Square corrugated pipe

Abstract

The square corrugated pipe includes corrugated pipe, positioning screws and nuts, and features that the pressed square corrugated pipe has connecting flanges welded to its ends, square stainless steel corrugated pipe of wall thickness of 0.3-0.6 mm, and the positioning screws and the corresponding nuts are set in the connecting holes of the flanges. The present invention solves the technological problems of compression capacity, flexibility, five-dimensional displacement regulation and compensation, and aperture and shape matching.

Description

Technical field: [0001] The invention relates to a bellows, in particular to a square bellows with a five-dimensional displacement adjustment and compensation function for a large-diameter square lens used in a large-scale high-power high-vacuum laser device. Background technique: [0002] The structure of the Chinese national standard GB16749 "Pressure Vessel Corrugated Expansion Joint" is as follows: figure 1 As shown, it is composed of end pipe 7, end plate 8, bellows 4, positioning screw 1, nut 2 and inner bushing 6. The bellows 4, the main component of the corrugated expansion joint, has axial and lateral deformation capabilities, can compensate thermal displacement and mechanical displacement, and realize flexible connection of pipelines. However, this kind of wave expansion joint is only suitable for the connection displacement compensation of general pipelines, and is not suitable for the comprehensive displacement compensation requirements of five-dimensional adjus...

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Problems solved by technology

However, this kind of wave expansion joint is only suitable for the connection displacement compensation of general pipelines, and is not suitable for the comprehensive displacement compensation requirements of five-dimensional adjustment of optical components in the vacuum system. The problem is:

[0003] 1. The wall thickness of the bellows is more than 1mm, so that the bellows are less flexible and have higher single-wave rigidity;

[0004] 2. The wave height of the bellows is large, and the wave height increases with the increase of the bellows diameter due to the relationship of the pressure. For example, when the diameter is Φ300mm, the wave height is 40mm; when the diameter is Φ50mm, the wave height will increase to 50mm, so that the entire The space occupied by the tube increases, so it cannot be used in places with limited space, and at the same time, it needs to increase the vacuum capacity configuration;

[0005] 3. The gap between the inner bushing in the bellows and the bellows is small, so that the bellows can only achieve axial expansion compensation and a small amount of lateral two-dimensional displacement compensation;

[0006] 4. The diameter of the bellows is circular. When the diameter of the beam in the vacuum optical system is square, the space utilization rate will be reduced due to the mismatch of the shape; especially when the array of square optical elements is arranged, the square beam of the array will be Increased spacing increases space and requires more vacuum capacity

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