Slurry shielding ordinary-pressure tool changer

Abstract

The invention discloses a slurry shielding ordinary-pressure tool changer and relates to the technical field of slurry shielding tunneling machines. The slurry shielding ordinary-pressure tool changercomprises a double-hobbing-cutter device, a hobbing cutter inner cutter roller, a double-opening gate device, a flushing high-pressure valve, a pressure-relief high-pressure valve, a double-opening gate hydraulic oil cylinder, a drawing oil cylinder, a cutter roller back cover and a guiding ring, wherein the double-hobbing-cutter device is arranged on a cutter roller mounting base and is arrangedin the hobbing cutter inner cutter roller through a wedge block, and the double-hobbing-cutter device is fixedly connected with the hobbing cutter inner cutter roller through a hexagonal screw. By designing an oil filling device, the slurry shielding ordinary-pressure tool changer can achieve a double-gate sealing face and quickly form oil film, assists sealing, also assists decrease of an opening thrust of a double-opening gate and better assists power consumption reduction of the oil cylinder. In addition, by designing the flushing high-pressure valve and the pressure-relief high-pressure valve on an outer cutter roller, cutter changing safety is achieved, and stuck blockage of the hobbing cutter inner cutter roller is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of muddy water shield tunneling machines, in particular to a device for replacing the cutting and excavating cutter at the front end of the cutter head under normal pressure, in particular to a muddy water shield normal pressure tool changing device. Background technique [0002] In the excavation projects of river-crossing, river-crossing and sea-crossing tunnels with complex terrain and deep buried depth, the mud-water shield construction demonstrates the advantages of the mud-water balance scheme. With the advancement of the project progress, the tool wear at the front end of the construction shield is serious and cannot meet the requirements of excavation. At this time, it is necessary to manually enter the muddy water pressure chamber with a pressure of 0.8~1.0MPa to work. This kind of environment is harsh and the safety factor is low. low efficiency. Second, although there are two mud gate valves conn...

AI Technical Summary

Problems solved by technology

With the advancement of the project progress, the tool wear at the front end of the construction shield is serious and cannot meet the requirements of excavation. At this time, it is necessary to manually enter the muddy water pressure chamber with a pressure of 0.8~1.0MPa to work. This kind of environment is harsh and the safety factor is low. low efficiency

Second, although there are two mud gate valves connected in parallel to realize tool change at this stage, this scheme only realizes small-diameter opening tool change for scrapers, and cannot meet the replacement of other tools such as large-diameter and large-opening hobs.

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