简介

　　电接点压力表适用于测量对铜合金无腐蚀、无爆炸危险、非结晶的各种液体、气体等介质的压力。仪表经与相应的电气器件配套使用，可达到对被测压力系统实现预先设定的最大或最小压力值的双位自动控制和发信(报警)的目的。

　　仪表具有测量控制功能，可任意设定上、下控制压力值，动作稳定可靠，在石油、化工、电站、冶金等工业企业及机电设备上广泛配套使用。

　　本公司生产的电接点系列包括括磁助电接点、耐震电接点、不锈钢电接点、隔膜电接点、氨用电接点等，可全面满足使用条件的要求。

　　Brief Introduction:

　　Electrical contact pressure meter is applicable to measure pressures of various such mediums as non- crystallized liquids or gases without danger of explosion that has no corrosive action on copper alloy. This instrument, if used with corresponding electrical devices in supporting set, may achieve the purposes of two-digital automatic control and message sending (alerting), which show pre-set max. or min. pressures of the tested pressure system.

　　This instrument has measuring and controlling function, which enables arbitrary setting of upper and/or lower values of pressure control. With its reliable action, it is widely used supporting device in electromechanical equipments in such industries as petroleum, chemical industry, power station, and metallurgy.

　　Electrolysis point series produced by this company include: magnet-booster electric contact, shock resistance electric contact, stainless steel electric contact, diaphragm electric diaphragm, electric contact for ammonia, etc., fully satisfying requirements of applied conditions.

　　构成示意图

　　主要技术参数•精确度：1.6级，2.5级•触电功率：YXC磁助式为1A、10VA，YX 直接作用式为0.7A、30VA •最高工作电压：AC380V、DC220V •控制方式：上、下限、双上限、双下限等控制形势。•使用环境：-40℃～70℃，相对湿度不大于85%Principal technical parameters•Precision : 1.5, 2.5 grades •Electric shock power: 1A, 10VA, YX for YXC magnet assisting type 0.7A, and 30VA for direct action type •Highest working voltage: AC380V •Control style: upper or lower limit, double upper limit, double lower limit, or other control forms •Environmental condition in use: -40～70℃, relative humidity less than 85%

　　结构原理

　　仪表由测量系统、指示装置、电接点装置、外壳、调节装置及接线盒等组成。

　　当被测压力作用于弹簧管时，其末端产生相应的弹性变形——位移，经传动机构放大后，由指示装置在度盘上指示出来。同时指针带动电接点装置的活动触点与设定指针上的触头(上限或下限)相接触的瞬时，致使控制系统接通或断开电路，以达到自动控制和发信报警的目的。

　　在电接点装置上装有可调节的永久磁钢，可以增加接点吸力，加快接触动作，从而使触点接触可靠，消除电弧，能有效地避免仪表由于工作环境振动或介质压力脉动造成触点的频繁关断。所以该仪表具有动作可靠、使用寿命长、触点开关功率较大等优点。

　　Configuration principle

　　This instrument consists of measuring system, indicating device, magnet-assisted electric contact device, outer housing, adjusting device, and junction box, etc.

　　When the pressure acts on the spring pipe, corresponding elastic deformation or displacement occurs at the pipe end accordingly, which is amplified through running gear and displayed in indicating devices dial as the pressure being tested. Meanwhile, indicating needle makes the armature contact of the electric contact device and the contactor (superior limit or lower limit) fixed on needle contact together instantaneously, which causes the controlling system switches on or off, for the purpose of automatic control and alert by sending message.

　　A piece of permanent magnetic steel is fixed on the electric contact signaling needle of the electric contact device, so as to reinforce the magnetism of the contactor and speed up the contact action. This may ensure reliable contact of the contactors, to eliminate electric arc, and to avoid such frequent switch-on/off of the contactors caused by the working environment, vibration, or medium pressure pulse of the instrument. This instrument has a lot of advantages, including reliable action, long-term life span of usage, greater power of contact switch, and so on.