Stainless steel seamless steel pipe used outside nuclear power station safety shell

Abstract

The invention discloses a stainless steel seamless steel pipe used outside a nuclear power station safety shell. A first steel pipe and a second steel pipe are included. A connecting device is arranged on the outer sides of the first steel pipe and the second steel pipe, and the first steel pipe and the second steel pipe are movably connected through the connecting device. The connecting device comprises a baffle, a first seal ring, a supporting shell, a second seal ring, limiting blocks, limiting pieces, a supporting plate, a limiting plate and a clamping and connecting piece, and the baffleis fixedly connected to one end in the first steel pipe. According to the stainless steel seamless steel pipe used outside the nuclear power station safety shell, through an arranged protection device, the anti-pressing damping performance of the seamless steel pipe is improved, the service life of the seamless steel pipe is prolonged, and the safety performance of the seamless steel pipe during refrigerant transportation is improved; and in addition, through the connecting device arranged between the first steel pipe and the second steel pipe, the first steel pipe and the second steel pipe can be rapidly connected and detached, manpower is saved, and replacement between seamless steel pipes is facilitated.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipes, in particular to stainless steel seamless steel pipes for external containment of nuclear power plants. Background technique [0002] At present, as the world's energy demand continues to increase, the energy supply mode dominated by fossil fuels has faced more and more problems due to the constraints of resources, environment, transportation and other factors. Hydropower, solar energy, wind energy, tidal energy, geothermal energy, etc. are renewable energy, and are also energy production methods advocated and developed by various countries. However, as industrial energy, due to the limitation of natural conditions, they cannot yet occupy a dominant position in the energy structure. [0003] As a new energy source, nuclear energy has only a short history of more than 50 years, and there have been some problems in its application. However, with the resolution and improvement of a seri...

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Problems solved by technology

[0006] In the existing technology, the stainless steel seamless steel pipes used outside the containment of nuclear power plants are used to transport coolant for use in the reactor, while the traditional steel pipes are produced by hot cross rolling and piercing process to cause looseness inside the tube blank, tube The grain size of the billet is low, the uniformity is poor, and there is no protective measure in the bright heat treatment process of the gas in the process of making the finished product, which leads to the precipitation of carbides between the grains, and at the same time, it is easy to carburize and nitriding during the heat treatment process, and then Reduce the corrosion resistance of seamless steel pipes, and because the produced seamless steel pipes transport coolant for a long time, the seamless steel pipes remain in a low temperature state for a long time, and because there are no protective devices on the outside of the seamless steel pipes, it is easy to cause the seamless steel pipes to appear The phenomenon of crack damage reduces the service life of seamless steel pipes, and there are certain safety hazards. However, flanges are used to connect seamless steel pipes, resulting in cumbersome disassembly and assembly, which is time-consuming and laborious. For this reason, we propose the safety of nuclear power plants Stainless steel seamless steel pipe for external shell

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