氧化鎂電纜的簡介 Introduction of Magnesium Oxide Cable

http://www.chinaqdzhenhua.com銅芯銅護套氧化鎂絕緣防火電纜(以下簡稱氧化鎂電纜)，是一種外層采用無縫銅管護套、中間充填輕燒鎂粉作絕緣材料、以單股銅棒作為導體的新型電纜。它不但能耐高溫、防火、防爆、阻燃，而且載流量大、外徑小、機械強度高、使用壽命長、一般不需要獨立接地導線。因此，氧化鎂電纜被廣泛應用于危險、惡劣、高溫的環境中，如核電站、冶金、化工、礦井、制窯等。近年來，隨著各種技術工藝的蓬勃發展，氧化鎂電纜也較多的應用于高層樓房、機場、碼頭、地鐵等民用建筑，用以保障在火災情況下消防水泵、消防電梯、局部照明、應急疏散指示、保安監視、防煙排煙系統、自備電源等消防用電及重要設備的不間斷運行。

氧化鎂電纜的構造與型號規格：

氧化鎂防火電纜制造工藝比較復雜。主要有兩種方法，一是先在外層的無縫銅管與核心的銅芯導體之間灌入輕燒鎂粉，然后進行壓實；二是先將輕燒鎂粉壓制成空心的圓柱，將它穿入導體和銅管之間，然后通過拉拔——退火——再拉拔等多道工序循環反復進而制成電纜。需要注意的是，在氧化鎂電纜的加工過程中需要不斷檢測氧化鎂的密實性和銅管的氣密性等項目。通過對氧化鎂電纜制作過程和方法的了解，我們可以看出電纜的結構主要由三部分組成：外層的無縫銅管護套、中間起絕緣作用的輕燒鎂粉、核心作為導體的銅棒。

氧化鎂電纜的型號可以分為BTTQ輕型電纜（500V級）和BTTZ重型電纜（750V級）兩種，凱賓斯基項目主要為BTTZ重型電纜。其規格主要有單芯、二芯、三芯、四芯、七芯、十二芯等。單芯至四芯的氧化鎂電纜主要用于動力、照明，七芯以上的主要用于通訊、控制。單芯電纜線最大截面可達4002ｍ㎡，二芯至四芯電纜芯線最大截面為25ｍ㎡。

http://www.chinaqdzhenhua.com Copper core copper sheathed magnesium oxide insulated fire-resistant cable (hereinafter referred to as magnesium oxide cable) is a seamless copper tube sheath on the outer layer and light-burned magnesium powder filled as insulation material in the middle New type of cable with single-stranded copper rod as conductor. It not only can withstand high temperature, fire, explosion, flame retardant, but also has large current carrying capacity, small outer diameter, high mechanical strength, long service life, and generally does not require independent grounding wires. Therefore, magnesium oxide cables are widely used in dangerous, harsh and high-temperature environments, such as nuclear power plants, metallurgy, chemicals, mines, and kiln manufacturing. In recent years, with the vigorous development of various technologies, magnesium oxide cables have also been used in high-rise buildings, airports, terminals, subways and other civil buildings to protect fire pumps, fire elevators, local lighting, Uninterrupted operation of emergency evacuation instructions, security surveillance, smoke prevention and exhaust systems, self-provided power supplies and other important fire equipment.

Structure and model specifications of magnesium oxide cable:

The manufacturing process of magnesium oxide fireproof cable is relatively complicated. There are two main methods. First, lightly burned magnesium powder is poured between the seamless copper tube on the outer layer and the core copper conductor, and then compacted. Second, the lightly burned magnesium powder is pressed into a hollow cylinder. It is inserted between the conductor and the copper pipe, and then it is repeated through drawing, annealing, and drawing to make a cable. It should be noted that during the processing of magnesium oxide cables, it is necessary to continuously check the compactness of magnesium oxide and the air tightness of copper pipes. By understanding the manufacturing process and method of magnesium oxide cable, we can see that the structure of the cable is mainly composed of three parts: the seamless copper tube sheath of the outer layer, light-burned magnesium powder that plays an insulating role in the middle, and copper with the core as the conductor. Baton.

The types of magnesium oxide cables can be divided into BTTQ light cables (500V class) and BTTZ heavy cables (750V class). The Kempinski project is mainly BTTZ heavy cables. Its specifications are mainly single-core, two-core, three-core, four-core, seven-core, twelve-core and so on. Single-core to four-core magnesium oxide cables are mainly used for power and lighting, and more than seven cores are mainly used for communication and control. The maximum cross-section of single-core cable can reach 4002m㎡, and the maximum cross-section of two-core to four-core cable core is 25m㎡.