Membrane for electromagnetic control valve of water supply and irrigation system and processing method

Abstract

The invention discloses a membrane for an electromagnetic control valve of a water supply and irrigation system. The membrane is prepared from the following components in parts by weight: 60-70 parts of an ethylene propylene terpolymer, 20-30 parts of nitrile rubber, 22-26 parts of chlorinated polyethylene, 4-8 parts of an activator, 2-4 parts of an anti-ager, 20-30 parts of carbon black, 6-8 parts of a vulcanizing agent, 4-6 parts of a plasticizer, 6-10 parts of a vulcanization accelerator, 2-4 parts of a coupling agent, 12-16 parts of carbon microspheres, 6-10 parts of a urea formaldehyde polymer, 5-8 parts of hexamethylenetetramine, 2-5 parts of octadecanol and 6-10 parts of talcum powder. The ethylene propylene terpolymer is taken as a main body and matched with the nitrile rubber and the chlorinated polyethylene, so that the rubber membrane has good high temperature resistance, ozone aging resistance, chemical resistance, oil resistance, corrosion resistance and wear-resisting property under the premise of ensuring the tensile strength and the tearing strength. The membrane has good shock resistance, good dynamic property, good oil resistance, wear-resisting property and long service life.

Description

technical field [0001] The invention relates to the technical fields of rubber products and chemical industry, in particular to a diaphragm for an electromagnetic control valve of a water supply and irrigation system and a processing method thereof. Background technique [0002] Rubber diaphragms are mainly used in valves, regulating valves, automatic mechanical follow-up devices, switches and counters for flow, pressure, differential, liquid level, constant temperature volume heat compensation, etc. Its advantages lie in high working reliability, good recombination, long working life and low cost. [0003] However, the diaphragms used in the existing electromagnetic control valves of water supply and irrigation systems are often subjected to water pressure shocks and are prone to damage, resulting in the failure of the control valves to work normally. Moreover, the oil resistance and wear resistance of the existing diaphragms for control valves are poor, and the physical a...

AI Technical Summary

Problems solved by technology

[0003] However, the existing diaphragms for electromagnetic control valves in water supply and irrigation systems are often impacted by water pressure and are prone to damage, resulting in the failure of the control valves to work normally.

Moreover, the oil resistance and wear resistance of the existing control valve diaphragms are poor, and the physical and mechanical properties of the diaphragms need to be improved.