Solenoid valve closing response time≤5s. 9. Methods to prevent gas leakage. Gas leakage includes two aspects, one refers to gas leaking to the environment through the pipeline, and the other refers to gas leaking into the furnace through the solenoid valve core end. Environmental leakage may cause personnel poisoning and explosions at the work site, and it is necessary to attach great importance to it.
First, ensure that the pipeline is sealed, and regularly check the pipeline for leaks. If the pipeline leaks, it must be cleaned before it can be used. Second, to prevent the formation of poisoning and explosive gas concentrations, the work site is required to be well ventilated: equipped with continuous ventilation holes and forced ventilation Equipment; In addition, fireworks and explosion-proof electrical parts are required to be prohibited at the work site. A leak in the furnace may cause an explosion in the furnace.
The burner is a thermal energy device that feeds fuel and air into the furnace according to the required concentration, speed, turbulence and mixing method, and enables the fuel to stably ignite and burn in the furnace. The fuel is mainly oil and gas. Generally used in small and medium-sized oil or gas boilers.
In the broad concept of burners, household water heaters, gas stoves, and even lighters can be considered as a kind of burner. According to its working principle, a burner can be defined as a device that converts substances into heat through the chemical reaction method of combustion-mixing air and fuel in an appropriate ratio through a pre-mixing device to make it fully burnt. Therefore, in order to improve the quality of the fan, the gas control must be interlocked with the air pressure. When the air pressure is insufficient, the gas supply should be blocked immediately. Generally, a gas pressure switch is used to sense the air pressure signal and output a switch quantity signal to control the corresponding work of the gas solenoid valve.
Power failure protection The burner suddenly loses power during the working process. It is necessary to immediately block the gas supply to protect the safety of the equipment. The gas-operated solenoid valve must be normally closed. Once the power is cut off, it will actively shut down and block the gas supply.
There are three ways to deal with leakage in the furnace:
One is to strengthen the pre-blowing time and the amount of blowing to blow off or dilute the gas in the furnace;
The second is that the gas pipeline uses two solenoid valves in series to improve the safety of the system;
The third is to use pipeline leakage detection equipment to detect the gas pipeline before ignition. If the gas leakage reaches a certain amount, the burner will be locked.
