CN106098313B - Improved high-voltage zero sequence current mutual inductor - Google Patents
Improved high-voltage zero sequence current mutual inductor Download PDFInfo
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- CN106098313B CN106098313B CN201610281085.4A CN201610281085A CN106098313B CN 106098313 B CN106098313 B CN 106098313B CN 201610281085 A CN201610281085 A CN 201610281085A CN 106098313 B CN106098313 B CN 106098313B
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- wall
- heat
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- 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)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of improved high-voltage zero sequence current mutual inductors, including base tube, core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is equipped with multiple clamp boss；The tube wall of core pipe is equipped with two groups of pilot holes, and each group pilot hole includes multiple radial limit slide openings；Internal threaded regions there are two being set on the inner wall of core pipe；Each casing pressure claw assembly includes multiple claws；Each claw includes pressing plate portion, guide runner portion and drive surface；Each crimp includes ontology, the external screw thread area being arranged on body peripheral wall and the crimping boss being arranged on cylindrical body inner end, and the external screw thread area of crimp and the internal threaded regions of core pipe are adapted to；The drive surface of each claw and the periphery wall adaptation of crimping boss；Base tube is equipped with the installation screw of built-in temperature sensing device；When each crimp is rotated along preset direction, the pressing plate portion in corresponding a set of claw component is pushed to be moved radially outward along core pipe.Inventive preferably can promote smart grid.
Description
Technical field
The invention belongs to technical field of electric power, and in particular to a kind of improved high-voltage zero sequence current mutual inductor.
Background technique
The basic principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flowing into the telegram in reply of any node in circuit
The algebraical sum of stream is equal to zero.Under route and the normal situation of electrical equipment, the vector sum of each phase current is equal to zero, therefore, zero
The secondary side winding no signal of sequence current transformer exports, and executive component is failure to actuate.It is each when electric shock or leak current fault occurs
The vector sum of phase current is not zero, and fault current makes to generate magnetic flux in the iron core of zero sequence current mutual inductor, zero sequence current mutual inductor
Generated electric current is zero-sequence current.When protection mechanism receives the zero sequence current signal, it can be taken according to electrical leakage quantity accordingly
Protection act.
The mounting means of existing zero sequence current mutual inductor is mostly fixed using flange installation or is fixed using bonding mode, is pacified
Holding position generally require it is reserved so that the application of zero sequence current mutual inductor is by more limitation.
Summary of the invention
The object of the present invention is to provide a kind of improved high-voltage zero sequence current mutual inductors with real time temperature monitoring function.
Realizing the technical solution of the object of the invention is: a kind of improved high-voltage zero sequence current mutual inductor, including a base tube,
One core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is equipped with multiple clamp boss；Core pipe is located at base tube pipe
In chamber；The tube wall of core pipe is equipped with two groups of pilot holes, and each group pilot hole includes multiple radial limit slide openings；It is set on the inner wall of core pipe
There are two internal threaded regions；Each casing pressure claw assembly includes multiple claws；Each claw includes pressing plate portion, from pressing plate portion protrudes to be formed
Guide runner portion and the drive surface being arranged in guide runner portion；Corresponding one radial limit in each guide runner portion insertion core pipe
In slide opening, each drive surface is stretched in the lumen of core pipe, and each pressing plate portion is between base tube inner wall and core tube wall；Each claw
Pressing plate portion and corresponding clamp boss clamping form one for clamping the clamp hole of electric power cable；Each crimp includes this
Body, the external screw thread area being arranged on body peripheral wall and the crimping boss being arranged on cylindrical body inner end, crimp it is outer
Threaded area and the internal threaded regions of core pipe adaptation；The drive surface of each claw and the periphery wall adaptation of crimping boss；Each clamp boss
Inner wall is equipped with arc groove；The outer wall in each claw pressing plate portion is equipped with arc clip slot；It is equipped in each arc clip slot and arc groove multiple
It punctures；Multiple installation card slots are equipped in each arc clip slot and arc groove, each install is embedded with a piercing blade in card slot；Respectively wear
Thorn piece includes mounting portion and thorn blade, and mounting portion is inlaid in installation card slot, and thorn blade then exposes installation card slot and forms puncture；Respectively
When crimp is rotated along preset direction, drives crimping boss to towards on one side rotate while and advance in core pipe lumen, crimp boss and lead to
It crosses the drive surface pushed in corresponding a set of claw component and pushes each claw, so that the pressing plate portion in corresponding a set of claw component is along core
Pipe is moved radially outward, to clamp the electric power cable being located in clamp hole；Base tube is equipped with the installation of built-in temperature sensing device
Screw hole；Temperature sensing device includes the metal shell made of metal material with accommodation groove, the temperature being arranged in accommodation groove
Sensor, the spring for temperature sensor to be crimped in accommodating groove bottom wall, the screwed pipe plug for being used for limit spring.
The present invention has the effect of positive: (1) zero sequence current mutual inductor of the invention due to carry press claw type retaining mechanism,
Reserved installation position is not needed, is easily installed.(2) crimp and core pipe threadably connect, and are pushed respectively by crimping boss
The drive surface of claw, and then each claw is pushed to move along core pipe radial direction；Its operation is more laborsaving, and has preferable anti-
Loosen effect.(3) present invention is clamped on same cable using two casing pressure claw assemblies, and the clamp operation of each casing pressure claw assembly can be with
It individually carries out, this structure has the effect of double shield, even if wherein a set of go wrong in use, there are also another set of guarantors
Demonstrate,prove its working performance.(4) since base tube is equipped with installation screw, temperature sensing device is fixed in installation screw；So this hair
It is bright also to have the function of real time temperature monitoring, promote smart grid.
Detailed description of the invention
Fig. 1 is a kind of half-section diagram of the first structure of the invention；
Fig. 2 is that zero sequence current mutual inductor shown in Fig. 1 removes a kind of schematic perspective view after current transformer；
Fig. 3 is a kind of front view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 4 is a kind of half section structure diagram of zero sequence current mutual inductor shown in Fig. 2；
Fig. 5 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 6 is that zero sequence current mutual inductor shown in Fig. 2 removes a kind of explosive view after base tube and crimp；
Fig. 7 is a kind of half section structure diagram of second of structure of the invention；
Fig. 8 is the partial enlargement diagram in Fig. 7 at B；
Fig. 9 is a kind of half section structure diagram of the third structure of the invention；
Figure 10 is a kind of side structure schematic view of zero sequence current mutual inductor shown in Fig. 9.
Specific embodiment
(embodiment 1)
The present embodiment is a kind of improved high-voltage zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 6, including a base tube 1,
One crimp 3 of current transformer 7, two of core pipe 2, one and two casing pressure claw assemblies 9.
In the present embodiment, base tube, 2, two crimps 3 of core pipe and two casing pressure claw assemblies 9 are all made of insulating materials and are made.
The internal perisporium of base tube is set there are four clamp boss 11, and the inner wall of each clamp boss is equipped with arc groove 111, and each clamp is convex
Platform and arc groove are axially extending along base tube.The internal perisporium of base tube is axially additionally provided with multiple positioning runners 12 along base tube.
Core pipe and base tube are arranged concentrically, and core pipe is located in base tube lumen；Along base tube diameter there are four being set on the periphery wall of core pipe
The support protrusive board 21 extended to protrusion, each outboard end for supporting protrusive board is located in a corresponding positioning runner, thus core pipe branch
Support is located in the lumen of base tube；The tube wall of core pipe is equipped with two groups of pilot holes, each group pilot hole and a set of claw component adaptation；
Each group pilot hole includes four radial limit slide openings 22, this four radial limit slide openings are circumferentially evenly distributed on core pipe pipe along core pipe
On wall；Each radial limit slide opening extends radially through core pipe tube wall along base tube；Each radial limit slide opening is located in core pipe axial direction
The cross sectional shape at middle part, each radial limit slide opening is I-shaped.Internal threaded regions 23 there are two being set on the inner wall of core pipe, two groups of guiding
Hole is located between two internal threaded regions；In the present embodiment, in two internal threaded regions are arranged at core pipe two side ends adjacent openings
On wall.
In concrete practice, other shapes, such as round, rectangular, diamond shape is can also be used in the cross sectional shape for being oriented to slide opening,
It is feasible.
Each casing pressure claw assembly 9 includes four claws 4；Each claw includes that pressing plate portion 41, the inner wall from pressing plate portion are inwardly projecting
The guide runner portion 42 of formation and the drive surface 43 being arranged in guide runner portion；Pressing plate portion is axially extending along base tube, and guiding is slided
Block portion is radially extended along base tube；The outer wall in each claw pressing plate portion is equipped with arc clip slot 411；In each guide runner portion insertion core pipe
In corresponding one radial limit slide opening, each drive surface is stretched in the lumen of core pipe, and each pressing plate portion is located at base tube inner wall and core pipe
Between outer wall；Each claw reciprocatingly slides under the guide and limit effect of radially limit slide opening along the radial direction of base tube；Each guide runner
The cross sectional shape in portion is I-shaped with radial limit slide opening adaptation.
Corresponding clamp boss clamping in each pressing plate portion and base tube forms one for clamping the clamp of electric power cable
Hole 5；In the present embodiment, the arc groove clamping of the arc clip slot in each pressing plate portion and a corresponding clamp boss is formed for clamping electricity
The clamp hole 5 of line of force cable；The present embodiment forms four clamp holes altogether.
Each crimp 3 includes cylindrical body 31, the external screw thread area 32 being arranged on cylindrical body periphery wall, is arranged in column
The fastening part 33 at outer body end and the crimping boss 34 being arranged on cylindrical body inner end, the shape for crimping boss is circular cone
Mesa-shaped；The external screw thread area of each crimp and the internal threaded regions adaptation of core pipe；Boss is crimped along the axially extending of base tube, and is located at core
In pipe lumen.
In the present embodiment, the drive surface of each claw is the curved surface of one and crimping boss periphery wall adaptation, in concrete practice
In, which also can be selected inclined-plane.
The quantity of claw is identical with the quantity for being oriented to slide opening in each group pilot hole in each casing pressure claw assembly in the present embodiment, and
At least three.
Current transformer 7 includes toroidal inductive ontology 71 and intelligent control module 72；In the present embodiment, intelligent control module
72 are made into toroidal inductive ontology with onesize vestibule, and group is arranged side by side in annular perception induction ontology and intelligent control module
It closes and forms annular, current transformer is integrally arranged on the periphery wall for being fixed on base tube.In concrete practice, current transformer may be used also
It is fixed on the tube wall of core pipe, as long as being located at all clamp holes in the vestibule of toroidal inductive ontology, namely only
It is required that cable passes through the vestibule of toroidal inductive ontology.
Intelligent control module may include wireless transmit/receive units, and intelligent control module is by wireless transmit/receive units annular base
The leakage current signal that pipe senses sends distance host to, with the accurate long-range no worker monitor of realization, the event of discovery electric leakage in time
Barrier.
The present embodiment is equipped with multiple punctures 6 to promote chuck strength also in each arc groove and arc clip slot；It is specific next
It says, each radially protruding punctured along core pipe portion.
In the present embodiment, each claw is the integral piece made of injection molding, and each puncture is made in injection molding；?
In concrete practice, puncture can also be used other way and be made；Such as multiple installation card slots are equipped in each arc groove, then adopting
The puncture piece being made from an insulative material is inlaid in corresponding installation card slot；Puncturing piece includes mounting portion and thorn blade, installation
Portion is inlaid in installation card slot, and thorn blade then exposes installation card slot and forms puncture.It, can also be using each in concrete practice
The mode of screw thread is set in arc clip slot and arc groove, it also can improving clamping sigma compactness energy.
When each crimp is rotated along preset direction, drives crimping boss to towards while rotating and advances in core pipe lumen,
Each crimping boss pushes claw by pushing the drive surface in corresponding a set of claw component, so that in corresponding a set of claw component
Each pressing plate portion is moved radially outward along core pipe, to clamp the electric power cable being located in each clamp hole.
The present embodiment has following advantageous effects: (1) crimp and core pipe threadably connect, and pass through crimping
Boss pushes the drive surface of each claw, and then each claw is pushed to move along core pipe radial direction；Its operation is more laborsaving, and has
There is preferable anti-loosening effect.(2) present invention is clamped on same cable using two casing pressure claw assemblies, the folder of each casing pressure claw assembly
Tight operation can be carried out individually, and this structure has the effect of double shield, even if wherein a set of go wrong in use, also
There is another set of its working performance of guarantee.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, the difference is that: as shown in Fig. 7 and Fig. 8, base tube 1 is equipped with along base tube
Extend radially through the installation screw 18 of 11 wall body of clamp boss；Temperature sensing device 8 is fixed in the installation screw；
Temperature sensing device includes the metal shell 81 made of metal material with accommodation groove 811, is arranged in accommodation groove
In temperature sensor 82, the spring 83 for temperature sensor to be crimped in accommodating groove bottom wall, be used for the spiral shell of limit spring
Pipe plug 84；
Metal shell is equipped with the thermally conductive boss 813 used as puncture, metal-back close to one end of base tube central axis 812
Body is equipped with interior hexagonal far from one end 814 of base tube central axis and twists slot 815；The periphery wall of metal shell is equipped with and installs spiral shell
The internal perisporium of the external screw thread 816 of hole adaptation, accommodation groove is equipped with internal threaded regions 817；Thermally conductive boss is from metal shell close to base
The sharp tooth boss that the protrusion of one end 812 of tube hub axis is formed；
Temperature sensor includes using heat-conducting block 821 made of heat conductive insulating rubber material, the U-shaped being arranged in heat-conducting block
Thermo-sensitive resistor 822, two be arranged on heat-conducting block connect electric mortiser column 823；Heat-conducting block can be reciprocal in the accommodation groove of metal shell
Sliding；On the bottom wall that one end of heat-conducting block close to base tube central axis is connected to accommodation groove；Two connect the protrusion setting of electric mortiser column and exist
On the other end of the heat-conducting block far from base tube central axis；
Annular is enclosed between the outer diameter of the other end of the heat-conducting block far from base tube central axis and the internal perisporium of accommodation groove
Slot 100, spring are located in the annular groove and are set on the one end of heat-conducting block far from base tube central axis；
Screwed pipe plug close to one end of base tube central axis periphery wall be equipped with external screw thread area 841, the external screw thread area and
The internal threaded regions 817 of metal shell are adapted to；The periphery wall of the one end of screwed pipe plug far from base tube central axis is equipped with outer-hexagonal
Twist portion 842；Lumen 843 is equipped at the center of screwed pipe plug；Screwed pipe plug is fixed at annular groove by its external screw thread area
In；
One end of spring close to base tube central axis is connected on heat-conducting block, the other end of the spring far from base tube central axis
It is connected on screwed pipe plug；Two on heat-conducting block connect electric mortiser column and are located in the lumen 843 of screwed pipe plug.
The internal perisporium of intelligent control module 72 is equipped with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket is inserted into 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 that, since metal shell is easily deformed when squeezing cable, squeezes temperature sensor
Heat-conducting block, if heat-conducting block does not have mobile space, be easy compression deformation damage；The present embodiment, can by setting spring
Heat-conducting block is crimped on the bottom wall of metal shell accommodation groove, can correctly predict cable and base tube clamp boss junction
Real time temperature；Mobile space can also be reserved to heat-conducting block after metal shell compressive deformation, thus prevent heat-conducting block by by
Crushing is bad；This structure has preferable practical performance.
In concrete practice, multiple installation screws and multiple temperature sensing devices can be set on base tube, for every
It one cable and is monitored in real time with the temperature of base tube clamp boss junction, to realize the further of power network monitoring operation
It is intelligent.
(embodiment 3)
The present embodiment and embodiment 1 are essentially identical, the difference is that: as shown in Fig. 9 to Figure 10, in the present embodiment, ring
Shape perception induction ontology is arranged on the periphery wall for being fixed on base tube；The periphery wall of base tube is equipped with the wiring for extending radially through tube wall
Position shown in the 13(dotted line of hole)；Base tube inner wall, clamp boss, supports clamping between protrusive board, claw pressing plate portion to be formed at core tube wall
Multiple accommodating cavities 73, intelligent control module are arranged in accommodating cavity；Being electrically connected between toroidal inductive ontology and intelligent control module
Wiring passes through the routing hole.This structure can make full use of space, be conducive to whole small-sized and integrated.
In addition, base tube 1 is equipped with the installation screw 18 for extending radially through 11 wall body of clamp boss along base tube；It is solid in the installation screw
Surely it is equipped with temperature sensing device 8；
Temperature sensing device includes the metal shell 81 made of metal material with accommodation groove 811, is arranged in accommodation groove
In temperature sensor 82, the spring 83 for temperature sensor to be crimped in accommodating groove bottom wall, be used for the spiral shell of limit spring
Pipe plug 84；
Metal shell is equipped with the thermally conductive boss 813 used as puncture, metal-back close to one end of base tube central axis 812
Body is equipped with interior hexagonal far from one end 814 of base tube central axis and twists slot 815；The periphery wall of metal shell is equipped with and installs spiral shell
The internal perisporium of the external screw thread 816 of hole adaptation, accommodation groove is equipped with internal threaded regions 817；Thermally conductive boss is from metal shell close to base
The sharp tooth boss that the protrusion of one end 812 of tube hub axis is formed；
Temperature sensor includes using heat-conducting block 821 made of heat conductive insulating rubber material, the U-shaped being arranged in heat-conducting block
Thermo-sensitive resistor 822, two be arranged on heat-conducting block connect electric mortiser column 823；Heat-conducting block can be reciprocal in the accommodation groove of metal shell
Sliding；On the bottom wall that one end of heat-conducting block close to base tube central axis is connected to accommodation groove；Two connect the protrusion setting of electric mortiser column and exist
On the other end of the heat-conducting block far from base tube central axis；
Annular is enclosed between the outer diameter of the other end of the heat-conducting block far from base tube central axis and the internal perisporium of accommodation groove
Slot 100, spring are located in the annular groove and are set on the one end of heat-conducting block far from base tube central axis；
Screwed pipe plug close to one end of base tube central axis periphery wall be equipped with external screw thread area 841, the external screw thread area and
The internal threaded regions 817 of metal shell are adapted to；The periphery wall of the one end of screwed pipe plug far from base tube central axis is equipped with outer-hexagonal
Twist portion 842；Lumen 843 is equipped at the center of screwed pipe plug；Screwed pipe plug is fixed at annular groove by its external screw thread area
In；
One end of spring close to base tube central axis is connected on heat-conducting block, the other end of the spring far from base tube central axis
It is connected on screwed pipe plug；Two on heat-conducting block connect electric mortiser column and are located in the lumen 843 of screwed pipe plug.
The internal perisporium of intelligent control module 72 is equipped with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket is inserted into 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 that, since metal shell is easily deformed when squeezing cable, squeezes temperature sensor
Heat-conducting block, if heat-conducting block does not have mobile space, be easy compression deformation damage；The present embodiment, can by setting spring
Heat-conducting block is crimped on the bottom wall of metal shell accommodation groove, can correctly predict cable and base tube clamp boss junction
Real time temperature；Mobile space can also be reserved to heat-conducting block after metal shell compressive deformation, thus prevent heat-conducting block by by
Crushing is bad；This structure has preferable practical performance.
In concrete practice, multiple installation screws and multiple temperature sensing devices can be set on base tube, for every
It one cable and is monitored in real time with the temperature of base tube clamp boss junction, to realize the further of power network monitoring operation
It is intelligent.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And these
Belong to the obvious changes or variations that connotation of the invention is extended out and still falls within protection scope of the present invention.
Claims (1)
1. a kind of improved high-voltage zero sequence current mutual inductor, it is characterised in that: including a base tube, a core pipe, an electric current
Mutual inductor, two crimps and two casing pressure claw assemblies；
The internal perisporium of base tube is equipped with multiple clamp boss；The inner wall of each clamp boss is equipped with arc groove, each clamp boss and arc
Slot is axially extending along base tube；
Core pipe is located in base tube lumen；The tube wall of core pipe is equipped with two groups of pilot holes, and each group pilot hole includes multiple radial limits
Slide opening；Internal threaded regions there are two being set on the inner wall of core pipe；Each group pilot hole and a set of claw component adaptation；
Each casing pressure claw assembly includes multiple claws；Each claw includes pressing plate portion, protrudes the guide runner portion to be formed from pressing plate portion
With the drive surface being arranged in guide runner portion；In each guide runner portion insertion core pipe in corresponding one radial limit slide opening, respectively
Drive surface stretches in the lumen of core pipe, and each pressing plate portion is between base tube inner wall and core tube wall；Outside each claw pressing plate portion
Wall is equipped with arc clip slot；Each claw reciprocatingly slides under the guide and limit effect of radially limit slide opening along the radial direction of base tube；Respectively
The cross sectional shape in guide runner portion is I-shaped with radial limit slide opening adaptation；The arc groove of each clamp boss and one corresponding
The arc clip slot clamping in claw pressing plate portion forms a clamp hole；
Each crimp includes ontology, the external screw thread area being arranged on body peripheral wall, the fastening that cylindrical body outboard end is arranged in
Portion and the crimping boss being arranged on cylindrical body inner end, the external screw thread area of crimp and the internal threaded regions adaptation of core pipe；Pressure
The shape for connecing boss is circular cone shape, and the drive surface of each claw is the curved surface or oblique of the periphery wall adaptation of one and crimping boss
Face；Multiple punctures are equipped in each arc clip slot and arc groove；Multiple installation card slots are equipped in each arc clip slot and arc groove, it is each to pacify
It is loaded in slot embedded with a piercing blade；Each piece that punctures includes mounting portion and thorn blade, and mounting portion is inlaid in installation card slot,
Thorn blade then exposes installation card slot and forms puncture；
Current transformer includes toroidal inductive ontology and intelligent control module, and annular perception induction ontology and intelligent control module are simultaneously
Row's setting combination forms annular, and current transformer is integrally arranged on the periphery wall for being fixed on base tube；
When each crimp is rotated along preset direction, drives crimping boss to towards while rotate and advance in core pipe lumen, crimping
Boss pushes each claw by pushing the drive surface in corresponding a set of claw component, so that the pressing plate in corresponding a set of claw component
Portion is moved radially outward along core pipe, to clamp the electric power cable being located in clamp hole；
Base tube is equipped with the installation screw of built-in temperature sensing device；Temperature sensing device includes having accommodating made of metal material
The metal shell of slot, the temperature sensor being arranged in accommodation groove accommodate in groove bottom wall for temperature sensor to be crimped on
Spring, the screwed pipe plug for limit spring；
Metal shell is equipped with the thermally conductive boss used as puncture close to one end of core pipe central axis, and metal shell is far from core pipe
One end of central axis is equipped with interior hexagonal and twists slot；The periphery wall of metal shell is equipped with and the external screw thread of installation screw adaptation,
The internal perisporium of accommodation groove is equipped with internal threaded regions；Temperature sensor include using heat-conducting block made of heat conductive insulating rubber material,
The U-shaped thermo-sensitive resistor being arranged in heat-conducting block, two be arranged on heat-conducting block connect electric mortiser column；Heat-conducting block can be in metal shell
It reciprocatingly slides in accommodation groove；On the bottom wall that one end of heat-conducting block close to core pipe central axis is connected to accommodation groove；Two connect electric mortiser
Column protrusion is arranged on the other end of the heat-conducting block far from core pipe central axis；The other end of the heat-conducting block far from core pipe central axis
Annular groove is enclosed between outer diameter and the internal perisporium of accommodation groove, spring is located in the annular groove and is set in heat-conducting block far from core
On one end of tube hub axis；The periphery wall of screwed pipe plug close to one end of core pipe central axis is equipped with external screw thread area, this is outer
Threaded area and the internal threaded regions of metal shell adaptation；The periphery wall of the one end of screwed pipe plug far from core pipe central axis is equipped with outer
Hexagonal twists portion；Lumen is equipped at the center of screwed pipe plug；Screwed pipe plug is fixed in annular groove by its external screw thread area；
One end of spring close to core pipe central axis is connected on heat-conducting block, and spring is connected to spiral shell far from the other end of core pipe central axis
On pipe plug；Two on heat-conducting block connect electric mortiser column and are located in the lumen of screwed pipe plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281085.4A CN106098313B (en) | 2016-05-02 | 2016-05-02 | Improved high-voltage zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281085.4A CN106098313B (en) | 2016-05-02 | 2016-05-02 | Improved high-voltage zero sequence current mutual inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106098313A CN106098313A (en) | 2016-11-09 |
| CN106098313B true CN106098313B (en) | 2019-01-29 |
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| 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 |
| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
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