Fatigue-resistant water-swelling rubber ring

Abstract

The invention relates to a water-swelling rubber ring which comprises a water-swelling rubber ring body, wherein a first check ring protruding outwards is arranged at one end of the water-swelling rubber ring body, and a second check ring protruding outwards is arranged in the middle of the water-swelling rubber ring body; the water-swelling rubber ring body is prepared from the following raw materials in parts by weight: 10 to 100 parts of natural rubber, 10 to 100 parts of chloroprene rubber, 10 to 80 parts of polyacrylamide, 20 to 60 parts of superfine calcium carbonate, 0.5 to 10 parts of dicumyl peroxide, 0.5 to 10 parts of magnesium oxide, 0.1 to 10 parts of an accelerant DETU, 0.5 to 10 parts of zinc oxide, 0.5 to 10 parts of stearic acid and 0.5 to 20 parts of chlorinated polyethylene. Compared with the prior art, the fatigue-resistant water-swelling rubber ring disclosed by the invention has the advantages of higher mechanical property, excellent water absorption swelling rate, excellent fatigue resistance, capability of repeatedly absorbing water and swelling for more than 25 times, good sealing property, no leakage. The rubber ring can be widely applied to complex environments such as various tunnels, underground and underwater engineering or environments where the rubber ring is inconvenient to replace frequently.

Description

technical field [0001] The invention relates to sealing materials, in particular to a fatigue-resistant water-swellable rubber ring. Background technique [0002] The water-swellable rubber ring is made by putting rubber, water-absorbing resin and some additives into the rubber ring mold. It can maintain the high elasticity of the rubber and resist compression deformation while having the functions of water absorption and water retention. Therefore, it is often used in Drainage, tunnel and other places. However, the fatigue resistance of the water-swellable rubber rings currently on the market is relatively poor, resulting in a short service life, and the rubber rings cannot be frequently replaced with new rubber rings for buried drainage pipes, tunnels, etc., so restrictions the field of its application. [0003] Utility model patent CN201902752U reports "water-swellable rubber". The above-mentioned patent is provided with a first stop ring protruding outward at one end ...

AI Technical Summary

Problems solved by technology

However, the fatigue resistance of the water-swellable rubber is poor. Generally, the repeated water-swelling rate is lower than 250% when repeated water-swelling reaches 4-6 times, and the service life is short.

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