Dual-fluid synchronous slip casting and cleaning switching mechanism

Abstract

The invention discloses a dual-liquid synchronous slurry injecting, cleaning and switching device, which comprises a slurry injection main pipeline, an outlet pipe, a switching valve core, a cleaning oil cylinder and a cleaning water pipe, wherein the slurry injection main pipeline comprises a mixing pipe used for supplying dual-slurry liquid and a plurality of slurry pipes which are connected with the mixing pipe; the heads and the tails of the slurry pipes are linked in sequence; the outlet pipe is an outlet of the slurry liquid, and the pipe wall is provided with through holes; the through holes are communicated with the outlet ends of the slurry pipes; the switching valve core is arranged in the pipe cavity of the outlet pipe in a way of sliding fit, and the pipe wall is provided with a plurality of water discharging holes; the water discharging holes can be blocked or communicated with the through holes of the outlet pipe through the axial slide of the switching valve core; the cleaning oil cylinder is connected with the switching valve core and drives the switching valve core to slide in the pipe cavity of the outlet pipe; and the cleaning water pipe is communicated with the water discharging holes of the switching valve core finally. The device realizes the automatic mixture of dual-slurry liquid, avoids the situation that the slurry liquid is solidified and blocks the pipelines, and can realize automatic switch to automatically clean the pipelines. The device is applicable to synchronous slurry injection construction in the shield method.

Description

Technical field: [0001] The invention relates to equipment for shield tunnel construction, in particular to a double-fluid synchronous grouting cleaning switching device belonging to the field of tunnel construction machinery. Background technique: [0002] With the development of urban construction, subways and underground piping projects are increasing, and tunnel shield excavation has gradually become the main means of urban underground construction by virtue of its own advantages. When the shield tail is separated from the segments during the propulsion of the shield, an over-excavated gap will appear on the back of the segment. If the gap is not backfilled in time, the formation will be deformed, which will have a destructive effect on the adjacent underground structures: such as building The foundation of the building is tilted and cracked, various underground pipelines are cracked or broken, the surface of the road collapses, and the traffic is interrupted. Usually, ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies and defects of the synchronous grouting and cleaning switching device in the existing shield machine, and provide a double-fluid synchron...

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