CN106057408A - Intelligent medium-high voltage zero-sequence current transformer - Google Patents
Intelligent medium-high voltage zero-sequence current transformer Download PDFInfo
- Publication number
- CN106057408A CN106057408A CN201610097571.0A CN201610097571A CN106057408A CN 106057408 A CN106057408 A CN 106057408A CN 201610097571 A CN201610097571 A CN 201610097571A CN 106057408 A CN106057408 A CN 106057408A
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- CN
- China
- Prior art keywords
- ring
- core pipe
- paw
- groove
- pressure ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- 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
- H02G7/04—Arrangements or devices for relieving mechanical tension
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses an intelligent medium-high voltage zero-sequence current transformer, which comprises a core tube, a core rod, a current transformer body, two compression rings and two sets of wire clamping components, wherein the core tube is provided with radial guide holes; the compression rings are rotationally arranged on the outer circumference wall of the core tube; each compression ring comprises a ratchet ring of which the inner circumference wall is provided with a plurality of slope grooves; a plurality of wedge-shaped anti-drop teeth are arranged in the slope grooves; each compression ring is matched with one set of wire clamping components; each set of wire clamping components comprise at least three press claws and reset springs; each press claw comprises a press plate part and a radial slide column; wedge-shaped teeth are arranged in the radial slide columns; the press plate parts are located in a tube cavity of the core tube; each radial slide column passes through one radial guide hole; each wedge-shaped tooth abuts on the wedge-shaped anti-drop tooth in one corresponding slope groove; the core rod is located in the tube cavity of the core tube; at least three wire clamping holes are formed by clamping in all; the current transformer body comprises an annular base body; the wire clamping holes are located in a hole cavity of the annular base body; and each ratchet ring synchronously drives the press plate parts in one set of corresponding wire clamping components to move towards the center of the core tube when rotating. The intelligent medium-high voltage zero-sequence current transformer has relatively good electrical properties.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of intelligent mesohigh zero sequence current mutual inductor.
Background technology
The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the telegram in reply of any node in circuit
The algebraical sum of stream is equal to zero.In the case of circuit and electrical equipment are normal, the vector of each phase current is equal to zero, therefore, zero
The secondary side winding no signal output of sequence current transformer, executive component is failure to actuate.When occurring to get an electric shock or each during leak current fault
The vector of phase current is not zero, and fault current makes to produce in the iron core of zero sequence current mutual inductor magnetic flux, zero sequence current mutual inductor
Produced electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, can take accordingly according to electrical leakage quantity
Protection act.
Mostly the mounting means of existing zero sequence current mutual inductor is to use flange install fixing or use bonding mode to fix,
Its installation site is it is generally required to reserve, therefore makes its application by more restriction.
Summary of the invention
It is an object of the invention to provide and a kind of be easily installed location, there is preferable firmness, effectively prevent the intelligence that loosens
Can type mesohigh zero sequence current mutual inductor.
The technical scheme realizing the object of the invention is: a kind of intelligent mesohigh zero sequence current mutual inductor, including a core
Pipe, a plug, a current transformer, two pressure rings and two set wire clipping components；Core tube wall is provided with multiple radially-directed
Hole；Each pressure ring rotates and is arranged on core pipe periphery wall；Each pressure ring includes that internal perisporium is provided with the spine ring of multiple slopes groove；Each slope
Groove is provided with multiple wedge shape anticreep tooth；Each pressure ring and corresponding a set of wire clipping component are adaptive；Each set wire clipping component included along core pipe week
To equally distributed multiple paw assemblies；Two set wire clipping components are axially arranged side by side along core pipe；Each paw assembly includes at least three
Individual paw and the back-moving spring for paw offer reseting elasticity；Each paw includes pressing plate portion and the footpath being arranged on pressing plate portion outer wall
To traveller；The outboard end of each radially traveller is provided with the chisel teeth adaptive with the wedge shape anticreep tooth in the groove of spine ring slope；Each paw
Pressing plate portion is positioned in core pipe tube chamber, and the radial direction traveller of each paw is through the corresponding radially-directed hole on core tube wall, multiple
Under the elastic force effect of position spring, on the wedge shape anticreep tooth in a corresponding slope groove of the chisel teeth apical grafting on each radially traveller；
The inwall of a corresponding pressure ring is just arranged by the radial direction traveller in each set wire clipping component, and the chisel teeth in each set wire clipping component all pushes up
It is connected on the wedge shape anticreep tooth in a corresponding pressure ring；Plug is positioned in core pipe tube chamber；The periphery wall of plug is provided with at least three
Individual arc clip slot, each arc clip slot is axially extending along core pipe, and each arc clip slot is just to the arcuate groove on a corresponding paw inwall
Arrange；The clamping altogether of each arc clip slot and corresponding arcuate groove forms at least three clamp hole；Current transformer is provided with annular matrix,
Each clamp hole is respectively positioned in the vestibule of annular matrix；Also include two axial back-up rings；The periphery wall of core pipe is provided with the gear of evagination
Platform and the annular groove of two indents, gear platform is positioned in the middle of two annular grooves；Each axial back-up ring is arranged on a corresponding annular
In groove；The both sides of two pressure ring separation gear platforms, one end of a side of each pressure ring and gear platform is slided adjacent, another side and phase
An axial back-up ring is answered to slide adjacent；The internal perisporium of spine ring and the internal perisporium of clamping connection ring are coplanar, the periphery wall of spine ring and clamping connection ring
Periphery wall coplanar；The periphery wall of pressure ring is provided with multiple binding groove axially penetrating through whole pressure ring along core pipe；Each spine ring rotates
Time drive the wedge shape anticreep tooth on its inwall to rotate, by extrude each paw radial direction traveller, drive corresponding a set of wire clipping component
In pressing plate portion move towards core tube hub.
The present invention has a positive effect: the zero sequence current mutual inductor of (1) present invention owing to carrying press claw type retaining mechanism,
Need not reserved installation position, it is easy to installing, and have preferable anti-loosening effect, firm intensity is relatively high and stable reliably.(2) originally
Bigger pressure can be applied, and there is excellent anti-loosening effect, the reliability of long-term work is effectively ensured.(3) this reality
Execute example by using two set wire clipping components clamping electric power cables, a set of be out of order, another set of still can ensure that work, have double
The technique effect of insurance.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the first structure of the present invention；
Fig. 2 is that shown in Fig. 1, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 3 is the A-A sectional view of Fig. 2；
Fig. 4 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 5 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 1 removes pressure ring and back-up ring；
Fig. 6 is a kind of explosive view of paw assembly in Fig. 1；
Fig. 7 is that the one of the second structure of the present invention partly cuts open structural representation；
Fig. 8 is a kind of perspective view of zero sequence current mutual inductor core pipe shown in Fig. 7；
Fig. 9 is that the one of the third structure of the present invention partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of intelligent mesohigh zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 6, including a core pipe
2, the axial back-up ring of a plug 8, two pressure rings of 7, current transformer 1, two 4 and two set wire clipping components 9.
Each pressure ring 1 includes spine ring 11, two clamping connection rings 12 of separation spine ring both sides and multiple connecting rivet 13；Each pressure ring
In, two clamping connection rings clamping spine rings, connecting rivet axially penetrates through described spine ring and two clamping connection rings along core pipe, thus by spine ring and
Two clamping connection rings are fixedly connected into an entirety.The internal perisporium of spine ring is provided with multiple slopes groove 111, is provided with many in the groove of each slope
Individual wedge shape anticreep tooth 112；In the present embodiment, the internal perisporium of spine ring and the internal perisporium of clamping connection ring are coplanar, the periphery wall of spine ring and folder
The periphery wall of T-Ring is coplanar；The periphery wall of pressure ring is provided with multiple binding groove 14 axially penetrating through whole pressure ring along core pipe, pressure ring
Twist operation use hook type spanner (being commonly called as hook spanner).In concrete practice, the internal diameter of clamping connection ring also can be slightly smaller than spine ring
Internal perisporium.Slope groove in the present embodiment refers to the groove that depth of groove is gradually incremented by another side from a side.
The periphery wall of core pipe 2 is provided with gear platform 21 and the annular groove 22 of two indents of evagination, and gear platform is positioned at two rings
In the middle of connected in star；Core pipe is provided with four radially-directed holes 23 on the tube wall between gear platform and each annular groove, these four radial directions
Pilot hole is uniformly distributed along core pipe circumference；In the present embodiment, each radially-directed hole extends radially through core tube wall along core pipe, each radial direction
Pilot hole includes the accommodating hole 231 of connection and guides slide opening 232, and accommodating hole and guiding slide opening are along direction from outside to inside successively
Arranging, accommodating hole and guiding slide opening are all circular holes, and the aperture of accommodating hole is more than the aperture of guiding slide opening, cutting of each radially-directed hole
Face shape is T-shaped.Each axial back-up ring is arranged in a corresponding annular groove of core pipe.
Each pressure ring rotates and is arranged on core pipe periphery wall, the both sides of two pressure rings separation gear platforms, a side of each pressure ring and
One end of gear platform is slided adjacent, and another side and a corresponding axial back-up ring slide adjacent.
Each set wire clipping component includes that, along the core pipe equally distributed multiple paw assemblies 3 of circumference, the present embodiment selects four, tool
In body practice, can select between two to five.Two set wire clipping components are provided adjacent to the most side by side along core pipe.In the present embodiment,
Multiple paw assemblies 3 in each set wire clipping component form a clamp hole 5 for clamping.Each set wire clipping component and a corresponding pressure
Ring is adaptive.
Each paw assembly 3 include a paw 31, be paw provide the back-moving spring 32 of reseting elasticity and one solid
Surely the mat 33 being arranged on each paw；Each paw include pressing plate portion 311, the radial direction traveller 312 being arranged on pressing plate portion outer wall,
It is arranged on the annular slot 313 on radial direction traveller periphery wall；Guiding slide opening in each radially traveller and radially-directed hole is adaptive, respectively
Radially traveller guide slide opening position-limiting action under along core caliber to reciprocatingly sliding；The outboard end of each radially traveller is provided with chisel teeth
34；Wedge shape anticreep tooth in each chisel teeth and spine ring slope groove is adaptive；Radial direction traveller in each set wire clipping component is just to corresponding one
The inwall of individual pressure ring is arranged.Each mat is fixed in the annular slot of a corresponding radial direction traveller, and each back-moving spring is sheathed
At corresponding one radially on traveller, each back-moving spring is connected in a corresponding annular mat along core caliber outer end upwards, multiple
Position spring is connected on the diapire of accommodating hole along core caliber the inner upwards；
The pressing plate portion of each paw is positioned in core pipe tube chamber, and the radial direction traveller of each paw is through corresponding on core tube wall
Radially-directed hole；Under the elastic force effect of back-moving spring, the chisel teeth apical grafting on each radially traveller spine ring corresponding one tiltedly
On wedge shape anticreep tooth in the groove of slope；The equal apical grafting of chisel teeth in each set wire clipping component wedge shape anticreep tooth in a corresponding pressure ring
On；Under the position-limiting action of slope groove and chisel teeth, the pressure ring in the present embodiment is twisted only along a direction, has anti-down
Move back namely anti-loosening technique effect.
The inwall in each paw pressing plate portion is provided with arcuate groove 314.
Plug 7 is positioned in core pipe tube chamber；The periphery wall of plug is provided with multiple arc clip slot 71, and each arc clip slot is along core pipe
Axially extending, the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot；Each arc clip slot and a corresponding arc
Shape groove clamping forms a clamp hole 5；So the present embodiment can form four clamp holes, can be used for simultaneously clamping on four cables.
The periphery wall of plug is provided with four the support location flanges 72 protruded along core pipe radial direction, the internal perisporium of core pipe
Being provided with four positioning runners 24, each outboard end supporting location flange is embedded in a corresponding positioning runner, thus core
Rod is positioned in the tube chamber of matrix slip pipe.
Current transformer includes annular matrix 81；Annular matrix is fixedly installed on a clamping connection ring；In the present embodiment, one
Individual clamping connection ring is provided with installation gap 121 at a side of adjacent spine ring, and annular matrix is inlaid in this installation gap；This structure
The present embodiment can be used as a high-voltage mutual inductor.
In concrete practice, no matter annular matrix is fixed on where, as long as making clamp hole be positioned in the vestibule of annular matrix,
As long as namely allowing by folder electric power cable through annular matrix.
The present embodiment forms four clamp holes altogether, and during use, wherein three clamp holes respectively clamp a phase line cable, additionally
One folder hole is as standby.Owing to three electric power cables pass from matrix slip pipe tube chamber, this current transformer can be by sense
Answer mode that three electric power cables are carried out zero-sequence current detection, find leakage current fault in time, and pass through wireless receiving and dispatching
Unit sends real time information to distance host, provides basic data for power circuit intellectuality.
The present embodiment, when operation, uses hook type spanner to twist each pressure ring so that each pressure ring drives the wedge in its slope groove
Shape anticreep tooth rotates, thus extrudes the radial direction traveller in corresponding a set of wire clipping component, overcomes the elastic force of each back-moving spring so that should
Pressing plate portion in set wire clipping component is along the radially-inwardly sliding of core pipe, so that the clamping of this set wire clipping component is positioned in clamp hole
Electric power cable.The most corresponding corresponding a set of wire clipping component of two pressure rings in the present embodiment, each can be individually operated；By adopting
With two set wire clipping components clamping electric power cables, a set of it is out of order, another set of still can ensure that work, there is the technology of dual fail-safe
Effect.
The present embodiment is arranged at the longitudinal center line of intelligent mesohigh zero sequence current mutual inductor by cable is clamped,
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 leads to
Cross and there is the slope groove of wedge shape anticreep tooth each paw is positioned, the technique effect preventing from falling back can be played, and by passing
The bolt assembly clamping electric power cable of system is compared, particularly excellent in anti-loosening effect, and stably may be used of long-term work is effectively ensured
By property.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Fig. 7 and Fig. 8, the electricity in the present embodiment
Current transformer 8 also includes intelligent control module 82；The periphery wall of core pipe is provided with resettlement groove 25, and intelligent control module is arranged on peace
Put in groove；Intelligent control module can include wireless transmit/receive units and alarm buzzer, and intelligent control module is by wireless receipts
Secondary voltage or current signal that bill unit senses annular matrix send distance host to, to realize the most unmanned of precision
Monitoring；This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
(embodiment 3)
The present embodiment and embodiment 2 are essentially identical, and difference is: as shown in Figure 9, and the present embodiment is no longer mutual electric current
The annular matrix of sensor is arranged in clamping connection ring, and in the present embodiment, the annular matrix of current transformer is fixedly installed on core pipe periphery
On wall, this scheme is also feasible, and structure is compacter and easily fabricated processing.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.And these
Belong to obvious change that the connotation of the present invention extended out or variation still falls within protection scope of the present invention.
Claims (1)
1. an intelligent mesohigh zero sequence current mutual inductor, it is characterised in that: include a core pipe, plug, an electricity
Current transformer, two pressure rings and two set wire clipping components；Core tube wall is provided with multiple radially-directed hole；Each pressure ring rotates and is arranged on
On core pipe periphery wall；Each pressure ring includes that internal perisporium is provided with the spine ring of multiple slopes groove；Each slope groove is provided with multiple wedge shape prevent
De-tooth；Each pressure ring and corresponding a set of wire clipping component are adaptive；Each set wire clipping component includes along the core pipe equally distributed multiple pressures of circumference
Claw assembly；Two set wire clipping components are axially arranged side by side along core pipe；Each paw assembly includes at least three paw and provides for paw
The back-moving spring of reseting elasticity；Each paw includes pressing plate portion and the radial direction traveller being arranged on pressing plate portion outer wall；Each radially traveller
The chisel teeth that outboard end is provided with and wedge shape anticreep tooth in the groove of spine ring slope is adaptive；The pressing plate portion of each paw is positioned at core pipe tube chamber
In, the radial direction traveller of each paw is through the corresponding radially-directed hole on core tube wall, under the elastic force effect of back-moving spring,
On the chisel teeth apical grafting on each radially traveller wedge shape anticreep tooth in a corresponding slope groove；Radial direction in each set wire clipping component
The inwall of a corresponding pressure ring is just arranged by traveller, and the equal apical grafting of chisel teeth in each set wire clipping component is in a corresponding pressure ring
On wedge shape anticreep tooth；Plug is positioned in core pipe tube chamber；The periphery wall of plug is provided with at least three arc clip slot, each arc clip slot
Axially extending along core pipe, the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot；Each arc clip slot is with corresponding
Arcuate groove altogether clamping form at least three clamp hole；Current transformer is provided with annular matrix, and each clamp hole is respectively positioned on circular base
In the vestibule of body；Also include two axial back-up rings；The annular keeping off platform and two indents that the periphery wall of core pipe is provided with evagination is recessed
Groove, gear platform is positioned in the middle of two annular grooves；Each axial back-up ring is arranged in a corresponding annular groove；Two pressure ring separation gears
The both sides of platform, one end of a side of each pressure ring and gear platform is slided adjacent, another side and corresponding axial back-up ring slip neighbour
Connect；The internal perisporium of spine ring and the internal perisporium of clamping connection ring are coplanar, and the periphery wall of spine ring and the periphery wall of clamping connection ring are coplanar；Outside pressure ring
Perisporium is provided with multiple binding groove axially penetrating through whole pressure ring along core pipe；Each spine ring drives the wedge shape on its inwall to prevent when rotating
De-tooth rotates, and by extruding the radial direction traveller of each paw, drives the pressing plate portion in corresponding a set of wire clipping component towards core tube hub
Mobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097571.0A CN106057408A (en) | 2016-01-15 | 2016-01-15 | Intelligent medium-high voltage zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097571.0A CN106057408A (en) | 2016-01-15 | 2016-01-15 | Intelligent medium-high voltage zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106057408A true CN106057408A (en) | 2016-10-26 |
Family
ID=57484237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610097571.0A Withdrawn CN106057408A (en) | 2016-01-15 | 2016-01-15 | Intelligent medium-high voltage zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106057408A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN103490350A (en) * | 2013-10-08 | 2014-01-01 | 国家电网公司 | Peeling and cutting tool for outer semi-conducting layer of crosslinked power cable |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
-
2016
- 2016-01-15 CN CN201610097571.0A patent/CN106057408A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN103490350A (en) * | 2013-10-08 | 2014-01-01 | 国家电网公司 | Peeling and cutting tool for outer semi-conducting layer of crosslinked power cable |
| CN204884841U (en) * | 2015-08-17 | 2015-12-16 | 广东腾达电力科技有限公司 | Undercurrent route selection is high accuracy opening CT for device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20161026 |