CN101783496B - New explosion-proof method of electrical devices - Google Patents
New explosion-proof method of electrical devices Download PDFInfo
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- CN101783496B CN101783496B CN 201010104731 CN201010104731A CN101783496B CN 101783496 B CN101783496 B CN 101783496B CN 201010104731 CN201010104731 CN 201010104731 CN 201010104731 A CN201010104731 A CN 201010104731A CN 101783496 B CN101783496 B CN 101783496B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 62
- 230000003287 optical effect Effects 0.000 claims description 20
- 238000004880 explosion Methods 0.000 claims description 18
- 239000013307 optical fiber Substances 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 6
- 238000010892 electric spark Methods 0.000 abstract description 6
- 239000002360 explosive Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Abstract
The invention relates to a special explosion-proof method of electrical devices, which is applicable to designing and manufacturing explosion-proof electrical devices used in mines, chemical industrial and other flammable and explosive places. The new explosion-proof method is to increase light-sensitive and heat-sensitive sensors and protection circuits in housings of all explosion-isolating type electrical devices like a cable junction box, an electrical switch, a motor, a transformer and the like, and increase the protection circuits in the upper stage of the electrical switch. When electric spark is produced in the housings of the explosion-isolating type electrical devices, the light-sensitive and heat-sensitive sensors convert light or temperature signals to electric signals, and the electric signals are transmitted to the protection circuit of the upper stage of the electrical switch through a transmission channel, thereby leading the upper stage of the electrical switch to trip and disconnect a fault circuit. The new explosion-proof method can not only solve the potential safety hazard in the existing explosion-proof technology, but also avoid the misoperation of live opening of the electrical devices.
Description
Technical field
The present invention relates to a kind of special explosion-proof method of electric equipment, the special explosion-proof method of this electric equipment is applicable to inflammable and explosive the employed electrical apparatus for explosive atmospheres such as mine, chemical industry.
Technical background
At present, our country in the mine, inflammable and explosive the employed electrical apparatus for explosive atmospheres such as chemical industry, all be that the requirement according to standard GB/T 3836-2000 comes Design and manufacture.The GB3836-2000 national standard is to formulate according to international standard IEC60079.The GB3836-2000 national standard comprises following four standards, is respectively: GB3836.1-2000, GB3836.2-2000, GB3836.3-2000 and GB3836.4-2000.GB3836.2-2000 is the standard of flameproof electrical apparatus, and it has stipulated the requirement of explosion proof of the Design and manufacture of flameproof electrical apparatus, requires to reach the explosion-proof purpose of electric equipment by these.
Flameproof electrical apparatus, he is that anti-quick-fried property and the flame proof by the electric equipment flameproof enclosure reaches explosion-proof purpose, anti-quick-fried property is that the requirement flameproof enclosure has certain mechanical strength, flame proof is that the faying face of each parts of requirement flameproof enclosure will meet certain requirement, these requirements are respectively: the explosion suppresion surface width, the explosion suppresion surface gap, the explosion suppresion surface roughness.His explosion-proof principle is: when the electric equipment flameproof enclosure inner because flammable gas explosion or electric fault produce electric spark, when outwards propagating by the explosion suppresion surface that satisfies anti-quick-fried property and flame proof, heat is by explosion suppresion surface metal or other material absorbings, what make that it spreads out of explosion suppresion surface is gas, is not spark.This explosion-proof theory has been ignored a problem; that is: when the electric equipment flameproof enclosure inner because flammable gas explosion or electric fault produce electric spark; can cause arc short-circuit; arc short-circuit size of current and arc length are inversely proportional to; this current value often can not make the tripping operation of electric switch protective device; can not in time excise fault; arc light will continue; electric equipment explosion suppresion surface heat is accumulated gradually, and filament saturation makes explosion suppresion surface can not play the effect of absorbing heat; what spread out of at last is not gas; but spark will cause the outside flammable gas explosion of explosion-proof type electric apparatus shell, brings about great losses for national wealth and miner's life security.This type of accident is existing the generation under coal mine.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of special explosion-proof method of electric equipment is provided, the problem that exists to solve prior art.
For reaching above purpose, the present invention takes following three kinds of solutions, and the first scheme is: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core, protective wire two cores between flameproof electrical apparatus and the mains side electric switch by six conductor cable; In the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and the first protective circuit, and photosensitively be connected with the input of heat-sensitive sensor with the first protective circuit, the output of the first protective circuit is connected with two core protective wires, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner second protective circuit that increases of mains side electric switch, the input of the second protective circuit is connected with two core protective wires, and the output of the second protective circuit acts on the tripping operation of mains side electric switch.First scheme is: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core between flameproof electrical apparatus and the mains side electric switch by quad; At the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and carrier sending device, and photosensitively be connected with the carrier sending device input with heat-sensitive sensor, the carrier sending device output is connected with power line, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner carrier wave receiving system and the protective circuit of increasing of mains side electric switch; The input of carrier wave receiving system is connected with power line, and the output of carrier wave receiving system is connected with the protective circuit input, and the protective circuit output acts on the tripping operation of mains side electric switch.The third scheme is: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core, optical fiber one core or multicore between flameproof electrical apparatus and the mains side electric switch with optical fiber mix cable by plain conductor; At the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and optical transmitter, and photosensitively be connected with the optical transmitter input with heat-sensitive sensor, the optical transmitter output is connected with optical fiber, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner optical receiver and the protective circuit of increasing of mains side electric switch; The input of optical receiver is connected with optical fiber, and the output of optical receiver is connected with the protective circuit input, and the protective circuit output acts on the tripping operation of mains side electric switch.
Because the present invention has adopted such scheme, not only can solve the explosion-proof defective of flameproof electrical apparatus, can also avoid charged misoperation of opening electric equipment.As: when charged electric equipment shell or the terminal box opened; the entrained head lamp light of extraneous light or operating personnel can make the photosensitive and heat-sensitive sensor of flameproof electrical apparatus or terminal box inside produce the signal of telecommunication; deliver in the mains side electric switch by protective wire, power line or optical fiber transmission; make its switch trip, avoid the generation of person electric shock or electric short circuit fault.
Description of drawings
For the ease of understanding structural principle of the present invention and implementing best mode of the present invention, the present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the first scheme system block diagram of the present invention;
Fig. 2 is first scheme system block diagram of the present invention;
Fig. 3 is the third scheme system block diagram of the present invention;
Embodiment
Implementation column 1: Fig. 1 is the first scheme system block diagram of the present invention, and the stube cable between the electric equipment of the present invention adopts six conductor cable, power line three cores, protective earthing line one core, protective wire two cores; The inner increase of the explosion-proof type electric apparatus shells such as all cable straight joints, electric switch, motor, transformer photosensitive and heat-sensitive sensor and protective circuit; photosensitively be connected with the input of protective circuit with heat-sensitive sensor; the output of protective circuit is connected with two core protective wires; the main circuit part of electric equipment is connected with three core power lines; in the inner protective circuit that increases of upper level electric switch; the input of protective circuit is connected with two core protective wires, and the output of protective circuit acts on tripping operation.Produce electric spark when explosion-proof type electric apparatus shell is inner; photosensitive and heat-sensitive sensor converts light or temperature signal to the signal of telecommunication; this signal of telecommunication is delivered in the first protective circuit; be sent in the protective circuit of upper level electric switch by two core protective wires; make mains side electric switch K tripping operation, open failure circuit by this protective circuit.
Implementation column 2: Fig. 2 is first scheme system block diagram of the present invention; stube cable between the electric equipment of the present invention adopts quad; three core power lines wherein; one core protective earthing line; all cable straight joints; electric switch; motor; the inner increase of the explosion-proof type electric apparatus shells such as transformer photosensitive and heat-sensitive sensor and carrier sending device; photosensitively be connected with the carrier sending device input with heat-sensitive sensor; the carrier sending device output is connected with power line; the main circuit part of electric equipment is connected with three core power lines; in inner carrier wave receiving system and the protective circuit of increasing of upper level electric switch; the input of carrier wave receiving system is connected with power line; the output of carrier wave receiving system is connected with the protective circuit input, and protective circuit acts on the K switch tripping operation.Produce electric spark when explosion-proof type electric apparatus shell is inner; photosensitive and heat-sensitive sensor converts light or temperature signal to the signal of telecommunication; this signal of telecommunication is delivered to carrier sending device and is modulated; carrier sending device is sent to carrier signal by power line the carrier wave receiving system of upper level electric switch; after the carrier wave receiving system receives this carrier signal; make mains side electric switch K tripping operation, open failure circuit by protective circuit.
Implementation column 3: Fig. 3 is the third scheme system block diagram of the present invention; stube cable between the electric equipment of the present invention adopts plain conductor and the mixed cable of optical fiber; three core power lines wherein; one core protective earthing line; one core or multi-core fiber; all cable straight joints; electric switch; motor; the inner increase of the explosion-proof type electric apparatus shells such as transformer photosensitive and heat-sensitive sensor and optical transmitter; photosensitively be connected with the optical transmitter input with heat-sensitive sensor; the optical transmitter output is connected with optical fiber; electric equipment main circuit part is connected with three core power lines; in inner optical receiver and the protective circuit of increasing of upper level electric switch; the input of optical receiver is connected with optical fiber; the output of optical receiver is connected with protective circuit, and protective circuit acts on tripping operation.Produce electric spark when flameproof electrical apparatus is inner; photosensitive and heat-sensitive sensor converts light or temperature signal to the signal of telecommunication; this signal of telecommunication is delivered to optical transmitter and is converted light signal to; this light signal is sent to the optical receiver of upper level electric switch by optical fiber; make upper level electric switch K tripping operation, open failure circuit by protective circuit.
Claims (3)
1. the special explosion-proof method of an electric equipment, it is characterized in that: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core, protective wire two cores between flameproof electrical apparatus and the mains side electric switch by six conductor cable; In the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and the first protective circuit, and photosensitively be connected with the input of heat-sensitive sensor with the first protective circuit, the output of the first protective circuit is connected with two core protective wires, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner second protective circuit that increases of mains side electric switch, the input of the second protective circuit is connected with two core protective wires, and the output of the second protective circuit acts on the tripping operation of mains side electric switch.
2. the special explosion-proof method of an electric equipment, it is characterized in that: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core between flameproof electrical apparatus and the mains side electric switch by quad; At the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and carrier sending device, and photosensitively be connected with the carrier sending device input with heat-sensitive sensor, the carrier sending device output is connected with power line, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner carrier wave receiving system and the protective circuit of increasing of mains side electric switch; the input of carrier wave receiving system is connected with power line; the output of carrier wave receiving system is connected with the protective circuit input, and the protective circuit output acts on the tripping operation of mains side electric switch.
3. the special explosion-proof method of an electric equipment, it is characterized in that: flameproof electrical apparatus and mains side electric switch are set in explosion protection system, and flameproof electrical apparatus comprises cable straight joint, electric switch, motor and transformer; Be connected power line three cores wherein, protective earthing line one core, optical fiber one core or multicore between flameproof electrical apparatus and the mains side electric switch with optical fiber mix cable by plain conductor; At the inner increase of all explosion-proof type electric apparatus shells photosensitive and heat-sensitive sensor and optical transmitter, and photosensitively be connected with the optical transmitter input with heat-sensitive sensor, the optical transmitter output is connected with optical fiber, and the main circuit part of flameproof electrical apparatus is connected with three core power lines; In inner optical receiver and the protective circuit of increasing of mains side electric switch, the input of optical receiver is connected with optical fiber, and the output of optical receiver is connected with the protective circuit input, and the protective circuit output acts on the tripping operation of mains side electric switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010104731 CN101783496B (en) | 2010-02-03 | 2010-02-03 | New explosion-proof method of electrical devices |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010104731 CN101783496B (en) | 2010-02-03 | 2010-02-03 | New explosion-proof method of electrical devices |
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| CN101783496A CN101783496A (en) | 2010-07-21 |
| CN101783496B true CN101783496B (en) | 2013-02-06 |
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| CN 201010104731 Expired - Fee Related CN101783496B (en) | 2010-02-03 | 2010-02-03 | New explosion-proof method of electrical devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107769161A (en) * | 2017-10-23 | 2018-03-06 | 李孝杰 | A kind of electrical explosion proof method of fast break |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018467Y (en) * | 2007-03-06 | 2008-02-06 | 费江海 | Hierarchical closedown control circuit of explosion-proof type feed switch for mining |
| CN201332264Y (en) * | 2009-01-05 | 2009-10-21 | 河南理工大学 | Chain safeguard intelligent control device for coal mine downhole power supply system |
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2010
- 2010-02-03 CN CN 201010104731 patent/CN101783496B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018467Y (en) * | 2007-03-06 | 2008-02-06 | 费江海 | Hierarchical closedown control circuit of explosion-proof type feed switch for mining |
| CN201332264Y (en) * | 2009-01-05 | 2009-10-21 | 河南理工大学 | Chain safeguard intelligent control device for coal mine downhole power supply system |
Non-Patent Citations (2)
| Title |
|---|
| 闫昌东.煤矿防爆电器技术现状及分析.《电气开关》.2008,(第4期),60-62. * |
| 陈轶平.矿用隔爆型信号仪在煤矿中的应用.《同煤科技》.2009,(第1期),6-7. * |
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| CN101783496A (en) | 2010-07-21 |
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