橡塑板/管在冷庫製冷筦道中的保溫保冷解決方案

橡塑板/管在冷庫製冷筦道中的保溫保冷解決方案


一、方案背景與痛點分析


 


冷庫製冷筦道(包括吸氣管、供液管、回氣管及並聯機組管路)長期處於-40℃~-10℃低溫環境。 傳統保溫材料(如玻璃棉、聚氨酯)在低溫下易出現以下問題:


 



痛點後果

資料脆裂、收縮開裂形成冷橋,冷量洩漏,壓縮機能耗上升

水汽滲入導致結冰冰晶破壞保溫層結構,保溫失效

表面結露滴水造成庫頂/牆面腐蝕、地面積冰、安全隱患

筦道外壁銹蝕縮短筦道壽命,新增維修成本

施工複雜(需隔汽層)工期長,人工成本高



橡塑板/管憑藉閉孔彈性結構、低溫穩定性及一體化防潮能力,是解决上述問題的理想方案。


 


 


二、橡塑資料效能優勢(針對冷庫場景)


 



名額參數對冷庫的意義

適用溫度範圍-40℃~+105℃

完全覆蓋冷庫低溫工况,無脆裂風險

導熱係數≤0.034 W/(m·K)(0℃時低溫下仍保持優异保溫效果,减少冷損

濕阻因數μ≥8000無需額外隔汽層,單層即可抗水汽滲透

吸水率≤0.2%不吸水,杜絕冰晶破壞結構

閉孔率≥90%形成獨立密閉氣泡,阻隔水汽路徑

防火等級B1級(難燃)/B2級(可燃)滿足冷庫消防規範(建議選用B1級)

柔韌性管材可彎曲,板材可裁切貼合彎頭、三通、閥門等异形部位





 


> ✅  覈心優勢:抗凍脹、免隔汽層、閉孔防潮、施工高效,大幅降低冷庫全生命週期能耗。


 


 


三、冷庫製冷筦道分級保溫方案


 


根據筦道位置、溫度及環境濕度,推薦採用差异化厚度與施工工藝。


 


3.1筦道分類與保溫等級


 



筦道類型典型溫度推薦橡塑厚度施工方式備註

低壓吸氣管(機頭前)-40℃~-25℃35~50mm(雙層錯縫)雙層+全密封冷凍庫/速凍庫覈心管段

中壓回氣管-25℃~-10℃25~35mm單層或雙層冷藏庫、冷卻庫

供液管(膨脹閥前)+10℃~+30℃13~19mm單層防止凝露即可

熱氣管(化霜管路)+40℃~+80℃19~25mm單層(耐高溫型)注意資料耐溫上限

並聯機組總管-35℃~-15℃40~50mm雙層錯縫大管徑,冷量集中



3.2厚度選擇的經驗公式(冷庫專用)


 


>對於溫差ΔT =庫溫−環境露點溫度:


> -ΔT≤30℃:橡塑厚度≥25mm


> -ΔT = 30℃~45℃:厚度≥35mm


> -ΔT≥45℃:厚度≥50mm(必須雙層)


 


示例:庫溫-25℃,環境溫度30℃,相對濕度80%(露點約26℃),ΔT = 51℃→推薦厚度50mm雙層。 *


 


 


四、施工工藝與品質控制(冷庫關鍵要點)


 


4.1資料選用


 


-管材:對應管徑的內徑匹配橡塑管(建議預縮尺寸+ 2~3mm,因低溫下資料會輕微收縮)


-板材:用於閥門、法蘭、罐體、彎頭等异形部位


-輔材:


-橡塑專用低溫膠水(-30℃下仍保持粘性)


-防水密封膠帶(鋁箔背膠或壓敏型)


-不銹鋼紮帶或耐低溫尼龍紮帶


 


4.2施工步驟(以雙層安裝為例)


 


步驟1:筦道預處理


-清除筦道表面油污、鏽跡、灰塵


-確保筦道乾燥(可用熱風槍吹幹)


 


步驟2:塗膠與第一層安裝


-在筦道外壁和橡塑管內壁均勻塗刷低溫膠水


-待膠水觸幹(約3~5分鐘),將橡塑管套入並壓緊


-縱向接縫處塗抹膠水並壓合,確保無縫隙


 


步驟3:第二層安裝(錯縫要求)


-第二層管材與第一層縱向接縫錯開180°


-兩層的環向接縫也需錯開(不小於300mm)


-第二層同樣塗膠粘貼,層間不得留空隙


 


步驟4:异形部位處理(閥門、法蘭、彎頭)


-用橡塑板材現場裁切拼貼


-彎頭可採用“蝦米腰”式分塊拼接


-所有拼縫塗膠密封,再用膠帶覆蓋加固


 


步驟5:接縫密封(最關鍵步驟)


-所有縱向、環向、异形拼縫外表面再塗一層膠水


-立即粘貼防水密封膠帶,寬度≥50mm


-膠帶搭接≥30mm,壓實無氣泡


 


步驟6:外部防護(可選)


-頻繁檢修部位:預製可拆式橡塑保溫殼(用板材製作)


-室外或高濕度區域:外包鋁箔或鍍鋅鐵皮護殼


 


五、資料選型推薦(按管徑與厚度)


 



筦道規格(mm)庫溫-25℃推薦管材內徑×厚度庫溫-35℃推薦方案

DN20(Φ25)內徑25mm×厚30mm雙層20mm+20mm

DN40(Φ48)內徑48mm×厚35mm雙層25mm+25mm

DN50(Φ60)內徑60mm×厚40mm雙層30mm+25mm

DN80(Φ89)內徑89mm×厚40mm雙層30mm+30mm

DN100(Φ114)內徑114mm×厚45mm雙層35mm+35mm

彎頭/三通

現場用40mm橡塑板裁切

 


六、方案總結


 



維度方案結論

資料選擇低溫型閉孔橡塑(耐-40℃,B1級)

厚度要求根據ΔT選擇,低溫庫強制35~50mm雙層

施工覈心雙層錯縫+全接縫專用膠粘+膠帶密封

防護要求無需隔汽層,室外或强濕區加鋁箔護殼

預期效果杜絕結露凍脹,降低冷損30%~40%,延長筦道壽命10年以上



 


 


 


 




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