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附图是一种简单可靠的压差信号发生装置,其结构和原理简介如下。附图中,发讯装置分为三部分。上部为干簧管放置室,中部为液压动作室,下部以显示盘室。三室隔绝。在存在压差Δp的情况下,设p_1为高压,p_2为低压。由于p_1>p_2,p_1推动活塞5向左运动,从而压缩调节弹簧7。当弹簧被压缩的反作用力与作用在活塞上的推力大小相等时,活塞5稳定于某个位置,若p_1或p_2发生变化,也即压差△p发生变化时,活塞将继续运动直至处于下一个暂稳状态。若将干簧管1(图中为三只)根据预选不同压差档的要求成阶梯放置并经调整,则在不同的Δp的作用
Figure is a simple and reliable differential pressure signal generating device, the structure and principle are as follows. In the drawing, the sending device is divided into three parts. Upper reed pipe to place the room, the middle of the hydraulic chamber, the lower to show the disk chamber. Three rooms isolated. In the presence of pressure differential Δp, let p_1 be the high pressure and p_2 the low pressure. As p_1> p_2, p_1 pushes the piston 5 to the left to compress the adjustment spring 7. When the reaction force of the compression spring is equal to the thrust force acting on the piston, the piston 5 is stable at a certain position. If p_1 or p_2 is changed, that is, when the pressure difference Δp is changed, the piston will continue to move until it is under A temporary steady state. If the reed pipe 1 (three in the figure) according to the requirements of different pre-selected file into a ladder placed and adjusted, then the role of different Δp