CN209561108U - A kind of casing - Google Patents
A kind of casing Download PDFInfo
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- CN209561108U CN209561108U CN201920663035.1U CN201920663035U CN209561108U CN 209561108 U CN209561108 U CN 209561108U CN 201920663035 U CN201920663035 U CN 201920663035U CN 209561108 U CN209561108 U CN 209561108U
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- insulating layer
- graphite guide
- guide electric
- insulation shell
- electric layer
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Abstract
The utility model provides a kind of casing, including conductive rod and successively take shape in the first insulating layer, the first graphite guide electric layer and the insulation shell of conductive rod peripheral side, the first graphite guide electric layer and conductive rod are in electrical contact, the outer shielding structure of annular is embedded in the insulation shell, the outer shielding structure includes the second graphite guide electric layer of second insulating layer and the outer surface coated on second insulating layer, and the plain conductor with the electrical contact of the second graphite guide electric layer is fixed on the insulation shell.Shelf depreciation caused by the influence of temperature variation factors can be eliminated to the full extent, enable the casing suitable for the equipment of higher voltage, and structure is simple.
Description
Technical field
The utility model relates to electrical equipments, and in particular to for preventing a kind of casing of partial discharge.
Background technique
Partial discharge is the abbreviation of shelf depreciation, refers to generation between the electrodes but the not electric discharge of penetrating electrode, it be due to
Apparatus insulated inside occurs to repeat to puncture and put out under high electric-field intensity effect there are defect caused by weakness or production process
The phenomenon that going out.It shows as the insulate breakdown of interior gas, the partial breakdown of a small range solid or liquid medium or metal surface
Edge and corner potential field concentrate by force cause partial breakdown electric discharge etc..The energy of this electric discharge is very little, so its is short
When in the presence of the dielectric strength for having no effect on electrical equipment.If but part continuously emerges under working voltage and puts for insulation of electrical installation
Electricity, these faint electric discharges, which will generate cumulative effect, can be such that the dielectric properties of insulation gradually degrade and expand local defect, most
After lead to entire insulation breakdown.
In the extraction tube of the equipment such as electrical cabinet, the shelf depreciation of casing is mostly gap between two conductors, gas
Caused by bubble, as casing gauze screen and conductive rod between gap or bubble, subtle gap be primarily due to conductor material
The asynchronous caused constringency cleft that expands with heat and contract with cold of (such as gauze screen and conductive rod) and insulating materials (insulation shell).Therefore, it covers
The shelf depreciation of pipe is affected by temperature variation factors, the urgent need to resolve problem.
Utility model content
For this purpose, the utility model provides a kind of casing, the influence of temperature variation factors can be eliminated to the full extent and
Caused shelf depreciation enables the casing suitable for the equipment of higher voltage, and structure is simple.
To achieve the above object, the technical scheme that the utility model is provided is as follows:
A kind of casing including conductive rod and successively takes shape in the first insulating layer, the first graphite guide of conductive rod peripheral side
Electric layer and insulation shell, the first graphite guide electric layer and conductive rod are in electrical contact, and the outer of annular is embedded in the insulation shell
Shielding construction, the outer shielding structure include the second graphite of second insulating layer and the outer surface coated on second insulating layer
Layer, the plain conductor with the electrical contact of the second graphite guide electric layer is fixed on the insulation shell.
Further, first insulating layer, insulation shell are identical with the material of second insulating layer.
Further, the material of first insulating layer, insulation shell and second insulating layer is epoxy resin.
Further, the periphery wall of the insulation shell has further extended outward flange arrangement, and the outer shielding structure is corresponding
The position of flange arrangement.
Further, the flange arrangement has upper surface, lower end surface and the side end face for connecting upper surface and lower end surface,
The lower end surface of the flange arrangement mutually is recessed inwardly to form annular groove.
Further, the flange arrangement has upper surface, lower end surface and the side end face for connecting upper surface and lower end surface,
The plain conductor extends from the side end face of flange arrangement.
Further, the first graphite guide electric layer with a thickness of micron order thickness.
Further, the second graphite guide electric layer with a thickness of micron order thickness.
Further, the conductive rod is copper rod.
By technical solution provided by the utility model, have the following beneficial effects:
Structure by graphite guide electric layer (the first graphite guide electric layer, the second graphite guide electric layer) as gauze screen, graphite
The material of layer is more loose, can be good at being bonded on insulating materials, can realize complete one with insulating materials synchronization telescope
The thermal expansion coefficient of cause, effectively eliminate gauze screen and insulating materials shrink it is inconsistent caused by shelf depreciation caused by gap,
Shelf depreciation caused by the influence of elimination temperature variation factors to the full extent；Even if (first absolutely between multi-layer insulation
Edge layer, insulation shell and second insulating layer) thermal expansion coefficient it is inconsistent, and generate gap inside graphite guide electric layer, no
Shelf depreciation can be generated.Meanwhile first the contraction that is mainly used between screening conductive stick and the first insulating layer of graphite guide electric layer it is poor
Shelf depreciation caused by different generation gap, the second graphite guide electric layer are mainly used for shielding steel plate (switchgear inner panel or ground connection
Mounting plate) to the shelf depreciation of conductive rod.So that structure is more stable, it can be suitable for the equipment of higher voltage, and tie
Structure is simple.
Detailed description of the invention
Fig. 1 show the stereoscopic schematic diagram of embodiment middle sleeve；
Fig. 2 show the cross-sectional view of embodiment middle sleeve；
Fig. 3 show the partially exploded diagram of embodiment middle sleeve.
Specific embodiment
To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses
A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment
Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new
The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of casing provided in this embodiment shown in referring to FIG. 1, FIG. 2 and FIG. 3, including conductive rod 1 and successively take shape in
The first insulating layer 10, the first graphite guide electric layer 20 and the insulation shell 30 of 1 peripheral side of conductive rod, the first graphite guide electric layer 20
It is in electrical contact with conductive rod 1, the outer shielding structure of annular is embedded in the insulation shell 30, the outer shielding structure includes second
Second graphite guide electric layer 42 of insulating layer 41 and the outer surface coated on second insulating layer 41 is fixed on the insulation shell 30
With the plain conductor 43 of the second graphite guide electric layer 42 electrical contact, the plain conductor 43 is for being grounded.
Structure of the graphite guide electric layer (the first graphite guide electric layer 20, the second graphite guide electric layer 42) as gauze screen, graphite guide
The material of electric layer is more loose, can be good at being bonded on insulating materials, can realize complete with insulating materials synchronization telescope
Consistent thermal expansion coefficient, effectively eliminate gauze screen and insulating materials shrink it is inconsistent caused by locally put caused by gap
Electricity eliminates shelf depreciation caused by the influence of temperature variation factors to the full extent；Even if (first between multi-layer insulation
Insulating layer 10, insulation shell 30 and second insulating layer 41) thermal expansion coefficient it is inconsistent, and generated inside graphite guide electric layer
Gap will not generate shelf depreciation.Meanwhile first graphite guide electric layer 20 be mainly used for screening conductive stick 1 and the first insulating layer 10
Between difference in shrinkage generate and discharge caused by gap, the second graphite guide electric layer 42 is mainly used for shielding steel plate (in switchgear
Plate or the mounting plate of ground connection) electric discharge to conductive rod 1.So that structure is more stable, the equipment of higher voltage can be suitable for
In, and structure is simple.
Further, in the present embodiment, the material phase of first insulating layer 10, insulation shell 30 and second insulating layer 41
Together, the thermal expansion coefficient one of (the first insulating layer 10, insulation shell 30 and second insulating layer 41) between multi-layer insulation is realized
It causes, keeps structure more stable.
Again specifically, in the present embodiment, the material of first insulating layer 10, insulation shell 30 and second insulating layer 41 is equal
For epoxy resin, epoxy resin is to be usually used in preparing the material of insulation shell, good insulating, at low cost, technique in the prior art
It is mature.
In the prior art, epoxy resin generally uses APG (The Automatic Pressure Gelation) technique to pour
Prepared by note, heat cure forming temperature is at 135 degree to 160 degree when casting, but the causing factors of shelf depreciation are mainly APG work
Skill；In order to improve shelf depreciation, the technique that can use vacuum pouring, vacuum pouring temperature is low, slow curing, primary at the mould time
More than ten hour is wanted, so that shaping speed is slow, low efficiency.And by the structure of graphite guide electric layer in this programme, routine can be used
Technique (such as APG technique) preparation can also realize the voltage for improving and being applicable in partial discharge, and can be than the conventional technique using vacuum pouring
Effect is more preferable, while also reducing preparation process difficulty, improves efficiency.
Of course, in other embodiments, can also be prepared using other such as rubber insulating materials, compared with epoxy
The performance of the material of resin, moulding process or anti-partial discharge can be poor.
Further, in the present embodiment, the first graphite guide electric layer 20 is in electrical contact with conductive rod 1, specific mode
It is: first forms the first insulating layer 10 in the peripheral side of conductive rod 1, the molding of first insulating layer 10 can be complete by injection molding
The first graphite guide electric layer 20, and the first graphite guide are printed in the outer surface of the first insulating layer 10 at after the preparation of the first insulating layer 10
Electric layer 20 is in electrical contact at least one end with conductive rod 1, or is the first insulating layer 10 setting through-hole, the first graphite guide
Electric layer 20 is in electrical contact by through-hole and conductive rod 1.It is the upper end of the first graphite guide electric layer 20 and conduction in this specific embodiment
Stick 1 is in electrical contact, of course, not limited to this.So that the voltages such as the first graphite guide electric layer 20 and conductive rod 1, are used for screening conductive
Difference in shrinkage between stick 1 and the first insulating layer 10 generates discharges caused by gap.It is subsequent to prepare insulation shell 30 again.
Further, in the present embodiment, the preparation of the outer shielding structure first forms second insulating layer 41, then absolutely second
Print the second graphite guide electric layer 42 in the outer surface of edge layer 41.
Of course, in other embodiments, the preparation of the first graphite guide electric layer 20 and/or the second graphite guide electric layer 41 is not yet
It is confined to printing technology, it can also be using other such as spraying process in the prior art.
Further, in the present embodiment, the periphery wall of the insulation shell 30 has further extended outward flange arrangement 50, described
The position of outer shielding structure companion flange structure 50.Flange arrangement 50 be used for by the casing be fixed to steel plate (switchgear inner panel or
It is the mounting plate of ground connection) on, the position of outer shielding structure companion flange structure 50 can preferably shield steel plate (in switchgear
Plate or the mounting plate of ground connection etc.) electric discharge to conductive rod 1.
Further, in the present embodiment, the flange arrangement 50 has upper surface 51, lower end surface 52 and connection upper end
52 phase of lower end surface of the side end face 53 in face 51 and lower end surface 52, the flange arrangement 50 is recessed inwardly to form annular groove 521, should
Annular groove 521 can play the role of fixed seal ring, when installing to switchgear, so that the sealing between casing and switchgear
Performance can be more preferable.
Further, in the present embodiment, the plain conductor 43 extends from the side end face of flange arrangement 50 53, metal
Conducting wire 43 does not interfere external fixed structure, the i.e. lower end surface 52 of flange arrangement 50 and shielding steel plate (switchgear inner panel or ground connection
Mounting plate etc.) fixed connection structure.
Further, in the present embodiment, the first graphite guide electric layer 20 with a thickness of micron order thickness, printing can be passed through
One-pass molding, and structure is simple, compact.
Further, in the present embodiment, the second graphite guide electric layer 42 with a thickness of micron order thickness, printing can be passed through
One-pass molding, and structure is simple, compact.
Further, in the present embodiment, the conductive rod is copper rod, and copper is the material as conventional conductor, structure
Stabilization, conductive effect are good.Of course, in other embodiments, it can also be using the metal material of conductive energy.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (9)
1. a kind of casing, it is characterised in that: including conductive rod and successively take shape in conductive rod peripheral side the first insulating layer,
One graphite guide electric layer and insulation shell, the first graphite guide electric layer and conductive rod are in electrical contact, and are embedded in the insulation shell
The outer shielding structure of annular, the outer shielding structure includes the second of second insulating layer and the outer surface coated on second insulating layer
Graphite guide electric layer is fixed with the plain conductor with the electrical contact of the second graphite guide electric layer on the insulation shell.
2. casing according to claim 1, it is characterised in that: first insulating layer, insulation shell and second insulating layer
Material it is identical.
3. casing according to claim 2, it is characterised in that: first insulating layer, insulation shell and second insulating layer
Material be epoxy resin.
4. casing according to claim 1, it is characterised in that: the periphery wall of the insulation shell has further extended outward flange
Structure, the position of the outer shielding structure companion flange structure.
5. casing according to claim 4, it is characterised in that: the flange arrangement has upper surface, lower end surface and company
The side end face of end face and lower end surface is connected, the lower end surface of the flange arrangement mutually is recessed inwardly to form annular groove.
6. casing according to claim 4, it is characterised in that: the flange arrangement has upper surface, lower end surface and company
The side end face of end face and lower end surface is connected, the plain conductor extends from the side end face of flange arrangement.
7. casing according to claim 1, it is characterised in that: the first graphite guide electric layer with a thickness of micron order thickness
Degree.
8. casing according to claim 1, it is characterised in that: the second graphite guide electric layer with a thickness of micron order thickness
Degree.
9. casing according to claim 1, it is characterised in that: the conductive rod is copper rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920663035.1U CN209561108U (en) | 2019-05-10 | 2019-05-10 | A kind of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920663035.1U CN209561108U (en) | 2019-05-10 | 2019-05-10 | A kind of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209561108U true CN209561108U (en) | 2019-10-29 |
Family
ID=68313572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920663035.1U Active CN209561108U (en) | 2019-05-10 | 2019-05-10 | A kind of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209561108U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110010315A (en) * | 2019-05-10 | 2019-07-12 | 厦门耐德电气有限公司 | A kind of casing |
-
2019
- 2019-05-10 CN CN201920663035.1U patent/CN209561108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110010315A (en) * | 2019-05-10 | 2019-07-12 | 厦门耐德电气有限公司 | A kind of casing |
| CN110010315B (en) * | 2019-05-10 | 2024-02-02 | 厦门耐德电气有限公司 | Sleeve pipe |
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