CN105551760A - Zero-sequence current transformer with relatively good anti-looseness performance - Google Patents

Zero-sequence current transformer with relatively good anti-looseness performance Download PDF

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Publication number
CN105551760A
CN105551760A CN201610098792.XA CN201610098792A CN105551760A CN 105551760 A CN105551760 A CN 105551760A CN 201610098792 A CN201610098792 A CN 201610098792A CN 105551760 A CN105551760 A CN 105551760A
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CN
China
Prior art keywords
paw
core pipe
plate portion
core
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.)
Withdrawn
Application number
CN201610098792.XA
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Chinese (zh)
Inventor
胡妍
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Individual
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Individual
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Filing date
Publication date
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Priority to CN201610098792.XA priority Critical patent/CN105551760A/en
Publication of CN105551760A publication Critical patent/CN105551760A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

The invention discloses a zero-sequence current transformer with relatively good anti-looseness performance. The zero-sequence current transformer comprises a compression ring, a core tube, a core rod, a current transformer body and a press claw assembly, wherein three radial guide holes are formed in the tube wall of the core tube; the press claw assembly comprises three press claws; each press claw is provided with a press plate part, a guide slide block part and a drive plate part; the press plate parts are located in a tube cavity of the core tube; each press claw slides along one corresponding radial guide hole in a reciprocating manner; the compression ring is rotationally arranged on the outer circumference wall of the core tube; three spiral grooves are arranged at one side end, adjacent to the guide slide block parts of the press claws, of the compression ring; the drive plate part of each press claw is located in one corresponding spiral groove; the current transformer body comprises an annular base body; wire clamping holes are located in hole cavities of the annular base body; the core rod is located in the tube cavity of the core tube; three arc-shaped clamping grooves are arranged on the outer circumference wall of the core rod; each arc-shaped clamping groove and one corresponding arc-shaped groove are clamped to form one wire clamping hole; and the compression ring pushes the corresponding press claws to slide towards the center of the core tube when rotating. The zero-sequence current transformer has relatively good performance.

Description

A kind of zero sequence current mutual inductor with better anti-loosening performance
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of zero sequence current mutual inductor with better anti-loosening performance.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the algebraical sum flowing into the telegram in reply stream of any node in circuit equals zero.Under circuit and the normal situation of electric equipment, the vector of each phase current equals zero, and therefore, the secondary side winding no signal of zero sequence current mutual inductor exports, and executive component is failure to actuate.The vector of each phase current when there is electric shock or leak current fault is non-vanishing, and fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and the electric current that zero sequence current mutual inductor produces 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 generally needs to reserve, therefore makes the application of zero sequence current mutual inductor be subject to more restriction.
Summary of the invention
The object of this invention is to provide a kind of zero sequence current mutual inductor with better anti-loosening performance being convenient to install location, there is better firmness.
The first technical scheme realizing the object of the invention is: a kind of zero sequence current mutual inductor with better anti-loosening performance, comprises a pressure ring, a core pipe, plug, a current transformer and an a set of paw assembly; Core tube wall is provided with three radially-directed holes; Paw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber, and the inwall in each pressing plate portion is provided with deep-slotted chip breaker; Core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Pressure ring rotates and is arranged on the periphery wall of core pipe, and three guide runner portions in pressure ring and paw assembly are adjacent to be arranged; The side that pressure ring and each paw guide runner portion adjoin is provided with three helicla flutes; The driver plate portion of each paw is arranged in a corresponding helicla flute; Current transformer comprises annular matrix, and clamp hole is arranged in annular matrix vestibule; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; By the driver plate portion of the corresponding paw of each helicla flute extruding when pressure ring rotates, and then promote corresponding paw and slide towards core tube hub.
In such scheme, the periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, and the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
The first technical scheme realizing the object of the invention is: comprise a pressure ring, a core pipe, plug, a current transformer and an a set of paw assembly; Core tube wall is provided with three radially-directed holes; Paw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber, and the inwall in each pressing plate portion is provided with deep-slotted chip breaker; Core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Pressure ring rotates and is arranged on the periphery wall of core pipe, and three guide runner portions in pressure ring and paw assembly are adjacent to be arranged; The side that pressure ring and each paw guide runner portion adjoin is provided with three helicla flutes; The driver plate portion of each paw is arranged in a corresponding helicla flute; Current transformer comprises annular matrix and intelligent control module; Intelligent control module comprises wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to the secondary voltage signal that annular matrix senses; Clamp hole is arranged in annular matrix vestibule; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; By the driver plate portion of the corresponding paw of each helicla flute extruding when pressure ring rotates, and then promote corresponding paw and slide towards core tube hub.
In such scheme, the periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, and the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
The present invention has positive effect: (1) zero sequence current mutual inductor of the present invention, owing to carrying press claw type retaining mechanism, does not need reserved installation position, is easy to install, and has good anti-loosening effect, and firm intensity is higher and reliable and stable.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the present invention;
Fig. 2 removes a kind of perspective view after current transformer for zero sequence current mutual inductor shown in Fig. 1;
Fig. 3 is for zero sequence current mutual inductor shown in Fig. 2 is from a kind of perspective view during another angle views;
A kind of front view that Fig. 4 is zero sequence current mutual inductor shown in Fig. 2;
Fig. 5 partly cuts open structural representation for the one of zero sequence current mutual inductor shown in Fig. 2;
A kind of explosive view that Fig. 6 is zero sequence current mutual inductor shown in Fig. 2;
Fig. 7 is for zero sequence current mutual inductor shown in Fig. 2 is from a kind of explosive view during another angle views;
Fig. 8 removes a kind of explosive view after pressure ring and back-up ring for zero sequence current mutual inductor shown in Fig. 2;
Fig. 9 removes after pressure ring and back-up ring from a kind of explosive view during another angle views for zero sequence current mutual inductor shown in Fig. 2.
Embodiment
(embodiment 1)
The present embodiment is a kind of zero sequence current mutual inductor with better anti-loosening performance, sees shown in Fig. 1 to Fig. 9, comprises a pressure ring 1, core pipe 2, a set of paw assembly 3, plug 7, current transformer 8 and an axial back-up ring 4.
In the present embodiment, pressure ring 1, core pipe 2, paw assembly 3, plug 7 and axial back-up ring 4 all adopt insulating material to make.
The periphery wall of core pipe 2 is provided with the gear platform 21 of evagination and the annular groove 22 of indent, core tube wall has been uniformly distributed circumferentially three radially-directed holes 23; In the present embodiment, each radially-directed hole is along core caliber to running through core tube wall.Axial back-up ring is arranged in the annular groove of core pipe.
Each radially-directed hole 23 comprises the guiding slide opening 231 and anticreep slide opening 232 that axially set gradually along core pipe; Guiding slide opening is arranged on the edge of core pipe away from a side of axial back-up ring, and anticreep slide opening is communicated with guiding slide opening; The radial cross-sectional shape in each radially-directed hole is T-shaped; Each radially-directed hole 23 forms the breach that is positioned at core tube edges place; In the present embodiment, each radially-directed hole is along core caliber to running through gear platform 21.
Paw assembly comprises three paws 5; Each paw is provided with pressing plate portion 51, along core caliber to the guide runner portion 52 extended and the driver plate portion 53 be arranged in guide runner portion; The driver plate portion of each paw is the flange axially outstanding along core pipe be arranged in each guide runner portion, and the outboard end of this flange is provided with chisel teeth 54.
Each pressing plate portion is arranged in core pipe tube chamber, and core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each guide runner portion 52 comprises guide part 521 and anti-delinking part 522, and guide part is arranged in the guiding slide opening in a corresponding radially-directed hole, and anti-delinking part is arranged in the anticreep slide opening in a corresponding radially-directed hole; The radial cross-sectional shape of guide part and anti-delinking part is T-shaped with radially-directed hole adaptation.Each paw under the spacing of radially-directed hole and guide effect, along core caliber to reciprocatingly sliding; The inwall in each pressing plate portion is provided with deep-slotted chip breaker 55.
Pressure ring 1 rotates and is arranged on the periphery wall of core pipe, and between gear platform and axial back-up ring; The internal perisporium of pressure ring is the adjacent smooth inner wall that slides with core pipe periphery wall; The periphery wall of pressure ring is provided with multiple binding groove 11; In the present embodiment, a side of pressure ring and axial back-up ring slide adjacent, and another side of pressure ring and the guide runner portion of each paw slide adjacent; The side that pressure ring and each paw guide runner portion adjoin is provided with three helicla flutes 12; In the present embodiment, each helicla flute comprises the anticreep district 121 that is communicated with pressure ring vestibule 13 and the disposal area 122 away from pressure ring vestibule; The diapire in anticreep district is provided with multiple wedge shape anticreep tooth 123, and the chisel teeth of each wedge shape anticreep tooth and paw is adaptive; Disposal area is smooth chute; The present embodiment is when operating, and the binding groove adopting hook type spanner to catch on pressure ring twists pressure ring.
Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots 71, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole 61; So the present embodiment can form three clamp holes, can be used for clamping three cables simultaneously.
The periphery wall of plug is provided with four the supporting and location flanges 72 protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners 24, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each deep-slotted chip breaker and arc clip slot; Specifically, each puncture is protruded along the radial direction in core pipe portion.
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 also can adopt alternate manner to make; Such as in each deep-slotted chip breaker, be provided with multiple installation draw-in groove, then the puncture sheet adopting insulating material to make be inlaid in corresponding one and install in draw-in groove; Puncture sheet comprises installation portion and thorn blade, and installation portion is inlaid in be installed in draw-in groove, and thorn blade then exposes installing card groove and forms puncture.In concrete practice, can also adopt in the mode arranging screw thread in each arc clip slot and deep-slotted chip breaker, also can improving clamping sigma compactness energy.
Current transformer comprises annular matrix 81 and intelligent control module; In the present embodiment, on the sheathed periphery wall being fixed on core pipe of this current transformer.Intelligent control module can comprise wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to the zero sequence current signal that annular matrix senses, 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.
In concrete practice, this current transformer also can be fixed on other position, as long as make clamp hole be arranged in annular matrix vestibule, is all feasible.
The driver plate portion of each paw is arranged in a corresponding helicla flute; Each helicla flute rotates along with pressure ring, makes a corresponding driver plate portion from being positioned at disposal area to being positioned at anticreep district, also namely produces squeezing action to this driver plate portion; Pressure ring synchronously drives three paws by three helicla flutes, makes each pressing plate portion close to each other towards core tube hub, thus clamping is arranged in the electric power cable in clamp hole.
When the chisel teeth in each pressing plate portion is clamped on the wedge shape anticreep tooth in corresponding anticreep district, wedge shape anticreep tooth prevents pressure ring from reversing, thus makes the present embodiment have good anti-loosening effect.
The present embodiment is by being arranged on the longitudinal center line place of zero sequence current mutual inductor cable clamping, and its gravity centre distribution is comparatively reasonable, when on the overhead power line of high-altitude, is conducive to alleviating vibration; In addition, the present embodiment is positioned each paw by the slope groove with wedge shape anticreep tooth, can play the technique effect preventing from falling back, and compares with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, effectively ensure the reliability of long-term work.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not 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 exhaustive without the need to also giving all execution modes.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.

Claims (4)

1. there is a zero sequence current mutual inductor for better anti-loosening performance, it is characterized in that: comprise a pressure ring, a core pipe, plug, a current transformer and an a set of paw assembly; Core tube wall is provided with three radially-directed holes; Paw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber, and the inwall in each pressing plate portion is provided with deep-slotted chip breaker; Core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Pressure ring rotates and is arranged on the periphery wall of core pipe, and three guide runner portions in pressure ring and paw assembly are adjacent to be arranged; The side that pressure ring and each paw guide runner portion adjoin is provided with three helicla flutes; The driver plate portion of each paw is arranged in a corresponding helicla flute; Current transformer comprises annular matrix, and clamp hole is arranged in annular matrix vestibule; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; By the driver plate portion of the corresponding paw of each helicla flute extruding when pressure ring rotates, and then promote corresponding paw and slide towards core tube hub.
2. the zero sequence current mutual inductor with better anti-loosening performance according to claim 1, it is characterized in that: the periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
3. there is a zero sequence current mutual inductor for better anti-loosening performance, it is characterized in that: comprise a pressure ring, a core pipe, plug, a current transformer and an a set of paw assembly; Core tube wall is provided with three radially-directed holes; Paw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber, and the inwall in each pressing plate portion is provided with deep-slotted chip breaker; Core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Pressure ring rotates and is arranged on the periphery wall of core pipe, and three guide runner portions in pressure ring and paw assembly are adjacent to be arranged; The side that pressure ring and each paw guide runner portion adjoin is provided with three helicla flutes; The driver plate portion of each paw is arranged in a corresponding helicla flute; Current transformer comprises annular matrix and intelligent control module; Intelligent control module comprises wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to the secondary voltage signal that annular matrix senses; Clamp hole is arranged in annular matrix vestibule; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; By the driver plate portion of the corresponding paw of each helicla flute extruding when pressure ring rotates, and then promote corresponding paw and slide towards core tube hub.
4. the zero sequence current mutual inductor with better anti-loosening performance according to claim 3, it is characterized in that: the periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
CN201610098792.XA 2016-01-15 2016-01-15 Zero-sequence current transformer with relatively good anti-looseness performance Withdrawn CN105551760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610098792.XA CN105551760A (en) 2016-01-15 2016-01-15 Zero-sequence current transformer with relatively good anti-looseness performance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610098792.XA CN105551760A (en) 2016-01-15 2016-01-15 Zero-sequence current transformer with relatively good anti-looseness performance

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CN105551760A true CN105551760A (en) 2016-05-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106025606A (en) * 2016-06-27 2016-10-12 国网江苏省电力公司盐城供电公司 Electric power fitting having relatively good anti-shedding performance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2793486Y (en) * 2005-03-28 2006-07-05 郑春开 Clasp cable device
CN202917711U (en) * 2012-11-13 2013-05-01 北京振兴计量测试研究所 Fastening fixture for tail cover of electric connector
CN204276947U (en) * 2014-12-01 2015-04-22 温岭市深澳机床厂(普通合伙) Scroll chuck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2793486Y (en) * 2005-03-28 2006-07-05 郑春开 Clasp cable device
CN202917711U (en) * 2012-11-13 2013-05-01 北京振兴计量测试研究所 Fastening fixture for tail cover of electric connector
CN204276947U (en) * 2014-12-01 2015-04-22 温岭市深澳机床厂(普通合伙) Scroll chuck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106025606A (en) * 2016-06-27 2016-10-12 国网江苏省电力公司盐城供电公司 Electric power fitting having relatively good anti-shedding performance

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Application publication date: 20160504