A new type of hydraulic pump station for mine

Abstract

A novel hydraulic pump station for mining includes an oil tank, a frame, and a control valve assembly mounted on the oil tank. The oil tank is located on top of the frame, and an oil pump assembly is mounted on the frame directly below the oil tank. The interior of the oil tank is divided into a return oil zone and an intake oil zone by a partition. The oil inlet of the oil pump assembly is connected to the intake oil zone via an oil suction filter, and the oil outlet of the oil pump assembly is connected to the inlet of the control valve assembly via a two-stage high-pressure filter. Water coolers and spray mechanisms are installed on both the front and rear sides of the oil tank. The water inlet of the water cooler is connected to a mining static pressure water supply system, and the water outlet of the water cooler is connected to the water inlet of the spray mechanism. The oil inlet of the water cooler is connected to the return oil port of the control valve assembly, and the oil outlet of the water cooler is connected to the return oil zone via a return oil filter. This invention features a compact overall structure, meets the requirements for use in confined spaces, and offers high cooling efficiency.

Description

Technical Field

[0001] This utility model relates to a new type of hydraulic pump station for mining. Background Technology

[0002] With the rapid development of automated and intelligent tunneling in coal mines, the requirements for intelligent and unmanned operation are becoming increasingly stringent. For coal mine floor cleaning operations, mine-specific floor cleaning devices have emerged to replace manual coal cleaning, thereby reducing labor intensity, minimizing personnel risks, and improving cleaning efficiency. Mine-specific floor cleaning devices typically include multiple hydraulic actuators, whose movements are powered by a hydraulic pump station. Conventional hydraulic pump stations typically have their oil tanks and pump units arranged side-by-side, occupying a large space and failing to meet the requirements for use in confined spaces. Since mine cleaning devices are designed for such confined spaces, conventional hydraulic pump stations cannot move synchronously with them, making oil supply inconvenient. Furthermore, conventional hydraulic pump stations are mostly air-cooled, which is not only space-consuming but also susceptible to ambient temperature fluctuations, failing to cool the oil quickly enough. This results in prolonged high-temperature operation of the hydraulic pump station, degrading the performance of the hydraulic system and causing poor lubrication of hydraulic components, leading to damage and severely impacting the stability and lifespan of the overall hydraulic system. Moreover, underground environments are dusty and environmentally unfriendly, posing health risks to workers. Additionally, falling rocks may damage hydraulic components. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a new type of hydraulic pump station for mining.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a new type of hydraulic pump station for mining, comprising an oil tank, a frame, and a control valve assembly mounted on the oil tank. The oil tank is located on the top of the frame, and an oil pump assembly is mounted on the frame directly below the oil tank. The interior of the oil tank is divided into a return oil zone and an suction oil zone by a partition, and the bottom of the partition has a through hole connecting the return oil zone and the suction oil zone. The oil inlet of the oil pump assembly is connected to the suction oil zone through a suction oil filter, and the oil outlet of the oil pump assembly is connected to the oil inlet of the control valve assembly through a two-stage high-pressure filter. Water coolers and spray mechanisms are provided on both the front and rear sides of the oil tank. The water inlet of the water cooler is connected to the mining static pressure water supply system, the water outlet of the water cooler is connected to the water inlet of the spray mechanism, the oil inlet of the water cooler is connected to the return oil port of the control valve assembly, and the oil outlet of the water cooler is connected to the return oil zone through a return oil filter.

[0005] Beneficial Effects: Due to its layered design, the oil tank is positioned above the oil pump assembly, and a water cooler replaces the traditional air-cooling device, resulting in a compact overall structure for the hydraulic pump station. This meets the requirements for use in coal mines with limited space, allows for synchronous movement with the mine cleaning device, and facilitates oil supply. The water cooler utilizes cooling water from the existing mine static pressure water supply system to cool the hydraulic oil. Water is readily available, unaffected by ambient temperature, and the inlet flow rate can be adjusted according to oil temperature to meet heat dissipation needs. This effectively reduces oil temperature, resulting in high cooling efficiency and preventing prolonged high-temperature operation of the hydraulic pump station, thus maintaining the stability and lifespan of the overall hydraulic system. Water cooled by the water cooler enters the spray mechanism for direct dust suppression, improving the underground working environment, promoting environmental friendliness, increasing water resource utilization, and benefiting worker health. Furthermore, the oil tank is internally divided into a return oil zone and an intake oil zone by a partition. This allows the oil to be buffered in the return oil zone, promoting bubble precipitation and impurity sedimentation, preventing cavitation, and protecting hydraulic components.

[0006] Based on the above, the oil pump assembly includes an explosion-proof motor and a dual variable displacement pump. Both the explosion-proof motor and the dual variable displacement pump are mounted on the frame and located directly below the oil tank. The explosion-proof motor drives the dual variable displacement pump to work. The oil inlet of the dual variable displacement pump is connected to the oil suction area through a first oil pipeline, and the oil outlet of the dual variable displacement pump is connected to the oil inlet of the control valve assembly through a second oil pipeline. The secondary high-pressure filter is installed on the second oil pipeline.

[0007] By setting up a dual variable displacement pump, the swashplate angle of the pump can be automatically adjusted using the LS feedback signal. The valve spool opening can be controlled by adjusting the voltage, achieving automatic adjustment of pressure and flow. Furthermore, the two-stage high-pressure filter ensures the cleanliness of the hydraulic fluid in the system, effectively preventing small particulate impurities from entering the pump and valve and causing failure. It also solves the problem of hydraulic valve spool blockage and jamming, ensuring stable and reliable operation of the hydraulic system.

[0008] Based on the above, a pressure detection device is also installed on the top of the oil tank to monitor the pressure of the dual variable pump in real time.

[0009] Based on the above, a level gauge is installed on the side of the oil tank, and an oil temperature and level sensor and an air filter are also installed on the top of the oil tank, which are inserted into the oil suction area. The oil temperature and level sensor can automatically detect the oil temperature and level. When the level is lower than the set value or the oil temperature is higher than the set value, an alarm will be issued, thereby triggering the pump station to automatically stop and replenish oil, improving the overall efficiency of the machine and solving the problem of hydraulic component failure due to oil leakage or high temperature and failure to observe in time.

[0010] Based on the above, the top of the oil tank is detachably equipped with a protective cover covering the return oil filter, the pressure detection device, the oil temperature and level sensor, and the air filter. This effectively protects the hydraulic components below (such as the return oil filter, the pressure detection device, the oil temperature and level sensor, and the air filter), preventing rock from hitting the hydraulic components and facilitating the inspection and maintenance of the hydraulic components.

[0011] Based on the above, a guide channel is provided at the top of the oil tank. One end of the guide channel is blocked, and the other end is located above the oil return zone and connected to a guide pipe. The other end of the guide pipe extends into the lower part of the oil return zone. The top of the oil tank is also provided with multiple small-flow oil return ports that communicate with the guide channel. The small-flow return oil from the multiple small-flow oil return ports can be collected through the guide channel and then flow directly into the lower part of the oil return zone through the guide pipe, effectively preventing splashing.

[0012] This utility model has substantial features and advancements compared to existing technologies. Specifically, it adopts a layered design and uses water cooling instead of air cooling, resulting in a compact overall structure that meets the requirements for use in coal mine equipment under extreme space constraints. It can move synchronously with the mine cleaning device and provides convenient oil supply. The water cooler can quickly reduce oil temperature with high cooling efficiency, avoiding prolonged high-temperature operation of the hydraulic pump station and not affecting the stability and service life of the overall hydraulic system. The water passing through the water cooler enters the spray mechanism for direct dust removal, improving the underground working environment, achieving green environmental protection, increasing water resource utilization, and benefiting workers' health. Attached Figure Description

[0013] Figure 1 This is the axial view of the present invention. Figure 1 .

[0014] Figure 2 This is the axial view of the present invention. Figure 2 .

[0015] Figure 3 This is the axial view of the present invention. Figure 3 .

[0016] Figure 4 This is a schematic diagram of the hydraulic pump station structure of this utility model.

[0017] In the diagram: 1. Oil tank; 2. Frame; 3. Water cooler; 4. Protective cover; 5. Explosion-proof motor; 6. Dual variable pump; 7. Two-stage high-pressure filter; 8. Level gauge; 9. Oil temperature and level sensor; 10. Suction filter; 11. Return filter; 12. Air filter; 13. Pressure detection device; 14. Small flow return port. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] like Figures 1-4 As shown, a new type of hydraulic pump station for mining includes an oil tank 1, a frame 2, and a control valve assembly (not shown) mounted on the oil tank 1. The oil tank 1 is located on top of the frame 2, and an oil pump assembly is mounted on the frame 2 directly below the oil tank 1. The interior of the oil tank 1 is divided into a return oil zone and a suction oil zone by a partition. The bottom of the partition has a through hole connecting the return oil zone and the suction oil zone. The oil inlet of the oil pump assembly is connected to the suction oil zone through a suction filter 10. The oil outlet of the component is connected to the oil inlet of the control valve group through a secondary high-pressure filter 7. Water coolers 3 and spray mechanisms (not shown) are provided on both the front and rear sides of the oil tank 1. The water inlet of the water cooler 3 is connected to the mine static pressure water supply system (existing technology). The water outlet of the water cooler 3 is connected to the water inlet of the spray mechanism. The oil inlet of the water cooler 3 is connected to the oil return port of the control valve group. The oil outlet of the water cooler 3 is connected to the oil return zone through the oil return filter 11.

[0020] Specifically, the oil pump assembly includes an explosion-proof motor 5 and a dual variable pump 6. Both the explosion-proof motor 5 and the dual variable pump 6 are mounted on the frame 2 and located directly below the oil tank 1. The explosion-proof motor 5 drives the dual variable pump 6 to work. The oil inlet of the dual variable pump 6 is connected to the oil suction area through a first oil pipeline. A two-stage high-pressure filter 7 is installed on the first oil pipeline. The oil outlet of the dual variable pump 6 is connected to the oil inlet of the control valve group through a second oil pipeline.

[0021] Specifically, the top of the oil tank is also equipped with a pressure detection device 13 for real-time monitoring of the pressure of the dual variable pump 6.

[0022] Specifically, a level gauge 8 is installed on the side of the oil tank 1, and an oil temperature and level sensor 9 and an air filter 10 are also installed on the top of the oil tank 1 and inserted into the oil suction area.

[0023] Specifically, the top of the oil tank 1 is detachably equipped with a protective cover 4 that covers the return oil filter 11, the pressure detection device 13, the oil temperature and level sensor 9, and the air filter 10.

[0024] Specifically, a guide channel is provided at the top of the oil tank 1. One end of the guide channel is blocked, and the other end is located above the oil return zone and connected to a guide pipe. The other end of the guide pipe extends into the lower part of the oil return zone. The top of the oil tank 1 is also provided with multiple small-flow oil return ports 14 that communicate with the guide channel. The small-flow return oil from the multiple small-flow oil return ports 14 can be collected through the guide channel and then flow directly into the lower part of the oil return zone through the guide pipe.

[0025] This utility model adopts a two-tiered arrangement, placing the oil tank 1 above the oil pump assembly, and using a water cooler 3 instead of a traditional air-cooling device. This makes the overall structure of the hydraulic pump station compact, meeting the requirements for use in coal mine equipment under extreme space constraints. It can move synchronously with the mine cleaning device, and oil supply is convenient. The water cooler 3 can use the cooling water provided by the current mine static pressure water supply system to cool the hydraulic oil. Water is readily available, unaffected by ambient temperature, and the inlet flow rate of the water cooler 3 can be adjusted according to the oil temperature to meet heat dissipation requirements. It can reduce oil temperature in a timely manner, has high cooling efficiency, avoids the hydraulic pump station from working at high temperatures for a long time, and does not affect the stability and service life of the overall hydraulic system. The water passing through the water cooler 3 enters the spray mechanism, which can directly spray dust removal, improve the underground working environment, achieve green environmental protection, improve water resource utilization, and benefit the health of workers.

[0026] Furthermore, by setting up a dual variable pump 6, the swashplate angle of the dual variable pump 6 can be automatically adjusted using the LS feedback signal. By adjusting the voltage, the valve core opening can be controlled, thereby achieving automatic adjustment of pressure and flow.

[0027] Furthermore, a secondary high-pressure filter 7 is installed on the second oil pipeline connecting the oil outlet of the dual variable pump 6 and the oil inlet of the control valve group. This ensures the cleanliness of the oil in the hydraulic system, effectively prevents small particulate impurities from entering the pump valve and causing pump valve failure, solves the problem of hydraulic valve core blockage and jamming, and makes the hydraulic system operate stably and reliably.

[0028] Furthermore, the interior of the oil tank 1 is divided into a return oil zone and an oil suction zone by a partition. This allows the oil to be buffered in the return oil zone, which is beneficial for the precipitation of air bubbles and the sedimentation of impurities, thus preventing cavitation and protecting hydraulic components.

[0029] Furthermore, the hydraulic pump station is equipped with a pressure detection device 13 and an oil temperature and level sensor 9. The pressure detection device 13 can monitor the pressure of the dual variable pump 6 in real time, and the oil temperature and level sensor 9 can monitor the oil level and oil temperature in the oil tank in real time. This enables the hydraulic pump station to have high temperature warning and forced shutdown functions, which can effectively protect system components. That is, when the liquid level is lower than the set value or the oil temperature is higher than the set value, an alarm will be issued, thereby triggering the pump station to automatically stop and replenish oil, improving the overall efficiency of the machine and solving the problem of hydraulic component failure due to oil leakage or high temperature and failure to observe in time. In addition, the oil tank 1 is also equipped with a level gauge 8, which allows the staff to intuitively check the oil level.

[0030] Furthermore, a protective cover 4 is detachably installed on the top of the oil tank 1, which can effectively protect the hydraulic components (such as the return oil filter 11, the pressure detection device 13, the oil temperature and level sensor 9, and the air filter 10), prevent the hydraulic components from being hit by gangue, and facilitate the inspection and maintenance of the hydraulic components.

[0031] Furthermore, the top of the oil tank 1 is provided with multiple small-flow return oil ports 14. The oil from the multiple small-flow return oil ports can be collected together through the guide channel inside the oil tank 1, and then flow directly into the bottom of the oil return area of ​​the oil tank through the guide pipe, effectively preventing splashing.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A novel hydraulic pump station for mining, comprising an oil tank, a frame, and a control valve assembly mounted on the oil tank, characterized in that: The oil tank is located at the top of the frame, and an oil pump assembly is mounted on the frame directly below the oil tank. The interior of the oil tank is divided into a return oil zone and an oil suction zone by a partition, and the bottom of the partition has a through hole connecting the return oil zone and the oil suction zone. The oil inlet of the oil pump assembly is connected to the oil suction zone through an oil suction filter, and the oil outlet of the oil pump assembly is connected to the oil inlet of the control valve group through a two-stage high-pressure filter. Water coolers and spray mechanisms are provided on both the front and rear sides of the oil tank. The water inlet of the water cooler is connected to the mine static pressure water supply system, the water outlet of the water cooler is connected to the water inlet of the spray mechanism, the oil inlet of the water cooler is connected to the return oil port of the control valve group, and the oil outlet of the water cooler is connected to the return oil zone through an oil return filter.

2. The new type of hydraulic pump station for mining according to claim 1, characterized in that: The oil pump assembly includes an explosion-proof motor and a dual variable displacement pump. Both the explosion-proof motor and the dual variable displacement pump are mounted on the frame and located directly below the oil tank. The explosion-proof motor drives the dual variable displacement pump. The oil inlet of the dual variable displacement pump is connected to the oil suction area through a first oil pipeline, and the oil outlet of the dual variable displacement pump is connected to the oil inlet of the control valve assembly through a second oil pipeline. The secondary high-pressure filter is installed on the second oil pipeline.

3. The new type of hydraulic pump station for mining according to claim 2, characterized in that: The top of the oil tank is also equipped with a pressure detection device for real-time monitoring of the pressure of the dual variable pump.

4. The novel hydraulic pump station for mining according to claim 3, characterized in that: A level gauge is installed on the side of the oil tank, and an oil temperature and level sensor and an air filter are installed on the top of the oil tank and inserted into the oil suction area.

5. The novel hydraulic pump station for mining according to claim 4, characterized in that: The top of the oil tank is detachably fitted with a protective cover that covers the return oil filter, the pressure detection device, the oil temperature and level sensor, and the air filter.

6. The novel hydraulic pump station for mining according to claim 4 or 5, characterized in that: A flow guide channel is provided at the top of the oil tank. One end of the flow guide channel is blocked, and the other end is located above the oil return zone and connected to a flow guide pipe. The other end of the flow guide pipe extends into the lower part of the oil return zone. The top of the oil tank is also provided with multiple small-flow oil return ports that communicate with the flow guide channel. The small-flow return oil from the multiple small-flow oil return ports can be collected through the flow guide channel and then flow directly into the lower part of the oil return zone through the flow guide pipe.

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