阅读说明：本技术 一种测试含能材料跌落实验的分离装置 (Separation device for drop test of energetic materials ) 是由 徐森 张岩 张亮 王继 刘大斌 钱华 于 2020-11-19 设计创作，主要内容包括：本发明公开一种测试含能材料跌落实验的分离装置,涉及含能材料实验技术领域,包括活塞套、活塞、压帽、药室、爆炸组件、第一吊环、第二吊环和多个剪切销钉,活塞和压帽分别安装于活塞套的两端,药室设置于活塞套中,爆炸组件设置于药室中,活塞一端套设于活塞套中,活塞另一端与第一吊环固定连接,活塞与活塞套之间设置有密封组件,活塞上设置有环形限位槽,各剪切销钉穿过活塞套外壁并抵接于环形限位槽中,压帽一端与活塞套固定连接,压帽另一端与第二吊环固定连接。本发明提供的测试含能材料跌落实验的分离装置承载重量大,分离时间短,安全性好,可靠性高,实验精度高。(The invention discloses a separating device for testing drop experiments of energetic materials, which relates to the technical field of energetic material experiments and comprises a piston sleeve, a piston, a pressing cap, a medicine chamber, an explosion assembly, a first lifting ring, a second lifting ring and a plurality of shearing pins. The separating device for testing the energetic material drop test provided by the invention has the advantages of large bearing weight, short separating time, good safety, high reliability and high test precision.)

1. The utility model provides a separation device that test energetic material fell experiment, its characterized in that, includes piston sleeve, piston, pressure cap, explosive chamber, explosion subassembly, first rings, second rings and a plurality of shearing pin, the piston with press the cap to install respectively in the both ends of piston sleeve, the explosive chamber set up in the piston sleeve, explosion subassembly set up in the explosive chamber, a piston pot head is located in the piston sleeve, the piston other end with first rings fixed connection, the piston with be provided with seal assembly between the piston sleeve, be provided with annular spacing groove on the piston, each the shearing pin passes piston sleeve outer wall and butt in the annular spacing groove, press cap one end and piston sleeve fixed connection, press the cap other end with second rings fixed connection.

2. The separation device for the drop test of the energetic materials as claimed in claim 1, wherein one end of the piston, which is far away from the piston sleeve, is provided with a first stud which passes through the side wall of the first hanging ring and is fastened by a first nut.

3. The separation device for testing drop experiments of energetic materials as claimed in claim 1, wherein the sealing assembly comprises two sealing rings, the piston is provided with two annular mounting grooves which are respectively arranged at two sides of the annular limiting groove, and one sealing ring is arranged in each annular mounting groove.

4. The separation device for drop experiments of energetic materials as claimed in claim 1, wherein said explosive assembly comprises an igniter and a pyrotechnic charge, both disposed in said chamber, said pyrotechnic charge disposed near one end of said piston.

5. The separation device for drop experiments of energetic materials as claimed in claim 4, wherein a guiding cylinder is arranged at one end of the medicine chamber close to the pressing cap, the guiding cylinder penetrates through the pressing cap to extend to the outside, and the conducting wire of the igniter extends to the outside through the guiding cylinder.

6. The separation device for testing the drop test of the energetic materials as claimed in claim 5, wherein one end of the pressing cap is installed in the piston sleeve in a threaded manner, the other end of the pressing cap is provided with a second stud, the second stud penetrates through the side wall of the second hanging ring and is fastened by a second nut, and the guide cylinder penetrates through the second stud and extends to the outside.

7. The separation device for drop experiments of tested energetic materials as claimed in claim 5, wherein the igniter is an HBD-1 electric igniter tube and the gunpowder is BPN tablets.

8. The separation device for the drop test of the energetic materials as claimed in claim 1, wherein a plurality of grooves are uniformly arranged on the outer wall of the piston sleeve along the circumferential direction, and one shear pin is arranged in one groove.

Technical Field

The invention relates to the technical field of energetic material experiments, in particular to a separating device for testing energetic material drop experiments.

Background

During production, storage, transportation and use of energetic materials, the materials cannot be completely prevented from being subjected to accidental stimulation such as falling, impact and the like, and in order to investigate the sensitivity of the energetic materials under the stimulation such as falling, impact and the like and the reasonability of shell design, a falling experiment is often required. The packaged energetic material is generally freely dropped at a certain height to impact a hard surface, the reaction grade of a drop test is determined according to the charge reaction condition, the perforation and deformation of the hard surface and the like, and a basis is provided for evaluating the safety of the energetic material and formulating a crisis treatment plan of the energetic material under the condition of falling stimulation.

Drop experiments can be carried out by using a drop hammer experiment machine provided with guide rails so as to control the sliding direction of ammunition, but the experiments are often limited by the space between the guide rails, and many large ammunition cannot be tested; the method of releasing the energetic material by hands after the energetic material is lifted to a certain height by manual operation has high danger, low efficiency, large uncertainty and rough experimental results. The existing drop test machine generally adopts the modes of electromagnet power-off, detonator rope blasting and plate turning, but residual magnetism is always left when the electromagnet is powered off, so that the energetic material is unevenly stressed at the moment of release, overturns are generated, and the drop posture is difficult to ensure; the detonator rope blasting mode has requirements on the thick and thin materials of the rope, the thin rope has limited bearing capacity and cannot bear large ammunition, and the thick rope cannot be blasted by the detonator; the adoption of the turning plate mode causes the energetic material to generate other movements along with the turning of the turning plate instead of pure free falling, and the impact posture is difficult to control, thereby influencing the precision of the experiment.

Disclosure of Invention

In order to solve the technical problems, the invention provides the separating device for the drop test of the energetic material, which has the advantages of large bearing weight, short separating time, good safety, high reliability and high test precision.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a separating device for drop tests of energetic materials, which comprises a piston sleeve, a piston, a pressing cap, a medicine chamber, an explosion assembly, a first lifting ring, a second lifting ring and a plurality of shearing pins, wherein the piston and the pressing cap are respectively arranged at two ends of the piston sleeve, the medicine chamber is arranged in the piston sleeve, the explosion assembly is arranged in the medicine chamber, one end of the piston is sleeved in the piston sleeve, the other end of the piston is fixedly connected with the first lifting ring, a sealing assembly is arranged between the piston and the piston sleeve, an annular limiting groove is arranged on the piston, each shearing pin penetrates through the outer wall of the piston sleeve and abuts against the annular limiting groove, one end of the pressing cap is fixedly connected with the piston sleeve, and the other end of the pressing cap is fixedly connected with the second lifting ring.

Preferably, one end of the piston, which is far away from the piston sleeve, is provided with a first stud, and the first stud penetrates through the side wall of the first hanging ring and is fastened by a first nut.

Preferably, the sealing assembly includes two sealing rings, two annular mounting grooves are provided on the piston, the two annular mounting grooves are respectively provided on two sides of the annular limiting groove, and one sealing ring is provided in each annular mounting groove.

Preferably, the explosive assembly comprises an igniter and a pyrotechnic charge, both disposed in the chamber, the pyrotechnic charge disposed proximate an end of the piston.

Preferably, one end of the medicine chamber close to the pressing cap is provided with a guide cylinder, the guide cylinder penetrates through the pressing cap and extends to the outside, and a lead of the igniter extends to the outside through the guide cylinder.

Preferably, one end of the pressing cap is installed in the piston sleeve in a threaded manner, the other end of the pressing cap is provided with a second stud, the second stud penetrates through the side wall of the second hanging ring and is fastened by a second nut, and the guide cylinder penetrates through the second stud and extends to the outside.

Preferably, the igniter is an HBD-1 electric igniter tube, and the gunpowder is BPN tablets.

Preferably, a plurality of grooves are uniformly formed in the outer wall of the piston sleeve along the circumferential direction, and one shear pin is installed in one groove.

Compared with the prior art, the invention has the following technical effects:

the invention provides a separating device for testing drop experiments of energetic materials, which comprises a piston sleeve, a piston, a pressing cap, a medicine chamber, an explosion component, a first lifting ring, a second lifting ring and a plurality of shearing pins. During operation, the first rings are connected with an experimental sample, the second rings are connected with the suspension platform, the explosive assembly is ignited, high-temperature and high-pressure gas generated after the explosive assembly burns pushes the piston to cut off the shearing pin, the piston continues to move under the action of pressure, the purpose of separating from the piston sleeve is achieved, and the experimental sample can freely fall off. The device has the advantages of large axial tension load, bearing weight of more than 1000kg, short separation time of less than 100ms, only two sections of the device during the action, no explosion and cracking of products, no large fragment, no experiment interference of a large amount of smoke and dust, good safety and high reliability, and the reaction conditions of the tested explosive charge and verification board well show the safety characteristic and the reaction characteristic of an experimental sample when the experimental sample is stimulated by free falling, thereby ensuring the precision of the experiment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a separation device for drop test of energetic materials provided by the invention;

FIG. 2 is a cross-sectional view of a separation device for drop test of energetic materials provided by the present invention;

fig. 3 is a schematic structural diagram of an igniter in the separation device for drop test of energetic materials, provided by the invention.

Description of reference numerals: 1. a piston sleeve; 2. a piston; 3. pressing the cap; 4. shearing the pin; 5. a seal ring; 6. a first hanging ring; 7. a first nut; 8. a medicine chamber; 9. an igniter; 10. gunpowder; 11. a guide cylinder; 12. a wire; 13. a second hoisting ring; 14. a second nut; 15. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a separating device for testing drop experiments of energetic materials, which has the advantages of large bearing weight, short separating time, good safety, high reliability and high experiment precision.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1-3, the embodiment provides a separation device for drop tests of energetic materials, which includes a piston sleeve 1, a piston 2, a pressing cap 3, a medicine chamber 8, an explosion component, a first lifting ring 6, a second lifting ring 13 and a plurality of shearing pins 4, wherein the piston 2 and the pressing cap 3 are respectively installed at two ends of the piston sleeve 1, the medicine chamber 8 is arranged in the piston sleeve 1, the explosion component is arranged in the medicine chamber 8, one end of the piston 2 is sleeved in the piston sleeve 1, the other end of the piston 2 is fixedly connected with the first lifting ring 6, the first lifting ring 6 is used for connecting an experimental sample, a sealing component is arranged between the piston 2 and the piston sleeve 1, an annular limiting groove is arranged on the piston 2, each shearing pin 4 penetrates through the outer wall of the piston sleeve 1 and abuts against the annular limiting groove, and the piston 2 is axially limited by the matching of the shearing pin 4 and the annular limiting; one end of the pressing cap 3 is fixedly connected with the piston sleeve 1, the other end of the pressing cap 3 is fixedly connected with the second hanging ring 13, and the second hanging ring 13 is used for being connected with a hanging platform. When the explosion assembly works, high-temperature and high-pressure gas generated after the explosion assembly is ignited pushes the piston 2 to shear the shearing pin 4, and the piston 2 is axially limited by contact, so that the piston 2 is separated from the piston sleeve 1.

Specifically, one end of the piston 2, which is far away from the piston sleeve 1, is provided with a first stud, and the first stud passes through the side wall of the first hanging ring 6 and is fastened by a first nut 7, so that the fixed connection between the piston 2 and the first hanging ring 6 is realized.

The sealing assembly in this embodiment includes two sealing washer 5, is provided with two annular mounting grooves on the piston 2, and two annular mounting grooves set up respectively in the both sides of annular spacing groove, are provided with a sealing washer 5 in each annular mounting groove, realize airtight powder charge environment through setting up sealing washer 5.

Specifically, a plurality of grooves 15 are uniformly formed in the outer wall of the piston sleeve 1 along the circumferential direction, and one shear pin 4 is installed in one groove 15.

The explosive assembly comprises an igniter 9 and a gunpowder 10, both the igniter 9 and the gunpowder 10 being disposed in the chamber 8, the gunpowder 10 being disposed adjacent one end of the piston 2. One end of the medicine chamber 8 close to the pressing cap 3 is provided with a guiding cylinder 11, the guiding cylinder 11 penetrates through the pressing cap 3 to extend to the outside, and a lead 12 of the igniter 9 extends to the outside through the guiding cylinder 11.

One end of the pressing cap 3 is installed in the piston sleeve 1 in a threaded mode, the other end of the pressing cap 3 is provided with a second stud, the second stud penetrates through the side wall of the second hanging ring 13 and is fastened by a second nut 14, and therefore the pressing cap 3 is fixedly connected with the second hanging ring 13. The guiding cylinder 11 extends to the outside through the second stud, that is, the guiding cylinder 11 extends from one end of the medicine chamber 8 to the pressing cap 3 and sequentially passes through the pressing cap 3 and the second stud to the outside, so that the lead 12 of the igniter 9 extends out of the end face of the second stud.

In this embodiment, the first stud and the second stud both use common coarse threads, and the thread strength meets the design requirements by performing strength check calculation on the weak link.

In this embodiment, the igniter 9 is an HBD-1 electric squib, as shown in FIG. 3. The igniter 9 needs to meet the requirement of no ignition at 1A/1W/5min in GJB344A-2005 general Specification for insensitive electric initiators, a mature product HBD-1 electric igniter is selected, the function is reliable, and the HBD-1 electric igniter is mainly used for igniting the main charge of an engine or an initiating explosive device.

In this embodiment, the gunpowder 10 is a BPN tablet, the BPN tablet meeting the requirements of the specification of GJB 6217-.

In the embodiment, the shear pin 4 is made of 20CrNiMo steel, the shear strength is about 520Mpa, and the performance is stable and can meet the requirements. The piston sleeve 1 is made of T10 steel and is quenched, and the bearing strength of the piston sleeve is calculated to be far greater than that of the shear pin 4, so that the piston sleeve can meet the requirements. The piston 2 is made of T10 steel and is quenched, so that the requirement of shear strength can be met.

During operation, the first lifting ring 6 is connected with an experimental sample, the second lifting ring 13 is connected with the suspension platform, the igniter 9 is ignited by a direct current power supply, the gunpowder 10 is ignited after the igniter 9 acts, high-temperature and high-pressure gas generated after the gunpowder 10 burns pushes the piston 2 to cut off the shearing pin 4, the piston 2 continues to move under the action of pressure, the purpose of separating from the piston sleeve 1 is achieved, and the experimental sample can freely fall off. The device in the embodiment has the advantages that the axial tension load is large, the weight can be borne by the device is more than 1000kg, large ammunition can be borne, the separation time is short and is less than 100ms, the device is only divided into two sections during acting, pure free falling can be guaranteed, products are not cracked, large fragments and a large amount of smoke interference experiments are avoided, the safety is good, the reliability is high, the reaction conditions of the explosive charge and verification board obtained through testing well show the safety characteristic and the reaction characteristic of an experimental sample when the experimental sample is stimulated to freely fall, and the experiment precision is guaranteed.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.