A double-layered shaped charge device

Abstract

The utility model relates to a double -layer blasting shaped charge liner device relates to the field of tunnel engineering blasting, including the shaped charge liner body (1), it is the integrated elastic structure, the middle part opposite both sides of shaped charge liner body (1) is shaped energy part, and one side of two shaped energy parts is integrally connected, and the other side is connected through the snap -fit structure (4) and is inserted and is connected, and the tubular structure of the inside hollow is enclosed, shaped energy part includes two in proper order link's shaped energy groove (3), the cross section shape of shaped energy groove (3) is the V -shaped that opens outward, and shaped energy part still sets up a plurality of shaped energy holes (2) at shaped energy groove (3). The utility model discloses the shaped charge liner body elasticity integration and the setting of snap -fit structure, not only simplify explosive loading but also reduce the production difficulty, the shaped energy groove of two -layer in proper order link can form bidirectional shaped energy cutting, and its shaped energy groove cutting seam effect is more remarkable, and the reinforced guidance of shaped energy hole to shaped energy flow, can accurate control rock mass crack direction, effectively avoid the drum belly phenomenon and the problem of overbreak.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering blasting, specifically a double-layer blasting energy-concentrating tube device. Background Technology

[0002] As a key technology in directional blasting, shaped charge blasting works by guiding a shaped charge flow through the rock mass to create initial fissures using a special structure of a shaped charge tube. Then, the generated gas is used to propel the fissures to expand, thereby achieving directional cutting of the rock mass. This improves the blasting profile, reduces the amount of explosive in the blast holes, and decreases the number of cut holes, which is of great significance for protecting the integrity of the surrounding rock of the tunnel and improving construction efficiency.

[0003] However, existing shaped charge tubes still have many shortcomings and cannot meet the construction needs of complex tunnel projects: existing shaped charge tubes are mostly modular structures, which are difficult to assemble, have a complicated manufacturing process, and have poor overall structural stability, making them easy to be damaged during transportation or installation. In addition, complex assembly and disassembly steps are required before and after the addition and removal of explosives, which seriously affects construction efficiency; the shaped charge structure is simple and can only cut in one direction, resulting in weak cutting effect. After blasting, problems such as bulging, over-excavation and under-excavation are likely to occur. The direction of rock mass fissures is difficult to control, and the volume of broken rock and the length of the cracks are insufficient, which not only reduces the quality of tunnel outline formation, but may also increase the cost of subsequent support due to excessive damage to the surrounding rock. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a double-layer explosive energy-concentrating tube device.

[0005] The technical solution of this utility model is as follows: A double-layer explosive shaped charge tube device includes an shaped charge tube body, which is an integral elastic structure. The two sides of the middle part of the shaped charge tube body are shaped charge sections. One side of the two shaped charge sections is integrally connected, and the other side is connected by a snap-fit ​​structure, forming a hollow tubular structure. The shaped charge section includes two shaped charge grooves connected in sequence. The cross-sectional shape of the shaped charge grooves is a V-shape with the opening facing outwards. The shaped charge section also has several shaped charge holes opened at the shaped charge grooves.

[0006] As one implementation method, the fastening structure includes an arc-shaped socket and an arc-shaped plug arranged opposite each other, with the arc-shaped plug inserted into the arc-shaped socket.

[0007] Furthermore, the opening of the arc-shaped socket has a first arc segment and a second arc segment set inside and outside on both sides, and the length of the second arc segment is greater than the length of the first arc segment.

[0008] Preferably, the insertion end of the arc-shaped plug has an arc-shaped structure that abuts against the bottom of the arc-shaped socket.

[0009] In one preferred implementation, several energy-concentrating holes are equidistantly distributed along the length of the energy-concentrating groove.

[0010] More preferably, the positions of the two energy-concentrating slots of the two energy-concentrating parts correspond one-to-one, and the axis of the energy-concentrating hole on the corresponding two energy-concentrating slots is perpendicular to the energy-concentrating slot.

[0011] As one implementation method, the V-shaped opening angle of the energy-concentrating trough is 40°-50°, and preferably 45°.

[0012] As described above, in a double-layer explosive shaped charge tube device, the inner side of the shaped charge tube body is also provided with a filler buffer cavity opposite to the location of the fastening structure.

[0013] Preferably, the cross-section of the packing buffer cavity is a concave crescent shape.

[0014] The double-layer explosive condensing tube device described above has an condensing tube body made of PVC material.

[0015] The beneficial effects of this utility model are: The shaped charge tube body of this utility model is a flexible integrated structure that does not require assembly, greatly reducing the manufacturing difficulty. In addition, the snap-fit ​​structure simplifies the operation of adding and removing explosives, significantly improving the efficiency of blasting operations and solving the problem of cumbersome loading of explosives in existing split shaped charge tubes. (2) The double-layered energy-concentrating grooves can form bidirectional energy-concentrating cutting, which is more effective than the single-layered energy-concentrating groove cutting effect. Combined with the energy-concentrating holes to enhance the guidance of energy flow, it can accurately control the direction of rock mass crack opening, effectively avoid the bulging phenomenon and over- or under-excavation problems, and significantly improve the quality of tunnel outline forming. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 for Figure 1 The front view; Figure 4 This is a schematic diagram of the energy focusing holes in the two energy focusing sections of this embodiment; Figure 5 This is a schematic diagram of the fastening structure in this embodiment; The components represented by the various reference numerals in the diagram are: 1. Energy-concentrating tube body; 2. Energy-concentrating hole; 3. Energy-concentrating groove; 4. Fastening structure; 41. First arc-shaped section; 42. Second arc-shaped section; 43. Arc-shaped plug; 5. Filler buffer cavity. Detailed Implementation

[0017] Combination Figure 1 and Figure 2 This embodiment provides a double-layer explosive shaped charge tube device, including an shaped charge tube body 1. The shaped charge tube body 1 is an integral elastic structure. The two sides of the middle part of the shaped charge tube body 1 are shaped charge sections. One side of the two shaped charge sections is integrally connected, and the other side is connected by a fastening structure 4, and they are enclosed to form a hollow tubular structure.

[0018] Specifically, the energy-concentrating unit includes two energy-concentrating grooves 3 connected in sequence. The cross-sectional shape of the energy-concentrating grooves 3 is a V-shape with the opening facing outwards. The energy-concentrating unit also has several energy-concentrating holes 2 at the energy-concentrating grooves 3.

[0019] The integrated, elastic shaped charge tube body 1 requires no assembly, significantly reducing manufacturing difficulty. Furthermore, the snap-fit ​​structure 4 simplifies the addition and removal of explosives, significantly improving blasting efficiency and solving the problem of cumbersome loading of explosives in existing split-type shaped charge tubes.

[0020] The two-layered, sequentially connected energy-concentrating grooves 3 can form a bidirectional energy-concentrating cutting effect, which is more significant than the cutting effect of a single-layer energy-concentrating groove 3. Combined with the enhanced guidance of the energy flow by the energy-concentrating holes 2, it can accurately control the direction of rock mass fissure opening, effectively avoid the bulging phenomenon and over- or under-excavation problems, significantly improve the quality of tunnel outline forming, and also reduce the amount of explosives used.

[0021] Combination Figure 3 Several energy-concentrating holes 2 are equidistantly distributed along the length of the energy-concentrating groove 3, making adjacent holes mutually adjacent to each other. The superimposed compression wave is transformed into a sparse wave, which causes rock molecules to form cracks. In the scenario of cutting the roof in the roadway, the cut can be neat and the integrity of the roof can be well protected, with excellent pressure relief effect.

[0022] Combination Figure 4 The positions of the two energy-concentrating slots 3 of the two energy-concentrating sections correspond one-to-one, and the axes of the energy-concentrating holes 2 on the corresponding two energy-concentrating slots 3 are perpendicular to the energy-concentrating slots 3. This maximizes the accuracy and synergy of the energy-concentrating effect. First, the corresponding positions of the energy-concentrating slots 3 of the two energy-concentrating sections make the bidirectional energy flow symmetrically distributed, avoiding the offset of the cutting direction caused by the misalignment of the energy-concentrating slots 3, ensuring the neatness of the cut. Especially in the scenario of cutting the roof in the roadway, it can reduce the irregular fragmentation of the roof rock mass, better protect the integrity of the roof, and improve the pressure relief effect. Second, the axis of the energy-concentrating hole 2 is perpendicular to the energy-concentrating slot 3, which enables the energy flow to be released accurately along the V-shaped energy-concentrating direction of the energy-concentrating slot 3. This achieves the synergistic effect of the energy-concentrating slot 3 guiding and the energy-concentrating hole 2 strengthening, significantly improving the penetration force of the energy flow, effectively increasing the crack length and the volume of rock breaking, and solving the problem of the dispersed energy-concentrating effect of the existing energy-concentrating tube.

[0023] The axis of the energy-concentrating hole 2 is located on the V-shaped central plane of the energy-concentrating groove 3 to achieve precise guidance of the energy flow. First, the V-shaped central plane is the area where the energy-concentrating effect of the energy-concentrating groove 3 is strongest. The axis of the energy-concentrating hole 2 coincides with this plane, which allows the energy flow to be released completely along the optimal energy-concentrating direction of the energy-concentrating groove 3, avoiding the cutting direction deviation caused by the energy flow deviation, significantly improving the directional cutting accuracy, and solving the problem of energy flow deviation in existing energy-concentrating tubes. Second, this design makes the energy-concentrating effects of the energy-concentrating hole 2 and the energy-concentrating groove 3 fully synergistic. After the energy flow is superimposed on the central plane, the penetration force is stronger, which can effectively penetrate harder rock masses and increase the depth and length of cracks.

[0024] The V-shaped opening angle of the energy-concentrating groove 3 is 40°-50°, so that the energy-concentrating flow can maintain sufficient penetration force and cover a certain rock-breaking width, which is suitable for the hardness of moderately weathered and slightly weathered rock masses commonly used in tunnel engineering. The preferred angle is 45°, which is compatible with the structure of the double-layer energy-concentrating groove 3. The bidirectional energy-concentrating flow can form complementary cutting areas at this angle, avoiding crack overlap or gaps, and further improving the continuity of the cut.

[0025] The inner side of the shaped charge tube body 1 is also provided with a filling buffer cavity 5 opposite to the location of the fastening structure 4. The filling buffer cavity 5 can absorb the impact force towards the filling buffer cavity 5 side during the explosion, prevent energy from being lost in non-target directions, and achieve local protection of the area. In addition, the buffer cavity can also be filled with inert buffer materials (such as foam, mortar, etc.), which can further weaken the downward energy and reduce the amount of explosive used, thereby reducing the cost of explosives while ensuring the blasting effect.

[0026] The cross-section of the packing buffer chamber 5 is a crescent shape with an inward concave shape, so as to maximize the use of the space inside the energy-concentrating tube body 1, increase the volume of the buffer chamber and enhance the energy absorption effect without occupying too much charge space.

[0027] The energy-concentrating tube body 1 is made of PVC material, which has good elasticity and can adapt to the design requirements of the integrated elastic structure of the energy-concentrating tube body 1 of this utility model. The outer wall of the fastening structure 4 and the filling buffer cavity 5 of the energy-concentrating tube body 1 is arc-shaped to match the pre-drilled slot hole at the blasting position, thereby improving the installation stability. During installation, the V-shaped opening of the energy-concentrating groove 3 faces the direction of the rock mass to be cut.

[0028] Combination Figure 5The fastening structure 4 includes an arc-shaped socket and an arc-shaped plug 43 arranged opposite to each other. The arc-shaped plug 43 is inserted into the arc-shaped socket. On the one hand, the arc-shaped structure has strong adaptability and can perfectly fit the elastic material of the shaped charge tube body 1. At the same time, the tight fit of the arc-shaped surface can improve the sealing of the tubular structure, prevent the explosive from leaking during installation, or prevent the explosive gas from escaping from the fastening gap in advance during blasting, and ensure that the blasting energy is concentrated in the target direction, thus improving the shaped charge effect. On the other hand, compared with traditional connection structures such as buckles and bolts, the arc-shaped insertion connection method is more convenient to disassemble and assemble. The fastening and fixing after the explosive is filled can be completed without additional tools, further improving the construction efficiency.

[0029] The opening of the arc-shaped socket has an inner and outer arc-shaped segment 41 and a second arc-shaped segment 42 on both sides. The length of the second arc-shaped segment 42 is greater than that of the first arc-shaped segment 41 to further optimize the stability of the fastening structure 4. The longer second arc-shaped segment 42 can increase the contact area between the plug and the socket, and improve the connection strength after fastening. At the same time, the inner and outer layered arc-shaped segments form a guide-type insertion channel, which can guide the arc-shaped plug 43 to be accurately inserted into the socket, reducing the alignment deviation during installation. In addition, the layered arc-shaped structure can also enhance the deformation resistance of the fastening point, prevent the elastic body from expanding the fastening gap when under force, and further improve the stability of the burst effect.

[0030] The insertion end of the arc-shaped plug 43 is an arc-shaped structure that abuts against the bottom of the arc-shaped socket, so that a continuous force-bearing surface is formed at the engagement point. At the same time, the smooth transition design of the arc-shaped end makes the plug insertion smoother, and in scenarios where the elastic body needs to be slightly deformed for engagement, it can reduce operating resistance and improve construction convenience.

Claims

1. A double-layer explosive shaped charge tube device, characterized in that, It includes the energy-concentrating tube body (1), which is an integral elastic structure; The middle part of the energy-concentrating tube body (1) has two opposite sides as energy-concentrating parts. One side of the two energy-concentrating parts is connected as a whole, and the other side is connected by a fastening structure (4) and enclosed to form a hollow tubular structure. The energy-concentrating part includes two energy-concentrating grooves (3) connected in sequence. The cross-sectional shape of the energy-concentrating groove (3) is a V-shape with the opening facing outwards. The energy-concentrating part also has several energy-concentrating holes (2) at the energy-concentrating groove (3).

2. The double-layer explosive shaped charge tube device as described in claim 1, characterized in that, The fastening structure (4) includes an arc-shaped socket and an arc-shaped plug (43) arranged opposite to each other, and the arc-shaped plug (43) is inserted into the arc-shaped socket.

3. The double-layer explosive shaped charge tube device as described in claim 2, characterized in that, The opening of the arc-shaped socket has a first arc segment (41) and a second arc segment (42) arranged inside and outside on both sides, and the length of the second arc segment (42) is greater than the length of the first arc segment (41).

4. The double-layer explosive shaped charge tube device as described in claim 2, characterized in that, The insertion end of the arc-shaped plug (43) is an arc-shaped structure that abuts against the bottom of the arc-shaped socket.

5. The double-layer explosive shaped charge tube device as described in claim 1, characterized in that, The energy-concentrating holes (2) are equidistantly distributed along the length of the energy-concentrating groove (3).

6. The double-layer explosive shaped charge tube device as described in claim 5, characterized in that, The positions of the two energy-concentrating slots (3) of the two energy-concentrating parts correspond one-to-one, and the axis of the energy-concentrating hole (2) on the corresponding two energy-concentrating slots (3) is perpendicular to the energy-concentrating slot (3).

7. The double-layer explosive shaped charge tube device as described in claim 1, characterized in that, The V-shaped opening angle of the energy-concentrating groove (3) is 40°-50°.

8. The double-layer explosive shaped charge tube device as described in claim 1, characterized in that, The inner side of the energy-concentrating tube body (1) is also provided with a filler buffer cavity (5) opposite to the location of the fastening structure (4).

9. A double-layer explosive shaped charge tube device as described in claim 8, characterized in that, The cross-section of the packing buffer cavity (5) is a crescent shape with an inward concave shape.

10. A double-layer explosive shaped charge tube device as described in any one of claims 1-9, characterized in that, The energy-concentrating tube body (1) is made of PVC material.

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