A two-stage telescopic roadheader combined cutter head with adjustable opening ratio

Abstract

The invention discloses a two-stage telescopic heading machine combined cutterhead with an adjustable open rate. The two-stage telescopic heading machine combined cutterhead comprises a first-stage cutterhead assembly, a second-stage cutterhead assembly and a driving device, wherein the first-stage cutterhead assembly and the second-stage cutterhead assembly are provided with axial propelling devices. Each stage of cutterhead assembly comprises a cutterhead body and a cutterhead center plate disc, a plurality of slag discharging holes are formed in each of the disc faces of the first-stage cutterhead body and the second-stage cutterhead body, the first-stage cutterhead center plate disc and the second-stage cutterhead center plate disc are provided with a plurality of center plates arranged in a radiation shape, and the number of the center plates and the number of the slag discharging holes are equal in each cutterhead assembly. Different heading modes of combined cutters and the open rate of each stage of cutterhead assembly can be controlled through the coordinative action of the corresponding axial propelling device and the driving device. When the combined cutterhead works, all the stages of cutterhead bodies bear small loads, the strength and rigidity of the structure and the distribution balance of loads are improved, and thus it is avoided that the cutterhead deforms due to excessive large stress and nonuniform stress. The adaptive heading capability of the cutterhead is improved, and the heading safety and heading efficiency are improved.

Description

technical field [0001] The invention relates to excavation equipment for excavating underground tunnels, and belongs to the technical field of tunnel machinery. More specifically, it involves the ability to improve the adaptability of large-diameter roadheaders under complex geology, aiming to easily carry out excavation configuration of secondary cutterheads on two-stage independent retractable cutterheads and cutterheads of all levels according to different geological conditions. A two-stage cutterhead structure that can independently adjust the opening ratio to achieve geological adaptability. Background technique [0002] The shield method is one of the tunnel excavation methods, and the cutter head is an important part of the shield machine. Domestic research on shield cutterheads focuses on the analysis of overall cutterhead opening ratio, cutterhead force analysis, cutter layout, influence of complex geology on shield tunneling, cutterhead tool life analysis, etc., a...

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Problems solved by technology

[0006] The purpose of the patent of the invention is to overcome the traditional shield machine, especially the position and opening ratio of the cutter head of the large-diameter shield machine are fixed, to deal with complex geology, the radial unbalanced force of the cutter head, the overturning moment is large, Due to the shortcomings of large cutterhead deformation and poor geological adaptability, a two-stage telescopic roadheader combined cutterhead with adjustable opening ratio is provided.

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