Charging device for pre-splitting hole of strip mine

Abstract

The utility model discloses a charging device for a presplitting hole of a strip mine, which relates to the technical field of blasting charging and comprises a mounting cylinder, and a charging component is fixedly mounted at the bottom of the inner wall of the mounting cylinder. According to the charging device for the presplit hole of the strip mine, the explosive can be charged into the charging barrel in the shape of the circular truncated cone through the charging assembly, and the explosive is distributed more evenly through the structural design. Due to the design of a conical funnel of the explosive charging barrel, the explosive can be poured into the explosive charging barrel more easily, and meanwhile, the sealing cover can ensure that the explosive cannot leak in the transportation and storage process. The mounting cylinder can be fixed in presplitting holes with different sizes within a certain range through the fixing assembly, the fixing claws are L-shaped structures and triangular fixing blocks, the contact area with hole walls is increased, meanwhile, the fixing claws made of elastic plastic have certain elasticity and toughness and can adapt to different hole diameters and hole wall shapes, and the fixing effect is good. And the adaptability of the device is further enhanced.

Description

Technical Field

[0001] This utility model relates to the field of explosive charging technology, and in particular to a charging device for pre-splitting holes in open-pit mines. Background Technology

[0002] Pre-splitting blasting in open-pit mines is a controlled blasting technique. Before blasting the main blasting zone, a through-crack of a certain width is blasted along the designed contour line to buffer and reflect the vibration waves from the excavation blast, controlling its destructive impact on the remaining rock mass and achieving a smoother excavation contour. In pre-splitting blasting projects, a combination of radial and axial decoupling charging techniques is frequently used. Radial decoupling is achieved by reducing the diameter of the explosive charge, while axial decoupling is achieved through interval charging. Open-pit mines often have poor control over the charging of pre-splitting blasting charges, resulting in uneven distribution of explosives within the borehole. This leads to excessive fracturing at the bottom of the borehole while pre-splitting is difficult to form in the upper part. Therefore, a pre-splitting borehole charging device that can evenly distribute energy is needed.

[0003] Chinese patent document CN218120775U discloses a pre-splitting hole charging device for deep-hole stepped blasting. It features a base plate at the bottom of a delivery pipe, with a magnetic suction plate on one side. An explosive charge is located at the bottom of the delivery pipe, with a detonating cord extending to the top of the pipe. Airbag plates are evenly arranged from top to bottom within the delivery pipe, with a hollow layer, an explosive layer, and a filling layer between them. A top cover is threaded to the top of the delivery pipe, and a top rod is threaded to the bottom of the top cover. The top cover and delivery pipe deliver the explosive to the bottom of the borehole, preventing soil from mixing into the explosive as it falls, thus improving the purity of the explosive and the blasting effect. The top rod and airbag plates ensure layered delivery of the explosive. This charging device has a detachable structure, allowing for adjustment, and ensures uniform explosive distribution during charging, reducing charging time and providing convenience and speed.

[0004] The existing technology has the following problems:

[0005] In the aforementioned device, although the explosive charge is pushed into the delivery pipe by the push rod, its location at the bottom of the pipe's inner cavity can cause the explosive energy to concentrate excessively at the bottom of the borehole, while being relatively weaker at the top. This results in insufficient rock fragmentation at the top of the borehole, affecting the overall blasting effect. Secondly, in this device, the delivery pipe is directly inserted into the bottom of the pre-splitting hole. The instability of the two conical base plates is insufficient, making them prone to tilting during pipe placement. This design is impractical and can also lead to uneven explosive detonation. Utility Model Content

[0006] This invention provides a charging device for pre-splitting holes in open-pit mines to solve the problems mentioned in the background art.

[0007] To solve the above technical problems, the utility model adopts the technical scheme that is:

[0008] A kind of for strip mine pre-splitting hole charging device, including installation cylinder, the inner wall top of the installation cylinder is connected with top cover by screw thread, the lower end of the installation cylinder is fixedly installed with conical head, the inner wall bottom of the installation cylinder is fixedly installed with charging assembly, the outer wall bottom of the installation cylinder is movably connected with fixed component;

[0009] The charging assembly includes circular mounting plate, the upper end middle part of the mounting plate is equipped with installation slot, the inner wall of the installation slot is connected with charging cylinder by screw thread;

[0010] The fixed component includes moving ring, the inner wall left and right parts of the moving ring are slidably connected with the left and right positions of the outer wall bottom of installation cylinder, the outer wall of the moving ring is fixedly installed with several fixed claws that are annularly distributed.

[0011] Preferably, the inner wall top of the charging cylinder is connected with conical funnel by screw thread, the outer wall top of the funnel is connected with cover by screw thread.

[0012] Preferably, the charging cylinder is circular truncated cone structure.

[0013] Preferably, the right position of the outer wall top of the charging cylinder and the upper end right part of top cover are both equipped with guide hole.

[0014] Preferably, the left and right positions of the outer wall bottom of the installation cylinder are both fixedly installed with guide rail, the inner wall left and right parts of the moving ring are both equipped with the sliding slot of two guide rails matched.

[0015] Preferably, the outer wall bottom of the installation cylinder is fixedly installed with limit ring, the upper end of the moving ring is overlapped with the lower end of limit ring.

[0016] Preferably, four the fixed claws are all L-shaped structure, and the end of four the fixed claws away from the installation cylinder is all fixedly installed with triangular fixed block.

[0017] Preferably, four the fixed claws are all elastic plastic material.

[0018] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0019] 1. The utility model provides a kind of for open pit pre-splitting hole charging device, it can be filled explosive into the charging barrel of circular truncated cone by the cooperation between mounting plate, charging barrel, hopper and cover, this structure design makes explosive distribute more evenly, it is favorable to the stability of blasting effect.The conical hopper design of charging barrel, explosive can be poured into charging barrel more easily, while cover can ensure that explosive does not leak in the process of transportation and storage, improve security.Meanwhile, cover, charging barrel and hopper are all using screw connection mode, it is convenient to quickly disassemble and replace explosive, improve the flexibility of charging.

[0020] 2, the utility model provides a kind of for open pit pre-splitting hole charging device, it can be fixed in different size pre-splitting hole in certain range by the cooperation between moving ring, fixed claw, guide rail, limit ring and fixed block, wherein, fixed claw adopts L-shaped structure and triangular fixed block, increase the contact area with hole wall, improve the stability of device, avoid installation cylinder skew before blasting.Meanwhile, fixed claw of elastic plastic material has certain elasticity and tenacity, can adapt to different aperture and hole wall shape, further enhance the adaptability of device. DRAWINGS

[0021] Figure 1 It is the overall front view structure schematic diagram of the utility model;

[0022] Figure 2 It is the overall cross-sectional structure schematic diagram of the utility model;

[0023] Figure 3 It is the overall explosion structure schematic diagram of the utility model;

[0024] Figure 4 It is the charging assembly structure schematic diagram of the utility model;

[0025] Figure 5 It is the fixed assembly structure schematic diagram of the utility model.

[0026] In the drawing: 1, installation cylinder;2, charging assembly;3, fixed assembly;11, top cover;12, conical head;21, mounting plate;22, mounting groove;23, charging barrel;24, hopper;25, cover;26, guide hole;31, moving ring;32, fixed claw;33, guide rail;34, sliding slot;35, limit ring;36, fixed block. DETAILED DESCRIPTION

[0027] To make the technical means, creative features, achieve purposes and effects of the utility model easy to understand, further illustrate the utility model in the following in combination with specific embodiment.

[0028] For example, Figures 1-5As shown, a pre-split hole charging device for open-pit mine comprises a mounting cylinder 1, a top cover 11 threadedly connected to the top of the inner wall of the mounting cylinder 1, a conical head 12 fixedly installed at the lower end of the mounting cylinder 1, a charging assembly 2 fixedly installed at the bottom of the inner wall of the mounting cylinder 1, and a fixing assembly 3 movably connected to the bottom of the outer wall of the mounting cylinder 1.

[0029] The charging assembly 2 comprises a circular mounting plate 21, an installation groove 22 formed in the middle of the upper end of the mounting plate 21, and a charging cylinder 23 threadedly connected to the inner wall of the installation groove 22.

[0030] The fixing assembly 3 comprises a moving ring 31, the inner wall of which is slidably connected to the left and right positions of the bottom of the outer wall of the mounting cylinder 1, and a plurality of fixing claws 32 fixedly installed on the outer wall of the moving ring 31 in a ring shape.

[0031] The explosive can be loaded into the charging cylinder 23 in the shape of a circular truncated cone through the charging assembly, which makes the explosive more evenly distributed and is conducive to the stability of the blasting effect. The conical funnel design of the charging cylinder 23 makes it easier for the explosive to be poured into the charging cylinder 23, and the cover 25 can ensure that the explosive does not leak during transportation and storage, improving safety. At the same time, the cover 25, the charging cylinder 23 and the funnel 24 are all connected by threads, which facilitates quick disassembly and replacement of the explosive, improving the flexibility of the charging. The fixing assembly 3 can fix the mounting cylinder 1 in pre-split holes of different sizes within a certain range, wherein the L-shaped structure and the triangular fixing block of the fixing claw 32 increase the contact area with the hole wall, improving the stability of the device. At the same time, the fixing claw 32 made of elastic plastic material has a certain elasticity and toughness, which can adapt to different hole diameters and hole wall shapes, further enhancing the adaptability of the device.

[0032] As shown in Figure 3 and Figure 4 , the inner wall of the charging cylinder 23 is threadedly connected to a conical funnel 24 at the top, and the outer wall of the funnel 24 is threadedly connected to a cover 25 at the top.

[0033] The conical funnel design of the charging cylinder 23 makes it easier for the explosive to be poured into the charging cylinder 23, and the cover 25 can ensure that the explosive does not leak during transportation and storage, improving safety. Secondly, the cover 25, the charging cylinder 23 and the funnel 24 are all connected by threads, which facilitates quick disassembly and installation of the explosive, improving the flexibility of the charging. Moreover, the worker can disassemble all the structures inside the mounting cylinder 1 before charging to check the sealing to ensure safety.

[0034] As shown in Figure 4 , the charging cylinder 23 is in the shape of a circular truncated cone.

[0035] Due to the shape characteristics of the circular truncated cone, the explosive will automatically adjust its position when loaded into the charging cylinder 23, achieving a more uniform state. This helps to ensure that the explosive can release energy more uniformly during blasting, thereby improving the stability and consistency of the blasting effect. At the same time, the circular truncated cone structure also helps to reduce friction and resistance during charging, improving charging efficiency.

[0036] As shown in Figure 2 and Figure 3 , the right part of the top of the outer wall of the charging cylinder 23 and the upper end of the right part of the top cover 11 are both provided with a guide hole 26.

[0037] The guide hole 26 facilitates the installation of the detonating cord, further improving the reliability and safety of the blasting. One end of the detonating cord will pass through the guide hole 26 of the charging cylinder 23 and the top cover 11 and extend to the outside of the device. Outside, the detonating cord can be connected with detonators or other initiating elements to form an initiation network.

[0038] As shown in Figure 5 , the outer wall of the mounting cylinder 1 is fixedly installed with guide rails 33 at the left and right positions of the bottom, and the inner wall of the moving ring 31 is provided with sliding grooves 34 matched with the two guide rails 33.

[0039] The two guide rails 33 have a guiding and limiting effect on the movement of the moving ring 31, which can avoid the phenomenon that the moving ring 31 is not stable and rotates when the mounting cylinder 1 enters the pre-split hole.

[0040] As shown in Figure 5 , the outer wall of the mounting cylinder 1 is fixedly installed with a limiting ring 35 at the bottom, and the upper end of the moving ring 31 is overlapped with the lower end of the limiting ring 35.

[0041] When the mounting cylinder 1 is inserted into the pre-split hole, the three fixed claws 32 come into contact with the inner wall of the pre-split hole. During the continuous movement of the mounting cylinder 1, the moving ring 31 will be forced to move upwards, and the limiting effect of the limiting ring 35 can prevent the moving ring 31 from detaching from the mounting cylinder 1.

[0042] As shown in Figure 5 , the four fixed claws 32 are all L-shaped structures, and the ends of the four fixed claws 32 away from the mounting cylinder 1 are all fixedly installed with triangular fixed blocks 36.

[0043] The fixed blocks 36 can reduce the contact area between the fixed claws 32 and the inner wall of the pre-split hole, so that the mounting cylinder 1 can be better inserted into the pre-split hole. At the same time, the triangular structure design of the fixed blocks 36 can help the four fixed claws 32 to better grasp the inner wall of the pre-split hole.

[0044] As shown in Figure 5 , the four fixed claws 32 are all made of elastic plastic material.

[0045] The fixed claw 32 made of elastic plastic material has certain elasticity and toughness, can adapt to different hole diameters and hole wall shapes, and further enhances the adaptability of the device.

[0046] The working principle of the utility model is as follows: in use, the top cover 11 is rotated to separate the top cover 11 from the mounting cylinder 1, the charge cylinder 23 is screwed into the mounting groove 22 first, then the cover 25 is rotated to open, the charge cylinder 23 is filled with explosives, the detonating cord is arranged according to the prior art, one end of the detonating cord passes through the guide hole 26 of the charge cylinder 23 and the top cover 11, and extends to the outside of the device, outside, the detonating cord is connected with the detonator or other initiating elements to form an initiating network. The mounting cylinder 1 is directly inserted into the pre-split hole, the conical head 12 at the bottom of the mounting cylinder 1 is in contact with the bottom of the inner wall of the pre-split hole, the four fixed claws are in contact with the inner wall of the pre-split hole, the moving ring 31 is driven to slide on the two guide rails 33, and is close to the limiting ring 35, the limiting ring 35 can prevent the continuous movement of the moving ring 31, the fixed claws 32 are made of elastic plastic material, can adapt to different hole diameters and hole wall shapes, have strong applicability, and can stably place the mounting cylinder 1 in the pre-split hole, and can avoid the mounting cylinder 1 from being inclined before blasting.

[0047] Before the explosives are filled, the workers can quickly disassemble the top cover 11, the cover 25, the charge cylinder 23 and the funnel 24, and check the sealing of the device.

[0048] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for charging a presplit hole in an open pit mine, comprising a mounting cylinder (1), characterized in that: The inner wall top of the installation cylinder (1) is threadedly connected with a top cover (11), the lower end of the installation cylinder (1) is fixedly connected with a conical head (12), the inner wall bottom of the installation cylinder (1) is fixedly connected with a charge assembly (2), and the outer wall bottom of the installation cylinder (1) is movably connected with a fixing assembly (3). The charge assembly (2) comprises a circular mounting plate (21), the upper end middle portion of the mounting plate (21) is provided with an installation groove (22), and the inner wall of the installation groove (22) is threadedly connected with a charge cylinder (23). The fixing assembly (3) comprises a moving ring (31), the inner wall left and right portions of the moving ring (31) are slidably connected with the left and right positions of the outer wall bottom of the installation cylinder (1), and the outer wall of the moving ring (31) is fixedly connected with a plurality of annularly-distributed fixing claws (32).

2. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The inner wall top of the charge cylinder (23) is threadedly connected with a conical funnel (24), and the outer wall top of the funnel (24) is threadedly connected with a cover (25).

3. The device for presplitting charging of holes in open pit mines according to claim 1, characterized in that: The charge cylinder (23) is a circular truncated cone structure.

4. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The right position of the outer wall top of the charge cylinder (23) and the upper end right portion of the top cover (11) are both provided with a guide rope hole (26).

5. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The left and right positions of the outer wall bottom of the installation cylinder (1) are both fixedly connected with guide rails (33), and the inner wall left and right portions of the moving ring (31) are both provided with sliding grooves (34) matched with the two guide rails (33).

6. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The outer wall bottom of the installation cylinder (1) is fixedly connected with a limiting ring (35), and the upper end of the moving ring (31) is overlapped with the lower end of the limiting ring (35).

7. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The four fixing claws (32) are all L-shaped structures, and the ends, away from the installation cylinder (1), of the four fixing claws (32) are all fixedly connected with triangular fixing blocks (36).

8. The pre-splitting hole charging device for open-pit mine according to claim 1, characterized in that: The four fixing claws (32) are all made of elastic plastic material.

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