阅读说明：本技术 一种火***燃烧转爆轰动态过程的测试装置 (Testing device for dynamic process of converting combustion of explosives and powders into detonation ) 是由 秦钊 仪建华 王长健 赵凤起 许毅 孙志华 李海建 姜菡雨 郝宁 于 2019-09-03 设计创作，主要内容包括：本发明属于火炸药性能测试技术领域,具体涉及一种适用于发射药、推进剂和炸药能量释放过程的评价和分析的火炸药燃烧转爆轰动态过程的测试装置。该测试装置包括用于为火炸药燃烧转爆轰动态过程的测试提供连续单波长片光光源的光源模块、用于装填火炸药测试样品和放置点火药包并将点火药包的点火线引出的DDT管模块、用于记录DDT管模块中发生的火炸药燃烧转爆轰的动态过程的高速采集模块、点火电源模块,以及用于进行火炸药点火与数据采集的时序控制的数据存储与控制模块。与传统的碎片收集分析方法相比,该装置具备测量范围宽、功能多和安全性高等优点。(The invention belongs to the technical field of testing of explosive performance, and particularly relates to a testing device for a dynamic process of converting combustion of explosives and powders into detonation, which is suitable for evaluating and analyzing the processes of propellant powder, propellant and explosive energy release. The testing device comprises a light source module for providing a continuous single-wavelength sheet light source for testing a dynamic process of converting the burning of explosives and powders into the detonation, a DDT (distributed data transmission) tube module for loading testing samples of the explosives and powders, placing ignition powder bags and leading out ignition wires of the ignition powder bags, a high-speed acquisition module for recording the dynamic process of converting the burning of the explosives and powders into the detonation in the DDT tube module, an ignition power supply module and a data storage and control module for carrying out time sequence control on the ignition and data acquisition of the explosives and powders. Compared with the traditional fragment collection and analysis method, the device has the advantages of wide measurement range, multiple functions, high safety and the like.)

1. A testing device for dynamic process of converting combustion of explosives and powders into detonation is characterized by comprising a light source module, a DDT (double-diffused T) tube module, a high-speed acquisition module, an ignition power supply module and a data storage and control module; the light source module is used for providing a continuous single-wavelength sheet light source for testing a dynamic process of converting combustion of explosives and powders into detonation; the DDT pipe module is used for filling a gunpowder and explosive test sample, placing an ignition explosive bag and leading out an ignition wire of the ignition explosive bag; the high-speed acquisition module is used for recording a dynamic process of converting combustion of explosives and powders into detonation in the DDT pipe module; the ignition power supply module is a direct-current ignition power supply, and output electrodes of the ignition power supply module are respectively connected to two wiring terminals of an ignition explosive package through ignition wires; and the data storage and control module is used for carrying out time sequence control on ignition of the explosives and powders and data acquisition.

2. The test device of claim 1, wherein the light source module comprises a laser, a tripod, and a sheet light system; the laser is fixed on the tripod, and the emergent light of the laser forms a continuous single-wavelength sheet light source through the sheet light system.

3. The test device according to claim 2, wherein the laser has a wavelength of 532nm, a continuous light-emitting mode, a continuously adjustable light-emitting power, a maximum light-emitting power of 20W, and a sheet light spreading angle of 15 °; the tripod is 5m away from a DDT pipe in the DDT module, and the laser is fixed on the tripod; the height and angle of the tripod and the position of the laser are adjusted to make the laser just irradiate on the DDT tube.

4. The testing device of claim 1, wherein the DDT tube module comprises a rear plug, a DDT tube and a front plug, the rear plug is connected with the DDT tube by welding, the front plug is connected with the DDT tube by screw threads, and the front plug is provided with a through hole for passing an ignition wire for an ignition pack.

5. The test apparatus as claimed in claim 4, wherein the DDT tube is made of No. 45 steel, has a length of 0.9m and a wall thickness of 9 mm; the rear plug is a stainless steel disc with the diameter of phi 100mm multiplied by 10 mm; the front plug is a bolt with the diameter of M40 multiplied by 1.5mm, and a through hole with the diameter of 2mm is axially formed in the middle of the bolt and is used for leading an ignition wire for an ignition bag; a groove with the width of 9mm and the depth of 5mm is formed in the side of the front plug and is used for installing 4 symmetrical fastening bolts with the size of M8 multiplied by 1.5mm, so that the front plug is fixed at the head of the DDT pipe.

6. The test device of claim 1, wherein the high-speed acquisition module comprises a narrow-band filter system, a lens, and a high-speed camera; the lens is installed on the high-speed camera, and the narrow-band filtering system is installed at the front end of the lens.

7. The test apparatus of claim 6, wherein the center wavelength of the narrow band filtering system is 532 nm.

8. The test apparatus of claim 6, wherein the high speed camera has a photographing rate of 100000fps, an exposure time of 10us, and a photographing time of 10 s.

Technical Field

The invention belongs to the technical field of testing of explosive performance, and particularly relates to a testing device for a dynamic process of converting combustion of explosives and powders into detonation, which is suitable for evaluating and analyzing the processes of propellant powder, propellant and explosive energy release.

Background

To increase the energy level of explosives and powders, higher energy components are typically used. However, the use of these higher energy components carries the risk of increased mechanical and shock wave sensitivity and reduced safety of the explosives and powders. The performance of converting combustion into detonation of the explosives and powders is one of important parameters for safety design and evaluation, and has important guiding value for formula design, manufacture, transportation, use, storage and the like. The development of detonation from combustion of explosives and powders is a complex multi-stage chemical and physical process, the reaction speed can span multiple orders of magnitude in tens of microseconds, and the research on the unsteady process with such a large span is a challenge in both experimental technology and theoretical explanation, and particularly, the accurate determination of a plurality of critical turning points existing in the whole process change is extremely difficult.

The general means for characterizing the process of converting the combustion of explosives and powders into detonation is a combustion-to-detonation tube, namely a DDT tube, which is used for researching the combustion and detonation characteristics of the explosives and powders by arranging the explosives and powders in a closed tube. "experimental study of propellant combustion to detonation [ J ]. bulletin of explosives, 35 (4): 69-72 discloses a testing device for converting powder combustion into detonation, which is characterized in that a witness plate is additionally arranged below a DDT pipe, the DDT pipe and the witness plate are placed in a soil pit during testing, and then soil is covered. And collecting the witness plate and the steel pipe crisp after the test, and taking the damage degree of the witness plate and the steel pipe as a criterion for converting combustion into detonation. The method has no uniform standard for judging the DDT pipe with combustion tearing or detonation bursting, and human factors have great influence on the judgment of the result.

Disclosure of Invention

Technical problem to be solved

The invention provides a testing device for a dynamic process of converting combustion of explosives and powders into detonation, which aims to solve the technical problem of accurately testing the process of converting combustion of the explosives and powders into the detonation.

(II) technical scheme

In order to solve the technical problems, the invention provides a testing device for a dynamic process of converting combustion of explosives and powders into detonation, which comprises a light source module, a DDT (direct digital transmission) tube module, a high-speed acquisition module, an ignition power supply module and a data storage and control module; the light source module is used for providing a continuous single-wavelength sheet light source for testing a dynamic process of converting combustion of explosives and powders into detonation; the DDT pipe module is used for filling a gunpowder and explosive test sample, placing an ignition explosive bag and leading out an ignition wire of the ignition explosive bag; the high-speed acquisition module is used for recording a dynamic process of converting combustion of explosives and powders into detonation in the DDT pipe module; the ignition power supply module is a direct-current ignition power supply, and output electrodes of the ignition power supply module are respectively connected to two wiring terminals of an ignition explosive package through ignition wires; and the data storage and control module is used for carrying out time sequence control on ignition of the explosives and powders and data acquisition.

Further, the light source module comprises a laser, a tripod and a sheet light system; the laser is fixed on the tripod, and the emergent light of the laser forms a continuous single-wavelength sheet light source through the sheet light system.

Furthermore, the wavelength of the laser is 532nm, the light-emitting mode is continuous, the light-emitting power is continuously adjustable, the maximum light-emitting power is 20W, and the sheet light spreading angle is 15 degrees; the tripod is 5m away from a DDT pipe in the DDT module, and the laser is fixed on the tripod; the height and angle of the tripod and the position of the laser are adjusted to make the laser just irradiate on the DDT tube.

Furthermore, the DDT pipe module comprises a rear plug, a DDT pipe and a front plug, the rear plug is connected with the DDT pipe in a welding mode, the front plug is connected with the DDT pipe through threads, and a through hole for leading an ignition wire for an ignition bag is formed in the front plug.

Furthermore, the DDT pipe is made of No. 45 steel, the length is 0.9m, and the wall thickness is 9 mm; the rear plug is a stainless steel disc with the diameter of phi 100mm multiplied by 10 mm; the front plug is a bolt with the diameter of M40 multiplied by 1.5mm, and a through hole with the diameter of 2mm is axially formed in the middle of the bolt and is used for leading an ignition wire for an ignition bag; a groove with the width of 9mm and the depth of 5mm is formed in the side of the front plug and is used for installing 4 symmetrical fastening bolts with the size of M8 multiplied by 1.5mm, so that the front plug is fixed at the head of the DDT pipe.

Further, the high-speed acquisition module comprises a narrow-band filtering system, a lens and a high-speed camera; the lens is installed on the high-speed camera, and the narrow-band filtering system is installed at the front end of the lens.

Further, the center wavelength of the narrow-band filtering system is 532 nm.

Further, the photographing rate of the high-speed camera is 100000fps, the exposure time is 10us, and the photographing time is 10 s.

(III) advantageous effects

The invention provides a testing device for dynamic process of converting burning of explosives and powders into detonation, which comprises a light source module for providing a continuous single-wavelength sheet light source for testing the dynamic process of converting burning of explosives and powders into detonation, a DDT (distributed double-layer transistor) tube module for loading a testing sample of the explosives and powders, placing an ignition explosive package and leading out an ignition wire of the ignition explosive package, a high-speed acquisition module for recording the dynamic process of converting burning of the explosives and powders into detonation, an ignition power module and a data storage and control module for carrying out time sequence control on ignition and data acquisition of the explosives and powders.

Compared with the traditional fragment collection and analysis method, the device has the advantages of wide measurement range, multiple functions, high safety and the like.

The beneficial effects of the invention specifically comprise:

1. The device has the advantages that laser with good monochromaticity is used as a light source for light supplement, a narrow-band light filtering system is used for filtering all light rays except the laser wavelength band emitted in the process of burning/explosion energy release of the explosives and powders, the dynamic processes of expansion, tearing and explosion of the DDT tube in the process of burning to detonation of the explosives and powders in the DDT tube are recorded by means of a high-speed camera, and therefore the whole dynamic process of burning to detonation of the explosives and powders is obtained.

2. The device need not to install the board of witnessing below the DDT pipe, also need not to pack into closely after the explosive in the DDT pipe and carry out the operation of filling soil, has saved the required time of experiment, has also improved experimental security simultaneously.

3. The device controls the time sequence of ignition and data acquisition through the data storage and control module, and the propagation velocity of combustion waves and detonation waves can be calculated according to the recorded dynamic process in the later stage, so that the device has the characteristic of multiple functions.

Drawings

FIG. 1 is a schematic structural diagram of a testing device for dynamic process of converting combustion of explosives and powders into detonation.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The embodiment provides a device for testing a dynamic process of converting combustion of explosives and powders into detonation, and the structure of the device is shown in fig. 1. The testing device comprises a light source module 1, a DDT tube module 2, a high-speed acquisition module 3, an ignition power supply module 4 and a data storage and control module 5.

The light source module 1 is composed of a power supply, a laser, a tripod and a sheet light system and is mainly used for providing a continuous single-wavelength sheet light source for testing a dynamic process of converting combustion of explosives and powders into detonation. In this embodiment, the wavelength of the laser is 532nm, the light-emitting mode is continuous, the light-emitting power is continuously adjustable, the maximum light-emitting power is 20W, and the spreading angle of the sheet light is 15 °. The distance between the tripod and the DDT tube is about 5m, and the laser is fixed on the tripod; the height and angle of the tripod and the position of the laser are adjusted to make the laser just irradiate on the DDT tube.

The DDT pipe module 2 consists of a rear plug, a DDT pipe and a front plug, the rear plug is connected with the DDT pipe in a welding mode, and the front plug is connected with the DDT pipe through threads. In this embodiment, the DDT tube is made of 45 # steel, the length is 0.9M, the wall thickness is 9mm, the rear plug is a stainless steel disc with the diameter of 100mm × 10mm, the explosive and powder sample is filled in the DDT tube, the ignition explosive cartridge is tightly attached to the explosive and powder sample and placed on one side of the front plug of the ignition end, the front plug of the ignition end is a bolt with the diameter of M40 × 1.5mm, and a through hole with the diameter of 2mm is axially formed in the middle of the bolt for passing through an ignition wire for the ignition cartridge; a groove with the width of 9mm and the depth of 5mm is formed on the side of the front plug and is used for installing 4 symmetrical fastening bolts with the size of M8 multiplied by 1.5mm, so that the fastening bolts are fixed on the head of the DDT pipe.

The high-speed acquisition module 3 consists of a narrow-band filtering system, a lens and a high-speed camera and is mainly used for recording the dynamic process of converting the combustion of the explosives and the powders into the detonation. The narrow-band filtering system only allows light with the wavelength of the laser light source band in the light source module to pass through. In this embodiment, the center wavelength of the narrow-band filtering system used by the high-speed acquisition module 3 is 532nm, and the model of the high-speed camera is photon FASTCAM SA 1.1.1.

The ignition power supply module 4 is a direct current ignition power supply, and output electrodes of the ignition power supply module are respectively connected to two wiring terminals of an ignition explosive package through ignition wires.

The data storage and control module 5 consists of a computer and program control software, and the program control software can realize the time sequence control of ignition of the explosives and powders and data acquisition. In this embodiment, the photographing rate of the high-speed camera is 100000fps, the exposure time is 10us, the photographing time is 10s, and the ignition charge ignition and the data acquisition of the high-speed camera are synchronously started.

The use method of the test device comprises the following steps:

The first step is as follows: and (3) loading the weighed explosive testing sample and the ignition charge into a DDT (distributed double-layer transistor) tube, installing a front plug on the DDT tube, and then connecting the ignition charge to a binding post of an ignition power supply module through an ignition wire.

The second step is that: turning on the light source module, adjusting the position and angle of the optical system to ensure that the DDT tube to be photographed is fully illuminated.

The third step: and selecting a proper lens to be installed on the high-speed camera, opening the high-speed camera, adjusting and selecting proper photographing resolution, speed, exposure time and acquisition time, and focusing to the outer wall of the DDT pipe.

The fourth step: the narrow-band filtering system is arranged at the front end of the lens.

The fifth step: and adjusting and setting the time sequence of ignition and data acquisition.

And a sixth step: ignition and data acquisition are controlled by program control software in the data storage and control module.

The seventh step: and viewing and analyzing the dynamic process of converting the combustion of the explosive into the detonation on the computer.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.