Dust removal device of miner-bolter

Abstract

The utility model belongs to the technical field of safety and environmental protection of coal mine underground operation, and discloses a driving and bolting machine dust removal device which comprises an air suction pipeline, a filter screen cleaning mechanism used for cleaning a filter screen is installed on the air suction pipeline, and the filter screen cleaning mechanism comprises a filter screen cleaning assembly and an automatic filter screen replacing assembly. The filter screen cleaning assembly is used for rapidly cleaning a filter screen outside the air suction pipeline, and the automatic filter screen replacing assembly is used for controlling the filter screen to extend into the air suction pipeline to achieve a filtering effect; a dust removal mechanism is installed on the air suction pipeline, a fixing mechanism used for fixedly installing the air suction pipeline is installed on the air suction pipeline, and an air suction cover used for sucking dust is fixedly installed at the air inlet end of the air suction pipeline. By means of the mode, the filter screen can be fully automatically and rapidly replaced through the automatic filter screen replacing assembly, normal underground operation is not affected, after replacement, the filter screen can be fully automatically cleaned through the filter screen cleaning assembly, manual treatment is not needed, and manpower input is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the safety and environmental protection technical field of coal mine underground operation, concretely relates to a dust removal device of excavating anchor machine. BACKGROUND

[0002] At present, with the continuous progress of science and technology, the design and manufacturing technology of excavating anchor machine are also constantly innovating. In terms of dust removal, excavating anchor machine usually adopts wet dust removal, dry dust removal or comprehensive dust removal technology to reduce the dust concentration in the working environment. At the same time, based on advanced electrical control technology and automation technology, the dust removal system of excavating anchor machine also realizes intelligentization and automation, which can automatically adjust the dust removal efficiency according to the actual situation of the working environment, so as to more accurately control dust pollution.

[0003] Chinese patent CN216714378U discloses a kind of wet dust removal device and excavating anchor integrated machine, it includes: cutting arm, the front end of cutting arm is equipped with dust suction port, rear end is equipped with blow-off port, cutting arm is equipped with dust removal channel from front to back, dust removal channel is equipped with fan and spraying device, fan is used to dust suction, spraying device is used to spray and humidify inhaled smoke dust.

[0004] The wet dust removal device and excavating anchor integrated machine provided by the utility model can effectively remove dust and improve the working environment in the roadway. However, the filter screen in the dust removal channel of the test equipment needs to be replaced to maintain the filtering effect after long-term use, which not only affects the excavating anchor operation efficiency, but also requires additional manpower to clean the filter screen.

[0005] Therefore, the utility model designs a kind of dust removal device of excavating anchor machine to solve the above problems. UTILITY MODEL CONTENTS

[0006] In view of the above shortcomings of the prior art, the utility model provides a dust removal device of excavating anchor machine.

[0007] To achieve the above purpose, the utility model realizes the following technical scheme:

[0008] A dust removal device of excavating anchor machine includes an air suction pipeline, a filter screen cleaning mechanism is installed on the air suction pipeline for cleaning the filter screen; the filter screen cleaning mechanism includes two filter screen cleaning assemblies and a filter screen automatic replacement assembly. The two filter screen cleaning assemblies are symmetrically arranged on the upper and lower outer walls of the air suction pipeline and are used to quickly clean the filter screen exposed outside the air suction pipeline. The filter screen is arranged inside the air suction pipeline, and the upper and lower ends of the filter screen are respectively slid through and extend to the outside of the upper and lower sides of the air suction pipeline and are connected with the filter screen automatic replacement assembly. The filter screen automatic replacement assembly is installed on the outer wall of the air suction pipeline, and is used to control different areas of the filter screen to extend into the inside of the air suction pipeline to play a filtering effect.

[0009] The dust suction pipe is provided with a dust removal mechanism for dust removal of the suctioned dust;

[0010] The dust suction pipe is provided with a fixing mechanism for fixing the dust suction pipe;

[0011] The dust suction pipe is provided with a dust suction cover at the air inlet end for suction of dust, and the filter screen is located at the rear side of the dust suction cover.

[0012] Further, the filter screen cleaning assembly comprises a rotating rod, a hammer, a cam, a motor, a torsional spring and a fixed shaft, the upper and lower outer walls of the dust suction pipe are both hingedly provided with the rotating rod, the rear end of the rotating rod is fixedly connected with the hammer, the corner of the rotating rod is rotatably provided with the fixed shaft, one end of the torsional spring is fixedly connected with the outer wall of the rotating rod, and the other end of the torsional spring is fixedly connected with the outer wall of the fixed shaft; the hammer cleans the filter screen by hammering, the cam is slidably connected with the inner side of the rotating rod, the two motors are respectively located on the upper and lower outer walls of the dust suction pipe and are fixedly connected with the dust suction pipe, the cam is fixedly connected with the driving end of the motor, and the two fixed shafts are respectively fixedly connected with the upper and lower outer walls of the dust suction pipe.

[0013] Further, the filter screen automatic replacement assembly comprises a cylinder one, a cylinder two, a follower shaft one, a follower shaft two, a filter screen fixing plate one, a filter screen fixing plate two, a slot one and a slot two; the cylinder one is fixedly connected with the upper outer wall of the dust suction pipe, the driving end of the cylinder one is fixedly connected with the filter screen fixing plate one, the cylinder two is fixedly connected with the lower outer wall of the dust suction pipe, the driving end of the cylinder two is fixedly connected with the filter screen fixing plate two, the two ends of the filter screen extending to the outside of the dust suction pipe are respectively fixedly connected with the filter screen fixing plate one and the filter screen fixing plate two, the slot one and the slot two are respectively provided on the upper and lower sides of the dust suction pipe and through which the filter screen slides, the follower shaft one and the follower shaft two are rotatably arranged in the slot one and the slot two respectively, and the two ends of the filter screen are respectively rollingly connected with the follower shaft one and the follower shaft two; the bottom surface of the filter screen fixing plate one and the top surface of the filter screen fixing plate two are respectively slidably connected with the upper and lower outer walls of the dust suction pipe.

[0014] Further, the dust removal mechanism comprises a spraying assembly, a fan, an upper baffle, a lower baffle and an air outlet, the spraying assembly is arranged on the inner wall of the dust suction pipe, the fan is arranged at the rear end of the dust suction pipe and is fixedly connected with the dust suction pipe, the top of the upper baffle is fixedly connected with the inner top wall of the dust suction pipe, the bottom of the lower baffle is fixedly connected with the inner bottom wall of the dust suction pipe, the rear end top of the dust suction pipe is provided with the air outlet for discharging the dust-removed air, the lower baffle is located in front of the filter screen, the upper baffle is located in front of the lower baffle, and the fan is located behind the filter screen; the air outlet is located behind the fan.

[0015] Further, the spraying assembly comprises an atomizing nozzle, a first drain and a second drain, the atomizing nozzle is fixedly connected with the inner top wall of the air suction duct, the atomizing nozzle is connected with the water pump through a water pipe, the atomizing nozzle is located between the upper baffle and the air suction cover, the first drain is arranged on the inner bottom wall of the air suction duct and located below the atomizing nozzle, and the second drain is arranged on the inner bottom wall of the air suction duct and located between the lower baffle and the filter screen.

[0016] Further, the fixing mechanism comprises a mounting assembly, a fixing assembly and a clamping block, the mounting assembly is used for being connected with the mechanical arm of the anchor excavator, the fixing assembly is arranged at the top of the rear end of the air suction duct, and the mounting assembly and the fixing assembly are connected through the clamping block.

[0017] Further, the mounting assembly comprises a clamping block placing groove, a protruding block placing groove and a mounting plate, the protruding block placing groove is arranged on the mounting plate, two clamping block placing grooves are symmetrically arranged on the outer wall of the protruding block placing groove, the mounting plate is used for being fixedly connected with the mechanical arm of the anchor excavator.

[0018] The fixing assembly comprises a protruding block and two clamping block placing grooves, the protruding block is fixedly arranged on the left side of the air suction duct, the two clamping block placing grooves are arranged on the protruding block, the protruding block and the clamping block placing groove are inserted and matched, and screw holes for fixing screws are arranged on the upper sides of the clamping block and the mounting plate.

[0019] Compared with the prior art, the utility model has the advantages of:

[0020] 1、The filter screen automatic replacement assembly can realize automatic replacement of the filter screen, does not affect normal downhole operation, and can realize automatic cleaning of the filter screen through the filter screen cleaning assembly after replacement, so that manual processing is not needed and manpower investment is reduced.

[0021] 2、The fixing mechanism can realize convenient dismounting of the dust removal device and reduce the influence of normal anchor excavator operation due to maintenance and replacement of the dust removal device. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating labor.

[0023] Figure 1 A three-dimensional view of the anchor excavator dust removal device of the utility model Figure 1 ;

[0024] Figure 2A front view of a dust removal device of a digging anchor machine according to the utility model;

[0025] Figure 3 For Figure 2 A-A section of the utility model is partially cut away Figure 2 ;

[0026] Figure 4 A perspective view of a fixing mechanism in the dust removal device of the digging anchor machine according to the utility model;

[0027] Figure 5 For Figure 3 An enlarged view of B in the utility model;

[0028] Figure 6 A perspective view of a filter screen cleaning mechanism in the dust removal device of the digging anchor machine according to the utility model Figure 1 ;

[0029] Figure 7 A perspective view of a filter screen cleaning mechanism in the dust removal device of the digging anchor machine according to the utility model Figure 2 ;

[0030] Figure 8 A perspective view of an installation assembly in the dust removal device of the digging anchor machine according to the utility model Figure 1 ;

[0031] Figure 9 A perspective view of an installation assembly in the dust removal device of the digging anchor machine according to the utility model Figure 2 .

[0032] The reference numerals in the drawings represent respectively:

[0033] 1, air suction pipeline; 2, filter screen cleaning mechanism; 21, filter screen cleaning assembly; 211, rotating rod; 212, beating hammer; 213, cam; 214, motor; 215, torsional spring; 216, fixing shaft; 22, filter screen automatic replacement assembly; 221, air cylinder one; 222, air cylinder two; 223, follow-up shaft one; 224, follow-up shaft two; 225, filter screen fixing plate one; 226, filter screen fixing plate two; 227, notch one; 228, notch two; 3, dust removal mechanism; 31, spraying assembly; 311, atomizing nozzle; 312, first water outlet; 313, second water outlet; 32, fan; 33, upper baffle; 34, lower baffle; 35, air outlet; 4, fixing mechanism; 41, installation assembly; 411, clamping block placing groove; 412, protruding block placing groove; 413, installation plate; 42, fixing assembly; 421, protruding block; 422, clamping block placing groove two; 43, clamping block; 44, screw hole; 5, filter screen; 6, air suction cover. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0035] In the following description, "left", "right", "front", "rear", "upper", "lower" are oriented in the perspective of the front view.

[0036] Embodiment one: in some embodiments, referring to the drawings of the specification Figures 1-9 A dust removal device of a digging anchor machine, comprising a suction duct 1, a filter screen cleaning mechanism 2 for cleaning the filter screen 5 is installed on the suction duct 1, a dust removal mechanism 3 for dust removal of the suctioned dust is installed on the suction duct 1, a fixing mechanism 4 for fixing the suction duct 1 is installed on the suction duct 1, a suction hood 6 for suctioning dust is fixedly installed at the air inlet end of the suction duct 1, and the filter screen 5 is located at the rear side of the suction hood 6.

[0037] The filter screen cleaning mechanism 2 comprises two filter screen cleaning assemblies 21 and a filter screen automatic replacement assembly 22, the two filter screen cleaning assemblies 21 are symmetrically arranged on the upper and lower outer walls of the suction duct 1 and are used for quickly cleaning the filter screen 5 exposed outside the suction duct 1, the filter screen 5 is arranged inside the suction duct 1, and the upper and lower ends of the filter screen 5 respectively slide through and extend to the outside of the upper and lower sides of the suction duct 1 and are connected with the filter screen automatic replacement assembly 22, the filter screen automatic replacement assembly 22 is installed on the outer wall of the suction duct 1, and the filter screen automatic replacement assembly 22 is used for controlling different areas of the filter screen 5 to extend into the inside of the suction duct 1 to play a filtering effect.

[0038] In use, the operator installs the device on the mechanical arm of the digging anchor machine by the fixing mechanism 4, after starting the machine, the dust removal mechanism 3 is started, the suction duct 1 generates suction force, the dust is sucked into the suction duct 1 by the suction hood 6, the dust removal mechanism 3 removes the dust, the filter screen 5 filters large particles, and the air after dust removal is discharged through the air outlet 35; when the filter screen 5 needs to be cleaned, the filter screen automatic replacement assembly 22 is started to automatically replace the filter screen 5, when the filter screen 5 needs to be cleaned, the filter screen 5 is brought to above or below the filter screen cleaning assembly 21 on the corresponding side under the drive of the filter screen automatic replacement assembly 22, and then the filter screen cleaning assembly 21 on the corresponding side is started to clean the filter screen 5.

[0039] The utility model discloses can realize to the dust effectively dust removal of the anchor machine operation, and in the dust removal process need not stop machine full -automatic quick replacement to filter screen 5, do not influence normal down -hole operation, and can full -automatic cleaning to filter screen 5 after replacement, need not manual processing, reduce manpower input.

[0040] In the embodiment, the filter screen cleaning assembly 21 includes a rotating rod 211, a hammer 212, a cam 213, a motor 214, a torsional spring 215, and a fixed shaft 216. The upper and lower outer walls of the air suction pipeline 1 are both hingedly provided with the rotating rod 211. The rear end of the rotating rod 211 is fixedly connected with the hammer 212. The corner of the rotating rod 211 is rotatably provided with the fixed shaft 216. The torsional spring 215 is sleeved on the outside of the fixed shaft 216. One end of the torsional spring 215 is fixedly connected with the outer wall of the rotating rod 211, and the other end of the torsional spring 215 is fixedly connected with the outer wall of the fixed shaft 216. The hammer 212 cleans the filter screen 5 by hammering. The cam 213 is slidingly connected with the inner side of the rotating rod 211. Two motors 214 are respectively located on the upper and lower outer walls of the air suction pipeline 1 and are fixedly connected with the air suction pipeline 1. The cam 213 is fixedly connected with the driving end of the motor 214. Two fixed shafts 216 are respectively fixedly connected with the upper and lower outer walls of the air suction pipeline 1.

[0041] The filter screen automatic replacement assembly 22 includes a cylinder one 221, a cylinder two 222, a follower shaft one 223, a follower shaft two 224, a filter screen fixing plate one 225, a filter screen fixing plate two 226, a slot one 227, and a slot two 228. The cylinder one 221 is fixedly connected with the upper outer wall of the air suction pipeline 1. The driving end of the cylinder one 221 is fixedly connected with the filter screen fixing plate one 225. The cylinder two 222 is fixedly connected with the lower outer wall of the air suction pipeline 1. The driving end of the cylinder two 222 is fixedly connected with the filter screen fixing plate two 226. The two ends of the filter screen 5 extending to the outside of the air suction pipeline 1 are respectively fixedly connected with the filter screen fixing plate one 225 and the filter screen fixing plate two 226. The upper and lower sides of the air suction pipeline 1 are respectively provided with the slot one 227 and the slot two 228 through which the filter screen 5 slides. The slot one 227 and the slot two 228 are respectively rotatably provided with the follower shaft one 223 and the follower shaft two 224. The two ends of the filter screen 5 are respectively rollingly connected with the follower shaft one 223 and the follower shaft two 224. The bottom surface of the filter screen fixing plate one 225 and the top surface of the filter screen fixing plate two 226 are respectively slidingly connected with the upper and lower outer walls of the air suction pipeline 1. The filter screen fixing plate one 225 and the filter screen fixing plate two 226 are respectively located at the rear side of the two hammers 212.

[0042] In use, the initial state of the first cylinder 221 is in the retracted state, and the second cylinder 222 is in the extended state. When the operator needs to clean the filter screen 5, the driving end of the first cylinder 221 is extended to drive the filter screen fixing plate one 225 to slide forward, the driving end of the second cylinder 222 is retracted to drive the filter screen fixing plate two 226 to slide backward, the filter screen fixing plate one 225 and the filter screen fixing plate two 226 slide to drive the end of the filter screen 5 to pass through the slot one 227 and the slot two 228, and the filter screen 5 slides to drive the follow-up shaft one 223 and the follow-up shaft two 224 to rotate, at this time, the part of the filter screen 5 that needs to be cleaned is brought out to the lower side of the air suction duct 1, and the clean part of the filter screen 5 is brought into the air suction duct 1 to filter the air sucked in.

[0043] After the filter screen 5 is replaced, the filter screen cleaning assembly 21 on the side where the filter screen 5 that needs to be cleaned is started, the driving end of the motor 214 drives the cam 213 to rotate, the cam 213 drives the rotating rod 211 to rotate on the fixed shaft 216, the protruding part of the cam 213 extrudes the front end of the rotating rod 211 to drive the beating hammer 212 to lift, the cam 213 continues to rotate to the part with reduced protrusion, the rotating rod 211 is reset under the action of the torsional spring 215, the beating hammer 212 is driven by the rotating rod 211 to hammer the filter screen 5 to clean the filter screen 5, and the dust particles on the filter screen 5 are caused to fall down through continuous hammering.

[0044] The utility model can realize full-automatic quick replacement of the filter screen 5, does not affect normal downhole operation, and can automatically clean the filter screen 5 after replacement, without manual processing, and reduces the labor input.

[0045] In the embodiment, the dust removal mechanism 3 comprises a spraying assembly 31, a fan 32, an upper baffle 33, a lower baffle 34 and an air outlet 35, the spraying assembly 31 is arranged on the inner wall of the air suction duct 1, the fan 32 is arranged at the rear end of the air suction duct 1 and fixedly connected with the air suction duct 1, the top of the upper baffle 33 is fixedly connected with the inner top wall of the air suction duct 1, the bottom of the lower baffle 34 is fixedly connected with the inner bottom wall of the air suction duct 1, the air outlet 35 for discharging the dust-removed air is arranged at the top of the rear end of the air suction duct 1, the lower baffle 34 is located in front of the filter screen 5, the upper baffle 33 is located in front of the lower baffle 34, the fan 32 is located behind the filter screen 5, and the air outlet 35 is located behind the fan 32. The bottom of the upper baffle 33 has a gap with the inner bottom wall of the air suction duct 1, and the top of the lower baffle 34 has a gap with the inner top wall of the air suction duct 1, so that the dust can pass through.

[0046] The spraying assembly 31 comprises an atomizing nozzle 311, a first drainage port 312 and a second drainage port 313, the atomizing nozzle 311 is fixedly connected with the inner top wall of the air suction duct 1, the atomizing nozzle 311 is connected with a water pipe and a water pump, the atomizing nozzle 311 is located between the upper baffle 33 and the air suction hood 6, the first drainage port 312 is formed in the inner bottom wall of the air suction duct 1 and is located below the atomizing nozzle 311, and the second drainage port 313 is formed in the inner bottom wall of the air suction duct 1 and is located between the lower baffle 34 and the filter screen 5.

[0047] When the operator operates the fan 32 to start, the fan 32 sucks in dust through the air suction hood 6 and the air suction duct 1, the atomizing nozzle 311 sprays water mist to reduce dust after the dust is sucked into the air suction duct 1, the water produced by dust reduction is drained through the first drainage port 312, and the dust that cannot be reduced by dust reduction is completely filtered by the filter screen 5 after being blocked by the upper baffle 33 and the lower baffle 34, and the excess water is drained through the second drainage port 313, so that the dust can be reduced and filtered multiple times, and the dust reduction effect is improved.

[0048] In the embodiment, the fixing mechanism 4 comprises a mounting assembly 41, a fixing assembly 42 and a clamping block 43, the mounting assembly 41 is used to be connected with the mechanical arm of the anchor excavator, the fixing assembly 42 is installed at the top of the rear end of the air suction duct 1, and the mounting assembly 41 and the fixing assembly 42 are connected through the clamping block 43.

[0049] The mounting assembly 41 comprises a clamping block placing groove 411, a protruding block placing groove 412 and a mounting plate 413, the protruding block placing groove 412 is formed in the mounting plate 413, two clamping block placing grooves 411 for placing the clamping block 43 are symmetrically formed in the outer wall of the protruding block placing groove 412, and the mounting plate 413 is fixedly connected with the mechanical arm of the anchor excavator.

[0050] The fixing assembly 42 comprises a protruding block 421 and a clamping block placing groove two 422, the protruding block 421 is fixedly arranged on the left side of the air suction duct 1, two clamping block placing grooves two 422 are formed in the protruding block 421, the protruding block 421 is inserted and matched with the protruding block placing groove 412, and the clamping block 43 and the upper side of the mounting plate 413 are both provided with screw holes 44 for fixing screws.

[0051] In use, the operator slides the protruding block 421 into the protruding block placing groove 412 until the clamping block placing groove 411 and the clamping block placing groove two 422 are communicated, then the clamping block 43 is clamped into the clamping block placing groove two 422 after passing through the clamping block placing groove 411, one end of the clamping block 43 is located in the clamping block placing groove 411 and the other end is located in the clamping block placing groove two 422, then the screws are screwed into the screw holes 44 in the mounting plate 413 and then are screwed into the screw holes 44 in the clamping block 43, so as to fix the clamping block 43 and the mounting plate 413, thereby the dust removal device can be conveniently disassembled, and the normal operation of the anchor excavator is prevented from being affected by the dust removal device.

[0052] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A dust removal device for a roof bolter, comprising an air suction duct (1), characterized in that: The filter screen cleaning mechanism (2) is installed on the air suction pipeline (1) and used for cleaning the filter screen (5). The filter screen cleaning mechanism (2) comprises two filter screen cleaning assemblies (21) and a filter screen automatic replacement assembly (22). The two filter screen cleaning assemblies (21) are symmetrically arranged on the upper and lower outer walls of the air suction pipeline (1) and used for quickly cleaning the filter screen (5) exposed outside the air suction pipeline (1). The filter screen (5) is arranged inside the air suction pipeline (1), and the upper and lower ends of the filter screen (5) are respectively slid through and extended to the outside of the upper and lower sides of the air suction pipeline (1) and connected with the filter screen automatic replacement assembly (22). The filter screen automatic replacement assembly (22) is installed on the outer wall of the air suction pipeline (1) and used for controlling different areas of the filter screen (5) to extend into the air suction pipeline (1) to play a filtering effect. The dust removal mechanism (3) is installed on the air suction pipeline (1) and used for reducing dust suction. The fixing mechanism (4) is installed on the air suction pipeline (1) and used for fixing the air suction pipeline (1). The air suction cover (6) for suctioning dust is fixedly installed at the air inlet end of the air suction pipeline (1), and the filter screen (5) is located at the rear side of the air suction cover (6).

2. The dust extraction device of a bolter according to claim 1, characterized in that, The filter screen cleaning assembly (21) comprises a rotating rod (211), a hammer (212), a cam (213), a motor (214), a torsional spring (215) and a fixed shaft (216). The upper and lower outer walls of the air suction pipeline (1) are both hingedly provided with the rotating rod (211). The rear end of the rotating rod (211) is fixedly connected with the hammer (212). The corner of the rotating rod (211) is rotatably provided with the fixed shaft (216). One end of the torsional spring (215) is fixedly connected with the outer wall of the rotating rod (211), and the other end of the torsional spring (215) is fixedly connected with the outer wall of the fixed shaft (216). The hammer (212) is used for cleaning the filter screen (5) by hammering. The cam (213) is slidably connected with the inner side of the rotating rod (211). Two motors (214) are respectively arranged on the upper and lower outer walls of the air suction pipeline (1) and fixedly connected with the air suction pipeline (1). The cam (213) is fixedly connected with the driving end of the motor (214). Two fixed shafts (216) are respectively fixedly connected with the upper and lower outer walls of the air suction pipeline (1).

3. A dust extraction device for a bolter as claimed in claim 2, characterised in that, The filter screen automatic replacement assembly (22) comprises a cylinder I (221), a cylinder II (222), a follow-up shaft I (223), a follow-up shaft II (224), a filter screen fixing plate I (225), a filter screen fixing plate II (226), a slot I (227) and a slot II (228), the cylinder I (221) is fixedly connected with the upper outer wall of the air suction pipeline (1), the driving end of the cylinder I (221) is fixedly connected with the filter screen fixing plate I (225), the cylinder II (222) is fixedly connected with the lower outer wall of the air suction pipeline (1), the driving end of the cylinder II (222) is fixedly connected with the filter screen fixing plate II (226), the two ends of the filter screen (5) extending to the outside of the air suction pipeline (1) are fixedly connected with the filter screen fixing plate I (225) and the filter screen fixing plate II (226) respectively, the slot I (227) and the slot II (228) are formed in the upper and lower sides of the air suction pipeline (1) respectively, the follow-up shaft I (223) and the follow-up shaft II (224) are rotatably arranged in the slot I (227) and the slot II (228) respectively, the two ends of the filter screen (5) are rollingly connected with the follow-up shaft I (223) and the follow-up shaft II (224) respectively, the bottom surface of the filter screen fixing plate I (225) and the top surface of the filter screen fixing plate II (226) are slidably connected with the upper and lower outer walls of the air suction pipeline (1) respectively.

4. A dust extraction device for a bolter as claimed in claim 3, characterised in that, The dust removal mechanism (3) comprises a spraying assembly (31), a fan (32), an upper baffle (33), a lower baffle (34) and an air outlet (35), the spraying assembly (31) is arranged on the inner wall of the air suction pipeline (1), the fan (32) is arranged at the rear end of the air suction pipeline (1) and fixedly connected with the air suction pipeline (1), the top of the upper baffle (33) is fixedly connected with the inner top wall of the air suction pipeline (1), the bottom of the lower baffle (34) is fixedly connected with the inner bottom wall of the air suction pipeline (1), the air outlet (35) for discharging the air after dust removal is formed in the top of the rear end of the air suction pipeline (1), the lower baffle (34) is located in front of the filter screen (5), the upper baffle (33) is located in front of the lower baffle (34), the fan (32) is located behind the filter screen (5), and the air outlet (35) is located behind the fan (32).

5. A dust extraction device for a bolter as claimed in claim 4, characterised in that, The spraying assembly (31) comprises an atomizing nozzle (311), a first drain (312) and a second drain (313), the atomizing nozzle (311) is fixedly connected with the inner top wall of the air suction pipeline (1), the atomizing nozzle (311) is connected with a water pipe and a water pump, the atomizing nozzle (311) is located between the upper baffle (33) and the air suction cover (6), the first drain (312) is formed in the inner bottom wall of the air suction pipeline (1) and located below the atomizing nozzle (311), and the second drain (313) is formed in the inner bottom wall of the air suction pipeline (1) and located between the lower baffle (34) and the filter screen (5).

6. A dust extraction device for a bolter as claimed in claim 5, characterised in that, The fixing mechanism (4) comprises a mounting assembly (41), a fixing assembly (42) and a clamping block (43), the mounting assembly (41) is used for being connected with the mechanical arm of the anchor machine, the fixing assembly (42) is installed at the top of the rear end of the air suction pipeline (1), and the mounting assembly (41) and the fixing assembly (42) are connected through the clamping block (43).

7. A dust extraction device for a bolter as claimed in claim 6, characterised in that, The mounting assembly (41) comprises a clamping block placing groove (411), a protruding block placing groove (412) and a mounting plate (413), the protruding block placing groove (412) is formed in the mounting plate (413), two clamping block placing grooves (411) are symmetrically formed in the outer wall of the protruding block placing groove (412), and the mounting plate (413) is used for being fixedly connected with the mechanical arm of the anchor machine.

8. A dust extraction device for a bolter as claimed in claim 7, characterised in that, The fixing assembly (42) comprises a protruding block (421) and a clamping block placing groove two (422), the protruding block (421) is fixedly arranged on the left side of the air suction pipeline (1), two clamping block placing grooves two (422) are formed in the protruding block (421), the protruding block (421) is insertedly connected with the protruding block placing groove (412), and screw holes (44) for screw fixing are formed in the clamping block (43) and the upper side of the mounting plate (413).

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