A dust removal assembly, a drilling device comprising the assembly, and application of the device in static blasting technology

Abstract

This application belongs to the field of drilling device technology, and particularly relates to a dust removal component, a drilling device including the component, and the application of the device in static blasting technology. The dust removal component includes a dustproof cylinder, an end plate, and a drill rod opening. It also includes a positioning cylinder unit inserted into the drill rod opening, abutting the upper surface of the end plate, and used to fit the drill rod; a brush cylinder composite unit screwed onto the inner annular surface of the positioning cylinder unit, with bristles abutting the drill rod; and a dual-purpose (removable and positioned) composite rod unit disposed on the upper end surface of the positioning cylinder unit, used for rotating the brush cylinder composite unit during disassembly and replacement, and for blocking and limiting the drilling rig body during drilling operations.

Description

Technical Field

[0001] This application belongs to the field of drilling device technology, and particularly relates to a dust removal component, a drilling device including the component, and the application of the device in static blasting technology. Background Technology

[0002] Static blasting, also known as silent fracturing, is a non-explosive construction technique that uses chemical energy to break up rock or concrete. This technique involves filling a borehole with a specific fracturing agent, which generates enormous expansion pressure from the hydration reaction of the agent, causing the medium to slowly fracture from the inside, thus achieving safe and controlled fracturing.

[0003] Correspondingly, compared with traditional explosive blasting operations, static blasting technology has significant advantages such as less vibration, lower noise, and relatively fewer safety hazards. Therefore, static blasting technology has a relatively smaller impact on the surrounding ecological environment and residents' lives, making its practicality and necessity, combined with dust removal capabilities, even more prominent.

[0004] Generally, the dust removal components commonly used in drilling equipment mainly consist of a cover, a suction pipe, and a fan. The drill rod passes through the cover, and the suction pipe is equipped with a filter, thus achieving a combined effect of passive and active dust removal.

[0005] For example, a utility model patent with authorization announcement number CN 212563135 U and authorization announcement date of February 19, 2021, discloses a dust removal hood device for blasting drilling in open-pit coal mines. The structure of this dust removal hood device mainly includes: a dust removal hood, a disc base, a top cover, a drill rod through hole, a mounting groove, a limiting square groove, a sealing slider, wear-resistant rubber, a square slider, a compression spring, a drill rod, and a dust collection pipe.

[0006] The advantages and functions of the dust removal hood device in this utility model patent are as follows: it can not only effectively reduce the radial runout of the drill rod and ensure the stability of the drill rod drilling, but also keep the drill rod and the drill rod through hole of the dust removal hood in an elastic seal to prevent dust from flying out and achieve good dust removal effect.

[0007] However, in actual use, this dust collection hood device still has at least the following shortcomings in practicality, specifically:

[0008] First, the sealing degree between its sealing slider structure and the drill rod is too large, which makes it difficult for the dust collection pipe to fully intake air when suctioning dust, and thus makes it difficult to quickly and thoroughly suck up and remove dust and debris in the dust collector hood.

[0009] Secondly, the shape of its sealing slider structure is a semi-circular ring, and it is a relatively vulnerable part that needs to be replaced regularly. However, it is difficult to remove it easily from the limiting square groove and the drill rod through hole. Before removing it, it needs to be separated from the square slider and the compression spring, which ultimately makes the replacement operation of the sealing slider very complicated. Summary of the Invention

[0010] This application provides a dust removal component, the technical problem to be solved by which the dust removal function of the drilling device has at least the following two functions and advantages: First, a sufficient and appropriate degree of sealing to ensure the effectiveness of the basic passive dust removal function; Second, the sealing structure closest to the drill rod position is a relatively vulnerable part, which has sufficient ease of disassembly and replacement.

[0011] In addition, this application also provides a drilling device including the above-mentioned components, and a method for applying the drilling device in static blasting technology.

[0012] The technical solution adopted by this application to solve the above problems is: a dust removal component, the structure of which includes a dustproof cylinder, an end plate, and a drill rod opening, and further includes a positioning cylinder unit inserted into the drill rod opening and abutting the upper surface of the end plate and used to fit the drill rod, a brush cylinder composite unit screwed onto the inner ring surface of the positioning cylinder unit and whose bristles abut against the drill rod, and a disassembly and positioning dual-purpose composite rod unit disposed on the upper end surface of the positioning cylinder unit and used to rotate the brush cylinder composite unit when disassembling and replacing it, and to block and limit the drilling machine body during drill rod drilling operations.

[0013] A further preferred technical solution is that the positioning cylinder unit includes an annular limiting plate with the disassembly and positioning dual-purpose composite rod unit on one side and the end plate and the brush cylinder composite unit on the other side, and an internally threaded cylinder disposed on the side of the annular limiting plate, inserted into the drill rod opening, and used to install the brush cylinder composite unit.

[0014] A further preferred technical solution is that the brush cylinder composite unit includes an externally threaded cylinder that abuts against the annular limiting plate at one end and is screwed onto the internally threaded cylinder, a brush bristle disposed on the inner annular surface of the externally threaded cylinder and used to abut against the drill rod, and a protruding rod disposed on the other end face of the internally threaded cylinder and used for relative rotation of the internally threaded cylinder and the externally threaded cylinder by means of sleeved onto the pre-removed disassembly and positioning dual-purpose composite rod unit.

[0015] A further preferred technical solution is that the disassembly and positioning dual-purpose composite rod unit includes a fixed stud disposed on the upper surface of the annular limiting plate, and a lifting internal threaded tube screwed onto the fixed stud, which is used to sleeve the disassembly and assembly protrusion rod when disassembling and replacing the brush cylinder composite unit, and to block and limit the main body of the drilling machine when drilling the drill rod.

[0016] A further preferred technical solution includes a dual-purpose dust removal opening provided on the dustproof cylinder body, with a height higher than the lower end face of the positioning cylinder unit, for installing a dust suction pipe or a water inlet pipe. When water enters through the dual-purpose dust removal opening, the positioning cylinder unit is used to block and separate the drill rod and the water flow.

[0017] A further preferred technical solution includes: an annular base block disposed on the dustproof cylinder and used to abut against the perforated substrate, and an opening disposed on the annular base block and used to pass through the substrate protrusion.

[0018] A further preferred technical solution is that: the opening is a threaded hole, the number of the bristle cylinder composite unit is 2-5, one of the bristle cylinder composite units is disposed in the positioning cylinder unit, and each of the remaining bristle cylinder composite units is disposed on the corresponding number of openings.

[0019] A drilling device includes a drill rod and a drilling rig body, and also includes the aforementioned dust removal component, wherein the dust removal component is sleeved on the drill rod.

[0020] A method for static blasting using the aforementioned drilling device, wherein when the drill rod is drilling, the annular base block abuts against the drilling base, the lower end face height of the brush cylinder composite unit is higher than the lower surface height of the annular base block, and the brush cylinder composite unit is to be replaced and used in the opening.

[0021] A further preferred technical solution is that: when the drill rod is performing drilling operations, the annular base block abuts against the base protrusion, the external threaded cylinder or the disassembly and assembly protrusion abuts against the drilling base, and the brush cylinder composite unit levels the annular base block on the drilling base.

[0022] The beneficial effects of this application include at least the following six points.

[0023] First, in this dust removal component, the brush cylinder composite unit is the part that directly contacts the drill rod. The brush bristles fully and appropriately abut against the rotating drill rod, ensuring that the annular gap can not only effectively block the dust that would otherwise float out, but also prevent the drill rod from hitting the hard parts of the dust removal component, and also allow for sufficient air intake, ensuring that the dust and debris accumulated inside the component can be quickly and thoroughly removed.

[0024] Secondly, in this dust removal assembly, the brush cylinder composite unit is a relatively vulnerable part. It is screwed to the positioning cylinder unit, and the positioning cylinder unit is then inserted into the drill rod opening. Therefore, the brush cylinder composite unit has sufficient ease of disassembly and assembly.

[0025] Third, in this dust removal assembly, the detachable and positioning composite rod unit has at least the following two functions:

[0026] A. As the force application position for the rotation and disassembly operation of the bristle cylinder composite unit, the disassembly and assembly operation of the bristle cylinder composite unit is more convenient and faster.

[0027] B. Provide limit indicators for drilling operations of the drill rod to prevent drilling depth from being too large or too small.

[0028] Fourth, in this dust removal assembly, the protruding rod for disassembly and assembly serves at least the following two functions:

[0029] A. Provides a convenient force application position for the rotation operation of the brush barrel composite unit;

[0030] B. Replace the annular base block, or even the externally threaded cylinder, to abut against the drilling base, ensuring that even if the drilling position is relatively close to the base protrusion, the annular base block can still be leveled, so that the dustproof cylinder remains vertical, preventing the drill rod from damaging the dust removal component.

[0031] Fifth, in this dust removal assembly, the positioning cylinder unit also serves at least the following two functions:

[0032] A. As a transitional structure between the brush barrel composite unit and the end plate, the brush barrel composite unit is suitable for various common dust covers (dust cover is dust cover + end plate + drill rod opening). Even if the drill rod opening is an irregular hole or a circular hole with an excessively large diameter, the brush barrel composite unit can be installed stably and used efficiently.

[0033] B. When water enters through the dual-purpose dust removal and cleaning opening, the positioning cylinder unit is used to block and separate the drill rod and the water flow, ensuring that the water-inlet dust removal method can both adsorb dust and prevent the drill rod from being damaged by rapid cooling, ultimately protecting the drill rod.

[0034] Sixth, when this drilling device is used in static blasting technology, even if the drilling base at the drilling position is uneven, or even if the drilling position is close to the base protrusion, it can ensure that the annular base block is horizontal and the dustproof cylinder is vertical, thus preventing the drill rod from damaging the dust removal components and ensuring the safety of dustproof static blasting operations. Attached Figure Description

[0035] Figure 1This is a schematic diagram of the dust removal component in this application.

[0036] Figure 2 This is a schematic diagram illustrating one usage method of the dust removal component in this application.

[0037] Figure 3 This is a schematic diagram of the positional structure of the positioning cylinder unit in this application.

[0038] Figure 4 This is a schematic diagram of one shape of the drill pipe opening in this application.

[0039] Figure 5 This is a schematic diagram of the positional structure of the detachable and positioning composite rod unit in this application.

[0040] Figure 6 This is a schematic diagram illustrating the usage of the lifting internal threaded tube in this application for disassembling and replacing the brush cylinder composite unit.

[0041] Figure 7 This is a schematic diagram of the brush cylinder composite unit in this application in the state of being ready for replacement at the opening.

[0042] Figure 8 This is a schematic diagram illustrating the usage of the externally threaded cylinder in this application, where it abuts against a perforated substrate.

[0043] Figure 9 This is a schematic diagram illustrating the method of using the protruding rod for disassembly and assembly in this application, which abuts against the drilled base.

[0044] Figure 10 This is a schematic diagram illustrating the usage of the lifting internal threaded pipe blocking and limiting drilling rig body in this application.

[0045] The meanings of the markings in the diagram are as follows.

[0046] 11. Dustproof cylinder, 12. End plate, 13. Drill rod opening, 14. Dust suction pipe, 15. Water inlet pipe;

[0047] Positioning cylinder unit 1, brush cylinder composite unit 2, disassembly and positioning dual-purpose composite rod unit 3, dust removal dual-purpose opening 4, circular base block 5, opening 6;

[0048] Circular limiting plate 101, internally threaded cylinder 102;

[0049] External threaded cylinder 201, brush bristles 202, and protruding rod for disassembly and assembly 203;

[0050] Fixed stud 301, lifting internal threaded tube 302, fastening nut 303;

[0051] a) Drill rod; b) Drill rig body;

[0052] Drilled substrate A, substrate protrusion A-1, dust-containing water body B, drilling location C. Detailed Implementation

[0053] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0054] As attached Figure 1 - Appendix Figure 10 As shown, a dust removal assembly includes a dustproof cylinder 11, an end plate 12, and a drill rod opening 13. It also includes a positioning cylinder unit 1 inserted into the drill rod opening 13, abutting the upper surface of the end plate 12, and used to fit the drill rod a; a brush cylinder composite unit 2 screwed onto the inner ring surface of the positioning cylinder unit 1, with bristles abutting the drill rod a; and a dual-purpose (removable and positioned) composite rod unit 3 disposed on the upper end surface of the positioning cylinder unit 1, used to rotate the brush cylinder composite unit 2 during disassembly and replacement, and to block and limit the drilling machine body b during drilling operations of the drill rod a.

[0055] In this embodiment, the main material of the component is engineering plastic. Specifically, the component's structure includes: a dust cover, a positioning cylinder unit 1, a brush cylinder composite unit 2, and a detachable and positioning dual-purpose composite rod unit 3.

[0056] The dustproof cylinder 11, end plate 12, and drill rod opening 13 are combined and can be referred to as a dustproof cover. The positioning cylinder unit 1 and the dustproof cover are inserted together, the brush cylinder composite unit 2 and the positioning cylinder unit 1 are screwed together, and the disassembly and positioning dual-purpose composite rod unit 3 and the positioning cylinder unit 1 are integrally formed, while the disassembly and positioning dual-purpose composite rod unit 3 itself is internally screwed together.

[0057] On the other hand, the reason why this dust removal component has the function and advantage of "sufficient and appropriate sealing to ensure the effectiveness of basic passive dust removal function" mainly includes the following two points.

[0058] First, the brush structure of the brush cylinder composite unit 2 is the only part of the entire component that directly contacts the drill rod a. The brush is deformed by the drill rod a and then abuts against the drill rod a in an elastic manner, ensuring that the annular gap formed between the drill rod a and the brush cylinder composite unit 2 is not prone to dust being blown outward. The brush structure can appropriately trap this part of dust and debris.

[0059] Secondly, the aforementioned brush structure still allows air to enter through the annular gap. Therefore, if an active dust removal structure, i.e., the aforementioned suction pipe 14, is provided on the dustproof cylinder 11, a large amount of air can enter through the annular gap, thereby enabling the continuously generated pulverized debris inside the component to be quickly and thoroughly removed. Otherwise, if the annular gap is excessively sealed, and the dustproof cylinder 11 fully abuts against the perforated base A, the airtightness of the component will be too high, making it difficult to quickly suck out the pulverized debris.

[0060] Furthermore, the reason why this dust removal component has the function and advantage of "the sealing structure closest to the drill pipe position is a relatively vulnerable part, which has sufficient ease of disassembly and replacement" mainly includes the following two points.

[0061] First, the bristle cylinder composite unit 2 is screwed to the positioning cylinder unit 1. One end of the positioning cylinder unit 1 is the installation endpoint positioning end of the bristle cylinder composite unit 2, and the other end allows the bristle cylinder composite unit 2 to be quickly and unobstructedly unscrewed for disassembly and assembly. Therefore, the disassembly and replacement operation has outstanding convenience.

[0062] Secondly, the positioning cylinder unit 1 is only inserted and installed at the drill rod opening 13. Therefore, when the brush cylinder composite unit 2 is disassembled and replaced, the combined structure of the brush cylinder composite unit 2 and the positioning cylinder unit 1 can be removed first, and then the brush cylinder composite unit 2 and the positioning cylinder unit 1 can be separated without lifting or holding the entire dust cover. This can further improve the convenience of the above disassembly and replacement operation.

[0063] Finally, the method of using this dust removal component includes the following steps in sequence.

[0064] First, the dustproof cylinder 11 is vertically fixed on the drilling base A, so that the vertical projection of the center position of the drill rod opening 13 falls on the drilling position C.

[0065] Second, remove the disassembly and positioning composite rod unit 3 from the positioning cylinder unit 1, then use the disassembly and positioning composite rod unit 3 to fully screw the bristle cylinder composite unit 2 into the positioning cylinder unit 1, and finally reinstall the disassembly and positioning composite rod unit 3.

[0066] Third, insert and install the overall structure of the positioning cylinder unit 1 and the brush cylinder composite unit 2 at the drill rod opening 13.

[0067] Fourth, based on multiple parameters such as drilling depth, drill rod a length, and vertical dimensions of the dust removal component, the length of the disassembly and positioning dual-purpose composite rod unit 3 is adjusted to ensure that when the disassembly and positioning dual-purpose composite rod unit 3 abuts against the drilling machine body b, the drill rod a forms a hole of a preset depth on the drilling base A.

[0068] Fifth, if the dust suction pipe 14 is installed, first turn on the exhaust fan on it, then insert the drill rod a into the brush cylinder composite unit 2, then turn on the drill and perform normal drilling operations until the disassembly and positioning dual-purpose composite rod unit 3 abuts against the drill body b, then pull the drill rod a upward, and finally turn off the exhaust fan to complete the entire drilling operation with dust removal function.

[0069] The positioning cylinder unit 1 includes an annular limiting plate 101 with the disassembly and positioning dual-purpose composite rod unit 3 on one side and an annular limiting plate 101 on the other side for abutting the end plate 12 and the brush cylinder composite unit 2, and an internally threaded cylinder 102 disposed on the side of the annular limiting plate 101, inserted into the drill rod opening 13, and used for installing the brush cylinder composite unit 2.

[0070] In this embodiment, the central axes of the annular limiting plate 101 and the internally threaded cylinder 102 coincide, and the inner diameter of the internally threaded cylinder 102 is larger than the inner diameter of the annular limiting plate 101. Therefore, the annular limiting plate 101 can block and position the brush cylinder composite unit 2, ensuring that the brush cylinder composite unit 2 has a unique and correct installation position. For details, please refer to the attached diagram. Figure 3 .

[0071] The annular limiting plate 101 and the internally threaded cylinder 102 are integrally formed, with the annular limiting plate 101 on top and the internally threaded cylinder 102 on the bottom. The internally threaded cylinder 102 can be inserted into and pass through the drill rod opening 13, but the annular limiting plate 101 does not allow it, thus ensuring that the downward insertion of the positioning cylinder unit 1 into the drill rod opening 13 also has a unique correct installation position.

[0072] When the dustproof component is in normal use, the positioning cylinder unit 1 is allowed to undergo a small, indefinite relative rotation with respect to the end plate 12. This rotational displacement does not affect the normal dust removal function or drilling operation.

[0073] The brush cylinder composite unit 2 includes an externally threaded cylinder 201 that abuts against the annular limiting plate 101 and is screwed onto the internally threaded cylinder 102; a brush 202 disposed on the inner annular surface of the externally threaded cylinder 201 and used to abut against the drill rod a; and a protruding rod 203 disposed on the other end face of the internally threaded cylinder 102 and used for relative rotation of the internally threaded cylinder 102 and the externally threaded cylinder 201 by means of sleeved onto the pre-removed disassembly and positioning dual-purpose composite rod unit 3.

[0074] In this embodiment, the external threaded cylinder 201, the bristles 202, and the disassembly / assembly protrusion 203 are integrally formed. The end of the external threaded cylinder 201 without the disassembly / assembly protrusion 203 faces upward, and this end face abuts against the lower surface of the annular limiting plate 101, indicating that the bristle cylinder composite unit 2 has been correctly installed.

[0075] When the bristles 202 are not squeezed by the drill rod a, their overall shape is cylindrical. The inner diameter of the cylindrical structure is smaller than the diameter of the drill rod a and the inner diameter of the annular limiting plate 101, so that when the drilling operation is carried out normally, the drill rod a can only contact the bristles 202.

[0076] Furthermore, after removing the disassembly and positioning dual-purpose composite rod unit 3 and then attaching the disassembly and positioning protrusion 203, the brush tube composite unit 2 can be screwed into the annular limiting plate 101 relatively easily and conveniently. This is one of the functions of the disassembly and positioning protrusion 203.

[0077] The dual-purpose assembly and disassembly positioning composite rod unit 3 includes a fixing stud 301 disposed on the upper surface of the annular limiting plate 101, and a lifting internal threaded tube 302 screwed onto the fixing stud 301, which is used to fit the disassembly and assembly protrusion 203 when disassembling and replacing the brush cylinder composite unit 2, and to block and limit the drilling machine body b when drilling rod a is drilling.

[0078] In this embodiment, the fixing stud 301 and the annular limiting plate 101 are integrally formed. The fixing stud 301 and the lifting internal threaded tube 302 are arranged in pairs, with a quantity of 3-4 pairs.

[0079] During installation, the lifting internal threaded tube 302 and the fixing stud 301 are separated. The lifting internal threaded tube 302 is fitted onto the disassembly and assembly protrusion 203. Applying force to the lifting internal threaded tube 302 allows for indirect and relatively convenient screwing in and unscrewing out the brush cylinder composite unit 2. Therefore, the disassembly and assembly protrusion 203 does not need to be threaded and can be significantly thinner than the lifting internal threaded tube 302.

[0080] When the dust removal assembly is in normal use, the brush cylinder composite unit 2 has been installed, and the lifting internal threaded tube 302 is screwed onto the fixed stud 301 to block and position the drill body b, which has moved downwards, so as to ensure that the drilling depth at the drill rod a is sufficient and appropriate.

[0081] Correspondingly, the assembly and disassembly positioning composite rod unit 3 also includes a fastening nut 303 disposed on the fixing stud 301 for clamping the lifting internal threaded tube 302 that has been vertically adjusted, thereby ensuring that the blocking and limiting height provided at the lifting internal threaded tube 302 is not easily changed spontaneously.

[0082] The structure of the dust removal assembly also includes a dual-purpose dust removal opening 4, which is set on the dustproof cylinder 11 and has a height higher than the lower end face of the positioning cylinder unit 1, and is used to install the suction pipe 14 or the water inlet pipe 15. When water enters through the dual-purpose dust removal opening 4, the positioning cylinder unit 1 is used to block and separate the drill rod a and the water flow.

[0083] In this embodiment, the component, combined with the dual-purpose dust removal opening 4 and the suction pipe 14, or combined with the dual-purpose dust removal opening 4 and the water inlet pipe 15, can upgrade the original passive dust removal effect to an active dust removal effect, which is more in line with the operational requirements of static blasting technology.

[0084] Correspondingly, another function of the positioning cylinder unit 1 is:

[0085] The lower end face height of the internally threaded cylinder 102 is lower than the dust removal dual-purpose opening 4. The internally threaded cylinder 102 prevents relatively cold water from directly impacting the relatively high temperature drill rod a, thereby preventing the drill rod a from being damaged by rapid cooling and ultimately protecting the drill rod a.

[0086] On the other hand, when the four dust-collecting dual-purpose openings are used with the suction pipe 14, the internally threaded cylinder 102 does not affect the normal function of sucking out dust. Regarding the above-mentioned active dust collection function, either the suction or water intake method can be used, and there is no obvious difference in their advantages or disadvantages. Whether the final dust-containing water body B needs to be cleaned is up to the individual.

[0087] The structure of the dust removal assembly also includes an annular base block 5 disposed on the dustproof cylinder 11 and used to abut against the perforated base A, and an opening 6 disposed on the annular base block 5 and used to pass through the base protrusion A-1.

[0088] In this embodiment, another structure of the dust cover includes: an annular base block 5 and an opening 6. The main function of the annular base block 5 is to improve the stability of the dust cover on the perforated base A. The main function of the opening 6 is to avoid the base protrusion A-1. Even if there is a base protrusion A-1 near the perforation position C, the annular base block 5 can be placed horizontally, corresponding to the vertical placement of the dust cover cylinder 11, thus preventing the drill rod a from touching any structure in the component other than the brush bristles 202.

[0089] The opening 6 is a threaded hole. The number of the bristle cylinder composite unit 2 is 2-5. One of the bristle cylinder composite units 2 is disposed in the positioning cylinder unit 1, and each of the remaining bristle cylinder composite units 2 is disposed on the corresponding number of openings 6.

[0090] In this embodiment, the bristle cylinder composite unit 2 is a relatively vulnerable part, so it generally needs to be replaced regularly. For example, one bristle cylinder composite unit 2 should be replaced every 20-50 drilling operations.

[0091] Therefore, the temporary storage of excess brush barrel composite unit 2 at the opening 6 can further improve the practicality of the entire dust removal assembly.

[0092] More importantly, the cross-sectional shape of the external threaded cylinder 201 is annular rather than circular, which still allows the base protrusion A-1 to pass through without affecting the original function of the annular base block 5 at the opening 6 for indirectly leveling the annular base block 5.

[0093] A drilling device includes a drill rod a, a drilling rig body b, and a dust removal component, wherein the dust removal component is sleeved on the drill rod a.

[0094] In this embodiment, when the drilling device is stored and transported, the drill rod a is allowed to touch the dustproof cylinder 11, for example, and the central axis of the drill rod a does not need to coincide with the central axis of the dustproof cylinder 11.

[0095] A method for static blasting using the aforementioned drilling device, wherein when the drill rod a is drilling, the annular base block 5 abuts against the drilling base A, the lower end face height of the brush cylinder composite unit 2 is higher than the lower surface height of the annular base block 5, and the brush cylinder composite unit 2 is to be replaced and used in the opening 6.

[0096] In this embodiment, there is one positioning cylinder unit 1 and five to six bristle cylinder composite units 2, which facilitates the replacement of the bristle cylinder composite units 2.

[0097] On the other hand, when the bristle cylinder composite unit 2 is to be replaced in the opening 6, it can also be fastened to the annular base block 5 by means of a nut, so that the bristle cylinder composite unit 2 is not easy to rotate spontaneously.

[0098] When the drill rod a is drilling, the annular base block 5 abuts against the base protrusion A-1, the external threaded cylinder 201 or the disassembly protrusion 203 abuts against the drilling base A, and the bristle cylinder composite unit 2 levels the annular base block 5 on the drilling base A.

[0099] In this embodiment, when there is a base protrusion A-1 near the drilling position C, the idle bristle cylinder composite unit 2 can be used to level the annular base block 5. Correspondingly, since the overall size of the external threaded cylinder 201 is larger than the disassembly / assembly protrusion 203, the disassembly / assembly protrusion 203 has a stronger ability to avoid the base protrusion A-1. When the flatness of the drilling base A is relatively poor, the disassembly / assembly protrusion 203 is preferentially used to abut against the drilling base A, i.e., attached... Figure 9 Use cases in [the context of the text].

[0100] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A dust removal assembly, which is structurally composed of a dustproof cylinder (11), an end head plate (12), and a drill pipe opening (13), characterized in that: It also includes a positioning cylinder unit (1) that is inserted into the drill rod opening (13) and abuts against the upper surface of the end plate (12) and is used to fit the drill rod (a); a brush cylinder composite unit (2) that is screwed onto the inner ring surface of the positioning cylinder unit (1) and whose bristles are used to abut against the drill rod (a); and a disassembly and positioning dual-purpose composite rod unit (3) that is disposed on the upper end surface of the positioning cylinder unit (1) and is used to rotate the brush cylinder composite unit (2) when disassembling and replacing it, and to block and limit the drilling machine body (b) when the drill rod (a) is drilling.

2. A dust extraction assembly according to claim 1, wherein: The positioning cylinder unit (1) includes an annular limiting plate (101) with the disassembly and positioning dual-purpose composite rod unit (3) on one side and the end plate (12) and the brush cylinder composite unit (2) on the other side, and an internally threaded cylinder (102) disposed on the side of the annular limiting plate (101), inserted into the drill rod opening (13), and used to install the brush cylinder composite unit (2).

3. A dust extraction assembly according to claim 2, wherein: The brush cylinder composite unit (2) includes an external thread cylinder (201) that abuts against the annular limiting plate (101) and is screwed onto the internal thread cylinder (102), a brush (202) disposed on the inner annular surface of the external thread cylinder (201) and used to abut against the drill rod (a), and a disassembly and assembly protrusion (203) disposed on the other end face of the internal thread cylinder (102) and used for relative rotation of the internal thread cylinder (102) and the external thread cylinder (201) by means of sleeve with the disassembly and assembly positioning dual-purpose composite rod unit (3) that has been removed in advance.

4. A dust extraction assembly according to claim 3, wherein: The assembly and disassembly positioning composite rod unit (3) includes a fixed stud (301) disposed on the upper surface of the annular limiting plate (101), and a lifting internal threaded tube (302) screwed onto the fixed stud (301) and used to fit the disassembly and disassembly protrusion (203) when disassembling and replacing the brush cylinder composite unit (2), and used to block and limit the drilling machine body (b) when the drill rod (a) is drilling.

5. A dust extraction assembly according to claim 1, wherein: It also includes a dust removal dual-purpose opening (4) set on the dustproof cylinder (11) and opened at a height higher than the lower end face height of the positioning cylinder unit (1), and used to install a dust suction pipe (14) or a water inlet pipe (15). When water enters the dust removal dual-purpose opening (4), the positioning cylinder unit (1) is used to block and separate the drill rod (a) and the water flow.

6. A dust extraction assembly according to claim 3, wherein: It also includes an annular base block (5) disposed on the dustproof cylinder (11) and used to abut against the perforated base (A), and an opening (6) disposed on the annular base block (5) and used to pass through the base protrusion (A-1).

7. A dust extraction assembly according to claim 6, wherein: The opening (6) is a threaded hole. The number of the bristle cylinder composite unit (2) is 2-5. One of the bristle cylinder composite units (2) is set inside the positioning cylinder unit (1), and each of the remaining bristle cylinder composite units (2) is set on the corresponding number of openings (6).

8. A drilling apparatus, the structure comprising a drill string (a) and a rig body (b), characterised in that: It also includes the dust removal assembly as described in claim 7, wherein the dust removal assembly is sleeved on the drill pipe (a).

9. A method of performing a static blast using the drill assembly of claim 8, characterised in that: When the drill rod (a) is drilling, the annular base block (5) abuts against the drilling base (A). The height of the lower end face of the brush cylinder composite unit (2) is higher than the height of the lower surface of the annular base block (5). The brush cylinder composite unit (2) is to be replaced and used in the opening (6).

10. The method of static blasting according to claim 9, wherein: When the drill rod (a) is drilling, the annular base block (5) abuts against the base protrusion (A-1), the external threaded cylinder (201) or the disassembly protrusion (203) abuts against the drilling base (A), and the brush cylinder composite unit (2) levels the annular base block (5) on the drilling base (A).

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