CN101034099B - Straight-through current transformer with anti-theft electric surface shield - Google Patents

Straight-through current transformer with anti-theft electric surface shield Download PDF

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Publication number
CN101034099B
CN101034099B CN2007100514630A CN200710051463A CN101034099B CN 101034099 B CN101034099 B CN 101034099B CN 2007100514630 A CN2007100514630 A CN 2007100514630A CN 200710051463 A CN200710051463 A CN 200710051463A CN 101034099 B CN101034099 B CN 101034099B
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CN
China
Prior art keywords
electricity
face shield
theft
mutual inductor
straight
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Expired - Fee Related
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CN2007100514630A
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CN101034099A (en
Inventor
万家盛
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Hubei Shengjia Wiring Co Ltd
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Hubei Shengjia Wiring Co Ltd
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Priority to CN2007100514630A priority Critical patent/CN101034099B/en
Publication of CN101034099A publication Critical patent/CN101034099A/en
Priority to PCT/CN2008/000279 priority patent/WO2008095415A1/en
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Publication of CN101034099B publication Critical patent/CN101034099B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase ac
    • H01F38/24Voltage transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

This invention relates to a straight-through current transformer with thief proof electricity veil. The invention includes transformer noumenon (1) and thief proof electricity veil (2). Middle of thief proof electricity veil (2) set up threading hole (2- 1); Thief proof electricity veil (2) dead join with end face of transformer noumenon (1) threading hole. This invention is able to effectively prevent electric larceny behavioral occurring by decreasing pressure of watt hour meter. from technically it deter pressure decreasing of watt-hour meter, thereby avoid problem of electric quantity understatement. The invention possesses merit of structure simplicity, cost low and fail safe.

Description

Straight-through current transformer with anti-electricity-theft face shield
Technical field
The present invention relates to the electric power mutual-inductor field, be specifically related to the anti-electricity-theft current transformer of a kind of punching.
Background technology
Current, in electric energy metrical, usually adopt current transformer and watt-hour meter to be used, an electric energy meter metering how much, depend mainly on voltage, electric current, power factor three elements and the product of time.Therefore, change any one key element in the three elements, can make electric energy meter slow-speed, stall even counter-rotating, thereby reach the purpose of stealing.In the prior art, the straight-through current transformer that built-in power taking is pressed does not prevent that the people from being the design of stealing, exists the problem that is unfavorable for the electric administrative department management.
At the straight-through current transformer that existing built-in power taking is pressed, there is multiple mode to reach the purpose of people for stealing, such as: can become flexible clamp nut, make that the gap increases between primary line and power taking pressure part; Can also screw off clamp nut, between primary line and power taking pressure part, inject transparent insulating layer, do very hiddenly, its principle is that the voltage that feeds watt-hour meter is reduced, reach few metering, people purpose, seriously encroach on national interests, also jeopardize power grid security simultaneously for stealing.For fear of the lawless person by above-mentioned means stealing, metrological service often is sealed in current transformer in the batch meter, but because the three-dimensional house lead in need connect current transformer respectively, just need to hold the chest of at least three current transformers when therefore sealing, this just makes batch meter have bigger volume and is unfavorable for depositing and field management.
Summary of the invention
Do not have the problem of anti-electricity-theft design for solving the straight-through current transformer that has built-in power taking pressure now, the invention provides a kind of straight-through current transformer with anti-electricity-theft face shield.
Technical scheme of the present invention is achieved in that it comprises mutual inductor body 1 and anti-electricity-theft face shield 2, and described anti-electricity-theft face shield 2 middle parts are provided with primary line through wires hole 2-1; Described anti-electricity-theft face shield 2 is fixedlyed connected with the surface of mutual inductor body 1.
Further, anti-electricity-theft face shield 2 described in the technique scheme comprises that a cover body 21 and 22, numbers cover bodies 21 of No. two cover bodies are provided with shackle member 21-1, and No. two cover body 22 is provided with the suitable card 22-1 with shackle member 21-1; Shackle member 21-1 on the described cover body 21 inserts in No. two card 22-1 on the cover body and realizes that clamping connects;
Further, cover body 21 described in the technique scheme is provided with protruding coupling part and/or recessed coupling part 21-2, and described No. two cover bodies 22 are provided with No. two protruding coupling parts and/or recessed coupling part 22-2; On the described transformer body 1 with the corresponding section of a cover body 21 and No. two cover bodies 22; Be respectively arranged with respectively recessed coupling part and/or the protruding coupling part 1-2 suitable with protruding coupling part and/or recessed coupling part 21-2 and No. two protruding coupling parts and/or recessed coupling part 22-2, No. two protruding coupling parts on protruding coupling part on the described cover body 21 and/or recessed coupling part 21-2 and described No. two cover bodies 22 and/or recessed coupling part 22-2 respectively with transformer body 1 on recessed coupling part and/or protruding coupling part 1-2 achieve a fixed connection by embedding connected mode.
In addition, the secondary connection end of described mutual inductor body 1 is set with the anti-electricity-theft cover body 3 of secondary connection end, and the other end of the anti-electricity-theft cover body 3 of described secondary connection end has a cable hole 3-1.The generation of carrying out electricity filching behavior at the secondary line terminals has further been evaded in this design.Particularly, cable hole 3-1 on the anti-electricity-theft cover body 3 of described secondary connection end is connected with corrugated tube 5 by the box joint, the outside dimension of the connecting portion of the internal diameter size of cable hole 3-1 and box joint 4 is suitable, and the connecting portion of box joint 4 is installed in the cable hole 3-1 on the anti-electricity-theft cover body 3 of secondary connection end and the nut by box joint 4 is fastenedly connected.
Straight-through current transformer with anti-electricity-theft face shield of the present invention during use, is installed on mutual inductor body 1 on the primary line earlier; Carry out the connection of power taking pressure part and the fixing operation of mutual inductor body 1 then; The surface that anti-electricity-theft face shield 2 is fixed on mutual inductor body 1 is fixed at last.When the electricity filching person people is stealing, need to destroy anti-electricity-theft face shield 2, can't reduce after the stealing.The present invention can prevent the generation by the electricity filching behavior of the voltage that reduces to feed watt-hour meter effectively; Thoroughly prevented the suffered voltage of watt-hour meter to reduce technically, thereby the problem of having avoided causing electric weight to be counted less occur.It has simple in structure, cost is low and the advantage of reliable operation, need not the anti-electricity-theft electric quantity metering box of large volume, is convenient to installation, wiring and management, have broad application prospects.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram that the present invention is equipped with lead; Fig. 2 is the structure explosive view of embodiment three; Fig. 3 is the A-A partial sectional view of Fig. 2; Fig. 4 is that the B of Fig. 1 is to view; Fig. 5 is the mutual inductor structural representation that metal row is installed; Fig. 6 is the mutual inductor structural representation that the transformer guide rod is installed; Fig. 7 is the structure explosive view of embodiment two; Fig. 8 is the one-piece construction synoptic diagram of embodiment four; Fig. 9 is the partial cutaway structural drawing of Fig. 8; Figure 10 is the partial cutaway structural drawing with corrugated tube 7 described in the embodiment four; Figure 11 is the partial cutaway structural drawing of embodiment five; Figure 12 is that the power taking described in the embodiment five presses metallic stud 7 to have the partial cutaway structural drawing of the front end of spine; Figure 13 is the stereographic map of the anti-electricity-theft cover body 3 of secondary connection end; Figure 14 is the B portion enlarged drawing of Figure 12.
Embodiment
Specify preferred embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment one: (referring to Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6) present embodiment is by mutual inductor body 1 and be fixed on mutual inductor body 1 lip-deep anti-electricity-theft face shield 2, and described anti-electricity-theft face shield 2 middle parts are provided with primary line through wires hole 2-1; Described anti-electricity-theft face shield 2 is connected by non-disconnectable mode with the surface of mutual inductor body 1; As shown in Figure 2, described anti-electricity-theft face shield 2 is provided with shackle member 2-2, described mutual inductor body 1 is provided with the suitable card 1-1 with shackle member 2-2, and the interior realization of the card 1-1 clamping that described anti-electricity-theft face shield 2 is provided with on the shackle member 2-2 insertion mutual inductor body 1 connects.
In addition, described shackle member 2-2 of present embodiment and card 1-1 are not limited to two of the sides shown in Fig. 2, also can be set to any amount according to actual needs.Be understandable that the quantity of shackle member 2-2 and card 1-1 is many more, connect firm more.Can certainly be such situation, that is, described mutual inductor body 1 be provided with shackle member, and described anti-electricity-theft face shield 2 is provided with the card suitable with shackle member.
The shape of described primary line through wires hole 2-1 can be decided according to the cross sectional shape of primary line; For example, for metal row, the shape of described primary line through wires hole 2-1 can be designed as the corresponding rectangle of cross sectional shape with metal row; For cylindric primary line, the shape of described primary line through wires hole 2-1 can be designed as circle.Certainly, in order to increase use interchangeability of the present invention, the shape of described primary line through wires hole 2-1 can also be designed to rectangle and the circular shape that coincides, as shown in Figure 4.Like this, for the punching mutual inductor of same model specification, promptly can be used for metal row, as shown in Figure 5; Also can be used for cylindric primary lines such as transformer guide rod, as shown in Figure 6.
In addition, described anti-electricity-theft face shield 2 can be two, is fixedly installed on respectively on the mutual inductor body 1 through wires hole end faces of both sides.This embodiment carries out anti-electricity-theft protection with mutual inductor body 1 both sides, is mainly used in operating positions such as batch meter is interior, metal row.
Embodiment two: the difference of (referring to Fig. 7) present embodiment and embodiment one is that described anti-electricity-theft face shield 2 comprises a cover body 21 and No. two cover bodies 22, No. one cover body 21 is provided with shackle member 21-1, and No. two cover body 22 is provided with the suitable card 22-1 with shackle member 21-1; Shackle member 21-1 on the described cover body 21 inserts in No. two card 22-1 on the cover body and realizes that clamping connects.
Shackle member 21-1 on the described cover body 21 of present embodiment can be two, and is separately positioned on the both sides of a cover body 21, as shown in Figure 7; Certainly, the quantity of shackle member 21-1 and position also can be arranged on other position on the cover body 21 according to actual needs No. one.In addition, also can be such situation, that is, described No. two cover bodies 22 are provided with shackle member, and the corresponding position on cover body 21 is provided with card.
In addition; connected mode between cover body 21 and No. two cover bodies 22 also can adopt other form; such as cast or adhesive means so long as can realize non-dismountable connection and need the destructive situation about just can open of disposing, all belong to the protection domain of this patent.
Preferably, a described cover body 21 is provided with protruding coupling part and/or recessed coupling part 21-2, and described No. two cover bodies 22 are provided with No. two protruding coupling parts and/or recessed coupling part 22-2; On the described mutual inductor body 1 with the corresponding section of a cover body 21 and No. two cover bodies 22, be respectively arranged with respectively and protruding coupling part and/or recessed coupling part 21-2 and No. two protruding coupling parts and/or suitable recessed coupling part and/or the protruding coupling part 1-2 of recessed coupling part 22-2, No. two protruding coupling parts on protruding coupling part on the described cover body 21 and/or recessed coupling part 21-2 and described No. two cover bodies 22 and/or recessed coupling part 22-2 respectively with mutual inductor body 1 on recessed coupling part and/or protruding coupling part 1-2 achieve a fixed connection by embedding connected mode; Be respectively arranged with a flanging 21-3 and No. two flanging 22-3 on a described cover body 21 and No. two cover bodies 22.
In addition, the cross sectional shape of described protruding coupling part and/or recessed coupling part is up-small and down-big shape, like this, can guarantee that a cover body 21 fixedlys connected with mutual inductor body 1 respectively with No. two cover bodies 22; In practical operation, a cover body 21 and No. two cover bodies 22 can be inserted from the both sides of mutual inductor body 1 respectively, after cover body 21 and No. two cover bodies 22 fasten, a flanging 21-3 and No. two flanging 22-3 are stuck on the housing of mutual inductor body 1, further play the effect that relative motion takes place between restriction cover body and the mutual inductor body 1, and be connected to one by shackle member and card, and form non-disconnectable the connection between the mutual inductor body 1.
Certainly, the degree of depth of described protruding coupling part and/or recessed coupling part and length can be according to actual needs or according to the Thickness Design of mutual inductor body 1 housing.
The cross sectional shape of protruding coupling part of the present invention and/or recessed coupling part also can design according to actual needs; Preferably can be swallow-tail form, inverse-T-shaped or " L " shape.Certainly, be understandable that this cross sectional shape is not limited to described three kinds, use needs, all belong to the protection domain of this patent as long as satisfy.
In addition, anti-electricity-theft face shield 2 of the present invention selects for use transparent material to make, such as, transparent engineering plastics.Because, long-term use, loosening phenomenon can appear being connected between power taking pressure part and the primary line, particularly, and for the situation of open air use, phenomenon is become flexible in easier appearance, thereby the accuracy rate of influence metering, therefore, the maintainer is by transparent cover body monitoring power taking pressure part and the connection state between the primary line, in time safeguard, natural loss is reduced to minimum.
Simultaneously; for be applied in the batch meter to the present invention, operating position such as metal row; anti-electricity-theft protection is all carried out in mutual inductor body 1 both sides; the described cover body 21 of present embodiment and No. two cover bodies 22 also can be respectively two; and be fixedly installed on mutual inductor body 1 both side surface respectively, as shown in Figure 2.
Embodiment three: (referring to Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Figure 11, Figure 12, Figure 13) present embodiment and embodiment one or twos' difference is that the secondary connection end of described mutual inductor body 1 is set with the anti-electricity-theft cover body 3 of secondary connection end, the other end of the anti-electricity-theft cover body 3 of described secondary connection end has a cable hole 3-1, as shown in Figure 2, particularly, the anti-electricity-theft cover body 3 of described secondary connection end is provided with shackle member 3-2, described mutual inductor body 1 is provided with the suitable card 1-4 with shackle member 3-2, and the interior realization of the card 1-4 clamping that the shackle member 3-2 on the anti-electricity-theft cover body 3 of described secondary connection end inserts on the mutual inductor body 1 connects.
Preferably, as shown in Figure 7, the anti-electricity-theft cover body 3 of described secondary connection end comprises that a cover body 31 and 32, numbers cover bodies 31 of No. two cover bodies are provided with shackle member 31-1, and No. two cover body 32 is provided with the suitable card 32-1 with shackle member 31-1; Shackle member 31-1 on the described cover body 31 inserts in No. two card 32-1 on the cover body and realizes that clamping connects; The outside surface of the secondary connection end of described mutual inductor body 1 is provided with protruding 1-3, be respectively arranged with a groove 31-2 and No. two groove 32-2s suitable with protruding 1-3 on the inwall of a described cover body 31 and No. two cover bodies 32, a described groove 31-2 and No. two groove 32-2 are installed on respectively on the protruding 1-3.More preferably, described protruding 1-3 is an annular projection.
Shackle member 31-1 on the described cover body 31 of present embodiment can be two, and is separately positioned on the both sides (as shown in Figure 7) of a cover body 31; Certainly, the quantity of shackle member 31-1 and position also can be decided according to the actual requirements.In addition, also can be such situation, that is, described No. two cover bodies 32 are provided with shackle member, and the corresponding position on cover body 31 is provided with card.
In addition, the connected mode between cover body 31 and No. two cover bodies 32 also can adopt other form, so long as can realize non-dismountable connection and need destructive the disposal just can open, all belongs to the protection domain of this patent.
In addition, the line ball piece 33 that a described cover body 31 or No. two cover bodies 32 are provided with cable deck 34 and are used with cable deck 34, line ball piece 33 is fixedlyed connected with the cable deck by screw.Like this, the triple cable that is electrically connected with the secondary connection end and the relative position of mutual inductor body 1 and cover body are fixed, and can guarantee that triple cable is reliable with being electrically connected of three terminals, and then guarantee the accuracy of electric quantity metering.Certainly, described cable deck 34 can also be a U type clamp, as long as can play the effect of attached cable, gets final product.
Further, cable hole 3-1 on the anti-electricity-theft cover body 3 of described secondary connection end is connected with corrugated tube 5 by box joint 4, as Fig. 4, shown in Figure 7, the outside dimension of the connecting portion of the internal diameter size of cable hole 3-1 and box joint 4 is suitable, and the connecting portion of box joint 4 is installed in the cable hole 2-1 on the anti-electricity-theft face shield 2 of secondary connection end and the nut by box joint 4 is fastenedly connected.Described corrugated tube 5 can be protected internal core further, realizes anti-electricity-theft purpose.
By transparent cover body monitoring cable and the connection state between the secondary line terminals, safeguard in time that the anti-electricity-theft cover body 3 of described secondary connection end also can be selected transparent material for use for ease of the maintainer, such as, transparent engineering plastics.
Because cable is walked at the cable hole 3-1 place of the anti-electricity-theft cover body 3 of secondary connection end, after the secondary connection end of cable and mutual inductor body 1 is affixed respectively, can with the anti-electricity-theft cover body 32 of secondary connection end or 31 and cable be cast into one, can realize anti-electricity-theft purpose of the present invention preferably; Certainly it will also be appreciated that, after the corrugated tube 5 that is sleeved on cable outside is finished with 4 assemblings of box joint, can be cast into one with the anti-electricity-theft cover body 3 of secondary connection end equally, therefore all should be in protection scope of the present invention.
Embodiment four: (referring to Fig. 8, Fig. 9, shown in Figure 10) present embodiment and embodiment one or twos' difference is that it also comprises the cable 6 that an end is electrically connected with the internal interface line end of mutual inductor body 1; The housing of the insulation sheath of described cable 6 appearances and the mutual inductor body 1 of secondary connection end is cast into one.
Preferably, it also comprises the corrugated tube 7 that is sleeved on cable 6 outsides, and described corrugated tube 7 also is cast into one with the housing of the mutual inductor body 1 of secondary connection end.
The described cable 6 of present embodiment is a polycore cable, to adapt to dissimilar high and low pressure current transformers.
The insulation sheath of the described cable 6 of present embodiment and the housing of mutual inductor body 1 are cast into one, electric current contact and voltage contact all are arranged in the housing of mutual inductor body 1, replaced the lead sealing that falls behind, 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.
Embodiment five: (referring to Fig. 3, Figure 11, Figure 12, Figure 14) present embodiment and embodiment one or twos' difference is, at the straight-through current transformer with anti-electricity-theft face shield of the present invention, it adopts built-in power taking to press mode, the power taking pressure part 10 that is electrically connected with the pressure-wire leading-out terminal is set on the described mutual inductor body 1, described power taking pressure part 10 is arranged on the side of the center hole 1-8 of mutual inductor body 1, and power taking pressure part 10 can radially move along center hole 1-8.The side that power taking pressure part 10 is arranged on center hole 1-8 can be avoided the power taking pressure part to occupy the inner space of center hole 1-8 and influence the use of mutual inductor, simultaneously, the power taking pressure part radially moves the needs that the mutual inductor that can make this structure adapts to different inner diameters, different cross section shape bus along center hole, therefore increases the adaptability that mutual inductor uses.
Preferably, described power taking pressure part 10 is and the metallic stud 10a of mutual inductor body 1 by thread connection; Described mutual inductor body 1 is provided with metal insert 9, the metallic stud 10a that has been threaded on the described metal insert 9, and described metal insert 9 is electrically connected with metallic stud 10a with the pressure-wire leading-out terminal, and described metal insert 9 is electrically connected with the pressure-wire leading-out terminal.As Fig. 3, Figure 11 and shown in Figure 12.
Simultaneously, carry out relative position by lead sealing 15 between described metallic stud 10a and the mutual inductor body 1 and fix, as shown in Figure 4; Break away from or the loosening collection that influences voltage signal to itself and bus to avoid electricity filching person to pass through rotating metallic double-screw bolt 10a; 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 in protection scope of the present invention.
In the present embodiment, lead between metal insert 9 and the pressure-wire outlet terminal 2 is to be injection-moulded in the housing of mutual inductor body 1 center hole 1-8 one side, specifically add man-hour, metal insert 9 can be fixed on the mutual inductor body 1 and then by lead and be connected with pressure-wire outlet terminal 2, also can be as Fig. 3 and shown in Figure 11, metal insert 9 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 schistose texture is arranged on the top of mutual inductor coil 13 and separates the mutual inductor housing of casting outside again by insulation course 14 and mutual inductor coil 13.Described structure has conspicuous advantage: metallic stud 10a, metal insert 9 all are arranged on the mutual inductor housing, they do not occupy the inner space of mutual inductor center pit, thereby do not influence the coiling diameter of coil, can guarantee mutual inductor body 1 smaller volume, save installing space.Simultaneously, the mutual inductor 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.
For by the situation of double-screw bolt as conductor power taking pressure part, preferred structure is, respectively be provided with a metal displacer key 9 in the through wires hole both sides of mutual inductor body 1, be electrically connected between two metal displacer keys, the metallic stud 10a that all has been threaded on each metal displacer key, like this, the power taking pressure part of both direction acts on bus simultaneously, feasible electrical connection is stable more and accurate, thereby better the voltage signal on the bus is passed.
In addition, the power taking pressure metallic stud 7 on the described mutual inductor body 1 has the front end of spine, as Figure 12, shown in Figure 14.The structural design of this kind power taking pressure side can be applied on the lead with insulating covering, and described spine front end can puncture the insulating covering of lead, thereby makes built-in power taking pressure part be electrically connected the extraction that realizes the wire voltage signal with the tinsel of lead.
Here to mention especially; the spine front end of described power taking pressure part can be one group of front end with needle-like or laciniation composition; be understandable that; by having the front end that needle-like or laciniation are formed; its profile is not limit; such as forming semicircle by the needle point or the sawtooth of different length; thereby just can contact the effect that guarantees that power taking is pressed well with round conductor; certainly can also be at the lead of different profiles and the front end outer shape of different power taking pressure parts is set; as long as can realize that the needle point of power taking pressure part or sawtooth puncture the wire insulation foreskin and come power taking to press, all in protection scope of the present invention.
By above-mentioned illustrative embodiments as can be known, technical scheme of the present invention is not limited thereto.For the one of ordinary skilled in the art; under the situation that does not break away from flesh and blood of the present invention; can make different modification and improvement to being connected and fixed between anti-electricity-theft face shield 2 and the mutual inductor body 1, use needs as long as satisfy, all in protection scope of the present invention.

Claims (18)

1. with the straight-through current transformer of anti-electricity-theft face shield, it comprises the mutual inductor body (1) of being with housing, it is characterized in that: it comprises that also the middle part is provided with the anti-electricity-theft face shield (2) of primary line through wires hole (2-1), and described anti-electricity-theft face shield (2) is connected by non-disconnectable mode with the surface of shell of mutual inductor body (1).
2. the straight-through current transformer with anti-electricity-theft face shield according to claim 1, it is characterized in that: described anti-electricity-theft face shield (2) is provided with shackle member (2-2), described mutual inductor body (1) is provided with and the suitable card (1-1) of shackle member (2-2), and the interior realization of card (1-1) clamping that described anti-electricity-theft face shield (2) is provided with on shackle member (2-2) the insertion mutual inductor body (1) connects.
3. the straight-through current transformer with anti-electricity-theft face shield according to claim 1 is characterized in that: described anti-electricity-theft face shield (2) comprises a cover body (21) and No. two cover bodies (22); Have between two cover bodies of annexation and connect by non-disconnectable mode.
4. the straight-through current transformer with anti-electricity-theft face shield according to claim 3 is characterized in that: the concrete structure that non-disconnectable mode connects between two cover bodies is:
A cover body (21) is provided with shackle member (21-1), and No. two cover bodies (22) are provided with and the suitable card (22-1) of shackle member (21-1); Shackle member (21-1) on the described cover body (21) is inserted in No. two card (22-1) on the cover body and is realized that clamping connects;
A described cover body (21) is provided with protruding coupling part and/or recessed coupling part (21-2), and described No. two cover bodies (22) are provided with No. two protruding coupling parts and/or recessed coupling part (22-2); On the described transformer body (1) and the corresponding section of a cover body (21) and No. two cover bodies (22); Be respectively arranged with respectively recessed coupling part and/or protruding coupling part (1-2) suitable with protruding coupling part and/or recessed coupling part (21-2) and No. two protruding coupling parts and/or recessed coupling part (22-2), No. two protruding coupling parts on protruding coupling part on the described cover body (21) and/or recessed coupling part (21-2) and described No. two cover bodies (22) and/or recessed coupling part (22-2) respectively with transformer body (1) on recessed coupling part and/or protruding coupling part (1-2) achieve a fixed connection by embedding connected mode.
5. the straight-through current transformer with anti-electricity-theft face shield according to claim 4 is characterized in that: the cross sectional shape of described protruding coupling part and/or recessed coupling part is up-small and down-big shape.
6. the straight-through current transformer with anti-electricity-theft face shield according to claim 5 is characterized in that: the cross sectional shape of described protruding coupling part and/or recessed coupling part is swallow-tail form, inverse-T-shaped or " L " shape.
7. the straight-through current transformer with anti-electricity-theft face shield according to claim 6 is characterized in that: described anti-electricity-theft face shield (2) is two, is fixedly installed on respectively on mutual inductor body (1) the through wires hole end faces of both sides.
8. the straight-through current transformer with anti-electricity-theft face shield according to claim 7 is characterized in that: described anti-electricity-theft face shield (2) is made by transparent material.
9. according to claim 1,2 or 3 described straight-through current transformers with anti-electricity-theft face shield, it is characterized in that: the shape of described primary line through wires hole (2-1) and the cross sectional shape of primary line are suitable.
10. the straight-through current transformer with anti-electricity-theft face shield according to claim 1, it is characterized in that: it also comprises the non-disconnectable anti-electricity-theft cover body of secondary connection end (3) that is connected of an end and mutual inductor body (1), and the other end of the anti-electricity-theft cover body of described secondary connection end (3) has a cable hole (3-1).
11. the straight-through current transformer with anti-electricity-theft face shield according to claim 10, it is characterized in that: the anti-electricity-theft cover body of described secondary connection end (3) comprises a cover body (31) and No. two cover bodies (32), a cover body (31) is provided with shackle member (31-1), and No. two cover bodies (32) are provided with and the suitable card (32-1) of shackle member (31-1); Shackle member (31-1) on the described cover body (31) is inserted in No. two card (32-1) on the cover body and is realized that clamping connects; The outside surface of the secondary connection end of described mutual inductor body (1) is provided with projection (1-3), be respectively arranged with on the inwall of a described cover body (31) and No. two cover bodies (32) and projection (1-3) suitable groove (31-2) and No. two grooves (32-2), a described groove (31-2) and No. two grooves (32-2) are installed on respectively on the projection (1-3).
12. the straight-through current transformer with anti-electricity-theft face shield according to claim 11, it is characterized in that: the cable hole (3-1) on the anti-electricity-theft cover body of described secondary connection end (3) is connected with corrugated tube (5) by box joint (4), the outside dimension of the connecting portion of the internal diameter size of cable hole (3-1) and box joint (4) is suitable, and the connecting portion of box joint (4) is installed in the cable hole (3-1) on the anti-electricity-theft cover body of secondary connection end (3) and the nut by box joint (4) is fastenedly connected.
13. the straight-through current transformer with anti-electricity-theft face shield according to claim 1 is characterized in that: it also comprises the cable (6) that an end is electrically connected with the internal interface line end of mutual inductor body (1); The housing of the insulated hull of described cable (6) appearance and the mutual inductor body (1) of secondary connection end is cast into one.
14. the straight-through current transformer with anti-electricity-theft face shield according to claim 13, it is characterized in that: it also comprises the corrugated tube (7) that is sleeved on cable (6) outside, and described corrugated tube (7) also is cast into one with the housing of the mutual inductor body (1) of secondary connection end.
15. the straight-through current transformer with anti-electricity-theft face shield according to claim 1, it is characterized in that: described mutual inductor body (1) is gone up the power taking pressure part (10) that is electrically connected with the pressure-wire leading-out terminal is set, described power taking pressure part (10) is arranged on a side of the center hole (1-8) of mutual inductor body (1), and power taking pressure part (10) can radially move along center hole (1-8).
16. the straight-through current transformer with anti-electricity-theft face shield according to claim 15 is characterized in that described power taking pressure part (10) is and the metallic stud (10a) of mutual inductor body (1) by thread connection; Described mutual inductor body (1) is provided with metal insert (9), the metallic stud (10a) that has been threaded on the described metal insert (9), and described metal insert (9) is electrically connected with pressure-wire outlet terminal (2).
17. the straight-through current transformer with anti-electricity-theft face shield according to claim 16 is characterized in that carrying out relative position by lead sealing (15) between described metallic stud (10a) and the mutual inductor body (1) fixes.
18. according to claim 15 or 16 described straight-through current transformers with anti-electricity-theft face shield, it is characterized in that: the power taking on the described mutual inductor body (1) presses metallic stud (10a) to have the front end of spine.
CN2007100514630A 2007-02-02 2007-02-02 Straight-through current transformer with anti-theft electric surface shield Expired - Fee Related CN101034099B (en)

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CN2007100514630A CN101034099B (en) 2007-02-02 2007-02-02 Straight-through current transformer with anti-theft electric surface shield
PCT/CN2008/000279 WO2008095415A1 (en) 2007-02-02 2008-02-02 A core-through type current transformer with an anti-theft veil for easily detecting voltage

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