Working principle of gas alarm

Introduction to the working principle and concept of gas alarm, gas alarm is a gas leak detection alarm device. When the gas leaks in the industrial environment and the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poison alarm, the gas alarm will issue an alarm signal to remind the staff to take safety measures. The gas alarm is equivalent to automatic Fire extinguishers, etc., can be installed to drive exhaust, cut off, and sprinkler systems to prevent explosions, fires and poisoning accidents, thereby ensuring safe production. The gas alarm can measure various gas concentrations. Often used in chemical plants, oil, gas stations, steel plants, etc.
Working principle of gas alarm
The gas alarm for households is generally installed in the kitchen. When the gas sensor encounters gas, the core gas sensor of the gas alarm is commonly known as "electronic nose". The sensor resistance changes with the gas concentration, and an electrical signal is generated. Gas alarm after-stage processing. After processing by the electronic circuit, it becomes a voltage signal with a proportional change in concentration, which is compensated by a linear circuit to linearize the signal. After microcomputer processing and logical analysis, various control signals are output. The alarm emits sound and light alarm signals and can display the gas concentration or activate external intermodal equipment (such as exhaust fans, solenoid valves). The detector's ability to sense gas leaks at the installation site is usually alarm concentration below 25% of the lower explosion limit of various gases, natural gas is 0.1% -1.0%, artificial gas is 0.1% -0.5%, and liquefied petroleum gas is 0.1. % -0.5%.

Plastic Parts

Water-assisted injection molding: Water-assisted injection molding technology is an advanced injection molding process in which part of the melt is injected into the mold cavity and high-pressure water is injected into the melt through the equipment to finally shape the workpiece.

Due to the incompressibility of water, the water front creates a solid interface, squeezing the inner wall of the product into a cavity, and the water front also acts as a rapid cooling. Therefore, the water supplement has many advantages over the gas supplement. Research and application show that the water supplement can produce thinner and more uniform cavity wall, and the inner surface of the flow channel is very smooth. Especially for thick wall workpiece, the cooling time can be greatly reduced compared with gas auxiliary.

Abs 11 JpgHigh gloss injection molding: Highlights the basic process of injection molding is prior to injection molding, through the use of high temperature and high pressure steam will mould surface rapidly warming, the forming die cavity surface temperature of resin plastic glass transition temperature (Tg) above, then the plasticizing good plastic melt into the closed mold cavity, the injection stage, mold temperature by high temperature and high pressure steam remains the same, When the injection is finished, the air supply is stopped, and the water vapor in the pipe is blown clean by air pressure of the air pipe. After that, the cooling water is injected to make the mold temperature drop rapidly until the mold is cooled and the product is removed by opening the mold


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