CN106098342A - A kind of modified model mesohigh zero sequence current mutual inductor - Google Patents
A kind of modified model mesohigh zero sequence current mutual inductor Download PDFInfo
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- CN106098342A CN106098342A CN201610280313.6A CN201610280313A CN106098342A CN 106098342 A CN106098342 A CN 106098342A CN 201610280313 A CN201610280313 A CN 201610280313A CN 106098342 A CN106098342 A CN 106098342A
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- base tube
- heat
- core pipe
- paw
- boss
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- 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
- 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
-
- 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
-
- 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
- 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
-
- 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
- H01F2038/305—Constructions with toroidal magnetic core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a kind of modified model mesohigh zero sequence current mutual inductor, including base tube, core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is provided with multiple clamp boss；The tube wall of core pipe is provided with two groups of pilot holes, and each group pilot hole includes the spacing slide opening of multiple radial direction；The inwall of core pipe is provided with two internal threaded regions；Each casing pressure claw assembly all includes multiple paw；Each paw includes pressing plate portion, guide runner portion and drive surface；Each crimp includes body, be arranged on body peripheral wall external screw thread district and the crimping boss being arranged on cylindrical body medial extremity, the external screw thread district of crimp 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；Base tube is provided with the installation screw of built-in temperature sensing device；Each crimp along preset direction rotate time, promote the pressing plate portion in corresponding a set of paw assembly to be moved radially outward along core pipe.Performance of the present invention is preferable, promotes electrical network intelligent.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of modified model mesohigh zero sequence current mutual inductor.
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 modified model mesohigh zero sequence current mutual inductance with real time temperature control function
Device.
The technical scheme realizing the object of the invention is: a kind of modified model mesohigh zero sequence current mutual inductor, it is characterised in that:
Including a base tube, a core pipe, two crimps and two casing pressure claw assemblies；The internal perisporium of base tube is provided with multiple clamp boss；
Core pipe is positioned in base tube tube chamber；The tube wall of core pipe is provided with two groups of pilot holes, and each group pilot hole includes the spacing slide opening of multiple radial direction；
The inwall of core pipe is provided with two internal threaded regions；Each casing pressure claw assembly all includes multiple paw；Each paw includes pressing plate portion, from pressure
The guide runner portion formed and the drive surface being arranged in guide runner portion are protruded in plate portion；Each guide runner portion inserts core Guan Shangxiang
Answering in a 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 outside base tube inwall and core pipe
Between wall；Pressing plate portion and a corresponding clamp boss clamping of each paw form one for the clamp hole clamping electric power cable；
Each crimp includes body, be arranged on body peripheral wall external screw thread district and the crimping being arranged on cylindrical body medial extremity are convex
Platform, the external screw thread district of crimp 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；
Each crimp along preset direction rotate time, drive crimping boss to rotate in core pipe tube chamber traveling, crimping boss
Each paw is promoted so that the edge, pressing plate portion in corresponding a set of paw assembly by pushing the drive surface in corresponding a set of paw assembly
Core pipe is moved radially outward, thus clamping is positioned at the electric power cable in clamp hole；
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,
Need not reserved installation position, it is easy to install.(2) crimp and core pipe connect threadably, and push each by crimping boss
The drive surface of paw, and then promote each paw to move along core pipe radial direction；Its operation is the most laborsaving, and has the most anti-
Loosen effect.(3) present invention uses two casing pressure claw assemblies to be clamped on same cable, and the clamp operation of each casing pressure claw assembly is permissible
Individually carrying out, this structure has the effect of double shield, in use goes wrong even if the most a set of, the most another set of guarantor
Demonstrate,prove its service behaviour.(4) it is provided with installation screw due to base tube, installation screw is fixed with temperature sensing device；So this
Bright also have real time temperature control function, promotes 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 front view of 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 partly cuts open structural representation；
Fig. 5 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 6 is a kind of explosive view after zero sequence current mutual inductor shown in Fig. 2 removes base tube and crimp；
Fig. 7 is that the one of the second structure of the present invention partly cuts open structural representation；
Fig. 8 is the close-up schematic view in Fig. 7 at B；
Fig. 9 is that the one of the third structure of the present invention partly cuts open structural representation；
Figure 10 is a kind of side-looking structural representation of zero sequence current mutual inductor shown in Fig. 9.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of modified model mesohigh zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 6, including a base tube 1,
Individual core pipe 7, two crimps of 2, current transformer 3 and two casing pressure claw assemblies 9.
In the present embodiment, base tube, 2, two crimps of core pipe 3 and two casing pressure claw assemblies 9 are all adopted and are made from an insulative material.
The internal perisporium of base tube is provided with four 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 multiple positioning runner 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 two groups of pilot holes, and each group pilot hole and a set of paw assembly are adaptive；
Each group pilot hole includes four spacing slide openings of radial direction 22, and these four spacing slide openings of radial direction are evenly distributed on core pipe pipe along core pipe circumference
On wall；Each radially spacing slide opening all extends radially through core tube wall along base tube；Each radially spacing slide opening be positioned at core pipe axially on
Middle part, the cross sectional shape of each radially spacing slide opening is I-shaped.The inwall of core pipe is provided with two internal threaded regions 23, two groups of guiding
Hole is between two internal threaded regions；In the present embodiment, it is interior that two internal threaded regions are arranged at core pipe two side ends adjacent openings
On wall.
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.
Each casing pressure claw assembly 9 includes four paws 4；Each paw includes that pressing plate portion 41, inwall from pressing plate portion are inwardly projecting
The guide runner portion 42 formed and the drive surface 43 being arranged in guide runner portion；Pressing plate portion is axially extending along base tube, guides sliding
Block portion radially extends 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
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 inwall and core pipe
Between outer wall；Each paw radial direction along base tube under the guide and limit effect of radially spacing slide opening reciprocatingly slides；Each guide runner
The cross sectional shape in portion is adaptive with radially spacing slide opening I-shaped.
A corresponding clamp boss clamping in each pressing plate portion and base tube forms one for the clamp clamping electric power cable
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 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, be arranged on cylindrical body periphery wall external screw thread district 32, it is arranged on column
The fastening part 33 of outer body end and the crimping boss 34 being arranged on cylindrical body medial extremity, crimp boss is shaped as circular cone
Mesa-shaped；The external screw thread district of each 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
In pipe tube 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 each casing pressure claw 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 7 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.
Each crimp along preset direction rotate time, drive crimping boss to rotate in core pipe tube chamber traveling,
Each crimping boss promotes paw by pushing the drive surface in corresponding a set of paw assembly so that in corresponding a set of paw assembly
Each pressing plate portion is moved radially outward along core pipe, thus clamping is positioned at the 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.(2) present invention uses two casing pressure claw assemblies to be clamped on same cable, the folder of each casing pressure claw assembly
Tight operation can individually be carried out, and this structure has the effect of double shield, in use goes wrong even if the most a set of, also
There is its service behaviour of another set of guarantee.
(embodiment 2)
The present embodiment and embodiment 1 are essentially identical, and difference is: as shown in Fig. 7 and Fig. 8, and base tube 1 is provided with along base tube radially
Run through 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 in storage tank
Temperature sensor 82, block up for spring 83, the screwed pipe that is used for limit spring that temperature sensor is crimped on storage tank diapire
84；
Metal shell is provided with as puncturing the heat conduction boss 813 used close to one end 812 of base tube central axis, and metal shell is remote
It is provided with interior hexagonal from one end 814 of base tube central axis and twists groove 815；The periphery wall of metal shell is provided with fits with installation screw
The external screw thread 816 joined, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to base tube from metal shell
The sharp tooth boss formed is protruded in one end 812 of mandrel line；
Temperature sensor includes that the heat-conducting block 821 using heat conductive insulating elastomeric material to make, the U-shaped that is arranged in heat-conducting block are temperature sensitive
Resistance 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；
Heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser post protrusion and are arranged on heat-conducting block
On the other end away from base tube central axis；
Heat-conducting block is away from enclosing formation cannelure between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of base tube central axis, this external screw thread district and metal
The internal threaded regions 817 of housing is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central axis and twists
Portion 842；The center of screwed pipe plug is provided with tube chamber 843；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；
Spring is connected on heat-conducting block close to one end of base tube central axis, and spring abuts away from the other end of base tube central axis
On screwed pipe plug；On heat-conducting block two connect electric mortiser post and are positioned in the tube chamber 843 of screwed pipe plug.
The internal perisporium of intelligent control module 72 is provided with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket inserts corresponding one and connects in electric bushing, so that temperature sensor is connected with the middle control circuit in intelligent control module.
This structure has the following advantages, owing to metal shell is easily deformed when extruding cable, and extrusion temperature sensor
Heat-conducting block, if heat-conducting block does not has mobile space, then easily pressurized deformation damages；The present embodiment, can by arranging spring
Heat-conducting block is crimped on the diapire of metal shell storage tank so that it is can correctly predict cable and 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 Fig. 9 to Figure 10, 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 13 extending radially through tube wall
(position shown in dotted line)；Base tube inwall, core tube wall, clamp boss, support between flange, paw pressing plate portion clamping formed multiple
Containing cavity 73, intelligent control module is arranged in containing cavity；Electric connection line between toroidal inductive body and intelligent control module
Through described routing hole.This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
It addition, base tube 1 is provided with the installation screw 18 extending radially through clamp boss 11 wall body along base tube；In this installation screw admittedly
Surely temperature sensing device 8 it is provided with；
Temperature sensing device includes the metal shell 81 with storage tank 811 that metal material makes, is arranged in storage tank
Temperature sensor 82, block up for spring 83, the screwed pipe that is used for limit spring that temperature sensor is crimped on storage tank diapire
84；
Metal shell is provided with as puncturing the heat conduction boss 813 used close to one end 812 of base tube central axis, and metal shell is remote
It is provided with interior hexagonal from one end 814 of base tube central axis and twists groove 815；The periphery wall of metal shell is provided with fits with installation screw
The external screw thread 816 joined, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to base tube from metal shell
The sharp tooth boss formed is protruded in one end 812 of mandrel line；
Temperature sensor includes that the heat-conducting block 821 using heat conductive insulating elastomeric material to make, the U-shaped that is arranged in heat-conducting block are temperature sensitive
Resistance 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；
Heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser post protrusion and are arranged on heat-conducting block
On the other end away from base tube central axis；
Heat-conducting block is away from enclosing formation cannelure between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of base tube central axis, this external screw thread district and metal
The internal threaded regions 817 of housing is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central axis and twists
Portion 842；The center of screwed pipe plug is provided with tube chamber 843；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；
Spring is connected on heat-conducting block close to one end of base tube central axis, and spring abuts away from the other end of base tube central axis
On screwed pipe plug；On heat-conducting block two connect electric mortiser post and are positioned in the tube chamber 843 of screwed pipe plug.
The internal perisporium of intelligent control module 72 is provided with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket inserts corresponding one and connects in electric bushing, so that temperature sensor is connected with the middle control circuit in intelligent control module.
This structure has the following advantages, owing to metal shell is easily deformed when extruding cable, and extrusion temperature sensor
Heat-conducting block, if heat-conducting block does not has mobile space, then easily pressurized deformation damages；The present embodiment, can by arranging spring
Heat-conducting block is crimped on the diapire of metal shell storage tank so that it is can correctly predict cable and 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. a modified model mesohigh zero sequence current mutual inductor, it is characterised in that: include a base tube, core pipe, two pressures
Fitting and two casing pressure claw assemblies；The internal perisporium of base tube is provided with multiple clamp boss；Core pipe is positioned in base tube tube chamber；The tube wall of core pipe
Being provided with two groups of pilot holes, each group pilot hole includes the spacing slide opening of multiple radial direction；The inwall of core pipe is provided with two internal threaded regions；
Each casing pressure claw assembly all includes multiple paw；Each paw includes pressing plate portion, protrudes the guide runner portion formed from pressing plate portion and set
Put the drive surface in guide runner portion；On each guide runner portion insertion core pipe in a corresponding spacing slide opening of radial direction, respectively drive
Face stretches in the tube chamber of core pipe, and each pressing plate portion is positioned between base tube inwall and core tube wall；The pressing plate portion of each paw is with corresponding
One clamp boss clamping forms one for the clamp hole clamping electric power cable；Each crimp includes body, is arranged on body
External screw thread district on periphery wall and the crimping boss being arranged on cylindrical body medial extremity, the external screw thread district of crimp and core pipe
Internal threaded regions is adaptive；The periphery wall of the drive surface of each paw and crimping boss is adaptive；Each crimp along preset direction rotate time, band
Dynamic pressure connects boss and rotates while advancing in core pipe tube chamber, and crimping boss is by pushing in corresponding a set of paw assembly
Drive surface promotes each paw so that the pressing plate portion in corresponding a set of paw assembly is moved radially outward along core pipe, thus clamps position
Electric power cable in clamp hole；Base tube is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes metal
What material was made the have metal shell of storage tank, the temperature sensor being arranged in storage tank, for by temperature sensor pressure
It is connected on the spring on storage tank diapire, screwed pipe plug for limit spring；Metal shell is close to one end of base tube central axis
It is provided with as puncturing the heat conduction boss used；Metal shell is provided with interior hexagonal away from one end of base tube central axis and twists groove；Gold
The periphery wall belonging to housing 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
Sensor 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
Two on heat-conducting block connect electric mortiser post；Heat-conducting block can reciprocatingly slide in the storage tank of metal shell；Heat-conducting block is close in base tube
One end of mandrel line is connected on the diapire of storage tank；Two connect electric mortiser post protrusion and are arranged on heat-conducting block away from base tube central axis
The other end on；Heat-conducting block is away from enclosing formation ring between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
Shape groove, 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 close to base
The periphery wall of one end of tube hub axis is provided with external screw thread district, and the internal threaded regions of this external screw thread district and metal shell is adaptive；Spiral shell
Pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central 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 base tube central axis
On heat-conducting block, spring is connected on screwed pipe plug away from the other end of base tube central axis；Two on heat-conducting block connect electric mortiser post
It is positioned in the tube chamber of screwed pipe plug.
Modified model mesohigh zero sequence current mutual inductor the most according to claim 1, it is characterised in that: heat conduction boss is from gold
Belong to the housing sharp tooth boss close to one end protrusion formation of base tube central axis.
Modified model mesohigh zero sequence current mutual inductor the most according to claim 1, it is characterised in that: installation screw is along base tube
Extend radially through clamp boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280313.6A CN106098342A (en) | 2016-05-02 | 2016-05-02 | A kind of modified model mesohigh zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610280313.6A CN106098342A (en) | 2016-05-02 | 2016-05-02 | A kind of modified model mesohigh zero sequence current mutual inductor |
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| CN101419096A (en) * | 2008-12-12 | 2009-04-29 | 王涛 | Temperature sensor fixing structure on high-pressure electrified conductor and electrified installation tool thereof |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101419096A (en) * | 2008-12-12 | 2009-04-29 | 王涛 | Temperature sensor fixing structure on high-pressure electrified conductor and electrified installation tool thereof |
| 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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Application publication date: 20161109 |