防火電纜橋架之所以具備防火性能，關鍵在于使用了特殊的防火材料。橋架主體通常采用的冷軋鋼板或不銹鋼板，這些金屬材質本身具有一定的耐高溫和不燃特性，為防火提供了基礎保障。

　　The key to the fire-resistant performance of fire-resistant cable trays lies in the use of special fire-resistant materials. The main body of the bridge is usually made of high-quality cold-rolled steel plates or stainless steel plates, which have certain high temperature resistance and non flammability characteristics, providing a basic guarantee for fire prevention.

　　在此基礎上，橋架表面會進行特殊的防火涂層處理。常見的防火涂層為膨脹型防火涂料，這種涂料在常溫下與普通涂料無異，具有良好的裝飾性和防腐性。

　　On this basis, the surface of the bridge will be treated with a special fireproof coating. The common fireproof coating is the expansion type fireproof coating, which is no different from ordinary coatings at room temperature and has good decorative and anti-corrosion properties.

　　然而，當遭遇火災，溫度升高到一定程度（一般為 100℃ - 200℃）時，涂層會發生化學變化，迅速膨脹形成一層厚厚的海綿狀炭質泡沫層。該泡沫層的導熱系數極低，能有效隔絕熱量傳遞，將電纜與高溫火焰隔離開來，延緩電纜因高溫導致的絕緣層老化、熔化等問題，從而保證電纜在一定時間內正常運行，為人員疏散和火災撲救爭取寶貴時間 。

　　However, when encountering a fire and the temperature rises to a certain extent (generally 100 ℃ -200 ℃), the coating will undergo chemical changes and rapidly expand to form a thick sponge like carbonaceous foam layer. The thermal conductivity of the foam layer is extremely low, which can effectively isolate the heat transfer, isolate the cable from the high temperature flame, and delay the aging and melting of the insulation layer caused by the high temperature of the cable, so as to ensure the normal operation of the cable within a certain period of time, and win valuable time for personnel evacuation and fire fighting.

　　除了膨脹型防火涂料，還有一些橋架會采用非膨脹型防火涂料。此類涂料主要依靠自身的難燃性、低導熱性以及對金屬的保護作用來實現防火。它在高溫下會形成一層致密的陶瓷狀硬殼，阻止火焰和熱量對橋架及內部電纜的侵襲，同時抑制金屬在高溫下的氧化反應，增強橋架的結構穩定性。

　　In addition to expandable fireproof coatings, some bridge frames also use non expandable fireproof coatings. This type of coating mainly relies on its own flame retardancy, low thermal conductivity, and protective effect on metals to achieve fire prevention. It forms a dense ceramic like hard shell at high temperatures, preventing flames and heat from invading the bridge and internal cables, while suppressing metal oxidation reactions at high temperatures and enhancing the structural stability of the bridge.

　　防火電纜橋架的結構設計也是其實現防火功能的重要因素。許多防火電纜橋架采用雙層或多層結構設計，層與層之間形成空氣隔熱層。空氣是熱的不良導體，能夠有效阻擋熱量的傳導，如同給橋架內部的電纜穿上了一層 “隔熱衣”。

　　The structural design of fire-resistant cable trays is also an important factor in achieving their fire-resistant function. Many fire-resistant cable trays adopt a double-layer or multi-layer structure design, forming an air insulation layer between layers. Air is a poor conductor of heat, which can effectively block the conduction of heat, just like putting a layer of "insulation" on the cables inside the bridge.

　　當外界發生火災時，這層空氣隔熱層可以顯著降低熱量傳遞到電纜的速度，使電纜在高溫環境下保持相對較低的溫度，延長電纜的正常工作時間。

　　When a fire occurs outside, this air insulation layer can significantly reduce the speed of heat transfer to the cable, keeping the cable at a relatively low temperature in high temperature environments and extending the normal working time of the cable.

　　此外，橋架的連接處和接縫部位也經過特殊處理。這些部位通常會采用防火密封膠條或防火堵料進行密封，確保橋架整體形成一個相對封閉的空間。這樣一來，不僅可以防止火焰和高溫氣體進入橋架內部，還能避免電纜燃燒產生的有毒煙霧和火焰通過縫隙蔓延到其他區域，有效阻止火災的擴散，保障整個電力系統及周邊環境的。

　　In addition, the connection and joint parts of the bridge frame have also undergone special treatment. These parts are usually sealed with fireproof sealing strips or fireproof blocking materials to ensure that the bridge as a whole forms a relatively enclosed space. In this way, not only can flames and high-temperature gases be prevented from entering the interior of the cable tray, but toxic smoke and flames generated by cable combustion can also be prevented from spreading to other areas through gaps, effectively preventing the spread of fires and ensuring the safety of the entire power system and surrounding environment.

　　本文由濟南電纜橋架友情奉獻.更多有關的知識請點擊:http://www.zkhtkj.cn真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Jinan Cable Bridge For more information, please click: http://www.zkhtkj.cn Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.