Control method and control device for rotary drilling rig and its pressurized oil cylinder
A pressurized oil cylinder and rotary drilling rig technology, which is applied to fluid pressure actuators, hoisting devices, mechanical equipment, etc., can solve the problems of damaged brakes and the inability to accurately know the exact state of hoisting brakes, etc.
Active Publication Date: 2015-11-18
SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO +1
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Problems solved by technology
In the process of controlling the drilling of the drill pipe, it is necessary to pressurize the power head through the pressurized oil cylinder. This process is manually controlled by the operator, and the opening or closing of the winch brake is controlled by the pressure of the oil circuit inside the main winch. To automatically control the opening or closing, the operator cannot accurately know the exact state of the winch brake during the process of controlling the pressure of the pressurized cylinder. Therefore, if the winch brake is not opened, the pressurized cylinder will be forcibly pressurized. condition, thereby damaging the brake
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[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0028] In the present invention, unless stated to the contrary, the directional words used are to be understood according to the direction in practical application or combined with the conventional meaning and the meaning in the context of the text.
[0029] The present invention provides a control method for a pressurized oil cylinder 11 of a rotary drilling rig. The rotary drilling rig includes a reducer 12, an oil pump 13 and a control module. The oil pump 13 is connected to the pressurized oil cylinder 11 to supply the pressurized oil cylinder to the pressurized oil cylinder 11. 11. Oil supply, the control module is used to control the conduction and cut-off of the o...
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The invention discloses a control method of a pressurizing oil cylinder of a rotary drilling rig. The control method includes the steps that the pressure of a braking opening of a speed reducer is detected; when the pressure is larger than a preset pressure threshold value, a control module is started so that communication between the pressurizing oil cylinder and an oil pump through an oil path can be started or stopped according to a control signal of the pressurizing oil cylinder; when the pressure is smaller than or equal to the preset pressure threshold value, the control module is stopped so that the oil path between the pressurizing oil cylinder and the oil pump can be kept stopped without control of the control signal of the pressurizing oil cylinder. The invention further discloses a control device and the rotary drilling rig. According to the technical scheme, the state of a winching brake is detected directly, the pressurizing oil cylinder can be operated only when the winching brake is started, otherwise, the pressurizing oil cylinder can not be driven, so that the situation that the winching brake is damaged because the pressurizing oil cylinder carries out pressurization forcibly under a braking state is avoided, damage to the winching brake under misoperation conditions is avoided, the winching brake is protected, and the service life of the winching brake is prolonged.
Description
technical field [0001] The invention relates to construction machinery, in particular to a control method, a control device and a rotary drilling rig of a pressurized oil cylinder of a rotary drilling rig. Background technique [0002] In the rotary drilling rig, the hoisting mechanism is usually used to control the work of the drill pipe, that is, the lifting and lowering of the drill pipe are controlled by the main winch. During the working process of the main hoist, the hydraulic pump outputs high-pressure oil to drive the main hoist motor, and at the same time, the oil circuit and hoist brake of the main hoist motor are opened, and the torque is increased by the deceleration of the reducer, and the reel is driven to rotate to lift or Lower the main winch. In the process of controlling the drilling of the drill pipe, the power head needs to be pressurized by the pressurizing oil cylinder. This process is manually controlled by the operator, and the opening or closing of ...
Claims
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IPC IPC(8): F15B11/028F15B15/14B66D5/00
Inventor 何杰黄伟民
Owner SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO