A stable fixing device for explosive in blasting hole

Abstract

The utility model relates to a kind of explosive stabilizer in blasting hole, including positioning sleeve and fixed sleeve, the inner wall of positioning sleeve is compatible with the outer wall of fixed sleeve;Two symmetrical distribution clamps are provided in the inside of fixed sleeve, and two guiding bosses corresponding to clamp are provided outside;First cavity is opened in guiding boss, and screw pipe is rotatably installed in first cavity, screw rod is threadedly connected in the inside of screw pipe, one end of screw rod is connected with clamp, and the top of fixed sleeve is provided with driving element for driving screw pipe rotation;Second cavity is opened in the inner wall of positioning sleeve, and several anti-drop blocks are arranged in second cavity and slide along axial direction, one end of anti-drop block extends to the inner wall of positioning sleeve and is provided with inclined surface, and the other end of anti-drop block extends to the outer wall of positioning sleeve and is provided with barb.The stabilizer solves two big problems of explosive axial radial displacement and screw pipe shaking by the two-stage action of "fixed sleeve first clamps medicine, positioning sleeve anchors later".

Description

Technical Field

[0001] This utility model relates to the field of blasting engineering technology, specifically to an explosive stabilizing and fixing device for blasting holes, which is suitable for scenarios such as mining, tunneling, and earth and rock blasting where explosives need to be precisely positioned and firmly fixed. Background Technology

[0002] In blasting operations in mines and tunnels, blasting holes are typically pre-drilled, and explosives are loaded into the holes for detonation. The stability of the explosives directly affects blasting accuracy and construction safety. Currently, the common method of fixing the explosives is to place them directly into a PVC pipe, which is then inserted into the blasting hole. However, the smooth surface of the PVC pipe results in low friction with the hole wall, making it prone to displacement or shaking within the hole. Furthermore, the PVC pipe lacks effective clamping for the explosive itself, allowing it to shift within the pipe, all of which affect blasting accuracy. Therefore, there is an urgent need for a structurally sound and securely fixed explosive fixing device to improve blasting accuracy and construction safety. Utility Model Content

[0003] This invention provides a device for stabilizing and fixing explosives inside blast holes.

[0004] The specific technical solution is as follows: An explosive stabilizing device for blasting holes includes a positioning sleeve and a fixing sleeve. The inner wall of the positioning sleeve is adapted to the outer wall of the fixing sleeve. The fixing sleeve has two symmetrically distributed clamping plates inside and two guide protrusions corresponding to the clamping plates on the outside. A first cavity is formed in the guide protrusions, and a helical tube is rotatably installed in the first cavity. A screw rod is threaded inside the helical tube, and one end of the screw rod is connected to the clamping plate. A driving component for driving the helical tube to rotate is provided at the top of the fixing sleeve. The positioning sleeve has a second cavity on each of its two side walls. Several anti-detachment blocks are slidably arranged in the second cavity along the axial direction. One end of each anti-detachment block extends to the inner wall of the positioning sleeve and is provided with an inclined surface. The other end of each anti-detachment block extends to the outer wall of the positioning sleeve and is provided with barbs.

[0005] Preferably, the inner wall of the positioning sleeve is provided with a guide groove that matches the guide protrusion.

[0006] Preferably, the driving component includes a screw rotatably mounted on the top of a fixed sleeve, a main gear connected to the bottom of the screw, and a driven gear meshing with the main gear connected to the outer surface of the screw tube.

[0007] Preferably, grooves are provided on both sides of the top of the fixing sleeve, and the screw is located in the groove.

[0008] Preferably, a limiting rod parallel to the screw is connected to one side of the lower end of the clamping plate, and the limiting rod slides through into the first cavity.

[0009] Preferably, the inner wall of the clamp is provided with an anti-slip pad, which is a rubber pad.

[0010] Preferably, a spring is sleeved on the outer surface of the anti-detachment block, with one end of the spring near the inner wall of the positioning sleeve abutting against a limiting plate and the other end abutting against the inner wall of the second cavity, and the limiting plate is connected to the outer surface of the anti-detachment block.

[0011] The beneficial effects of this utility model are as follows: This utility model solves the two major problems of axial and radial displacement of explosives and sleeve swaying in one go through a two-stage action of "fixing the explosive with the fixed sleeve first, and then anchoring with the positioning sleeve." The clamping plate, driven by a screw-tube mechanism under the constraint of the limiting rod, firmly holds the explosive. When the fixed sleeve is inserted, it automatically pushes against the anti-detachment block, and the barbs instantly extend and pierce the hole wall, achieving locking between the positioning sleeve and the blasting hole. This fully mechanical structure requires no external power source or adhesive; on-site, only the top screw needs to be rotated to complete the entire process of loading and anchoring, resulting in quick operation and high blasting accuracy. Combined with the use of explosion-proof materials, the sleeve can be disassembled, recycled, and reused. The serialized clamping plates and anti-slip pads are adaptable to different hole diameters and explosive cartridge specifications, significantly reducing engineering costs and possessing good promotional value. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the fixing sleeve of this utility model; Figure 3 This is a schematic diagram of the positioning sleeve of this utility model; Figure 4 This is a cross-sectional structural diagram of the fixing sleeve of this utility model; Figure 5 This is a cross-sectional structural diagram of the positioning sleeve of this utility model; In the diagram: 1-Positioning sleeve; 11-Anti-detachment block; 12-Guide groove; 13-Spring; 14-Limiting plate; 2-Fixing sleeve; 21-Clamping plate; 22-Guide protrusion; 23-Screw tube; 24-Screw; 25-Drive component; 251-Screw; 252-Main gear; 253-Driven gear; 26-Groove; 27-Limiting rod; 28-Anti-slip pad. Detailed Implementation

[0013] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 1-5 As shown, an explosive stabilizing device for blasting holes includes a positioning sleeve 1 and a fixing sleeve 2. The inner wall of the positioning sleeve 1 is adapted to the outer wall of the fixing sleeve 2. The fixing sleeve 2 has two symmetrically distributed clamping plates 21 inside and two guide protrusions 22 corresponding to the clamping plates 21 outside. A first cavity is opened in the guide protrusions 22, and a screw tube 23 is rotatably installed in the first cavity (specifically, it can be achieved by fitting bearings at both ends). A screw rod 24 is threaded inside the screw tube 23. One end of the screw rod 24 is fixedly connected to the clamping plate 21. A driving component 25 for driving the screw tube 23 to rotate is provided at the top of the fixing sleeve 2. A limiting rod 27 parallel to the screw rod 24 is connected to one side of the lower end of the clamping plate 21. The limiting rod 27 slides through into the first cavity and can prevent the clamping plate 21 from rotating, allowing only horizontal movement. When fixing the explosive, insert the explosive into the fixing sleeve 2, and then use a tool to operate the drive component 25 so that the drive component 25 drives the screw tube 23 to rotate. Since the clamping plate 21 is restricted by the limiting rod 27, the screw tube 23 drives the screw 24 to move horizontally. The screw 24 drives the clamping plate 21 to approach the explosive, so that the two clamping plates 21 clamp the explosive, thus fixing the explosive in the fixing sleeve 2.

[0016] Specifically, the driving component 25 includes a screw 251 rotatably mounted on the top of the fixed sleeve 2. A main gear 252 is fixedly connected to the bottom of the screw 251, and a driven gear 253 that meshes with the main gear 252 is connected to the outer surface of the screw tube 23. During operation, the screw 251 is rotated using a tool. The screw 251 drives the main gear 252 to rotate, which in turn drives the driven gear 253 to rotate, which in turn drives the screw tube 23 to rotate, causing the screw 24 to rotate out or in relative to the screw tube 23. At the same time, the two clamping plates 21 move closer or further away from each other synchronously, realizing the rapid clamping or release of the explosive.

[0017] Preferably, grooves 26 are provided on both sides of the top of the fixed sleeve 2, and the screw 251 is located in the grooves 26, which serves to store and protect the screw 251 and prevent the screw 251 from being hit.

[0018] Preferably, the inner wall of the clamping plate 21 is fixedly connected with an anti-slip pad 28, which is a rubber pad. By setting the anti-slip pad 28, the friction of the clamping plate 21 when holding the explosive can be improved, while avoiding damage to the surface of the explosive.

[0019] Specifically, the inner wall of the positioning sleeve 1 is provided with a guide groove 12 that matches the guide protrusion 22. The positioning sleeve 1 and the fixed sleeve 2 achieve directional sliding insertion and anti-rotation through the guide groove 12 and the guide protrusion 22.

[0020] The positioning sleeve 1 has a second cavity on each of its two side walls, and several anti-detachment blocks 11 are slidably arranged axially within the second cavity. One end of the anti-detachment block 11 extends to the inner wall of the positioning sleeve 1 and is provided with a bevel, while the other end of the anti-detachment block 11 extends to the outer wall of the positioning sleeve 1 and is provided with barbs. A spring 13 is fitted on the outer surface of the anti-detachment block 11. One end of the spring 13 near the inner wall of the positioning sleeve 1 abuts against a limiting plate 14, and the other end abuts against the inner wall of the second cavity. The limiting plate 14 is connected to the outer surface of the anti-detachment block 11. In its natural state, the preload of the spring 13 causes the beveled end of the anti-detachment block 11 to extend into the inner cavity of the positioning sleeve 1, while the barbed end is completely retracted into the second cavity, ensuring that the outer wall of the positioning sleeve 1 is smooth and can be smoothly inserted into the blast hole. When the fixing sleeve 2 is inserted into the positioning sleeve 1 along the guide groove 12, its outer wall first pushes the inclined surface of the anti-detachment block 11, causing the anti-detachment block 11 to slide outward against the elastic force of the spring 13, and the barb end then extends out and pierces the soil of the hole wall; after the fixing sleeve 2 is fully in place, the continuous pushing force of the spring 13 keeps the barb engaged with the hole wall, and the positioning sleeve 1 is radially anchored to prevent shaking or rotation.

[0021] Working principle: The positioning sleeve 1 can be pre-positioned and inserted into the blast hole. Under the action of the spring 13, the inclined end of the anti-detachment block 11 extends into the inner cavity of the positioning sleeve 1, and the barbed end retracts into the second cavity. The outer wall of the positioning sleeve 1 remains smooth and can be smoothly lowered into the preset hole.

[0022] When securing the explosive, insert the explosive into the fixing sleeve 2. The screw 24 drives the clamping plates 21 closer to the explosive, clamping them and securing the explosive within the fixing sleeve 2. Then, a tool can be used to rotate the screw 251, causing it to drive the main gear 252, which in turn drives the driven gear 253, which in turn drives the screw tube 23. Because the clamping plates 21 are restricted by the limiting rod 27, the screw tube 23 drives the screw 24 to slide horizontally. Place the explosive charge into the fixed sleeve 2 and use a tool to rotate the screw 251. The screw 251 drives the main gear 252 to rotate, and the driven gear 253, which meshes with the main gear 252, rotates accordingly, thereby driving the two helical tubes 23 to rotate synchronously. Since the limiting rod 27 at the lower end of the clamping plate 21 can only slide horizontally along the first cavity, the screw 24 cannot rotate and can only move linearly relative to the helical tube 23. Therefore, the two clamping plates 21 move towards the center synchronously, and the anti-slip pad 28 is in close contact with the surface of the explosive, completing radial clamping and preventing axial or radial displacement of the explosive in subsequent operations.

[0023] Align the loaded and clamped fixed sleeve 2 with the positioning sleeve 1, and let the guide protrusion 22 slide in along the guide groove 12. During the insertion process, the outer wall of the fixed sleeve 2 first contacts the inclined end of the anti-detachment block 11, and applies an outward pushing force to the inclined surface. The anti-detachment block 11 compresses the spring 13 and slides towards the outer wall of the positioning sleeve 1, and the barbed end gradually extends out of the second cavity. When the fixed sleeve 2 is fully in place, the barbs have penetrated into the soil of the blast hole wall, forming a multi-point friction anchor. At the same time, the restoring force of the spring 13 continues to push the anti-detachment block 11, ensuring that the barbs are tightly engaged with the hole wall, and the positioning sleeve 1 is firmly locked without shaking or rotating.

[0024] Furthermore, if the aforementioned positioning sleeve 1 and fixing sleeve 2 are made of explosion-proof materials, after the blasting is completed, simply rotate the screw 251 in the opposite direction to loosen the explosive residue from the clamp 21; lift the fixing sleeve 2 upwards, and the anti-detachment block 11 will lose its external support force and retract under the action of the spring 13, allowing the positioning sleeve 1 to be easily removed and reused.

[0025] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A device for stabilizing and fixing explosives inside a blasting hole, characterized in that: The device includes a positioning sleeve (1) and a fixing sleeve (2). The inner wall of the positioning sleeve (1) is adapted to the outer wall of the fixing sleeve (2). The fixing sleeve (2) has two symmetrically distributed clamping plates (21) inside and two guide protrusions (22) corresponding to the clamping plates (21) on the outside. The guide protrusions (22) have a first cavity inside, and a screw tube (23) is rotatably installed in the first cavity. The screw tube (23) is threaded with a screw rod (24) inside. One end of the screw rod (24) is connected to the clamping plate (21). The top of the fixing sleeve (2) is provided with a driving component (25) for driving the screw tube (23) to rotate. The positioning sleeve (1) has a second cavity in both sides. Several anti-detachment blocks (11) are slidably arranged in the second cavity along the axial direction. One end of the anti-detachment block (11) extends to the inner wall of the positioning sleeve (1) and is provided with an inclined surface. The other end of the anti-detachment block (11) extends to the outer wall of the positioning sleeve (1) and is provided with barbs.

2. The explosive stabilizing device for blast holes according to claim 1, characterized in that: The inner wall of the positioning sleeve (1) is reserved with a guide groove (12) that is compatible with the guide protrusion (22).

3. The explosive stabilizing device for blast holes according to claim 1, characterized in that: The drive unit (25) includes a screw (251) rotatably mounted on the top of the fixed sleeve (2), the bottom of the screw (251) is connected to a main gear (252), and the outer surface of the screw tube (23) is connected to a driven gear (253) that meshes with the main gear (252).

4. The explosive stabilizing device for blast holes according to claim 3, characterized in that: The top of the fixed sleeve (2) has grooves (26) on both sides, and the screw (251) is located in the grooves (26).

5. The explosive stabilizing device for a blast hole according to claim 1, characterized in that: The lower end of the clamp (21) is connected to a limiting rod (27) parallel to the screw (24), and the limiting rod (27) slides through into the first cavity.

6. A stabilizing device for explosives inside a blasting hole according to any one of claims 1-5, characterized in that: The inner wall of the clamp (21) is provided with an anti-slip pad (28), which is a rubber pad.

7. The explosive stabilizing device for blast holes according to claim 1, characterized in that: A spring (13) is sleeved on the outer surface of the anti-detachment block (11). One end of the spring (13) near the inner wall of the positioning sleeve (1) abuts against the limiting plate (14), and the other end abuts against the inner wall of the second cavity. The limiting plate (14) is connected to the outer surface of the anti-detachment block (11).

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