Double-drum coal mining machine and dust removal method

Abstract

This invention relates to the field of coal mining technology, specifically to a dust collection device for a double-drum coal mining machine. The device includes a second drive shaft, a dust collection pipe, an oil film mesh assembly, a connecting pipe, a corrugated connecting pipe, a guide pipe, a converging pipe, a bag filter box, a negative pressure pipe, and a negative pressure compressor. The first and second drums are connected to the coal mining machine body. One end of the second drive shaft is connected to a collecting trough. A positioning hole is provided on one side of the collecting trough, through which the dust collection pipe is connected. The lower end of the connecting pipe is connected to a corrugated connecting pipe, the lower end of which is connected to a guide pipe, and the lower end of the guide pipe is connected to a converging pipe. One end of the converging pipe is connected to a bag filter box, and a negative pressure pipe is connected through one side of the bag filter box. One end of the negative pressure pipe is connected to a negative pressure compressor. This invention's double-drum coal mining machine dust collection device absorbs and collects dust during coal mining, preventing dust backflow and improving mining safety.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, specifically to a dust removal device and method for a double-drum coal mining machine. Background Technology

[0002] A coal mining machine is a large and complex system integrating mechanical, electrical, and hydraulic components. It typically consists of a cutting section, loading section, traction section, electric motor, operation control system, and auxiliary devices. It can reduce manual labor, improve safety, and achieve high output, high efficiency, and low consumption. Integrated mechanized coal mining generally uses a double-drum coal mining machine, without a kerf for cutting. Normal coal cutting involves the front drum cutting the roof coal and the rear drum cutting the floor coal. The hydraulic supports are connected to the face scraper conveyor using jacks, allowing for mutual fulcrum adjustment. After cutting coal to the upper level roadway of the working face, the coal mining machine can make another cut or return empty to clear loose coal.

[0003] During coal mining operations, large amounts of dust are often generated. If this dust is not treated promptly, it poses a significant threat to safe operations in coal mine roadways. Dust control relies heavily on appropriate dust removal equipment. This equipment can remove or collect solid or liquid particles from gases. Based on their mechanisms, dust removal equipment can be categorized into four main types: mechanical dust collectors, wet dust collectors, filtration dust collectors, and electrostatic dust collectors. While commonly used wet dust collectors are inexpensive, they only provide short-term dust suppression. The settled dust tends to repeatedly rise into the air, which is detrimental to long-term safe production operations in the roadways. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a dust removal device accompanying a double-drum coal mining machine to absorb and collect dust during coal mining, preventing dust backflow and improving the safety of coal mining.

[0005] An embodiment of the present invention also proposes a dust removal method.

[0006] The dust removal device for a dual-drum coal mining machine according to this invention includes: a first drum and a second drum, which are connected to the coal mining machine body and arranged opposite to each other along the length of the coal mining machine body; a second drive shaft, a dust removal pipe, an oil film mesh group, a connecting pipe, a corrugated connecting pipe, a guide pipe, a converging pipe, a bag filter dust collector, a negative pressure pipe, and a negative pressure compressor. The second drive shaft is connected through the side of the coal mining machine body, and one end of the second drive shaft is connected to a collection trough. The collection trough is equipped with... There is a collection tank with a positioning hole on one side. A dust removal pipe is connected through the positioning hole. A threaded ring is fixed inside the dust removal pipe. An oil film mesh is threadedly connected to the inner wall of the threaded ring. A connecting pipe is detachably connected to the top of the dust removal pipe. A corrugated connecting pipe is connected to the lower end of the connecting pipe. A guide pipe is connected to the lower end of the corrugated connecting pipe. A converging pipe is connected to the lower end of the guide pipe. A bag filter dust collector is connected to one end of the converging pipe. A negative pressure pipe is connected through one side of the bag filter dust collector. A negative pressure machine is connected to one end of the negative pressure pipe.

[0007] The dust removal equipment for a double-drum coal mining machine proposed in the embodiments of the present invention absorbs and collects dust during coal mining, avoids dust backflow, and improves the safety of coal mining.

[0008] In some embodiments, the accompanying dust removal equipment for the twin-drum coal mining machine further includes a first dust concentration sensor, a second dust concentration sensor, an assist component, a first drive shaft, a hydraulic support, and a lifting force rod. The first dust concentration sensor is connected to one end of the coal mining machine body adjacent to the second drum, and the second dust concentration sensor is located at the inlet of the bag filter dust collector.

[0009] The top of the coal mining machine body is provided with a matching groove, and an assist component runs through the interior of the matching groove. The assist component includes a first drive shaft, a hydraulic support is fixedly connected to the surface of the first drive shaft, and a lifting force rod runs through the upper end of the hydraulic support.

[0010] In some embodiments, the accompanying dust removal equipment for the double-drum coal mining machine further includes a hook and a movable connector. The bottom of the collection trough is fixed with a hook, and the movable connector passes through the inside of the hook. The movable connector is pivotally connected to the lifting force rod via a pin.

[0011] In some embodiments, the accompanying dust removal equipment for the twin-drum coal mining machine further includes a threaded connecting ring and a handheld ring. The oil film mesh group is composed of multiple oil film meshes arranged in a radial circumferential array. The handheld ring and the threaded connecting ring are respectively fixed to the upper and lower ends of the oil film mesh group, and the threaded connecting ring and the threaded ring are detachably connected.

[0012] In some embodiments, the accompanying dust removal equipment for the twin-drum coal mining machine further includes flanges and mating rings, and the dust removal pipe is a hollow rigid pipe.

[0013] A connection hole is provided through the top of the flange. A mating ring is connected to the end of the connecting pipe near the dust removal pipe. The end of the mating ring away from the connecting pipe is connected to the flange. The corrugated connecting pipe includes an upper connecting end and a lower connecting end. The upper connecting end is detachably connected to the connecting pipe. A connection hole is provided through the top of the flange.

[0014] In some embodiments, the bag filter box includes a box body, a dust filter bag, multiple guide plates and a sealing cover. The dust filter bag is installed inside, and the two ends of the dust filter bag are respectively connected to the guide plates. The guide plates are distributed with multiple guide holes. One side of each of the two guide plates is fixed with a retaining ring. The two retaining rings are respectively engaged with a negative pressure pipe and a converging pipe. The sealing cover is installed on the side of the box body.

[0015] In some embodiments, the dust removal equipment accompanying the twin-drum coal mining machine further includes an ultrasonic cleaning component, an oil spraying component, an oil collecting component, a temperature monitoring component, and a flow monitoring component. The ultrasonic cleaning component includes an ultrasonic cleaning element and an output pipe. The output end of the ultrasonic cleaning element is connected to the inlet of the output pipe, and the outlet of the output pipe is connected to the end of the ultrasonic cleaning component and the dust removal pipe near the connecting pipe. The oil spraying component is connected to the end of the dust removal pipe away from the connecting pipe. The temperature monitoring component is connected to the coal mining machine body, the flow monitoring component is connected to the outlet of the dust removal pipe, and the oil collecting component is connected to the bottom of the bag filter dust collector.

[0016] The dust removal method of this invention includes:

[0017] S1: The dust concentration around the coal mining machine is monitored by a dust concentration sensor. The first dust concentration is F1. When the first dust concentration is detected to be greater than 1250 ug / m³, the dust concentration is determined. 3 The dust around the coal mining machine is adsorbed and treated, and the pressure output by the negative pressure machine meets the following requirement:

[0018] Where P1 is the atmospheric pressure at the coal face, with units of kPa; Po is the standard atmospheric pressure, with units of kPa; and F1 is the unit of ug / m³. 3 Vo is the tunneling speed of the coal mining face, in m / h; V1 is the moving speed of the coal mining machine when cutting coal, in m / h; Fo is the safe dust concentration at the coal mining face, in μg / m³. 3 The rotational speed of the coal mining machine drums is adjusted such that the rotational speeds R1 of the first and second drums satisfy the following conditions: And Ro satisfies 3r / min<Ro<20r / min, where To is the average temperature of coal in the mine and T1 is the temperature of the working face;

[0019] S2: When the first dust concentration meets 350ug / m³3 ≤F1≤1250ug / m 3 The pressure output by the negative pressure machine satisfies A:

[0020] The rotational speed of the coal mining machine drum is not adjusted.

[0021] S3: When F1 satisfies F1 < 350ug / m 3 The ultrasonic cleaning component is activated to clean the oil film mesh. The cleaning time of the ultrasonic cleaning component on the oil film mesh is Ta, and Ta satisfies 30s≤Ta≤175s.

[0022] The dust removal method of the present invention absorbs and collects dust during coal mining, prevents dust backflow, and improves the safety of coal mining.

[0023] In some embodiments, S4: After the ultrasonic cleaning component performs ultrasonic cleaning on the oil film mesh group, the ultrasonic cleaning component sprays cleaning fluid onto the oil film mesh group, and the time for the ultrasonic cleaning component to spray cleaning fluid onto the oil film mesh group is Tb, and Tb satisfies 12s≤Tb≤35s.

[0024] S5: Turn off the negative pressure component and spray oil onto the oil film mesh multiple times. The time for spraying oil onto the oil film mesh in a single session is Tc, and Tc satisfies 10s≤Tc≤15s. The time interval between multiple sprays is Td, and 2min≤Td≤5min.

[0025] In some embodiments, S6: When the flow rate Q at the outlet of the dust removal pipe 11 is ≤ 2L / min, step S4 is executed to clean the oil film mesh group. After cleaning, the flow rate at the outlet of the dust removal pipe 11 is monitored. When the flow rate Q at the outlet of the dust removal pipe 11 is ≤ 2L / min, the oil film mesh group is disassembled and replaced, and the oil collection container is replaced at the same time. When the flow rate 5L / min at the outlet of the dust removal pipe 11 is > Q > 2L / min, step S5 is executed to clean the oil film mesh group. When Q is > 5L / min, step S1 is executed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the dust removal equipment accompanying the double-drum coal mining machine according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of a dust collector bag according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of a hydraulic support device according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the first roller according to an embodiment of the present invention.

[0030] Figure 5 yes Figure 4 An enlarged schematic diagram of region A in the middle.

[0031] Figure 6 This is a schematic diagram of an oil film mesh assembly according to an embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the dust removal pipe according to an embodiment of the present invention.

[0033] Figure 8 This is a schematic diagram of the lifting force-applying rod according to an embodiment of the present invention.

[0034] Figure 9 yes Figure 8 Enlarged schematic diagram of region B in the middle.

[0035] Figure label:

[0036] 1. Coal mining machine body; 2. First drum; 3. Second drum; 4. Matching groove; 5. First drive shaft; 6. Hydraulic support; 7. Movable connecting part; 8. Hook; 9. Collection trough; 10. Second drive shaft; 11. Dust removal pipe; 12. Flange; 121. Connecting hole; 13. Threaded ring; 14. Threaded connecting ring; 15. Oil film mesh group; 151. Handheld ring; 16. Butt ring; 17. Connecting pipe; 1 8. Upper connecting end; 19. Corrugated connecting pipe; 20. Lower connecting end; 21. Guide pipe; 22. Converging pipe; 23. Bag dust collector box; 24. Negative pressure pipe; 25. Negative pressure machine; 26. Dust collector bag; 261. Guide plate; 262. Guide hole; 263. Snap ring; 27. Encapsulation cover; 28. Lifting force bar; 29. ​​Positioning hole; 30. Oil collection component; 31. Oil spraying assembly; 40. Ultrasonic cleaning component. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The dust removal device accompanying the double-drum coal mining machine according to this embodiment of the invention includes: a first drum 2, a second drum 3, a second drive shaft 10, a dust removal pipe 11, an oil film mesh group 15, a connecting pipe 17, a corrugated connecting pipe 19, a guide pipe 21, a converging pipe 22, a bag filter dust collector 23, a negative pressure pipe 24, and a negative pressure machine 25. The first drum 2 and the second drum 3 are connected to the coal mining machine body 1. The first drum 2 and the second drum 3 are arranged opposite to each other along the length of the coal mining machine body 1. The second drive shaft 10 is connected through the side of the coal mining machine body 1. One end of the second drive shaft 10 is connected to a collection trough 9, and the collection trough 9 is provided with a collection trough. The body 9 has a positioning hole 29 on one side. A dust removal pipe 11 is connected through the positioning hole 29. A threaded ring 13 is fixed inside the dust removal pipe 11. An oil film mesh group 15 is threadedly connected to the inner wall of the threaded ring 13. A connecting pipe 17 is detachably connected to the top of the dust removal pipe 11. A corrugated connecting pipe 19 is connected to the lower end of the connecting pipe 17. A guide pipe 21 is connected to the lower end of the corrugated connecting pipe 19. A converging pipe 22 is connected to the lower end of the guide pipe 21. A bag dust collector 23 is connected to one end of the converging pipe 22. A negative pressure pipe 24 is connected through one side of the bag dust collector 23. A negative pressure machine 25 is connected to one end of the negative pressure pipe 24.

[0039] Specifically, such as Figures 1 to 9 The coal mining machine is a double-drum coal mining machine. A first drum 22 and a second drum 3 are respectively installed at the left and right ends of the machine body 11. The first drum 2 is used for digging and mining, and the second drum 3 is used for unloading coal.

[0040] The coal mining machine has a second drive shaft 10 at its front end. The right end of the second drive shaft 10 is connected to the collecting trough 9. The upper end of the collecting trough 9 has a collecting groove. The rear end of the collecting trough 9 has a positioning hole 29 for installing a dust removal pipe 11. The lower end of the dust removal pipe 11 is connected to the positioning hole 29. A threaded ring 13 is fixed inside the dust removal pipe 11. The threaded ring 13 is also connected to an oil film mesh group 15 to install the oil film mesh group 15 inside the dust removal pipe 11. The upper end of the dust removal pipe 11 is detachably connected to the upper end of a connecting pipe 17. The lower end of the connecting pipe 17 is connected to the lower end of a corrugated connecting pipe 19. The lower end of the corrugated connecting pipe 19 is connected to a guide pipe 21. The lower end of the guide pipe 21 is connected to a converging pipe 22. One end of the converging pipe 22 is connected to a bag filter dust collector 23. A negative pressure pipe 24 is connected through one side of the bag filter dust collector 23. One end of the negative pressure pipe 24 is connected to a negative pressure machine 25.

[0041] During underground dust removal, the negative pressure unit 25 is activated to change the pressure of the negative pressure pipe 24 to negative pressure, or to make the pressure of the negative pressure pipe 24 less than the inlet pressure of the dust removal pipe 11. This causes the dust removal pipe 11 to adsorb dust around the coal mining machine. During the dust adsorption process, dust is prone to backflow within the dust removal pipe 11 and the connecting pipe 17. The oil film mesh group 15 is suitable for adhering the dust, or in other words, the oil and gas molecules on the surface of the oil film mesh continuously encapsulate and intercept the dust, preventing the dust from flowing back to the working face cut.

[0042] It is understood that there are multiple positioning holes 29, which are arranged at intervals along the left and right direction on the collection tank. Correspondingly, there are multiple dust removal pipes 11, which correspond one-to-one with multiple positioning holes 29. There are also multiple connecting pipes 17 and corrugated connecting pipes 19, which correspond one-to-one with multiple corrugated connecting pipes 19.

[0043] This device, by setting up an oil film mesh group 15, continuously traps and intercepts dust with oil and gas molecules on the surface of the oil film mesh, preventing dust from flowing back through the dust collection pipe 11 and ensuring good dust removal effect. By setting up a retractable and extendable corrugated connecting pipe 19, it is easy to flexibly adjust the use angle and direction of the collection tank 9, which facilitates dust collection. By setting up a bag dust collector box 23 filled with negative pressure, dust can be further intercepted and collected. In conjunction with the oil film mesh group 15, dust entering the pipeline can be continuously collected, greatly reducing the risk of dust backflow after collection, and at the same time, the dust collection effect is good.

[0044] In some embodiments, the accompanying dust removal equipment for the twin-drum coal mining machine further includes a first dust concentration sensor, a second dust concentration sensor, an assist component, a first drive shaft 5, a hydraulic support 6, and a lifting force bar 28. The first dust concentration sensor is connected to one end of the coal mining machine body 1 adjacent to the second drum 3, and the second dust concentration sensor is located at the inlet of the bag filter dust collector 23.

[0045] The top of the coal mining machine body 1 is provided with a matching groove 4, and an assist component runs through the interior of the matching groove 4. The assist component includes a first drive shaft 5, and a hydraulic support 6 is fixedly connected to the surface of the first drive shaft 5. A lifting force rod 28 is connected through the upper end of the hydraulic support 6.

[0046] Specifically, such as Figures 1 to 9 The first dust concentration sensor is connected to the right end of the coal mining machine body 1, and the second dust concentration sensor is installed at the inlet of the bag filter box 23 for monitoring, thereby facilitating the confirmation of the dust collection effect.

[0047] Matching slot 4 can accommodate hydraulic support 6. The lower end of the hydraulic support rod is connected to the first drive shaft 5, which passes through matching slot 4. Thus, the first drive shaft 5 rotates in the left and right directions relative to the coal mining machine body 1. Lifting force rod 28 is connected to the lower end of hydraulic support 6, and the upper end of lifting force rod 28 is pivotally connected to the lower end of collecting trough 9. This facilitates changing the use angle and direction of collecting trough 9 in the vertical direction through the assist component, improving the convenience and flexibility of dust collection.

[0048] Furthermore, the accompanying dust removal equipment for the double-drum coal mining machine also includes a hook 8 and a movable connecting piece 7. The bottom of the collecting trough 9 is fixed with the hook 8, and the movable connecting piece 7 passes through the inside of the hook 8. The movable connecting piece 7 is pivotally connected to the lifting force rod 28 via a pin. This facilitates the fixing and limiting of the collecting trough 9, improving stability and safety.

[0049] In some embodiments, the accompanying dust removal equipment for the double-drum coal mining machine further includes a threaded connecting ring 14 and a handheld ring 151. The oil film mesh group 15 is composed of multiple oil film mesh groups 15 arranged in a radial circumferential array. The handheld ring 151 and the threaded connecting ring 14 are respectively fixed at the upper and lower ends of the oil film mesh group 15. The threaded connecting ring 14 and the threaded ring 13 are detachably connected.

[0050] Specifically, such as Figures 1 to 9 The dust removal pipe 11 is detachably connected to an oil film mesh assembly 15 via a threaded ring 13. Specifically, the lower end of the oil film mesh assembly is detachably connected to the threaded ring 13. The oil film mesh assembly 15 consists of multiple oil film mesh assemblies arranged in a radial circumferential array. A handheld ring 151 and a threaded connecting ring 14 are respectively fixed to the upper and lower ends of the oil film mesh assembly 15. The threaded connecting ring 14 is detachably connected to the threaded ring 1313, facilitating the installation and fixation of the oil film mesh assembly 15.

[0051] In some embodiments, the accompanying dust removal equipment for the twin-drum coal mining machine further includes a flange 12 and a mating ring 16, and the dust removal pipe 11 is a hollow rigid pipe.

[0052] A connection hole 121 is provided through the top of the flange 12. A mating ring 16 is connected to one end of the connecting pipe 17 near the dust removal pipe 11. The end of the mating ring 16 away from the connecting pipe 17 is connected to the flange 12. The corrugated connecting pipe 19 includes an upper connecting end 18 and a lower connecting end 20. The upper connecting end 18 is detachably connected to the connecting pipe 17.

[0053] Specifically, such as Figures 1 to 9A connecting pipe 17 is connected to a mating ring 16 at one end near the dust removal pipe 11. The mating ring 16 is fixedly connected to the flange 12 by screws. A corrugated connecting pipe 19 is connected to the lower end of the connecting pipe 17. The corrugated connecting pipe 19 includes an upper connecting end 18 and a lower connecting end 20. The upper connecting end 18 is detachably connected to the connecting pipe 17, and the lower end of the corrugated connecting pipe 19 is connected to a guide pipe 21. By setting the flange 12, the flange 12 is detachably connected to the dust removal pipe 11 and the connecting pipe 17, which facilitates the disassembly and cleaning of the dust removal pipe 11 and the connecting pipe 17, improving the stability and safety of the dust removal equipment accompanying the double-drum coal mining machine.

[0054] In some embodiments, the bag filter box 23 includes a box body, a dust filter bag 26, a plurality of guide plates 261, and a sealing cover 27. The dust filter bag 26 is installed inside the box body. The two ends of the dust filter bag 26 are respectively connected to the guide plates 261. The guide plates 261 are distributed with a plurality of guide holes 262. A retaining ring 263 is fixed on one side of each of the two guide plates 261. The two retaining rings 263 are respectively engaged with the negative pressure pipe 24 and the converging pipe 22. The sealing cover 27 is installed on the side of the box body.

[0055] Specifically, such as Figures 1 to 9 A negative pressure pipe 24 is connected through one side of the bag filter dust collector 23. A negative pressure pump 25 is connected to the left end of the negative pressure pipe 24. The input end of the coal mining machine is electrically connected to an external power supply. Dust collector bags 26 are installed inside the bag filter dust collector 23. Guide plates 261 are connected to both ends of the dust collector bags 26, and the guide plates 261 have multiple guide holes 262. A retaining ring 263 is fixed to one side of each of the two guide plates 261, and the two retaining rings 263 are respectively engaged with the negative pressure pipe 24 and the converging pipe 22. A sealing cover 27 is installed on the side of the bag filter dust collector 23 to seal it. By setting up the dust collector bag 26 box, dust can be collected, and the dust collector bags 26 inside the bag filter dust collector 23 perform filtration and dust removal.

[0056] In some embodiments, the dust removal equipment accompanying the double-drum coal mining machine further includes an ultrasonic cleaning component 40, an oil spraying assembly 31, an oil collecting component 30, a temperature monitoring component, and a flow monitoring component. The ultrasonic cleaning component 40 includes an ultrasonic cleaning element and an output pipe. The output end of the ultrasonic cleaning element is connected to the inlet of the dust removal pipe 11. The outlet of the dust removal pipe 11 is connected to the end of the ultrasonic cleaning component 40 and the dust removal pipe 11 near the connecting pipe 17. The oil spraying assembly 31 is connected to the end of the dust removal pipe 11 away from the connecting pipe 17. The temperature monitoring component is connected to the coal mining machine body 1. The flow monitoring component is connected to the outlet of the dust removal pipe 11. The oil collecting component 30 is connected to the bottom of the bag filter dust collector 23.

[0057] Specifically, such as Figures 1 to 9The ultrasonic cleaning component 40 is connected to the upper end of the dust removal pipe 11, and there is a preset angle between the ultrasonic cleaning component 40 and the dust removal pipe 11, which facilitates the ultrasonic cleaning component 40 to directly spray ultrasonic waves onto the oil film mesh group 15 for ultrasonic cleaning. The ultrasonic component can spray water or cleaning agent onto the oil film mesh group 15 to clean out the oil film and dust. After the ultrasonic cleaning is completed, the negative pressure machine 25 is stopped, and the oil spraying component 31 sprays oil. After the oil spraying is completed and the machine is left to stand for a preset time, it will continue to absorb dust.

[0058] The upper end of the oil collecting component 30 is connected to the bag dust collector 23, which facilitates the introduction of oil from the bag dust collector 23 into the oil collecting component 30. The temperature monitoring component monitors the temperature around the coal mining machine, and the flow monitoring component is located at the outlet of the dust removal pipe 11 to facilitate monitoring the flow rate at the outlet of the dust removal pipe 11. The flow rate of the dust removal pipe 11 during dust removal is monitored. When the flow rate is too low, the oil film mesh group 15 is cleaned and re-oiled to improve the stability and safety of the dust removal equipment accompanying the double drum coal mining machine.

[0059] The dust removal method of this invention includes:

[0060] S1: The dust concentration around the coal mining machine is monitored by a dust concentration sensor. The first dust concentration is F1. When the first dust concentration is detected to be greater than 1250 ug / m³, the dust concentration is determined. 3 The dust around the coal mining machine is adsorbed and treated. The pressure output of the negative pressure machine 25 meets the requirements of A. Where P1 is the atmospheric pressure at the coal face, with units of kPa; Po is the standard atmospheric pressure, with units of kPa; and F1 is the unit of ug / m³. 3 Vo is the tunneling speed of the coal mining face, in m / h; V1 is the moving speed of the coal mining machine when cutting coal, in m / h; Fo is the safe dust concentration at the coal mining face, in μg / m³. 3 To is the average temperature of coal underground, and T1 is the temperature of the coal face.

[0061] For adjusting the rotational speed of the coal mining machine drums, the rotational speeds R1 of the first drum 2 and the second drum 3 of the coal mining machine satisfy the following: And Ro satisfies 3r / min<Ro<20r / min, where To is the average temperature of coal in the mine and T1 is the temperature of the working face;

[0062] S2: When the first dust concentration meets 350ug / m³ 3 ≤F1≤1250ug / m 3 The pressure output of the negative pressure machine 25 meets the requirements of A. The rotational speed of the coal mining machine drum is not adjusted.

[0063] S3: When F1 satisfies F1 < 350ug / m3 The ultrasonic cleaning component 40 is turned on to clean the oil film mesh group 15. The cleaning time of the ultrasonic cleaning component 40 to the oil film mesh group 15 is Ta, and Ta satisfies 30s≤Ta≤175s.

[0064] Specifically, such as Figures 1 to 9 When the first dust concentration was detected to be F1 > 1250 ug / m³ 3 The dust around the coal mining machine is adsorbed and treated. The output pressure of the negative pressure machine 25 meets the requirements of A.

[0065] When the first dust concentration is F1 > 1250 ug / m 3 At that time, the temperature of the coal mining face is relatively high due to the operation of the machinery and the effects after coal mining. That is, the average temperature of the underground roadway is lower than the temperature of the coal mining face. When the temperature of the coal mining face rises, the dust concentration rises. At this time, the pressure difference between the output pressure of the negative pressure machine 25 and the inlet pressure of the dust removal pipe 11 should be increased to improve the adsorption force of dust, thereby adsorbing dust within a fixed time. The output pressure of the negative pressure machine 25 can be zero, negative, or positive. The output pressure of the negative pressure machine 25 can be changed according to the temperature change, thereby improving the regulation capability during dust adsorption and avoiding the increase in dust concentration caused by the temperature rise while the output pressure of the negative pressure machine 25 remains unchanged. At this time, the drum speed of the coal mining machine should be adjusted, that is, the higher the temperature, the lower the drum speed, thus reducing the dust concentration.

[0066] When the first dust concentration meets 350ug / m³ 3 ≤F1≤1250ug / m 3 The pressure output of the negative pressure machine 25 meets the requirements of A. The rotational speed of the coal mining machine drum is not adjusted. At this point, temperature has a relatively small impact on dust levels, so the temperature factor is no longer considered. This applies when F1 satisfies F1 < 350 ug / m 3 The ultrasonic cleaning component 40 is activated to clean the oil film mesh assembly 15. The cleaning time of the ultrasonic cleaning component 40 on the oil film mesh assembly 15 is Ta, and Ta satisfies 30s≤Ta≤175s. This removes dust from the oil film mesh assembly 15, improving its service life, facilitating repeated use, preventing clogging during use, and improving dust removal efficiency and stability.

[0067] Furthermore, after the ultrasonic cleaning component 40 performs ultrasonic cleaning on the oil film mesh assembly 15, the ultrasonic cleaning component 40 sprays cleaning fluid onto the oil film mesh assembly 15, and the spraying time is Tb, where Tb satisfies 12s ≤ Tb ≤ 35s. For example, the spraying time can be adjusted based on the flow data of the dust removal pipe 11 monitored by the flow monitoring component, and Tb can be 12s, 13s, 20s, or 35s. When the flow data is low, Tb can be 35s, thereby improving the cleaning time and cleaning effect on the oil film mesh assembly 15.

[0068] Furthermore, the negative pressure component is shut off, and the oil film mesh assembly 15 is sprayed with oil multiple times. The duration of each oil spraying is Tc, where Tc satisfies 10s ≤ Tc ≤ 15s. The time interval between multiple oil sprayings is Td, where 2min ≤ Td ≤ 5min. Tc can be 10s, 12s, 13s, or 15s, and Td can be 2min, 3min, 4min, or 5min. This facilitates oil coagulation and oil film formation, improving the stability and safety of the oil film mesh assembly 15.

[0069] Furthermore, when the flow rate Q at the outlet of the dust removal pipe 11 is ≤ 2L / min, step S4 is executed to clean the oil film mesh group 15. After cleaning, the flow rate at the outlet of the dust removal pipe 11 is monitored. When the flow rate Q at the outlet of the dust removal pipe 11 is ≤ 2L / min, the oil film mesh group 15 is disassembled and replaced, and the oil collection container is replaced at the same time. When the flow rate 5L / min at the outlet of the dust removal pipe 11 is > Q > 2L / min, step S5 is executed to clean the oil film mesh group 15. When Q is > 5L / min, step S1 is executed.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust removal device for a double-drum coal mining machine, characterized in that, include: Coal mining machine body; The first and second rollers are connected to the body of the coal mining machine and are arranged opposite to each other along the length of the coal mining machine body. The components include: second drive shaft, dust collection pipe, oil film mesh assembly, connecting pipe, corrugated connecting pipe, guide pipe, converging pipe, bag filter dust collector, negative pressure pipe, and negative pressure unit. A second drive shaft is connected through the side of the coal mining machine body. One end of the second drive shaft is connected to the collecting trough. The collecting trough has a collecting slot and a positioning hole on one side. A dust removal pipe is connected through the positioning hole. A threaded ring is fixed inside the dust removal pipe. An oil film mesh is threadedly connected to the inner wall of the threaded ring. A connecting pipe is detachably connected to the top of the dust removal pipe. A corrugated connecting pipe is connected to the lower end of the connecting pipe. A guide pipe is connected to the lower end of the corrugated connecting pipe. A converging pipe is connected to the lower end of the guide pipe. A bag filter dust collector is connected to one end of the bag filter dust collector. A negative pressure pipe is connected through the side of the bag filter dust collector. A negative pressure machine is connected to one end of the negative pressure pipe.

2. The dust removal equipment accompanying the double-drum coal mining machine according to claim 1, characterized in that, It also includes a first dust concentration sensor, a second dust concentration sensor, a power assist assembly, a first drive shaft, a hydraulic support, and a lifting force bar. The first dust concentration sensor is connected to the end of the coal mining machine body near the second drum, and the second dust concentration sensor is located at the inlet of the bag filter box. The top of the coal mining machine body is provided with a matching groove, and an assist component runs through the interior of the matching groove. The assist component includes a first drive shaft, a hydraulic support is fixedly connected to the surface of the first drive shaft, and a lifting force rod runs through the upper end of the hydraulic support.

3. The dust removal equipment accompanying the double-drum coal mining machine according to claim 2, characterized in that, It also includes a hook and a movable connector. The bottom of the collection trough is fixed with a hook, and the movable connector runs through the inside of the hook. The movable connector is pivotally connected to the lifting force rod by a pin.

4. The dust removal equipment accompanying the double-drum coal mining machine according to claim 3, characterized in that, It also includes a threaded connecting ring and a handheld ring. The oil film mesh group is composed of multiple oil film meshes arranged in a radial circumferential array. The handheld ring and the threaded connecting ring are respectively fixed at the upper and lower ends of the oil film mesh group. The threaded connecting ring and the threaded ring are detachably connected.

5. The dust removal equipment accompanying the double-drum coal mining machine according to claim 4, characterized in that, It also includes flanges and mating rings; the dust collection pipe is a hollow rigid pipe. A connection hole is provided through the top of the flange. A mating ring is connected to the end of the connecting pipe near the dust removal pipe. The end of the mating ring away from the connecting pipe is connected to the flange. The corrugated connecting pipe includes an upper connecting end and a lower connecting end. The upper connecting end is detachably connected to the connecting pipe.

6. The dust removal equipment accompanying the double-drum coal mining machine according to claim 5, characterized in that, The bag filter dust collector includes a box body, a dust collector bag, multiple guide plates, and a sealing cover. The dust collector bag is installed inside the box body. The two ends of the dust collector bag are respectively connected to the guide plates. The guide plates are distributed with multiple guide holes. Two guide plates are respectively fixed with a retaining ring on one side. The two retaining rings are respectively engaged with a negative pressure pipe and a converging pipe. The sealing cover is installed on the side of the box body.

7. The dust removal equipment accompanying the double-drum coal mining machine according to claim 6, characterized in that, It also includes an ultrasonic cleaning component, an oil spraying assembly, an oil collection component, a temperature monitoring component, and a flow monitoring component. The ultrasonic cleaning component includes an ultrasonic cleaning element and an output pipe. The output end of the ultrasonic cleaning element is connected to the inlet of the output pipe, and the outlet of the output pipe is connected to the end of the ultrasonic cleaning component and the dust removal pipe near the connecting pipe. The oil spraying assembly is connected to the end of the dust removal pipe away from the connecting pipe. The temperature monitoring component is connected to the coal mining machine body, the flow monitoring component is connected to the outlet of the dust removal pipe, and the oil collection component is connected to the bottom of the bag filter dust collector.

8. A dust removal method using the accompanying dust collector of a double-drum coal mining machine as described in any one of claims 2 to 7, characterized in that, include: S1: The dust concentration around the coal mining machine is monitored by a dust concentration sensor. The first dust concentration is F1. When the first dust concentration is detected to be greater than 1250 ug / m³, the dust concentration is determined. 3 The dust around the coal mining machine is adsorbed and treated, and the pressure output by the negative pressure machine meets the following requirement: Where P1 is the atmospheric pressure at the coal face, with units of kPa; Po is the standard atmospheric pressure, with units of kPa; and F1 is the unit of ug / m³. 3 Vo is the tunneling speed of the coal mining face, in m / h; V1 is the moving speed of the coal mining machine when cutting coal, in m / h; Fo is the safe dust concentration at the coal mining face, in μg / m³. 3 Where To is the average temperature of coal underground, and T1 is the temperature of the working face; The rotational speed of the coal mining machine drums is adjusted such that the rotational speeds R1 of the first and second drums satisfy the following conditions: And Ro satisfies 3r / min<Ro<20r / min, where To is the average temperature of coal in the mine and T1 is the temperature of the working face; S2: When the first dust concentration meets 350ug / m³ 3 ≤F1≤1250ug / m 3 The pressure output by the negative pressure machine satisfies A: The rotational speed of the coal mining machine drum is not adjusted. S3: When F1 satisfies F1 < 350ug / m 3 The ultrasonic cleaning unit is activated to clean the oil film mesh. The cleaning time of the ultrasonic cleaning unit on the oil film mesh is Ta, and Ta satisfies 30s≤Ta≤175s.

9. The dust removal method according to claim 8, characterized in that, include: S4: After the ultrasonic cleaning component performs ultrasonic cleaning on the oil film mesh group, the ultrasonic cleaning component sprays cleaning fluid onto the oil film mesh group, and the time for the ultrasonic cleaning component to spray cleaning fluid onto the oil film mesh group is Tb, and Tb satisfies 12s≤Tb≤35s. S5: Turn off the negative pressure machine and spray oil onto the oil film mesh multiple times. The time for spraying oil onto the oil film mesh in a single session is Tc, and Tc satisfies 10s≤Tc≤15s. The time interval between multiple oil sprays is Td, and 2min≤Td≤5min.

10. The dust removal method according to claim 9, characterized in that, include: S6: When the flow rate Q at the dust collector outlet is ≤ 2L / min, execute step S4 to clean the oil film mesh group. After cleaning, monitor the flow rate at the dust collector outlet. When the flow rate Q at the dust collector outlet is ≤ 2L / min, disassemble and replace the oil film mesh group, and replace the oil collection container at the same time. When the flow rate 5L / min > Q > 2L / min at the dust collector outlet, execute step S5 to clean the oil film mesh group. When Q > 5L / min, execute step S1.

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