CN207938459U

CN207938459U - A kind of current transformer of liquid silica gel fusion insulation

Info

Publication number: CN207938459U
Application number: CN201820461406.3U
Authority: CN
Inventors: 黎明; 张庆华
Original assignee: BEIJING MICROPOWER TECHNOLOGY Co Ltd
Current assignee: BEIJING MICROPOWER TECHNOLOGY Co Ltd
Priority date: 2018-04-03
Filing date: 2018-04-03
Publication date: 2018-10-02
Anticipated expiration: 2028-04-03

Abstract

The utility model embodiment provides a kind of current transformer of liquid silica gel fusion insulation, including：Silicon rubber external insulation shell, liquid silica gel interior insulation body, iron core, secondary winding, the secondary winding is uniformly wound on the iron core, form two sub-cells, two sub-cell is placed in the silicon rubber external insulation shell, liquid silastic vacuum encapsulation is used between the silicon rubber external insulation shell and two sub-cell, the liquid silica gel interior insulation body is formed, there are a conducting wire cable-through holes for the silicon rubber external insulation casing center position.The utility model embodiment makes silicon rubber external insulation shell using silicon rubber, and technique makes simply, and insulation thickness is consistent, stable and reliable for performance, shortens the production cycle, reduces energy consumption, low-carbon environment-friendly；Embedding liquid silastic and the silicon rubber external insulation shell being fabricated to are same type of material, and the two compatibility is good, is not in air gap, can effectively solve the problems, such as shelf depreciation.

Description

A kind of current transformer of liquid silica gel fusion insulation

Technical field

The utility model embodiment is related to the electrical detection technique field of electric system, and specially a kind of liquid silica gel fusion is exhausted The current transformer of edge.

Background technology

With the construction of intelligent grid, the mutual inductor as intelligent grid important component should fully demonstrate " low-carbon, The characteristics of energy conservation and environmental protection, stable and reliable for performance and miniaturization " and demand, use is environmentally protective, function admirable insulating materials makes Current transformer, voltage transformer etc. also therefore come into being, to ensure that above equipment electric property is reliable and stable, energy-saving ring It protects, it is necessary to the problem of resolving insulation processing in mutual inductor manufacturing process.Currently, the making side of outdoor high-voltage mutual inductor major insulation Formula is mainly the following：Encapsulating mutual inductor device body is poured into a mould using epoxide resin vacuum, interior insulation pour mass is made, in interior insulation The mode of pour mass outer encapsulating silicon rubber insulation sheath；The side of encapsulating mutual inductor device body is poured into a mould using outdoor epoxide resin vacuum Formula；Insulation crust is fabricated to using silicon rubber, vacuum encapsulation epoxy resin, silicon rubber after mutual inductor device body is put into insulation crust Cover the mode of bonding.

Although above-mentioned several method solve to a certain extent the UV resistant of outdoor mutual inductor, anti-aging, hydrophobicity, Miniaturization issues, but exist as following drawbacks：Epoxy resin poured body outsourcing silicon rubber, the silicon rubber of outsourcing is generally on the left sides 3-5mm The right side, there are ageing-resistant short lifes, transport breakage of easily colliding in installation process, make epoxy resin leakage aging, product is caused to run The problem of lost of life；Outdoor epoxide resin vacuum cast encapsulating mutual inductor, there are when ultraviolet radiation, product surface will appear Coarse aging phenomenon causes product surface hydrophobicity to decline, temperature change drastically when be also easy to produce cracking, dielectric strength reduction, very To the problem of insulation breakdown occurs；Using silicon rubber insulation sheath vacuum encapsulation epoxy resin, silicon rubber covers made of bonding Mutual inductor, there are epoxy resin to be combined bad with silicon rubber, gap is occurred, is caused the problem that partial discharge quantity is big.

Utility model content

To solve the above-mentioned problems of the prior art, the utility model embodiment provides a kind of liquid silica gel fusion insulation Current transformer.

The utility model embodiment provides a kind of current transformer of liquid silica gel fusion insulation, including：It is exhausted outside silicon rubber Edge shell, liquid silica gel interior insulation body, iron core and secondary winding, the secondary winding are uniformly wound on the iron core, are formed Two sub-cells, two sub-cell are placed in the silicon rubber external insulation shell, the silicon rubber external insulation shell with it is described Liquid silastic vacuum encapsulation is used between two sub-cells, forms the liquid silica gel interior insulation body, the silicon rubber external insulation There are a conducting wire cable-through holes for casing center position.

Further, a conducting wire cable-through hole is provided with shielding grading ring, and the shielding grading ring sets fusion and exists The inner wall of conducting wire cable-through hole.

Further, the material of the shielding grading ring is conductor or semiconductor.

Further, the shielding grading ring is made using conductive rubber, copper mesh or aluminium net.

Further, the material of the silicon rubber external insulation shell uses heat vulcanized silicone rubber.

Further, the heat vulcanized silicone rubber includes dimethyl silicone rubber, the dilute base silicon rubber of methyl second, the dilute base of methyl second Phenyl siloxane rubber or the dilute base trifluoro propyl silicon rubber of methyl second.

Further, the material of the liquid silica gel interior insulation body uses addition vulcanization type silicon rubber.

Further, the material of the iron core uses cold rolled silicon steel band, non-crystaline amorphous metal or permalloy.

Further, the secondary wiring exit of the silicon rubber external insulation shell has outwardly extending insulation tower group, The insulation tower group is inserted with secondary wiring conduit.

Further, the secondary wiring conduit is telescopic secondary wiring conduit.

The utility model embodiment makes silicon rubber external insulation shell using silicon rubber, and technique makes simple, insulation thickness Unanimously, stable and reliable for performance, shorten the production cycle, reduces energy consumption, low-carbon environment-friendly；Embedding liquid silastic and the silicon being fabricated to Rubber external insulation shell is same type of material, and the two compatibility is good, is not in air gap, can effectively solve the problems, such as shelf depreciation.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also It can be obtain other attached drawings according to these attached drawings.

Fig. 1 is the facing structure signal of the current transformer for the liquid silica gel fusion insulation that the utility model embodiment provides Figure；

Fig. 2 is the plan structure signal of the current transformer for the liquid silica gel fusion insulation that the utility model embodiment provides Figure；

Fig. 3 is the A-A schematic cross-sectional views in Fig. 1；

1- silicon rubber external insulation shells；2- liquid silica gel interior insulation bodies；3- iron cores；

4- secondary windings；5- shields grading ring；6- secondary wiring conduits.

Specific implementation mode

It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment carries out clear, complete description, it is clear that retouched to the technical scheme in the embodiment of the utility model The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts belong to The range of the utility model protection.

In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand For limitations of the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, on can understanding as the case may be State the concrete meaning of term in the present invention.

Fig. 1 is the facing structure signal of the current transformer for the liquid silica gel fusion insulation that the utility model embodiment provides Figure；Fig. 2 is the overlooking structure diagram of the current transformer for the liquid silica gel fusion insulation that the utility model embodiment provides；Figure 3 be the A-A schematic cross-sectional views in Fig. 1.As shown in Figure 1, Figure 2, Figure 3 shows, the liquid silica gel that the utility model embodiment provides Merge the current transformer of insulation, including silicon rubber external insulation shell 1, liquid silica gel interior insulation body 2, iron core 3 and secondary winding 4, the secondary winding 4 is uniformly wound on the iron core 3, forms two sub-cells, and two sub-cell is placed on the silicon rubber In glue external insulation shell 1, filled using liquid silastic vacuum between the silicon rubber external insulation shell 1 and two sub-cell Envelope, forms the liquid silica gel interior insulation body 2, there are a conducting wire cable-through holes for 1 center of silicon rubber external insulation shell.

Further, it is based on above-described embodiment, a conducting wire cable-through hole is provided with shielding grading ring 5, the shielding Grading ring 5 sets the inner wall merged in a conducting wire cable-through hole.The shielding grading ring 5 can play shielding and uniformly electricity The effect of field, can further decrease partial discharge quantity, to further improve electric property.

Further, it is based on above-described embodiment, the material of the shielding grading ring 5 is conductor or semiconductor.

Further, be based on above-described embodiment, the shielding grading ring 5 using conductive rubber, copper mesh or aluminium net making and At.

Further, it is based on above-described embodiment, the material of the silicon rubber external insulation shell 1 uses heat vulcanized silicone rubber.

Further, it is based on above-described embodiment, the heat vulcanized silicone rubber includes dimethyl silicone rubber, the dilute base silicon of methyl second The dilute base phenyl siloxane rubber of rubber, methyl second or the dilute base trifluoro propyl silicon rubber of methyl second.

Further, it is based on above-described embodiment, the material of the liquid silica gel interior insulation body 2 uses addition vulcanization type silicon rubber Glue.

Further, it is based on above-described embodiment, the material of the iron core 3 uses cold rolled silicon steel band, non-crystaline amorphous metal or slope Not alloy.

Further, it is based on above-described embodiment, the secondary wiring exit of the silicon rubber external insulation shell 1 has outward The insulation tower group of extension, prevents from discharging；The insulation tower group is inserted with secondary wiring conduit 6, the convenient guiding to secondary wiring.

Further, it is based on above-described embodiment, the secondary wiring conduit 6 is telescopic secondary wiring conduit, described Secondary wiring conduit 6 is telescopic tube, is adapted to the on-pole switch of different model.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that： It still can be with technical scheme described in the above embodiments is modified, or is carried out to which part technical characteristic etc. With replacement；And these modifications or replacements, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution The spirit and scope of scheme.

Claims

1. a kind of current transformer of liquid silica gel fusion insulation, which is characterized in that including：Silicon rubber external insulation shell, liquid Silica gel interior insulation body, iron core and secondary winding, the secondary winding are uniformly wound on the iron core, form two sub-cells, institute It states two sub-cells to be placed in the silicon rubber external insulation shell, between the silicon rubber external insulation shell and two sub-cell Using liquid silastic vacuum encapsulation, the liquid silica gel interior insulation body, the silicon rubber external insulation casing center position are formed There are a conducting wire cable-through holes.

2. the current transformer of liquid silica gel fusion insulation according to claim 1, which is characterized in that a conducting wire Cable-through hole is provided with shielding grading ring, and the shielding grading ring sets the inner wall merged in a conducting wire cable-through hole.

3. the current transformer of liquid silica gel fusion insulation according to claim 2, which is characterized in that the shielding is pressed The material of ring is conductor or semiconductor.

4. the current transformer of liquid silica gel fusion insulation according to claim 3, which is characterized in that the shielding is pressed Ring is made using conductive rubber, copper mesh or aluminium net.

5. the current transformer of liquid silica gel fusion insulation according to claim 1, which is characterized in that outside the silicon rubber The material of insulation shell uses heat vulcanized silicone rubber.

6. the current transformer of liquid silica gel fusion insulation according to claim 5, which is characterized in that the heat cure silicon Rubber includes dimethyl silicone rubber, the dilute base silicon rubber of methyl second, the dilute base phenyl siloxane rubber of methyl second or the dilute base trifluoropropyl of methyl second Base silicon rubber.

7. the current transformer of liquid silica gel fusion insulation according to claim 1, which is characterized in that the liquid silica gel The material of interior insulation body uses addition vulcanization type silicon rubber.

8. the current transformer of liquid silica gel fusion insulation according to claim 1, which is characterized in that the material of the iron core Material uses cold rolled silicon steel band, non-crystaline amorphous metal or permalloy.

9. the current transformer of liquid silica gel fusion insulation according to claim 1, which is characterized in that outside the silicon rubber There is outwardly extending insulation tower group, the insulation tower group to be inserted with secondary wiring and lead in the secondary wiring exit of insulation shell Pipe.

10. the current transformer of liquid silica gel according to claim 9 fusion insulation, which is characterized in that described secondary to lead Wire conduit is telescopic secondary wiring conduit.