【正文】 開關一般為無源機械式雙向拉繩開關，主要有旋轉式凸輪結構和移動式凸輪結構兩種。緊急情況下，可以在帶式輸送機沿線任意位置拉動拉繩，觸發(fā)開關動作實現緊急停機。 料流開關 料流開關是檢測輸送帶上是否有物料的保護裝置，有的產品可區(qū)分不同流量大小，在流量超大時還可以提供超載報警。 帶式輸送機綜合保護自動化系統(tǒng)與帶式輸送機控制系統(tǒng)互相連接通訊，參與到整個帶式輸送機控制系統(tǒng)的邏輯控制過程中，可充分發(fā)揮保護裝置的作用。 Divide according to internal operation principle, there are magism hindering types, magic electricitying type, photosensitive type,etc.. Skid switch device can offer, transport signal with linear velocity or rotational speed of cylinder reveal and export in real time also partly. and split open and close It is to measure a longitudinal a kind of protector that tore and called the police of conveyer belt to tear and split open and shut in, can be used in touching off emergency shutdown automatically when the conveyer belt is torn. Majority tear, take place, in conveyer belt tail clan hopper export, scratch, blow, wear conveyer belt even because the heavy hard things in the supplies are blocked and fallen in the hopper exit, it is with support and asking the reason out of shape of the roller to cause that some emergence that tear is often sent. Divide according to different detection means and operation principle, have, install on transport with below photoelectricity type and conductive rubber type tear, split open, imprison。 5 附錄 B Application and development of the conveyer protector Foreword The bringing type conveyer is that a kind of supplies employed in the industrial enterprise extensively transport the apparatus, mainly made up of conveyer belt and driving the electrical machinery and supporting the apparatus, control and protector,etc.. Usually one grade of antithetical couplets make up an intact conveyer system alternately each other by several strip type conveyers, realize the transport at a long distance of the supplies. The operation conditions directness of the bringing type conveyer concerns the security for producing apparatus and personnel in the course. How make conveyer protector of bringing etc. highefficiently and reliably and steadily in produce operate, functioning, having important realistic meaninging very fully. The target that this text discusses is mainly a pull switch, run, lean towards switch, skid switch, tear, split open, imprison, material flow switch, stop up material switch first protector of conveyer of bringing etc.. Current application situations and existing problem. Pull switch used for person who bring conveyer first kind of emergency shutdown operate protectors live. The pull switch employed extensively at present is generally a passive machinery type twoway pull switch, mainly have rotating type two kinds cam structure and portable cam structure. Movement journey loud, the sensitivity is high and difficult to be seized rotate, because of cam pull switch pendulum rod of structure of rotating etc., so adopted more at present. Pull switch fixed to install on conveyer both sides support of bringing etc. according to certain interval (about 40m), tie and draw the rope each other. Under the emergency, can arbitrary seat pulls and plays the rope in conveyer of bringing etc., tou