Fast synchronization hydraulic system for segment assembling lifting motion

Abstract

The invention discloses a fast synchronization hydraulic system for segment assembling lifting motion. The fast synchronization hydraulic system for segment assembling lifting motion comprises a speed regulating valve, a flow distributing valve, an oil tank, a four-way servo directional valve, a synchronization controller and two lifting hydraulic branches of the same structure, wherein each of the lifting hydraulic branches of the same structure comprises a two-position four-way electromagnetic directional valve, two balance valves, a lifting hydraulic cylinder and a displacement sensor. In a lifting process of shield segments, the flow distributing valve equally distributes flow to achieve low-precision synchronization of the lifting hydraulic cylinders, meanwhile, the synchronization controller continuously detects displacement of the two lifting hydraulic cylinders, and the four-way servo directional valve regulates inlet flow of the two lifting hydraulic cylinders to compensate positional deviation of the same so as to achieve high-precision synchronization. Moreover, during extending of the lifting hydraulic cylinders, the two-position four-way electromagnetic directional valves are used for switching the lifting hydraulic cylinders to a differential mode, and accordingly extending speed is increased.

Description

technical field [0001] The invention relates to a shield segment assembly and lifting movement hydraulic system, in particular to a shield segment segment assembling and lifting movement fast synchronous hydraulic system capable of synchronizing the height of the lifting cylinder and the high-speed lifting of the segments. Background technique [0002] The segment assembly machine is one of the key subsystems of the shield equipment system. It assembles the concrete segment into a tunnel lining after the shield advances one ring, which is used to stabilize the excavated tunnel and provide a support point for the shield advance , The quality of segment assembly is directly related to the quality of tunnel construction, and also affects the adjustment of the posture during the shield tunneling process. During the process of building the annular inner wall, the segment needs to be moved from the bottom to a specific position on the inner wall of the tunnel and needs to be fine-...

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Problems solved by technology

[0003] The lifting mechanism mainly completes the radial positioning of the segment. During the segment assembly process, the lifting hydraulic cylinder needs to expand and contract at multiple specific angles. The traditional hydraulic system is generally supplied by a variable pump, and the proportional directional valve controls two parallel lifting Hydraulic cylinders, there is a certain parallelism error in the assembly of the two lifting hydraulic cylinders, and the variability of the lifting conditions, resulting in different loads of the two lifting hydraulic cylinders, resulting in differences in the expansion and contraction of the two lifting hydraulic cylinders, different The amount of expansion and contraction will cause the attitude error of the segment and even the deformation of the lifting mechanism; and the effective area of ​​the rod cavity and the rodless cavity of the lifting hydraulic cylinder are different, resulting in a large difference in the telescopic control performance of the lifting hydraulic cylinder, and the extension speed of the hydraulic cylinder is low Due to the retraction speed, the assembly speed is reduced

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