Oil leakage detection and recovery device and recovery method

Abstract

The application discloses an oil leakage detection and recovery device and a recovery method. The oil leakage detection and recovery device comprises a branch recovery system and a main recovery system. The branch recovery system comprises a collector, a collection tank, a first liquid level meter, an overflow pipeline and an overflow valve. The collector is used for collecting oil leakage of a working machine. The collector is placed in the collection tank. The first liquid level meter is arranged in the collection tank and is used for detecting the oil level. The overflow pipeline is communicated with the collection tank. The overflow valve is arranged in the overflow pipeline and is used for controlling the opening and closing of the overflow pipeline. The main recovery system is communicated with the overflow pipeline. The main recovery system is used for filtering and recovering the oil flowing out of the collection tank. According to the application, the independent branch recovery system is configured for each program control valve. The collector is used for accurately collecting the oil leakage. The collection tank is used for temporarily storing the oil leakage. The first liquid level meter is used for detecting the oil level in real time. Therefore, the quantitative monitoring of the oil leakage of each program control valve can be realized.

Description

Technical Field

[0001] This application belongs to the technical field of oil leak detection and recovery devices, and particularly relates to an oil leak detection and recovery device. Background Technology

[0002] Pressure swing adsorption (PSA) oxygen generators are core equipment for oxygen enrichment in modern industrial blast furnaces. Their operational stability directly affects the reliability and efficiency of the entire oxygen supply system, and the proper functioning of the internal programmable valves is crucial for ensuring stable operation. Because PSA oxygen generators have numerous programmable valves with extremely high operating frequencies—1-2 million times per year—and each valve's full stroke time is only 0.5-1 second, this frequent opening and closing can lead to rapid wear of the valve gear cylinder seals, resulting in hydraulic oil leakage. This leakage problem is widespread in the industry. Failure to address this leakage promptly and effectively not only wastes a significant amount of hydraulic oil, increasing maintenance costs, but also causes the leaked oil to drip and evaporate onto equipment components, causing corrosion, affecting equipment lifespan, and potentially leading to equipment failure. Furthermore, oil leaks can pollute the surrounding environment, posing safety hazards.

[0003] Currently, the industry commonly uses the "oil collection pan method" to handle oil leaks. This involves placing an oil collection pan under each programmable valve to temporarily collect leaked hydraulic oil. After the unit is shut down, maintenance personnel manually clean up the collected oil. While this method can alleviate the problem of oil leakage to some extent, it is essentially a passive response measure with several inherent drawbacks: First, the oil collection pan has a limited collection range and lacks a precise receiving structure, making it prone to oil spillage and unable to achieve comprehensive oil collection. Second, there is no real-time detection method, so maintenance personnel cannot monitor the oil leakage situation in real time and can only understand the oil accumulation status through periodic inspections, making it difficult to detect leaks with severely worn seals in the early stages, which can easily lead to the exacerbation of the leakage problem. Third, the collected oil needs to be manually cleaned and transported, which is inefficient and can easily cause secondary oil spillage, further polluting the environment. Fourth, the collected oil cannot be recycled and reused in most cases due to the lack of effective filtration and purification treatment, and can only be directly discarded, resulting in serious oil waste and failing to meet the industry's requirements for energy conservation and environmental protection. Fifth, the existing oil collection pan lacks an integrated overflow and transfer structure, which can easily cause overflow when too much oil accumulates, further expanding the pollution range.

[0004] In view of the shortcomings of the existing technology, there is an urgent need for an oil leak detection and recovery device that can realize real-time oil leak detection, comprehensive collection, closed transfer and recycling, so as to solve the many deficiencies of the existing "oil tray collection method", ensure the stable operation of pressure swing adsorption oxygen generator, reduce operation and maintenance costs and reduce environmental pollution. Summary of the Invention

[0005] This application aims to at least partially solve the technical problems of existing "oil pan collection methods," which are characterized by passive response, inability to monitor in real time, and susceptibility to pollution and oil waste. To this end, this application provides an oil leak detection and recovery device and method.

[0006] In a first aspect, this application provides an oil leak detection and recovery device, comprising: a sub-machine recovery system and a main machine recovery system. The sub-machine recovery system includes a collector, a collection tank, a first level gauge, an overflow pipe, and an overflow valve. The collector is used to collect oil leaks from the working machine and is placed in the collection tank. The first level gauge is installed in the collection tank to detect the oil level. The overflow pipe is connected to the collection tank, and the overflow valve is installed in the overflow pipe to control the opening and closing of the overflow pipe. The main machine recovery system is connected to the overflow pipe and is used to filter and recover the oil flowing out of the collection tank.

[0007] Optionally, the collector's collection chamber is conical, the collector is made of a light-transmitting material, and the surface is marked with graduations.

[0008] Optionally, the overflow valve is a solenoid valve, which is electrically connected to the first level gauge, which is used to control the opening and closing of the solenoid valve.

[0009] Optionally, the recycling system also includes a guide pipe and a control valve, with one end of the guide pipe facing the collector and the other end for communication with the working machine, and the control valve is located on the guide pipe.

[0010] Optionally, the main unit recovery system includes a recovery oil tank, a second level gauge, a filter, an oil pump, a delivery pipe, and a power oil tank. The recovery oil tank is connected to an overflow pipe. The second level gauge is installed in the recovery oil tank. The delivery pipe is connected to both the recovery oil tank and the power oil tank. The oil pump and filter are installed in the delivery pipe. The oil pump is used to pressurize the delivery pipe, and the filter is used to filter the oil.

[0011] Optionally, the main unit recovery system includes an outlet valve and an inlet valve, which are installed in the delivery pipe and located on both sides of the oil pump. The outlet valve corresponds to the recovery oil tank, and the inlet valve corresponds to the power oil tank.

[0012] Optionally, the outlet valve and the inlet valve are solenoid valves, and the outlet valve and the inlet valve are electrically connected to the second level gauge, which is used to control the opening and closing of the outlet valve and the inlet valve.

[0013] Optionally, the filter includes a coarse filter and a fine filter, which are installed in the delivery pipe and located on both sides of the oil pump. The coarse filter corresponds to the recovery oil tank, and the fine filter corresponds to the power oil tank. The filter pore size of the fine filter is smaller than that of the coarse filter.

[0014] Secondly, this application provides a recycling method, which includes: The collector gathers leaked oil from the working machine; The oil collection tank catches the oil that overflows from the collector; The first level gauge detects the oil level in the collection tank, and once the preset value is reached, the overflow valve opens, and the oil enters the main unit recovery system through the overflow pipeline.

[0015] Optionally, the step of the oil entering the main unit recovery system through the overflow line includes: The recovery tank collects oil from the overflow pipe; The second level gauge detects the oil level in the recovery tank; After the second level gauge reaches the preset value, the oil pump starts, and the oil enters the power oil tank through the delivery pipe and is filtered by the filter.

[0016] The beneficial effects of this application are: By configuring an independent sub-system for each programmable valve, the collector accurately catches the leaking oil, and the collection tank provides temporary storage for the leaking oil. Combined with the first level gauge to detect the oil level in real time, it is possible to achieve real-time, visual, and quantitative monitoring of the oil leakage of each programmable valve. Maintenance personnel can use the level data to judge the degree of leakage in a timely manner, which is convenient for early detection of leaks with severe wear of seals, and early maintenance and replacement to prevent the leakage problem from worsening.

[0017] Secondly, a fully enclosed oil recovery path is constructed through the overflow pipeline and the main unit recovery system. When the oil level in the collected tank reaches a safe level, the first level gauge triggers the overflow valve to open, and the oil flows into the main unit recovery system through the overflow pipeline. There is no oil exposure throughout the process, completely eliminating the corrosion of the pressure swing adsorption (PSA) oxygen generator components by leaked oil drips and evaporation, as well as pollution to the surrounding environment, thus avoiding equipment failures and safety accidents caused by oil leaks. Finally, the main unit recovery system filters and purifies the recovered oil, achieving oil recycling and reuse, effectively reducing oil waste. Compared to the current technology where most oil is directly discarded, this reduces operation and maintenance costs and meets the industry's energy-saving and environmental protection requirements, comprehensively improving the reliability and operating efficiency of the PSA oxygen generator's oxygen supply system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the structure of the oil leak detection and recovery device provided in this application; Figure 2 This is a flowchart illustrating the recycling method provided in this application; Figure 3 This is a flowchart illustrating the recycling method provided in this application; Figure label: 5 Collector; 3 Collection tank; 6 First level gauge; 7 Overflow line; 8 Overflow valve; 4 Guide pipe; 5 Control valve; 9. Recovery oil tank; 10. Second level gauge; 13. Oil pump; 14. Delivery pipe; 17. Power oil tank; 12. Outlet valve; 16. Inlet valve; 11. Coarse filter; 15. Fine filter. Detailed Implementation

[0020] The technical solutions of this utility model application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described application is only a part of this utility model application, not all of it. Based on the application in this utility model, all other applications obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that all directional indications in this utility model application are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, technical solutions from different applications can be combined, but only on the basis of being achievable by a person skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, such a combination should be considered nonexistent and not within the scope of protection claimed by this utility model. This application is described below with reference to the accompanying drawings and specific applications: Please see Figure 1 , Figure 1 This is a schematic diagram of the oil leak detection and recovery device provided in this application.

[0024] The oil leak detection and recovery device includes a sub-unit recovery system and a central unit recovery system, which work together to achieve real-time detection and full-process recovery of oil leaks. The sub-unit recovery system is configured for each programmable valve, including a collector 5, a collection tank 3, a first level gauge 6, an overflow pipe 7, and an overflow valve 8. The collector 5 adopts a groove-type structure adapted to the size of the leak point on the programmable valve, specifically designed to collect hydraulic oil leaked from the programmable valve due to wear of the gear cylinder seals. To ensure comprehensive collection, the collector 5 is fixedly placed inside the collection tank 3, with its opening directly below the leak point on the programmable valve. The first level gauge 6 can be an immersion-type level sensor, vertically installed at the bottom inner side of the collection tank 3. Its detection probe extends to the lowest level of the collection tank 3, enabling real-time detection of the oil level in the collection tank 3 and transmitting the level data to the operation and maintenance monitoring terminal for quantitative monitoring of oil leaks.

[0025] One end of the overflow pipe 7 is connected to the upper side of the collection tank 3, with the connection point above the safety level line of the collection tank 3. The other end is connected to the main unit recovery system. The overflow valve 8 can be an electromagnetic control valve 5, connected in series on the overflow pipe 7, and controlled by the detection data of the first level gauge 6 to control the opening and closing of the overflow pipe 7. Of course, the overflow valve 8 can also be manually controlled to open and close. The main unit recovery system adopts a closed oil storage tank structure, and its oil inlet is connected to the overflow pipe 7 of each sub-unit recovery system. It can be equipped with a filter and purification component to filter and settle the oil overflowing from the collection tank 3, realizing the recovery and reuse of the oil.

[0026] The oil leak detection and recovery device in this embodiment can effectively solve the technical problems of the existing "oil tray collection method" which is passive, unable to monitor in real time, and prone to pollution and oil waste. The specific technical effects are as follows: First, by configuring an independent recovery system for each programmable valve, the collector 5 accurately collects the leaking oil, and the collection tank 3 realizes the temporary storage of the leaking oil. With the first level gauge 6 detecting the oil level in real time, it can realize real-time, visual and quantitative monitoring of the oil leakage of each programmable valve. The operation and maintenance personnel can judge the degree of oil leakage in time through the level data, which is convenient for early detection of leaks with severe wear of seals, and early maintenance and replacement to avoid the leakage problem from aggravating.

[0027] Secondly, a fully enclosed oil recovery path is constructed through the overflow pipe 7 and the main unit recovery system. When the oil level in the collected oil tank 3 reaches the safe level, the first level gauge 6 triggers the overflow valve 8 to open, and the oil flows into the main unit recovery system through the overflow pipe 7. There is no oil exposure throughout the process, completely eliminating the corrosion of the pressure swing adsorption (PSA) oxygen generator components by leaked oil drips and evaporation, as well as pollution to the surrounding environment, thus avoiding equipment failures and safety accidents caused by oil leaks. Finally, the main unit recovery system filters and purifies the recovered oil, achieving oil recycling and reuse, effectively reducing oil waste. Compared to the current technology where most oil is directly discarded, this reduces operation and maintenance costs and meets the industry's energy-saving and environmental protection requirements, comprehensively improving the reliability and operating efficiency of the PSA oxygen generator's oxygen supply system.

[0028] Specifically, the overflow valve 8 is an electromagnetic valve, which is electrically connected to the first level gauge 6 to form a linkage control mechanism. In conjunction with the overall structure of the device, the first level gauge 6 is installed inside the collection tank 3 to detect the level of leaking oil in the collection tank 3 in real time. The detected level data is converted into an electrical signal and transmitted to the electrically connected electromagnetic overflow valve 8. When the first level gauge 6 detects that the oil level in the collection tank 3 reaches the preset safe level, it sends a conduction signal to the overflow valve 8, controlling the electromagnetic valve to open, allowing the oil in the collection tank 3 to flow into the main unit's recovery system through the overflow pipe 7. When the first level gauge 6 detects that the oil level is below the preset safe level, it sends a disconnection signal, controlling the electromagnetic valve to close, stopping the oil overflow and achieving temporary oil storage.

[0029] Meanwhile, the first level gauge 6 transmits the level data to the operation and maintenance monitoring terminal, and works with the collector 5, the collection tank 3, the overflow pipeline 7 and the main unit recovery system to complete the entire process of collecting, detecting and recovering leaked oil. The collector 5 receives the hydraulic oil leaking from the programmable valve and guides it into the collection tank 3. The main unit recovery system filters and recovers the overflowing oil to ensure the continuity and reliability of the overall operation of the device.

[0030] The collector 5 of this oil leak detection and recovery device is the core component for oil leakage collection. Its collection chamber is designed with a conical structure, with the larger end facing upwards and the smaller end downwards. This design is adapted to the oil leak point settings of programmable valves, enabling rapid collection of leaking hydraulic oil and preventing oil residue on the inner wall of the collection chamber, ensuring comprehensive oil leakage collection. Simultaneously, the collector 5 is made of a translucent material, preferably high-transparency acrylic. This material not only has excellent oil resistance but also allows maintenance personnel to visually observe the oil accumulation within the collection chamber without disassembling the collector 5. Furthermore, the outer surface of the collector 5 is uniformly marked with graduations in milliliters, increasing sequentially from the smaller end to the larger end of the conical collection chamber. These graduations precisely correspond to the volume of the collection chamber. Combined with the oil-gathering properties of the conical structure and the visibility of the translucent material, maintenance personnel can quickly read the real-time oil leakage volume through the graduations and then conveniently calculate the oil leakage rate by analyzing the difference in leakage volume at different time points, achieving rapid quantitative judgment of the oil leakage situation. Collector 5 is placed inside the oil collection tank 3. The opening of its conical collection chamber is directly opposite the oil leakage point of the programmable valve. The collected oil leakage can flow naturally into the oil collection tank 3. Together with the first level gauge 6, the electromagnetic overflow valve 8 and the main unit recovery system, the entire process of oil leakage collection, detection and recovery is completed, ensuring the continuity of the device operation.

[0031] In addition to the original collector 5, collection tank 3, first level gauge 6, overflow pipe 7, and overflow valve 8, the oil leakage detection and recovery device's sub-system also includes a guide pipe 4 and a control valve 5. These two components work together to control oil leakage during maintenance. The guide pipe 4 is made of oil-resistant and corrosion-resistant metal. One end faces the conical collection chamber opening of the collector 5, with its port directly below the oil leakage point of the programmable valve. The other end connects to the working machine (i.e., the hydraulic circuit of the programmable valve of the pressure swing adsorption oxygen generator unit), precisely guiding the leaking hydraulic oil from the programmable valve into the collector 5, preventing oil from spilling outside the collector 5. The control valve 5 is connected in series on the guide pipe 4. It is a manual shut-off valve with a simple structure and convenient operation. Its core function is to manually close the control valve 5 to cut off the oil circuit of the guide pipe 4 when repairing the oil leak point (i.e., repairing the worn part of the programmable valve seal). This prevents the hydraulic oil in the working machine from continuing to leak into the collector 5 and the collection oil tank 3 during the repair process, avoids oil overflow or contamination of the repair area during the repair process, and also facilitates the work of the maintenance personnel.

[0032] The core of the main unit recovery system of this oil leakage detection and recovery device is used to recover the oil overflowing from the branch unit recovery system. Specifically, it includes a recovery oil tank 9, a second level gauge 10, a filter, an oil pump 13, a delivery pipe 14, and a power oil tank 17. The recovery oil tank 9 serves as a transfer component for centralized oil recovery. Its inlet is connected to the overflow pipe 7 of the branch unit recovery system, stably receiving leaked oil flowing from the branch unit collection tank 3 through the overflow pipe 7, achieving centralized oil collection. The second level gauge 10 is fixedly installed inside the recovery oil tank 9 to detect the oil level in real time, accurately reflecting the oil accumulation and providing signal support for subsequent oil delivery. The delivery pipe 14 serves as the delivery channel for oil recovery and reuse. Its two ends are sealed and connected to the oil outlet of the recovery oil tank 9 and the oil inlet of the power oil tank 17, respectively, ensuring leak-free oil delivery. Both the oil pump 13 and the filter are installed in series on the delivery pipe 14. They work together to purify and transport the oil. The oil pump 13 provides pressurization power to the oil in the delivery pipe 14, driving the oil to flow directionally from the recovery tank 9 to the power tank 17, ensuring the stability and efficiency of the oil transport. The filter is used to filter the oil during the transport process, effectively intercepting impurities, metal fragments, and other contaminants mixed in the oil, preventing contaminated oil from entering the power tank 17.

[0033] By connecting the recovery oil tank 9 to the overflow pipe 7 of the branch unit, centralized recovery of leaked oil is achieved, solving the problems of scattered oil collection and difficulty in unified treatment in existing recovery methods, and avoiding environmental pollution and oil waste caused by oil spills. The second level gauge 10 can monitor the oil level in the recovery oil tank 9 in real time, allowing maintenance personnel to keep track of oil accumulation and prevent the tank from overflowing. It also provides accurate data for starting and stopping the oil pump 13, improving the intelligence of system operation. Furthermore, the delivery pipe 14 connects the recovery oil tank 9 to the power oil tank 17. With the pressurization power provided by the oil pump 13, it replaces the traditional manual oil transfer method, effectively solving the problems of high labor intensity, low efficiency, and easy secondary oil spillage caused by manual transfer, and significantly improving the efficiency and safety of oil recovery. Finally, the filter effectively filters impurities and contaminants in the oil, solving the technical problem of insufficient purity of the recovered oil and its inability to be directly reused. The purified oil can be directly transported to the power oil tank 17 to realize the recycling of oil, reduce oil waste, lower maintenance costs, and at the same time avoid the contaminated oil from causing wear on the working machine, ensuring the stable operation of the equipment and truly realizing the resource utilization and high efficiency of oil leakage recovery.

[0034] The main unit recovery system of this oil leakage detection and recovery device is equipped with an outlet valve 12 and an inlet valve 16, both installed in the delivery pipe 14 and located on opposite sides of the oil pump 13. The outlet valve 12 is positioned near the outlet of the recovery oil tank 9, while the inlet valve 16 is positioned near the inlet of the power oil tank 17. Furthermore, both the outlet valve 12 and the inlet valve 16 are electromagnetic valves, and both are electrically connected to the second level gauge 10 in the main unit recovery system, forming a linkage control mechanism. The second level gauge 10 detects the oil level in the recovery oil tank 9 in real time, converts the detected level data into an electrical signal, and then precisely controls the opening and closing of the outlet valve 12 and the inlet valve 16, achieving automated valve control during oil delivery. The conveying pipe 14 connects the recovery oil tank 9 and the power oil tank 17. The oil pump 13 and the filter are installed in series on the conveying pipe 14. The recovery oil tank 9 is used to receive the overflow oil from the sub-unit recovery system. The second level gauge 10 is installed in the recovery oil tank 9. The power oil tank 17 is used to receive the purified oil conveyed through the conveying pipe 14. All components work together to ensure the stable implementation of the new technology solution.

[0035] By arranging the outlet valve 12 and inlet valve 16 within the delivery pipe 14 and on either side of the oil pump 13, with outlet valve 12 corresponding to the recovery oil tank 9 and inlet valve 16 corresponding to the power oil tank 17, the problem of unreasonable valve layout and inability to accurately control oil flow direction in existing oil delivery processes is effectively solved. This achieves zoned control of oil delivery on both sides of the oil pump 13, avoiding turbulence during oil delivery and providing structural assurance for directional oil flow. Furthermore, outlet valve 12 and inlet valve 16 are electromagnetic valves and are electrically connected to the second level gauge 10, which controls their opening and closing. This effectively solves the technical problems of traditional valves requiring manual operation, having low control accuracy, and being unable to adjust in real time according to the oil level. The second level gauge 10 monitors the oil level in the recovery tank 9 in real time. When the level reaches the preset value, it controls the outlet valve 12 and the inlet valve 16 to open synchronously, working with the oil pump 13 to achieve stable oil delivery from the recovery tank 9 to the power tank 17. When the level is lower than the preset value, it controls both valves to close synchronously to prevent oil in the power tank 17 from flowing back into the recovery tank 9, and to avoid damage caused by the oil pump 13 running dry. This improves the automation level of oil delivery and ensures the stability and safety of oil recovery delivery. It solves the defect of valve control and level detection being disconnected in the existing technology, further improves the control logic of the main unit recovery system, and enhances the intelligence level of oil leakage recovery.

[0036] In the overall oil leakage detection and recovery system, the filter comprises two components: a coarse filter 11 and a fine filter 15. Both are connected in series in the delivery pipe 14 and located on opposite sides of the oil pump 13. The coarse filter 11 is positioned on the side corresponding to the recovery oil tank 9, near its outlet, while the fine filter 15 is positioned on the side corresponding to the power oil tank 17, near its inlet. The key difference is that the pore size of the fine filter 15 is smaller than that of the coarse filter 11, forming a tiered filtration structure. The conveying pipe 14 connects the recovery oil tank 9 and the power oil tank 17. The oil pump 13 is used to provide pressurization power for oil transportation. The recovery oil tank 9 is used to receive the oil overflowing from the sub-unit recovery system. The power oil tank 17 is used to receive the purified oil after graded filtration. The coarse filter 11 first performs preliminary filtration on the recovered oil, and the fine filter 15 then performs deep filtration on the oil after preliminary filtration. The two work together to complete the graded purification of the oil, ensuring the stable implementation of the new technology solution. At the same time, it works in conjunction with the linkage control of the original outlet valve 12, inlet valve 16 and second level gauge 10 of the main unit recovery system to realize the integrated operation of oil recovery, filtration and transportation.

[0037] By setting the filters as a coarse filter 11 and a fine filter 15, respectively located on both sides of the oil pump 13 and corresponding to the recovery oil tank 9 and the power oil tank 17, the technical problems of unreasonable layout, excessive filtration load, and easy clogging of existing single filters are effectively solved. The coarse filter 11 is close to the recovery oil tank 9, which can first intercept larger impurities in the oil (such as metal shavings and dust particles) to reduce the subsequent filtration pressure. The fine filter 15 is close to the power oil tank 17, which can deeply purify the oil after preliminary filtration, realizing graded filtration, clear division of labor, and improving the overall filtration efficiency and filtration stability.

[0038] Furthermore, the pore size of the fine filter 15 is smaller than that of the coarse filter 11, forming a "coarse-to-fine" graded filtration structure. This effectively solves the technical defects of existing single filters, which either have low filtration accuracy and cannot remove fine impurities, or have pore sizes that are too small, easily clogged, and affect oil delivery efficiency. The coarse filter 11 initially filters large particulate impurities, preventing them from entering the oil pump 13 and causing wear, while also preventing clogging of the fine filter 15. The fine filter 15 then removes fine impurities from the oil, ensuring that the purity of the purified oil meets the usage standards of the power oil tank 17, preventing contaminated oil from entering the working machine (pressure swing adsorption oxygen generator unit's programmable valves), reducing equipment wear, and extending equipment lifespan. In addition, the graded filtration structure can also extend the overall service life of the filters, reduce the frequency of filter replacement and maintenance costs, and, combined with the automated control of oil delivery, further improve the function of the main unit recovery system, realizing the resource utilization and high efficiency of leaked oil recovery, and ensuring that the recovered oil can be safely reused.

[0039] Please see Figure 1 and Figure 2 , Figure 2 This is a flowchart illustrating the recycling method provided in this application.

[0040] Recycling methods include: S101: Collector 5 collects leaked oil from the working machine; S102: The oil collection tank 3 receives the oil overflowing from the collector 5; S103: The first level gauge 6 detects the oil level in the collection tank 3, and after reaching the preset value, the overflow valve 8 opens, and the oil enters the main unit recovery system through the overflow pipe 7.

[0041] This oil leak detection and recovery method comprises three core steps, which are interconnected and work in synergy to achieve the orderly collection and transfer of leaked oil. Step 1 is oil collection. Collector 5 is set up at the oil leak point of the working machine (the programmable valve of the pressure swing adsorption oxygen generator unit) to accurately collect the hydraulic oil leaking from the working machine, ensuring that all leaked oil is collected and preventing oil from spilling onto the equipment surface or the surrounding environment. Step 2 is oil transfer. The oil collected by collector 5 gradually accumulates. When the oil reaches the upper limit of collector 5, the oil naturally overflows and flows into the collection tank 3 below. Collection tank 3 serves as a temporary transfer component for the oil, achieving centralized storage of leaked oil and preventing direct leakage. Step 3 is the oil transfer. The first level gauge 6 is fixedly installed inside the oil collection tank 3 to detect the oil level in the oil collection tank 3 in real time. The first level gauge 6 is preset with a safe oil level value. When the detected oil level reaches the preset value, the first level gauge 6 triggers the overflow valve 8 to open. At this time, the oil stored in the oil collection tank 3 flows into the main unit recovery system through the overflow pipe 7, completing the transfer of leaked oil from the branch unit recovery system to the main unit recovery system. After the oil level is lower than the preset value, the overflow valve 8 closes, and the oil collection tank 3 continues to receive the oil overflowing from the collector 5, and the cycle is repeated to achieve continuous recovery.

[0042] The technical solution of the oil leak detection and recovery method in this embodiment can specifically solve the technical problems of the existing "oil pan collection method" which is passive collection, lacks an orderly recovery process, is prone to oil spillage, and cannot achieve automated transfer. The specific technical effects are as follows: First, by collecting the oil leak from the working machine in step 1, the technical problems of the limited collection range and easy oil spillage of the existing oil pan are solved, and the oil leak is accurately collected, reducing oil waste and environmental pollution. In step 2, the oil tank 3 receives the oil overflowing from the collector 5, which creates a temporary transfer link for the oil leak. This solves the problems of the existing collection method having no transfer storage and easy oil overflow, and realizes the centralized storage of the oil leak, providing a guarantee for subsequent transfer. Secondly, in step 3, the first level gauge 6 detects the oil level and controls the overflow valve 8 to open after reaching the preset value, realizing automated control of oil transfer. This solves the technical defects of existing technologies that require manual inspection and transfer of oil, resulting in low efficiency and easy oil overflow due to negligence. Through the linkage between level detection and valve opening and closing, it ensures that the oil in the collection tank 3 is always within a safe level range, avoiding oil overflow that could cause equipment corrosion, environmental pollution, or even safety accidents. At the same time, it realizes the orderly transfer of leaked oil from the branch unit to the main unit, laying the foundation for subsequent oil recovery and reuse. In addition, the entire recovery method has clear steps and a coherent process, requiring no complex manual operation, reducing the workload of maintenance personnel, improving the efficiency and reliability of oil leakage recovery, and effectively solving the core problems of passive and chaotic existing oil leakage recovery methods, realizing the orderly and automated collection and transfer of leaked oil.

[0043] Please see Figure 1 and Figure 3 , Figure 3 This is a flowchart illustrating the recycling method provided in this application.

[0044] The step of the oil entering the main unit recovery system through the overflow pipe 7 includes: S201: The oil recovery tank 9 receives oil from the overflow pipe; S202: The second level gauge 10 detects the oil level in the recovery tank 9; S203: After the second level gauge 10 reaches the preset value, the oil pump 13 starts, and the oil enters the power oil tank 17 through the delivery pipe 14 under the filtration of the filter.

[0045] When the first level gauge 6 of the sub-unit recovery system detects that the oil level in the collection tank 3 has reached the preset value, the overflow valve 8 opens, and the oil in the collection tank 3 enters the main unit recovery system through the overflow pipe 7. This entry process includes three consecutive sub-steps, each working together to complete the reception, detection, and transportation of oil within the main unit recovery system. S201: The recovery tank 9, as the core receiving component of the main unit recovery system, has its inlet precisely connected to the outlet of the overflow pipe 7, enabling it to stably receive the oil transported from the overflow pipe 7, achieving centralized collection of oil within the main unit recovery system and preventing oil spillage at the main unit end. S202: The second level gauge 10 is fixedly installed inside the recovery tank 9, detecting the oil level in the recovery tank 9 in real time and providing real-time feedback on the oil accumulation in the tank. This provides accurate signal support for initiating subsequent oil transportation actions, ensuring the appropriate timing of oil transportation. S203: The second level gauge 10 is preset with a preset level value for starting oil delivery. When the second level gauge 10 detects that the oil level in the recovery tank 9 reaches the preset value, it immediately triggers the oil pump 13 to start. The oil pump 13 provides stable pressurization power for oil delivery, driving the oil in the recovery tank 9 into the delivery pipe 14. During the flow of the oil in the delivery pipe 14, it is filtered by the filter to effectively remove impurities, metal fragments and other contaminants mixed in the oil. The filtered clean oil finally flows into the power oil tank 17, completing the entire process of oil processing after entering the main unit recovery system.

[0046] The S201 recovery tank 9 precisely receives the oil transported by the overflow pipe 7, solving the technical problems of existing main unit recovery systems lacking dedicated receiving components, leading to oil spillage around the main unit, causing environmental pollution and oil waste. This achieves centralized oil collection at the main unit end, laying the foundation for subsequent testing and transportation. Secondly, the S202 second level gauge 10 monitors the oil level in the recovery tank 9 in real time, addressing the technical shortcomings of existing technologies where the main unit end oil level cannot be monitored in real time, making it difficult to determine oil accumulation and easily leading to oil overflow. This provides a precise signal for starting the oil pump 13, avoiding energy waste caused by blindly starting the oil pump 13 or damage caused by insufficient oil leading to idling. Finally, after the second level gauge 10 in S203 reaches the preset value, it triggers the oil pump 13 to start. After filtering the oil with the filter, the oil is sent to the power oil tank 17. This effectively solves the technical problems of the existing oil entering the main unit without power delivery, requiring manual transfer and resulting in low efficiency, as well as the inability to reuse the recovered oil due to impurities. The filter removes contaminants from the oil, ensuring that the oil meets the usage standards of the power oil tank 17, realizing oil recycling and reuse, reducing oil waste and maintenance costs. The automated start of the oil pump 13 replaces manual operation, reducing the labor intensity of maintenance personnel. The three sub-steps form a complete oil processing flow at the main unit, solving the core problems of the existing main unit recycling process being messy and inaccurate in control, and improving the automation, standardization and resource utilization level of oil recycling.

[0047] In the description of this specification, the references to terms such as "an application," "some applications," "example," "specific example," or "some examples," etc., mean that a specific feature, structure, material, or characteristic described in connection with that application or example is included in at least one application or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same application or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more applications or examples. Moreover, those skilled in the art can combine and integrate the different applications or examples described in this specification.

[0048] Furthermore, the technical solutions of each application can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0049] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An oil leak detection and recovery device, characterized in that, include: The oil recovery system includes a collector, a collection tank, a first level gauge, an overflow pipe, and an overflow valve. The collector is used to collect oil leaks from the working machine and is placed in the collection tank. The first level gauge is installed in the collection tank to detect the oil level. The overflow pipe is connected to the collection tank, and the overflow valve is installed in the overflow pipe to control the opening and closing of the overflow pipe. A main unit recovery system is connected to the overflow pipeline, and the main unit recovery system is used to filter and recover oil flowing out of the collection tank.

2. The oil leak detection and recovery device according to claim 1, characterized in that, The collector has a conical collection chamber, is made of a light-transmitting material, and has graduations on its surface.

3. The oil leak detection and recovery device according to claim 1, characterized in that, The overflow valve is an electromagnetic valve, which is electrically connected to the first level gauge. The first level gauge is used to control the opening and closing of the electromagnetic valve.

4. The oil leak detection and recovery device according to claim 1, characterized in that, The recycling system also includes a guide pipe and a control valve. One end of the guide pipe faces the collector, and the other end is used to communicate with the working machine. The control valve is installed on the guide pipe.

5. The oil leak detection and recovery device according to any one of claims 1 to 4, characterized in that, The main unit recovery system includes a recovery oil tank, a second level gauge, a filter, an oil pump, a delivery pipe, and a power oil tank. The recovery oil tank is connected to the overflow pipe. The second level gauge is installed in the recovery oil tank. The delivery pipe is connected to both the recovery oil tank and the power oil tank. The oil pump and the filter are installed in the delivery pipe. The oil pump is used to pressurize the delivery pipe, and the filter is used to filter the oil.

6. The oil leak detection and recovery device according to claim 5, characterized in that, The main unit recovery system includes an outlet valve and an inlet valve. The outlet valve and the inlet valve are installed in the delivery pipe and located on both sides of the oil pump. The outlet valve corresponds to the recovery oil tank, and the inlet valve corresponds to the power oil tank.

7. The oil leak detection and recovery device according to claim 6, characterized in that, The outlet valve and the inlet valve are solenoid valves. The outlet valve and the inlet valve are electrically connected to the second level gauge, which is used to control the opening and closing of the outlet valve and the inlet valve.

8. The oil leak detection and recovery device according to claim 5, characterized in that, The filter includes a coarse filter and a fine filter, which are disposed in the delivery pipe and located on both sides of the oil pump. The coarse filter corresponds to the recovery oil tank, and the fine filter corresponds to the power oil tank. The pore size of the fine filter is smaller than that of the coarse filter.

9. A recovery method for the oil leak detection and recovery device according to any one of claims 1 to 8, characterized in that, The recycling method includes: The collector gathers leaked oil from the working machine; An oil collection tank is used to collect oil that overflows from the collector; The first level gauge detects the oil level in the collection tank, and after reaching the preset value, the overflow valve opens, and the oil enters the main unit recovery system through the overflow pipeline.

10. The recycling method according to claim 9, characterized in that, The step of the oil entering the main unit recovery system through the overflow pipeline includes: The recovery tank collects oil from the overflow pipe; The second level gauge detects the oil level in the recovery tank; After the second level gauge reaches the preset value, the oil pump starts, and the oil enters the power oil tank through the delivery pipe and is filtered by the filter.

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