In actual working conditions, the reliable operation of the safety touch edge is often disturbed by various factors in the environment. Fluctuations in temperature and humidity, accumulation of dust, erosion by corrosive substances, and impact of mechanical force may cause its sensitivity to decline, malfunction or even complete failure, which will pose a hidden danger to the normal operation of the equipment and on-site safety. The following is an analysis of several typical environmental scenarios (2):
The impact of high and low temperature environments on the safety touch edge cannot be ignored. In a low temperature environment, the shell of the touch edge may harden and the wire may easily break; in a high temperature environment, the shell may deform and a short circuit may occur. This is because the temperature resistance range of the material of the ordinary touch edge is relatively narrow, generally between -10℃ and 60℃, and if the touch edge is installed near a heat source, this effect will be aggravated. For low temperature environments, choose a touch edge that can withstand temperatures above -30℃; for high temperature environments, use silicone rubber materials and high temperature resistant wires, keep the touch edge away from heat sources, and add a heat insulation layer if necessary.
In a corrosive environment, the shell of the safety touch edge is easily damaged and the internal components may fail due to corrosion. This is because the touch edge is exposed to corrosive substances such as acid, alkali, and salt spray, and its material itself is not corrosion-resistant. Therefore, in acid and alkali environments, fluororubber material should be used with 316 stainless steel touch edges; in salt spray environments, chloroprene rubber touch edges are suitable, and protective baffles are installed at the same time, and the touch edges are cleaned regularly to reduce the adhesion of corrosive substances.
In environments with more mechanical shock or vibration, the safety touch edge may loosen and fall off, the wire is broken, and the signal is unstable. This is mainly due to the fact that the touch edge is not firmly fixed, there is no buffer structure, and the impact resistance is poor. The solution is to use a double fixation method of screws and buckles, reserve a buffer length of 2%-3% for the wire, and choose an enhanced touch edge with a thickened shell to improve the impact resistance of the touch edge.
