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There is no damage to firefighters caused by the impact acceleration of fire helmets

Author:admin   Release time:2020-11-09 14:24:58   Visits:295times

In the fire scene, the head and neck injury may be caused by falling objects or firefighters falling from a height. If there is no fire helmet, the injuries may mainly include 1. Scalp injury, causing bleeding or disfigurement; 2. Head injury, causing linear, rectangular depression or comminuted fracture; 3. Cervical spine injury, causing cervical spine fracture, fracture, spinal cord injury, etc.; 4, brain damage, usually brain rupture, contusion or shock. Among them, concussion brain injury, also known as concussion, is difficult to protect. Without a fire helmet, the main cause of concussion is the speed difference between brain tissue and human body, that is, impact acceleration. According to the external causes of concussion and the internal structure of human brain, domestic and foreign scientific research institutions have carried out a large number of research experiments, and obtained the tolerance curve of acceleration value and duration of acceleration when human head is impacted, that is, the tolerance curve of human head. According to the curve, combined with the actual situation, I have seen that ga44-2004 Fire Helmet standard specifies the performance index and test method of fire helmet impact acceleration protection.

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