CN101847503A - Method for integrally sealing external insulation of current transformer by using silicon rubber - Google Patents
Method for integrally sealing external insulation of current transformer by using silicon rubber Download PDFInfo
- Publication number
- CN101847503A CN101847503A CN 201010196886 CN201010196886A CN101847503A CN 101847503 A CN101847503 A CN 101847503A CN 201010196886 CN201010196886 CN 201010196886 CN 201010196886 A CN201010196886 A CN 201010196886A CN 101847503 A CN101847503 A CN 101847503A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- spraying
- external insulation
- silicon rubber
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a method for integrally sealing the external insulation of a current transformer (CT) by using silicon rubber. The method comprises the following steps of: (1) cleaning the outer surface of a packaged CT coil; (2) spaying the outer surface of the CT coil by using spraying liquid so as to form a bottom layer which is 0.05 to 0.1mm thick; (3) after drying the bottom layer for 1 to 2 hours, and spraying the upper surface of the bottom layer to form one or more spraying layers, wherein the time interval between adjacent sprayings is 1 to 1.5 hours; and (4) when the total thickness of the spraying layers on the outer surface of the CT coil is greater than 0.25mm, stopping spraying so as to form a dense silicon rubber on the surface of the current transformer to finish integrally sealing the external insulation of the current transformer. The method for integrally sealing the external insulation of the current transformer by using the silicon rubber serves as the external insulation protection of the coil, and has the characteristics of high reliability, long service life, coil maintenance free and reduction of operation cost.
Description
Technical field
The invention belongs to the High-Voltage Electrical Appliances field, relate to a kind of guard method of current transformer external insulation, especially a kind of method with the silicon rubber integrally sealing external insulation of current transformer.
Background technology
The current transformer unit is as one of vitals of GIS, can be divided into built-in and two kinds of externals with regard to assembling form, and built-in finger CT coil is in the SF6 air chamber, and external refers to that the CT coil is in outside the SF6 air chamber.For external, the external insulation of CT coil adopts polyester film, the structure of latitude polyester adhesive tape and pyrocondensation belt wrapping is arranged, and is in for a long time in the atmospheric environment, is subjected to the influence of environment easily, as drench with rain, make moist, dust.Performance to the CT coil can exert an influence.Insulation resistance as coil reduces, and excitation property descends.
Summary of the invention
The objective of the invention is to current transformer surface insulation protective layer is adopted silicon rubber material integrally closed, coil is played moistureproof dustproof effect, make coil performance more stable.
Technical scheme of the present invention comprises: the outermost layer of current transformer outsourcing insulation is evenly sprayed with fluid silicone rubber, make the surface form the silicon rubber protective layer of one deck densification.
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of method with the silicon rubber integrally sealing external insulation of current transformer is provided, according to following steps: the CT coil outer surface that (1) cleaning bandages; (2) use spray coating liquor to form bottom in the spraying of CT coil outer surface, underlayer thickness is 0.05-0.1mm; (3) when bottom after dry 1-2 hour, spray on bottom, form one or more layers sprayed coating, the time interval of adjacent spraying is 1-1.5 hour; (4) when the sprayed coating gross thickness of CT coil outer surface greater than 0.25 millimeter, stop spraying, make the current transformer surface form the silicone rubber coating of one deck densification, finish the integrally closed of current transformer external insulation.
Described spray coating liquor is to be 5: 1 composition of proportions according to volume ratio by fluid silicone rubber and dimethylbenzene.
Described spraying is meant uses spray gun that spray coating liquor is sprayed; The nozzle diameter of described spray gun is that the air pressure of φ 0.5mm, spray gun is that the ambient temperature of 0.4MPa-0.6MPa, spraying is controlled at 10 ℃-35 ℃, humidity and is controlled at 35%-80%.Fluid silicone rubber is by generating the surface nature that a hydrophobic material surface changes the CT coil, thereby blocks flashover mechanism in early days, prevents the formation of conductivity moisture film, restriction and successful control surface leakage current.Use arc resistant to puncture additive and come the control surface temperature, avoid under high electrical activity, surface damage occurring.The fluid silicone rubber material can be guaranteed contact-making surface realization seamless link, thus the flash burn of avoiding and electric arc.The not only environmental protection of this material, and have the remarkable quality of the extreme conditions such as high microthermal climate, rainwater or moisture of antifouling, hydrophobic, adaptation.
Selecting nozzle diameter is that the spray gun of φ 0.5mm is as spraying equipment.The air pressure of spray gun is controlled at 0.4MPa-0.6MPa.The ambient temperature of spraying is controlled at 10 ℃-35 ℃, and humidity is controlled at 35%-80%, surpasses this ambient temperature and humidity range, is not easy to spraying.
Method with the silicon rubber integrally sealing external insulation of current transformer of the present invention is protected as the external insulation of coil, and reliability height, long service life make coil non-maintaining, have reduced operation cost.
Description of drawings
Fig. 1 is the structure key diagram with silicon rubber material integrally closed technology; Fig. 2 is the spraying equipment scheme of installation.
Wherein: 1 is current transformer; 2 is silicone rubber coating; 3 is shielding cylinder; 4 is spray gun; 5 is air compressor; 6 is spray pump.
Embodiment
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:, earlier sequence number 1 current transformer is cast on sequence number 3 shielding cylinders referring to Fig. 1,2.The dust and the grease of sequence number 1 current transformer outer surface are thoroughly removed again, sequence number 2 fluid silicone rubbers are thoroughly stirred, (ratio is a silicon rubber: dimethylbenzene=100: 20) dilute to add a small amount of xylene solvent.Selecting nozzle diameter is that the spray gun of φ 0.5mm is as spraying equipment.Air hose is connected to sequence number 6 spray pump air inlets from sequence number 5 air compressors.With flexible pipe air outlet slit is linked to each other with sequence number 4 spray guns with outlet on sequence number 6 spray pumps.The air pressure of sequence number 4 spray guns is controlled at 0.4MPa-0.6MPa.The ambient temperature of spraying is controlled at 10 ℃-35 ℃, and humidity is controlled at 35%-80%, surpasses this ambient temperature and humidity range, is not easy to spraying.With sequence number 4 spray guns sequence number 2 fluid silicone rubbers are sprayed at sequence number 1 current transformer surface equably.To approach during the spraying bottom, can guarantee the adhesion of coating like this, and trickling not take place or streak occurs.Allow dry 1-2 hour of bottom.When bottom becomes sticky, spraying each layer thereafter.Thereafter each layer can be coated with thicker.The time interval between every layer of spraying made it reach effect tack-free and that solidify about 1 hour.Total cured thickness of silicon rubber must not be less than 0.25 millimeter.Make the current transformer surface form the silicone rubber coating of one deck densification.With the external insulation protection of the method as coil, coil is played moistureproof dustproof effect, make coil performance more stable.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (3)
1. the method with the silicon rubber integrally sealing external insulation of current transformer is characterized in that, according to following steps:
(1) cleans the CT coil outer surface that bandages;
(2) use spray coating liquor to form bottom in the spraying of CT coil outer surface, underlayer thickness is 0.05-0.1mm;
(3) when bottom after dry 1-2 hour, spray on bottom, form one or more layers sprayed coating, the time interval of adjacent spraying is 1-1.5 hour;
(4) when the sprayed coating gross thickness of CT coil outer surface greater than 0.25 millimeter, stop spraying, make the current transformer surface form the silicone rubber coating of one deck densification, finish the integrally closed of current transformer external insulation.
2. a kind of according to claim 1 method with the silicon rubber integrally sealing external insulation of current transformer is characterized in that: described spray coating liquor is to be 5: 1 composition of proportions according to volume ratio by fluid silicone rubber and dimethylbenzene.
3. a kind of according to claim 1 method with the silicon rubber integrally sealing external insulation of current transformer is characterized in that: described spraying is meant uses spray gun that spray coating liquor is sprayed; The nozzle diameter of described spray gun is that the air pressure of φ 0.5mm, spray gun is that the ambient temperature of 0.4MPa-0.6MPa, spraying is controlled at 10 ℃-35 ℃, humidity and is controlled at 35%-80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101968863A CN101847503B (en) | 2010-06-10 | 2010-06-10 | Method for integrally sealing external insulation of current transformer by using silicon rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101968863A CN101847503B (en) | 2010-06-10 | 2010-06-10 | Method for integrally sealing external insulation of current transformer by using silicon rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101847503A true CN101847503A (en) | 2010-09-29 |
| CN101847503B CN101847503B (en) | 2011-12-21 |
Family
ID=42772081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101968863A Active CN101847503B (en) | 2010-06-10 | 2010-06-10 | Method for integrally sealing external insulation of current transformer by using silicon rubber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101847503B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545068A (en) * | 2013-09-26 | 2014-01-29 | 国家电网公司 | Method for performing repairing renovation on surfaces of aged composite insulators |
| CN114914080A (en) * | 2022-05-25 | 2022-08-16 | 上海电洋材料科技有限公司 | High-low temperature impact heat treatment process for transformer coil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB913386A (en) * | 1959-09-18 | 1962-12-19 | Asea Ab | Corona protection screen for inductor coils of vacuum furnaces |
| JPS55146921A (en) * | 1979-05-02 | 1980-11-15 | Mitsubishi Electric Corp | Rubber molded stationary type induction apparatus |
| CN2534663Y (en) * | 2002-03-26 | 2003-02-05 | 顺德特种变压器厂 | Dry type current mutual inductor |
| CN2594949Y (en) * | 2003-01-22 | 2003-12-24 | 山东彼岸电力科技有限公司 | Dry high-voltage current mutual inductor |
| CN101540225A (en) * | 2009-03-24 | 2009-09-23 | 西安交通大学 | Method for preparing silicon rubber insulator super-hydrophobicity surface |
-
2010
- 2010-06-10 CN CN2010101968863A patent/CN101847503B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB913386A (en) * | 1959-09-18 | 1962-12-19 | Asea Ab | Corona protection screen for inductor coils of vacuum furnaces |
| JPS55146921A (en) * | 1979-05-02 | 1980-11-15 | Mitsubishi Electric Corp | Rubber molded stationary type induction apparatus |
| CN2534663Y (en) * | 2002-03-26 | 2003-02-05 | 顺德特种变压器厂 | Dry type current mutual inductor |
| CN2594949Y (en) * | 2003-01-22 | 2003-12-24 | 山东彼岸电力科技有限公司 | Dry high-voltage current mutual inductor |
| CN101540225A (en) * | 2009-03-24 | 2009-09-23 | 西安交通大学 | Method for preparing silicon rubber insulator super-hydrophobicity surface |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545068A (en) * | 2013-09-26 | 2014-01-29 | 国家电网公司 | Method for performing repairing renovation on surfaces of aged composite insulators |
| CN103545068B (en) * | 2013-09-26 | 2016-05-04 | 国家电网公司 | A kind of aging composite insulator carries out surface and repairs the method for renovating |
| CN114914080A (en) * | 2022-05-25 | 2022-08-16 | 上海电洋材料科技有限公司 | High-low temperature impact heat treatment process for transformer coil |
| CN114914080B (en) * | 2022-05-25 | 2024-05-24 | 上海电洋材料科技有限公司 | High-low temperature impact heat treatment process for transformer coil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101847503B (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9985245B2 (en) | Organic light emitting device, manufacturing method thereof and display device | |
| CN105470284B (en) | A kind of OLED screen body of thin-film package and preparation method thereof | |
| CN101847503B (en) | Method for integrally sealing external insulation of current transformer by using silicon rubber | |
| CN104128294B (en) | Large volume seamless steel gas cylinder inner spray coating device and technique thereof | |
| CN103545068B (en) | A kind of aging composite insulator carries out surface and repairs the method for renovating | |
| CN104882565A (en) | Film packaging structure and manufacture method thereof and display device | |
| CN104559792A (en) | Nano waterproof coating for electronic product and waterproof method thereof | |
| CN101392145A (en) | Electric power RTV surface functional coating | |
| CN104525451B (en) | Dry-type air-core reactor is the process for protecting of full surface dip-coating coatings before putting into operation | |
| CN103500621A (en) | Porcelain insulating surface processing method for electric transmission line | |
| CN205871403U (en) | Polyester film | |
| CN107686659A (en) | Mildewproof rubber | |
| CN103794668A (en) | PTFE two-side coated back plate and manufacturing method thereof | |
| CN103456475A (en) | Outdoor transformer with anti-ageing outer insulation layer | |
| CN104734030A (en) | Power distribution cabinet panel | |
| CN102862373A (en) | Method for preparing water-blocking tape with buffer mechanical stress | |
| CN205828015U (en) | A kind of high pressure dry porcelain full skirt sleeve pipe | |
| CN202307365U (en) | Power station composite pillar insulator core | |
| CN113363650A (en) | Battery core and power battery | |
| CN202126903U (en) | Dry-type discharge coil | |
| CN208622675U (en) | A kind of non-isolated non-transformation splits phase decompression device | |
| CN201916653U (en) | Back adhesive type heat-insulating component | |
| CN205303304U (en) | Vacuum circuit breaker's solid utmost point post buffering insulating layer structure of sealing | |
| CN105255232A (en) | Novel static var generator | |
| CN205376530U (en) | Thin film encapsulation's OLED screen body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |