Test of explosion for pyrotechnics-Brisance test method with plumbum pole compression
Some standard content:
ICS 71.100.30
Agricultural Industry Standard of the People's Republic of China
NY/T1255--2006www.bzxz.net
Determination of Explosion Force of Pyrotechnics
Test of Explosion for Pyrotechnics--Brisance Test Method with Plumbum Pole Compression Issued on 2006-12-06
Implemented on 2007-02-01
Ministry of Agriculture of the People's Republic of China
Appendix A and Appendix B of this standard are normative appendices. This standard was proposed and managed by the Ministry of Agriculture of the People's Republic of China. The main drafting unit of this standard is the Quality Supervision, Inspection and Testing Center of Fireworks and Firecrackers of the Ministry of Agriculture (Ruixiang). The main authors of this standard are: Ya Xuejian, Xia Qiming, Li Hongjiang, Li Aide, Xie Erwen, Peng Ping and Dai Wenping. http://foodm
NY/T1255-2006
1 Scope
Determination of explosive force of pyrotechnics
Test method for explosive force of lead-acid compression
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This standard specifies the principle, instrument, equipment, materials, test procedure and result reporting of the test method for explosive force of pyrotechnics by the column compression method. This standard is applicable to the test of explosive force of powdered and granular pyrotechnics. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For the dated references, all subsequent amendments (excluding errata) or revisions are not applicable. However, the parties to the agreement are encouraged to study whether the latest versions of these documents can be used. For the referenced documents without a date, the latest versions shall apply to this standard. GB131 Mechanical drawings and roughness codes and their replacement GB 469 Lead ingots GB 699 High-quality carbon structural steel grades and general technical conditions GB 208G GB 2449 Flammable lead powder Industrial sulphur and its test methods Drawing methods for mechanical drawings GB 4458.4 GB 6003 GB 8031 (GB 12440) GB 50161 IIG 3247 QB 133 QB 706
Test sieve
Industrial electric detonator
Determination of the intensity of industrial explosives
Safety specification for the design of fireworks and firecracker factories
Industrial potassium perchlorate
Standard cardboard
Cattle limb paper
YB447 brass
3 Test method
3.1 Principle
Under the specified parameters (mass, density and geometric size) and the specified test conditions, the lead is compressed during the explosive refining of the pyrotechnic powder, and the compression value is used to measure the intensity of the pyrotechnic powder.
3.2 Instruments, equipment and materials
3.2.1 Flat plate: Sensitivity 0.1g.
3.2.2 Vernier caliper: graduation value 0.02mm
3.2.3 Depth gauge: graduation value 0.02mm
3.2.4 Steel sheet: high-quality carbon structural steel, according to (699, hardness Im150~200 (see Figure A.1): 3.2.5 Steel sleeve: high-quality carbon shrink steel, according to GB699, hardness TB150200 (see Figure A.2), 3.2.6 Pill pressing mold: brass, according to YB447 (see Figure A.3) 3.2.7 Tight ring: yellow, according to YB447 (see Figure A.4), http
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3.2.8 Roll mold: steel pipe or wood (ton Figure A.5) 3.2.9 Lead column: according to GB469, the content is 99.99% industrial lead ingot (see Figure A.6), each batch of cake column is calibrated according to tree record B, and can be used after the calibration is qualified.
3.2.10 Perforated round cardboard: cardboard thickness is 1.5m-2.0mm (according to QB 133), diameter is 30 mml=0.2 mm, center hole diameter is 1.5 mm±0.1 mm
3.2.11 Kraft paper: according to QB 706, 120g/m2 3.2.12 Paper sheet: cut the kraft paper into 110 mmm, 105mm wide long sheet, and use a roll paper mold to stick into a hollow round tube with an inner diameter of 30mm, cut the extended part and fold it down, close the bottom of the paper tube, cut off the excess overlapping part to form a lead tooth shape, and then seal it with glue. 3.2.13 Electric sticker fire head: According to CB8031, the bridge wire resistance is 1.7Q~2.30, and the amount of medicine is 9mg~-12mg. 3.2.14 Detonator or two No. 1 batteries.
3.2.15 Steel base: medium steel plate 50m×500mm, thickness not less than 10mm, roughness Ra is 6.3nm, hardness T150~200. 3.2.165kg copper.
3.2.1750 m copper core soft wire (copper core cross-sectional area not less than 1 mm2). 3.2.18 Potassium pernitrogenate: According to HG3247, first-class product. 3.2.19 Sulfur: According to (H2449, first-class product 3.2.20 Flammable fine powder: According to GB2086, brand F1X4.3.2.21 Test sieve: wire weaving, 200×50/0.125-square hole sieve, 200×50/0.160 square hole sieve (according to GB6003). 3.2.22 Pan balance: sensitivity 0.1g. | |tt||3.3 Sample
3.3.1 Sample label
The sample shall have the following label: sample name or model, sample production batch number, sample drawing (delivery) date. 3.3.2 Sample preparation
3.3.2.1 Powder sample loading
First, put the paper tube into the sleeve, the bottom of the paper tube is flush with the end of the steel sleeve, and cut off the excess part: weigh the sample 20.0±0.1, slowly press the bottom of the tube, and gently vibrate it to make the medicine surface flat. Use a vernier caliper to measure the thickness of the perforated round cardboard from the vertical direction, and take the arithmetic mean as its thickness value (accurate to 0.01mm). Pass the wire of the electric ignition head through the center hole of the perforated round cardboard die, straighten the wire, let the root of the electric ignition head touch the perforated round cardboard, and then stick them together on the medicine surface, ensuring that the electric ignition head is vertically inserted into the medicine. Under the premise of ensuring the safety of drug pressing, different test densities can be used for testing according to different test purposes. If the test is carried out according to the test natural density, just press gently, tighten the positioning screws, and then withdraw the drug pressing mold. The electric ignition head should not be brought to the mountain when chasing the mold, and the sample should be prevented from leaking out of the round cardboard with holes. Record the positive mold density, calculate the drug height and express it in h (accurate to 0.1mm). If the test density of the natural density is used, the sample should be pressed according to the following force formula, and the drug pressing device is shown in Figure A.7 (:). Before pressing the drug, if there is a clear understanding of the drug mechanical sensitivity or the empirical value of the safety test density, on the premise of confirming the operation of the bed drug, the drug height can be calculated according to the drug pressing density, the tightening ring position can be determined, and the fixing screws can be tightened to apply pressure dynamically; if there is no understanding of the drug mechanical sensitivity, 5 hammers can be used to apply pressure. The method is to keep the device vertically placed on the axis of the circle and the ground, place the copper hammer on the round plate of the drug pressing mold, and use the copper hammer to apply pressure naturally. After it is stable, tighten the fixing screws. Both methods of pressing the powder should be completed behind the protective device. The device should be placed vertically on a smooth and solid ground or board. The body should be slightly backward and the hands should be stretched forward to protect the device. The device should be kept vertically aligned with the ground. Slowly apply pressure until the height of the powder column reaches the test requirements. After pressing the powder, the mold should be withdrawn. The ignition head should not be taken away during withdrawal. And avoid leakage of the sample onto the perforated round cardboard. Record the mold pressure, cut and calculate the height of the powder column, and express it in hm (accurate to 0.1 mm) a3.3.2.2 Granular sample charging
Put the paper sheet into the steel sleeve, and the bottom of the paper sheet should be flush with one end of the steel sleeve. Cut off the excess part. Weigh 20.0g + 0.1g of the sample, slowly pour it into the 2
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paper sheet, naturally pile it up, and gently vibrate it to make the powder surface flat. Use a vernier caliper to measure the thickness of the perforated circular cardboard vertically, and take the arithmetic mean as its thickness value (accurate to 0.01mm). Pass the electric ignition head wire through the center hole of the perforated circular cardboard, and place the root of the electric ignition head close to the cardboard, and then place them together on the powder surface, ensuring that the electric ignition head is relatively vertical to the powder surface and fully inserted into the sample. Use a depth gauge to measure the distance from the cardboard to the end face of the steel sleeve, and calculate the height of the powder column in hm (accurate to D.1 tmm). 3.4 Test procedure
3.4.1. Measuring the height of the lead column
Draw a cross line with a pencil through the center of the circle at one end of the lead column and indicate the serial number, as shown in Figure 1(s). Lightly draw a short cross line on the cross line at 7.5 nm from the intersection. Use a vernier caliper to measure the height of the lead column along the cross line in sequence (accurate to 0.02 mm). When measuring, the end of the vernier caliper should extend to the short cross line. Take the arithmetic mean of the four measured values as the height of the lead column before the test, denoted by h (accurate to D.01 mm). 3.4.2 Explosion test
a) Place the test device according to Figure A.7(b), and place the steel base horizontally. On a hard foundation (concrete thickness not less than 100mm), place a lead column (with the line end facing downwards), a steel sheet and a steel sleeve (charged) in sequence, so that the system is on the same axis (visual inspection). After confirming that the detonator or detonating electrode at the other end of the wire is disconnected, connect the electric ignition head wire to the wire and then detonate. b) After wiping the dirt on the lead column after the test, use a vernier caliper to measure four heights in sequence (accurate to 0.02Hn) as shown in Figure 1(b) in accordance with 3.4.1. Take the arithmetic mean as the drilling height after the test, denoted by h (accurate to 0.01rYI). c) Carry out the test according to the conditions of 3.4.2(a). For the ejection and burning of the specimen, a round cardboard shall be added after the demoulding in 3.3.2(a) or after the depth gauge is used to measure in 3.3.2(b). The round cardboard shall be made of the material specified in 3.2.10 and have a diameter of 32 mm. Carefully embed the steel stick with the hole back into the cardboard and fit it tightly to ensure partial sealing. The other test steps shall be carried out in the same manner, but the following shall be noted when the results are reported: d) The selection of the test site shall comply with the requirements of (GB50161). 3.4.3 Calculation of test results
a) The lead compression value shall be calculated according to formula (1): Ah—n—hr
Lead column compression value, in millimeters (mm): o
Lead column height before test, in millimeters (mm); Lead column height after test, in millimeters (ixtn), hi
b) Two parallel tests shall be carried out on each specimen. For powdery specimens, the difference in compression values between parallel tests shall not exceed 2.0 mm; for granular specimens, the difference in shrinkage values between parallel tests shall not exceed 3.0 mm. Then take the arithmetic mean of the parallel tests (accurate to 0.1 mm), which is the lead cylinder compression value of the specimen. c) If the tests are not parallel, new samples shall be taken until the tests are parallel. 3.4.4 Reporting of results
The test results shall be reported in lead cylinder compression values, and the height of the charge and the state of the test object (powder or granular) shall be noted when reporting. If the test is carried out in accordance with 3.4.2 (c), it shall be noted that a round cardboard is added. 3
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(a) Armor bar without shrinkage
【b) Drill bull after compression
Figure 1 Schematic diagram of lead column before and after compression
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Appendix A
(Normative Appendix]
Diagram of steel sheet, steel sleeve, pill pressing mould, tight ring, paper roll mould, lead column and test device (in millimeters)
Figure A.1 Steel sheet
Figure A.2 Steel sleeve
Example flat plate
Figure A.3 Pill pressing mould
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(The circular plate is nylon king, and the rest are yellow. When combined with the red tightening ring in Figure A4, the tightening ring is located inside the circular plate and can move along the axis.)$24+0.05
Figure A.4 Tightening ring
S0:0-0
Figure A.5 Paper roll mold
Figure A.6 Lead column
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-ground
also ignition head
3——sample
4--electric ignition head wire
6——steel sleeve
7— —Tightening bacteria
8—Positioning screw
()Powder pressing device
Figure A.7Test device diagram
http:
()Pre-test device
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One drug delivery model
One electric ignition wire
I1——Copper red
Steel bottom deer
13-—Staggered column
14—-Steel sheet
Steel (mountain charge)
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B. 1 Pyrotechnic agent for calibration
Appendix B
(Normative Appendix]
Lead column calibration
Separately pass the potassium perchlorate, sulfur and flammable fine aluminum powder through a 200×50/0.125 square hole sieve, weigh the above materials with a rack balance according to the ratio of 55:28:17 and mix them preliminarily, then pass through a 200×50/0.160 square hole sieve and repeat sieving 3 times until fully mixed, dry the mixture in an oven at 55℃±5℃ for 4h, and then put the sample into a desiccator to cool to room temperature, and use it as a standard sample. B.2 Sampling
Each batch Calibrate any 2% of the lead columns, and the number of inspections in a batch shall not be less than 3. If the number of inspections in a batch is more than 3, an odd number shall be used for calibration.
B.3 Calibration
B.3.1 Calibrate the lead column according to the test method specified in Articles 3.3 and 3.4 of the standard text, hm=28.0mm, and the test compression is estimated to be within the range of 21.Srm! 1.0m. The batch of lead machines is qualified. B.3.2 If the test compression value exceeds the tolerance, it is allowed to take new samples and retest according to B3.1. If it still exceeds the tolerance, it is unqualified and the reason should be found. 8
Use companion network05
Figure A.4 Tight ring
S0:0-0
Figure A.5 Paper roll mold
Figure A.6 Lead column
http:
One ground
Also ignition head
3——Test sample
4--Electric ignition head wire
6——Steel sleeve
7——Tight bacteria
8—Positioning screw
()Pressing device
Figure A.7 Test device diagram
http:
（）Pre-test device
NY/T1255—2006
One delivery model soldier
One electric ignition line
I1——Copper red
Gold bottom deer
13-—Staggered column
14—-Steel sheet
Steel (mountain charge)
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B.1 Calibration of pyrotechnics
Appendix B
(Normative Appendix】||t t||Calibration of lead column
Put potassium perchlorate, sulfur and flammable fine aluminum powder through a 200×50/0.125 square hole sieve respectively, weigh the above materials with a rack balance according to the ratio of 55:28:17 and mix them preliminarily, then sieve through a 200×50/0.160 square hole sieve for 3 times until fully mixed, dry the mixture in an oven at 55℃±5℃ for 4h, and then cool the sample in a dryer to the temperature, and use it as a standard sample. B.2 Sampling
Any 2% of each batch of lead columns is calibrated, and -batch The number of samples to be inspected shall not be less than 3. If the number of samples to be inspected in a batch is more than 3, an odd number shall be used for calibration.
B.3 Calibration
B.3.1 Calibrate the lead column according to the test method specified in Articles 3.3 and 3.4 of the standard text, hm=28.0mm, and the compression value of the test is within the range of 21.Srm! 1.0m. The batch of lead machines is qualified. B.3.2 If the test compression value exceeds the tolerance, it is allowed to take new samples and retest according to B3.1. If it still exceeds the tolerance, it is unqualified and the reason should be found. 8
Use companion network05
Figure A.4 Tight ring
S0:0-0
Figure A.5 Paper roll mold
Figure A.6 Lead column
http:
One ground
Also ignition head
3——Test sample
4--Electric ignition head wire
6——Steel sleeve
7——Tight bacteria
8—Positioning screw
()Pressing device
Figure A.7 Test device diagram
http:
（）Pre-test device
NY/T1255—2006
One delivery model soldier
One electric ignition line
I1——Copper red
Gold bottom deer
13-—Staggered column
14—-Steel sheet
Steel (mountain charge)
NY/T1255—2006
B.1 Calibration of pyrotechnics
Appendix B
(Normative Appendix】||t t||Calibration of lead column
Put potassium perchlorate, sulfur and flammable fine aluminum powder through a 200×50/0.125 square hole sieve respectively, weigh the above materials with a rack balance according to the ratio of 55:28:17 and mix them preliminarily, then sieve through a 200×50/0.160 square hole sieve for 3 times until fully mixed, dry the mixture in an oven at 55℃±5℃ for 4h, and then cool the sample in a dryer to the temperature, and use it as a standard sample. B.2 Sampling
Any 2% of each batch of lead columns is calibrated, and -batch The number of samples to be inspected shall not be less than 3. If the number of samples to be inspected in a batch is more than 3, an odd number shall be used for calibration.
B.3 Calibration
B.3.1 Calibrate the lead column according to the test method specified in Articles 3.3 and 3.4 of the standard text, hm=28.0mm, and the compression value of the test is within the range of 21.Srm! 1.0m. The batch of lead machines is qualified. B.3.2 If the test compression value exceeds the tolerance, it is allowed to take new samples and retest according to B3.1. If it still exceeds the tolerance, it is unqualified and the reason should be found. 8
Use companion network
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