【正文】 統(tǒng)的邏輯控制過程中，可充分發(fā)揮保護裝置的作用。多年來，國產(chǎn)品牌相互之間低價競爭導致了產(chǎn)品質量和售后服務質量都不能令用戶滿意，而煤炭、電力、石化、港口等行業(yè)的用戶對設備的性能和質量要求很高，他們常常寧可花幾倍甚至十幾倍于國內產(chǎn)品的價格選擇國外進口品牌產(chǎn)品。 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(chǎn)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。 打滑開關 打滑開關是用來檢測輸送帶與傳動滾筒之間的滑動并進行報警的一種保護裝置，可用于在輸送帶發(fā)生打滑時自動觸發(fā)緊急停機。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(xiàn)緊急停機。通常由若干條帶式輸送機互相級聯(lián)交叉組成一套完整的輸送系統(tǒng)，實現(xiàn) 物料的長距離輸送。目前廣泛應用的拉繩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。目前廣泛應用的跑偏開關一般為無源機械式兩級跑偏開關。 撕裂開關 撕裂開關是檢測輸送帶縱向撕裂并報警的一種保護裝置，可用于在輸送帶發(fā)生撕裂時自動觸發(fā)緊急停機。在落料斗的中上部位置安裝堵料開關可以在堵料事故發(fā)生的初期報警并可自動觸發(fā)緊急停機，從而避免大量堵料造成的輸送帶打滑、驅動電機過載等嚴重后果。 3 改進及發(fā)展方向 結合近年來出現(xiàn)的一些新技術和新產(chǎn)品的應用情況看，帶式輸送機保護裝置有以下發(fā)展趨向。 針對一般打滑開關不能全過程檢測輸送帶打滑的不足，可以采用同時檢測帶式輸送機的主動輪滾筒、從動輪滾筒以及輸送帶的運行速度 是否一致的方式，檢測輸送機從啟動到運行、到停止的全部過程中輸送帶的不同位置是否發(fā)生打滑。 As to long conveyer of bringing etc. very, adopt, divide into groups the way to insert by stage along the line pull switch sometimes. Run and lean towards the switch Run, lean towards switch used for, measure conveyer operation course of bringing etc. conveyer belt run intensity of leaning towards and go on a kind of protector that call the police, used in touching off emergency shutdown automatically when the conveyer belt simply runs seriously too sometimes. What employ extensively runs and leans towards the switch and generally runs and leans towards the switch for passive machinery type two grades at present. Run and lean towards the switch to install fixedly on the bringing type conveyer both sides support according to certain interval (about 50m), run gyro wheel part to lean towards switch deviate from border of conveyer belt that centre turn round produce the deflection pinch, touch off the joint movements of the switch when it is transferred to certain angle that the gyro wheel leans towards. Usually one strip to run, lean towards switch close joint insert person who bring divideshut brake of conveyer control return circuit or call the police, point out device connect in series, often all conveyer。 Employ munication and address code technology, concentrate on to install whole of person who bring in scene conveyer protectors of systems monitor and control, realize the function of restoring to the throne in the status display of distant place and distant place etc.. Second, development integrates, the miniaturization bringing type conveyer protector. Structural pactness, installing simply and conveniently, performance is reliable, nonmaintaining is that various states of future measure the inevitable direction of development of device. Third, employ new detection technique and detection means, until person who bring conveyer protector use shorting and deficiency of course at present, developing can reflect operation state of the conveyer, protector with more reliable and more steady performance effectively 4 conclusions Until to intensive, among technologyintensive mode course that change from extensive style of our country industrial enterprise at present, how in a situation that reducing, personnel put into, can guarantee the production safety, increase efficiency and benefit, raise one39。 Kinds of the switch are many to