Primary and secondary pipe device for tunnel blasting

Abstract

The utility model relates to the technical field of tunnel blasting, and discloses a son-mother pipe device for tunnel blasting, which comprises a son pipe and a mother pipe, the inner wall of the mother pipe is provided with a pipe cavity, the son pipe is movably sleeved in the pipe cavity, the upper end of the son pipe is provided with a charging port, the inner wall of the son pipe is fixedly provided with a plurality of groups of limiting rings and energy-gathering rings, and the limiting rings and the energy-gathering rings are fixedly arranged on the inner wall of the mother pipe. The outer wall of the main pipe comprises a vanadium layer, a chromium layer, a molybdenum layer and a carbon layer, an energy gathering groove is formed in the outer wall of the auxiliary pipe, when the device is used, jet flow generated after explosive detonation can be gathered through the arranged energy gathering ring, then the jet flow is jetted to the group of explosives facing the jet flow to detonate the explosives, and therefore the explosive detonation efficiency is improved. In this way, all the explosives can be completely detonated through the energy gathering ring distributed at the front ends of the explosives, detonating cords are replaced for explosion propagation, and normal explosion of the explosives is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel blasting, in particular to a mother-and-child pipe device for tunnel blasting. Background Art

[0002] In the blasting construction of subway tunnels or coal mine tunnels, blasting sticks are indispensable tools used to push the explosive tube into the drill hole for blasting. Traditional blasting sticks are generally a PVC hose.

[0003] However, it still has some disadvantages. For example, tunnel blasting operations usually need to face fault fracture zones, which may lead to the problem of broken holes when loading, so that the explosives cannot be detonated normally, and fuses need to be laid to detonate the explosives. Due to the humid environment of the tunnel, the fuses are easily affected by moisture or water, which affects their normal detonation. In addition, the spacing between each group of explosives cannot be accurately set, which affects the blasting effect.

[0004] In order to solve the above problems, the present application proposes a mother-and-child pipe device for tunnel blasting. Utility Model Content

[0005] The purpose of the utility model is to provide a mother-and-child tube device for tunnel blasting, so as to solve the problems in the prior art proposed in the above-mentioned background technology that when charging, the explosives are broken and blocked, the fuse is easily affected by moisture and cannot be detonated normally, and the spacing between each group of explosives cannot be accurately set.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mother-and-child tube device for tunnel blasting, comprising a mother-and-child tube, the inner wall of the mother-and-child tube being provided with a tube cavity, the mother-and-child tube being movably sleeved in the tube cavity, the upper end of the mother-and-child tube being provided with a charging port, and the inner wall of the mother-and-child tube being fixedly installed with a plurality of sets of limiting rings and energy focusing rings.

[0007] Preferably, the outer wall of the mother tube includes a vanadium layer, a chromium layer, a molybdenum layer and a carbon layer.

[0008] Preferably, an energy-gathering groove is provided on the outer wall of the sub-tube.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model gathers the jet after the explosive is detonated by the energy-gathering ring, and then shoots it to the group of explosives towards which the jet is directed to detonate them. Similarly, all the explosives can be detonated by utilizing the energy-gathering rings distributed at the front ends of the explosives, thereby replacing the detonation of the fuse that is easily affected by moisture, and effectively ensuring the normal blasting of the explosives.

[0011] The utility model rotates the arranged mother tube so that the charging port of the child tube can be blocked by the mother tube, which can effectively prevent gravel in the borehole or water from entering the child tube from the charging port and damaging the explosive in the child tube. Since the outer layer of the mother tube is composed of a vanadium layer, a chromium layer, a molybdenum layer and a carbon layer, the hardness of the mother tube is extremely high. The mother tube is used to support the inner wall of the borehole, which effectively prevents the collapse of the borehole during tunnel blasting.

[0012] The utility model can fix the explosives by means of the limiting ring and the energy gathering ring arranged in the sub-tube, and further can accurately set the distance between each group of explosives, so that the best detonation effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of a mother-and-child pipe device for tunnel blasting according to the utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of a mother-and-child pipe device for tunnel blasting according to the utility model;

[0015] Figure 3 This is a schematic diagram of the main structure of an energy-gathering ring in a mother-and-child pipe device for tunnel blasting according to the utility model;

[0016] Figure 4 This is a schematic diagram of the layered structure of a mother tube in a mother-child tube device for tunnel blasting according to the utility model;

[0017] Figure 5 It is a schematic diagram of the enlarged structure of A in a mother-and-child pipe device for tunnel blasting of the utility model;

[0018] Figure 6 It is a plan view schematic diagram of the jet flow direction in a mother-and-child pipe device for tunnel blasting according to the utility model;

[0019] In the figure: 1. daughter tube; 2. mother tube; 3. tube cavity; 4. charging port; 5. limiting ring; 6. energy focusing ring; 7. vanadium layer; 8. chromium layer; 9. molybdenum layer; 10. carbon layer; 11. energy focusing groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-Figure 6The utility model provides a technical solution: a mother-and-child tube device for tunnel blasting, comprising a mother-and-child tube 1 and a daughter-and-child tube 2, the inner wall of the mother-and-child tube 2 is provided with a tube cavity 3, the daughter-and-child tube 1 is movably sleeved in the tube cavity 3, the upper end of the daughter-and-child tube 1 is provided with a charging port 4, a plurality of groups of limiting rings 5 ​​and energy-gathering rings 6 are fixedly installed on the inner wall of the daughter-and-child tube 1, the energy-gathering ring 6 is a conical structure, and after the explosives placed at the conical end thereof are detonated, they will be shot from the conical position of the energy-gathering ring 6 through its bottom to the next group of explosives to detonate them.

[0022] In this embodiment, Figure 4 Figure 5 As shown, the outer wall of the mother tube 2 includes a vanadium layer 7, a chromium layer 8, a molybdenum layer 9 and a carbon layer 10, and the outer wall of the daughter tube 1 is provided with an energy-gathering groove 11. The vanadium layer 7 is composed of vanadium elements and has high ductility. It can be integrated with the carbon elements in the carbon layer 10 to improve the strength, toughness and wear resistance of the mother tube 2. The chromium layer 8 and the molybdenum layer 9 are respectively composed of chromium elements and molybdenum elements, which can effectively improve the toughness and strength of the mother tube 2. V-shaped energy-gathering grooves 11 are provided on both sides of the daughter tube 1. The energy-gathering effect of the energy-gathering grooves is used to destroy the surrounding rocks of the mountain. After the explosive package explodes, the explosive energy close to the energy-gathering hole will converge toward the axial direction of the hole to form a high-density, high-speed and high-pressure gas jet. This energy-gathering effect can locally gather and generate extraordinary blasting energy, thereby increasing the explosion power of the explosive.

[0023] Working principle:

[0024] When using the mother-and-child tube device for tunnel blasting, firstly, the required explosives are placed between each group of limiting rings 5 ​​and energy-gathering rings 6 from the charging port 4 of the child tube 1, so that the explosives can be fixed by using the limiting rings 5 ​​and the energy-gathering rings 6, and then the spacing between each group of explosives can be accurately set to achieve the best detonation effect, and then the mother tube 2 is rotated so that the charging port 4 of the child tube 1 can be blocked by the mother tube 2, which can effectively prevent the gravel in the borehole or the water flow from the charging port 4 into the child tube 1 and damage the explosives in the child tube 1, and finally the mother tube 2 is inserted into the borehole. Because the outer layer of the mother tube 2 is composed of a vanadium layer 7, a chromium layer 8, a molybdenum layer 9 and a carbon layer 10, the hardness of the mother tube 2 is extremely high. The mother tube 2 is used to support the inner wall of the borehole, which effectively prevents the hole collapse during the tunnel blasting drilling process. Then, the explosives at the tube mouth are detonated, and the jet after the detonation of the explosives will be gathered through the energy gathering ring 6, and then shot to the group of explosives in the direction of the jet to detonate them. By analogy, the energy gathering ring 6 distributed at the front end of the explosives can be used to detonate all the explosives, replacing the fuse that is easily affected by moisture for detonation, effectively ensuring the normal blasting of the explosives.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A mother-child pipe device for tunnel blasting, comprising a mother-child pipe (1) and a daughter-child pipe (2), characterized in that: The inner wall of the mother tube (2) is provided with a tube cavity (3), the daughter tube (1) is movably sleeved in the tube cavity (3), the upper end of the daughter tube (1) is provided with a charge port (4), and the inner wall of the daughter tube (1) is fixedly mounted with a plurality of limit rings (5) and energy gathering rings (6).

2. The mother-and-child pipe device for tunnel blasting according to claim 1, characterized in that: The outer wall of the mother tube (2) comprises a vanadium layer (7), a chromium layer (8), a molybdenum layer (9) and a carbon layer (10).

3. The mother-and-child pipe device for tunnel blasting according to claim 1, characterized in that: The outer wall of the sub-tube (1) is provided with an energy-gathering groove (11).

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