A multi-fragment abort combustor for combustible cartridges

Abstract

The application discloses a multi-fragment combustion interrupter for combustible cartridges, characterized in that the combustion interrupter comprises a multi-stage nozzle, a speed control fragment, a pressure control fragment, a body, an ablation cage, a combustible cartridge fragment and a screw plug; the ablation cage is adopted, the combustible cartridge fragment is placed in the ablation cage, most of the combustible cartridge fragments after combustion interruption can be collected, and the sample amount obtained is increased; the structure of the equal-diameter nozzle is adopted, the surface morphology of the combustible cartridge fragment can be well preserved; the multi-fragment structure is adopted, the movement speed of the ablation cage can be controlled, and the stability of combustion process extinguishing can be ensured by adjusting the thickness, spacing and number of the fragments. The application solves the problems of mechanical damage and sample collection when the energetic substance is sprayed in the combustion interrupter, and further improves the fine diagnosis of the combustion process of the energetic substance.

Description

Technical Field

[0001] This invention relates to the field of combustible cartridge combustion technology, and more particularly to a burn-stopping device, specifically a structure with a large opening size and composed of multiple fragments, which enables the structure of the combustible cartridge to remain intact after pressure breaks through the fragments, thereby characterizing the combustion process of the combustible cartridge. Background Technology

[0002] A burn-off interrupter is a pressure vessel with a semi-closed structure. When gunpowder burns inside, the pressure generated reaches the shear force of the fragments, causing the fragments to be sheared and the gunpowder to be ejected from the nozzle. Due to the sudden pressure relief, the combustion process of the gunpowder is stopped. The surface morphology of the gunpowder obtained at this time retains the information of the combustion process. Interrupting burners are generally used to study the combustion process of energetic materials such as propellants and combustible cartridges. Due to their structural characteristics, when energetic materials are ejected from a semi-enclosed burner, they are often damaged by the edge of the nozzle, resulting in some particles having a mechanically damaged structure. On the other hand, after the particles are ejected directly from the nozzle, they collide with the ground or wall, and some of the collected particles are damaged due to the impact. Therefore, existing interrupting burners have the following problems: (1) After the particles are ejected from the nozzle, there is no effective protection, and they are directly damaged by impact with the ground or wall; (2) The diameter of the nozzle is smaller than the diameter of the semi-enclosed container, and when the particles are ejected from the container, they will collide with the constricted part, and the particles will be mechanically damaged; (3) After the fragments are sheared, the pressure difference is large, the movement speed of the particles is fast, and the proportion of damage caused by impact is large. However, it is crucial to study the combustion characteristics of energetic materials under different pressures. To accurately obtain the morphology of the particle surface after interrupting combustion, it is impossible to achieve this through existing technical means.

[0003] Based on the technical data retrieved so far, there is no known burn-out device that uses a large opening size and a multi-fragment structure to ensure that the propellant particles maintain an intact surface morphology after being ejected from the nozzle. Summary of the Invention

[0004] To address the shortcomings or deficiencies of existing burnout interrupters, the present invention aims to provide a multi-fragment burnout interrupter for combustible cartridges. Specifically, this burnout interrupter employs an ablation cage, a nozzle of equal diameter, and a multi-fragment structure. By placing combustible cartridge fragments in the ablation cage for combustion, and using the equal-diameter nozzle to allow the ablation cage to be ejected entirely from a semi-enclosed container, the multi-fragment structure allows for control of the ejection velocity. By adjusting the above parameters, combustible cartridge fragments with intact surface morphology can be obtained after being ejected from the nozzle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-fragment burn-out stopper for combustible cartridges, characterized in that it comprises a multi-stage nozzle, a speed-controlled fragment, a pressure-controlled fragment, a body, an ablation cage, combustible cartridge fragments, and a screw plug;

[0007] The multi-stage nozzle has a trumpet-shaped structure. The interior is generally trumpet-shaped, and the exterior is cylindrical. It is composed of multiple segments, with a groove between each pair of segments. The segments are connected by threads. The rightmost segment has grooves on both the left and right ends and is connected to the body by threads.

[0008] The speed-controlling fragment is a disc-shaped structure made of copper, and its size matches the groove of the multi-stage nozzle. It is placed in the groove of the multi-stage nozzle.

[0009] The pressure-controlled fragment is a disc-shaped structure made of copper and is placed in the groove between the rightmost end of the multi-stage nozzle and the body.

[0010] The main body is a cylindrical structure, with one end connected to the rightmost end of the multi-stage nozzle via a thread, and the other end sealed with a screw plug.

[0011] The ablation cage is a cylindrical cage structure made of woven steel wire. Its external dimensions are slightly smaller than the internal dimensions of the main body. It is placed inside the main body, and the combustible explosive cartridge is placed inside the ablation cage.

[0012] The combustible cartridge has a sheet-like structure. The combustible cartridge is cut into a rectangular shape of a certain size and placed inside the ablation cage.

[0013] The screw plug has a cylindrical structure and is used to seal the body;

[0014] By assembling the above components in sequence, a multi-fragment burner for combustible cartridges is obtained.

[0015] The multi-fragment burner for combustible cartridges of the present invention has the following advantages compared with the prior art:

[0016] (1) By adopting the structure of an ablation cage, and placing the combustible cartridge inside the ablation cage, the combustible cartridge can be ejected as a whole from the nozzle without affecting combustion, thus collecting most of the combustible cartridge after combustion has ceased, increasing the amount of sample obtained. Compared with the prior art, it is possible to collect most of the relatively complete samples without affecting the combustion performance of the combustible cartridge.

[0017] (2) The use of a nozzle of equal diameter ensures that the ablation cage will not be mechanically damaged during movement, thus preserving the surface morphology of the combustible propellant tube. Compared with existing technologies, this design prevents the combustion material in the propellant from being mechanically damaged during the ejection process, thereby preserving rich surface information during combustion and eliminating the influence of mechanical damage.

[0018] (3) By adopting a multi-fragment structure, the controllable movement speed of the ablation cage and the stability of the combustion process can be ensured by adjusting the thickness, spacing and number of the fragments. Compared with the existing technology, it can regulate the combustion and extinguishing processes of the sample and control the movement speed of the sample, which greatly improves the accuracy of combustion process diagnosis and fills the gap in the existing technology.

[0019] Therefore, this invention solves the problems of mechanical damage and sample collection when energetic substances are ejected from the burner, and further improves the precision diagnosis of the energetic substance combustion process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the composition of the multi-fragment burner for combustible cartridges of the present invention.

[0021] Figure 2 yes Figure 1 Sectional view along direction A. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and the embodiments provided by the inventors.

[0023] like Figure 1 , Figure 2 As shown in the figure, this embodiment provides a preferred structure for a multi-fragment burner for combustible cartridges, including a multi-stage nozzle 1, a speed-controlling fragment 2, a pressure-controlling fragment 3, a body 4, an ablation cage 5, combustible cartridge fragments 6, and a screw plug 7.

[0024] The multi-stage nozzle 1 has a trumpet-shaped structure, with an overall trumpet-shaped interior and a cylindrical exterior. It is made of 45# steel and has dimensions of Φ120mm×160mm. It consists of two segments. The first segment has an inner diameter of Φ80mm at the left end and a length of 100mm, and an inner diameter of Φ60mm at the right end. The second segment has an inner diameter of Φ58mm at the left end and a length of 60mm, and an inner diameter of Φ50mm at the right end. A groove with dimensions of Φ80mm×0.5mm is left between the first and second segments. The first and second segments are connected by threads. A groove with dimensions of Φ70mm×1mm is left between the second segment and the body 4. The first and second segments together form the multi-stage nozzle 1. The rightmost end of the multi-stage nozzle 1 is connected to the body 4 by threads.

[0025] The speed-controlling fragment 2 is a disc-shaped structure made of copper, with a size of Φ80mm×0.5mm. It is placed in the grooves of the first and second sections of the multi-stage nozzle 1 and is pressed together by threads.

[0026] The pressure-controlled fragment 3 is a disc-shaped structure made of copper, with a size of Φ70mm×1mm. It is placed in the groove between the rightmost end of the multi-stage nozzle 1 and the body 4 and is pressed tightly by threads.

[0027] The main body 4 is a cylindrical structure made of No. 45 steel, with dimensions of Φ50mm×200mm and a wall thickness of 30mm. It has a Φ30mm through hole at the right end, and the left end is connected to the rightmost end of the multi-stage nozzle 1 by a thread. The right end is sealed with a screw plug 7.

[0028] The ablation cage 5 is a cylindrical cage structure made of woven steel wire with a diameter of Φ0.5mm. The mesh size after forming is 4mm×4mm, and the overall dimensions are Φ45mm×180mm. It is placed in the body 4, and the combustible explosive tube 6 is placed inside the ablation cage 5.

[0029] The combustible cartridge 6 has a sheet-like structure, and the material is a rolled combustible cartridge, cut into a shape of 10mm×50mm, and placed inside the ablation cage 5;

[0030] The plug 7 is a cylindrical structure made of No. 45 steel, with dimensions of Φ30mm×50mm, and it seals the body 4 through threads;

[0031] By assembling the above components in sequence, a multi-fragment burner for combustible cartridges is obtained. By adjusting the thickness, number, and size of the speed-controlling fragments 2, and the orifice size 8 of the ablation cage 5, the combustion and extinguishing processes of the combustible cartridge fragments 6 can be controlled, greatly improving the accuracy of its combustion process diagnosis.

[0032] A 20-gram combustible cartridge 6 is placed in the ablation cage 5. Upon ignition, the cartridge 6 generates a large amount of gas, causing a rapid increase in pressure. When the pressure reaches the shear pressure of the pressure-controlled fragment 3, it ruptures. The ablation cage 5, along with the combustible cartridge 6, moves together. At this point, the pressure exceeds the shear pressure of the velocity-controlled fragment 2, causing it to rupture. The ablation cage 5, along with the combustible cartridge 6, is ejected from the burnout interrupter and the flameout is extinguished. Finally, the burnout interruption sample of the combustible cartridge 6, with its complete morphological characteristics, is preserved in the ablation cage 5.

Claims

1. A multi-fragment burner for combustible cartridges, characterized in that, It includes a multi-stage nozzle (1), a velocity-controlled fragment (2), a pressure-controlled fragment (3), a body (4), an ablation cage (5), a combustible cartridge (6), and a screw plug (7); The multi-stage nozzle (1) has a trumpet-shaped structure. The interior is generally trumpet-shaped and the exterior is cylindrical. It is composed of multiple segments. There is a groove between every two segments. The segments are connected by threads. The rightmost segment has grooves on both the left and right ends and is connected to the body (4) by threads. The speed-controlling fragment (2) is a disc-shaped structure made of copper. Its size matches the groove of the multi-stage nozzle (1) and it is placed in the groove of the multi-stage nozzle (1). The pressure-controlled fragment (3) is a disc-shaped structure made of copper and is placed in the groove between the rightmost end of the multi-stage nozzle (1) and the body (4). The main body (4) is a cylindrical structure, with one end connected to the rightmost end of the multi-stage nozzle (1) by a thread, and the other end sealed with a screw plug (7); The ablation cage (5) is a cylindrical cage structure made of steel wire. Its external dimensions are slightly smaller than the internal dimensions of the main body. It is placed in the main body (4), and the combustible explosive tube (6) is placed inside the ablation cage (5). The combustible cartridge (6) has a sheet-like structure. The combustible cartridge is cut into a rectangular shape of a certain size and placed inside the ablation cage (5). The plug (7) is a cylindrical structure used to seal the body (4).

2. The multi-fragment burner for combustible cartridges according to claim 1, characterized in that, It also includes a multi-stage nozzle (1) with a trumpet-shaped structure. The interior is generally trumpet-shaped and the exterior is cylindrical. The material is No. 45 steel and the size is Φ120mm×160mm. It is composed of N=2 (N=2, 4, 5...) segments. The inner diameter of the left end of the first segment is Φ80mm and the length is 100mm. The inner diameter of the right end is Φ60mm. The inner diameter of the left end of the second segment is Φ58mm and the length is 60mm. The inner diameter of the right end is Φ50mm. There is a groove between the first and second segments. The size of the groove is Φ80mm×0.5mm. The first and second segments are connected by threads. There is a groove between the second segment and the body (4). The size of the groove is Φ70mm×1mm. The multi-stage nozzle (1) is composed of N (N=2, 4, 5...) segments. The rightmost end of the multi-stage nozzle (1) is connected to the body (4) by threads.

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