Turnplate device and rotary drilling rig

A technology of rotary drilling rig and turntable, which is applied in the directions of rotary drilling rig, support device, rotary drilling, etc., can solve the problem of large load on bolts, and achieve the effect of reducing engineering accidents and prolonging service life.
CN102409983AInactive Publication Date: 2012-04-11BEIJING SANY HEAVY MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING SANY HEAVY MASCH CO LTD
Publication Date
2012-04-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a turnplate device and a rotary drilling rig. The turnplate device comprises a mast turnplate component, a turnplate body, a press plate and a bolt, wherein the mast turnplate component is provided with a containing groove and a seam allowance, the turnplate body is arranged in the containing groove, the press plate covers on the turnplate body and supports against the seam allowance, and the press plate is fixed on the mast turnplate component by the bolt. The press plate supports against the seam allowance so that the gravity of the mast is transmitted to a luffing mechanism only through the press plate and the turnplate body, and then the bolt connecting the press plate and the mast turnplate component is not needed to bear overlarge shearing force; therefore, the fracture risk of the bolt caused by incapability of bearing the overlarge shearing force can be reduced.
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Description

technical field

[0001] The invention relates to the field of pile machinery, in particular to a turntable device and a rotary drilling machine with the turntable device. Background technique

[0002] The existing rotary drilling rig rotary table pressure plate does not adopt limit position, because the friction force between the rotary table body and the pressure plate is very large, the two are approximately fixed to each other. In the working state of the rotary drilling rig, when the mast is erected and rotated, the pressure plate and the mast will slide relative to each other due to the gravity of the mast and the load of the power unit, so that the connecting bolts of the rotary table will bear a huge shear force. In addition, when the drilling rig is pressurized, the turntable bears a huge torque. At this time, the bolts on the outermost side of the turntable are under the greatest load, and vicious failures such as bolts being sheared often occur. Contents of the in...

Claims

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