In a hurry, the Spring Festival of the Year of the Rabbit is approaching, and the annual Spring Festival has begun. This spring festival is the first spring festival after the epidemic prevention and control entered a new stage. During this period, hundreds of millions of passengers will embark on their homecoming journey with the help of air, railway, highway and other means of transportation. According to the data from the Ministry of Transport, the total passenger flow of the Spring Festival transport this year is estimated to be about 2.095 billion person-times, nearly double that of the same period last year. There are thousands of roads, and safety is the first. No matter what way you choose to travel, peace is always the common aspiration of all people. During the Spring Festival Games, a variety of high-tech technologies have been applied to security links, such as millimeter wave, face recognition, etc. They not only ensure the safety of passengers, but also greatly improve people's travel experience and guard the way home for hundreds of millions of people. All kinds of explosion-proof devices: use special structures to skillfully defuse the danger. In the corners of the airport, railway station, subway station and other transportation stations, you will usually see a round dark ball. This "fat guy" is the "magic weapon" of the station to deal with emergencies - explosion-proof ball. Explosion-proof ball is usually the most recognizable explosion-proof device for passengers, and it generally adopts spherical and closed structure. When disposing of explosives, first deliver the explosives to the sphere through the mechanical arm and the blasting rod, and then close the sphere. When the explosive explodes in the spherical tank, the tank body made of high-strength structural steel can seal the detonation products in the ball, so that it does not cause greater harm. Bian Xiaobing, the director and senior engineer of the explosion-proof equipment department of Beijing Institute of Technology Aier Safety Technology Co., Ltd., told the Science and Technology Daily that the explosion-proof capacity of the explosion-proof ball is generally 2 to 3 kg of TNT (trinitrotoluene) equivalent. Its own weight is usually more than 1 ton, so it usually needs to be used with a trailer. Explosion-proof device similar to explosion-proof ball also has explosion-proof tank. Its barrel-shaped shape is unattractive and much more "low-key". Unlike the explosion-proof ball, the explosion-proof tank is usually a non-closed structure with an open top. When the explosive explodes in it, the bottom and wall of the tank body composed of high-strength metal structure will lead the shock wave upward, so that the explosive energy will escape from the top, and protect the safety of surrounding personnel. The explosion-proof capacity of the explosion-proof tank is generally 0.5 to 2 kg TNT equivalent, and its own weight is more than 300 kg, which usually requires trailer cooperation. In addition to large-equivalent and large-weight explosion-proof devices, Bian Xiaobing said that a major development direction of explosion-proof devices today is structural lightweight. For example, the explosion-proof blanket, which has been widely used at present, is usually made of multi-layer composite materials and is composed of internal and external fences and blankets. It can effectively intercept the explosive fragments and guide the explosive energy to escape to the top. Its explosion-proof equivalent is about one grenade, and its own weight is usually within 30 kilograms, which is easy to move. In addition, Bian Xiaobing said that the latest lightweight explosion-proof products include flexible explosion-proof tanks, rigid and flexible composite explosion-proof tanks, which can be used in combination with a variety of different explosion elimination scenarios. For example, the flexible explosion-proof tank contains porous energy absorbing foam and explosion-proof and flame retardant liquid, and it adopts high-performance fiber structure design. In case of explosion, the impact can be realized through the porous energy absorbing foam and explosion-proof flame-retardant liquid inside
Edit：Ying Ying Responsible editor：Zhou Shu
Source：digitalpaper.stdaily.com
Special statement: if the pictures and texts reproduced or quoted on this site infringe your legitimate rights and interests, please contact this site, and this site will correct and delete them in time. For copyright issues and website cooperation, please contact through outlook new era email：lwxsd@liaowanghn.com
Sci-Tech
Recommended Reading Change it 
Home
