CN109579644B

CN109579644B - But continuous adjustment's clearance ignition testing arrangement

Info

Publication number: CN109579644B
Application number: CN201811290612.3A
Authority: CN
Inventors: 张文超; 郑子龙; 秦志春; 田桂蓉; 叶家海; 吴刚刚; 胡斌; 陈俊宏
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-11-13
Anticipated expiration: 2038-10-31
Also published as: CN109579644A

Abstract

The invention discloses a continuously adjustable gap ignition test device, which comprises a test structure, an igniter, a to-be-ignited medicament, an inner sleeve and a fixing nut, wherein the igniter, the to-be-ignited medicament, the inner sleeve and the fixing nut are arranged in a shell, the fixing nut is arranged at the top of the shell and used for fixing the inner sleeve and the shell, and the to-be-ignited medicament is arranged in the inner sleeve; the igniter is placed at the bottom of the shell, the bottom end face of the inner sleeve is tightly attached to the top end face of the igniter, a to-be-ignited medicament is pressed in the inner sleeve, and the distance between the lower surface of the to-be-ignited medicament and the bottom end face of the inner sleeve is the gap ignition distance h; the device also comprises a pressing die for adjusting the distance h of the ignited medicament in the gap of the inner sleeve. The testing device controls the ignition distance of the gap through the rotation of the screw thread, the gap can be continuously adjusted, the precision is higher, and the pressure resistance of the die is good.

Description

But continuous adjustment's clearance ignition testing arrangement

Technical Field

The invention belongs to the field of igniter performance testing, and particularly relates to a gap ignition testing device capable of being continuously adjusted.

Background

The igniter is used for converting input energy into heat energy so as to ignite the initiating explosive agent contacted with the igniter, and whether the initiating explosive agent can be reliably ignited or not is an important index for considering the performance of the initiating explosive device.

At present, no means for directly characterizing the ignition capability of an igniter exists, and in a patent 'MEMS initiating explosive device transducer element ignition capability testing device' (107702602A), an igniter is used for igniting a ignited medicament under a certain gap, and the ignition capability of the igniter is indirectly characterized according to the distance for reliably igniting the ignited medicament. However, in the implementation process of the method, the size of the gap is adjusted by the fixed positioning column, and the gap cannot be continuously adjusted, so that the application of the testing device is limited.

Disclosure of Invention

The invention aims to provide a gap ignition testing device capable of continuously adjusting the size of a gap.

The technical solution for realizing the purpose of the invention is as follows:

the utility model provides a clearance ignition testing arrangement that can adjust in succession, includes some firearm, is hit medicament, shell, inner skleeve, fixation nut and pressing die utensil, and some firearm is placed in the shell bottom, and the top terminal surface of some firearm is hugged closely to the bottom terminal surface of inner skleeve, and the pressure equipment is hit the medicament in the inner skleeve, is the distance that the clearance was igniteed by the distance of some medicament lower surface and inner skleeve bottom terminal surface, and the screw thread in the accessible pressing die utensil is adjusted the post accuracy and is adjusted.

Preferably, the pressing die comprises a die base, a thread fixing column, a thread adjusting column, a protective cylinder, an inner sleeve and a punch, the distance h of the thread adjusting column extending out of the thread fixing column can be continuously and accurately adjusted through thread matching, and the adjusting range is 0-20 mm.

Preferably, the thread pitch of the external thread of the thread adjusting column and the internal thread of the thread fixing column is greater than 1mm, so that the thread deformation phenomenon can not occur when the thread adjusting column bears the pressure of the pressurized explosive.

Preferably, the distance h between the thread adjusting column and the thread fixing column can be measured and controlled by a vernier caliper, and the adjusting precision is more than 0.1 mm.

Preferably, the depth of the concave pit of the die base is more than 30mm, so that the threaded adjusting column can be completely placed in the concave pit of the die base when h is 0.

Compared with the prior art, the invention has the following remarkable advantages:

1. the invention controls the ignition distance of the gap through the rotation of the screw thread, and the gap can be continuously controlled;

2. the invention can use the vernier caliper to measure the extending distance of the thread adjusting column, and has higher precision;

3. the thread pitch used by the invention is more than 1mm, and the pressure resistance is better.

Drawings

FIG. 1 is a schematic diagram of a gap ignition test apparatus according to the present invention.

FIG. 2 is a schematic structural view of the pressing mold of the present invention.

Fig. 3 is a schematic view of the screw fixing post and the screw adjusting post of the present invention.

Wherein 1 is an igniter; 2 is a dotted dose; 3 is a shell; 4 is an inner sleeve; 5 is a fixed nut; 6, pressing a medicine mould; 7 is a mold base; 8 is a thread fixing column; 9 is a thread adjusting column; 10 is a protective cylinder; 11. and (4) punching.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

As shown in FIGS. 1-3, a continuously adjustable gap ignition test apparatus includes a test structure, specifically an igniter 1, LTNR + B/KNO₃The igniter comprises a dotted medicament 2, a shell 3, an inner sleeve 4, a fixing nut 5 and a pressing mold 6 which is matched with the dotted medicament, wherein an igniter 1 is arranged at the bottom of the shell 3, the bottom end surface of the inner sleeve 4 is tightly attached to the top end surface of the igniter 1, and LTNR + B/KNO is pressed in the inner sleeve 4₃Dotted agent 2, LTNR + B/KNO₃The distance h between the lower surface of the dotted medicament 2 and the bottom end surface of the inner sleeve 4 is the gap ignition distance and can be accurately adjusted through a thread adjusting column 9 in the powder pressing mold 6.

The pressing die 6 comprises a die base 7, a thread fixing column 8, a thread adjusting column 9, a protective cylinder 10 and a punch 11;

the protection cylinder 10 is arranged outside the test structure, and the protection cylinder 10 is arranged on the thread fixing column 8; the inner sleeve 4 filled with the dotted medicament is arranged in the thread fixing column 8, the thread adjusting column 9 arranged in the cavity of the thread fixing column 8 extends out of the thread fixing column 8 and can extend to one end, in the inner sleeve 4, of the dotted medicament 2, the extending distance is the gap ignition distance h, and the punch of the pressing die 6 is arranged at one end, in the dotted medicament 2, of the punching die and used for punching.

The distance h that the thread adjusting column 9 stretches out of the thread fixing column 8 is the gap ignition distance, continuous and accurate adjustment can be achieved through thread matching, and the adjusting range is 0-20 mm.

Measuring the distance h that the thread adjusting column 9 extends out of the thread fixing column 8 by using a vernier caliper, repeatedly adjusting the thread adjusting column 9 until the required gap ignition distance is reached, and then press-mounting 15mg and 15mg of LTNR + B/KNO under the condition of 30MPa₃Is spotted with the medicament.

LTNR + B/KNO is carried out under the capacitive discharge condition of 47 muF/50V by using a polysilicon semiconductor bridge as an igniter₃The results of the gap ignition test of the spotted dose by means of Lanli method (2.7 mm lower stimulation line, 6.7mm upper stimulation line, 0.1mm instrument accuracy, choice of logistic distribution, uncorrected standard deviation) are shown in Table 1, which is a set of ignition data results of the inventive example.

After calculation by Lanli, a 50% ignition gap of 4.787mm was obtained.

TABLE 1

Claims

1. A continuously adjustable gap ignition test apparatus, comprising: the testing structure comprises an igniter, a to-be-ignited medicament, an inner sleeve and a fixing nut, wherein the igniter, the to-be-ignited medicament and the inner sleeve are arranged in the shell, the fixing nut is arranged at the top of the shell and used for fixing the inner sleeve and the shell, and the to-be-ignited medicament is arranged in the inner sleeve;

the igniter is placed at the bottom of the shell, the bottom end face of the inner sleeve is tightly attached to the top end face of the igniter, a to-be-ignited medicament is pressed in the inner sleeve, and the distance between the lower surface of the to-be-ignited medicament and the bottom end face of the inner sleeve is the gap ignition distance h;

the device also comprises a pressing die for adjusting the distance h for igniting the ignited medicament in the gap of the inner sleeve;

the pressing die comprises a die base, a thread fixing column, a thread adjusting column, a protective cylinder and a punch;

the protection cylinder is arranged outside the test structure and is arranged on the thread fixing column; the inner sleeve that is packed into by some medicament is set up in the screw thread fixed column, and the screw thread regulation post that sets up in the screw thread fixed column cavity stretches out the screw thread fixed column and can extend to the one end by some medicament in the inner sleeve, and the distance of stretching into is clearance ignition's distance h promptly, and the drift setting of pressing the medicine mould is used for the punching press in the one end by some medicament.

2. The continuously adjustable gap ignition test device of claim 1, wherein the gap ignition distance h is adjusted within a range of 0-20 mm.

3. The continuously adjustable gap ignition test device of claim 1, wherein the pitch of the external threads of the threaded adjustment post and the internal threads of the threaded fixation post is >1 mm.

4. The continuously adjustable gap ignition test device of claim 1, wherein the distance h that the threaded adjustment post is higher than the threaded fixation post is measurably controlled by a vernier caliper.

5. The continuously adjustable gap ignition test device of claim 1, wherein the depth of the recess of the mold base is >30mm to ensure that the threaded adjustment post is fully seated in the recess of the mold base at h-0.

6. The continuously adjustable gap ignition test device of claim 1, wherein the doted agent is LTNR + B/KNO₃。