CN105655118A - Intelligent zero sequence current transformer - Google Patents
Intelligent zero sequence current transformer Download PDFInfo
- Publication number
- CN105655118A CN105655118A CN201610098539.4A CN201610098539A CN105655118A CN 105655118 A CN105655118 A CN 105655118A CN 201610098539 A CN201610098539 A CN 201610098539A CN 105655118 A CN105655118 A CN 105655118A
- Authority
- CN
- China
- Prior art keywords
- core pipe
- plate portion
- paw
- current transformer
- crimp
- 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- Withdrawn
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Classifications
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses an intelligent zero sequence current transformer which comprises a core pipe, a current transformer body, two pressing claw assemblies, two planar nuts and six press-connecting pieces. Six radial limiting slide holes are formed in the pipe wall of the core pipe. Each press-connecting piece is provided with a pressing plate part and an anti-disengagement connecting part. Each press-connecting piece is detachably arranged on the core pipe through the corresponding anti-disengagement connecting part. Each pressing claw assembly comprises three pressing claws. Each pressing claw comprises a top plate part, a guide sliding block part and a drive thread part, wherein the guide sliding block part is inserted in the corresponding radial limiting slide hole in the core pipe, and the drive thread part extends in a pipe cavity of the core pipe. Each planar nut is arranged in the pipe cavity of the corresponding core pipe in a rotating mode, and comprises a planar thread part. The current transformer body comprises an annular base. Each planar nut drives the pressing claws in the corresponding pressing claw assembly to get close to or get away from the center of the core pipe. The intelligent zero sequence current transformer has the excellent anti-disengagement effect.
Description
Technical field
The invention belongs to power technology field, be specifically related to a kind of intelligent zero sequence current mutual inductor.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the telegram in reply stream that flows into arbitrary node in circuitAlgebraical sum equal zero. In circuit and the normal situation of electrical equipment, the vector of each phase current equals zero, therefore,The secondary side winding no signal output of zero sequence current mutual inductor, executive component is failure to actuate. In the time there is electric shock or leak current faultThe vector of each phase current non-vanishing, fault current makes to produce magnetic flux, zero-sequence current in the iron core of zero sequence current mutual inductorThe electric current that transformer produces is zero-sequence current. When protection mechanism receives this zero sequence current signal, can be according to electrical leakage quantityTake corresponding protection action.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, itsInstallation site generally needs reserved, therefore make 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 firmly degree, effectively prevent the intelligence become flexibleType zero sequence current mutual inductor.
The technical scheme that realizes the object of the invention is: a kind of intelligent zero sequence current mutual inductor tool, comprises a core pipe,Individual current transformer, two casing pressure claw assemblies, two plane nuts and six crimps; The tube wall of core pipe is provided with six footpathsTo spacing slide opening; Each crimp is provided with pressing plate portion and anticreep connecting portion; Each crimp is established by anticreep connecting portion is dismountablePut on core pipe, pressing plate portion is positioned at core pipe outside; Each casing pressure claw assembly comprises for being combined to form three clamps with crimpThree paws in hole; Each paw comprises top plate portion, guide runner portion from the inwall of top plate portion to projecting inward formation and setting fromDriving threaded portion in guide runner portion; Top plate portion is positioned at core pipe outside, the pressing plate of top plate portion and a corresponding crimpPortion's clamping forms one for clamping the clamp hole of electric power cable; Guide runner portion insert on core pipe corresponding one radially spacingIn slide opening, drive threaded portion to stretch in the tube chamber of core pipe; Each plane nut rotation is arranged in core pipe tube chamber; Each planeNut comprises with the driving threaded portion of paw in corresponding a set of paw assembly and engages adaptive flat thread portion; Current transformerComprise annular matrix and intelligent control module, clamp hole is arranged in the vestibule of annular matrix; Radially spacing slide opening is positioned at core pipeMiddle part axially, radially the radial section shape of spacing hole is I-shaped, the radial section shape of guide runner portion be withRadially spacing hole adaptation is I-shaped; Top plate portion extends axially along core pipe, and pressing plate portion extends axially along core pipe; Outside core pipeOn perisporium, be provided with vertically the anticreep chute for location crimp is installed, anticreep chute comprises two mounting grooves; Anticreep connectsThe portion of connecing is from inwardly outstanding two post plates that form of pressing plate portion two side ends; Each post plate is arranged in a corresponding mounting groove; RespectivelyPlane nut drives its flat thread portion reciprocating rotation, and then drives paw in corresponding a set of paw assembly in core pipeThe heart near or away from, thereby unclamp or clamp the electric power cable that is arranged in clamp hole.
The present invention has positive effect: (1) zero sequence current mutual inductor of the present invention is owing to carrying press claw type retaining mechanism,Do not need reserved installation position, be easy to install, and have good anti-loosening effect, firmly intensity is higher and reliable and stable.(2) the present invention compares with the bolt assembly clamping electric power cable by traditional, can apply larger pressure, and have excellentDifferent anti-loosening effect, effectively ensures the reliability of long-term work. (3) the present invention adopts two casing pressure claw assemblies to clampOn same cable, there is the effect of dual fail-safe, in use go wrong even wherein a set of, also have another set of guaranteeIts service behaviour.
Brief description of the drawings
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 the one of zero sequence current mutual inductor shown in Fig. 1 is partly cutd open structural representation;
Fig. 4 is that zero sequence current mutual inductor shown in Fig. 1 removes a kind of perspective view after current transformer;
Fig. 5 is a kind of front view of zero sequence current mutual inductor shown in Fig. 4;
Fig. 6 is that the one of zero sequence current mutual inductor shown in Fig. 4 is partly cutd 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 intelligent zero sequence current mutual inductor, sees shown in Fig. 1 to Fig. 7, comprises a core pipe 2, twoCasing pressure claw assembly 3, two plane nuts 4, two cover crimp assemblies and current transformers 8.
The tube wall of core pipe is provided with six radially spacing slide openings 22, and each radially spacing slide opening all radially runs through core pipe along core pipeTube wall; Each radially spacing slide opening is positioned at core tubular axis middle part upwards, and each radially radial section shape of spacing hole is I-shaped;The internal perisporium of core pipe is provided with the annular gear platform 23 to projecting inward formation. In the present embodiment, six radially spacing hole be divided into twoGroup, in each group three radially spacing hole for and corresponding a set of paw assembly adaptation.
Each cover crimp assemblies is used for and corresponding a set of paw assembly adaptation, respectively overlaps crimp assemblies and includes three crimps 1;Each crimp is provided with pressing plate portion 11 and anticreep connecting portion 12; Crimp is by the dismountable core pipe that is arranged on of anticreep connecting portionOn; Pressing plate portion 11 extends axially along core pipe, and the inwall of pressing plate portion is provided with deep-slotted chip breaker 13, and the periphery wall of pressing plate portion is circular arcShape; Anticreep connecting portion is that each post plate extends axially along core pipe from inwardly outstanding two post plates that form of pressing plate portion two side ends,The radial section shape of each post plate is L shaped; In the present embodiment, two L shaped post plates are oppositely arranged;
On the periphery wall of core pipe, be provided with vertically three for the anticreep chute 24 of location crimp is installed; Each anticreep chute bagDrawing together two radial sections is L shaped mounting grooves 241; In the present embodiment, two adjacent anticreep chutes are oppositely arranged; RespectivelyMounting groove and a corresponding post plate adaptation; The side of the anticreep connecting portion of each crimp along core pipe axial direction from anticreep chuteEnd slips in a corresponding anticreep chute; In concrete practice, anticreep connecting portion can be selected other shape, as long as makeThe anticreep connecting portion that obtains crimp can not be along core caliber to shifting out from anticreep chute; In concrete practice, also optionalFixing crimp is installed by the mode of clamping; Multiple draw-in grooves are for example set on the periphery wall of core pipe, on each pressing plate, arrangeInwardly outstanding clamping support column or clamping gripper shoe, directly snaps in corresponding one by each clamping support column or clamping gripper shoeIn draw-in groove, also can prevent that shackle member from shifting out core pipe along core pipe radial direction, this structure is also feasible.
Each just inwall setting to a corresponding crimp of radially spacing slide opening.
In concrete practice, also two crimps along the axial adjacency of core pipe can be made of one to part, in the present embodimentTwo cover crimp assemblies just unite two into one and become a set of crimp assemblies.
Each casing pressure claw assembly comprises for being combined to form three paws 5 in clamp hole with crimp; Each paw comprises top plate portion51, the guide runner portion 52 from the inwall of top plate portion to projecting inward formation and be arranged on the driving screw thread guide runner portionPortion 53; Top plate portion extends axially along core pipe, and guide runner portion is along core caliber to extension; The outer wall of paw top plate portion is provided withArc clip slot 511; Each paw top plate portion is positioned at core pipe outside, and just the pressing plate portion of a corresponding crimp is being arranged; RespectivelyOn guide runner portion insertion core pipe, in a corresponding radially spacing slide opening, respectively drive threaded portion to stretch in the tube chamber of core pipe;Each paw is radially reciprocatingly sliding along core pipe under the guide and limit effect of spacing slide opening radially; Each guide runner portion radiallyCross sectional shape is I-shaped with spacing hole adaptation radially.
In the present embodiment, the arc clip slot of each paw is the deep-slotted chip breaker setting to a corresponding crimping boss just, and this pawThe deep-slotted chip breaker clamping of arc clip slot and this crimping boss forms a clamp hole 6, and each clamp hole is used for clamping a power lineCable; The present embodiment forms three clamp holes altogether, clamps altogether three electric power cables. Current transformer 8 comprises annular matrix 81With intelligent control module 82, intelligent control module can comprise wireless transmit/receive units, when there being electric leakage electricity in three electric power cablesWhen stream, annular matrix will induce secondary current, intelligent control module by wireless transmit/receive units this secondary current informationSend distance host to; Annular matrix and core pipe arrange with one heart, and annular matrix is positioned at the outside of crimp; Based Intelligent Control mouldPiece is arranged on by annular matrix inwall, core tube wall and crimp outer wall and encloses in the region forming, thereby makes full use of skyBetween, be 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 comprise withIn corresponding a set of paw assembly, the driving threaded portion of paw is engaged adaptive flat thread portion 41 and is arranged in plane nutThe fastening part 42 at heart place; Each plane nut arranges flat thread portion on a side of paw assembly, each plane nutAnother side and core pipe gear platform slip adjacency; The periphery wall of each plane nut and core inside pipe wall slip adjacency; Flat thread portionFor annular, flat thread portion is provided with archimedean spiral groove, and the driving threaded portion of paw assembly is provided with and this A Ji meterThe thread groove of moral helicla flute adaptation, respectively drives threaded portion to be arranged on a side of place guide runner portion 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 twists operationAdopt inner hexagon spanner; In concrete practice, described fastening part just can adopt other shape, for example square or in-line orQuincunx, all can select.
Current transformer 8 comprises annular matrix 81 and intelligent control module 82, and intelligent control module can comprise wireless receiptsBill unit, in the time having leakage current in three electric power cables, annular matrix will induce secondary current, intelligent control moduleBy wireless transmit/receive units, this secondary current information is sent to distance host; Annular matrix and core pipe arrange with one heart, annularMatrix is positioned at the outside of crimp; Intelligent control module is arranged on by annular matrix inwall, core tube wall and crimp outer wallEnclose in the region of formation, thereby make full use of space, be conducive to the small-sized and integrated of entirety.
Each plane nut, in reciprocating rotation, drives its flat thread portion reciprocating rotation, and then by engage adaptation with itDrive threaded portion to drive the paw in corresponding a set of paw assembly, because each paw is done at the guide and limit of spacing slide opening radiallyWith lower can only be along radially the moving back and forth of core pipe, thereby make the move mode of paw in corresponding a set of paw assembly be toCore tube hub close to each other or away from, thereby unclamp or clamp the electric power cable that is arranged in clamp hole.
When the present embodiment is used on the overhead power line of high-altitude, be conducive to alleviate vibration; In addition, the present embodiment passes through planeThreaded portion drives paw to clamp electric power cable, clamps electric power cable and compares, in anti-loosening effect with the bolt assembly by traditionalParticularly excellent on fruit, effectively ensure the reliability of long-term work. In addition, because crimp is by slipping or crimpingMode is arranged on core pipe, can first cable be placed in to the arc clip slot of each paw, more corresponding crimp is packed into phaseIn the anticreep chute of answering, corresponding electric power cable can be placed in to clamp hole; This structure makes to clamp electric power cableEasy to operation. Finally, the present invention, owing to having adopted two casing pressure claw assemblies for clamping electric power cable, also has two guarantorThe technique effect of danger.
The present embodiment entirety can be used as high pressure zero sequence current mutual inductor and uses, for detection of the existence of leakage current, in timeFind 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 to thisThe restriction of working of an invention mode. For those of ordinary skill in the field, also can on the basis of the above descriptionTo make other changes in different forms. Here without also giving exhaustive to all embodiments. And thisThe apparent variation that belongs to connotation of the present invention a bit and extended out or variation still belong to protection scope of the present invention.
Claims (1)
1. an intelligent zero sequence current mutual inductor tool, is characterized in that: comprise 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 radially spacing slide openings; RespectivelyCrimp is provided with pressing plate portion and anticreep connecting portion; Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, pressesBoard is positioned at core pipe outside; Each casing pressure claw assembly comprises for being combined to form three paws in three clamp holes with crimp;Each paw comprises top plate portion, guide runner portion from from the inwall of top plate portion to projecting inward formation and is arranged on guide runner portionDriving threaded portion; Top plate portion is positioned at core pipe outside, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms oneFor clamping the clamp hole of electric power cable; On guide runner portion insertion core pipe, in a corresponding radially spacing slide opening, drive spiral shellLine portion stretches in the tube chamber of core pipe; Each plane nut rotation is arranged in core pipe tube chamber; Each plane nut comprises with correspondingIn a set of paw assembly, adaptive flat thread portion is engaged in the driving threaded portion of paw; Current transformer comprise annular matrix andIntelligent control module, clamp hole is arranged in the vestibule of annular matrix; Radially spacing slide opening is positioned at core tubular axis middle part upwards,Radially the radial section shape of spacing hole is I-shaped, and the radial section shape of guide runner portion is and spacing hole adaptation radiallyI-shaped; Top plate portion extends axially along core pipe, and pressing plate portion extends axially along core pipe; On the periphery wall of core pipe, establish verticallyBe useful on the anticreep chute that location crimp is installed, anticreep chute comprises two mounting grooves; Anticreep connecting portion is from pressing plate portionTwo side ends is outstanding two post plates that form inwardly; Each post plate is arranged in a corresponding mounting groove; Each plane nut drives itFlat thread portion reciprocating rotation, so drive paw in corresponding a set of paw assembly towards core tube hub near or away from,Thereby unclamp or clamp the electric power cable that is arranged in clamp hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098539.4A CN105655118A (en) | 2016-01-15 | 2016-01-15 | Intelligent zero sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098539.4A CN105655118A (en) | 2016-01-15 | 2016-01-15 | Intelligent zero sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105655118A true CN105655118A (en) | 2016-06-08 |
Family
ID=56489853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610098539.4A Withdrawn CN105655118A (en) | 2016-01-15 | 2016-01-15 | Intelligent zero sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105655118A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN201629222U (en) * | 2010-03-03 | 2010-11-10 | 大连北方互感器集团有限公司 | Cable-fixed type current transformer |
| JP2011208778A (en) * | 2010-03-30 | 2011-10-20 | Sanwa Tekki Corp | Piping fixing device |
| CN103367959A (en) * | 2013-07-10 | 2013-10-23 | 平湖迪工机械制造有限公司 | Clamping device for cable-former |
| CN104653987A (en) * | 2013-11-22 | 2015-05-27 | 中国科学院沈阳自动化研究所 | Chuck type electronic frame |
-
2016
- 2016-01-15 CN CN201610098539.4A patent/CN105655118A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN201629222U (en) * | 2010-03-03 | 2010-11-10 | 大连北方互感器集团有限公司 | Cable-fixed type current transformer |
| JP2011208778A (en) * | 2010-03-30 | 2011-10-20 | Sanwa Tekki Corp | Piping fixing device |
| CN103367959A (en) * | 2013-07-10 | 2013-10-23 | 平湖迪工机械制造有限公司 | Clamping device for cable-former |
| CN104653987A (en) * | 2013-11-22 | 2015-05-27 | 中国科学院沈阳自动化研究所 | Chuck type electronic frame |
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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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160608 |