CN114111473B - Explosion-proof safety test method for needled detonator fuze capable of preventing conclusion distortion - Google Patents
Explosion-proof safety test method for needled detonator fuze capable of preventing conclusion distortion Download PDFInfo
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- CN114111473B CN114111473B CN202111383019.5A CN202111383019A CN114111473B CN 114111473 B CN114111473 B CN 114111473B CN 202111383019 A CN202111383019 A CN 202111383019A CN 114111473 B CN114111473 B CN 114111473B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a method for testing the explosion-proof safety of a detonator with a needle for preventing conclusion distortion, which comprises the steps of performing power equivalent modification on the detonator with the needle, modifying a test detonator, installing the test detonator into a test box, detonating the detonator special for the explosion-proof safety of the detonator in the test detonator, and then evaluating the explosion-proof safety of the detonator. The invention can effectively solve the problem that the modification of the detonator explosion-proof safety test detonator and the addition of the test firing pin insertion hole lead to the test conclusion being optimistic and thus having potential safety hazards. The test method of the invention is to change the detonator which is punched by the fuze into the detonator which is specially used for flame input ignition, equivalent in power and flame-proof safety test, and realize flame ignition by additionally arranging a ignition source in the fuze and additionally arranging a flame transmitting hole or a flame transmitting groove on part of internal structural members of the fuze, wherein the influence on a test conclusion is conservative, thus the distortion of the flame-proof safety performance assessment conclusion of the fuze can be prevented.
Description
Technical Field
The invention belongs to the technical field of fuses, and particularly relates to a method for testing explosion-proof safety of a needled detonator fuse for preventing conclusion distortion.
Background
The detonator is mainly divided into a needle detonator, a flame detonator and an electric detonator. The detonator explosion-proof safety test requires that the detonator in the isolation position inside the detonator is artificially detonated. The electric detonator is provided with a lead wire, and is easy to realize. The flame detonator is ignited by flame, and the structural gap required by the safety movement is relieved by utilizing the explosion-proof piece, so that the flame detonator has no problem. However, the needled detonator often needs to be refitted, and a drilling needle hole is drilled on the detonator along the axis of the detonator at the isolation position in the direction of the input end of the detonator, so that a test needle is inserted to puncture the needled detonator at the isolation position inside the detonator during the explosion-proof safety test of the detonator. Typical settings for this test are shown in GJB 573B-2020 "fuze and fuze parts Environment and Performance test method" graph 401-3. The modification can lead to optimistic distortion of test conclusion, namely gaseous products generated by the ignition and explosion of the needled detonator can be discharged from the channel (the drilled needle insertion hole), so that the pressure of the inner cavity of the detonator is rapidly and greatly reduced, and part of products with explosion-proof safety hidden danger can be mistakenly judged to be qualified due to false images during development and identification tests, thereby forming important safety hidden danger.
Disclosure of Invention
The invention aims to provide a method for testing the explosion-proof safety of a detonator fuse for preventing conclusion distortion, which aims to solve the problem that the test conclusion is distorted due to the modification of the detonator fuse for testing the explosion-proof safety of the detonator.
The technical solution for realizing the purpose of the invention is as follows: a method for testing the explosion-proof safety of a detonator fuse for preventing conclusion distortion comprises the following steps:
step 1, carrying out power equivalent reformation on a fuze needling detonator:
the detonator is characterized in that the detonator is changed into the detonator special for the explosion suppression safety of the detonator, the detonator special for the explosion suppression safety of the detonator is a flame detonator, the external dimension of the detonator is unchanged, the external dimension and the internal dimension of the tube shell are unchanged, the acupuncture sensitive part on the tube shell is broken through, the acupuncture powder charged in the tube shell is changed into ignition powder, and the other charges such as delay powder, initiating powder and high explosive are unchanged.
Further, if the original fuse needling Lei Guandai is provided with a reinforcing cap or a cover plate, the reinforcing cap or the cover plate is not changed in the detonator special for the explosion-proof safety of the fuse.
Further, a silk pad can be added between the ignition powder and the tube shell as required.
Step 2, refitting the test fuze:
the test fuze is properly modified to additionally arrange an electric ignition head or an electric ignition tube as a firing source, and a part of the fuze needs to additionally arrange a fire transmission hole or a fire transmission groove between the firing source and the special detonator for the flame-proof safety of the fuze in an isolation position so that the special detonator for the flame-proof safety of the fuze can be reliably detonated in the flame-proof position of the special detonator.
Step 3, mounting and placing the test fuze into a test box;
step 4, carrying out fuze explosion suppression safety assessment after detonating the special detonator for fuze explosion suppression safety in the test fuze:
the detonator special for the explosion suppression safety of the fuze is ignited and detonated by the ignition source, and the explosion suppression safety of the fuze is evaluated by observing whether the explosion-guiding medicine or the explosion-guiding medicine is detonated, whether the explosion-guiding medicine has signs of being detonated and whether dangerous fragments are sprayed out.
Compared with the prior art, the invention has the beneficial effects that:
the test method can effectively solve the problem that the test conclusion is optimistic due to the fact that the modification of the detonator explosion-proof safety test detonator is added with the test firing pin insertion hole, and the problem that part of products with explosion-proof safety hidden danger are wrongly judged to be qualified because the distortion of test results is not found in the process of developing and identifying the test is avoided.
Drawings
FIG. 1 is a flow chart of a method for testing the explosion-proof safety of a detonator fuze by needle punching, which prevents conclusion distortion.
Fig. 2 is a schematic diagram of an exemplary arrangement of a method for testing the safety of a detonator fuse against conclusion distortion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. It should be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The test method of the invention changes the detonator which is punched by the fuze into the detonator (flame detonator) special for the flame-proof safety of the fuze, and realizes flame ignition by adding a ignition source in the fuze and adding a flame transmitting hole or a flame transmitting groove on the internal structural member of the fuze, wherein the influence on the test conclusion is conservative, thus the evaluation conclusion of the flame-proof safety performance of the fuze can be prevented from optimistically distorted.
Referring to fig. 1, the method for testing the explosion-proof safety of the needled detonator fuse for preventing conclusion distortion is specifically as follows:
step 1, carrying out power equivalent reformation on a fuze needling detonator:
the detonator is changed into the detonator 3 special for the explosion suppression safety of the detonator, the detonator 3 special for the explosion suppression safety of the detonator is a flame detonator, the external dimension of the detonator is unchanged, the external dimension and the internal dimension of the tube shell are unchanged, the acupuncture sensitive part on the tube shell is opened, the acupuncture powder of the internal charge is changed into the ignition powder, and the other charges such as delay powder, initiating powder and high explosive are unchanged.
Further, if the original detonator needle Lei Guandai has a reinforcing cap or cover plate, the reinforcing cap or cover plate is not changed in the detonator 3 dedicated to the explosion suppression safety of the detonator.
Further, a silk pad can be added between the ignition powder and the tube shell as required.
Step 2, refitting the test fuze:
the test fuze is properly modified to additionally arrange an electric ignition head or an electric ignition tube as a firing source 1, and a part of the fuze is required to additionally arrange a fire transmission hole or a fire transmission groove 2 between the firing source 1 and the fuze explosion-proof safety special detonator 3 positioned at an isolation position, so that the fuze explosion-proof safety special detonator 3 can be reliably detonated at the explosion-proof position.
And 3, installing and placing the test fuze into a test box.
Step 4, after detonating the special detonator 3 of detonator explosion-proof safety in the test detonator, carrying out detonator explosion-proof safety assessment:
the detonator 3 special for the explosion suppression safety of the fuze in the explosion test fuze is ignited by the ignition source 1, and the explosion suppression safety of the fuze is evaluated by observing whether the explosion-guiding powder or the explosion-guiding powder is detonated, whether the explosion-guiding powder has signs of being detonated and whether dangerous fragments are ejected.
The ignition powder has high flame sensitivity and sufficient ignition capability, and the most common ignition powder in detonators is lead stevenate. Whereas the needling powder for needling a detonator must have high needling sensitivity and sufficient ignition capability, consisting essentially of an initiating agent, a combustible agent and an oxidizing agent, most needling powder is also added with a sensitizer (such as tetrazene or hard impurities). Common initiating agents used in the needled medicine of the needled detonator are lead stefenate and lead nitride, the combustible agent is antimony sulfide, lead thiocyanate, silicon, iron, magnesium, aluminum powder and the like, and the oxidant is barium nitrate, lead nitrate, potassium cyanate and the like. The classification of the primary explosive in the composition can be divided into a needle-punched medicine with lead stefenate as the primary explosive and a needle-punched medicine with lead nitride as the primary explosive. The needling powder (such as commonly used No. 2 needling powder, with a content of 50% of the lead stevenate) using the lead stevenate as the main initiating explosive has high flame sensitivity, and can be directly used as the initiating explosive. Therefore, the needled detonator is reformed, the dressing change is not needed, and only the needled end of the tube shell is pierced to form an ignition channel. Compared with the common ignition explosive, namely stefenac lead, the needling explosive taking lead nitride as the main initiating explosive has lower flame sensitivity, higher power, stronger working capacity of unit mass and greater threat to the explosion-proof safety of the fuse, so that the needling explosive taking lead nitride as the main initiating explosive cannot be directly replaced by the stefenac lead, otherwise, the test conclusion is optimistically distorted. However, by mixing the stefenac lead and the lead nitride as the ignition powder to replace the needling powder taking the lead nitride as the main initiating powder, not only is enough flame sensitivity ensured, but also the power and the acting capability of the ignition powder are improved, the power equivalence of the needling powder and the ignition powder can be realized, and the problem that the test conclusion brought by simple dressing change is optimistically distorted can be avoided.
In summary, the test method of the invention changes the detonator with the detonator needle into the detonator 3 special for the detonator explosion-proof safety, and the ignition source 1 is additionally arranged in the detonator, and the fire transmission holes or the fire transmission grooves 2 are needed to be modified and additionally arranged on the internal structural parts with large part of the detonator to realize flame ignition, so that the influence on the test conclusion is conservative, and the distortion of the evaluation conclusion of the detonator explosion-proof safety performance can be prevented.
Example 1
Referring to fig. 1 and 2, the method for testing the explosion-proof safety of the needled detonator fuse for preventing conclusion distortion, disclosed by the invention, comprises the following steps:
step 1, the detonator is changed into a detonator 3 special for the explosion suppression safety of the detonator, the detonator 3 special for the explosion suppression safety of the detonator is a flame detonator, the external dimensions of the detonator are unchanged, structural parts such as a tube shell, a reinforcing cap, a cover plate and the like are unchanged, only the acupuncture sensitive part on the tube shell is opened, the acupuncture powder is changed into ignition powder only in the internal charge, other charges such as delay powder, initiating powder, high explosive and the like are unchanged, and a silk pad can be added between the ignition powder and the tube shell according to requirements.
And 2, properly modifying the test fuze to add an electric ignition head or an electric ignition tube as a firing source 1 (in order to ensure that the modified structure is airtight and the test conclusion is not optimistically distorted, a sealant should be added at the lead inlet of the firing source 1, and the electric ignition head or the electric ignition tube needs to be as little as possible in volume under the premise of reliably igniting the detonator special for the flame-proof safety of the fuze), so that reliable flame transfer can be realized by a part of the internal structural clearance of the fuze (such as the clearance formed by clearance fit for ensuring the release of the safety movement of the flame-proof piece) is larger, and a part of the fuze needs to add a flame transfer groove 2 between the firing source 1 and the detonator special for the flame-proof safety of the fuze 3 at the isolation position so that the detonator special for the flame-proof safety of the fuze 3 can be reliably detonated at the flame-proof position of the fuze.
And 3, installing the modified fuzes on a test fixture, and then placing the fuzes into a standard specified fragment test box.
And 4, igniting the special detonator 3 for triggering the explosion suppression safety of the fuse through the electric ignition head or the electric ignition tube, and evaluating the explosion suppression safety of the fuse by observing whether the explosion-guiding powder or the explosion-guiding powder is detonated, whether the explosion-guiding powder has signs of being detonated and whether dangerous fragments are sprayed out.
According to the test method, the detonator is replaced by the detonator 3 special for the flame-proof safety of the detonator, the flame ignition is realized by additionally arranging the ignition source 1 in the detonator and additionally arranging the flame transmission groove 2 on the structural part in the detonator, and the influence on the test conclusion is conservative, so that the evaluation result and the conclusion of the flame-proof safety performance of the detonator can be prevented from optimistically distortion.
The detonator 3 special for the fuse explosion-proof safety can be manufactured and provided by original fuse needling detonator manufacturers under the existing conditions. The equivalent power condition of the powder charge structure can be evaluated by using a charge structure comparison and a lead plate test or an aluminum pit test.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention, and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or changes may be made within the spirit and principles of the invention.
Claims (3)
1. A method for testing the explosion-proof safety of a detonator fuse for preventing conclusion distortion is characterized by comprising the following steps:
step 1, carrying out power equivalent reformation on a fuze needling detonator:
the detonator is changed into a detonator (3) special for the explosion suppression safety of the detonator, the detonator (3) special for the explosion suppression safety of the detonator is a flame detonator, the external dimension of the detonator is unchanged, the external dimension and the internal dimension of the tube shell are also unchanged, the acupuncture sensitive part on the tube shell is opened, the acupuncture powder of the internal powder charge is changed into ignition powder, and the rest powder charges are unchanged;
step 2, refitting the test fuze:
an electric ignition head or an electric ignition tube is additionally arranged as a ignition source (1);
step 3, mounting and placing the test fuze into a test box;
step 4, carrying out fuze explosion suppression safety assessment after detonating the special detonator (3) for fuze explosion suppression safety in the test fuze:
the detonator (3) special for the explosion suppression safety of the fuze in the igniting source (1) igniting and detonating test fuze is evaluated by observing whether the explosion guiding powder or the explosion guiding powder is detonated, whether the explosion guiding powder has signs of being detonated and whether dangerous fragments are sprayed out.
2. The conclusion distortion prevention needle detonator fuze explosion suppression safety test method according to claim 1, wherein the method comprises the following steps of: in the step 1, if the original fuze needling Lei Guandai is provided with a reinforcing cap or a cover plate, the reinforcing cap or the cover plate is not changed in the special detonator (3) for the explosion-proof safety of the fuze.
3. The conclusion distortion prevention needle detonator fuze explosion suppression safety test method according to claim 1, wherein the method comprises the following steps of: in the step 2, a part of fuzes are required to be provided with fire transmission holes or fire transmission grooves (2) between the ignition source (1) and the fuze explosion-proof safety special detonator (3) positioned at the isolation position, so that the fuze explosion-proof safety special detonator (3) can be reliably detonated at the explosion-proof position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383019.5A CN114111473B (en) | 2021-11-22 | 2021-11-22 | Explosion-proof safety test method for needled detonator fuze capable of preventing conclusion distortion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111383019.5A CN114111473B (en) | 2021-11-22 | 2021-11-22 | Explosion-proof safety test method for needled detonator fuze capable of preventing conclusion distortion |
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| CN114111473A CN114111473A (en) | 2022-03-01 |
| CN114111473B true CN114111473B (en) | 2023-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115325890A (en) * | 2022-08-15 | 2022-11-11 | 南京理工大学 | Explosion-proof high-safety ignition fuse |
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