Coal mine underground dust collecting and falling device

Abstract

The invention discloses a coal mine underground dust collection and fall device which comprises a shell, a first induced draft fan, a second induced draft fan and a dust collection assembly. The shell is provided with an air inlet and an air outlet. The first induced draft fan is used for leading air into the shell, and the second induced draft fan is used for leading the air out of the shell; the dust collection assembly comprises a dust collection pipe, an electrode bar and a power supply, the dust collection pipe is provided with a first air inlet and a first air outlet, the first air inlet is communicated with the air inlet, the first air outlet is communicated with the air outlet, one end of the electrode bar extends into the dust collection pipe, and the other end of the electrode bar extends into the dust collection pipe. And the positive electrode and the negative electrode of the power supply are electrically connected with the dust collection pipe and the electrode bar respectively. According to the dust suction and falling device, the problem that the dust falling efficiency is reduced due to desynchrony in spraying and dust falling is solved, so that the overall dust falling efficiency is improved, the problems of extra water consumption and energy consumption caused by spraying are also solved, and the underground operation efficiency of a coal mine is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining equipment, and particularly relates to a dust suction and dust reduction device for underground coal mines. Background Art

[0002] With the rapid development of China's coal mining industry, the dust problem in mine production has become increasingly prominent. The working environment in underground coal mines is harsh, and a large amount of coal dust is suspended in the air. These dusts not only pose a serious threat to the physical health of miners, but also may trigger coal mine safety accidents. Long-term inhalation of high-concentration dust, especially respirable dust, will cause miners to suffer from pneumoconiosis, and may even trigger coal dust explosions in severe cases, bringing great risks to the lives of miners and the safety of coal mine production.

[0003] In related technologies, spray dust reduction is a common method. However, traditional spray dust reduction devices usually rely on manual operation, and there may be problems such as the spray not being synchronized with the generation of dust, resulting in a reduction in dust reduction efficiency. In addition, spray dust reduction equipment has certain limitations in terms of atomization effect, water consumption, energy consumption, etc., and it is easy to wet the staff during the spraying process, affecting the operation efficiency. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0005] To this end, an embodiment of the present invention provides a dust suction and dust reduction device for underground coal mines.

[0006] The dust suction and dust reduction device for underground coal mines according to the embodiment of the present invention includes a housing, a first induced draft fan, a second induced draft fan, and a dust suction assembly. The housing has an air inlet and an air outlet. The first induced draft fan is arranged at the air inlet for introducing air into the housing, and the second induced draft fan is arranged at the air outlet for discharging air out of the housing.

[0007] The dust suction assembly is arranged in the housing. The dust suction assembly includes a dust suction pipe, an electrode rod, and a power supply. The dust suction pipe has a first air inlet and a first air outlet. The first air inlet is communicated with the air inlet, and the first air outlet is communicated with the air outlet. One end of the electrode rod extends into the dust suction pipe. The positive and negative electrodes of the power supply are electrically connected to the dust suction pipe and the electrode rod respectively, for forming a high-voltage electric field between the dust suction pipe and the electrode rod, so that the air in the dust suction pipe is ionized under the high-voltage electric field, and the dust in the air is charged and then migrates and deposits on the dust suction pipe.

[0008] In some embodiments, a dust storage box is provided inside the housing. The dust suction pipe is arranged on the dust storage box in the vertical direction. A first dust falling opening is formed at the bottom end of the dust suction pipe. The first dust falling opening is communicated with the dust storage box. An opening and closing door is arranged at the first dust falling opening. One end of the opening and closing door is pivotally connected to the dust suction pipe, and the other end of the opening and closing door is connected to the dust suction pipe through an elastic rope, so that the opening and closing door can close the first dust falling opening under the action of the elastic rope.

[0009] In some embodiments, the electrode rod is coaxially arranged with the dust suction pipe and is rotatably connected to the dust suction pipe. External threads are formed on the outer peripheral surface of the electrode rod. A cleaning nut is threadedly connected to the electrode rod. The outer peripheral surface of the cleaning nut fits on the inner peripheral surface of the dust suction pipe and is slidable along the axial direction of the dust suction pipe. The rotation of the electrode rod is used to drive the cleaning nut to move along the axial direction of the dust suction pipe to remove the dust adsorbed on the inner wall of the dust suction pipe.

[0010] In some embodiments, a top push rod is arranged at the bottom end of the cleaning nut. The top push rod is used for the cleaning nut to descend to the bottom end of the dust suction pipe to push the opening and closing door to open the first dust falling opening.

[0011] In some embodiments, the dust suction and dust reduction device for coal mines underground according to the embodiment of the present invention further includes a conductive slip ring. The conductive slip ring is rotatably arranged on the electrode rod and is located outside the dust suction pipe. The conductive slip ring is connected to the negative pole of the power supply through a wire.

[0012] In some embodiments, the dust suction and dust reduction device for coal mines underground according to the embodiment of the present invention further includes a driving motor, a driving gear and a driven gear. The driving motor is arranged on the dust suction pipe. The driving gear is sleeved on the output shaft of the driving motor. The driven gear is sleeved on the electrode rod and meshes with the driving gear.

[0013] In some embodiments, the number of the dust suction components is multiple. The multiple dust suction pipes are sequentially communicated. The electric field intensity in the multiple dust suction pipes decreases sequentially along the gas flow direction.

[0014] In some embodiments, the dust suction and dust reduction device for coal mines underground according to the embodiment of the present invention further includes a dust suction shell and a filter screen. The dust suction shell is arranged inside the housing. The dust suction shell has a second air inlet and a second air outlet. The second air inlet is communicated with the first air outlet. The second air outlet is communicated with the air outlet. The filter screen is arranged between the second air inlet and the second air outlet to filter the dust in the air.

[0015] In some embodiments, a diversion pipe is arranged between the first air outlet and the second air inlet. The outlet end of the diversion pipe extends into the dust suction shell;

[0016] The dust suction and dust reduction device for coal mines underground further includes a support frame, a rotating shaft, rotating blades and a cleaning rake. The support frame is arranged at the outlet end of the diversion pipe. The rotating shaft is coaxially arranged with the diversion pipe. One end of the rotating shaft extends into the diversion pipe, and the other end of the rotating shaft is placed outside the diversion pipe. The rotating shaft is rotatably connected to the support frame. The rotating blades are arranged on the rotating shaft and located inside the diversion pipe. The rotating blades are used to drive the rotating shaft to rotate under the action of air flow. The cleaning rake is connected to the rotating shaft and is used to clean the dust adsorbed on the filter screen when the rotating shaft rotates.

[0017] In some embodiments, a second dust fall opening is provided at the bottom of the dust suction shell, and the second dust fall opening is communicated with the dust storage box.

[0018] Compared with the traditional spray dust reduction device that relies on manual operation and may have problems such as the asynchrony between spraying and dust generation, the dust suction and dust reduction device of the present invention can process the dust in the air more timely and effectively. It makes the dust charged and deposited through a high-voltage electric field, and can actively and continuously purify the air entering the device, avoiding the problem of reduced dust reduction efficiency caused by asynchrony in spray dust reduction, thereby improving the overall dust reduction efficiency.

[0019] Traditional spray dust reduction equipment has certain limitations in aspects such as atomization effect, water consumption, and energy consumption, and it is easy to wet the staff during the spraying process, affecting the operation efficiency. While the present invention adopts a dust suction method, which does not involve the spraying process, there is no problem of wetting the staff, will not interfere with the normal operation of miners, and also avoids the problems of additional water use and energy consumption caused by spraying, effectively improving the operation efficiency in coal mines underground.

[0020] This device can effectively remove the dust in the air of coal mines underground, especially has a good adsorption effect on the respirable dust that causes miners to suffer from pneumoconiosis, reduces the risk of miners inhaling high-concentration dust, and protects the physical health of miners. At the same time, it reduces the concentration of coal dust in the air and reduces the possibility of coal dust explosion, providing a strong guarantee for the safe production of coal mines. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the dust suction and dust reduction device for coal mines underground according to an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the dust suction component according to an embodiment of the present invention.

[0023] Figure 3 It is a schematic internal structural diagram of the dust suction shell according to an embodiment of the present invention.

[0024] Reference Signs:

[0025] 100, Dust suction and dust reduction device for underground coal mine; 1, housing; 101, air inlet; 102, air outlet; 2, first induced draft fan; 3, second induced draft fan; 4, dust suction component; 401, dust suction pipe; 4011, first air inlet; 4012, first air outlet; 4013, first dust fall opening; 402, electrode rod; 403, power supply; 5, dust storage box; 6, opening and closing door; 7, elastic rope; 8, cleaning nut; 9, top push rod; 10, conductive slip ring; 11, drive motor; 12, driving gear; 13, driven gear; 14, dust suction housing; 1401, second air inlet; 1402, second air outlet; 1403, second dust fall opening; 15, filter screen; 16, guide pipe; 17, support frame; 18, rotating shaft; 19, rotating blade; 20, cleaning rake. Detailed implementation manners

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0027] As Figures 1 to 3 As shown, the dust suction and dust reduction device 100 for underground coal mine in the embodiment of the present invention includes a housing 1, a first induced draft fan 2, a second induced draft fan 3, and a dust suction component 4. The housing 1 has an air inlet 101 and an air outlet 102; the first induced draft fan 2 is arranged at the air inlet 101 for introducing air into the housing 1, and the second induced draft fan 3 is arranged at the air outlet 102 for drawing air out of the housing 1.

[0028] The dust suction component 4 is arranged in the housing 1. The dust suction component 4 includes a dust suction pipe 401, an electrode rod 402, and a power supply 403. The dust suction pipe 401 has a first air inlet 4011 and a first air outlet 4012. The first air inlet 4011 is communicated with the air inlet 101, and the first air outlet 4012 is communicated with the air outlet 102. One end of the electrode rod 402 extends into the dust suction pipe 401. The positive electrode and the negative electrode of the power supply 403 are electrically connected to the dust suction pipe 401 and the electrode rod 402 respectively, for forming a high-voltage electric field between the dust suction pipe 401 and the electrode rod 402, so that the air in the dust suction pipe 401 is ionized under the high-voltage electric field, and the dust in the air is charged and then migrates and deposits on the dust suction pipe 401.

[0029] When the dust suction and dust reduction device 100 for underground coal mine in the embodiment of the present invention is in use, the air containing dust in the underground coal mine enters the device through the air inlet 101 of the housing 1. This process is realized by means of the first induced draft fan 2 arranged at the air inlet 101. The first induced draft fan 2 provides power to introduce the air containing a large amount of coal dust in the underground coal mine operation environment into the interior of the housing 1.

[0030] The introduced air enters the dust suction pipe 401 of the dust suction assembly 4. The first air inlet 4011 of the dust suction pipe 401 is communicated with the air inlet 101 of the housing 1 to ensure the smooth entry of air. Since the positive and negative electrodes of the power supply 403 are electrically connected to the dust suction pipe 401 and the electrode rod 402 respectively, a high-voltage electric field is formed between the dust suction pipe 401 and the electrode rod 402. Under the action of the high-voltage electric field, the air in the dust suction pipe 401 is ionized, and the dust in the air will be charged. The charged dust will migrate under the action of the electric field force and finally deposit on the dust suction pipe 401, thereby realizing the adsorption and separation of dust in the air.

[0031] The air that has been processed by the dust suction assembly 4 to remove most of the dust passes through the first air outlet 4012 of the dust suction pipe 401 and finally discharges from the air outlet 102 of the housing 1. This process is powered by the second induced draft fan 3 provided at the air outlet 102 to draw the purified air into the underground coal mine environment.

[0032] Compared with the traditional spray dust suppression device that relies on manual operation and may have problems such as out-of-sync spraying and dust generation, the dust suction dust suppression device of the present invention can process dust in the air more timely and effectively. It charges and deposits the dust through a high-voltage electric field, can actively and continuously purify the air entering the device, and avoids the problem of reduced dust suppression efficiency caused by out-of-sync in spray dust suppression, thereby improving the overall dust suppression efficiency.

[0033] Traditional spray dust suppression equipment has certain limitations in terms of atomization effect, water consumption, energy consumption, etc., and it is easy to wet the staff during the spraying process, affecting the operation efficiency. The present invention adopts a dust suction method, which does not involve the spraying process, does not have the problem of wetting the staff, does not interfere with the normal operation of miners, and also avoids the problems of additional water use and energy consumption caused by spraying, effectively improving the operation efficiency in the underground coal mine.

[0034] The device can effectively remove dust in the air of the underground coal mine, especially has a good adsorption effect on respirable dust that causes miners to suffer from pneumoconiosis, reduces the risk of miners inhaling high-concentration dust, and protects the physical health of miners. At the same time, it reduces the concentration of coal dust in the air and reduces the possibility of coal dust explosion, providing a strong guarantee for the safe production of coal mines.

[0035] In some embodiments, a dust storage box 5 is provided inside the housing 1, and the dust suction pipe 401 is arranged vertically on the dust storage box 5. A first dust falling port 4013 is opened at the bottom end of the dust suction pipe 401, and the first dust falling port 4013 is communicated with the dust storage box 5. An opening and closing door 6 is provided at the first dust falling port 4013. One end of the opening and closing door 6 is pivotally connected to the dust suction pipe 401, and the other end of the opening and closing door 6 is connected to the dust suction pipe 401 through an elastic rope 7 so that the opening and closing door 6 can close the first dust falling port 4013 under the action of the elastic rope 7.

[0036] When the dust in the dust suction pipe 401 is charged under the action of a high-voltage electric field and deposited to a certain extent, as the dust accumulates in the dust suction pipe 401, its gravity gradually increases. When the gravity of the dust is greater than the pulling force of the elastic rope 7 on the opening and closing door 6, the opening and closing door 6 will open around one end pivotally connected to the dust suction pipe 401, and the dust deposited in the dust suction pipe 401 will fall into the lower dust storage box 5 through the first dust falling port 4013. After the dust falls, the downward force on the opening and closing door 6 decreases, and under the pulling force of the elastic rope 7, the opening and closing door 6 will close the first dust falling port 4013 again to prevent external air from directly entering the dust suction pipe 401 through the first dust falling port 4013, affecting the dust suction and dust reduction effects.

[0037] By providing the dust storage box 5 and the first dust falling port 4013, the dust adsorbed in the dust suction pipe 401 can be centrally collected into the dust storage box 5, facilitating subsequent unified treatment of the dust, and avoiding the random accumulation of dust in the device, which affects the normal operation of the device and the dust reduction effect. The design of the opening and closing door 6 and the elastic rope 7 enables the dust in the dust suction pipe 401 to automatically open the dust falling port for cleaning when it accumulates to a certain extent, without frequent manual intervention, realizing a certain degree of automatic cleaning, improving the convenience of use and work efficiency of the device. The opening and closing door 6 can close the first dust falling port 4013 under the action of the elastic rope 7, ensuring the sealing performance of the dust suction pipe 401, contributing to maintaining the stability of the high-voltage electric field in the dust suction pipe 401, enabling the processes of air ionization and dust charging to proceed continuously and stably, and thus ensuring the stability of the dust reduction effect.

[0038] In some embodiments, the electrode rod 402 is coaxially arranged with the dust suction pipe 401 and is rotatably connected to the dust suction pipe 401. External threads are provided on the outer peripheral surface of the electrode rod 402, and a cleaning nut 8 is threadedly connected to the electrode rod 402. The outer peripheral surface of the cleaning nut 8 is in contact with the inner peripheral surface of the dust suction pipe 401 and is slidable along the axial direction of the dust suction pipe 401. The rotation of the electrode rod 402 is used to drive the cleaning nut 8 to move along the axial direction of the dust suction pipe 401 to remove the dust adsorbed on the inner wall of the dust suction pipe 401.

[0039] When it is necessary to clean the dust adsorbed on the inner wall of the dust suction pipe 401. By rotating the electrode rod 402, the cleaning nut 8 will move along the axial direction of the electrode rod 402 under the action of the thread. Also, because the outer peripheral surface of the cleaning nut 8 is in contact with the inner peripheral surface of the dust suction pipe 401 and is slidable along the axial direction of the dust suction pipe 401, the cleaning nut 8 can come into full contact with the inner wall of the dust suction pipe 401 during the movement, thereby scraping off the dust adsorbed on the inner wall of the dust suction pipe 401. The scraped dust will, under the action of gravity, when it accumulates to a certain extent, cause the opening and closing door 6 to open and fall into the dust storage box 5.

[0040] The dust on the inner wall of the dust suction pipe 401 is removed by rotating the electrode rod 402 to drive the cleaning nut 8 to move axially along the dust suction pipe 401. Compared with the method of simply relying on the self-gravity of the dust to fall, it can more effectively remove the stubborn dust adsorbed on the inner wall of the dust suction pipe 401, further improving the cleaning degree of the dust suction pipe 401, ensuring the continuous and effective operation of the dust suction pipe 401, and thus enhancing the dust reduction efficiency of the entire dust reduction device.

[0041] Regularly cleaning the inner wall of the dust suction pipe 401 can prevent the dust from accumulating excessively and causing blockage of the dust suction pipe 401 or affecting the distribution of the high-voltage electric field. Maintaining the smoothness of the dust suction pipe 401 and the stability of the electric field helps the device to operate stably for a long time, reduces the failures caused by dust accumulation, and improves the reliability of the device.

[0042] In some embodiments, a top push rod 9 is provided at the bottom end of the cleaning nut 8. The top push rod 9 is used to push open the opening and closing door 6 at the bottom end of the dust suction pipe 401 when the cleaning nut 8 descends to open the first dust falling port 4013.

[0043] When the electrode rod 402 rotates to drive the cleaning nut 8 to move downward along the axis of the dust suction pipe 401, the top push rod 9 at the bottom end of the cleaning nut 8 will descend together with the cleaning nut 8. When the cleaning nut 8 descends to the bottom end of the dust suction pipe 401, the top push rod 9 will contact the opening and closing door 6 and apply a downward force. This force will overcome the pulling force of the elastic rope 7 on the opening and closing door 6, causing the opening and closing door 6 to open around the end where it is pivotally connected to the dust suction pipe 401, and the first dust falling port 4013 is opened. At this time, the dust scraped from the inner wall of the dust suction pipe 401 by the cleaning nut 8 and accumulated at the bottom of the dust suction pipe 401 will fall into the dust storage box 5 through the first dust falling port 4013. When the cleaning nut 8 rises and returns, the top push rod 9 no longer applies pressure to the opening and closing door 6, and the opening and closing door 6 closes the first dust falling port 4013 again under the pulling force of the elastic rope 7.

[0044] The setting of the top push rod 9 can ensure that even when the self-gravity of the dust is not sufficient to open the opening and closing door 6, the opening and closing door 6 can be pushed open by the action of the top push rod 9 when the cleaning nut 8 descends, so that the first dust falling port 4013 is opened, ensuring that the cleaned dust can smoothly fall into the dust storage box 5, preventing the dust from accumulating at the bottom of the dust suction pipe 401, and ensuring the normal operation of the dust suction pipe 401 and the continuity of the dust reduction effect.

[0045] In some embodiments, the underground coal mine dust suction and reduction device 100 of the present invention embodiment further includes a conductive slip ring 10. The conductive slip ring is rotatably arranged on the electrode rod 402 and is located outside the dust suction pipe 401. The conductive slip ring 10 is connected to the negative pole of the power supply 403 through a wire.

[0046] During the operation of the device, the electrode rod 402 is in a rotatable working state within the dust suction pipe 401. The power supply 403 needs to continuously provide a negative voltage to the electrode rod 402 to maintain a high-voltage electric field between the dust suction pipe 401 and the electrode rod 402. The conductive slip ring 10 is rotatably arranged on the electrode rod 402 and is located outside the dust suction pipe 401, and is connected to the negative electrode of the power supply 403 through a wire. When the electrode rod 402 rotates, the conductive slip ring 10 can rotate relative to the electrode rod 402 while ensuring good electrical contact with the electrode rod 402, thus avoiding problems such as winding and pulling of the wire connecting the electrode rod 402 and the negative electrode of the power supply 403 due to the rotation of the electrode rod 402, ensuring that the voltage of the negative electrode of the power supply 403 can be stably and continuously transmitted to the electrode rod 402, keeping the high-voltage electric field stable at all times, and ensuring the normal progress of the air ionization and dust charging processes.

[0047] In some embodiments, the underground coal mine dust suction and dust reduction device 100 of the embodiment of the present invention further includes a driving motor 11, a driving gear 12, and a driven gear 13. The driving motor 11 is arranged on the dust suction pipe 401, the driving gear 12 is sleeved on the output shaft of the driving motor 11, and the driven gear 13 is sleeved on the electrode rod 402 and meshes with the driving gear 12.

[0048] When the underground coal mine dust suction and dust reduction device 100 needs to use the cleaning nut 8 to remove dust, the driving motor 11 is started, and the output shaft of the driving motor 11 starts to rotate. Since the driving gear 12 is sleeved on the output shaft of the driving motor 11, the driving gear 12 will rotate together with the output shaft. And the driven gear 13 is sleeved on the electrode rod 402 and meshes with the driving gear 12. According to the principle of gear transmission, the rotation of the driving gear 12 will drive the driven gear 13 to rotate, and then the electrode rod 402 will rotate within the dust suction pipe 401. The rotation of the electrode rod 402 will drive the cleaning nut 8 threadedly connected thereto to move along the axial direction of the dust suction pipe 401 to clean the dust adsorbed on the inner wall of the dust suction pipe 401.

[0049] Through the transmission system composed of the driving motor 11, the driving gear 12, and the driven gear 13, a stable rotational power can be provided for the electrode rod 402. Compared with other complex or unstable driving methods, gear transmission has the advantages of high transmission efficiency, accurate transmission ratio, and reliable operation, which can ensure that the electrode rod 402 rotates stably at a predetermined speed and direction, so that the cleaning nut 8 can effectively remove the dust on the inner wall of the dust suction pipe 401, improving the working stability and reliability of the dust reduction device.

[0050] In some embodiments, the number of the dust suction assemblies 4 is multiple, and the multiple dust suction pipes 401 are connected in sequence, and the electric field intensity in the multiple dust suction pipes 401 decreases in sequence along the gas flow direction.

[0051] After the air containing dust is introduced into the housing 1 by the first induced draft fan 2, it first enters the first dust suction pipe 401. Inside the first dust suction pipe 401, due to the highest electric field strength therein, the air is rapidly ionized under the action of the strong high-voltage electric field. A large amount of dust is quickly charged, and under the action of the electric field force, it quickly migrates and deposits on the inner wall of the dust suction pipe 401. As the air continues to flow, it enters the subsequent dust suction pipes 401 that are connected in sequence. Because the electric field strength in the subsequent dust suction pipes 401 decreases in sequence, the remaining dust that was not completely adsorbed in the previous dust suction pipe 401 will continue to be charged and deposited on the inner wall of the corresponding dust suction pipe 401 under the action of a relatively weak electric field. After being processed step by step by multiple dust suction pipes 401, the dust in the air is continuously adsorbed and removed, and finally the purified air is discharged from the device through the second induced draft fan 3 from the air outlet 102.

[0052] The design of multiple dust suction pipes 401 connected in sequence with decreasing electric field strength can perform hierarchical treatment on the dust in the air. In the dust suction pipe 401 with a large electric field strength, most of the dust is quickly and efficiently adsorbed first, removing the main amount of dust in the air. And the subsequent dust suction pipes 401 with a smaller electric field strength then perform further fine treatment on the remaining small amount of dust, so that the dust in the air can be removed more comprehensively and thoroughly, improving the dust removal efficiency and quality of the entire dust removal device, and making the discharged air cleaner.

[0053] If a high-strength electric field is used throughout the dust removal process, although the dust removal effect can be guaranteed, a large amount of electric energy will be consumed. By setting multiple dust suction pipes 401 with decreasing electric field strength, on the premise of ensuring the dust removal effect, the electric field strength is reasonably distributed, avoiding unnecessary high energy consumption. A strong electric field is used in the initial stage with a high dust concentration, and a weaker electric field is used in the subsequent stage when the amount of dust gradually decreases, realizing the optimization of energy consumption and reducing the operating cost of the device.

[0054] In some embodiments, the underground coal mine dust suction and dust removal device 100 of the embodiment of the present invention further includes a dust suction housing 14 and a filter screen 1. The dust suction housing 14 is arranged inside the housing 1. The dust suction housing 14 has a second air inlet 1401 and a second air outlet 1402. The second air inlet 1401 is communicated with the first air outlet 4012, and the second air outlet 1402 is communicated with the air outlet 102. The filter screen 15 is arranged between the second air inlet 1401 and the second air outlet 1402 to filter the dust in the air.

[0055] After the air is processed by the dust suction assembly 4, it flows out from the first air outlet 4012 of the dust suction pipe 401 and then enters the second air inlet 1401 of the dust suction housing 14. During the process of the air flowing from the second air inlet 1401 to the second air outlet 1402, it needs to pass through the filter net 15 arranged between the two. The filter net 15 intercepts and filters the remaining dust in the air, blocks the dust on the filter net 15, and the further purified air passes through the second air outlet 1402 and is finally discharged into the coal mine underground environment from the air outlet 102 of the housing 1 under the action of the second induced draft fan 3.

[0056] Although the dust suction assembly 4 has adsorbed most of the dust in the air, there may still be a small amount of fine dust remaining. The setting of the filter net 15 can perform secondary filtration on these residual dusts, further reduce the dust content in the air, make the discharged air cleaner, better meet the requirements for air quality in the coal mine underground, provide a healthier working environment for miners, and also further reduce the risk of coal dust explosion.

[0057] In some embodiments, a diversion pipe 16 is provided between the first air outlet 4012 and the second air inlet 1401, and the outlet end of the diversion pipe 16 extends into the dust suction housing 14.

[0058] The coal mine underground dust suction and dust reduction device 100 further includes a support frame 17, a rotating shaft 18, rotating blades 19 and a cleaning rake 20. The support frame 17 is arranged at the outlet end of the diversion pipe 16, the rotating shaft 18 is coaxially arranged with the diversion pipe 16, one end of the rotating shaft 18 extends into the diversion pipe 16, and the other end of the rotating shaft 18 is located outside the diversion pipe 16. The rotating shaft 18 is rotatably connected to the support frame 17, the rotating blades 19 are arranged on the rotating shaft 18 and are located inside the diversion pipe 16, and the rotating blades 19 are used to drive the rotating shaft 18 to rotate under the action of the air flow. The cleaning rake 20 is connected to the rotating shaft 18 and is used to clean the dust adsorbed on the filter net 15 when the rotating shaft 18 rotates.

[0059] When the air processed by the dust suction pipe 401 flows out from the first air outlet 4012 and flows through the diversion pipe 16 towards the second air inlet 1401 of the dust suction housing 14, the air flow has a certain flow rate and energy in the diversion pipe 16. The rotating blades 19 located inside the diversion pipe 16 start to rotate under the impact of the air flow. Since the rotating blades 19 are installed on the rotating shaft 18, the rotation of the rotating blades 19 drives the rotating shaft 18 to rotate around its own axis. The rotating shaft 18 is rotatably installed on the support frame 17 at the end of the diversion pipe 16, ensuring the stability of the rotation.

[0060] The other end of the rotating shaft 18 extends outside the diversion pipe 16 and is connected to the cleaning rake 20. As the rotating shaft 18 rotates, the cleaning rake 20 also makes a circular motion, cleaning the filter net 15 disposed between the second air inlet 1401 and the second air outlet 1402 in the dust suction housing 14. The cleaning rake 20 scrapes off the dust adsorbed on the filter net 15, preventing excessive accumulation of dust on the filter net 15 and affecting the ventilation and filtering effects of the filter net 15. The air further filtered by the filter net 15 is discharged from the second air outlet 1402 and finally flows out of the device through the air outlet 102 of the housing 1.

[0061] The continuous cleaning of the filter net 15 by the cleaning rake 20 can timely remove the dust adsorbed on the filter net 15, avoiding dust accumulation resulting in filter blockage. Filter blockage will increase the resistance of air flow, reduce the ventilation volume, and affect the working efficiency of the entire dust reduction device. By timely cleaning, the permeability of the filter net 15 is maintained, enabling air to pass through smoothly, thereby improving the filtering efficiency. Reducing the long-term accumulation of dust on the filter net 15 can also reduce the risk of damage to the filter net caused by dust abrasion, corrosion, etc., extend the service life of the filter net 15, and reduce the frequency and cost of replacing the filter net.

[0062] Utilize the airflow energy to achieve automatic cleaning. This design cleverly uses the energy of the airflow in the diversion pipe 16 to drive the rotation of the rotating blades 19 and the rotating shaft 18, and then drives the cleaning rake 20 to clean the filter net 15 without additional power equipment. This not only saves energy and equipment costs, but also simplifies the structure of the device, improves the reliability and stability of the device, and avoids affecting the cleaning function due to the failure of additional power equipment.

[0063] In some embodiments, a second dust falling port 1403 is provided at the bottom of the dust suction housing 14, and the second dust falling port 1403 is communicated with the dust storage box 5.

[0064] When the dust reduction device is operating, the air preliminarily treated by the dust suction assembly 4 enters the dust suction housing 14 through the diversion pipe 16. When the air is further filtered by the filter net 15, the dust is intercepted and adsorbed on the filter net 15. Subsequently, the cleaning rake 20 drives the filter net 15 to clean under the drive of the rotating shaft 18, scraping off the adsorbed dust. These scraped-off dust will naturally fall under the action of gravity. Since the second dust falling port 1403 is provided at the bottom of the dust suction housing 14 and the second dust falling port 1403 is communicated with the dust storage box 5, the dust will fall into the dust storage box 5 through the second dust falling port 1403 for centralized collection.

[0065] There is

[0066] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0067] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0068] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0070] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0071] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill 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 suction and dust reduction device for underground coal mines, characterized in that, Comprising: A housing having an air inlet and an air outlet; A first induced draft fan and a second induced draft fan, the first induced draft fan being provided at the air inlet for introducing air into the housing, and the second induced draft fan being provided at the air outlet for drawing air out of the housing; A dust collection assembly provided in the housing, the dust collection assembly including a dust collection pipe, an electrode rod, and a power supply. The dust collection pipe has a first air inlet and a first air outlet. The first air inlet is communicated with the air inlet, and the first air outlet is communicated with the air outlet. One end of the electrode rod extends into the dust collection pipe. The positive and negative electrodes of the power supply are electrically connected to the dust collection pipe and the electrode rod respectively, for forming a high-voltage electric field between the dust collection pipe and the electrode rod, so that the air in the dust collection pipe is ionized under the high-voltage electric field, and the dust in the air is charged and then migrates and deposits on the dust collection pipe.

2. The dust suction and dust reduction device for underground coal mines according to claim 1, wherein, A dust storage box is provided in the housing. The dust collection pipe is arranged vertically on the dust storage box. A first dust falling port is opened at the bottom end of the dust collection pipe, and the first dust falling port is communicated with the dust storage box. An opening and closing door is provided at the first dust falling port. One end of the opening and closing door is pivotally connected to the dust collection pipe, and the other end of the opening and closing door is connected to the dust collection pipe through an elastic rope, so that the opening and closing door can close the first dust falling port under the action of the elastic rope.

3. The coal mine underground dust suction and dust suppression device according to claim 2, characterized in that, The electrode rod is coaxially arranged with the dust collection pipe and is rotatably connected to the dust collection pipe. External threads are provided on the outer peripheral surface of the electrode rod, and a cleaning nut is threadedly connected to the electrode rod. The outer peripheral surface of the cleaning nut is attached to the inner peripheral surface of the dust collection pipe and is slidable along the axial direction of the dust collection pipe. The rotation of the electrode rod is used to drive the cleaning nut to move along the axial direction of the dust collection pipe to remove the dust adsorbed on the inner wall of the dust collection pipe.

4. The coal mine underground dust suction and dust suppression device according to claim 3, characterized in that A top push rod is provided at the bottom end of the cleaning nut. The top push rod is used for the cleaning nut to descend to the bottom end of the dust collection pipe to push the opening and closing door to open the first dust falling port.

5. The dust suction and dust reduction device for underground coal mines according to claim 3, characterized in that, It further includes a conductive slip ring, which is rotatably arranged on the electrode rod and located outside the dust collection pipe. The conductive slip ring is connected to the negative electrode of the power supply through a wire.

6. The coal mine underground dust suction and dust suppression device according to claim 5, wherein It further includes a driving motor, a driving gear, and a driven gear. The driving motor is arranged on the dust collection pipe. The driving gear is sleeved on the output shaft of the driving motor, and the driven gear is sleeved on the electrode rod and meshes with the driving gear.

7. The dust suction and dust reduction device for underground coal mines according to claim 1, wherein The number of the dust collection assemblies is multiple, and the multiple dust collection pipes are sequentially communicated. The electric field intensity in the multiple dust collection pipes decreases sequentially along the gas flow direction.

8. The coal mine underground dust suction and dust reduction device according to claim 2, characterized in that, It further includes a dust collection shell and a filter screen. The dust collection shell is arranged in the housing. The dust collection shell has a second air inlet and a second air outlet. The second air inlet is communicated with the first air outlet, and the second air outlet is communicated with the air outlet. The filter screen is arranged between the second air inlet and the second air outlet to filter the dust in the air.

9. The coal mine underground dust suction and dust suppression device according to claim 8, wherein A diversion pipe is provided between the first air outlet and the second air inlet. The outlet end of the diversion pipe extends into the dust collection shell; The coal mine underground dust suction and dust reduction device further includes a support frame, a rotating shaft, rotating blades and a cleaning rake. The support frame is arranged at the outlet end of the diversion pipe. The rotating shaft is coaxially arranged with the diversion pipe. One end of the rotating shaft extends into the diversion pipe, and the other end of the rotating shaft is placed outside the diversion pipe. The rotating shaft is rotatably connected to the support frame. The rotating blades are arranged on the rotating shaft and located inside the diversion pipe. The rotating blades are used to drive the rotating shaft to rotate under the action of air flow. The cleaning rake is connected to the rotating shaft and is used to clean the dust adsorbed on the filter screen when the rotating shaft rotates.

10. The coal mine underground dust suction and dust reduction device according to claim 9, characterized in that, A second dust falling port is arranged at the bottom of the dust suction shell, and the second dust falling port is communicated with the dust storage box.

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