聚氨酯保溫管施工特點
Construction Characteristics of Polyurethane Thermal Insulation Pipe
1.下降工程造價
1. reduce project cost
據(jù)有關(guān)部門測算，雙管制供熱管道，一般情況下能夠下降工程造價的25%(選用玻璃鋼做保護層)和10%(選用高密度聚乙烯做保護層)左右。
According to the calculation of relevant departments, the cost of double-pipe heating pipeline can generally be reduced by 25% (using FRP as protective layer) and 10% (using high-density polyethylene as protective layer).
2.熱損耗低，節(jié)約能源
2. Low Heat Loss and Energy Conservation
高溫預(yù)制直埋保溫管其導(dǎo)熱系數(shù)為：λ=0.013-0.03kcalm·h·oC，比其他過去常用的管道保溫材料低得多，保溫效果提高4~9倍。再有其吸水率很低，約為0.2kgm2。吸水率低的原因是因為聚氨酯泡沫的閉孔率高達(dá)92%左右。低導(dǎo)熱系數(shù)和低吸水率，加上保溫層和外面防水功能好的高密度聚乙烯或玻璃鋼保護殼，改變了傳統(tǒng)地溝敷設(shè)供熱管道“穿濕棉襖”的情況，大大削減了供熱管道的整體熱損耗，熱網(wǎng)熱損失為2%，小于10%的標(biāo)準(zhǔn)要求。
The thermal conductivity of high temperature prefabricated directly buried insulating pipe is as follows: lambda = 0.013-0.03kcalm h oC, which is much lower than other commonly used pipeline insulation materials in the past, and the insulation effect is increased by 4-9 times. And its water absorption is very low, about 0.2 kgm2. The reason of low water absorption is that the obturator rate of polyurethane foam is as high as 92%. Low thermal conductivity and low water absorption, together with high density polyethylene or fiberglass reinforced plastic protective shell with good insulation layer and external waterproof function, have changed the situation of traditional trench laying heating pipeline "wearing wet cotton jacket", greatly reduced the overall heat loss of heating pipeline, heat loss of heating network is 2%, less than the international standard requirement of 10%.
3.防腐，絕緣功能好，運用壽命長
3. Anti-corrosion, good insulation function, long service life
高溫預(yù)制直埋保溫管因為聚氨酯保溫管保溫層緊密地粘結(jié)在鋼管外皮，隔絕了空氣和水的滲入，能起到良好的防腐作用。一起它的發(fā)泡孔都是閉合的，吸水性很小。高密度聚乙烯外殼、玻璃鋼外殼均具有良好的防腐、絕緣和機械功能。因而，作業(yè)鋼管外皮很難遭到外界空氣和水的腐蝕。只要管道內(nèi)部水質(zhì)處理好，據(jù)國外資料介紹，高溫預(yù)制直埋保溫管的運用壽命可達(dá)50年以上，比傳統(tǒng)的地溝敷設(shè)、架空敷設(shè)運用壽命高3~4倍。
High-temperature prefabricated direct-buried insulating pipe has good anti-corrosion effect because the insulating layer of polyurethane insulating pipe is tightly bonded to the outer skin of steel pipe, which isolates the infiltration of air and water. Together, its foam holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical functions. Therefore, it is very difficult for the outer skin of the working steel pipe to be corroded by the outside air and water. As long as the internal water quality of the pipeline is well treated, according to foreign information, the service life of the high temperature prefabricated directly buried insulation pipe can reach more than 50 years, which is 3-4 times longer than that of the traditional trench laying and overhead laying.
4.占地少，施工快，有利環(huán)境保護
4. It occupies less land, constructs quickly, and is beneficial to environmental protection.
直埋供熱管道不需要砌筑巨大的地溝，只需將保溫管埋人地下，因而大大削減了工程占地，削減土方開挖量約50%以上，削減土建砌筑和混凝土量90%。一起，保溫管加工和現(xiàn)場挖溝平行進行，只需現(xiàn)場接頭，能夠縮短工期約50%以上,預(yù)制直埋保溫管廣泛用于液體、氣體的運送管網(wǎng)，化工管道保溫工程石油、化工、集中供熱熱網(wǎng)、中央空調(diào)通風(fēng)管道、市政工程等。直埋保溫管是一種保溫功能好，加安全可靠，工程造價低的直埋預(yù)制保溫管。有用的解決了鄉(xiāng)鎮(zhèn)集中供熱中130℃－600℃高溫輸熱用預(yù)制直埋保溫管的保溫、滑動光滑和裸露管端的防水問題。直埋保溫管不只具有傳統(tǒng)地溝和架空敷設(shè)管道難以比較的先進技術(shù)、有用功能，并且還具有顯著的社會效益和經(jīng)濟效益，也是供熱節(jié)能的有力辦法。預(yù)制直埋保溫管選用直埋供熱管道技術(shù)，標(biāo)志著中國供熱聚氨酯保溫管技術(shù)發(fā)展現(xiàn)已進入了新的起點。
Directly buried heating pipelines do not need to build huge trenches. They only need to bury heat preservation pipelines underground, which greatly reduces the construction area, reduces the amount of earthwork excavation by more than 50%, and reduces the amount of civil masonry and concrete by 90%. Together, heat preservation pipe processing and digging ditches are carried out in parallel with each other. Only field joints can shorten the construction period by more than 50%. Prefabricated directly buried heat preservation pipes are widely used in liquid and gas transportation network, chemical pipeline heat preservation engineering petroleum, chemical industry, central heating and heating network, central air conditioning and ventilation pipeline, municipal engineering, etc. Direct buried insulation pipe is a kind of prefabricated insulation pipe with good thermal insulation function, safety and reliability, and low cost. The problems of heat preservation, smooth sliding and waterproofing of bare pipe ends of prefabricated directly buried insulating pipes for heat transfer at 130-600 (?) C in Township Central heating are solved. Direct buried insulation pipe not only has advanced technology and useful functions that are difficult to compare with traditional trench and overhead pipeline laying, but also has significant social and economic benefits, and is also a powerful way to save energy for heating. The prefabricated direct buried insulation pipe adopts the technology of direct buried heating pipe, which indicates that the development of polyurethane insulation pipe technology for heating in China has entered a new starting point.
聚氨酯保溫管殼：用于室內(nèi)外各種管道，中央空調(diào)管道、化工、醫(yī)藥等工業(yè)管道的保溫、保冷。
Polyurethane insulation pipe shell: used for indoor and outdoor pipelines, central air-conditioning pipelines, chemical industry, medicine and other industrial pipelines to keep warm and cold.
選用高功能聚醚多元醇和多次甲基多苯基多異氰酸酯為主要原料，在催化劑、發(fā)泡劑、表面活性劑等作用下，經(jīng)化學(xué)反映發(fā)泡而成
Highly functional polyether polyols and polymethylene polyphenyl polyisocyanate were selected as the main raw materials, and foamed by chemical reaction under the action of catalyst, foaming agent and surfactant.
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