CN106024287A - Three-phase power zero sequence current transformer capable of preventing cable loosening and separation - Google Patents
Three-phase power zero sequence current transformer capable of preventing cable loosening and separation Download PDFInfo
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- CN106024287A CN106024287A CN201610286161.0A CN201610286161A CN106024287A CN 106024287 A CN106024287 A CN 106024287A CN 201610286161 A CN201610286161 A CN 201610286161A CN 106024287 A CN106024287 A CN 106024287A
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- 238000000926 separation method Methods 0.000 title abstract 4
- 238000009434 installation Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 230000003044 adaptive effect Effects 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 230000001939 inductive effect Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 208000031481 Pathologic Constriction Diseases 0.000 claims 1
- 210000001215 vagina Anatomy 0.000 claims 1
- 210000000078 claw Anatomy 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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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 members engaging the pipe, cable or protective tubing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—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
- H01F38/38—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
- H02G7/04—Arrangements or devices for relieving mechanical tension
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—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)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a three-phase power zero sequence current transformer capable of preventing cable loosening and separation. The current transformer comprises a top pressing bolt, a core tube, a current transformer body, a pressing joint assembly and a pressing claw assembly, wherein radial guide slide holes are formed in the tube wall of the core tube; an inner thread area is disposed in the tube cavity of the core tube; the pressing joint assembly comprises multiple pressing joint parts; each pressing joint part is equipped with a pressing plate part and an anti-separation connecting part; each pressing joint part is disposed on the core tube in a dismountable manner by the anti-separation connecting part; the pressing claw assembly comprises multiple pressing claws; each pressing claw comprises a top plate part, a guide slide block part and a driving face; each guide slide block part is inserted into the corresponding radial guide slide hole; the top pressing bolt comprises a body, an outer thread area and a top pressing boss, and the top pressing boss is shaped like a cone frustum; the outer thread area of the top pressing bolt is fitted with the inner thread area of the core tube; the driving face of each pressing claw is fitted with the outer circumferential wall of the corresponding top pressing box; and an installation screw hole equipped with a built-in temperature sensing device is formed in at least one pressing joint part. The current transformer disclosed by the invention has the advantage of firm, stable and reliable installation.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of three-phase power zero sequence current mutual inductance preventing cable from getting loose
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 three-phase power zero being easily installed location and there is real time temperature control function
Sequence current transformer.
The technical scheme realizing the object of the invention is: a kind of three-phase power zero sequence current mutual inductor preventing cable from getting loose,
Including a top pressure bolt, core pipe, current transformer, a set of crimp assemblies and a set of paw assembly；The pipe of core pipe
Wall is provided with one group of pilot hole, and this group pilot hole includes at least three radially-directed slide opening；Core pipe tube chamber is provided with internal threaded regions；
Crimp assemblies includes at least three crimp；Each crimp is provided with pressing plate portion and anticreep connecting portion；Crimp is connected by anticreep
Portion is dismountable to be arranged on core pipe；Paw assembly includes at least three paw；Each paw includes top plate portion, in top plate portion
The guide runner portion of the inwardly projecting formation of wall and the drive surface being arranged in guide runner portion；Each guide runner portion inserts on core pipe
In a corresponding radially-directed slide opening, each drive surface stretches in the tube chamber of core pipe, and each top plate portion is positioned at core inside pipe wall and core pipe
Between outer wall；A corresponding crimp pressing plate portion is just arranged by the top plate portion of each paw, this top plate portion and this pressing plate portion clamping shape
Become one for the clamp hole clamping electric power cable；Crimp assemblies and paw assembly form at least three clamp hole altogether；Electric current is mutual
Sensor includes toroidal inductive body；Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Top pressure bolt includes body, setting
External screw thread district on body peripheral wall and the top belling platform being arranged on body medial extremity, that pushes up belling platform is shaped as the frustum of a cone
Shape；The external screw thread district of top pressure bolt and the internal threaded regions of core pipe are adaptive；Outside the drive surface of each paw and a corresponding top belling platform
Perisporium is adaptive；Top pressure bolt along preset direction rotate time, drive top belling platform to rotate in core pipe tube chamber traveling,
Top belling platform presses each drive surface to promote each paw by top so that each top plate portion is moved radially outward along core pipe, thus clamps position
Electric power cable in each clamp hole；
At least one crimp is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes that metal material is made
The metal shell with storage tank, the temperature sensor being arranged in storage tank, accommodating for temperature sensor is crimped on
Spring in groove bottom wall and the screwed pipe plug for limit spring；Metal shell is provided with work close to one end of core tube hub axis
For puncturing the heat conduction boss used, metal shell is provided with interior hexagonal away from one end of core tube hub axis and twists groove；Metal shell
The external screw thread that periphery wall is provided with and installation screw is adaptive, the internal perisporium of storage tank is provided with internal threaded regions；Temperature sensor
Including heat-conducting block, the U-shaped thermo-sensitive resistor being arranged in heat-conducting block using heat conductive insulating elastomeric material to make, it is arranged on heat-conducting block
On two connect electric mortiser post；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；Heat-conducting block is close to core tube hub axis
One end be connected on the diapire of storage tank；Two connect electric mortiser post and protrude and be arranged on heat-conducting block away from another of core tube hub axis
On end；Heat-conducting block encloses formation cannelure between external diameter and the internal perisporium of storage tank away from the other end of core tube hub axis,
Spring is positioned in this cannelure and is set on heat-conducting block one end away from core tube hub axis；Screwed pipe plug is close to core tube hub
The periphery wall of one end of 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
It is provided with outer-hexagonal away from the periphery wall of one end of core tube hub axis and twists portion；The center of screwed pipe plug is provided with tube chamber；Spiral shell
Pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is connected to heat-conducting block close to one end of core tube hub axis
On, spring is connected on screwed pipe plug away from the other end of core tube hub axis；On heat-conducting block two connect electric mortiser post and are positioned at spiral shell
In the tube chamber of pipe plug.
In such scheme, heat conduction boss is to protrude the sharp tooth formed close to one end of core tube hub axis from metal shell
Boss.
In such scheme, installation screw extends radially through pressing plate portion along core pipe.
The present invention has positive effect: the zero sequence current mutual inductor of (1) present invention, can be straight owing to carrying press claw type retaining mechanism
Connect and be fixedly installed on cable, it is not necessary to reserved installation position, it is easy to install.(2) top pressure bolt and core pipe connect threadably,
And making it clamp electric power cable by the taper electrolysis each paw of crimping, its operation is the most laborsaving, and has the most anti-loosening
Effect.(3) extend radially through the installation screw in pressing plate portion along core pipe owing to crimp is provided with, installation screw is fixed with temperature and passes
Induction device；So the present invention also has real time temperature control function.
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 that shown in Fig. 2, the one of zero sequence current mutual inductor faces structural representation；
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 crimp and top pressure bolt；
Fig. 9 is that the one of the second structure of the present invention partly cuts open structural representation；
Figure 10 is a kind of structural representation of zero sequence current mutual inductor shown in Fig. 9；
Figure 11 is that the one of the third structure of the present invention partly cuts open structural representation；
Figure 12 is the close-up schematic view in Figure 11 at B；
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 a kind of three-phase power zero sequence current mutual inductor preventing cable from getting loose, as shown in Fig. 1 to Fig. 8, including one
Individual top pressure 1, core pipe 2 of bolt, 3, current transformer 7 of a set of crimp assemblies and a set of paw assembly 9.
In the present embodiment, core pipe 2, crimp assemblies 3 and paw assembly 9 are all adopted and are made from an insulative material.
The tube wall of core pipe is provided with one group of pilot hole, and this group pilot hole includes four radially-directed slide openings 22, these four footpaths
It is evenly distributed on core tube wall along core pipe circumference to guiding slide opening；Each radially-directed slide opening all extends radially through core pipe along core pipe
Tube wall；Each radially-directed slide opening be positioned at core pipe axially on middle part, the cross sectional shape of each radially-directed slide opening is I-shaped.Core pipe
Tube chamber is provided with internal threaded regions 23.
Crimp assemblies 3 includes four crimps 31；Each crimp is provided with pressing plate portion 311 and anticreep connecting portion 312；Crimp
It is arranged on core pipe by anticreep connecting portion is dismountable；Pressing plate portion is axially extending along core pipe, and the inwall in pressing plate portion is provided with arc
Groove 313, the periphery wall in pressing plate portion is circular arc；Anticreep connecting portion is two the post plates protruding inwardly from formation from pressing plate portion two side ends
314, the radial cross-sectional shape of each post plate is L-shaped；In the present embodiment, two L-shaped post plates are oppositely arranged.
The inwall of a corresponding crimp is just arranged by each radially-directed slide opening.
Four groups it are provided with vertically for the anticreep chute 21 installing location crimp on the periphery wall of core pipe；Respectively organize anti-skid
Groove includes that two radial sections are the axial slides 211 of L-shaped；In the present embodiment, two adjacent axial slides are oppositely arranged；Respectively
Axial slide and a corresponding post plate are adaptive；The anticreep connecting portion of each crimp along core pipe axial direction from corresponding set of anti-skid
One side of groove slips in this group anticreep chute；In concrete practice, anticreep connecting portion can select other shape, as long as making
The anticreep connecting portion obtaining crimp can not remove along core caliber to from anticreep chute；In concrete practice, it is possible to select
Snap fit installs fixing each crimp；Multiple draw-in groove is such as set on the periphery wall of core pipe, each pressing plate is arranged inwardly
Prominent clamping support column or clamping gripper shoe, directly snap in a corresponding draw-in groove by each clamping support column or clamping gripper shoe
In, also can prevent shackle member from removing core pipe along core pipe radial direction, this structure is also feasible.
In the present embodiment, crimp is identical with the quantity of paw.
In concrete practice, the cross sectional shape of radially-directed slide opening may be used without other shape, the most circular, square, Pedicellus et Pericarpium Trapae
Shape, is all feasible.
Paw assembly 9 includes four paws 4；Each paw includes top plate portion 41, from the inwardly projecting formation of the inwall of top plate portion
Guide runner portion 42 and the drive surface 43 that is arranged in guide runner portion；Top plate portion is axially extending along core pipe, guide runner portion
Radially extend along core pipe；The outer wall of each paw top plate portion is provided with arc clip slot 411；Each guide runner portion inserts on core pipe corresponding
In one radially-directed slide opening, each drive surface stretches in the tube chamber of core pipe, and each top plate portion is positioned at core inside pipe wall and core tube wall
Between；Each paw reciprocatingly slides along the radial direction of core pipe under the guide and limit effect of radially-directed slide opening；Each guide runner portion
Cross sectional shape is adaptive with radially-directed slide opening I-shaped.
The arcuate groove in a corresponding crimp pressing plate portion is just arranged by the arc clip slot of each paw top plate portion, this arc clip slot
Forming a clamp hole 5 with this arcuate groove clamping, each clamp hole is for one electric power cable of clamping.In concrete practice, respectively press
The size of fitting can be different, and the distance between arcuate groove and the core tube wall in the most each pressing plate portion is different, such that it is able to formed
The clamp hole varied in size, for clamping the cable of different thicknesses.
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.
Top pressure bolt 1 includes body 11, the external screw thread district 12 that is arranged on body peripheral wall, be arranged on outer body end
Fastening part 13 and the top belling platform 14 being arranged on body medial extremity, that pushes up belling platform is shaped as circular cone shape；Top pressure bolt
The internal threaded regions of external screw thread district and core pipe is adaptive；Top axially extending along core pipe of belling platform, and be positioned in core pipe tube chamber.
In the present embodiment, the drive surface of each paw is one and the curved surface of top belling platform periphery wall adaptation, especially has
The curved surface of tapering；In concrete practice, this drive surface also can be selected for flat bevel.
In the present embodiment, in paw assembly, the quantity of paw is identical with the quantity of radially-directed 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 the ring-type of onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are side by side
Arranging combination and form annular, on the overall sheathed outer wall being fixed on each pressing plate portion of current transformer, namely crimp assemblies is positioned at electricity
In the vestibule that current transformer is overall.In concrete practice, current transformer also can be fixedly installed on the tube wall of core pipe, as long as making
Obtain all clamp holes to be positioned in the vestibule of toroidal inductive body, namely have only to so that cable passes toroidal inductive body
Vestibule.
Intelligent control module can include wireless transmit/receive units, and intelligent control module is felt annular by wireless transmit/receive units
The leakage current signal answering body to sense sends distance host to, to realize accurate long-range no worker monitor, finds in time Lou
Electric fault.The present embodiment can use as a zero sequence current mutual inductor.
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.
Top pressure bolt along preset direction rotate time, drive top belling platform to rotate in core pipe tube chamber traveling,
Top belling platform presses each drive surface to promote each paw by top so that each top plate portion is moved radially outward along core pipe, thus clamps position
Electric power cable in each clamp hole.
The present embodiment has following Advantageous Effects: (1) top pressure bolt and core pipe connect threadably, and by top
Belling platform 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
There is preferable anti-loosening effect.(2) it is to be arranged on core pipe by sliding due to crimp, first cable can be placed in each pressure
In the arc clip slot of pawl, more corresponding crimp is loaded in corresponding anticreep chute, corresponding electric power cable can be placed in
In clamp hole；This structure makes to clamp the easy to operation of electric power cable.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Fig. 9 to Figure 10, in the present embodiment, and annular sense
Sexuality is answered on the sheathed periphery wall being fixed on pressing plate portion of body；Core tube wall, crimp outer wall and toroidal inductive inner body wall it
Between clamping form multiple containing cavity 73, intelligent control module is arranged in containing cavity.This structure can make full use of space, has
It is beneficial to the small-sized and integrated of entirety.
(embodiment 3)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Figure 11 to Figure 12, at least one crimp 31
It is provided with the installation screw 315 extending radially through pressing plate portion 311 wall body along core pipe；This installation screw is fixed with a temperature sensing
Device 8.
Temperature sensing device 8 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, metal-back close to one end 812 of core tube hub axis
Body is provided with interior hexagonal away from one end 814 of core tube hub axis and twists groove 815；The periphery wall of metal shell is provided with and installs spiral shell
The external screw thread 816 that hole is adaptive, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to core from metal shell
The sharp tooth boss formed is protruded in one end 812 of tube hub axis.
Temperature sensor includes using the heat-conducting block 821 that heat conductive insulating elastomeric material is made, the U-shaped being arranged in heat-conducting block
Thermo-sensitive resistor 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can be reciprocal in the storage tank of metal shell
Slide；Heat-conducting block is connected on the diapire of storage tank close to one end of core tube hub axis；Two connect electric mortiser post protrusion and are arranged on
On the heat-conducting block other end away from core tube hub axis；
Heat-conducting block encloses formation cannelure between external diameter and the internal perisporium of storage tank away from the other end of core tube hub axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from core tube hub axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of core tube hub 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 core tube hub 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 core tube hub axis, and spring abuts away from the other end of core tube hub 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, pressing plate pressing plate 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, at least one installation screw and a temperature sensing dress can be respectively provided with on each crimp
Put, for each cable and and the temperature of crimp junction monitor in real time, thus realize what power network monitoring ran
The most intelligent.
(embodiment 4)
The present embodiment and embodiment 2 are essentially identical, and difference is: as shown in Figure 13 (and with reference to Figure 12), at least one pressure
Fitting 31 is provided with the installation screw 315 extending radially through pressing plate portion 311 wall body along core pipe；This installation screw is fixed with a temperature
Degree sensing device 8.
Temperature sensing device 8 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, metal-back close to one end 812 of core tube hub axis
Body is provided with interior hexagonal away from one end 814 of core tube hub axis and twists groove 815；The periphery wall of metal shell is provided with and installs spiral shell
The external screw thread 816 that hole is adaptive, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to core from metal shell
The sharp tooth boss formed is protruded in one end 812 of tube hub axis.
Temperature sensor includes using the heat-conducting block 821 that heat conductive insulating elastomeric material is made, the U-shaped being arranged in heat-conducting block
Thermo-sensitive resistor 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can be reciprocal in the storage tank of metal shell
Slide；Heat-conducting block is connected on the diapire of storage tank close to one end of core tube hub axis；Two connect electric mortiser post protrusion and are arranged on
On the heat-conducting block other end away from core tube hub axis；
Heat-conducting block encloses formation cannelure between external diameter and the internal perisporium of storage tank away from the other end of core tube hub axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from core tube hub axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of core tube hub 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 core tube hub 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 core tube hub axis, and spring abuts away from the other end of core tube hub 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, pressing plate pressing plate 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, at least one installation screw and a temperature sensing dress can be respectively provided with on each crimp
Put, for each cable and and the temperature of crimp junction monitor in real time, thus realize what power network monitoring ran
The most 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 three-phase power zero sequence current mutual inductor that a kind prevents cable from getting loose, it is characterised in that: include one top pressure bolt, one
Individual core pipe, current transformer, a set of crimp assemblies and a set of paw assembly；The tube wall of core pipe is provided with one group of pilot hole,
This group pilot hole includes at least three radially-directed slide opening；Core pipe tube chamber is provided with internal threaded regions；Crimp assemblies includes at least three
Individual crimp；Each crimp is provided with pressing plate portion and anticreep connecting portion；Crimp is arranged on core by anticreep connecting portion is dismountable
Guan Shang；Paw assembly includes at least three paw；Each paw includes top plate portion, leading from the inwardly projecting formation of the inwall of top plate portion
To slide section and the drive surface being arranged in guide runner portion；It is sliding that each guide runner portion inserts a corresponding radially-directed on core pipe
Kong Zhong, each drive surface stretches in the tube chamber of core pipe, and each top plate portion is between core inside pipe wall and core tube wall；The top of each paw
A corresponding crimp pressing plate portion is just arranged by plate portion, and this top plate portion and this pressing plate portion clamping form one and be used for clamping electric lines of force
The clamp hole of cable；Crimp assemblies and paw assembly form at least three clamp hole altogether；Current transformer includes toroidal inductive body；
Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Top pressure bolt includes body, the outer spiral shell being arranged on body peripheral wall
Stricture of vagina district and the top belling platform being arranged on body medial extremity, that pushes up belling platform is shaped as circular cone shape；The external screw thread of top pressure bolt
The internal threaded regions of district and core pipe is adaptive；Drive surface and a corresponding top belling platform periphery wall of each paw are adaptive；Pressure bolt edge, top
When preset direction rotates, driving top belling platform to rotate and advance in core pipe tube chamber, top belling platform is each by top pressure
Drive surface promotes each paw so that each top plate portion is moved radially outward along core pipe, thus clamping is positioned at the electric power in each clamp hole
Cable；At least one crimp is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes metal material system
Become the metal shell with storage tank, the temperature sensor being arranged in storage tank, for temperature sensor is crimped on appearance
Put the spring in groove bottom wall and the screwed pipe plug for limit spring；Metal shell is provided with close to one end of core tube hub axis
As puncturing the heat conduction boss used, metal shell is provided with interior hexagonal away from one end of core tube hub axis and twists groove；Metal-back
The periphery wall of body is provided with the external screw thread adaptive with installation screw, and the internal perisporium of storage tank is provided with internal threaded regions；Temperature sensing
Device includes the heat-conducting block, the U-shaped thermo-sensitive resistor being arranged in heat-conducting block that use heat conductive insulating elastomeric material to make, is arranged on heat conduction
Two on block connect electric mortiser post；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；Heat-conducting block is close to core tube hub axle
One end of line is connected on the diapire of storage tank；Two connect electric mortiser post and protrude and be arranged on another away from core tube hub axis of heat-conducting block
On one end；Heat-conducting block encloses formation annular between external diameter and the internal perisporium of storage tank away from the other end of core tube hub axis
Groove, spring is positioned in this cannelure and is set on heat-conducting block one end away from core tube hub axis；Screwed pipe plug is close to core pipe
The periphery wall of one end of 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 core tube hub axis and twists portion；The center of screwed pipe plug is provided with pipe
Chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is connected to close to one end of core tube hub axis
On heat-conducting block, spring is connected on screwed pipe plug away from the other end of core tube hub axis；Two on heat-conducting block connect electric mortiser post
It is positioned in the tube chamber of screwed pipe plug.
The three-phase power zero sequence current mutual inductor preventing cable from getting loose the most according to claim 1, it is characterised in that: heat conduction
Boss is to protrude the sharp tooth boss formed close to one end of core tube hub axis from metal shell.
The three-phase power zero sequence current mutual inductor preventing cable from getting loose the most according to claim 1, it is characterised in that: install
Screw extends radially through pressing plate portion along core pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286161.0A CN106024287A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero sequence current transformer capable of preventing cable loosening and separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286161.0A CN106024287A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero sequence current transformer capable of preventing cable loosening and separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106024287A true CN106024287A (en) | 2016-10-12 |
Family
ID=57081754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610286161.0A Withdrawn CN106024287A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero sequence current transformer capable of preventing cable loosening and separation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106024287A (en) |
Citations (3)
| 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 |
-
2016
- 2016-05-02 CN CN201610286161.0A patent/CN106024287A/en not_active Withdrawn
Patent Citations (3)
| 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 |
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