Down-the-hole drill for mine field blasting drilling

Abstract

The invention relates to the technical field of down-the-hole drills, in particular to a down-the-hole drill for mine field blasting drilling, which comprises a sliding frame, an air cylinder is fixedly mounted in the middle of the inner surface of the sliding frame, a length supplementing sliding rod is movably arranged in the middle of the upper surface of the air cylinder, and the other end of the length supplementing sliding rod penetrates through the upper surface of the sliding frame and extends to the outside; connecting rods are fixedly installed at the ends, extending outwards, of the length-supplementing sliding rods, length-supplementing auxiliary rods are fixedly installed at the two ends of the lower surfaces of the connecting rods, a movable frame is movably installed in the middle of the front end of the outer surface of the sliding frame, and the other ends of the length-supplementing auxiliary rods penetrate through the two sides of the upper surface of the sliding frame to be fixedly installed and connected with the two sides of the outer surface of the movable frame; a rotary power head mechanism is fixedly installed at the front end of the outer surface of the movable frame. According to the drilling device, the influence of flying dust and splashed broken stones generated in a dry drilling hole forming mode on the working environment and the health and safety of workers can be reduced, meanwhile, the inner wall of a drilled hole can be extruded and polished step by step, and the using effect of the drilled hole can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of down-the-hole drilling, in particular to a down-the-hole drill used for blasting drilling in a mine. Background Art

[0002] Mine blasting drilling refers to a method of rock mining using drilling and blasting technology in a mine. It requires the use of drilling tools to drill blastholes in the mined ore body. Common drilling tools include down-the-hole drills.

[0003] Down-the-hole drills are used to drill holes in rocks before blasting. Existing down-the-hole drills usually use dry drilling and wind pressure to clean holes during the drilling process. In this case, a lot of dust will be generated at the drilling site, and there is also a risk of splashing of drilling debris, which poses a certain threat to the working environment and the health and safety of workers. In addition, when encountering loose strata during drilling, it is difficult to maintain the stability of the borehole, and the borehole is prone to being covered, affecting the normal use of the borehole. To this end, we propose a down-the-hole drill for mine blasting drilling. Summary of the invention

[0004] The object of the present invention is to provide a down-the-hole drill for blasting drilling in a mine to solve the problems raised by the above-mentioned background technology.

[0005] The object of the present invention can be achieved by the following technical scheme: A down-the-hole drill for blasting drilling in a mine, comprising a slide, a cylinder is fixedly installed in the middle of the inner surface of the slide, a lengthening slide rod is movably provided in the middle of the upper surface of the cylinder, the other end of the lengthening slide rod passes through the upper surface of the slide and extends to the outside, a connecting rod is fixedly installed at the end of the lengthening slide rod extending to the outside, and lengthening auxiliary rods are fixedly installed at both ends of the lower surface of the connecting rod;

[0006] A movable frame is movably installed in the middle of the front end of the outer surface of the slide, and the other ends of the supplementary auxiliary rods penetrate the two sides of the upper surface of the slide and are fixedly installed and connected to the two sides of the outer surface of the movable frame. A rotary power head mechanism is fixedly installed on the front end of the outer surface of the movable frame, and a drill rod is installed in the middle of the lower surface of the rotary power head mechanism. A limit plate is fixedly installed in the middle of the outer surface of the drill rod, and a first expansion sleeve and a second expansion sleeve are fixedly installed on both sides of the lower surface of the limit plate, respectively. An impactor is fixedly installed on the other end of the drill rod, and a drill bit is fixedly installed on the other end of the impactor;

[0007] A drill protector is fixedly installed on the inner bottom surface of the slide, a through opening is opened in the middle of the front end of the upper surface of the drill protector, a plurality of limit openings are opened at the front end of the upper surface of the drill protector, and the plurality of limit openings are opened in an arc-shaped interval combination, a thread groove is fixedly installed on the front end of the lower surface of the drill protector in the shape of a protruding ring, a dust cover is fixedly installed below the front end of the lower surface of the drill protector, a thread ring is fixedly installed on the upper surface of the dust cover, and the thread ring is spirally inserted and installed in the thread groove, and a plurality of positioning support plates are fixedly installed on the lower part of the inner surface of the dust cover;

[0008] The drill protector is installed with a buffer cover through the inner surface of the limit opening, the inner surface of the buffer cover is penetrated to the outer surface and a plurality of openings are opened, the buffer cover is movably installed with a buffer plate through the inner side of the opening, the buffer cover is fixedly installed with a filter screen through the outer side of the opening, a plurality of compression springs are commonly provided on the side close to the filter screen and the buffer plate, the lower surface of the buffer cover is in contact with the upper surface of the positioning support plate, and there is a gap between the outer surface of the buffer cover and the inner surface of the dust collecting cover;

[0009] A dust extractor is fixedly installed at the rear end of the outer surface of the drill protector, a conduit is fixedly installed at the extraction end of the dust extractor, and the other end of the conduit penetrates the upper surface of the drill protector and is inserted into the interval between the buffer cover and the dust collecting cover.

[0010] As a further improvement of the present invention, the first expansion sleeve and the second expansion sleeve are jointly sleeved on the outer surface of the drill pipe in a cone-shaped combination installation, and the upper surfaces of the first expansion sleeve and the second expansion sleeve are provided with a plurality of protruding positioning pins, and the other ends of the positioning pins pass through the upper surface of the limit plate, extend to the outside and are provided with threads, and the positioning pins pass through the limit plate and extend to the outer surface of one end thereof, and a locking nut is installed on the spiral sleeve.

[0011] As a further improvement of the present invention, fixing ears are welded and fixedly installed on both sides of the upper part of the rear end of the outer surface of the slide, and a leg is movably installed on the other end of the fixing ear through an axle seat. Connecting ears are welded and fixedly installed on both sides of the lower part of the rear end of the outer surface of the slide, and a supporting foot is inserted through the upper surface of the connecting ear, and positioning plates are fixedly installed on the outer surfaces of the supporting legs and the supporting feet.

[0012] As a further improvement of the present invention, the buffer cover is provided with a plurality of dust passing openings at arc-shaped intervals corresponding to the limiting opening.

[0013] As a further improvement of the present invention, the dust collecting hood is a corrugated telescopic sleeve structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the process of drilling, the present invention provides a dust collecting structure at the drill mouth, so that the dust and flying gravel generated in the dry drilling method can be blocked, which is beneficial to reducing the impact on the working environment and the health and safety of the workers. The dust collecting structure has a good buffering and protective effect while blocking the dust and flying gravel, which is beneficial to reducing the damage degree of the dust collecting structure and extending its service life. The blocked dust can be extracted and discharged in a centralized manner, so as to further ensure the safety of the working environment.

[0016] When encountering loose strata during the drilling process, the present invention can gradually pressurize and extrude the inner wall of the borehole through the expansion mechanism connected to the drill rod, which is beneficial to extrude the drilled strata to make them more tightly connected while improving the neatness of the borehole, thereby improving the stability of the borehole in the loose strata, avoiding the problem of the borehole being covered by the loose strata, and ensuring the normal use of the borehole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the rear three-dimensional structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure disassembly of the impactor of the present invention;

[0021] Figure 4 It is a schematic diagram of the split cutaway structure of the drill protector of the present invention;

[0022] Figure 5 It is a schematic diagram of the split structure of the drill protector of the present invention;

[0023] Figure 6 It is a schematic diagram of the split section of the buffer cover structure of the present invention.

[0024] In the figure: 1. slide; 2. cylinder; 3. extended slide rod; 4. connecting rod; 5. extended auxiliary rod; 6. movable frame; 7. rotary power head mechanism; 8. drill rod; 801. limit plate; 802. first expansion sleeve; 803. second expansion sleeve; 804. positioning pin; 805. locking nut; 9. drill bit; 10. drill protector; 1001. threaded groove; 1002. limit mouth; 11. fixing ear; 12. support leg; 13. support foot; 14. dust hood; 1401. threaded ring; 1402. positioning support plate; 15. buffer hood; 1501. buffer plate; 1502. filter; 1503. compression spring; 16. dust extractor; 1601. conduit; 17. impactor. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 - Figure 6 As shown, a down-the-hole drill for blasting and drilling in a mine comprises a slide 1, both sides of the upper rear end of the outer surface of the slide 1 are welded and fixedly installed with fixing ears 11, the other end of the fixing ear 11 is movably installed with a leg 12 through an axle seat, both sides of the lower rear end of the outer surface of the slide 1 are welded and fixedly installed with connecting ears, the upper surface of the connecting ear is penetrated and inserted with a leg 13, the outer surfaces of the leg 12 and the leg 13 are sleeved and fixedly installed with positioning pieces, a cylinder 2 is fixedly installed in the middle of the inner surface of the slide 1, a supplementary slide rod 3 is movably provided in the middle of the upper surface of the cylinder 2, the other end of the supplementary slide rod 3 penetrates the upper surface of the slide 1 and extends to the outside, a connecting rod 4 is fixedly installed on the end of the supplementary slide rod 3 extending to the outside, and a supplementary auxiliary rod 5 is fixedly installed on both ends of the lower surface of the connecting rod 4;

[0027] The entire down-the-hole drilling structure is supported by the carriage 1, and the carriage 1 can be supported by the legs 12 in cooperation with the feet 13, so that the angle of the carriage 1 can be adjusted during use, thereby facilitating the smooth drilling. In the process of the carriage 1 being supported by the legs 12, the support angle of the legs 12 can be adjusted by means of the fixing ears 11 in cooperation with the shaft seat;

[0028] By starting the cylinder 2, the extension slide rod 3 can be controlled to perform telescopic movement. During the telescopic movement of the extension slide rod 3, the extension sub-rod 5 can be synchronously driven to perform lifting movement, and then the lifting movement of the movable frame 6 is controlled by utilizing the lifting movement of the extension sub-rod 5 to facilitate the adjustment of the drilling depth.

[0029] A movable frame 6 is movably installed in the middle of the front end of the outer surface of the slide 1, and the other ends of the lengthened auxiliary rods 5 penetrate through both sides of the upper surface of the slide 1 and are fixedly installed and connected to both sides of the outer surface of the movable frame 6. A rotary power head mechanism 7 is fixedly installed on the front end of the outer surface of the movable frame 6, and a drill rod 8 is installed in the middle of the lower surface of the rotary power head mechanism 7. A limit plate 801 is fixedly installed in the middle of the outer surface of the drill rod 8, and a first expansion sleeve 802 and a second expansion sleeve 803 are fixedly installed on both sides of the lower surface of the limit plate 801, respectively. An impactor 17 is fixedly installed on the other end of the drill rod 8, and a drill bit 9 is fixedly installed on the other end of the impactor 17;

[0030] The rotary power head mechanism 7 cooperates with the cylinder 2 to control the drill rod 8 to rotate and drive the impactor 17 to generate high-frequency impact force and then hit the drill bit 9. The drill bit 9 can transmit energy to the rock when it comes into contact with the rock. At the same time, the drill rod 8 drives the drill bit 9 by rotating, causing it to rotate in the rock. Under the action of impact and rotation, the drill bit 9 moves toward the rock and crushes the rock to start drilling.

[0031] The first expansion sleeve 802 and the second expansion sleeve 803 are jointly sleeved on the outer surface of the drill pipe 8 in a cone-shaped assembly. The upper surfaces of the first expansion sleeve 802 and the second expansion sleeve 803 are both provided with a plurality of protruding positioning pins 804. The other ends of the positioning pins 804 penetrate the upper surface of the limit plate 801 and extend to the outside and are provided with threads. The positioning pins 804 penetrate the limit plate 801 and extend to the outer end. The outer surface of the outer end is spirally sleeved and installed with a locking nut 805.

[0032] The inner wall of the borehole can be squeezed and polished by the first expansion sleeve 802 and the second expansion sleeve 803 , and the positioning pin 804 cooperates with the locking nut 805 to control the first expansion sleeve 802 and the second expansion sleeve 803 to be installed and removed relative to the limit plate 801 .

[0033] A drill protector 10 is fixedly installed on the inner bottom surface of the slide 1, a through opening is opened in the middle of the front end of the upper surface of the drill protector 10, a plurality of limit openings 1002 are opened at the front end of the upper surface of the drill protector 10, and the plurality of limit openings 1002 are opened in an arc-shaped interval combination, a thread groove 1001 is fixedly installed at the front end of the lower surface of the drill protector 10 in a convex ring shape, a dust cover 14 is fixedly installed below the front end of the lower surface of the drill protector 10, a thread ring 1401 is fixedly installed on the upper surface of the dust cover 14, and the thread ring 1401 is spirally inserted and installed in the thread groove 1001, a plurality of positioning support plates 1402 are fixedly installed on the lower part of the inner surface of the dust cover 14, and the dust cover 14 is a corrugated telescopic sleeve structure;

[0034] The drill bit 9 can pass through the opening on the drill protector 10. The threaded groove 1001 and the threaded ring 1401 can be used to control the installation and disassembly of the dust cover 14 relative to the drill protector 10. When the dust cover 14 is a corrugated telescopic sleeve structure, it can be adjusted according to the distance between the drill protector 10 and the drill hole to achieve a better dust prevention effect.

[0035] The drill protector 10 is installed with a buffer cover 15 inserted through the inner surface of the limit opening 1002. The buffer cover 15 is provided with a plurality of dust passing openings at arc intervals corresponding to the limit opening 1002. The inner surface of the buffer cover 15 is penetrated to the outer surface and a plurality of openings are provided. The buffer cover 15 is movably provided with a buffer plate 1501 through the inner side of the opening. The buffer cover 15 is fixedly provided with a filter screen 1502 through the outer side of the opening. A plurality of compression springs 1503 are provided on the side close to the filter screen 1502 and the buffer plate 1501. The lower surface of the buffer cover 15 abuts against the upper surface of the positioning support plate 1402. There is a gap between the outer surface of the buffer cover 15 and the inner surface of the dust collecting cover 14.

[0036] The limiting opening 1002 facilitates the installation and disassembly between the buffer cover 15 and the drill protector 10. The buffer plate 1501 arranged on the buffer cover 15 can block the flying gravel. When the gravel contacts the buffer plate 1501, the impact force it carries will squeeze the compression spring 1503. The compression spring 1503 can shrink to buffer the impact force carried by the gravel. When the impact force is consumed, the buffer plate 1501 can be driven to reset and rebound, thereby reducing the damage of the dust cover 14 to the gravel. When the buffer plate 1501 is buffered by the impact displacement of the gravel, the filter screen 1502 can allow the dust to pass through the buffer cover 15 normally and enter the gap between the buffer cover 15 and the dust cover 14. When the lower surface of the buffer cover 15 and the upper surface of the positioning support plate 1402 abut against each other, the dust cover 14 can be supported and unfolded by the movement of the buffer cover 15.

[0037] A dust extractor 16 is fixedly mounted on the rear end of the outer surface of the drill protector 10, and a guide tube 1601 is fixedly mounted on the extraction end of the dust extractor 16. The other end of the guide tube 1601 penetrates the upper surface of the drill protector 10 and is inserted into the interval between the buffer cover 15 and the dust collecting cover 14.

[0038] When the dust enters the gap between the buffer cover 15 and the dust collecting cover 14, the dust extractor 16 is started to cooperate with the duct 1601 to extract the dust and discharge it in a centralized manner.

[0039] When the present invention is in use, the vertical position of the slide 1 can be adjusted by means of the support legs 12 and the support feet 13. When the slide 1 is adjusted to the drilling operation position, the position of the drill bit 9 can be directed toward the drilling position. At this time, the starting cylinder 2 can be started to control the extension slide rod 3 to perform telescopic movement, thereby synchronously driving the extension auxiliary rod 5 to perform lifting movement. The lifting movement of the extension auxiliary rod 5 is used to control the lifting movement of the movable frame 6. At the same time, the rotary power head mechanism 7 is started to cooperate with the cylinder 2 to control the rotation of the drill rod 8 and drive the impactor 17 to generate high-frequency impact force and then hit the drill bit 9. When the movable frame 6 moves downward, the drill bit 9 contacts the rock and transmits energy to the rock. At the same time, the drill rod 8 drives the drill bit 9 by rotating to make it rotate in the rock. Under the action of impact and rotation, the drill bit 9 moves toward the rock and breaks the rock to start the drilling operation.

[0040] During the drilling process, the first expansion sleeve 802 and the second expansion sleeve 803 can squeeze and grind the inner wall of the borehole. Since the first expansion sleeve 802 and the second expansion sleeve 803 are jointly sleeved on the outer surface of the drill rod 8 in a cone-shaped assembly, the diameter range of the extrusion and grinding will gradually increase as the drill bit 9 goes deeper into the borehole, thereby squeezing the borehole formation to make it more tightly connected and improving the neatness of the borehole.

[0041] Secondly, at the opening of the drilled hole, since the lower surface of the buffer cover 15 and the upper surface of the positioning support plate 1402 abut against each other, the dust cover 14 can be supported and expanded by the movement of the buffer cover 15. In this case, the buffer cover 15 can be pushed to move toward the opening of the drilled hole. During the movement of the buffer cover 15, the dust cover 14 can be driven to move toward the opening of the drilled hole to open and complete the wrapping of the opening. At this time, the buffer plate 1501 provided on the buffer cover 15 can be used to block the splashing gravel generated at the opening. When the gravel contacts the buffer plate 1501, the impact force it carries will cause the compression spring 1503 to cause The compression spring 1503 can be squeezed and contracted to buffer the impact force carried by the gravel. When the impact force is consumed, the buffer plate 1501 can be driven to reset and rebound, thereby reducing the damage of the dust cover 14 to the gravel. At the same time, the filter 1502 can allow the dust to pass through the buffer cover 15 normally and enter the gap between the buffer cover 15 and the dust cover 14 when the buffer plate 1501 is buffered by the impact displacement of the gravel. When the dust enters the gap between the buffer cover 15 and the dust cover 14, the dust extractor 16 can be started to cooperate with the duct 1601 to extract the dust and discharge it in a centralized manner, so as to reduce the impact of dust on the working environment and the health and safety of the staff.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A down-the-hole drill for blasting drilling in a mine, comprising a slide (1), a cylinder (2) being fixedly mounted in the middle of the inner surface of the slide (1), characterized in that: A lengthening slide rod (3) is movably provided in the middle of the upper surface of the cylinder (2); the other end of the lengthening slide rod (3) penetrates the upper surface of the slide frame (1) and extends outward; a connecting rod (4) is fixedly installed at the end of the lengthening slide rod (3) extending outward; and lengthening auxiliary rods (5) are fixedly installed at both ends of the lower surface of the connecting rod (4); A movable frame (6) is movably mounted in the middle of the front end of the outer surface of the slide (1); a rotary power head mechanism (7) is fixedly mounted on the front end of the outer surface of the movable frame (6); a drill rod (8) is installed in the middle of the lower surface of the rotary power head mechanism (7); a limit plate (801) is fixedly mounted in the middle of the outer surface of the drill rod (8); a first expansion sleeve (802) and a second expansion sleeve (803) are respectively fixedly mounted on both sides of the lower surface of the limit plate (801); an impactor (17) is fixedly mounted on the other end of the drill rod (8); and a drill bit (9) is fixedly mounted on the other end of the impactor (17); A drill protector (10) is fixedly mounted on the inner bottom surface of the slide (1), a through opening is provided in the middle of the front end of the upper surface of the drill protector (10), a plurality of limit openings (1002) are provided at the front end of the upper surface of the drill protector (10), a thread groove (1001) is fixedly mounted in the front end of the lower surface of the drill protector (10) in the shape of a protruding ring, a dust cover (14) is fixedly mounted below the front end of the lower surface of the drill protector (10), a thread ring (1401) is fixedly mounted on the upper surface of the dust cover (14), and a plurality of positioning support plates (1402) are fixedly mounted on the lower part of the inner surface of the dust cover (14); The drill protector (10) is installed with a buffer cover (15) inserted through the inner surface of the limiting opening (1002); the inner surface of the buffer cover (15) penetrates through the outer surface and is provided with a plurality of openings; a buffer plate (1501) is movably installed on the inner side of the opening of the buffer cover (15); a filter screen (1502) is fixedly installed on the outer side of the opening of the buffer cover (15); and a plurality of compression springs (1503) are provided on the side close to the filter screen (1502) and the buffer plate (1501).

2. A down-the-hole drill for mine blasting drilling according to claim 1, characterized in that: The first expansion sleeve (802) and the second expansion sleeve (803) are jointly sleeved on the outer surface of the drill rod (8) and assembled in a cone shape. The upper surfaces of the first expansion sleeve (802) and the second expansion sleeve (803) are each provided with a plurality of protruding positioning pins (804). The other ends of the positioning pins (804) penetrate through the upper surface of the limiting plate (801) and extend to the outside and are provided with threads. The positioning pins (804) penetrate through the limiting plate (801) and extend to the outer surface of one end thereof and are spirally sleeved and provided with a locking nut (805).

3. A down-the-hole drill for mine blasting drilling according to claim 2, characterized in that: Fixing ears (11) are welded and fixedly installed on both sides of the upper part of the rear end of the outer surface of the slide (1), and a support leg (12) is movably installed on the other end of the fixing ear (11) through an axle seat. Connecting ears are welded and fixedly installed on both sides of the lower part of the rear end of the outer surface of the slide (1), and a support leg (13) is inserted and installed through the upper surface of the connecting ear. Positioning plates are sleeved and fixedly installed on the outer surfaces of the support leg (12) and the support leg (13).

4. A down-the-hole drill for mine blasting drilling according to claim 3, characterized in that: The buffer cover (15) is provided with a plurality of dust passing openings at arc-shaped intervals corresponding to the limit opening (1002); the other ends of the extended auxiliary rods (5) pass through both sides of the upper surface of the slide (1) and are fixedly installed and connected to both sides of the outer surface of the movable frame (6); the lower surface of the buffer cover (15) and the upper surface of the positioning support plate (1402) are in contact with each other, and there is a gap between the outer surface of the buffer cover (15) and the inner surface of the dust collecting cover (14).

5. A down-the-hole drill for mine blasting drilling according to claim 4, characterized in that: The dust collecting cover (14) is a corrugated telescopic sleeve structure, a plurality of the limiting openings (1002) are arranged in an arc-shaped spaced combination, and the threaded ring (1401) is spirally inserted and installed in the threaded groove (1001); A dust extractor (16) is fixedly mounted on the rear end of the outer surface of the drill protector (10), a guide tube (1601) is fixedly mounted on the extraction end of the dust extractor (16), and the other end of the guide tube (1601) penetrates the upper surface of the drill protector (10) and is inserted into the gap between the buffer cover (15) and the dust collecting cover (14).

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