CN105826007A - Intelligent middle-high pressure zero-sequence current transformer - Google Patents
Intelligent middle-high pressure zero-sequence current transformer Download PDFInfo
- Publication number
- CN105826007A CN105826007A CN201610097555.1A CN201610097555A CN105826007A CN 105826007 A CN105826007 A CN 105826007A CN 201610097555 A CN201610097555 A CN 201610097555A CN 105826007 A CN105826007 A CN 105826007A
- Authority
- CN
- China
- Prior art keywords
- paw
- ring
- core pipe
- current transformer
- radial direction
- 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- Withdrawn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
- H01F38/22—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
Abstract
The invention discloses an intelligent middle-high pressure zero-sequence current transformer. The intelligent middle-high pressure zero-sequence current transformer comprises a core tube, a core rod, a current transformer, two pressing rings and two sets of wire clamping components; radial guide holes are formed in the core tube; the pressing rings are rotationally arranged on the outer peripheral wall of the core tube; each pressing ring comprises a ratchet ring provided with multiple slope grooves in the inner peripheral wall; wedge-shaped anti-stripping teeth are arranged in each slope groove; each pressing claw component comprises at least three pressing claws and reset springs; each pressing claw comprises a pressing plate part and a radial sliding column; each radial sliding column is provided with wedge-shaped teeth; each pressing plate part is located in a tube cavity of the core tube, each radial sliding column passes through a corresponding radial guide hole, and each wedge-shaped tooth is propped on the wedge-shaped anti-stripping tooth in a 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 together; the current transformer comprises an annular base body; and the wire clamping holes are all located in a hole cavity of the annular base body; when each ratchet ring is rotated, the pressing plate part in a corresponding set of the wire clamping components is driven to move toward the center of the core tube. The intelligent middle-high pressure zero-sequence current transformer disclosed by the invention has better electrical performance.
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 algebraical sum of telegram in reply stream of any node in circuit equal to zero.In the case of circuit and electrical equipment are normal, 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 electric current produced by zero sequence current mutual inductor 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 use flange install fixing or use bonding mode to fix, and 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 intelligent mesohigh zero sequence current mutual inductor that loosens.
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 includes along the core pipe equally distributed multiple paw assemblies of circumference；Two set wire clipping components are axially arranged side by side along core pipe；Each paw assembly includes at least three paw and provides the back-moving spring of reseting elasticity for paw；Each paw includes pressing plate portion and the radial direction traveller being arranged on pressing plate portion outer wall；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；The pressing plate portion of each paw 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, under the elastic force effect of back-moving 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, on the wedge shape anticreep tooth in a corresponding pressure ring of the equal apical grafting of chisel teeth in each set wire clipping component；Plug is positioned in core pipe tube chamber；The periphery wall of plug is provided with at least three arc clip slot, and each arc clip slot is axially extending along core pipe, and the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot；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, and each clamp hole is respectively positioned in the vestibule of annular matrix；Each pressure ring also includes two clamping connection rings and multiple connecting rivet, two clamping connection ring separation spine ring both sides, and spine ring and two clamping connection ring rivetings are axially fixed by connecting rivet along core pipe；Each paw assembly also includes mat；Each paw also includes the annular slot being arranged on radial direction traveller periphery wall；Each mat is fixed in the annular slot of a corresponding radial direction traveller；Each back-moving spring is set on a corresponding radial direction traveller, and the outer end of each back-moving spring is connected in a corresponding annular mat, and the inner of each back-moving spring is connected on core pipe；Each spine ring drives the wedge shape anticreep tooth on its inwall to rotate when rotating, and by extruding the radial direction traveller of each paw, drives the pressing plate portion in corresponding a set of wire clipping component to move towards core tube hub.
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 preferable anti-loosening effect, firm intensity is relatively high and stable reliably.(2) originally can apply bigger pressure, and there is the anti-loosening effect of excellence, the reliability of long-term work is effectively ensured.(3) the present embodiment is by using two set wire clipping components clamping electric power cables, a set of is out of order, and another set of still can ensure that work, has the technique effect of dual fail-safe.
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 the axial back-up ring of 2, plug of a core pipe, 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；In each pressure ring, two clamping connection ring clamping spine rings, connecting rivet axially penetrates through described spine ring and two clamping connection rings along core pipe, thus spine ring and two clamping connection rings is fixedly connected into an entirety.The internal perisporium of spine ring is provided with multiple slopes groove 111, is provided with multiple wedge shape anticreep tooth 112 in the groove of each slope；In the present embodiment, 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；The periphery wall of pressure ring is provided with multiple binding groove 14 axially penetrating through whole pressure ring along core pipe, and the operation of twisting of pressure ring uses 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 the internal perisporium of spine ring.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 in the middle of two annular grooves；Core pipe is provided with four radially-directed holes 23 on the tube wall between gear platform and each annular groove, and these four radially-directed holes are uniformly distributed along core pipe circumference；In the present embodiment, each radially-directed hole extends radially through core tube wall along core pipe, each radially-directed hole includes the accommodating hole 231 of connection and guides slide opening 232, accommodating hole and guiding slide opening set gradually along direction from outside to inside, accommodating hole and guiding slide opening are all circular holes, the aperture of accommodating hole is more than the aperture of guiding slide opening, and the cross sectional shape in each radially-directed hole 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 ring separation gear platforms, and one end of a side of each pressure ring and gear platform is slided adjacent, and another side and a corresponding axial back-up ring slide adjacent.
Each set wire clipping component includes that the present embodiment is selected four, in concrete practice, can be selected between two to five along core pipe circumference equally distributed multiple paw assemblies 3.Two set wire clipping components are provided adjacent to the most side by side along core pipe.In the present embodiment, the 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 adaptation.
Each paw assembly 3 includes that a paw 31, is that paw provides the back-moving spring 32 of reseting elasticity and a mat being fixedly installed on each paw 33；Each paw includes pressing plate portion 311, the radial direction traveller 312 being arranged on pressing plate portion outer wall, the annular slot 313 that is arranged on radially traveller periphery wall；Guiding slide opening in each radially traveller and radially-directed hole is adaptive, each radially traveller under the position-limiting action guiding slide opening 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；The inwall of a corresponding pressure ring is just arranged by the radial direction traveller in each set wire clipping component.Each mat is fixed in the annular slot of a corresponding radial direction traveller, each back-moving spring is set on a corresponding radial direction traveller, each back-moving spring is connected in a corresponding annular mat along core caliber outer end upwards, and back-moving 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 the corresponding radially-directed hole on core tube wall；Under the elastic force effect of back-moving spring, on the wedge shape anticreep tooth in a corresponding slope groove of spine ring of the chisel teeth apical grafting on each radially traveller；On the equal apical grafting of chisel teeth in each set wire clipping component wedge shape anticreep tooth in a corresponding pressure ring；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-retrogression 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 axially extending along core pipe, and the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot；Each arc clip slot and a corresponding arcuate groove clamping form 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 is provided with four positioning runners 24, each outboard end supporting location flange is embedded in a corresponding positioning runner, thus plug 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, a 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 makes the present embodiment can use 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, and another one folder hole is as standby.Owing to three electric power cables pass from matrix slip pipe tube chamber, this current transformer can carry out zero-sequence current detection by induction mode to three electric power cables, leakage current fault is found in time, and send real time information to distance host by wireless transmit/receive units, provide basic data for power circuit intellectuality.
The present embodiment is when operation, hook type spanner is used to twist each pressure ring, each pressure ring is made to drive the wedge shape anticreep tooth in its slope groove to rotate, thus extrude the radial direction traveller in corresponding a set of wire clipping component, overcome the elastic force of each back-moving spring, make the pressing plate portion in this set wire clipping component along the radially-inwardly sliding of core pipe so that this set wire clipping component clamping be positioned at the electric power cable in clamp hole.The most corresponding corresponding a set of wire clipping component of two pressure rings in the present embodiment, each can be individually operated；By using 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 technique effect of dual fail-safe.
The present embodiment is by being arranged on cable clamping at the longitudinal center line of intelligent mesohigh zero sequence current mutual inductor, and its gravity centre distribution is relatively reasonable, when on the overhead power line of high-altitude, is conducive to alleviating vibration；Additionally, each paw is positioned by the present embodiment by having the slope groove of wedge shape anticreep tooth, can play the technique effect preventing from falling back, and compares with by traditional bolt assembly clamping electric power cable, in anti-loosening effect particularly excellent, the reliability of long-term work is effectively ensured.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Fig. 7 and Fig. 8, and the current transformer 8 in the present embodiment also includes intelligent control module 82；The periphery wall of core pipe is provided with resettlement groove 25, and intelligent control module is arranged in resettlement groove；Intelligent control module can include wireless transmit/receive units and alarm buzzer, and secondary voltage or current signal that intelligent control module is sensed annular matrix by wireless transmit/receive units send distance host to, to realize accurate long-range no worker monitor；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, difference is: as shown in Figure 9, the present embodiment is no longer arranged on the annular matrix of current transformer in clamping connection ring, in the present embodiment, the annular matrix of current transformer is fixedly installed on core pipe periphery 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 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 obvious 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. an intelligent mesohigh zero sequence current mutual inductor, it is characterised in that: include 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 includes along the core pipe equally distributed multiple paw assemblies of circumference；Two set wire clipping components are axially arranged side by side along core pipe；Each paw assembly includes at least three paw and provides the back-moving spring of reseting elasticity for paw；Each paw includes pressing plate portion and the radial direction traveller being arranged on pressing plate portion outer wall；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；The pressing plate portion of each paw 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, under the elastic force effect of back-moving 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, on the wedge shape anticreep tooth in a corresponding pressure ring of the equal apical grafting of chisel teeth in each set wire clipping component；Plug is positioned in core pipe tube chamber；The periphery wall of plug is provided with at least three arc clip slot, and each arc clip slot is axially extending along core pipe, and the arcuate groove on a corresponding paw inwall is just arranged by each arc clip slot；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, and each clamp hole is respectively positioned in the vestibule of annular matrix；Each pressure ring also includes two clamping connection rings and multiple connecting rivet, two clamping connection ring separation spine ring both sides, and spine ring and two clamping connection ring rivetings are axially fixed by connecting rivet along core pipe；Each paw assembly also includes mat；Each paw also includes the annular slot being arranged on radial direction traveller periphery wall；Each mat is fixed in the annular slot of a corresponding radial direction traveller；Each back-moving spring is set on a corresponding radial direction traveller, and the outer end of each back-moving spring is connected in a corresponding annular mat, and the inner of each back-moving spring is connected on core pipe；Each spine ring drives the wedge shape anticreep tooth on its inwall to rotate when rotating, and by extruding the radial direction traveller of each paw, drives the pressing plate portion in corresponding a set of wire clipping component to move towards core tube hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097555.1A CN105826007A (en) | 2016-01-15 | 2016-01-15 | Intelligent middle-high pressure zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097555.1A CN105826007A (en) | 2016-01-15 | 2016-01-15 | Intelligent middle-high pressure zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105826007A true CN105826007A (en) | 2016-08-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610097555.1A Withdrawn CN105826007A (en) | 2016-01-15 | 2016-01-15 | Intelligent middle-high pressure zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105826007A (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 CN201610097555.1A patent/CN105826007A/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 | ||
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Application publication date: 20160803 |