Description of use
The instrument adopts a double bellows structure, that is, two bellows are respectively installed at symmetrical positions on both sides of the "work" type bracket. The upper and lower ends of the "work" type frame are respectively a movable end and a fixed end, and the middle is connected by a spring piece; the two bellows are connected with the low pressure joint on the case, and the gear transmission structure is directly installed at the fixed end of the bracket. And connected to the movable end of the bracket through the tie rod; the dial is directly fixed on the gear transmission mechanism.
When different pressures are applied (generally the high pressure end is higher than the low pressure end), the forces acting on the movable brackets of the two bellows are not equal, so that the respectively generated displacements, and the gear transmission mechanism is driven and amplified, and the pointer is deflected and indicated. The differential pressure value.
