Special double-fan dust removal system for down-the-hole drill

Abstract

The special double-fan dust removal system for the down-the-hole drill comprises a main body mechanism, the top of the main body mechanism is provided with two exhaust mechanisms which are arranged side by side and used for exhausting gas, and an inner cavity of the main body mechanism is provided with two sets of dust collection filter elements which are arranged side by side and used for filtering dust-contained gas in the main body mechanism; each exhaust mechanism and each group of dust collection filter elements are arranged in a one-to-one correspondence manner; the two exhaust mechanisms and the two sets of dust collection filter elements are used in cooperation, high suction force can be provided during dust removal, the dust removal effect is better, the device is suitable for various working conditions, the exhaust amount is large, the dust removal efficiency can be improved, and then the dust collection effect of the whole drilling machine dust collection system can be improved; the bag opening of the dust collecting bag can be opened and fixed through the cooperative use of the dust discharging mechanism and the bag fixing mechanism, the dust collecting bag can be fixed without adopting a threaded stainless steel ribbon, the fixing steps of the dust collecting bag are reduced, manpower is saved, and therefore the disassembly and assembly efficiency of the dust collecting bag can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal for down-the-hole drills, and in particular to a double-fan dust removal system dedicated to down-the-hole drills. Background Art

[0002] As the core component of the dust collection system of the drilling rig, the quality of the dust collector determines the dust collection effect of the entire system. In recent years, with the continuous development of domestic blasting technology, mines have higher requirements for the drilling speed and drilling aperture of the drilling rig.

[0003] The utility model patent document with the announcement number CN204476317U discloses a rock drilling rig dust collector, which includes a housing, a filter element is arranged in the housing, a centrifugal fan is arranged above the housing, an air inlet is arranged on the housing, a baffle is arranged inside the air inlet, a filter settling chamber is arranged in the housing below the filter element, and the lower end of the filter settling chamber is connected to the dust outlet; a pulse recoil controller is arranged outside the housing, one end of the pulse recoil controller is connected to the high-pressure gas inlet, and the other end is connected to the recoil gas outlet arranged above the filter element, and the recoil gas outlet is connected to the central passage of the filter element. It can improve the static pressure and air intake of the entire dust collection system, improve the quality of the power components of the entire dust collector, and facilitate maintenance.

[0004] The above-mentioned rock drilling rig dust collector can solve the corresponding technical problems. It adopts a single fan structure, which is limited by the power of a single fan, has a small suction force, and the amount of air purified per unit time is limited, resulting in poor dust collection effect. In addition, it usually adopts a threaded stainless steel cable tie to fix the dust bag on the dust exhaust port. During the fixing process, one person is required to hold the dust bag and the other person manually adjusts the threaded stainless steel cable tie. Not only is the operation more cumbersome, but it also requires more manpower and is inconvenient to use. For this reason, a dual-fan dust removal system dedicated to down-the-hole drilling rigs is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-fan dust removal system dedicated to down-the-hole drilling rigs to solve the technical problems that the single fan structure proposed above has a limited amount of air purified per unit time, resulting in poor dust collection effect and complicated operation.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dual-fan dust removal system specially used for down-the-hole drilling rigs comprises a dual-fan dust removal system body for dust removal of down-the-hole drilling rigs, the dual-fan dust removal system body comprising a main body mechanism, a top of which is provided with two exhaust mechanisms which are arranged in parallel and are used for exhausting gas, an inner cavity of the main body mechanism is provided with two groups of dust collecting filter elements which are arranged in parallel and are used for filtering the dust-containing gas in the main body mechanism, each exhaust mechanism is arranged in a one-to-one correspondence with each group of dust collecting filter elements, a dust cleaning mechanism for cleaning the dust collecting filter elements is provided on the main body mechanism, two dust exhaust mechanisms which are arranged in parallel and are used for dust exhaust are provided at the bottom of the main body mechanism, each dust exhaust mechanism is arranged in a one-to-one correspondence with each group of dust collecting filter elements, and a bag fixing mechanism for fixing the dust collecting bag is provided between the two dust exhaust mechanisms.

[0008] As a further scheme of the present invention, the main body mechanism includes a box body with an open top and bottom, the exhaust mechanism and the dust exhaust mechanism are respectively arranged at the top and bottom of the air inlet pipe, the air inlet pipe is installed at the upper part of one side of the box body, the bottom of the box body is connected to two dust collecting hoppers arranged in parallel, the bottom area of ​​the dust collecting hopper is smaller than the top area, and a bracket is installed on the upper part of the inner cavity of the box body, and the dust collecting filter element is arranged at the bottom of the bracket.

[0009] Among them, two symmetrically arranged inspection ports are opened on the front side of the box body, each inspection port is arranged in a one-to-one correspondence with each group of dust collecting filters, and an inspection door that can seal the inspection port is hinged on the box body.

[0010] Each group of dust collecting filter elements is distributed in a rectangular array with a plurality of dust collecting filter elements. The top ends of the dust collecting filter elements are screwed and installed on the bottom of the bracket.

[0011] As a further solution of the present invention, a buffer shell is installed on one side of the inner cavity of the box body, the buffer shell is located on one side of the dust collecting filter element, the air inlet of the buffer shell is connected to the air inlet pipe, and the air outlet of the buffer shell faces downward.

[0012] As a further solution of the present invention, the exhaust mechanism includes a casing installed on the top of the box body, the air inlet of the casing is connected to the inner cavity of the box body, the inner cavity of the casing is rotatably connected to an impeller, a cover plate is installed on the top of the casing, a motor is installed on the top of the cover plate, the bottom of the motor penetrates into the inner cavity of the casing and is fixedly connected to the impeller, and a gas filtration channel is formed between the air inlet pipe, the buffer shell, the box body and the casing.

[0013] As a further solution of the present invention, a filter cover is installed on the surface of the casing, and the filter cover is arranged on the air outlet of the casing.

[0014] As a preferred embodiment of the present invention, the dust cleaning mechanism includes a back-blowing air tank installed on one side of the box body, the back-blowing air tank and the air inlet pipe are arranged opposite to each other, and a plurality of equidistantly distributed conduits are connected to the back-blowing air tank, and one end of the conduit away from the back-blowing air tank is sealed and penetrates into the inner cavity of the box body, and the conduit is fixedly connected to the top of the bracket, and a plurality of equidistantly distributed blowing holes are opened at the bottom of the conduit, and the blowing holes are located at the top of the dust collecting filter element, and a safety valve and a pulse valve are installed on the conduit in sequence along the flow direction of the high-pressure gas.

[0015] As a preferred embodiment of the present invention, the dust exhaust mechanism includes a dust exhaust pipe installed at the bottom end of the dust collecting hopper, the bottom end of the dust exhaust pipe is connected to a pipe cover, the inner cavity of the pipe cover is provided with a discharge nozzle, an inner ring is fixedly connected between the discharge nozzle and the pipe cover, and a dust flow channel is formed between the dust collecting hopper, the dust exhaust pipe, the pipe cover, the inner ring and the discharge nozzle.

[0016] As a further preferred embodiment of the present invention, the bag fixing mechanism includes a bag supporting assembly arranged on the surface of the discharge nozzle, and a receiving cavity for placing the bag supporting assembly is formed between the inner ring and the tube cover. The bottom of the box body is provided with a lifting assembly for driving the two bag supporting assemblies to move up and down synchronously.

[0017] Among them, the bag supporting assembly includes an upper supporting ring and a lower supporting ring which are arranged vertically, and the upper supporting ring and the lower supporting ring are movably sleeved on the surface of the discharge nozzle. A gap is formed between the upper supporting ring and the discharge nozzle, and between the lower supporting ring and the discharge nozzle for the dust bag to pass through. A plurality of connecting rods equidistantly distributed in a ring are fixedly connected between the upper supporting ring and the lower supporting ring. A rubber sleeve is sleeved on the surface of the upper supporting ring, and a through hole is formed at the bottom of the rubber sleeve for the connecting rod to pass through.

[0018] As a further preferred embodiment of the present invention, the lifting assembly includes a connecting plate fixedly connected between two lower supporting rings, an electric telescopic rod is installed at the bottom of the box, and an output end of the electric telescopic rod is fixedly connected to the top of the connecting plate.

[0019] As a further preferred embodiment of the present invention, the top diameter of the inner ring is larger than its bottom diameter, the inner wall of the tube cover is fixedly connected with an outer ring, the top diameter of the outer ring is smaller than its bottom diameter, and a receiving cavity with an isosceles trapezoidal cross-section is formed between the inner ring and the outer ring.

[0020] Compared with the prior art, the double-fan dust removal system for down-the-hole drilling rigs of the present invention has the following beneficial effects:

[0021] 1. The two exhaust mechanisms and two sets of dust collection filters can provide strong suction during dust removal, which has better dust removal effect and is suitable for various working conditions. The large exhaust volume helps to improve the dust removal efficiency, and thus helps to improve the dust collection effect of the entire drilling rig dust collection system.

[0022] 2. Through the coordinated use of the dust exhaust mechanism and the bag fixing mechanism, the bag opening of the dust bag can be opened and fixed, and there is no need to use a threaded stainless steel cable tie to fix the dust bag. This not only reduces the steps for fixing the dust bag, but also saves manpower, thereby helping to improve the efficiency of disassembly and assembly of the dust bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional schematic diagram of the structure of an embodiment of the present invention Figure 1 ;

[0025] Figure 2 A three-dimensional schematic diagram of the structure of an embodiment of the present invention Figure 2 ;

[0026] Figure 3 It is a schematic diagram of the explosion structure of an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a local structure of an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the main structure of an embodiment of the present invention;

[0029] Figure 6 It is a schematic cross-sectional structural diagram of the pipe cover and the discharge nozzle in an embodiment of the present invention;

[0030] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 8 It is a schematic diagram of the exploded structure of the bag support assembly in an embodiment of the present invention.

[0032] Reference numerals: 100, main body; 110, box body; 111, inspection door; 120, air inlet pipe; 130, dust hopper; 140, bracket;

[0033] 200, exhaust mechanism; 210, housing; 220, impeller; 230, cover plate; 240, motor; 250, filter cover;

[0034] 300, dust collection filter;

[0035] 400, dust cleaning mechanism; 410, back-blowing gas tank; 420, conduit;

[0036] 500, dust exhaust mechanism; 510, dust exhaust pipe; 520, pipe cover; 521, outer sleeve ring; 530, discharge nozzle; 531, inner sleeve ring;

[0037] 600, bag fixing mechanism; 610, bag supporting assembly; 611, upper supporting ring; 612, lower supporting ring; 613, connecting rod; 614, rubber sleeve; 620, connecting plate; 630, electric telescopic rod;

[0038] 700. Buffer shell. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0042] Embodiment 1:

[0043] See also Figure 1-Figure 8As shown, embodiment 1 of the present invention is a dual-fan dust removal system dedicated to a down-the-hole drill, comprising a dual-fan dust removal system body for dust removal of a down-the-hole drill, comprising a main body 100, on the top of which are provided with two exhaust mechanisms 200 which are arranged in parallel and used for exhausting gas, the inner cavity of the main body 100 is provided with two groups of dust collecting filter elements 300 which are arranged in parallel and used for filtering the dust-containing gas in the main body 100, each exhaust mechanism 200 is arranged in a one-to-one correspondence with each group of dust collecting filter elements 300, the main body 100 is provided with a dust cleaning mechanism 400 for cleaning the dust collecting filter elements 300, and the bottom of the main body 100 is provided with two dust exhaust mechanisms 500 which are arranged in parallel and used for dust exhaust, each dust exhaust mechanism 500 is arranged in a one-to-one correspondence with each group of dust collecting filter elements 300, and a bag fixing mechanism 600 for fixing a dust bag is commonly provided between the two dust exhaust mechanisms 500.

[0044] Embodiment 2: The difference from embodiment 1 is:

[0045] The main mechanism 100 includes a box body 110 with an open top and bottom, an exhaust mechanism 200 and a dust exhaust mechanism 500 are respectively arranged at the top and bottom of an air inlet pipe 120, and the upper part of one side of the box body 110 is detachably mounted with an air inlet pipe 120 by means of screws, and the bottom of the box body 110 is connected to two dust collecting hoppers 130 arranged in parallel, and the bottom surface area of ​​the dust collecting hopper 130 is smaller than the top surface area thereof, which can improve the dust discharge efficiency and avoid dust residue, and a bracket 140 is horizontally mounted at the upper part of the inner cavity of the box body 110, and a dust collecting filter element 300 is arranged at the bottom of the bracket 140.

[0046] The front side of the box 110 is provided with two symmetrical inspection ports, each of which corresponds to each set of dust filter cartridges 300. The box 110 is hinged with an inspection door 111 that can seal the inspection port, so that the inspection door 111 can be opened later to disassemble and replace the dust filter cartridges 300 through the inspection port.

[0047] Each group of dust collecting filters 300 is distributed in a rectangular array, and the top of the dust collecting filter 300 is screwed and installed on the bottom of the bracket 140. The dust collecting filter 300 is threadedly connected to the bracket 140 to facilitate subsequent disassembly and replacement of the dust collecting filter 300.

[0048] A buffer shell 700 is installed on one side of the inner cavity of the box body 110. The buffer shell 700 is located on one side of the dust filter element 300. The air inlet of the buffer shell 700 is connected to the air inlet pipe 120, and the air outlet of the buffer shell 700 faces downward. The buffer shell 700 can disturb the dust-containing gas entering the box body 110, so that the gas flow rate is reduced, so that the dust-containing gas can be filtered through the dust filter element 300 at a low speed. At the same time, large particles of stone missed in the primary filtration can collide with the inner wall of the buffer shell 700 and fall into the dust hopper 130.

[0049] The exhaust mechanism 200 includes a casing 210 installed on the top of the housing 110, the air inlet of the casing 210 is connected to the inner cavity of the housing 110, the inner cavity of the casing 210 is rotatably connected to an impeller 220, a cover plate 230 is installed on the top of the casing 210, and a motor 240 is installed on the top of the cover plate 230. The motor 240 adopts a dual high-speed plunger motor, and the speed of the motor 240 reaches 5500rpm. The bottom of the motor 240 penetrates into the inner cavity of the casing 210 and is fixedly connected to the impeller 220. A gas filtering channel is formed between the air inlet pipe 120, the buffer shell 700, the housing 110 and the casing 210. By starting the motor 240, the output shaft of the motor 240 can drive the impeller 220 to rotate to achieve the exhaust effect.

[0050] A filter cover 250 is detachably mounted on the surface of the casing 210 by screws. The filter cover 250 is disposed on the air outlet of the casing 210. The filter cover 250 can prevent impurities in the outside air from entering the inner cavity of the casing 210 through the air outlet of the casing 210, and can also improve the safety of the impeller 220 during operation.

[0051] The dust cleaning mechanism 400 includes a back-blowing air tank 410 installed on one side of the box body 110. The back-blowing air tank 410 is arranged opposite to the air inlet pipe 120. The back-blowing air tank 410 is connected to a plurality of equidistantly distributed conduits 420. One end of the conduit 420 away from the back-blowing air tank 410 is sealed and penetrates into the inner cavity of the box body 110. The conduit 420 is fixedly connected to the top of the bracket 140. A plurality of equidistantly distributed blowing holes are opened at the bottom of the conduit 420. The blowing holes are located at the top of the dust collecting filter element 300. A safety valve and a pulse valve are sequentially installed on the conduit 420 along the flow direction of the high-pressure gas. By opening the safety valve and the pulse valve, the high-pressure gas in the back-blowing air tank 410 forms a rapid airflow, which is blown toward the dust collecting filter element 300 through the conduit 420 and the blowing holes. The gas volume inside the dust collecting filter element 300 expands rapidly, so that the dust adsorbed on the dust collecting filter paper can be cleaned.

[0052] The dust exhaust mechanism 500 includes a dust exhaust pipe 510 installed at the bottom end of the dust hopper 130, the bottom end of the dust exhaust pipe 510 is connected to a pipe cover 520, the inner cavity of the pipe cover 520 is provided with a discharge nozzle 530, and an inner ring 531 is fixedly connected between the discharge nozzle 530 and the pipe cover 520. A dust flow channel is formed between the dust hopper 130, the dust exhaust pipe 510, the pipe cover 520, the inner ring 531 and the discharge nozzle 530. The dust bag is fixed on the surface of the discharge nozzle 530, so that the dust collected in the dust hopper 130 can be discharged into the dust bag through the dust exhaust pipe 510, the pipe cover 520 and the discharge nozzle 530 for unified collection.

[0053] The bag fixing mechanism 600 includes a bag supporting assembly 610 disposed on the surface of the discharge nozzle 530, and a receiving cavity for placing the bag supporting assembly 610 is formed between the inner ring 531 and the tube cover 520. A lifting assembly for driving the two bag supporting assemblies 610 to move up and down synchronously is provided at the bottom of the box body 110.

[0054] The bag support assembly 610 includes an upper support ring 611 and a lower support ring 612 which are arranged in an upper and lower manner. The upper support ring 611 and the lower support ring 612 are both movably sleeved on the surface of the discharge nozzle 530. A gap is formed between the upper support ring 611 and the discharge nozzle 530, and between the lower support ring 612 and the discharge nozzle 530 for the dust bag to pass through. A plurality of connecting rods 613 which are equidistantly distributed in an annular shape are fixedly connected between the upper support ring 611 and the lower support ring 612. By sleeveing ​​the dust bag on the surface of the discharge nozzle 530 and flipping the bag mouth over, the dust bag can be easily removed. It is arranged on the bag support assembly 610 to complete the operation of supporting the bag opening of the dust bag. The surface of the upper supporting ring 611 is sleeved with a rubber sleeve 614, and the bottom of the rubber sleeve 614 is provided with a through hole for the connecting rod 613 to pass through. The rubber sleeve 614 can increase the friction between the upper supporting ring 611 and the bag opening of the dust bag to play an anti-slip role. At the same time, it can play a buffering role on the upper supporting ring 611 to reduce the impact force of the upper supporting ring 611 on the tube cover 520, which helps to increase the service life of the tube cover 520.

[0055] The lifting assembly includes a connecting plate 620 fixedly connected between two lower supporting rings 612 and arranged horizontally. An electric telescopic rod 630 is vertically installed at the bottom of the box body 110. The output end of the electric telescopic rod 630 is fixedly connected to the top of the connecting plate 620. By starting the electric telescopic rod 630, the output end of the electric telescopic rod 630 can drive the connecting plate 620 and the bag support assembly 610 to move up and down, and then the distance between the bag support assembly 610 and the pipe cover 520 can be adjusted to facilitate the fixing and removal of the dust bag.

[0056] The top diameter of the inner ring 531 is larger than the bottom diameter, the inner wall of the tube cover 520 is fixedly connected with the outer ring 521, the top diameter of the outer ring 521 is smaller than the bottom diameter, and a receiving cavity with an isosceles trapezoidal cross-section is formed between the inner ring 531 and the outer ring 521. The receiving cavity, which is narrow at the top and wide at the bottom, is convenient for the insertion of the bag support assembly 610 and the bag opening of the dust bag, and can be suitable for dust bags of different thicknesses.

[0057] The working principle of the embodiment of the present invention is as follows:

[0058] S1, bag fixing operation: start the electric telescopic rod 630, so that the output end of the electric telescopic rod 630 drives the connecting plate 620 and the bag support assembly 610 to move downward to the maximum, so that the bag support assembly 610 is separated from the accommodating chamber, and at this time, the dust collecting bag is sleeved on the surface of the discharge nozzle 530 from bottom to top, so that the bag opening passes through the gap; then the bag opening is folded downward, so that the bag opening is sleeved on the surface of the bag support assembly 610, and the rubber sleeve 614 contacts the outer surface of the bag opening, and the rubber sleeve 614 plays an anti-slip role, and the fixing is completed. The opening of the dust bag is opened, and another dust bag can be placed on the other discharge nozzle 530 and the bag-holding assembly 610; the electric telescopic rod 630 is started again, so that the output end of the electric telescopic rod 630 drives the connecting plate 620 and the bag-holding assembly 610 to move upward, and the bag-holding assembly 610 drives the dust bag to move upward synchronously, so that the bag opening is gradually placed in the accommodating cavity until it is maximized, so that the inner ring 531 and the outer ring 521 are respectively in contact with the inner wall surface of the bag opening, and the dust bag opening can be fixed.

[0059] S2. Dust collection operation: start the motor 240, and the output shaft of the motor 240 drives the impeller 220 to rotate. The dust-containing gas enters the inner cavity of the buffer shell 700 from the air inlet pipe 120, so that the gas flow rate decreases. The large particles of stone missed in the primary filtration collide with the inner wall of the buffer shell 700 and fall into the dust hopper 130, and are guided to the dust collecting bag through the dust exhaust pipe 510, the pipe cover 520, the inner sleeve ring 531 and the discharge nozzle 530 for unified collection. The dust-containing gas is filtered through the dust collecting filter element 300 at a low speed, so that the dust concentration of the filtered gas meets the emission standards. Finally, the filtered gas is discharged through the air outlet of the casing 210 under the action of the impeller 220.

[0060] S3. Dust cleaning operation: Open the safety valve and the pulse valve to form a rapid airflow in the back-blowing gas tank 410, which is blown toward the dust filter element 300 through the conduit 420 and the blowing hole. The gas volume inside the dust filter element 300 expands rapidly, and the dust adsorbed on the dust filter paper can be cleaned up, so that the dust on the dust filter element 300 falls into the dust hopper 130, and is guided to the dust bag through the dust exhaust pipe 510, the pipe cover 520, the inner sleeve ring 531 and the discharge nozzle 530 for unified collection.

[0061] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. Double fan dust removal system for down-the-hole drilling rig, characterized by: It includes a dual-fan dust removal system body for dust removal of down-the-hole drilling rigs; The main body of the dual-fan dust removal system comprises a main body (100), the top of which is provided with two exhaust mechanisms (200) arranged in parallel and used for exhausting gas, the inner cavity of the main body (100) is provided with two groups of dust collecting filter elements (300) arranged in parallel and used for filtering dust-containing gas in the main body (100), each of the exhaust mechanisms (200) is arranged in a one-to-one correspondence with each group of dust collecting filter elements (300), the main body (100) is provided with a dust cleaning mechanism (400) for cleaning the dust collecting filter elements (300), and the bottom of the main body (100) is provided with two dust exhaust mechanisms (500) arranged in parallel and used for exhausting dust, each of the dust exhaust mechanisms (500) is arranged in a one-to-one correspondence with each group of dust collecting filter elements (300), and a bag fixing mechanism (600) for fixing a dust collecting bag is commonly provided between the two dust exhaust mechanisms (500).

2. The double-fan dust removal system for down-the-hole drilling rig according to claim 1 is characterized in that: The main body mechanism (100) comprises a box body (110) with an open top and a bottom. The exhaust mechanism (200) and the dust exhaust mechanism (500) are respectively arranged at the top and the bottom of the air intake pipe (120). The air intake pipe (120) is installed at the upper part of one side of the box body (110). The bottom of the box body (110) is connected to two dust collecting hoppers (130) arranged in parallel. The bottom surface area of ​​the dust collecting hopper (130) is smaller than the top surface area. A bracket (140) is installed on the upper part of the inner cavity of the box body (110), and the dust collecting filter element (300) is arranged at the bottom of the bracket (140); The front side of the box body (110) is provided with two symmetrically arranged inspection ports, each of the inspection ports being arranged in a one-to-one correspondence with each group of dust collecting filter elements (300), and the box body (110) is hingedly provided with an inspection door (111) capable of sealing the inspection ports; Each group of dust collecting filter elements (300) has a plurality of dust collecting filter elements (300) distributed in a rectangular array, and the top ends of the dust collecting filter elements (300) are threadedly screwed onto the bottom of the bracket (140).

3. The double-fan dust removal system for down-the-hole drilling rig according to claim 2 is characterized in that: A buffer shell (700) is installed on one side of the inner cavity of the box body (110), the buffer shell (700) is located on one side of the dust collecting filter element (300), the air inlet of the buffer shell (700) is connected to the air inlet pipe (120), and the air outlet of the buffer shell (700) faces downward.

4. The double-fan dust removal system for down-the-hole drilling rig according to claim 3 is characterized by: The exhaust mechanism (200) comprises a casing (210) mounted on the top of a housing (110); an air inlet of the casing (210) is in communication with an inner cavity of the housing (110); an impeller (220) is rotatably connected to the inner cavity of the casing (210); a cover plate (230) is mounted on the top of the casing (210); a motor (240) is mounted on the top of the cover plate (230); a bottom of the motor (240) penetrates the inner cavity of the casing (210) and is fixedly connected to the impeller (220); and a gas filtering channel is formed between the air inlet pipe (120), the buffer shell (700), the housing (110) and the casing (210).

5. The double-fan dust removal system for down-the-hole drilling rig according to claim 4 is characterized in that: A filter cover (250) is installed on the surface of the casing (210), and the filter cover (250) is arranged to cover the air outlet of the casing (210).

6. The double-fan dust removal system for down-the-hole drilling rig according to claim 2 is characterized by: The dust cleaning mechanism (400) comprises a back-blowing air tank (410) installed on one side of the box body (110), the back-blowing air tank (410) being arranged opposite to the air inlet pipe (120), the back-blowing air tank (410) being connected to a plurality of equidistantly distributed conduits (420), one end of the conduit (420) away from the back-blowing air tank (410) being sealed and extending through the inner cavity of the box body (110), the conduit (420) being fixedly connected to the top of the bracket (140), a plurality of equidistantly distributed blowing holes being provided at the bottom of the conduit (420), the blowing holes being located at the top of the dust collecting filter element (300), and a safety valve and a pulse valve being installed in sequence on the conduit (420) along the flow direction of the high-pressure gas.

7. The double-fan dust removal system for down-the-hole drilling rig according to claim 2 is characterized by: The dust exhaust mechanism (500) comprises a dust exhaust pipe (510) installed at the bottom end of the dust collecting hopper (130); the bottom end of the dust exhaust pipe (510) is connected to a pipe cover (520); the inner cavity of the pipe cover (520) is provided with a discharge nozzle (530); an inner sleeve ring (531) is fixedly connected between the discharge nozzle (530) and the pipe cover (520); and a dust circulation channel is formed between the dust collecting hopper (130), the dust exhaust pipe (510), the pipe cover (520), the inner sleeve ring (531) and the discharge nozzle (530).

8. The double-fan dust removal system for down-the-hole drilling rig according to claim 7 is characterized in that: The bag-fixing mechanism (600) comprises a bag-supporting assembly (610) arranged on the surface of the discharge nozzle (530); a receiving cavity for placing the bag-supporting assembly (610) is formed between the inner sleeve ring (531) and the tube cover (520); and a lifting assembly for driving the two bag-supporting assemblies (610) to move up and down synchronously is provided at the bottom of the box body (110); The bag support assembly (610) comprises an upper supporting ring (611) and a lower supporting ring (612) which are arranged in an upper and lower manner; the upper supporting ring (611) and the lower supporting ring (612) are both movably sleeved on the surface of the discharge nozzle (530); a gap for the dust bag to pass through is formed between the upper supporting ring (611) and the discharge nozzle (530), and between the lower supporting ring (612) and the discharge nozzle (530); a plurality of connecting rods (613) equidistantly distributed in an annular shape are fixedly connected between the upper supporting ring (611) and the lower supporting ring (612); a rubber sleeve (614) is sleeved on the surface of the upper supporting ring (611); and a through hole for the connecting rods (613) to pass through is formed at the bottom of the rubber sleeve (614).

9. The double-fan dust removal system for down-the-hole drilling rig according to claim 8 is characterized in that: The lifting assembly comprises a connecting plate (620) fixedly connected between two lower supporting rings (612); an electric telescopic rod (630) is installed at the bottom of the box body (110); and an output end of the electric telescopic rod (630) is fixedly connected to the top of the connecting plate (620).

10. The double-fan dust removal system for down-the-hole drilling rig according to claim 8, characterized in that: The top diameter of the inner sleeve ring (531) is larger than the bottom diameter thereof; the inner wall surface of the tube cover (520) is fixedly connected to the outer sleeve ring (521); the top diameter of the outer sleeve ring (521) is smaller than the bottom diameter thereof; and an accommodating cavity having an isosceles trapezoidal cross section is formed between the inner sleeve ring (531) and the outer sleeve ring (521).

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