A pressure gauge consists of several main components: a connector, a Bourdon tube, and a movement. Welding techniques for pressure gauges include lead-zinc welding, silver welding, argon arc welding, and other special welding methods. The Bourdon tube of the instrument is designed for 100,000 cycles under normal operation. Its working principle involves the Bourdon tube deforming, which in turn causes the movement (the sector teeth and the central gear) to move the pointer, displaying the pressure of the measured medium on the dial scale.
I. Three common problems encountered during the use of pressure gauges:
1. Additionally, the sector gears of the instrument will show wear after working for a period of time.
2. The instrument pointer is pushed below the stop position due to the instantaneous increase in pulse from the measured medium.
3. The instrument pointer will not be at zero after the pipeline or equipment is depressurized.
II. Three methods to solve common pressure gauge problems:
1. The fan-shaped teeth of the deflector are widened to improve the contact surface and resistance to wear, thereby extending the service life.
2. The movement of the instrument is the heart of the pressure gauge. More than 80% of instrument failures are due to damage to the movement, rendering the instrument unusable. By adding a limit pin to the existing movement, the problem of the instrument skipping gears was solved.
3. Adding an isolation plate can resolve the issue of the instrument not returning.
