Engine natural gas supply double-wall corrugated pipe

Abstract

The invention belongs to the technical field of engine manufacturing, and particularly relates to an engine natural gas supply double-wall corrugated pipe. The engine natural gas supply double-wall corrugated pipe comprises an inner corrugated pipe body and an outer corrugated pipe body arranged on the outer side of the inner corrugated pipe body and wrapping the inner corrugated pipe body, a flange is arranged at the end of the inner corrugated pipe body and the end of the outer corrugated pipe body, a first sleeve pipe is arranged on the inner corrugated pipe body, the other end of the first sleeve pipe is fixed to the flange, a second sleeve pipe is arranged on the outer corrugated pipe body, the other end of the second sleeve pipe is fixed to the flange, and multiple ventilation holes are formed in the flange. One ends of the sleeve pipes are connected with the flange, the other ends of the sleeve pipes are connected with the corrugated pipe, in this way, effective welding can be achieved, and the problems of vibration and loosening of a welding seam can be solved; and in addition, the multiple holes are formed in the flange, the concentration of natural gas which may leaks in a ventilation pipe is reduced through forced ventilation, centralized fuel gas monitoring is carried out, and safety of a fuel gas supply system is improved.

Description

technical field [0001] The application belongs to the technical field of engine manufacturing, and in particular relates to a double-wall bellows for engine natural gas supply. Background technique [0002] The statements in this section merely provide background technical information relevant to this application and do not necessarily constitute prior art. [0003] At present, bellows are used in the gas supply system of marine dual-fuel engines and gas engines, but the bellows are designed with a thin-walled structure. During the welding process with the flanges at both ends and during the use of the engine, the welds are easy to loosen, while the flanges at both ends The way of sealing relying on the sealing gasket is easy to be poorly sealed. Contents of the invention [0004] In order to solve the above problems, the present application provides a double-wall bellows for engine natural gas supply. [0005] The purpose of this application is to provide a double-wall ...

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Problems solved by technology

[0003] At present, bellows are used in the gas supply system of marine dual-fuel engines and gas engines, but the bellows are designed with a thin-walled structure. During the welding process with the flanges at both ends and during the use of the engine, the welds are easy to loosen, while the flanges at both ends The way of sealing depends on the sealing gasket is easy to be poorly sealed

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