Double-wall pipe for dual-fuel propelling ship

Abstract

The invention relates to a double-wall pipe for a dual-fuel propelling ship. The double-wall pipe comprises an inner pipe body and an outer pipe body. The inner pipe body is interiorly connected into the outer pipe body. A plurality of evenly-distributed supporting plates are arranged between one end of the inner pipe body and one end of the outer pipe body. One end of each supporting plate is connected to the outer surface of the inner pipe body in a welding manner, and the supporting plates are evenly distributed. Cushion blocks are arranged at the other ends of the supporting plates and made of Teflon materials. The other ends of the cushion blocks support the inner surface of the outer pipe body. The double-wall pipe is simple in structure, the supporting plates are arranged between one end of the inner pipe body and one end of the outer pipe body, the Teflon cushion blocks are arranged at the outer ends of the supporting plates, and therefore insulation can be effectively carried out, and friction is reduced, wherein the inner pipe body and the outer pipe body are coaxial. The double-wall pipe has the beneficial effects that the section area is maximized, the resistance is reduced, and the ventilation rate is guaranteed; and the manufacturing technology is simple, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to a pipeline, in particular to a double-walled pipe for dual-fuel propulsion ships. Background technique [0002] LNG is a hydrocarbon-based gas mixture, the main component is methane, the explosion limit (mixing ratio with air) is 5~15%; liquid LNG is -164 ℃. [0003] With the rise of oil prices and the increasingly high requirements for marine environmental protection in international regulations, LNG, as a marine fuel, has obvious advantages in reducing costs and reducing atmospheric emissions, especially NOx, CO-2, SOx and particulate (smoke) emissions. , known as green energy. In recent years, LNG-fueled power ships have been favored. [0004] For ships using LNG as fuel, the engine room is usually designed in accordance with the intrinsically safe type. Classification society regulations and regulations require that the gas pipeline in the intrinsically safe engine room adopts double-wall pipes. At least 30 times the inn...

AI Technical Summary

Problems solved by technology

[0004] For ships that use LNG as fuel, the engine room is usually designed according to the intrinsically safe type. Classification society rules and regulations require that the gas pipeline in the intrinsically safe engine room adopts double-wall pipes, and the air exchange rate within the scope of the double-wall pipes must reach this double-wall. At least 30 times the inner volume of the tube, the manufacture of double-walled tubes on the existing market is more complicated and the cost is higher

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