A borehole charging device for mining blasting

Abstract

The utility model provides a kind of blast hole charging device for mining blasting, it is related to mining technical field, including charging barrel, the left swing frame and right swing frame are rotatably connected in charging barrel inner tube bottom, the left swing frame and right swing frame are integrally formed at charging barrel center axis and rotatably connected with charging barrel tube bottom center, the inner wall of the left swing frame inner side far from charging barrel center axis is provided with several columns drill bit from top to bottom, the side hole drilled by drill bit in left swing frame and detonator installed in right swing frame form radial fixed point: after detonator is fixed in side hole by double-sided adhesive, even if charging barrel is extracted, because of the hindrance of side hole, the relative position of adjacent two detonators does not change, avoid explosive to supplement in the gap when charging barrel is extracted, to maintain the state that explosive is evenly arranged along blasthole axis according to constant interval, prevent the problem that interval charging becomes continuous charging, ensure that explosion shock wave peak pressure reduces, reduce rock over crushing.

Description

Technical Field

[0001] This utility model relates to the field of mining technology, and in particular to a blast hole charging device for mining blasting. Background Technology

[0002] In the mining process, the main reason for drilling holes and placing explosives in them for blasting is that the ore and rock are usually hard, and direct crushing by manual or mechanical means is inefficient and costly. The explosion of explosives generates high-temperature and high-pressure gas and shock waves, which break the rock and efficiently extract the ore.

[0003] Therefore, in the existing mining blasting charging device, with the publication number CN221571265U, the explosive is loaded into the charging tube and inserted into the blast hole. The auger is rotated to slowly advance the explosive along the axial direction of the charging tube. Finally, the explosive leaks out into the blast hole through the distribution holes. Since the distribution holes are evenly arrayed along the axial direction of the charging tube, the explosive can be evenly distributed in the blast hole at constant intervals along the blast hole axis, so that the explosive detonates in the expected manner.

[0004] The core objective of this device is to achieve "uniformly distributed explosives along the borehole axis at constant intervals" to reduce the peak pressure of the blast shock wave and minimize excessive rock fragmentation through interval charging. However, during use, the charging cartridge needs to be inserted into the borehole, and after the explosives are distributed, it needs to be withdrawn along the borehole axis. The gap left after withdrawal, located between two adjacent explosive sections or at the end of the borehole, can cause the original uniform intervals to be compressed or disappear if the explosives slide to fill the gaps. This turns "interval charging" into "continuous charging," violating the original design intent. Not only will it fail to achieve the expected blasting protection effect, but it may also cause excessive rock fragmentation around the borehole due to the concentration of shock waves, increasing the difficulty of subsequent mining cleanup. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art by proposing a blast hole charging device for mining blasting.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a blasting hole charging device for mining blasting, comprising a charging cylinder, wherein a left swing frame and a right swing frame are rotatably connected to the bottom of the charging cylinder, the left swing frame and the right swing frame are integrally formed at the central axis of the charging cylinder and rotatably connected to the center of the bottom of the charging cylinder, and a plurality of rows of drill bits are arranged from top to bottom on the inner wall of the left swing frame away from the central axis of the charging cylinder, wherein the length direction of each row of drill bits is arranged along the radial direction of the charging cylinder and the drill bits face away from the charging cylinder. The cartridge is installed through the side wall of the left swing frame. The inner wall of the right swing frame, away from the central axis of the cartridge and at the same height as each row of drill bits in the left swing frame, is equipped with a detonator tube for installing detonators. The cartridge wall has a through groove along the central axis for aligning with the left and right swing frames. An electric push rod is fixedly installed on the side of the cartridge facing the through groove and at the same height as each row of drill bits in the left swing frame. The telescopic end of the electric push rod is used to push the drill bits and detonator tubes at the same height.

[0007] Preferably, the drill bit surface is provided with a keyway and a worm gear ring that is rotatably connected to the left swing frame is fitted on the drill bit surface, and the inner wall of the worm gear ring extends inward and is inserted into the keyway.

[0008] Preferably, a worm gear is rotatably connected inside the left swing frame, the worm gear is arranged parallel to the central axis of the charge cartridge and is meshed with a worm wheel ring inside the left swing frame.

[0009] Preferably, the drill bit handle and the bottom of the detonator cylinder are rotatably connected to a connecting seat, and the inner walls of the left and right swing frames are each fixedly installed with two guide rods that extend along the radius of the charge cartridge and pass through both ends of the connecting seat.

[0010] Preferably, in the left and right swing frames, elastic ropes extend from both ends of each connecting seat towards the central axis of the cartridge and pass through the extended ends. One end of the elastic rope is connected to the connecting seat, and the other end of the elastic rope is connected to the left and right swing frames.

[0011] Preferably, the top of the connection between the left and right swing frames is rotatably connected to the center of the tube opening of the charging cylinder, and a turntable is fixedly installed at the connection. The turntable has a slot on its side located directly above the left and right swing frames.

[0012] Preferably, the inner wall of the charging cylinder extends inward and is rotatably connected to the left swing frame, and an elastic hook for engaging with the groove is fixedly installed at the extension of the charging cylinder opening.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the side hole drilled by the drill bit in the left swing frame and the detonator installed in the right swing frame form a radial fixing point: after the detonator is fixed in the side hole with double-sided tape, even if the charging cartridge is pulled out, the relative position of the two adjacent detonators will not change due to the obstruction of the side hole, thus avoiding the explosive filling the gap when the charging cartridge is pulled out, thereby maintaining the state of the explosive evenly arranged at constant intervals along the axis of the blast hole, eliminating the problem of intermittent charging becoming continuous charging, ensuring that the peak pressure of the explosion shock wave is reduced, and reducing the excessive crushing of rocks.

[0015] 2. In this utility model, the slot of the turntable cooperates with the elastic hook of the charging tube opening to achieve precise fixation after the left and right swing frames are swapped. This ensures that the left swing frame is always aligned with the through slot when drilling side holes and the right swing frame is always aligned with the through slot when installing detonators, avoiding the problem of side hole position deviation and detonator mismatch due to swing frame offset. In addition, the cooperation between the connecting seat and the guide rod further ensures the stability of the movement trajectory of the drill bit and detonator tube, and improves the overall operating accuracy of the device. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a blast hole charging device for mining blasting;

[0017] Figure 2 This utility model proposes a borehole charging device for mining blasting. Figure 1 A schematic diagram of the cross-sectional structure;

[0018] Figure 3 This utility model proposes a borehole charging device for mining blasting. Figure 2 A schematic diagram of the rear view structure;

[0019] Figure 4 for Figure 2 A top-down sectional view of the structure.

[0020] Legend: 1. Charge cartridge; 2. Turntable; 3. Elastic hook; 4. Slot; 5. Left swing frame; 6. Right swing frame; 7. Through slot; 8. Drill bit; 9. Detonator; 10. Electric push rod; 11. Worm gear; 12. Worm gear ring; 13. Keyway; 14. Connecting seat; 15. Guide rod; 16. Elastic rope. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] like Figures 1-4 As shown, a blasting hole charging device for mining blasting includes a charging cylinder 1. A left swing frame 5 and a right swing frame 6 are rotatably connected to the bottom of the charging cylinder 1. The left swing frame 5 and right swing frame 6 are integrally formed at the central axis of the charging cylinder 1 and rotatably connected to the center of the bottom of the charging cylinder 1, thus facilitating the rotation and repositioning of the left swing frame 5 and right swing frame 6. Several rows of drill bits 8 are arranged from top to bottom on the inner wall of the left swing frame 5 on the side away from the central axis of the charging cylinder 1. The length direction of each row of drill bits 8 is along the charging hole. The cylinder 1 is arranged radially, and the drill bit 8 faces away from the charging cylinder 1 and penetrates the side wall of the left swing frame 5. The right swing frame 6 is located on the inner wall of the side away from the central axis of the charging cylinder 1 and within the left swing frame 5. Each row of drill bits 8 is equipped with a detonator cylinder 9 for installing detonators at the same height. The cylinder wall of the charging cylinder 1 has a through groove 7 along the central axis for alignment with the left swing frame 5 and the right swing frame 6. When the left swing frame 5 faces the through groove 7, the rotating drill bit 8 is pushed through by an external force. The through slot 7 extends out of the charging cartridge 1, and several side holes are drilled evenly distributed from top to bottom on the inner wall of the drilled hole. After the drill bit 8 is retracted, the positions of the left swing frame 5 and the right swing frame 6 are switched to align the right swing frame 6 with the through slot 7. Then, external thrust is applied to make the detonator tube 9 enter the side hole drilled at the corresponding height. The detonator stored in the detonator tube 9 is placed into the corresponding side hole. In actual use, in order to prevent the detonator tube 9 from being taken out along with the detonator inside when it is pulled out of the side hole, double-sided tape can be pasted on the end of the detonator and pasted into the side hole using double-sided tape. Electric push rods 10 are fixedly installed at the same height position of each row of drill bits 8 in the left swing frame 5 on the side of the charging cartridge 1 facing the through slot 7. The telescopic end of the electric push rod 10 is used to push the drill bits 8 and detonator tubes 9 set at the same height. The extension of the electric push rod 10 makes the drill bits 8 or detonator tubes 9 at the same height in the left swing frame 5 or right swing frame 6 aligned with the through slot 7 extend out of the charging cartridge 1.

[0024] The drill bit 8 has a keyway 13 on its surface and a worm gear ring 12 that is rotatably connected to the left swing frame 5. The inner wall of the worm gear ring 12 extends inward and is inserted into the keyway 13. A worm 11 is rotatably connected inside the left swing frame 5. The worm 11 is parallel to the central axis of the cartridge 1 and meshes with the worm gear ring 12 inside the left swing frame 5. In actual use, the worm 11 is driven to rotate by installing a motor on the top edge of the left swing frame 5, which in turn drives the worm gear ring 12 to rotate. The drill bit 8 is rotated by using the key connection between the worm gear ring 12 and the drill bit 8. Conversely, using the key connection between the drill bit 8 and the worm gear ring 12 will not affect the sliding of the drill bit 8 relative to the worm gear ring 12.

[0025] The drill bit 8 and the detonator tube 9 are both rotatably connected to a connecting seat 14. Two guide rods 15 are fixedly installed on the inner walls of the left and right swing frames 5 and 6, extending radially along the charge cartridge 1 and passing through both ends of the connecting seat 14. Elastic ropes 16 extend from both ends of each connecting seat 14 within the left and right swing frames 5 and 6 towards the central axis of the charge cartridge 1, with each extension end passing through an elastic rope 16. One end of the elastic rope 16 is connected to the connecting seat 14, and the other end is connected to the left and right swing frames 5 and 6. The drill bit is connected to the connecting seat 14 by applying a thrust. The movement of drill bit 8 or detonator 9 is not affected by the rotational connection between the connecting seat 14 and the drill bit 8. Moreover, when the connecting seat 14 extends out of the charging cartridge 1, the guide rod 15 ensures that the connecting seat 14 can only move along the radius of the charging cartridge 1. When it extends out of the charging cartridge 1, the elastic rope 16 can be pulled to stretch elastically. Therefore, when the thrust on the surface of the connecting seat 14 is removed, it is elastically contracted and reset by the elastic rope 16, which can pull the connecting seat 14 back into the charging cartridge 1, thereby enabling the drill bit 8 or detonator 9 connected to it to retract into the charging cartridge 1.

[0026] The top of the connection between the left swing frame 5 and the right swing frame 6 is rotatably connected to the center of the opening of the cartridge 1, and a turntable 2 is fixedly installed at the connection. The side of the turntable 2 is provided with a slot 4 directly above the left swing frame 5 and the right swing frame 6. The inner wall of the opening of the cartridge 1 extends inward and is rotatably connected to the left swing frame 5. An elastic hook 3 for engaging with the slot is fixedly installed at the extension of the opening of the cartridge 1. When the left swing frame 5 and the right swing frame 6 rotate and change positions, the corresponding turntable 2 will rotate, so that the two slots 4 can be alternately aligned with the elastic hook 3. Therefore, by aligning the elastic hook 3 with the slot 4, the position of the turntable 2 can be fixed, thereby fixing the position of the left swing frame 5. That is, when the elastic hook 3 engages with the slot 4 above the left swing frame 5, the left swing frame 5 remains facing the through slot 7. When the elastic hook 3 engages with the slot 4 above the right swing frame 6, the right swing frame 6 remains facing the through slot 7.

[0027] The method of using this utility model is as follows: In the initial state of the device, the elastic hook 3 engages with the slot 4 of the turntable 2 above the left swing frame 5, and the left swing frame 5 remains fixed facing the through groove 7 of the cylinder wall of the charging cartridge 1. The motor installed at the top of the left swing frame 5 is started, and the motor drives the worm gear 11, which is parallel to the central axis of the charging cartridge 1, to rotate. The worm gear 11 engages and drives the worm wheel ring 12 inside the left swing frame 5 to rotate. Because the inner wall of the worm wheel ring 12 is inserted into the keyway 13 on the surface of the drill bit 8, the rotation of the worm wheel ring 12 synchronously drives the drill bit 8 to rotate. Then, the electric push rod 10, which is at the same height as the drill bit 8 in the left swing frame 5, is activated inside the charge cartridge 1. The telescopic end of the electric push rod 10 applies a thrust to the connecting seat 14 of the drill bit 8. The connecting seat 14 moves along the guide rod 15 on the inner wall of the left swing frame 5, causing the drill bit 8 to pass through the through slot 7 and extend out of the charge cartridge 1. During this process, the connecting seat 14 pulls the elastic rope 16 to extend elastically, and at the same time, the drill bit 8 drills several side holes evenly distributed from top to bottom on the inner wall of the blast hole while rotating. After drilling the side holes, the motor is turned off and the electric push rod 10 is retracted. The connecting seat 14 returns to its original position along the guide rod 15 under the elastic contraction force of the elastic rope 16, and the drill bit 8 is retracted into the charge cartridge 1 along with the connecting seat 14.

[0028] After drilling the side hole, the turntable 2 is rotated to rotate the left swing frame 5 and the right swing frame 6 around the central axis of the charge cartridge 1 and exchange positions. During the rotation of the turntable 2, the elastic hook 3, which was originally engaged with the slot 4 of the left swing frame 5, disengages. When the right swing frame 6 rotates to face the through groove 7, the slot 4 directly above the right swing frame 6 on the turntable 2 aligns with the elastic hook 3, and the elastic hook 3 engages with the slot 4, thus fixing the right swing frame 6 in place. At this time, the electric push rod 10, which is at the same height as the detonator cylinder 9 of the right swing frame 6, is activated. The electric push rod 10 applies a pushing force to the connecting seat 14 of the detonator cylinder 9. The connecting seat 14 moves along the guide rod 15 on the inner wall of the right swing frame 6, causing the detonator cylinder 9 to pass through the through groove 7 and extend into the side hole at the corresponding height. Because double-sided tape is attached to the end of the detonator, after the detonator is pushed from the detonator cylinder 9 into the side hole, the double-sided tape can fix the detonator in the side hole. Then the electric push rod 10 is retracted, the connecting seat 14 is reset under the action of the elastic rope 16, and the detonator tube 9 is retracted into the charging tube 1 along with the connecting seat 14, completing a round of coordinated operation between the left swing frame 5 and the right swing frame 6.

[0029] The wiring diagrams of the motor and electric actuator 10 in this utility model are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the motor and electric actuator 10 will not be explained in detail.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A blast hole charging device for mining blasting, comprising a charging cylinder (1), characterized in that: The bottom of the inner cylinder of the charge cartridge (1) is rotatably connected to a left swing frame (5) and a right swing frame (6). The left swing frame (5) and the right swing frame (6) are integrally formed at the central axis of the charge cartridge (1) and rotatably connected to the center of the bottom of the charge cartridge (1). The inner wall of the left swing frame (5) away from the central axis of the charge cartridge (1) is provided with several rows of drill bits (8) from top to bottom. The length direction of each row of drill bits (8) is arranged along the radius direction of the charge cartridge (1), and the drill bit of the drill bit (8) faces away from the charge cartridge (1) and penetrates the side wall of the left swing frame (5). The right swing frame (6) is located away from the charge cartridge. (1) A detonator tube (9) for installing detonators is installed through the inner wall of the central axis and at the same height as each row of drill bits (8) in the left swing frame (5). The wall of the charging tube (1) is provided with a through groove (7) for aligning with the left swing frame (5) and the right swing frame (6) along the central axis. An electric push rod (10) is fixedly installed on the side of the charging tube (1) facing the through groove (7) and at the same height as each row of drill bits (8) in the left swing frame (5). The telescopic end of the electric push rod (10) is used to push the drill bits (8) and the detonator tube (9) set at the same height.

2. The blast hole charging device for mining blasting according to claim 1, characterized in that: The drill bit (8) has a keyway (13) on its surface and a worm gear ring (12) that is rotatably connected to the left swing frame (5) is fitted on the surface of the drill bit (8). The inner wall of the worm gear ring (12) extends inward and is inserted into the keyway (13).

3. The blast hole charging device for mining blasting according to claim 2, characterized in that: A worm gear (11) is rotatably connected inside the left swing frame (5). The worm gear (11) is parallel to the central axis of the charging cylinder (1) and is meshed with the worm wheel ring (12) inside the left swing frame (5).

4. The blast hole charging device for mining blasting according to claim 1, characterized in that: The drill bit (8) handle and the bottom of the outer cylinder of the detonator (9) are rotatably connected to a connecting seat (14). The inner walls of the left swing frame (5) and the right swing frame (6) are fixedly installed with two guide rods (15) that extend along the radius of the charge cartridge (1) and pass through both ends of the connecting seat (14).

5. The blast hole charging device for mining blasting according to claim 4, characterized in that: The left swing frame (5) and the right swing frame (6) are located at both ends of each connecting seat (14) and extend towards the central axis of the charging cartridge (1), with an elastic rope (16) passing through the extended end. One end of the elastic rope (16) is connected to the connecting seat (14), and the other end of the elastic rope (16) is connected to the left swing frame (5) and the right swing frame (6).

6. The blast hole charging device for mining blasting according to claim 1, characterized in that: The top of the connection between the left swing frame (5) and the right swing frame (6) is rotatably connected to the center of the opening of the medicine cylinder (1), and a turntable (2) is fixedly installed at the connection. The turntable (2) has a slot (4) on its side located directly above the left swing frame (5) and the right swing frame (6).

7. The blast hole charging device for mining blasting according to claim 6, characterized in that: The inner wall of the charging cylinder (1) extends inward and is rotatably connected to the left swing frame (5), and an elastic hook (3) for engaging with the groove is fixedly installed at the extension of the charging cylinder (1).

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