Rubber sealing ring used for GIS composite apparatus and production method thereof

Abstract

The invention relates to a rubber sealing ring used for a GIS composite apparatus and a preparation method thereof. The rubber sealing ring is produced by steps of plasticating, banburying and mixing on the following raw materials in parts by weight: 100 parts of ethylene-propylene-diene monomer, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 20-25 parts of high-wear resistant carbon black, 30-35 parts of spray carbon black, 6-8 parts of dioctyl sebacate, 0.5-1 part of an antioxidant MB, and 2-3 parts of a vulcanizing agent BIPB. The product has extremely low permanent compression set value, the actual measurement value is 10%, which is lower than the requirement of less than or equal to 25% in JB / T7052-1993, longer life is guaranteed; the brittleness is abnormal at the temperature of -60 DEG C, so that the usage performance and life of the product at low temperature are guaranteed; the product is tolerable 40% of hydrofluoric acid for 48 hours and the performance has no change; and the aged life assessment of the sealing ring can reach as high as 55.6 years.

Description

technical field

[0001] The invention relates to the distribution of an O-shaped rubber sealing ring for a GIS combined electrical appliance, belonging to the technical field of rubber materials. Background technique

[0002] The live parts of GIS combined electrical appliances are all sealed in SF6 gas. The existing combined electrical appliances are basically sealed with O-shaped rubber sealing rings, so the sealing performance of the sealing rings is very important for the operation of the high-voltage switch of combined electrical appliances. In order to ensure the stability of the power system, the power system requires less maintenance or even maintenance-free for various switches. Today, the design life of combined electrical appliances is required to be maintenance-free for more than 30 years, which puts forward the long-term life of the O-shaped rubber seal ring that plays the main sealing role higher requirements. Contents of the invention

[0003] The purpose of...

Examples

Embodiment 1

[0022] The rubber sealing ring for GIS combined electrical appliances is made of the following raw materials by weight: 100 parts of EPDM rubber; 5 parts of zinc oxide; 1 part of stearic acid; 25 parts of high wear-resistant carbon black; 30 parts of spray carbon black 6 parts of dioctyl sebacate; 1 part of antioxidant MB; 2.5 parts of vulcanizing agent BIPB.

[0023] The preparation method comprises the following steps:

[0024] (1) Weighing and batching according to the above ratio, and then put the weighed EPDM raw rubber into the internal mixer for 5 minutes to make the raw rubber obtain sufficient fluidity;

[0025] (2) Add zinc oxide, stearic acid, carbon black and other raw materials except vulcanizing agent to the above plasticized raw rubber, and continue banburying for 10 minutes to ensure that various raw materials are mixed evenly;

[0026] (3) Take out the mixed rubber material from the internal mixer, put it into the open mixer and pass it 5 times, so that the r...

Embodiment 2

[0029] The rubber sealing ring for GIS combined electrical appliances is made of the following raw materials by weight: 100 parts of EPDM rubber; 5 parts of zinc oxide; 1 part of stearic acid; 20 parts of high wear-resistant carbon black; 30 parts of spray carbon black ; 8 parts of dioctyl sebacate; 0.5 parts of antioxidant MB; 2.5 parts of vulcanizing agent BIPB.

[0030] The preparation method comprises the following steps:

[0031] (1) Weighing and batching according to the above ratio, and then put the weighed EPDM raw rubber into the mixer for 3 minutes to make the raw rubber obtain sufficient fluidity;

[0032] (2) Add zinc oxide, stearic acid, carbon black and other raw materials except vulcanizing agent to the above-mentioned plasticized raw rubber, and continue banburying for 5 minutes to ensure that various raw materials are mixed evenly;

[0033] (3) Take out the mixed rubber material from the internal mixer, put it into the open mixer and pass it through for 3 tim...

Embodiment 3

[0036] A rubber sealing ring for GIS combined electrical appliances, made of the following raw materials in parts by weight: 100 parts of EPDM rubber; 3 parts of zinc oxide; 2 parts of stearic acid; 20 parts of high wear-resistant carbon black; spray carbon black 30 parts; 8 parts of dioctyl sebacate; 1 part of antioxidant MB; 2 parts of vulcanizing agent BIPB.

[0037] The preparation method is the same as in Example 1.

technical field

[0001] The invention relates to the distribution of an O-shaped rubber sealing ring for a GIS combined electrical appliance, belonging to the technical field of rubber materials. Background technique

[0002] The live parts of GIS combined electrical appliances are all sealed in SF6 gas. The existing combined electrical appliances are basically sealed with O-shaped rubber sealing rings, so the sealing performance of the sealing rings is very important for the operation of the high-voltage switch of combined electrical appliances. In order to ensure the stability of the power system, the power system requires less maintenance or even maintenance-free for various switches. Today, the design life of combined electrical appliances is required to be maintenance-free for more than 30 years, which puts forward the long-term life of the O-shaped rubber seal ring that plays the main sealing role higher requirements. Contents of the invention

[0003] The purpose of...

Examples

Embodiment 1

[0022] The rubber sealing ring for GIS combined electrical appliances is made of the following raw materials by weight: 100 parts of EPDM rubber; 5 parts of zinc oxide; 1 part of stearic acid; 25 parts of high wear-resistant carbon black; 30 parts of spray carbon black 6 parts of dioctyl sebacate; 1 part of antioxidant MB; 2.5 parts of vulcanizing agent BIPB.

[0023] The preparation method comprises the following steps:

[0024] (1) Weighing and batching according to the above ratio, and then put the weighed EPDM raw rubber into the internal mixer for 5 minutes to make the raw rubber obtain sufficient fluidity;

[0025] (2) Add zinc oxide, stearic acid, carbon black and other raw materials except vulcanizing agent to the above plasticized raw rubber, and continue banburying for 10 minutes to ensure that various raw materials are mixed evenly;

[0026] (3) Take out the mixed rubber material from the internal mixer, put it into the open mixer and pass it 5 times, so that the r...

Embodiment 2

[0029] The rubber sealing ring for GIS combined electrical appliances is made of the following raw materials by weight: 100 parts of EPDM rubber; 5 parts of zinc oxide; 1 part of stearic acid; 20 parts of high wear-resistant carbon black; 30 parts of spray carbon black ; 8 parts of dioctyl sebacate; 0.5 parts of antioxidant MB; 2.5 parts of vulcanizing agent BIPB.

[0030] The preparation method comprises the following steps:

[0031] (1) Weighing and batching according to the above ratio, and then put the weighed EPDM raw rubber into the mixer for 3 minutes to make the raw rubber obtain sufficient fluidity;

[0032] (2) Add zinc oxide, stearic acid, carbon black and other raw materials except vulcanizing agent to the above-mentioned plasticized raw rubber, and continue banburying for 5 minutes to ensure that various raw materials are mixed evenly;

[0033] (3) Take out the mixed rubber material from the internal mixer, put it into the open mixer and pass it through for 3 tim...

Embodiment 3

[0036] A rubber sealing ring for GIS combined electrical appliances, made of the following raw materials in parts by weight: 100 parts of EPDM rubber; 3 parts of zinc oxide; 2 parts of stearic acid; 20 parts of high wear-resistant carbon black; spray carbon black 30 parts; 8 parts of dioctyl sebacate; 1 part of antioxidant MB; 2 parts of vulcanizing agent BIPB.

[0037] The preparation method is the same as in Example 1.

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