CN101814365B - Spraying process for preventing interphase short circuit of reactor - Google Patents

Abstract

The invention discloses a spraying process for preventing interphase short circuit of a reactor, which comprises the following steps of spraying zinc yellow primer and acrylic polyurethane gray paint after performing a conventional finishing procedure on the reactor, polishing and cleaning, completely wrapping a coil and a wiring terminal of the reactor, and spraying exposed metal parts of the reactor by using a special spray gun under the condition that the pressure is 0.6 +/-0.1 MPa: after the surface of the glue solution is vulcanized, performing second spraying; spraying repeatedly until the coating thickness reaches 2.5 + -0.5 mm. Meanwhile, edges and corners with relatively weak spraying thickness are brushed and strengthened. The reactor sprayed by the process can effectively avoid the interphase short circuit accident of the reactor caused by the climbing of birds and beasts, can be used for the production of the reactor, can also be used for transforming the reactor running in a transformer substation, can be transformed without large-scale equipment such as hoisting and the like, and is convenient and easy to operate.

Description

A kind of spraying coating process that prevents interphase short circuit of reactor

Technical field

The present invention relates to the reactor production technology, specifically relate to a kind of spraying coating process that prevents interphase short circuit of reactor.

Background technology

Along with the quickening of China's power grid construction speed, the expansion of scale, transformer station is also increasing.Operating in open air in the transformer station in recent years stacks type hollow series reactor, current limiting reactor and toys such as yellow weasel, cat frequently take place gets into climbing and cause equipment breakdowns such as series reactor, current limiting reactor phase fault, turn-to-turn short circuit to take place; Have a strong impact on the safe operation of electrical network, caused unnecessary economic loss for power department and vast power consumer.And in the prior art this generally there is not yet better solution; Only be outer wall brushing one deck insulating varnish, but this kind method still can not be stopped to get into the generation that climbing causes equipment breakdowns such as series reactor, current limiting reactor phase fault, turn-to-turn short circuit because of toy at reactor.

Summary of the invention

To the problems referred to above that exist in the prior art; The invention provides a kind of spraying coating process that prevents interphase short circuit of reactor,, can avoid effectively because the interphase short circuit of reactor accident that the birds and beasts climbing causes through the reactor of this kind technology spraying; Not only can be used for the production of reactor; Also can transform, main equipment such as need not lift by crane and can accomplish transformation the reactor that operates in the transformer station, and easy to operate.

A kind of spraying coating process that prevents interphase short circuit of reactor of the present invention comprises the step of following order:

(1) finishing, polishing, cleaning are carried out conventional finishing process earlier to reactor, with sand papering, star-like each star arm of cleaning, polish wedge angle and burr on star-like then, blow off the dust that produces because of polishing with air pump;

(2) spray paint after above-mentioned steps (1) finishes spray zinc chromate primer and acroleic acid polyurethane ash paint;

(3) after polishing, cleaning treat that zinc chromate primer that above-mentioned steps (2) is sprayed and acroleic acid polyurethane ash paint thoroughly dry; Product surface is polished one time with fine sandpaper; With cotton yarn cleaning polishing vestige, guarantee clean, dustless, anhydrous and any conduction of product surface and surrounding environment or semiconductive material then;

(4) the spraying silicon rubber insulating paint wraps up the coil and the binding post of reactor fully, under certain pressure, uses special-purpose spray gun that the metal section and part that reactor exposes is sprayed; First pass spraying is accomplished, 10-20 minute at interval, treat the sulfuration of glue surface after, carry out second time spraying; Spray repeatedly up to reaching the coating layer thickness requirement; Go out three kinds of colors of three-phase respectively during last time spraying, spraying is accomplished.

In the such scheme, the spray pressure described in the step (4) is 0.6 ± 0.1Mpa.

In the such scheme, when in step (4), spraying, spray gun is 200-300mm apart from want spraying area.

In the such scheme, the coating layer thickness described in the step (4) is 2.5 ± 0.5mm.

In addition, even for guaranteeing coating thickness, reinforcement is brushed in the corner angle a little less than the coating thickness relative thin, corner handle.

The spraying coating process that the present invention is a kind of to prevent interphase short circuit of reactor compared with prior art has following advantage and effect:

1, the metal section and part that reactor exposes in the scheme; After comprising that star-like the metal flange process with the post insulator two ends sprays silicon rubber insulating paint; Silicon rubber insulating paint is equivalent to put one deck insulating sleeve to star-like the metal flange with the post insulator two ends closely attached to coating surface and with star-like the whole parcel of metal flange with the post insulator two ends.Form and reactor winding itself is with epoxy resin and the glass fiber yarn is wrapped, the metal section and part that exposes is through after the processing of silicon rubber insulating paint, and just being equivalent to reactor is an integral body, realizes the whole all insulation of reactor;

2, can stop the personal injury accident that the climbing of ubiquitous because toy causes in the transformer station short trouble and charged nude cause effectively, avoid causing unnecessary loss to power department and vast electric family;

3, operation is simple and feasible, can before reactor dispatches from the factory, carry out insulation processing to reactor, also can quickly and easily the reactor that has put into operation in the transformer station be transformed not employing large-scale lifting appliance.

Embodiment

Below in conjunction with specific embodiment the present invention is prevented that the spraying coating process of interphase short circuit of reactor is described in further detail.

(1) finishing, polishing, cleaning are carried out conventional finishing process earlier to reactor, and in polishing, spraying process, lifting, whereabouts product are careful, in order to avoid damage the outer curved binding post of sealing and bump.With star-like each star arm of sand papering cleaning, polish wedge angle and burr on star-like then, blow off the dust that polishing produces with air pump.

(2) spray paint after above-mentioned steps (1) cleaning finishes zinc chromate primer and acroleic acid polyurethane ash paint that the spray reactor is used.

(3) after polishing, cleaning treat that zinc chromate primer that above-mentioned steps (2) is sprayed and acroleic acid polyurethane ash paint thoroughly dry; Product surface is polished one time with fine sandpaper; With cotton yarn cleaning polishing vestige, guarantee clean, dustless, anhydrous and any conduction of product surface and surrounding environment or semiconductive material then.

(4) after the spraying silicon rubber insulating paint treats that zinc chromate primer and acroleic acid polyurethane ash paint dry, live reactor winding and binding post with useless film or disregard message paper bag, the spraying silicon rubber insulating paint.The spray silicon rubber insulating paint does not come off in case dope layer bubbles before not allowing zinc chromate primer and finish paint thoroughly not to parch.The spraying environment should keep dry dustless, anhydrous and any conduction or semiconductive material.Air compressor pressure is controlled at 0.6 ± 0.1Mpa, palpus jiggering before starting, and treat can use after the pressure stability.The appendix longest distance must not surpass 300 meters, and joint is solid and reliable, when line balance converter, should give fixingly, and spray gun should guarantee spray-hole, spray gun cylinder body and storage tank keeps clean, free from admixture and keep unimpeded.

During spraying, use the metal section and part that special-purpose spray gun exposes reactor (comprising star-like the metal flange with the post insulator two ends) to spray, require spraying evenly.Spray gun is apart from want spraying area 200-300mm during spraying.Should prevent large-area drip during spraying, smooth is answered on the surface that is sprayed.First pass spraying is accomplished, 10-20 minute at interval, treat the sulfuration of glue surface after, can carry out second time spraying.Spray repeatedly up to coating layer thickness 2.5mm ± 0.5mm and be advisable.After thickness to be sprayed reached, last was all over going out three kinds of colors of three-phase respectively.

Spraying can not have the silk of extension and lacquer knurl, all need be sprayed onto everywhere reactor star arm and flange, must not leak spray.Simultaneously the corner angle a little less than the coating thickness relative thin, corner are brushed and strengthen to handle: should brush repeatedly during brushing and keep evenly, surfacing is with after reaching 0.5 ± 0.1mm and being standard at every turn, and 20 minutes at interval, back and forth to reach thickness requirement.

Embodiment 1

Star-like the metal flange place with the post insulator two ends all handles with silicon rubber insulating paint at reactor, and spraying was 4～5 times when silicon rubber insulating paint was handled, and coating thickness is 2～3mm.

Climb in reactor at interval with shorting stub simulation toy, the shorting stub two ends are enclosed within star-like the star arm coating outside after the processing respectively.

Apply voltage 12.7kV according to test requirements document, it is constant to be raised to the back sustaining voltage, continues to cut off the electricity supply after 10 seconds, observes star-like outer top coat of shorting stub side and has or not breakdown point, repeats above-mentioned test three times.Result of the test such as table 1:

Table 1

Sequence number	Voltage (kV)	Duration (s)	Process has no abnormal	Appearance of coat after the off-test
					1	12.7	10	No abnormal	Outward appearance is normal, no breakdown point
2	12.8	10	No abnormal	Outward appearance is normal, no breakdown point
					3	12.6	10	No abnormal	Outward appearance is normal, no breakdown point

Apply voltage 42kV according to test requirements document, it is constant to be raised to the back sustaining voltage, continues to cut off the electricity supply after 10 seconds, observes star-like outer top coat of shorting stub side and has or not breakdown point, repeats above-mentioned test three times.Result of the test such as table 2:

Table 2

Sequence number	Voltage (kV)	Duration (s)	Process has no abnormal	Appearance of coat after the off-test
					1	42.3	10	No abnormal	Outward appearance is normal, no breakdown point
2	42.5	10	No abnormal	Outward appearance is normal, no breakdown point
					3	42.1	10	No abnormal	Outward appearance is normal, no breakdown point

In whole experiment, not hearing has abnormal voices such as creepage, discharge.After the off-test, the inspection coating surface is not found breakdown point, and outward appearance is normal.The reactor that the silicon rubber insulating paint coating that 2～3mm thickness is described can satisfy 10kV and 35kV electric pressure prevents the phase fault requirement.

Adopt spraying coating process of the present invention, can realize the whole all insulation of reactor, alternate even toy is climbed in reactor accidentally, can not cause the reactor short circuit yet.This technology not only can be applied to the production of reactor, simultaneously, also can transform easily the reactor that has put into effect.

Claims (2)

1. a spraying coating process that prevents interphase short circuit of reactor is characterized in that, comprises the step of following order:

(1) finishing, polishing, cleaning are carried out conventional finishing process earlier to reactor, with sand papering, star-like each star arm of cleaning, polish wedge angle and burr on star-like then, blow off the dust that produces because of polishing with air pump;

(2) spray paint after above-mentioned steps (1) finishes spray zinc chromate primer and acroleic acid polyurethane ash paint;

(3) after polishing, cleaning treat that zinc chromate primer that above-mentioned steps (2) is sprayed and acroleic acid polyurethane ash paint thoroughly dry; Product surface is polished one time with fine sandpaper; With cotton yarn cleaning polishing vestige, guarantee clean, dustless, anhydrous and any conduction of product surface and surrounding environment or semiconductive material then;

(4) the spraying silicon rubber insulating paint wraps up the coil and the binding post of reactor fully, under certain pressure, uses special-purpose spray gun that the metal section and part that reactor exposes is sprayed; First pass spraying is accomplished, 10-20 minute at interval, treat the sulfuration of glue surface after, carry out second time spraying; Spray repeatedly up to reaching the coating layer thickness requirement; Go out three kinds of colors of three-phase respectively during last time spraying, spraying is accomplished.

2. a kind of spraying coating process that prevents interphase short circuit of reactor according to claim 1 is characterized in that the coating layer thickness in the said step (4) is 2.5 ± 0.5mm.