An explosion-proof oil cleaning apparatus

Abstract

The application discloses an explosion-proof oil cleaning equipment, and belongs to the technical field of oil cleaning equipment, which comprises a tank body, a pneumatic diaphragm pump, a jet device, a filter, a liquid conveying assembly and an oil collecting assembly. A tray for placing workpieces is arranged in the tank body, and a plurality of through holes are formed in the tray. The tank body is provided with the pneumatic diaphragm pump on one side, and the water outlet end of the pneumatic diaphragm pump is communicated with the jet device. The oil collecting assembly comprises an oil discharge hopper, a hose and an oil tank. The pump body is driven by the workshop gas source in the whole process, and there is no safety hazard of electric spark explosion, which is suitable for the explosion-proof specification of the aviation oil station. The micro-nano bubbles can remove the deep oil stains of the workpieces, and the filter can delay the invalidation of the cleaning liquid. The floating oil collecting operation is performed, so that the workers do not need to additionally perform the operations of fishing or pouring floating oil, the artificial labor intensity is reduced, time and labor are saved, the continuous volatilization of the floating oil in the operation space is reduced, and the explosion-proof control pressure of the aviation oil station is further reduced.

Description

Technical Field

[0001] This invention relates to the field of oil stain cleaning equipment technology, and in particular to an explosion-proof oil cleaning equipment. Background Technology

[0002] Cleaning aviation fuel components is a crucial aspect of the operational safety management of civil aviation fuel supply stations. This involves using specialized aviation fuel cleaning equipment to remove sludge and oil contaminants from various components such as fuel filters, refueling connectors, pipeline valves, and metering devices. This step is critical for controlling the cleanliness of aviation fuel equipment, preventing fuel pipeline blockages, and eliminating the safety hazards of fuel gas explosions. Currently, with the rapid development of my country's civil aviation transportation industry, the scale of airport fuel supply support is continuously expanding, and the frequency of aviation fuel equipment maintenance is significantly increasing. This places stringent requirements on the cleaning cleanliness, fuel gas explosion-proof safety performance, oil contamination recovery and treatment capabilities, and adaptability to continuous on-site operations of aviation fuel cleaning equipment.

[0003] Currently, most aviation fuel cleaning equipment uses open immersion tanks. While this method is simple in structure and low in cost, and can meet the basic cleaning needs of small components with light oil contamination, it has several drawbacks in actual operation and maintenance at aviation fuel depots. These include poor oil removal capabilities, difficulty in completely removing deep-seated aviation fuel residue from workpieces, and rapid accumulation and deterioration of the cleaning water, leading to frequent water changes and increased maintenance costs. Furthermore, aviation fuel is a flammable and explosive medium, and traditional cleaning equipment contains built-in electric heating elements such as drive motors. Aviation fuel cleaning equipment often involves the accumulation of large amounts of volatile oil vapors in the work area, which poses a significant safety risk of fire and deflagration due to electrical sparks generated by internal components. This makes it difficult to meet the stringent explosion-proof regulations for aviation fuel depots, resulting in poor safety. In addition, existing cleaning equipment usually does not have a floating oil collection structure. The floating oil that is washed off from the workpiece often floats on the water surface for a long time, requiring workers to clean the floating oil a second time. This not only increases the labor intensity of the workers, but also makes the floating oil continue to evaporate in the work space, further increasing the explosion prevention and control pressure of aviation fuel stations.

[0004] Therefore, how to structurally improve the aviation fuel cleaning equipment at aviation fuel stations to solve the problems of insufficient cleanliness of workpieces, rapid accumulation of impurities in water leading to failure, frequent water changes increasing maintenance costs, poor explosion-proof safety performance, and inability to automatically recover floating oil, which increases the pressure on explosion-proof control at aviation fuel stations and makes it difficult to meet the explosion-proof operation and maintenance standards of aviation fuel stations, is an urgent technical problem to be solved in the field of aviation fuel operation and maintenance equipment. Summary of the Invention

[0005] The main objective of this invention is to provide an explosion-proof oil cleaning device to solve the problems of insufficient oil cleanliness of workpieces, rapid accumulation and failure of water in existing aviation oil cleaning equipment, resulting in frequent water changes that increase maintenance costs, poor explosion-proof safety performance of the equipment, and inability to automatically recover floating oil, which increases the explosion-proof control pressure of aviation fuel stations and makes it difficult to meet the explosion-proof operation and maintenance specifications of aviation fuel stations.

[0006] To achieve the above objectives, the present invention provides an explosion-proof oil cleaning device, comprising a tank, a pneumatic diaphragm pump, an ejector, a filter, a liquid delivery assembly, and an oil collection assembly. The tank contains a tray for placing workpieces, and the tray has multiple through holes. The pneumatic diaphragm pump, connected to a workshop air source, is located on one side of the tank. The inlet of the pneumatic diaphragm pump is connected to the bottom of the tank's inner cavity via the filter and the liquid delivery assembly, enabling the pneumatic diaphragm pump to draw cleaning fluid from the tank. The outlet of the pneumatic diaphragm pump is connected to the ejector, which converts the cleaning fluid output by the pneumatic diaphragm pump into atomized bubble water and sprays it onto the surface of the workpieces in the tank to rinse away oil stains.

[0007] The oil collection assembly includes an oil drain hopper, a hose, and an oil tank. The oil drain hopper floats on the surface of the cleaning fluid in the tank. The hose is connected to the oil drain hopper and the oil tank respectively. The oil drain hopper is used to collect floating oil on the surface of the cleaning fluid and transport the floating oil to the oil tank through the hose.

[0008] Preferably, the infusion assembly further includes a water pump pipe, which is disposed at the bottom of the inner cavity of the tank and connected to the water inlet of the pneumatic diaphragm pump. The water pump pipe extends circumferentially along the tank body, and multiple water inlets are provided on the side of the water pump pipe facing the bottom surface of the inner cavity of the tank body. The multiple water inlets are evenly and spaced apart along the circumference of the tank body.

[0009] Preferably, the outlet end of the pumping pipe extends out of the tank body and is connected to a first connector. The infusion assembly includes an infusion pipe and a first valve. The two ends of the infusion pipe are respectively connected to the inlet end of the pneumatic diaphragm pump and the filter. The end of the filter away from the pneumatic diaphragm pump is connected to the first valve, and one end of the first valve is connected to the first connector.

[0010] Preferably, the oil collection assembly further includes a one-way valve, a second valve, and a second connector. The second connector is disposed on the outer wall of the tank and communicates with the hose. The second valve is communicated with both the one-way valve and the second connector. The end of the one-way valve away from the second valve is detachably connected to the oil tank.

[0011] Preferably, a first level gauge is provided on the oil tank; a plug is detachably installed on the bottom surface of the oil tank.

[0012] Preferably, the device further includes a purging assembly. A partition is provided on the top surface of the tray, which divides the inner cavity of the tank into a cleaning chamber and a drying chamber. A support for installing the jet injector is provided on the top of the cleaning chamber. The purging assembly is provided on the top of the drying chamber and is used to blow airflow onto the workpiece in the drying chamber.

[0013] Preferably, the purging assembly includes an air blowing pipe and an air supply pipe. The air supply pipe is connected to the air blowing pipe and the workshop air source, respectively. The air blowing pipe extends circumferentially along the drying chamber, and the air blowing pipe has a plurality of through holes evenly and at intervals along its extension direction. The plurality of through holes are all arranged facing the center of the drying chamber.

[0014] Preferably, a second level gauge communicating with the inner cavity of the tank is provided on the outer wall of the tank.

[0015] Beneficial effects:

[0016] 1. The explosion-proof oil cleaning equipment of the present invention uses a pneumatic diaphragm pump as the power source for the circulation of cleaning fluid. The pneumatic diaphragm pump is directly connected to the compressed air source in the workshop for driving. The whole machine has no built-in electric motor, electric heating element or other parts that are prone to generating electric sparks, thus eliminating the safety hazard of electric sparks igniting volatile oil and gas. It is compatible with the explosion-proof operation specifications in the flammable and explosive environment of aviation fuel stations, and solves the problem of traditional cleaning equipment being prone to combustion and explosion due to live parts and insufficient explosion-proof safety performance, thus greatly improving the safety of equipment use.

[0017] 2. The explosion-proof oil cleaning equipment of the present invention uses a pneumatic diaphragm pump to output high-pressure cleaning fluid. When the fluid flows through the ejector, it draws in air, forming a large number of micro-nano bubbles mixed with water and sprayed onto the surface of the workpiece. The micro-nano bubbles have extremely strong penetration ability and physical peeling effect, which can penetrate into narrow areas such as workpiece gaps and valve cavities to efficiently peel off firmly attached aviation fuel sludge. This solves the problems of insufficient cleanliness and deep oil residue on workpieces caused by traditional soaking cleaning methods, and significantly improves cleaning cleanliness and cleaning efficiency.

[0018] 3. The explosion-proof oil cleaning equipment of the present invention can transport floating oil to an oil tank outside the tank for unified storage and collection through an oil discharge hopper and hose, so that the staff does not need to perform additional operations to retrieve or dump the floating oil, which not only reduces the intensity of manual labor and saves time and effort, but also reduces the continuous evaporation of floating oil in the working space, further reducing the explosion-proof control pressure of aviation fuel stations.

[0019] 4. The explosion-proof oil cleaning equipment of the present invention has a filter installed at the water inlet of the pneumatic diaphragm pump, which can intercept impurities and sludge before the cleaning fluid enters the pump body, avoiding impurities from wearing the pump body and clogging the downstream pipeline. At the same time, the cleaning fluid is recycled in the tank, and with the continuous filtration and purification of the filter, it effectively slows down the rate of fouling and failure of the cleaning fluid, reduces the frequency of water changes, lowers the operation and maintenance cost of the site, and improves the continuous operation time and operational stability of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an explosion-proof oil cleaning device according to an embodiment of the present invention;

[0022] Figure 2 This is an isometric sectional view of an explosion-proof oil cleaning device according to an embodiment of the present invention;

[0023] Figure 3 This is a left view of an explosion-proof oil cleaning device according to an embodiment of the present invention;

[0024] Figure 4 This is a top view of an explosion-proof oil cleaning device according to an embodiment of the present invention;

[0025] Figure 5 yes Figure 4 Cross-sectional view at point AA;

[0026] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle.

[0027] In the diagram: 1-Tank; 2-Pneumatic diaphragm pump; 3-Ejector; 4-Filter; 5-Infusion assembly; 6-Oil collection assembly; 7-Tray; 8-Oil drain hopper; 9-Hose; 10-Oil tank; 11-Water suction pipe; 12-First connector; 13-Infusion pipe; 14-First valve; 15-Check valve; 16-Second valve; 17-Second connector; 18-First level gauge; 19-Baffle; 20-Cleaning chamber; 21-Drying chamber; 22-Air blowing pipe; 23-Air supply pipe; 24-Second level gauge. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Example 1:

[0035] This invention proposes an explosion-proof oil cleaning device.

[0036] In one embodiment of the present invention, an explosion-proof oil cleaning device includes a tank 1, a pneumatic diaphragm pump 2, an ejector 3, a filter 4, a liquid delivery assembly 5, and an oil collection assembly 6. The tank 1 is provided with a tray 7 for placing workpieces, and the tray 7 has multiple through holes. A pneumatic diaphragm pump 2 connected to the workshop air source is provided on one side of the tank 1. The water inlet of the pneumatic diaphragm pump 2 is connected to the bottom of the inner cavity of the tank 1 through the filter 4 and the liquid delivery assembly 5, so that the pneumatic diaphragm pump 2 can draw the cleaning liquid in the tank 1. The water outlet of the pneumatic diaphragm pump 2 is connected to the ejector 3, which is used to convert the cleaning liquid output by the pneumatic diaphragm pump 2 into atomized bubble water and spray it onto the surface of the workpiece in the tank 1 to rinse off the oil stains.

[0037] The oil collection assembly 6 includes an oil drain hopper 8, a hose 9, and an oil tank 10. The oil drain hopper 8 floats on the surface of the cleaning fluid in the tank 1. The hose 9 is connected to the oil drain hopper 8 and the oil tank 10 respectively. The oil drain hopper 8 is used to collect the floating oil on the surface of the cleaning fluid and transport the floating oil to the oil tank 10 through the hose 9.

[0038] Working principle: such as Figure 1 and Figure 2 As shown, in the explosion-proof oil cleaning equipment of the present invention, the tank 1 serves as the main support for the cleaning operation, and the tray 7 is set inside the tank 1 to support the aviation oil parts to be cleaned. Multiple through holes on the tray 7 allow the cleaning fluid and detached oil stains to pass freely through. The pneumatic diaphragm pump 2 serves as the power unit for the circulation of the cleaning fluid. Its inlet end is connected to the bottom of the inner cavity of the tank 1 through a filter 4 and a delivery assembly 5, and its outlet end is connected to an ejector 3. In specific operation, the pneumatic diaphragm pump 2 is connected to the workshop's compressed air source and started. The cleaning fluid is drawn from the bottom of the tank 1 through the delivery assembly 5. After being filtered by the filter 4, the cleaning fluid enters the pneumatic diaphragm pump 2, which then pressurizes and outputs it to the ejector 3. The ejector 3 utilizes the Venturi effect to convert the high-pressure cleaning fluid into atomized bubble water and spray it onto the surface of the workpiece. Through the penetration and peeling action of micro-nano bubbles, the oil stains on the surface of the workpiece are efficiently removed.

[0039] Specifically, such as Figure 1 and Figure 2As shown, in the explosion-proof oil cleaning equipment of the present invention, since a pneumatic diaphragm pump 2 connected to the workshop air source is provided on one side of the tank 1, the pneumatic diaphragm pump 2 is driven by compressed air, so that the whole machine does not need an external power supply, and there are no electric components such as motors and heating elements inside the whole machine that are prone to generating electric sparks. This eliminates the safety hazard of electric sparks igniting volatile oil and gas, and is compatible with the explosion-proof operation specifications in the flammable and explosive environment of aviation fuel stations. It solves the problem that traditional cleaning equipment is prone to combustion and explosion due to electric components and has insufficient explosion-proof safety performance, and greatly improves the safety of equipment use. Furthermore, since the outlet of the pneumatic diaphragm pump 2 is connected to the ejector 3, which can be a mature gas-liquid mixing component such as a Venturi ejector, the high-pressure cleaning fluid output by the pneumatic diaphragm pump 2 will form a negative pressure at the throat and automatically draw in air when it flows through the ejector 3. This allows the cleaning fluid and air to be fully mixed to form a large number of micro-nano bubbles in the atomized water flow. Micro-nano bubbles have the characteristics of small particle size, large specific surface area, slow rising speed, and strong penetration ability. They can penetrate into narrow areas that are difficult to reach by traditional cleaning methods, such as gaps in workpieces, inner cavities of valves, and the root of threads. At the same time, the micro-jet and impact force generated by the rupture of micro-nano bubbles can efficiently remove impurities such as aviation oil sludge that are firmly attached to the workpiece. This solves the problems of insufficient cleanliness and deep oil residue in the workpiece caused by traditional immersion cleaning methods, and significantly improves the cleaning cleanliness and cleaning efficiency.

[0040] Understandably, in actual use, the explosion-proof oil cleaning equipment of the present invention uses a pneumatic diaphragm pump 2 to draw cleaning fluid to clean the workpiece. The atomized micro-nano bubble water, under gravity, falls through the tray 7 into the bottom of the tank 1 and re-aggregates into cleaning fluid. This fluid is then drawn back into the pneumatic diaphragm pump 2 through the filter 4 and the infusion assembly 5 for repeated cleaning of the workpiece. During this process, the filter 4 continuously filters and purifies the circulating cleaning fluid, effectively slowing down the rate of fouling and deterioration of the cleaning fluid, reducing the frequency of water changes, and lowering the maintenance costs of aviation fuel depots. Simultaneously, due to the presence of the oil collection assembly 6, such as... Figure 2 and Figure 6 As shown, the oil drain hopper 8 in the oil collection assembly 6 floats on the surface of the cleaning fluid in the tank 1. The top opening of the oil drain hopper 8 is always flush with the water surface. As the cleaning fluid in the tank 1 circulates, the floating oil on the surface of the cleaning fluid will be continuously pushed to the opening of the oil drain hopper 8 by the water flow and automatically flow into the oil drain hopper 8. At this time, the floating oil can be transported to the oil tank 10 outside the tank 1 for unified storage and collection through the oil drain hopper 8 and the hose 9. This eliminates the need for workers to perform additional operations to retrieve or dump the floating oil, which reduces the intensity of manual labor, saves time and effort, and reduces the continuous evaporation of floating oil in the working space, further reducing the explosion prevention and control pressure of the aviation fuel station.

[0041] Example 2:

[0042] This embodiment is a preferred implementation based on Embodiment 1, aiming to further refine and optimize the fluid delivery component 5 of the explosion-proof oil cleaning equipment. Specifically, as follows... Figure 2 and Figure 5 As shown, the infusion assembly 5 also includes a water pumping pipe 11. The water pumping pipe 11 is located at the bottom of the inner cavity of the tank body 1 and is connected to the water inlet of the pneumatic diaphragm pump 2. The water pumping pipe 11 extends circumferentially along the tank body 1, and multiple water inlet holes are provided on the side of the water pumping pipe 11 facing the bottom surface of the inner cavity of the tank body 1. The multiple water inlet holes are evenly and spaced apart along the circumferential direction of the tank body 1.

[0043] In this embodiment, since the infusion assembly 5 also includes a water suction pipe 11, which is located at the bottom of the inner cavity of the tank 1 and extends circumferentially along the tank 1, the water suction pipe 11 can cover the entire circumferential area of ​​the bottom of the tank 1, rather than pumping water only at a single point. This achieves uniform suction of the cleaning fluid in the tank 1 and avoids the existence of local dead zones. Furthermore, the water suction pipe 11 has multiple water inlets on the side facing the bottom of the inner cavity of the tank 1, and the multiple water inlets are evenly and spaced along the circumference of the tank 1. This allows the cleaning fluid at all points on the bottom of the tank 1 to enter the water suction pipe 11 through the corresponding water inlets, ensuring the complete circulation of the water in the tank. At the same time, the water inlets are opened towards the bottom of the tank 1, which can preferentially suck up heavier substances such as oil and impurities deposited at the bottom of the tank, improving the effect of circulation filtration.

[0044] Understandably, during actual operation, the pneumatic diaphragm pump 2 generates negative pressure upon startup. Cleaning fluid from various locations at the bottom of the tank 1 enters the pumping pipe 11 through evenly distributed inlet holes, and is then collected and transported to the inlet of the pneumatic diaphragm pump 2. This embodiment achieves comprehensive and uniform circulation of the cleaning fluid within the tank 1 through the pumping pipe 11 and multiple inlet holes, further improving the recycling efficiency and overall cleanliness of the cleaning fluid.

[0045] Example 3:

[0046] This embodiment is a preferred implementation based on Embodiment 2, aiming to further refine and optimize the connection structure of the infusion assembly 5. Specifically, as follows... Figure 1 , Figure 2 and Figure 5 As shown, the outlet end of the pumping pipe 11 extends out of the tank 1 and is connected to the first connector 12. The infusion assembly 5 includes an infusion pipe 13 and a first valve 14. The two ends of the infusion pipe 13 are respectively connected to the inlet end of the pneumatic diaphragm pump 2 and the filter 4. The end of the filter 4 away from the pneumatic diaphragm pump 2 is connected to the first valve 14, and one end of the first valve 14 is connected to the first connector 12.

[0047] In this embodiment, since the outlet end of the pumping pipe 11 extends outside the tank 1 and is connected to the first connector 12, the first connector 12 can be any type of connector that facilitates quick connection, such as a quick-connect connector or a threaded connector (preferably a quick-connect connector in this embodiment). This allows for quick connection and disconnection between the pumping pipe 11 inside the tank 1 and the external infusion pipe 13, facilitating the assembly, disassembly, and maintenance of the equipment. Furthermore, the infusion assembly 5 includes an infusion pipe 13 and a first valve 14. Both ends of the infusion pipe 13 are connected to the inlet end of the pneumatic diaphragm pump 2 and the filter 4, respectively. The end of the filter 4 away from the pneumatic diaphragm pump 2 is connected to the first valve 14, and one end of the first valve 14 is connected to the first connector 12. The first valve 14 can be any type of manually controlled valve, such as a ball valve or a stop valve. The first valve 14 can control the opening and closing of the infusion pipe 13. For example, during equipment maintenance, filter 4 replacement, or shutdown maintenance, the connection between the tank 1 and the external pipeline can be cut off by closing the first valve 14 to prevent leakage of the cleaning fluid, thus improving the convenience and safety of equipment maintenance. In addition, in this embodiment, the filter 4 is connected in series between the first valve 14 and the pneumatic diaphragm pump 2, so that it can effectively filter the cleaning fluid before it enters the pneumatic diaphragm pump 2, thereby intercepting impurities, sludge and other solid particles in the cleaning fluid, effectively preventing impurities from entering the pump body and causing wear or blockage, extending the service life of the pneumatic diaphragm pump 2 and ensuring the stable operation of the equipment.

[0048] Example 4:

[0049] This embodiment is a preferred implementation based on Embodiment 1, aiming to further refine and optimize the oil collection component 6. Specifically, as follows... Figure 2 , Figure 3 and Figure 6 As shown, the oil collection assembly 6 also includes a one-way valve 15, a second valve 16, and a second connector 17. The second connector 17 is disposed on the outer wall of the tank 1 and is connected to the hose 9. The second valve 16 is connected to the one-way valve 15 and the second connector 17 respectively, and the end of the one-way valve 15 away from the second valve 16 is detachably connected to the oil tank 10.

[0050] In this embodiment, the oil collection assembly 6 also includes a one-way valve 15, a second valve 16, and a second connector 17. The second connector 17 is located on the outer wall of the tank 1 and communicates with the hose 9. The second connector 17 can be any type of connector, such as a quick-connect fitting or a threaded fitting (a quick-connect fitting is preferred in this embodiment). The second connector 17 enables a quick connection between the hose 9 inside the tank 1 and the external oil collection pipeline, facilitating disassembly and replacement. Furthermore, the second valve 16 is connected to both the one-way valve 15 and the second connector 17. The second valve 16 can be any type of manual valve, such as a ball valve or a gate valve (a ball valve is preferred in this embodiment). The second valve 16 can control the opening and closing of the oil collection pipeline. For example, when the oil tank 10 is disassembled or replaced, or when the equipment is shut down, the pipeline can be cut off by closing the second valve 16 to prevent leakage of cleaning fluid or floating oil. Meanwhile, the end of the one-way valve 15 furthest from the second valve 16 is detachably connected to the oil tank 10. The one-way valve 15 ensures that the oil can only flow from the oil drain 8 to the oil tank 10 in one direction, preventing the oil or gas in the oil tank 10 from flowing back into the tank body 1. This avoids the problem of oil backflow contaminating the cleaning fluid and ensures the unidirectionality and reliability of floating oil collection. In addition, the one-way valve 15 and the oil tank 10 are detachably connected, which can be achieved through threaded connection, quick-connect connection, etc. (threaded connection is preferred in this embodiment), which facilitates the disassembly, cleaning, and replacement of the oil tank 10 and improves maintenance convenience.

[0051] Example 5:

[0052] This embodiment is a preferred implementation based on Embodiment 4, aiming to further refine and optimize the structure of the fuel tank 10. Specifically, as follows... Figure 1 and Figure 3 As shown, a first level gauge 18 is installed on the oil tank 10; a plug is detachably installed on the bottom surface of the oil tank 10.

[0053] In this embodiment, since the oil tank 10 is equipped with a first level gauge 18, the first level gauge 18 can be any type of level measuring device that intuitively displays the level, such as a glass tube level gauge or a magnetic float level gauge (preferably a glass tube level gauge in this embodiment). The first level gauge 18 allows the staff to intuitively observe the amount of floating oil collected in the oil tank 10, thereby timely grasping the oil storage status of the oil tank 10, facilitating early cleaning when the oil tank 10 is about to overflow, avoiding oil leakage caused by the overflow of the oil tank 10, and improving the reliability of equipment operation and the convenience of maintenance. Furthermore, a plug is detachably installed on the bottom surface of the oil tank 10. The plug can be a threaded plug, a quick-connect plug, or other types of sealing plugs (a threaded plug is preferred in this embodiment). The plug is located at the lowest position on the bottom surface of the oil tank 10. When it is necessary to drain the floating oil collected in the oil tank 10, the oil in the oil tank 10 can be drained from the bottom simply by unscrewing the plug. There is no need to remove and pour out the entire oil tank 10. The oil draining operation is more convenient and cleaner, and the risk of oil spillage is reduced.

[0054] Example 6:

[0055] This embodiment is a preferred implementation based on any one of embodiments 1 to 5, aiming to partition the inner cavity of the tank 1 and further refine and optimize the air-drying function. Specifically, as Figure 1 and Figure 2 As shown, it also includes a purging assembly. A partition 19 is provided on the top surface of the tray 7. The partition 19 divides the inner cavity of the tank 1 into a cleaning chamber 20 and a drying chamber 21. A support for installing the jet injector 3 is provided on the top of the cleaning chamber 20. A purging assembly is provided on the top of the drying chamber 21. The purging assembly is used to blow airflow into the workpiece in the drying chamber 21.

[0056] In this embodiment, a partition 19 is provided on the top surface of the tray 7, dividing the inner cavity of the tank 1 into a cleaning chamber 20 and a drying chamber 21. This achieves spatial separation between the cleaning and drying processes. After the workpiece is cleaned of oil stains in the cleaning chamber 20, the worker can directly transfer the workpiece to the drying chamber 21 for drying. This improves work efficiency and avoids oil stains dripping from the workpiece during removal from the workpiece, thus preventing pollution of the work environment. Furthermore, a support for installing the jet injector 3 is provided on the top of the cleaning chamber 20. The support provides a stable mounting base for the jet injector 3, ensuring the stability of the jet injector 3's spray angle and position, and ensuring that the atomized bubble water can be accurately and evenly sprayed onto the workpiece surface, thereby improving the cleaning effect. Meanwhile, a blowing assembly is installed at the top of the drying chamber 21. This assembly blows airflow into the workpieces within the drying chamber 21. The assembly can be connected to a compressed air source in the workshop, using high-pressure airflow to quickly dry the surface of the cleaned workpieces. This removes residual cleaning fluid and floating oil from the workpiece surface, allowing it to dry quickly for subsequent assembly or use, significantly improving overall work efficiency. Furthermore, the blowing assembly also operates pneumatically, requiring no power supply and maintaining the explosion-proof safety characteristics of the entire machine.

[0057] Understandably, in actual operation, after placing the workpiece to be cleaned on the tray 7 inside the cleaning chamber 20, the operator starts the pneumatic diaphragm pump 2, enabling the jet injector 3 to spray micro-nano bubble water to clean the workpiece. After cleaning, the operator can transfer the workpiece to the drying chamber 21 and start the blowing assembly, at which point the high-pressure airflow can quickly dry the surface of the workpiece. Obviously, in this embodiment, the entire cleaning and drying process of the workpiece is completed within the tank 1, eliminating the need for additional drying equipment. This saves equipment space, improves the continuity and efficiency of the operation, and ensures explosion-proof safety in the aviation fuel station environment by using pneumatic drive throughout the process.

[0058] Example 7:

[0059] This embodiment is a preferred implementation based on Embodiment 6, aiming to further refine and optimize the structure of the purging assembly. Specifically, as... Figure 2 and Figure 4 As shown, the purging assembly includes an air blowing pipe 22 and an air supply pipe 23. The air supply pipe 23 is connected to the air blowing pipe 22 and the workshop air source, respectively. The air blowing pipe 22 extends circumferentially along the drying chamber 21, and the air blowing pipe 22 is provided with multiple through holes evenly and at intervals along its extension direction. All the through holes are set facing the center of the drying chamber 21.

[0060] In this embodiment, the purging assembly includes an air blowing pipe 22 and an air supply pipe 23. The air supply pipe 23 is connected to both the air blowing pipe 22 and the workshop air source. As an air source delivery pipeline, the air supply pipe 23 delivers high-pressure air from the workshop compressed air source to the air blowing pipe 22, resulting in a simple structure and convenient connection. Furthermore, the air blowing pipe 22 extends circumferentially along the drying chamber 21, and multiple through holes are evenly and spaced along its extension direction. These through holes are all positioned facing the center of the drying chamber 21, allowing high-pressure air to be simultaneously sprayed from all circumferential directions of the drying chamber 21 towards the center, forming a surrounding airflow field. This ensures that the workpiece within the drying chamber 21 is thoroughly and completely purged, guaranteeing that all surfaces of the workpiece are fully covered by the airflow. This allows the workpiece to reach a dry state in a short time, with uniform and thorough drying, avoiding the problems of uneven drying and localized residue caused by unilateral air blowing.

[0061] Example 8:

[0062] This embodiment is a preferred implementation based on any one of embodiments 1 to 5, aiming to further refine and optimize the liquid level monitoring function of tank 1. Specifically, as Figures 1 to 3 As shown, a second level gauge 24, which communicates with the inner cavity of the tank 1, is installed on the outer wall of the tank 1.

[0063] In this embodiment, a second level gauge 24 communicating with the inner cavity of the tank 1 is installed on the outer wall of the tank 1. The second level gauge 24 can be any type of level measuring device that intuitively displays the liquid level, such as a glass tube level gauge or a magnetic float level gauge (preferably a glass tube level gauge in this embodiment). The second level gauge 24 allows the staff to intuitively and in real-time observe the water level of the cleaning fluid in the tank 1, thus facilitating timely monitoring of the water volume in the tank. When the water level in the tank is too low, the cleaning fluid can be replenished in time to prevent the pneumatic diaphragm pump 2 from running dry and being damaged. When the water level is too high, water replenishment can be stopped to prevent the cleaning fluid from overflowing the tank 1. In addition, the second level gauge 24 adopts a purely mechanical structure, requires no power supply, and will not generate electrical sparks, fully meeting the explosion-proof safety requirements of aviation fuel stations.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An explosion-proof oil cleaning device, characterized in that, The system includes a tank (1), a pneumatic diaphragm pump (2), an ejector (3), a filter (4), a liquid delivery assembly (5), and an oil collection assembly (6). The tank (1) is equipped with a tray (7) for placing workpieces, and the tray (7) has multiple through holes. The pneumatic diaphragm pump (2) is connected to the workshop air source on one side of the tank (1). The water inlet of the pneumatic diaphragm pump (2) is connected to the bottom of the inner cavity of the tank (1) through the filter (4) and the liquid delivery assembly (5) so that the pneumatic diaphragm pump (2) can draw the cleaning liquid in the tank (1). The water outlet of the pneumatic diaphragm pump (2) is connected to the ejector (3). The ejector (3) is used to convert the cleaning liquid output by the pneumatic diaphragm pump (2) into atomized bubble water and spray it onto the surface of the workpiece in the tank (1) to rinse off the oil stains. The oil collection assembly (6) includes an oil drain bucket (8), a hose (9) and an oil tank (10). The oil drain bucket (8) floats on the surface of the cleaning fluid in the tank (1). The hose (9) is connected to the oil drain bucket (8) and the oil tank (10) respectively. The oil drain bucket (8) is used to collect the floating oil on the surface of the cleaning fluid and transport the floating oil to the oil tank (10) through the hose (9).

2. The explosion-proof oil cleaning equipment according to claim 1, characterized in that, The infusion assembly (5) also includes a water pump (11), which is located at the bottom of the inner cavity of the tank (1) and connected to the water inlet of the pneumatic diaphragm pump (2). The water pump (11) extends circumferentially along the tank (1), and multiple water inlets are provided on the side of the water pump (1) facing the bottom surface of the inner cavity of the tank (1). The multiple water inlets are evenly and spaced along the circumference of the tank (1).

3. The explosion-proof oil cleaning equipment according to claim 2, characterized in that, The outlet end of the pumping pipe (11) extends out of the tank (1) and is connected to the first connector (12). The infusion assembly (5) includes an infusion pipe (13) and a first valve (14). The two ends of the infusion pipe (13) are respectively connected to the inlet end of the pneumatic diaphragm pump (2) and the filter (4). The end of the filter (4) away from the pneumatic diaphragm pump (2) is connected to the first valve (14), and one end of the first valve (14) is connected to the first connector (12).

4. The explosion-proof oil cleaning equipment according to claim 1, characterized in that, The oil collection assembly (6) also includes a one-way valve (15), a second valve (16), and a second connector (17). The second connector (17) is disposed on the outer wall of the tank (1) and communicates with the hose (9). One end of the second valve (16) is communicated with the second connector (17), and the other end is communicated with the one-way valve (15). The end of the one-way valve (15) away from the second valve (16) is detachably connected to the oil tank (10).

5. The explosion-proof oil cleaning equipment according to claim 4, characterized in that, A first level gauge (18) is provided on the oil tank (10); a plug is detachably installed on the bottom surface of the oil tank (10).

6. An explosion-proof oil cleaning device according to any one of claims 1-5, characterized in that, It also includes a purging assembly. A partition (19) is provided on the top surface of the tray (7). The partition (19) divides the inner cavity of the tank (1) into a cleaning chamber (20) and a drying chamber (21). A support for installing the jet injector (3) is provided on the top of the cleaning chamber (20). The purging assembly is provided on the top of the drying chamber (21). The purging assembly is used to blow airflow into the workpiece in the drying chamber (21).

7. The explosion-proof oil cleaning equipment according to claim 6, characterized in that, The purging assembly includes an air blowing pipe (22) and an air supply pipe (23). The air supply pipe (23) is connected to the air blowing pipe (22) and the workshop air source, respectively. The air blowing pipe (22) extends circumferentially along the drying chamber (21), and the air blowing pipe (22) is provided with multiple through holes evenly and at intervals along its extension direction. All the through holes are set facing the center of the drying chamber (21).

8. An explosion-proof oil cleaning device according to any one of claims 1-5, characterized in that, A second level gauge (24) is provided on the outer wall of the tank (1) and communicates with the inner cavity of the tank (1).

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