Automatic temperature adjusting device for hydraulic brake oil of mine hoist

Abstract

The utility model discloses a mine hoist hydraulic brake oil temperature automatic adjusting device which comprises a hydraulic station, an oil tank of the hydraulic station is provided with an oil outlet pipeline, the oil outlet pipeline is provided with a variable pump, an outlet of the variable pump is connected with a radiator, and the radiator is connected with the oil tank of the hydraulic station through an oil return pipeline and comprises a cooling pipe. The two ends of the cooling pipe are connected with the oil outlet pipeline and the oil return pipeline respectively, and heat dissipation wing plates are arranged on the outer side of the cooling pipe. A cooling fan is arranged at the end, close to the oil outlet pipeline, of the radiator and connected with a motor, and the motor is connected with the controller. And a heater is arranged in the hydraulic station and is in signal connection with the controller. Compared with the prior art, hydraulic oil can be cooled and heated, and production safety is guaranteed. The device is practical in design, small in investment, obvious in hydraulic station cooling effect and outstanding in energy conservation and consumption reduction.

Description

Technical Field

[0001] The utility model relates to the technical field of mine hoist hydraulic stations, in particular to an automatic temperature regulating device for hydraulic brake oil of a mine hoist. Background Art

[0002] The normal operating temperature of the hydraulic station for large hoists used in coal mines should not exceed 58°C. From late March to mid-October each year, affected by the natural ambient temperature, the high temperature environment and the long-term operation of the hydraulic station, the hydraulic oil temperature inside the hydraulic station exceeds 58°C, causing the hoist electrical control alarm. High temperature reduces the viscosity of the hydraulic oil, reduces the oil pressure, and weakens the braking performance of the hoist, seriously affecting the safe lifting of the hoisting system. In addition, the high-temperature hydraulic oil shortens the service life of the rubber rings and coils inside the solenoid valve of the hydraulic station, and the electromechanical failure rate of the hydraulic station increases. The usual cooling method uses natural air cooling or an external high-power fan to cool the hydraulic station box. Due to the high temperature inside the garage, the fan has poor cooling effect. In the winter environment of -20°C, the viscosity of the hydraulic oil increases, and the oil pressure drops, causing the hoist electrical control overpressure alarm, the seals harden and lose their elasticity, and the hydraulic pipeline parts leak oil, seriously affecting the safe operation of the hoisting system.

[0003] In order to ensure that the lifting brake system works safely and reliably at the allowable temperature, it is necessary to design a hydraulic station hydraulic brake oil temperature regulating device to solve the above-mentioned drawbacks existing in the operation of the large hoist hydraulic station. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an automatic temperature adjustment device for the hydraulic brake oil of a mine hoist. When the temperature is high, the hydraulic oil inside the hydraulic station is led out to the outside of the hydraulic station for cooling, which has a good cooling effect; when the temperature is low, the hydraulic oil is heated to reduce the viscosity of the hydraulic oil and ensure production safety.

[0005] In order to achieve this technical purpose, the utility model adopts the following scheme:

[0006] A device for automatically regulating the temperature of hydraulic brake oil for a mine hoist comprises a hydraulic station, wherein the oil tank of the hydraulic station is provided with an oil outlet pipeline, the oil outlet pipeline is provided with a variable pump, the outlet of the variable pump is connected to a radiator, the radiator is connected to the oil tank of the hydraulic station via an oil return pipeline, the radiator comprises a cooling pipe, the two ends of the cooling pipe are respectively connected to the oil outlet pipeline and the oil return pipeline, and a heat dissipation wing plate is provided on the outside of the cooling pipe; a cooling fan is provided at one end of the radiator close to the oil outlet pipeline, the cooling fan is connected to a motor, and the motor is connected to a controller; a heater is provided in the hydraulic station, and the heater is connected to the controller signal.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] This utility model can achieve both cooling and heating of hydraulic oil. When the temperature is higher than the operating temperature, the hydraulic oil inside the hydraulic station is drawn out to the outside of the hydraulic station for cooling, achieving excellent cooling effects. When the temperature is lower than the operating temperature, the hydraulic oil is heated by the heater, reducing its viscosity and ensuring production safety. This device is practical in design, requires little investment, and achieves significant cooling effects at the hydraulic station, achieving outstanding performance in energy conservation and consumption reduction.

[0009] Furthermore, a filter, an oil outlet temperature sensor, a first valve and a first pressure sensor are provided on the oil outlet pipeline, and the oil outlet temperature sensor and the first pressure sensor are both connected to the controller.

[0010] Furthermore, an oil return temperature sensor, a second valve and a second pressure sensor are provided on the oil return pipeline, and both the oil return temperature sensor and the second pressure sensor are connected to the controller.

[0011] This utility model compares the pressure values ​​of two pressure sensors to determine the flow of brake oil in the pipeline and whether the pipeline is blocked. It also compares the temperature values ​​of two temperature sensors to determine the cooling effect of the device and provide temperature data for speed regulation of the dual-winding motor. The first and second valves are used to inspect and maintain the device during normal operation of the hydraulic station.

[0012] Furthermore, the motor adopts a dual-winding motor, and the two output shafts of the dual-winding motor are respectively connected to the cooling fan and the variable pump. The mechanical structure is simple and the transmission efficiency is high. The output speed of the motor is automatically adjusted by the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an automatic temperature regulating device for hydraulic brake oil of a mine hoist according to an embodiment of the utility model;

[0014] The markings in the figure are: 1. Heat dissipation wing plate; 2. Cooling pipe; 3. Cooling fan; 4. Motor; 5. Variable pump; 6. Filter; 7. Oil outlet temperature sensor; 8. First valve; 9. Controller; 10. Heater; 11. Control cable; 12. Return oil temperature sensor; 13. Second valve; 14. First pressure sensor; 15. Second pressure sensor; 16. Hydraulic station. DETAILED DESCRIPTION

[0015] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0016] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” or “laid on” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0017] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0019] See also Figure 1 The utility model provides an automatic temperature control device for hydraulic brake oil of a mine hoist, comprising a hydraulic station 16, a radiator, a controller 9, a variable pump 5, a filter 6, a temperature sensor, a valve, and a pressure sensor. The oil tank of the hydraulic station 16 is provided with an oil outlet pipeline, on which are provided a variable pump 5, a filter 6, an oil outlet temperature sensor 7, a first valve 8, and a first pressure sensor 14. The oil outlet pipeline is connected to the radiator, which is connected to the oil tank of the hydraulic station 16 via an oil return pipeline. The radiator comprises a cooling pipe 2, the two ends of which are respectively connected to the oil outlet pipeline and the oil return pipeline. A heat dissipation wing plate 1 is provided on the outside of the cooling pipe 2, which is welded to the cooling pipe 2 to improve the heat dissipation effect. A heat dissipation fan 3 is provided at one end of the radiator close to the oil outlet pipeline, and the heat dissipation fan 3 is connected to a motor 4. A return oil temperature sensor 12, a second valve 13, and a second pressure sensor 15 are provided on the return oil pipeline. The motor 4, oil outlet temperature sensor 7, first pressure sensor 14, oil return temperature sensor 12, and second pressure sensor 15 are each connected to a controller 9, either by wired or wireless connection. In this embodiment, the controller 9 is a PLC. A heater 10 is provided within the hydraulic station 16 and is connected to the controller 9 via a control cable 11.

[0020] In this embodiment, motor 4 utilizes a dual-winding motor, whose two output shafts are connected to cooling fan 3 and variable displacement pump 5, respectively. This results in a simple mechanical structure and high transmission efficiency. The output speed of motor 4 is automatically adjusted based on signals received by controller 9. When the oil outlet temperature sensor 7 detects excessively high temperatures, the motor's output speed is increased to rapidly cool the hydraulic oil; otherwise, the motor's output speed is reduced. Variable displacement pump 5 utilizes a circulating power-assisted variable displacement pump, directly connected to the dual-winding motor. By adjusting its speed, it alters the flow rate of brake oil within the pipeline, achieving a satisfactory cooling effect.

[0021] In this embodiment, a first pressure sensor 14 and a second pressure sensor 15 are respectively provided on the oil outlet pipeline and the oil return pipeline. By comparing the pressure values ​​of the two pressure sensors, the flow of brake oil in the pipeline is judged to reflect whether the pipeline is blocked.

[0022] In this embodiment, an oil outlet temperature sensor 7 and an oil return temperature sensor 12 are respectively provided on the oil outlet pipeline and the oil return pipeline. By comparing the temperature values ​​of the two temperature sensors, the cooling effect of the device is judged and temperature data is provided for speed regulation of the dual-winding motor.

[0023] In this embodiment, a first valve 8 and a second valve 13 are respectively provided on the oil outlet pipeline and the oil return pipeline. The first valve 8 and the second valve 13 are both manual ball valves used for maintenance of the device during normal operation of the hydraulic station 16.

[0024] In this embodiment, a heater 10 is provided in the hydraulic station 16, and three groups of heaters 10 are provided. The heater 10 is connected to the controller 9 through a control cable 11. The controller 9 performs △ / Y control on the heater 10 to heat the hydraulic oil at low temperatures, thereby achieving the purpose of saving electricity and ensuring safe production.

[0025] The working method of the present utility model is as follows: when the temperature sensor detects that the temperature of the hydraulic oil is higher than the working temperature, the variable pump 5 is used as the power source for the hydraulic oil to be drawn out, and the hydraulic oil inside the oil tank of the hydraulic station 16 is sucked into the radiator through the first valve 8, the oil outlet pipeline, and the variable pump 5. The cooling fan 3 is driven by the motor 4 to operate to cool the hydraulic oil. After the hydraulic oil is cooled, it is transported back to the inside of the oil tank of the hydraulic station 16. When it is detected that the hydraulic oil temperature is lower than the working temperature, the heater 10 is started to heat the hydraulic oil to the working temperature to ensure safe production. The start and stop of the variable pump 5, the cooling fan 3, and the heater 10 are automatically controlled by the controller 9 to automatically adjust the temperature of the hydraulic brake oil in the oil tank of the hydraulic station 16. The present utility model has a simple structure, few components, and has significant practical effects through closed-loop automatic control of temperature, pressure, and flow. The staff only needs to inspect the components and no operation is required.

[0026] Since the commissioning of this new device, the main well hydraulic station has experienced no accidents due to high hydraulic oil temperatures affecting normal operation. This ensures the safe and reliable operation of the main well winch brake system, generating over 5 million yuan in annual benefits from eliminating hydraulic station accidents, reducing power consumption, and overhauling large equipment. This new device automatically controls the start and stop of the cooling device, reducing the workload of on-duty drivers. Actual operation has proven its significant cooling effect, with the main well hydraulic station oil temperature consistently maintaining a range of 40-50°C. This replaces the high-power fan, resulting in significant energy savings.

[0027] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A device for automatically regulating the temperature of hydraulic brake oil of a mine hoist, comprising a hydraulic station (16), an oil tank of the hydraulic station (16) being provided with an oil outlet pipeline, a variable pump (5) being provided on the oil outlet pipeline, an outlet of the variable pump (5) being connected to a radiator, and the radiator being connected to the oil tank of the hydraulic station (16) via an oil return pipeline, characterized in that: The radiator includes a cooling pipe (2), both ends of the cooling pipe (2) are connected to an oil outlet pipeline and an oil return pipeline respectively, and a heat dissipation wing plate (1) is provided on the outside of the cooling pipe (2); a cooling fan (3) is provided at one end of the radiator close to the oil outlet pipeline, the cooling fan (3) is connected to a motor (4), and the motor (4) is connected to a controller (9); a heater (10) is provided in the hydraulic station (16), and the heater (10) is connected to the controller (9) for signal connection.

2. The automatic temperature regulating device for hydraulic brake oil of a mine hoist according to claim 1, characterized in that: The oil outlet pipeline is provided with a filter (6), an oil outlet temperature sensor (7), a first valve (8) and a first pressure sensor (14), and the oil outlet temperature sensor (7) and the first pressure sensor (14) are both connected to the controller (9).

3. The automatic temperature regulating device for hydraulic brake oil of a mine hoist according to claim 1, characterized in that: The oil return pipeline is provided with an oil return temperature sensor (12), a second valve (13) and a second pressure sensor (15), and both the oil return temperature sensor (12) and the second pressure sensor (15) are connected to the controller (9).

4. The automatic temperature regulating device for hydraulic brake oil of a mine hoist according to claim 1, characterized in that: The motor (4) is a double-winding motor, and the two output shafts of the double-winding motor are respectively connected to the cooling fan (3) and the variable pump (5).

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