CN105551724A - High-voltage zero-sequence current transformer - Google Patents
High-voltage zero-sequence current transformer Download PDFInfo
- Publication number
- CN105551724A CN105551724A CN201610095974.1A CN201610095974A CN105551724A CN 105551724 A CN105551724 A CN 105551724A CN 201610095974 A CN201610095974 A CN 201610095974A CN 105551724 A CN105551724 A CN 105551724A
- Authority
- CN
- China
- Prior art keywords
- core pipe
- plate portion
- paw
- crimp
- top plate
- 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.)
- Withdrawn
Links
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
-
- 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
-
- 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
Abstract
The invention discloses a high-voltage zero-sequence current transformer, comprising a core tube, a set of pressing jaw assembly, a panel nut, a current transformer and three pressure welding elements; every pressure welding element is equipped with a pressing plate part and an anti-drop connecting part; every pressure welding element is detachably arranged on the core tube through the anti-drop connecting parts; the pressing plate parts are located at outer side of the core tube; three radial limiting slide holes are arranged on the tube wall of the core tube; the pressing jaw assembly comprises three pressing jaws; every pressing jaw comprises a top plate part, a guide slide block part and a drive thread part; every guide slide block part is inserted in one radial limiting slide hole; the drive thread parts stretch into the tube cavity of the core tube; the panel nut is rotationally arranged in the tube cavity of the core tube; the panel nut comprises a panel thread part; the current transformer comprises an annular base body; the annular base body is located at the outer sides of the pressure welding elements; the panel nut drives the pressing jaws to be close to or be away from the center of the core tube. The zero-sequence current power transformer has excellent anti-loose effect.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of high pressure zero sequence current mutual inductor.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the algebraical sum flowing into the telegram in reply stream of any node in circuit equals zero.Under circuit and the normal situation of electric equipment, the vector of each phase current equals zero, and therefore, the secondary side winding no signal of zero sequence current mutual inductor exports, and executive component is failure to actuate.The vector of each phase current when there is electric shock or leak current fault is non-vanishing, and fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and the electric current that zero sequence current mutual inductor produces 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 generally needs to reserve, therefore makes its application be subject to more restriction.
Summary of the invention
The object of this invention is to provide and be a kind ofly convenient to that location is installed, there is better firmness, effectively prevent the high pressure zero sequence current mutual inductor that loosens.
The technical scheme realizing the object of the invention is: a kind of high pressure zero sequence current mutual inductor, comprises a core pipe, a set of paw assembly, plane nut, a current transformer and three crimps; 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; The tube wall of core pipe is provided with three spacing slide openings of radial direction; Paw assembly comprises for being combined to form three paws in three clamp holes with crimp; Each paw comprises top plate portion, from the inwall of top plate portion to the guide runner portion of projecting inward formation 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 one for clamping the clamp hole of 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; Plane nut rotation is arranged in core pipe tube chamber; Plane nut comprises and to drive with paw threaded portion to engage adaptive flat thread portion; Current transformer comprises annular matrix, and annular matrix is positioned at the outside of crimp; The internal perisporium of core pipe is provided with the annular gear platform to projecting inward formation; Plane nut drives between threaded portion and core pipe gear platform at paw; The side that plane nut adjoins paw assembly arranges flat thread portion, and another side of plane nut and core pipe gear platform slide adjacent; The outer wall of paw top plate portion is provided with arc clip slot; The inwall in pressing plate portion is provided with deep-slotted chip breaker; The arc clip slot of paw top plate portion is just arranged the deep-slotted chip breaker in a corresponding crimp pressing plate portion, and this arc clip slot and this deep-slotted chip breaker clamping form a clamp hole; Plane nut drives its flat thread portion reciprocating rotation, so drive paw in paw assembly towards core tube hub near or away from, thus unclamp or clamp the electric power cable being arranged in clamp hole.
The present invention has positive effect: (1) the present invention compares with by traditional bolt assembly clamping electric power cable, can apply larger pressure, and have excellent anti-loosening effect, effectively ensure the reliability of long-term work.(2) zero sequence current mutual inductor of the present invention is owing to carrying press claw type retaining mechanism, does not need reserved installation position, is easy to install, and has good anti-loosening effect, and firm intensity is higher and reliable and stable.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the present invention;
Fig. 2 is for zero sequence current mutual inductor shown in Fig. 1 is from a kind of perspective view during another angle views;
A kind of front view that Fig. 3 is zero sequence current mutual inductor shown in Fig. 1;
Fig. 4 partly cuts open structural representation for the one of zero sequence current mutual inductor shown in Fig. 1;
Fig. 5 is a kind of perspective view when zero sequence current mutual inductor shown in Fig. 1 removes current transformer;
Fig. 6 is for the zero sequence current mutual inductor of part shown in Fig. 5 is from a kind of perspective view during another angle views;
Fig. 7 is a kind of front view of the zero sequence current mutual inductor of part shown in Fig. 5;
Fig. 8 partly cuts open structural representation for the one of the zero sequence current mutual inductor of part shown in Fig. 5;
Fig. 9 is a kind of explosive view of the zero sequence current mutual inductor of part shown in Fig. 5;
Figure 10 is for the zero sequence current mutual inductor of part shown in Fig. 5 is from a kind of explosive view during another angle views.
Embodiment
(embodiment 1)
The present embodiment is a kind of power circuit connecting clip, sees shown in Fig. 1 to Fig. 6, comprises a core pipe 2, a set of paw assembly 3, plane nut 4, current transformer 8 and three crimps 1.
The tube wall of core pipe is provided with three spacing slide openings 22 of radial direction, and the spacing slide opening of each radial direction all runs through core tube wall along the radial direction of core pipe; The spacing slide opening of each radial direction is positioned at core tubular axis middle part upwards, and the radial cross-sectional shape of each radial spacing hole is I-shaped; The internal perisporium of core pipe is provided with the annular gear platform 23 to projecting inward formation.
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 axially extends along core pipe, and the inwall in pressing plate portion is provided with deep-slotted chip breaker 13, and the periphery wall in pressing plate portion is circular arc; Anticreep connecting portion is that the radial cross-sectional shape of each post plate is L shape from pressing plate portion two side ends inwardly outstanding two the post plates formed; In the present embodiment, two L shape post plates are oppositely arranged;
The periphery wall of core pipe is provided with vertically three for installing the anticreep chute 24 of location crimp; Each anticreep chute comprises the mounting groove 241 that two radial sections are L shapes; In the present embodiment, two adjacent anticreep chutes are oppositely arranged; Each mounting groove and corresponding post plate adaptation; 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 make the anticreep connecting portion of crimp can not shift out along core caliber to from anticreep chute; In concrete practice, also can select the mode of clamping that fixing crimp is installed; Three draw-in grooves are such as set on the periphery wall of core pipe, each pressing plate arranges inwardly outstanding clamping support column or clamping supporting bracket, each clamping support column or clamping supporting bracket are directly snapped in a corresponding draw-in groove, also can prevent shackle member from shifting out core pipe along core pipe radial direction, this structure is also feasible.
The spacing slide opening of each radial direction is just arranged the inwall of a corresponding crimp.
Paw assembly comprises for being combined to form three paws 5 in clamp hole with crimp; Each paw comprises top plate portion 51, from the inwall of top plate portion to the guide runner portion 52 of projecting inward formation and the driving threaded portion 53 that is arranged on guide runner portion; Top plate portion axially extends along core pipe, and guide runner portion is along core caliber to extension; The outer wall of each paw top plate portion is provided with arc clip slot 511; Each paw top plate portion is positioned at outside core pipe, and just arranges the pressing plate portion of a corresponding crimp; Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, and each threaded portion that drives stretches in the tube chamber of core pipe; Each paw reciprocatingly slides along the radial direction of core pipe under the guide and limit effect of the spacing slide opening of radial direction; The radial cross-sectional shape in each guide runner portion is I-shaped with radial spacing hole adaptation.
The arc clip slot of each paw top plate portion is just arranged the deep-slotted chip breaker in a corresponding crimp pressing plate portion, and this arc clip slot and this deep-slotted chip breaker clamping form a clamp hole 6, and each clamp hole is for clamping an electric power cable.The present embodiment forms three clamp holes altogether, for clamping three electric power cables.In concrete practice, the size of each crimp can be different, and such as, distance between the deep-slotted chip breaker in each pressing plate portion and core tube wall is different, thus can form the clamp hole varied in size, for clamping the cable of different thicknesses.
Plane nut is arranged in core pipe tube chamber, and between the driving threaded portion of each paw and core pipe gear platform; Plane nut comprises and to drive with each paw threaded portion to engage adaptive flat thread portion 41 and be positioned at the fastening part 42 of plane nut center, the side that plane nut adjoins paw assembly arranges flat thread portion, and another side of plane nut and core pipe gear platform slide adjacent; The periphery wall of plane nut and core inside pipe wall slide adjacent; Flat thread portion is annular, and flat thread portion is provided with archimedean spiral groove, and the driving threaded portion of paw assembly is provided with and the thread groove of this archimedean spiral groove adaptation, each side driving threaded portion to be arranged on guide runner portion, place adjacent flat nut.
The fastening part of the present embodiment midplane 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, and such as square or in-line or quincunx, all can select.
Current transformer 8 comprises annular matrix 81 and intelligent control module 82, intelligent control module can comprise wireless transmit/receive units, when there being leakage current in three electric power cables, 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 with one heart, and annular matrix is positioned at the outside of crimp; Intelligent control module is arranged on and is enclosed in the region that formed by annular matrix inwall, core tube wall and crimp outer wall, thus makes full use of space, is conducive to overall small-sized and integrated.
Plane nut is in reciprocating rotation, drive its flat thread portion reciprocating rotation, and then drive each paw by the driving threaded portion of engaging adaptation with it, because each paw can only move back and forth along the radial direction of core pipe under the guide and limit effect of the spacing slide opening of radial direction, thus make the move mode of each paw be close to each other towards core tube hub or away from, thus unclamp or clamp the electric power cable being arranged in each clamp hole.
When the present embodiment is on the overhead power line of high-altitude, be conducive to alleviating vibration; In addition, the present embodiment drives paw clamping electric power cable by flat thread portion, compares with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, effectively ensures the reliability of long-term work.The present embodiment is be arranged on core pipe by sliding or crimping mode due to crimp, first cable can be 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 to clamp the easy to operation of electric power cable.
The present embodiment entirety can use as high pressure zero sequence current mutual inductor, for detecting the existence of leakage current, and Timeliness coverage leak current fault.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, 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 exhaustive without the need to also giving all execution modes.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (1)
1. a high pressure zero sequence current mutual inductor, is characterized in that: comprise a core pipe, a set of paw assembly, plane nut, a current transformer and three crimps; 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; The tube wall of core pipe is provided with three spacing slide openings of radial direction; Paw assembly comprises for being combined to form three paws in three clamp holes with crimp; Each paw comprises top plate portion, from the inwall of top plate portion to the guide runner portion of projecting inward formation 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 one for clamping the clamp hole of 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; Plane nut rotation is arranged in core pipe tube chamber; Plane nut comprises and to drive with paw threaded portion to engage adaptive flat thread portion; Current transformer comprises annular matrix, and annular matrix is positioned at the outside of crimp; The internal perisporium of core pipe is provided with the annular gear platform to projecting inward formation; Plane nut drives between threaded portion and core pipe gear platform at paw; The side that plane nut adjoins paw assembly arranges flat thread portion, and another side of plane nut and core pipe gear platform slide adjacent; The outer wall of paw top plate portion is provided with arc clip slot; The inwall in pressing plate portion is provided with deep-slotted chip breaker; The arc clip slot of paw top plate portion is just arranged the deep-slotted chip breaker in a corresponding crimp pressing plate portion, and this arc clip slot and this deep-slotted chip breaker clamping form a clamp hole; Plane nut drives its flat thread portion reciprocating rotation, so drive paw in paw assembly towards core tube hub near or away from, thus unclamp or clamp the electric power cable being arranged in clamp hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095974.1A CN105551724A (en) | 2016-01-15 | 2016-01-15 | High-voltage zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095974.1A CN105551724A (en) | 2016-01-15 | 2016-01-15 | High-voltage zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105551724A true CN105551724A (en) | 2016-05-04 |
Family
ID=55830854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610095974.1A Withdrawn CN105551724A (en) | 2016-01-15 | 2016-01-15 | High-voltage zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105551724A (en) |
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 CN201610095974.1A patent/CN105551724A/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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160504 |
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| WW01 | Invention patent application withdrawn after publication |