CN106024284A - Novel zero sequence current transformer applicable to overhead line - Google Patents
Novel zero sequence current transformer applicable to overhead line Download PDFInfo
- Publication number
- CN106024284A CN106024284A CN201610280057.0A CN201610280057A CN106024284A CN 106024284 A CN106024284 A CN 106024284A CN 201610280057 A CN201610280057 A CN 201610280057A CN 106024284 A CN106024284 A CN 106024284A
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- Prior art keywords
- clamp
- base tube
- stem
- heat
- current transformer
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/04—Arrangements or devices for relieving mechanical tension
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a novel zero sequence current transformer applicable to an overhead line. The current transformer comprises a base tube, a core column, a bolt, a current transformer body and a clamping plate assembly, wherein the base tube comprises a tube pressing part and a plate sealing part; the plate sealing part and the tube pressing part are disposed in a relatively fixed manner; the plate sealing part is equipped with a limiting slide hole and a threading hole; at least three pressing joint bosses are disposed on the inner wall of the tube pressing part; the core column is shaped like a frustum and equipped with a top pressing slide groove and a conical pressing joint face; a center screw hole is formed in the center of the core column along the axial direction of the tube pressing part; the clamping plate assembly comprises at least three line clamping plates; each line clamping plate faces the corresponding pressing joint boss; the bolt comprises a rod body, a fastening part and an outer thread connecting part; the fastening part of the bolt is located on the outer side of the plate sealing part, and the rod body of the bolt passes through the limiting slide hole and is located in the center screw hole of the core column; the current transformer body comprises an annular induction body; each line clamping hole is located in a hole cavity of the annular induction body; and the base tube is equipped with a temperature sensing device. The current transformer disclosed by the invention has the advantages of a compact structure and good performance.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of overhead transmission line novel zero-sequence current transformer.
Background technology
The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the telegram in reply of any node in circuit
The algebraical sum of stream is equal to zero.In the case of circuit and electrical equipment are normal, the vector of each phase current is equal to zero, therefore, zero
The secondary side winding no signal output of sequence current transformer, executive component is failure to actuate.When occurring to get an electric shock or each during leak current fault
The vector of phase current is not zero, and fault current makes to produce in the iron core of zero sequence current mutual inductor magnetic flux, zero sequence current mutual inductor
Produced electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, can take accordingly according to electrical leakage quantity
Protection act.Mostly the mounting means of existing zero sequence current mutual inductor is to use flange install fixing or use bonding mode solid
Fixed, its installation site is it is generally required to reserve, so that the application of zero sequence current mutual inductor is by more restriction.
Summary of the invention
It is an object of the invention to provide a kind of overhead transmission line use being easily installed location and there is real time temperature control function
Novel zero-sequence current transformer.
The technical scheme realizing the object of the invention is: a kind of overhead transmission line novel zero-sequence current transformer, including base tube,
Stem stem, bolt, current transformer and cleat assembly；Base tube includes pressure pipe portion and shrouding portion；Shrouding portion is relatively fixed with pressure pipe portion
Arrange；Shrouding portion is provided with spacing slide opening and through wires hole；The inwall in pressure pipe portion is provided with at least three crimping boss；The shape of stem stem
For frustum, the periphery wall of stem stem is axially arranged with at least three jacking sliding groove along pressure pipe portion and as each jacking sliding groove bottom wall
Taper electrolysis；The center of stem stem is axially arranged with center screw along pressure pipe portion；Cleat assembly includes at least three clamp；
The inwall of each clamp is provided with the guiding slide unit adaptive with jacking sliding groove；Each clamp is provided with guide chute；Respectively crimp boss
It is provided with the spacing traveller by adaptive with guide chute thus spacing clamp moving direction；Clamp is just to a corresponding pressure
Connecing boss to arrange, each clamp and a corresponding crimping boss clamping form a clamp hole；Each through wires hole in shrouding portion and
The connection of a corresponding clamp hole；Bolt includes the body of rod, the fastening part being arranged on body of rod one end and is arranged on body of rod periphery wall
Male threaded joint；The fastening position of bolt is outside shrouding portion, outside the body of rod of bolt makes through the spacing slide opening in shrouding portion
Threaded joints is positioned in the center screw of stem stem；The external diameter of bolt fastening part is more than the spacing slide opening in shrouding portion；Current Mutual Inductance
Device includes toroidal inductive body；Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Spacing slide opening is arranged on shrouding portion
Center, through wires hole is uniformly arranged on the outer circumferential side of spacing hole；Guide axially arranged along pressure pipe portion of slide unit；Spacing traveller is along pressure
Pipe portion is radially arranged, and clamp moves radially along pressure pipe portion；Each slide unit that guides has the cone adaptive with stem stem jacking sliding groove
Shape outer wall, this conical outer wall substantially also serves as the inwall of clamp；When the guiding slide unit of each clamp is positioned at stem stem jacking sliding
Time in groove, the outer wall of this clamp is parallel with the inwall of crimping boss；Swivel bolt pulls stem stem towards the side close to shrouding portion
To movement；Stem stem pushes the guiding slide unit of each clamp by the taper electrolysis in each jacking sliding groove, and then promotes each clamp
Plate makes its being moved radially outward along pressure pipe portion, thus clamping is positioned at the electric power cable in clamp hole；Base tube is provided with along base tube footpath
To the installation screw running through pressure pipe portion wall body；This installation screw is fixed with temperature sensing device；Temperature sensing device includes
Have the metal shell of storage tank, the temperature sensor being arranged in storage tank, for temperature sensor is crimped on storage tank
Spring on diapire and the screwed pipe plug for limit spring；Temperature sensor includes using heat conductive insulating elastomeric material to make
Heat-conducting block, the thermo-sensitive resistor being arranged in heat-conducting block, be arranged on heat-conducting block two connect electric mortiser post；Heat-conducting block can be at metal-back
The storage tank of body reciprocatingly slides；Heat-conducting block is away between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
Enclosing formation cannelure, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；Screwed pipe
The center of plug is provided with tube chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is close in base tube
One end of mandrel line is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of base tube central axis；Heat conduction
Two on block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
In such scheme, metal shell is provided with as puncturing the heat conduction boss used close to one end of base tube central axis,
Metal shell is provided with interior hexagonal away from one end of base tube central axis and twists groove；The periphery wall of metal shell is provided with and installs spiral shell
The external screw thread that hole is adaptive, the internal perisporium of storage tank is provided with internal threaded regions；Heat conduction boss is close to base tube center from metal shell
The sharp tooth boss formed is protruded in one end of axis.
In such scheme, heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electricity
Inserting column protrudes and is arranged on the heat-conducting block other end away from base tube central axis.
In such scheme, screwed pipe plug is provided with external screw thread district close to the periphery wall of one end of base tube central axis, and this is outer
The internal threaded regions of threaded area and metal shell is adaptive；Outside screwed pipe plug is provided with away from the periphery wall of one end of base tube central axis
Hexagonal twists portion.
The present invention has a positive effect: the zero sequence current mutual inductor of (1) present invention owing to carrying press claw type retaining mechanism,
Need not reserved installation position, it is easy to install.(2) structure more compact and reasonable；Stem stem and bolt connect threadably, and pass through
The taper electrolysis of jacking sliding groove crimps each clamp makes it clamp electric power cable, and its operation is the most laborsaving.(3) in anticreep wedge shape
Under the engagement locking of tooth and anticreep tooth, also there is preferable anti-loosening effect.(4) pressure is extended radially through owing to base tube is provided with along base tube
The installation screw of pipe portion wall body, is fixed with temperature sensing device in installation screw；So the present invention also has real time temperature prison
Control function.
Accompanying drawing explanation
Fig. 1 is that the one of the first structure of the present invention partly cuts open structural representation；
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 perspective view when another angle is observed of the 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 faces structural representation；
Fig. 5 is the A-A sectional view of Fig. 4；
Fig. 6 is a kind of perspective view of base tube in zero sequence current mutual inductor shown in Fig. 2；
Fig. 7 is that shown in Fig. 6, the one of base tube partly cuts open structural representation；
Fig. 8 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 9 is a kind of explosive view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 2；
Figure 10 is that the one of the second structure of the present invention partly cuts open structural representation；
Figure 11 is the close-up schematic view in Figure 10 at B；
Figure 12 is that the one after zero sequence current mutual inductor shown in Figure 10 removes current transformer partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of overhead transmission line zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 9, including base tube 1, stem stem 2, spiral shell
Bolt 3, current transformer 7 and cleat assembly 4；Described base tube 1, stem stem 2 and cleat assembly 4 are all adopted and are made from an insulative material.
Base tube 1 includes pressure pipe portion 11 and is positioned at the shrouding portion 12 of one end, pressure pipe portion；The shape in pressure pipe portion is circular, pressure pipe portion
Inwall be provided with crimping boss 13, crimping boss inwall be provided with arcuate groove 14.Base tube is made into integration, and crimping boss is from pressure
Projecting radially inwards formation on the inwall in pipe portion, crimping boss axially penetrates through the inwall in pressure pipe portion along pressure pipe portion.
In the present embodiment, pressure pipe portion is provided with four crimping boss, and these four crimping boss are uniform along the circumference in pressure pipe portion
It is distributed on the inwall in pressure pipe portion.
The two side of each crimping boss is provided with two spacing travellers 15 protruded towards center, pressure pipe portion, spacing traveller edge
Pressure pipe portion is radially arranged.
Shrouding portion 12 is provided with through wires hole 16 and spacing slide opening 17；
In the present embodiment, shrouding portion is provided with a spacing slide opening and four through wires holes；Spacing slide opening is arranged on the center in shrouding portion
Place, through wires hole is uniformly arranged on the outer circumferential side of spacing hole.
Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with along pressure pipe portion four jacking sliding grooves 21, respectively pushes up
Pressure chute is additionally provided with multiple anticreep chisel teeth 22；The center of stem stem is axially arranged with center screw 23 along pressure pipe portion.Respectively push up pressure
The diapire of chute is as taper electrolysis 211.
Cleat assembly includes four clamps 41；The inwall of each clamp is provided with the guiding slide unit adaptive with jacking sliding groove
411, guide axially arranged along pressure pipe portion of slide unit；The outer wall of each clamp is provided with arc clip slot 412, the both sides of each clamp
Guide chute 413 it is additionally provided with on wall；The spacing traveller of each crimping boss is positioned in a corresponding guide chute so that clamp edge
Spacing traveller direction is moved；In the present embodiment, each spacing traveller being radially arranged along pressure pipe portion, therefore clamp is only along pressure pipe
The radial direction in portion moves back and forth.
In the present embodiment, the two side of each clamp is axially respectively arranged at the two ends with a positive stop lug boss 417, these two limits
Position boss clamping forms described guide chute 413.
In the present embodiment, each slide unit that guides has the taper stress surface adaptive with stem stem jacking sliding groove bottom wall, and this taper is subject to
Power face substantially also serves as the inwall 414 of clamp；When the guiding slide unit of each clamp is positioned in stem stem jacking sliding groove, clamp
The outer wall 415 of plate is parallel with the inwall 131 of a corresponding crimping boss；A corresponding crimping boss is just arranged by each clamp,
Each arc clip slot and a corresponding arcuate groove clamping form a clamp hole 5, and the present embodiment forms four clamp holes altogether；Shrouding portion
On each through wires hole the most corresponding clamp hole is arranged.
Stem stem is under the spacing mating reaction guiding slide unit of its jacking sliding groove and clamp, it is impossible in the transfer of pressure pipe portion
Dynamic, only along moving axially of pressure pipe portion.
The inwall 414 of each conical outer wall guiding slide unit namely clamp is provided with multiple anticreep tooth 416, and each anticreep tooth is used
Engage in the anticreep chisel teeth with stem stem, anti-skidding anti-retrogression.
Current transformer includes toroidal inductive body 71 and intelligent control module 72；In the present embodiment, intelligent control module
72 make and have the ring-type of onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are side by side
Combination is set and forms annular, on the overall sheathed outer wall being fixed on base tube of current transformer.In concrete practice, as long as making institute
There is clamp hole to be positioned in the vestibule of toroidal inductive body, namely have only to so that cable passes the vestibule of toroidal inductive body
?.
The present embodiment has four clamp holes, but in concrete practice, can only three electric power cables of clamping, unnecessary one
Clamp hole is standby or is used for clamping other auxiliary wire rod；During three electric power cables of clamping, toroidal inductive body may be used for sense
Answer zero sequence current signal, find leak current fault in time, now can use as an overhead transmission line zero sequence current mutual inductor.
In concrete practice, it is possible to the present embodiment is made the structure only with three clamp holes.
Intelligent control module includes wireless transmit/receive units, and intelligent control module is by wireless transmit/receive units toroidal inductive originally
The current signal that body senses sends distance host to, to realize accurate long-range no worker monitor.
Bolt includes that the body of rod 31, the fastening part 32 being arranged on body of rod one end and the external screw thread being arranged on body of rod periphery wall connect
Meet portion 33；The fastening position of bolt is outside shrouding portion, and the body of rod of bolt makes external screw thread even through the spacing slide opening in shrouding portion
The portion of connecing is positioned in the center screw of stem stem；The external diameter of bolt fastening part is more than the spacing slide opening in shrouding portion.
Swivel bolt pulls stem stem to move towards the direction close to shrouding portion；Stem stem is crimped by the taper in jacking sliding groove
Face pushes the guiding slide unit of each clamp, and then promotes each clamp to make its being moved radially outward along pressure pipe portion, thus clamps
It is positioned at the electric power cable in 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；Concrete next
Saying, each puncture is along the radially protruding 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 may be used without alternate manner and makes；In each arcuate groove, such as it is provided with multiple installation draw-in groove, then adopting
The puncture sheet being made from an insulative material is inlaid in corresponding one and installs in draw-in groove；Puncture sheet and include installation portion and thorn blade, install
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 use respectively
The mode being threaded in arc clip slot and arcuate groove, also can improving clamping sigma compactness energy.
The present embodiment has following Advantageous Effects: (1) operation is the most laborsaving, has preferable anti-loosening effect.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Figure 10 to Figure 12, and base tube 1 is provided with along base tube footpath
To the installation screw 18 running through pressure pipe portion 11 wall body；This installation screw is fixed with temperature sensing device 8；
Temperature sensing device includes the metal shell 81 with storage tank 811 that metal material makes, is arranged in storage tank
Temperature sensor 82, block up for spring 83, the screwed pipe that is used for limit spring that temperature sensor is crimped on storage tank diapire
84；
Metal shell is provided with as puncturing the heat conduction boss 813 used close to one end 812 of base tube central axis, and metal shell is remote
It is provided with interior hexagonal from one end 814 of base tube central axis and twists groove 815；The periphery wall of metal shell is provided with fits with installation screw
The external screw thread 816 joined, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to base tube from metal shell
The sharp tooth boss formed is protruded in one end 812 of mandrel line；
Temperature sensor includes that the heat-conducting block 821 using heat conductive insulating elastomeric material to make, the U-shaped that is arranged in heat-conducting block are temperature sensitive
Resistance 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；
Heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser post protrusion and are arranged on heat-conducting block
On the other end away from base tube central axis；
Heat-conducting block is away from enclosing formation cannelure between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of base tube central axis, this external screw thread district and metal
The internal threaded regions 817 of housing is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central axis and twists
Portion 842；The center of screwed pipe plug is provided with tube chamber 843；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；
Spring is connected on heat-conducting block close to one end of base tube central axis, and spring abuts away from the other end of base tube central axis
On screwed pipe plug；On heat-conducting block two connect electric mortiser post and are positioned in the tube chamber 843 of screwed pipe plug.
The internal perisporium of intelligent control module 72 is provided with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket inserts corresponding one and connects in electric bushing, so that temperature sensor is connected with the middle control circuit in intelligent control module.
This structure has the following advantages, owing to metal shell is easily deformed when extruding cable, and extrusion temperature sensor
Heat-conducting block, if heat-conducting block does not has mobile space, then easily pressurized deformation damages；The present embodiment, can by arranging spring
Heat-conducting block is crimped on the diapire of metal shell storage tank so that it is can correctly predict cable and junction, base tube pressure pipe portion
Real time temperature；Can also be when, after metal shell compressive deformation, reserving mobile space to heat-conducting block, thus prevent heat-conducting block by pressurized
Damage；This structure has preferably Practical Performance.
In concrete practice, multiple installation screw and multiple temperature sensing device can be set on base tube, for often
One cable and the temperature with junction, base tube pressure pipe portion monitor in real time, thus realize the further intelligence that power network monitoring runs
Energyization.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.And these
Belong to obvious change that the connotation of the present invention extended out or variation still falls within protection scope of the present invention.
Claims (4)
1. an overhead transmission line novel zero-sequence current transformer, it is characterised in that: include base tube, stem stem, bolt, Current Mutual Inductance
Device and cleat assembly；Base tube includes pressure pipe portion and shrouding portion；Shrouding portion and pressure pipe portion are relatively fixed setting；Shrouding portion is provided with spacing
Slide opening and through wires hole；The inwall in pressure pipe portion is provided with at least three crimping boss；Stem stem be shaped as frustum, the periphery of stem stem
It is axially arranged with at least three jacking sliding groove and the taper electrolysis as each jacking sliding groove bottom wall along pressure pipe portion on wall；Stem stem
Center is axially arranged with center screw along pressure pipe portion；Cleat assembly includes at least three clamp；The inwall of each clamp is provided with
The guiding slide unit adaptive with jacking sliding groove；Each clamp is provided with guide chute；Each crimping boss is provided with by sliding with guiding
Groove is adaptive thus the spacing traveller of spacing clamp moving direction；A corresponding crimping boss is just arranged by clamp, each clamp
Plate and a corresponding crimping boss clamping form a clamp hole；Each through wires hole and a corresponding clamp hole in shrouding portion connect
Logical；Bolt includes the body of rod, the fastening part being arranged on body of rod one end and the male threaded joint being arranged on body of rod periphery wall；Bolt
Fastening position outside shrouding portion, the body of rod of bolt makes male threaded joint be positioned at stem stem through the spacing slide opening in shrouding portion
Center screw in；The external diameter of bolt fastening part is more than the spacing slide opening in shrouding portion；Current transformer includes toroidal inductive body；
Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Spacing slide opening is arranged on the center in shrouding portion, and through wires hole uniformly sets
Put the outer circumferential side at spacing hole；Guide axially arranged along pressure pipe portion of slide unit；Spacing traveller is radially arranged along pressure pipe portion, clamp
Plate moves radially along pressure pipe portion；Each slide unit that guides has the conical outer wall adaptive with stem stem jacking sliding groove, and this conical outer wall is real
The inwall of clamp is also served as in matter；When the guiding slide unit of each clamp is positioned in stem stem jacking sliding groove, outside this clamp
Wall is parallel with the inwall of crimping boss；Swivel bolt pulls stem stem to move towards the direction close to shrouding portion；Stem stem passes through each top
Taper electrolysis in pressure chute pushes the guiding slide unit of each clamp, and then promotes each clamp to make it along the radial direction in pressure pipe portion
It is displaced outwardly, thus clamping is positioned at the electric power cable in clamp hole；Base tube is provided with the peace extending radially through pressure pipe portion wall body along base tube
Dress screw；This installation screw is fixed with temperature sensing device；Temperature sensing device include having storage tank metal shell,
The temperature sensor that is arranged in storage tank, for temperature sensor being crimped on the spring on storage tank diapire and being used for spacing
The screwed pipe plug of spring；Temperature sensor includes the heat-conducting block using heat conductive insulating elastomeric material to make, is arranged in heat-conducting block
Thermo-sensitive resistor, be arranged on heat-conducting block two connect electric mortiser post；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；
Heat-conducting block is away from enclosing formation cannelure, spring position between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
In this cannelure and be set on heat-conducting block one end away from base tube central axis；The center of screwed pipe plug is provided with tube chamber；
Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is connected to heat conduction close to one end of base tube central axis
On block, spring is connected on screwed pipe plug away from the other end of base tube central axis；On heat-conducting block two connect electric mortiser post and are positioned at
In the tube chamber of screwed pipe plug.
Overhead transmission line novel zero-sequence current transformer the most according to claim 1, it is characterised in that: metal shell is close
One end of base tube central axis is provided with as puncturing the heat conduction boss used, and metal shell sets away from one end of base tube central axis
Interior hexagonal is had to twist groove；The periphery wall of metal shell is provided with the external screw thread adaptive with installation screw, on the internal perisporium of storage tank
It is provided with internal threaded regions；Heat conduction boss is to protrude the sharp tooth boss formed close to one end of base tube central axis from metal shell.
Overhead transmission line novel zero-sequence current transformer the most according to claim 2, it is characterised in that: heat-conducting block is close to base
One end of tube hub axis is connected on the diapire of storage tank；Two connect electric mortiser post protrusion and are arranged on heat-conducting block away from base tube center
On the other end of axis.
Overhead transmission line novel zero-sequence current transformer the most according to claim 3, it is characterised in that: screwed pipe plug is close
The periphery wall of one end of base tube central axis is provided with external screw thread district, and the internal threaded regions of this external screw thread district and metal shell is adaptive；
Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central axis and twists portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280057.0A CN106024284A (en) | 2016-05-02 | 2016-05-02 | Novel zero sequence current transformer applicable to overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280057.0A CN106024284A (en) | 2016-05-02 | 2016-05-02 | Novel zero sequence current transformer applicable to overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106024284A true CN106024284A (en) | 2016-10-12 |
Family
ID=57081583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610280057.0A Withdrawn CN106024284A (en) | 2016-05-02 | 2016-05-02 | Novel zero sequence current transformer applicable to overhead line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106024284A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| 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
- 2016-05-02 CN CN201610280057.0A patent/CN106024284A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| 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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Application publication date: 20161012 |
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| WW01 | Invention patent application withdrawn after publication |