CN106024292A - Intelligent zero sequence current transformer with high line clamping intensity - Google Patents

Intelligent zero sequence current transformer with high line clamping intensity Download PDF

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Publication number
CN106024292A
CN106024292A CN201610286362.0A CN201610286362A CN106024292A CN 106024292 A CN106024292 A CN 106024292A CN 201610286362 A CN201610286362 A CN 201610286362A CN 106024292 A CN106024292 A CN 106024292A
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CN
China
Prior art keywords
base tube
heat
central axis
conducting block
boss
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Withdrawn
Application number
CN201610286362.0A
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Chinese (zh)
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不公告发明人
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to CN201610286362.0A priority Critical patent/CN106024292A/en
Publication of CN106024292A publication Critical patent/CN106024292A/en
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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
    • 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
    • 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
    • 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)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

The invention discloses an intelligent zero sequence current transformer with high line clamping intensity. The current transformer comprises a base tube, a core tube, a pressing joint part, a current transformer body and a pressing claw assembly, wherein at least three line clamping bosses are disposed on the inner circumferential wall of the base tube; the core tube is located in the cavity of the base tube; a radial limiting slide hole is formed in the tube wall of the core tube; an inner thread area is disposed on the inner wall of the core tube; the pressing claw assembly comprises multiple pressing claws; each pressing claw comprises a pressing plate part, a guide slide block part and a drive face; the pressing joint part comprises a body, an outer thread area and a pressing joint boss, and the outer thread area of the pressing joint part is fitted with the inner thread area of the core tube; the drive face of each pressing claw is fitted with the outer circumferential wall of the pressing joint boss; 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 an installation screw hole equipped with a built-in temperature sensing device is formed in the base tube. The current transformer disclosed by the invention has a function of real-time temperature monitoring.

Description

The intelligent zero sequence current mutual inductor that a kind of clamp intensity is higher
Technical field
The invention belongs to technical field of electric power, be specifically related to the intelligent zero sequence current mutual inductance that a kind of clamp intensity is higher Device.
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 intelligent zero sequence current mutual inductor with real time temperature control function.
The technical scheme realizing the object of the invention is: the intelligent zero sequence current mutual inductor that a kind of clamp intensity is higher, bag Include a base tube, a core pipe, a crimp, a current transformer and a set of paw assembly；The internal perisporium of base tube is provided with At least three clamp boss；Core pipe is positioned in base tube tube chamber；The tube wall of core pipe is provided with one group of pilot hole, and this group pilot hole includes At least three radially spacing slide opening；The inwall of core pipe is provided with internal threaded regions；Paw assembly includes multiple paw；Each paw includes Pressing plate portion, the guide runner portion protruding formation from pressing plate portion and the drive surface being arranged on guide runner portion；Each guide runner portion Inserting on core pipe in a corresponding spacing slide opening of radial direction, each drive surface stretches in the tube chamber of core pipe, and each pressing plate portion is positioned at base tube Between inwall and core tube wall；Pressing plate portion and a corresponding clamp boss clamping of each paw form one and are used for clamping electric lines of force The clamp hole of cable；Crimp includes body, be arranged on body peripheral wall external screw thread district and be arranged on cylindrical body medial extremity On crimping boss, the internal threaded regions of the external screw thread district of crimp and core pipe is adaptive；The drive surface of each paw and crimping boss Periphery wall is adaptive；Current transformer includes toroidal inductive body；Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；
Base tube is provided with the installation screw of built-in temperature sensing device；Having that temperature sensing device includes that metal material makes is accommodating The metal shell of groove, the temperature sensor being arranged in storage tank, for temperature sensor is crimped on storage tank diapire Spring, screwed pipe plug for limit spring；Metal shell is provided with as puncturing use close to one end of base tube central axis Heat conduction boss；Metal shell is provided with interior hexagonal away from one end of base tube central axis and twists groove；Set on the periphery wall of metal shell Having the external screw thread adaptive with installation screw, the internal perisporium of storage tank is provided with internal threaded regions；Temperature sensor includes using heat conduction The heat-conducting block that insulating rubber material is made, the U-shaped thermo-sensitive resistor being arranged in heat-conducting block, be arranged on heat-conducting block two connect electricity Inserting column；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；Heat-conducting block is connected to close to one end of base tube central axis On the diapire of storage tank；Two connect electric mortiser post protrusion and are arranged on the heat-conducting block other end away from base tube central axis；Heat-conducting block Enclosing formation cannelure away between external diameter and the internal perisporium of storage tank of the other end of base tube central axis, spring is positioned at this ring In shape groove and be set on heat-conducting block one end away from base tube central axis；Screwed pipe plug is close to one end of base tube central axis Periphery wall 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 away from base tube center The periphery wall of one end of axis is provided with outer-hexagonal and twists portion；The center of screwed pipe plug is provided with tube chamber；Screwed pipe plug passes through it External screw thread district is fixedly installed in cannelure；Spring is connected on heat-conducting block close to one end of base tube central axis, spring away from The other end of base tube central axis is connected on screwed pipe plug；On heat-conducting block two connect electric mortiser post and are positioned at the tube chamber of screwed pipe plug In.
In such scheme, heat conduction boss is to protrude the sharp tooth formed close to one end of base tube central axis from metal shell Boss.
In such scheme, installation screw extends radially through clamp boss along base tube.
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, Can directly be fixedly installed on cable up, it is not necessary to reserved installation position, it is easy to install.(2) crimp and core pipe are with screw thread side Formula connects, and makes it clamp electric power cable by the taper electrolysis each paw of crimping, and its operation is the most laborsaving, and has preferably Anti-loosening effect；(3) by cable clamping is arranged at core tube hub so that overall gravity centre distribution is relatively reasonable, when with Time on the overhead power line of high-altitude, be conducive to alleviating vibration.(4) it is provided with installation screw due to base tube, fixing in installation screw It is provided with temperature sensing device；So also having real time temperature control function, promote electrical network intelligent.
Accompanying drawing explanation
Fig. 1 is that the one of the first structure of the present invention partly cuts open schematic diagram；
Fig. 2 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 3 is a kind of perspective view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 2；
Fig. 4 is a kind of front view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 5 is that shown in Fig. 2, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 6 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 7 is a kind of explosive view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 2；
Fig. 8 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 2 removes base tube and crimp；
Fig. 9 is that the one of the second structure of the present invention partly cuts open structural representation；
Figure 10 is the close-up schematic view in Fig. 9 at B；
Figure 11 is that the one of the third structure of the present invention partly cuts open structural representation；
Figure 12 is a kind of side-looking structural representation of zero sequence current mutual inductor shown in Figure 11；
Figure 13 is that the one of the 4th kind of structure of the present invention partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is the intelligent zero sequence current mutual inductor that a kind of clamp intensity is higher, as shown in Fig. 1 to Fig. 8, including one 1, core pipe of base tube, 3, current transformer 7 of 2, crimp and a set of paw assembly 9.
In the present embodiment, base tube 1, core pipe 2, crimp 3 and a set of paw assembly 9 are all adopted and are made from an insulative material.
The internal perisporium of base tube is provided with multiple clamp boss 11, and the inwall of each clamp boss is provided with arcuate groove 111, and each clamp is convex Platform and arcuate groove are all axially extending along base tube.The internal perisporium of base tube is axially additionally provided with four positioning runners 12 along base tube.
Core pipe and base tube are arranged concentrically, and core pipe is positioned in base tube tube chamber；The periphery wall of core pipe is provided with four along base tube footpath To protruding the support flange 21 extended, each outboard end supporting flange is positioned in a corresponding positioning runner, thus core pipe is propped up Support is positioned in the tube chamber of base tube；The tube wall of core pipe is provided with one group of pilot hole, and this group pilot hole includes four spacing cunnings of radial direction Hole 22, these four spacing slide openings of radial direction are evenly distributed on core tube wall along core pipe circumference；Each radially spacing slide opening is all along base tube Extend radially through core tube wall；Each radially spacing slide opening be positioned at core pipe axially on middle part, the cross section shape of each radially spacing slide opening Shape is I-shaped.The inwall of core pipe is provided with internal threaded regions 23.
In concrete practice, the cross sectional shape guiding slide opening may be used without other shape, the most circular, square, rhombus, all It is feasible.
Paw assembly 9 includes four paws 4；Each paw includes pressing plate portion 41, the inwardly projecting formation of inwall from pressing plate portion Guide runner portion 42 and the drive surface 43 that is arranged in guide runner portion；Pressing plate portion is axially extending along base tube, guide runner portion Radially extend along base tube；The outer wall in each paw pressing plate portion is provided with arc clip slot 411；Each guide runner portion inserts on core pipe corresponding In one spacing slide opening of radial direction, each drive surface stretches in the tube chamber of core pipe, and each pressing plate portion is positioned at base tube inwall and core tube wall Between；Each paw radial direction along base tube under the guide and limit effect of radially spacing slide opening reciprocatingly slides；Each guide runner portion Cross sectional shape is adaptive with radially spacing slide opening I-shaped.
A corresponding clamp boss clamping in the pressing plate portion of each paw and base tube forms one and is used for clamping electric power cable Clamp hole 5；In the present embodiment, the arc clip slot in each pressing plate portion and the arcuate groove clamping of a corresponding clamp boss are formed and are used for The clamp hole 5 of clamping electric power cable.
The present embodiment forms four clamp holes altogether, can clamp four electric power cables；But as zero sequence current mutual inductor During use, only three phase line cables of gripping.In concrete practice, it is possible to the present embodiment is made the knot only with three clamp holes Structure.
Crimp 3 includes cylindrical body 31, be arranged on cylindrical body periphery wall external screw thread district 32, be arranged on column this The fastening part 33 of external side and the crimping boss 34 being arranged on cylindrical body medial extremity, crimp boss is shaped as the frustum of a cone Shape；The external screw thread district of crimp and the internal threaded regions of core pipe are adaptive；Crimping axially extending along base tube of boss, and it is positioned at core pipe pipe In chamber.
In the present embodiment, the drive surface of each paw is one and the curved surface of crimping boss periphery wall adaptation, at concrete practice In, this drive surface also can be selected for inclined-plane.
In the present embodiment, in paw assembly, the quantity of paw is identical with the quantity guiding slide opening in each group of pilot hole, and at least Three.
Current transformer includes toroidal inductive body 71 and intelligent control module 72；In the present embodiment, intelligent control module 72 make and have an onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are arranged side by side group Close and form annular, on the overall sheathed periphery wall being fixed on base tube of current transformer.In concrete practice, current transformer also may be used It is fixedly installed on the tube wall of core pipe, as long as making all clamp holes be positioned in the vestibule of toroidal inductive body, namely only It is required that cable is through the vestibule of toroidal inductive body.
Intelligent control module can include wireless transmit/receive units, and intelligent control module passes through wireless transmit/receive units circular base The leakage current signal that pipe senses sends distance host to, with the long-range no worker monitor that realization is accurate, finds electric leakage event in time Barrier.
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.
Crimp along preset direction rotate time, drive crimping boss to rotate in core pipe tube chamber traveling, press Connect boss and promote each paw by pushing each drive surface so that each pressing plate portion is moved radially outward along core pipe, thus clamping is positioned at Electric power cable in each clamp hole.
The present embodiment has following Advantageous Effects: (1) crimp and core pipe connect threadably, and by crimping Boss pushes the drive surface of each paw, and then promotes each paw to move along core pipe radial direction；Its operation is the most laborsaving, and tool There is preferable anti-loosening effect.
The present embodiment can use as a zero sequence current mutual inductor.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Fig. 9 and Figure 10, and base tube 1 is provided with along base tube footpath To the installation screw 18 running through clamp boss 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.
In the present embodiment, the internal perisporium of intelligent control module 72 is provided with inwardly projecting two and connects electric bushing (on figure not Draw), each electrical connector socket inserts corresponding one and connects in electric bushing, so that in temperature sensor and intelligent control module Control circuit is connected.
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 base tube clamp boss junction Real time temperature；Can also be when, after metal shell compressive deformation, reserving mobile space to heat-conducting block, thus prevent heat-conducting block to be subject to Crushing is bad；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 base tube clamp boss junction monitor in real time, thus realize the further of power network monitoring operation Intelligent.
(embodiment 3)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Figure 11 to Figure 12, in the present embodiment, and annular sense Sexuality is answered on the sheathed periphery wall being fixed on base tube of body；The periphery wall of base tube is provided with the routing hole extending radially through tube wall 13；Base tube inwall, core tube wall, clamp boss, support between flange, paw pressing plate portion clamping form multiple containing cavity 73, intelligence Energy control module is arranged in containing cavity；Electric connection line between toroidal inductive body and intelligent control module passes described wiring Hole.This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
(embodiment 4)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Figure 13, and base tube 1 is provided with and extends radially through along base tube The installation screw 18 of clamp boss 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 on storage tank In temperature sensor 82, the spring 83 for temperature sensor is crimped on storage tank diapire, the spiral shell that is used for limit spring Pipe plug 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.
In the present embodiment, the internal perisporium of intelligent control module 72 is provided with inwardly projecting two and connects electric bushing (on figure not Draw), each electrical connector socket inserts corresponding one and connects in electric bushing, so that in temperature sensor and intelligent control module Control circuit is connected.
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 base tube clamp boss junction Real time temperature；Can also be when, after metal shell compressive deformation, reserving mobile space to heat-conducting block, thus prevent heat-conducting block to be subject to Crushing is bad；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 base tube clamp boss junction monitor in real time, thus realize the further of power network monitoring operation Intelligent.
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 (3)

1. the intelligent zero sequence current mutual inductor that a clamp intensity is higher, it is characterised in that: include a base tube, a core Pipe, a crimp, a current transformer and a set of paw assembly；The internal perisporium of base tube is provided with at least three clamp boss； Core pipe is positioned in base tube tube chamber；The tube wall of core pipe is provided with one group of pilot hole, and this group pilot hole includes that at least three is the most spacing Slide opening；The inwall of core pipe is provided with internal threaded regions；Paw assembly includes multiple paw；Each paw includes pressing plate portion, from pressing plate portion Protrude the guide runner portion formed and the drive surface being arranged in guide runner portion；Each guide runner portion inserts on core pipe corresponding one In the spacing slide opening of individual radial direction, each drive surface stretches in the tube chamber of core pipe, each pressing plate portion be positioned at base tube inwall and core tube wall it Between；Pressing plate portion and a corresponding clamp boss clamping of each paw form one for the clamp hole clamping electric power cable；Crimping Part includes body, be arranged on body peripheral wall external screw thread district and the crimping boss being arranged on cylindrical body medial extremity, pressure The external screw thread district of fitting and the internal threaded regions of core pipe are adaptive；The periphery wall of the drive surface of each paw and crimping boss is adaptive；Electric current Transformer includes toroidal inductive body；Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Base tube is provided with built-in temperature and passes The installation screw of induction device；Temperature sensing device includes the metal shell with storage tank that metal material makes, is arranged on appearance Put the temperature sensor in groove, for spring temperature sensor being crimped on storage tank diapire, the spiral shell that is used for limit spring Pipe plug；Metal shell is provided with as puncturing the heat conduction boss used close to one end of base tube central axis；Metal shell away from One end of base tube central axis is provided with interior hexagonal and twists groove；The periphery wall of metal shell is provided with the outer spiral shell adaptive with installation screw Stricture of vagina, the internal perisporium of storage tank is provided with internal threaded regions；Temperature sensor includes the heat conduction using heat conductive insulating elastomeric material to make Block, the U-shaped 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 connected on the diapire of storage tank close to one end of base tube central axis；Two connect Electric mortiser post protrudes and is arranged on the heat-conducting block other end away from base tube central axis；Heat-conducting block is away from another of base tube central axis Enclosing formation cannelure between external diameter and the internal perisporium of storage tank of end, spring is positioned in this cannelure and to be set in heat-conducting block remote On one end of base tube central axis；Screwed pipe plug is provided with external screw thread district close to the periphery wall of one end of base tube central axis, The internal threaded regions of this external screw thread district and metal shell is adaptive；Screwed pipe plug sets on the periphery wall away from one end of base tube central axis Outer-hexagonal is had to twist portion；The center of screwed pipe plug is provided with tube chamber；Screwed pipe plug is fixedly installed on annular by its external screw thread district In groove；Spring is connected on heat-conducting block close to one end of base tube central axis, and spring supports away from the other end of base tube central axis It is connected on screwed pipe plug；Two on heat-conducting block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
The intelligent zero sequence current mutual inductor that clamp intensity the most according to claim 1 is higher, it is characterised in that: heat conduction is convex Platform is to protrude the sharp tooth boss formed close to one end of base tube central axis from metal shell.
The intelligent zero sequence current mutual inductor that clamp intensity the most according to claim 1 is higher, it is characterised in that: spiral shell is installed Hole extends radially through clamp boss along base tube.
CN201610286362.0A 2016-05-02 2016-05-02 Intelligent zero sequence current transformer with high line clamping intensity Withdrawn CN106024292A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319448A2 (en) * 2001-12-11 2003-06-18 Mario Fabris Two stage clamping pinion
CN201815694U (en) * 2010-09-28 2011-05-04 中国一拖集团有限公司 End surface positioning expanding mandrel for involute internal spline
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319448A2 (en) * 2001-12-11 2003-06-18 Mario Fabris Two stage clamping pinion
CN201815694U (en) * 2010-09-28 2011-05-04 中国一拖集团有限公司 End surface positioning expanding mandrel for involute internal spline
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