CN105742024A - Improved high-voltage zero-sequence current transformer - Google Patents
Improved high-voltage zero-sequence current transformer Download PDFInfo
- Publication number
- CN105742024A CN105742024A CN201610099047.7A CN201610099047A CN105742024A CN 105742024 A CN105742024 A CN 105742024A CN 201610099047 A CN201610099047 A CN 201610099047A CN 105742024 A CN105742024 A CN 105742024A
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- CN
- China
- Prior art keywords
- core pipe
- paw
- tube
- boss
- crimping
- 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
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- 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
-
- 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
Abstract
The invention discloses an improved high-voltage zero-sequence current transformer. The improved high-voltage zero-sequence current transformer comprises a base tube, a core tube, two crimping elements and two press claw assemblies, wherein a plurality of wire clamping bosses are arranged on the inner peripheral wall of the base tube, two groups of guide holes are formed in the tube wall of the core tube, each guide holes group comprises a plurality of radial limiting sliding holes, two internal thread regions are arranged on the inner wall of the core tube, each press claw assembly comprises a plurality of press claws, each press claw comprises a press plate part, a guide sliding block part and a driving surface, each crimping element comprises a body, an external thread region and a crimping boss, the external thread region is arranged on the outer peripheral wall of the body, the crimping boss is arranged on the inner side end of a columnar body, the external thread region of the each crimping element is adaptive to the internal thread region of the core tube, the driving surface of each press claw is adaptive to the outer peripheral wall of each crimping boss, and the press plate part of one corresponding press claw assembly is driven to outwards move along the radial direction of the core tube when each crimping element rotates along a preset direction. The improved high-voltage zero-sequence current transformer has excellent performance.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of improved high-voltage 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.Under circuit with the normal situation of electrical equipment, the vector of each phase current is equal to zero, and therefore, the secondary side winding no signal output of zero sequence current mutual inductor, executive component is failure to actuate.When the vector of each phase current occurring to get an electric shock or during leak current fault is not zero, fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and produced by zero sequence current mutual inductor, electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, corresponding protection act can be taked according to electrical leakage quantity.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, and its installation site is it is generally required to reserve, so that the application of zero sequence current mutual inductor is subject to more restriction.
Summary of the invention
It is an object of the invention to provide and a kind of be easily installed location, there is the improved high-voltage zero sequence current mutual inductor of better firmness.
The technical scheme realizing the object of the invention is: a kind of improved high-voltage zero sequence current mutual inductor, including a base tube, a core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is provided with multiple clamp boss；Core pipe is arranged in base tube tube chamber；The tube wall of core pipe is provided with two groups of pilot holes, and each group pilot hole includes the spacing slide opening of multiple radial direction；The inwall of core pipe is provided with two internal threaded regions；Each casing pressure claw assembly all includes multiple paw；Each paw includes pressing plate portion, protrudes the guide runner portion formed and the drive surface being arranged on guide runner portion from pressing plate portion；Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, and each drive surface stretches in the tube chamber of core pipe, and each pressing plate portion is positioned between base tube inwall and core tube wall；Pressing plate portion and a corresponding clamp boss clamping of each paw form a clamp hole for clamping electric power cable；Each crimp includes body, be arranged on body peripheral wall external screw thread district and the crimping boss being arranged on cylindrical body medial extremity, the external screw thread district of crimp and the internal threaded regions of core pipe are adaptive；The periphery wall of the drive surface of each paw and crimping boss is adaptive；The inwall of each clamp boss is provided with arcuate groove；The outer wall in each paw pressing plate portion is provided with arc clip slot；Each arc clip slot and arcuate groove are provided with multiple puncture；Being provided with multiple installation draw-in groove in each arc clip slot and arcuate groove, each installation in draw-in groove is embedded with a piercing blade；Each sheet that punctures includes installation portion and stings blade, and installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture；Each crimp along preset direction rotate time, crimping boss is driven to rotate while advancing in core pipe tube chamber, crimping boss promotes each paw by pushing the drive surface in corresponding a set of paw assembly, pressing plate portion in corresponding a set of paw assembly is moved radially outward, thus clamping is arranged in the electric power cable in clamp hole along core pipe.
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 install.(2) crimp and core pipe connect threadably, and push the drive surface of each paw by crimping boss, and then promote each paw to move along core pipe radial direction；Its operation is comparatively laborsaving, and has good anti-loosening effect.(3) present invention adopts two casing pressure claw assemblies to be clamped on same cable, the clamp operation of each casing pressure claw assembly can individually carry out, this structure has the effect of double shield, in use goes wrong even if wherein a set of, also has its service behaviour of another set of guarantee.
Accompanying drawing explanation
The one that Fig. 1 is the first structure of the present invention partly cuts open schematic diagram；
Fig. 2 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 3 is a kind of front view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 4 is that shown in Fig. 2, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 5 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 6 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 2 removes base tube and crimp；
The one that Fig. 7 is the second structure of the present invention partly cuts open structural representation；
Fig. 8 is a kind of structural representation of zero sequence current mutual inductor shown in Fig. 7.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of improved high-voltage zero sequence current mutual inductor, sees shown in Fig. 1 to Fig. 6, including 1, core pipe of a base tube, 7, two crimps of 2, current transformer 3 and two casing pressure claw assemblies 8.
In the present embodiment, base tube, 2, two crimps of core pipe 3 and two casing pressure claw assemblies 8 all adopt insulant to make.
The internal perisporium of base tube is provided with four clamp boss 11, and the inwall of each clamp boss is provided with arcuate groove 111, and each clamp boss and arcuate groove are all axially extending along base tube.The internal perisporium of base tube is axially additionally provided with multiple positioning runner 12 along base tube.
Core pipe and base tube are arranged concentrically, and core pipe is arranged in base tube tube chamber；The periphery wall of core pipe is provided with four support flanges 21 extended along base tube radially protruding, and each outboard end supporting flange is arranged in a corresponding positioning runner, thus core pipe is supported in the tube chamber being positioned at base tube；The tube wall of core pipe is provided with two groups of pilot holes, and each group pilot hole and a set of paw assembly are adaptive；Each group pilot hole includes four spacing slide openings 22 of radial direction, and these four spacing slide openings of radial direction are evenly distributed on core tube wall along core pipe circumference；Each radially spacing slide opening all extends radially through core tube wall along base tube；Each radially spacing slide opening is positioned at core pipe middle part axially, and the cross sectional shape of each radially spacing slide opening is I-shaped.The inwall of core pipe is provided with two internal threaded regions 23, and two groups of pilot holes are between two internal threaded regions；In the present embodiment, two internal threaded regions are arranged on the inwall at core pipe two side ends adjacent openings place.
In concrete practice, the cross sectional shape of guiding slide opening may be used without other shape, for instance circular, square, rhombus, is all feasible.
Each casing pressure claw assembly 8 includes four paws 4；Each paw includes pressing plate portion 41, from the guide runner portion 42 of the inwardly projecting formation of inwall in pressing plate portion and the drive surface 43 that is arranged on guide runner portion；Pressing plate portion is axially extending along base tube, and guide runner portion radially extends along base tube；The outer wall in each paw pressing plate portion is provided with arc clip slot 411；Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, and each drive surface stretches in the tube chamber of core pipe, and each pressing plate portion is positioned between base tube inwall and core tube wall；Each paw reciprocatingly slides along the radial direction of base tube under the guide and limit effect of radially spacing slide opening；The cross sectional shape in each guide runner portion is adaptive with radially spacing slide opening I-shaped.
A corresponding clamp boss clamping in each pressing plate portion and base tube forms a clamp hole 5 for clamping electric power cable；In the present embodiment, the arc clip slot in each pressing plate portion and the arcuate groove clamping of a corresponding clamp boss form the clamp hole 5 for clamping electric power cable；The present embodiment forms four clamp holes altogether.
Each crimp 3 includes cylindrical body 31, the external screw thread district 32 being arranged on cylindrical body periphery wall, the fastening part 33 being arranged on cylindrical body outboard end and the crimping boss 34 being arranged on cylindrical body medial extremity, crimping boss be shaped as circular cone shape；The external screw thread district of each crimp and the internal threaded regions of core pipe are adaptive；Crimping axially extending along base tube of boss, and it is arranged in core pipe tube chamber.
In the present embodiment, the drive surface of each paw is the curved surface of and crimping boss periphery wall adaptation, and in concrete practice, this drive surface also can be selected for inclined-plane.
In the present embodiment, in each casing pressure claw assembly, the quantity of paw is identical with the quantity of the slide opening that leads in each group of pilot hole, and at least three..
Current transformer 7 includes toroidal inductive body 71 and intelligent control module 72；In the present embodiment, intelligent control module 72 is made has onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are arranged side by side combination and form annular, on the overall sheathed periphery wall being fixed on base tube of current transformer.In concrete practice, current transformer also can be fixedly installed on the tube wall of core pipe, as long as making all clamp holes be arranged in the vestibule of toroidal inductive body, namely has only to so that the vestibule of cable traverse toroidal inductive body.
Intelligent control module can include wireless transmit/receive units, and the leakage current signal that intelligent control module is sensed annular base tube by wireless transmit/receive units sends distance host to, to realize the long-range no worker monitor of precision, finds leak current fault in time.
The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each arcuate groove and arc clip slot；Specifically, the radially protruding along core pipe portion is respectively punctured.
In the present embodiment, each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding；In concrete practice, puncture may be used without alternate manner and makes；In each arcuate groove, such as it is provided with multiple installation draw-in groove, then the puncture sheet adopting insulant to make is inlaid in corresponding one and installs in draw-in groove；Puncturing sheet include installation portion and sting blade, installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture.In concrete practice, it is also possible to adopt in the mode being threaded in each arc clip slot and arcuate groove, also can improving clamping sigma compactness energy.
Each crimp along preset direction rotate time, crimping boss is driven to rotate while advancing in core pipe tube chamber, each crimping boss promotes paw by pushing the drive surface in corresponding a set of paw assembly, each pressing plate portion in corresponding a set of paw assembly is moved radially outward, thus clamping is arranged in the electric power cable in each clamp hole along core pipe.
The present embodiment has following Advantageous Effects: (1) crimp and core pipe connect threadably, and pushes the drive surface of each paw by crimping boss, and then promotes each paw to move along core pipe radial direction；Its operation is comparatively laborsaving, and has good anti-loosening effect.(2) present invention adopts two casing pressure claw assemblies to be clamped on same cable, the clamp operation of each casing pressure claw assembly can individually carry out, this structure has the effect of double shield, in use goes wrong even if wherein a set of, also has its service behaviour of another set of guarantee.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, are different in that: see shown in Fig. 7 to Fig. 8, in the present embodiment, on the annular perception sensing sheathed periphery wall being fixed on base tube of body；The periphery wall of base tube is provided with the routing hole 13 extending radially through tube wall；Base tube inwall, core tube wall, clamp boss, support between flange, paw pressing plate portion clamping form multiple containing cavity 73, intelligent control module is arranged in containing cavity；The electric connection line described routing hole of traverse between toroidal inductive body and intelligent control module.This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change that these connotations belonging to the present invention are extended out or variation still fall within protection scope of the present invention.
Claims (1)
1. an improved high-voltage zero sequence current mutual inductor, it is characterised in that: include a base tube, a core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is provided with multiple clamp boss；Core pipe is arranged in base tube tube chamber；The tube wall of core pipe is provided with two groups of pilot holes, and each group pilot hole includes the spacing slide opening of multiple radial direction；The inwall of core pipe is provided with two internal threaded regions；Each casing pressure claw assembly all includes multiple paw；Each paw includes pressing plate portion, protrudes the guide runner portion formed and the drive surface being arranged on guide runner portion from pressing plate portion；Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, and each drive surface stretches in the tube chamber of core pipe, and each pressing plate portion is positioned between base tube inwall and core tube wall；Pressing plate portion and a corresponding clamp boss clamping of each paw form a clamp hole for clamping electric power cable；Each crimp includes body, be arranged on body peripheral wall external screw thread district and the crimping boss being arranged on cylindrical body medial extremity, the external screw thread district of crimp and the internal threaded regions of core pipe are adaptive；The periphery wall of the drive surface of each paw and crimping boss is adaptive；The inwall of each clamp boss is provided with arcuate groove；The outer wall in each paw pressing plate portion is provided with arc clip slot；Each arc clip slot and arcuate groove are provided with multiple puncture；Being provided with multiple installation draw-in groove in each arc clip slot and arcuate groove, each installation in draw-in groove is embedded with a piercing blade；Each sheet that punctures includes installation portion and stings blade, and installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture；Each crimp along preset direction rotate time, crimping boss is driven to rotate while advancing in core pipe tube chamber, crimping boss promotes each paw by pushing the drive surface in corresponding a set of paw assembly, pressing plate portion in corresponding a set of paw assembly is moved radially outward, thus clamping is arranged in the electric power cable in clamp hole along core pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099047.7A CN105742024A (en) | 2016-01-15 | 2016-01-15 | Improved high-voltage zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099047.7A CN105742024A (en) | 2016-01-15 | 2016-01-15 | Improved high-voltage zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105742024A true CN105742024A (en) | 2016-07-06 |
Family
ID=56248246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610099047.7A Withdrawn CN105742024A (en) | 2016-01-15 | 2016-01-15 | Improved high-voltage zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742024A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869785A (en) * | 1997-06-10 | 1999-02-09 | Antec Corporation | Wire clamp with parallel gripping action |
| CN102354940A (en) * | 2011-10-29 | 2012-02-15 | 浙江左易电力设备有限公司 | Wedge-shape strain clamp of bunched cable |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
-
2016
- 2016-01-15 CN CN201610099047.7A patent/CN105742024A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869785A (en) * | 1997-06-10 | 1999-02-09 | Antec Corporation | Wire clamp with parallel gripping action |
| CN102354940A (en) * | 2011-10-29 | 2012-02-15 | 浙江左易电力设备有限公司 | Wedge-shape strain clamp of bunched cable |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160706 |
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| WW01 | Invention patent application withdrawn after publication |