CN105761894A - Three-phase zero-sequence current transformer with good anti-loosening performance - Google Patents
Three-phase zero-sequence current transformer with good anti-loosening performance Download PDFInfo
- Publication number
- CN105761894A CN105761894A CN201610098841.XA CN201610098841A CN105761894A CN 105761894 A CN105761894 A CN 105761894A CN 201610098841 A CN201610098841 A CN 201610098841A CN 105761894 A CN105761894 A CN 105761894A
- Authority
- CN
- China
- Prior art keywords
- paw
- plate portion
- pressing
- core pipe
- core tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- 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
- H01F38/38—Instruments transformers for polyphase ac
-
- 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
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
Abstract
The invention discloses a three-phase zero-sequence current transformer with good anti-loosening performance.The three-phase zero-sequence current transformer comprises a pressing ring, a core tube, a core rod, a current transformer body and a pressing claw assembly.Three radial guiding holes are formed in the wall of the core tube.The pressing claw assembly comprises three pressing claws.Each pressing claw is provided with a pressing plate portion, a guiding sliding block portion and a transmission plate portion, each pressing plate portion is located inside a cavity of the core tube, each pressing claw slides along the corresponding radial guiding hole in a reciprocating mode, the pressing ring is arranged on the peripheral wall of the core tube in a rotating mode, three spiral grooves are formed in the side end, adjacent to the corresponding guiding sliding block portion of each pressing claw, of the pressing ring, the transmission plate portion of each pressing claw is located inside the corresponding spiral groove, the current transformer body comprises an annular basic body, and wire clamping holes are located inside a hole of the annular basic body; the core rod is located inside the cavity of the core tube; three arc-shaped clamping grooves are formed in the peripheral wall of the core rod, and each arc-shaped clamping groove and a corresponding arc-shaped groove are clamped to form one wire clamping hole; when the pressing ring rotates, the corresponding pressing claws are pushed to slide to the center of the core tube.Good performance is achieved.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of three-phase zero sequence current mutual inductor with preferably anti-loosening performance.
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 three-phase 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 three-phase zero sequence current mutual inductor, and electric current produced by three-phase 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 three-phase 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 three-phase 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 three-phase zero sequence current mutual inductor with preferably anti-loosening performance of better firmness.
The technical scheme realizing the object of the invention is: a kind of three-phase zero sequence current mutual inductor with preferably anti-loosening performance, including a pressure ring, a core pipe, a plug, a current transformer and a set of paw assembly；Core tube wall is provided with three radially-directed holes；Paw assembly includes 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 arcuate groove；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 pressure ring and three guide runner portions in paw assembly are provided adjacent to；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 includes 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 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；Each radially-directed hole includes the guiding slide opening and the anticreep slide opening that axially set gradually along core pipe；Guiding slide opening is arranged on the core pipe edge away from a side of axial back-up ring, and anticreep slide opening connects with guiding slide opening；Each guide runner portion includes guide part and anti-delinking part, 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；Each arcuate groove and arc clip slot are provided with multiple puncture；Each paw is the integral piece made by casting forming, and each puncture is made when casting forming；Extruded the driver plate portion of a corresponding paw when pressure ring rotates by each helicla flute, and then promote corresponding paw to slide towards core tube hub.
The present invention has positive effect: the three-phase 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 good anti-loosening effect, firm intensity is relatively high and stable reliably.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the present invention；
Fig. 2 is a kind of perspective view after three-phase zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 3 be three-phase zero sequence current mutual inductor shown in Fig. 2 from another angle observe time a kind of perspective view；
Fig. 4 is a kind of front view of three-phase zero sequence current mutual inductor shown in Fig. 2；
Fig. 5 is that shown in Fig. 2, the one of three-phase zero sequence current mutual inductor partly cuts open structural representation；
Fig. 6 is a kind of explosive view of three-phase zero sequence current mutual inductor shown in Fig. 2；
Fig. 7 be three-phase zero sequence current mutual inductor shown in Fig. 2 from another angle observe time a kind of explosive view；
Fig. 8 is a kind of explosive view after three-phase zero sequence current mutual inductor shown in Fig. 2 removes pressure ring and back-up ring；
Fig. 9 be after three-phase zero sequence current mutual inductor shown in Fig. 2 removes pressure ring and back-up ring from another angle observe time a kind of explosive view.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of three-phase zero sequence current mutual inductor with preferably anti-loosening performance, sees shown in Fig. 1 to Fig. 9, including 1, core pipe 2 of a pressure ring, a set of paw assembly 7, current transformer 8 of 3, plug 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 insulant 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, and core tube wall has been uniformly distributed circumferentially three radially-directed holes 23；In the present embodiment, each radially-directed hole extends radially through core tube wall along core pipe.Axial back-up ring is arranged in the annular groove of core pipe.
Each radially-directed hole 23 includes the guiding slide opening 231 and the anticreep slide opening 232 that axially set gradually along core pipe；Guiding slide opening is arranged on the core pipe edge away from a side of axial back-up ring, and anticreep slide opening connects with guiding slide opening；The radial cross-sectional shape in each radially-directed hole is T-shaped；Each radially-directed hole 23 forms a breach being positioned at core tube edges place；In the present embodiment, each radially-directed hole extends radially through gear platform 21 along core pipe.
Paw assembly includes three paws 5；Each paw is provided with pressing plate portion 51, along the guide runner portion 52 that core pipe radially extends and the driver plate portion 53 that is arranged in guide runner portion；The driver plate portion of each paw is provided in the flange axially projecting along core pipe 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 includes 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 adaptive with radially-directed hole T-shaped.Each paw is 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 arcuate groove 55.
Pressure ring 1 rotates and is arranged on the periphery wall of core pipe, and at gear platform with axially between back-up ring；The internal perisporium of pressure ring is the smooth inner wall adjacent with the slip of 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 includes the anticreep district 121 that connects with pressure ring vestibule 13 and the accommodating 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；Accommodating area is smooth chute；The present embodiment, when operation, adopts the binding groove that hook type spanner catches on pressure ring to twist 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 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 61；So the present embodiment can form three clamp holes, can be used for simultaneously clamping on three 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 core pipe.
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.
Current transformer includes 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 include wireless transmit/receive units, and the zero sequence current signal that intelligent control module is sensed annular matrix by wireless transmit/receive units sends distance host to, to realize the long-range no worker monitor of precision；This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
In concrete practice, this current transformer could be secured on other position, as long as making 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 so that a corresponding driver plate portion is from being positioned at accommodating area to being positioned at anticreep district, namely this driver plate portion is produced squeezing action；Pressure ring synchronizes to drive three paws by three helicla flutes so that each pressing plate portion is 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, so that the present embodiment has good anti-loosening effect.
The present embodiment is by being arranged on cable clamping at the longitudinal center line place of 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, it is possible to 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, be effectively ensured the reliability of long-term work.
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. a three-phase zero sequence current mutual inductor with preferably anti-loosening performance, it is characterised in that: include a pressure ring, a core pipe, a plug, a current transformer and a set of paw assembly；Core tube wall is provided with three radially-directed holes；Paw assembly includes 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 arcuate groove；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 pressure ring and three guide runner portions in paw assembly are provided adjacent to；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 includes 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 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；Each radially-directed hole includes the guiding slide opening and the anticreep slide opening that axially set gradually along core pipe；Guiding slide opening is arranged on the core pipe edge away from a side of axial back-up ring, and anticreep slide opening connects with guiding slide opening；Each guide runner portion includes guide part and anti-delinking part, 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；Each arcuate groove and arc clip slot are provided with multiple puncture；Each paw is the integral piece made by casting forming, and each puncture is made when casting forming；Extruded the driver plate portion of a corresponding paw when pressure ring rotates by each helicla flute, and then promote corresponding paw to slide towards core tube hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098841.XA CN105761894A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero-sequence current transformer with good anti-loosening performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098841.XA CN105761894A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero-sequence current transformer with good anti-loosening performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105761894A true CN105761894A (en) | 2016-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610098841.XA Withdrawn CN105761894A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero-sequence current transformer with good anti-loosening performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105761894A (en) |
Citations (3)
| 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 |
-
2016
- 2016-01-15 CN CN201610098841.XA patent/CN105761894A/en not_active Withdrawn
Patent Citations (3)
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160713 |