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Sealing gasket of transformer and preparation method thereof

A technology for gaskets and transformers, applied in the field of transformer parts, can solve problems such as easy aging, economic losses of power systems and users, and oil leakage from transformers.

Active Publication Date: 2015-01-28
ANHUI LANXIANG ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unstable mechanical properties or easy aging of the existing rubber gasket, the oil leakage of the transformer is caused, which seriously affects the service life of the transformer and causes huge economic losses to the power system and users.

Method used

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  • Sealing gasket of transformer and preparation method thereof

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preparation example Construction

[0013] The present invention provides a kind of preparation method of transformer gasket, and described preparation method comprises:

[0014] a. At 125-135°C, knead epichlorohydrin rubber, carbon black, silicone rubber, epoxy butyl stearate and expanded vermiculite to obtain the first mixture;

[0015] b. Add magnesium chloride, zinc stearate, nano-titanium dioxide, accelerator and anti-aging agent to the first mixture at 90-100°C and knead to obtain the second mixture;

[0016] c. kneading the second mixture and vulcanizing agent at 170-190° C. to perform vulcanization treatment to obtain a transformer gasket;

[0017] Wherein, relative to 100 parts by weight of the chlorohydrin rubber, the consumption of the carbon black is 7-11 parts by weight, the consumption of the silicone rubber is 40-60 parts by weight, and the consumption of the epoxy butyl stearate is 20-25 parts by weight, the consumption of the expanded vermiculite is 8-12 parts by weight, the consumption of the ...

Embodiment 1

[0031] a. At 130°C, mix 100kg of chlorohydrin rubber, 9kg of carbon black, 50kg of silicone rubber, 22kg of epoxy butyl stearate and 10kg of expanded vermiculite for 1.5 hours to obtain the first mixture; After heat treatment at 220°C for 2.5 hours and grinding, the particle size of expanded vermiculite is 1 mm; the weight average molecular weight of epichlorohydrin rubber is 70,000; the weight average molecular weight of silicone rubber is 40,000.

[0032] b. At 95°C, 3.5 kg of magnesium chloride, 20 kg of zinc stearate, 1 kg of nano-titanium dioxide, 1.3 kg of N-tert-butyl bis-2-benzothiazole sulfenic acid amine and 2,2,4-trimethyl - 0.8 kg of 1,2-dihydroquinoline was added to the first mixture and kneaded for 10 hours to prepare the second mixture; wherein, the particle size of the nano-titanium dioxide was 8 nm.

[0033] c. Knead the second mixture and 4 kg of tetraethylthiuram disulfide at 180° C. for 6 hours to perform vulcanization treatment to obtain transformer gasket...

Embodiment 2

[0036] a. At 125°C, mix 100kg of chlorohydrin rubber, 7kg of carbon black, 40kg of silicone rubber, 20kg of epoxy butyl stearate and 8kg of expanded vermiculite for 1 hour to obtain the first mixture; After heat treatment at 200°C for 2 hours and grinding, the particle size of expanded vermiculite is 0.5 mm; the weight average molecular weight of epichlorohydrin rubber is 50,000; the weight average molecular weight of silicone rubber is 20,000.

[0037] b. At 90°C, 3 kg of magnesium chloride, 15 kg of zinc stearate, 0.5 kg of nano-titanium dioxide, 1.2 kg of N-tert-butyl bis-2-benzothiazole sulfenic acid amine and 2,2,4-trimethyl - 0.5 kg of 1,2-dihydroquinoline was added to the first mixture and kneaded for 8 hours to prepare the second mixture; wherein, the particle size of nano-titanium dioxide was 5 nm.

[0038] c. Knead the second mixture and 3 kg of tetraethylthiuram disulfide at 170° C. for 5 hours to perform vulcanization treatment to obtain transformer gasket A2.

[...

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Abstract

The invention discloses a sealing gasket of a transformer and a preparation method thereof. The preparation method comprises the following steps: a, mixing epichlorohydrin rubber, carbon black, silicon rubber, epoxidized butyl stearate and expanded vermiculite at 125-135 DEG C to obtain a first mixture; b, adding magnesium chloride, zinc stearate, nano titanium dioxide, an accelerant and an anti-aging agent into the first mixture at 90-100 DEG C and mixing to obtain a second mixture; and c, mixing the second mixture with a vulcanizing agent at 170-190 DEG C so as to be vulcanized to obtain the sealing gasket of the transformer. The sealing gasket of the transformer has excellent mechanical and anti-aging performances and can be fully suitable for oil-immersed transformers.

Description

technical field [0001] The invention relates to transformer components, in particular to a transformer sealing gasket and a preparation method thereof. Background technique [0002] The gasket is an important part of the oil-immersed transformer, which plays the role of sealing and preventing oil leakage of the transformer. Due to unstable mechanical properties or easy aging of existing rubber gaskets, oil leakage from transformers is caused, which seriously affects the service life of transformers and causes huge economic losses to power systems and users. Contents of the invention [0003] The object of the present invention is to provide a kind of transformer gasket and its preparation method, the transformer gasket obtained by this method has excellent tensile strength, tear elongation, tear strength and anti-aging performance, and the method is simple in steps , the raw material is easy to get. [0004] In order to achieve the above object, the invention provides a ...

Claims

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Application Information

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IPC IPC(8): C08L71/00C08L83/04C08K13/02C08K3/04C08K5/1515C08K3/34C08K3/16C08K5/098C08K3/22C09K3/10
Inventor 姚强付丽琴吴兆祥
Owner ANHUI LANXIANG ELECTRICAL EQUIP
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