High-pressure hydraulic-assisted tunneling cutter disc for soil pressure balance shield machine

Abstract

The invention discloses a high-pressure hydraulic-assisted tunneling cutter disc for a soil pressure balance shield machine. The high-pressure hydraulic-assisted tunneling cutter disc comprises a shield machine cutter disc body, a plurality of high-pressure hydraulic spraying nozzles are arranged on a disc working surface, the diameters of the high-pressure hydraulic spraying nozzles are 0.3mm-1.0mm, the water jet pressure of high-pressure water is 1.5-2.0 times of a rock saturation compressive strength value, the linear velocity of the high-pressure hydraulic spraying nozzles rotating along with the cutter disc in work is 0.2-1.0 m / s, and the water jet speed of the high-pressure hydraulic spraying nozzles is 400-1000 m / s; a water supply rotating joint for communicating with an external water source and a high-pressure hydraulic spraying nozzle fixing frame are arranged on the back surface of the cutter disc, and the water supply rotating joint is located in the rotating center of thecutter disc; the rotating joint communicates with a high-pressure water generating device through a high-pressure pipeline, and the high-pressure water generating device is arranged on a follow-up device of the shield machine, and is composed of a filter, an additional plug piston pump, a voltage stabilizer, a power motor and a control system. The high-pressure hydraulic-assisted tunneling cutterdisc has the advantage that the rock breaking capacity on boulders of the cutter disc of the soil pressure balance shield machine is effectively improved.

Description

technical field [0001] The invention relates to a shield machine cutterhead, in particular to a tunneling cutterhead for an earth pressure balance shield machine. Background technique [0002] At present, the shield machine has been widely and maturely used in water conservancy, municipal, transportation and other projects. In the soil layer where the groundwater is not rich, the earth pressure balance shield machine is the first choice. [0003] Traditional earth pressure balance shield machine cutter head such as Figure 5 , consisting of a cutter head 1.1, a plurality of disc-shaped hobs 2.1 arranged on the working surface of the cutter head 1.1, and a plurality of slag collecting ports 3.1 evenly distributed on the edge of the working face of the cutter head 1.1; the earth pressure balance shield machine When working, under the action of the thrust cylinder and the drive motor, the front cutterhead 1.1 rotates to cut the soil, and the cut soil pours into the soil cabin t...

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Problems solved by technology

Such processing methods have disadvantages such as long construction period, high cost, and poor safety.

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