GB 7958-2014Capacitor discharge type exploders for coal mines (English PDF)

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.

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

GB 7958-2014 is the Chinese national standard on capacitor discharge type exploders for coal mines, in the field of electrical engineering. It carries no /T suffix, which in the Chinese system means compliance is mandatory: a product or a practice within its scope has to meet it to be lawfully made, sold or carried out in China. It was issued on 22 December 2014 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 November 2015. Classification: ICS 29.260.20, CCS K35. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

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 °C ~ 40 °C;

b) the ambient air relative humidity less than 95% (at 25 °C);

c) Atmospheric pressure. 80kPa ~ 106kPa.

5.3 Storage ambient temperature. -40 °C ~ 60 °C. 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 °C; 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 1GOmega; 9) The battery pack should meet the requirements in GB 3836.4-2010 7.4.