黑夾克保溫管是一種保溫性能好，加安全可靠，工程造價低的直埋預制保溫管。直埋保溫管不僅具有傳統(tǒng)地溝和架空敷設管道難以比擬的先進技術、實用性能，而且還具有顯著的社會效益和經(jīng)濟效益，也是供熱節(jié)能的有力措施。
Black jacket insulation pipe is a kind of directly buried prefabricated insulation pipe with good thermal insulation performance, safety and reliability, and low engineering cost. The directly buried insulation pipe not only has the advanced technology and practical performance that traditional trench and overhead laying pipeline can't match, but also has remarkable social and economic benefits, which is also a powerful measure of heating and energy saving.
黑夾克保溫管從里到外分三層結(jié)構
The insulation pipe of black jacket is divided into three layers from inside to outside
靠前層：工作鋼管層 根據(jù)設計和客戶的要求一般選用無縫管(GB8163-87)螺旋焊管(GB9711-88;SY/T5038-92)和直縫焊管(GB3092-93)。鋼管表面經(jīng)過先進的拋丸除銹工藝處理后，鋼管除銹等級可達GB8923-1988標準中的Sa2級，表面粗糙度可達GB6060.5-88標準中R=12.5微米。
Near the front layer: according to the design and customer requirements, seamless pipe (gb8163-87), spiral welded pipe (gb9711-88; SY / t5038-92) and longitudinal welded pipe (gb3092-93) are generally selected for the working steel pipe layer. After the surface of steel pipe is treated by advanced shot blasting technology, the rust removal grade of steel pipe can reach SA2 grade in gb8923-1988 standard, and the surface roughness can reach r = 12.5 μ m in gb6060.5-88 standard.
第二層：聚氨酯保溫層用高壓發(fā)泡機在鋼管于外護層之間形成的空腔中一次性注入硬質(zhì)聚氨酯泡沫塑料原液而成。即俗稱的“管中管發(fā)泡工藝”。其作用一是防水，二是保溫，三是支撐熱網(wǎng)自重。當輸送介質(zhì)溫度為：-50℃—120℃時，選用硬質(zhì)聚氨基脲酸酯泡沫塑料做保溫層
The second layer: the polyurethane insulation layer is made of high pressure foaming machine in the cavity formed between the steel tube and the outer sheath. It is commonly known as "tube in tube foaming process". Its function is waterproof, thermal insulation, and supporting the self weight of heat supply network. When the conveying medium temperature is -50 - 120 - C, rigid polyurethane foam is chosen as insulation layer.
第三層：高密度聚乙烯保護層 預制成一定壁厚的黑色(黃色)塑料管材，其作用一是保護聚氨酯保溫層免遭機械硬物破壞，二是防腐防水。聚乙烯外套管采用高密度聚乙烯材料制成，具有極高的機械強度和優(yōu)良的耐腐蝕性能，可以保護管材在運輸、安裝及使用過程中避免因外界因素而造成的破壞。制造外套管應添加抗氧劑、紫外線穩(wěn)定劑和碳黑等。 生產(chǎn)工藝 1、上料 2、擠出 3、模具 4、冷卻 5、牽引 6、內(nèi)表面電暈處理 7、切割 8、檢驗 9、成品
The third layer: HDPE protective layer is prefabricated into a certain wall thickness of black (yellow) plastic pipe. Its function is to protect the polyurethane insulation layer from mechanical hard objects damage, and the other is anti-corrosion and waterproof. Polyethylene outer pipe is made of high density polyethylene material, which has high mechanical strength and excellent corrosion resistance. It can protect the pipe from damage caused by external factors during transportation, installation and use. Antioxidants, UV stabilizers and carbon black should be added to the outer casing. Production process 1, feeding 2, extrusion 3, die 4, cooling 5, traction 6, corona treatment of inner surface 7, cutting 8, inspection 9, finished product
黑夾克保溫管的優(yōu)點
Advantages of black jacket insulation pipe
(1)工程造價低
(1) The project cost is low
(2)占地少，施工快，有利環(huán)境保護。
(2) It has the advantages of less land occupation, fast construction and environmental protection.
(3)夾克管節(jié)約能源，防腐，絕緣性能好，使用壽命長。
(3) The jacket tube has the advantages of energy saving, anticorrosion, good insulation and long service life.
(4)均設有滲漏報警線，安全。一旦管道某處發(fā)生滲漏，通過報警線的傳導，便可在專用檢測儀表上顯示出保溫管道滲水、漏水的準確位置及滲漏程度的大小，以便通知檢滲人員迅速處理漏水的管段，保證供熱管網(wǎng)的安全運行。
(4) There are leakage alarm lines for safety. Once there is leakage in the pipeline, through the conduction of the alarm line, the accurate position and degree of leakage of the insulation pipeline can be displayed on the special detection instrument, so as to inform the leakage inspection personnel to deal with the leaking pipe section quickly and ensure the safe operation of the heating pipe network.
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