Rubber sealing sleeve material of soft sealing gate valve with low compression deformation and preparation method

Abstract

The invention provides a rubber sealing sleeve material of a soft sealing gate valve with low compression and deformation. The rubber sealing sleeve material is prepared from the following raw materials in parts by weight: 45 to 55 parts of ethylene propylene diene methylene rubber, 10 to 20 parts of butadiene rubber, 1 to 3 parts of maleic anhydride, 2 to 6 parts of light-weight magnesium oxide, 3 to 6 parts of terpene resin, 5 to 10 parts of cashew nut oil modified phenolic resin, 2 to 5 parts of 1-di-(tert-butylperoxy)cyclohexane, 1 to 3 parts of triallyl isocyanurate, 2 to 4 parts of accelerant, 20 to 30 parts of reinforcing agent and 2 to 5 parts of vulcanizing agent. The invention also discloses a preparation method of the rubber sealing sleeve material. The prepared rubber sealing sleeve material has the advantages that the compression deformation is very low, the anti-aging property is good, the material is not easily deformed and aged after being used for a long time, the service life is prolonged by more than two times, the preparation technology is simple, the vulcanizing property is excellent, the sticking to a die in the vulcanizing process is avoided, and the rate of finished products is high.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to a low compression deformation soft-seal gate valve rubber sealing sleeve material and a preparation method. Background technique [0002] Gate valve is an indispensable control and regulation equipment in the water supply system, and it is mainly used in pipe network, pump room and filter tank, etc. In the 1970s, foreign countries began to adopt soft-sealed gate valves with all-inclusive rubber gates. In my country's "2010 Technological Progress Development Plan for Urban Water Supply Industry and 2020 Long-term Goals", it is proposed in the technical measures for equipment selection and operation management that valves below DN600 should be used as much as possible. Select soft-sealed valves, and gradually replace the old metal-seat-sealed gate valves on the pipe network. Rubber seal is the main soft seal form of medium and low pressure valves. The opening and closing p...

AI Technical Summary

Problems solved by technology

Rubber sealing sleeves for valves are generally dynamic seals. The stress on the rubber and the surrounding environment are complex, and it is easy to squeeze excessively to reduce the resilience, and it is also easy to wear and cause seal leakage.

Therefore, it is the main research direction at present to solve the problems that the quality of the rubber sealing sleeve of the soft-sealed gate valve is easy to age, permanent deformation occurs after long-term use, and the sealing effect is reduced.