进给阀

Focused on many problems existing in pressure control system of drilling pipe friction welding,such as high failure rate and poor amenability,the basic principles of friction welding and electro-hydraulic proportional technique were briefly described.

针对焊接钻杆连续驱动摩擦焊机采用开关阀组成压力控制系统存在故障几率高、可控性差等问题，将电液比例控制技术应用在摩擦焊压力控制中，实现了摩擦焊轴向压力闭环控制、滑台进给速度的开环控制；可对摩擦焊机主轴速度、轴向压力、轴向缩短量、主电机电流、油温等进行实时检测。

An automatic feeding mechanism of circular plate type is added to a normal table-type rivet bucker .

在通用台式旋铆机上增加齿盘式自动进给机构，由电气控制箱通过电磁阀控制3个气缸的协调动作，实现了半自动化生产，生产效率提高5倍以上，同时改善了铆接品质。

To fill the system, open the shutoff valve upstream of the regulator.

如果要给系统进水，请打开调节阀上游的关断阀。

Waste draining pipe, offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.

9.7.4水冷壁下联箱、省煤器进只联箱、过热器联箱、再热器联箱、蒸汽管和给水管的最低点等可能有沉淀物或积水处，应装设排污阀、放水阀或疏水阀。

Waste draining pipe,offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.

9.7.4水冷壁下联箱、省煤器进只联箱、过热器联箱、再热器联箱、蒸汽管和给水管的最低点等可能有沉淀物或积水处，应装设排污阀、放水阀或常州导热油锅炉阀。

A second stepper motor control FMI valveless pump, for regulating the injection of feed speed and frequency of injection material.

第二个步进电机控制FMI无阀泵，用于调节进给速度和频率注射注射材料。

The introductive robot arm of this text can output two lines pulses by the PLC, driving the horizontal stalk, and the perpendicular stalk to drive the electrical engineering actuator respectively, to control the robot arm precision of the horizontal stalk and perpendicular stalk at the fixed position, tiny move switch input the position signal to the PLC.The direct current motor drags along to begin the claw and bedrocks to revolve, the position signal from revolve the code dish and near to the switch feedback to host of PLC;The electromagnetism valve control the machine hand open and close, thus carry out the function of the machine hand precision work.

本文介绍的机械手是由PLC输出两路脉冲，分别驱动横轴、竖轴步进电机驱动器，控制机械手横轴和竖轴的精确定位，微动开关将位置信号传给PLC主机；直流电机拖动手爪和底盘旋转，位置信号由旋转码盘和接近开关反馈给PLC主机；电磁阀控制气开阀的开关来控制机械手手爪的张合，从而实现机械手精确运动的功能。

Original design of vacuum furnaces for the three furnace feed valve sleeve, due to feed containing residue, impurities, often control valve block, and the temperatures are high, easily condensed to give instruments to bring a lot of work to maintain, in June 1998 will be 3-way feed to the rotary valve for FISHER, due to rotary valve has a strong distribution capacity to overcome these problems, operating normally.

原设计减压炉3炉进料为套筒阀，由于进料含有渣油、杂质，经常将控制阀堵住，且温度高、易凝结，给仪表维护带来大量的工作，1998年6月将3路进料该为FISHER旋转阀，由于旋转阀具有较强的流通能力，克服上述问题，运行正常。

Suction superheat control system consists of electronic expansion valves, pressure sensors, temperature sensors, controller, working hours, the pressure evaporator outlet pressure sensor P1, temperature sensors compressor suction superheat will be passed to controller, controller After signal processing, followed by the output commands acting on the main electronic expansion valve stepper motor to open the valve to the desired location.

吸气过热度控制系统由电子膨胀阀、压力传感器、温度传感器、控制器组成，工作时，压力传感器将蒸发器出口压力P1、温度传感器将压缩机吸气过热度传给控制器，控制器将信号处理后，随后输出指令作用于电子膨胀主阀的步进电机，将阀开到需要的位置。

With the trip valve to achieve fast-forward and work into the conversion, using two two-pass solenoid valve for a two-speed conversion between work into, in order to ensure the dimensional accuracy of the feed, with only the block to limit stays.

用行程阀实现快进与工进的转换，用二位二通电磁换阀进行两个工进速度之间的转换，为了保证进给的尺寸精度，用止挡块停留来限位。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。