CN105761889A - High-voltage electricity zero-sequence current transformer for electric transmission line - Google Patents
High-voltage electricity zero-sequence current transformer for electric transmission line Download PDFInfo
- Publication number
- CN105761889A CN105761889A CN201610093701.3A CN201610093701A CN105761889A CN 105761889 A CN105761889 A CN 105761889A CN 201610093701 A CN201610093701 A CN 201610093701A CN 105761889 A CN105761889 A CN 105761889A
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- stem
- clamp
- bolt
- current transformer
- pressure pipe
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a high-voltage electricity zero-sequence current transformer for an electric transmission line.The high-voltage electricity zero-sequence current transformer comprises a base pipe, a core column, a bolt, a current transformer body and a clamping plate assembly.The base pipe comprises a pressing pipe part and a sealing plate part.The sealing plate part and the pressing pipe part are fixedly arranged relatively.The sealing plate part is provided with a limiting slide hole and a line threading hole.Pressing joint bosses are arranged on the inner wall of the pressing pipe part.A conical pressing joint face is arranged on the peripheral wall of the core column.A center hole is formed in the center of the core column in the axial direction of the pressing pipe part.The clamping plate assembly comprises line clamping plates.The inner wall of each line clamping plate is provided with a guide slide table used for limiting the core column to move in a reciprocating mode in the axial direction of the pressing pipe part.Each line clamping plate is provided with a guide slide groove used for limiting the clamping plate to move in a reciprocating mode in the radial direction of the pressing pipe part.All the pressing joint bosses are provided with limiting slide columns matched with the guide slide grooves.Each line clamping plate directly faces one corresponding pressing joint boss.The current transformer body comprises an annular induction body.All line clamping holes are located in a hole cavity of the annular induction body.The bolt is rotated to push all the line clamping plates to move in the radial direction of the pressing pipe part.The current transformer is compact and reasonable in structure and easy to install.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of high-tension electricity zero sequence current mutual inductor used for transmission line.
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 high-tension electricity zero sequence current mutual inductor used for transmission line of better firmness.
The technical scheme realizing the object of the invention is: a kind of high-tension electricity zero sequence current mutual inductor used for transmission line, 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；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；The inwall of crimping boss is provided with arcuate groove；The outer wall of clamp is provided with arc clip slot, each arc clip slot and a corresponding arcuate groove clamping and forms a clamp hole；Each arc clip slot and arcuate groove are provided with multiple puncture；Being provided with multiple installation draw-in groove in each arc clip slot and arcuate groove, each installation in draw-in groove is embedded with a piercing blade；Each sheet that punctures includes installation portion and stings blade, and installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture；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 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 high-tension electricity zero sequence current mutual inductor used for transmission line, 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. a high-tension electricity zero sequence current mutual inductor used for transmission line, 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；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；The inwall of crimping boss is provided with arcuate groove；The outer wall of clamp is provided with arc clip slot, each arc clip slot and a corresponding arcuate groove clamping and forms a clamp hole；Each arc clip slot and arcuate groove are provided with multiple puncture；Being provided with multiple installation draw-in groove in each arc clip slot and arcuate groove, each installation in draw-in groove is embedded with a piercing blade；Each sheet that punctures includes installation portion and stings blade, and installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture；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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093701.3A CN105761889A (en) | 2016-01-15 | 2016-01-15 | High-voltage electricity zero-sequence current transformer for electric transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093701.3A CN105761889A (en) | 2016-01-15 | 2016-01-15 | High-voltage electricity zero-sequence current transformer for electric transmission line |
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| Publication Number | Publication Date |
|---|---|
| CN105761889A true CN105761889A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610093701.3A Pending CN105761889A (en) | 2016-01-15 | 2016-01-15 | High-voltage electricity zero-sequence current transformer for electric transmission line |
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| CN (1) | CN105761889A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5789038B1 (en) * | 2014-12-01 | 2015-10-07 | 恒和工業株式会社 | Electric wire connector |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
-
2016
- 2016-01-15 CN CN201610093701.3A patent/CN105761889A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5789038B1 (en) * | 2014-12-01 | 2015-10-07 | 恒和工業株式会社 | Electric wire connector |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
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Application publication date: 20160713 |
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| RJ01 | Rejection of invention patent application after publication |