CN203386567U - Oil-immersed distribution transformer - Google Patents
Oil-immersed distribution transformer Download PDFInfo
- Publication number
- CN203386567U CN203386567U CN201320290216.7U CN201320290216U CN203386567U CN 203386567 U CN203386567 U CN 203386567U CN 201320290216 U CN201320290216 U CN 201320290216U CN 203386567 U CN203386567 U CN 203386567U
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- iron core
- oil
- fuel tank
- winding
- transformer
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Abstract
The utility model discloses an oil-immersed distribution transformer, comprising iron core devices, windings, coils, an oil tank, a cooling device, a safety device, insulation casings and a pressure regulating device, wherein the iron core devices and the windings are arranged in the oil tank, the cooling device is connected with one end of the oil tank, the insulation casings are arranged between the coils and the oil tank, the pressure regulating device is connected to the iron core devices and the windings, the safety device is connected to the oil tank, each iron core device comprises an iron core, a columnar iron yoke and a clamping device, the iron cores are sleeved and wound on the windings, and the oil tank is provided with corrugated sheets. The corrugated sheets are used for replacing an oil storage tank, so oil in the transformer is isolated from the outside, thus the entering of oxygen and moisture can be effectively prevented, and degradation of the insulation performance is avoided. The oil-immersed distribution transformer has the advantages of good insulation property, good thermal conductivity, large capacity, good heat dissipation, low maintenance cost and long service life.
Description
Technical field
The utility model relates to a kind of oil immersion-type distribution transformer.
Background technology
The ampere-turn skewness of the winding of existing transformer; leakage field is large, and mechanical strength is low, a little less than the chaff short-circuit capacity; can not well protect the machine operation; iron core and winding do not adopt security measure in addition, and the volume of transformer is large, can not bear the top shake of transportation; inner moisture weight; affect transformer performance, useful life is short, and maintenance cost is high.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of good insulation preformance, good heat conductivity, large capacity good heat dissipation, and maintenance cost is low, the oil immersion-type distribution transformer of long service life.
For addressing the above problem, the utility model adopts following technical scheme: a kind of oil immersion-type distribution transformer, comprise iron core apparatus, winding, coil, fuel tank, cooling device, safety guard, insulating sleeve and regulator, described iron core apparatus and winding are placed in fuel tank, described cooling device connects an end of fuel tank, described insulating sleeve is between coil and fuel tank, and described regulator is connected with iron core apparatus, winding, and described safety guard is connected with fuel tank; Described iron core apparatus comprises that iron core, post iron grips and apparatus for fastening, and described iron core sleeve is on winding, and described fuel tank is provided with corrugated plate.
As preferably, described apparatus for fastening comprises insulated conductor and insulating part, and described insulating part comprises the main insulation part and from insulating part; Described insulated conductor is set to round conductor.
As preferably, described cooling device comprises cooling air pipeline and public attention equipment.
As preferably, described safety guard comprises pressure relief valve and Buchholz relay.
The beneficial effect of the utility model oil immersion-type distribution transformer is: because described oil immersion-type distribution transformer adopts circular copper wire winding, make it the ampere-turn distribution equilibrium of winding, leakage field is little, and mechanical strength is high, and anti-short circuit capability is strong; Described fuel tank adopts corrugated plate, and it has respiratory function and compensates because variations in temperature causes oily change in volume, so this product does not have oil conservator, has significantly reduced the height of transformer; Because corrugated plate has replaced oil conservator, transformer oil is isolated from the outside, like this with regard to effectively preventing oxygen, entering of moisture content and cause the decline of insulation property; It has advantages of that good insulation preformance, good heat conductivity, large capacity good heat dissipation, maintenance cost are low, long service life.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model oil immersion-type distribution transformer.
Embodiment
Consult shown in Fig. 1, a kind of oil immersion-type distribution transformer, comprise iron core apparatus 1, winding 2, coil 3, fuel tank 4, cooling device 5, safety guard 6, insulating sleeve 7 and regulator (not shown), described iron core apparatus 1 and winding 2 are placed in fuel tank 4, described cooling device 5 connects an end of fuel tank 4, described insulating sleeve 7 devices are between coil 3 and fuel tank 4, and described regulator (not shown) is connected with iron core apparatus 1, winding 2, and described safety guard 6 is connected with fuel tank 4; Described iron core apparatus 1 comprises iron core, post iron grips and apparatus for fastening (all not shown), and described iron core sleeve is on winding, and described fuel tank 4 is provided with corrugated plate.
Described apparatus for fastening comprises insulated conductor and insulating part, and described insulating part comprises the main insulation part and from insulating part; Described insulated conductor is set to round conductor.Described cooling device 5 comprises cooling air pipeline 50 and public attention equipment 51.Described safety guard 6 comprises pressure relief valve (not shown) and Buchholz relay (not shown).
Described iron core apparatus 1 is to be built up by transformer silicon steel sheet, and the iron core of reel iron core transformer is formed by the silicon strip coiling.Its effect has 2 points: the one, form power frequency alternating flux Φ under the effect of primary coil alternating current; The 2nd, generate the electromotive force in secondary coil by the alternating flux in iron core, form low-tension supply.The main body of electric energy conversion that iron core has been electric energy---magnetic energy---.The main feature of oil immersion-type distribution transformer iron core is: transformer core adopts the cold rolling grain oriented silicon steel sheet of high magnetic conduction of laser photo-typesetting.The thickness of silicon steel sheet should be less than 0.35 millimeter.Core structure adopts 45 degree full bias seam and multistage lamination corner connection techniques, uses 6 grades of stepping laminations.Iron core is being sheared and lapping on full-automatic silicon steel sheet cutting and closed assembly streamline, to guarantee iron core, shears and the stacking technique requirement.
Described coil 3 generally forms with insulation flat type copper wire or circular copper wire coiling on winding former.Comprise once, two groups of secondaries (high pressure, low pressure).Primary winding is former limit electric energy to be introduced to a part in transformer complete the excitation process, and another part is filled up the electric energy in secondary coil, and secondary coil is that magnetic energy is converted to electric energy and sends out.Coil normally connects according to certain electric loop method of attachment (D corner connection or Y star connect).Coil winding requires the high and low pressure coil winding machine that adjustable permanent tension device is arranged, to guarantee the coiling tension force of wire turn.The transformer that product capacity is more than or equal to 200KVA should adopt paper tinsel formula low pressure winding.During coiling, the tension force of Copper Foil should reach 15-20N/mm2.Adopt Copper Foil because of without helical angle and the horizontal leakage field of reduction end winding, there is stronger transformer anti-short circuit capability.The transformer low voltage winding that product capacity is less than or equal to 160KVA should adopt the QQ-2 enameling copper strap wire.During coiling, the tension force of wire should reach 20-30N/mm2.Adopt the QQ-2 enameling copper strap wire because good insulation preformance, hardness are high, there is stronger transformer anti-short circuit capability.The high pressure winding while adopting the circle line, require to use the QQ-2 oxygen-free copper-wire and the time adopt wire to flatten technique, the contact area insulated with the hardness that strengthens wire and wire and layer.During coiling, the tension force of wire should reach 20-30N/mm2.Thereby there is stronger transformer anti-short circuit capability.Two-sided DDP mesh point glue insulating paper is used in the winding layers insulation, if low pressure paper tinsel formula winding must be used double-layer and double-side DDP mesh point glue insulating paper; With mechanical strength and the insulation insulation property that guarantee coil.For guaranteeing bulk strength and the manufacturability of device body winding, between iron core, low-voltage coil and high-tension coil, should coordinate closely, without packaging clearance technique.Suggestion is directly coiling on iron core, low-voltage coil, to strengthen the transformer anti-short circuit capability.Described fuel tank is equipped with insulation and the transformer oil of cooling use, with steel plate, is processed into, and requires mechanical strength high, is out of shape littlely, and weld is non-leakage.Adopt ripple struction, the crest height of corrugated tank must not be less than 120mm, and tank wall corrugated plate material should be used 1 ~ 1.2mm high strength cold rolled steel plate, and suggestion is used Baosteel ST12 or is equal to the flat cold-rolled sheet of the trade mark.The welding of fuel tank should be used the CO2 gas shielded welding to guarantee weldquality.The breathing amount of fuel tank should be greater than 1.3 times of the large expansion and contraction volume (25 ℃～105 ℃) of transformer oil, when 45 ℃ of ambient temperatures, under 1.5 times of running overloads of transformer condition of 1 hour, pressure relief valve is not answered oil spout, other position must not leakage of oil, or produces permanent deformation and damage.Fuel tank bottom sidewall must arrange and have the Dual-purpose valve of function of draining the oil and draw oil sample concurrently, and the seal approach that is no less than twice is arranged.Product is answered good seal, the ne-leakage phenomenon.The front leak test that dispatches from the factory is no less than 24 hours (corrugated fuel tank 315kVA and the following 20kPa of should bear, 400kVA and the above 15kPa that should bear) pressing time.Inner wall of oil tank should the brushing antirust paint, the surface treatment recommend adoption of fuel tank (more environmental protection, attractive in appearance) polyester plastic-blasting, and the build of plastic-blasting should be greater than 60um.
Described pressure relief valve is for preventing that the inner catastrophe failure that occurs of transformer from producing a large amount of gas, causes that transformer blasts.Pressure relief device is on the oil tank of transformer top cover, and pressure relief device is playing an important role aspect the protection power transformer.Be filled with the power transformer of transformer oil, if break down in inside or short circuit, arc discharge will make oil vaporization in moment, causes the tank pressure rising that is exceedingly fast.Discharge this pressure if can not be exceedingly fast, fuel tank will break, and inflammable oil spurts is arrived in very large zone, but fire hazard causes more havoc, thereby makes decompression in fuel tank prevent that above-mentioned situation from occurring by pressure relief device.
Described Buchholz relay is the protective device of transformer, is contained on the tube connector of fuel tank and conservator.The general oil-filled transformer of capacity more than 800kVA all has Buchholz relay.The effect of Buchholz relay is insulating oil to be decomposed when the fault such as insulation breakdown, seriously overheated, turn-to-turn short circuit, iron core short circuit occurs and produce gas when transformer is inner; or the fuel tank leakage of oil is while reducing pasta; send alarm signal or cut off the electricity supply to protect transformer to the person on duty, do not make fault enlarge.Can also take out the gas sample at Buchholz relay top exhaust valve port and be analyzed, in order to judge the power transformer interior fault situation simultaneously.
The above, be only embodiment of the present utility model, but protection range of the present utility model is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claims were limited.
Claims (4)
1. an oil immersion-type distribution transformer, it is characterized in that: comprise iron core apparatus, winding, coil, fuel tank, cooling device, safety guard, insulating sleeve and regulator, described iron core apparatus and winding are placed in fuel tank, described cooling device connects an end of fuel tank, described insulating sleeve is between coil and fuel tank, described regulator is connected with iron core apparatus, winding, and described safety guard is connected with fuel tank; Described iron core apparatus comprises that iron core, post iron grips and apparatus for fastening, and described iron core sleeve is on winding, and described fuel tank is provided with corrugated plate.
2. oil immersion-type distribution transformer according to claim 1, it is characterized in that: described apparatus for fastening comprises insulated conductor and insulating part, described insulating part comprises the main insulation part and from insulating part; Described insulated conductor is set to round conductor.
3. oil immersion-type distribution transformer according to claim 1, it is characterized in that: described cooling device comprises cooling air pipeline and public attention equipment.
4. oil immersion-type distribution transformer according to claim 1, it is characterized in that: described safety guard comprises pressure relief valve and Buchholz relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320290216.7U CN203386567U (en) | 2013-05-25 | 2013-05-25 | Oil-immersed distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320290216.7U CN203386567U (en) | 2013-05-25 | 2013-05-25 | Oil-immersed distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203386567U true CN203386567U (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320290216.7U Expired - Fee Related CN203386567U (en) | 2013-05-25 | 2013-05-25 | Oil-immersed distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203386567U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172018A (en) * | 2022-08-22 | 2022-10-11 | 江西恒通电气有限公司 | Adsorbed gas extracting device of oil-immersed power transformer |
| CN115172018B (en) * | 2022-08-22 | 2024-05-10 | 江西恒通电气有限公司 | Adsorption gas release device of oil immersed power transformer |
-
2013
- 2013-05-25 CN CN201320290216.7U patent/CN203386567U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172018A (en) * | 2022-08-22 | 2022-10-11 | 江西恒通电气有限公司 | Adsorbed gas extracting device of oil-immersed power transformer |
| CN115172018B (en) * | 2022-08-22 | 2024-05-10 | 江西恒通电气有限公司 | Adsorption gas release device of oil immersed power transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20160525 |