Shield machine with multi-section spherical hinge structure

Abstract

The invention relates to a shield machine with a multi-section spherical hinge structure, which comprises a front shield, a middle shield, a tail shield and hinge oil cylinders, wherein a spherical ring steering structure is arranged between the front shield and the middle shield; a spherical ring steering structure is arranged between the middle shield and the tail shield; the hinge oil cylindersare respectively arranged between the front shield and the middle shield and between the middle shield and the tail shield; the shield machine achieves two-stage steering adjustment during small radius turning of the shield machine through the two spherical ring steering structures between the front shield, the middle shield and the tail shield, and when the shield machine turns, the distributionon the segment circumference of the thrust force acting on the segment end surface of the shield machine has a smaller difference. According to the invention, not only improves the amplitude of the swing of the shield body, but also the reliability of the sealing at the hinge parts of the shield machine is effectively improved and the damage to the segment is reduced.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a shield machine with a multi-section spherical hinge structure. Background technique [0002] The traditional shield machine usually adopts a planar hinged ring structure at the active hinged ring. The problems brought about by this structure are: 1) Due to the telescopic movement of the hinged cylinder, the hinged sealing ring is displaced along the surface of the plane hinged ring, so The compression amount of the hinged sealing ring is in an uneven state, and excessive compression of the hinged sealing ring will cause it to fail; 2) With the flat ring hinged form, the swing range of the shield machine equipment hinge is small, and the shield machine is required to carry out small The deflection range is small or even impossible to deflect when turning with a radius, which is not conducive to the design of construction routes. [0003] Chinese patent CN207315384U disc...

AI Technical Summary

Problems solved by technology

[0002] The traditional shield machine usually adopts a planar hinged ring structure at the active hinged ring. The problems brought about by this structure are: 1) Due to the telescopic movement of the hinged cylinder, the hinged sealing ring is displaced along the surface of the plane hinged ring, so The compression amount of the hinged sealing ring is in an uneven state, and excessive compression of the hinged sealing ring will cause it to fail; 2) With the flat ring hinged form, the swing range of the shield machine equipment hinge is small, and the shield machine is required to carry out small The deflection range is small or even impossible to deflect when turning with a radius, which is not conducive to the design of construction routes

However, the structure it adopts has a relatively large pressure difference on the end face of the segment, which is likely to cause damage to the segment and also damage the seal on the segment; Once a permanent crack occurs, it will be more troublesome to replace the subsequent segment; and, when the seal fails, it has no good protection measures, which will easily cause external liquid to seep into the shield machine, resulting in unnecessary losses

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