NAVIGATION
NAVIGATION
中文品名：柔性管接头，球墨铸铁
Coupling joints, because of their greater flexibility and economy, are steadily replacing flanged pipe joints in today’s plant and marine applications. Unlike flanged joints, couplings not only eliminate the need for costly welding but also compensate for extreme degrees of pipe linear expansion, vibration, and laying deflection. From chemical plants to mammoth tankers, these couplings are utilized extensively throughout plant and marine piping. As a wide range of models is available, the most common models have been selected and described below.
1. Construction: As illustrated above, the most common models consist of a middle ring (1) two followers (2) two wedge gaskets (3) four bolts & nuts (4) and two stop bolts (5) Both the middle ring and the followers are made of hot rolled steel, and the wedge gaskets are made of natural or synthetic rubber. When the bolts are tightened, the followers press the gaskets against the spherical surface of the pipes and the tapered surface of the middle rings providing a leak-tight connection. When the expansion force of the pipes exceeds the wedging force, the pipes slide and deflect within the gaps between the outer surface of the pipes and the inner surface of the middle ring and followers.
2. Features: The structural design of these flexible pipe couplings offers easy and economical pipe jointing. Pipes can be jointed easily with the use of a spanner. Centering of the pipes and finish-grinding of the pipe sections is not required. Compared with flanged pipe joints, these pipe couplings assure economical pipe jointing without the need for costly welding or any other additional procedures. Usually absorbs 65 – 135 mm of pipe linear expansion (specially available models absorb more than 200 mm of linear expansion) and a considerable degree of pipe vibration as well. Also, they allow for joint deflection up to 6 degrees and can join pipes of different material and/or diameter.
3. How to order: When ordering, please specify the following points. 1. Kind of pipes to be connected (steel, cast iron, vinyl, etc) 2. Pipe outside diameter.....mm 3. Working pressure.....kgf/cm2 4. Kind of liquid or gas of the line content (desired gasket material) 5. Rust preventive treatments (paint)
Ductile Cast Iron Middle Ring & Follower: These couplings are mainly used for oil loading pipes, ballast pipes, digester pipes and other conduits on board. These couplings are made of ductile cast iron. Couplings made of cast steel are also available upon request.
Couplings of sizes other than those listed above are also available upon request.
联轴节由于其更大的灵活性和经济性，在当今的工厂和船舶应用中正在稳步取代法兰管道接头。与法兰接头不同，联接器不仅消除了昂贵的焊接需要，而且还补偿了极端程度的管线型膨胀、振动和铺设偏差。从化工厂到巨型油轮，这些联接器在整个工厂和海洋管道中广泛使用。由于有多种型号可供选择，因此选择了最常见的型号，并在下面进行了说明。
1.结构：如上图所示，最常见的型号包括一个中环(1)、两个从动件(2)、两个楔垫片(3)、四个螺栓和螺母(4)和两个止动螺栓(5)，中环和从动件都是热轧钢制的，楔垫片是天然橡胶或合成橡胶制成的。当螺栓拧紧时，从动件将垫圈压在管道的球面和中间环的锥面上，从而实现无泄漏连接。当管子的膨胀力超过楔合力时，管子在管子外表面与中环和从动件内表面之间的间隙内滑动和偏转。
2.特点：这些挠性管接头的结构设计方便、经济。用扳手可以很容易地把管道连接起来。不需要对管道居中，也不需要对管段进行精磨。与法兰管道接头相比，这些管道接头确保了经济的管道连接，不需要昂贵的焊接或任何其他附加程序。通常可吸收65-135 mm的管道线性膨胀(特别提供的型号可吸收200 mm以上的线性膨胀)，还可吸收相当程度的管道振动。此外，它们允许接头最大偏转6度，并可以连接不同材质和/或直径的管道。
3.订购方法：订购时请注明以下几点。1.须接驳的喉管种类(钢、铸铁、乙烯基等)2.喉管外径.mm 3.工作压力...kgf/cm2 4.管路所含液体或气体种类(所需垫片材料)5.防锈处理(油漆)。
球墨铸铁中环和从动件：这些联轴器主要用于船上的装油管、压载管、消化器管和其他管道。这些联轴器是由球墨铸铁制成的。也可根据要求提供铸钢联轴器。以上所列尺寸以外的联轴器也可根据要求提供。
