Piston mechanism and spherical tooth hob with water jet assisted rock breaking function

A piston mechanism and water jet technology, applied in mining equipment, earthwork drilling, tunnels, etc., can solve problems such as the large distance between the impact point and the hob, very high valve reliability requirements, and unsatisfactory combined rock breaking effect , to achieve the effect of reducing tool wear, saving operation and maintenance costs, and improving rock breaking efficiency

CN113446017AActive Publication Date: 2021-09-28HUNAN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-09-28

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Abstract

The invention discloses a piston mechanism and a spherical tooth hob with a water jet assisted rock breaking function. The piston mechanism comprises a piston cylinder, a piston and an elastic piece, the piston cylinder is of a hollow tubular structure, a sealing partition plate is arranged in the piston cylinder, and the interior of the piston cylinder is vertically divided into a movable cavity and a pressure cavity through the sealing partition plate; the piston penetrates through the sealing partition plate and is movably arranged in the piston cylinder, a limiting block is arranged at the end, protruding out of the pressure cavity, of the piston, the limiting block seals an opening of the pressure cavity in the natural state, and a piston probe is arranged at the position, located in the movable cavity, of the piston; and the elastic piece is arranged below the piston and abuts against the limiting block, and the piston probe always protrudes out of the opening of the movable cavity in the natural state under the action of the elastic piece. By means of the piston mechanism and the spherical tooth hob, water jet can be ejected from the peripheries of arranged spherical teeth, starting and stopping of the water jet are controlled through a pure mechanical structure, the reliability is high, abrasion of the spherical tooth hob can be reduced, and the rock breaking efficiency is improved.
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Description

Technical field

[0001] The present invention relates to a rock breaking ball hob technologies, and particularly to a mechanism and a piston having a water jet assisted rock function ball hob. Background technique

[0002] Hard rock tunnel boring machine (in TBM) is a rock formation tunneling major equipment, which is the use of the hob cutter rotary cutting rock breaking extrusion. Cutters ball is used on the TBM cutter tool is based on constant cross section arranged in a circle on the hob tooth edge surface of the ball, during excavation is first pressed by a ball gear geotechnical pre-cut, and then by a subsequent rock cutting blade, often compared to the traditional rock breaking sectional hob cutter having improved rock breaking efficiency greater advantage.

[0003] With TBM requirements in the field of hydraulic engineering, underground engineering, traffic engineering and other construction projects increasingly high performance TBM also put forward higher requirements. W...

Examples

Embodiment Construction

[0030] In order to understand the technical features, objects and effects of the present invention, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it is understood that the "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", orientation or positional relationship of "top", "bottom", "inner", "outer", "head", "tail" or the like indicating a positional relationship of the orientation shown in the accompanying drawings, a specific configuration and orientation of the operation, is merely for convenience of description the present technical solution, the device or element referred to must have does not indicate a particular orientation, and can not be construed as limiting the present invention.

[0031] It will also be noted that the terms such as "Install", "Connect", "Connect", "Secure", "Set", etc., unless otherwise specified, "C...