【正文】 e. For many years, domestic brand low price petition cause product quality and after sale service quality can make user to be satisfied each other, and performance and quality to the apparatus of user in the coal, electricity, petrochemical industry, port,etc. are expected very much, they would rather often spend several times even price in the domestic products of more than ten times choosing the foreign imported brand products. On the whole, person who bring conveyer protector products have function single, performance lag behind, structure plicated, appearance coarse, dependability shorting such as being poor at home. The advanced product market is basically dismembered by foreign countries brand, there is not a brand with stronger petitiveness and influence yet at home. In addition, it is a very different important reason of bringing type conveyer protector product quality at home too to lack the sector standard. In fact, the bringing type conveyer protector market demand of the products is very enormous, the domestic producer only changes the idea, take charge of quality severely, fully utilize the latest technology, developing the new products constantly according to market 9 demand, can certainly reseize the advanced market that the foreign brand is being captured.。 Install and draw the line type switch in the conveyer belt low。總而言之，帶式輸送機保護裝置的 發(fā)展必須要、也必然會與檢測技術(shù)、通信技術(shù)以及自動化控制技術(shù)的發(fā)展緊密結(jié)合。 目前已經(jīng)出現(xiàn)的帶式輸送機保護系統(tǒng)主要側(cè)重于集中通信和信號采集功能，各個現(xiàn)場劉寶興：大傾角膠帶輸送機控制系統(tǒng)設計 4 保護裝置的智能化開發(fā)和應用比較少，有部分廠家采用單片機技術(shù)開發(fā)了智能式拉伸開關、智能式跑偏開關等 . 第二，發(fā)展一體化、小型化帶式輸送機保護裝置。 總體來說，國內(nèi)帶式輸送機保護裝置產(chǎn)品存在功能單一、性能落后、結(jié)構(gòu)復雜、外形粗糙、可靠性差等缺點。料流開關有時還用來觸發(fā)降塵除塵設備如水噴淋裝置和除塵器等聯(lián)鎖工作。打滑是一種較為嚴重的故障現(xiàn)象，原因可能是超載、輸送帶受卡阻、斷帶、滾筒卡死、驅(qū)動電機轉(zhuǎn)速異常等等，如不及時停機可能引起設備嚴重損壞、火災以及人身傷害等嚴重事故 。拉繩開關動作后的復位方式分為自動復位和手動復位兩種。 帶式輸送機的運行狀況直接關系到生產(chǎn)過程中設備和人員的安全。 1 應用現(xiàn)狀及存 在的問題 拉繩開關 拉繩開關是用于帶式輸送機緊急停機的一種現(xiàn)場操作保護裝置。 跑偏開關 跑偏開關是用于檢測帶式輸送機運行過程中輸送帶跑偏程度并進行報警的一種保護裝置，有時也用于在輸送帶嚴重跑偏時自動觸發(fā)緊急停機。部分打滑開關裝置還能夠?qū)崟r提供輸送帶線速度或滾筒轉(zhuǎn)速的信號顯示和輸出。帶式輸送機系統(tǒng)中兩條輸送機之間通常是通過管狀落料斗連通，運行中當落料斗出口因各種原因受堵時物料會很快堵滿整個落料斗乃至大量溢出。 事實上，帶式輸送機保護裝置產(chǎn)品的市場需求十分巨大，國內(nèi)廠家只要改變觀念，狠抓質(zhì)量，充分利用最新技術(shù)，根據(jù)市場需求不斷開發(fā)出新的產(chǎn)品，必定可以搶回國外品牌占領的高端市場。 針對實際應用中接觸式測量方式存在的缺點，可以盡量采用非接觸式測量技術(shù)手段，以減少對現(xiàn)場工藝流程的影響，并可以大大延長保護裝置的使用壽命、減輕檢修維護的負擔，如非接觸型的感應式跑偏開關和感應式料流開關等。 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 m