CN105761893A - Zero-sequence current mutual inductor - Google Patents
Zero-sequence current mutual inductor Download PDFInfo
- Publication number
- CN105761893A CN105761893A CN201610098632.5A CN201610098632A CN105761893A CN 105761893 A CN105761893 A CN 105761893A CN 201610098632 A CN201610098632 A CN 201610098632A CN 105761893 A CN105761893 A CN 105761893A
- Authority
- CN
- China
- Prior art keywords
- core pipe
- paw
- crimp
- mutual inductor
- plate portion
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
-
- 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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a zero-sequence current mutual inductor which comprises a core pipe, a current mutual inductor body, two pressing jaw assemblies, two plane nuts and six pressure welding elements.Six radial limiting sliding holes are formed in the pipe wall of the core pipe.Each pressure welding element is provided with a pressing plate part and an anti-disengaging connection part.The pressure welding elements are detachably arranged on the core pipe through the anti-disengaging connecting parts.Each pressing jaw assembly comprises three pressing jaws.Each pressing jaw comprises a top plate part, a guide slider part and a drive thread part.Each guide slider part is inserted into the corresponding radial limiting sliding hole in the core pipe.The drive thread parts stretch into a pipe cavity of the core pipe.The plane nuts are rotationally arranged in the pipe cavity of the core pipe.Each plane nut comprises a plane thread part.The current mutual inductor body comprises an annular base body.Each plane nut drives the pressing jaws in the corresponding pressing jaw assembly to be close to or far away from the center of the core pipe.The zero-sequence current mutual inductor has the excellent anti-loosening effect.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of 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, therefore makes its application be 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 better firmness, effectively prevent the zero sequence current mutual inductor that loosens.
The technical scheme realizing the object of the invention is: a kind of zero sequence current mutual inductor, including a core pipe, current transformer, two casing pressure claw assemblies, two plane nuts and six crimps；The tube wall of core pipe is provided with six spacing slide openings of radial direction；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at outside core pipe；Each casing pressure claw assembly includes three paws for forming three clamp holes with crimp combination；Each paw includes top plate portion, from the guide runner portion of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion that is arranged on guide runner portion；Top plate portion is positioned at outside core pipe, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms a clamp hole for clamping electric power cable；Guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, drives threaded portion to stretch in the tube chamber of core pipe；Each plane nut rotation is arranged in core pipe tube chamber；Each plane nut includes engaging the flat thread portion of adaptation with the threaded portion that drives of paw in corresponding a set of paw assembly；Current transformer includes annular matrix, and clamp hole is arranged in the vestibule of annular matrix；Each plane nut drives its flat thread portion reciprocating rotation, so drive paw in corresponding a set of paw assembly towards core tube hub closer or far from, thus unclamping or clamping the electric power cable being arranged in clamp hole.
In technique scheme, the periphery wall of plane nut and core inside pipe wall slide adjacent；Plane nut center is provided with fastening part；Fastening part is regular polygon fastener hole or regular polygon binding groove；Crimp is identical with the quantity of paw.
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 installing, and have good anti-loosening effect, firm intensity is relatively high and stable reliably.(2) present invention compares with by traditional bolt assembly clamping electric power cable, it is possible to applies bigger pressure, and has excellent anti-loosening effect, is effectively ensured the reliability of long-term work.(3) present invention adopts two casing pressure claw assemblies to be clamped on same cable, has the effect of dual fail-safe, in use goes wrong even if wherein a set of, also has its service behaviour of another set of guarantee.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the present invention；
Fig. 2 is a kind of front view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 3 is that shown in Fig. 1, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 4 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 5 is a kind of front view of zero sequence current mutual inductor shown in Fig. 4；
Fig. 6 is that shown in Fig. 4, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 7 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 4.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of zero sequence current mutual inductor, sees shown in Fig. 1 to Fig. 7, overlaps crimp assemblies and a current transformer 8 including 3, two plane nuts 4, two of a core pipe 2, two casing pressure claw assembly.
The tube wall of core pipe is provided with six spacing slide openings 22 of radial direction, and each radially spacing slide opening all extends radially through core tube wall along core pipe；Each radially spacing slide opening is positioned at core pipe middle part axially, and the radial cross-sectional shape of each radially spacing hole is I-shaped；The internal perisporium of core pipe is provided with the annular gear platform 23 of inwardly projecting formation.In the present embodiment, six radial direction spacing holes are divided into two groups, and the radially spacing holes of three in each group are for adaptive with corresponding a set of paw assembly.
Each set crimp assemblies is for adaptive with corresponding a set of paw assembly, and each set crimp assemblies all includes three crimps 1；Each crimp is provided with pressing plate portion 11 and anticreep connecting portion 12；Crimp is arranged on core pipe by anticreep connecting portion is dismountable；Pressing plate portion 11 is axially extending along core pipe, and the inwall in pressing plate portion is provided with arcuate groove 13, and the periphery wall in pressing plate portion is circular arc；Anticreep connecting portion is two the post plates protruding inwardly from formation from pressing plate portion two side ends, and each post plate is axially extending along core pipe, and the radial cross-sectional shape of each post plate is L-shaped；In the present embodiment, two L-shaped post plates are oppositely arranged；
The periphery wall of core pipe is provided with three anticreep chutes 24 for installing location crimp vertically；Each anticreep chute includes the mounting groove 241 that two radial sections are L-shaped；In the present embodiment, two adjacent anticreep chutes are oppositely arranged；Each mounting groove and a corresponding post plate are adaptive；The anticreep connecting portion of each crimp slips into a corresponding anticreep chute along core pipe axial direction from a side of anticreep chute；In concrete practice, anticreep connecting portion can select other shape, as long as making the anticreep connecting portion of crimp can not remove along core caliber to from anticreep chute；In concrete practice, it is possible to select the mode of clamping that fixing crimp is installed；Multiple draw-in groove is such as set on the periphery wall of core pipe, each pressing plate arranges the clamping support column or clamping gripper shoe that protrude inwardly from, each clamping support column or clamping gripper shoe are directly snapped in a corresponding draw-in groove, also preventing shackle member from removing core pipe along core pipe radial direction, this structure is also feasible.
The inwall of a corresponding crimp is just arranged by each radially spacing slide opening.
In concrete practice, also two crimps axially adjacent along core pipe can be made of one part, then two set crimp assemblies in the present embodiment just unite two into one and become a set of crimp assemblies.
Each casing pressure claw assembly includes three paws 5 for forming clamp hole with crimp combination；Each paw includes top plate portion 51, from the guide runner portion 52 of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion 53 that is arranged on guide runner portion；Top plate portion is axially extending along core pipe, and guide runner portion radially extends along core pipe；The outer wall of paw top plate portion is provided with arc clip slot 511；Each paw top plate portion is positioned at outside core pipe, and just the pressing plate portion of a corresponding crimp is arranged；Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, in each tube chamber driving threaded portion to stretch to core pipe；Each paw reciprocatingly slides along the radial direction of core pipe under the guide and limit effect of radially spacing slide opening；The radial cross-sectional shape in each guide runner portion is adaptive with radial direction spacing hole I-shaped.
In the present embodiment, the arcuate groove of a corresponding crimping boss is just arranged by the arc clip slot of each paw, and the arcuate groove clamping of the arc clip slot of this paw and this crimping boss forms a clamp hole 6, and each clamp hole is used for clamping an electric power cable；The present embodiment forms three clamp holes altogether, altogether three electric power cables of clamping.Current transformer 8 includes annular matrix 81 and intelligent control module 82, intelligent control module can include wireless transmit/receive units, when three electric power cables have leakage current, annular matrix will induce secondary current, and intelligent control module sends distance host by wireless transmit/receive units to this secondary current information；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall, thus making full use of space, is conducive to the small-sized and integrated of entirety.
Two plane nut rotations are arranged in core pipe tube chamber, and are positioned at the both sides of annular gear platform；Each plane nut includes engaging the flat thread portion 41 of adaptation with the threaded portion that drives of paw in corresponding a set of paw assembly and being positioned at the fastening part 42 of plane nut center；One side of the adjacent paw assembly of each plane nut arranges flat thread portion, another side of each plane nut and core pipe gear platform and slides adjacent；The periphery wall of each plane nut and core inside pipe wall slide adjacent；Flat thread portion is annular, and flat thread portion is provided with archimedean spiral groove, the thread groove that driving threaded portion is provided with and this archimedean spiral groove is adaptive of paw assembly, each side driving threaded portion to be arranged on guide runner portion, place adjacent flat nut.
In the present embodiment, the fastening part of each plane nut is interior hexagonal shape fastener hole or interior hexagonal shape binding groove, and it is twisted operation and adopts inner hexagon spanner；In concrete practice, described fastening part just can adopt other shape, for instance square or in-line or quincunx, all can select.
Current transformer 8 includes annular matrix 81 and intelligent control module 82, intelligent control module can include wireless transmit/receive units, when three electric power cables have leakage current, annular matrix will induce secondary current, and intelligent control module sends distance host by wireless transmit/receive units to this secondary current information；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall, thus making full use of space, is conducive to the small-sized and integrated of entirety.
Each plane nut is in reciprocating rotation, drive its flat thread portion reciprocating rotation, and then drive the paw in corresponding a set of paw assembly by engaging the threaded portion that drives of adaptation, owing to each paw radial direction only along core pipe under the guide and limit effect of radially spacing slide opening moves back and forth, so that in corresponding a set of paw assembly the move mode of paw be close to each other towards core tube hub or away from, thus unclamping or clamping the electric power cable being arranged in clamp hole.
When the present embodiment is on the overhead power line of high-altitude, be conducive to alleviating vibration；It addition, the present embodiment drives paw clamping electric power cable by flat thread portion, compare with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, it is effectively ensured the reliability of long-term work.Additionally, due to crimp is to be arranged on core pipe by sliding or crimping mode, it is possible to first cable is placed in the arc clip slot of each paw, more corresponding crimp is loaded in corresponding anticreep chute, corresponding electric power cable can be placed in clamp hole；This structure makes the easy to operation of clamping electric power cable.Finally, due to the fact that and have employed two casing pressure claw assemblies for clamping electric power cable, also there is the technique effect of dual fail-safe.
The present embodiment entirety can use as high pressure zero sequence current mutual inductor, for detecting the existence of leakage current, finds leak current fault in time.
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 (2)
1. a zero sequence current mutual inductor, it is characterised in that: include a core pipe, current transformer, two casing pressure claw assemblies, two plane nuts and six crimps；The tube wall of core pipe is provided with six spacing slide openings of radial direction；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at outside core pipe；Each casing pressure claw assembly includes three paws for forming three clamp holes with crimp combination；Each paw includes top plate portion, from the guide runner portion of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion that is arranged on guide runner portion；Top plate portion is positioned at outside core pipe, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms a clamp hole for clamping electric power cable；Guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, drives threaded portion to stretch in the tube chamber of core pipe；Each plane nut rotation is arranged in core pipe tube chamber；Each plane nut includes engaging the flat thread portion of adaptation with the threaded portion that drives of paw in corresponding a set of paw assembly；Current transformer includes annular matrix, and clamp hole is arranged in the vestibule of annular matrix；Each plane nut drives its flat thread portion reciprocating rotation, so drive paw in corresponding a set of paw assembly towards core tube hub closer or far from, thus unclamping or clamping the electric power cable being arranged in clamp hole.
2. overhead transmission line connecting clip according to claim 1, it is characterised in that: the periphery wall of plane nut and core inside pipe wall slide adjacent；Plane nut center is provided with fastening part；Fastening part is regular polygon fastener hole or regular polygon binding groove；Crimp is identical with the quantity of paw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098632.5A CN105761893A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098632.5A CN105761893A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105761893A true CN105761893A (en) | 2016-07-13 |
Family
ID=56330233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610098632.5A Withdrawn CN105761893A (en) | 2016-01-15 | 2016-01-15 | Zero-sequence current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105761893A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448999A (en) * | 2016-09-29 | 2017-02-22 | 湖北大二互科技股份有限公司 | Novel Rogowski coil with no positional deviation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917711U (en) * | 2012-11-13 | 2013-05-01 | 北京振兴计量测试研究所 | Fastening fixture for tail cover of electric connector |
| CN203679326U (en) * | 2014-01-24 | 2014-07-02 | 华南理工大学 | Novel flexible four-jaw chuck |
| CN204276947U (en) * | 2014-12-01 | 2015-04-22 | 温岭市深澳机床厂(普通合伙) | Scroll chuck |
-
2016
- 2016-01-15 CN CN201610098632.5A patent/CN105761893A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917711U (en) * | 2012-11-13 | 2013-05-01 | 北京振兴计量测试研究所 | Fastening fixture for tail cover of electric connector |
| CN203679326U (en) * | 2014-01-24 | 2014-07-02 | 华南理工大学 | Novel flexible four-jaw chuck |
| CN204276947U (en) * | 2014-12-01 | 2015-04-22 | 温岭市深澳机床厂(普通合伙) | Scroll chuck |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448999A (en) * | 2016-09-29 | 2017-02-22 | 湖北大二互科技股份有限公司 | Novel Rogowski coil with no positional deviation |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160713 |
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| WW01 | Invention patent application withdrawn after publication |