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summary
The differential pressure gauge (hereinafter referred to as the instrument) is applicable to measuring the differential pressure, flow and other parameters of various liquid (gas) media in the process flow of chemical, chemical brazing, metallurgy, power, nuclear power and other industrial departments. The instrument structure is made of stainless steel. The measuring system (double bellows quick connection parts) and pressure guiding system (including joints, conduits, etc.) adopt special structures with reasonable design, advanced technology, small volume, light weight, good stability, long service life, novel appearance and strong adaptability. The connection forms of instrument connector include parallel type and inclined type, which can adapt to the supporting installation of different customers.
working principle
The structure of the stainless steel differential pressure gauge is a double corrugated pipe structure, that is, two corrugated pipes are respectively installed on the symmetrical positions on both sides of the "I" shaped support. The upper and lower ends of the I-shaped bracket are respectively the movable end and the fixed end, and the middle is connected by a spring plate; The two bellows are connected with the low pressure connector on the case, and the gear transmission structure is directly installed on the fixed end of the bracket. And is connected with the movable end of the bracket through a pull rod; The dial is directly fixed on the gear transmission mechanism. When the upper and lower ends receive different pressures (generally, the high pressure end is higher than the low pressure end), the forces acting on the movable support by the two bellows are not equal, so that the displacement is generated separately, and the gear transmission mechanism is driven and amplified. The differential pressure value indicated after the pointer is deflected.
product mix
The differential pressure gauge is composed of fine adjustment part, leveling observation part, reflector part and housing part
1. Leveling observation part - a water gauge head is installed in the observation cylinder to observe the change of the liquid level in the observation cylinder after the pressure is applied by the dynamic pressure pipe.
2. Shell part - the long screw is supported by the shell and cross arm, and the shell is equipped with leveling bubble and adjusting screw to adjust the verticality of the screw and dynamic pressure pipe of the micro manometer.
3. The reflector part is fixed on the mirror shell by a reflector. The reflector surface reflects the contact between the water level head in the observation cylinder and the liquid level, so that the level head tip is connected with the shadow tip of its reflection, indicating the "base point" of the micro manometer reading adjustment
4. Fine adjustment part - a fine adjustment disc engraved with 200 equal parts is fixed on the long screw rod. The long screw rod moves, and the water box moves up or down. An indicator block is installed on the static pressure connector of the water box. The indicator block moves between the indicator plate and the letter plate to indicate the displacement height of the water box.
Working principle and structure of stainless steel differential pressure gauge