CN105632693A - High-voltage power zero sequence current transformer for power transmission and distribution lines - Google Patents

High-voltage power zero sequence current transformer for power transmission and distribution lines Download PDF

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Publication number
CN105632693A
CN105632693A CN201610093704.7A CN201610093704A CN105632693A CN 105632693 A CN105632693 A CN 105632693A CN 201610093704 A CN201610093704 A CN 201610093704A CN 105632693 A CN105632693 A CN 105632693A
Authority
CN
China
Prior art keywords
clamp
stem
arranged
pressure pipe
current transformer
Prior art date
Application number
CN201610093704.7A
Other languages
Chinese (zh)
Inventor
胡小青
Original Assignee
胡小青
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 胡小青 filed Critical 胡小青
Priority to CN201610093704.7A priority Critical patent/CN105632693A/en
Publication of CN105632693A publication Critical patent/CN105632693A/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/06Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • HELECTRICITY
    • H01BASIC ELECTRIC 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
    • H01F38/38Instruments transformers for polyphase ac

Abstract

The invention discloses a high-voltage power zero sequence current transformer for power transmission and distribution lines. The current transformer comprises a base tube, a core column, a bolt, a current transformer body and a clamping plate assembly; wherein the base tube comprises a compression tube part and a sealing plate part which are arranged fixedly relatively; the sealing plate part is provided with limit sliding holes and threading holes; compression joint bosses are arranged on the inner wall of the compression tube part; a conic compression joint side is arranged on the outer circumferential wall of the core column; a central hole is arranged at the center of the core column along the axial direction of the compression tube part; the clamping plate assembly comprises line clamping plates; the inner wall of each line clamping plate is provided with a guide sliding table used for limiting the core column from moving in a reciprocating way along the axial direction of the compression tube part; each line clamping plate is provided with a guide chute used for limiting the clamping plate from moving in a reciprocating way along the radial direction of the compression tube part; each compression joint boss is provided with a limit sliding column in fit with the corresponding guide chute ; each line clamping plate faces one corresponding compression joint boss; the current transformer body comprises an annular induction body; each line clamping hole is placed in the hole cavity of the annular induction body; the bolt is rotated to drive each line clamping plate to move along the radial direction of the compression tube part. The current transformer disclosed by the invention is relatively compact and reasonable in structure and easy to install.

Description

Electric line high-tension electricity zero sequence current mutual inductor

Technical field

The invention belongs to technical field of electric power, be specifically related to a kind of electric line high-tension electricity zero sequence current mutual inductor.

Background technology

The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the algebraical sum of telegram in reply stream of any node in circuit equal to zero. Under circuit with the normal situation of electrical equipment, the vector of each phase current is equal to zero, and therefore, the secondary side winding no signal output of zero sequence current mutual inductor, executive component is failure to actuate. When the vector of each phase current occurring to get an electric shock or during leak current fault is not zero, fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and produced by zero sequence current mutual inductor, electric current is zero-sequence current. When protection mechanism receives this zero sequence current signal, corresponding protection act can be taked according to electrical leakage quantity.

Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, and its installation site is it is generally required to reserve, so that the application of zero sequence current mutual inductor is subject to more restriction.

Summary of the invention

It is an object of the invention to provide and a kind of be easily installed location, there is the electric line high-tension electricity zero sequence current mutual inductor of better firmness.

The technical scheme realizing the object of the invention is: a kind of electric line high-tension electricity zero sequence current mutual inductor, including base tube, stem stem, bolt, current transformer and cleat assembly; Base tube includes pressure pipe portion and shrouding portion; Shrouding portion and pressure pipe portion are relatively fixed setting; Shrouding portion is provided with spacing slide opening and through wires hole; The inwall in pressure pipe portion is provided with at least three crimping boss; Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with at least three jacking sliding groove and the taper electrolysis as each jacking sliding groove bottom wall along pressure pipe portion; The center of stem stem is axially arranged with centre bore along pressure pipe portion; Cleat assembly includes at least three clamp; The inwall of clamp is provided with the guiding slide unit adaptive with jacking sliding groove; Each clamp is provided with guide chute; Each crimping boss is provided with adaptive with guide chute thus the spacing traveller of spacing clamp moving direction; A corresponding crimping boss is just arranged by clamp, and each clamp and a corresponding crimping boss clamping form a clamp hole; Each through wires hole in shrouding portion connects with a corresponding clamp hole; Bolt includes the body of rod, be arranged on the fastening part of body of rod one end, the male threaded joint that is arranged on body of rod periphery wall and and the adaptive nut of male threaded joint; The fastening position of bolt is in the stem stem side away from shrouding portion, and the body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing slide opening in shrouding portion, and nut is twisted solid on the male threaded joint of bolt stretching out shrouding portion; Current transformer includes toroidal inductive body; Each clamp hole is respectively positioned in the vestibule of toroidal inductive body; Each two side crimping boss is provided with two spacing travellers protruded towards center, pressure pipe portion; Axially being respectively arranged at the two ends with a positive stop lug boss on the two side of each clamp, these two positive stop lug boss clampings form described guide chute; Each spacing traveller crimping boss is arranged in a corresponding guide chute, and clamp moves along spacing traveller direction; Each guiding slide unit has the conical outer wall adaptive with stem stem jacking sliding groove, and this conical outer wall substantially also serves as the inwall of clamp; When the guiding slide unit of each clamp is arranged in stem stem jacking sliding groove, the outer wall of this clamp is parallel with the inwall of crimping boss; Swivel bolt pulls stem stem to move towards the direction close to shrouding portion; Stem stem pushes the guiding slide unit of each clamp by the taper electrolysis in jacking sliding groove, and then promotes each clamp to make its being moved radially outward along pressure pipe portion, thus clamping is arranged in the electric power cable in clamp hole.

The present invention has positive effect: the zero sequence current mutual inductor of (1) present invention is owing to carrying press claw type retaining mechanism, it is not necessary to reserved installation position, it is easy to install. (2) structure comparatively compact and reasonable; Stem stem and bolt connect threadably, and make it clamp electric power cable by the taper electrolysis each clamp of crimping of jacking sliding groove, and its operation is comparatively laborsaving. (3) under the engagement of anticreep chisel teeth and anticreep tooth locks, also there is good anti-loosening effect.

Accompanying drawing explanation

The one that Fig. 1 is the first structure of the present invention partly cuts open structural representation;

Fig. 2 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer;

Fig. 3 be zero sequence current mutual inductor shown in Fig. 2 from another angle observe time a kind of perspective view;

Fig. 4 is that shown in Fig. 2, the one of zero sequence current mutual inductor faces structural representation;

Fig. 5 is the A-A sectional view of Fig. 4;

Fig. 6 is a kind of perspective view of base tube in zero sequence current mutual inductor shown in Fig. 2;

Fig. 7 is that shown in Fig. 6, the one of base tube partly cuts open structural representation;

Fig. 8 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2;

Fig. 9 be zero sequence current mutual inductor shown in Fig. 2 from another angle observe time a kind of explosive view;

The one that Figure 10 is after the second structure of the present invention removes current transformer partly cuts open structural representation.

Detailed description of the invention

(embodiment 1)

The present embodiment is a kind of electric line high-tension electricity zero sequence current mutual inductor, sees shown in Fig. 1 to Fig. 9, including base tube 1, stem stem 2, bolt 3, current transformer 7 and cleat assembly 4; Described base tube 1, stem stem 2 and cleat assembly 4 all adopt insulant to make.

Base tube 1 includes pressure pipe portion 11 and is positioned at the shrouding portion 12 of one end, pressure pipe portion; The shape in pressure pipe portion is circular, and the inwall in pressure pipe portion is provided with crimping boss 13, and the inwall of crimping boss is provided with arcuate groove 14. Base tube is made into integration, and crimping boss projects radially inwards formation from the inwall in pressure pipe portion, and crimping boss axially penetrates through the inwall in pressure pipe portion along pressure pipe portion.

In the present embodiment, pressure pipe portion is provided with four crimping boss, and these four crimping boss are evenly distributed on the inwall in pressure pipe portion along the circumference in pressure pipe portion.

Each two side crimping boss is provided with two spacing travellers 15 protruded towards center, pressure pipe portion, and spacing traveller is radially arranged along pressure pipe portion.

Shrouding portion 12 is provided with through wires hole 16 and spacing slide opening 17; In the present embodiment, shrouding portion is provided with a spacing slide opening and four through wires holes; Spacing slide opening is arranged on the center in shrouding portion, and through wires hole is uniformly arranged on the outer circumferential side of spacing hole.

Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with along pressure pipe portion four jacking sliding grooves 21, each jacking sliding groove is additionally provided with multiple anticreep chisel teeth 22; The center of stem stem is axially arranged with centre bore 23 along pressure pipe portion. The diapire of each jacking sliding groove is as taper electrolysis 211.

Cleat assembly includes four clamps 41; The guiding slide unit 411 that the inwall of each clamp is provided with and jacking sliding groove is adaptive, axially arranged along pressure pipe portion of guiding slide unit; The outer wall of each clamp is provided with arc clip slot 412, and the two side of each clamp is additionally provided with guide chute 413; Each spacing traveller crimping boss is arranged in a corresponding guide chute so that clamp moves along spacing traveller direction; In the present embodiment, each spacing traveller being radially arranged along pressure pipe portion, therefore clamp moves back and forth only along the radial direction in pressure pipe portion.

In the present embodiment, the two side of each clamp being axially respectively arranged at the two ends with a positive stop lug boss 417, these two positive stop lug boss clampings form described guide chute 413.

In the present embodiment, each guiding slide unit has the taper stress surface adaptive with stem stem jacking sliding groove bottom wall, and this taper stress surface substantially also serves as the inwall 414 of clamp; When the guiding slide unit of each clamp is arranged in stem stem jacking sliding groove, the outer wall 415 of clamp is parallel with the inwall 131 of a corresponding crimping boss; A corresponding crimping boss is just arranged by each clamp, and each arc clip slot and a corresponding arcuate groove clamping form a clamp hole 5, and the present embodiment forms four clamp holes altogether; A corresponding clamp hole is also just arranged by each through wires hole in shrouding portion.

Stem stem is under the spacing mating reaction of the guiding slide unit of its jacking sliding groove and clamp, it is impossible to rotate in pressure pipe portion, only along moving axially of pressure pipe portion.

Each conical outer wall of guiding slide unit namely the inwall 414 of clamp are provided with multiple anticreep tooth 416, and each anticreep tooth engages for the anticreep chisel teeth with stem stem, anti-skidding anti-retrogression.

Current transformer includes toroidal inductive body 71 and intelligent control module 72; In the present embodiment, intelligent control module 72 is made has the ring-type of onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are arranged side by side combination and form annular, on the overall sheathed outer wall being fixed on base tube of current transformer. In concrete practice, as long as making all clamp holes be arranged in the vestibule of toroidal inductive body, namely have only to so that the vestibule of cable traverse toroidal inductive body.

The present embodiment has four clamp holes, but in concrete practice, it is possible to only three electric power cables of clamping, a unnecessary clamp hole is standby or is used for clamping other auxiliary wire rod; During three electric power cables of clamping, toroidal inductive body may be used for sensing zero sequence current signal, finds leak current fault in time, now can use as a zero sequence current mutual inductor.

In concrete practice, it is possible to the present embodiment is made the structure only with three clamp holes.

Intelligent control module includes wireless transmit/receive units, and the current signal that intelligent control module is sensed toroidal inductive body by wireless transmit/receive units sends distance host to, to realize the long-range no worker monitor of precision.

Bolt includes the body of rod 31, be arranged on the fastening part 32 of body of rod one end, the male threaded joint 33 that is arranged on body of rod periphery wall and and the adaptive nut 34 of male threaded joint; The fastening position of bolt is in the stem stem side away from shrouding portion, and the body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing slide opening in shrouding portion, until male threaded joint stretches out shrouding portion, nut is twisted solid on the male threaded joint of bolt stretching out shrouding portion.

The external diameter of bolt fastening part is more than the aperture of stem stem centre bore, and the external diameter of nut is more than the aperture of the spacing slide opening in shrouding portion.

Swivel bolt pulls stem stem to move towards the direction close to shrouding portion; Stem stem pushes the guiding slide unit of each clamp by the taper electrolysis in jacking sliding groove, and then promotes each clamp to make its being moved radially outward along pressure pipe portion, thus clamping is arranged in the electric power cable in clamp hole.

The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each arcuate groove and arc clip slot; Specifically, the radially protruding along core pipe portion is respectively punctured.

In the present embodiment, each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; In concrete practice, puncture may be used without alternate manner and makes; In each arcuate groove, such as it is provided with multiple installation draw-in groove, then the puncture sheet adopting insulant to make is inlaid in corresponding one and installs in draw-in groove; Puncturing sheet include installation portion and sting blade, installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture. In concrete practice, it is also possible to adopt in the mode being threaded in each arc clip slot and arcuate groove, also can improving clamping sigma compactness energy.

In concrete practice, it is also possible to adopt in the mode being threaded in each arc clip slot and arcuate groove, also can improving clamping sigma compactness energy.

The present embodiment has following Advantageous Effects: (1) operation is comparatively laborsaving, has good anti-loosening effect.

(embodiment 2)

The present embodiment and embodiment 1 are essentially identical, are different in that: as shown in Figure 10, and the bolt in the present embodiment no longer includes nut 34, and the present embodiment is arranged to the internal threaded regions 171 adaptive with bolt male threaded joint in the spacing slide opening in shrouding portion; The body of rod of bolt is spirally connected through the centre bore of stem stem, the male threaded joint of bolt and this internal threaded regions.

The present embodiment saves a nut, and structure comparatively simplifies.

Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also cannot all of embodiment be given exhaustive. And the apparent change that these connotations belonging to the present invention are extended out or variation still fall within protection scope of the present invention.

Claims (1)

1. an electric line high-tension electricity zero sequence current mutual inductor, it is characterised in that: include base tube, stem stem, bolt, current transformer and cleat assembly; Base tube includes pressure pipe portion and shrouding portion; Shrouding portion and pressure pipe portion are relatively fixed setting; Shrouding portion is provided with spacing slide opening and through wires hole; The inwall in pressure pipe portion is provided with at least three crimping boss; Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with at least three jacking sliding groove and the taper electrolysis as each jacking sliding groove bottom wall along pressure pipe portion; The center of stem stem is axially arranged with centre bore along pressure pipe portion; Cleat assembly includes at least three clamp; The inwall of clamp is provided with the guiding slide unit adaptive with jacking sliding groove; Each clamp is provided with guide chute; Each crimping boss is provided with adaptive with guide chute thus the spacing traveller of spacing clamp moving direction; A corresponding crimping boss is just arranged by clamp, and each clamp and a corresponding crimping boss clamping form a clamp hole; Each through wires hole in shrouding portion connects with a corresponding clamp hole; Bolt includes the body of rod, be arranged on the fastening part of body of rod one end, the male threaded joint that is arranged on body of rod periphery wall and and the adaptive nut of male threaded joint; The fastening position of bolt is in the stem stem side away from shrouding portion, and the body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing slide opening in shrouding portion, and nut is twisted solid on the male threaded joint of bolt stretching out shrouding portion; Current transformer includes toroidal inductive body; Each clamp hole is respectively positioned in the vestibule of toroidal inductive body; Each two side crimping boss is provided with two spacing travellers protruded towards center, pressure pipe portion; Axially being respectively arranged at the two ends with a positive stop lug boss on the two side of each clamp, these two positive stop lug boss clampings form described guide chute; Each spacing traveller crimping boss is arranged in a corresponding guide chute, and clamp moves along spacing traveller direction; Each guiding slide unit has the conical outer wall adaptive with stem stem jacking sliding groove, and this conical outer wall substantially also serves as the inwall of clamp; When the guiding slide unit of each clamp is arranged in stem stem jacking sliding groove, the outer wall of this clamp is parallel with the inwall of crimping boss; Swivel bolt pulls stem stem to move towards the direction close to shrouding portion; Stem stem pushes the guiding slide unit of each clamp by the taper electrolysis in jacking sliding groove, and then promotes each clamp to make its being moved radially outward along pressure pipe portion, thus clamping is arranged in the electric power cable in clamp hole.
CN201610093704.7A 2016-01-15 2016-01-15 High-voltage power zero sequence current transformer for power transmission and distribution lines CN105632693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610093704.7A CN105632693A (en) 2016-01-15 2016-01-15 High-voltage power zero sequence current transformer for power transmission and distribution lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610093704.7A CN105632693A (en) 2016-01-15 2016-01-15 High-voltage power zero sequence current transformer for power transmission and distribution lines

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CN105632693A true CN105632693A (en) 2016-06-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712063A1 (en) * 1977-03-15 1978-09-21 Siemens Ag Inductive, gas or fluessigkeitsisolierter voltage converters
CN202159088U (en) * 2011-08-04 2012-03-07 大庆电业局 Remote online monitoring system of electric transmission line lightning arrester
CN102510128A (en) * 2011-10-27 2012-06-20 王成楷 Intelligent electric leakage remote monitoring protector of low-voltage power grid
CN104374964A (en) * 2014-11-05 2015-02-25 江苏省电力公司常州供电公司 Electric energy meter capable of measuring residual currents
CN104607681A (en) * 2013-11-03 2015-05-13 西安志越机电科技有限公司 Thin-wall round pipe turning and clamping device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712063A1 (en) * 1977-03-15 1978-09-21 Siemens Ag Inductive, gas or fluessigkeitsisolierter voltage converters
CN202159088U (en) * 2011-08-04 2012-03-07 大庆电业局 Remote online monitoring system of electric transmission line lightning arrester
CN102510128A (en) * 2011-10-27 2012-06-20 王成楷 Intelligent electric leakage remote monitoring protector of low-voltage power grid
CN104607681A (en) * 2013-11-03 2015-05-13 西安志越机电科技有限公司 Thin-wall round pipe turning and clamping device
CN104374964A (en) * 2014-11-05 2015-02-25 江苏省电力公司常州供电公司 Electric energy meter capable of measuring residual currents

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Application publication date: 20160601