Movable dust removal and gas overrun prevention device for dry drilling construction

Abstract

The utility model discloses a movable dry type drilling construction dust removal gas overrun prevention device which comprises a dust removal mechanism, the dust removal mechanism comprises a primary dust removal assembly and a secondary dust removal assembly, the primary dust removal assembly is communicated with the secondary dust removal assembly, a moving assembly is arranged at the bottom end of the dust removal mechanism, and the dust removal mechanism moves through the moving assembly. A power assembly is arranged at the upper end of the moving assembly, is connected with the moving assembly and the dust removal mechanism and provides a power source for the moving assembly and the dust removal mechanism. The device is compact in structure, high in flexibility and maneuverability and capable of moving along with the dry type drilling construction position, after coal-dust-containing gas generated in drilling passes through the two-stage dust removal assembly, clean gas enters an extraction system in an underground coal mine, the condition that gas exceeds the limit is effectively prevented, and the working efficiency is improved. The device is of great significance to efficient dust removal and dust fall in underground coal mine operation, eradication of gas overrun, change of field operation environment and improvement of operation safety.

Description

Technical Field

[0001] The utility model relates to the field of coal mines, in particular to a movable dry-type drilling construction dust removal and gas over-limit prevention device. Background Art

[0002] For high-gas mines and coal and gas outburst mines, in recent years, the mines have vigorously implemented the gas control route of "one mine, one policy" and "one face, one policy", promoted regional control measures such as through-layer drilling to pre-extract coal seam gas in coal lane strips and along-layer drilling to pre-extract coal seam gas in the mining area, and applied technologies such as ground drilling fracturing pre-extraction and underground mechanical hole expansion and pressure relief, which have achieved certain results and ensured the normal mining and excavation succession and safe production of the mines. However, the underground through-layer and along-layer drilling in the mine mainly adopts dry drilling and wind slag removal methods, and a large amount of coal and rock dust is generated during the construction of the entire drilling section. Although the hole pressurized air injection dust removal device is adopted, the effect is not ideal. Coal and rock dust spread with the wind in the workplace, reducing visibility at the work site, damaging mechanical equipment, causing harm to the occupational health of construction workers, easily inducing pneumoconiosis, and posing a risk of coal seam explosion; at the same time, due to the high gas content in the coal seam and disturbance caused by drilling construction, a large amount of gas gushes into the workplace, making it more difficult to control gas in the tunnel. During the dry drilling construction process for gas extraction, secondary disasters such as coal combustion and gas combustion and explosion may occur due to reasons such as loss of drilling tools and rapid friction of drill rods; therefore, it is necessary to study a dry drilling construction dust removal and gas over-limit prevention device to solve the above problems. Utility Model Content

[0003] The utility model aims to solve the above-mentioned problems and provides a movable dry drilling construction dust removal and gas over-limit prevention device, which can ensure efficient dust removal and dust reduction, prevent gas over-limit, change the on-site working environment and improve working safety.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A movable dry drilling construction dust removal and gas over-limit prevention device comprises a dust removal mechanism, wherein the dust removal mechanism comprises a primary dust removal component and a secondary dust removal component, wherein the primary dust removal component is communicated with the secondary dust removal component, a moving component is arranged at the bottom end of the dust removal mechanism and is moved by the moving component, a power component is arranged at the upper end of the moving component, and the power component is connected to the moving component and the dust removal mechanism and provides a power source therefor.

[0006] Furthermore, the first-level dust removal assembly includes a first-level dust removal box and a first-level discharger. The first-level dust removal box is fixed at the upper end of the first-level discharger. The interior of the first-level dust removal box is a cyclone dust removal structure. A first-level slag air inlet is provided on one side of the top of the first-level dust removal box and is connected with the blowout preventer provided at the drilling construction hole through the first-level slag air inlet. The bottom end of the first-level dust removal box is a conical shrinkage structure and is provided with a first-level dust removal slag discharge port. The first-level dust removal slag discharge port is connected with the first-level discharger, and the material coming out of the first-level dust removal slag discharge port is discharged to the outside through the first-level discharger; a slag discharge port is provided at the top of the first-level dust removal box and is connected with the second-level dust removal assembly through the slag discharge port.

[0007] Furthermore, the secondary dust removal assembly includes a secondary dust removal box and a secondary discharger. The secondary dust removal box is fixedly connected to a porous filter cartridge frame, which is arranged horizontally and fixedly connected to the inner wall of the secondary dust removal box. The bottom end of the porous filter cartridge frame is detachably connected to a plurality of dust filter elements. A secondary slag air inlet is provided on one side of the secondary dust removal box and is connected with a slag air outlet in the primary dust removal mechanism through the secondary slag air inlet, and the secondary slag air inlet is located below the porous filter cartridge frame. A suction port is provided at the top of the secondary dust removal box and is connected with an underground suction system of a coal mine through the suction port. The bottom end of the secondary dust removal box is fixedly connected to the secondary discharger, and a secondary dust removal slag discharge port is provided at the bottom end of the secondary dust removal box and is connected with the secondary discharger through the secondary dust removal slag discharge port.

[0008] Furthermore, an air cylinder is provided on one side of the secondary dust removal box, one end of which is connected to the compressed air pipeline underground in the coal mine, and the other end of which is connected to a cleaning pipeline and is connected to a nozzle valve facing the inside of the dust removal filter element through the cleaning pipeline. An electromagnetic pulse control valve is provided on the cleaning pipeline, and the electromagnetic pulse control valve is fixedly connected to the side wall of the secondary dust removal box.

[0009] Furthermore, an inspection and maintenance port that can be opened and closed is provided on the front end wall of the secondary dust removal box to facilitate replacement of the dust removal filter element.

[0010] Furthermore, a carbon monoxide concentration detection port is provided at the top of the secondary dust removal box, and a carbon monoxide sensor is installed through the carbon monoxide concentration detection port.

[0011] Furthermore, the mobile component includes a tracked vehicle with tracks provided on both sides of the tracked vehicle, a base cover fixedly connected to the tracked vehicle, the base cover presenting a Z-shaped stepped structure, and square discharge holes are provided on the lower end face of the base cover and the higher end face of the base; the first-level unloader is fixedly connected to the lower end face of the base cover and the discharge port of the first-level unloader corresponds to the square discharge hole on the lower end face of the base cover, the second-level unloader is fixedly connected to the higher end face of the base cover and the discharge port of the second-level unloader corresponds to the square discharge hole on the higher end face of the base cover; the power component is fixedly connected to the upper end of the base cover.

[0012] Furthermore, the power assembly includes an explosion-proof motor and a hydraulic oil pump. The explosion-proof motor is connected to the hydraulic oil pump through a rotary connecting shaft, and the hydraulic oil pump is respectively connected to the crawler vehicle, the first-stage unloader, and the second-stage unloader by transmission.

[0013] Furthermore, the power assembly also includes an operating console, an oil tank, and a power control box; the upper end of the base cover is fixedly connected to a support platform through a support frame, the support platform is located on one side of the dust removal mechanism, and the operating console, the oil tank, and the power control box are fixedly connected to the support platform; the oil tank is provided with an oil inlet, an oil return port, and an oil outlet and is connected to the hydraulic oil pump pipeline through the oil inlet, the oil return port, and the oil outlet; the operating console is connected to the hydraulic oil pump and controls the working state of the hydraulic oil pump; the power control box is electrically connected to the explosion-proof motor and the electromagnetic pulse control valve respectively, and the power control box is connected to the external power supply line.

[0014] Compared with the prior art, the utility model has the following advantages and positive effects:

[0015] The device in the utility model has a compact structure, strong flexibility and maneuverability, and can be moved with the dry drilling construction position. The coal dust and gas generated in the drilling pass through the two-stage dust removal component, and the relatively clean gas enters the extraction system in the coal mine, effectively preventing the occurrence of gas exceeding the limit; at the same time, the coarse-grained slag is transported to the outside by the unloader, and the dust will be adsorbed on the dust filter element. Its efficient dust removal effect effectively improves the on-site working environment, reduces the occurrence of pneumoconiosis, and improves the occupational health level of coal miners; and the utility model is provided with a carbon monoxide sensor, which can achieve fire warning, early prediction, rapid response processing and other effects; it is of great significance to the efficient dust removal and dust reduction of underground coal mine operations, the elimination of gas exceeding the limit, the change of on-site working environment, and the improvement of working safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is the main structural diagram of the utility model;

[0018] Figure 2 It is a rear view structural diagram of the utility model;

[0019] Figure 3 It is a top view of the connection structure between the base cover and the explosion-proof motor;

[0020] Figure 4 This is the internal structure diagram of the secondary dust removal box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0022] like Figures 1 to 4 As shown, this embodiment discloses a movable dry drilling construction dust removal and gas over-limit prevention device, which includes three parts: a primary dust removal component, a secondary dust removal component, a crawler movable base and a motor oil tank power control mechanism. The primary dust removal component and the secondary dust removal component are compactly connected and installed on the base cover 32 of the crawler movable base and the motor oil tank power control mechanism; the crawler movable base and the motor oil tank power control mechanism are composed of a power component and a mobile component.

[0023] The primary dust removal assembly includes a primary slag air inlet 11, a primary dust removal box 12, a slag outlet 13, a primary dust removal slag outlet 14, and a primary discharger 15; the primary slag air inlet 11 is connected to the slag outlet of the dry drilling construction hole blowout prevention device through a steel wire soft rubber hose, so that the coal dust gas in the borehole can enter the primary dust removal box 12; the top of the primary dust removal box 12 is the slag outlet 13, the side is the primary slag air inlet 11, the bottom of the cone is the primary dust removal slag outlet 14, and the first dust removal box 12 is provided with a plurality of slag removal ports. The first part is a cyclone dust removal mechanism, coarse particles enter the first-level dust removal slag discharge port 14 through the outer vortex, and the untreated slag dust gas enters the slag discharge port 13 through the inner vortex; the slag discharge port 13 is fixed to the second-level slag inlet port 21 of the second-level dust removal component 2 by bolts, so that the untreated slag dust gas can enter the second-level dust removal component 2 for the next step of dust removal; the first-level dust removal slag discharge port 14 is fixedly connected with the first-level discharger 15 by bolts, so that the roughly treated coal dust gas can be discharged to the outside of the device through the first-level discharger 15 in a closed manner;

[0024] The secondary dust removal component includes a secondary slag air inlet 21, a secondary dust removal box 22, an inspection and maintenance port 23, an extraction port 24, a carbon monoxide concentration detection port 25, an air storage cylinder 26, an electromagnetic pulse control valve 27, a secondary dust removal slag discharge port 28, and a secondary discharger 29; the upper part of the secondary dust removal box 22 is a cube and the lower part is a cone. The top of the secondary dust removal box 22 has two extraction ports 24 and a carbon monoxide concentration detection port 25. The side close to the primary dust removal component 1 is the secondary slag air inlet 21, and the other side is fixedly installed with an electromagnetic pulse control valve 27 and an air storage cylinder 26 on the upper and lower sides. The front is the inspection and maintenance port 23, and the bottom of the cone is the secondary dust removal slag discharge port 28; the interior of the secondary dust removal box 22 is a filter cartridge dust removal mechanism, the upper part is a filter chamber, and a plurality of fireproof and antistatic filters are installed through a porous plate filter cartridge frame 221. The dust filter element 222 of the material, the untreated slag dust gas enters the secondary dust removal box 22 through the secondary slag gas inlet 21. Due to the sudden expansion of the inner cross-section, a part of the coarse particles settle into the secondary dust removal slag discharge port 28 under the action of inertia, and the small-sized coal dust particles are deposited on the outer surface of the dust filter element 222. When the coal dust on the surface of the dust filter element 222 is thick or after a certain period of time, the electromagnetic pulse control valve 27 sends a command to open the nozzle valve 223 toward the inside of the dust filter element, and the compressed air in the air storage cylinder 26 expands rapidly in the dust filter element 222, causing the dust filter element 222 to expand and vibrate, and under the action of the reverse airflow, the coal dust attached to the outer surface of the dust filter element 222 is peeled off and settled into the secondary dust removal slag discharge port 28. The gas mixture with less dust content or even no dust enters the extraction system through the extraction port 24;

[0025] Two extraction ports 24 are located on both sides of the top of the secondary dust removal box 22, which are convenient for connection with the extraction system pipelines on both sides of the underground tunnel;

[0026] The carbon monoxide concentration detection port 25 is used to install a carbon monoxide sensor for coal mines, which is used to monitor the carbon monoxide concentration in the device and the borehole. When the concentration is abnormal, the drilling is stopped in time, and the dry construction is changed to the wet construction to avoid the occurrence of disasters such as fire.

[0027] The inspection and maintenance port 23 is a door-type structure, fixed on the front of the secondary dust removal box 22, and can be used to check the adhesion of coal dust on the filter cartridge, replace the filter cartridge, etc.;

[0028] The gas storage cylinder 26 is a cylindrical structure, connected to the underground compressed air pipeline through a pipeline, and is used to store gas to provide gas source power for the electromagnetic pulse control valve 27 and the filter cartridge expansion;

[0029] The electromagnetic pulse control valve 27 is used to control the frequency of compressed air entering the filter cartridge. Within a certain period of time, the compressed air enters the filter cartridge, causing the filter cartridge to expand and vibrate, and the coal dust to peel off and settle, and the operation is repeated in this way.

[0030] The secondary dust removal and slag discharge port 28 is fixedly connected to the secondary discharger 29 by bolts, so that the coal dust gas after secondary treatment can be discharged to the outside of the device through the secondary discharger 29 in a sealed manner;

[0031] The crawler movable base and motor oil tank power control mechanism includes a crawler vehicle 31, a base cover 32, an explosion-proof motor hydraulic oil pump assembly 33, an oil tank 34, a power control box 35, an operation console 36, a crawler 37, a support frame 38, and a support platform 39; the base cover 32 is a "Z"-shaped step structure, one end is high and the other end is low, and the base cover 32 has two square slit discharge ports, the lower end square slit discharge port is used to be fixedly connected to the first-stage discharger 15 by bolts, and the high end square slit discharge port is used to be fixedly connected to the second-stage discharger 29 by bolts, which is more convenient for cleaning coal slag, and the crawler vehicle 31 is composed of a crawler device with one end high and the other end low, and is connected to the base cover 32 by bolts through two crossbeam pads;

[0032] The explosion-proof motor hydraulic oil pump assembly 33 includes an explosion-proof motor 331, two hydraulic oil pumps 332, a rotary connecting shaft 333, and a rotary shaft sleeve 334. The base of the explosion-proof motor 331 is fixed to the base cover 32 by bolts. The hydraulic oil pump 332 is respectively connected to the left and right tracks 37 of the crawler vehicle 31, the first-level unloader 15, and the second-level unloader 29 for transmission and provides power. The rotary connecting shaft 333 connects the explosion-proof motor 331 and the hydraulic oil pump 332, and a rotary shaft sleeve 334 is installed on the outer side of the rotary connecting shaft 333; the support platform 39 is welded and fixed to the base cover 32 by a support frame 38, and the explosion-proof motor hydraulic The oil pump assembly 33 has an operation console 36, an oil tank 34, and a power control box 35 on the top in sequence; the oil tank 34 supplies oil to the explosion-proof motor hydraulic oil pump assembly 33; the oil tank 34 has an oil inlet 341 and an oil return port 342 on the upper side, and an oil outlet 343 on the lower side, which are respectively connected to the hydraulic oil pump 332 to form a hydraulic power system; an oil level gauge 344 is provided on the outside of the oil tank 34 for conveniently checking the oil level; the operation console 36 is fixed on the side of the oil tank 34 close to the drilling rig, and is used to control the forward and backward operations of the left and right tracks 37 of the crawler vehicle 31 through the hydraulic oil pump, and to control the opening and rotation rate of the first-stage unloader 15 and the second-stage unloader 29.

[0033] The device in the utility model is used according to the following steps:

[0034] S1: The movable dry drilling construction dust removal and gas over-limit prevention device is transported to the vicinity of the dry drilling construction site by means of a crawler vehicle 31, so as to facilitate the connection of power lines, compressed air pipelines, extraction pipelines and other lines;

[0035] S2: Connect the first-level slag gas inlet 11 to the slag outlet of the dry drilling construction hole blowout prevention device through a steel wire soft rubber hose, and connect the extraction port 24 to the underground temporary extraction pipeline through a steel wire soft rubber hose;

[0036] S3: Connecting the air inlet of the air storage cylinder 26 to the underground compressed air system pipeline through a pipeline;

[0037] S4: Connect the power supply of the carbon monoxide sensor, the power supply of the electromagnetic pulse control valve and the power supply of the explosion-proof motor 51 to the downhole power supply through the power supply control box 35;

[0038] S5: further confirming that the joysticks of the operating console 36 are all in the middle position, that is, the left and right crawlers 37 of the crawler vehicle 31, the primary unloader 15 and the secondary unloader 29 are all in a stopped state;

[0039] S6: When the dry drilling starts normal drilling construction, the primary discharger 15 and the secondary discharger 29 are turned on to put them into operation, and the power control box 35 is turned on to put the primary dust removal component 1 and the secondary dust removal component 2 into operation;

[0040] S7: The slag dust gas in the dry drilling enters the primary slag air inlet 11 of the primary dust removal box 12 through the steel wire soft rubber hose, and the coarse particles enter the primary dust removal slag discharge port 14 through the outer vortex and are discharged through the primary discharger 15. The untreated slag dust gas enters the secondary dust removal box 22 through the slag discharge port 13 and the secondary slag air inlet 21 under the action of the inner vortex;

[0041] S8: After the untreated slag dust gas enters the secondary dust removal box 22, its cross section suddenly expands. Under the action of the airflow, a part of the coarse particles settle into the secondary dust removal slag discharge port 28 under the action of inertia, and the small-sized coal dust particles are deposited on the outer surface of the dust removal filter element. When the coal dust on the surface of the dust removal filter element is thick or after a certain period of time, the electromagnetic pulse control valve 27 issues a command to open the nozzle valve, and the compressed air in the air storage cylinder 26 expands rapidly in the dust removal filter element, causing the dust removal filter element to expand and vibrate. Under the action of the reverse airflow, the coal dust attached to the outer surface of the dust removal filter element is peeled off and settled into the secondary dust removal slag discharge port 28. The gas mixture with less dust content or even no dust enters the extraction system through the extraction port 24. At the same time, the coarse particles and small-sized coal dust entering the secondary dust removal slag discharge port 28 are discharged through the secondary discharger 29.

[0042] S9: The pressure difference between the borehole and the extraction system provides power for the slag dust gas stripped from the borehole to migrate to the primary dust removal component 1 and the secondary dust removal component 2;

[0043] S10: If the carbon monoxide concentration in the whole device is abnormal, the carbon monoxide sensor for coal mines at the carbon monoxide concentration detection port 25 will give an audible and visual warning. Drilling should be stopped in time and dry construction should be changed to wet construction to avoid disasters such as fire and ensure safe construction.

[0044] S11: After a period of construction, check the coal dust adhesion of the dust filter element through the inspection and maintenance port 23. If there is too much dust accumulation, the dust filter element with fireproof and antistatic filter material should be replaced in time.

[0045] The explosion-proof motor hydraulic oil pump assembly 33 and the power control box 35 used in this example are both commonly used technical means in this technical field. The power supply of the carbon monoxide sensor for coal mines, the power supply of the electromagnetic pulse control valve 27 and the explosion-proof motor 51 are all provided by the power control box 35.

[0046] The device in the utility model has a compact structure, strong flexibility and maneuverability, and can be moved with the dry drilling construction position. The coal dust and gas generated in the drilling pass through the two-stage dust removal component, and the relatively clean gas enters the extraction system in the coal mine, effectively preventing the occurrence of gas exceeding the limit; at the same time, the coarse-grained slag is transported to the outside by the unloader, and the dust will be adsorbed on the dust filter element. Its efficient dust removal effect effectively improves the on-site working environment, reduces the occurrence of pneumoconiosis, and improves the occupational health level of coal miners; and the utility model is provided with a carbon monoxide sensor, which can achieve fire warning, early prediction, rapid response processing and other effects; it is of great significance to the efficient dust removal and dust reduction of underground coal mine operations, the elimination of gas exceeding the limit, the change of on-site working environment, and the improvement of working safety.

Claims

1. A movable dry drilling construction dust removal and gas over-limit prevention device, comprising a dust removal mechanism, characterized in that: The dust removal mechanism includes a primary dust removal component and a secondary dust removal component. The primary dust removal component is connected to the secondary dust removal component. A moving component is provided at the bottom of the dust removal mechanism and moves through the moving component. A power component is provided at the upper end of the moving component. The power component is connected to the moving component and the dust removal mechanism and provides a power source for them.

2. The movable dry drilling construction dust removal and gas over-limit prevention device according to claim 1 is characterized in that: The first-level dust removal assembly includes a first-level dust removal box and a first-level discharger. The first-level dust removal box is fixed at the upper end of the first-level discharger. The interior of the first-level dust removal box is a cyclone dust removal structure. A first-level slag air inlet is provided on one side of the top of the first-level dust removal box and is connected with the anti-blowout protective gear arranged at the drilling construction hole through the first-level slag air inlet. The bottom end of the first-level dust removal box is a conical shrinkage structure and is provided with a first-level dust removal slag discharge port. The first-level dust removal slag discharge port is connected with the first-level discharger, and the material coming out of the first-level dust removal slag discharge port is discharged to the outside through the first-level discharger; a slag discharge port is provided on the top of the first-level dust removal box and is connected with the second-level dust removal assembly through the slag discharge port.

3. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 2 is characterized by: The secondary dust removal assembly includes a secondary dust removal box, a secondary discharger, and a secondary dust removal box. A porous plate filter cartridge frame is fixedly connected inside, the porous plate filter cartridge frame is horizontally arranged and fixedly connected to the inner wall of the secondary dust removal box, and a plurality of dust filter elements are detachably connected to the bottom end of the porous plate filter cartridge frame; a secondary slag air inlet is provided on one side of the secondary dust removal box and is connected with the slag air outlet in the primary dust removal mechanism through the secondary slag air inlet, and the secondary slag air inlet is located below the porous plate filter cartridge frame; a suction port is provided at the top of the secondary dust removal box and is connected with the underground suction system of the coal mine through the suction port; a secondary discharger is fixedly connected to the bottom end of the secondary dust removal box, a secondary dust removal slag discharge port is provided at the bottom end of the secondary dust removal box and is connected with the secondary discharger through the secondary dust removal slag discharge port.

4. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 3 is characterized by: An air cylinder is arranged on one side of the secondary dust removal box, one end of which is connected to the compressed air pipeline underground in the coal mine, and the other end of which is connected to a cleaning pipeline and is connected to a nozzle valve facing the inside of the dust removal filter through the cleaning pipeline. An electromagnetic pulse control valve is arranged on the cleaning pipeline, and the electromagnetic pulse control valve is fixedly connected to the side wall of the secondary dust removal box.

5. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 4 is characterized by: The front end wall of the secondary dust removal box is provided with an inspection and maintenance port that can be opened and closed to facilitate the replacement of the dust removal filter element.

6. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 5 is characterized by: The top of the secondary dust removal box is provided with a carbon monoxide concentration detection port, and a carbon monoxide sensor is installed through the carbon monoxide concentration detection port.

7. The movable dry drilling construction dust removal and gas over-limit prevention device according to claim 6 is characterized in that: The mobile assembly includes a crawler vehicle with tracks on both sides of the crawler vehicle, a base cover fixedly connected to the crawler vehicle, the base cover presenting a Z-shaped stepped structure, and square discharge holes are provided on the lower end face of the base cover and the higher end face of the base; the first-level unloader is fixedly connected to the lower end face of the base cover and the discharge port of the first-level unloader corresponds to the square discharge hole on the lower end face of the base cover, the second-level unloader is fixedly connected to the higher end face of the base cover and the discharge port of the second-level unloader corresponds to the square discharge hole on the higher end face of the base cover; the power assembly is fixedly connected to the upper end of the base cover.

8. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 7 is characterized by: The power assembly comprises an explosion-proof motor and a hydraulic oil pump. The explosion-proof motor is connected to the hydraulic oil pump via a rotary connecting shaft, and the hydraulic oil pump is respectively connected to the crawler vehicle, the first-stage unloader and the second-stage unloader by transmission.

9. The movable dry drilling construction dust removal and gas over-limit prevention device as claimed in claim 8, characterized in that: The power assembly also includes an operating console, an oil tank, and a power control box; the upper end of the base cover is fixedly connected to a support platform through a support frame, the support platform is located on one side of the dust removal mechanism, and the operating console, the oil tank, and the power control box are fixedly connected to the support platform; the oil tank is provided with an oil inlet, an oil return port, and an oil outlet and is connected to the hydraulic oil pump pipeline through the oil inlet, the oil return port, and the oil outlet; the operating console is connected to the hydraulic oil pump and controls the working state of the hydraulic oil pump; the power control box is electrically connected to the explosion-proof motor and the electromagnetic pulse control valve respectively, and the power control box is connected to the external power supply line.

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