Explosion expansion type electronic detonator for detonating low-sensitivity explosive

Abstract

The utility model discloses an explosion expansion type electronic detonator for detonating low sensitivity explosive, which belongs to the technical field of detonating equipment, and comprises an electronic detonator (1), an explosion expansion pipe (2), a fixed plug (3) and a needling sleeve (4), the explosion expansion pipe (2) comprises an explosion expansion pipe shell (21) and high explosive (22), the electronic detonator (1) is arranged in the explosion expansion pipe shell (21) and above the high explosive (22), and the fixed plug (3) is arranged in the explosion expansion pipe shell (21). The fixing plug (3) is arranged on the periphery of the electronic detonator (1) in a sleeved mode, the lower portion of the fixing plug (3) is inserted into the upper portion in the explosion expansion tube shell (21), the upper end of the electronic detonator (1) is connected with the leg wire (5), and the lower end of the explosion expansion tube shell (21) is connected with the needling sleeve (4). The explosion expansion type electronic detonator disclosed by the utility model is simple in structure, quick to assemble and convenient to use, and can be widely applied to various open-air and underground blasting projects; and the manufacturing cost is lower than that of a primer, the water resistance is excellent, and the market prospect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of initiating devices, in particular to an expanding blasting electronic detonator for initiating low-sensitivity explosives. Background Art

[0002] Compared with commercial explosives, bulk explosives have lower manufacturing costs and eliminate the packaging and long-distance transportation links, but their detonation sensitivity is lower than that of commercial explosives. Bulk explosives for deep-hole blasting in large and medium-sized mines are usually initiated by means of 400g initiators, which are costly. In addition, at present, packaged explosives are mainly used. With the development of underground blasting technology and construction mechanization, the application of underground mixing trucks and bulk explosive technology will become the mainstream of underground blasting.

[0003] At present, initiators are mainly used for deep-hole blasting in large and medium-sized mines. In mining engineering or roadway driving and other projects, detonators are still used in combination with packaged explosives, and there are often phenomena where the detonator explodes but the explosive does not. Summary of the Invention

[0004] The purpose of the utility model is to provide an expanding blasting electronic detonator for initiating low-sensitivity explosives to solve the above problems.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows: an expanding blasting electronic detonator for initiating low-sensitivity explosives, comprising an electronic detonator, an expanding tube, a fixing plug and a puncturing sleeve. Among them, the expanding tube comprises an expanding tube shell and an explosive charge arranged at the lower part inside the expanding tube shell. The electronic detonator is arranged above the explosive charge inside the expanding tube shell. The fixing plug is sleeved on the outer periphery of the electronic detonator, and the lower part of the fixing plug is inserted into the upper part inside the expanding tube shell. The upper end of the electronic detonator is connected to a leg wire, and the lower end of the expanding tube shell is connected to the puncturing sleeve.

[0006] As a preferred technical scheme, the electronic detonator is a wireless electronic detonator.

[0007] As a preferred technical scheme, the outer diameter of the expanding tube shell is φ15mm - φ25mm.

[0008] As a preferred technical scheme, the total amount of the explosive charge is 6 - 20g.

[0009] The tube shell of the expanding tube can be made of metal or non-metal. The explosive charge inside the expanding tube can adopt conventional single-component explosive charges such as RDX and PETN or mixed explosive charges, including various new explosives similar to RDX explosives. The charging method can adopt direct filling and pressing or loading into pre-pressed tablets. Direct filling and pressing are carried out by a charging machine and a press, and the pre-pressed tablets are pressed by a special tablet press. Usually, the total amount of the expanding tube is 6 - 20g. For general blasting projects, the amount of the expanding tube is 6 - 10g to meet the requirements.

[0010] The direct filling and pressing type is charged in 3 - 4 times. Each time it is charged, it is pressed once. Before charging and pressing, the booster tube shell is loaded onto the combined mold. Each mold is loaded with 20 rounds. The charge amount each time is 2 - 3 g, and the pressure is not less than 150 MPa to ensure that the density of the charge column is not less than 1.5 g / cm 3 .

[0011] The tablet type is pressed by a special tablet press. The mass of each tablet is 3 g - 5 g, etc. Then the tablets are loaded into the booster tube shell. The total charge amount is 6 - 10 g, and the pressing density of the charge is not less than 1.5 g / cm 3 .

[0012] As a preferred technical solution, the material of the fixing plug (3) is rubber or flexible plastic.

[0013] The fixing plug is used to fix the electronic detonator and the booster tube, and the material usually adopts non - metallic materials such as rubber or flexible plastic.

[0014] As a preferred technical solution, after the fixing plug (3) is inserted into the booster tube shell (21), bayonet connection is carried out. The bayonet mark is a single mark, and the diameter is φ15 - φ16 mm.

[0015] As a preferred technical solution, the puncture sleeve (4) is made of hard material, and the lower end is sharp.

[0016] The function of setting the puncture sleeve is to ensure that the strip - shaped explosive charge can be quickly punctured, which is convenient for making the initiating body and ensuring that the product is centered. When supporting the bulk - loaded explosive, a mineral water bottle can be used to load the bulk - loaded explosive, and then the product is inserted, the leg wires are fixed, and then it is suspended into the blast hole. The material of the puncture sleeve usually adopts hard plastic or bakelite - like materials.

[0017] When the utility model is used in combination with the bulk - loaded explosive, it can be charged and assembled with the help of a plastic bottle to make an initiating body, or it can be inserted into the strip - shaped explosive to make an initiating body.

[0018] Compared with the prior art, the advantages of the utility model are as follows: The booster - type electronic detonator of the utility model has a simple structure, quick assembly, and convenient use, and can be widely used in various surface and underground blasting projects; moreover, the manufacturing cost is lower than that of the initiator, the water - resistance performance is excellent, and it has a good market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the embodiment of the utility model;

[0020] Figure 2 It is the structure diagram of the booster tube of the embodiment of the utility model;

[0021] Figure 3 It is the structure diagram of the fixing plug of the embodiment of the utility model;

[0022] In the figure: 1. Electric detonator; 2. Booster tube; 21. Booster tube shell; 22. High explosive; 3. Fixed plug; 4. Needle sleeve; 5. Leg wire; 6. Wire clamp. Specific embodiments

[0023] The present utility model will be further described below in conjunction with the accompanying drawings.

[0024] Embodiment 1:

[0025] Refer to Figure 1 , an explosive-expanding type electric detonator for detonating low-sensitivity explosives, including an electric detonator 1, a booster tube 2, a fixed plug 3 and a needle sleeve 4. Among them, the booster tube 2 includes a booster tube shell 21 and a high explosive 22 arranged at the lower part inside the booster tube shell 21. As Figure 2 shown, the electric detonator 1 is arranged above the high explosive 22 inside the booster tube shell 21. The fixed plug 3 is sleeved on the outer periphery of the electric detonator 1, and the lower part of the fixed plug 3 is inserted into the upper part inside the booster tube shell 21. The upper end of the electric detonator 1 is connected to the leg wire 5, and the other end of the leg wire 5 is connected to the wire clamp 6. The lower end of the booster tube shell 21 is connected to the needle sleeve 4;

[0026] In this embodiment, the outer diameter of the booster tube shell 21 is φ18mm, and the inner diameter is φ16mm.

[0027] The high explosive 22 uses a single-component high explosive, and its total charge is 6g;

[0028] The material of the fixed plug 3 is rubber, and its structure is as Figure 3 shown. Its upper outer diameter is φ17mm, and the inner diameter is φ8mm. The length of the lower part sleeved into the booster tube shell is 50mm. After the fixed plug 3 is inserted into the booster tube shell 21, it is connected by crimping, and the crimp mark is a single mark with a diameter of φ15mm;

[0029] The needle sleeve 4 uses hard plastic, and the lower end is sharp;

[0030] The assembly method is as follows: First, insert the electric detonator 1 into the fixed plug 3 to obtain an assembly; then insert the assembly into the booster tube 2, perform crimping, and then put on the needle sleeve 4 at the bottom to obtain the product.

[0031] The explosive-expanding type electric detonator of this embodiment was tested for blasting in Panzhihua Longmang Iron Mine. The explosive was bulk emulsion explosive. 10 holes were tested and all detonated normally. Then 20 more were added and still could detonate normally.

[0032] Embodiment 2:

[0033] Compared with Example 1, the total amount of the high explosive 22 in this example is 8 g, and the rest is the same as in Example 1. It was tested for blasting in Panzhihua Longmang Iron Mine. The explosive is a mixed emulsion explosive. 100 holes were tested and all detonated normally.

[0034] Example 3:

[0035] This example is the same as Example 2, that is, the total amount of the high explosive 22 still uses 8 g. It was tested for blasting in a certain iron mine of Taiyuan Iron and Steel. The explosive is a porous granular ammonium nitrate fuel oil explosive. 100 holes were tested and all detonated normally.

[0036] Example 4:

[0037] This example is the same as Example 1, that is, the total amount of the high explosive 22 still uses 6 g. It was tested for blasting in a certain iron mine of Taiyuan Iron and Steel. The explosive is a porous granular ammonium nitrate fuel oil explosive. 10 holes were tested and all detonated normally. Then 20 more shots were added and still all detonated normally.

[0038] Example 5:

[0039] This example is the same as Example 1, that is, the total amount of the high explosive 22 still uses 6 g. It was tested for blasting in a certain highway tunnel in Sichuan. The diameter of the blast hole is φ50 mm. The explosive used is a mixed emulsion explosive. The product is made into a detonating body in combination with a stick-shaped explosive. 200 holes were tested and all detonated normally. The blasting effect is good and no misfires occurred.

[0040] Comparative Example 1

[0041] Compared with Example 1, the total amount of the high explosive 22 in this comparative example is 5 g, and the rest is the same as in Example 1. It was tested for blasting in Panzhihua Longmang Iron Mine. The explosive is a mixed emulsion explosive. 10 shots were tested and 1 hole failed to detonate.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An explosive amplification type electronic detonator for initiating low-sensitivity explosives, characterized in that, It includes an electronic detonator (1), an booster (2), a fixing plug (3) and a puncture sleeve (4). Among them, the booster (2) includes a booster shell (21) and an explosive (22) arranged at the lower part inside the booster shell (21). The electronic detonator (1) is arranged above the explosive (22) inside the booster shell (21). The fixing plug (3) is sleeved on the outer periphery of the electronic detonator (1), and the lower part of the fixing plug (3) is inserted into the upper part inside the booster shell (21). The upper end of the electronic detonator (1) is connected to a leg wire (5), and the lower end of the booster shell (21) is connected to the puncture sleeve (4).

2. The booster-type electronic detonator for detonating low-sensitivity explosives according to claim 1, wherein The electronic detonator is a wireless electronic detonator.

3. The booster-type electronic detonator for initiating low-sensitivity explosives according to claim 1, wherein, The outer diameter of the booster shell (21) is φ15mm to φ25mm.

4. An expanding electronic detonator for initiating low-sensitivity explosives according to claim 1, characterized in that, The total amount of the explosive (22) is 6 to 20g.

5. An expanding electronic detonator for initiating low-sensitivity explosives according to claim 1, characterized in that, The material of the fixing plug (3) is rubber or flexible plastic.

6. The booster-type electronic detonator for detonating low-sensitivity explosives according to claim 1, characterized in that, After the fixing plug (3) is inserted into the booster shell (21), it is connected by crimping. The crimping mark is a single mark with a diameter of φ15 - φ16mm.

7. An expanding electronic detonator for initiating low-sensitivity explosives according to claim 1, characterized in that, The puncture sleeve (4) is made of a hard material and has a sharp lower end.

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