CN105632695A - Electric power zero-sequence current transformer capable of improving wire clamp strength - Google Patents
Electric power zero-sequence current transformer capable of improving wire clamp strength Download PDFInfo
- Publication number
- CN105632695A CN105632695A CN201610096707.6A CN201610096707A CN105632695A CN 105632695 A CN105632695 A CN 105632695A CN 201610096707 A CN201610096707 A CN 201610096707A CN 105632695 A CN105632695 A CN 105632695A
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- CN
- China
- Prior art keywords
- core pipe
- pipe portion
- paw
- pressure ring
- current transformer
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- 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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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses an electric power zero-sequence current transformer capable of improving wire clamp strength. The electric power zero-sequence current transformer comprises a base body, a pressing ring, a core rod, a current transformer and a pressing claw assembly, wherein the base body comprises a base tube part, a core tube part and a connecting plate body; guiding sliding holes are formed in the tube wall of the core tube part; the pressing claw assembly comprises pressing claws; each pressing claw is provided with a plate pressing part and a guiding sliding column part; a stress inclined surface is arranged at the top end of each guiding sliding column part; each plate pressing part is positioned in the tube cavity of the core tube part; the pressing ring comprises a tapered crimping surface and an external threaded part; the tapered crimping surface presses the stress inclined surface of each pressing claw; the core rod is positioned in the tube cavity of the core tube part; at least three arc-shaped clamping grooves are formed in the outer circumferential wall of the core rod; each arc-shaped clamping groove is clamped with a corresponding arc-shaped groove to form a wire-clamping hole; the current transformer comprises an annular induction body; each wire-clamping hole is positioned in the corresponding hole cavity of the annular induction body; the pressing ring edge pushes and presses the stress inclined surfaces through the tapered crimping surface to enable each plate pressing part to move towards the center of the core tube part. The electric power zero-sequence current transformer has a relatively good electrical performance.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to the electric power zero sequence current mutual inductor of a kind of improving clamping line strength.
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 electric power zero sequence current mutual inductor of the improving clamping line strength of better firmness.
The technical scheme realizing the object of the invention is: the electric power zero sequence current mutual inductor of a kind of improving clamping line strength, including a matrix, a pressure ring, a plug, a current transformer and a set of paw assembly; Matrix includes the base tube portion being provided with internal threaded regions, the core pipe portion being arranged in base tube tube chamber and for connecting fixing base tube portion and the web portion in core pipe portion; The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole includes at least three guiding slide opening; Each guiding slide opening extends radially through the tube wall in core pipe portion along core pipe portion; Paw assembly includes at least three paw; Each paw is provided with pressing plate portion and guiding traveller portion; Guiding traveller portion protrudes above formation from pressing plate portion, and the top in guiding traveller portion is provided with a stress inclined-plane; The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion; Pressure ring includes the taper electrolysis setting within it on perisporium and the external screw thread district being arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stress inclined-plane of each paw, and the external screw thread district of pressure ring and the internal threaded regions in base tube portion are adaptive; Plug is arranged in core pipe portion 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 portion, 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; Current transformer includes toroidal inductive body; Each clamp hole is respectively positioned in the vestibule of toroidal inductive body; Pressure ring rotates and is arranged on the periphery wall in core pipe portion; The inwall of pressure ring is provided with the concentric stroking junction adjacent with the slip of core pipe portion periphery wall; The periphery wall of pressure ring and the periphery wall in base tube portion are equipped with multiple binding groove; The inwall in each pressing plate portion is provided with arcuate groove; Each arcuate groove is provided with multiple puncture; Each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; Pressure ring along preset direction rotate time, pushed the stress inclined-plane of each paw by taper electrolysis so that the pressing plate portion of each paw moves towards the center in core pipe portion, thus clamping is arranged in the electric power cable in clamp hole.
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) pressure ring and base tube portion connect threadably, and make it clamp electric power cable by the taper electrolysis each paw of crimping, and its operation is comparatively laborsaving, and has good anti-loosening effect; (3) by cable clamping is arranged on core tube hub place so that overall gravity centre distribution is relatively reasonable, when on the overhead power line of high-altitude, is conducive to alleviating vibration.
Accompanying drawing explanation
The one that Fig. 1 is the present invention partly cuts open structural representation;
Fig. 2 is a kind of perspective view of zero sequence current mutual inductor shown in Fig. 1;
Fig. 3 be zero sequence current mutual inductor shown in Fig. 1 from another angle observe time a kind of perspective view;
Fig. 4 is that in zero sequence current mutual inductor shown in Fig. 1, the one of matrix partly cuts open structural representation;
Fig. 5 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 1;
Fig. 6 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 1 removes pressure ring.
Detailed description of the invention
(embodiment 1)
The present embodiment is the electric power zero sequence current mutual inductor of a kind of improving clamping line strength, sees shown in Fig. 1 to Fig. 6, including 1, pressure ring of a matrix, 7, current transformer 8 of 2, plug and a set of paw assembly 3.
In the present embodiment, matrix 1, pressure ring 2, plug 7 and a set of paw assembly 3 all adopt insulant to make.
Matrix 1 includes the base tube portion 11 being provided with internal threaded regions 111, the core pipe portion 12 being arranged in base tube tube chamber and for connecting fixing base tube portion and the web portion 13 in core pipe portion; Base tube portion and core pipe portion are arranged concentrically, and web portion is in the annular slab between base tube portion and core pipe portion, and in the present embodiment, web portion is positioned at the end margin place, the same side in base tube portion and core pipe portion; The planform of web portion has only to meet and is fixedly connected with in base tube portion and core pipe portion.
Base tube portion in the present embodiment, core pipe portion and web portion are integral pieces, may be used without the form of split part in concrete practice.
The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole includes four guiding slide openings 121, and these four guiding slide openings are evenly distributed on the tube wall in core pipe portion along the circumference in core pipe portion; Each guiding slide opening extends radially through the tube wall in core pipe portion along core pipe portion, and each shape leading slide opening is I shape. In concrete practice, the shape of guiding slide opening may be used without other shape, for instance circular, square, rhombus, is all feasible.
Paw assembly 3 includes four paws 31;
Each paw is provided with pressing plate portion 311 and guiding traveller portion 312; Guiding traveller portion protrudes from a side in pressing plate portion and is formed, and guiding traveller portion is arranged in a corresponding guiding slide opening, and the top in guiding traveller portion is provided with a stress inclined-plane 313; The one end away from guiding traveller portion in pressing plate portion is as the inwall in pressing plate portion, and the inwall in pressing plate portion is provided with arcuate groove 314. The shape in each traveller portion of leading and the shape adaptation of guiding slide opening.
The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion.
Pressure ring 2 includes the taper electrolysis 21 setting within it on perisporium and the external screw thread district 22 being arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stress inclined-plane of each paw, and the external screw thread district of pressure ring and the internal threaded regions in base tube portion are adaptive.
In the present embodiment, pressure ring rotates and is arranged on the periphery wall in core pipe portion, and the inwall of pressure ring is provided with the concentric stroking junction adjacent with the slip of core pipe portion periphery wall; But in concrete practice, the internal perisporium of pressure ring can and the periphery wall in core pipe portion between reserve gap, be also feasible.
The present embodiment is equipped with multiple binding groove 5 on the periphery wall of pressure ring and the periphery wall in base tube portion, it is twisted and hook spanner can be adopted to operate, certainly may be used without other fastening means, hexagonal shape fastener head is such as set on the periphery wall in the periphery wall of pressure ring and base tube portion, is also feasible.
Plug is arranged in core pipe portion tube chamber; The periphery wall of plug is provided with four arc clip slots 71, and each arc clip slot is axially extending along core pipe portion, 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 4; So the present embodiment can form four clamp holes, during use, wherein three clamp holes respectively clamp a phase line cable, and another one folder hole is as standby.
The periphery wall of plug is provided with four the support location flanges 72 protruded along core pipe portion radial direction, the internal perisporium in core pipe portion is provided with four positioning runners 122, each outboard end supporting location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber in core pipe portion.
Current transformer includes toroidal inductive body 81 and intelligent control module; In the present embodiment, web portion is provided with annular groove 131 away from a side of pressure ring, and the toroidal inductive body of current transformer and intelligent control module are fixed in annular groove. In concrete practice, current transformer also can be fixedly installed on the tube wall in core pipe portion, as long as making clamp hole be arranged in the vestibule of toroidal inductive body, namely has only to so that the vestibule of cable traverse toroidal inductive body.
Due to the traverse from toroidal inductive body vestibule of three electric power cables, three electric power cables can be carried out zero-sequence current detection by induction mode by this current transformer, for finding leakage current fault in time; Intelligent control module can send real time information to distance host by wireless transmit/receive units, provides basic data for power circuit intellectuality.
Pressure ring along preset direction rotate time, pushed the stress inclined-plane of each paw by taper electrolysis so that the pressing plate portion of each paw moves towards the center in core pipe portion, thus clamping is arranged in the electric power cable in each clamp hole.
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.
The present embodiment has following Advantageous Effects: (1) pressure ring and base tube portion connect threadably, and makes it clamp electric power cable by the taper electrolysis each paw of crimping, and its operation is comparatively laborsaving, and has good anti-loosening effect; (2) by cable clamping is arranged on center, core pipe portion so that overall gravity centre distribution is relatively reasonable, when on the overhead power line of high-altitude, is conducive to alleviating vibration.
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. the electric power zero sequence current mutual inductor of an improving clamping line strength, it is characterised in that: include a matrix, a pressure ring, a plug, a current transformer and a set of paw assembly; Matrix includes the base tube portion being provided with internal threaded regions, the core pipe portion being arranged in base tube tube chamber and for connecting fixing base tube portion and the web portion in core pipe portion; The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole includes at least three guiding slide opening; Each guiding slide opening extends radially through the tube wall in core pipe portion along core pipe portion; Paw assembly includes at least three paw; Each paw is provided with pressing plate portion and guiding traveller portion; Guiding traveller portion protrudes above formation from pressing plate portion, and the top in guiding traveller portion is provided with a stress inclined-plane; The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion; Pressure ring includes the taper electrolysis setting within it on perisporium and the external screw thread district being arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stress inclined-plane of each paw, and the external screw thread district of pressure ring and the internal threaded regions in base tube portion are adaptive; Plug is arranged in core pipe portion 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 portion, 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; Current transformer includes toroidal inductive body; Each clamp hole is respectively positioned in the vestibule of toroidal inductive body; Pressure ring rotates and is arranged on the periphery wall in core pipe portion; The inwall of pressure ring is provided with the concentric stroking junction adjacent with the slip of core pipe portion periphery wall; The periphery wall of pressure ring and the periphery wall in base tube portion are equipped with multiple binding groove; The inwall in each pressing plate portion is provided with arcuate groove; Each arcuate groove is provided with multiple puncture; Each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; Pressure ring along preset direction rotate time, pushed the stress inclined-plane of each paw by taper electrolysis so that the pressing plate portion of each paw moves towards the center in core pipe portion, thus clamping is arranged in the electric power cable in clamp hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096707.6A CN105632695A (en) | 2016-01-15 | 2016-01-15 | Electric power zero-sequence current transformer capable of improving wire clamp strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096707.6A CN105632695A (en) | 2016-01-15 | 2016-01-15 | Electric power zero-sequence current transformer capable of improving wire clamp strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105632695A true CN105632695A (en) | 2016-06-01 |
Family
ID=56047511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610096707.6A Withdrawn CN105632695A (en) | 2016-01-15 | 2016-01-15 | Electric power zero-sequence current transformer capable of improving wire clamp strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105632695A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN201036156Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Current mutual inductor with connection 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 CN201610096707.6A patent/CN105632695A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN201036156Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Current mutual inductor with connection 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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| Date | Code | Title | Description |
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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: 20160601 |
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| WW01 | Invention patent application withdrawn after publication |