Slurry mixing device of slurry shield

Abstract

The invention discloses a slurry mixing device of a slurry shield. The slurry mixing device comprises a bentonite bin, a vertical type foam pump and a slurry mixing tank, wherein a discharge hole of the bentonite bin is connected to the top end of the vertical type foam pump; a pneumatic knife gate valve and a flow meter are sequentially connected on a water inlet tube at the top end of the vertical type foam pump; a discharge tube at the lower end of the vertical type foam pump is connected to the top end of the slurry mixing tank; a shearing pump and a non-return valve are sequentially mounted on the discharge tube of the vertical type foam pump; an ultrasonic level gauge is mounted at the top end of the slurry mixing tank; and a manual knife gate valve, a centrifugal pump and a non-return valve are sequentially mounted on the discharge tube at the lower end of the side wall of the slurry mixing tank. The slurry mixing device can prepare novel slurry once, so that slurrying time is greatly shortened, the novel slurry can be quickly prepared, equipment cost and floor space are saved, the trend that floor space for shield construction becomes smaller and smaller is met, design is simple, and mounting is convenient.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a mud-water shield mud preparation device. Background technique [0002] At present, the main mixing materials of domestic shield muddy water are bentonite, carboxymethyl cellulose and so on. The mud preparation system usually consists of a new slurry tank, a new slurry pump, a new slurry agitator, a new slurry storage tank, a chemical agent adding system, water adding equipment, and pumps, valves and pipeline connections. The chemical agent adding system pumps the chemical agent into the slurry mixing tank, and the slurry mixing tank stirs bentonite and other materials together to make fresh slurry and send it to the pre-expansion tank for pre-expansion. [0003] This traditional pulping method cannot quickly make new pulp, and needs to be continuously stirred with a new pulp agitator on the new pulp tank, so the pulping speed is slow and the efficiency is low. In a...

AI Technical Summary

Problems solved by technology

[0003] This traditional pulping method cannot make new pulp quickly, and needs to be continuously stirred with a new pulp agitator on the new pulp tank, so the pulping speed is slow and the efficiency is low

In addition, the prepared bentonite slurry must be sent into the expansion tank, which cannot meet the smaller and smaller requirements of the current shield construction.

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