Mining blasting explosive centering device

Abstract

The invention relates to the technical field of blasting equipment, in particular to a mining blasting explosive centering device which comprises a blasting cartridge of a conical structure and a mounting pipe, the large-diameter end of the blasting cartridge is connected with a guide column, the guide column is correspondingly inserted into the mounting pipe, and a plurality of wedge-shaped grooves are formed in the inner wall of the blasting cartridge in a circle center array mode; a centering assembly is arranged in the blasting cartridge and comprises a plurality of clamping plates which are arranged in an array mode with the blasting cartridge as the circle center, the clamping plates are horizontally arranged, and wedge-shaped blocks are connected to the lower ends of the clamping plates; through the linkage structure of the pull rope, the wedge-shaped block and the clamping plate, radial clamping of the explosive cartridge is achieved, meanwhile, the relative position of the guide column and the mounting pipe is locked through the locking bolt, the tension of the pull rope is fixed, and axial anti-displacement constraint is formed. Even in an inclined blast hole, axial component force generated by the gravity of the cartridge can be resisted, the problem that an existing device is prone to sliding and shifting due to the fact that only radial elastic force of a spring is used is thoroughly solved, and it is guaranteed that the cartridge is located in the center of the blast hole all the time.

Description

Technical Field

[0001] This invention relates to the field of blasting equipment technology, specifically to a device for centering explosives in mining blasting. Background Technology

[0002] During blasting in mining operations, the explosive cartridges need to be kept centered in the borehole. The key is to ensure that the explosive energy of the cartridges acts evenly on the borehole wall, preventing energy from dissipating in one direction due to sticking to the wall. This ensures that the rock fractures evenly from the center outwards, achieving a precise and efficient blasting effect.

[0003] For example, a blasting explosive centering device disclosed in CN222188048U includes a clamping base, three clamping mechanisms are arranged above the clamping base, the clamping mechanism includes a groove formed on the surface of the clamping base, a sliding rod is fixedly connected to the inner wall of the groove, a slider is slidably connected to the outer surface of the sliding rod, the slider is slidably connected to the groove, a connecting rod is fixedly connected to the top surface of the slider, and a clamping plate is fixedly connected to the top end of the connecting rod.

[0004] The following shortcomings exist: This device relies on the radial elastic force of a return spring to hold the explosive cartridge, and no axial anti-displacement structure is designed. When the borehole is inclined, the explosive cartridge will generate an axial component force along the inclination direction due to its own weight. This component force is prone to breaking through the radial constraint force of the spring, causing the explosive cartridge to slide or shift relative to the clamping mechanism, deviating from the center of the borehole. This will disrupt the uniform transmission path of the explosive energy, causing energy to concentrate and dissipate towards the side of the explosive cartridge against the wall, thus leading to problems such as reduced blasting efficiency and poor rock fragmentation quality. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a device for centering explosives in mining blasting operations.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a mining blasting explosive centering device, including a blasting cylinder with a conical structure and an installation pipe, wherein a guide column is connected to the large-diameter end of the blasting cylinder, the guide column is inserted into the installation pipe, and multiple wedge-shaped grooves are arranged in a circular array on the inner wall of the blasting cylinder;

[0007] The blasting tube is equipped with a centering component, which includes multiple clamping plates arranged in an array with the blasting tube as the center. The clamping plates are horizontally arranged, and the lower end of each clamping plate is connected to a wedge block, which is correspondingly arranged in a wedge groove. The two end side walls of each clamping plate are hinged with symmetrically arranged connecting rods. The adjacent connecting rods form a V-shaped structure and are hinged. The open end of the V-shaped structure faces the center of the blasting tube.

[0008] A pull rope is connected to the side wall of the clamping plate facing the opening end of the blasting cylinder, and the pull rope passes around the port of the blasting cylinder and is connected to the side wall of the installation pipe along the outer wall.

[0009] Specifically, the inner wall of the blasting cylinder is provided with multiple travel grooves arranged in a circular array, and the wedge-shaped grooves and travel grooves are arranged at equal intervals.

[0010] Specifically, the angular part of the V-shaped structure corresponds to the stroke groove, and the open end of the V-shaped structure is set towards the center of the blasting tube.

[0011] Specifically, guide blocks are symmetrically provided on the side wall of the guide post, and guide grooves are symmetrically provided on the side wall of the mounting tube, with the guide blocks correspondingly disposed in the guide grooves.

[0012] Specifically, the upper end of the mounting tube is fitted with a locking bolt that is threadedly connected to the mounting tube, and the lower end of the locking bolt is set to abut against the upper end of the guide post.

[0013] Specifically, the pull rope is made of aramid fiber.

[0014] Specifically, the lower end of the clamping plate is provided with a connecting block, and a connecting shaft is connected to the wedge block, and the connecting shaft is fixedly connected to the connecting block.

[0015] The beneficial effects of this invention are:

[0016] 1. Dual anti-deviation mechanism ensures stable centering: This invention utilizes a linkage structure of "pull rope - wedge block - clamping plate" to achieve radial clamping of the explosive cartridge. Simultaneously, locking bolts secure the relative position of the guide post and the mounting tube, fixing the pull rope tension and forming an axial anti-displacement constraint. Even in inclined boreholes, it can resist the axial component force generated by the cartridge's own weight, completely solving the problem of existing devices easily slipping and deviating due to relying solely on the radial elasticity of springs, ensuring the cartridge remains centered in the borehole.

[0017] 2. Adaptable to multiple specifications of explosive cartridges, with strong versatility: The clamping plate of the central component adjusts the spacing by sliding along the wedge groove with the wedge block. Combined with the synchronous deformation design of the V-shaped connecting rod, the clamping diameter can be flexibly changed. It can stably clamp explosive cartridges of different diameters without the need to change the device for specific specifications of explosive cartridges, which greatly improves the applicability of the equipment and reduces the equipment cost in mining.

[0018] 3. Improve blasting efficiency and safety: Through a stable centering effect, the explosive energy can be evenly applied to the borehole wall, avoiding energy dissipation in a single direction, reducing unexploded rock fragments, and improving the quality of rock fragmentation and blasting efficiency; at the same time, the absence of charge deviation can prevent the borehole from collapsing and blocking due to concentrated energy impact on the wall side, reducing safety hazards such as flyrock and ensuring the safety of blasting operations.

[0019] 4. Convenient and efficient operation, reducing labor costs: The device only requires two core operations to complete the clamping and fixing of the explosive cartridge by pushing the blasting cylinder to adjust the position of the guide column and tightening the locking bolts, without the need for complicated debugging procedures; the synchronous movement design of the clamping plate also avoids the trouble of manually adjusting each component, significantly shortening the operation time and reducing the intensity and cost of manual operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the structure of the explosive centering device for mining blasting provided by the present invention;

[0022] Figure 2 The present invention provides a centering device for explosives used in mining. Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 3 A cross-sectional structural schematic diagram of the explosive centering device for mining blasting provided by the present invention;

[0024] Figure 4 A schematic diagram showing the disassembled structure of the mining blasting explosive centering device provided by the present invention;

[0025] Figure 5 A schematic diagram of the centering component structure of the mining blasting explosives centering device provided by the present invention;

[0026] Figure 6 A schematic diagram of the clamping plate connection of the mining blasting explosive centering device provided by the present invention. Figure 1 ;

[0027] Figure 7 A schematic diagram of the clamping plate connection of the mining blasting explosive centering device provided by the present invention. Figure 2 .

[0028] In the diagram: 1. Explosion tube; 11. Guide post; 111. Guide block; 12. Wedge groove; 13. Stroke groove; 2. Centering assembly; 21. Clamping plate; 211. Connecting rod; 22. Wedge block; 221. Connecting shaft; 23. Connecting block; 24. Pull rope; 3. Mounting tube; 31. Guide groove; 32. Locking bolt. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1-7As shown, the mining blasting explosive centering device of the present invention includes a blasting cylinder 1 with a conical structure and an installation pipe 3. The large-diameter end of the blasting cylinder 1 is connected to a guide post 11, which is inserted into the installation pipe 3. Multiple wedge-shaped grooves 12 are arranged in a circular array on the inner wall of the blasting cylinder 1.

[0031] The blasting tube 1 is equipped with a centering component 2. The centering component 2 includes a plurality of clamping plates 21 arranged in an array with the blasting tube 1 as the center. The clamping plates 21 are arranged horizontally. The lower end of the clamping plate 21 is connected to a wedge block 22, and the wedge block 22 is correspondingly arranged in the wedge groove 12. The two side walls of the clamping plate 21 are hinged with symmetrically arranged connecting rods 211. The adjacent connecting rods 211 form a V-shaped structure and are hinged. The open end of the V-shaped structure faces the center of the blasting tube 1.

[0032] A pull rope 24 is connected to the side wall of the clamping plate 21 facing the opening end of the blasting cylinder 1, and the pull rope 24 passes around the port of the blasting cylinder 1 and is connected to the side wall of the installation pipe 3 along the outer wall.

[0033] Specifically, the inner wall of the blasting tube 1 is provided with multiple travel grooves 13 arranged in a circular array, and wedge-shaped grooves 12 and travel grooves 13 are arranged at equal intervals. The corner part of the V-shaped structure corresponds to the travel groove 13, and the open end of the V-shaped structure is set towards the center of the blasting tube 1. When the central component 2 moves forward inside the conical blasting tube 1, the wedge block 22 moves on the wedge groove 12, and the clamping plate 21 moves synchronously with it, thereby reducing the diameter between the clamping plates 21. The horizontal arrangement between the clamping plates 21 allows for the clamping of explosive cartridges of different diameters. Furthermore, the corner part of the V-shaped structure corresponds to the travel groove 13. Because the clamping plates 21 move synchronously, the distance between the corner part of the V-shaped structure and the inner wall of the blasting tube 1 will decrease, and the arrangement of the travel groove 13 meets the requirements of the V-shaped structure deformation.

[0034] Specifically, guide blocks 111 are symmetrically arranged on the side wall of the guide post 11, and guide grooves 31 are symmetrically arranged on the side wall of the mounting tube 3. The guide blocks 111 are correspondingly arranged in the guide grooves 31. The guide post 11 and the mounting tube 3 are telescopically connected. The movement of the guide post 11 synchronously pulls the pull rope 24, which in turn synchronously pulls the clamping plate 21 forward, thereby changing the clamping diameter of the centering component 2.

[0035] Specifically, the upper end of the mounting tube 3 is fitted with a locking bolt 32 that is threadedly connected to the mounting tube 3, and the lower end of the locking bolt 32 is set to abut against the upper end of the guide post 11. The mounting tube 3 is used to be inserted into a blast hole of the same diameter, and the locking bolt 32 is embedded to ensure the stability of the centering component 2 in holding the explosive cartridge.

[0036] Specifically, the pull rope 24 is made of aramid fiber. Its inelastic properties ensure that the force is transmitted directly and without lag when the clamping plate 21 is pulled, while it also has extremely high tensile strength and wear resistance, and can withstand the tension when the clamping plate moves.

[0037] Specifically, the lower end of the clamping plate 21 is provided with a connecting block 23, and a connecting shaft 221 is connected to the wedge block 22, and the connecting shaft 221 is fixedly connected to the connecting block 23.

[0038] When in use, and when the device is not in use, the guide post 11 is inserted into the mounting tube 3, the pull rope 24 is in a slack state, and the clamping plate 21 of the central component 2 maintains a large clamping diameter due to the lack of tension. The operator places the explosive cartridge into the central area formed by the multiple clamping plates 21. At this time, the V-shaped connecting rod 211 is in a naturally extended state, and the wedge block 22 remains in the initial position of the wedge groove 12.

[0039] Then, the staff pushes the blasting cylinder 1, causing the guide column 11 to extend outward along the guide groove 31 of the mounting tube 3 (limited by the guide block 111 to prevent rotation). As the guide column 11 moves, the distance between the blasting cylinder 1 and the mounting tube 3 increases, and the originally slack pull rope 24 is tightened, which in turn generates a pulling force on the clamping plate 21 toward the opening end of the blasting cylinder 1;

[0040] Under the tension of the rope 24, the clamping plate 21 drives the lower wedge block 22 to slide along the wedge groove 12 on the inner wall of the blasting tube 1. Since the wedge groove 12 has an inclined structure, the sliding of the wedge block 22 generates a lateral force towards the center of the blasting tube 1, pushing the clamping plate 21 to move towards the center synchronously. At the same time, the V-shaped connecting rods 211 hinged at both ends of the clamping plate 21 contract and deform as the clamping plate 21 moves, and its angular part slides along the stroke groove 13 (to avoid interference with the inner wall of the blasting tube 1), further ensuring the synchronicity of the movement of multiple clamping plates 21, and finally reducing the clamping diameter and clamping the explosive cartridge, ensuring that the cartridge is located in the center of the device;

[0041] Finally, after the clamping plate 21 clamps the propellant cartridge, the operator tightens the locking bolt 32 on the mounting tube 3, making its lower end tightly contact the upper end of the guide post 11, locking the relative position of the guide post 11 and the mounting tube 3. At this time, the tension of the pull rope 24 remains stable, the wedge block 22 is fixed in position within the wedge groove 12, and the clamping plate 21 continuously applies clamping force to the propellant cartridge. Even in an inclined borehole, the "inelastic pull rope + locking structure" can prevent the propellant cartridge from shifting due to gravity, ultimately achieving stable centering of the propellant cartridge within the borehole.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blasting explosive centering device for mining, comprising a blasting cylinder (1) with a conical structure and an installation pipe (3), wherein the large-diameter end of the blasting cylinder (1) is connected to a guide post (11), the guide post (11) is inserted into the installation pipe (3), and multiple wedge-shaped grooves (12) are arranged in a circular array on the inner wall of the blasting cylinder (1). The blasting tube (1) is provided with a centering component (2). The centering component (2) includes a plurality of clamping plates (21) arranged in an array with the blasting tube (1) as the center. The clamping plates (21) are arranged horizontally. The lower end of the clamping plate (21) is connected to a wedge block (22), and the wedge block (22) is correspondingly arranged in the wedge groove (12). The two side walls of the clamping plate (21) are hinged with symmetrically arranged connecting rods (211). The adjacent connecting rods (211) form a V-shaped structure and are hinged. The open end of the V-shaped structure faces the center of the blasting tube (1). A pull rope (24) is connected to the side wall of the clamping plate (21) facing the opening end of the blasting cylinder (1), and the pull rope (24) passes around the port of the blasting cylinder (1) and is connected to the side wall of the mounting pipe (3) along the outer wall.

2. The blasting explosive centering device for mining as described in claim 1, characterized in that: The inner wall of the blasting cylinder (1) is provided with a plurality of travel grooves (13) arranged in a circular array, and the wedge grooves (12) and travel grooves (13) are arranged at equal intervals.

3. The blasting explosive centering device for mining as described in claim 1, characterized in that: The corner part of the V-shaped structure corresponds to the stroke groove (13), and the opening end of the V-shaped structure is set towards the center of the blasting tube (1).

4. The blasting explosive centering device for mining as described in claim 1, characterized in that: The guide block (111) is symmetrically provided on the side wall of the guide post (11), and the guide groove (31) is symmetrically provided on the side wall of the mounting tube (3). The guide block (111) is correspondingly provided in the guide groove (31).

5. The blasting explosive centering device for mining as described in claim 1, characterized in that: The upper end of the mounting tube (3) is fitted with a locking bolt (32) that is threadedly connected to the mounting tube (3), and the lower end of the locking bolt (32) is set to abut against the upper end of the guide post (11).

6. The blasting explosive centering device for mining as described in claim 1, characterized in that: The pull rope (24) is made of aramid fiber.

7. The blasting explosive centering device for mining as described in claim 1, characterized in that: The lower end of the clamping plate (21) is provided with a connecting block (23), and a connecting shaft (221) is connected to the wedge block (22), and the connecting shaft (221) is fixedly connected to the connecting block (23).

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