在建筑施工領(lǐng)域，電梯門套作為連接電梯井道與建筑墻體的關(guān)鍵構(gòu)件，其防火性能直接關(guān)系到建筑整體消防安全。泰安地區(qū)工地使用的電梯門套是否具備防火特性，需從材料選擇、工藝標(biāo)準(zhǔn)及實(shí)際應(yīng)用三個(gè)維度展開分析。

　　In the field of construction, elevator door frames serve as key components connecting elevator shafts and building walls, and their fire resistance directly affects the overall fire safety of the building. Whether the elevator door frames used in construction sites in Tai'an area have fire resistance characteristics needs to be analyzed from three dimensions: material selection, process standards, and practical application.

　　一、防火性能的材料基礎(chǔ)

　　1、 Material basis for fire resistance performance

　　電梯門套的防火性能主要由基材與表面處理工藝決定。當(dāng)前主流材質(zhì)包括：

　　The fire resistance of elevator door frames is mainly determined by the substrate and surface treatment process. The current mainstream materials include:

　　金屬復(fù)合材料：以鍍鋅鋼板或鋁合金為基材，內(nèi)部填充巖棉、硅酸鋁等A級不燃材料。

　　Metal composite material: based on galvanized steel sheet or aluminum alloy, filled with A-level non combustible materials such as rock wool and aluminum silicate inside.

　　石材復(fù)合板：天然花崗巖或大理石與陶瓷薄板復(fù)合，耐火極限超2小時(shí)。泰安某高層住宅項(xiàng)目應(yīng)用中，石材門套經(jīng)消防部門專項(xiàng)檢測，火焰蔓延指數(shù)為0，煙氣毒性達(dá)到準(zhǔn)安全三級。

　　Stone composite board: natural granite or marble combined with ceramic thin plates, with a fire resistance limit of over 2 hours. In the application of a high-rise residential project in Tai'an, the stone door frame has been specially tested by the fire department, and the flame spread index is 0, with smoke toxicity reaching quasi safety level three.

　　改性塑料：采用阻燃PC/ABS合金，氧指數(shù)達(dá)32%以上。某工地實(shí)驗(yàn)室模擬火災(zāi)場景，改性塑料門套在離火自熄，無熔融滴落現(xiàn)象，避免火勢縱向蔓延。

　　Modified plastic: Made of flame-retardant PC/ABS alloy, with an oxygen index of over 32%. A construction site laboratory simulated a fire scenario, where the modified plastic door frame automatically extinguished after leaving the fire without melting or dripping, avoiding the longitudinal spread of the fire.

　　二、工藝標(biāo)準(zhǔn)的防火保障

　　2、 Fire protection of process standards

　　密封結(jié)構(gòu)：門套與墻體間隙填充防火密封膠。

　　Sealing structure: Fill the gap between the door frame and the wall with fireproof sealant.

　　防煙設(shè)計(jì)：門套頂部設(shè)置不銹鋼擋煙垂壁，與消防聯(lián)動系統(tǒng)配合，可在火災(zāi)確認(rèn)后自動下垂，形成有效防煙分區(qū)。

　　Smoke prevention design: The top of the door frame is equipped with a stainless steel smoke barrier wall, which, in conjunction with the fire linkage system, can automatically sag after a fire is confirmed, forming an effective smoke prevention zone.

　　耐火構(gòu)造：門套轉(zhuǎn)角處采用L型防火角碼連接，經(jīng)極限載荷測試，在300℃環(huán)境下保持連接強(qiáng)度，防止門套脫落形成煙囪效應(yīng)。

　　Fire resistant construction: The corner of the door frame is connected with an L-shaped fireproof corner code. After ultimate load testing, the connection strength is maintained at 300 ℃ to prevent the door frame from falling off and forming a chimney effect.

　　三、泰安工地的實(shí)際應(yīng)用驗(yàn)證

　　3、 Practical application verification of Tai'an construction site

　　住宅項(xiàng)目案例：泰安某33層住宅樓電梯門套選用2.0mm厚鍍鋅鋼板包覆硅酸鈣板，經(jīng)實(shí)體火災(zāi)試驗(yàn)，在60分鐘耐火試驗(yàn)中，門套背火面平均溫升，未引燃周邊可燃物。

　　Residential project case: The elevator door frame of a 33 story residential building in Tai'an was covered with 2.0mm thick galvanized steel plate and calcium silicate board. After a physical fire test, the average temperature rise of the back fire surface of the door frame during the 60 minute fire resistance test did not ignite the surrounding combustibles.

　　商業(yè)綜合體實(shí)踐：某購物中心采用石材蜂窩復(fù)合門套，配合自動噴水滅火系統(tǒng)，在模擬火情中，門套表面溫度控制在，為人員疏散爭取時(shí)間。

　　Commercial complex practice: A shopping center adopts stone honeycomb composite door frames, combined with an automatic sprinkler fire extinguishing system. In simulated fire situations, the surface temperature of the door frames is controlled at to buy time for personnel evacuation.

　　工業(yè)廠房應(yīng)用：某食品加工廠電梯門套選用改性酚醛樹脂板，在含油霧環(huán)境中，經(jīng)消防部門專項(xiàng)檢測，閃點(diǎn)達(dá)，顯著降低次生火災(zāi)風(fēng)險(xiǎn)。

　　Industrial plant application: The elevator door frame of a certain food processing plant uses modified phenolic resin board. In an oil mist environment, after special testing by the fire department, the flash point reaches, significantly reducing the risk of secondary fires.

　　四、防火性能的認(rèn)證與維護(hù)

　　4、 Certification and maintenance of fire resistance performance

　　型式檢驗(yàn)：正規(guī)廠家需提供國家防火建筑材料質(zhì)量監(jiān)督檢驗(yàn)中心出具的檢測報(bào)告，重點(diǎn)核查燃燒增長速率指數(shù)、產(chǎn)煙毒性等關(guān)鍵指標(biāo)。

　　Type inspection: Legitimate manufacturers are required to provide a testing report issued by the National Fire resistant Building Materials Quality Supervision and Inspection Center, with a focus on verifying key indicators such as combustion growth rate index and smoke toxicity.

　　現(xiàn)場驗(yàn)收：安裝完成后需進(jìn)行門套完整性測試，使用紅外熱像儀檢測縫隙處溫升，確保不超規(guī)范限值。

　　On site acceptance: After installation, a door frame integrity test is required, and an infrared thermal imager is used to detect the temperature rise at the gap to ensure that it does not exceed the specified limit.

　　維護(hù)管理：每半年檢查防火密封條彈性，使用測厚儀檢測門套基材厚度，腐蝕量超30%時(shí)需整體更換。

　　Maintenance management: Check the elasticity of the fireproof sealing strip every six months, use a thickness gauge to measure the thickness of the door frame substrate, and replace it as a whole when the corrosion exceeds 30%.

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