CN109579644B - A Continuously Adjustable Gap Ignition Test Device - Google Patents

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

A Continuously Adjustable Gap Ignition Test Device

technical field

The invention belongs to the field of igniter performance testing, in particular to a continuously adjustable gap ignition testing device.

Background technique

The function of the igniter is to convert the input energy into heat energy to ignite the pyrotechnic agent in contact with it. Whether the pyrotechnic agent can be ignited reliably, that is, the ignition ability of the pyrotechnic energy conversion element is a factor to consider the performance of the pyrotechnic agent. Important indicators.

At present, there is no means to directly characterize the ignition ability of the igniter. In the patent "A Test Device for the Ignition Ability of a MEMS Pyrotechnic Product Transducer Element" (107702602A), the igniter is used to ignite the ignited agent under a certain gap. The distance of the point agent indirectly indicates the size of the ignition ability of the igniter. However, the method relies on a fixed positioning column to adjust the gap size during the implementation process, which cannot be adjusted continuously, which limits the application of the testing device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a gap ignition test device capable of continuously adjusting the size of the gap.

The technical solution that realizes the purpose of the present invention is:

A continuously adjustable gap ignition test device, comprising an igniter, a drug to be ignited, a shell, an inner sleeve, a fixing nut and a powder pressing mold, the igniter is placed at the bottom of the shell, and the bottom end face of the inner sleeve is close to the bottom of the igniter. The top end face and the inner sleeve are press-fitted with the medicine to be dispensed, and the distance between the lower surface of the medicine to be dispensed and the bottom end face of the inner sleeve is the gap ignition distance, which can be precisely adjusted by the threaded adjustment column in the medicine pressing mold.

Preferably, the medicine pressing mold includes a mold base, a threaded fixing post, a threaded adjusting post, a protective cylinder, an inner sleeve and a punch, and the distance h that the threaded adjusting post extends out of the threaded fixing post can be continuously and precisely adjusted through screw fit, and the adjustment range is within 0～20mm.

Preferably, the pitch of the outer thread of the threaded adjusting column and the inner thread of the threaded fixing column is >1 mm, so as to ensure that the thread adjusting column will not deform the thread when it is subjected to the pressing force.

Preferably, the distance h of the threaded adjustment column higher than the threaded fixed column can be measured and controlled by using a vernier caliper, and the adjustment accuracy is above 0.1 mm.

Preferably, the depth of the cavity of the mold base is greater than 30 mm, so as to ensure that the threaded adjusting column can be completely placed in the cavity of the mold base when h=0.

Compared with the prior art, the present invention has the following significant advantages:

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

2. The present invention can use a vernier caliper to measure the extension distance of the thread adjusting column, with high precision;

3. The pitch of the thread used in the present invention is >1mm, and the pressure resistance is good.

Description of drawings

FIG. 1 is a schematic structural diagram of the gap ignition test device of the present invention.

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

FIG. 3 is a schematic diagram of the cooperation of the threaded fixing column and the threaded adjusting column of the present invention.

Among them, 1 is the igniter; 2 is the drug to be instilled; 3 is the outer shell; 4 is the inner sleeve; 5 is the fixing nut; 6 is the pressing mold; 7 is the mold base; ; 10 is the protective cylinder; 11, the punch.

Detailed ways

The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in Figures 1-3, a continuously adjustable gap ignition test device, including a test structure, specifically an igniter 1, LTNR+B/KNO ₃ , a medicated agent 2, an outer shell 3, an inner sleeve 4, and a fixing nut 5 , and also includes the supporting press mold 6, the igniter 1 is placed at the bottom of the casing 3, the bottom end face of the inner sleeve 4 is close to the top end face of the igniter 1, and the LTNR+B/KNO ₃ is press-fitted in the inner sleeve 4. Dispensing medicine 2, LTNR+B/KNO ₃ The distance h between the lower surface of the medicine 2 being dispensed and the bottom end face of the inner sleeve 4 is the gap ignition distance, which can be precisely adjusted by the threaded adjusting column 9 in the medicine pressing mold 6.

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

Among them, the protective cylinder 10 is arranged outside the test structure, and the protective cylinder 10 is arranged on the threaded fixing column 8; The threaded adjusting column 9 protrudes from the threaded fixing column 8 and can extend to one end of the drug 2 to be dispensed in the inner sleeve 4, and the protruding distance is the distance h of the gap ignition, and the punch of the drug pressing die 6 is set at the point to be placed. One end of the agent 2 is used for punching.

The distance h that the threaded adjusting column 9 protrudes from the threaded fixing column 8 is the distance of the clearance ignition, which can be adjusted continuously and accurately through the thread matching, and the adjustment range is 0-20 mm.

Use a vernier caliper to measure the distance h that the threaded adjustment column 9 protrudes from the threaded fixed column 8, and adjust the threaded adjustment column 9 repeatedly until the required clearance ignition distance is reached, and then press-fit 15mg+15mg of LTNR+B/KNO under the condition of 30MPa ₃ is the point medicine.

Using the polysilicon semiconductor bridge as the igniter, the gap ignition test of LTNR+B/KNO ₃ was conducted under the capacitor discharge condition of 47μF/50V. With the help of Langley method (stimulation lower line 2.7mm, stimulation upper line 6.7mm, the instrument is accurate 0.1 mm, choose logistic distribution, standard deviation is not corrected), test its clearance ignition sensitivity, and the obtained results are shown in Table 1, which is a set of ignition data results of the embodiment of the present invention.

After calculation by the Langley method, the 50% firing clearance is 4.787mm.

Table 1

Claims (6)

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。

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