Dedusting system for driving face

Abstract

The invention discloses a driving working face dust removal system which comprises a square dust removal pipeline, a dust removal device, a dust removal device, a dust removal device, a dust removal device, a dust removal device and a dust removal device, and is characterized in that one end of the dust removal device is internally provided with an air draft fan; the dust removal assembly comprises a pair of filter meshes, two pairs of transmission racks, a first driving motor, a transmission shaft, a pair of gears and a pair of connecting rods, and when the first driving motor rotates, the filter meshes to be cleaned are driven to penetrate through the corresponding passing holes to extend out of the dust removal pipeline; meanwhile, the other filter mesh is driven to penetrate through the corresponding passing hole and extend into the dust removal pipeline; and the liftable flushing spray head is arranged on one side of the dust removal pipeline and is positioned on one side, close to the air draft fan, of the pair of filter meshes so as to flush the filter meshes extending out of the dust removal pipeline. The dust removal system has the beneficial effects that shutdown can be avoided as much as possible to clean the to-be-cleaned filter mesh, the dust removal efficiency of the dust removal system is guaranteed, and then the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of dust removal equipment, and more specifically, to a dust removal system for a tunneling working face. Background Art

[0002] At present, during the coal mine tunnel excavation work, a large amount of dust is generated at the excavation working face, which endangers the health of construction workers. Therefore, it is necessary to reduce the dust generated at the excavation working face to minimize the threat of dust to the health of construction workers. At present, a variety of dust reduction equipment or dust reduction systems have been studied in the prior art. For example, the patent with application number 201710400171.7 discloses an adhesive dust capture system for dust removal on a coal mine excavation working face, including a ventilation power subsystem, an adhesive dust capture subsystem and a control subsystem. The adhesive dust capture subsystem includes a dust removal chamber, a glue spraying device, a glue spraying pump, a water spraying device, a water spraying pump and a dust removal filter grid, and the dust removal filter grid is evenly coated with dust catching adhesive; the air outlet end of the ventilation power subsystem is fluidly connected with the air inlet end of the dust removal chamber, and the air outlet end of the dust removal chamber is fluidly connected with the atmospheric fluid; the dust removal filter grid is arranged in the dust removal chamber, and the air inlet end and the air outlet end of the dust removal chamber are respectively arranged on both sides of the mesh of the dust removal filter grid, and the gas flowing from the air inlet end of the dust removal chamber to the air outlet end of the dust removal chamber flows through the mesh of the dust removal filter grid, which can efficiently remove dust in the dust airflow and reduce the phenomenon of excessive humidity in spray dust reduction. However, in the above structure, when the filter grid can no longer effectively adhere to dust, the control device needs to be used to shut down the ventilation power subsystem, and then the control device controls the water spray device and the water spray pump to clean the dust removal filter grid, and then the glue spray device is controlled to spray the dust-catching glue on the filter grid to continue to remove dust from the coal mine excavation working face. It can be seen that when the filter grid needs to be cleaned, the above structure needs to be shut down for cleaning. During this period of shutdown and cleaning, the dust on the coal mine excavation working face cannot be removed, affecting the excavation efficiency. Summary of the invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide a dust removal system for an excavation working face, which is designed with a pair of filter grids. Among the pair of filter grids, one filter grid forms a filter grid to be cleaned, and the other filter grid forms a spare filter grid. When the filter grid needs to be cleaned, the filter grid to be cleaned is pulled out of the dust removal pipe, and the spare filter grid is pulled into the dust removal pipe at the same time. In this way, the excavation efficiency can be avoided as much as possible due to the shutdown for cleaning the filter grid and the impact on the excavation efficiency, and the dust removal efficiency of the dust removal system can be maintained.

[0004] In order to achieve these purposes and other advantages according to the present invention, a dust removal system for an excavation working face is provided, comprising:

[0005] A square dust removal duct has an exhaust fan at one end, and a pair of passage holes are opened on the side wall of the dust removal duct;

[0006] A dust removal component, which is located on a side of the exhaust fan away from the air suction port, the dust removal component includes a pair of filter screens with dust-catching glue, two pairs of transmission racks, a first drive motor, a transmission shaft, a pair of gears, and a pair of connecting rods. The first drive motor is arranged above the dust removal duct, and the transmission shaft is coaxially fixedly connected to the output shaft of the first drive motor. The bottom end of the transmission shaft rotates in a sealed manner through the dust removal duct and then extends out of the bottom of the dust removal duct. The gears are coaxially fixedly connected to the shaft bodies above and below the dust removal duct, and each gear is meshed with the transmission rack at both ends along the length direction of the dust removal duct. Along the length direction of the dust removal duct, the connecting rod is connected between a pair of transmission racks located on the same side. A pair of connecting rods, a pair of filter screens, and a pair of passage holes correspond to each other one by one, and the connecting rod is connected to the side wall of the corresponding filter screen, so that when the first drive motor rotates, the filter screen to be cleaned is driven to pass through the corresponding passage hole and extend out of the dust removal duct, and at the same time, another filter screen is driven to pass through the corresponding passage hole and extend into the dust removal duct.

[0007] A flushing nozzle driven to rise and fall is arranged on one side of the dust removal pipeline and is located on one side of a pair of filter screens close to the exhaust fan to flush the filter screens extending out of the dust removal pipeline.

[0008] Preferably, sealing plates are connected to both ends of the filter mesh along the length direction perpendicular to the dust removal duct, the connecting rod is connected to the filter mesh through the sealing plates, the sealing plates are vertically connected to the filter mesh so that the projections of a pair of sealing plates and the filter mesh on the horizontal plane are H-shaped, a sealing layer is applied on the side wall of the sealing plate close to the filter mesh, the width of the sealing plate is greater than the width of the through hole, so that when the filter mesh extends out of the dust removal duct, the sealing plate abuts against the inner wall of the dust removal duct where the through hole is located to form a seal.

[0009] Preferably, the excavation working face dust removal system also includes a protective box, which is located on one side of the dust removal duct along its width direction, and the side wall of the protective box close to the dust removal duct is an installation wall, and the installation wall is connected to the side wall of the dust removal duct provided with a through hole, and an installation hole is opened on the installation wall, and the dust removal duct is connected with the interior of the protective box through the through hole and the installation hole, and a pair of avoidance holes are provided on the top and bottom of the protective box, and along the length direction of the dust removal duct, a pair of avoidance holes on the same side correspond to the connecting rod on that side, and another pair of avoidance holes on the same side correspond to the connecting rod on that side, so that the connecting rod slides along the corresponding pair of avoidance holes.

[0010] Preferably, the structure of the flushing nozzle that drives the lifting and lowering specifically includes: a threaded shaft, a second drive motor, a mounting box, a limit rod, a glue spray head, and the second drive motor are arranged above the protective box, the output shaft of the second drive motor is coaxially connected to the threaded shaft, the bottom end of the threaded shaft rotates through the top of the protective box and is rotatably connected to the bottom of the protective box, the mounting box is screwed on the threaded shaft, the limit rod is slidably connected to the threaded shaft, and a plurality of glue spray heads and the flushing nozzles are alternately arranged on the mounting box.

[0011] Preferably, the dust removal assembly, the driven lifting flushing nozzle, and the protective box constitute a dust removal mechanism, and there are multiple dust removal mechanisms, which are axially spaced apart along the dust removal pipe.

[0012] Preferably, a pair of transmission racks located below the dust removal duct are provided with baffles near the side walls and top of the flushing nozzle.

[0013] Preferably, a hanging ring is provided on the top of the dust removal duct.

[0014] Preferably, the transmission rack includes a plate body and a baffle plate provided on the side wall of the plate body close to the flushing nozzle, the baffle plate is inclined downward by 10 to 15 degrees, and teeth are provided on the side wall of the plate body below the baffle plate.

[0015] The present invention has at least the following beneficial effects:

[0016] By arranging a dust removal duct, an exhaust fan, a passage hole, a filter grille, a transmission rack, a first drive motor, a transmission shaft, a gear, and a connecting rod, during use, in an initial state, one of a pair of filter grilles extends into the dust removal duct to perform dust removal work, and the other filter grille extends out of the dust removal duct to form a spare filter grille; when the filter grille in the dust removal duct has a poor dust removal effect and needs to be cleaned, the first drive motor is started to drive the two pairs of transmission racks to move, thereby driving a pair of connecting rods to move in reverse, and finally driving the filter grille to be cleaned to extend out of the dust removal duct at the same time. When the filter screen is cleaned, the dust collecting effect of the filter screen can be restored as much as possible. In actual use, the dust collecting glue on the filter screen can be a washable glue or directly refer to the dust collecting glue disclosed in the patent application number 201710400171.7. On the whole, it can avoid stopping the machine to clean the filter screen to be cleaned and affecting the excavation efficiency, and can maintain the dust removal efficiency of the dust removal system, thereby improving the construction efficiency.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic front view of a dust removal system for a tunneling working face according to one of the technical solutions of the present invention;

[0019] Figure 2 A side cross-sectional schematic diagram of a dust removal system for a tunneling working face according to one of the technical solutions of the present invention;

[0020] Figure 3 This is a schematic diagram of a front and cross-sectional view of the structure of a protective box according to one of the technical solutions of the present invention;

[0021] Figure 4 A schematic top view of a dust removal system for a tunneling working face according to one of the technical solutions of the present invention;

[0022] Figure 5 This is a top view of the connection structure between the filter grid and the sealing plate according to one of the technical solutions of the present invention.

[0023] Figure markings: 1-dust removal duct; 2-filter grid; 3-exhaust fan; 4-first drive motor; 5-transmission shaft; 6-transmission rack; 7-baffle; 8-sealing plate; 9-connecting rod; 10-protection box; 11-threaded shaft; 12-installation box; 13-limiting rod; 14-water spray head; 15-glue spray head; 16-hose; 17-second drive motor; 18-gear; 19-avoidance hole. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0026] like Figure 1-5 As shown, the present invention provides a dust removal system for a tunneling working face, comprising:

[0027] A square dust removal duct 1 is provided with an exhaust fan 3 at one end thereof, and a pair of passage holes are opened on the side wall of the dust removal duct 1;

[0028] A dust removal component is located on the side of the exhaust fan 3 away from the air suction port. The dust removal component includes a pair of filter screens 2 with dust-catching glue, two pairs of transmission racks 6, a first drive motor 4, a transmission shaft 5, a pair of gears 18, and a pair of connecting rods 9. The first drive motor 4 is arranged above the dust removal duct 1. The transmission shaft 5 is coaxially fixed to the output shaft of the first drive motor 4. The bottom end of the transmission shaft 5 rotates in a sealed manner through the dust removal duct 1 and then extends out of the bottom of the dust removal duct 1. The transmission shaft 5 is coaxially fixed to the shaft body above and below the dust removal duct 1. The gears 18, each gear 18 is meshed with the transmission racks 6 at both ends along the length direction of the dust removal duct 1, and the connecting rod 9 is connected between a pair of transmission racks 6 located on the same side along the length direction of the dust removal duct 1, and the pair of connecting rods 9, the pair of filter meshes 2, and the pair of passage holes correspond to each other, and the connecting rod 9 is connected to the side wall of the corresponding filter mesh 2, so that when the first drive motor 4 rotates, the filter mesh 2 to be cleaned is driven to pass through the corresponding passage hole and extend out of the dust removal duct 1, and at the same time, another filter mesh 2 is driven to pass through the corresponding passage hole and extend into the dust removal duct 1;

[0029] A flushing nozzle driven to rise and fall, which is arranged on one side of the dust removal duct 1 and located on one side of a pair of filter screens 2 close to the exhaust fan 3, so as to flush the filter screens 2 extending out of the dust removal duct 1;

[0030] In the above technical solution, the dust removal pipe 1 is a horizontal pipe, the cross section of the dust removal pipe 1 is square, that is, the dust removal pipe 1 is a square pipe, the direction of the dust removal pipe 1 along the depth of the tunnel is its length direction, and the direction perpendicular to the length is the width direction, one end of the dust removal pipe 1 close to the excavation working face is an air suction port, and the other end is an air outlet, and an exhaust fan 3 is provided near the air suction port in the dust removal pipe 1, which is used to suck the dust airflow at the excavation working face into the dust removal pipe 1, and a pair of passage holes are opened on one side wall of the dust removal pipe 1, and the pair of passage holes are located on the side of the exhaust fan 3 away from the air suction port;

[0031] The dust removal assembly includes a pair of filter grids 2, two pairs of transmission racks 6, a first drive motor 4, a transmission shaft 5, a pair of gears 18, and a pair of connecting rods 9. The filter grids 2 are evenly coated with dust-catching glue, which can be an existing washable dust-catching glue, or a dust-catching adhesive disclosed in Patent No. 201710400171.7; a pair of filter grids 2 respectively form a filter grid 2 to be cleaned and a spare filter grid 2, a pair of filter grids 2 corresponds to a pair of passage holes, and the filter grids 2 slide in and out of the dust removal duct 1 along the corresponding passage holes. When the filter grid 2 is located in the dust removal duct 1, the filter grid 2 is adapted to the size of the inside of the dust removal duct 1 to capture the dust airflow entering the dust removal duct 1 as comprehensively as possible. Preferably, the top of the filter grid 2 is slidably connected to the inner top wall of the dust removal duct 1. In actual use, the filter grid 2 can be installed in a frame plate to facilitate the installation of the filter grid 2;

[0032] The first drive motor 4 is arranged just above the dust removal duct 1 and is located near the end where the passage hole is located. The first drive motor 4 is installed on the dust removal duct 1 through a bracket (not shown in the figure). The output shaft of the first drive motor 4 is coaxially connected with a transmission shaft 5. The transmission shaft 5 rotates in a sealed manner through the top and bottom of the dust removal duct 1 and then extends out of the dust removal duct 1. The shaft body of the transmission shaft 5 located inside the dust removal duct 1 is located between a pair of filter grids 2. Gears 18 are coaxially fixed to the shaft bodies of the transmission shaft 5 located above and below the dust removal duct 1. Each gear 18 is meshed with a transmission rack 6 at both ends along the length direction of the dust removal duct 1. Along the length direction of the dust removal duct 1, the gears 18 are located on the same side. The pair of transmission racks 6 are connected to the side wall near the passage hole with the connecting rod 9, and the pair of connecting rods 9 correspond to the pair of filter screens 2. The connecting rods 9 are connected to the side wall near the dust removal duct 1 with the filter screens 2, so that when the first drive motor 4 is started, the pair of connecting rods 9 are driven to move in reverse, thereby pulling the filter screen 2 to be cleaned out of the dust removal duct 1 and pulling the spare filter screen 2 into the dust removal duct 1 at the same time, so as to continue the dust removal work; wherein, in order to facilitate the movement of the transmission rack 6, a sliding rod can be arranged between the transmission rack 6 and the dust removal duct 1, one end of the sliding rod is connected to the transmission rack 6, and the other end is a sliding end, and a pulley is installed at the sliding end, and the pulley is slidably connected to the outer wall of the dust removal duct 1;

[0033] The flushing nozzle driven to be lifted may include a driving lifting rod and a flushing nozzle. The flushing nozzle may be a water spray head 14 or a water spray head 14 plus a glue spray head 15. The telescopic end of the driving lifting rod is connected to the flushing nozzle, and the flushing nozzle is connected to an external water supply component and / or a glue spray component. When the flushing nozzle is a water spray head 14, the dust-catching glue is a washable dust-catching glue. Flushing the filter grid 2 to be cleaned can remove most of the dust and restore the dust removal function of the filter grid 2. When the flushing nozzle is a water spray head 14 and a glue spray head 15, the filter grid 2 is first cleaned by the water spray head 14, and then the filter grid 2 is sprayed with glue by the glue spray head 15. The dust-catching glue and the water for flushing the water spray head can refer to the dust-catching adhesive and the cleaning solution disclosed in Patent No. 201710400171.7.

[0034] In this technical solution, during use, in the initial state, one of the pair of filter screens 2 extends into the dust removal pipe 1 to perform dust removal work, and the other filter screen extends out of the dust removal pipe 1 to form a spare filter screen 2. When the dust removal effect of the filter screen 2 in the dust removal pipe 1 is poor and needs to be cleaned, the first drive motor 4 is started to drive the two pairs of transmission racks 6 to move, thereby driving the pair of connecting rods 9 to move in the opposite direction, and finally driving the filter screen 2 to be cleaned to extend out of the dust removal pipe 1 while driving the spare filter screen 2 into the dust removal pipe 1. Then, the flushing nozzle is raised and lowered in the vertical direction to flush the filter screen 2 extending out of the dust removal pipe 1, so that the filter screen 2 can be cleaned and the dust collection effect of the filter screen 2 can be restored as much as possible.

[0035] The beneficial effect obtained by adopting this technical solution is that by arranging the dust removal duct 1, the exhaust fan 3, the pass hole, the filter screen 2, the transmission rack 6, the first drive motor 4, the transmission shaft 5, the gear 18, and the connecting rod 9, it is possible to avoid stopping the machine to clean the filter screen 2 to be cleaned and affecting the excavation efficiency, and the dust removal efficiency of the dust removal system can be maintained, thereby improving the construction efficiency.

[0036] In another technical solution, both ends of the filter grid 2 along the length direction of the vertical dust removal duct 1 are connected with sealing plates 8, the connecting rod 9 is connected to the filter grid 2 through the sealing plates 8, the sealing plates 8 are vertically connected to the filter grid 2, so that the projection of a pair of sealing plates 8 and the filter grid 2 on the horizontal plane is H-shaped, the sealing plate 8 is provided with a sealing layer on the side wall close to the filter grid 2, the width of the sealing plate 8 is greater than the width of the passage hole, so that when the filter grid 2 extends out of the dust removal duct 1, the sealing plate 8 and the dust removal duct where the passage hole is located are in contact with each other. The inner wall of the dust duct 1 abuts to form a seal; in this technical solution, specifically, the sealing plate 8 is vertically arranged, and one of the sealing plates 8 is located in the dust removal duct 1, and the other sealing plate 8 is located outside the dust removal duct 1. The pair of sealing plates 8 are respectively connected to the two ends of the filter grid 2 along the width direction of the dust removal duct 1, and a sealing layer is applied on the side wall of the sealing plate 8 close to the filter grid 2. The width direction of the sealing plate 8 is consistent with the length direction of the dust removal duct 1. The projection of the connection structure of the pair of sealing plates 8 and the filter grid 2 on the horizontal plane is H-shaped (such as Figure 5 As shown), when in use, the first drive motor 4 is started, and after the filter mesh 2 to be cleaned is pulled out of the dust removal duct 1, the sealing plate 8 located in the dust removal duct 1 abuts against the inner side wall where the passage hole is located. Since the width of the sealing plate 8 is greater than the width of the passage hole, the sealing plate 8 can close the passage hole. At this time, the sealing plate 8 located outside the dust removal duct 1 on the other replacement filter mesh 2 (spare filter mesh 2) entering the dust removal duct 1 abuts against the outer side wall of the dust removal duct 1 where the passage hole is located, so as to seal the passage hole there; during the use of the filter mesh 2 located in the dust removal duct 1, the sealing plate 8 abuts against the inner side wall of the dust removal duct 1 away from the passage hole, so as to fully remove dust;

[0037] In this technical solution, when in use, the first driving motor 4 is started to drive the filter mesh 2 to be cleaned to extend out of the dust removal pipe 1. At this time, the sealing plate 8 corresponding to the filter mesh 2 to be cleaned and located in the dust removal pipe 1 abuts against the inner wall of the dust removal pipe 1 where the corresponding passage hole is located to close the passage hole. At the same time, the sealing plate 8 located outside the dust removal pipe 1 on the other filter mesh 2 entering the dust removal pipe 1 abuts against the outer wall of the dust removal pipe 1 where the corresponding passage hole is located to close the passage hole. In this way, the dust airflow can be ensured to flow through the filter mesh 2 as much as possible, and the dust airflow can be prevented from flowing out from the passage hole, thereby improving the dust removal effect.

[0038] In another technical solution, the excavation working face dust removal system further includes a protection box 10, the protection box 10 is located on one side of the dust removal pipe 1 along its width direction, the side wall of the protection box 10 close to the dust removal pipe 1 is a mounting wall, the mounting wall is connected to the side wall of the dust removal pipe 1 provided with a passage hole, a mounting hole is opened on the mounting wall, the dust removal pipe 1 is connected with the interior of the protection box 10 through the passage hole and the mounting hole, a pair of avoidance holes 19 are provided on the top and bottom of the protection box 10, along the length direction of the dust removal pipe 1, a pair of avoidance holes 19 on the same side correspond to the connecting rod 9 on that side, and another pair of avoidance holes 19 on the same side correspond to the connecting rod 9 on that side, so that the connecting rod 9 slides along the corresponding pair of avoidance holes 19;

[0039] In the above technical scheme, the protection box 10 is arranged on one side of the dust removal duct 1, and the protection box 10 is located on the side close to the passage hole. The side wall of the protection box 10 close to the passage hole is an installation wall, and the installation wall is provided with an installation hole. The installation wall is connected to the side wall where the passage hole of the dust removal duct 1 is located, so that the installation hole covers the passage hole, so that the filter grille 2 passes through the corresponding passage hole and the installation hole and enters the protection box 10; a pair of avoidance holes 19 are provided on the top and bottom of the protection box 10, and along the length direction of the dust removal duct 1, a pair of avoidance holes 19 on the same side form a pair of front avoidance holes 19, and another pair of avoidance holes 19 on the same side form a pair of rear avoidance holes 19, and the pair of front avoidance holes 19 and the pair of rear avoidance holes 19 correspond to a pair of connecting rods 9, and the connecting rods 9 pass through the corresponding avoidance holes 19 and then move along the corresponding avoidance holes 19, so that under the action of the first drive motor 4, the filter grille 2 to be cleaned is pulled out of the dust removal duct 1;

[0040] The beneficial effect obtained by adopting this technical solution is that, by designing the protection box 10, the protection of the filter grid 2 pulled out of the dust removal duct 1 can be improved, and the cleaning operation is also facilitated.

[0041] In another technical solution, the structure of the flushing nozzle driven to rise and fall specifically includes: a threaded shaft 11, a second drive motor 17, an installation box 12, a limit rod 13, a plurality of glue spray heads 15, the second drive motor 17 is arranged above the protection box 10, and a plurality of water spray heads 14, the output shaft of the second drive motor 17 is coaxially connected with the threaded shaft 11, the bottom end of the threaded shaft 11 rotates through the top of the protection box 10 and is rotatably connected to the bottom of the protection box 10, the installation box 12 is screwed on the threaded shaft 11, the limit rod 13 is slidably connected to the threaded shaft 11, and the plurality of glue spray heads 15 and the plurality of water spray heads 14 are alternately arranged on the installation box 12;

[0042] In the above technical scheme, specifically, the second drive motor 17 is arranged above the protective box 10, and the second drive motor 17 is installed on the top of the protective box 10 through a bracket (not shown in the figure), and the output shaft of the second drive motor 17 is coaxially connected with a threaded shaft 11, and the threaded shaft 11 rotates through the top of the protective box 10 and is rotatably connected to the inner bottom wall of the protective box 10, and the threaded shaft 11 is screwed with an installation box 12, and the installation box 12 is arranged along the width direction of the dust removal duct 1, and a limiting rod 13 is also slidably penetrated on the installation box 12, and the top end of the limiting rod 13 is connected to the inner top wall of the protective box 10, and the bottom end is connected to the inner bottom wall of the protective box 10, so as to ensure that the installation box 12 moves along the threaded shaft 11, thereby driving the water spray head 14 and the glue spray head 15 on the installation box 12 along. Lift and lower in the vertical direction; wherein the water spray head 14 is connected with an external water supply component through a hose 16 to spray water on the filter mesh 2 to be cleaned, and the glue spray head 15 is connected with an external glue supply component to spray glue on the filter mesh 2 after water cleaning. The water supply component and the glue supply component are both existing structures and will not be described in detail here; the technical solution has the beneficial effect that a structure of a flushing spray head that drives lifting is provided by setting a threaded shaft 11, a second drive motor 17, an installation box 12, a glue spray head 15, and a limit rod 13. When in use, when the filter mesh 2 to be cleaned is pulled out of the dust removal box, the water spray head 14 is first used to rinse the filter mesh 2 with clean water, and then the glue spray head 15 is used to spray glue on the filter mesh 2 to ensure the dust catching effect of the filter mesh 2, thereby improving the cleaning effect.

[0043] In another technical solution, the dust removal assembly, the driven and lifted flushing nozzle, and the protective box 10 constitute a dust removal mechanism. There are multiple dust removal mechanisms, and the multiple dust removal mechanisms are axially spaced apart along the dust removal pipe 1; specifically, the dust removal assembly and the driven and lifted flushing nozzle form a dust removal mechanism. There are multiple dust removal mechanisms, which can be three, four, five, six, etc., and are designed according to actual conditions. When in use, multiple dust removal mechanisms remove dust from the passing dust airflow, thereby improving the dust removal effect.

[0044] In another technical solution, a pair of transmission racks 6 located below the dust removal duct 1 are provided with baffles 7 near the top of the side wall near the flushing nozzle; specifically, the baffles 7 are arranged on the side wall of the transmission rack 6 near the exhaust fan 3, and below the baffles 7 are teeth (for meshing transmission with the gear 18). By designing the baffles 7, it is possible to avoid the glue from dripping onto the transmission rack 6 during glue spraying, thereby affecting the transmission effect of the transmission rack 6.

[0045] In another technical solution, a lifting ring is provided on the top of the dust removal pipe 1 (the lifting ring is not shown in the figure); specifically, when in use, a slide rail can be laid on the tunnel in advance, and then the entire device can be suspended on the slide rail at the top of the tunnel through the lifting ring, and slide along with the extension of the tunnel excavation.

[0046] In another technical solution, the transmission rack 6 includes a plate body and a baffle 7 arranged on the side wall of the plate body near the flushing nozzle, the baffle 7 is inclined downward by 10 to 15 degrees, and teeth are provided on the side wall of the plate body below the baffle 7; specifically, the baffle 7 is inclined downward (the inclined baffle 7 is not shown in the figure), its high end is connected to the plate body near the top, and its low end is suspended in the air. When in use, the flushing nozzle is used to flush and clean the filter mesh 2 to be cleaned, and then the glue spray head 15 is used to spray glue on the flushed filter mesh 2 to maintain its dust catching effect, wherein the baffle 7 can block the dripping glue to minimize the influence of the glue on the transmission rack 6; in actual use, a liquid collecting device can also be provided at the outlet of the baffle 7 to prevent the glue from scattering at will.

[0047] The number of equipment and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the excavation face dust removal system of the present invention will be obvious to those skilled in the art.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The excavation working face dust removal system is characterized by: include: A square dust removal duct has an exhaust fan at one end, and a pair of passage holes are opened on the side wall of the dust removal duct; A dust removal component, which is located on a side of the exhaust fan away from the air suction port, the dust removal component includes a pair of filter screens with dust-catching glue, two pairs of transmission racks, a first drive motor, a transmission shaft, a pair of gears, and a pair of connecting rods. The first drive motor is arranged above the dust removal duct, and the transmission shaft is coaxially fixedly connected to the output shaft of the first drive motor. The bottom end of the transmission shaft rotates in a sealed manner through the dust removal duct and then extends out of the bottom of the dust removal duct. The gears are coaxially fixedly connected to the shaft bodies above and below the dust removal duct, and each gear is meshed with the transmission rack at both ends along the length direction of the dust removal duct. Along the length direction of the dust removal duct, the connecting rod is connected between a pair of transmission racks located on the same side. A pair of connecting rods, a pair of filter screens, and a pair of passage holes correspond to each other one by one, and the connecting rod is connected to the side wall of the corresponding filter screen, so that when the first drive motor rotates, the filter screen to be cleaned is driven to pass through the corresponding passage hole and extend out of the dust removal duct, and at the same time, another filter screen is driven to pass through the corresponding passage hole and extend into the dust removal duct. A flushing nozzle driven to rise and fall is arranged on one side of the dust removal pipeline and is located on one side of a pair of filter screens close to the exhaust fan to flush the filter screens extending out of the dust removal pipeline.

2. The excavation face dust removal system according to claim 1, characterized in that: The filter grid is connected to sealing plates at both ends along the length direction of the dust removal duct vertically, the connecting rod is connected to the filter grid through the sealing plates, the sealing plates are vertically connected to the filter grid so that the projections of a pair of sealing plates and the filter grid on the horizontal plane are H-shaped, a sealing layer is applied on the side wall of the sealing plate close to the filter grid, the width of the sealing plate is greater than the width of the through hole, so that when the filter grid extends out of the dust removal duct, the sealing plate abuts against the inner wall of the dust removal duct where the through hole is located to form a seal.

3. The excavation face dust removal system according to claim 2, characterized in that: The excavation working face dust removal system also includes a protective box, which is located on one side of the dust removal duct along its width direction. The side wall of the protective box close to the dust removal duct is an installation wall, and the installation wall is connected to the side wall of the dust removal duct with a through hole. The installation wall is provided with a mounting hole, and the dust removal duct is connected with the interior of the protective box through the through hole and the installation hole. A pair of avoidance holes are provided on the top and bottom of the protective box. Along the length direction of the dust removal duct, a pair of avoidance holes on the same side correspond to the connecting rod on that side, and another pair of avoidance holes on the same side correspond to the connecting rod on that side, so that the connecting rod slides along the corresponding pair of avoidance holes.

4. The excavation face dust removal system according to claim 3, characterized in that: The structure of the flushing nozzle that drives the lifting and lowering specifically includes: a threaded shaft, a second driving motor, a mounting box, a limit rod, a glue spray head, and the second driving motor are arranged above the protective box, the output shaft of the second driving motor is coaxially connected to the threaded shaft, the bottom end of the threaded shaft rotates through the top of the protective box and is rotatably connected to the bottom of the protective box, the mounting box is screwed on the threaded shaft, the limit rod is slidably connected to the threaded shaft, and a plurality of glue spray heads and the flushing nozzle are alternately arranged on the mounting box.

5. The excavation working face dust removal system according to claim 4, characterized in that: The dust removal assembly, the driven and lifted flushing nozzle, and the protective box constitute a dust removal mechanism. There are multiple dust removal mechanisms, and the multiple dust removal mechanisms are arranged at intervals along the axial direction of the dust removal pipeline.

6. The excavation face dust removal system according to claim 3, characterized in that: A pair of transmission racks located below the dust removal pipeline are provided with baffles near the side walls and top of the flushing nozzle.

7. The excavation face dust removal system according to claim 1, characterized in that: A hanging ring is arranged on the top of the dust removal pipeline.

8. The excavation face dust removal system according to claim 1, characterized in that: The transmission rack includes a plate body and a baffle plate arranged on the side wall of the plate body close to the flushing nozzle, the baffle plate is inclined downward by 10 to 15 degrees, and teeth are arranged on the side wall of the plate body below the baffle plate.

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