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一、概述矿井提升设备在矿井生产中占有重要的地位。为此,煤矿安全规程对提升机的保护和闭锁提出严格要求。目前国内使用的大型矿井提升机,其电控系统中均设置了安全保护回路,按不同的保护环节,在其安全保护回路中串接有许多闭锁安全保护接点。一旦提升系统运转不正常,安全保护回路的某一接点、触头或限位开关动作,使保护回路瞬时断电,提升机即施加紧急制动,防止事故的扩大。但这些接点、触头和开关安装地
I. Overview Mine hoisting equipment occupies an important position in mine production. To this end, coal mine safety regulations on the hoist protection and blocking put forward strict requirements. Currently used in large mine hoist, the electronic control system are provided in the safety protection circuit, according to different protection links, in its safety protection circuit in series with a lot of latching safety protection contacts. Once the upgrade system is not working properly, a certain contact, contact or limit switch of the safety protection circuit will make the protection circuit lose power instantly. The elevator will impose emergency braking to prevent the accident from expanding. But these contacts, contacts and switches installed