A dust removal system for a fully mechanized coal mining face

Abstract

The present application provides a kind of coal mine fully mechanized working face dust removal system, comprising: hydraulic transmission subsystem, air power subsystem, liquid storage subsystem, liquid discharge subsystem, control subsystem.Control subsystem senses and controls hydraulic transmission subsystem, uses liquid medium to drive hydraulic motor to drive fan rotation, fan generates negative pressure and inhales working face dust into liquid storage tank, reaches pressurized dissolved gas, atomization dust removal effect;Control subsystem senses and controls liquid discharge subsystem, uses hydraulic motor to drive liquid discharge pump rotation, discharges medium for dust removal, achieves the effect of replacing medium, cleaning container and secondary dust removal;Control subsystem senses and controls the medium for dust removal into liquid storage subsystem.Control subsystem uses the existing equipment of fully mechanized working face, senses working face environment and equipment operating parameters, realizes single or group control system automatic dust removal.The present application has simple structure, easy installation, no risk of explosion, automatic control and high dust removal efficiency.

Description

Technical Field

[0001] This invention relates to the field of intelligent dust removal technology in mines, and in particular to a dust removal system for fully mechanized coal mining faces. Background Technology

[0002] Underground coal mines generate large amounts of suspended dust due to mining activities and limited ventilation. Fully mechanized mining faces, with their high dust intensity and large working spaces, are among the most vulnerable areas for dust hazards. Fully mechanized mining faces employ mechanical coal breaking and loading processes. When the coal cutting machine and hydraulic support shifting are operating simultaneously, dust concentrations can reach 500–850 mg / m³, and respirable dust concentrations can reach 300–500 mg / m³. This severely impacts safe production in coal mines, hinders the effective use of intelligent equipment, and seriously threatens the occupational health of workers.

[0003] In response to the challenges posed by dust control at fully mechanized mining faces, and the higher standards for dust control imposed by intelligent coal mining, most coal mines currently employ high-pressure water spraying via coal mining machines and hydraulic supports for dust suppression. This method is effective in reducing coarse dust particles. However, a large amount of fine dust remains suspended in the upper space of the working face area, spreading with the airflow into the return airway. This dust is difficult to settle and poses a health hazard to personnel in the working area. Simultaneously, high dust concentrations affect the video recording capabilities of the working face, rendering video AI dust removal technology ineffective. This results in remote operators being unable to see clearly, hindering the routine operation of intelligent systems to remotely cut coal, push conveyors, and pull supports. Consequently, intelligent equipment cannot effectively reduce manpower and improve efficiency. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a dust removal system for fully mechanized mining faces.

[0005] This invention provides a dust removal system for a fully mechanized coal mining face, comprising: a hydraulic transmission subsystem, an aerodynamic subsystem, a liquid inlet and storage subsystem, a liquid outlet subsystem, and a control subsystem;

[0006] The hydraulic transmission subsystem includes: a hydraulic motor 4, a gearbox 17, a clutch 5, hydraulic lines 6, a pressure regulating valve 7, a proportional valve 16, and a rotating shaft 19. This subsystem provides the power required by the dust removal system of the fully mechanized coal mining face. The power input to the hydraulic motor 4 is provided by the liquid medium in the hydraulic lines 6, and its pressure and flow rate are automatically or manually adjusted by the pressure regulating valve 7 and the proportional valve 16. The hydraulic motor 4 outputs the torque and speed required by the dust removal system of the fully mechanized coal mining face through the gearbox 17, the clutch 5, and the rotating shaft 19.

[0007] The aerodynamic subsystem includes: a wind-gathering hood 8, a fan 3, an air inlet pipe 9, a filter screen 10, and an air outlet 11. The aerodynamic subsystem is used to use the power provided by the hydraulic transmission subsystem to draw in dust-containing gas, draw the dust-containing gas into the liquid storage subsystem, and press the filtered clean gas out of the coal mine fully mechanized mining face dust removal system, so that the clean gas enters the working face circulating airflow.

[0008] The liquid storage subsystem includes: a liquid storage tank 1, a liquid inlet pipeline 2, and a liquid inlet 20. The liquid storage subsystem is used to store filter media and to filter the dust-containing gas using the filter media.

[0009] The drainage subsystem includes a drainage pump 13, a drainage pipeline 14, and an atomizing nozzle 15. The drainage subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering the dust-containing gas in the storage tank 1.

[0010] The control subsystem includes: a control device 21, a hydraulic support controller 22, a main valve 23, a solenoid valve 24, and a sensor 12. The control subsystem is used to sense the status of the dust removal system of the fully mechanized coal mining face and to automatically control the dust removal of the fully mechanized coal mining face dust removal system.

[0011] Optionally, multiple dust removal systems for fully mechanized coal mining faces are respectively installed under the top beam of the hydraulic support of the fully mechanized coal mining face, above the coal mining machine and the scraper conveyor;

[0012] Depending on the dust concentration at the working face, multiple dust removal systems at the coal mine fully mechanized mining face can be automatically turned on and off individually, or multiple systems can be automatically turned on and off simultaneously.

[0013] Optionally, the first end of the hydraulic motor 4 is connected to the main valve 23 through the hydraulic pipeline 6, and the second end is fixedly connected to the first end of the rotating shaft 19. The main valve 23 controls the power output, closing and reversing of the liquid medium, thereby controlling the start, stop and forward / reverse rotation of the hydraulic motor 4.

[0014] The liquid medium includes: water-based lubricants and oil-based lubricants;

[0015] The pressure regulating valve 7 and the proportional valve 16 are mounted on the hydraulic pipeline 6. The proportional valve 16 controls the speed of the hydraulic motor 4, and the pressure regulating valve 7 controls the torque of the hydraulic motor 4.

[0016] The transmission 17 and the clutch 5 are mounted on the rotating shaft 19, and the rotating shaft 19 is controlled to rotate forward, reverse, and stop by the hydraulic motor 4.

[0017] Optionally, the aerodynamic subsystem further includes: a filter 18;

[0018] The filter screen 18 is installed at the air inlet end of the wind-gathering hood 8. The wind-gathering hood 8 is adjusted to face the opposite direction of the airflow direction of the fully mechanized mining face, with an included angle of 0° to 30°. The wind-gathering hood 8 is configured to be cleaned by washing with water or air.

[0019] The fan 3 is connected to the second end of the rotating shaft 19, and draws dust-containing gas into the liquid storage subsystem through the air inlet pipe 9;

[0020] The fan 3 has a built-in one-way bearing and is configured to rotate in one direction. The fan 3 works when the rotating shaft 19 rotates in the forward direction.

[0021] The filter screen 10 is installed at the port where the air inlet pipe 9 extends into the liquid storage tank 1;

[0022] The air outlet 11 is installed on the upper part of the liquid storage tank 1.

[0023] Optionally, the fan 3 has a pressurization function, and uses the high pressure difference generated by the rotation of the fan (3) to pre-filter the dust-containing gas through the wind-collecting hood 8 and the filter screen 18 and then draw it into the liquid storage tank 1;

[0024] The vent 11 is configured to be in a sealed state under natural conditions and when the pressure in the liquid storage tank (1) is lower than the external pressure;

[0025] The clean gas is discharged into the working face circulating airflow by opening the air outlet 11 using the pressure difference, without disturbing the working face ventilation system.

[0026] Optionally, the liquid inlet 20 is connected to the solenoid valve 24 through the liquid inlet pipe 2, and the solenoid valve 24 provides the filter medium, which includes: water and biofilm dust suppressant;

[0027] The storage tank 1 stores the filter medium. The dust-containing gas is blown into the filter medium and filtered using the filter medium to obtain the clean gas.

[0028] Optionally, the second end of the rotating shaft 19 is also connected to the first end of the drain pump 13, and the second end of the drain pump 13 is connected to the drain pipe 14;

[0029] The drain pump 13 has a built-in one-way bearing and is configured to rotate in one direction. The drain pump 13 works when the rotating shaft 19 reverses.

[0030] The pipeline of the drainage pump 13 is connected to the drainage pipeline 14 and the atomizing nozzle 15;

[0031] The drain pump 13 is used to extract the turbid liquid and pressurize and spray it out through the drain pipe 14 and the atomizing nozzle 15. The sprayed turbid liquid is configured to perform secondary dust suppression on the working surface environment.

[0032] The drainage subsystem, in conjunction with the aerodynamic subsystem, enables pressurized gas dissolution, atomized dust removal, and prevention of sludge deposition and scale formation in the liquid storage tank 1.

[0033] Optionally, the hydraulic support controller 22 is connected to the main valve 23 and the solenoid valve 24 respectively, and the hydraulic support controller 22 is used to provide human-machine interaction and remote control functions for the dust removal system of the coal mine fully mechanized mining face;

[0034] The sensor 12 is installed inside the liquid storage tank 1 and is connected to the hydraulic support controller 22. The hydraulic support controller 22 senses the parameters of the liquid storage tank 1 through the sensor 12.

[0035] Optionally, the hydraulic support controller 22 includes: a sensing unit and a control unit, wherein the sensing unit senses the dust concentration at the fully mechanized mining face and the operating parameters of the coal mining machine, hydraulic support, and scraper conveyor, as well as senses the liquid level, temperature, turbidity, water quality, or liquid quality of the storage tank 1;

[0036] The control unit controls the opening, closing and reversing of the main valve 23, the opening and closing of the solenoid valve 24, and the opening degree of the proportional valve 16.

[0037] The control device 21 is used to manage and configure the parameters of one or more hydraulic support controllers 22, centrally display the operation and alarm status of the dust removal system of the fully mechanized coal mining face, and provide a human-machine interface to realize the dust removal method, parameter setting and remote connection of the hydraulic support controller 22 of the fully mechanized coal mining face.

[0038] Optionally, the dust removal method for the fully mechanized coal mining face includes:

[0039] Step S1: The sensing unit continuously and cyclically judges the dust concentration at the fully mechanized mining working surface;

[0040] Step S2: When the dust concentration at the fully mechanized mining face exceeds the set value of the control device 21 or the hydraulic support controller 22, the hydraulic support controller 22 uses the sensor 12 to detect it;

[0041] Step S3: Detect whether the liquid level of the filter medium in the storage tank 1 has reached the set height. If it has reached the height, proceed to step S4. If it has not reached the height, continuously replenish the liquid to the set height using the solenoid valve 24, the liquid inlet pipe 2, and the liquid inlet 20, and then proceed to step S4.

[0042] Step S4: The control unit opens the main valve 23 switch, and the liquid medium drives the hydraulic motor 4 to rotate in the forward direction and speed through the hydraulic pipeline 6;

[0043] Step S5: The hydraulic motor 4 drives the rotating shaft 19 to rotate in the forward direction through the transmission 17 and the clutch 5, which in turn drives the fan 3 to rotate, generating negative pressure. The dust-containing gas is then drawn into the liquid storage tank 1 through the filter screen 18, the wind shroud 8, and the air intake pipe 9.

[0044] Step S6: The liquid storage tank 1 filters the dust-containing gas using the filter medium to obtain the clean gas, and discharges the clean gas from the liquid storage tank 1 through the air outlet 11 and enters the working face circulating airflow;

[0045] Step S7: When the sensing unit detects that the turbidity of the liquid in the storage tank 1 exceeds the set upper limit, the control unit opens the reversing switch of the main valve 23, drives the hydraulic motor 4 to rotate in the opposite direction and speed according to the set direction, and links the drain pump 13 to draw out the turbid liquid in the storage tank 1, and discharges it from the system through the drain pipe 14 and the atomizing nozzle 15. When the liquid level in the storage tank 1 reaches the set lower limit, the discharge stops.

[0046] Step S8: The control unit opens the solenoid valve 24 and introduces fresh filter medium for filtration into the storage tank 1 through the liquid inlet pipe 2 until the liquid level in the storage tank (1) reaches the set upper limit and then closes the solenoid valve 24.

[0047] Step S9: Repeat step S1;

[0048] Step S10: When the dust concentration at the fully mechanized mining face is lower than the set value of the control device 21 or the hydraulic support controller 22, the control unit closes the channel corresponding to the main valve 23, stops driving the hydraulic motor 4, and proceeds to step S1.

[0049] The dust removal system for fully mechanized coal mining faces provided by this invention includes a hydraulic transmission subsystem for providing the power required by the dust removal system. The power input of the hydraulic motor 4 is provided by the liquid medium in the hydraulic pipeline 6, and its pressure and flow rate are automatically or manually adjusted by the pressure regulating valve 7 and the proportional valve 16. The hydraulic motor 4 outputs the torque and speed required by the dust removal system for the fully mechanized coal mining faces through the transmission 17, the clutch 5, and the rotating shaft 19.

[0050] The aerodynamic subsystem uses power provided by the hydraulic transmission subsystem to draw in dust-laden gas, draws the dust-laden gas into the liquid inlet and storage subsystem, and then forces the filtered clean gas out of the coal mine longwall face dust removal system, allowing the clean gas to enter the circulating airflow at the working face. The liquid inlet and storage subsystem stores the filter media and uses the filter media to filter the dust-laden gas.

[0051] The liquid discharge subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering dust-containing gas from the liquid storage tank 1; the control subsystem is used to sense the status of the dust removal system in the fully mechanized coal mining face and to automatically control the dust removal of the fully mechanized coal mining face dust removal system.

[0052] This invention creatively proposes a novel dust removal system for fully mechanized coal mining faces. Building upon traditional dust removal equipment and technologies that use spraying to suppress coarse dust from the coal mining machine drums and hydraulic support components, this system specifically targets and removes fine dust particles suspended in the upper part of the mining area. Furthermore, because the cleaned gas is reintroduced into the working face's circulating airflow, a larger ventilation volume can be set while still meeting safety regulations. Since no high-power motor is required, there is no risk of explosion. The system fully utilizes the hydraulic support's fluid supply system as a power source, and a dust removal control system is built using a hydraulic support controller, main valve, solenoid valve, and sensors. Pressurized dissolved gas and atomization methods are employed to improve dust removal efficiency, and a hydraulic drive reduces the risk of explosion from the working face equipment. The entire system is simple in structure, easy to install, has no risk of explosion, features automatic control, and high dust removal efficiency, making it highly practical. Attached Figure Description

[0053] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0054] Figure 1 This is a front view of the dust removal system for a fully mechanized coal mining face according to an embodiment of the present invention;

[0055] Figure 2 This is a rear view of the dust removal system for a fully mechanized coal mining face according to an embodiment of the present invention;

[0056] Figure 3 This is a right view of a dust removal system installed under the top beam of the hydraulic support of a fully mechanized coal mining face in an embodiment of the present invention.

[0057] Figure 4 This is a left view of a dust removal system installed under the top beam of the hydraulic support of a fully mechanized coal mining face in an embodiment of the present invention.

[0058] Figure 5 This is a front view of a dust removal system installed under the top beam of the hydraulic support of a fully mechanized coal mining face in an embodiment of the present invention.

[0059] Figure 6 This is a flowchart outlining the control process of the dust removal system in a fully mechanized coal mining face, as described in this invention. Detailed Implementation

[0060] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention, and are only some, not all, embodiments of the present invention, and are not intended to limit the present invention.

[0061] The inventors discovered that traditional dust suppression methods are effective at reducing coarse dust particles, but less effective at removing the large amount of fine dust particles present in the working area. The main problems are as follows:

[0062] (1) Most of the existing dust removal equipment and technologies are designed to spray dust on the coarse dust of the coal mining machine drum and hydraulic support column lowering and moving accessories in the fully mechanized mining face, but lack equipment and technology to treat fine dust floating in the upper space of the mining area.

[0063] (2) Because the ventilation volume of the longwall mining face cannot be dynamically adjusted, the dust diffusion speed is slow. Under the condition that the ventilation volume of the working face meets the requirements of the safety regulations, it is not advisable to set it too high. A large ventilation volume can easily cause spontaneous combustion in the goaf.

[0064] (3) Some fully mechanized mining faces have negative pressure dust removal fans installed in the return air roadway. They adopt negative pressure wet dust removal technology, which is driven by a high-power motor. The dust concentration in the gas is reduced by spraying and filtering. The dust removal effect is not obvious and it does not play a role in dust reduction inside the mining area of ​​the fully mechanized mining face. Furthermore, the negative pressure dust removal fans installed in the return air roadway pose a safety hazard of explosion failure.

[0065] (4) The fully mechanized mining face has a complete and sufficient hydraulic power and control system. However, it has not been considered to make full use of the hydraulic support's liquid supply system as a power source, or to build a dust removal control system using hydraulic support controllers, main valves, solenoid valves, and sensors. It has not been considered to use pressurized dissolved gas and atomization methods to improve dust removal efficiency. It has not been considered to use hydraulic drive to reduce the risk of explosion failure of the working face equipment.

[0066] To address the aforementioned problems, the inventors have creatively proposed a dust removal system for fully mechanized coal mining faces. The technical solution proposed in this invention will be explained and described in detail below.

[0067] The dust removal system for fully mechanized coal mining faces proposed in this invention includes: a hydraulic transmission subsystem, an aerodynamic subsystem, a liquid inlet and storage subsystem, a liquid outlet subsystem, and a control subsystem. (Refer to...) Figure 1 The diagram shows a front view of a dust removal system for a fully mechanized coal mining face according to an embodiment of the present invention. (Refer to...) Figure 2 The image shows a rear view of a dust removal system for a fully mechanized coal mining face according to an embodiment of the present invention.

[0068] The hydraulic transmission subsystem includes: a hydraulic motor 4, a gearbox 17, a clutch 5, hydraulic lines 6, a pressure regulating valve 7, a proportional valve 16, and a rotating shaft 19. The hydraulic transmission subsystem is used to provide the power required by the dust removal system of the fully mechanized coal mining face. The power input of the hydraulic motor 4 is provided by the liquid medium in the hydraulic lines 6, and its pressure and flow rate are automatically or manually adjusted by the pressure regulating valve 7 and the proportional valve 16. The hydraulic motor 4 outputs the torque and speed required by the dust removal system of the fully mechanized coal mining face through the gearbox 17, the clutch 5, and the rotating shaft 19.

[0069] Specifically: The first end of the hydraulic motor 4 is connected to the main valve 23 via the hydraulic line 6. Figure 3 , 4 (As shown in the figure) The second end is fixedly connected to the first end of the rotating shaft 19. The main valve 23 controls the power output, closing and reversing of the liquid medium, thereby controlling the start, stop and forward and reverse rotation of the hydraulic motor 4. The liquid medium includes water-based lubricants, oil-based lubricants, etc. These liquid media have the characteristics of low cost, non-toxicity, corrosion prevention, rust prevention, non-irritation, biodegradability and no pollution to the environment.

[0070] The pressure regulating valve 7 and the proportional valve 16 are mounted on the hydraulic line 6. The proportional valve 16 controls the speed of the hydraulic motor 4, and the pressure regulating valve 7 controls the torque of the hydraulic motor 4. The gearbox 17 and the clutch 5 are mounted on the rotating shaft 19. The hydraulic motor 4 controls the forward and reverse rotation and stops the rotation of the rotating shaft 19.

[0071] The aerodynamic subsystem includes: a wind-collecting hood 8, a fan 3, an air inlet pipe 9, a filter 10, and an air outlet 11. The aerodynamic subsystem utilizes power provided by the hydraulic transmission subsystem to draw in dust-laden gas, draws the dust-laden gas into the liquid storage subsystem, and then forces the filtered clean gas out of the coal mine's fully mechanized mining face dust removal system, allowing the clean gas to enter the circulating airflow at the working face. The aerodynamic subsystem features pressurized dissolved air, atomized dust removal, and prevention of sludge deposition and scale formation in the liquid storage tank 1.

[0072] Preferably, the aerodynamic subsystem also includes: a filter screen 18; the filter screen 18 is installed at the air inlet end of the wind concentrator 8, the wind concentrator 8 is adjusted to face the opposite direction of the airflow direction of the fully mechanized mining face, with an angle of 0° to 30°, and the wind concentrator 8 is configured to be cleaned by washing with water or air.

[0073] The blower 3 is connected to the second end of the rotating shaft 19 and draws dust-containing gas into the liquid storage subsystem through the air intake pipe 9. The blower 3 has a built-in one-way bearing and is configured to rotate in one direction, that is, the blower 3 can only rotate in one direction. The blower 3 works when the rotating shaft 19 rotates in the forward direction. The filter screen 10 is installed at the port of the air intake pipe 9 that extends into the liquid storage tank (1). The air outlet 11 is installed on the upper part of the liquid storage tank 1.

[0074] The blower 3 also has a pressurization function. Utilizing the high pressure difference generated by the rotation of the blower 3, dust-laden gas can be preliminarily filtered through the wind-collecting hood 8 and the filter screen 18 and then drawn into the liquid storage tank 1. The outlet 11 is configured to be in a sealed state under natural conditions and when the pressure in the liquid storage tank 1 is lower than the external pressure. This prevents unclean gas from being discharged into the circulating airflow at the working face, while clean gas is discharged into the circulating airflow at the working face by opening the outlet 11 using the pressure difference, without disturbing the ventilation system at the working face.

[0075] The liquid inlet subsystem includes: a liquid storage tank 1, a liquid inlet pipeline 2, and a liquid inlet 20. The liquid inlet subsystem is used to store filter media and to filter dust-containing gases using the filter media.

[0076] Specifically: Inlet 20 is connected to solenoid valve 24 via inlet pipe 2. Figure 3 , 4 (As shown in the diagram) The connection is provided by solenoid valve 24, which provides filter media including water, biofilm dust suppressant, etc. The filter media has the characteristics of strong adsorption capacity for fine particulate dust, non-toxicity, non-irritation, degradability, low cost and no pollution to the environment.

[0077] The storage tank 1 stores the filter medium (preferably stored in the lower middle part of the storage tank 1). When dust-containing gas is blown into the filter medium, it is filtered by the filter medium to obtain clean gas.

[0078] The drainage subsystem includes a drainage pump 13, a drainage pipeline 14, and an atomizing nozzle 15. The drainage subsystem is used to extract, pressurize, and atomize the turbid liquid containing dust gas after filtration in the storage tank 1.

[0079] Specifically, the second end of the rotating shaft 19 is also connected to the first end of the drain pump 13, and the second end of the drain pump 13 is connected to the drain pipe 14; the pipe of the drain pump 13 is connected to the drain pipe 14 and the atomizing nozzle 15.

[0080] The drain pump 13 has a built-in one-way bearing and is configured to rotate in one direction only, meaning it can only rotate in one direction, opposite to the direction of the blower's rotation. Therefore, the drain pump 13 operates when the shaft 19 rotates in reverse. It should be noted that the blower 3 can also operate when the shaft 19 rotates in reverse and the drain pump 13 operates when it rotates in the forward direction; no specific limitation is made.

[0081] The drain pump 13 is used to extract turbid liquid and spray it under pressure through the drain pipe 14 and the atomizing nozzle 15. The sprayed turbid liquid is configured to perform secondary dust suppression on the working surface environment. The drain subsystem, in conjunction with the aerodynamic subsystem, realizes the pressurization and gas dissolution, atomization and dust removal of the entire system, as well as the prevention of sludge deposition and hard scale formation in the liquid storage tank 1.

[0082] The control subsystem includes: control device 21, hydraulic support controller 22, main valve 23, solenoid valve 24, and sensor 12, as shown in the reference. Figure 3 The image shown is a right view of a dust removal system installed under the top beam of the hydraulic support in a fully mechanized coal mining face. (Refer to...) Figure 4 The image shown is a left view of a dust removal system installed under the top beam of the hydraulic support in a fully mechanized coal mining face. (Refer to...) Figure 5 The image shows a front view of a dust removal system installed under the top beam of the hydraulic support in a fully mechanized coal mining face. Figure 5 The airflow direction is illustrated in the example.

[0083] The control subsystem is used to sense the status of the dust removal system in the fully mechanized coal mining face and to automatically control the dust removal process. The hydraulic support controller 22 is connected to the main valve 23 and the solenoid valve 24 respectively. The hydraulic support controller 22 is used to provide human-machine interaction and remote control functions for the entire dust removal system in the fully mechanized coal mining face.

[0084] Sensor 12 is installed inside the liquid storage tank 1 and is connected to the hydraulic support controller 22. The hydraulic support controller 22 senses the parameters of the liquid storage tank 1 through sensor 12.

[0085] The hydraulic support controller 22 includes a sensing unit and a control unit. The sensing unit senses the dust concentration at the fully mechanized mining face and the operating parameters of the coal mining machine, hydraulic support, and scraper conveyor, as well as the liquid level, temperature, turbidity, water quality, or liquid quality of the storage tank 1, thereby realizing the control of the entire system.

[0086] The control unit controls the opening and closing and reversing of the main valve 23, the opening and closing of the solenoid valve 24, and the opening degree of the proportional valve 16. The control device 21 is used to manage and configure the parameters of one or more hydraulic support controllers 22, centrally display the operation and alarm status of the dust removal system in the fully mechanized coal mining face, and provide a human-machine interface to realize the dust removal method, parameter setting, and remote connection to the hydraulic support controllers 22 in the fully mechanized coal mining face.

[0087] For the entire system, multiple dust removal systems for fully mechanized coal mining faces are installed under the top beam of the hydraulic support of the fully mechanized coal mining face, above the coal mining machine and the scraper conveyor. Depending on the dust concentration at the working face, multiple dust removal systems for fully mechanized coal mining faces can be automatically turned on and off individually, or multiple systems can be automatically turned on and off simultaneously.

[0088] The dust removal methods for fully mechanized coal mining faces implemented using the above-mentioned dust removal methods include:

[0089] Step S1: The sensing unit continuously and cyclically judges the dust concentration at the fully mechanized mining working face;

[0090] Step S2: When the dust concentration at the fully mechanized mining face exceeds the set value of the control device 21 or the hydraulic support controller 22, the hydraulic support controller 22 uses the sensor 12 to detect it.

[0091] Step S3: Check whether the liquid level of the filter medium in the storage tank 1 has reached the set height. If it has reached the height, proceed to step S4. If it has not reached the height, continue to step S4 using the solenoid valve 24, the liquid inlet pipe 2, and the liquid inlet 20.

[0092] Step S4: The control unit opens the main valve 23 switch, and the liquid medium drives the hydraulic motor 4 to rotate in the forward direction and speed through the hydraulic pipeline 6;

[0093] Step S5: The hydraulic motor 4 drives the rotating shaft 19 to rotate in the forward direction through the transmission 17 and clutch 5, which in turn drives the fan 3 to rotate, generating negative pressure. The dust-containing gas is drawn into the storage tank 1 through the filter screen 18, the wind hood 8, and the air intake pipe 9.

[0094] Step S6: The storage tank 1 filters the dust-containing gas using a filter medium to obtain clean gas, and discharges the clean gas from the storage tank 1 through the outlet 11 and enters the working face circulating airflow.

[0095] Step S7: When the sensing unit detects that the turbidity of the liquid in the storage tank 1 exceeds the set upper limit, the control unit opens the reversing switch of the main valve 23, drives the hydraulic motor 4 to rotate in the opposite direction and speed according to the set direction, and links the drain pump 13 to draw out the turbid liquid in the storage tank 1, and discharge it from the system through the drain pipe 14 and the atomizing nozzle 15. When the liquid level in the storage tank 1 reaches the set lower limit, the discharge stops.

[0096] Step S8: The control unit opens the solenoid valve 24 and introduces fresh filter medium for filtration into the storage tank 1 through the liquid inlet pipe 2 until the liquid level in the storage tank 1 reaches the set upper limit and then closes the solenoid valve 24.

[0097] Step S9: Repeat step S1;

[0098] Step S10: When the dust concentration at the fully mechanized mining face is lower than the set value of the control device 21 or the hydraulic support controller 22, the control unit closes the channel corresponding to the main valve 23, stops driving the hydraulic motor 4, and proceeds to step S1.

[0099] The above methods combined Figure 6 The control flow diagram shown can be summarized as follows:

[0100] After the dust removal system of the fully mechanized coal mining face starts working, it first initializes the system parameters, then checks whether the dust concentration exceeds the set value (i.e., judges the dust concentration of the fully mechanized mining face). When the dust concentration exceeds the set value, it checks whether the liquid level of the storage tank reaches the set value (i.e., checks whether the liquid level of the filter medium in storage tank 1 reaches the set height). If it does not reach the set height, it opens the solenoid valve to replenish the liquid to the set liquid level (i.e., replenishes the liquid to the set height) and then closes the solenoid valve.

[0101] If the liquid level in the storage tank reaches the set value, then check whether the turbidity of the storage tank reaches the set value (i.e., the turbidity of the liquid exceeds the set upper limit). If it does not reach the set value, set the speed and forward rotation of the hydraulic motor, and then open the main valve to control the hydraulic motor to rotate forward. The hydraulic motor drives the fan to rotate and draw in the powder-containing gas into the storage tank.

[0102] After the dust-containing gas is purified, it is discharged from the storage tank using a high pressure differential. The system continuously checks whether to stop operation. If so, the main valve is closed and the system stops. If it does not stop operation, the system returns to check whether the dust concentration exceeds the set value.

[0103] If the turbidity of the storage tank reaches the set value, the hydraulic motor speed and reverse rotation are set. Then, the main valve is opened to control the hydraulic motor to reverse, and the hydraulic motor drives the drain pump to rotate and extract the waste liquid from the storage tank. The waste liquid is atomized and sprayed out of the storage tank through a high-pressure nozzle. The system continuously monitors whether the waste liquid has been drained. If it has not been drained, the process continues. If the waste liquid has been drained, the main valve is closed, and the solenoid valve is opened to replenish the liquid to the set level.

[0104] In summary, the dust removal system for fully mechanized coal mining faces provided by this invention includes a hydraulic transmission subsystem that provides the power required for the dust removal system. The power input of the hydraulic motor 4 is provided by the liquid medium in the hydraulic pipeline 6, and its pressure and flow rate are automatically or manually adjusted by the pressure regulating valve 7 and the proportional valve 16. The hydraulic motor 4 outputs the torque and speed required for the dust removal system through the transmission 17, the clutch 5, and the rotating shaft 19.

[0105] The aerodynamic subsystem uses power provided by the hydraulic transmission subsystem to draw in dust-laden gas, draws the dust-laden gas into the liquid inlet and storage subsystem, and then forces the filtered clean gas out of the coal mine longwall face dust removal system, allowing the clean gas to enter the circulating airflow at the working face. The liquid inlet and storage subsystem stores the filter media and uses the filter media to filter the dust-laden gas.

[0106] The liquid discharge subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering dust-containing gas from the liquid storage tank 1; the control subsystem is used to sense the status of the dust removal system in the fully mechanized coal mining face and to automatically control the dust removal of the fully mechanized coal mining face dust removal system.

[0107] This invention creatively proposes a novel dust removal system for fully mechanized coal mining faces. Building upon traditional dust removal equipment and technologies that use spraying to suppress coarse dust from the coal mining machine drums and hydraulic support components, this system specifically targets and removes fine dust particles suspended in the upper part of the mining area. Furthermore, because the cleaned gas is re-introduced into the working face's circulating airflow, a larger ventilation volume can be set while still meeting safety regulations. Since no high-power motor is required, there is no risk of explosion. The system fully utilizes the hydraulic support's fluid supply system as a power source, and a dust removal control system is built using a hydraulic support controller, main valve, solenoid valve, and sensors. Pressurized dissolved gas and atomization methods are employed to improve dust removal efficiency, and a hydraulic drive reduces the risk of explosion from the working face equipment. The entire system is simple in structure, easy to install, has no risk of explosion, features automatic control, and high dust removal efficiency, making it highly practical.

[0108] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0109] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0110] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A dust removal system for a fully mechanized coal mining face, characterized in that, include: Hydraulic transmission subsystem, aerodynamic subsystem, liquid inlet and storage subsystem, liquid outlet subsystem, control subsystem; The hydraulic transmission subsystem includes: a hydraulic motor (4), a gearbox (17), a clutch (5), a hydraulic pipeline (6), a pressure regulating valve (7), a proportional valve (16), and a rotating shaft (19). The hydraulic transmission subsystem is used to provide the power required by the dust removal system of the fully mechanized coal mining face. The power input of the hydraulic motor (4) is provided by the liquid medium in the hydraulic pipeline (6), and its pressure and flow rate are automatically or manually adjusted by the pressure regulating valve (7) and the proportional valve (16). The hydraulic motor (4) outputs the torque and speed required by the dust removal system of the fully mechanized coal mining face through the gearbox (17), the clutch (5), and the rotating shaft (19). The aerodynamic subsystem includes: a wind shroud (8), a fan (3), an air inlet pipe (9), a filter (10), and an air outlet (11). The aerodynamic subsystem is used to draw in dust-containing gas using the power provided by the hydraulic transmission subsystem, draw the dust-containing gas into the liquid inlet subsystem, and press the filtered clean gas out of the coal mine fully mechanized mining face dust removal system, so that the clean gas enters the working face circulating airflow. The fan (3) is connected to the second end of the rotating shaft (19) and draws the dust-containing gas into the liquid inlet subsystem through the air inlet pipe (9). The fan (3) has a built-in one-way bearing and is configured to rotate in one direction. The liquid storage subsystem includes: a liquid storage tank (1), a liquid inlet pipeline (2), and a liquid inlet (20). The liquid storage subsystem is used to store filter media and to filter the dust-containing gas using the filter media. The drainage subsystem includes a drainage pump (13), a drainage pipeline (14), and an atomizing nozzle (15). The drainage subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering the dust-containing gas in the storage tank (1). The drainage pump (13) has a built-in one-way bearing and is configured to rotate in one direction. The rotation direction of the drainage pump (13) is opposite to that of the fan (3). The drainage pump (13) works when the shaft (19) rotates in reverse and the fan (3) works when it rotates in the forward direction, or the fan (3) works when the shaft (19) rotates in reverse and the drainage pump (13) works when it rotates in the forward direction. The control subsystem includes: a control device (21), a hydraulic support controller (22), a main valve (23), a solenoid valve (24), and a sensor (12). The control subsystem is used to sense the status of the dust removal system of the fully mechanized coal mining face and to automatically control the dust removal of the fully mechanized coal mining face. Multiple dust removal systems for the fully mechanized coal mining face are installed under the top beam of the hydraulic support of the fully mechanized coal mining face, above the coal mining machine and the scraper conveyor.

2. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, Depending on the dust concentration at the working face, multiple dust removal systems at the coal mine fully mechanized mining face can be automatically turned on and off individually, or multiple systems can be automatically turned on and off simultaneously.

3. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, The first end of the hydraulic motor (4) is connected to the main valve (23) through the hydraulic pipeline (6), and the second end is fixedly connected to the first end of the rotating shaft (19). The main valve (23) controls the power output, closing and reversing of the liquid medium, thereby controlling the start, stop and forward / reverse rotation of the hydraulic motor (4). The liquid medium includes: water-based lubricants and oil-based lubricants; The pressure regulating valve (7) and the proportional valve (16) are mounted on the hydraulic pipeline (6). The proportional valve (16) controls the speed of the hydraulic motor (4), and the pressure regulating valve (7) controls the torque of the hydraulic motor (4). The transmission (17) and the clutch (5) are mounted on the rotating shaft (19), and the rotating shaft (19) is controlled by the hydraulic motor (4) to rotate forward and backward and to stop rotating.

4. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, The aerodynamic subsystem also includes: a filter (18); The filter screen (18) is installed at the air inlet end of the wind-gathering hood (8). The wind-gathering hood (8) is adjusted to face the opposite direction of the airflow direction of the fully mechanized mining face, with an angle of 0° to 30°. The wind-gathering hood (8) is configured to be cleaned by washing with water or air. The filter (10) is installed at the port where the air inlet pipe (9) extends into the liquid storage tank (1); The air outlet (11) is installed on the upper part of the liquid storage tank (1).

5. The dust removal system for fully mechanized coal mining faces according to claim 4, characterized in that, The fan (3) has a pressurization function. By using the high pressure difference generated by the rotation of the fan (3), the dust-containing gas is initially filtered and drawn into the liquid storage tank (1) through the wind hood (8) and the filter screen (18). The vent (11) is configured to be in a sealed state under natural conditions and when the pressure of the liquid tank (1) is lower than the external pressure; The clean gas is discharged into the working face circulating airflow by opening the air outlet (11) using the pressure difference, without disturbing the working face ventilation system.

6. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, The inlet (20) is connected to the solenoid valve (24) through the inlet pipe (2), and the solenoid valve (24) provides the filter medium, which includes: water and biofilm dust suppressant; The storage tank (1) stores the filter medium. The dust-containing gas is blown into the filter medium and filtered using the filter medium to obtain the clean gas.

7. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, The second end of the rotating shaft (19) is also connected to the first end of the drain pump (13), and the second end of the drain pump (13) is connected to the drain pipe (14); The pipeline of the drain pump (13) is connected to the drain pipeline (14) and the atomizing nozzle (15); The drain pump (13) is used to extract the turbid liquid and pressurize it through the drain pipe (14) and the atomizing nozzle (15). The sprayed turbid liquid is configured to perform secondary dust suppression on the working surface environment. The drainage subsystem, in conjunction with the aerodynamic subsystem, enables pressurized gas dissolution, atomized dust removal, and prevention of sludge deposition and scale formation in the storage tank (1).

8. The dust removal system for fully mechanized coal mining faces according to claim 1, characterized in that, The hydraulic support controller (22) is connected to the main valve (23) and the solenoid valve (24) respectively. The hydraulic support controller (22) is used to provide human-machine interaction and remote control functions for the dust removal system of the coal mine fully mechanized mining face. The sensor (12) is installed inside the liquid storage tank (1) and is connected to the hydraulic support controller (22). The hydraulic support controller (22) senses the parameters of the liquid storage tank (1) through the sensor (12).

9. The dust removal system for fully mechanized coal mining faces according to claim 8, characterized in that, The hydraulic support controller (22) includes a sensing unit and a control unit. The sensing unit senses the dust concentration at the fully mechanized mining face and the operating parameters of the coal mining machine, hydraulic support, and scraper conveyor, as well as the liquid level, temperature, turbidity, water quality, or liquid quality of the storage tank (1). The control unit controls the opening and closing and reversing of the main valve (23), the opening and closing of the solenoid valve (24), and the opening degree of the proportional valve (16); The control device (21) is used to manage and configure the parameters of one or more hydraulic support controllers (22), centrally display the operation and alarm status of the dust removal system of the coal mine fully mechanized mining face, and provide a human-machine interface to realize the dust removal method, parameter setting and remote connection of the hydraulic support controller (22) of the coal mine fully mechanized mining face.

10. The dust removal system for fully mechanized coal mining faces according to claim 9, characterized in that, The dust removal method for fully mechanized coal mining faces includes: Step S1: The sensing unit continuously and cyclically judges the dust concentration at the fully mechanized mining working surface; Step S2: When the dust concentration at the fully mechanized mining face exceeds the set value of the control device (21) or the hydraulic support controller (22), the hydraulic support controller (22) uses the sensor (12) to detect it; Step S3: Detect whether the liquid level of the filter medium in the storage tank (1) has reached the set height. If it has reached the height, proceed to step S4. If it has not reached the height, use the solenoid valve (24), the liquid inlet pipe (2), and the liquid inlet (20) to continuously replenish the liquid to the set height and then proceed to step S4. Step S4: The control unit opens the main valve (23) switch, and the liquid medium drives the hydraulic motor (4) to rotate in the forward direction and speed according to the set direction through the hydraulic pipeline (6); Step S5: The hydraulic motor (4) drives the rotating shaft (19) to rotate in the forward direction through the transmission (17) and the clutch (5), which in turn drives the fan (3) to rotate, generating negative pressure, and drawing the dust-containing gas into the liquid storage tank (1) through the filter screen (18), the wind shroud (8), and the air intake pipe (9). Step S6: The liquid storage tank (1) filters the dust-containing gas using the filter medium to obtain the clean gas, and discharges the clean gas from the liquid storage tank (1) through the air outlet (11) and enters the working face circulating airflow; Step S7: When the sensing unit senses that the turbidity of the liquid in the storage tank (1) exceeds the set upper limit, the control unit opens the reversing switch of the main valve (23), drives the hydraulic motor (4) to rotate in the opposite direction and speed according to the set direction, and links the drain pump (13) to draw out the turbid liquid in the storage tank (1), and discharges it through the drain pipe (14) and the atomizing nozzle (15) into the system. When the liquid level in the storage tank (1) reaches the set lower limit, the discharge stops. Step S8: The control unit opens the solenoid valve (24) and introduces fresh filter medium for filtration into the storage tank (1) through the liquid inlet pipe (2) until the liquid level in the storage tank (1) reaches the set upper limit and then closes the solenoid valve (24). Step S9: Repeat step S1; Step S10: When the dust concentration at the fully mechanized mining face is lower than the set value of the control device (21) or the hydraulic support controller (22), the control unit closes the channel corresponding to the main valve (23), stops driving the hydraulic motor (4), and proceeds to step S1.

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