This utility model relates to the field of cable testing technology, specifically a
fire resistance testing device for fire-resistant cables. It includes a
test platform with several lifting components fixedly mounted on it for adjusting the
flame spray height. Each lifting component has a rotatable
flame spray component mounted on it. A spring is installed between adjacent
flame spray components. A
gas supply pipe is connected to the rear end of each flame spray component. A fixing component is provided at the top of each lifting component. By setting up the lifting components, flame spray components, and fixing components, the lifting components drive the flame spray components and fixing components to move up and down synchronously, ensuring that each
nozzle corresponds to a bent cable, guaranteeing uniform heating throughout the cable. This allows the test results to better reflect the cable's true
fire resistance performance. Furthermore, when the cable shape needs to be changed, the cable shape can be altered by adjusting the height of each fixing component, eliminating the need to contact the cable or wait for it to cool down, thus improving testing safety and speed.