the vacuum tank and the oil tank; the shunt tee is connected to one end of the circulating branch, and the other end of the circulating branch is connected to the vacuum tank; on the tank connection branch, a pneumatically controlled first circulating ball valve is arranged between the shunt tee and the vacuum tank; on the circulating branch, a pneumatically controlled second circulating ball valve and a third circulating ball valve are arranged, the second circulating ball valve is arranged adjacent to the shunt tee, and the third circulating ball valve is arranged adjacent to the vacuum tank; in the circulating branch, the pipeline connecting the second circulating ball valve and the third circulating ball valve is a circulating measurement pipe, one end of the circulating measurement pipe is connected to the second circulating ball valve, the third circulating ball valve is connected to the pipe wall interface of the circulating measurement pipe, and an explosion-proof barometer is installed at the other end of the circulating measurement pipe.

[0020] In one embodiment, an exhaust tee is arranged on the circulating branch, the exhaust tee connects the second circulating ball valve, the circulating measurement pipe and the exhaust pipeline; a pneumatically controlled exhaust ball valve is installed on the exhaust pipeline.

[0021] In one embodiment, the exhaust ball valve is a three-way ball valve; the three-way ball valve is further connected to a pressurizing unit; the three-way ball valve can control the opening and closing of the exhaust pipe and the exhaust three-way, and the opening and closing of the exhaust three-way and the pressurizing unit; when the exhaust pipe is connected to the oil tank and rapid oil discharge is required, the three-way ball valve controls the connection between the exhaust three-way and the pressurizing unit, and pressurizes the oil tank through the pressurizing unit, so that the oil in the oil tank is quickly discharged from the oil outlet pipe.

[0022] In one embodiment, the circulating air extraction pipeline includes an air extraction control branch, an auxiliary branch, and a first three-way connector. The air extraction control branch and the auxiliary branch are connected end to end and communicate with each other. The ends of the air extraction control branch and the auxiliary branch in the vertical direction are connected through the first three-way connector and are connected to the oil-water separator. On the air extraction control branch, a second three-way connector, a third three-way connector, and a fourth three-way connector are sequentially installed from bottom to top in the vertical direction; one end of the second three-way connector and the fourth three-way connector is respectively the negative pressure end and is connected to the negative pressure generating unit; one end of the third three-way connector is the air extraction end and is connected to the vacuum tank. On the air extraction control branch, a first control ball valve, a second control ball valve, a third control ball valve, and a fourth control ball valve are sequentially installed from bottom to top in the vertical direction; the first control ball valve is arranged between the first three-way connector and the second three-way connector; the second control ball valve is arranged between the second three-way connector and the third three-way connector; the third control ball valve is arranged between the third three-way connector and the fourth three-way connector; the fourth control ball valve is arranged between the fourth three-way connector and the connection elbow connecting the auxiliary branch.

[0023] In one embodiment, the negative pressure generating unit includes an air suction cylinder and an air suction driving cylinder; the first air suction side of the air suction cylinder is connected to the air extraction control branch through the second three-way connector; the second air suction side of the air suction cylinder is connected to the air extraction control branch through the fourth three-way connector; the air suction driving cylinder is installed below the air suction cylinder, and the telescopic rod of the air suction driving cylinder extends into the air suction cylinder and is connected to the piston of the air suction cylinder.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention provides a non-electrically powered oil supply system, which adopts a pneumatic driving method, avoiding the risk of fire or explosion caused by electrical faults in traditional electric oil supply devices, and greatly improving safety; the entire oil supply system does not require motors, electronic control units, and related electrical components, and is more reliable when used in flammable and explosive environments such as automobile production factories.

[0026] Through the cooperation of the negative pressure generating unit and the vacuum tank, when the oil tank stores oil, a negative pressure is always maintained in the oil tank, so as to efficiently suck the fuel from the fuel inlet pipeline into the oil tank, realizing efficient and rapid fuel transportation.

[0027] In addition, the system uses the circulating suction pipeline, the negative pressure generating unit and the oil-water separator to work together to maintain the negative pressure in the vacuum tank and the oil tank, and effectively discharge the gas generated by the evaporation of the fuel in the oil tank in the vacuum tank, reducing the pressure in the vacuum tank and the oil tank, and avoiding potential safety hazards caused by excessive pressure due to fuel evaporation; at the same time, the circulating suction pipeline, the vacuum tank and the oil tank can accelerate the suction of fuel when filling fuel, and maintain negative pressure and discharge the gas generated by fuel evaporation when storing fuel, constituting a synergistic effect of efficient fuel transportation and safe fuel storage.

[0028] Meanwhile, the system uses the exhaust pipeline and the oil tank. When discharging oil, the exhaust pipeline is connected to the oil tank, and the connection between the oil tank and the vacuum tank is closed, so that the oil tank returns to positive pressure, and thus the oil in the oil tank flows by gravity and is discharged from the oil outlet pipeline.

[0029] In addition, the fuel supply flow can be controlled by the metering fuel pumping unit driven by a cylinder, making the fuel supply process more accurate and reducing fuel waste. The metering fuel pumping unit can also use the power driven by the cylinder to provide additional suction for discharging the fuel from the oil tank and provide pressurizing pressure for discharging the fuel from the metering fuel pumping unit, accelerating the fuel discharge and supply, thereby improving the filling efficiency.

[0030] Compared with the traditional electric fuel supply device, the pneumatic fuel supply structure of the non-electric power-driven fuel supply system of the present invention is reasonably designed, easy to operate, does not require a complex electric control system, reduces the equipment maintenance cost, and improves the stability and service life of the system at the same time. Through the controllable opening and closing pipeline design, the system realizes the efficient collaborative work of multiple components such as the oil tank, the fuel inlet pipeline, the exhaust pipeline, the circulating negative pressure pipeline, the metering fuel pumping unit, the circulating suction pipeline, the negative pressure generating unit, the vacuum tank and the oil-water separator, making the fuel supply process smoother, and is applicable to fuel supply scenarios that require high safety and high stability such as automobile production plants and enclosed sites.

[0031] In summary, the non-electric power-driven fuel supply system of the present invention has the following features:

[0032] (1) High safety: Through the circulating negative pressure pipeline, the metering pump oil unit, the circulating suction pipeline, the negative pressure generating unit and the vacuum tank, fuel is transported by air pressure in a way of one suction, one pressure and one pumping, avoiding the risk of fire or explosion caused by electrical faults, and being applicable to flammable and explosive environments;

[0033] (2) High fuel supply efficiency: By maintaining the fuel suction process through the negative pressure of the vacuum tank and combining with the metering pump oil unit, precise fuel supply is achieved, improving the filling efficiency;

[0034] (3) Effective control of volatile gases: The exhaust pipeline, the circulating negative pressure pipeline, the circulating suction pipeline and the oil-water separator cooperate with each other to release the gases volatilized from the fuel in the oil tank in a timely manner during oil storage and fuel supply respectively, reducing potential safety hazards;

[0035] (4) Simple structure and low maintenance cost: Without a motor and an electric control system, the equipment maintenance cost is reduced, and the reliability and service life of the fuel supply system are improved;

[0036] (5) Strong applicability: It can be widely applied to special scenarios such as automobile production plants and enclosed scenarios that require power-free fuel supply, ensuring the safety and stability of the fuel supply process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 is an isometric perspective structural schematic diagram of the power-free fuel supply system according to the first embodiment of the present invention;

[0039] Figure 2 is a front view structural schematic diagram of the power-free fuel supply system according to the first embodiment of the present invention;

[0040] Figure 3 is a sectional structural schematic diagram of the circulating suction pipeline and the negative pressure generating unit according to the first embodiment of the present invention;

[0041] Figure 4 is a partial structural schematic diagram of the power-free fuel supply system according to the second embodiment of the present invention.

[0042] Among them, the reference numerals are as follows:

[0043] 1. Oil tank; 11. Liquid level measurement port; 12. Explosion-proof liquid level gauge; 13. Maintenance hole;

[0044] 2. Oil outlet pipeline; 21. Manual ball valve; 22. Filter; 23. First row of oil and gas pneumatic ball valves; 24. Second row of oil and gas pneumatic ball valves;

[0045] 3. Oil inlet pipeline; 31. Inlet oil and gas pneumatic ball valve;

[0046] 4. Exhaust pipeline; 41. Exhaust ball valve;

[0047] 5. Circulation negative pressure pipeline; 51. Tank connection branch; 511. Shunt tee; 512. First circulation ball valve; 52. Circulation branch; 521. Second circulation ball valve; 522. Third circulation ball valve; 523. Exhaust tee; 53. Circulation measuring pipe; 54. Explosion-proof barometer;

[0048] 6. Quantitative pump oil unit; 61. Oil suction cylinder; 611. Oil suction inlet end; 612. Oil suction outlet end; 62. Pump oil driving cylinder; 63. Pipe tee;

[0049] 7. Vacuum tank;

[0050] 8. Circulation air extraction pipeline; 81. Air extraction control branch; 811. First control ball valve; 812. Second control ball valve; 813. Third control ball valve; 814. Fourth control ball valve; 82. Auxiliary branch; 83. Oil-water separator; 84. First tee connector; 85. Second tee connector; 86. Third tee connector; 87. Fourth tee connector;

[0051] 9. Negative pressure generating unit; 91. Suction cylinder; 911. First suction side; 912. Second suction side; 92. Suction driving cylinder;

[0052] 10. Boosting unit. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0054] In view of this, a non-electrically powered oil supply system is provided in the detailed implementation manners, effectively solving the technical problems of the existing oil supply device such as easy occurrence of electrical fire, insufficient control of oil and gas volatilization pressure, and complex oil supply system.

[0055] Figure 1 It is an isometric perspective structural schematic diagram of the non-electrically powered oil supply system in the first embodiment of the present invention; Figure 2 It is a front view structural schematic diagram of the non-electrically powered oil supply system in the first embodiment of the present invention.

[0056] The first embodiment of the non-electrically powered oil supply system is as Figure 1 and Figure 2As shown in the figure, it includes an oil tank 1. An oil outlet pipeline 2 is installed at the bottom of the oil tank 1, and an oil inlet pipeline 3, an exhaust pipeline 4, and a circulating negative pressure pipeline 5 are provided at the top. The exhaust pipeline 4 and the circulating negative pressure pipeline 5 are connected in a controllable opening and closing manner. And a vacuum tank 7, the vacuum tank 7 is connected to the top of the oil tank 1 and the circulating negative pressure pipeline 5 in a controllable opening and closing manner. And a circulating air extraction pipeline 8, the circulating air extraction pipeline 8 is provided with an air extraction end, an exhaust end, and two negative pressure ends. The air extraction end is connected to the vacuum tank 7, and an oil-water separator 83 is connected to the exhaust end. And a cylinder-driven negative pressure generating unit 9, the negative pressure generating unit 9 is connected to the two negative pressure ends. A plurality of pneumatically controlled switches are provided on the circulating air extraction pipeline 8, and the connection pipelines between the negative pressure generating unit 9 and the oil-water separator 83 and the vacuum tank 7 are cyclically switched through the two negative pressure ends, so that the negative pressure generating unit 9 extracts and discharges gas from the vacuum tank 7 to the exhaust end during both suction and exhaust. With air pressure as the driving force, during oil storage, the vacuum tank 7 is maintained at a negative pressure through the negative pressure generating unit 9, so that the oil in the oil inlet pipeline 3 is sucked into the oil tank 1. During oil discharge, the exhaust pipeline 4 is communicated with the oil tank 1, so that the oil in the oil tank 1 is discharged from the oil outlet pipeline 2. A cylinder-driven metering pump oil unit 6 is provided on the oil outlet pipeline 2.

[0057] Among them, the cylinder-driven metering pump oil unit 6 provided on the oil outlet pipeline 2 is used to accelerate and pressurize the oil in the oil tank 1 to be discharged from the oil outlet pipeline 2.

[0058] The specific structure of the oil inlet pipeline 3 is set as follows: both ends of the oil inlet pipeline 3 are respectively connected to the top of the oil tank 1 and the external oil depot to be connected; an oil inlet pneumatic ball valve 31 is installed on the oil inlet pipeline 3.

[0059] Outside the automobile factory, that is, at a position far from the non-electric power-driven fuel supply system, a control cabinet is set up. A control module is set in the control cabinet, and the control module is electrically connected to a pneumatic control island. A plurality of solenoid valves are set in the pneumatic control island, and the plurality of solenoid valves are respectively connected to the pneumatic components of the oil inlet pipeline 3, the exhaust pipeline 4, the circulating negative pressure pipeline 5, the metering pump oil unit 6, the circulating air extraction pipeline 8, and the negative pressure generating unit 9 through air pipelines.

[0060] Specifically, the pneumatic components include a plurality of pneumatically controlled ball valves, a plurality of driving cylinders, etc.

[0061] Among them, in order to measure the fuel quantity in the oil tank 1 at any time, a liquid level measurement port 11 is provided at the top of the oil tank 1, and an explosion-proof liquid level gauge 12 is installed at the liquid level measurement port 11.

[0062] During application, the explosion-proof liquid level gauge 12 is electrically connected to the control module. The fuel quantity data in the oil tank 1 is obtained in real time through the explosion-proof liquid level gauge 12, and the collected fuel quantity data is fed back to the control module. The control module controls the pneumatic control island through the built-in algorithm. The pneumatic control island controls the pneumatic components of the oil inlet pipeline 3, the exhaust pipeline 4, the circulating negative pressure pipeline 5, the metering pump oil unit 6, the circulating air extraction pipeline 8 and the negative pressure generating unit 9 through multiple solenoid valves, so as to realize the air extraction action of the vacuum tank 7, the action of assisting the oil in the oil inlet pipeline 3 to be sucked into the oil tank 1, the oil discharge action of the exhaust pipeline 4 and the oil tank 1, and the accelerated oil discharge action of the metering pump oil unit 6 and the oil tank 1.

[0063] Among them, a maintenance hole 13 is also provided on the tank wall of the oil tank 1, which is used to clean the inside of the oil tank 1 when the oil supply system without electric power drive is stopped, so as to clean the impurities deposited by the fuel in the oil tank 1.

[0064] The oil supply system without electric power drive adopts a pneumatic drive mode, which avoids the risk of fire or explosion caused by electrical faults of traditional electric oil supply devices, and greatly improves the safety; the whole oil supply system does not require motors, electric control units and related electrical components, and is more reliable when used in flammable and explosive environments such as automobile production plants.

[0065] Through the cooperation of the negative pressure generating unit 9 and the vacuum tank 7, when the oil tank 1 stores oil, a negative pressure is always maintained in the oil tank 1, so as to realize the efficient suction of fuel from the oil inlet pipeline 3 into the oil tank 1 and achieve efficient and rapid fuel delivery.

[0066] In addition, the system uses the circulating air extraction pipeline 8, the negative pressure generating unit 9 and the oil-water separator 83 to work together to maintain the negative pressure in the vacuum tank 7 and the oil tank 1, and effectively discharge the gas generated by the fuel volatilization in the oil tank 1 in the vacuum tank 7, reduce the pressure in the vacuum tank 7 and the oil tank 1, and avoid the safety hazards caused by excessive pressure due to fuel volatilization; at the same time, the circulating air extraction pipeline 8, the vacuum tank 7 and the oil tank 1 accelerate the suction of fuel when filling fuel, and maintain negative pressure and discharge the gas generated by fuel volatilization when storing fuel, constituting a synergistic effect of efficient fuel delivery and safe fuel storage.

[0067] At the same time, the system uses the exhaust pipeline 4 and the oil tank 1. When discharging oil, the exhaust pipeline 4 is connected to the oil tank 1, and the connection between the oil tank 1 and the vacuum tank 7 is closed, so that the oil tank 1 returns to positive pressure, and the oil in the oil tank 1 flows out by gravity from the oil outlet pipeline 2.

[0068] In addition, a metering pump oil unit 6 driven by a cylinder can be used to control the fuel supply flow rate, making the fuel supply process more precise, reducing fuel waste. The metering pump oil unit 6 can also use the power driven by the cylinder to provide additional suction for discharging fuel from the fuel tank 1 and pressurize the fuel discharged from the metering pump oil unit 6, accelerating the fuel discharge and supply, thereby improving the filling efficiency.

[0069] Compared with traditional electric fuel supply devices, the pneumatic fuel supply structure of the present invention without an electric power-driven fuel supply system is reasonably designed, easy to operate, without a complex electric control system, reducing the equipment maintenance cost, while improving the system stability and service life. Through the controllable opening and closing pipeline design, the system realizes the efficient collaborative work of multiple components such as the fuel tank 1, the fuel inlet pipeline 3, the exhaust pipeline 4, the circulating negative pressure pipeline 5, the metering pump oil unit 6, the circulating suction pipeline 8, the negative pressure generating unit 9, the vacuum tank 7, and the oil-water separator 83, making the fuel supply process smoother, and is applicable to fuel supply scenarios such as automobile production factories and enclosed sites that require high safety and high stability.

[0070] As an optional implementation manner

[0071] Regarding the specific structure of the above-mentioned circulating negative pressure pipeline 5, in this embodiment Figure 1 and Figure 2 As shown, the circulating negative pressure pipeline 5 includes a tank connection branch 51 and a circulating branch 52; the tank connection branch 51 connects the fuel tank 1 and the vacuum tank 7, and a shunt three-way 511 is installed between the vacuum tank 7 and the fuel tank 1; the shunt three-way 511 is connected to one end of the circulating branch 52, and the other end of the circulating branch 52 is connected to the vacuum tank 7; on the tank connection branch 51, a pneumatically controlled first circulating ball valve 512 is arranged between the shunt three-way 511 and the vacuum tank 7; on the circulating branch 52, a pneumatically controlled second circulating ball valve 521 and a third circulating ball valve 522 are arranged, the second circulating ball valve 521 is arranged adjacent to the shunt three-way 511, and the third circulating ball valve 522 is arranged adjacent to the vacuum tank 7; in the circulating branch 52, the pipeline connecting the second circulating ball valve 521 and the third circulating ball valve 522 is the circulating measurement pipe 53, one end of the circulating measurement pipe 53 is connected to the second circulating ball valve 521, the third circulating ball valve 522 is connected to the pipe wall interface of the circulating measurement pipe 53, and an explosion-proof barometer 54 is installed at the other end of the circulating measurement pipe 53.

[0072] Specifically, regarding the specific structure of the above-mentioned exhaust pipeline 4 and the specific connection structure between the exhaust pipeline 4 and the circulating negative pressure pipeline 5, in this embodiment Figure 1 and Figure 2 As shown, an exhaust three-way 523 is arranged on the circulating branch 52, and the exhaust three-way 523 connects the second circulating ball valve 521, the circulating measurement pipe 53, and the exhaust pipeline 4; a pneumatically controlled exhaust ball valve 41 is installed on the exhaust pipeline 4.

[0073] When in use, before starting to store oil, the oil outlet pipeline 2, the oil inlet pipeline 3 and the exhaust pipeline 4 are closed by starting control, and at least the first circulation ball valve 512 and the second circulation ball valve 521 or the third circulation ball valve 522 of the tank connecting branch 51 of the circulating negative pressure pipeline 5 are opened, and the pneumatic ball valves of the tank connecting branch 51 and the circulation branch 52 can also be opened at the same time, so that the channel between the oil tank 1 and the vacuum tank 7 is opened, and the explosion-proof barometer 54 on the circulating measuring tube 53 measures the air pressure value of the vacuum tank 7; then the circulating air extraction pipeline 8 and the negative pressure generating unit 9 are controlled to start to extract air from the vacuum tank 7, so that the air pressure in the vacuum tank 7 and the oil tank 1 is reduced and a negative pressure is formed.

[0074] Since the oil tank 1 and the vacuum tank 7 are connected at least through the tank connecting branch 51 of the circulating negative pressure pipeline 5, the overall air pressure of the vacuum tank 7 and the oil tank 1 can be measured by the explosion-proof pressure gauge 54; after the overall air pressure of the vacuum tank 7 and the oil tank 1 reaches the preset negative pressure value, the tank connecting branch 51 is temporarily closed, and the oil inlet pipeline 3 is opened. When the explosion-proof liquid level gauge 12 measures the fuel volume data in the oil tank 1 and displays that the oil tank 1 has been filled with normal fuel, the tank connecting branch 51 is reopened at this time, and the circulating branch 52 is opened at the same time, and the circulating air extraction pipeline 8 and the negative pressure generating unit 9 continue to work. When the explosion-proof liquid level gauge 12 measures that the oil volume in the oil tank 1 reaches 90%, the circulating air extraction pipeline 8 and the negative pressure generating unit 9 are automatically suspended and the oil inlet pipeline 3 is closed; the oil storage state is entered, and oil supply and discharge are waited for demand.

[0075] After the oil tank 1 enters the oil storage state, the tank connection branch 51 is closed and the circulation branch 52 is not closed. When the explosion-proof barometer 54 detects that the air pressure of the vacuum tank 7 drops by more than 30%, the third circulation ball valve 522 and the second circulation ball valve 521 remain open, and the circulation negative pressure pipeline 5 and the negative pressure generating unit 9 are opened to extract the volatilized gas of the fuel and restore the air pressure of the vacuum tank 7 to the predetermined negative pressure value.

[0076] Regarding the specific control structure of the oil outlet pipeline 2, this embodiment Figure 1 and Figure 2 As shown, the two ends of the oil outlet pipeline 2 are respectively connected to the bottom of the oil tank 1 and the oil gun to be used or the terminal oil supply pipeline; on the oil outlet pipeline 2, along the direction of oil discharge, a manual ball valve 21, a filter 22, a first oil discharge pneumatic ball valve 23, a metering pump oil unit 6 and a second oil discharge pneumatic ball valve 24 are sequentially provided; the manual ball valve 21 is arranged adjacent to the oil tank 1, and the second oil discharge pneumatic ball valve 24 is arranged adjacent to the oil gun to be used or the terminal oil supply pipeline.

[0077] Specifically, the filter 22 is a Y-shaped filter 22 .

[0078] When oil storage is put into use, the manual ball valve 21 can be kept normally open, and when oil supply is required, oil is supplied through the first oil-discharging pneumatic ball valve 23, the quantitative oil pump unit 6 and the second oil-discharging pneumatic ball valve 24.

[0079] Regarding the specific structure of the quantitative pump oil unit 6, this embodiment Figure 1 and Figure 2 As shown, the quantitative oil pumping unit 6 includes an oil suction cylinder 61 and an oil pumping driving cylinder 62; the oil suction inlet end 611 of the oil suction cylinder 61 is connected to the oil outlet pipeline 2 through a pipeline tee 63; the oil pumping driving cylinder 62 is installed on the oil suction outlet end 612 of the oil suction cylinder 61, and the telescopic rod of the oil pumping driving cylinder 62 extends from the oil suction outlet end 612 into the oil suction cylinder 61 and is connected to the piston of the oil suction cylinder 61.

[0080] During application, after receiving the oil supply demand, close the first circulation ball valve 512 of the tank connection branch 51, close the third circulation ball valve 522 of the circulation branch 52, and open the exhaust pipe 4; when starting to pump oil, first control the first oil discharge pneumatic ball valve 23 to open, and then control the pumping oil driving cylinder 62 of the quantitative pumping oil unit 6 to make the suction cylinder 61 suck the fuel from the oil tank 1, after the suction cylinder 61 sucks in enough fuel, close the first oil discharge pneumatic ball valve 23, and then open the second oil discharge pneumatic ball valve 24, and make the pumping oil driving cylinder 62 of the quantitative pumping oil unit 6 press out the fuel, so that the suction cylinder 61 sprays out the pressurized fuel, and so on, forming a continuous pressurized oil supply action.

[0081] Figure 1 2 is a schematic diagram of the structure of the oil supply system without electrical power drive according to the first embodiment of the present invention from an axonometric perspective; Figure 2 2 is a front view of the structure of the oil supply system without electrical power drive according to the first embodiment of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of a circulating air extraction pipeline and a negative pressure generating unit according to the first embodiment of the present invention.

[0082] Regarding the specific structure of the circulating exhaust pipeline 8, this embodiment Figures 1 to 3As shown in the figure, the circulating air extraction pipeline 8 includes an air extraction control branch 81, an auxiliary branch 82, and a first three-way connector 84. The air extraction control branch 81 and the auxiliary branch 82 are connected end to end and communicate with each other. The ends of the air extraction control branch 81 and the auxiliary branch 82 in the vertical direction are connected through the first three-way connector 84 and are connected to the oil-water separator 83. On the air extraction control branch 81, a second three-way connector 85, a third three-way connector 86, and a fourth three-way connector 87 are sequentially installed from bottom to top in the vertical direction. One end of the second three-way connector 85 and the fourth three-way connector 87 is respectively a negative pressure end, which is connected to the negative pressure generating unit 9. One end of the third three-way connector 86 is an air extraction end, which is connected to the vacuum tank 7. On the air control branch, a first control ball valve 811, a second control ball valve 812, a third control ball valve 813, and a fourth control ball valve 814 are sequentially installed from bottom to top in the vertical direction. The first control ball valve 811 is arranged between the first three-way connector 84 and the second three-way connector 85. The second control ball valve 812 is arranged between the second three-way connector 85 and the third three-way connector 86. The third control ball valve 813 is arranged between the third three-way connector 86 and the fourth three-way connector 87. The fourth control ball valve 814 is arranged between the fourth three-way connector 87 and the connecting elbow connecting the auxiliary branch 82.

[0083] Specifically, regarding the specific structure of the above-mentioned negative pressure generating unit 9 and the specific connection structure between the negative pressure generating unit 9 and the circulating air extraction pipeline 8, this embodiment is as follows Figures 1 to 3 As shown in the figure, the negative pressure generating unit 9 includes an air suction cylinder 91 and an air suction driving cylinder 92. The first air suction side 911 of the air suction cylinder 91 is connected to the air extraction control branch 81 through the second three-way connector 85. The second air suction side 912 of the air suction cylinder 91 is connected to the air extraction control branch 81 through the fourth three-way connector 87. The air suction driving cylinder 92 is installed below the air suction cylinder 91. The telescopic rod of the air suction driving cylinder 92 extends into the air suction cylinder 91 and is connected to the piston of the air suction cylinder 91.

[0084] When in application, when it is necessary to extract the gas in the vacuum tank 7 and the oil tank 1, or in the vacuum tank 7, the circulating air extraction pipeline 8 and the negative pressure generating unit 9 are turned on to enter the air extraction step.

[0085] At this time, the suction driving cylinder 92 is in the initial position of retracting the telescopic rod, and the piston in the suction cylinder 91 is also located on the first suction side 911 along with the telescopic rod. First, the third control ball valve 813 is closed, the fourth control ball valve 814 is opened, the second control ball valve 812 is opened, the first control ball valve 811 is closed, and then the suction driving cylinder 92 is driven. The telescopic rod of the suction driving cylinder 92 extends to push the piston to move towards the second suction side 912, and the gas in the suction cylinder 91 is pushed out. The pushed-out gas enters the air extraction control branch 81 through the fourth three-way connector 87, passes through the fourth control ball valve 814, enters the auxiliary branch 82, then enters the air extraction control branch 81 again and is blocked by the first control ball valve 811, and enters the oil-water separator 83 through the first three-way connector 84, and finally the gas is discharged. At the same time, the gas in the vacuum tank 7 enters the air extraction control branch 81 through the third three-way connector 86, and after being blocked by the third control ball valve 813, it sequentially passes through the second control ball valve 812 and the second three-way connector 85 and enters the suction cylinder 91, completing the first round of negative-pressure suction and exhaust steps.

[0086] At this time, the suction driving cylinder 92 is in the striking position of extending the telescopic rod, and the piston in the suction cylinder 91 is also located on the second suction side 912 along with the telescopic rod. First, the second control ball valve 812 is closed, the fourth control ball valve 814 is closed, the first control ball valve 811 is opened, the third control ball valve 813 is opened, and then the suction driving cylinder 92 is driven. The telescopic rod of the suction driving cylinder 92 retracts, and the piston in the suction cylinder 91 also moves from the second suction side 912 towards the first suction side 911. At this time, the gas located on the first suction side 911 in the suction cylinder 91 is discharged from the first suction side 911, passes through the second three-way connector 85, the first control ball valve 811, and the first three-way connector 84, enters the oil-water separator 83, and finally the gas is discharged. At the same time, the gas in the vacuum tank 7 enters the suction cylinder 91 through the third three-way connector 86, the third control ball valve 813, and the fourth three-way connector 87, completing the second round of negative-pressure suction and exhaust steps.

[0087] The first round of negative-pressure suction and exhaust steps and the second round of negative-pressure suction and exhaust steps are cycled, so as to control multiple pneumatically controlled switches on the circulating suction pipe 8, and by cyclically switching the connecting pipelines between the negative-pressure generating unit 9 and the oil-water separator 83 and the vacuum tank 7 at the two negative-pressure ends, the negative-pressure generating unit 9 can suck and discharge gas from the vacuum tank 7 to the exhaust end during both suction and exhaust processes, realizing the efficient suction of the gas in the vacuum tank 7 and the oil tank 1, or the gas in the vacuum tank 7, making the vacuum tank 7 and the oil tank 1, or the inside of the vacuum tank 7 form a negative-pressure state, and providing pneumatic power for filling the oil tank 1 through the oil inlet pipeline 3.

[0088] Figure 4 It is a partial structural schematic diagram of the oil supply system without electric power drive in the second embodiment of the present invention.

[0089] The second embodiment of the non-electric power-driven oil supply system is as follows Figure 4 As shown, the difference between this embodiment and the first embodiment is that the exhaust ball valve 41 is a three-way ball valve; the three-way ball valve is also connected to a pressurization unit 10.

[0090] Specifically, the three-way ball valve can control the opening and closing of the exhaust pipe 4 and the exhaust three-way 523, and the opening and closing of the exhaust three-way 523 and the pressurization unit 10.

[0091] When in application, when the exhaust pipe 4 is connected to the oil tank 1 and rapid oil discharge is required, the three-way ball valve controls the connection between the exhaust three-way 523 and the pressurization unit 10, and pressurizes the oil tank 1 through the pressurization unit 10, so that the oil in the oil tank 1 quickly discharges from the oil outlet pipe 2.

[0092] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A non-electrical power driven oil supply system, characterized in that: It includes an oil tank, the bottom of which is provided with an oil outlet pipeline, and the top of which is provided with an oil inlet pipeline, an exhaust pipeline and a circulating negative pressure pipeline; the exhaust pipeline is connected to the circulating negative pressure pipeline in a controllable opening and closing manner; and a vacuum tank, wherein the vacuum tank is connected to the top of the oil tank and the circulating negative pressure pipeline in a controllable opening and closing manner; and a circulating air extraction pipeline, wherein the circulating air extraction pipeline is provided with an air extraction end, an air exhaust end and two negative pressure ends; the air extraction end is connected to the vacuum tank, and the air exhaust end is connected to an oil-water separator; and a negative pressure generating unit driven by a cylinder, wherein the negative pressure generating unit is connected to the two negative pressure ends; The circulating exhaust pipeline is provided with a plurality of pneumatically controlled switches, which cyclically switch the connection pipelines between the negative pressure generating unit and the oil-water separator and the vacuum tank through the two negative pressure ends, so that the negative pressure generating unit can extract gas from the vacuum tank and discharge it to the exhaust end in one suction and one exhaust; With air pressure as the driving force, when storing oil, the vacuum tank is maintained at negative pressure through the negative pressure generating unit, so that the oil in the oil inlet pipeline is sucked into the oil tank; when discharging oil, the exhaust pipeline is connected with the oil tank, so that the oil in the oil tank is discharged from the oil outlet pipeline; The oil outlet pipeline is provided with a cylinder-driven quantitative oil pump unit.

2. The non-electrical power driven oil supply system according to claim 1, characterized in that: A liquid level measuring port is provided on the top of the oil tank, and an explosion-proof liquid level gauge is installed on the liquid level measuring port.

3. The non-electrical power driven oil supply system according to claim 1, characterized in that: The two ends of the oil outlet pipeline are respectively connected to the bottom of the oil tank and the oil gun or the terminal oil supply pipeline to be used; On the oil outlet pipeline, along the oil discharge direction, a manual ball valve, a filter, a first oil discharge pneumatic ball valve, the quantitative oil pump unit and a second oil discharge pneumatic ball valve are sequentially arranged; The manual ball valve is arranged adjacent to the oil tank, and the second oil-discharging pneumatic ball valve is arranged adjacent to the oil gun or the terminal oil supply pipeline to be used.

4. The non-electrical power driven oil supply system according to claim 3, characterized in that: The quantitative oil pump unit comprises an oil suction cylinder and an oil pump driving cylinder; The oil suction inlet end of the oil suction cylinder is connected to the oil outlet pipeline through a pipeline tee; The oil pump driving cylinder is installed on the oil suction outlet end of the oil suction cylinder, and the telescopic rod of the oil pump driving cylinder extends from the oil suction outlet end into the oil suction cylinder and is connected with the piston of the oil suction cylinder.

5. The non-electrical power driven oil supply system according to claim 1, characterized in that: The two ends of the oil inlet pipeline are respectively connected to the top of the oil tank and the external oil depot to be connected; An oil inlet pneumatic ball valve is installed on the oil inlet pipeline.

6. The non-electrical power driven oil supply system according to claim 1, characterized in that: The circulating negative pressure pipeline includes a tank connection branch and a circulation branch; the tank connection branch connects the oil tank and the vacuum tank, and a flow dividing tee is installed between the vacuum tank and the oil tank; The flow dividing tee is connected to one end of the circulation branch, and the other end of the circulation branch is connected to the vacuum tank; On the tank connection branch, a pneumatically controlled first circulation ball valve is provided between the diversion tee and the vacuum tank; A pneumatically controlled second circulation ball valve and a third circulation ball valve are arranged on the circulation branch, the second circulation ball valve is arranged adjacent to the diversion tee, and the third circulation ball valve is arranged adjacent to the vacuum tank; In the circulation branch, the pipeline connecting the second circulation ball valve and the third circulation ball valve is a circulation measuring tube, one end of the circulation measuring tube is connected to the second circulation ball valve, the third circulation ball valve is connected to the tube wall interface of the circulation measuring tube, and the other end of the circulation measuring tube is installed with an explosion-proof pressure gauge.

7. The non-electrical power driven oil supply system according to claim 6, characterized in that: An exhaust tee is provided on the circulation branch, and the exhaust tee is connected to the second circulation ball valve, the circulation measuring tube and the exhaust pipeline; and a pneumatically controlled exhaust ball valve is installed on the exhaust pipeline.

8. The non-electrical power driven oil supply system according to claim 7, characterized in that: The exhaust ball valve is a three-way ball valve; the three-way ball valve is also connected to a booster unit; The three-way ball valve can control the opening and closing of the exhaust pipeline and the exhaust three-way valve, and the opening and closing of the exhaust three-way valve and the supercharging unit; When the exhaust pipeline is connected to the oil tank and the oil needs to be discharged quickly, the three-way ball valve controls the exhaust tee to be connected to the booster unit, and the oil tank is pressurized by the booster unit, so that the oil in the oil tank is quickly discharged from the oil outlet pipeline.

9. The non-electrical power driven oil supply system according to claim 1, characterized in that: The circulating air extraction pipeline includes an air extraction control branch, an auxiliary branch and a first three-way connector, the air extraction control branch and the auxiliary branch are connected end to end, and the ends of the air extraction control branch and the auxiliary branch in the vertical direction are connected through the first three-way connector and connected to the oil-water separator; On the exhaust control branch, a second three-way connector, a third three-way connector and a fourth three-way connector are installed in sequence from bottom to top in the vertical direction; One end of the second three-way connector and the fourth three-way connector are respectively the negative pressure ends, connected to the negative pressure generating unit; One end of the third three-way connector is the vacuum end, connected to the vacuum tank; On the air extraction control branch, a first control ball valve, a second control ball valve, a third control ball valve and a fourth control ball valve are installed in sequence from bottom to top in the vertical direction; The first control ball valve is arranged between the first three-way connector and the second three-way connector; the second control ball valve is arranged between the second three-way connector and the third three-way connector; the third control ball valve is arranged between the third three-way connector and the fourth three-way connector; the fourth control ball valve is arranged between the fourth three-way connector and the connecting elbow connected to the auxiliary branch.

10. The non-electrical power driven oil supply system according to claim 9, characterized in that: The negative pressure generating unit comprises an air suction cylinder and an air suction driving cylinder; The first air suction side of the air suction cylinder is connected to the air extraction control branch through the second three-way connector; The second air suction side of the air suction cylinder is connected to the air extraction control branch through the fourth three-way connector; The air suction drive cylinder is installed under the air suction cylinder, and the telescopic rod of the air suction drive cylinder extends into the air suction cylinder and is connected with the piston of the air suction cylinder.

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