Impact-resistant primary explosive-free safety detonator

Abstract

The utility model provides an impact-resistant primary-explosive-free safety detonator which comprises a detonator shell, a detonator tube plug is connected to the top end of the detonator shell, an electronic control module is arranged in the top end of the detonator shell, and an ignition head is arranged at the end, away from the detonator tube plug, of the electronic control module; a main charge, a second charge and a third charge are arranged at the bottom end in the detonator shell, an excitation assembly is arranged at the top of the second charge, the third charge is arranged in the excitation assembly, a first pored reinforcing cap is arranged above the excitation assembly, a second pored reinforcing cap is arranged above the first pored reinforcing cap, the top end of the excitation assembly abuts against the bottom end of the first pored reinforcing cap, and the top end of the second pored reinforcing cap abuts against the bottom end of the second pored reinforcing cap. The top end of the first pored reinforcing cap abuts against the bottom end of the second pored reinforcing cap, and the top end of the second pored reinforcing cap abuts against the electronic control module. According to the utility model, the stability and reliability of the overall structure of the detonator are improved, and the vibration resistance of the detonator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blasting equipment, in particular to an impact-resistant safety detonator without initiating explosives. Background Art

[0002] Due to their high thermal and mechanical sensitivity, the explosives in industrial detonators pose a safety risk of explosion during production, transportation, and use. They also generate a large amount of wastewater during the production and processing of detonators, resulting in high treatment costs. To address these issues, detonators without explosives (electronic detonators) have emerged. Application CN202122874467.7 proposes a new type of detonator without explosives. This detonator uses high explosives as the primary charge. The excitation assembly, the detonator shell, and the perforated reinforcing cap form an ignition, fire transmission, combustion, impact detonation, and detonation transmission sequence. This detonation achieves the equivalent detonation energy output of detonators with explosives, with similar instantaneousness and delay accuracy. The process requirements are relatively relaxed, and this new detonator has good prospects for widespread application.

[0003] However, during detonator use, sensitive ignition agents, in addition to the explosive, can also accidentally trigger the detonator to detonate, posing a safety risk. Furthermore, with the increasing use of electronic detonators in environments such as small-section tunnels, the impact resistance of electronic detonators has become increasingly prominent. Due to the confined space and the combined effects of blast shock wave reflections, electronic detonators often experience significant mechanical impact, especially at the relatively weak ignition head. This can easily shatter the electronic detonator's charge head, leading to detonator failure and other issues. This reduces the reliability and safety of detonators.

[0004] Therefore, in order to effectively improve the product reliability and safety of the overall structure of industrial detonators, a shock-resistant detonator without explosive is needed. Utility Model Content

[0005] To solve the problems in the background technology, the present invention proposes a shock-resistant, explosive-free safety detonator, comprising a detonator shell, a detonator plug connected to the top of the detonator shell, an electronic control module disposed inside the top of the detonator shell, and an ignition head disposed at the end of the electronic control module away from the detonator plug;

[0006] The interior of the detonator shell is provided with a main charge, a second charge and a third charge in sequence from the bottom to the top; an excitation assembly is fixed on the top of the second charge, and the third charge is arranged in the excitation assembly; a first perforated reinforcement cap is fixed above the excitation assembly, and a second perforated reinforcement cap is fixed above the first perforated reinforcement cap; the top of the excitation assembly is abutted against the bottom of the first perforated reinforcement cap, the top of the first perforated reinforcement cap is abutted against the bottom of the second perforated reinforcement cap, and the top of the second perforated reinforcement cap is abutted against the electronic control module.

[0007] Preferably, the longitudinal cross-sections of the excitation component and the first perforated reinforcement cap are both U-shaped.

[0008] Preferably, the longitudinal cross-section of the second perforated reinforcement cap is U-shaped, or the second perforated reinforcement cap is cylindrical.

[0009] Preferably, the outer diameter of the excitation component, the outer diameter of the first perforated reinforcing cap and the outer diameter of the second perforated reinforcing cap are not less than the inner diameter of the detonator shell, and the inner diameter of the second perforated reinforcing cap is smaller than the outer diameter of the electronic control module.

[0010] Preferably, the electronic control module is provided with an ignition head at one end which is tapered with a width at the top and a narrowness at the bottom. The diameter of the wide end of the tapered end of the electronic control module is the same as the outer diameter of the electronic control module, and the inner diameter of the second perforated reinforcing cap is larger than the diameter of the narrow end of the tapered section of the electronic control module.

[0011] Preferably, an inwardly protruding step is provided inside the detonator shell, and the bottom end of the excitation component is located on the step.

[0012] Preferably, the diameter of the through hole at the bottom of the second perforated reinforcement cap is larger than the diameter of the through hole at the bottom of the first reinforcement cap.

[0013] Preferably, the axial dimension of the second perforated reinforcement cap is 6-10 mm.

[0014] Preferably, the bottom end of the ignition head is 5-10 mm away from the three charges.

[0015] Preferably, the outer wall of the detonator shell is provided with a metal tube sleeve, and the first perforated reinforcement cap, the second perforated reinforcement cap and the excitation assembly are located inside the metal tube sleeve.

[0016] The beneficial effects of the utility model are:

[0017] The present invention is provided with a second perforated reinforcing cap, and the first perforated reinforcing cap, the excitation assembly, the main explosive, the second charge, and the third charge are all arranged below the second perforated reinforcing cap, and the top of the excitation assembly is against the bottom of the first perforated reinforcing cap, the top of the first perforated reinforcing cap is against the bottom of the second perforated reinforcing cap, and the top of the second perforated reinforcing cap is against the electronic control module. Under this structure, the top of the second perforated reinforcing cap forms a locking position with the electronic control module. When the detonator is detonated, the second perforated reinforcing cap and the electronic control module can ensure that the positions of the first perforated reinforcing cap and the excitation assembly do not move, thereby ensuring the stability of the detonator structure; at the same time, the bottom edge of the second perforated reinforcing cap has a good anti-bending effect, which can withstand the shock wave generated by the detonator detonation to a certain extent, better protect the ignition head from being easily broken by mechanical impact, thereby improving the impact resistance of the detonator shell.

[0018] The utility model can ensure that the charge is ignited quickly and safely, thereby improving the safety of the detonator in use, and can also ensure the stability and reliability of the overall structure of the detonator, thereby improving the vibration resistance of the detonator in special blasting environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model according to Example 1;

[0020] Figure 2 This is a schematic diagram of the overall structure of the utility model according to Example 2.

[0021] Numbers in the figure: 1. Detonator shell; 2. Detonator plug; 3. Electronic control module; 4. Ignition head; 5. First perforated reinforcement cap; 6. Second perforated reinforcement cap; 7. Excitation assembly; 8. Step; 9. Main charge; 10. Second charge; 11. Third charge; 12. Metal pipe sleeve. DETAILED DESCRIPTION

[0022] In order to make the present invention clearer and more understandable, the technical solution of the present invention is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one of the implementation methods and does not represent all embodiments.

[0023] In this article, terms such as "inside, outside, up, down, and longitudinal" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection.

[0024] Example 1:

[0025] Combined with attachment Figure 1 The impact-resistant non-explosive safety detonator comprises a detonator shell 1, a detonator plug 2 is connected to the top of the detonator shell 1, an electronic control module 3 is provided inside the top of the detonator shell 1, and an ignition head 4 is provided at the end of the electronic control module 3 away from the detonator plug 2;

[0026] The interior of the detonator shell 1 is provided with a main explosive 9, a second charge 10 and a third charge 11 in sequence from the bottom to the top, an excitation component 7 is fixed on the top of the second charge 10, and the third charge 11 is arranged in the excitation component 7, a first perforated reinforcement cap 5 is fixed above the excitation component 7, a second perforated reinforcement cap 6 is fixed above the first perforated reinforcement cap 5, the top of the excitation component 7 is against the bottom of the first perforated reinforcement cap 5, the top of the first perforated reinforcement cap 5 is against the bottom of the second perforated reinforcement cap 6, and the top of the second perforated reinforcement cap 6 is against the electronic control module 3, that is, the top edge of the excitation component 7 is in contact with the bottom edge of the first perforated reinforcement cap 5, the top edge of the first perforated reinforcement cap 5 is in contact with the bottom edge of the second perforated reinforcement cap 6, and the top edge of the second perforated reinforcement cap 6 is in contact with the electronic control module 3.

[0027] Specifically, the longitudinal cross-sections of the excitation component 7, the first perforated reinforcement cap 5 and the second perforated reinforcement cap 6 are all U-shaped, and the first perforated reinforcement cap 5 and the second perforated reinforcement cap 6 are both provided with through holes at the center positions of the bottom ends, and the through holes of the first perforated reinforcement cap 5 and the second perforated reinforcement cap 6 are concentrically arranged; the diameter of the through hole at the bottom of the second perforated reinforcement cap 6 is larger than the diameter of the through hole at the bottom of the first reinforcement cap, and the larger through hole at the bottom of the second perforated reinforcement cap 6 can ensure that the ignition head 4 can pass safely and normally; the axial dimension range of the second perforated reinforcement cap 6 is preferably 6-10mm, and the size of the second perforated reinforcement cap 6 is specifically adjusted in combination with the size of the electronic control module. The distance range between the bottom end of the ignition head 4 and the three charges 11 is preferably 5-10mm, so that the part with the strongest flame after the ignition head 4 burns can quickly ignite the three charges 11 through the through holes of the first perforated reinforcement cap 5 and the second perforated reinforcement cap 6.

[0028] Specifically, the second perforated reinforcing cap 6 may also adopt a cylindrical structure, and the inner hole of the second perforated reinforcing cap 6 is its through hole. The cylindrical structure of the second perforated reinforcing cap 6 makes the wall thickness of the second perforated reinforcing cap 6 larger, which can improve the anti-vibration protection effect.

[0029] Specifically, the outer diameters of the excitation assembly 7, the first perforated reinforcing cap 5, and the second perforated reinforcing cap 6 are not less than the inner diameter of the detonator shell 1, so that the outer walls of the excitation assembly 7, the first perforated reinforcing cap 5, and the second perforated reinforcing cap 6 are in tight contact with the inner wall of the detonator shell 1, thereby achieving the fixation of the excitation assembly 7, the first perforated reinforcing cap 5, and the second perforated reinforcing cap 6;

[0030] The inner diameter of the second perforated reinforcing cap 6 is smaller than the outer diameter of the electronic control module 3. Specifically, when the sizes of the detonator shell 1, the perforated reinforcing cap and the electronic control module 3 are out of tolerance, it is necessary to set the end of the electronic control module 3 with the ignition head 4 to be a cone with a wide upper part and a narrow lower part. The conical end of the electronic control module 3 is the front end PCB part of the electronic control module 3. The wide end diameter of the conical end of the electronic control module 3 is the same as the outer diameter of the electronic control module 3. The inner diameter of the second perforated reinforcing cap 6 is larger than the narrow end diameter of the conical section of the electronic control module 3, so that the upper edge of the second perforated reinforcing cap 6 forms a locking position with the electronic control module 3. The second perforated reinforcing cap 6 is limited by the electronic control module 3, which can ensure that the positions of the first perforated reinforcing cap 5, the second perforated reinforcing cap 6 and the excitation component 7 do not move, thereby ensuring the stability of the detonator structure.

[0031] Specifically, an inwardly protruding step 8 is provided inside the detonator shell 1, that is, the inner diameter of the part above the step 8 in the detonator shell 1 is larger than the inner diameter of the part below the step 8; the bottom end of the excitation component 7 is located on the step 8, specifically, the excitation component 7 is mounted on the step 8, further preventing the excitation component 7, the first perforated reinforcement cap 5, and the second perforated reinforcement cap 6 from moving inside the detonator shell 1.

[0032] Example 2:

[0033] The basic structural properties of this embodiment are consistent with those of the impact-resistant, explosive-free safety detonator in Example 1. The difference is that a metal sleeve 12 is provided on the outer wall of the detonator housing 1 in this embodiment, and the first perforated reinforcing cap 5, the second perforated reinforcing cap 6, and the excitation assembly 7 are located inside the metal sleeve 12. Specifically, the top end of the metal sleeve 12 is flush with or slightly higher than the top surface of the second reinforcing cap 6, and the bottom end of the metal sleeve 12 is flush with or slightly lower than the bottom surface of the excitation assembly 7.

[0034] Currently, electronic detonators commonly use Tai'an (Tai'an) as the primary, secondary, and tertiary charge. Tai'an is an insensitive high explosive, but it exhibits a rapid detonation growth rate, transitioning quickly from combustion to detonation after the ignition tip burns. However, Tai'an's high price and limited supply increase detonator costs.

[0035] This embodiment utilizes RDX (Hexamethyldisilazane) as the primary explosive 9, secondary charge 10, and tertiary charge 11 of the detonator. While RDX exhibits slower detonation growth than Taian explosives, it is readily available and relatively affordable. The addition of a metal sleeve 12 to the exterior of the detonator shell 1 improves the shell's impact resistance. Furthermore, by increasing the restraint of the detonator shell 1, the ignition head 4 generates significant internal pressure during the ignition of the tertiary charge 11. This ensures downward pressure transfer, forcing the bottom of the excitation assembly 7 to flip, causing fragments to rupture and ignite subsequent charges. This prevents pressure leakage that could rupture the shell 1 and cause the detonator to fail to detonate. This embodiment addresses the issue of slow explosive growth.

[0036] Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shock-resistant safety detonator without explosive, comprising a detonator shell (1), wherein the top end of the detonator shell (1) is connected to a detonator plug (2), and characterized in that: An electronic control module (3) is provided inside the top end of the detonator shell (1), and an ignition head (4) is provided at one end of the electronic control module (3) away from the detonator plug (2); The detonator shell (1) is provided with a main explosive (9), a second charge (10) and a third charge (11) in sequence from the bottom to the top, an excitation component (7) is fixed on the top of the second charge (10), and the third charge (11) is arranged in the excitation component (7), a first perforated reinforcement cap (5) is fixed on the top of the excitation component (7), a second perforated reinforcement cap (6) is fixed on the top of the first perforated reinforcement cap (5), the top of the excitation component (7) is against the bottom of the first perforated reinforcement cap (5), the top of the first perforated reinforcement cap (5) is against the bottom of the second perforated reinforcement cap (6), and the top of the second perforated reinforcement cap (6) is against the electronic control module (3).

2. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The longitudinal cross-sections of the excitation component (7) and the first perforated reinforcement cap (5) are both U-shaped.

3. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The longitudinal cross-section of the second perforated reinforcement cap (6) is U-shaped, or the second perforated reinforcement cap (6) is cylindrical.

4. The shock-resistant explosive-free safety detonator according to claim 2 or 3, characterized in that: The outer diameter of the excitation component (7), the outer diameter of the first perforated reinforcing cap (5), and the outer diameter of the second perforated reinforcing cap (6) are not less than the inner diameter of the detonator shell (1), and the inner diameter of the second perforated reinforcing cap (6) is less than the outer diameter of the electronic control module (3).

5. The shock-resistant explosive-free safety detonator according to claim 4, characterized in that: The electronic control module (3) is provided with an ignition head (4) at one end thereof, which is tapered with a width at the top and a narrowness at the bottom. The diameter of the wide end of the tapered end of the electronic control module (3) is the same as the outer diameter of the electronic control module (3), and the inner diameter of the second perforated reinforcing cap (6) is larger than the diameter of the narrow end of the tapered section of the electronic control module (3).

6. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: An inwardly protruding step (8) is provided inside the detonator shell (1), and the bottom end of the excitation component (7) is located on the step (8).

7. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The diameter of the bottom through hole of the second perforated reinforcing cap (6) is greater than the diameter of the bottom through hole of the first reinforcing cap.

8. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The axial dimension of the second perforated reinforcing cap (6) is 6-10 mm.

9. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The bottom end of the ignition head (4) is 5-10 mm away from the three-powder charge (11).

10. The shock-resistant explosive-free safety detonator according to claim 1, characterized in that: The outer wall of the detonator shell (1) is provided with a metal tube sleeve (12), and the first perforated reinforcement cap (5), the second perforated reinforcement cap (6) and the excitation assembly (7) are located inside the metal tube sleeve (12).

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