Flyer electronic detonator based on high explosive physical sensitization

Abstract

The utility model relates to a flyer electronic detonator based on high explosive physical sensitization, which comprises a detonator shell and a main charge filled in the detonator shell, the main charge comprises a primary charge layer and a secondary charge layer which are sequentially arranged at the closed end of the detonator shell, and the secondary charge layer is formed by filling a mixture of a physical sensitizer and a high explosive. The secondary charging layer is formed by filling the mixture of the physical sensitizer and the high explosive, the physical sensitizer provides a tiny cavity for the dense high explosive, the sensitivity of the high explosive is improved, the high explosive can be rapidly heated when being impacted, and a hot spot is provided when the explosive is detonated, so that the compact charging can still be detonated smoothly; the problem that the quality control is not facilitated due to density change caused by three-time charging of a common detonator structure during transportation and storage is effectively solved, and the quality control of the flyer detonator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blasting equipment, in particular to a flying plate electronic detonator based on physical sensitization of high explosives. Background Art

[0002] "Sensitization" is a technology to improve the sensitivity of explosives so that they can be detonated. The patent with the publication number CN102746074B proposes a method for sensitizing explosives, providing microspheres with thermal expansion characteristics. The mixture of them and a dispersion carrier is heated and expanded in a disk-type steam puffing machine, and then introduced into the explosives and mixed evenly to complete the sensitization of the explosives. The patent with the publication number CN1057289C provides an explosive containing a foam sensitizer. An air-in-liquid foam with pores is added to the base material of the explosive composition to sensitize it. The foam refers to adding a viscosity control agent and a foaming agent to a water or non-aqueous liquid carrier to make it stable. The explosive composition is an oil-in-water emulsion explosive or a water-in-oil slurry explosive. The patent with the publication number CN101870626B provides a rapid sensitizer for emulsion explosives. Its components are two types. One contains sodium nitrite, ammonium nitrate, and water, and the other contains oxalic acid and thiourea. Research finds that the sensitization technology is mainly used in the production of civil emulsion explosives. A sensitizer is added to an emulsion matrix that does not have detonator sensitivity so that it can be detonated by a detonator. High explosives are the main charges of weaponry. RDX (cyclonite), PETN (pentaerythritol tetranitrate), and HMX (octogen) are typical high explosives. The production efficiency and cost of different types of high explosives vary greatly. Sorting by output from high to low and cost from low to high, the above three high explosives are in the order of: RDX, PETN, HMX.

[0003] The flying plate detonator is a type of detonator without primary explosive that has been mass-produced at present. Its design concept is to use a high-speed moving flying plate to impact and detonate the main charge at the bottom of the detonator. The flying plate detonator has been successfully applied in detonating fuse detonators and electric detonators. For example, the patent with the publication number CN1010124B discloses a simple flying plate detonator without primary explosive, and proposes an inner shell design. Ignition charge is filled in the inner shell, and the energy generated by detonating a small amount of high explosive impacts the lower cavity of the inner tube, forming a high-speed moving metal flying plate, which impacts and detonates the charge inside the detonator. However, since the main charge of this detonator needs to be detonated by the impact of a high-speed moving flying plate, the tertiary charge is loosely loaded and there is a certain distance between the tertiary charge and the flying plate, which is likely to cause density changes during transportation and storage, and is not conducive to quality control. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a flying plate electronic detonator based on physical sensitization of high explosives. Based on the physical sensitization technology of high explosives, the sensitivity of high explosives is improved, and the problem that density changes during transportation and storage are not conducive to quality control is solved.

[0005] A flying plate electronic detonator based on physical sensitization of high explosives proposed by the present utility model includes a shell and a main charge loaded in the shell. The main charge includes a primary charge layer and a secondary charge layer arranged in sequence at the closed end of the shell, and the secondary charge layer is formed by filling a mixture of a physical sensitizer and a high explosive.

[0006] The secondary charge layer of the present utility model is formed by filling a mixture of a physical sensitizer and a high explosive. The physical sensitizer provides micro-cavities for the dense high explosive, improves the sensitivity of the high explosive, can rapidly heat up under impact, provides hot spots during the initiation of the explosive, and enables the compacted charge to still be initiated smoothly, effectively improving the problem that the density change of the three-stage charge in the common detonator structure during transportation and storage is not conducive to quality control, and improving the quality control of the flying plate detonator.

[0007] As a further improvement of the above scheme of the present utility model, the primary charge layer is formed by filling a high explosive or a mixture of a physical sensitizer and a high explosive.

[0008] As a further improvement of the above scheme of the present utility model, both the primary charge layer and the secondary charge layer are compacted during filling, and the compaction density of the primary charge layer is greater than that of the secondary charge layer. By compacting the primary charge layer and the secondary charge layer, the density change of the main charge during transportation and storage is effectively prevented.

[0009] As a further improvement of the above scheme of the present utility model, the compaction density of the primary charge layer is 1.6 - 1.8 g / cm 3 .

[0010] As a further improvement of the above scheme of the present utility model, the compaction density of the secondary charge layer is 1.2 - 1.6 g / cm 3 .

[0011] As a further improvement of the above scheme of the present utility model, the high explosive is cyclotrimethylenetrinitramine (RDX), pentaerythritol tetranitrate (PETN) or octogen (HMX). Since the particle size of RDX is small and it is easy to agglomerate and absorb moisture, it needs to be subjected to conventional passivation or granulation treatment before use, and then the subsequent physical sensitization process can be carried out. PETN and HMX have good discreteness and can directly carry out the subsequent physical sensitization process.

[0012] As a further improvement of the above scheme of the present utility model, the physical sensitizer is glass microspheres or expanded perlite powder.

[0013] As a further improvement of the above scheme of the present utility model, by mass, in the mixture of the physical sensitizer and the high explosive, the mass fraction of the physical sensitizer is 0.2% - 10%. The physical sensitizer and the high explosive are physically mixed.

[0014] As a further improvement of the above solution of the present utility model, the true density of the glass microspheres is 0.12 - 0.60 g / cm 3 , and the particle size is 15 - 135 μm. The glass microspheres are a kind of ultra-lightweight material in the form of hollow and airtight regular spherical powder.

[0015] As a further improvement of the above solution of the present utility model, the true density of the expanded perlite fine powder is 0.1 - 0.4 g / cm 3 , and the particle size is 15 - 75 μm. The expanded perlite fine powder is an ultra-fine white powdery perlite separated during the expansion process of expanded perlite.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] 1. The secondary charge layer of the present utility model is filled with a mixture of a physical sensitizer and an explosive. The physical sensitizer provides tiny cavities for the dense explosive, improves the sensitivity of the explosive, can quickly heat up under impact, provides hot spots during explosive initiation, and can still be smoothly initiated even after being compacted, effectively improving the problem that the density change caused by the three-stage charge of the common detonator structure during transportation and storage is not conducive to quality control, and improving the quality control of the flyer detonator.

[0018] 2. The present utility model compacts the primary charge layer and the secondary charge layer during filling, effectively preventing the density change of the main charge during transportation and storage, and further improving the problem that the density change caused during transportation and storage is not conducive to quality control. Description of the Drawings

[0019] Figure 1 FIG. is a schematic structural diagram of a flyer electronic detonator based on physical sensitization of an explosive proposed by the present utility model.

[0020] Reference numerals: 1, shell; 2, primary charge layer; 3, secondary charge layer. Detailed Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Example 1

[0023] Refer to Figure 1, this embodiment provides a flyer plate electronic detonator based on physical sensitization of high explosives, mainly including a shell 1 and a main charge loaded in the shell 1.

[0024] The shell 1 is used to provide a sealed reaction chamber. In this embodiment, for the convenience of the preparation, transportation, storage and use of the shell 1, the shell 1 adopts a hollow cylindrical structure, and the size of the shell 1 can be reasonably designed according to the actual use situation. The shell 1 adopts an iron shell, which restricts the scattering of reactants during the initiation stage, is beneficial to full reaction and improves the energy release efficiency. In addition, after reaching a certain degree of detonation, the shell 1 is prone to breakage and has little energy loss. Of course, in other embodiments, the shell 1 can also be a shell of other materials with certain strength and ductility, for example, an aluminum shell or a polymer material shell.

[0025] The main charge includes a primary charge layer 2 and a secondary charge layer 3 sequentially arranged at the closed end of the shell 1. In this embodiment, both the primary charge layer 2 and the secondary charge layer 3 are filled and formed by a mixture of a physical sensitizer and a high explosive, and the content of the physical sensitizer is 0.5%. In this embodiment, the physical sensitizer adopts glass microspheres. Glass microspheres are a kind of hollow and airtight spherical, powdery and ultra-light material, and the true density is 0.12 - 0.60 g / cm 3 , and the particle size is 15 - 135 μm. In this embodiment, the high explosive adopts RDX passivated by paraffin. Since the particle size of the high explosive RDX is small, it is easy to agglomerate and absorb moisture. Therefore, it needs to be subjected to conventional passivation or granulation treatment before use, and then the subsequent physical sensitization process can be carried out. Of course, in other embodiments, the physical sensitizer can also be expanded perlite powder, and the high explosive can also be PETN or HMX.

[0026] In this embodiment, both the primary charge layer 2 and the secondary charge layer 3 are filled and formed by a mixture of a physical sensitizer and a high explosive, and are compacted during filling. The compaction density of the primary charge layer 2 is 1.6 - 1.8 g / cm 3 , and the compaction density of the secondary charge layer 3 is 1.2 - 1.6 g / cm 3 . By adding a physical sensitizer to the high explosive, the physical sensitizer provides tiny cavities for the dense high explosive, improves the sensitivity of the high explosive, can quickly heat up under the impact action, provides hot spots during the initiation of the explosive, and can still be smoothly initiated even after compaction treatment, ensuring that the detonator can be completely normally initiated, preventing density changes of the main charge during transportation and storage, and improving the quality control of the flyer plate detonator.

[0027] In this embodiment, the drop hammer sensitivity H of the physically sensitized RDX after mixing 50It is 15 cm, meeting the sensitivity requirements of the main charge required for detonators. The detonators can fully initiate normally, and their performance such as lead plate perforation and initiation ability meets the requirements. At the same time, since the main charge of existing detonators is PETN, but the production of PETN is not as high as that of RDX, there may be a situation during war that the production of PETN is insufficient to support the demand for detonating cords and the main charge of detonators. The physical sensitization method for improving the sensitivity of RDX provided in this embodiment can achieve the purpose of using RDX as the main charge of detonators and can be used as a substitute for PETN in certain cases.

[0028] Example 2

[0029] This embodiment provides a flyer plate electronic detonator based on the physical sensitization of high explosives. The difference from Example 1 is that in this embodiment, the primary charge layer 2 is filled with RDX. Similarly, the drop hammer sensitivity H of the physically sensitized RDX after mixing in this embodiment 50 is 15 cm, meeting the sensitivity requirements of the main charge required for detonators. The detonators can fully initiate normally, and their performance such as lead plate perforation and initiation ability meets the requirements.

[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0031] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A flying chip electronic detonator based on physical sensitization of high explosives, comprising a tube shell (1) and a main charge filled in the tube shell (1), characterized in that: The main charge comprises a primary charge layer (2) and a secondary charge layer (3) which are sequentially arranged on a tube shell (1); the secondary charge layer (3) is formed by filling a mixture of a physical sensitizer and a secondary explosive.

2. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 1 is characterized in that: The primary charge layer (2) is formed by filling with secondary explosive or by filling with a mixture of a physical sensitizer and secondary explosive.

3. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 1 is characterized in that: The primary charge layer (2) and the secondary charge layer (3) are both compacted during filling, and the compaction density of the primary charge layer (2) is greater than the compaction density of the secondary charge layer (3).

4. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 3 is characterized in that: The compacted density of the primary charge layer (2) is 1.6 to 1.8 g / cm 3 .

5. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 3 is characterized in that: The compacted density of the secondary charge layer (3) is 1.2 to 1.6 g / cm 3 .

6. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 1 or 2, characterized in that: The high explosive is RDX, PETN or Octogen.

7. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 1 or 2, characterized in that: The physical sensitizer is glass microspheres or expanded perlite powder.

8. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 1 or 2, characterized in that: In the mixture of the physical sensitizer and the secondary explosive, the mass fraction of the physical sensitizer is 0.2%-10% by mass.

9. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 7 is characterized in that: The actual density of the glass microspheres is 0.12 to 0.60 g / cm 3 , particle size is 15~135μm.

10. The flying chip electronic detonator based on physical sensitization of high explosives according to claim 7, characterized in that: The actual density of the expanded pearlite powder is 0.1-0.4 g / cm 3 , particle size 15~75μm.

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