【 Weak current College 】 meter surface glass breakage and improvement of

Water meter is flow measurement area and most expensive, most widely used surface, the variety specification is the most complete range of meter. In General, drainage process control has a pivotal position. Its products are from the original full mechanical structure forms development until now from "mechanical meter" composed of a full, feature a variety of water metering instrumentation product families. Among the many water meter product Assembly and testing, you'll find out some unqualified products, such as water surface glass broken, in water meter installation and use is often a customer reaction water gauge glass damage to the ruptured in some water pressure and temperature high and large areas are also frequent water meter rupture. Water gauge glass surface rupture if not found is not only a waste of water resources, serious, may make the glass fragments fly shot out near. sting This article is the first study on the water meter surface glass breakage, further analysis improvement measures. To increase the rate of water meters, decrease the number of security implications.

1. water meter surface causes of broken glass

1.1 meter key components exist quality defects

When the meter steel and rubber ring contact that a torus surface if not flat like a depression, when mid-air tighten, you may have against depression glass to glass breaking local pressure. If tempered glass quality also affects the glass breaks, from some water gauge glass fragments can be seen in the shape, size, quality of tempered glass, which breaking of glass quality most often is not good.

The widget for meter 1.2 Assembly forms the existence of hidden dangers caused rupture

When steel water meter, if with a plastic cover, in tight, tebi relatively rigid plastic large deformation, mid-air effects because their plastic, the pressure on water gauge glass produce but do not make the glass breaks, over time, the plastic cover child stress release itself to continue to put pressure on the glass, may make the glass breaks, or pressure in the pressure-time cover child further deformation, rupture of the glass.

Changes of temperature difference weather 1.3

In the inland areas in China, and temperature. At temperature from 0 ° c to 4 ° c, the density of water is gradually increased by 4 ° c; the temperature continues to rise in-process, gradually reduce the density of water; water at 4 ° c maximum density. Water at 0 ° c to 14 ° c, showing a "cold expansion heat shrinkable" phenomenon. So when the temperature dropped to below 14 ° c, with the temperature decreases, the volume of water, the water becomes increasing pressure in the pipeline, and the water gauge glass is the most fragile part of frequent rupture phenomenon.

1.4 pipeline pressure suddenly change

Pipeline system valve closed and opened a sharp, sudden shut down of pump, liquid velocity changes occur suddenly, and due to the inertia of the liquid, causing a rapid rise and lower pressure of alternate variant, the resulting water hammer, step-up and step-down inter-twined, for pipe wall and valve acts like a hammer, rupture of the glass.

1.5 improper installation of the

When installing the meter, if not careful can make a direct role in forcing water gauge glass surface, or construction bricks hit bottom damage to the water gauge glass.

2. improvement measures

2.1 will install in the House of water meters

The water meter installed inside the House, you can avoid the invasion of the weather, rain and unidentified falling objects crushed water gauge glass.

2.2 retro warmth installation of water meters

Water meter Assembly General in environment, when winter conditions in the North, is bound to the pipeline in the Shui "cold expansion heat shrinkable", if the measures taken to keep warm, will be able to reduce the difference in temperature caused by the rupture of a meter.br>
Improve part quality 2.3

You can increase the water meter steel and rubber ring contact of the torus flatness to cover child, thread down thrust generated an average of distribution in the glass surface, or you can choose more pressure and high temperature difference of tempered glass.

2.4 full plastic shell

Plastic shrinkage of relative shell steel is relatively large. Adapt temperature range, when the temperature difference when the contraction caused by glass, can also cause the plastic shell of the enamel, but plastic shell expand the amount of space you have telescopic, steel base, can effectively avoid iron shell when glass micro deformation and deformation-induced steel basic not shatter.

Similarly, when the water pipes in the water due to temperature and volume larger pipeline pressure increases, the plastic case of plastic can reduce water pressure in the pipeline.

2.5 installation Note

Water meter installation to ensure that the water meter into the head and the head position, cannot be forced to use a meter to ensure fles and outlet pipe of the position. So water meter deformation, rupture caused by water gauge glass.

3. conclusions

Water gauge glass surface rupture is composed of multiple causes, from the water meter structure and environment to analyze why. But to solve the water gauge glass rupture phenomenon, also require manufacturers to continuously improve related parts materials for pressure-resistant, resistant to temperature changes, etc. Ensure that customers use in different quality requirements in your environment.