CN105742023A - High-voltage and zero-sequence current transformer with relatively good anti-looseness performance - Google Patents
High-voltage and zero-sequence current transformer with relatively good anti-looseness performance Download PDFInfo
- Publication number
- CN105742023A CN105742023A CN201610097587.1A CN201610097587A CN105742023A CN 105742023 A CN105742023 A CN 105742023A CN 201610097587 A CN201610097587 A CN 201610097587A CN 105742023 A CN105742023 A CN 105742023A
- Authority
- CN
- China
- Prior art keywords
- slip pipe
- current transformer
- paw
- matrix
- pipe
- 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- Withdrawn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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a high-voltage and zero-sequence current transformer with relatively good anti-looseness performance. The high-voltage and zero-sequence current transformer comprises a base body, a flat nut, an axial retainer ring, press claws, a core rod and a current transformer body, wherein the base body is provided with a slide tube, radial guide limiting holes, a stopping table and an annular clamping groove; each press claw is provided with a press plate part, a guide slide block part and a drive thread part; each guide slide block part is formed by extending along the radial direction of the slide tube of the base body; each drive thread part is arranged on the corresponding guide slide block part; each drive thread part is arranged at one side end, adjacent to the flat nut, of the corresponding guide slide block part; the flat nut is rotationally arranged on the outer circumference wall of the slide tube of the base body and is provided with a flat thread part; the core rod is located in a tube cavity of the slide tube of the base body; arc-shaped clamping grooves are formed in the core rod; each arc-shaped clamping groove and one corresponding arc-shaped groove are clamped to form one wire clamping hole; the current transformer body comprises an installation pipe and an annular transformer main body; the annular transformer main body sleeves the installation pipe; the flat nut drives the flat thread part thereof to rotate in a reciprocating manner, so that the press claws are driven to be close to one another towards the center of the slide tube or far away from one another. The high-voltage and zero-sequence current transformer has a relatively good anti-looseness 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 with better anti-loosening performance.
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, 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 with better anti-loosening performance, including matrix, plane nut, axial back-up ring, paw, plug summation current transformer；The radially-directed spacing hole that matrix is provided with slip pipe, be arranged on slip pipe, the gear platform being arranged on slip pipe periphery wall and the annular slot being arranged on slip pipe periphery wall；Each radially-directed spacing hole includes guiding slide opening and the anticreep slide opening of connection, and guiding slide opening is arranged on matrix slip pipe and forms a breach away from the edge of a side of axial back-up ring；Each paw is provided with pressing plate portion, radially extend formation along matrix slip pipe guide runner portion and the driving threaded portion being arranged in guide runner portion；Threaded portion is driven to be arranged on a side of guide runner portion adjacent flat nut；Each paw guide runner portion is provided with the guide part in guiding slide opening, is arranged in the anti-delinking part of anticreep slide opening and is positioned at the limiting section outside matrix slip pipe；Axial back-up ring is fixed in the annular slot on matrix slip pipe periphery wall；Plane nut rotation is arranged on the periphery wall of matrix slip pipe, and at gear platform with axially between back-up ring；Plane nut adjoins a side of gear platform and is provided with the flat thread portion for driving threaded portion engagement adaptation with each paw；Plug is arranged in matrix slip pipe tube chamber；Along the central axial arc clip slot that is provided with of base tube on the periphery wall of plug, the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot, and each arc clip slot and a corresponding arcuate groove clamping form a clamp hole；Current transformer includes installing pipe and being set in the annular current transformer body installed on pipe；The side installing pipe is provided with axially projecting external screw thread union joint, and matrix slip pipe is provided with the female thread adaptive with external screw thread union joint away from the inwall of a side of gear platform；Pipe is installed be spirally connected by external screw thread union joint and matrix slip pipe；Plane nut drives its flat thread portion reciprocating rotation, so drive each paw close to each other towards slip pipe center or away from.
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.
Accompanying drawing explanation
The one that Fig. 1 is the present invention partly cuts open structural representation；
Fig. 2 is a kind of perspective view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 3 is a kind of front view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 4 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of high pressure zero sequence current mutual inductor with better anti-loosening performance, sees shown in Fig. 1 to Fig. 4, including matrix 1, plane nut 2, axial back-up ring 3, paw 4, plug 6 summation current transformer 8.
Matrix is provided with slip pipe 11, be arranged on slip pipe radially-directed spacing hole 12, the gear platform 13 formed along slip pipe radially evagination being arranged on slip pipe periphery wall and be arranged on slip pipe periphery wall along the slip pipe annular slot 14 that radially indent is formed；The quantity of radially-directed spacing hole and gear platform is all four, and gear platform is positioned at base shaft one end upwards, and axial back-up ring is positioned at the base shaft other end upwards；
The quantity of paw 4 is identical with the quantity of radially-directed spacing hole 12, is also four, and each paw is arranged in a corresponding radially-directed spacing hole 12, and each paw reciprocatingly slides along the radial direction of matrix slip pipe 11 under the guide and limit effect of radially-directed spacing hole；
Each paw is provided with pressing plate portion 41, radially extend formation along matrix slip pipe 11 guide runner portion 43 and the driving threaded portion 44 being arranged in guide runner portion；Threaded portion 44 is driven to be arranged on a side of guide runner portion adjacent flat nut；The inwall in pressing plate portion is curved, forms an arcuate groove 45.
Axial back-up ring 3 is fixed in the annular slot 14 on matrix slip pipe 11 periphery wall；
Plane nut 2 is ring-type, and plane nut sleeve is located on the periphery wall of matrix slip pipe 11, and at gear platform 13 with axially between back-up ring 3；The internal perisporium of plane nut is the smooth inner wall adaptive with matrix slip pipe periphery wall, the periphery wall of plane nut is provided with fastening part 21, plane nut adjoins a side of gear platform and is provided with flat thread portion 22, flat thread portion is provided with archimedean spiral groove, adaptation then engages with the driving threaded portion of paw in flat thread portion, and plane nut adjoins a side of axial back-up ring and slides adjacent with axial back-up ring；The fastening part 21 of the present embodiment midplane nut is provided in the multiple binding grooves on plane nut periphery wall, and the plurality of binding groove is evenly distributed on plane nut periphery wall.
In the present embodiment, each radially-directed spacing hole 12 includes guiding slide opening 121 and anticreep slide opening 122, and guiding slide opening is arranged on the matrix slip pipe edge away from a side of axial back-up ring, forms a breach, anticreep slide opening connects with guiding slide opening, and anticreep slide opening and guiding slide opening combination form T-shaped hole；
Each paw guide runner portion 43 is provided with the guide part 431 in guiding slide opening, is arranged in the anti-delinking part 432 of anticreep slide opening and is positioned at the limiting section 433 outside matrix slip pipe, and the cross sectional shape that the guide part 431 of each paw, anti-delinking part 432 and limiting section 433 combination are formed is I-shaped；The guide part 431 of each paw and anti-delinking part 432 are along each paw that extends radially through of matrix slip pipe, and the inwall in the inwall of guide part 431 of each paw, the inwall of anti-delinking part 432 and pressing plate portion 41 is coplanar；Driving threaded portion to be arranged on the side end wall of anti-delinking part adjacent flat nut, the shape of anti-delinking part and anticreep slide opening are adaptive；Drive threaded portion to protrude and be arranged on the side end wall of anti-delinking part adjacent flat nut so that drive threaded portion to cannot move in anticreep slide opening.
The present embodiment, when assembling, can first be located at plane nut sleeve on matrix slip pipe, and card connects axial back-up ring；Again along matrix slip pipe radially direction from outside to inside, the guide part of each paw and anti-delinking part are filled in a corresponding radially-directed spacing hole 12, the threaded portion that drives making paw is crimped on the periphery in plane nut flat thread portion, turn plane nut, can make each paw close to each other towards matrix slip pipe center.
Plug 6 is arranged in matrix slip pipe tube chamber；The periphery wall of plug 6 is provided with four arc clip slots 61 along base tube is central axial；Arcuate groove 45 on a corresponding paw inwall is just arranged by each arc clip slot, and each arc clip slot and a corresponding arcuate groove clamping form a clamp hole 5, so the present embodiment forms four clamp holes 5 altogether, can be used for simultaneously clamping on four cables；The periphery wall of plug is provided with four supports along matrix slip pipe radially protruding and positions flange 62, the internal perisporium of matrix slip pipe is provided with four positioning runners 15, each support location flange stretches in a corresponding positioning runner away from a side of plug, thus plug is positioned in the tube chamber of matrix slip pipe.
Current transformer is fixedly installed on matrix slip pipe, and is arranged concentrically with matrix slip pipe；Current transformer 8 includes installing pipe 81 and being set in the annular current transformer body 82 installed on pipe；The side installing pipe 81 is provided with axially projecting external screw thread union joint 811, and matrix slip pipe is provided with and the female thread 16 of external screw thread union joint 811 adaptation away from the inwall of a side of gear platform；Pipe is installed be spirally connected by external screw thread union joint and matrix slip pipe.
The present embodiment is provided with four clamp holes, but in use, only with wherein three phase cables of three clamp hole clampings, these three phase cables are carried out leakage current and detect in real time by Current Transformer 8, to find leak current fault in time.
The present embodiment, when carrying out clamp operation, adopts hook type spanner (also referred to as hook spanner) operation, and hook type spanner can drive plane nut around matrix slip pipe reciprocating rotation after catching on the binding groove on plane nut periphery wall；Plane nut is in reciprocating rotation, drive its flat thread portion reciprocating rotation, and then drive each paw by engaging the driving threaded portion of adaptation, owing to each paw radial direction only along matrix slip pipe under the guide and limit effect of radially-directed spacing hole 12 moves back and forth, so that the move mode of each paw be close to each other towards slip pipe center or away from, thus clamping or unclamp the electric power cable being arranged in clamp hole 5.
The present embodiment is by being arranged on cable clamping the centerline of matrix slip pipe, and its gravity centre distribution is relatively reasonable, when on the overhead power line of high-altitude, is 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.
The present embodiment can use as high pressure zero sequence current mutual inductor.
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 pressure zero sequence current mutual inductor with better anti-loosening performance, it is characterised in that: include matrix, plane nut, axial back-up ring, paw, plug summation current transformer；The radially-directed spacing hole that matrix is provided with slip pipe, be arranged on slip pipe, the gear platform being arranged on slip pipe periphery wall and the annular slot being arranged on slip pipe periphery wall；Each radially-directed spacing hole includes guiding slide opening and the anticreep slide opening of connection, and guiding slide opening is arranged on matrix slip pipe and forms a breach away from the edge of a side of axial back-up ring；Each paw is provided with pressing plate portion, radially extend formation along matrix slip pipe guide runner portion and the driving threaded portion being arranged in guide runner portion；Threaded portion is driven to be arranged on a side of guide runner portion adjacent flat nut；Each paw guide runner portion is provided with the guide part in guiding slide opening, is arranged in the anti-delinking part of anticreep slide opening and is positioned at the limiting section outside matrix slip pipe；Axial back-up ring is fixed in the annular slot on matrix slip pipe periphery wall；Plane nut rotation is arranged on the periphery wall of matrix slip pipe, and at gear platform with axially between back-up ring；Plane nut adjoins a side of gear platform and is provided with the flat thread portion for driving threaded portion engagement adaptation with each paw；Plug is arranged in matrix slip pipe tube chamber；Along the central axial arc clip slot that is provided with of base tube on the periphery wall of plug, the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot, and each arc clip slot and a corresponding arcuate groove clamping form a clamp hole；Current transformer includes installing pipe and being set in the annular current transformer body installed on pipe；The side installing pipe is provided with axially projecting external screw thread union joint, and matrix slip pipe is provided with the female thread adaptive with external screw thread union joint away from the inwall of a side of gear platform；Pipe is installed be spirally connected by external screw thread union joint and matrix slip pipe；Plane nut drives its flat thread portion reciprocating rotation, so drive each paw close to each other towards slip pipe center or away from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097587.1A CN105742023A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer with relatively good anti-looseness performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097587.1A CN105742023A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer with relatively good anti-looseness performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105742023A true CN105742023A (en) | 2016-07-06 |
Family
ID=56248211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610097587.1A Withdrawn CN105742023A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer with relatively good anti-looseness performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742023A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| 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 |
| CN204724882U (en) * | 2015-06-01 | 2015-10-28 | 冯炯培 | A kind of three-jaw clamping device |
-
2016
- 2016-01-15 CN CN201610097587.1A patent/CN105742023A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| 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 |
| CN204724882U (en) * | 2015-06-01 | 2015-10-28 | 冯炯培 | A kind of three-jaw clamping device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105742023A (en) | High-voltage and zero-sequence current transformer with relatively good anti-looseness performance | |
| CN105551750A (en) | High-voltage zero sequence current transformer having relatively high loosening prevention performance | |
| CN105761892A (en) | High-voltage zero sequence current transformer | |
| CN105609295A (en) | High-voltage zero-sequence current transformer with relatively good anti-looseness effect | |
| CN105551751A (en) | High-voltage zero sequence current transformer having relatively high loosening prevention performance | |
| CN105575593A (en) | High-voltage zero-sequence current transformer easy to install | |
| CN105575595A (en) | Zero-sequence current transformer | |
| CN105551758A (en) | Zero-sequence current transformer | |
| CN105551719A (en) | High-voltage zero-sequence current mutual inductor with relatively good anti-loosening property | |
| CN105742018A (en) | High-voltage and zero-sequence current transformer with relatively good wire clamping fastness | |
| CN105609291A (en) | Improved three-phase power zero-sequence current transformer | |
| CN105551745A (en) | Improved high-voltage current transformer | |
| CN105742014A (en) | Easy-to-install high-voltage zero-sequence current transformer | |
| CN105551744A (en) | Improved high-voltage current transformer | |
| CN105551743A (en) | Improved power zero-sequence current transformer | |
| CN105609292A (en) | Improved power zero-sequence current transformer | |
| CN105551746A (en) | Improved zero-sequence current transformer | |
| CN105575594A (en) | Easy-to-install high-voltage zero-sequence current transformer | |
| CN105679499A (en) | Zero-sequence current transformer with relatively high cable-clamping firmness | |
| CN105679501A (en) | Improved zero-sequence current transformer | |
| CN105609279A (en) | Easy-to-install high-voltage zero-sequence current transformer | |
| CN105551720A (en) | High-voltage zero-sequence current mutual inductor convenient for installation | |
| CN105609290A (en) | High-voltage zero-sequence current transformer | |
| CN105609238A (en) | Convenient-to-install high-voltage zero-sequence current transformer | |
| CN105551727A (en) | High-voltage zero-sequence current power transformer with relatively good wire clamping fastness |
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: 20160706 |
|
| WW01 | Invention patent application withdrawn after publication |