CN201036157Y - Feed-through current transformer with convenience to obtain voltage - Google Patents

Abstract

A through current transformator convenient for voltage drawing relates to a mutual inductor. Aimed at the disadvantages that the prior through current transformator has a complicated structure and a high cost, and is not prone to anti-electricity-theft, the utility model provides a through current transformator convenient for voltage drawing. An outlet terminal of the voltage wire (2) and a voltage-drawing component (3), which have a mutual electrical connecting relation, are arranged on the mutual inductor body (1). The voltage-drawing component (3) is arranged on one side of the through hole (1-1) and can make a radial movement along the through hole (1-1). The utility model utilizes the existing structure of metallic embedded parts of the prior current transformator, connects the outlet terminal of the voltage wire with the current transformator directly and achieves the goal of voltage drawing. The voltage-drawing mode is simple and fast and is not prone to electricity theft; simultaneously, the double-screw bolt is connected with the lead stably and the voltage drawing is precise and reliable, therefore the utility model is beneficial for popularization and application.

Description

A kind of straight-through current transformer of conveniently taking voltage

Technical field

The utility model relates to a kind of instrument transformer.

Background technology

Now in the many straight-through current transformers that use, the output of no-voltage signal, voltage signal will obtain from the instrument transformer corresponding bus lines, it exist connection line complexity, measuring cost high efficiency low, be not easy anti-electricity-theft drawback.

Baoding triumphant space Electrical Appliances Co., Ltd has produced a kind of LDF1-0.66 guide rod through type current transformer, this is a kind of current transformer that can output voltage signal, it is a sheet metal of fixing a band centre bore on the hollow surface of punching instrument transformer, leading-out terminal place at instrument transformer is provided with the pressure-wire terminal, in instrument transformer inside sheet metal is connected with the pressure-wire outlet terminal.Centre bore with sheet metal during use is enclosed within on the guide rod of transformer, by screw bolt on guide rod instrument transformer is fixed, and the bolt that screws simultaneously can make sheet metal be connected closely with guide rod.Though the instrument transformer of this kind structure can be with the pressure-wire outlet terminal of the voltage transmission on the transformer guide rod to the instrument transformer, but, electricity filching person can be easily influences power taking and presses influence metering thus by unscrewing bolt or fill in mode such as insulant between sheet metal and guide rod; Perhaps electricity filching person unscrews after the bolt in the instrument transformer bottom and to connect load by lead and realize that electricity consumption do not measure, and therefore the instrument transformer of this structure is unfavorable for anti-electricity-theft very much.

ZL03265974.1 discloses a kind of anti-electricity-theft bus type current transformer, it is by loam cake, following box, secondary coil, two current signal lines on the secondary coil are formed, on covered set bolt, its main points are down to have in the box a little copper bar, connect a voltage signal line on the little copper bar, there is the screwed hole that is complementary with set bolt little copper bar upper end, after loam cake tightens up with following box, set bolt passes little copper bar screwed hole and withstands on the busbar, when fixing instrument transformer, voltage signal transferred to little copper bar, and voltage signal is caused electric energy meter by the voltage signal line that connects on the little copper bar.The problem that the instrument transformer of this kind structure exists is, owing to be to utilize set bolt and little copper bar acting in conjunction could transmit voltage signal on the busbar, so complex structure, it is higher to be not easy making and cost; Little copper bar is arranged in the instrument transformer box body, occupied valuable instrument transformer central space, so instrument transformer must have bigger volume; This patent is by set bolt and little copper bar transfer overvoltage signal, though voltage signal is gone out by the instrument transformer internal transmission, but outside set bolt is still and is exposed to, electricity filching person still can influence measurement to voltage by loosening this set bolt, does not therefore have substantial anti-electricity-theft meaning.

The utility model content

At existing straight-through current transformer have complex structure, the cost-effective rate is low and be not easy anti-electricity-theft drawback, the utility model provides a kind of current transformer, it is to press holding wire to be fixed on the inside of current transformer power taking, by existing current transformer is carried out the innovative design of structure, can realize conveniently taking voltage preferably and can effectively prevent the purpose of stealing.

It is realized by following scheme:

A kind of straight-through current transformer of conveniently taking voltage, it comprises the instrument transformer body 1 with center hole 1-1, the pressure-wire outlet terminal 2 and the power taking pressure part 3 that have electrical connection mutually are set on the described instrument transformer body 1, described power taking pressure part 3 is arranged on the side of center hole 1-1, and power taking pressure part 3 can radially move along center hole 1-1.Like this, the power taking pressure part can not occupy the valuable center hole position of walking bus, and therefore, the instrument transformer of this structure can be applied to the power taking of metal row or transformer guide rod is pressed the needs of signal.

Preferably, described power taking pressure part 3 is and the metallic stud 3a of instrument transformer body 1 by thread connection, has advantage of simple structure.

Preferably, described instrument transformer body 1 is provided with metal insert 4, the metallic stud 3a that has been threaded on the described metal insert 4, and described metal insert 4 is electrically connected with pressure-wire outlet terminal 2, has the advantage of handled easily.

More preferably, described metal insert 4 is at least two and be arranged on the surface of instrument transformer body 1 around center hole 1-1, is electrically connected between all metal inserts 4, and metallic stud 3a all has been threaded on each metal insert 4.Connect a double-screw bolt on a plurality of metal inserts respectively, a plurality of double-screw bolts can make the voltage signal of collection more stable, and can better instrument transformer be fixed on conducting rod, lead or the metal row.

Carrying out relative position by lead sealing between described metallic stud 3a and the instrument transformer body 1 fixes.

Preferably, also comprise nut 5, the side of described nut 5 is provided with the hole, and the hole is provided with the internal thread that matches with double-screw bolt 3a front end.Nut 5 is spun on the screwed hole that again double-screw bolt is screwed in nut 5 sides on conducting rod, lead or the metal row, can avoids loose bolt and influence collection voltage signal.

Especially, also comprise anti-electricity-theft face shield 6 No. one, a described anti-electricity-theft face shield 6 is connected by non-disconnectable mode with the surface of instrument transformer body 1.Preferred non-disconnectable mode syndeton is: No. one anti-electricity-theft face shield 6 is provided with card and/or shackle member 6-1, and instrument transformer body 1 is provided with and card and/or suitable shackle member and/or the card 1-2 of shackle member.

Perhaps, comprise that also 6, numbers anti-electricity-theft face shields 6 of an anti-electricity-theft face shield comprise at least two cover bodies, have between two cover bodies of annexation and connect by non-disconnectable mode; Preferably, the concrete structure between two cover bodies is:

An anti-electricity-theft face shield 6 comprises that a cover body 61 and 62, numbers cover bodies 61 of No. two cover bodies are provided with shackle member 61-1, and No. two cover body 62 is provided with the suitable card 62-1 with shackle member 61-1; Shackle member 61-1 on the described cover body 61 inserts in No. two card 62-1 on the cover body and realizes that clamping connects;

Be connected by removable mode between anti-electricity-theft face shield 6 and the instrument transformer body 1; The concrete structure that preferred removable mode connects is:

All be fixed with chute and/or slide block 16 on a described cover body 61 and No. two cover bodies 62, on the described instrument transformer body 1 with the corresponding section of a cover body 61 and No. two cover bodies 62, be fixed with slide block and/or the chute 17 suitable with chute and/or slide block 16 respectively, the shape of cross section of described chute 17 is up-small and down-big.

Anti-electricity-theft face shield 6 of above-mentioned No. of choosing any one kind of them and instrument transformer syndeton owing to can't open without destruction, therefore have better power-steeling preventing effect.

Especially, No. one anti-electricity-theft face shield 6 is two, is fixedly installed on respectively on the surface of instrument transformer body 1 both sides.

Preferably, an end that is provided with 7, No. two anti-electricity-theft face shields 7 of No. two anti-electricity-theft face shields at the leading-out terminal place of instrument transformer body 1 is fixedlyed connected with instrument transformer body 1, and the other end is provided with a cabling mouth 7-1.

More preferably, No. two anti-electricity-theft face shields 7 comprise between cover body 71 and 72, numbers cover bodies 71 of No. two cover bodies and No. two cover bodies 72 and connecting by non-disconnectable mode.The preferred version that non-disconnectable mode connects is: No. one cover body 71 is provided with shackle member 71-1, and No. two cover body 72 is provided with the suitable card 72-1 with shackle member 71-1; Shackle member 71-1 on the described cover body 71 inserts in No. two card 72-1 on the cover body and realizes that clamping connects;

The preferred version that No. two anti-electricity-theft face shields 7 are connected with instrument transformer body 1 is: the outer surface of the secondary connection end of instrument transformer body 1 is provided with protruding 1-3, be respectively arranged with the groove 18 suitable with protruding 1-3 on the inwall of a described cover body 71 and No. two cover bodies 72, groove 18 is installed on the protruding 1-3.

Further preferred, cabling mouth 7-1 place at No. two anti-electricity-theft face shields 7 connects bellows 9 by box joint 8, the outside dimension of the internal diameter size of cabling mouth 7-1 and the connecting portion 8-1 of box joint 8 is suitable, and the connecting portion 8-1 of box joint 8 is installed in the cabling mouth 7-1 and the nut by box joint 8 is fastenedly connected.

Perhaps, also comprise the cable 19 that an end is electrically connected with the internal interface line end of instrument transformer body 1; The housing of the insulated hull of described cable 19 appearances and the instrument transformer body 1 of secondary connection end is cast into one.

Further, it also comprises the bellows 20 that is sleeved on cable 19 outsides, and described bellows 20 also is cast into one with the housing of the instrument transformer body 1 of secondary connection end.

Straight-through current transformer described in the utility model has carried out innovative design to structure, utilize double-screw bolt on the instrument transformer to conduct electricity and have the simple manageable advantage of circuit, and efficient is expensive low; The nut that is threaded on the conducting rod can avoid being connected loosening between double-screw bolt and the conducting rod or electricity filching person is filled in insulant to the junction and influenced metering by double-screw bolt and the cooperation between the nut, has therefore avoided stealing well; Simultaneously, nut can also play instrument transformer is fixed to effect on the transformer, the instrument transformer body is fixed on the porcelain vase position of transformer conducting bar lower end, avoided electricity filching person in the instrument transformer lower end the direct lead-in wire situation of carrying out stealing; A plurality of metal inserts can be fixed on instrument transformer on the conducting rod more firmly, thus can make simultaneously be electrically connected between double-screw bolt and the conducting rod transfer overvoltage signal more better.

Anti-electricity-theft face shield each other or with the instrument transformer body between be connected by non-disconnectable mode, it can realize the optimization of anti-stealing electricity function, in case because cover body and instrument transformer fixing after, can not open by failure mode, seal the drawback that is forged easily with respect to present lead sealing mode, the method of attachment of non-disconnectable mode described in the utility model can avoid electricity filching person to open cover body fully with hoodwinking people, has therefore avoided the generation of stealing situation better.

Anti-electricity-theft face shield is set No. two at the leading-out terminal place, and No. two anti-electricity-theft face shields can be avoided electricity filching person to juggle things at instrument transformer outlet terminal place and carry out stealing.

In summary it can be seen that current transformer power taking pressure mode described in the utility model is simple and direct and be not easy stealing, handling safety, it can be placed on the outer transformer conducting bar of batch meter, lead or the metal row, reduces the volume of batch meter greatly; Easy to use in the working time that can greatly save the workman, cost simple in structure is low flexibly, and simultaneously, double-screw bolt is connected stable with lead, and power taking is pressed accurately reliable, therefore is beneficial to and applies.

Description of drawings

Fig. 1 is the structure cutaway view of instrument transformer described in the utility model;

Fig. 2 is the front view of instrument transformer;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is embodiment 1 a described instrument transformer user mode schematic diagram;

Fig. 5 is that embodiment 1 described metallic stud 3a carries out the fixing structural representation of relative position by lead sealing 11 and instrument transformer body 1;

Fig. 6 A is embodiment 2 described instrument transformer structure cutaway views;

Fig. 6 B is embodiment 2 described instrument transformer structural representations;

Fig. 7 is the structural representation of embodiment 2 described nuts 5;

Fig. 8 is the structural representation that embodiment 2 described metallic stud 3a and nut 5 are connected;

Fig. 9 A is the embodiment 3 described instrument transformer structural representations that are provided with an anti-electricity-theft face shield 6;

Fig. 9 B is embodiment 3 described anti-electricity-theft face shields 6 and instrument transformer body 1 syndeton blast diagrammatic sketch;

Figure 10 is the syndeton schematic diagram between embodiment 3 described anti-electricity-theft face shields 6 and the instrument transformer body 1;

Figure 11 is embodiment 4 described instrument transformer bodies 1 and anti-electricity-theft face shield 6 syndeton schematic diagrames;

Figure 12 is the explosive view of embodiment 4 described instrument transformer bodies 1 and anti-electricity-theft face shield 6 syndetons;

Figure 13 is the syndeton schematic diagram of embodiment 5 described instrument transformer bodies 1 and No. two anti-electricity-theft covers 7;

Figure 14 is the explosive view of embodiment 5 described instrument transformer bodies 1 and No. two anti-electricity-theft face shield 7 syndetons;

Figure 15 is the structure cut-away view that the housing of embodiment 6 described cables and instrument transformer body 1 is cast into one;

Figure 16 is the structural representation that the housing of embodiment 6 described cables and instrument transformer body 1 is cast into one;

Figure 17 is the structure cut-away view that the embodiment 6 described bellowss 20 and the housing of instrument transformer body 1 are cast into one;

Figure 18 is that the housing of embodiment 6 described bellowss 20 and instrument transformer body 1 is cast into the unitary whole structural representation.

Wherein, instrument transformer body 1, center hole 1-1, card 1-2, protruding 1-3, pressure-wire outlet terminal 2, metal insert 4, power taking pressure part 3, metallic stud 3a, nut 5, hole 5-1, an anti-electricity-theft face shield 6, shackle member 6-1 on anti-electricity-theft face shield 6, No. two cover bodies 62 of 61, numbers anti-electricity-theft face shields 6 of a cover body of an anti-electricity-theft face shield 6, No. two anti-electricity-theft face shields 7, cabling mouth 7-1, a cover body 71 of No. two anti-electricity-theft face shields 7, shackle member 71-1 on cover body 71, the card 72-1 on 72, No. two cover bodies 72 of No. two cover bodies of No. two anti-electricity-theft face shields 7, box joint 8, connecting portion 8-1, bellows 9, metal row 10, lead sealing 11, conductor 12, mutual inductor coil 13, insulating barrier 14, transformer guide rod 15, slide block 16, chute 17, groove 18, cable 19, be sleeved on the bellows 20 of cable 19 outsides, fixed block 21, pin 22, screw 23.

Embodiment

Specify the utility model preferred embodiment below in conjunction with accompanying drawing.

Embodiment 1:

The described current transformer of present embodiment is mainly used in gets voltage condition to bare metal row.It comprises the instrument transformer body 1 with center hole 1-1, the pressure-wire outlet terminal 2 and the power taking pressure part 3 that have electrical connection mutually are set on the described instrument transformer body 1, described power taking pressure part 3 is arranged on the side of center hole 1-1, and power taking pressure part 3 can radially move along center hole 1-1.

The side that power taking pressure part 3 is arranged on center hole can be avoided the power taking pressure part to occupy the center hole position and influence the use of instrument transformer, simultaneously, the power taking pressure part radially moves the needs that the instrument transformer that can make this structure adapts to different inner diameters, different cross section shape bus along center hole, therefore increases the adaptability that instrument transformer uses.

Power taking pressure part 3 is arranged on a side of center hole, promptly is arranged on the instrument transformer body of center hole termination.The structure of power taking pressure part 3 with and all be a lot of along the mode that center hole radially moves, such as, power taking pressure part 3 can be sheet or reguline metal, follower head at it is provided with slide block, on instrument transformer body 1, chute is set, can realizes being connected and moving radially between power taking pressure part and the instrument transformer body by the slide block and the cooperation of chute.Block power taking pressure part 3 can also be connected by between spring and the instrument transformer body, can realize moving radially between itself and the instrument transformer body centre bore equally.

Preferably, described power taking pressure part 3 is metallic stud 3a, and described metallic stud 3a connects with instrument transformer body 1 by screw thread.What can now separate is, the screwed hole that passes through for metallic stud 3 need be set on instrument transformer body 1, and the axis of this screwed hole should pass through center hole 1-1.

In the prior art, straight-through current transformer is provided with metal insert 4, the metallic stud 3a's that is threaded on the metal insert 4, but their effect is fixedly punching bus.Present embodiment is preferably, effectively utilize the structure of existing instrument transformer, referring to figs. 1 through Fig. 4, metallic stud 3a is connected with metal insert 4, again the pressure-wire outlet terminal 2 on the instrument transformer body 1 is electrically connected with metal insert 4, like this, metallic stud 3a will arrange metal the pressure-wire outlet terminal that voltage is delivered to instrument transformer to metal row 10 (being the punching bus) fixedly the time, thereby realizes metal is arranged the collection of voltage signal on 10.

More preferably, described metal insert 4 is two and centers on the surface that center hole 1-1 is arranged on instrument transformer body 1, be electrically connected by conductor 12 between all metal inserts 4, metallic stud 3a all has been threaded on each metal insert 4, this structure can realize a plurality of double-screw bolts and contacting that metal is arranged, thereby gathers voltage signal better.Certainly can expect,, double-screw bolt 3a can be arranged to large-area front end,, metallic stud can be arranged to semicircular front end to adapt to cylindrical metal row's outer surface such as for cylindrical metal row in order to gather voltage signal better.

Can carry out relative position by lead sealing 11 between described metallic stud 3a and the instrument transformer body 1 fixes; with reference to Fig. 5; to avoid electricity filching person to break away from or the loosening collection that influences voltage signal to itself and metal row 10 by rotating double-screw bolt 3a; certainly in actual applications; can also take other purposes that realizes forbidding the double-screw bolt rotation as modes such as welding, rivets, also all at protection range of the present utility model.

In the present embodiment, connecting line between metal insert 4 and the pressure-wire outlet terminal 2 is injected in the instrument transformer housing, during application, metal insert 4 can be fixed on the instrument transformer body 1 and then by lead and be connected with pressure-wire outlet terminal 2, also can be as shown in Figure 1, metal insert 4 and conductor 12 are made integrative-structure, and the other end of conductor 12 directly connects pressure-wire outlet terminal 2; Described conductor 12 can be processed into annular, semicircle, also can be processed into the sheet of rectangle, spill as required, the conductor 12 of laminated structure is arranged on the top of mutual inductor coil 13 and separates the instrument transformer housing of casting outside again by insulating barrier 14 and mutual inductor coil 13.Described structure has conspicuous advantage: metallic stud 3a, metal insert 4 all are arranged on the instrument transformer housing, they do not occupy the position that the instrument transformer centre bore is walked bus, thereby do not influence the coiling diameter of coil, can not influence simultaneously the use occasion of instrument transformer, simultaneously, the instrument transformer of this structure has also that the voltage signal transmission range is short, simple in structure, tie point is not easy to occur plurality of advantages such as disconnecting less.

Embodiment 2:

The described current transformer of present embodiment is mainly used in gets voltage condition to the transformer guide rod.If no special instructions, the described structure of present embodiment is identical with embodiment 1.

Described current transformer of present embodiment and embodiment 1 described instrument transformer difference structurally are, with reference to Fig. 6 A, Fig. 6 B, Fig. 7, Fig. 8, it also comprises nut 5, and the side of described nut 5 is provided with hole 5-1, and the hole is provided with the internal thread that matches with metallic stud 3a front end.

During use, at first the centre bore with instrument transformer penetrates on the transformer guide rod 15, then nut 5 is spun on the guide rod 15 of transformer, the metallic stud 3 that will be threaded with metal insert 4 again

The front end of a screws in the screwed hole 5-1 of nut 5 sides.Like this, both can guarantee that instrument transformer body 1 was fixed on the guide rod 15, and avoid stealing, the while can be avoided double-screw bolt to become flexible and fill in insulating bodies between double-screw bolt 3a and guide rod 15, thereby can not influence the collection to voltage signal.

Preferably, around center hole 1-1, at least two metal inserts 4 are set on the instrument transformer housing, can be two metal inserts shown in Fig. 6 A, Fig. 6 B, it also can be three, four or more a plurality of, be electrically connected between all metal inserts 4, a double-screw bolt 3a all has been threaded on each metal insert 4.Be understandable that, the many more collections that are beneficial to more voltage signal of the number of metal insert 4, therefore, a plurality of double-screw bolt 3a are connected with nut 5 can make the voltage signal of collection more stable, and can better instrument transformer body 1 be fixed on the transformer guide rod 15.

In the foregoing description, embodiment 1 is preferably applied to that exposed metal row is carried out power taking and presses, embodiment 2 is preferably applied to that the transformer guide rod is carried out power taking and presses, but need to prove, embodiment 1 described structure can be applied to that equally the transformer guide rod is carried out power taking and press, embodiment 2 described structures can be applied to that metal row is carried out power taking and press, and can both realize purpose described in the utility model.

Anti-electricity-theft cover above the instrument transformer nearly all is a case now, several instrument transformers together are placed on lead sealing then in the chest together with electric energy meter, the problem that its exists at first is, the lead sealing on the casing is as easy as rolling off a log destroyed and easily by imitated, therefore power-steeling preventing effect and bad in fact; Also have, just must open chest when the user need overhaul circuit, this just needs a lot of departments to show up, and this is unfavorable for operating in actual applications; In addition, because instrument transformer is limit by casing, for anti-electricity-theft its can only be installed in the fixed position, the user who is not suitable for the diverse location condition uses, and casing must just can hold a plurality of instrument transformers, electric energy meter and numerous lines very greatly, therefore be unfavorable for installation, wiring and management, and cost is very high.Therefore, on embodiment 1 and embodiment 2 described power taking laminated structures, the utility model also comprises anti-electricity-theft face shield, by anti-electricity-theft face shield should be used for realizing integral protection to stealing, concrete structure is with reference to following embodiment.

Embodiment 3:

Present embodiment and embodiment 1 and embodiment 2 differences are, the structure of instrument transformer also comprises anti-electricity-theft face shield 6 No. one, be with the existing structure difference, the described anti-electricity-theft face shield 6 of present embodiment is connected by non-disconnectable mode with the surface of instrument transformer body 1, as can be seen, the anti-electricity-theft face shield of present embodiment is fixed on the instrument transformer body, and like this, instrument transformer just can be taken any position and use and be not limited in the chest.Be connected by non-disconnectable mode between this face shield and the instrument transformer body, that is to say, after metrological service is fixed to anti-electricity-theft face shield on the instrument transformer, just face shield can't be taken off above instrument transformer without destroying, electricity filching person just can't be hoodwinked people and be carried out stealing like this, thereby can increase the degree of protection to stealing widely.

Fig. 2 and Fig. 4 have clearly illustrated the structure of instrument transformer body 1 outer surface, on the basis of this structure, connect anti-electricity-theft face shield 6 No. one by non-disconnectable mode again, the instrument transformer structure that is provided with an anti-electricity-theft face shield 6 is shown in Fig. 9 A, and it is as a whole to be arranged on the anti-electricity-theft face shield of No. of instrument transformer body 1 one side surfaces 6.This non-disconnectable syndeton is preferably, and with reference to Fig. 9 B and Figure 10, No. one anti-electricity-theft face shield 6 is provided with card and/or shackle member 6-1, and described instrument transformer body 1 is provided with and card and/or suitable shackle member and/or the card 1-2 of shackle member 6-1.Like this, can realize that by the card and the clamping of shackle member anti-electricity-theft face shield is connected with the non-disconnectable of instrument transformer.

Described anti-electricity-theft face shield 6 and on shackle member can make of engineering plastics or transparent engineering plastics, at the instrument transformer surface of shell a plurality of card are set, because the instrument transformer housing generally all is to be made by the good plastics of toughness, therefore just can't take off without destroying after snapping onto anti-electricity-theft face shield 6 on the instrument transformer housing, and then prevented stealing, can destroy anti-electricity-theft face shield when simultaneously, metrological service need overhaul and be unlikely to destroy instrument transformer.

For as described in present embodiment, being provided with anti-electricity-theft face shield at the instrument transformer body surface, then can between double-screw bolt and instrument transformer body, lead sealing be set yet, but the fixed block 21 of tape punching can be set in the rear end of double-screw bolt, with reference to Fig. 6 B, avoid becoming flexible of double-screw bolt 3a by in the perforation of fixed block 21, inserting pin 22, can not be worn pin for limitting, can directly double-screw bolt 3a be hammered on the instrument transformer body with screw 23 by the instrument transformer body construction.

Embodiment 4:

The present embodiment difference from Example 3 is, the another kind of structure that instrument transformer body 1 and anti-electricity-theft face shield 6 are connected by non-disconnectable mode is provided.

An anti-electricity-theft face shield 6 that is positioned at instrument transformer body 1 one sides comprises two cover bodies, has between two cover bodies of annexation to connect by non-disconnectable mode, and the structure optimization that non-disconnectable mode connects is, with reference to Figure 12:

An anti-electricity-theft face shield 6 comprises that a cover body 61 and 62, numbers cover bodies 61 of No. two cover bodies are provided with shackle member 61-1, and No. two cover body 62 is provided with the suitable card 62-1 with shackle member 61-1; Shackle member 61-1 on the described cover body 61 inserts in No. two card 62-1 on the cover body and realizes that clamping connects;

Be appreciated that described shackle member 61-1 of present embodiment and card 62-1 are not limited to two of the sides shown in Figure 12, also can be set to any amount according to actual needs.Be understandable that the quantity of shackle member 61-1 and card 62-1 is many more, connect firm more.

Be connected by removable mode between anti-electricity-theft face shield 6 and the instrument transformer body 1; The structure optimization that removable mode connects is:

All be fixed with chute and/or slide block 16 on a cover body 61 and No. two cover bodies 62, on the described instrument transformer body 1 with the corresponding section of a cover body 61 and No. two cover bodies 62, be respectively equipped with slide block and/or the chute 17 suitable with chute and/or slide block 16, the shape of cross section of described chute 17 is up-small and down-big, such as swallow-tail form, inverse-T-shaped or " L " shape, certainly, this cross sectional shape is not limited to described three kinds, use needs as long as satisfy, the protection range that all belongs to this patent, described up-small and down-big structure can guarantee that a cover body 61 fixedlys connected with instrument transformer body 1 respectively with No. two cover bodies 62; In practical operation, can respectively a cover body 61 and No. two cover bodies 62 be slipped into from slide block and/or chute 17 on the instrument transformer body 1 by chute and/or slide block 16, after cover body 61 and No. two cover bodies 62 fasten, flanging all is stuck on the housing of instrument transformer body 1, further play the effect that relative motion takes place between restriction cover body and the instrument transformer body 1, and be connected to one by shackle member and card, and form non-disconnectable the connection between the instrument transformer body 1.

Embodiment 3 and embodiment 4 described anti-electricity-theft face shields 6 are two, are fixedly installed on respectively on the surface of instrument transformer body 1 both sides, certainly at a side table of instrument transformer anti-electricity-theft face shield 6 are set No. one as required and only.

Embodiment 5:

Anti-electricity-theft also the needs protects the instrument transformer outlet terminal, therefore, is that with embodiment 1-4 difference present embodiment provides a kind of structure that prevents from the instrument transformer leading-out terminal is carried out stealing.

An end that is provided with 7, No. two anti-electricity-theft face shields 7 of No. two anti-electricity-theft face shields at the leading-out terminal place of instrument transformer body 1 is fixedlyed connected with instrument transformer body 1, and the other end is provided with a cabling mouth 7-1.

Preferred structure is, with reference to Figure 13,14, described No. two anti-electricity-theft face shields 7 comprise between cover body 71 and 72, numbers cover bodies 71 of No. two cover bodies and No. two cover bodies 72 and connecting by non-disconnectable mode.Non-disconnectable mode syndeton is preferably: No. one cover body 71 is provided with shackle member 71-1, and No. two cover body 72 is provided with the suitable card 72-1 with shackle member 71-1; Shackle member 71-1 on the described cover body 71 inserts in No. two card 72-1 on the cover body and realizes that clamping connects;

No. two anti-electricity-theft face shield 7 is preferably with instrument transformer body 1 fixed connection structure: the outer surface of the secondary connection end of instrument transformer body 1 is provided with protruding 1-3, be respectively arranged with the groove 18 suitable with protruding 1-3 on the inwall of a described cover body 71 and No. two cover bodies 72, groove 18 is installed on the protruding 1-3.Preferably, described protruding 1-3 is an annular projection.

More preferably, cabling mouth 7-1 place at No. two anti-electricity-theft face shields 7 is connected with bellows 9 by box joint 8, the outside dimension of the internal diameter size of cabling mouth 7-1 and the connecting portion 8-1 of box joint 8 is suitable, and the connecting portion 8-1 of box joint 8 is installed in the cabling mouth 7-1 and the nut by box joint 8 is fastenedly connected.

Embodiment 6:

Present embodiment is different with embodiment 5, and it provides the another kind of structure that prevents from the instrument transformer leading-out terminal is carried out stealing.

With reference to Figure 15, Figure 16, it comprises the cable 19 that an end is electrically connected with the internal interface line end of instrument transformer body 1; The housing of the insulated hull of described cable 19 appearances and the instrument transformer body 1 of secondary connection end is cast into one.

Preferably, with reference to Figure 17, Figure 18, it also comprises the bellows 20 that is sleeved on cable 19 outsides, and described bellows 20 also is cast into one with the housing of the instrument transformer body 1 of secondary connection end.

The insulation sheath of the described cable 19 of present embodiment and the housing of instrument transformer body 1 are cast into one, electric current contact and voltage contact all are arranged in the housing of instrument transformer body 1, replaced lead sealing, be specially adapted to determine in the engineering of cable length, can protection against the tide, waterproof, anti-electricity-theft; Have rational in infrastructure, reliable, convenient and quick construction, advantage with low cost.

Because cable is walked at the cabling mouth 7-1 place of No. two anti-electricity-theft face shields 7, in conjunction with the embodiments 5 and embodiment 6 can expect that No. two anti-electricity-theft face shields 7 and cable can be cast into one and use, and still can realize the purpose of this utility model preferably; Certainly it will also be appreciated that the bellows that is sleeved on the cable outside can be cast into one with No. two anti-electricity-theft face shields 7 equally, therefore all should be at protection range of the present utility model.

Need to prove that the described straight-through current transformer model of this patent does not need to limit, the structure of himself does not need to limit yet, so long as the punching instrument transformer can pass through the described purpose of this patent, and promptly should be at protection range of the present utility model.In addition; above the exemplary illustration also just this patent done of the described structure of each embodiment and do not limit its protection range; those skilled in the art can do some to this patent structure according to the described scheme of present embodiment fully and change to realize identical purpose; for the change of being done according to the described scheme of this patent so long as just available without creative work; all be considered as the replacement that is equal to this patent, all should be within the protection range of this patent.

Claims (17)

1. the straight-through current transformer of a conveniently taking voltage, it comprises the have center hole instrument transformer body (1) of (1-1), the pressure-wire outlet terminal (2) and the power taking pressure part (3) that have electrical connection mutually are set on the described instrument transformer body (1), it is characterized in that described power taking pressure part (3) is arranged on a side of center hole (1-1), and power taking pressure part (3) can radially move along center hole (1-1).

2. the straight-through current transformer of a kind of conveniently taking voltage according to claim 1 is characterized in that described power taking pressure part (3) is and the metallic stud (3a) of instrument transformer body (1) by thread connection.

3. the straight-through current transformer of a kind of conveniently taking voltage according to claim 1, it is characterized in that described instrument transformer body (1) is provided with metal insert (4), the metallic stud (3a) that has been threaded on the described metal insert (4), described metal insert (4) is electrically connected with pressure-wire outlet terminal (2).

4. the straight-through current transformer of a kind of conveniently taking voltage according to claim 3, it is characterized in that described metal insert (4) is at least two and be arranged on the surface of instrument transformer body (1) around center hole (1-1), be electrically connected between all metal inserts (4), metallic stud (3a) all has been threaded on each metal insert (4).

5. the straight-through current transformer of a kind of conveniently taking voltage according to claim 2 is characterized in that carrying out relative position by lead sealing between described metallic stud (3a) and the instrument transformer body (1) fixes.

6. the straight-through current transformer of a kind of conveniently taking voltage according to claim 2 is characterized in that it also comprises nut (5), and the side of described nut (5) is provided with hole (5-1), and hole (5-1) is provided with the internal thread that matches with double-screw bolt (3a) front end.

7. according to the straight-through current transformer of claim 1,2,3,4,5 or 6 described a kind of conveniently taking voltages, it is characterized in that also comprising an anti-electricity-theft face shield (6), a described anti-electricity-theft face shield (6) is connected by non-disconnectable mode with the surface of instrument transformer body (1).

8. the straight-through current transformer of a kind of conveniently taking voltage according to claim 7, it is characterized in that a described anti-electricity-theft face shield (6) is provided with card and/or shackle member (6-1), described instrument transformer body (1) is provided with and card and/or suitable shackle member and/or the card (1-2) of shackle member.

9. according to the straight-through current transformer of claim 1,2,3,4,5 or 6 described a kind of conveniently taking voltages, it is characterized in that also comprising an anti-electricity-theft face shield (6), be connected by removable mode between an anti-electricity-theft face shield (6) and the instrument transformer body (1);

A described anti-electricity-theft face shield (6) comprises at least two cover bodies, has between two cover bodies of annexation to connect by non-disconnectable mode.

10. the straight-through current transformer of a kind of conveniently taking voltage according to claim 9 is characterized in that:

The concrete structure that connects by non-disconnectable mode between two cover bodies is:

A described anti-electricity-theft face shield (6) comprises a cover body (61) and No. two cover bodies (62), and a cover body (61) is provided with shackle member (61-1), and No. two cover bodies (62) are provided with and the suitable card (62-1) of shackle member (61-1); Shackle member (61-1) on the described cover body (61) is inserted in No. two card (62-1) on the cover body and is realized that clamping connects;

The concrete structure that is connected by removable mode between an anti-electricity-theft face shield (6) and the instrument transformer body (1) is:

All be fixed with chute and/or slide block (16) on a described cover body (61) and No. two cover bodies (62), described instrument transformer body (1) is gone up the corresponding section with a cover body (61) and No. two cover bodies (62), be fixed with respectively and chute and/or suitable slide block and/or the chute (17) of slide block (16), the shape of cross section of described chute (17) is up-small and down-big.

11. the straight-through current transformer of a kind of conveniently taking voltage according to claim 10 is characterized in that a described anti-electricity-theft face shield (6) is two, is fixedly installed on respectively on the surface of instrument transformer body (1) both sides.

12. straight-through current transformer according to claim 1,2,3,4,5 or 6 described a kind of conveniently taking voltages, the leading-out terminal place that it is characterized in that described instrument transformer body (1) is provided with No. two anti-electricity-theft face shields (7), one end of No. two anti-electricity-theft face shields (7) is fixedlyed connected with instrument transformer body (1), and the other end is provided with a cabling mouth (7-1).

13. the straight-through current transformer of a kind of conveniently taking voltage according to claim 12, it is characterized in that described No. two anti-electricity-theft face shields (7) comprise a cover body (71) and No. two cover bodies (72), connect by non-disconnectable mode between a cover body (71) and No. two cover bodies (72).

14. the straight-through current transformer of a kind of conveniently taking voltage according to claim 13 is characterized in that a cover body (71) is provided with shackle member (71-1), No. two cover bodies (72) are provided with and the suitable card (72-1) of shackle member (71-1); Shackle member (71-1) on the described cover body (71) is inserted in No. two card (72-1) on the cover body and is realized that clamping connects;

The outer surface of the secondary connection end of described instrument transformer body (1) is provided with projection (1-3), be respectively arranged with on the inwall of a described cover body (71) and No. two cover bodies (72) and projection (1-3) suitable groove (18), groove (18) is installed on the projection (1-3).

15. the straight-through current transformer of a kind of conveniently taking voltage according to claim 12, the cabling mouth (7-1) that it is characterized in that described No. two anti-electricity-theft face shields (7) is located to be connected with bellows (9) by box joint (8), the outside dimension of the connecting portion (8-1) of the internal diameter size of cabling mouth (7-1) and box joint (8) is suitable, and the connecting portion (8-1) of box joint (8) is installed in the cabling mouth (7-1) and the nut by box joint (8) is fastenedly connected.

16., it is characterized in that it also comprises the cable (19) that an end is electrically connected with the internal interface line end of instrument transformer body (1) according to the straight-through current transformer of claim 1,2,3,4,5 or 6 described a kind of conveniently taking voltages; The housing of the insulated hull of described cable (19) appearance and the instrument transformer body (1) of secondary connection end is cast into one.

17. the straight-through current transformer of a kind of conveniently taking voltage according to claim 16, it is characterized in that it also comprises the bellows (20) that is sleeved on cable (19) outside, described bellows (20) also is cast into one with the housing of the instrument transformer body (1) of secondary connection end.

Images