CN105590724A - Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening - Google Patents
Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening Download PDFInfo
- Publication number
- CN105590724A CN105590724A CN201610094370.5A CN201610094370A CN105590724A CN 105590724 A CN105590724 A CN 105590724A CN 201610094370 A CN201610094370 A CN 201610094370A CN 105590724 A CN105590724 A CN 105590724A
- Authority
- CN
- China
- Prior art keywords
- press
- core
- core pipe
- paw
- mutual inductor
- 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- Withdrawn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
- 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
- H01F38/38—Instruments transformers for polyphase ac
-
- 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 three-phase power zero sequence current mutual inductor capable of preventing cables from loosening. The three-phase power zero sequence current mutual inductor comprises a press ring, a core pipe, a mandril, a current mutual inductor body and two press claw assemblies. Two sets of guide holes are formed in the pipe wall of the core pipe side by side. Each set of guide holes comprises three radial guide holes. Each press claw assembly comprises three press claws. Each press claw is provided with a press plate part, a guide sliding block part and a transmission plate part. All the press plate parts are located in a pipe cavity of the core pipe. The press ring is rotationally arranged on the peripheral wall of the core pipe, the two side ends of the press ring are each provided with three spiral grooves, and the three spiral grooves in each side end are matched with three corresponding transmission plate parts respectively. The mandril is located in the pipe cavity of the core pipe. The mandril and the press claw assemblies are assembled to form three cable clamping holes. The current mutual inductor body comprises an annular substrate, and the cable clamping holes are formed in a hole cavity of the annular substrate. When the press ring rotates, the transmission plate part of one corresponding press claw is pushed through the spiral grooves, and then the press claws in the two press claw assemblies are pushed synchronously to slide towards the center of the core pipe. The three-phase power zero sequence current mutual inductor is compact and reasonable.
Description
Technical field
The invention belongs to power technology field, be specifically related to a kind of three-phase power zero sequence current mutual inductance that prevents that cable is looseningDevice.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the telegram in reply that flows into arbitrary node in circuitThe algebraical sum of stream equals zero. In circuit and the normal situation of electrical equipment, the vector of each phase current equals zero, therefore, and zeroThe secondary side winding no signal output of order current transformer, executive component is failure to actuate. When occurring to get an electric shock or each when leak current faultThe vector of phase current is non-vanishing, and fault current makes to produce magnetic flux, zero sequence current mutual inductor in the iron core of zero sequence current mutual inductorThe electric current producing is zero-sequence current. When protection mechanism receives this zero sequence current signal, can take according to electrical leakage quantity correspondingProtection action.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix,Its installation site generally needs reserved, therefore make the application of zero sequence current mutual inductor be subject to more restriction.
Summary of the invention
The object of this invention is to provide be a kind ofly convenient to that location is installed, have better firmly degree prevent cable loosening threePhase electric power zero sequence current mutual inductor.
The technical scheme that realizes the object of the invention is: a kind of three-phase power zero sequence current mutual inductor that prevents that cable is loosening,Comprise a pressure ring, core pipe, plug, current transformer and two casing pressure claw assemblies; On core tube wall, establish side by sideThere are two groups of pilot holes, respectively organize pilot hole and a set of paw assembly adaptation; Each group pilot hole comprises three radially-directed holes; Each casing pressureClaw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and transmission board; Each pressing plate portion is positioned at core pipe pipeIn chamber; Core tube wall is stretched out in the outer end of the guide runner portion of paw, and each driver plate portion is positioned at core tube wall outside; Each paw is along phaseAnswer a radially-directed hole to reciprocatingly slide; Pressure ring rotates and is arranged on the periphery wall of core pipe, and the two side ends of pressure ring is respectively provided with threeHelicla flute, three helicla flutes of each side respectively with corresponding a set of paw assembly in three transmission board adaptations; Each pawDriver plate portion is arranged in a corresponding helicla flute; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc foldersGroove, each arc clip slot extends axially along core pipe, and each arc clip slot is just to the deep-slotted chip breaker setting on a corresponding paw inwall; Each arcClevis groove and a corresponding deep-slotted chip breaker clamping form a clamp hole; Plug and each casing pressure claw assembly are combined to form three clampsHole; Current transformer comprises annular matrix, and clamp hole is arranged in annular matrix vestibule; The internal perisporium of each pressure ring is and core pipe peripheryThe smooth inner wall of wall slip adjacency; The periphery wall of each pressure ring is provided with multiple binding grooves; The two side ends of each pressure ring and each cover pawGuide runner portion slip adjacency in assembly; Three radially-directed holes in each group pilot hole are circumferentially evenly distributed on core along core pipeOn tube wall, each radially-directed hole is along core caliber to running through core tube wall; Each radially-directed hole forms one and is positioned at core tube edges placeBreach; Pressure ring pushes the transmission board of a corresponding paw by each helicla flute while rotation, and then synchronously promotes two cover pawsPaw in assembly slides towards core tube hub.
The present invention has positive effect: (1) three-phase power zero sequence current mutual inductor of the present invention is owing to carrying press claw typeRetaining mechanism, does not need reserved installation position, is easy to install. (2) the present invention adopts two casing pressure claw assemblies to be clamped on same cable,There is the effect of dual fail-safe, in use go wrong even wherein a set of, also have its service behaviour of another set of guarantee. (3) originallyInvention drives paw to clamp electric power cable by helicla flute, clamps electric power cable compare with the bolt assembly by traditional, hasExcellent anti-loosening effect, effectively ensures the reliability of long-term work.
Brief description of the drawings
Fig. 1 is that the one of the first structure of the present invention is partly cutd open structural representation;
Fig. 2 is that three-phase power zero sequence current mutual inductor shown in Fig. 1 removes a kind of stereochemical structure signal after current transformerFigure;
Fig. 3 is a kind of front view of three-phase power zero sequence current mutual inductor shown in Fig. 1;
Fig. 4 is that the one of three-phase power zero sequence current mutual inductor shown in Fig. 1 is partly cutd open structural representation;
Fig. 5 is a kind of explosive view of three-phase power zero sequence current mutual inductor shown in Fig. 1;
Fig. 6 is that three-phase power zero sequence current mutual inductor shown in Fig. 1 removes a kind of explosive view after pressure ring.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of three-phase power zero sequence current mutual inductor, sees shown in Fig. 1 to Fig. 5, comprises a pressure ring 1,Individual core pipe 2, plug 7, current transformer 8 and two casing pressure claw assemblies 3.
In the present embodiment, pressure ring 1, core pipe 2, plug 7 and two casing pressure claw assemblies 3 all adopt insulating materials to make.
On core tube wall, be provided with side by side vertically two groups of pilot holes, respectively organize pilot hole and a set of paw assembly adaptation; Each groupPilot hole comprises three radially-directed holes 23, and these three radially-directed holes are circumferentially evenly distributed on core tube wall along core pipe; ThisIn embodiment, each radially-directed hole is along core caliber to running through core tube wall.
Each radially-directed hole 23 comprises the guiding slide opening 231 and the anticreep slide opening 232 that axially set gradually along core pipe; Guiding is slidingHole is arranged on the edge of core pipe two side ends, and anticreep slide opening and guiding slide opening are communicated with; The radial section shape in each radially-directed holeIt is T font; Each radially-directed hole 23 forms a breach that is positioned at core tube edges place.
Each casing pressure claw assembly includes three paws 5; Each paw is provided with pressing plate portion 51, sliding to the guiding of extending along core caliberPiece portion 52 and be arranged on the transmission board 53 in guide runner portion; The transmission board of each paw is arranged on each guide runner portionOn along axially outstanding flange of core pipe, the outboard end of this flange is provided with chisel teeth 54.
Each pressing plate portion is all arranged in core pipe tube chamber, and core tube wall is stretched out in the outer end of the guide runner portion of each paw, each transmissionBoard is positioned at core tube wall outside; Each guide runner portion 52 comprises guide part 521 and anti-delinking part 522, and guide part is positioned at corresponding oneIn the guiding slide opening in individual radially-directed hole, anti-delinking part is arranged in the anticreep slide opening in a corresponding radially-directed hole; Guide part and anti-The radial section shape of de-portion is and the T font of radially-directed hole adaptation. Each paw is done the spacing of radially-directed hole and guidingWith under, along core caliber to reciprocatingly sliding; The inwall of each pressing plate portion is provided with deep-slotted chip breaker 55.
Pressure ring 1 rotates and is arranged on the periphery wall of core pipe; The internal perisporium of pressure ring is and the light of core pipe periphery wall slip adjacencySliding inwall; The periphery wall of pressure ring is provided with multiple binding grooves 11; In the present embodiment, on the two side ends end wall of paw, be respectively provided with threeHelicla flute 12, three helicla flutes of each side respectively with corresponding a set of paw assembly in three transmission board adaptations;
In the present embodiment, each helicla flute comprises the anticreep district 121 that is communicated with pressure ring vestibule 13 and away from pressure ring vestibuleAccommodating area 122; The diapire in anticreep district is provided with multiple wedge shape anticreep teeth 123, the chisel teeth adaptation of each wedge shape anticreep tooth and paw;Accommodating area is smooth chute; The present embodiment is in the time of operation, and the binding groove that adopts hook type spanner to catch on pressure ring is twisted pressure ring.
Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots 71, and each arc clip slot is along core pipeExtend axially, each arc clip slot is just to the deep-slotted chip breaker setting on a corresponding paw inwall; Each arc clip slot and a corresponding arcThe clamping of shape groove forms a clamp hole 61; So the present embodiment can form three clamp holes, can be used for clamping three cables simultaneously.
The periphery wall of plug is provided with four supporting and location flanges 72 that protrude along core pipe radial direction, the internal perisporium of core pipeBe provided with four positioning runners 24, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thereby coreRod is positioned in the tube chamber of core pipe.
The present embodiment, in order to promote chuck strength, is also provided with multiple punctures 6 in each deep-slotted chip breaker and arc clip slot; Concrete nextSay, each puncture is along the radially protrusion of core pipe portion.
In the present embodiment, each paw is the integral piece of making by injection mo(u)lding, and each puncture is made in the time of injection mo(u)lding; ?In concrete practice, puncture also can adopt alternate manner to make; For example in each deep-slotted chip breaker, be provided with multiple installation draw-in grooves, then adoptingThe puncture sheet made from insulating materials is inlaid in corresponding one and installs in draw-in groove; Puncture sheet comprises installation portion and thorn blade, installsPortion is inlaid in installs in draw-in groove, and thorn blade exposes installing card groove and forms puncture. In concrete practice, can also adopt respectivelyThe mode of screw thread is set in arc clip slot and deep-slotted chip breaker, also can improving clamping sigma compactness energy.
Current transformer comprises annular matrix 81 and intelligent control module; In the present embodiment, this current transformer is sheathed solidFix on the periphery wall of core pipe. Intelligent control module can comprise wireless transmit/receive units, and intelligent control module passes through wireless receiving and dispatchingThe zero sequence current signal that unit senses annular matrix sends distance host to, to realize accurate long-range no worker monitor; ThisPlant structure and can make full use of space, be conducive to the small-sized and integrated of entirety.
In concrete practice, this current transformer also can be fixed on other position, as long as make clamp hole be positioned at annularIn matrix vestibule, be all feasible.
The driver plate portion of each paw is arranged in a corresponding helicla flute; Each helicla flute, along with pressure ring synchronously rotates, makes phaseAnswer a transmission board from being positioned at accommodating area to being positioned at anticreep district, also this transmission board is produced to pushing effect; The present embodimentIn, pressure ring synchronously drives the paw in two casing pressure claw assemblies, make pressing plate portion in each casing pressure claw assembly towards core tube hub thatThis is close, thereby clamps the electric power cable that is arranged in clamp hole.
In the time that the chisel teeth of each pressing plate portion is clamped on the wedge shape anticreep tooth in corresponding anticreep district, wedge shape anticreep tooth prevents from pressingRing reversing, thus make the present embodiment there is good anti-loosening effect.
The present embodiment is by clamping cable at the longitudinal center line place that is arranged on zero sequence current mutual inductor, and its gravity centre distributionFor rationally, on for high-altitude overhead power line time, be conducive to alleviate vibration; In addition, the present embodiment is anti-by having wedge shapeThe slope groove of de-tooth positions each paw, and can play and prevent the technique effect that falls back, and by traditional bolt assemblyClamping electric power cable is compared, particularly excellent in anti-loosening effect, effectively ensures the reliability of long-term work.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not rightThe restriction of embodiments of the present invention. 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 theseBelong to apparent variation or the variation that connotation of the present invention extends out and still belong to protection scope of the present invention.
Claims (1)
1. prevent the three-phase power zero sequence current mutual inductor that cable is loosening, it is characterized in that: comprise a pressure ring, a corePipe, plug, current transformer and two casing pressure claw assemblies; On core tube wall, be provided with side by side two groups of pilot holes, lead for each groupTo hole and a set of paw assembly adaptation; Each group pilot hole comprises three radially-directed holes; Each casing pressure claw assembly comprises three paws;Each paw is provided with pressing plate portion, guide runner portion and transmission board; Each pressing plate portion is arranged in core pipe tube chamber; The guide runner of pawCore tube wall is stretched out in the outer end of portion, and each driver plate portion is positioned at core tube wall outside; Each paw is past along a corresponding radially-directed holeMultiple slip; Pressure ring rotates and is arranged on the periphery wall of core pipe, and the two side ends of pressure ring is respectively provided with three helicla flutes, three of each sideHelicla flute respectively with corresponding a set of paw assembly in three transmission board adaptations; The driver plate portion of each paw is positioned at corresponding oneIn helicla flute; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot is along core tubular axisTo extension, each arc clip slot is just to the deep-slotted chip breaker setting on a corresponding paw inwall; Each arc clip slot and a corresponding arcGroove clamping forms a clamp hole; Plug and each casing pressure claw assembly are combined to form three clamp holes; Current transformer comprises annularMatrix, clamp hole is arranged in annular matrix vestibule; The internal perisporium of each pressure ring is and the smooth inner wall of core pipe periphery wall slip adjacency;The periphery wall of each pressure ring is provided with multiple binding grooves; Guide runner portion in the two side ends of each pressure ring and each casing pressure claw assembly slidesAdjacency; Three radially-directed holes in each group pilot hole are circumferentially evenly distributed on core tube wall along core pipe, each radially-directed holeAlong core caliber to running through core tube wall; Each radially-directed hole formation one is positioned at the breach at core tube edges place; Pressure ring passes through while rotationEach helicla flute pushes the transmission board of a corresponding paw, and then synchronously promotes paw in two casing pressure claw assemblies in core pipeThe heart slides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094370.5A CN105590724A (en) | 2016-01-15 | 2016-01-15 | Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094370.5A CN105590724A (en) | 2016-01-15 | 2016-01-15 | Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105590724A true CN105590724A (en) | 2016-05-18 |
Family
ID=55930222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610094370.5A Withdrawn CN105590724A (en) | 2016-01-15 | 2016-01-15 | Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105590724A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| JP2014080998A (en) * | 2012-10-15 | 2014-05-08 | Sanwa Tekki Corp | Pipe fixing device |
| 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 CN201610094370.5A patent/CN105590724A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| JP2014080998A (en) * | 2012-10-15 | 2014-05-08 | Sanwa Tekki Corp | Pipe fixing device |
| 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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| 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: 20160518 |
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| WW01 | Invention patent application withdrawn after publication |