久草福利视频-久久精品综合-久久不射网-天天插夜夜操-婷婷99-国产伦精品一区二区三区四区免费-www.日本高清-亚洲国产专区-日韩免费专区-夜夜操夜夜干-中文字幕第23页-久久爱99-欧美区国产区-中文有码在线播放-2017狠狠干-天天射,天天干-国产av不卡一区二区-99久久久无码国产精品不卡-日韩亚洲欧美中文字幕-99热都是精品

　　地下室排煙管道設計是建筑防火設計中的重要環節，其合理性直接關系到火災時人員疏散與消防救援的效率。設計過程中需嚴格遵循相關規范，同時規避常見誤區，以下從多個維度闡述關鍵禁忌事項。

　　The design of basement smoke exhaust ducts is an important part of building fire protection design, and its rationality directly affects the efficiency of personnel evacuation and fire rescue during a fire. During the design process, it is necessary to strictly follow relevant specifications and avoid common misconceptions. The following elaborates on key taboos from multiple dimensions.

　　管道布局規劃階段需避免兩大誤區。首先，忌盲目追求最短路徑而忽視防火分區劃分。排煙管道穿越防火分區時，必須設置公稱動作溫度280℃的防火閥，且穿越處縫隙需采用不燃材料嚴密填塞。若為縮短管長而省略防火閥，火災高溫可能導致煙氣突破防火分隔，引發火勢蔓延。其次，忌將排煙口與安全出口貼鄰布置。規范要求排煙口與最近安全出口邊緣水平距離應大于1.5米，若違反此規定，火災時高溫煙氣可能直接沖擊疏散通道，威脅人員生命安全。

　　Two major misconceptions need to be avoided during the pipeline layout planning phase. Firstly, avoid blindly pursuing the shortest path and neglecting the division of fire zones. When the smoke exhaust duct passes through a fire compartment, a fire damper with a nominal operating temperature of 280 ℃ must be installed, and the gaps at the crossing must be tightly filled with non combustible materials. If the fire damper is omitted to shorten the pipe length, the high temperature of the fire may cause smoke to break through the fire separation, leading to the spread of the fire. Secondly, avoid placing smoke exhaust outlets adjacent to safety exits. The standard requires that the horizontal distance between the smoke exhaust outlet and the nearest safety exit edge should be greater than 1.5 meters. If this regulation is violated, high-temperature smoke may directly impact the evacuation passage during a fire, posing a threat to personnel safety.

　　管道系統設計存在三項核心禁忌。其一，排煙量計算忌簡單套用公式。需根據空間凈高、火災荷載密度等參數綜合確定，例如層高超過6米的場所，排煙量需按60m3/(h·㎡)計算，且不小于15000m3/h。其二，忌忽視管道耐火極限要求。排煙管道穿越防火分區、防火隔墻時，其隔熱層厚度不應小于25mm，且管道表面溫度不應超過100℃。若采用鍍鋅鋼板等普通材料，必須外敷不燃隔熱層。其三，忌將補風系統與排煙系統共用管道。補風管道需獨立設置，且補風量不應小于排煙量的50%，以確保火災時形成有效氣流組織。

　　There are three core taboos in pipeline system design. Firstly, the calculation of smoke exhaust should avoid simply applying formulas. It needs to be determined comprehensively based on parameters such as spatial net height and fire load density. For example, in places with a floor height exceeding 6 meters, the smoke exhaust volume should be calculated at 60m 3/(h · ㎡) and not less than 15000m 3/h. Secondly, it is important not to overlook the fire resistance limit requirements for pipelines. When the smoke exhaust pipe passes through the fire compartment or fire partition wall, the thickness of its insulation layer should not be less than 25mm, and the surface temperature of the pipe should not exceed 100 ℃. If ordinary materials such as galvanized steel plates are used, a non combustible insulation layer must be applied externally. Thirdly, avoid sharing the ventilation system with the smoke exhaust system. The supplementary air duct should be independently installed, and the supplementary air volume should not be less than 50% of the smoke exhaust volume to ensure effective airflow organization during a fire.

　　設備選型與安裝環節需規避四類問題。排煙風機忌選用普通通風機，必須采用軸流式或離心式消防排煙專用風機，其耐高溫性能需滿足280℃條件下連續運轉30分鐘的要求。管道連接忌采用非金屬軟連接，防火閥至排煙口段應采用金屬管道，連接處需焊接或采用法蘭連接并跨接接地。排煙口設置忌被裝飾物遮擋，其底邊距地面高度宜為2.0-2.5米，且應處于儲煙倉范圍內。最后，忌忽視系統調試環節，需通過聯動測試驗證排煙口開啟、風機啟動、防火閥關閉等動作的時序性，確保火災時系統能按預設邏輯運行。

　　There are four types of issues that need to be avoided in the equipment selection and installation process. Ordinary ventilation fans should not be used for smoke exhaust. Axial or centrifugal fire-fighting smoke exhaust fans must be used, and their high temperature resistance must meet the requirement of continuous operation for 30 minutes at 280 ℃. Non metallic soft connections should not be used for pipeline connections. The section from the fire damper to the exhaust outlet should use metal pipelines, and the connection should be welded or flanged and grounded. The smoke exhaust outlet should not be obstructed by decorations, and its bottom edge should be 2.0-2.5 meters above the ground, and it should be located within the range of the smoke storage compartment. Finally, do not neglect the system debugging process. It is necessary to verify the timing of actions such as opening the smoke exhaust outlet, starting the fan, and closing the fire damper through linkage testing to ensure that the system can operate according to the preset logic during a fire.

　　特殊場景設計需注意五項要點。地下汽車庫忌將排煙管道與排風管道合并，排煙口應沿車行方向均勻布置，且與最遠點水平距離不應大于30米。設備用房排煙系統忌與通風系統混用，配電室、發電機房等應設置獨立機械排煙設施。對于超長地下室，忌設置單一排煙系統，當長度超過60米時，應劃分防煙分區并設置機械排煙系統。自然排煙窗忌設置在走道端部，其開啟面積應滿足規范要求，且手動開啟裝置距地面高度宜為1.3-1.5米。最后，忌忽視日常維護管理，需定期清理管道積塵，檢查防火閥、排煙口等部件功能，確保系統始終處于良好戰備狀態。

　　Special scenario design should pay attention to five key points. Underground garages should avoid merging smoke exhaust pipes with exhaust ducts. Smoke exhaust outlets should be evenly arranged along the direction of vehicle travel, and the horizontal distance from the farthest point should not exceed 30 meters. The smoke exhaust system in the equipment room should not be mixed with the ventilation system, and independent mechanical smoke exhaust facilities should be installed in the distribution room, generator room, etc. For ultra long basements, it is forbidden to install a single smoke exhaust system. When the length exceeds 60 meters, smoke prevention zones should be divided and mechanical smoke exhaust systems should be installed. Natural smoke exhaust windows should not be installed at the end of the aisle, and their opening area should meet the regulatory requirements. The height of the manual opening device from the ground should be 1.3-1.5 meters. Finally, it is important not to neglect daily maintenance and management. It is necessary to regularly clean up dust accumulation in pipelines, check the functionality of components such as fire dampers and exhaust vents, and ensure that the system is always in good combat readiness.

　　地下室排煙管道設計需兼顧規范性與實用性，通過科學計算、合理選型、精細施工，構建可靠的防火生命線。設計人員應深入理解規范內涵，避免經驗主義錯誤，以專業素養守護建筑消防安全。

　　The design of basement smoke exhaust pipes should balance standardization and practicality, and build a reliable fire lifeline through scientific calculation, reasonable selection, and meticulous construction. Designers should have a deep understanding of the connotation of standards, avoid empirical errors, and safeguard building fire safety with professional competence.

　　本文由山東通風管道友情奉獻.更多有關的知識請點擊:http://www.qdqrsj88.com真誠的態度.為您提供為全面的服務.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 Shandong Ventilation Duct For more information, please click: http://www.qdqrsj88.com Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.