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MT 63-1982 English PDF

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MT 63-1982: (Short extension electric detonator)
Status: Obsolete

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
MT 63-1982	English	279	Add to Cart	3 days [Need to translate]	(Short extension electric detonator)	Obsolete	MT 63-1982

Standard similar to MT 63-1982

MT/T 1198

Basic data

Standard ID	MT 63-1982 (MT63-1982)
Description (Translated English)	(Short extension electric detonator)
Sector / Industry	Coal Industry Standard
Word Count Estimation	7,718
Date of Issue	2/21/1983
Date of Implementation	7/1/1983
Summary	This standard applies to segments separated by less than one second extension of various electric detonator, including detonators milliseconds, seconds, half a second detonators and detonator.

MT63:

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Short extension electric detonator) People's Republic of China Industry Standards MT 63-82 Short delay electric detonator 1983-02-21 ratified Approved by the Ministry of Coal Industry

1 Technical requirements 1 2 Inspection rules and test methods 2 3 Packaging and marking 4 4 Guarantee period 4 MT 63-82 Short delay electric detonator This standard is applicable to all kinds of deferred electric detonators with interval less than 1 second, including millisecond Second detonator and half second detonator. The detonators specified in this standard are divided into four series according to the extension time, see Table 1.

1 Technical requirements

1.1 Appearance 1.1.1 The surface of the detonator is not allowed to have floating powder, rust, cracks, and cracks in the paper layer, and slight dirt, grain damage, and mechanical damage to the shell are allowed Defect. 1.1.2 The core wire is not allowed to have damaged insulation and corroded core wires. 1.1.3 The feet must be of two colors. 1.1.4 The sealing plug is not allowed to loosen or come out. 1.2 Pin line Fitting for JB The iron core plastic blast line of 672-77 "Polyvinyl chloride insulated blast line" is 2 meters in length. According to user requirements, also Detonators of other lengths can be produced. 1.3 Charge 1.3.1 The detonating agent is dinitrodiazophenol, and the charge is not less than 0.28 grams, and those without reinforced caps are not less than 0.32 grams. 1.3.2 The explosive is black cord gold, and the charge is not less than 0.60 grams. In order to facilitate the press molding, it is allowed to add no more than 7.5% of the explosive Deactivator. 1.4 Resistance 1.4.1 The bridge wire of the ignition element shall always use nickel-chromium resistance wire, and the total resistance of the detonator with a length of 2 meters is not more than 6.3 ohms. 1.4.2 The tolerance of the bridge wire resistance is not greater than 0.8 ohms. 1.5 Seal fastness The static tensile test is used, with a load of 2 kg for 1 minute. Visible movements of the detonator are not allowed. 1.6 minimum ignition current Constant DC current of not more than 0.7A, guaranteed by product design. 1.7 Extension time 1.7.1 The nominal seconds of each segment of this series of short-delay detonators are listed in Table 1. If there are special requirements, other series of seconds can be produced product.

1 Deferred Seconds Series

Section number First series (millisecond) Second series (millisecond) 1/4 second series (second) Half Second Series (second) 2 25 13 0.25 0.5 3 50 25 0.50 1.0 4 75 38 0.75 1.5 5 110 50 1.00 2.0 MT 63-82 (Continued) Section number First series (millisecond) Second series (millisecond) 1/4 second series (second) Half Second Series (second) 6 150 63 2.5 7.200 75 3.0 20.2000 1.7.2 The second inspection shall meet the requirements of formulas (3) and (4) in Article 2.7 at the same time. In the formula, when k = 2, the product that passed the inspection is the first second. Precision products, when k = 1.5, it is a second-level precision product. 1.8 Deferred Segmentation Flag Segments 1 to 5 are distinguished by different colored feet, see Table 2. The other sections are not distinguished by hanging section numbers on each detonator pin line. 2 1 ~ 5 segments of skirting color Segment 1 2 3 4 5 Base line color gray, red gray, yellow gray, blue gray, white green, red 1.9 Vibration test Explosions or defects such as open circuit, short circuit, unstable resistance, out of range resistance and structural damage are not allowed. 1.10 Series test 20 detonators are connected in series, and a constant DC current of 1.2 amps is passed. 1.11 Safe current test Pass a constant DC current of 0.05A for 5 minutes without explosion. 1.12 Lead plate test Blind fires, incomplete detonation, and the diameter of the lead-through plate smaller than the outer diameter of the detonator are not allowed. If the outer diameter of the detonator exceeds 8 mm. Its fried through The diameter of the lead plate is not less than 8 mm.

2 Inspection rules and test methods

2.1 No more than 6,000 rounds of detonators in the same section are submitted for acceptance (1 section of detonators are allowed to form a batch of no more than 25,000). Each batch of products shall be accompanied by a certificate of conformity. 2.2 Appearance and packaging inspection 100 detonators are randomly selected from each batch for visual inspection (the packaging is fully inspected at the time of sampling) and shall comply with Article 1.1 of this standard and MT 63-82 3.1 ~ 3.4, otherwise the batch will be repaired. 2.3 Resistance test Forty-five rounds are randomly selected from the detonators that have passed the appearance inspection for resistance inspection. No open circuit, short circuit, unstable resistance or out of range are allowed. Or other defects, or the batch of detonators will be repaired. 2.4 Vibration test Take the 45-ton detonator that passed the appearance and resistance inspection and put it into the carton, plug the gap, and place it in the center of the test wooden box. 231- 77 "Vibration tester", with a frequency of 60 ± 1 times/minute, a drop height of 150 ± 2 mm, continuous vibration for 5 minutes, the test results should meet the standard 1.9 Provisions. If 1 round has defects such as structural damage, unstable resistance or out of range, open circuit, short circuit, etc., take the same number and repeat the test; Describe the defect, double the number of retests. if an explosion occurs, the batch is scrapped. After three consecutive batches of tests are qualified, the test is allowed to be performed at least once a day. When there is a failure or a retest, the test cycle is repeated according to the above regulations 2.5 Safe current test Take 20 rounds of detonators that have passed the resistance test (or vibration test) and pass a constant true current of 0.05 A for 5 minutes. Three consecutive batches of tests are allowed to be tested at least once a week after passing. The batch is scrapped when unqualified, the cause of the unqualified is found, and the test cycle is restarted Implement in accordance with the above provisions. 2.6 Serial lead plate test Take 20 rounds of detonators that have passed the resistance test (or vibration test, safe current test), and each one is placed vertically in accordance with WJ1044-78 "Lead plate for industrial detonator test", the center of the lead plate with a thickness of 5 ± 0.1 mm, detonated in series, the results should meet the requirements of 1.10, 1.12 set. If there is 1 blind fire or incomplete detonation, double the number and try again. No more. If there are 2 blind fires or incomplete detonation, the batch of mines Tube failed. If there are 1 rounds of unsuccessful blow-through lead plate apertures, take the same number of retests, and if 2 rounds of unsuccessful passes, double the retests, no more. Ruo Tong When there are two kinds of defects, the batch of detonators must not be retested. 2.7 Deferred seconds test Take 25 rounds of detonators that have passed the resistance test (or vibration test), and detonate them with a constant DC current of 1.2A one by one with an accuracy of not less than The 0.1 millisecond time measurement instrument measures the delay seconds.The first and second series are accurate to 1 millisecond. Second series accurate to 0.01 second, half second The series is accurate to 0.1 second. The test results are calculated by formulas (1) and (2) to calculate the average seconds X and standard deviation S. X = i = 1 Xi S = i = 1 (Xi-X) 2 n-1 In the formula. n --- determining the number of hair; Xi --- The measurement seconds of the i-th detonator. If the calculated X and S satisfy formulas (3) and (4) at the same time, the batch is qualified, otherwise it is unqualified. X ks ≦ U ( X-ks≥L ( In the formula. U, L --- are called the upper boundary and the lower boundary, the values are shown in Table 3; K --- is the accuracy index specified in 1.7.2. If a blind fire is found in the second test, it shall be handled in accordance with the provisions of Article 2.6. If you need to repeat the test, you only need to take 40 rounds to do the tandem test. Lead plate test. 2.8 Seal fastness test Take 10 detonators that pass the vibration test for static tensile test. The test results shall meet the requirements of Article 1.5 of this standard. If there are 1 rounds If the movement is visible to the naked eye, double the number and repeat the test. If there is still movement, the batch will fail. After passing three consecutive batches of tests, at least one test per week is allowed MT 63-82 If the test fails, the test cycle shall be performed again according to the above regulations. 3-second acceptance threshold Segment First series (milliseconds) Second series (milliseconds) 1/4 second series (seconds) Half second series (seconds) LULULULU 1-14-14.5-0.125-0.25 2 14.1 37.5 14.1 37.5 0.126 0.375 0.26 0.75 3 37.6 62.5 37.6 62.5 0.376 0.625 0.76 1.25 4 62.6 92.5 62.6 87.5 0.626 0.875 1.26 1.75 5 92.6 127.5 87.6 112.5 0.876 1.125 1.76 2.25 6 127.6 172.5 112.6 137.5 2.26 2.75 7 172.6 222.5 137.6 162.5 2.76 3.25 8 222.6 277.5 162.6 187.5 9 277.6 350.0 187.6 212.5 10 350.1 417.5 221.6 237.5 11 417.6 502.5 12 502.6 597.5 13 597.6 702.5 14 702.6 817.5 15 817.6 945.0 16 945.1 1000.0 17 1000.1 1295.0 18 1295.1 1535.0 19 1535.1 1840.0 20 1840.1 2160.0 Note. The first paragraph of each series has no lower boundary value L, so there is no need to calculate formula (4).

3 Packaging and marking

3.1 100 rounds per box (those with a length of more than 2 meters can be appropriately reduced per box) with a mark. The box must be sealed tide. 1000 rounds per box (the long line allows proper reduction). There must be no loosening of the detonator in the box and in the box. 3.2 Packing boxes with a thickness of not less than 14 mm (no less than 12 mm allowed for the bottom and cover) or fiberboard with wooden frame (fiberboard thickness (Not less than 3 mm; wooden frame slats are 50 mm wide and 14 mm thick). There must be no decay, and iron nails must not be protruding in the box. The packing box should be firm. 3.3 The product manual should be attached to the packing box, and the factory name, product name, segment, quantity, batch number, gross weight, volume, manufacturing date, The words "Handle with ease" and "Fireproof and Moistureproof" are marked with explosives, if the product is produced according to the length required by the user. Should also note Open leg length. 3.4 The packing box should be sealed with seals or fire paint or lead seals.

4 Guarantee period

Under the original packaging conditions, the detonator is stored in a naturally ventilated and dry warehouse. The warranty period of the detonator from the date of manufacture is MT 63-82 Two years, the paper tube shell is one and a half years. Additional information. This Standard was drafted by Pan Zumin of the 12th Plant of Fuxin Mining Bureau. Since the date of implementation of this standard, the Ministry of Fuel and Chemical Industry Standard RH-73 "Delayed Electric Detonator in Milliseconds" has been abolished. MT 63-82

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