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GB 7958-2014: Capacitor discharge type exploders for coal mines
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Basic data | Standard ID | GB 7958-2014 (GB7958-2014) | | Description (Translated English) | Capacitor discharge type exploders for coal mines | | Sector / Industry | National Standard | | Classification of Chinese Standard | K35 | | Classification of International Standard | 29.260.20 | | Word Count Estimation | 14,154 | | Date of Issue | 12/12/2014 | | Date of Implementation | 11/1/2015 | | Older Standard (superseded by this standard) | GB 7958-2000 | | Quoted Standard | GB/T 191; GB/T 2423.1-2008; GB/T 2423.2-2008; GB/T 2423.4-2008; GB/T 2423.8-1995; GB/T 2423.10-2008; GB 3836.1-2010; GB 3836.2-2010; GB 3836.4-2010; GB 4208; GB/T 6388; GB/T 10111; AQ 1043 | | Regulation (derived from) | National Standards Bulletin 2014 No. 30 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard specifies mine detonator hair capacitive terms and definitions, model name and preparation methods, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and so on. Mine capacitive Exploder appli | GB 7958-2014: Capacitor discharge type exploders for coal mines---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.
Capacitor discharge type exploders for coal mines
ICS 29.260.20
K35
National Standards of People's Republic of China
Replacing GB 7958-2000
Mine capacitive Exploder
Issued on. 2014-12-22
2015-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 model name and Preparation Method 2
5 2 Technical Requirements
6 Test Method 4
7 7 inspection rules
8 signs, packaging, transportation and storage 8
Foreword
All the technical contents of this standard is mandatory.
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB 7958-2000 "coal mine capacitive Exploder."
This standard compared with GB 7958-2000, the main technical content differences are as follows.
--- Detonated action "such as the use of electronic switches should be connected to the output instruction detonation impulse reliably detonate energy output, non-occurrence
Unexpected power phenomenon. "To" such as the use of electronic switches shall ensure continuous and reliable charging process, unexpected power failure now prohibited
Like; it should be connected to the output instruction detonation impulse reliably detonate energy output, power accident occurred phenomenon is strictly prohibited. "(See 5.5,
2000 edition 5.5);
Number of trials --- life test made changes and increases in Table 3 (see 516, 2000 edition 6.12.);
--- Increasing the minimum ignition impulse and specifies the maximum ignition impulse test methods (see 65, 2000 version 6.5.);
--- Ignited impulse, the minimum allowed resistance by GB 8031-2005 have been revised, and synchronizes revised Table 1 (see 5.9 and Table 1, 2000
In version 5.10 and Table 1);
--- Remove the "FCC-3" Exploder parameter tester model (see Table 3 of the 2000 edition);
--- Load resistance "rated load" to "maximum permissible load" (see 58, 59, 2000 edition of 5.9,5.10.);
--- To increase and refine the proof requirements (see 5.7).
Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.
This standard is proposed and managed by the China Coal Industry Association.
This standard by the Institute of Shenyang Coal Group Co., Ltd., Heilongjiang coal Vocational and Technical College, Beijing Science and Technology Development Co., Lung Tak
Division Dashiqiao explosion Factory, Shandong Longtai Mining Equipment Co., Shuangyashan Kinder Industry Co., Ltd., Weinan coal mine equipment
Plant responsible for drafting.
The main drafters of this standard. Fu Shuling, Zhang Xu, Li's, Li Xiaojie, Wang Tao, Wu Peking, Maoyun De, Kang Liying, Liying Yun, Li Zhen West,
Zhang Yan, too LEE, Pan Yanan, Li Warburg like.
This standard replaces the standards previously issued as follows.
--- GB 7958-1987.
Introduction
Mine capacitive Exploder is one of the mining, tunneling and other engineering electric detonators detonated work necessary tools. Since 2000 Revised
Order GB 7958 coal mine capacitive Exploder standard has been implemented ten years, to ensure the quality and safety of the product blasting
It played an important role. GB main technical requirements in 7958-2000 and about the explosion safety requirements are fully justified and necessary
Of this revision work in 7958-2000 on the basis of GB , increase the safety provisions of the content explosion, and explosion-proof security provisions were revised
Order, classification and refinement.
High-voltage terminals capacitive Exploder exposed, clearances and creepage distances are impossible to comply with GB 3836.1-2010 and
GB 3836.3-2010, and it should belong to the "special type", taking into account the many years followed the habit of this amendment remains in GB 7958-2000
About capacitive Exploder made of flameproof requirements formulation.
Mine capacitive Exploder
1 Scope
This standard specifies the terms and definitions for use in mines capacitive Exploder, model name and preparation methods, technical requirements, test methods, inspection
Rules, marking, packaging, transportation, storage and so on.
Mine capacitive Exploder applicable to the coal mine methane and coal dust explosive gas mixtures.
This standard applies to coal with capacitive Exploder (hereinafter referred to as the detonator).
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 191 Packaging - Pictorial signs
GB/T 2423.1-2008 Environmental testing for electric and electronic products Part 2. Test methods Test A. Cold
GB/T 2423.2-2008 Environmental testing for electric and electronic products Part 2. Test methods Test B. Dry heat
GB/T 2423.4-2008 Environmental testing for electric and electronic products Part 2. Test methods - Test Db alternating hot and humid (12h
12h cycle)
GB/T 2423.8-1995 Environmental testing for electric and electronic products Part 2. Test methods Test Ed. Free fall
GB/T 2423.10-2008 Environmental testing for electric and electronic products Part 2. Test methods Test Fc. Vibration (sinusoidal)
GB 3836.1-2010 explosive atmospheres - Part 1. General requirements for equipment
GB 3836.2-2010 explosive atmospheres - Part 2. the flameproof enclosure "d" protection equipment
GB 3836.4-2010 Explosive atmospheres - Part 4. the intrinsically safe "i" protection equipment
GB 4208 housing protection (IP Code)
GB/T 6388 standard transport package shipping
GB/T 10111 random number generation and its application in product quality sampling in
AQ1043 mining product safety signs logo
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Safe power supply time safelysupplyelectricitytime
To prevent the electric detonators, electric blasting network pulled off or re-lap spark caused the explosion of methane and air mixture allowed
Exploder maximum operating time and minimum power supply time.
3.2
Ignition impulse expenditureenergyofelectricdetonatorignite
When energized electric detonators detonated, nickel-chromium wire bridge resistance unit of energy obtained. Multiply its value is equal to the square and passing a current through the power-on time
Product, units of A2 · ms.
4 Type designation and preparation method
4.1 Type designation and preparation method as follows.
Product Type. detonator
First feature. Capacitive
Main parameters. Rated detonated retransmission number
Supplementary features code. indicates additional functions
Design Number. A, B, C
Rated 4.2 retransmission number parameter to detonate the main nickel-chromium wire bridge industrial electric detonator, is preferably 10,25,50,100,150 and 200 series.
4.3 Supplementary features of the code used to indicate additional features.
5 Technical requirements
5.1 detonator shall comply with the provisions of this standard, in accordance with prescribed procedures approved manufacturing drawings and technical documents.
Normal working conditions 5.2 detonator is.
a) Temperature. 0 ℃ ~ 40 ℃;
b) the ambient air relative humidity less than 95% (at 25 ℃);
c) Atmospheric pressure. 80kPa ~ 106kPa.
5.3 Storage ambient temperature. -40 ℃ ~ 60 ℃.
Load resistor and the charge time to comply with Table 1 rated 5.4 detonator detonated when the number of hair.
Table 1 Typical retransmission number detonator allows the load resistance and charging time
Performance
model
FD10 FD25 FD50 FD100 FD150 FD200
Rated detonated retransmission number 102,550,100,150,200
Allowable load resistance
13≤R≤70 70 \u003cR≤160 160\u003cR≤320 320\u003cR≤620 620\u003cR≤920 920\u003cR≤1220
Charging time
≤10 ≤20
Note. When the number of hair is not rated preferred series, decided to calculate the maximum allowable load resistance should be inserted into the law.
5.5 When should detonator to detonate electrical explosion network output impulse operated by dedicated tools. Such as the use of mechanical switches shall be constructed to protect
Card switch handle can not be removed in the "charge" position, and should be flexible rotation; reliable contact on and off, non-accidental power phenomenon occurs; the operation
Shall be available for hand jack dust cap. Such as the use of electronic switches shall ensure continuous and reliable charging process is prohibited unexpected power phenomenon;
Should be connected to the output instruction detonation impulse reliably detonate energy output, power accident occurred phenomenon is strictly prohibited.
5.6 detonator should have the charging voltage to achieve the required voltage lights or other indication means having the same effect, the display should be clear.
5.7 detonator shall meet the following properties intrinsically safe and explosion-proof performance requirements.
a) The safety performance meet the following requirements.
1) Explosion-proof structure intrinsically safe circuits should comply with GB 3836.1-2010, the provisions of GB 3836.4-2010;
2) clearances intrinsically safe and non-intrinsically safe bare conductors shall comply with the provisions of GB 3836.4-2010 in Table 5;
3) between terminals for intrinsically safe and non-high-voltage terminal distance of not less than 50mm, next to the terminals for setting "ib" tag;
4) intrinsically safe circuit shell to withstand 500V, intrinsically safe against non-intrinsically safe voltage terminal should be able to withstand 2000V power frequency withstand voltage, which lasted
1min, may not appear breakdown and flashover, leakage current should not exceed 5mA;
5) detonator during normal operation and fault conditions, the maximum surface temperature of its intrinsically safe circuits, components and housing does not exceed
150 ℃;
6) intrinsically safe circuit shall be capable of 10.1 GB 3836.4-2010 prescribed spark ignition test;
7) the strength of the housing should be able to free fall from a height of 1m drop test explosion on the horizontal flat concrete surface,
Test 4 times, should not affect the deformation and damage of the explosion-proof performance;
8) when the housing is made of non-metallic materials, the surface insulation resistance should be less than 1GΩ;
9) The battery pack should meet the requirements in GB 3836.4-2010 7.4.
b) proof performance should meet the following requirements.
1) surface explosion parameters. surface explosion parameters should be consistent with the provisions of GB 3836.2-2010 in Table 1. Flameproof joint roughness
It should be less than 6.3μm;
Distance 2) clearances and creepage. detonator exposed between the output terminal and the output terminal of the housing and between the exposed conductive parts
Clearances, creepage distances shall not be less than specified in Table 2;
Table 2 clearances and creepage distances
Operating voltage U
CLEARANCE
mm
Creepage distance
mm
U≤1000 10 20
1000 \u003cU≤2000 16 26
2000 \u003cU≤3000 22 32
3) In addition to the high voltage terminal detonator exposed and clearances, creepage distances shall comply with this standard, the explosion-proof performance and structural parameters
Shall comply with GB 3836.1-2010, GB 3836.2-2010 and GB 3836.4-2010 the relevant requirements;
4) Exploder protection class test according to the requirements of GB 4208;
5) Transparency should comply with 26.4.2 in GB 3836.1-2010 and impact test requirements of GB 3836.1-2010
26.5.2 Thermal upheaval requirements;
6) detonator housing should be adopted in GB 3836.2-2010 15.1.3.1 hydrostatic tests (pressure test), by 1MPa, which lasted
1min after the hydrostatic test, it should be no leak proof performance and impact of any deformation and damage;
7) the housing shall GB 3836.1-2010 requirements in 26.4.2 Impact test, after the test shall not affect the explosion-proof
Can be deformed or damaged;
8) housing should by GB 3836.2-2010 casing pressure test in 15.1 and 15.2 for non-transmission of an internal ignition detonation test.
5.8 To the maximum permissible load range, detonators secure power supply time should be less than 4ms; or reaches 4ms, the output voltage across the terminals
Pressure should be reduced to a predetermined value or less intrinsically safe circuit.
5.9 rated detonated detonator made the maximum allowable number of load resistance case, when the voltage indicating device is working properly, detonator ignited punch
The amount should not be less than 7.9A2 · ms and not more than 12.0A2 · ms.
5.10 detonator may be provided with an additional circuit measures the electrical explosion of network status. When the measurement should be showing, and the measurement loop current should not
Greater than 30mA.
5.11 When disconnecting the cable output terminal and internal circuit between the detonator output terminal, an output terminal and the housing between the bare conductors
Insulation resistance at room temperature should be greater than 50MΩ, the calculated value after heat test shall not be less than the formula (1).
R ≥
Up
(1)
Where.
R --- insulation resistance, unit megohms (MΩ);
Up --- detonator peak output voltage in volts (V).
5.12 detonator after damp heat test, the internal parts should be no significant corrosion, its performance should meet the requirements 5.6,5.8,5.9 and 5.10.
5.13 detonator after temperature storage test, performance should meet the requirements 5.6,5.8,5.9 and 5.10.
5.14 detonator After the vibration test, not loose fasteners, explosion-proof structure should meet the requirements of 5.7, the performance should be consistent with 5.6,5.8,
Requirements 5.9 and 5.10.
5.15 detonator after the free drop test, the fastener should not loose and does not affect the deformation and damage of the explosion-proof performance, performance should meet
Meets the requirement 5.6,5.8,5.9 and 5.10.
Number and frequency of 5.16 detonator life test are shown in Table 3. Detonator after life test, explosion-proof structure should meet the requirements of 5.7, workers
It should meet the requirements for performance and 5.6,5.8,5.9 5.10.
Table 3 Life Test
Performance
project
The maximum permissible load and a half load OPEN SHORT
Number 100010005050
Frequency 1/min 1/min 2 times/min 2 times/min
6 Test methods
6.1 Test Instruments
The main instruments used in the test shown in Table 4.
Table 4 Test instruments
No. Name instrument measurement range and accuracy requirements
1 time measuring instrument displays the value of not less than 1% ± 0.1ms
2 ignition impulse output meter displays the value of not less than 5% ± 0.1A2 · ms
3 meter 50mA, 2.5 Ji
4 Megohmmeter 1000V or 2500V
5 stopwatch division value of not more than 0.2s
6 precision resistance box 0 ~ 1.5kΩ, 0.1 Ji
7 pressure tester 5000V
Note 1. The safe power supply time, igniting impulse and peak output voltage can also be used Exploder parameter tester measurement;
Note 2. As with the power supply instead of the battery, the battery should be connected to the equivalent resistance; power short-circuit current of 3A.
6.2 Performance and operating voltage indication means inspection
5.5 and 5.6 according to the requirements of the inspection and the actual operation of the senses.
6.3 Explosion-proof performance
6.3.1 proof structure parameters (including flameproof joint parameters, clearances and creepage distance by measuring inspection). Proof performance Press
GB 3836.1-2010, GB 3836.2-2010 GB 3836.4-2010 and related methods.
6.3.2 Spark ignition test method according to GB 3836.4-2010 be specified in 10.1.
6.3.3 The maximum surface temperature of 10.2 according to the method specified in GB 3836.4-2010 performed.
6.3.4 Dielectric strength test according to the method specified in GB 3836.4-2010 10.3 carried.
6.3.5 Explosion drop test method according to GB 3836.1-2010 be specified in 26.4.3.
6.3.6 battery pack according to the method specified in 10.5 of GB 3836.4-2010.
6.3.7 surface insulation resistance test method according to GB 3836.1-2010 be specified in 26.13.
6.3.8 Test enclosure protection class IP54 according to the method specified in GB 4208 carried out.
6.3.9 Transparency and thermal shock test according to GB drastic changes in the impact test requirements 26.4.2 3836.1-2010 and GB 3836.1-2010
The method will be specified 26.5.2.
6.3.10 static pressure test (pressure test) according to the method specified in GB 3836.2-2010 carried out in 15.1.3.1.
6.3.11 shell impact test according to GB 3836.1-2010 be specified in 26.4.2.
6.3.12 flameproof enclosure internal pressure and ignited respectively 15.1 and 15.2 GB 3836.2-2010 prescribed method of non-transmission test
get on.
6.4 Determination of charging time
From the detonator charge command is issued (which uses mechanical switch detonator handle dedicated to "charge" position, or the use of electronic
Start with a stopwatch, stop it when the voltage indication device display switches detonator charge issued instructions). Determination of total 7 times and the average
Max. As a result cause the battery charging time exceeds requirements, allows the replacement of the battery re-determination.
6.5 security of electricity supply and ignition impulse measurement time
The resistor Exploder parameter tester is set to the maximum allowable load resistance defined by product specifications (including blasting bus resistance) after
Connected with the output terminals detonator, detonators issue ignited impulse output instruction (ie, using the first rotating mechanical switch detonator private hands
To the "charge" position until the voltage indicating device displaying the rotatable handle to "discharge" position; the first issue of charging instructions using electronic switches,
And then send the voltage indicator means to be displayed when the discharge command), read on the Exploder parameter tester secure supply schedules and Chong ignited Scale
The security of electricity supply and the ignition time rushing rated values detonated when the number issued. A total of 7 times.
When the dispute for arbitration test, with the maximum permissible load resistance arranged according to predetermined specifications (including blasting bus resistance)
Precision resistance box and detonator output terminals connected, issue an export detonators ignited impulse command (which uses the rotation when the first mechanical switch detonator
Dedicated to handle the "charge" position until the voltage indicating device displaying the rotatable handle to "discharge" position; when the issue first electronic switch
Charge command, and then issue a command discharge voltage indication means to be displayed), the curve obtained from the read light oscilloscope rated detonated hair count
Security of electricity supply and ignition time when the magnitude of the impulse. A total of 7 times.
To take the maximum safe power supply time for the ignition impulse taking the maximum and minimum values.
6.6 Additional circuit current measurement work and working conditions
Check electrical explosion network conditions and other additional circuitry working conditions. Ammeter measurements current value.
6.7 Insulation resistance measurement
Detonator charge is lower than the peak voltage of 1000V, use 1000V megger; greater than 1000V using 2500V megohm
Table measurements.
6.8 Humidity Test
6.8.1 Test conditions
Temperature. 40 ℃, duration. 6d.
6.8.2 Test procedure
Damp heat test according to the following steps.
A) Before conducting alternating hot and humid test shall be an initial inspection of the appearance of the specimen, the mechanical structure, power operation. Should meet
5.8,5.9 and 5.10 requirements;
b) the specimen is no electricity, no packaging, according to GB/T 2423.4-2008 methods;
c) During the test, the test pieces without intermediate inspection;
d) After the test, the specimens under laboratory conditions return 2h; specimen surface moisture is allowed to dry clean towel or cotton erased;
And immediately test the insulation resistance, check the appearance and performance measurement should be completed within 30min.
6.9 Storage Temperature Test
6.9.1 Low Temperature Test conditions
Temperature. -40 ℃, duration. 16h.
6.9.2 Test procedure
Low temperature test shall be the following steps.
a) the specimen is no electricity, no packaging, according to GB/T 2423.1-2008 in Ab. low-temperature test methods;
b) is not the specimen pretreatment;
c) After the test in the test chamber to recover under laboratory conditions before testing.
6.9.3 High Temperature Test conditions
Temperature. 60 ℃, duration. 16h.
6.9.4 Test procedure
High-temperature test shall be the following steps.
a) the specimen is no electricity, no packaging, according to GB/T 2423.2-2008 in Bb. high-temperature test methods;
b) is not the specimen pretreatment;
c) After the test in the test chamber and then returned to check the performance under laboratory conditions.
6.10 Vibration Test
According to GB/T 2423.10-2008 methods. Severity. sweep frequency 10Hz ~ 150Hz, acceleration amplitude 20m/s2,
On each axis sweep cycles 20 times, a sample of non-packaging, no electricity, no intermediate testing. And explosion-proof structure for visual inspection after the test
Then check the performance.
6.11 free drop test
According to GB/T 2423.8-1995 methods. In detonator vertical and horizontal directions, from the bottom of the detonators from a height from 500mm
By the fall to lay on the concrete floor of 50mm thick pine board 5 times, after trials appearance and performance checks.
6.12 Life Test
In the detonator output terminals access the maximum permissible load, half load conditions, open and short circuits in each charging and discharging test. Such as making
With power supply, should the power circuit in series with the internal resistance of the battery nominal equivalent resistance. And explosion-proof structure for visual inspection after the test again
Checking performance.
7 Inspection rules
7.1 factory inspection
7.1.1 the manufacturer's quality inspection department by Taiwan. Passing inspection before leaving the factory and issued certificate after.
7.1.2 Test items specified in Table 5.
Table 5 Factory and type test
No. Test Item Technical requirements, test methods factory inspection type test
1 Charge Time 5.4 6.4 √ √
2 Operating performance 5.5 6.2 √ √
3 voltage indicator means 5.6 6.2 √ √
4 spark ignition test 5.7a) 6) 6.3.2 - √
5 temperature test 5.7a) 5) 6.3.3 - √
6 Dielectric strength test 5.7a) 4) 6.3.4 √ √
7 drop test explosion 5.7a) 7) 6.3.5 - √
Surface resistance test of non-metallic housing part 5.7a 8) 8) 6.3.7 - √
9 Lithium battery test 5.7a) 9) 6.3.6 - √
10 explosion-proof structure parameter checking 5.7b) 1) 6.3.1 √ √
11 clearances and creepage distances
5.7a) 2), 5.7a) 3),
5.7b) 2)
6.3.1 √ √
12 explosion-proof performance 5.7b) 3) 6.3.1 √ √
13 enclosure protection 5.7b) 4) 6.3.8 - √
Transparent member 14 and the thermal shock test upheaval 5.7b) 5) 6.3.9 - √
15 shell hydrostatic test 5.7b) 6) 6.3.10 √ √
16 shell impact test 5.7b) 7) 6.3.11 - √
17 housing and internal pressure without booster ignition test 5.7b) 8) 6.3.12 - √
18 Safety Supply time 5.8 6.5 √ √
19 ignition impulse 5.9 6.5 √ √
20 additional circuit current 5.10 6.6 √ √
21 5.11 6.7 √ √ Insulation Resistance
Heat test 22 5.12 6.8 - √
Storage temperature test 23 5.13 6.9 - √
24 vibration test 5.14 6.10 - √
25 free drop test 5.15 6.11 - √
26 life test 5.16 6.12 - √
Note. "√" indicates should be examined; "-" indicates not tested.
7.2 Type inspection
7.2.1 of the following circumstances, shall be type tested.
a) new products or old products to the plant production trial to identify stereotypes;
B) After the normal production, such as structure, materials, technology has drastically changed, it may affect product performance;
c) Normal production, every five years;
d) 2 years after the shutdown again resume production;
e) factory inspection and the last type tests in quite different;
f) the national quality supervision bodies during type inspection requirements.
7.2.2 type inspection items specified in Table 5.
7.2.3 Sampling. inspection from the factory's products, according to GB/T 10111 2 extraction. Sampling base is 20.
7.2.4 to determine the rules. to test with two samples. As shown in Table 5 in 4 to 19 with a flat failure, or other items have faile...
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