Shanxi Midas Blog

 Working principle of water meters The working principle of a water meter is mainly to calculate water consumption by measuring the flow rate of water passing through the meter. The working principle of different types of water meters is slightly different. Overall, it is based on the water flow pushing the moving parts inside the water meter, generating signals related to the flow rate, and then converting them into water consumption readings through counters or sensors. For example, in a rotary  water meter , when water flows through the meter, the water's kinetic energy pushes the impeller to rotate, and the impeller's speed is proportional to the speed of the water flow. The impeller drives the counter's gear to rotate through the transmission mechanism, and the counter records the water consumption based on the number of revolutions of the gear. Main parameters of water meters Nominal diameter: Refers to the diameter of the inlet and outlet of a water meter, measured i...

 There is no immutable law requiring manhole covers to be round-why should they be round? Although some sewer covers are square or rectangular, there types are rare and are generally only found in cases where there is a need for heavy equipment to go through them. The answer to why  manhole covers  are round is relatively simple, but you need to understand their use and history.   Where does the name "manhole" come from? What exactly is a manhole cover? As its name implies-there is nothing fun here. Manholes appeared in the mid-19th century as a way to enter the sewer system. In order to adapt to the growth of the sewer system, people began to build manholes underground. Initially, the entrance to the sewer system was only large enough to allow light to come in from the hole to see if the sewage was flowing normally. Ultimately, humans need to be able to enter the sewer system. So, to put it simply, the word "manhole" is short for a human-sized hole.   Why ...