Dust removal system for fully mechanized coal mining face of coal mine

Abstract

The invention provides a dust removal system for a fully mechanized coal mining face of a coal mine. The dust removal system comprises a hydraulic transmission subsystem, an aerodynamic subsystem, a liquid inlet and storage subsystem, a liquid drainage subsystem and a control subsystem. The control subsystem senses and controls the hydrodynamic transmission subsystem, a hydraulic motor is driven by a liquid medium to drive a fan to rotate, the fan generates negative pressure to suck dust on a working face into a liquid storage tank, and the effects of pressurized gas dissolving and atomization dust removal are achieved; the control subsystem senses and controls the liquid discharge subsystem, a liquid discharge pump is driven by a hydraulic motor to rotate, a medium for dust removal is discharged, and the effects of medium replacement, container cleaning and secondary dust removal are achieved; and the control subsystem senses and controls the medium for dust removal to enter the liquid storage subsystem. The control subsystem utilizes existing equipment of the fully mechanized coal mining face to sense working face environment and equipment operation parameters, and automatic dust removal of a single control system or a group control system is achieved. The device is simple in structure, easy to install, free of explosion risks, automatic in control and high in dust removal efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent dust removal in mines, in particular to a dust removal system for a fully mechanized mining working face in a coal mine. Background Art

[0002] A large amount of floating dust is generated in coal mines due to mining activities and ventilation conditions. The fully mechanized mining face has a high dust generation intensity and a large mining area, making it one of the key areas of dust disasters. The fully mechanized mining face adopts mechanical coal breaking and loading technology. When the coal mining machine cutting and hydraulic support frame shifting are working together, the dust mass concentration can reach 500-850mg / m3, and the respirable dust mass concentration can reach 300-500mg / m3, which seriously affects the safe production of coal mines, the role of intelligent equipment, and seriously threatens the occupational health of workers.

[0003] In view of the challenges brought by the dust control of the above-mentioned comprehensive mining working surface, and the higher standards and requirements for mine dust control put forward by the intelligentization of coal mines. At present, most coal mines use coal mining machines and hydraulic supports to reduce dust by high-pressure water supply spray. This dust reduction method has obvious dust reduction effect on coarse dust. However, there is still a large amount of fine dust suspended in the upper space of the mining area in the working face area, which diffuses to the return air tunnel with the direction of the wind flow. It is not easy to settle, which endangers the health of personnel in the working area; at the same time, high concentrations of dust affect the video effect of the working face, and the video AI dust removal technology cannot filter dust, resulting in remote control personnel cannot see clearly, and cannot operate the intelligent system normally to realize remote coal cutting and pushing, pulling and other functions. Intelligent equipment cannot play the role of reducing manpower and improving efficiency. Summary of the invention

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

[0005] The embodiment of the present invention provides a coal mine fully mechanized mining face dust removal system, comprising: a hydraulic transmission subsystem, an air power subsystem, a liquid inlet and storage subsystem, a liquid discharge subsystem, and a control subsystem;

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

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

[0008] The liquid inlet and storage subsystem comprises: a liquid storage tank 1, a liquid inlet pipeline 2, and a liquid inlet 20. The liquid inlet and storage subsystem is used to store filter media and 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 to extract, pressurize and atomize the turbid liquid after filtering the dust-containing gas in the liquid 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 state of the dust removal system of the coal mine comprehensive mining working face, and automatically control the dust removal of the coal mine comprehensive mining working face dust removal system.

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

[0012] According to the dust concentration in the working face, the plurality of coal mine comprehensive mining working face dust removal systems can be automatically started and stopped individually, or multiple systems can be automatically started and stopped 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, and the main valve 23 controls the power output, closing and reversing of the liquid medium, thereby controlling the start and stop and forward and reverse rotation of the hydraulic motor 4;

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

[0015] The pressure regulating valve 7 and the proportional valve 16 are mounted on the hydraulic pipeline 6, and the rotation speed of the hydraulic motor 4 is controlled by the proportional valve 16, and the torque of the hydraulic motor 4 is controlled by the pressure regulating valve 7;

[0016] 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, reverse and stop.

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

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

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

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

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

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

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

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

[0025] The clean gas opens the gas outlet 11 by utilizing the pressure difference and is discharged into the circulating air flow of the working surface without causing disturbance to the ventilation system of the working surface.

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

[0027] The liquid storage tank 1 stores the filter medium, the dust-containing gas is blown into the filter medium, and is filtered by 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 drainage pump 13, and the second end of the drainage pump 13 is connected to the drainage pipeline 14;

[0029] The liquid displacement pump 13 has a built-in one-way bearing, and the liquid displacement pump 13 is configured to rotate in one direction. When the rotating shaft 19 is reversed, the liquid displacement pump 13 works;

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

[0031] The drainage pump 13 is used to extract the turbid liquid and spray it out through the drainage pipeline 14 and the atomizing nozzle 15 under pressure. The sprayed turbid liquid is configured to perform secondary dust reduction on the working surface environment.

[0032] The liquid discharge subsystem cooperates with the air power subsystem to achieve pressurized air dissolution, atomization dust removal, and prevent sludge deposition and hard scale generation 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-computer interaction and remote control functions for the coal mine fully mechanized mining working face dust removal system;

[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 of the fully mechanized mining working surface and the operating parameters of the coal mining machine, the hydraulic support, and the scraper conveyor, and senses the liquid level, temperature, turbidity, water quality or liquid quality of the liquid storage tank 1;

[0036] The control unit controls the opening and closing and switching 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 a single or multiple hydraulic support controllers 22, centrally display the operation and alarm status of the coal mine comprehensive mining working face dust removal system, and provide a human-computer interaction interface to implement the coal mine comprehensive mining working face dust removal method, parameter setting and remote connection of the hydraulic support controller 22.

[0038] Optionally, the coal mine fully mechanized mining face dust removal method comprises:

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

[0040] Step S2: When the dust concentration of the fully mechanized mining working surface 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;

[0041] Step S3: Detect whether the liquid level of the filter medium in the liquid storage tank 1 reaches a set height. If it reaches the height, proceed to step S4. If it does not reach the height, use the solenoid valve 24, the liquid inlet pipeline 2, and the liquid inlet 20 to continuously replenish the liquid to the set height and then proceed to step S4.

[0042] Step S4: the control unit opens the main valve 23, and the liquid medium drives the hydraulic motor 4 to rotate in the forward direction according to the set 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, and drives the fan 3 to rotate, thereby generating negative pressure, and sucking the dust-containing gas into the liquid storage tank 1 through the filter 18, the wind collecting hood 8, and the air intake pipe 9;

[0044] Step S6: the liquid storage tank 1 uses the filter medium to filter the dust-containing gas to obtain the clean gas, and the clean gas is discharged from the liquid storage tank 1 through the gas outlet 11 and enters the circulating airflow of the working surface;

[0045] Step S7: When the sensing unit senses that the turbidity of the liquid in the liquid storage tank 1 exceeds the set upper limit, the control unit turns on the reversing switch of the main valve 23, drives the hydraulic motor 4 to rotate in the reverse direction and speed according to the set direction, and links the drainage pump 13 to extract the turbid liquid in the liquid storage tank 1, and discharges the system through the drainage pipeline 14 and the atomizing nozzle 15. When the liquid level in the liquid storage tank 1 reaches the set lower limit, the drainage stops;

[0046] Step S8: the control unit opens the solenoid valve 24, introduces fresh filtration medium into the liquid storage tank 1 through the liquid inlet pipeline 2, and closes the solenoid valve 24 after the liquid level of the liquid storage tank (1) reaches the set upper limit;

[0047] Step S9: loop into step S1;

[0048] Step S10: When the dust concentration of the fully mechanized mining working surface is lower than the setting 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 enters step S1.

[0049] The coal mine fully mechanized mining working face dust removal system provided by the present invention, the hydraulic transmission subsystem is used to provide the power required by the coal mine fully mechanized mining working face dust removal system, wherein the power input of the hydraulic motor 4 is provided by the liquid medium in the hydraulic pipeline 6, and its pressure and flow 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 coal mine fully mechanized mining working face dust removal system through the transmission 17, the clutch 5, and the rotating shaft 19.

[0050] The air power subsystem is used to use the power provided by the hydraulic transmission subsystem to suck the dust-containing gas into the liquid inlet and storage subsystem, and press the filtered clean gas out of the coal mine fully-mechanized working face dust removal system, so that the clean gas enters the working face circulating air flow. The liquid inlet and storage subsystem is used to store the filter medium and filter the dust-containing gas using the filter medium.

[0051] The drainage subsystem is used to extract, pressurize and atomize the turbid liquid after filtering the dust-containing gas in the liquid storage tank 1; the control subsystem is used to sense the state of the dust removal system of the coal mine comprehensive mining working face, and to automatically control the dust removal of the dust removal system of the coal mine comprehensive mining working face.

[0052] The present invention creatively proposes a new dust removal system for the fully mechanized mining face of coal mines. On the basis of spraying dust reduction for the coarse dust of the coal mining machine drum and the hydraulic support column lowering and moving frame accessories of the fully mechanized mining face by traditional dust removal equipment and technology, the fine dust floating in the upper space of the mining field is treated and dusted in a targeted manner. At the same time, since the clean gas after dust removal is discharged back into the circulating airflow of the working face, a larger ventilation volume can be set under the condition that the ventilation volume of the working face meets the requirements of the safety regulations. No high-power motor drive is required, so there is naturally no safety hazard of explosion failure. The hydraulic support's fluid supply system is fully utilized as the power source, and the hydraulic support controller, main valve, solenoid valve and sensor are used to build a dust removal control system; pressurized dissolved air and atomization methods are used to improve the dust removal efficiency; hydraulic drive is used to reduce the risk of explosion failure of the working face equipment. The structure of the entire system is simple and easy to install, has no risk of explosion failure, automatic control, high dust removal efficiency, and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0054] Figure 1 2 is a front view of a coal mine fully mechanized mining face dust removal system according to an embodiment of the present invention;

[0055] Figure 2 2. It 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 It is a right view of a coal mine fully-mechanized mining face dust removal system installed under the top beam of the hydraulic support of the working face in an embodiment of the present invention;

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

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

[0059] Figure 6 It is a control overview flow chart of the dust removal system of the coal mine fully mechanized mining working face in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, are only part of the embodiments of the present invention, not all of the embodiments, and are not used to limit the present invention.

[0061] The inventors found that the traditional dust reduction method has an obvious dust reduction effect on coarse dust, but it is not effective in removing a large amount of fine dust in the working surface area. The main problems are as follows:

[0062] (1) Most of the existing dust removal equipment and technologies are aimed at spraying and dust reduction of coarse dust from the shearer drum and hydraulic support column lowering and moving frame accessories in the fully mechanized working face, but lack equipment and technology for the treatment of fine dust floating in the upper space of the mining area;

[0063] (2) The ventilation volume of the fully mechanized mining face cannot be adjusted dynamically, resulting in a slow diffusion of dust. The ventilation volume of the working face should not be set too large while meeting the requirements of safety regulations. Large ventilation volume can easily cause spontaneous combustion in the goaf;

[0064] (3) Some fully mechanized mining faces have negative pressure dust removal fans arranged in the return air chute, using negative pressure wet dust removal technology, driven by high-power motors, and using spray and filter screens to reduce dust concentration in the gas. The dust removal effect is not obvious, and it has no effect on dust reduction inside the fully mechanized mining face. In addition, the negative pressure dust removal fans are arranged in the return air tunnel, which poses a safety hazard of explosion failure.

[0065] (4) The comprehensive mining face has a complete and sufficient hydraulic power and control system, but has not considered making full use of the hydraulic support's fluid supply system as a power source, and has not considered building a dust removal control system with the hydraulic support controller, main valve, solenoid valve and sensor; has not considered using pressurized dissolved air and atomization methods to improve dust removal efficiency; has not considered using hydraulic drive to reduce the risk of explosion of working face equipment.

[0066] In view of the above problems, the inventor creatively proposes a coal mine fully mechanized mining face dust removal system of the present invention. The technical solution of the present invention is explained and illustrated in detail below.

[0067] The dust removal system for coal mine fully mechanized working face of the present invention comprises: a hydraulic transmission subsystem, an air power subsystem, a liquid inlet and storage subsystem, a liquid discharge subsystem, and a control subsystem. Figure 1 , showing a front view of a coal mine fully mechanized mining face dust removal system according to an embodiment of the present invention, referring to Figure 2 , showing a rear view of a coal mine fully mechanized mining face dust removal system according to an embodiment of the present invention.

[0068] The hydraulic transmission subsystem includes: a hydraulic motor 4, a transmission 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 coal mine comprehensive mining working 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 are automatically or manually adjusted through 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 coal mine comprehensive mining working face through the transmission 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 ( Figure 3 , 4 The main valve 23 controls the power output, closing and reversing of the liquid medium, thereby controlling the start and stop and forward and reverse rotation of the hydraulic motor 4; wherein the liquid medium includes: water-based lubricants, oil-based lubricants, etc., and these liquid media have the characteristics of low cost, non-toxic, corrosion-resistant, rust-resistant, non-irritating, degradable and environmentally friendly.

[0070] The pressure regulating valve 7 and the proportional valve 16 are mounted on the hydraulic pipeline 6, and the speed of the hydraulic motor 4 is controlled by the proportional valve 16, and the torque of the hydraulic motor 4 is controlled by the pressure regulating valve 7. 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, reverse and stop.

[0071] The air power subsystem includes: a wind hood 8, a fan 3, an air inlet pipeline 9, a filter 10, and an air outlet 11. The air power subsystem is used to use the power provided by the hydraulic transmission subsystem to inhale the dust-containing gas, inhale the dust-containing gas into the liquid storage subsystem, and press the filtered clean gas out of the coal mine fully mechanized mining working face dust removal system, so that the clean gas enters the working face circulating air flow. The air power subsystem has the characteristics of pressurized air dissolution, atomization dust removal, and preventing sludge deposition and hard scale generation in the liquid storage tank 1.

[0072] Preferably, the aerodynamic subsystem also includes: a filter 18; the filter 18 is installed at the air inlet end of the wind collecting hood 8, and the wind collecting hood 8 is adjusted so that its angle is opposite to the wind flow direction of the comprehensive mining working face, with an angle of 0° to 30°, and the wind collecting hood 8 is configured to be flushed and cleaned with water or wind.

[0073] The fan 3 is connected to the second end of the rotating shaft 19 and sucks the dust-containing gas into the liquid storage 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, that is, the fan 3 can only rotate in one direction, and the fan 3 works when the rotating shaft 19 rotates forward; the filter 10 is installed at the port of the air inlet pipe 9 extending into the liquid storage tank (1); the air outlet 11 is installed at the upper part of the liquid storage tank 1.

[0074] The fan 3 also has a pressurizing function. By utilizing the high pressure difference generated by the rotation of the fan 3, the dust-containing gas can be initially filtered through the wind hood 8 and the filter 18 and sucked into the liquid storage tank 1; the gas outlet 11 is configured to be in a closed state in a natural state and when the pressure of the liquid storage tank 1 is lower than the external pressure. This can prevent unclean gas from being discharged into the circulating airflow of the working surface, while the clean gas uses the pressure difference to open the gas outlet 11 and be discharged into the circulating airflow of the working surface, without causing disturbance to the ventilation system of the working surface.

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

[0076] Specifically: the liquid inlet 20 is connected to the solenoid valve 24 ( Figure 3 , 4 ) is connected, and the solenoid valve 24 provides a filter medium, which includes: water, bio-nanofilm dust suppressant, etc. The filter medium has the characteristics of strong adsorption capacity for fine particle dust, non-toxic, non-irritating, degradable, low cost and no pollution to the environment.

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

[0078] The liquid discharge subsystem includes: a liquid discharge pump 13 , a liquid discharge pipeline 14 , and an atomizing nozzle 15 . The liquid discharge subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering the dust-containing gas in the liquid storage tank 1 .

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

[0080] The liquid displacement pump 13 has a one-way bearing built in, and the liquid displacement pump 13 is also configured to rotate in one direction, that is, the liquid displacement pump 13 can only rotate in one direction, which needs to be opposite to the rotation direction of the fan, so the liquid displacement pump 13 works when the rotating shaft 19 is reversed. It should be noted that the fan 3 can also work when the rotating shaft 19 is reversed, and the liquid displacement pump 13 works when it is forwardly rotated, without specific limitation.

[0081] The drainage pump 13 is used to extract the turbid liquid and spray it out under pressure through the drainage pipeline 14 and the atomizing nozzle 15. The sprayed turbid liquid is configured to perform secondary dust reduction on the working surface environment; the drainage subsystem cooperates with the aerodynamic subsystem to realize pressurized dissolved air and atomized dust removal of the entire system, and prevent sludge deposition and hard scale generation in the liquid storage tank 1.

[0082] 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. Figure 3 The right view of a coal mine fully mechanized mining face dust removal system installed under the top beam of the hydraulic support of the working face is shown in the figure. Figure 4 The left view of a coal mine fully mechanized mining face dust removal system installed under the top beam of the hydraulic support of the working face is shown in the figure. Figure 5 A front view of a coal mine fully mechanized mining face dust removal system installed under the top beam of the hydraulic support of the working face ( Figure 5 The wind flow direction is shown as an example in FIG.

[0083] The control subsystem is used to sense the state of the dust removal system of the coal mine fully-mechanized working face and automatically control the dust removal of the coal mine fully-mechanized working face dust removal system. 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-computer interaction and remote control functions for the dust removal system of the entire coal mine fully-mechanized working face.

[0084] 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 .

[0085] The hydraulic support controller 22 includes: a sensing unit and a control unit. The sensing unit senses the dust concentration of the fully mechanized mining working surface 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 liquid 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 of the proportional valve 16. The control device 21 is used to manage and configure the parameters of a single or multiple hydraulic support controllers 22, centrally display the operation and alarm status of the dust removal system of the fully mechanized mining working face of the coal mine, and provide a human-computer interaction interface to realize the dust removal method, parameter setting and remote connection of the hydraulic support controller 22 of the fully mechanized mining working face of the coal mine.

[0087] For the entire system, multiple coal mine comprehensive mining working face dust removal systems are installed respectively under the hydraulic support top beam of the comprehensive mining working face and above the coal mining machine and scraper conveyor; according to the dust concentration in the working face, multiple coal mine comprehensive mining working face dust removal systems can be automatically started and stopped individually, or multiple systems can be automatically started and stopped at the same time.

[0088] The method for removing dust from a fully-mechanized coal mining face using the above-mentioned fully-mechanized coal mining face dust removal comprises:

[0089] Step S1: The sensing unit cyclically and continuously determines the dust concentration in the fully mechanized mining working surface;

[0090] Step S2: When the dust concentration of the fully mechanized mining working surface 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;

[0091] Step S3: Detect whether the liquid level of the filter medium in the liquid storage tank 1 reaches the set height. If it reaches the height, proceed to step S4. If it does not reach the height, continue to proceed to step S4 by using the solenoid valve 24, the liquid inlet pipeline 2, and the liquid inlet port 20;

[0092] Step S4: the control unit opens the main valve 23, and the liquid medium drives the hydraulic motor 4 to rotate in the forward direction according to the set 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 the clutch 5, and the fan 3 is linked to rotate to generate negative pressure, and the dust-containing gas is sucked into the liquid storage tank 1 through the filter 18, the wind hood 8, and the air intake pipe 9;

[0094] Step S6: the liquid storage tank 1 uses the filter medium to filter the dust-containing gas to obtain clean gas, and the clean gas is discharged from the liquid storage tank 1 through the gas outlet 11 and enters the circulating air flow of the working surface;

[0095] Step S7: When the sensing unit senses that the turbidity of the liquid in the liquid storage tank 1 exceeds the set upper limit, the control unit turns on the reversing switch of the main valve 23, drives the hydraulic motor 4 to rotate in the reverse direction and speed according to the set direction, and links the liquid discharge pump 13 to extract the turbid liquid in the liquid storage tank 1, and discharges the system through the liquid discharge pipeline 14 and the atomizing nozzle 15. When the liquid level in the liquid storage tank 1 reaches the set lower limit, the discharge stops;

[0096] Step S8: the control unit opens the solenoid valve 24, introduces fresh filtration medium into the liquid storage tank 1 through the liquid inlet pipe 2, and closes the solenoid valve 24 after the liquid level in the liquid storage tank 1 reaches the set upper limit;

[0097] Step S9: loop into step S1;

[0098] Step S10: When the dust concentration in the fully mechanized mining working surface is lower than the setting 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 enters step S1.

[0099] Combination of the above methods Figure 6 The control flow diagram shown is summarized as:

[0100] After the dust removal system of the coal mine comprehensive mining working face starts working, the system parameters are initialized first, and then the dust concentration is detected to see if it exceeds the set value (i.e., the dust concentration of the comprehensive mining working face is determined). When the dust concentration exceeds the set value, the liquid level in the liquid storage tank is detected to see if it reaches the set value (i.e., whether the filter medium level in the liquid storage tank 1 reaches the set height). If not, the solenoid valve is opened to replenish the liquid to the liquid level setting value (i.e., replenish the liquid to the set height) and then the solenoid valve is closed.

[0101] If the liquid level in the liquid storage tank reaches the set value, the turbidity of the liquid storage tank is detected to see if it reaches the set value (i.e. the liquid turbidity exceeds the set upper limit). If not, the speed and forward rotation of the hydraulic motor are set, and then the main valve is opened to control the forward rotation of the hydraulic motor. The hydraulic motor drives the fan to rotate and inhale the powder-containing gas into the liquid storage tank.

[0102] After the powder-containing gas is purified, it is discharged from the liquid storage tank using a high pressure difference, and it is continuously determined whether to stop running. If so, the main valve system is closed to stop running; if it does not stop running, it returns to detect whether the dust concentration exceeds the set value.

[0103] If the turbidity of the liquid storage tank reaches the set value, the speed of the hydraulic motor is set and the reverse rotation is set. Then the main valve is opened to control the reverse rotation of the hydraulic motor. The hydraulic motor drives the liquid discharge pump to rotate and extract the waste liquid from the liquid storage tank. The waste liquid is sprayed out of the liquid storage tank through the high-pressure nozzle. Continue to check whether the waste liquid is emptied. If it is not emptied, continue. If it is emptied, close the main valve and open the solenoid valve to replenish the liquid to the set value of the liquid level.

[0104] To sum up, in the coal mine comprehensive mining working face dust removal system provided by the present invention, the hydraulic transmission subsystem is used to provide the power required by the coal mine comprehensive mining working face dust removal system, wherein the power input of the hydraulic motor 4 is provided by the liquid medium in the hydraulic pipeline 6, and its pressure and flow 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 coal mine comprehensive mining working face dust removal system through the transmission 17, the clutch 5, and the rotating shaft 19.

[0105] The air power subsystem is used to use the power provided by the hydraulic transmission subsystem to suck the dust-containing gas into the liquid inlet and storage subsystem, and press the filtered clean gas out of the coal mine fully-mechanized working face dust removal system, so that the clean gas enters the working face circulating air flow. The liquid inlet and storage subsystem is used to store the filter medium and filter the dust-containing gas using the filter medium.

[0106] The drainage subsystem is used to extract, pressurize and atomize the turbid liquid after filtering the dust-containing gas in the liquid storage tank 1; the control subsystem is used to sense the state of the dust removal system of the coal mine comprehensive mining working face, and to automatically control the dust removal of the dust removal system of the coal mine comprehensive mining working face.

[0107] The present invention creatively proposes a new dust removal system for the fully mechanized mining face of coal mines. On the basis of spraying dust reduction for the coarse dust of the coal mining machine drum and the hydraulic support column lowering and moving frame accessories of the fully mechanized mining face by traditional dust removal equipment and technology, the fine dust floating in the upper space of the mining field is treated and dusted in a targeted manner. At the same time, since the clean gas after dust removal is discharged back into the circulating airflow of the working face, a larger ventilation volume can be set under the condition that the ventilation volume of the working face meets the requirements of the safety regulations. No high-power motor drive is required, so there is naturally no safety hazard of explosion failure. The hydraulic support's fluid supply system is fully utilized as the power source, and the hydraulic support controller, main valve, solenoid valve and sensor are used to build a dust removal control system; pressurized dissolved air and atomization methods are used to improve the dust removal efficiency; hydraulic drive is used to reduce the risk of explosion failure of the working face equipment. The structure of the entire system is simple and easy to install, has no risk of explosion failure, automatic control, high dust removal efficiency, and high practicality.

[0108] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0109] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0110] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection 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 discharge subsystem, and control subsystem; The hydraulic transmission subsystem comprises: a hydraulic motor (4), a transmission (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 coal mine fully mechanized mining working face dust removal system, wherein the power input of the hydraulic motor (4) is provided by the liquid medium in the hydraulic pipeline (6), and its pressure and flow are automatically or manually adjusted through the pressure regulating valve (7) and the proportional valve (16); the hydraulic motor (4) outputs the torque and speed required by the coal mine fully mechanized mining working face dust removal system through the transmission (17), the clutch (5), and the rotating shaft (19); The air power subsystem comprises: an air collecting hood (8), a fan (3), an air inlet pipeline (9), a filter (10), and an air outlet (11). The air power subsystem is used to inhale dust-containing gas by using the power provided by the hydraulic transmission subsystem, inhale the dust-containing gas into the liquid inlet and storage subsystem, and press the filtered clean gas out of the coal mine fully mechanized mining working face dust removal system, so that the clean gas enters the working face circulating airflow; The liquid inlet and storage subsystem comprises: a liquid storage box (1), a liquid inlet pipeline (2), and a liquid inlet (20); the liquid inlet and storage subsystem is used to store a filter medium and filter the dust-containing gas using the filter medium; The liquid discharge subsystem comprises: a liquid discharge pump (13), a liquid discharge pipeline (14), and an atomizing nozzle (15), and the liquid discharge subsystem is used for extracting, pressurizing, and atomizing the turbid liquid after filtering the dust-containing gas in the liquid storage tank (1); The control subsystem comprises: 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 state of the dust removal system of the coal mine fully-mechanized mining working face, and automatically control the dust removal of the dust removal system of the coal mine fully-mechanized mining working face.

2. The dust removal system for fully mechanized coal mining working face according to claim 1 is characterized in that: A plurality of the coal mine fully mechanized mining working face dust removal systems are respectively installed under the top beam of the hydraulic support of the fully mechanized mining working face and above the coal mining machine and the scraper conveyor; According to the dust concentration in the working face, the plurality of coal mine comprehensive mining working face dust removal systems can be automatically started and stopped individually, or multiple systems can be automatically started and stopped simultaneously.

3. The dust removal system for coal mine fully mechanized mining working face according to claim 1 is 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 and stop and forward and reverse rotation of the hydraulic motor (4); The liquid medium includes: water-based lubricant and oil-based lubricant; The pressure regulating valve (7) and the proportional valve (16) are mounted on the hydraulic pipeline (6), and the rotation speed of the hydraulic motor (4) is controlled by the proportional valve (16), and the torque of the hydraulic motor (4) is controlled by the pressure regulating valve (7); The transmission (17) and the clutch (5) are mounted on the rotating shaft (19), and the hydraulic motor (4) controls the rotating shaft (19) to rotate forward, reverse and stop rotating.

4. The dust removal system for fully mechanized coal mining working face according to claim 1 is characterized in that: The aerodynamic subsystem further comprises: a filter (18); The filter screen (18) is installed at the air inlet end of the wind collecting hood (8), and the wind collecting hood (8) is adjusted to face in the opposite direction of the wind flow direction of the fully mechanized mining working face, with an angle of 0° to 30°. The wind collecting hood (8) is configured to be washed and cleaned with water or wind; The fan (3) is connected to the second end of the rotating shaft (19) and sucks the dust-containing gas into the liquid inlet and storage subsystem through the air inlet pipeline (9); The fan (3) has a built-in one-way bearing, and the fan (3) is configured to rotate in one direction, and the fan (3) works when the rotating shaft (19) rotates forward; The filter (10) is installed at the port of the air intake pipeline (9) extending 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 working face according to claim 4 is characterized in that: The fan (3) has a pressurizing function, and utilizes the high pressure difference generated by the rotation of the fan (3) to initially filter the dust-containing gas through the wind collecting hood (8) and the filter screen (18) and suck it into the liquid storage tank (1); The air outlet (11) is configured to be in a sealed state in a natural state and when the pressure of the liquid storage tank (1) is lower than the external pressure; The clean gas opens the gas outlet (11) by utilizing the pressure difference and is discharged into the circulating air flow of the working surface without causing disturbance to the ventilation system of the working surface.

6. The dust removal system for fully mechanized coal mining working face according to claim 1 is characterized in that: The liquid inlet (20) is connected to the electromagnetic valve (24) through the liquid inlet pipeline (2), and the electromagnetic valve (24) provides the filter medium, and the filter medium includes: water and biological nanofilm dust suppressant; The liquid storage tank (1) stores the filter medium, the dust-containing gas is blown into the filter medium, and is filtered by the filter medium to obtain the clean gas.

7. The dust removal system for fully mechanized coal mining working face according to claim 1 is characterized in that: The second end of the rotating shaft (19) is also connected to the first end of the liquid discharge pump (13), and the second end of the liquid discharge pump (13) is connected to the liquid discharge pipeline (14); The liquid displacement pump (13) has a built-in one-way bearing, and the liquid displacement pump (13) is configured to rotate in one direction, and the liquid displacement pump (13) works when the rotating shaft (19) rotates reversely; The pipeline of the liquid discharge pump (13) is connected to the liquid discharge pipeline (14) and the atomizing nozzle (15); The drainage pump (13) is used to extract the turbid liquid and spray it out through the drainage pipeline (14) and the atomizing nozzle (15) under pressure, and the sprayed turbid liquid is configured to perform secondary dust reduction on the working surface environment; The liquid discharge subsystem cooperates with the air power subsystem to achieve pressurized air dissolution, atomization dust removal, and prevent sludge deposition and hard scale generation in the liquid storage tank (1).

8. The dust removal system for fully mechanized coal mining working face according to claim 1 is characterized in that: 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-computer interaction and remote control functions for the coal mine fully mechanized mining working face dust removal system; 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 working face according to claim 8, characterized in that: The hydraulic support controller (22) comprises: a sensing unit and a control unit, wherein the sensing unit senses the dust concentration of the fully mechanized mining working surface and the operating parameters of the coal mining machine, the hydraulic support and the scraper conveyor, and senses the liquid level, temperature, turbidity, water quality or liquid quality of the liquid storage tank (1); The control unit controls the opening and closing and switching 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 a single or multiple hydraulic support controllers (22), centrally display the operation and alarm status of the coal mine comprehensive mining working face dust removal system, and provide a human-computer interaction interface to implement the coal mine comprehensive mining working face dust removal method, parameter setting and remote connection to the hydraulic support controller (22).

10. The coal mine fully mechanized mining face dust removal system according to claim 9, characterized in that: The method for removing dust from a fully-mechanized coal mining working face comprises: Step S1: the sensing unit cyclically and continuously determines the dust concentration in the fully mechanized mining working surface; Step S2: When the dust concentration of the fully mechanized mining working surface 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 perform detection; Step S3: Detecting whether the liquid level of the filter medium in the liquid storage tank (1) reaches a set height, if so, proceeding to step S4; if not, continuously replenishing the liquid to the set height using the solenoid valve (24), the liquid inlet pipeline (2), and the liquid inlet (20), and then proceeding to step S4; Step S4: the control unit opens the main valve (23), and the liquid medium drives the hydraulic motor (4) to rotate in the forward direction according to the set direction and speed 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), thereby driving the fan (3) to rotate, thereby generating negative pressure, and sucking the dust-containing gas into the liquid storage tank (1) through the filter (18), the wind collecting hood (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 gas outlet (11) to enter the circulating airflow of the working surface; Step S7: When the sensing unit senses that the turbidity of the liquid in the liquid storage tank (1) exceeds a set upper limit, the control unit turns on the reversing switch of the main valve (23), drives the hydraulic motor (4) to rotate in the reverse direction and at a set speed, and links the liquid discharge pump (13) to extract the turbid liquid in the liquid storage tank (1), and discharges the turbid liquid from the liquid storage tank (1) through the liquid discharge pipeline (14) and the atomizing nozzle (15). When the liquid level in the liquid storage tank (1) reaches a set lower limit, the discharge stops; Step S8: the control unit opens the solenoid valve (24), introduces fresh filtration medium into the liquid storage tank (1) through the liquid inlet pipeline (2), and closes the solenoid valve (24) after the liquid level in the liquid storage tank (1) reaches the set upper limit; Step S9: loop into step S1; Step S10: When the dust concentration of the fully mechanized mining working surface is lower than the setting 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 enters step S1.

Images