Efficient dedusting and deslagging device for down-the-hole drill

Abstract

The utility model discloses an efficient dedusting and deslagging device for a down-the-hole drill, which comprises a frame, the front end of the frame is connected with a drilling machine through a hinge arm, the bottom of the drilling machine is provided with a dust collection cover, one side of the drilling machine is provided with a deslagging dust barrel, and the dust collection cover is connected with the deslagging dust barrel through a primary dust collection pipe; the slag and dust discharging barrel is connected with a dust removing mechanism arranged in the compartment through a second-stage dust suction pipe. A separation joint is mounted at the top of the slag and dust discharging barrel; according to the utility model, the separation joint for connecting the top of the slag and dust discharge barrel and the secondary dust suction pipe is improved, the bottom of the original circular pipe structure is transversely cut along the air inlet direction to form the circular arc-shaped pipeline, and the baffles are respectively arranged on the two sides of the bottom of the circular arc-shaped pipeline, so that the air inlet area is increased; when the pressure of the draught fan is increased, it can be guaranteed that medium particles cannot be sucked into the second-stage dust suction pipe along with dust, dust removal and dust removal are conducted through cooperation of the dust removal mechanism and the negative-pressure draught fan, and the deslagging and dust removal efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high -efficient dust removal and residue discharging device for a down -the -hole drill. BACKGROUND

[0002] Compared with other mining machinery, such as loaders, excavators, mine trucks and the like, the integrated down -the -hole drill is much more complex, in addition to the multiple functions of the hydraulic system, it also contains a high -power air compressor system and a dust collection system, the two systems not only have large maintenance workload, design defects and processing deviation of spare parts, which can seriously affect the production efficiency of the equipment. Due to the short time of domestic down -the -hole drill manufacturing and use, the customer often encounters design defects that are difficult to solve.

[0003] At present, the negative pressure value of the fan is small, the dust removal is not complete, and the dust collection filter element is easily blocked, which leads to the serious shortage of the negative pressure residue collection capacity of the drilling hole, and the large particles near the hole are discharged back into the hole and broken into fine particles again to be taken out of the hole by the dust collection system, resulting in very fine discharged ash.

[0004] Moreover, since the separation joint connected between the top of the existing residue discharge dust bucket and the secondary dust suction pipe is a bent pipe structure, the vertical part is connected to the center of the top of the residue discharge dust bucket and extends into the interior of the residue discharge dust bucket by a distance, the horizontal part is in the shape of a circular pipe and is connected with the secondary dust suction pipe, and the diameters of the horizontal part and the vertical part are the same, under the action of inertia, the mixed dust sucked from the side of the residue discharge dust bucket through the first dust suction pipe hits the arc-shaped material receiving surface in the interior of the separation joint, the large particles fall to the bottom of the bucket under the action of gravity and are discharged, and the dust is sucked into the pipe under the action of negative pressure, reaches the dust removal box through the secondary dust suction pipe, and is hung on the outer wall of the dust removal filter element.

[0005] However, if it is desired to improve the dust removal efficiency, the negative pressure value of the fan is adjusted to be higher on the basis of the design of the separation joint, and the medium and small particles will also be sucked into the secondary dust suction pipe together with the fine dust, because the secondary dust suction pipe is horizontally placed, the fine dust can be sucked away by the negative pressure wind, and the small particles will be accumulated at the bottom of the pipe, which will block the secondary dust suction pipe in a few days, so that the residue discharge dust bucket can no longer effectively separate the residue, and the drilling machine will be forced to stop drilling, thereby affecting the drilling efficiency of the drilling machine. TECHNICAL PROBLEM

[0006] The technical problem to be solved by the utility model is to provide a high -efficient dust removal and residue discharging device for a down -the -hole drill, which can ensure effective residue discharge of the residue discharge dust bucket while increasing the pressure of the fan, improve the residue discharge and dust removal efficiency, and ensure the drilling efficiency of the drilling machine.

[0007] To solve the above technical problems, the technical scheme adopted by the utility model is as follows.

[0008] A high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs includes a chassis with a carriage mounted on it and a tracked conveyor mechanism at the bottom of the chassis. The drilling rig is connected to the front end of the chassis via a hinged arm. A dust collection hood is installed at the bottom of the drilling rig, and a slag discharge bin is installed on one side of the drilling rig. The dust collection hood and the slag discharge bin are connected via a primary suction pipe. The slag discharge bin is connected to a dust removal mechanism located inside the carriage via a secondary suction pipe. A negative pressure fan is installed on the top of the carriage, and the negative pressure fan is connected to the dust removal mechanism via a duct. A solenoid valve is installed on the duct. A separation connector, connected to the secondary suction pipe and used to expand the air inlet area of ​​the secondary suction pipe, is installed on the top of the slag discharge bin. A control component is also installed inside the carriage, with the controlled ends of the dust removal mechanism, negative pressure fan, drilling rig, and solenoid valve connected to the output end of the control component.

[0009] The above-mentioned high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs includes a separation joint comprising a vertical part, a bending part, and a secondary dust suction pipe connection part arranged in sequence on the periphery of the end of the bending part. The inlet end of the vertical part extends into the slag discharge dust bin. The secondary dust suction pipe connection part is also provided with a secondary dust suction pipe inlet pipe communicating with the bending part at its center. The secondary dust suction pipe inlet pipe has an arc-shaped structure with its bottom cut off along the air inlet direction. Baffles are provided on both sides of the bottom of the secondary dust suction pipe inlet pipe.

[0010] The above-mentioned high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs has a diameter of the secondary dust suction pipe connection part that is larger than the diameter of the bending part. Two concentric annular plates are provided on the periphery of the secondary dust suction pipe connection part, and a slot for connecting the secondary dust suction pipe is formed between the two annular plates. The inner wall of the inner annular plate is spaced apart from the baffle.

[0011] The above-mentioned high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs includes a dust removal box and a dust removal air duct installed in the carriage. The dust removal box is connected to the dust removal air duct through a blowpipe. A pulse solenoid valve is installed on the blowpipe. The controlled end of the dust removal air duct and the pulse solenoid valve are respectively connected to the output end of the control component.

[0012] The above-mentioned high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs includes a dust removal duct connected to an air inlet pipe for storing air inside the dust removal duct. The air inlet pipe is connected to a blower, and a pressure regulating valve is installed on the air inlet pipe. The controlled end of the pressure regulating valve and the blower are respectively connected to the output end of the control component.

[0013] The above-mentioned high-efficiency dust removal and slag removal device for down-the-hole drilling rigs has a dust removal box with uniformly distributed dust removal filter elements inside. There are three rows of dust removal filter elements, with five elements in each row.

[0014] The aforementioned high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs has folding doors on the right and rear sides of the carriage for inspecting and maintaining the internal components of the carriage.

[0015] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0016] This utility model provides a high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs. By improving the separation joint connecting the top of the slag discharge dust bin to the secondary suction pipe, the original circular pipe structure is transversely cut at the bottom along the air inlet direction to form an arc-shaped pipe. Baffles are set on both sides of the bottom of the arc-shaped pipe to increase the air inlet area. This avoids the air inlet surface always being a circular structure after simple transverse cutting. Therefore, while increasing the fan pressure, it can ensure that medium-sized particles are not sucked into the secondary suction pipe along with the dust. Due to the reduced air velocity at the air inlet, medium-sized particles fall into the slag discharge dust bin under the action of gravity. With the cooperation of the dust removal mechanism and the negative pressure fan, dust removal and slag discharge efficiency is greatly improved. At the same time, the drilling rig will not be forced to stop due to blockage of the secondary suction pipe, thus ensuring the drilling efficiency of the drilling rig. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the specific structure of the present utility model;

[0018] Fig. 2 This is a schematic diagram of the specific structure of the separation connector described in this utility model;

[0019] Fig. 3 This is a schematic diagram of the specific structure of the dust removal mechanism described in this utility model;

[0020] Fig. 4 This is a schematic diagram of the internal structure of the dust collector box described in this utility model.

[0021] The components are: 1. Chassis, 2. Carriage, 3. Folding door, 4. Articulated arm, 5. Dust collection hood, 6. Primary dust collection pipe, 7. Slag discharge bin, 8. Separation joint, 9. Secondary dust collection pipe, 10. Tracked conveyor mechanism, 11. Negative pressure fan, 12. Dust collection box, 13. Dust cleaning duct, 14. Pulse solenoid valve, 15. Blowpipe, 16. Dust collection filter element, 17. Vertical part, 18. Bending part, 19. Secondary dust collection pipe connection part, 20. Slot, 21. Secondary dust collection pipe inlet pipe, 22. Baffle, 23. Air inlet pipe. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] A high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs, such as Figs. 1 to 4As shown, the system includes a frame 1, a carriage 2 mounted on the frame 1, a tracked conveyor mechanism 10 mounted on the bottom of the frame 1, a drilling rig connected to the front end of the frame 1 via a hinged arm 4, a dust collection hood 5 mounted on the bottom of the drilling rig, a slag discharge bin 7 mounted on one side of the drilling rig, a primary dust suction pipe 6 connecting the dust collection hood 5 and the slag discharge bin 7, a separation connector 8 mounted on the top of the slag discharge bin 7, the other end of the separation connector 8 connected to a dust removal mechanism located inside the carriage 2 via a secondary dust suction pipe 9, a negative pressure fan 11 mounted on the top of the carriage 2, the negative pressure fan 11 connected to the dust removal mechanism via an air duct, and a solenoid valve mounted on the air duct.

[0024] The interior of carriage 2 is also equipped with control components. The controlled ends of the dust removal mechanism, negative pressure fan 11, drilling rig, and solenoid valve are respectively connected to the output end of the control components.

[0025] The separation connector 8 includes a vertical part 17, a bent part 18, and a secondary dust suction pipe connection part 19 arranged on the periphery of the end of the bent part. The inlet end of the vertical part extends into the slag discharge bin 7. The diameter of the secondary dust suction pipe connection part 19 is larger than the diameter of the bent part 18. Two concentric annular plates are arranged on the periphery of the secondary dust suction pipe connection part 19, and a groove 20 for connecting to the secondary dust suction pipe 9 is formed between the two annular plates.

[0026] The secondary suction pipe connection 19 is also provided with a secondary suction pipe inlet pipe 21 that communicates with the bending part 18. The secondary suction pipe inlet pipe 21 is an arc-shaped structure with the bottom cut off along the air inlet direction. Baffles 22 are provided on both sides of the bottom of the secondary suction pipe inlet pipe 21. The baffles 22 are spaced apart from the inner wall of the inner annular plate. By setting the baffles 22, the bottom of the pipe is cut off to avoid forming a circular air inlet section, thereby increasing the area of ​​the air inlet end. This ensures that fine dust will not be sucked into the secondary suction pipe and accumulate when the negative pressure value of the fan increases.

[0027] Because of the improvements to the separation joint 8, the area of ​​the air inlet of the secondary dust collection pipe 9 has been increased. This allows the air velocity at the air inlet to be reduced when the pressure of the negative pressure fan 11 increases, while the fan air volume remains constant. This enables medium-sized particles that impact the material receiving surface inside the separation joint to fall directly below the slag discharge bucket under the action of gravity, instead of being sucked into the secondary dust collection pipe, thus preventing the accumulation of particles in the secondary dust collection pipe and causing blockage.

[0028] The dust removal mechanism includes a dust removal box 12 and a dust removal air duct 13 installed in the carriage 2. The dust removal box 12 is connected to the dust removal air duct 13 through a blow pipe 15. A pulse solenoid valve 14 is installed on the blow pipe 15. The controlled end of the dust removal air duct 13 and the pulse solenoid valve 14 are respectively connected to the output end of the control component.

[0029] The dust removal duct 13 is also connected to the air inlet pipe 23 for filling the dust removal duct 13 with air to ensure the dust removal effect of the dust filter element. The air inlet pipe 23 is connected to the air supply fan, which is a positive pressure air supply fan. A pressure regulating valve is installed on the air inlet pipe 23. The pressure regulating valve and the controlled end of the air supply fan are respectively connected to the output end of the control component.

[0030] The dust collection box 12 is equipped with evenly distributed dust collection filter elements 16, with three rows of five filter elements in each row.

[0031] When dust removal is required, the solenoid valve connected to the dust collection box 12 and the air duct opens, and the pulse solenoid valve 14 connected to the dust removal air duct 13 closes, so that the dust in the secondary dust collection pipe is adsorbed onto the surface of the dust collection filter under the action of the negative pressure fan.

[0032] When dust removal is required, the valve port of the pulse solenoid valve 14 connected to the dust collection box 12 and the dust removal duct 13 opens, and the valve port of the solenoid valve connected to the duct closes, causing the dust removal duct to instantly release the internal air pressure and back-blown into the dust collection filter element 16, blowing off the dust on the surface of the dust collection filter element. The blown-off dust falls under the action of gravity, and by increasing the pressure inside the dust removal duct 13, it can be ensured that the dust attached to the surface of the dust collection filter element is completely removed.

[0033] After the dust removal is completed, gas can be stored inside the dust removal duct by the air supply fan to prepare for the next backflushing dust removal operation of the dust collector filter.

[0034] Folding doors 3 are installed on the right and rear sides of carriage 2, allowing for inspection and maintenance of the internal components of the carriage.

[0035] The frame, carriage, drilling rig, and track drive mechanism in this utility model are all common structures of down-the-hole drilling rigs and can be purchased and assembled on the market. Therefore, they are not described in detail in the specification.

[0036] This invention, through modification of the separation joint, can improve the drilling speed of the drilling rig by increasing the pressure of the negative pressure fan while ensuring slag removal efficiency. Experimental data shows that the drilling speed before the modification was 24 meters per hour, while the drilling speed after the modification was significantly increased to over 28 meters per hour. The drilling speed of the drilling rig is significantly improved, and more work can be completed with the same fuel consumption. Each drilling rig can save about 80,000 yuan in fuel costs per year (based on 2,000 hours of operation).

[0037] During operation, the dust collection box and the cleaning air duct work together to achieve effective dust removal, ensuring that no dust overflows during drilling. The pressure of the gas supplied by the air blower into the cleaning air duct is adjusted by the pressure regulating valve. In this embodiment, the pressure is increased from 0.65 MPa to 0.8 MPa. When the air inside the cleaning air duct blows back towards the dust collector filter element through the blowpipe, the dust on the surface of the dust collector filter element can be blown off, solving the defect of incomplete dust removal.

[0038] This utility model provides a high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs. By improving the separation joint connecting the top of the slag discharge dust bin to the secondary suction pipe, the original circular pipe structure is transversely cut at the bottom along the air inlet direction to form an arc-shaped pipe. Baffles are set on both sides of the bottom of the arc-shaped pipe to increase the air inlet area. This avoids the air inlet surface always being a circular structure after simple transverse cutting. Therefore, while increasing the fan pressure, it can ensure that medium-sized particles are not sucked into the secondary suction pipe along with the dust. Due to the reduced air velocity at the air inlet, medium-sized particles fall into the slag discharge dust bin under the action of gravity. With the cooperation of the dust removal mechanism and the negative pressure fan, dust removal and slag discharge efficiency is greatly improved. At the same time, the drilling rig will not be forced to stop due to blockage of the secondary suction pipe, thus ensuring the drilling efficiency of the drilling rig.

Claims

1. A high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs, characterized in that: The system includes a frame (1), a carriage (2) mounted on the frame (1), and a tracked conveyor mechanism (10) mounted at the bottom of the frame (1). A drilling rig is connected to the front end of the frame (1) via a hinged arm (4). A dust collection hood (5) is mounted at the bottom of the drilling rig, and a slag discharge dust bin (7) is installed on one side of the drilling rig. The dust collection hood (5) and the slag discharge dust bin (7) are connected via a primary suction pipe (6). The slag discharge dust bin (7) is connected to a dust removal mechanism located inside the carriage (2) via a secondary suction pipe (9). The top of the carriage (2) is equipped with a negative pressure fan (11), which is connected to the dust removal mechanism through a duct. A solenoid valve is installed on the duct. The top of the slag discharge bucket (7) is equipped with a separation connector (8) that is connected to the secondary dust suction pipe (9) and used to expand the air intake area of ​​the secondary dust suction pipe (9). The inside of the carriage (2) is also equipped with a control component. The controlled ends of the dust removal mechanism, the negative pressure fan (11), the drilling rig, and the solenoid valve are respectively connected to the output end of the control component.

2. The high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 1, characterized in that: The separation connector (8) includes a vertical part (17), a bent part (18) connected in sequence, and a secondary dust suction pipe connection part (19) provided on the periphery of the end of the bent part (18). The inlet end of the vertical part (17) extends into the slag discharge bucket (7). The secondary dust suction pipe connection part (19) is also provided with a secondary dust suction pipe inlet pipe (21) communicating with the bent part (18) in the center. The secondary dust suction pipe inlet pipe (21) is an arc-shaped structure with the bottom cut off along the air inlet direction. Baffles (22) are provided on both sides of the bottom of the secondary dust suction pipe inlet pipe (21).

3. The high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 2, characterized in that: The diameter of the secondary suction pipe connection part (19) is larger than the diameter of the bending part (18). Two concentric annular plates are provided on the periphery of the secondary suction pipe connection part (19). A slot (20) for connecting the secondary suction pipe (9) is formed between the two annular plates. The inner wall of the inner annular plate is spaced apart from the baffle (22).

4. The high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 1, characterized in that: The dust removal mechanism includes a dust removal box (12) and a dust removal air duct (13) installed in the carriage (2). The dust removal box (12) is connected to the dust removal air duct (13) through a blow pipe (15). A pulse solenoid valve (14) is installed on the blow pipe (15). The controlled ends of the dust removal air duct (13) and the pulse solenoid valve (14) are respectively connected to the output end of the control component.

5. A high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 4, characterized in that: The cleaning duct (13) is also connected to an air inlet pipe (23) for storing air in the cleaning duct (13). The air inlet pipe (23) is connected to a blower. A pressure regulating valve is provided on the air inlet pipe (23). The pressure regulating valve and the controlled end of the blower are respectively connected to the output end of the control component.

6. The high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 4, characterized in that: The dust collection box (12) is equipped with uniformly distributed dust collection filter elements (16), with three rows of dust collection filter elements (16) and five elements in each row.

7. A high-efficiency dust removal and slag discharge device for down-the-hole drilling rigs according to claim 1, characterized in that: The right and rear sides of the carriage (2) are respectively equipped with folding doors (3) for inspecting and repairing the internal components of the carriage.

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