CN202094557U

CN202094557U - Groove briquette type electrical equipment wiring device

Info

Publication number: CN202094557U
Application number: CN2010205531150U
Authority: CN
Inventors: 王远贞
Original assignee: ZHEJIANG TIANYUAN MINE EQUIPMENT Co Ltd
Current assignee: ZHEJIANG TIANYUAN MINE EQUIPMENT Co Ltd
Priority date: 2010-09-26
Filing date: 2010-09-26
Publication date: 2011-12-28
Anticipated expiration: 2020-09-26

Abstract

The present utility model relates to a groove briquette type electrical equipment wiring device which is a round structure. Conductive parts are wrapped by insulation materials. The connection between a conducting wire and the wiring device is completed by stripping an outer insulation layer off a wiring head and directly arranging the wiring head into a groove which is provided with an outward opening. The connection is compacted by screwing compression bolts tightly and utilizing briquettes, and nuts (prepared caps) are used to prevent the connection from loosening. The groove briquette type electrical equipment wiring device can be used in various electrical conjunction boxes and wiring chambers specially used for explosion-proof electric equipments. Compared with the traditional screw type and fork type wiring devices, the novel device is simple and rapid in wiring operation, the electrical connection is reliable, and the conductive effect is good. The burning loss of the wiring device caused by loose connection can be avoided. The influence of the electrical gap and the creep distance will not be deemed as the main considering factor in designing electrical equipments, and the volumes of the electrical equipments can be reduced relatively. Thus small volume and light weight of equipment can be realized, steels can be saved, and economic benefits can be created.

Description

Groove pressing block type electric equipment termination

Affiliated technical field

The utility model relates to electric and the explosion-proof electrification technical field, exactly is a kind of novel electric equipment termination.

Background technology

The present electric equipment and the termination of all kinds of terminal boxes are three types substantially: i.e. screw as shown in Figure 1, fork formula as shown in Figure 2, composite type as shown in Figure 3; The relevant standard of country and industry was also made specified in more detail (seeing JB4002-1992 " flame-proof mine low-voltage electrical apparatus binding post ") to it.Because the composite type termination is used for the assist control circuit of the little electric current of low-voltage more, and version is better, practical function is fair; But to screw and these two kinds of terminations of fork formula, be the main line that is used for high voltage and big electric current, though be extensive use of for many years, but still have a lot of drawbacks.And these drawbacks in big electric current and high voltage electric apparatus, are had outstanding performance.In the screw termination as shown in Figure 1,7 of the wiring of cable (electric wire) are connected with termination conductive lever 2, clamp with upper clipping claw 6 and following claw 8.And power lug 7 must be made circular sleeve for being fit to cooperating of circular screw rod.In order to conduct electricity good and to prevent because the loosening termination that causes of wiring burns, except will tightening spring pad 4, the more important thing is needs butt joint the end of a thread 7 carefully to process, and generally all will be made into circular standard connector lug as shown in Figure 5.This circular standard connector lug is processed comparatively loaded down with trivial details at the scene, the general technology process is: 1 divests

core insulation rubber

1,2. at the end of a thread root

wrap wire neck

2,3. heart yearn half-and-half separately and is relatively inserted, the preliminary round wire cover of coiled is 4. pinched the outer unnecessary filament of preliminary round wire cover of coiled earlier, use single or bifilar filament 4 then, carry out uniform winding by round wire cover circumference,, 5. at last whole round wire cover 3 is carried out finishings such as deburring until being connected with the line neck 2 of root.In addition, when such termination was used for as shown in Figure 4 the special-purpose wiring of electric apparatus for explosive gas chamber 1, the transmission of electric current will pass through conductive lever 5, and major part will be undertaken by claw 10 down, and the current lead-through contact area is less like this, and effect is understood bad; For conducting effective, at the scene in the operation, will do last connector lug 9 round wire cover internal diameter to such an extent that be slightly less than the external diameter of conductive lever 5, in the time will going up connector lug 9 round wire covers and be inserted in screw rod 5, outline hard " support " is entered, and could guarantee that like this electric current is most by the contact-making surface of connector lug 9 round wire cover with conductive lever 5 outer rims, has increased the contact area of conduction, guarantee that conduction is good, this has then more increased the difficulty of operation undoubtedly.Usually, the execute-in-place person is fast and convenient for wiring, makes " sluggard's cover " and easy the end of a thread of " little parted hair " class shown in (2) shown in (1) among Fig. 6, also seldom makes the smaller the sort of line cover of line cover internal diameter even make circular connector lug.Facts have proved that for many years this is the main cause that causes the frequent scaling loss of termination and all kinds of electric accidents take place even bring out electric spark ignition and blasting serious accident.In addition, the compressing method that contacts of connector lug 9 and screw rod 5 on the lead of screw termination as shown in Figure 4, is by the screwing of nut 6, dead spring pad 7 downwards, and realize by upper clipping claw 8 and following claw 10.Nut 6 can be subjected to the influence of spring pad 7 counter-forces when being screwed down, and causes easily in the fracture that screws process medi-spring pad 7, and directly influence compresses effect; Simultaneously, because of upper clipping claw 8 very thin thickness, generally only be 1-2.5mm, when not making the smaller round wire of internal diameter and put connector lug 9, when nut 6 spins down tension, can cause upwards outer perk phenomenon of upper clipping claw 8 edges, this equally also can influence electric conductivity.Moreover, because screw rod 5 is exposed to place airbornely, in the electric equipment design, especially in product design, at first will consider the electric clearance shown in A among the figure and the requirement of the creepage distance shown in B among the figure to all kinds of electrical apparatus for explosive atmospheres; In order to satisfy the requirement of this respect, then metal outer wall (shell) physical dimension etc. to the arranging of each termination position, equipment then has strict restriction.Especially for as 3-6 kilovolt and above electric equipment, because voltage is higher, its corresponding electric clearance and creepage distance require then higher (as the 10KV electric equipment, anti-when letting out trace coefficient insulating material with 2 grades, require electric clearance to be not less than 100mm, creepage distance is not less than 140mm), certainly will cause the electric equipment outer volume excessive, overweight like this, the not only on-the-spot carrying inconvenience of using, and to use steel more, this all is not calculate in processing and fabricating and product cost and economic benefit accounting; As for fork formula termination as shown in Figure 2, though when wiring, be not used as circular standard the end of a thread, compare with the screw termination, simple during the field connection operation, but this device lead connector lug 6 contacts with conducting block 7, only is the surface of upper end one rectangle of conducting block 7, (during the maximum M20 specification bolt stipulated in the JB4002-1992 standard, it is less with conducting block 7 effective contact surfaces that terminal 6 compresses the back, and its bonding length only is 26mm).The screw rod 2 of conducting block 7 both sides, nut 3 and pressing plate 5 only dock the end of a thread 6 main pressuring actions that rise, and mainly do not play conduction current, obviously, the cross section of its effective conduction current is little, be unfavorable for the conducting of electric current, especially when electric current is big, easily cause temperature rise too high.In addition, because screw rod 2, conducting block 7, pressing plate 5 also are exposedly to place airbornely, threaded formula termination is the same, does not still overcome with because of the requirement of electric clearance and the creepage distance drawback to the equipment volume restriction.

Summary of the invention

In order to overcome the drawback of existing two kinds of terminations, order of the present utility model ground just provides a kind of novel electrical wiring device, it can be used for all kinds of electrical junction boxes, also can be used for the special-purpose wiring of electrical apparatus for explosive atmospheres chamber, at the scene in the wiring operation convenient and fast, be connected reliably, conductive effect is good; And can in electrical design, not classify the influence of electric clearance creepage distance as the factor of overriding concern.The outer wall of electric equipment (shell) can be done much smallerly relatively, realizes that the electric equipment volume is little, in light weight, saves steel, creates economic benefit.

The main feature of novel electrical wiring device of the present utility model is: 1. when termination was used in all kinds of electrical junction boxes, configuration was cylindrical.The outside is an insulating base 1.Insulating base 1 is except that staying a corresponding gap of the groove with conducting block 8 to introduce the connector lug 14, and insulating base 1 is parcel conducting block 8 all.Insulating base 1 and the integral piece of electric piece 8 for compacting.For ease of wiring, the bottom surface of insulating base 1 outside gap will be lower than the not little 10mm of conducting block 8 groove floor; For satisfying the requirement of creepage distance, convex-concave shape up-small and down-big, the parallel distribution in three roads " muscle " is arranged on insulating base 1 outer surface; For satisfying the requirement of electric clearance and intensity, insulating base 1 top exceeds cover plate 2 upper surfaces and is not less than 5mm, and the wall thickness that exceeds partly is not less than 5mm; Insulating base 1 material is selected, 6000 volts and more than employing DMC-1 unsaturated polyurethanes plastics make.Insulating base 1 bottom surface has thickness to be not less than 5mm rubber damper 11, and is connected with firm banking 12 by screw.Baltimore groove is arranged in order to place connector lug 14 on the conducting block 8.Baltimore groove on the conducting block 8 is in-line upwards or is cross; Conducting block 8 upper surfaces are provided with 2 M4 screws, in order to securing cover plate 2; 2 circular nose bars are arranged at conducting block 8 bottoms, rotate when in use stressed in order to preventing; There is the circular lead angle that is not less than 20 degree in exit, conducting block 8 groove both sides, so that connector lug 14 is from the introducing of all directions; Conducting block 8 bottom portion of groove are circular, and radius is not less than 5mm, so that the installation of connector lug 14 and raising conductive effect.Compressing of connector lug 14 is to rely on screwing off of hold-down bolt 5, and finish by 7 times in-migrations of briquetting.Briquetting 7 profiles are identical with the groove topography of conducting block 8, are in-line or cross, and thickness is not less than 10mm, briquetting 7 two ends outer rims have with conducting block 8 recess outlet place lead angle kissings and circular lead angle; In briquetting 7, be provided with the convex form inside groove that matches with hold-down bolt 5 terminations.Cover plate 2 thickness are not less than 10mm; The hole of 2 diameter 5mm on the cover plate 2 is not more than 0.10mm with 2 M4 screws of conducting block 8 upper surfaces concentricity, so that the correct assembling of cover plate 2 and conducting block 8.The preventing of connector lug 14 become flexible, and is to be screwed off by hold-down bolt 5, and after compressing connector lug 14 by briquetting 7, tightens that cap nut 6 fully finishes again.2. when termination is used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, except that having aforesaid characteristics, also to make and go up insulating base 7 and following insulating base 21 and conducting block 8 as shown in Figure 8 according to the relevant requirements of electrical explosion proof.The cooperation of insulating base 7 and following insulating base 21 and fastening is finished by plain cushion 16, spring pad 17, nut 20.Following insulating base 21 outer walls one side has the groove gap, in order to the lead of lead-in nose 19, carries out the chamber inside conductor and connects.For the requirement of satisfying electric clearance be convenient to wiring, it is opposite that the groove gap direction of twice adjacent insulating bases 21 is wanted.Conducting block 8 first halves are cylindrical structural, and there is the in-line groove of the upward opening that is provided with by size of current the top.For ease of the introducing of connector lug 13 from all directions, there is the circular lead angle that is not less than 20 degree in exit, groove both sides; Bottom portion of groove is circular, and radius is not less than 5mm, so that the installation of connector lug 13 and raising conductive effect; Conducting block 8 Lower Halves are the screw structure, utilize nut 20, spring pad 17, fastening line nose 19 is installed, and finish the special-purpose wiring chamber 23 of electrical apparatus for explosive atmospheres and being electrically connected of main chamber 2.Following insulating base 21 matches with last insulating base 7, is the circle nested structure.For satisfying electric clearance and being convenient to the requirement of wiring, following insulating base 21 bottom outer walls are the guard ring formula.The guard ring internal diameter is greater than line nose 19 external diameter 5mm, and the guard ring height exceeds conducting block 8 bottom screw tip and is not less than 5mm,, guard ring one side has corresponding gap by the diameter of 19 wire connecting of line nose, and the guard ring wall thickness is not less than 5mm.

The utility model for the technical scheme that solution screw, fork formula termination existing problems are adopted is: changed the way of contact partly of lead connector lug and termination conduction 1..The circular conducting block 8 of employing shown in Fig. 7-1 or Fig. 7-2 replaces the conductive lever of screws and fork formula termination, mills by size of current at conducting block 8 centers and cuts the upward opening groove, in order to place connector lug 14; Enter groove from different directions for the ease of a plurality of connector lugs, groove can be a word or cross, and there is the circular lead angle that is not less than 20 degree in exit, groove two ends; In physical cabling operation, as long as wire insulation rubber is divested, stay certain-length, directly be placed into to compress in conducting block 8 upper grooves and get final product.This has just been avoided the screw termination need do the loaded down with trivial details operation of circular standard connector lug as shown in Figure 5, has fundamentally solved the way of contact partly of lead connector lug and termination conduction, has simplified method of operation, has improved efficient; 2. changed " containing " mode of lead connector lug 7 in the screw termination, reaching down by former dependence upper clipping claw 6, claw 8 contains lead connector lugs 7, change the whole mode that contains connector lug 14 of the groove by conducting block 8 shown in Fig. 7-1, Fig. 7-2 into, this has just strengthened the contact area of conduction, be convenient to the conducting of electric current, and make the conduction firm and reliable connection, and can avoid the overheated of termination effectively and burn; The overall construction design of conducting block 8 has satisfied penetrating and relevant technologies requirement such as reasonable conducting of placement, electric current, structural strength of each connector lug.3. changed the compressing method of terminal.By screw termination shown in Figure 1 by the screwing of nut 3, dead spring pad 4 and compress downwards by upper clipping claw 6 and following claw 8, change into and lean on M8 hold-down bolt 5 to screw off shown in Fig. 7-1, Fig. 7-2, compress the method for connector lug 14 by briquetting 7.In order to make briquetting 7 energy and hold-down bolt 5 liftings simultaneously, be convenient to penetrating of connector lug 14, in briquetting 7, be provided with the convex inside groove that matches with hold-down bolt 5 terminations.Compress the change of mode, the nut 3 that has overcome screw easily causes the fracture of spring pad 4, upper clipping claw 6 edges to stick up phenomenon outside making progress in being screwed down process; For solve between bareing conductive lever, the conducting block and conductive lever, conducting block to electric clearance A, the creepage distance B of metal outer wall (shell) problem to the restriction and the influence of electric equipment overall volume, in conducting block 8 outsides " parcel " insulating base 1.Insulating base 1 upper end exceeds cover plate 2 upper surfaces and is no less than 5mm.Insulating base 1 not only plays fixedly conducting block 8 effects, and can " separate " between each conducting

block

8 and 8 pairs of metal outer wall of conducting block (shell) 13.5. for the problem of the electric clearance of 5 pairs of lids 16 of M8 hold-down bolt of solving novel termination, hold-down bolt 5 outsides " parcel " insulating barrier, i.e. hold-down bolt 5 and the integral piece of external insulation layer for compacting; And making protection hold-down bolt 5 outer surface insulating barriers do not damage and are convenient to the socket wrench specially adapted for it as shown in figure 17 of on-the-spot use.By above improved novel termination, in electric equipment and the design of all kinds of terminal box, can be consider earlier termination arranging and with the electric clearance influencing factor of metal outer wall (shell) 13, and go mainly to consider that operating maintenance is convenient, the factors such as heat radiation of termination.This has just solved the restriction to equipment volume basically.In order to satisfy the requirement of creepage distance and easy-to-connect, conducting block 8 groove floor will exceed insulating base 1 outside gap bottom surface and be not less than 10mm; The plane that conducting block 8 tops contact with insulating base 1 will be lower than insulating base 1 outside gap bottom surface and be not less than 10mm.When this new arrangement device, when being used for the special-purpose wiring of electrical apparatus for explosive atmospheres chamber as shown in Figure 8, except that adopting aforesaid 1-5 bar technical measures, also to make and go up insulating base 7 and following insulating base 21 as shown in Figure 8 by explosion-proof relevant requirement.The two cooperation and fasteningly finish by plain cushion 16, spring pad 17, nut 20.Following insulating base 21 outer walls one side has the groove gap, and in order to the lead of lead-in nose 19, adjacent two groove gap directions are opposite.

The beneficial effects of the utility model are to make things convenient for fast in the site of deployment wiring operation, save time.Through on-site assessment, contrast former screw termination, can shorten 2.5 times of wiring operating times; And conductive effect is good, solid and reliable.Can avoid frequent scaling loss of termination and all kinds of electric accident effectively even bring out the generation of electric spark ignition and blasting serious accident; And can make the overall volume of electric equipment dwindle 1 times relatively, and make that equipment volume reduces, weight saving, save steel, create economic benefit.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is screw termination structure, wiring, electric clearance, creepage distance and is used in schematic diagram in the electrical junction box.Among the figure: 1. terminal box outer wall (shell), 2. screw rod, 3. nut, 4. spring washer, 5. plain washer, 6. upper clipping claw, 7. connector lug 8. descends claw, 9. insulating base, 10. set bolt, the spring washer of 11. set bolts, 12. fastening bolts, 13. loam cake, 14. the spring washer of fastening bolt, A. electric clearance, B. creepage distance.

Fig. 2 is fork formula termination structure, wiring, electric clearance, creepage distance and is used in schematic diagram in the electrical junction box.Among the figure: 1. wiring chamber outer wall (shell), 2. screw rod, 3. nut, 4. spring washer, 5. pressing plate, 6. connector lug, 7. conducting block, 8. insulating base, 9. set bolt, 10. the spring washer of set bolt, 11. fastening bolt, 12. loam cakes, the spring washer of 13. fastening bolts, A. electric clearance, the B. creepage distance.

Fig. 3 is composite type termination structure, wiring, electric clearance, creepage distance and the schematic diagram when being used for electrical apparatus for explosive atmospheres as special-purpose wiring chamber.Among the figure: 1. metal outer wall (shell), 2. terminal block (dividing plate) is 3. gone up insulating cell, 4. screw, 5. spring washer, 6. plain washer is 7. gone up connector lug, 8. plays insulating cell, 9. nut, 10. descend connector lug, 11. screw rods, A. electric clearance, B. creepage distance (the figure bottom does not mark).

Fig. 4 is the schematic diagram of screw termination when being used for electrical apparatus for explosive atmospheres as special-purpose wiring chamber.Among the figure; 1. main chamber, 2. wiring chamber, 3. metal outer wall (shell), 4. securing member, 5. screw rod, 6. nut, 7. spring pad, 8. upper clipping claw is 9. gone up connector lug, 10. descends claw, 11. last insulating cell, 12. terminal blocks (dividing plate), 13. times insulating cells, 14. plain washers, 15. times connector lugs.16. electric component, 17. wiring mouths, A. electric clearance, B. creepage distance (the figure bottom does not mark).

Fig. 5 is the circular standard sleeve schematic diagram that the screw termination is suitable for.Among the figure: 1. lead heart yearn rubber, 2. line cover " neck ", 3. round wire cover, 4. strand coiling silk.

Fig. 6 is two kinds of easy sleeve schematic diagrames that the screw termination is used.Among the figure: (1). " sluggard's cover ": 1. lead heart yearn rubber, 2. line cover; (2). " little parted hair ": 3. lead heart yearn rubber, 4. line cover.

Fig. 7-the 1st, new recess pressing block type electric equipment termination (in-line groove) is used for the schematic diagram of electrical junction box wiring.Among the figure: 1. insulating base, 2. cover plate, 3. screw M4,4. spring pad M4,5. hold-down bolt M8,6: nut M8,7. briquetting, 8. conducting block, 9. screw M8,10. spring pad M8,11. cushion blockings, 12. termination firm bankings, 13. wiring chamber outer wall (shell), 14. connector lugs, 15. securing members, 16.. lid, 17. cables (electric wire) heart yearn, 18. wiring mouths, 19. cable (electric wire), A. electric clearance, B. creepage distance.

Fig. 7-the 2nd, new recess pressing block type electric equipment termination (cross groove) is used for the schematic diagram of electrical junction box wiring.Among the figure: 1. insulating base, 2. cover plate, 3. screw M4,4. spring pad M4,5. hold-down bolt M8,6. nut M8,7. briquetting, 8. conducting block, 9. screw M8,10. spring pad M8,11. cushion blockings, 12. termination firm bankings, 13. wiring chamber outer wall (shell), 14. connector lugs, 15. securing members, 16.. lid, 17. cables (electric wire) heart yearn, 18. wiring mouths, 19. cable (electric wire), A. electric clearance, B. creepage distance.

Fig. 8 is the schematic diagram that new recess pressing block type electric equipment termination is used for the special-purpose wiring of electrical apparatus for explosive atmospheres chamber.Among the figure: 1. electric component, 2. main chamber, 3. wiring chamber outer wall (shell), 4. wiring mouth, 5. loam cake, 6. securing member, 7. go up insulating base, 8. conducting block, 9. hold-down bolt M8,10. nut M8,11 briquettings, 12. cover plates, 13. connector lug, 14.. screw M4,15. spring pad M4,16. plain cushion M16,17. spring pad M16,18. insulation rubber, 19. line nose, 20. insulating base under the nut M16.21., 22. terminal blocks (dividing plate), wiring chambers 23., 24. screw rod M16,25. loam cake 5 bottom surfaces, A. electric clearance, B. creepage distance.

Fig. 9-the 1st, new recess pressing block type electric equipment termination (in-line groove) are used for the insulating base 1 part schematic diagram of electrical junction box.

Fig. 9-the 2nd, new recess pressing block type electric equipment termination (cross groove) are used for the insulating base 1 part schematic diagram of electrical junction box.

Figure 10-the 1st, new recess pressing block type electric equipment termination (in-line groove) are used for the cover plate 2 part schematic diagrames of electrical junction box.

Figure 10-the 2nd, new recess pressing block type electric equipment termination (cross groove) are used for the cover plate 2 part schematic diagrames of electrical junction box.

Figure 11-the 1st, new recess pressing block type electric equipment termination (in-line groove) are used for the briquetting 7 part schematic diagrames of electrical junction box.

Figure 11-the 2nd, new recess pressing block type electric equipment termination (cross groove) are used for the briquetting 7 part schematic diagrames of electrical junction box.

Figure 12-the 1st, new recess pressing block type electric equipment termination (in-line groove) are used for the conducting block 8 part schematic diagrames of electrical junction box.

Figure 12-the 2nd, new recess pressing block type electric equipment termination (cross groove) are used for the conducting block 8 part schematic diagrames of electrical junction box.

Figure 13 is that new recess pressing block type electric equipment termination is used for insulating base 7 part schematic diagrames on the special-purpose wiring of the electrical apparatus for explosive atmospheres chamber.

Figure 14 is that new recess pressing block type electric equipment termination is used for insulating base 21 part schematic diagrames under the special-purpose wiring of the electrical apparatus for explosive atmospheres chamber.

Figure 15 is that new recess pressing block type electric equipment termination is used for the special-purpose wiring of electrical apparatus for explosive atmospheres chamber conducting block 8 part schematic diagrames.

Figure 16 is among Fig. 7-1, Fig. 7-2, Fig. 8 of new recess pressing block type electric equipment termination, M8 fastening bolt part schematic diagram.

Figure 17 is supporting specific purpose tool (vertical sleeve) schematic diagram of new recess pressing block type electric equipment termination.

Embodiment

Execution mode 1, groove pressing block type electric equipment termination by new technical scheme manufacturing processing, when being used for shown in Fig. 7-1 and Fig. 7-2 electrical junction box, adopt the conduction part of circular conducting block 8 as termination, the groove that cuts upward opening is milled by size of current in center at conducting block 8, groove can for a word shown in Fig. 7-1 or shown in Fig. 7-2 cross; There is the circular lead angle groove that is not less than 20 degree in the exit, two ends, and the lower end well is made into the circle that radius is not less than 5mm for ease of the placement and the conduction of connector lug; Conducting block 8 is a cylindrical structural, and material is not less than H62 brass; The mode that compresses of connector lug 14 is backing out of pressured tight bolt 5, and moves down by briquetting 7, and connector lug 14 realizes until compressing; In briquetting 7, be provided with the convex inside groove that matches with hold-down bolt 5 terminations; The preventing of connector lug 14 become flexible, and takes the form of cap fully, is to tighten downwards by M8 nut 6, realizes until the upper surface of being close to cover plate 2; Insulating base 1 profile is cylindrical, and except that staying a gap corresponding with conducting block 8 grooves to introduce the connector lug 14, all the other all wrap up conducting block 8; Be pressed into insulating base 1 after conducting block 8 fine finishining, the two is an integral piece.Insulating base 1 upper end is the specification requirement of satisfying electric clearance, and outer wall will exceed cover plate 2 upper surfaces and be not less than 5mm, and exceeding partly, wall thickness is not less than 5mm; Hold-down bolt 5 outsides " parcel " insulating barrier, the insulating barrier of hold-down bolt 5 and its outer surface is the integral piece of compacting; For satisfying the specification requirement of creepage distance, insulating base 1 outer surface will make convex-concave shape up-small and down-big, the parallel distribution in three roads " muscle "; Conducting block 8 groove floor will exceed insulating base 1 outside gap bottom surface and be not less than 10mm; The plane that conducting block 8 tops contact with insulating base 1 will be lower than insulating base 1 outside gap bottom surface and be not less than 10mm.Insulating base 1 material is selected, and when 1000 volts of following low voltages, adopts to be not less than 2 grades of anti-are-tight class plastics of trimerization eyeball amine asbestos of letting out the trace coefficient; When 6000 volts and above high voltage, adopt DMC-1 unsaturated polyurethanes plastic production.For preventing the vibration damage termination, be provided with the rubber damper 11 that thickness is not less than 5mm at insulating base 1 and 12 of firm bankings.When wiring is operated at the scene, shown in Fig. 7-1 or Fig. 7-2, back out 2 hold-down screws 3 on the cover plate 2 earlier, take down cover plate 2, place connector lug 14 (when being used for the multiply connector lug, can arrange up and down successively) to groove, cover cover plate 2, tighten the hold-down screw 3 of cover plate 2, back out hold-down bolt 5 again, until compressing connector lug 14.Tighten locking M8 nut 6 at last.Promptly finish wiring.

Execution mode 2, groove pressing block type electric equipment termination by new technical scheme manufacturing processing, when being used for the special-purpose wiring of electrical apparatus for explosive atmospheres chamber as shown in Figure 8, by requirement of explosion proof, insulating base 7 and following insulating base 21 in the making, the two cooperation and fasteningly finish by plain cushion 16, spring pad 17, nut 20.Following insulating base 21 walls one side has groove, in order to the lead of lead-in nose 19; Last insulating base 7 and the integral piece of conducting block 8 for compacting.Conducting block 8 bottoms are screw structure as shown in figure 12, in order in the main chamber 2 with being connected of electric component 1.Conducting block 8 central upper portion are milled the groove that cuts upward opening by size of current.The groove lower end is the circle that radius is not less than 5mm; The mode that compresses of connector lug 13, prevent loosening method, all identical with execution mode 1.When wiring is operated at the scene, as shown in Figure 8, the last insulating base 7 and the conducting block 8 that are pressed into integral piece are stretched into terminal block (dividing plate) through hole, be inserted in down insulating base 21, and, again line nose 19 (wiring packing ring) is inserted in screw rod 24 with plain cushion 16, spring pad 17, nut 20 fastening (direction of two adjacent line apparatus insulating base 21 open recess, relatively inaccurate), and insulation rubber 18 is entered down in the lateral grooves of insulating base 21 walls, with nut 20, spring pad 17 it is compressed.The field connection operation of wiring chamber, top is identical with execution mode 1.

Claims

1. electric equipment groove pressing block type electric equipment termination, can be used in all kinds of electrical junction boxes, the special-purpose wiring chamber that also can be used for electrical apparatus for explosive atmospheres, as being electrically connected of cable and electric equipment, it comprises electric equipment metal outer wall and termination, it is characterized in that: when termination is used in all kinds of electrical junction boxes, configuration is cylindrical, the outside is insulating base (1), edge seat (1) profile is circular, except that staying a gap corresponding to introduce the connector lug (14) with conducting block (8) groove, all wrap up conducting block (8), Baltimore groove is arranged in order to place connector lug (14) on the conducting block (8), Baltimore groove is in-line or is cross, compressing of connector lug (14) relies on screwing off of hold-down bolt (5), and moves down by briquetting (7) and to finish; When termination is used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, last insulating base (7) and following insulating base (21), be fastenedly connected by plain cushion (16), spring pad (17), nut (20), following insulating base (21) outer wall one side has gap, last insulating base (7) and the integral piece of conducting block (8) for compacting, conducting block (8) bottom is the screw structure.

2. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in all kinds of electrical junction boxes, it is characterized in that: insulating base (1) and the integral piece of electric piece (8) for compacting, conducting block (8) groove floor exceeds insulating base (1) and outwards is not less than 10mm in the gap bottom surface, the plane that conducting block (8) contacts with insulating base 1, be lower than insulating base (1) and outwards be not less than 10mm in the gap bottom surface, insulating base (1) outer surface has up-small and down-big, the convex-concave shape " muscle " of the parallel distribution in three roads, insulating base (1) top exceeds cover plate (2) upper surface and is not less than 5mm, exceeding partly, wall thickness is not less than 5mm, insulating base (1) material is selected, at 6000 volts and above employing DMC-1 unsaturated polyurethanes plastic production, insulating base (1) bottom surface has thickness to be not less than the 5mm rubber damper, and is connected with firm banking by screw.

3. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in all kinds of electrical junction boxes, it is characterized in that: conducting block (8) is a cylindrical structural, there is the groove of upward opening conducting block (8) top by size of current, groove shapes is in-line or cross, 2 circular nose bars are arranged at the bottom, conducting block (8) upper surface is provided with 2 M4 screws, there is the circular lead angle that is not less than 20 degree in exit, conducting block (8) groove both sides, bottom portion of groove is circular, and radius is not less than 5mm.

4. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in all kinds of electrical junction boxes, it is characterized in that: briquetting (7) profile is identical with conducting block (8) upper grooves profile, be in-line or cross, thickness is not less than 10mm, the two ends outer rim have with conducting block (8) recess outlet place lead angle kissing and circular lead angle, be provided with the convex form inside groove that matches with hold-down bolt (5) termination in briquetting (7), hold-down bolt (5) is the integral piece of compacting with the insulating barrier on surface.

5. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in all kinds of electrical junction boxes, it is characterized in that: cover plate (2) thickness is not less than 10mm, the hole of 2 diameter 5mm on the cover plate (2) is not more than 0.10mm with 2 M4 screws of conducting block (8) upper surface concentricity.

6. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in all kinds of electrical junction boxes, it is characterized in that: hold-down bolt (5) compresses connector lug (14) by briquetting (7), and the preventing of its connector lug become flexible, and finishes by being equipped with cap nut (6).

7. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, it is characterized in that: go up insulating base (7) and be the whole up big and down small column type structure that contains conducting block (8), outer surface of upper has convex-concave shape up-small and down-big, the parallel distribution in three roads " muscle ", insulating base (7) top wall thickness is not less than 5mm, highly surpass cover plate (12) and be not less than 5mm, bottom round bar part internal diameter is suitable for penetrating of conducting block (8) bottom screw rod.

8. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, it is characterized in that: go up insulating base (7) and the integral piece of conducting block (8) for compacting, conducting block (8) groove floor exceeds insulating base (1) and outwards is not less than 10mm in the gap bottom surface, conducting block (8) and the plane that insulating base (1) contacts will be lower than insulating base (1) and outwards be not less than 10mm in the gap bottom surface.

9. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, it is characterized in that: conducting block (8) top is cylindrical structural, there is the groove of the upward opening that is provided with by size of current the top, groove shapes is an in-line, and there is the circular lead angle that is not less than 20 degree in exit, groove both sides, and bottom portion of groove is circular, radius is not less than 5mm, and conducting block (8) bottom is the screw structure.

10. electric equipment groove pressing block type electric equipment termination according to claim 1, when being used in the special-purpose wiring chamber of electrical apparatus for explosive atmospheres, it is characterized in that: following insulating base (21) matches with last insulating base (7), be the circle nested structure, the bottom outer wall is the guard ring formula, the guard ring internal diameter is greater than line nose (19) external diameter 5mm, the guard ring height exceeds conducting block (8) bottom screw tip and is not less than 5mm, the gap that guard ring one side has by wire core linear diameter size, the guard ring wall thickness is not less than 5mm, and during on-the-spot the installation, the gap direction of adjacent two termination insulating bases (21) is opposite.