A cooling and oil filtering integrated device outside a hydraulic system
Patent Information
- Application Number
- CN202522567200.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-12-03
AI Technical Summary
大量未做功的高温液压油直接回到油箱，液压系统热平衡点变高，系统温度整体上升，导致液压油粘度下降，内泄量继续增加，热平衡点进一步升高的恶性循环
1、本实用新型中，油液从油箱经出油管抽出，由变量柱塞泵加压后，通过比例换向阀及进油管路输送至液压马达，驱动捞渣机排出锅炉炉渣，外循环机构通过循环油泵抽取油箱内油液，第一回路油管设吸油阀防回流，油液经回路冷却器冷却、回路油过滤器过滤后，由第二回路油管回输油箱，稳定系统热平衡，延长液压油寿命并保护液压系统。控制组件配合吸油阀调控循环油泵，无需下井操作，改善井坑执行机构工作环境。
Smart Images
Figure CN224835679U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of slag treatment technology in thermal power plants, and in particular to an integrated cooling and oil filtration device with an external hydraulic system. Background Technology
[0002] Bottom ash generated during the operation of boilers in thermal power plants is typically transported by scraper ash removers and collected in ash bins for further disposal. In the design of the drive system for scraper ash removers, hydraulic drive has become the mainstream solution widely used in the industry due to its characteristics such as high output torque, good operational stability, and strong overload protection. It can adapt to the high-load and continuous operation requirements during the conveying of bottom ash.
[0003] Although hydraulically driven scraper slag removers are widely used in bottom ash conveying in thermal power plants, long-term wear and tear on the hydraulic motor or deterioration of the hydraulic oil can lead to poor internal oil film sealing and a continuous increase in internal oil leakage. A large amount of unused, high-temperature hydraulic oil returns directly to the oil tank, raising the thermal equilibrium point of the hydraulic system and causing an overall increase in system temperature. This results in a vicious cycle: decreased hydraulic oil viscosity, further increased internal leakage, and an even higher thermal equilibrium point. In severe cases, this can lead to a decrease in the slag remover system's output or even complete hydraulic system failure.
[0004] Therefore, an external cooling and oil filtration integrated device for hydraulic systems is needed to solve the above problems. Utility Model Content
[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of internal oil leakage affecting the stability of the hydraulic system. To this end, we propose an external integrated cooling and oil filtration device for the hydraulic system.
[0006] To achieve the above objectives, this application adopts the following technical solution: an external cooling and oil filtration integrated device for a hydraulic system, comprising an oil tank, an external circulation mechanism on one side of the oil tank, a drain valve fixedly installed on the other side of the oil tank, an oil outlet pipe fixedly installed on the side of the oil tank near the drain valve, a variable displacement piston pump fixedly installed at one end of the oil outlet pipe, a proportional directional valve fixedly installed on the surface of the variable displacement piston pump, an oil inlet pipe fixedly installed at the output end of the proportional directional valve, a hydraulic motor fixedly installed at one end of the oil inlet pipe, a slag remover installed at the output end of the hydraulic motor, and a boiler body fixedly installed at the top of the slag remover. The proportional directional valve controls the variable displacement piston pump to draw hydraulic oil from inside the oil tank and deliver it to the hydraulic motor through the oil inlet pipe, thereby driving the slag remover to discharge slag generated by the boiler body. Simultaneously, the external circulation mechanism cools the internally leaking hydraulic oil, preventing hydraulic oil deterioration.
[0007] Preferably, the external circulation mechanism includes a first circuit oil pipe fixedly installed on one side of the oil tank, an oil suction valve fixedly installed on the outer surface of the first circuit oil pipe, a circulation oil pump fixedly installed at one end of the first circuit oil pipe, a circuit cooler fixedly installed at the output end of the circulation oil pump, a circuit oil filter fixedly installed at the output end of the circuit cooler, a control component electrically connected to the circuit cooler and the circulation oil pump, and a second circuit oil pipe fixedly installed at the output end of the circuit oil filter, with one end of the second circuit oil pipe fixedly installed on one side of the oil tank.
[0008] Preferably, an oil outlet pipe is fixedly installed at the top of the hydraulic motor, one end of the oil outlet pipe is fixedly installed on the surface of the proportional directional valve, a return oil filter is connected to one side of the proportional directional valve, a return oil cooler is connected to the surface of the return oil filter, the return oil cooler is fixedly installed at the top of the oil tank, and the drain port of the return oil cooler extends into the interior of the oil tank.
[0009] Preferably, an oil leakage pipe is fixedly installed at the bottom of the hydraulic motor, an oil leakage filter is fixedly installed at one end of the oil leakage pipe, the oil leakage filter is fixedly installed at the front end of the oil tank, and the oil drain port of the oil leakage filter is fixedly installed and extends into the interior of the oil tank.
[0010] Preferably, a liquid level detection device is fixedly installed on the top of the oil tank, and a temperature detection device is fixedly installed on the top of the oil tank. The temperature detection device and the liquid level detection device are electrically connected to the control component.
[0011] Preferably, a solenoid valve is fixedly installed on the surface of both the oil outlet pipe and the oil drain valve, and a manhole for cleaning the oil tank is provided on the surface of the oil tank.
[0012] The technical effects and advantages of this utility model are as follows: 1. In this utility model, the oil is drawn from the oil tank through the outlet pipe, pressurized by a variable displacement piston pump, and then transported to the hydraulic motor through a proportional directional valve and inlet pipe. This drives the slag remover to discharge boiler slag. The external circulation mechanism draws oil from the oil tank through a circulating oil pump. The first circuit oil pipe is equipped with a suction valve to prevent backflow. After being cooled by the circuit cooler and filtered by the circuit oil filter, the oil is returned to the oil tank through the second circuit oil pipe, stabilizing the system's thermal balance, extending the hydraulic oil's lifespan, and protecting the hydraulic system. The control components, in conjunction with the suction valve, regulate the circulating oil pump, eliminating the need for downhole operation and improving the working environment of the wellbore actuator.
[0013] 2. In this utility model, the oil is delivered to the return oil filter via the oil outlet pipe by the hydraulic motor. After filtration, it enters the return oil cooler for cooling. The internal leakage oil is introduced into the leakage filter through the oil leakage pipe at the bottom of the hydraulic motor. After filtration, it is discharged into the oil tank. The oil outlet of the leakage filter is close to the corresponding circuit oil pipe, which helps the internal leakage oil to quickly participate in the external circulation for cooling. This avoids the vicious cycle of high oil temperature mixing with circulating oil, which leads to decreased viscosity and increased internal leakage. The oil tank is equipped with temperature and liquid level detection devices. The control component adjusts the start and stop of the circulating oil pump and the circuit cooler according to the detection data. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the proportional directional valve of this utility model; Figure 3 This is a schematic diagram of the structure of the oil leak filter of this utility model; Figure 4 This is a schematic diagram of the external circulation mechanism of this utility model; Figure 5 This is a schematic diagram illustrating the principle of the hydraulic system of this utility model.
[0015] In the diagram: 1. Boiler body; 2. Ash removal machine; 3. Hydraulic motor; 4. Variable displacement piston pump; 5. Oil tank; 6. Proportional directional valve; 7. Oil outlet pipe; 8. Return oil cooler; 9. Return oil filter; 10. Leakage filter; 11. Leakage oil delivery pipe; 12. Oil tank cleaning manhole; 13. Suction valve; 14. Discharge valve; 15. Temperature detection device; 16. Liquid level detection device; 17. First circuit oil pipe; 18. Circulating oil pump; 19. Circuit cooler; 20. Circuit oil filter; 21. Second circuit oil pipe; 22. Oil inlet pipe; 23. Oil outlet pipe; 24. Control components. Detailed Implementation
[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0017] Reference Figure 1 , Figure 4 , Figure 5As shown, this utility model provides a technical solution: an external cooling and oil filtration integrated device for a hydraulic system, comprising: an oil tank 5 for storing hydraulic oil; an external circulation mechanism on one side of the oil tank 5; and a drain valve 14 fixedly installed on the other side of the oil tank 5 for draining hydraulic oil from the oil tank 5 when changing the hydraulic oil; an oil outlet pipe 7 fixedly installed on the side of the oil tank 5 near the drain valve 14 for drawing oil out of the oil tank 5; and a variable displacement piston pump 4 fixedly installed at one end of the oil outlet pipe 7 for pumping out hydraulic oil. A proportional directional valve 6 is fixedly installed on the surface of the hydraulic oil variable displacement piston pump 4. The proportional directional valve 6 is used to regulate the flow rate and direction of the hydraulic oil. An oil inlet pipe 22 is fixedly installed at the output end of the proportional directional valve 6. The oil inlet pipe 22 is used to deliver oil to the hydraulic motor 3, enabling the hydraulic motor 3 to perform work. The hydraulic motor 3 is fixedly installed at one end of the oil inlet pipe 22. The hydraulic motor 3 is used to drive the slag remover. The slag remover 2 is installed at the output end of the hydraulic motor 3. The slag remover 2 is used to discharge the slag generated by the boiler furnace body 1. The top of the slag remover 2 is fixedly installed on the boiler furnace body 1. The hydraulic oil is drawn out of the oil tank 5 by the variable displacement piston pump 4 controlled by the proportional directional valve 6 and delivered to the hydraulic motor 3 through the oil inlet pipe 22. This causes the hydraulic motor 3 to drive the slag remover 2 to discharge the slag generated by the boiler furnace body 1. At the same time, an external circulation mechanism is set up to cool the internally leaking hydraulic oil and prevent the hydraulic oil from deteriorating.
[0018] The external circulation mechanism includes a first circuit oil pipe 17 fixedly installed on one side of the oil tank 5. The first circuit oil pipe 17 is used to transport hydraulic oil from the oil tank 5 to the external circulation circuit. An oil suction valve 13 is fixedly installed on the outer surface of the first circuit oil pipe 17. The oil suction valve 13 is used to control the suction and flow direction of the oil. A circulating oil pump 18 is fixedly installed at one end of the first circuit oil pipe 17. The circulating oil pump 18 is used to extract hydraulic oil. A circuit cooler 19 is fixedly installed at the output end of the circulating oil pump 18. The circuit cooler 19 is used to cool the oil in the external circulation circuit. A loop oil filter 20 is fixedly installed at the output end of the cooler 19. The loop oil filter 20 is used to filter impurities in the external circulating oil. The loop cooler 19 and the circulating oil pump 18 are electrically connected to a control component 24. The control component 24 is used to control the start and stop of the loop cooler 19 and the circulating oil pump 18 (preferably model ZRT-102). A second loop oil pipe 21 is fixedly installed at the output end of the loop oil filter 20. The second loop oil pipe 21 is used to transport the cooled oil back into the oil tank 5. One end of the second loop oil pipe 21 is fixedly installed on one side of the oil tank 5.
[0019] Reference Figure 1 , Figure 4 , Figure 5As shown, in this embodiment: oil is drawn from the inside of the oil tank 5 through the oil outlet pipe 7, pressurized by the variable displacement piston pump 4, and delivered to the hydraulic motor 3 through the oil inlet pipe 22 by the proportional directional valve 6. The drive shaft of the hydraulic motor 3 drives the slag remover 2 to discharge the slag generated by the boiler furnace 1. By setting an external circulation mechanism, the oil inside the oil tank 5 is drawn out by the circulating oil pump 18, and an oil suction valve 13 is set on the surface of the first circuit oil pipe 17 to prevent backflow. The oil is cooled by the circuit cooler 19, filtered by the circuit oil filter 20, and then delivered back to the inside of the oil tank 5 through the second circuit oil pipe 21. This structure stabilizes the thermal balance point of the hydraulic system through external circulation, improves the service life of the hydraulic oil, and protects the hydraulic system. At the same time, the circulating oil pump 18 is controlled by the control component 24, and in conjunction with the oil suction valve 13, so that no well-drilling operation is required, improving the working environment of the well-drilling actuator.
[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, this utility model provides a technical solution: an external cooling and oil filtration integrated device for a hydraulic system, including an oil outlet pipe 23 fixedly installed at the top of a hydraulic motor 3, the oil outlet pipe 23 being used to discharge hydraulic oil and forming a loop with the oil inlet pipe 22, one end of the oil outlet pipe 23 being fixedly installed on the surface of a proportional directional valve 6, a return oil filter 9 being connected to one side of the proportional directional valve 6, the return oil filter 9 being used to filter the return oil, a return oil cooler 8 being connected to the surface of the return oil filter 9, the return oil cooler 8 being used to cool the return oil, the return oil cooler 8 being fixedly installed at the top of an oil tank 5, the drain port of the return oil cooler 8 extending into the interior of the oil tank 5, and a leaking oil supply pipe 11 being fixedly installed at the bottom of the hydraulic motor 3, the leaking oil supply pipe 11 being used to drain the oil from the motor. Oil is drained out, and an oil filter 10 is fixedly installed at one end of the oil drain pipe 11. The oil filter 10 is used to filter the oil drained from the motor. The oil filter 10 is fixedly installed at the front end of the oil tank 5. The oil drain port of the oil filter 10 is fixedly installed and extends into the interior of the oil tank 5. A liquid level detection device 16 is fixedly installed at the top of the oil tank 5. The liquid level detection device 16 is used to detect the oil level line of the oil tank 5. A temperature detection device 15 is fixedly installed at the top of the oil tank 5. The temperature detection device 15 is used to detect the oil temperature. The temperature detection device 15 and the liquid level detection device 16 are electrically connected to the control component 24. Solenoid valves are fixedly installed on the surface of the oil outlet pipe 7 and the oil drain valve 14. An oil tank cleaning manhole 12 is opened on the surface of the oil tank 5 for cleaning the inside of the oil tank 5.
[0021] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5As shown, in this embodiment, further optimization is made: In the oil circuit, the oil outlet pipe 23 delivers oil from the hydraulic motor 3 to the return oil filter 9, and after filtration, it is delivered to the return oil cooler 8 for cooling. At the same time, the internal leakage oil is delivered through the oil leakage pipe 11 at the bottom of the hydraulic motor 3 to the oil leakage filter 10 for filtration and then discharged into the oil tank 5. The oil outlet of the oil leakage filter 10 is close to the side of the first circuit oil pipe 17, so that the internal leakage oil can quickly enter the external circulation mechanism for cooling. This avoids the oil generated during the operation of the hydraulic motor 3 flowing back into the oil tank 5, where the temperature cannot drop for a long time, and mixing with the hydraulic oil in the circulation circuit, which would cause the hydraulic oil viscosity to decrease, increase the internal leakage, and form a vicious cycle. At the same time, a temperature detection device 15 and a liquid level detection device 16 are set to monitor the oil level and temperature inside the oil tank 5. Based on the temperature and oil level, the control component 24 controls the start and stop of the circulation oil pump 18 and the circuit cooler 19.
[0022] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.
Claims
1. An external cooling and oil filtration integrated device for a hydraulic system, characterized in that: The system includes an oil tank, with an external circulation mechanism on one side and a drain valve fixedly installed on the other side. An oil outlet pipe is fixedly installed on the side of the oil tank near the drain valve. A variable displacement piston pump is fixedly installed at one end of the oil outlet pipe. A proportional directional valve is fixedly installed on the surface of the variable displacement piston pump. An oil inlet pipe is fixedly installed at the output end of the proportional directional valve. A hydraulic motor is fixedly installed at one end of the oil inlet pipe. A slag remover is installed at the output end of the hydraulic motor. A boiler body is fixedly installed at the top of the slag remover. The variable displacement piston pump, controlled by the proportional directional valve, draws hydraulic oil from the oil tank and delivers it to the hydraulic motor through the oil inlet pipe. This allows the hydraulic motor to drive the slag remover to discharge slag generated by the boiler body. Simultaneously, the external circulation mechanism cools the internally leaking hydraulic oil to prevent deterioration.
2. The integrated cooling and oil filtration device for an external hydraulic system according to claim 1, characterized in that: The external circulation mechanism includes a first circuit oil pipe fixedly installed on one side of the oil tank. An oil suction valve is fixedly installed on the outer surface of the first circuit oil pipe. A circulating oil pump is fixedly installed at one end of the first circuit oil pipe. A circuit cooler is fixedly installed at the output end of the circulating oil pump. A circuit oil filter is fixedly installed at the output end of the circuit cooler. The circuit cooler and the circulating oil pump are electrically connected to a control component. A second circuit oil pipe is fixedly installed at the output end of the circuit oil filter. One end of the second circuit oil pipe is fixedly installed on one side of the oil tank.
3. The integrated cooling and oil filtration device for an external hydraulic system according to claim 1, characterized in that: An oil outlet pipe is fixedly installed at the top of the hydraulic motor. One end of the oil outlet pipe is fixedly installed on the surface of the proportional directional valve. A return oil filter is connected to one side of the proportional directional valve. A return oil cooler is connected to the surface of the return oil filter. The return oil cooler is fixedly installed at the top of the oil tank. The drain port of the return oil cooler extends into the interior of the oil tank.
4. The integrated cooling and oil filtration device for an external hydraulic system according to claim 1, characterized in that: An oil leakage pipe is fixedly installed at the bottom of the hydraulic motor, and an oil leakage filter is fixedly installed at one end of the oil leakage pipe. The oil leakage filter is fixedly installed at the front end of the oil tank, and the oil drain port of the oil leakage filter is fixedly installed and extends into the interior of the oil tank.
5. The integrated cooling and oil filtration device for an external hydraulic system according to claim 1, characterized in that: A liquid level detection device is fixedly installed on the top of the oil tank, and a temperature detection device is fixedly installed on the top of the oil tank. The temperature detection device and the liquid level detection device are electrically connected to the control component.
6. The integrated cooling and oil filtration device for an external hydraulic system according to claim 1, characterized in that: Solenoid valves are fixedly installed on the surfaces of the oil outlet pipe and the oil drain valve, and a manhole for cleaning the oil tank is provided on the surface of the oil tank.