Constant-pressure centralized liquid supply system for fully mechanized coal mining face of coal mine

Abstract

The utility model provides a constant-pressure centralized liquid supply system for a fully mechanized coal mining face of a coal mine, which is timely and rapid in reaction and short in treatment time, and can always enable the emulsion concentration, the emulsion liquid level, the emulsion working pressure and the like to be in a normal range. A pure water tank (3), a pure water pump, an automatic liquid preparation tank (4), a mixed liquid pump, an emulsified liquid tank (5) and a liquid inlet of an emulsification pump (6) are sequentially communicated, a liquid outlet of the emulsification pump (6), a high-pressure filter station (7), a liquid supply station (8) and a liquid inlet of a hydraulic support (9) are sequentially communicated, and a liquid outlet of the hydraulic support (9), a liquid return filter station (10) and the emulsified liquid tank (5) are sequentially communicated. The emulsified concentrated oil supply pump is communicated with the automatic liquid preparation tank (4) through an emulsified concentrated oil supply pipe (17), concentration sensors (15) and liquid level sensors (14) are arranged in the automatic liquid preparation tank (4) and the emulsified liquid tank (5), and pressure sensors are arranged at a liquid outlet of the emulsifying pump (6) and a liquid inlet of the hydraulic support (9).

Description

Technical Field

[0001] The utility model relates to a constant-pressure centralized liquid supply system for fully-mechanized coal mining faces in coal mines, and is an intelligent constant-pressure centralized liquid supply system for intelligent fully-mechanized coal mining faces. Background Art

[0002] The fully-mechanized coal mining face in a coal mine is an important energy extraction work platform in China. With the continuous increase in global energy demand and the large-scale exploitation of coal resources, the technological development of fully-mechanized coal mining faces in coal mines has become particularly important.

[0003] The control operation of traditional fully-mechanized coal mining faces relies on manual control, which may lead to slow operation and low efficiency. Manual operation is difficult to achieve real-time monitoring and pressure control, and it is easy to make mistakes, increasing the risk of accidents. There are inherent problems in traditional liquid distribution systems for fully-mechanized coal mining faces, such as complex systems, difficult maintenance, low automation level, difficult water quality control, insufficient informatization level, and low energy efficiency. These problems may affect the efficiency and safety of coal mine production. The pump groups of traditional pumping stations are usually managed by their respective independent control systems, lacking unified coordinated scheduling. Manual operation is frequent, and the monitoring and operation of pumping stations mainly rely on manual labor. Due to the lack of centralized optimization control, the energy consumption of pumping stations may be relatively high, especially when the load increases, dynamic adjustment cannot be achieved to save energy. Moreover, the concentration, liquid level, etc. of emulsion also need to be manually supervised and controlled, with slow reaction time, long processing time, and poor real-time performance. Summary of the Invention

[0004] The purpose of the utility model is to provide a constant-pressure centralized liquid supply system for fully-mechanized coal mining faces in coal mines, which can timely and quickly adjust when the concentration of emulsion is lower than the normal value, so that the concentration of emulsion is maintained within the normal range.

[0005] To achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] Constant pressure centralized liquid supply system for fully mechanized coal mining face. The liquid inlets of pure water tank 3, pure water pump, automatic liquid mixing tank 4, mixed liquid pump, emulsion tank 5, and emulsion pump 6 are connected in sequence. The liquid outlet of emulsion pump 6, high-pressure filtration station 7, liquid supply station 8, and liquid inlet of hydraulic support 9 are connected in sequence. The liquid outlet of hydraulic support 9, return liquid filtration station 10, and emulsion tank 5 are connected in sequence. The emulsion concentrate oil supply pump is connected to automatic liquid mixing tank 4 through emulsion concentrate oil supply pipe 17. Concentration sensors 15 are installed in both automatic liquid mixing tank 4 and emulsion tank 5. The emulsion concentrate oil supply pump, mixed liquid pump, and concentration sensor 15 are electrically connected to central processing unit 13. When the concentration sensor 15 in emulsion tank 5 detects that the concentration of the emulsion in emulsion tank 5 is lower than the normal value, central processing unit 13 controls the emulsion concentrate oil supply pump to work, and adds emulsion concentrate oil into automatic liquid mixing tank 4 through emulsion concentrate oil supply pipe 17; and controls the mixed liquid pump to work, and sends the mixed liquid of pure water and emulsion concentrate oil in automatic liquid mixing tank 4 into emulsion tank 5.

[0007] For the above constant pressure centralized liquid supply system for fully mechanized coal mining face, when the concentration sensor 15 in automatic liquid mixing tank 4 detects that the concentration of the mixed liquid in automatic liquid mixing tank 4 is lower than the set value, central processing unit 13 controls the emulsion concentrate oil supply pump to work, and adds emulsion concentrate oil into automatic liquid mixing tank 4 through emulsion concentrate oil supply pipe 17.

[0008] For the above constant pressure centralized liquid supply system for fully mechanized coal mining face, liquid level sensors 14 are installed in both automatic liquid mixing tank 4 and emulsion tank 5. The liquid level sensors 14 are electrically connected to central processing unit 13. When the liquid level sensor 14 in emulsion tank 5 detects that the liquid level of the emulsion in emulsion tank 5 is lower than the normal value, central processing unit 13 controls the mixed liquid pump to work, and sends the mixed liquid of pure water and emulsion concentrate oil in automatic liquid mixing tank 4 into emulsion tank 5.

[0009] For the above constant pressure centralized liquid supply system for fully mechanized coal mining face, the pure water pump is electrically connected to central processing unit 13. When the liquid level sensor 14 in automatic liquid mixing tank 4 detects that the liquid level of the mixed liquid in automatic liquid mixing tank 4 is lower than the set value, central processing unit 13 controls the pure water pump and the emulsion concentrate oil supply pump to work, and sends emulsion concentrate oil and pure water in pure water tank 3 into automatic liquid mixing tank 4.

[0010] For the above constant pressure centralized liquid supply system for fully mechanized coal mining face, pressure sensors are installed at the liquid outlet of emulsion pump 6 and the liquid inlet of hydraulic support 9. The pressure sensors are electrically connected to central processing unit 13. Emulsion pump 6 has a servo motor for driving the pump group, and the frequency converter of the servo motor is electrically connected to central processing unit 13. When the pressure at the liquid outlet of emulsion pump 6 or the liquid inlet of hydraulic support 9 is lower or higher than the normal value, central processing unit 13 changes the speed of the servo motor by adjusting the frequency converter, so that the pressures at the liquid outlet of emulsion pump 6 and the liquid inlet of hydraulic support 9 are maintained at the normal value.

[0011] In the above-mentioned constant-pressure centralized liquid supply system for fully-mechanized coal mining face, the raw water supply pipe 12, the inlet filtration station 1, the reverse osmosis water treatment equipment 2, and the pure water tank 3 are connected in sequence.

[0012] The beneficial effects of the present utility model are as follows: The concentration sensor 15 in the emulsion tank 5 detects the concentration of the emulsion in real time and feeds it back to the central processing unit 13 for processing. Once the concentration of the emulsion is lower than the normal value, the emulsion concentrate oil supply pump operates, and emulsion concentrate oil is added into the automatic liquid mixing tank 4 through the emulsion concentrate oil supply pipe; at the same time or afterwards, the mixed liquid pump is controlled to operate, and the mixed liquid of pure water and emulsion concentrate oil in the automatic liquid mixing tank 4 is sent into the emulsion tank, so as to timely increase the concentration of the emulsion.

[0013] The concentration sensor 15 in the automatic liquid mixing tank 4 detects the concentration of the mixed liquid and feeds it back to the central processing unit 13 for processing. When the concentration of the mixed liquid is lower than the set value, the emulsion concentrate oil supply pump operates, and emulsion concentrate oil is added into the automatic liquid mixing tank 4 through the emulsion concentrate oil supply pipe 17, so as to ensure that the concentration of the mixed liquid is always within the set range.

[0014] The liquid level sensor 14 in the emulsion tank 5 detects the level of the emulsion in the emulsion tank 5 in real time and feeds it back to the central processing unit 13 for processing. When the liquid level of the emulsion is lower than the normal value, the mixed liquid pump operates, and the mixed liquid of pure water and emulsion concentrate oil in the automatic liquid mixing tank 4 is sent into the emulsion tank 5.

[0015] The liquid level sensor 14 in the automatic liquid mixing tank 4 detects the level of the mixed liquid in the automatic liquid mixing tank 4 in real time and feeds it back to the central processing unit 13 for processing. When the liquid level of the mixed liquid is lower than the set value, the pure water pump and the emulsion concentrate oil supply pump operate, and pure water and emulsion concentrate oil are sent into the automatic liquid mixing tank 4.

[0016] The pressure sensor at the liquid outlet of the emulsion pump 6 detects the emulsion pressure at the liquid outlet of the emulsion pump 6 in real time, and the pressure sensor at the liquid inlet of the hydraulic support 9 detects the emulsion pressure at the liquid inlet of the hydraulic support 9 in real time and feeds it back to be electrically connected to the central processing unit 13. When the pressure at the liquid outlet of the emulsion pump 6 or the pressure at the liquid inlet of the hydraulic support 9 is lower than the normal value, the rotational speed of the servo motor increases, and the rotational speed of the pump group increases, so that the working pressure of the emulsion increases. When the pressure at the liquid outlet of the emulsion pump 6 or the pressure at the liquid inlet of the hydraulic support 9 is higher than the normal value, the rotational speed of the servo motor decreases, and the rotational speed of the pump group decreases, so that the working pressure of the emulsion decreases. In short, by adjusting the rotational speed of the pump group, the working pressure is always maintained at a constant pressure state.

[0017] This system responds quickly and promptly, and the processing time is fast. It can always keep the emulsion concentration, emulsion liquid level, emulsion working pressure, etc. within the normal range. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of a constant-pressure centralized liquid supply system for a fully mechanized coal mining face.

[0019] In the figure, 1 is an automatic backwashing inlet filtration station, 2 is a reverse osmosis water treatment device, 3 is a pure water tank, 4 is an automatic liquid preparation tank, 5 is an emulsion tank, 6 is an emulsion pump, 7 is a high-pressure backwashing filtration station, 8 is a liquid supply station, 9 is a hydraulic support, 10 is an automatic backwashing return liquid filtration station, 11 is a frequency converter, 12 is a raw water supply pipe, 13 is a central processing unit, 14 is a liquid level sensor, 15 is a concentration sensor, 16 is a pressure sensor, and 17 is an emulsion concentrate oil supply pipe. Specific embodiments

[0020] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings:

[0021] As Figure 1 shown in the schematic diagram of the constant-pressure centralized liquid supply system for the fully mechanized coal mining face, the raw water supply pipe 12 is connected to the inlet end of the automatic inlet backwashing filtration station 1, the outlet end of the automatic inlet backwashing filtration station 1 is connected to the reverse osmosis water treatment device 2, the reverse osmosis water treatment device 2 is connected to the pure water tank 3, the pure water tank 3 is connected to the automatic liquid preparation tank 4 through a pure water pump, the emulsion concentrate oil supply pipe 17 is connected to the automatic liquid preparation tank 4, the automatic liquid preparation tank 4 is internally equipped with a liquid level sensor 14 and a concentration sensor 15, the automatic liquid preparation tank 4 is connected to the emulsion tank 5 through a mixing liquid pump, the emulsion tank is internally equipped with a liquid level sensor 14 and a concentration sensor 15, the emulsion tank 5 is connected to the inlet of the emulsion pump 6, the outlet of the emulsion pump 6 is connected to the high-pressure backwashing filtration station 7, a pressure sensor 16 is installed between the connecting pipeline of the emulsion pump 6 and the high-pressure backwashing filtration station 7, the high-pressure backwashing filtration station 7 is connected to the liquid supply station 8, the liquid supply station 8 is connected to the hydraulic support 9, a pressure sensor 16 is installed at one end close to the hydraulic support between the connecting pipeline of the liquid supply station 8 and the hydraulic support 9, the hydraulic support 9 is connected to the automatic backwashing return liquid filtration station 10, a pressure sensor 16 is installed at one end close to the hydraulic support 9 between the connecting pipeline of the hydraulic support 9 and the automatic backwashing return liquid filtration station 10, the automatic backwashing return liquid filtration station 10 is connected to the emulsion tank 5, and the central processing unit 13 adjusts and monitors various data in real time during the operation of the pump station.

[0022] The present invention realizes the centralization, intelligentization, and high efficiency of the constant-pressure centralized liquid supply system for the fully mechanized coal mining face.

[0023] Intelligent control: The control system installs a variety of sensors at key positions, such as pressure sensors, temperature sensors, etc. The pressure sensor is installed at the key nodes of the pipeline to monitor the fluid flow rate and pressure in the pipeline. The temperature sensor is located inside the equipment to monitor the lubricating oil temperature and water temperature. The sensors transmit the collected data to the central processing unit in the control room by wire, and then adjust the speed of the pump group through the frequency converter to always maintain the pressure in a constant pressure state. When the working face does not require a large flow of liquid, on the premise that the overflow pressure is reduced, that is, the working pressure of the pump remains unchanged during overflow, the output power of the pump decreases proportionally. The pump group maintains a lower speed on the premise of ensuring the motor heat dissipation and the piston pump. When there is no change within three minutes, it automatically switches to the monitoring standby state. When the system pressure of the working face is lower than the set value, the pump group quickly switches back to the constant pressure liquid supply state. When the working face requires a large amount of liquid, the non-working pump group quickly starts through the automatic control device for pressure compensation, and automatically stops when the system pressure is satisfied. By integrating advanced sensing technology, data processing capabilities and intelligent control, the control system is more accurate, not only improving production efficiency and safety, but also greatly reducing manpower and power consumption.

[0024] Intelligent liquid preparation system: A series of sensors are deployed inside the liquid preparation system, including liquid level sensors, concentration sensors, temperature sensors, etc., which are used to monitor key parameters in the liquid preparation process in real time. The data collected by the sensors is transmitted to the central processing unit in the control room through high-speed data lines. When the concentration of the emulsion in the emulsion tank does not reach the specified standard range of 3%-5%, the system automatically extracts the emulsion concentrate for ratio correction. Operators can remotely monitor the system status through the remote terminal and perform remote operation intervention to improve the flexibility and controllability of the system, and achieve precise control and optimized management of the liquid preparation process.

[0025] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope of the present utility model is subject to the claims. Any substitutions, deformations, and improvements that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.

Claims

1. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face, where the pure water tank (3), pure water pump, automatic liquid mixing tank (4), mixed liquid pump, emulsion tank (5), and the inlet of the emulsion pump (6) are connected in sequence. The outlet of the emulsion pump (6), high-pressure filtration station (7), liquid supply station (8), and the inlet of the hydraulic support (9) are connected in sequence. The outlet of the hydraulic support (9), return liquid filtration station (10), and emulsion tank (5) are connected in sequence. The emulsion concentrate oil supply pump is connected to the automatic liquid mixing tank (4) through the emulsion concentrate oil supply pipe (17). It is characterized in that: at Concentration sensors (15) are provided both inside the automatic liquid dispensing tank (4) and inside the emulsion liquid tank (5). The emulsion concentrated oil supply pump, the mixed liquid pump, and the concentration sensors (15) are electrically connected to the central processing unit (13). When the concentration sensor (15) inside the emulsion liquid tank (5) detects that the concentration of the emulsion liquid in the emulsion liquid tank (5) is lower than the normal value, the central processing unit (13) controls the operation of the emulsion concentrated oil supply pump, and adds emulsion concentrated oil into the automatic liquid dispensing tank (4) through the emulsion concentrated oil supply pipe (17); and controls the operation of the mixed liquid pump to send the mixed liquid of pure water and emulsion concentrated oil in the automatic liquid dispensing tank (4) into the emulsion liquid tank (5).

2. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face according to claim 1, wherein: When the concentration sensor (15) inside the automatic liquid dispensing tank (4) detects that the concentration of the mixed liquid in the automatic liquid dispensing tank (4) is lower than the set value, the central processing unit (13) controls the operation of the emulsion concentrated oil supply pump, and adds emulsion concentrated oil into the automatic liquid dispensing tank (4) through the emulsion concentrated oil supply pipe (17).

3. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face according to claim 1, characterized in that: at Liquid level sensors (14) are provided both inside the automatic liquid dispensing tank (4) and inside the emulsion liquid tank (5). The liquid level sensors (14) are electrically connected to the central processing unit (13). When the liquid level sensor (14) inside the emulsion liquid tank (5) detects that the liquid level of the emulsion liquid in the emulsion liquid tank (5) is lower than the normal value, the central processing unit (13) controls the operation of the mixed liquid pump to send the mixed liquid of pure water and emulsion concentrated oil in the automatic liquid dispensing tank (4) into the emulsion liquid tank (5).

4. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face according to claim 3, characterized in that: The pure water pump is electrically connected to the central processing unit (13). When the liquid level sensor (14) inside the automatic liquid dispensing tank (4) detects that the liquid level of the mixed liquid in the automatic liquid dispensing tank (4) is lower than the set value, the central processing unit (13) controls the operation of the pure water pump and the emulsion concentrated oil supply pump to send the emulsion concentrated oil and the pure water in the pure water tank (3) into the automatic liquid dispensing tank (4).

5. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face according to claim 1, characterized in that: Pressure sensors are provided at the liquid outlet of the emulsion pump (6) and the liquid inlet of the hydraulic support (9). The pressure sensors are electrically connected to the central processing unit (13). The emulsion pump (6) has a servo motor for driving the pump set, and the frequency converter of the servo motor is electrically connected to the central processing unit (13). When the pressure at the liquid outlet of the emulsion pump (6) or the liquid inlet of the hydraulic support (9) is lower or higher than the normal value, the central processing unit (13) changes the speed of the servo motor by adjusting the frequency converter, so that the pressures at the liquid outlet of the emulsion pump (6) and the liquid inlet of the hydraulic support (9) are maintained at the normal value.

6. The constant-pressure centralized liquid supply system for fully-mechanized coal mining face according to claim 1, characterized in that: The raw water supply pipe (12), the inlet water filtration station (1), the reverse osmosis water treatment equipment (2), and the pure water tank (3) are connected in sequence.

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