A shaped charge fixing device for smooth tunnel blasting

Abstract

This utility model provides a shaped charge fixing device for smooth blasting in tunnels, addressing the problems of existing technologies where explosive cartridges lack fixed installation positions and cannot be accurately positioned. It includes: a covering mechanism, multiple fixing and connecting mechanisms, and fixing components. The covering mechanism comprises a first clamping part, a second clamping part, and a sealing part. Both the first and second clamping parts have a starting installation line at the same end. Each fixing and connecting mechanism includes two fixing tubes, a connecting tube, a shaped charge shield, two sets of abutment parts, a first connecting part, and a second connecting part. The shaped charge shield is a hollow cone shape. A partition perpendicular to the central axis is provided inside the fixing tube. The first connecting part connects one fixing tube to the first end of the connecting tube by overlapping the shaped charge shield, and the other fixing tube is connected to the second end of the connecting tube via the second connecting part. The fixing components secure the fixing and connecting mechanism within the first and / or second clamping parts. This device enables rapid and accurate positioning and fixing, improving construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of blasting engineering technology, and in particular relates to a shaped charge fixing device for smooth tunnel blasting. Background Technology

[0002] In tunnel blasting operations, axially spaced explosive charging is a common charging structure. This structure typically arranges explosive cartridges in segments within the blast hole, with a relatively long air gap between each cartridge.

[0003] However, because the smooth blasting boreholes use discontinuous charges, the explosive rolls have no fixed installation position inside the borehole. They are prone to displacement during the process of connecting detonators or filling the borehole mud, resulting in the release of blasting energy being unconcentrated and the utilization rate being low. Furthermore, it is impossible to achieve precise positioning and the interval values ​​are inconsistent during the operation, which affects the quality of smooth blasting. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a shaped charge fixing device for tunnel smooth blasting, which solves the problems of the explosive rolls having no fixed installation position and being unable to be accurately positioned in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a shaped charge fixing device for smooth tunnel blasting, comprising: A covering mechanism, comprising a first clamping part, a second clamping part, and a sealing part, wherein the first clamping part and the second clamping part form a seam when they are joined together and are sealed and connected by the sealing part, and both the first clamping part and the second clamping part are provided with a starting installation line at the same end; Multiple fixed connection mechanisms are provided. Each fixed connection mechanism includes two fixed tubes, a connecting tube, an energy-concentrating cover, two sets of abutting parts, a first connecting part, and a second connecting part. The energy-concentrating cover is hollow cone-shaped. The fixed tubes are provided with a partition perpendicular to the central axis. The first connecting part is used to connect one of the fixed tubes to the first end of the connecting tube by overlapping the energy-concentrating cover. The other fixed tube is connected to the second end of the connecting tube through the second connecting part. The two sets of abutting parts are used to abut and restrict the position of the energy-concentrating cover and the second connecting part when the two fixed tubes are connected to the two ends of the connecting tube. The energy-concentrating shield of each of the fixed connection mechanisms faces the same direction along the length of the first clamping part or the second clamping part; A fastener is used to fix the fixed connection mechanism within the first clamping part and / or the second clamping part.

[0006] Optionally, the first connecting part and the second connecting part have the same structure.

[0007] Optionally, the first connecting part includes a insertion tube, which is coaxially and fixedly connected to the fixed tube, and the outer diameter of the insertion tube is smaller than the inner diameter of the connecting tube; Multiple grooves are spaced apart along the inner wall of the first end of the connecting pipe; Multiple protrusions are provided on the outer wall of the connector, and multiple mounting grooves are provided at intervals. The protrusions are installed in the mounting grooves by elastic elements and initially protrude from the outer wall of the connector.

[0008] Optionally, the elastic element includes a spring, with both ends of the spring fixedly connected to the protrusion and the bottom of the mounting groove, respectively.

[0009] Optionally, the abutting part is an abutting ring, and the abutting ring is coaxially and fixedly fitted with the inner wall of the connecting pipe; And / or, the abutting part includes a plurality of abutting blocks, which are spaced apart along the inner wall of the connecting pipe.

[0010] Optionally, the sealing part is an adhesive tape, which is respectively sealed and attached to the joints on both sides of the energy-concentrating circular tube.

[0011] Optionally, the first clamping part and the second clamping part have the same structure, and both are arc-shaped structures.

[0012] Optionally, the fastener is a double-sided strong adhesive, which has multiple strips, and the multiple strips of double-sided strong adhesive are arranged axially or circumferentially along the inner wall surface of the first clamping part and / or the second clamping part.

[0013] Optionally, it also includes a limiting member, which is disposed on the side opposite to the cone-shaped tip of the energy-concentrating shield, so that when the energy-concentrating shield is connected to the first end of the connecting pipe, one side abuts against the first connecting portion, and the other side is adapted to abut against the abutting portion.

[0014] Optionally, the energy-concentrating shield is made of metal.

[0015] As described above, the shaped charge fixing device for smooth tunnel blasting according to this utility model has at least the following beneficial effects: By drilling a blast hole at the blasting location, one end of the initial explosive is inserted into a fixed tube of the fixed connection mechanism, and a detonator is embedded in the initial explosive. The first connection part connects the fixed tube containing the initial explosive to the first end of the connecting tube by overlapping the shaped charge. The second connection part connects the other fixed tube of the fixed connection mechanism to the second end of the connecting tube, enabling precise assembly and stable and rapid connection of the fixed tube, connecting tube, and shaped charge. The fixed tube containing the initial explosive connected by the first fixed connection mechanism is aligned and fixed to the starting installation line position of the first clamping part or the second clamping part by fasteners. Then, the next roll of explosive is inserted into the other fixed tube of the previous fixed connection mechanism and is precisely fixed to the fixed tube of the shaped charge that overlaps with the next adjacent fixed connection mechanism, so that the explosive can be accurately positioned and not easily loosened, and the explosive installation spacing value can be uniformly arranged. This operation is repeated to connect and arrange explosives in sequence until the designed charge length is reached in the entire first clamping part or the second clamping part. The assembly at the end of the starting installation line provides a clear benchmark, reducing the technical threshold for on-site installation, improving construction efficiency, and ensuring accurate positioning. Then, the second clamping part or the first clamping part is covered to form a joint, and the joint is sealed to form a closed, water-resistant, directional shaped charge fixing device. The shaped charge fixing device is then placed in the borehole, and the detonator lead is led out of the borehole. The borehole opening is then sealed, and the initial explosive is detonated by the detonator to carry out the blast. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional internal structural schematic of this utility model. Figure 3 The diagram shown is a three-dimensional structural schematic of the connecting pipe of this utility model. Figure 4 The diagram shown is a three-dimensional structural schematic of the fixed tube of this utility model; Figure 5 The diagram shown is a three-dimensional structural schematic of the energy-concentrating shield of this utility model. Figure 6 The diagram shows a three-dimensional structural representation of the first connecting part and the energy-concentrating cover of this utility model.

[0017] Component designation explanation Covering mechanism 1, first clamping part 11, second clamping part 12, sealing part 13; Fixed connection mechanism 2, fixed pipe 21, connecting pipe 22, energy-concentrating cover 23, abutting part 24, first connecting part 25, insertion pipe 251, groove 252, protrusion 253, second connecting part 26; Limiting component 3, explosive 4. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0020] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0021] In this embodiment, please refer to Figures 1 to 6 This utility model provides a shaped charge fixing device for smooth tunnel blasting, comprising: The covering mechanism 1 includes a first clamping part 11, a second clamping part 12, and a sealing part 13. When the first clamping part 11 and the second clamping part 12 are mated, a seam is formed and sealed by the sealing part 13. The first clamping part 11 and the second clamping part 12 are provided with a starting installation line at the same end. After the sealing part 13 seals the first clamping part 11 and the second clamping part 12, the bottom end can be reliably sealed with an existing PVC cap to prevent foreign objects from entering and to prevent movement during loading.

[0022] Multiple fixed connection mechanisms 2 are provided. Each fixed connection mechanism 2 includes two fixed pipes 21, a connecting pipe 22, a shaped charge shield 23, two sets of abutment parts 24, a first connecting part 25, and a second connecting part 26. The explosive 4 can be an emulsion explosive 4, and the explosive 4 cartridge is a factory-prefabricated, film-packaged cylindrical emulsion explosive 4 with good water resistance and detonation performance. Each cartridge has a diameter of 32mm, a length of 30cm, and a charge density between 0.95 and 1.3g / cm³. 3Between these, the detonation velocity can reach over 3200 m / s, which can meet the energy requirements of medium-hard rock blasting. The energy-concentrating cover 23 is a hollow cone shape. The fixed tube 21 is provided with a partition perpendicular to the central axis. The first connecting part 25 is used to connect one of the fixed tubes 21 to the first end of the connecting tube 22 by overlapping the energy-concentrating cover 23. The other fixed tube 21 is connected to the second end of the connecting tube 22 through the second connecting part 26. The two sets of abutting parts 24 are used to abut and restrict the position of the energy-concentrating cover 23 and the second connecting part 26 when the two fixed tubes 21 are connected to the two ends of the connecting tube 22. The shaped charge shield 23 of each of the fixed connection mechanisms 2 faces the same direction along the length of the first clamping part 11 or the second clamping part 12; its effective detonation distance is significantly greater than the simple sympathetic detonation distance between the explosives 4.

[0023] A fastener is provided for fixing the fixed connection mechanism 2 within the first clamping part 11 and / or the second clamping part 12.

[0024] By drilling a blasting hole at the blasting location, one end of the initial explosive 4 is inserted into a fixed tube 21 of the fixed connection mechanism 2, and a detonator is embedded in the initial explosive 4. The first connecting part 25 connects the fixed tube 21 containing the initial explosive 4 to the first end of the connecting tube 22 by overlapping the shaped charge shield 23. The second connecting part 26 connects the other fixed tube 21 of the fixed connection mechanism 2 to the second end of the connecting tube 22, enabling precise assembly and stable and rapid connection of the fixed tube 21, the connecting tube 22, and the shaped charge shield. The fixed tube 21 containing the initial explosive 4 connected by the first fixed connection mechanism 2 is aligned and fixed to the first clamping part 11 or the second clamping part 26 by a fastener. The starting installation line of the second clamping part 12 is then positioned, and the next roll of explosive 4 is inserted into another fixing tube 21 of the previous fixing connection mechanism 2. This overlaps with the fixing tube 21 of the shaped charge cover 23 of the next adjacent fixing connection mechanism 2, achieving precise fixing of the explosive 4. This ensures accurate positioning of the explosive 4, preventing loosening and allowing for a uniform arrangement of the explosive 4 installation spacing. This process is repeated, connecting and arranging the explosive 4 sequentially until the designed charge length is reached within the entire first clamping part 11 or second clamping part 12. The initial installation line provides a clear benchmark, reducing the technical threshold for on-site installation, improving construction efficiency, and ensuring precise positioning. Afterwards, the second clamping part 12 or the first clamping part 11 is placed over it to form a joint, which is then sealed by the sealing part 13, creating a closed, water-resistant, directional shaped charge fixing device. This device is then placed in the borehole, and the detonator's lead wire is led out of the borehole. The borehole opening is then sealed, and the initial explosive 4 is detonated by the detonator for blasting.

[0025] In this embodiment, please refer to Figure 2The first connecting part 25 and the second connecting part 26 have the same structure. The first connecting part 25 includes a connecting pipe that is coaxially fixed to one end of the fixed pipe 21. The outer diameter of the connecting pipe is smaller than the inner diameter of the connecting pipe 22. The connecting pipe is provided with an external thread, and the inner wall of the connecting pipe 22 is provided with an internal thread. The fixed pipe 21 and the connecting pipe 22 are connected by the threaded engagement of the external thread and the internal thread.

[0026] In this embodiment, please refer to Figure 3 and Figure 4 The first connecting part 25 includes a plug tube 251, which is coaxially and fixedly connected to the fixed tube 21. The outer diameter of the plug tube 251 is smaller than the inner diameter of the connecting tube 22. Multiple grooves 252 are spaced apart along the inner wall of the first end of the connecting pipe 22; Multiple protrusions 253 are provided, and multiple mounting grooves are provided at intervals on the outer wall surface of the insertion tube 251. The protrusions 253 are installed in the mounting grooves by elastic members and initially protrude from the outer wall surface of the insertion tube 251. The protrusions 253 can be spherical.

[0027] In use, the spherical protrusion 253 on the outer wall of the insertion tube 251 is installed in the mounting groove via an elastic element. Initially, it protrudes from the outer wall. When the insertion tube 251 is inserted into the connecting tube 22, the inner wall of the connecting tube 22 exerts radial pressure on the spherical protrusion 253, forcing the elastic element to compress and the protrusion 253 to retract into the mounting groove. When the insertion tube 251 is inserted to the preset position, the protrusion 253 is precisely aligned with the groove 252 on the inner wall of the connecting tube 22. The elastic element resets, pushing the protrusion 253 out and into the groove 252, achieving rapid locking and fixation of the insertion tube 251 and the connecting tube 22. Multiple grooves 252 and protrusions 253 are spaced circumferentially to further ensure uniform circumferential force after connection and prevent relative rotation. Furthermore, the precise positioning of the energy-concentrating shield 23 is achieved through the cooperation of the abutment part 24, ensuring coaxiality and achieving reliable explosive energy transmission.

[0028] In this embodiment, the elastic element includes a spring, and the two ends of the spring are fixedly connected to the protrusion 253 and the bottom of the mounting groove, respectively.

[0029] In this embodiment, please refer to Figure 2 The abutting part 24 is an abutting ring, and the abutting ring is coaxially and fixedly engaged with the inner wall of the connecting pipe 22; And / or, the abutting part 24 includes a plurality of abutting blocks, which are spaced apart along the inner wall of the connecting pipe 22.

[0030] In this embodiment, please refer to Figure 1The sealing part 13 is an adhesive tape, which is respectively sealed and attached to the joints on both sides of the shaped charge tube. By sealing the joint formed when the first clamping part 11 and the second clamping part 12 are joined by the adhesive tape, the sealing part 13 has a negligible impact on the overall explosion when the explosive 4 detonates.

[0031] In this embodiment, please refer to Figure 1 or Figure 2 The first clamping part 11 and the second clamping part 12 have the same structure and are both arc-shaped. The first clamping part 11 and the second clamping part 12 can be semi-circular tubes with a total length of 3m, an outer diameter of 38mm, a wall thickness of 2mm, and an inner diameter of 36mm. They can be made from recycled materials, such as recycled polyethylene or recycled ABS resin, offering advantages such as low cost, environmental friendliness, and recyclability. The outer diameter of the first clamping part 11 and the second clamping part 12 is smaller than the diameter of the borehole, and the inner diameter is larger than the diameter of four rolls of explosive.

[0032] In this embodiment, the fastener is a double-sided strong adhesive, which has multiple strips. These strips are spaced apart axially or circumferentially along the inner wall of the first clamping part 11 and / or the second clamping part 12. When axially arranged, the strips can be directly spaced from one end of the first clamping part 11 and / or the second clamping part 12 to the other end; when circumferentially arranged, the strips can be directly spaced from one side of the first clamping part 11 and / or the second clamping part 12 to the other side.

[0033] In this embodiment, please refer to Figure 5 or Figure 6 It also includes a limiting member 3, which is disposed on the opposite side of the conical tip of the energy-concentrating shield 23, so that when the energy-concentrating shield 23 is connected to the first end of the connecting pipe 22, one side abuts against the first connecting portion 25, and the other side is adapted to abut against the abutting portion 24. The limiting member 3 can be a limiting ring or a plurality of limiting blocks spaced apart on the opposite side of the conical tip of the energy-concentrating shield 23, wherein it is adapted to abut against the abutting portion 24.

[0034] In this embodiment, please refer to Figure 5 The energy-concentrating shield 23 is made of metal. The energy-concentrating shield 23 can be made of copper, aluminum, iron, copper alloy, aluminum alloy, or iron alloy.

[0035] Working principle: By drilling a blasting hole at the location to be blasted, one end of the initial explosive 4 is inserted into a fixed tube 21 of the fixed connection mechanism 2, and a detonator is embedded in the initial explosive 4. The first connecting part 25 connects the fixed tube 21 containing the initial explosive 4 to the first end of the connecting tube 22 by overlapping the energy-concentrating cover 23. The second connecting part 26 connects the other fixed tube 21 of the fixed connection mechanism 2 to the second end of the connecting tube 22. The fixed tube 21 containing the initial explosive 4 connected by the first fixed connection mechanism 2 is aligned and fixed to the starting installation line position of the first clamping part 11 or the second clamping part 12 by a fastener. Then, the next roll of explosive 4 is inserted into the other fixed tube 21 of the previous fixed connection mechanism 2, and the fixed tube 21 of the energy-concentrating cover 23 of the next adjacent fixed connection mechanism 2 is connected to achieve precise fixation of the explosive 4, so that the explosive 4 can be accurately positioned and not easily loosened, and the installation spacing value of the explosive 4 can be uniformly arranged. This operation is repeated to connect and arrange the explosive 4 in sequence until the designed charge length is reached in the entire first clamping part 11 or the second clamping part 12. Then, the second clamping part 12 or the first clamping part 11 is covered to form a seam, and the seam is sealed by the sealing part 13 to form a closed, water-resistant, directional shaped charge fixing device. Then, the shaped charge fixing device is placed in the borehole, and the detonator lead is led out of the borehole and the borehole opening is sealed. The initial explosive 4 is detonated by the detonator to carry out the blast.

[0036] In summary, this utility model, by drilling a blasting hole at the blasting location, inserting one end of the initial explosive 4 into a fixed tube 21 of the fixed connection mechanism 2, and embedding a detonator in the initial explosive 4, allows for precise assembly and stable and rapid connection of the fixed tube 21, connecting tube 22, and the shaped charge tube by the first connecting part 25, which overlaps with the shaped charge shield 23 and connects to the first end of the connecting tube 22. The second connecting part 26 connects the other fixed tube 21 of the fixed connection mechanism 2 to the second end of the connecting tube 22. Finally, the fixed tube 21 containing the initial explosive 4 connected by the first fixed connection mechanism 2 is aligned and fixed to the first clamping part by a fixing member. The first clamping part 11 or the second clamping part 12 is positioned at the starting installation line. The next roll of explosive 4 is then inserted into another fixing tube 21 of the previous fixing connection mechanism 2, and overlaps with the fixing tube 21 of the shaped charge hood 23 of the next adjacent fixing connection mechanism 2 to achieve precise fixing of the explosive 4. This ensures accurate positioning of the explosive 4, preventing it from loosening, and allows for a uniform arrangement of the explosive 4 installation spacing. This process is repeated, connecting and arranging the explosive 4 sequentially until the designed charge length is reached within the entire first clamping part 11 or the second clamping part 12. The assembly at the end of the starting installation line provides a clear benchmark, reducing the technical threshold for on-site installation, improving construction efficiency, and ensuring precise positioning. Then, the second clamping part 12 or the first clamping part 11 is placed over it to form a joint, which is then sealed by the sealing part 13, forming a closed, water-resistant, directional shaped charge fixing device. This shaped charge fixing device is then placed in the borehole, and the detonator's lead wire is led out of the borehole. The borehole opening is then sealed, and the initial explosive 4 is detonated by the detonator for blasting. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0037] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A shaped charge fixing device for smooth tunnel blasting, characterized in that, include: A covering mechanism, comprising a first clamping part, a second clamping part, and a sealing part, wherein the first clamping part and the second clamping part form a seam when they are joined together and are sealed and connected by the sealing part, and both the first clamping part and the second clamping part are provided with a starting installation line at the same end; Multiple fixed connection mechanisms are provided. Each fixed connection mechanism includes two fixed tubes, a connecting tube, an energy-concentrating cover, two sets of abutting parts, a first connecting part, and a second connecting part. The energy-concentrating cover is hollow cone-shaped. The fixed tubes are provided with a partition perpendicular to the central axis. The first connecting part is used to connect one of the fixed tubes to the first end of the connecting tube by overlapping the energy-concentrating cover. The other fixed tube is connected to the second end of the connecting tube through the second connecting part. The two sets of abutting parts are used to abut and restrict the position of the energy-concentrating cover and the second connecting part when the two fixed tubes are connected to the two ends of the connecting tube. The energy-concentrating shield of each of the fixed connection mechanisms faces the same direction along the length of the first clamping part or the second clamping part; A fastener is used to fix the fixed connection mechanism within the first clamping part and / or the second clamping part.

2. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The first connecting part and the second connecting part have the same structure.

3. The shaped charge fixing device for smooth tunnel blasting according to claim 1 or 2, characterized in that: The first connecting part includes a plug tube, which is coaxially and fixedly connected to the fixed tube, and the outer diameter of the plug tube is smaller than the inner diameter of the connecting tube; Multiple grooves are spaced apart along the inner wall of the first end of the connecting pipe; Multiple protrusions are provided on the outer wall of the connector, and multiple mounting grooves are provided at intervals. The protrusions are installed in the mounting grooves by elastic elements and initially protrude from the outer wall of the connector.

4. The shaped charge fixing device for smooth tunnel blasting according to claim 3, characterized in that: The elastic element includes a spring, with both ends of the spring fixedly connected to the protrusion and the bottom of the mounting groove, respectively.

5. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The abutting part is an abutting ring, and the abutting ring is coaxially and fixedly fitted with the inner wall of the connecting pipe; And / or, the abutting part includes a plurality of abutting blocks, which are spaced apart along the inner wall of the connecting pipe.

6. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The sealing part is an adhesive tape, which seals the joint formed when the first clamping part and the second clamping part are joined together.

7. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The first clamping part and the second clamping part have the same structure, and both are arc-shaped structures.

8. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The fastener is a double-sided strong adhesive, and the double-sided strong adhesive has multiple strips, which are spaced apart axially or circumferentially along the inner wall surface of the first clamping part and / or the second clamping part.

9. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: It also includes a limiting member, which is disposed on the side opposite to the cone-shaped tip of the energy-concentrating cover, so that when the energy-concentrating cover is connected to the first end of the connecting pipe, one side abuts against the first connecting part, and the other side is adapted to abut against the abutting part.

10. The shaped charge fixing device for smooth tunnel blasting according to claim 1, characterized in that: The energy-concentrating shield is made of metal.

Images