(Winter Olympics asked "Ji") How many secrets are behind the "Olympic Rings" fireworks at the opening ceremony of the Beijing Winter Olympics?
China News Service, Shijiazhuang, February 17 (Zhao Danmei) During the opening ceremony of the Beijing 2022 Winter Olympics, fireworks such as "Li Chun", "Five Rings" and "Snowflakes" bloomed brilliantly over the "Bird's Nest", which was shocking.
So, do you know how these high-altitude special effects fireworks are made?
Are there any secrets behind it?
Li Liangliang, from Hebei Shenggu Fireworks Manufacturing Co., Ltd., is the chief engineer of the R&D, production and discharge activities of high-altitude special effects fireworks for the Beijing Winter Olympics.
According to Li Liangliang, due to the different raw materials of the five colors of the "Olympic Five Rings", the lift-off height and burning time will be different. The weight of each high-altitude special effect illuminator must be accurate to milligrams and the burning time to microseconds to ensure the effect. .
Therefore, it is more difficult than ever to create the "Olympic Rings" fireworks shape.
To this end, they restored the firing environment of the Beijing Winter Olympics 1:1 in Anping County, Hebei Province, where the company is located.
The picture shows the staff checking high-altitude special effects fireworks.
Photo courtesy of Li Liangliang
Li Liangliang said that the production of fireworks in winter is likely to affect the intensity of high-altitude special effects illuminators because of the temperature difference.
"The production of high-altitude special effects luminous bodies requires water and raw materials to be rolled together like a Lantern Festival. The raw materials are easy to freeze during production in winter, and they are easy to crack after being sent to the drying room."
It is reported that if the intensity of the high-altitude special effect luminous body is not enough, it will not be able to reach the expected flying height with a well-adjusted boost.
After numerous experiments, Li Liangliang and his team finally solved the temperature difference problem by adopting the step heating and step cooling methods.
In addition to ensuring the discharge effect, Li Liangliang's team also paid special attention to environmental protection issues, and specially prepared a high-altitude special effect illuminator with low smoke and zero residue, while ordinary fireworks will drop paper scraps, wood chips, etc. after the explosion.
As the Beijing Winter Olympics draw to a close, Li Liangliang and his teammates are also making preparations for the high-altitude special effects fireworks for the closing ceremony of the Beijing Winter Olympics and the opening ceremony of the Beijing Winter Paralympics.
He said with a smile that he would not let everyone down.
(Finish)