Hydraulic oil cooling system applied to underground fixed hydraulic crusher

Abstract

The utility model discloses a hydraulic oil cooling system applied to an underground fixed hydraulic crusher, which comprises a base, a hydraulic oil tank mounted on the base and an underground water source. A water-cooling heat exchanger, a driving motor and a hydraulic pump driven by the driving motor are further installed on the machine base. The liquid inlet end of the hydraulic pump is connected with the hydraulic oil tank through a pipeline, and the liquid outlet end of the hydraulic pump is connected with the tube pass liquid inlet end of the water-cooling heat exchanger through a pipeline. The tube pass liquid outlet end of the water-cooling heat exchanger is connected with the hydraulic oil tank through an oil return pipe. The shell side water inlet end of the water-cooling heat exchanger is connected with the underground water source through a water inlet pipe, and the shell side water outlet end of the water-cooling heat exchanger is connected with a water return pipe. And a filtering and sewage discharging mechanism is mounted on the water inlet pipe. On the premise of not conflicting with an original heat dissipation system, the underground water source is fully utilized, various problems of equipment caused by high temperature of hydraulic oil are reduced, and the underground practical working requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydraulic oil cooling system, concretely relates to a hydraulic oil cooling system applied to an underground fixed hydraulic crusher. BACKGROUND

[0002] In the use process of the underground fixed hydraulic crusher, the working face environment temperature is affected by the ventilation condition. When the ventilation condition is good, the working face environment temperature is relatively suitable, and when the ventilation condition is poor, the working face environment temperature can be as high as 45-50 degrees Celsius, which seriously affects the heat dissipation of the hydraulic oil of the underground fixed hydraulic crusher and causes high temperature of the hydraulic oil. When the high temperature of the hydraulic oil occurs, various hazards can be caused. First, the oxidation reaction of the hydraulic oil is accelerated in the high temperature environment, the acid value of the hydraulic oil is increased, various precipitates are easily generated by decomposition, the oil is thickened, the flowability is reduced, the energy transmission and control accuracy of the hydraulic system are affected; second, the hydraulic components in the hydraulic system, such as the hydraulic cylinder, the hydraulic pump, the hydraulic motor and the filter element, are sensitive to the quality and temperature of the hydraulic oil, the materials of certain hydraulic components can be deformed or aged under high temperature, the service life of the hydraulic components is reduced, and then faults are caused, the reliability and stability of the hydraulic system are affected.

[0003] The conventional cooling method of the hydraulic oil of the underground fixed hydraulic crusher is that a motor or a hydraulic motor is used as a power element to drive a fan to blow and cool the radiator. In the specific environment of the underground mine, such as the situation that the ventilation is poor and the temperature of the equipment working face is too high, the expected heat dissipation effect cannot be achieved.

[0004] Some people have proposed to use the underground water source to cool the hydraulic oil through the water cooling heat exchange method, but due to the complex working environment of the underground mine, the water source often has the characteristics of poor cleanliness, and the circulating water used as the heat exchanger is limited by the water quality. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a hydraulic oil cooling system applied to an underground fixed hydraulic crusher, first, to solve the cooling and temperature reduction problem of the hydraulic oil of the underground fixed hydraulic crusher, and second, to solve the filtration problem of the underground refrigeration water.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a hydraulic oil cooling system applied to the fixed hydraulic crusher in the pit, including the base and the hydraulic oil tank installed on the base, still including the water source in the pit, still install water -cooled heat exchanger, drive motor and the hydraulic pump driven by drive motor on the base, the liquid inlet of hydraulic pump is connected hydraulic oil tank through the pipeline, and the liquid outlet is connected the pipe -way liquid inlet of water -cooled heat exchanger through the pipeline, and the pipe -way liquid outlet of water -cooled heat exchanger is connected hydraulic oil tank through the oil return pipe, the shell -side water inlet of water -cooled heat exchanger is connected the water source in the pit through the water inlet pipe, and the shell -side water outlet of water -cooled heat exchanger is connected with the backwater pipe, and install the filter blowdown mechanism on the water inlet pipe.

[0008] Preferably, the filter blowdown mechanism can be an automatic blowdown valve with filtering function.

[0009] Preferably, the filter blowdown mechanism can further include a housing as a filter container shell; a filter screen is installed in the housing to divide the housing space into two; the front side in the housing space and the rear side in the housing space are connected in series on the water inlet pipe, and a pressure gauge and a main control valve are installed on the pipeline between the housing and the water source in the pit; the front side in the housing space is connected with a blowdown control valve; the filter blowdown mechanism further includes a nozzle arranged in the rear side of the housing space and having a spraying direction towards the filter screen; the nozzle is connected with the water inlet pipe through a pipeline with a cleaning water control valve installed; the connection position between the pipeline with the cleaning water control valve and the water inlet pipe is located on the pipeline between the main control valve and the water source in the pit.

[0010] Further preferably, the nozzle is installed on a spray head, and the water inlet end of the spray head is connected with the water inlet pipe through the pipeline with the cleaning water control valve installed.

[0011] Further preferably, the nozzle can be fixedly connected to the inner wall of the housing.

[0012] Preferably, the hydraulic oil tank is connected with the liquid outlet of the hydraulic pump through a pipeline with a safety valve installed.

[0013] Compared with the prior art, the utility model has the beneficial technical effects as follows:

[0014] First, the utility model discloses a set of water cooling heat dissipation system is connected to the hydraulic oil tank of the fixed hydraulic crusher in pit. When the ambient temperature of the operation surface is suitable, the original fan heat dissipation system can meet the heat dissipation demand of hydraulic oil, and the system is not started and does not participate in work. When the temperature of the operation surface is too high, the system works when the working condition of the system is met, that is, the hydraulic oil temperature sensor reaches the set temperature value and the hydraulic oil level sensor is not less than one third of the volume of the hydraulic oil tank. When the hydraulic oil temperature reduces to the set value, the heat dissipation work of the system is finished. The utility model makes full use of the water source in pit under the premise of not conflicting with the original heat dissipation system, reduces various problems of equipment caused by high temperature of hydraulic oil, and meets the actual work demand in pit.

[0015] Second, the filter and pollution discharge mechanism is arranged in the system of the utility model, and the filtering problem of the refrigeration water in pit can be better solved. The first filter and pollution discharge mechanism (automatic pollution discharge valve with filtering function) is an external purchase component, and has the advantages of small occupied space and high automation degree. The second filter and pollution discharge mechanism (embodiment two) and the third filter and pollution discharge mechanism (embodiment three) can conveniently wash and clean the filter screen, greatly shorten the filter screen replacement cycle, and have the advantages of simple structure, low cost, stable performance and pollution discharge function. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structural schematic diagram of the embodiment one of the utility model;

[0017] Figure 2 is the principle schematic diagram of the embodiment one of the utility model;

[0018] Figure 3 is the structural and principle schematic diagram of the filter and pollution discharge mechanism of the embodiment two of the utility model.

[0019] Figure 4 is the structural and principle schematic diagram of the filter and pollution discharge mechanism of the embodiment three of the utility model.

[0020] EXPLANATION OF REFERENCE NUMERALS: 1. Hydraulic oil tank; 2. Driving motor; 3. Hydraulic pump; 4. Safety valve; 5. Water-cooled heat exchanger; 6. Filter and pollution discharge mechanism; 61. Shell; 62. Spray head; 63. Spray nozzle; 64. Pollution discharge control valve; 65. Pressure gauge; 66. Main control valve; 67. Filter screen; 68. Cleaning water control valve; 7. Water return pipe; 8. Water inlet pipe; 9. Machine base; 10. Oil return pipe; 11. Water source in pit. DETAILED DESCRIPTION

[0021] The utility model will be described in detail in combination with the embodiments and drawings. Embodiment one

[0022] As Figure 1 and Figure 2The embodiment includes a base 9 and a hydraulic oil tank 1 installed on the base 9. The embodiment also includes a downhole water source 11. The base 9 is also provided with a water-cooled heat exchanger 5, a driving motor 2 and a hydraulic pump 3 driven by the driving motor 2. The inlet of the hydraulic pump 3 is connected to the bottom of the hydraulic oil tank 1 through a pipeline, the outlet is connected to the inlet of the tube pass of the water-cooled heat exchanger 5 through a pipeline, and the outlet of the tube pass of the water-cooled heat exchanger 5 is connected to the top of the hydraulic oil tank 1 through an oil return pipe 10. The inlet of the shell pass of the water-cooled heat exchanger 5 is connected to the downhole water source 11 through a water inlet pipe 8 and a water pump, and the outlet of the shell pass of the water-cooled heat exchanger 5 is connected to the downhole water source 11 through a water return pipe 7, which can also be connected to other downhole water supply containers.

[0023] The driving motor 2 drives the hydraulic pump 3 to work, and high-temperature hydraulic oil is pumped out of the hydraulic oil tank 1 and into the water-cooled heat exchanger 5, where it exchanges heat with low-temperature water from the downhole water source 11. After cooling, the hydraulic oil flows back into the hydraulic oil tank 1 through the oil return pipe 10.

[0024] In order to further improve the safety of the system, the hydraulic oil tank 1 is also connected to the outlet of the hydraulic pump 3 through a pipeline provided with a safety valve 4. The safety valve 4 is connected in parallel with the water-cooled heat exchanger 5, and when the outlet pressure of the hydraulic pump 3 is too high, the safety valve 4 automatically opens to return oil, preventing the outlet pressure of the hydraulic pump 3 from being too high and damaging the water-cooled heat exchanger 5.

[0025] Since the downhole water source in a mine often has poor cleanliness, the embodiment is provided with a filter and sewage discharge mechanism 6 on the water inlet pipe 8. In the embodiment, the filter and sewage discharge mechanism 6 is an automatic sewage valve with filtering function. With the help of the downhole water supply system power (i.e. the aforementioned water pump), the low-temperature water from the downhole water source 11 first enters the automatic sewage valve (which is always open), automatically filters out the residual silt and impurities in the water, and the low-temperature water after removing the impurities enters the water-cooled heat exchanger 5 to absorb heat and then reenters the downhole water source 11 through the water return pipe 7, or is supplied to the downhole production through the water return pipe 7.

[0026] Further, the embodiment also includes a hydraulic oil temperature sensor and a hydraulic oil level sensor (the two sensors are omitted in the drawing) built in the hydraulic oil tank 1. The embodiment further includes a controller connected to the hydraulic oil temperature sensor, the hydraulic oil level sensor and the driving motor 2 respectively. The control switch of the controller is installed in the cab of the crusher.

[0027] The hydraulic oil temperature sensor and hydraulic oil level sensor built in the hydraulic oil tank 1 are used to detect the real-time temperature and level data in the hydraulic oil tank 1 and transmit the data to the controller. When the hydraulic oil temperature sensor detects that the hydraulic oil temperature exceeds a certain value and the hydraulic oil level sensor detects that the level exceeds one third of the volume of the hydraulic oil tank 1, the system starts to work and performs auxiliary cooling. When the hydraulic oil temperature sensor detects that the hydraulic oil temperature returns to the normal value or the hydraulic oil level sensor detects that the level is less than one third of the volume of the hydraulic oil tank 1, the system stops running and the original cooling system performs cooling. Embodiment Two

[0028] The difference between this embodiment and embodiment one is that, as shown in Figure 3 , the filter and pollution discharge mechanism 6 includes a housing 61 as a filter container shell, and a filter screen 67 is installed in the housing 61 to divide the housing space into two parts. The front side in the housing space (i.e. the side before water filtration) and the rear side in the housing space (i.e. the side after water filtration) are connected in series on the water inlet pipe 8, and a pressure gauge 65 and a main control valve 66 are installed on the pipeline between the housing 61 and the downhole water source 11. The low-temperature water from the downhole water source 11 flows through the pipeline connected with the pressure gauge 65, enters the front side in the housing space, is filtered through the filter screen 67, and then enters the water-cooled heat exchanger 5 through the rear side in the housing space.

[0029] Further, a spray head 62 is installed at the rear side position in the housing space, and a plurality of nozzles 63 with a spraying direction towards the filter screen 67 are installed on the spray head 62. The spray head 62 is connected to the water inlet pipe 8 through a pipeline with a cleaning water control valve 68 installed thereon, and the connection position between the pipeline with the cleaning water control valve 68 installed thereon and the water inlet pipe 8 is located on the pipeline between the main control valve 66 and the downhole water source 11. The front side in the housing space is connected with a pollution discharge control valve 64.

[0030] Further, the spray head 62 is suspended at the rear side position in the housing space through a rigid pipeline connected to the cleaning water control valve 68, or as shown in Figure 3 , the spray head 62 is connected to the housing 61 through a support. Embodiment Three

[0031] The difference between this embodiment and embodiment two is that, as shown in Figure 4 , the spray head 62 is not provided, and the nozzles 63 are fixedly connected to the inner wall of the housing 61 and have a spraying direction towards the filter screen 67, and the water inlet end of the nozzles 63 is connected to the water inlet pipe 8 through a pipeline with a cleaning water control valve 68 installed thereon.

[0032] The controller of the second and third embodiments is also connected to the waste control valve 64, the pressure gauge 65, the main control valve 66 and the cleaning water control valve 68 respectively. When the controller detects that the pressure in the water inlet pipe 8 is too high through the pressure gauge 65, it proves that the filter screen 67 needs to be cleaned, the main control valve 66 is closed and the cleaning water control valve 68 and the waste control valve 64 are opened. With the help of the underground water supply system, low-temperature water from the underground water source 11 enters the nozzle 63, which sprays water to the back side of the filter screen 67 for cleaning, and the washed-out silt impurities are discharged from the system through the waste control valve 64. After cleaning, the cleaning water control valve 68 and the waste control valve 64 are closed, and the main control valve 66 is opened, and the system works normally.

Claims

1. A hydraulic oil cooling system applied to a downhole stationary hydraulic breaker, comprising a base (9) and a hydraulic oil tank (1) mounted on the base (9), further comprising a downhole water source (11), characterized in that: The machine base (9) is further provided with a water-cooled heat exchanger (5), a driving motor (2) and a hydraulic pump (3) driven by the driving motor (2); the liquid inlet end of the hydraulic pump (3) is connected with the hydraulic oil tank (1) through a pipeline, the liquid outlet end is connected with the tube side liquid inlet end of the water-cooled heat exchanger (5) through a pipeline, the tube side liquid outlet end of the water-cooled heat exchanger (5) is connected with the hydraulic oil tank (1) through an oil return pipe (10); the shell side water inlet end of the water-cooled heat exchanger (5) is connected with the downhole water source (11) through a water inlet pipe (8), and the shell side water outlet end of the water-cooled heat exchanger (5) is connected with a water return pipe (7); the water inlet pipe (8) is provided with a filtering and sewage discharge mechanism (6).

2. The hydraulic oil cooling system for a downhole stationary hydraulic rock breaker of claim 1, characterized in that: The filtering and sewage discharge mechanism (6) is an automatic sewage valve with filtering function.

3. The hydraulic oil cooling system for a downhole stationary hydraulic rock breaker of claim 1, wherein: The filtering and sewage discharge mechanism (6) comprises a shell (61) as a filtering container shell; a filter screen (67) is arranged in the shell (61) to divide the shell space into two parts; the front side in the shell space and the rear side in the shell space are connected in series on the water inlet pipe (8), and a pressure gauge (65) and a main control valve (66) are arranged on the pipeline between the shell (61) and the downhole water source (11); the front side in the shell space is connected with a sewage control valve (64); the filtering and sewage discharge mechanism (6) further comprises a nozzle (63) arranged in the rear side of the shell space and having a spraying direction towards the filter screen (67); the nozzle (63) is connected with the water inlet pipe (8) through a pipeline provided with a cleaning water control valve (68); the connection position between the pipeline provided with the cleaning water control valve (68) and the water inlet pipe (8) is located on the pipeline between the main control valve (66) and the downhole water source (11).

4. The hydraulic oil cooling system for a downhole stationary hydraulic rock breaker of claim 3, characterized in that: The nozzle (63) is arranged on a spray head (62), and the water inlet end of the spray head (62) is connected with the water inlet pipe (8) through the pipeline provided with the cleaning water control valve (68).

5. The hydraulic oil cooling system for a downhole stationary hydraulic rock breaker of claim 3, wherein: The nozzle (63) is fixedly connected to the inner wall of the shell (61).

6. The hydraulic oil cooling system for a downhole stationary hydraulic rock breaker according to any one of claims 1 to 5, characterized in that: The hydraulic oil tank (1) is connected with the liquid outlet end of the hydraulic pump (3) through a pipeline provided with a safety valve (4).

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