CN101719645A - Anti-explosion safety design method of skin-effect anti-explosion power supply junction box - Google Patents
Anti-explosion safety design method of skin-effect anti-explosion power supply junction box Download PDFInfo
- Publication number
- CN101719645A CN101719645A CN200910164587A CN200910164587A CN101719645A CN 101719645 A CN101719645 A CN 101719645A CN 200910164587 A CN200910164587 A CN 200910164587A CN 200910164587 A CN200910164587 A CN 200910164587A CN 101719645 A CN101719645 A CN 101719645A
- Authority
- CN
- China
- Prior art keywords
- explosion
- electric wire
- skin
- high temperature
- effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to an anti-explosion safety design method of a skin-effect anti-explosion power supply junction box, which comprises a cable lead-in device, an element lead-out device, an input three-core cable, a shell, a connection terminal, anti-explosion insulation plaster, a skin-effect heating element and a high-temperature electric wire. The method comprises the following steps of: 1. preferentially taking actual skin-effect thickness to realize the personnel safety and economical efficiency; 2. enabling the maximum surface temperature of the shell to reach a specified anti-explosion value by raising the temperature in a connecting line cavity; 3, guaranteeing the anti-explosion performance of the connecting line cavity by using an isolation structure to cut off the gap of the connecting line cavity; 4. guiding static to a ground protection insulation layer by using an arc extinction electric wire; 5. meeting the anti-explosion requirements on electric clearance, creep age distance, insulation material comparative tracking index classification, and protection grade; 6. achieving electrical safety protection function and meeting the anti-explosion electrical safety requirement by arranging a grounding protection device on the surface. The invention solves the problems of the design of structure, installment and safety technology of anti-explosion power supply junction boxes in dangerous places and areas in an explosive atmosphere.
Description
Technical field
The present invention relates to the anti-explosion safety method for designing of the explosion-proof electrical source terminal box of skin-effect electric heating element on the long distance pipeline.
Background technology
Known, long distance pipeline is pillar industries " lifeline " such as oil, chemical industry, is the main artery of national economy.For oil field long distance pipeline, harbour long distance pipeline, chemical plant installations long distance pipeline, Long-distance Transmission Pipeline etc., require to keep the long distance pipeline surface temperature when ordinary production flows operation under the ambient temperature in order to guarantee that " medium " surpasses in it, can between long distance pipeline surface and heat-insulation layer, install vertically one or a few " skin-effect electric heating element ", play the effect of companion's thermal compensation heat.The length of skin-effect electric heating element is longer, and every is provided with an AC power at the one end, can drive skin-effect electric heating element and reach about 20km most.Its principle is to wear one " high temperature electric wire " in " ferromagnetic steel pipe ", its tail end core is connected with the ferromagnetic steel pipe tail end, they form series circuit with the phase line of AC power and zero line respectively at head end, and the alternating current direction is by the inwall of splicing ear by head end, high temperature electric wire tail end and the ferromagnetic steel pipe tail end of high temperature electric wire of the phase line of AC power, ferromagnetic steel pipe, turns back to zero-power line at last.Because the AC resistance of the series electrical air circuit that high temperature electric wire is formed in the ferromagnetic steel pipe is obviously big than D.C. resistance, and the passage of alternating current is that the inwall along its cross section changes to the outer wall exponential damping, and direct current is its even distribution, and its current channel is by way of the influence that is subjected to kelvin effect and proximity effect, its current density be by inwall to the outer wall index variation, drop at last and ignore certain current strength and just can not produce danger people's contact.Therefore heating principle produces heats by three aspects: (1) just produces Joule heat when alternating current on high temperature electric wire resistance; (2) Joule heat by producing on the resistance in the ferromagnetic steel pipe; (3) because the alternating current in the high temperature electric wire causes that the magnetic flux in ferromagnetic steel pipe brings out electromotive force, the Joule heat that the resistance of whirlpool alternating current in its ancient piece of jade, round, flat and with a hole in its centre produces, and overcome the heat that magnetic domain rubs.
" electric source connecting box " is used for being connected of " skin-effect electric heating element " and " input cable ", because of the skin-effect electric heating element that the accumulating of user's long distance pipeline is produced very long, each a little device may be in explosion-proof place fully, especially general " electric source connecting box " do not possess blast resistance construction, technical performance and do not meet fail safe, can not be applicable to explosion-proof place.
Summary of the invention
The anti-explosion safety that the purpose of this invention is to provide skin-effect electric heating element kelvin effect explosion-proof electrical source terminal box on the long distance pipeline is established the juice method, it installs the head end that is placed on skin-effect electric heating element, can not only be used for being connected of AC power cable and skin-effect electric heating element, and solve the safety related technical problems in zone, electric source connecting box explosive gas atmosphere of living in hazardous area.
The inventive method comprises:
1, be used for skin-effect electric heating element that long distance pipeline uses ' AC power ' and ' frequency ' commonly used and have two kinds as the frequency of the AC power of 50Hz or 50～400Hz electric tracing skin-effect electric heating element: its power frequency 50Hz is used to drive its length and is no more than 20km left and right sides skin-effect electric heating element; Intermediate frequency is adjustable, and scope 50～400Hz is used to drive its length and is no more than 3km left and right sides skin-effect electric heating element, and its enclosure material is that ferromagnetic steel pipe is made, its magnetic permeability and resistivity to select excellent be crucial to fail safe, technical performance, Financial cost.After AC power and frequency are determined, kelvin effect explosion-proof electrical source terminal box enclosure material is the same with the skin-effect electric heating element enclosure material, the shell wall thickness of kelvin effect explosion-proof electrical source terminal box and skin-effect electric heating element depends on " skin thickness becomes ", its direction be inwall by its inner chamber to outer wall, and press index law and change.When the shell wall thickness material of kelvin effect explosion-proof electrical source terminal box and skin-effect electric heating element is selected the peak of " magnetic permeability " and " resistivity ", can realize optimum efficiency:
1. " skin thickness becomes " book is can alternative costs economy minimum;
2. the foundation for the calculating of the shell wall thickness of kelvin effect explosion-proof electrical source terminal box and ferromagnetic steel pipe shell wall thickness is " skin thickness becomes ", because its surface changes to decay by index law, its difficulty avoids existing " earial drainage electric current " very in a small amount, " surface voltage " should fully take into account various unfavorable safety factors, alternating current be its cross section current channel along inwall from inwall to outer wall by index law change to can influence the personal safety degree come juice to calculate, and " the actual margin of safety " of definite its thickness is " skin thickness becomes " three times or bigger at least.
3. skin-effect electric heating element uses length longer, and operating voltage is higher, in order to guarantee that person contact skin effect heating part system surfaces especially to the safety on the surface of " kelvin effect explosion-proof electrical source terminal box ", must have " ground protection "." earth protective device " that will be provided with because of its case surface; though it is safe that kelvin effect explosion-proof electrical source terminal box or skin-effect electric heating element surface are not answered charged in theory; in case job failure appears in skin-effect electric heating element or kelvin effect explosion-proof electrical source terminal box; " earth protective device " that its surface is provided with can play the electric security protector effect, satisfies explosion-proof electrification requirement, safety requirements.
2, the maximum temperature of kelvin effect explosion-proof electrical source terminal box operating state be by the generation caloric value on the AC resistance of the ohmically generation caloric value of electric current input cable core section in its inner chamber, high temperature electric wire core Duan Zaiqi, ferromagnetic steel pipe within it the generation caloric value on the contact resistance of the AC resistance of wall and three splicing ears cause that the temperature of wire connection cavity raises, lead its shell maximum surface temperature, and add that the safe dose of high environment is no more than the setting of explosion-proof criteria " the maximum surface temperature grouping of II class electric equipment ".
3, in very long skin-effect electric heating element is between its " ferromagnetic steel pipe " and " high temperature electric wire ", there is the air gap, long distance has formed " interstitial cavities ", when the energising heating, its expansion or shrinkage variation are flowed and are caused that the pressure breathing influences explosion-proof performance, therefore to make between " interstitial cavities " of " wire connection cavity " of kelvin effect explosion-proof electrical source terminal box and skin-effect electric heating element and should carry out " isolation ", promptly stretching into " interstitial cavities " of skin-effect electric heating element between its head end position " ferromagnetic steel pipe " and " high temperature electric wire " of kelvin effect explosion-proof electrical source terminal box wire connection cavity utilizes isolated material to cut off, make " wire connection cavity " and " interstitial cavities ", structurally guarantee the anti-explosion safety performance of kelvin effect explosion-proof electrical source terminal box, isolate yet the element output device of kelvin effect explosion-proof electrical source terminal box rises to connect, sealing, fixing, the installation effect.
4, the working volts alternating current of skin effect heating part is higher relatively, and (as being higher than 4 kilovolts of power frequencies), its＜open and close〉or＜switching〉the frequent temperature of state control and produce " corona "! Its ferromagnetic steel pipe inner wall surface can accumulate static in a large number to the surface on the high temperature electric wire sheath, leads easily to puncture broken wear-resisting antistatic restrictive coating of cup and insulating barrier, and therefore the fault that can give rise to trouble requires the outer surface resistance value of wear-resisting antistatic restrictive coating to be not less than 10
(8～9)Ω slows down or guides its " static " to the earth, the protection insulating barrier.The cable entry that can be in kelvin effect explosion-proof electrical source terminal box connects its wear-resisting antistatic restrictive coating utilization input three-core cable with lead on the head end of high temperature electric wire passes guiding its " static " to the earth, extinguishes " corona " protection high temperature electric wire.
5, " electric clearance ", " minimum creep distance " of three binding post exposure portion in the wire connection cavity of " kelvin effect explosion-proof electrical source terminal box " reach " classification of insulating material phase ratio creepage tracking index " and will satisfy being not less than of national explosion-proof criteria of alternating voltage peak and frequency simultaneously and look definite value.
6, the input three-core cable that enters its wire connection cavity from kelvin effect explosion-proof electrical source terminal box cable entry has three cores: the core of " L phase line electric wire " is connected with " high temperature electric wire " core of " skin-effect electric heating element " by splicing ear; The core of " N change electric wire " is by being connected with splicing ear on " ferromagnetic steel pipe " head end inwall, they form series circuit with AC power phase line and zero-power line respectively at head end, and the alternating current direction is by the inwall of the splicing ear of AC power phase line by head end, high temperature electric wire tail end and the ferromagnetic steel pipe tail end of high temperature electric wire, ferromagnetic steel pipe, turns back to zero-power line at last; The splicing ear that the core of input three-core cable " S extinguishing arc electric wire " passes through is connected with high temperature electric wire wear-resisting antistatic restrictive coating head end; utilize the extinguishing arc electric wire of importing three-core cable to pass cable entry and pass guiding its " static ", extinguish " corona " protection high temperature electric wire to the earth.
7, kelvin effect explosion-proof electrical source terminal box should be able to satisfy requirement outdoor rainproof, the IP " degree of protection " that soaks, prevents dust.
Beneficial effect of the present invention is as follows:
The present invention program passes through: the 1. excellent actual collection skin skin thickness that becomes of getting is realized the method for shell Personal Safety and economy; 2. the wiring cavity temperature raises and causes that the shell maximum surface temperature meets the method for the setting of explosion-proof criteria " the maximum surface temperature grouping of II class electric equipment "; 3. effectively take isolation structure cut-out wire connection cavity and interstitial cavities to guarantee the method for wire connection cavity anti-explosion safety performance; 4. utilize the method for the static of the wear-resisting antistatic restrictive coating of extinguishing arc wire guide to the earth protection insulating barrier; 5. the method that meets the relevant requirement of explosion proof electric clearance of country, creepage distance, the classification of insulating material phase ratio creepage tracking index, degree of protection requirement; 6. locating the shell surface is provided with earth protective device and can plays the method that the explosion-proof electrification safety requirements is satisfied in the electric security protector effect.Design of explosion-proof electrical source junction box structure and safety related technical problems have been solved at explosive atmosphere place skin-effect electric heating element.
Description of drawings
Fig. 1 is the principle and the structural representation thereof of the embodiment of the invention.
Fig. 2 is the cross section structure schematic diagram of skin effect heating part in the embodiment of the invention.
Fig. 3 is the lid partial structurtes schematic diagram of the embodiment of the invention.
Specific implementation method
The invention will be further described below in conjunction with accompanying drawing.
According to shown in Figure 1, the use and the structural representation thereof of the embodiment of the invention comprise: AC power 1, input three-core cable 2, cable pressed sealing device 3, cable seal circle 4, shell 5, N zero-power line 6, S extinguishing arc electric wire 7, L power supply phase line 8, splicing ear 9, element sealing ring 10, explosion-proof isolation clay 11, element connect joint 12, ferromagnetic steel pipe 13, wear-resisting antistatic restrictive coating 14, insulating barrier 15, high temperature electric wire core 16, interstitial cavities 17, earth protective device 18, zone, explosive gas atmosphere hazardous area 19, wire connection cavity 20.
1, the cable entry of kelvin effect explosion-proof electrical source terminal box is made of its ' cable is communicated with joint ', cable pressed sealing device 3, cable seal circle 4, is used to import three-core cable 2 and introduces in its wire connection cavity 20.The element ejector of kelvin effect explosion-proof electrical source terminal box is introduced anti-pitch thread section and is constituted by its ' the positive tooth connection of element saves ', element sealing ring 10, element connection joint 12, skin effect heating part head end, and ' skin-effect electric heating element 21 ' is wherein to penetrate and fix, seal and connection from the element ejector.Wherein connect that joint 12 just can play isolation, sealing, fixes, the installation effect as long as tighten element clockwise, on the contrary counterclockwise its just can play unclamp, the dismounting effect.
2, input three-core cable 2 is to enter the wire connection cavity 20 by being communicated with joint from its cable entry by cable, and it has three cores: the core of " L phase line electric wire 8 " is connected with the high temperature electric wire core 16 of skin-effect electric heating element 21 by splicing ear 9; The core of " N change electric wire 6 " is by being connected with splicing ear 9 on the ferromagnetic steel pipe 13 head end inwalls, the splicing ear 9 that the core of " S extinguishing arc electric wire 7 " of input three-core cable 2 passes through with ' being connected of wear-resisting antistatic restrictive coating 14 head ends of high temperature electric wire 22 ', they head end respectively with the phase line L and the zero line N formation series circuit of AC power 1.The alternating current direction is by the inwall of the splicing ear 9 of the tail end of the head end of AC power 1 phase line L by high temperature electric wire core 16, high temperature electric wire core 16 and ferromagnetic steel pipe 13 tail ends, ferromagnetic steel pipe 13, turns back to zero-power line N at last.The splicing ear 9 that the core of input three-core cable 2 " S extinguishing arc electric wire 7 " passes through is connected with wear-resisting antistatic restrictive coating 14 head ends of high temperature electric wire 22; pass guiding its " static " to the earth by input three-core cable 2 extinguishing arc electric wires 7 cable entries, extinguish " corona " protection high temperature electric wire 22.
3, cable pressed sealing device 3, kelvin effect explosion-proof electrical source terminal box shell 5, element connects joint 12, the material of ferromagnetic steel pipe 13 and ' cable is communicated with joint ' thereof and ' element is communicated with joint ' and lid and the calculating principle of wall thickness thereof are undertaken by the 1st of the summary of the invention of specification of the present invention, adopt the carbon steel of better economy, electrical pure iron or iron soft magnetism steel, its " skin thickness becomes " inner surface changes to decay by index law, its cross section alternating current passage along inwall from inwall to outer wall by index law change to can influence the personal safety degree come the juice calculation, its " earial drainage electric current ", " surface voltage " also considers various unfavorable safety factors, and " the actual margin of safety " of its actual wall thickness is " skin thickness becomes " three times or bigger.
4, because skin-effect electric heating element 21 uses length longer, and its operating voltage is higher, " kelvin effect explosion-proof electrical source terminal box " surface of connection is provided with " earth protective device 18 " in order to guarantee the safety on the surface that the person contacts.
5, for present embodiment is that the AC power frequency operating voltage of skin effect heating part 21 is 4 kilovolts, for its＜open, close or＜logical, disconnected〉the frequent temperature control of state and produce " corona ", solve ferromagnetic steel pipe 13 inner wall surface to a large amount of accumulation in the surface static on high temperature electric wire 16 wear-resisting antistatic restrictive coating 14 sheaths, puncture broken wear-resisting antistatic restrictive coating 14 of cup and insulating barrier 15 failure problems that gives rise to trouble, because the wear-resisting antistatic restrictive coating 14 of high temperature electric wire 22, insulating barrier 15 extrusion molding materials require high temperature resistant, high strength, high insulation, high weather-proof, ageing-resistant, especially sheet resistance is had relatively high expectations, to use in ' the cable agent plastics that temperature resistant grade is higher ', make the outer surface resistance value of its wear-resisting antistatic restrictive coating 14 be not less than 10
(8～ 9)Ω's, guide its " static " to the earth then, the protection insulating barrier.Can be in kelvin effect explosion-proof electrical source terminal box connect its wear-resisting antistatic restrictive coating 14 with lead on the head end of high temperature electric wire 22 and utilize the cable entry of input three-core cables to pass guiding its " static ", extinguish " corona " protection high temperature electric wire 22 to the earth.
6, the installation site of " kelvin effect explosion-proof electrical source terminal box " is in the head end starting point of skin-effect electric heating element 21 and near near the AC power 1, because skin-effect electric heating element is very long, general on the way difficulty finds suitable AC power 1, places such as it can only be in the oil field, large chemical plant, harbour are got not put and are handed over system power supply 1, and therefore requirement of " kelvin effect explosion-proof electrical source terminal box " rainproof out of doors, dustproof IP " degree of protection " can be got IP54～IP56.
7, the AC power frequency operating voltage of present embodiment skin effect heating part 21 is 4KV, " electric clearance ", " minimum creep distance " of three binding post 9 exposure portion in the chamber of " kelvin effect explosion-proof electrical source terminal box " reaches " classification of insulating material phase ratio creepage tracking index " will be satisfied being not less than of national explosion-proof criteria simultaneously and look definite value, and they are respectively and are not less than 80mm, 50mm and I level.
8, the maximum temperature of " kelvin effect explosion-proof electrical source terminal box " operating state be by 16 sections of ohmically generation caloric value, the high temperature electric wire cores of electric current input cable core section in its wire connection cavity 20 the generation caloric value on its AC resistance, ferromagnetic steel pipe 13 within it the temperature that causes of the generation caloric value on the contact resistance of the AC resistance of wall and three splicing ears 9 raise, and add that the safe dose of high environment is no more than the explosion-proof criteria setting of " the highest face temperature temperature of II class electric equipment is divided into groups ".
9, in very long skin-effect electric heating element 21 is between its " ferromagnetic steel pipe 13 " and " high temperature electric wire 22 ", there is the air gap, long distance has formed " interstitial cavities 14 ", when the energising heating, its expansion or shrinkage variation are flowed and are caused that the pressure breathing influences explosion-proof performance, therefore to make between " wire connection cavity 20 " of kelvin effect explosion-proof electrical source terminal box and the skin-effect electric heating element 21 both " interstitial cavities 14 " and should carry out " isolation ", promptly stretching into the head end position " ferromagnetic steel pipe 13 " of skin-effect electric heating element 21 of kelvin effect explosion-proof electrical source terminal box inner chamber and " interstitial cavities 14 " between " high temperature electric wire 21 " utilizes explosion-proof isolation clay 11 to cut off, make " wire connection cavity 20 " and " interstitial cavities 14 ", structurally guarantee the explosion-proof performance of kelvin effect explosion-proof electrical source terminal box.
According to shown in Figure 2, skin-effect electric heating element 21 be by, ferromagnetic steel pipe 13, wear-resisting antistatic restrictive coating 14, insulating barrier 15, high temperature electric wire core 16, interstitial cavities 17 constitutes, wherein high temperature electric wire 22 is by wear-resisting antistatic restrictive coating 14, insulating barrier 15, high temperature electric wire core 16 constitutes, insulating barrier 15 is coated on above the high temperature electric wire core 16, wear-resisting antistatic restrictive coating 14 be coated on again insulating barrier 15 above, " high temperature electric wire 22 " is through in " ferromagnetic steel pipe 13 ", its tail end high temperature electric wire core 16 is connected with the splicing ear 9 of ferromagnetic steel pipe 13 tail ends, they form series circuit with the phase line of AC power 1 and zero line respectively at head end, and the alternating current direction is by the phase line L of the AC power head end by high temperature electric wire 21, the splicing ear 9 of high temperature electric wire 21 tail ends and ferromagnetic steel pipe 13 tail ends, the inwall of ferromagnetic steel pipe 13, turn back to AC power 1 zero line N at last.
According to shown in Figure 3, Fig. 3 comprises for the lid partial structurtes schematic diagram of the embodiment of the invention: lid 23, sealing gasket 24, explosion suppresion surface 25, screw 26.The core 8 that connects L phase line electric wire is connected by the high temperature electric wire core 16 of splicing ear 9 with " skin-effect electric heating element 21 "; The core 6 of N change electric wire is by being connected with splicing ear 9 on " ferromagnetic steel pipe 13 " head end inwall; The splicing ear 9 that input three-core cable S extinguishing arc electric wire core 7 passes through is connected with wear-resisting antistatic restrictive coating 14 head ends of high temperature electric wire, before lid 23 lids, put sealing gasket 24 in advance then, check that explosion suppresion surface 25 correctly covers above the shell 5 again, tighten each screw 26, press the present invention behind explosive gas atmosphere hazardous area zone 19 installations diagram 3 and Fig. 1 Fig. 2, according to comprehensive above-mentioned requirement and relate to relevant specification requirement, the explosive-proof grade of " kelvin effect explosion-proof electrical source terminal box " will satisfy at least and is ExemT or ExeT or and the specification requirement of above national explosion-proof criteria.
The embodiment that below makes in conjunction with the accompanying drawings, only for ease of understanding and explanation the present invention, and be not to be limitation of the present invention and qualification, can make various forms inequality for kelvin effect explosion-proof electrical source junction box structure and anti-explosion safety method for designing, the those of ordinary skill in relevant field can also go out multiple modification and variation under the situation that does not break away from the spirit and scope of the present invention.Protection scope of the present invention is limited by each claim, comprises the various modification and the variation that fall into each claim scope, and their equivalent.
Claims (6)
1. the anti-explosion safety of a kelvin effect explosion-proof electrical source terminal box is established the juice method, comprise: AC power (1), input three-core cable (2), cable pressed sealing device (3), cable seal circle (4), shell (5), N zero-power line (6), S extinguishing arc electric wire (7), L power supply phase line (8), splicing ear (9), element sealing ring (10), explosion-proof isolation clay (11), element connects joint (12), ferromagnetic steel pipe (13), wear-resisting antistatic restrictive coating (14), insulating barrier (15), high temperature electric wire core (16), interstitial cavities (17), earth protective device (18), zone, explosive gas atmosphere hazardous area (19), wire connection cavity (20), skin-effect electric heating element (21), high temperature electric wire (22), element connects joint (12), sealing gasket (24), explosion suppresion surface (25), screw (26), wherein the cable entry of kelvin effect explosion-proof electrical source terminal box is communicated with joint by its cable, cable pressed sealing device (3), cable seal circle (4) constitutes, and is used to import three-core cable (2) and introduces in its wire connection cavity (20); The element ejector of kelvin effect explosion-proof electrical source terminal box is introduced anti-pitch thread section and is constituted by the positive tooth connection of its element joint, element sealing ring (10), element connection joint (12), skin effect heating part head end; Skin-effect electric heating element (21) is to be made of, ferromagnetic steel pipe (13), wear-resisting antistatic restrictive coating (14), insulating barrier (15), high temperature electric wire core (16), interstitial cavities (17); High temperature electric wire (22) is to be made of wear-resisting antistatic restrictive coating (14), insulating barrier (15), high temperature electric wire core (16), yet the cable entry of kelvin effect explosion-proof electrical source terminal box is used to import three-core cable (2) to be introduced in its wire connection cavity (20); It is wherein to penetrate and fix, seal and connect from the element ejector that the element ejector of kelvin effect explosion-proof electrical source terminal box is used for skin-effect electric heating element (21); The insulating barrier (15) of high temperature electric wire (22) is coated on above the high temperature electric wire core (16), wear-resisting antistatic restrictive coating (14) be coated on again insulating barrier (15) above; High temperature electric wire (22) is through in the ferromagnetic steel pipe (13), its tail end high temperature electric wire core (16) is connected with the splicing ear (9) of ferromagnetic steel pipe (13) tail end, they form series circuit with the phase line of AC power (1) and zero line respectively at head end, it is characterized in that: the shell wall thickness of kelvin effect explosion-proof electrical source terminal box and material is excellent gets " magnetic permeability " and " resistivity " for peak, make " skin thickness becomes " be book, realize the lowest economic cost.
2. the anti-explosion safety of kelvin effect explosion-proof electrical source terminal box according to claim 1 is established the juice method, it is characterized in that: kelvin effect explosion-proof electrical source terminal box shell wall thickness, cable pressed sealing device (3), element connect joint (12), lid (23), cable to be communicated with calculating that joint, the positive tooth of element be communicated with joint are " skin thickness becomes " three times or bigger at least.
3. the anti-explosion safety of kelvin effect explosion-proof electrical source terminal box according to claim 1 is established the juice method, it is characterized in that: the core of L phase line electric wire (8) is connected with the high temperature electric wire core (16) of skin-effect electric heating element (21) by splicing ear (9); The core of N change electric wire (6) is by being connected with splicing ear (9) on ferromagnetic steel pipe (13) the head end inwall, the splicing ear (9) that the core of S extinguishing arc electric wire (7) of input three-core cable (2) passes through is connected with wear-resisting antistatic restrictive coating (14) head end of high temperature electric wire (22), they head end respectively with the phase line L and the zero line N formation series circuit of AC power (1).
4. the anti-explosion safety of kelvin effect explosion-proof electrical source terminal box according to claim 1 is established the juice method; it is characterized in that: " static " on wear-resisting antistatic restrictive coating (14) surface utilizes the S extinguishing arc electric wire (7) that passes cable entry input three-core cable (2) to guide its " static " to the earth, extinguishes " corona " protection high temperature electric wire (22).
5. the anti-explosion safety of kelvin effect explosion-proof electrical source terminal box according to claim 1 is established the juice method, its spy is: the interstitial cavities (14) between its wire connection cavity (20) and skin-effect electric heating element (21) high temperature electric wire (21) and ferromagnetic steel pipe (13), utilize explosion-proof isolation clay (11) to cut off, make wire connection cavity (20) and interstitial cavities (14), structurally guarantee the explosion-proof performance of kelvin effect explosion-proof electrical source terminal box.
6. the anti-explosion safety of kelvin effect explosion-proof electrical source terminal box according to claim 1 is established the juice method, it is characterized in that: shell (5) surface is provided with " earth protective device ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910164587A CN101719645A (en) | 2009-07-17 | 2009-07-17 | Anti-explosion safety design method of skin-effect anti-explosion power supply junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910164587A CN101719645A (en) | 2009-07-17 | 2009-07-17 | Anti-explosion safety design method of skin-effect anti-explosion power supply junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101719645A true CN101719645A (en) | 2010-06-02 |
Family
ID=42434180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910164587A Pending CN101719645A (en) | 2009-07-17 | 2009-07-17 | Anti-explosion safety design method of skin-effect anti-explosion power supply junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101719645A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015014231A1 (en) * | 2013-07-31 | 2015-02-05 | 珠海格力电器股份有限公司 | Wiring mechanism, permanent magnet speed regulation motor and centrifugal type refrigeration compressor |
| CN106060986A (en) * | 2016-07-25 | 2016-10-26 | 无锡大洋高科热能装备有限公司 | Skin effect heating device for built-in skin effect pipe |
| CN109458652A (en) * | 2018-05-02 | 2019-03-12 | 天津市贝塞尔科贸有限公司 | A kind of collection skin current vortex heat supply, heating system |
| CN111619207A (en) * | 2020-06-25 | 2020-09-04 | 陈辉 | Pyrography machine transfer method based on thermal sublimation process |
| CN114952805A (en) * | 2022-07-29 | 2022-08-30 | 沈阳佰奥特种机器人有限公司 | Explosion-proof joint robot device |
-
2009
- 2009-07-17 CN CN200910164587A patent/CN101719645A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015014231A1 (en) * | 2013-07-31 | 2015-02-05 | 珠海格力电器股份有限公司 | Wiring mechanism, permanent magnet speed regulation motor and centrifugal type refrigeration compressor |
| US9831741B2 (en) | 2013-07-31 | 2017-11-28 | Gree Electrical Appliances, Inc. Of Zhuhai | Terminal mechanism, permanent magnet adjustable-speed motor and centrifugal refrigeration compressor |
| CN106060986A (en) * | 2016-07-25 | 2016-10-26 | 无锡大洋高科热能装备有限公司 | Skin effect heating device for built-in skin effect pipe |
| CN109458652A (en) * | 2018-05-02 | 2019-03-12 | 天津市贝塞尔科贸有限公司 | A kind of collection skin current vortex heat supply, heating system |
| CN111619207A (en) * | 2020-06-25 | 2020-09-04 | 陈辉 | Pyrography machine transfer method based on thermal sublimation process |
| CN114952805A (en) * | 2022-07-29 | 2022-08-30 | 沈阳佰奥特种机器人有限公司 | Explosion-proof joint robot device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101719645A (en) | Anti-explosion safety design method of skin-effect anti-explosion power supply junction box | |
| CN202871392U (en) | Environmental-friendly and cleaning type high-voltage flame-resistant power cable | |
| CN101740210A (en) | Amorphous alloy 20kV underground transformer | |
| CN202275657U (en) | Electrified railway 27.5kV single phase alternating current ethylene-propylene insulating cable | |
| CN204204497U (en) | The automobile-used high-tension cable of high-speed track | |
| CN103915194A (en) | Low-smoke and halogen-free fireproof double-shielded cable resistant to high temperature | |
| CN208874255U (en) | A kind of high-voltage cable middle joint protecting crust of double casing | |
| CN102122051A (en) | Tracking resistant polyethylene sheath material for ADSS optical cable | |
| CN208874252U (en) | A kind of plate partitioned compartment type high-voltage cable middle joint protecting crust | |
| CN204360817U (en) | A kind of isolated form steel-tape armouring fire-resisting cable | |
| CN105023631A (en) | Stainless steel mineral-insulated cable | |
| CN206574528U (en) | The coaxial composite plastic insulated cable of below 35kV copper core aluminium cores | |
| CN206639629U (en) | A kind of ethylene propylene rubber insulated halide-free low-smoke fireproof cable | |
| CN206516397U (en) | A kind of environmentally friendly proof antistatic water power line | |
| CN205809144U (en) | A kind of operating side electric current dual pathways isolated gate | |
| CN201364769Y (en) | High and low temperature resistant, highly oil resistant, environment-friendly, flame retardant and refractory railway locomotive cable | |
| CN215577765U (en) | Novel environment-friendly high-flame-retardant carbon fiber woven flexible fireproof cable | |
| CN215600894U (en) | Low-voltage protection device for mining explosion-proof and intrinsically safe transformer | |
| CN216672568U (en) | High-voltage cable with fusing protection | |
| CN104575780A (en) | Refractory power flexible cable | |
| CN202940205U (en) | Fuse having sleeve structure | |
| CN205811521U (en) | A kind of test side switching value dual pathways isolated gate | |
| CN202084330U (en) | Through ground wire used in railway integrated grounding system | |
| CN204360818U (en) | A kind of isolated form stainless steel band armored fire-resistant cable | |
| CN208489015U (en) | A kind of environment-friendly type track feeder line flame retardant cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100602 |