译文：
1、概述 电动或液动插板阀(又称眼镜阀)是炼铁高炉煤气管网的主要切断设备之一。该设备广泛用于冶金行业,是高炉煤气除尘系统以及高炉煤气余压发电(TRT)系统的关键切断设备。 2、工作原理 电动或液动插板阀通常与金属密封蝶阀配套使用。以封闭式液动插板阀为例,阀门的启闭由阀座顶开机构(液压缸)和阀板行走机构(液压电机)两部分组成,阀板分别设置通孔座和盲孔座。阀板通孔座和盲孔座的切换由顶开(松开阀板)→阀板横移→夹紧(阀板密封副实现密封)等几个动作完成,由此实现阀门的启闭。电动插板阀的阀座顶开机构和阀板行走机构均由电动装置驱动。 3、故障分析 阀板横移动作由阀板行走机构的链轮驱动阀板下部的传动销轴来实现。电动插板阀出厂调试时,在阀板动作到位后,调整电动装置的行程限位开关,以保证电动装置停止运转的同时限位装置实现阀板的限位。液动插板阀出厂调试时,在阀板动作到位后,调整阀板到位的行程开关,以保证液压电机停止驱动的同时限位装置实现阀板的限位。但是阀门在使用过程中,时而出现行程开关滞后或失灵的现象。 经过现场分析确认,由于电动装置计数器的误调节和运动部件的惯性碰撞等原因,致使行程开关传递的信号滞后或失灵,导致电动装置或液压电机超载继续运转,损坏阀板行走机构的传动轴或联轴器,造成了高炉煤气及其系统的运行事故。 4、改进措施 销齿条安全装置是利用钝齿轮与传动销轴啮合运行到位后,传动销轴及时脱离钝齿轮,使钝齿轮空转,不带动齿条架行走来实现其安全功能,该安全装置并不妨碍钝齿轮反方向运转。销齿条安全装置通常采用滑槽式和活动销式结构。销齿条安全装置设置在阀板横移动作的两极限位置,通过钝齿轮脱离销齿条的空转确保阀板行走机构各传动部件的安全。滑槽式安全装置构造简单,常用于敞开式插板阀。活动销式安全装置适用于封闭式插板阀,在设计时适当加大活动销销孔直径,并配以活动销辅助回位弹簧,确保阀板横移动作正常。 5、结语 销齿条安全装置的应用解决了行程开关滞后或失灵对阀门传动部件的损坏,保证了高炉煤气工艺系统的正常运行。

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原文：
1, an overview of Electric or hydraulic flapper valve (also called spectacles valve) is a blast furnace gas pipe network, one of the main cutting device. The device is widely used in metallurgical industry, is the blast furnace gas and blast furnace gas dust removal system, TRT (TRT) system, the key cutting equipment. 2, the working principle Flashboard electric or hydraulic valves are usually associated with supporting the use of metal sealing butterfly valve. With a closed hydraulic flapper valve, for example, the valve open and close the top opened by the valve seat body (hydraulic cylinder) and the valve plate travel agencies (hydraulic motor) composed of two parts, the valve seat plate were set hole and blind hole seat . Block valve plate through-hole and blind hole seat switch from the top open (release valve plate) → → valve plate sliding clamp (valve plate Sealing achieve sealing) the completion of several actions, thus achieving the valve open and close . Electric Flashboard valve bodies and valve seat to open the top plate running gear driven by the electrical device. 3, failure analysis Valve plate sliding movement by the valve plate running gear sprocket drive transmission pin the lower valve plate to achieve. Electric Slide valve factory when debugging in the valve plate moves in place, adjust the travel limit switch electrical installations to ensure the electrical device to stop functioning at the same time limit device to achieve valve plate limit. Hydraulic valve factory Flashboard when debugging in the valve plate moves in place, adjust the valve plate in place of the trip switch, to ensure the hydraulic motor to stop driving at the same time limit device to achieve the limit valve plate. But the valve during use, sometimes there travel switch delay or failure phenomenon. After on-site analysis confirmed that, due to counter false electrical device regulation and the inertia of moving parts collisions and other reasons, resulting in travel switch delay or failure to pass the signal, leading to overloading of electrical devices, or hydraulic motors continue to operate, damage to valve plate of the drive shaft or a walking mechanism coupling, resulting in a blast furnace gas and the operation of the system accident. 4, improvement measures Pin rack safety device is the use of blunt and running gear meshing with the drive pin in place, drive pin from the cogwheel in time, so that cogwheel idling, non-driven rack-frame to walk to achieve its security features, the security device does not prevent the blunt running gear in the opposite direction. Pin rack safety devices commonly used Chute and activities of the pin structure. Pin rack safety devices installed in valve plate sliding movement two limit positions, through the cogwheel from the sale rack idling to ensure the valve plate travel agencies are the security of transmission parts. Chute safety device simple in structure, commonly used in open-type flashboard valve. Activities Pin safety device applied to a closed flapper valve, due to increase activity in the design of pin pin hole diameter, and accompanied by supporting sales activities in return spring to ensure the normal valve plate sliding action. 5 Conclusion Pin rack safety devices applicable to resolving the trip switch delay or failure of the transmission components of the valve is damaged, the blast furnace gas process system to ensure the normal operation.