Flyer detonator with closed explosive head

Abstract

The invention discloses a flyer detonator with a closed explosive head, and relates to the technical field of explosive materials, the flyer detonator comprises a shell, one end of the shell is sealed, and the other end of the shell is provided with a sealing plug; the ignition element comprises a leg wire and an excitation powder head, and the leg wire penetrates through the sealing plug and is connected with the excitation powder head; the piston is arranged in the tube shell, the excitation powder head is located in the piston, the outer wall of the piston is in sealed connection with the inner wall of the tube shell, and the sealing plug is in sealed connection with the inner wall of the tube shell; the tube shell is filled with the first high explosive, the second high explosive and the third high explosive in sequence, and a cavity is formed between the third high explosive and the piston. A reinforcing cap on the upper portion of the piston and explosives in the piston are omitted, on one hand, raw material cost is saved, production cost is reduced, on the other hand, machining procedures of the reinforcing cap and the explosives in the piston are reduced, and production efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of blasting materials, in particular to a powder head sealed flying piece detonator. Background Art

[0002] In the field of detonator technology, flying piece detonator is a common type of detonator, which realizes the explosion function of the detonator through a specific internal action mechanism and has important applications in related blasting operations and other scenarios.

[0003] Traditional flying piece detonators usually include a tube shell, an ignition element, a piston and a high explosive. A reinforcing cap is arranged on the upper part of the piston, and a built-in explosive is arranged inside the piston. A fire transfer hole is arranged on the reinforcing cap, and its main purpose is to realize the transmission of flame. After the detonator is externally excited, the flame generated by the initial ignition signal needs to be transmitted to the built-in explosive inside the piston through a specific channel, so that the explosive can be ignited and then start a series of subsequent reaction processes. The reinforcing cap and its fire transfer hole play such a role of guiding the flame and ensuring that the flame can accurately reach the predetermined position (built-in explosive), and can seal energy to ensure that the detonator explosion reaction chain can be started smoothly; in order to ensure that the built-in explosive can blow the piston open and form flying pieces, a reinforcing cap must be used to constrain the energy of the explosive in the piston to ensure that the energy is sufficient to open the piston, so the reinforcing cap and built-in explosive are both necessary in traditional flying piece detonators.

[0004] However, the fire transmission hole on the reinforcing cap is not conducive to restraining the built-in explosive in the piston, which will affect the utilization of energy. The built-in explosive in the piston, on the one hand, causes a large amount of explosive to be used, and on the other hand, adds a process of installing the built-in explosive in the piston, which increases the complexity and danger of the production of the flying piece detonator. Summary of the invention

[0005] The purpose of the present invention is to provide a powder head sealed flying piece detonator to solve the problems existing in the above-mentioned prior art and reduce the production cost of the flying piece detonator.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a powder head sealed flying piece detonator, comprising:

[0008] A tube shell, one end of which is sealed and the other end of which is provided with a sealing plug;

[0009] An ignition element, the ignition element comprising a foot line and an excitation medicine head, the foot line passes through the sealing plug and is connected to the excitation medicine head;

[0010] A piston, wherein the piston is disposed in the tube shell, the excitation medicine head is located in the piston, and the outer wall of the piston is sealedly connected to the inner wall of the tube shell, and the sealing plug is sealedly connected to the inner wall of the tube shell;

[0011] The first high explosive, the second high explosive and the third high explosive are sequentially filled in the tube shell, the third high explosive is closer to the piston than the second high explosive, the second high explosive is closer to the piston than the first high explosive, the third high explosive and the piston are spaced apart along the length direction of the tube shell, and the third high explosive is farther away from the sealing plug than the piston, and a cavity is formed between the third high explosive and the piston.

[0012] Preferably, the sealing plug is interference fit with the tube shell.

[0013] Preferably, the piston is interference fit with the tube housing.

[0014] Preferably, the tube shell is cylindrical.

[0015] Preferably, the tube shell is made of copper or iron.

[0016] Preferably, the density of the third high explosive, the second high explosive and the first high explosive gradually increases in a direction away from the piston.

[0017] Preferably, the piston is made of metal.

[0018] Preferably, the piston is in the shape of a cylinder with one end open and the other end closed.

[0019] Preferably, the sealing plug partially extends into the piston.

[0020] Preferably, the portion of the sealing plug extending into the piston has an interference fit with the piston.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The head-sealed flying piece detonator of the present invention eliminates the reinforcing cap on the upper part of the piston and the explosive in the piston, which saves the cost of raw materials and thus reduces the production cost, and on the other hand reduces the processing steps of the reinforcing cap and the explosive in the piston, thereby improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of a traditional flying piece detonator;

[0025] Figure 2 This is a schematic diagram of the structure of the closed-type flying-piece detonator with a charge head in this embodiment;

[0026] In the figure: 1. first high explosive; 2. second high explosive; 3. third high explosive; 4. cavity; 5. built-in explosive; 6. piston; 7. reinforcing cap; 8. sealing plug; 9. foot line; 10. ignition head; 11. tube shell. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a powder head sealed flying piece detonator to solve the problems existing in the above-mentioned prior art and reduce the production cost of the flying piece detonator.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 2 As shown, this embodiment provides a charge-sealed flying-piece detonator, comprising:

[0031] A tube shell 11, one end of the tube shell 11 is sealed and the other end is provided with a sealing plug 8;

[0032] The ignition element includes a foot line 9 and an excitation medicine head 10, and the foot line 9 passes through the sealing plug 8 and is connected to the excitation medicine head 10;

[0033] The piston 6 is arranged in the tube shell 11, the excitation medicine head 10 is located in the piston 6, and the outer wall of the piston 6 is sealed to the inner wall of the tube shell 11, and the sealing plug 8 is sealed to the inner wall of the tube shell 11;

[0034] The first high explosive 1, the second high explosive 2 and the third high explosive 3 are sequentially filled in the tube shell 11, the third high explosive 3 is closer to the piston 6 than the second high explosive 2, the second high explosive 2 is closer to the piston 6 than the first high explosive 1, the third high explosive 3 and the piston 6 are spaced apart along the length direction of the tube shell 11, and the third high explosive 3 is farther away from the sealing plug 8 than the piston 6, and a cavity 4 is formed between the third high explosive 3 and the piston 6.

[0035] In the optional scheme of the present embodiment, it is more preferred that the piston 6 is cylindrical with one end open and the other end closed, and the open end of the piston 6 faces the sealing plug 8; the sealing plug 8 partially extends into the piston 6; the part of the sealing plug 8 extending into the piston 6 has an interference fit with the piston 6, the sealing plug 8 has an interference fit with the tube shell 11, and the piston 6 has an interference fit with the tube shell 11.

[0036] Specifically, the inner diameter of the tube shell 11 is reduced (i.e., the mouth is reduced) so that the piston 6 and the sealing plug 8 are respectively interference fit with the tube shell 11, and the mouth of the piston 6 is reduced so that the sealing plug 8 and the piston 6 are interference fit, thereby ensuring the sealing of the cavity formed between the sealing plug 8 and the piston 6. In actual applications, other reasonable measures can also be taken to ensure the sealing, such as providing a sealing layer between the sealing plug 8 and the piston 6 to enhance the sealing.

[0037] The tube shell 11 is a relatively common part in the art. In this embodiment, the tube shell 11 is cylindrical and is made of copper or iron. The technicians can select the material of the tube shell 11 according to actual needs.

[0038] In the optional scheme of the present embodiment, it is more preferred that the density of the third high explosive 3, the second high explosive 2 and the first high explosive 1 gradually increases in the direction away from the piston 6. Specifically, the density of the first high explosive 1 gradually increases in the direction away from the piston 6, the density of the second high explosive 2 gradually increases in the direction away from the piston 6, and the density of the third high explosive 3 gradually increases in the direction away from the piston 6, and the density of the second high explosive 2 is greater than the density of the third high explosive 3, and the density of the first high explosive 1 is greater than the density of the first high explosive 1; through the above-mentioned setting, the density of the explosive first increases from low to high, and as the density increases, its detonation velocity also increases, and the explosion transmission stability also improves. When the density of the explosive reaches the optimum, its detonation velocity and energy output reach the maximum value.

[0039] In an optional solution of this embodiment, it is more preferred that the material of the piston 6 is metal.

[0040] like Figure 1As shown, the structure of the traditional flying piece detonator includes a foot line 9, an exciting charge head 10, a piston 6, a third high explosive 3, a second high explosive 2 and a first high explosive 1, a reinforcing cap 7 is arranged on the upper part of the piston 6, a built-in explosive 5 is arranged in the piston 6, and a fire transfer hole is arranged on the reinforcing cap 7, the main purpose of which is to realize the transmission of flame. After the detonator is externally excited, the flame generated by the initial ignition signal needs to be transmitted to the explosive inside the piston 6 through a specific channel, so that the explosive can be ignited and then start a series of subsequent reaction processes. The reinforcing cap 7 and its fire transfer hole play such a role of guiding the flame and ensuring that the flame can accurately reach the built-in explosive 5, ensuring that the detonator explosion reaction chain can be started smoothly. However, the fire transfer hole on the reinforcing cap 7 is not conducive to constraining the gunpowder in the piston 6, which will affect the utilization of energy. Arranging explosives in the piston 6, on the one hand, causes a large amount of explosives to be used, and on the other hand, adds a process of loading gunpowder in the piston 6, which increases the complexity and danger of making flying piece detonators.

[0041] Reference Figure 2 The working principle of the sealed flying piece detonator with a charge head of the present embodiment is as follows: when the foot line 9 transmits external energy to ignite the excitation charge head 10, since the cavity formed between the piston 6 and the end plug is completely sealed, after the excitation charge head 10 is ignited, high-temperature and high-pressure gas is generated in the piston 6. The generated high-temperature and high-pressure gas bursts the bottom of the piston 6 (i.e., the sealed end of the piston 6 itself), and the flying pieces generated by the bursting of the bottom of the piston 6 together with the shock wave act on the third high explosive 3, causing the third high explosive 3 to explode, and then causing the second high explosive 2 to explode, and then causing the first high explosive 1 to explode, thereby forming the detonation of the flying piece detonator. The sealed flying piece detonator with a charge head of the present embodiment is relatively Figure 1 The conventional flying piece detonator shown in the figure, by eliminating the reinforcing cap 7 on the upper part of the piston 6 and the explosive in the piston 6, saves the cost of raw materials on the one hand, thereby reducing the production cost, and on the other hand reduces the processing steps of the reinforcing cap 7 and the explosive in the piston 6, which can improve the production efficiency.

[0042] In addition, it is worth mentioning that in order to ensure that the excitation charge head 10 can blow up the piston 6 in this embodiment, the volume of the excitation charge head 10 in this embodiment is increased by about 10% to 50% compared with the charge head in the traditional flying piece detonator, and in terms of component composition, the excitation charge head 10 in this embodiment is further added with some high explosives compared with the charge head in the traditional flying piece detonator, and the mass of the high explosives in the excitation charge head 10 accounts for 10% to 50% of the total mass of the excitation charge head 10.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A closed-type flying-piece detonator with a charge head, characterized in that: include: A tube shell, one end of which is sealed and the other end of which is provided with a sealing plug; An ignition element, the ignition element comprising a foot line and an excitation medicine head, the foot line passes through the sealing plug and is connected to the excitation medicine head; A piston, wherein the piston is disposed in the tube shell, the excitation medicine head is located in the piston, and the outer wall of the piston is sealedly connected to the inner wall of the tube shell, and the sealing plug is sealedly connected to the inner wall of the tube shell; The first high explosive, the second high explosive and the third high explosive are sequentially filled in the tube shell, the third high explosive is closer to the piston than the second high explosive, the second high explosive is closer to the piston than the first high explosive, the third high explosive and the piston are spaced apart along the length direction of the tube shell, and the third high explosive is farther away from the sealing plug than the piston, and a cavity is formed between the third high explosive and the piston.

2. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The sealing plug is interference fit with the tube shell.

3. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The piston is interference fit with the tube housing.

4. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The tube shell is cylindrical.

5. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The material of the tube shell is copper or iron.

6. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The density of the third secondary explosive, the second secondary explosive and the first secondary explosive gradually increases in a direction away from the piston.

7. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The material of the piston is metal.

8. The charge-sealed flying-piece detonator according to claim 1, characterized in that: The piston is in the shape of a cylinder with one end open and the other end closed.

9. The charge-sealed flying-piece detonator according to claim 8, characterized in that: The sealing plug partially extends into the piston.

10. The charge-sealed flying-piece detonator according to claim 9, characterized in that: The portion of the sealing plug extending into the piston has an interference fit with the piston.

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