Control method for anti-slip hook protection of hoisting mechanism of cable machine and cable machine
A technology of lifting mechanism and control method, which is applied in the direction of cable crane, hoist, transportation and packaging, etc., and can solve problems such as equipment safety and adverse impact on project progress, potential safety hazards, uncontrolled falling of hooks and heavy objects, etc.
Active Publication Date: 2021-09-28
杭州国电大力机电工程有限公司
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Problems solved by technology
[0003] The safety of the cable machine operation is the most important issue. Among them, the hook failure of the hoisting mechanism (when the motor of the hoisting mechanism is stopped, the brake fails to lock the brake normally, causing the hook and heavy objects dragged by the hoisting mechanism Falling out of control, known as slip hook) is always a safety hazard, and failure to solve this problem will have an extremely adverse impact on equipment safety and project progress
The usual design is that the working brake is opened and closed according to the operation command of the mechanism. In case of an emergency (including the slip hook), the operator presses the emergency stop button to stop, and quickly closes the working brake and the safety brake at the same time. This operation relies on manual response.
Method used
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[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] like figure 1 As shown, a control method for the anti-slip hook protection of the hoisting mechanism of the cable machine, including:
[0029] When the running signal stops, the first preset time is delayed, and the working brake is unconditionally used for braking;
[0030] When the running signal stops and the speed of the hoisting motor of the hoisting mechanism is lower than the first preset speed value, the hoisting motor of the hoisting mechanism is allowed to run for a second preset time, and if the brake permission signal is still powered, it will continue After the end of the second preset time, the working brake and the safety brake are put into use for braking;
[0031] If it is detected that the brake is not clamped quickly after the working brake is de-energized, the safety brake will be used for braking after a delay of...
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The invention discloses a control method for anti-slip hook protection of a hoisting mechanism of a cable machine and a cable machine. When the running signal stops, the first preset time is delayed, and the working brake is unconditionally put into braking; when the running signal stops and the When the speed of the hoisting motor of the hoisting mechanism is lower than the first preset speed value, the hoisting motor of the hoisting mechanism is allowed to run for a second preset time, and after the second preset time is over, the working brake and the safety brake are put into operation. Braking; if it is detected that the working brake is powered off and the holding brake is not clamped quickly, the safety brake will be used for braking after a delay of the third preset time; if it is detected that the working brake is powered off and the holding brake is quickly clamped, but When the speed of the hoisting motor of the hoisting mechanism is greater than the second preset speed, the safety brake is put into use for braking after a delay of the fourth preset time. The invention is beneficial in that it can effectively prevent the hook from slipping.
Description
technical field [0001] The invention relates to a cable crane, in particular to a control method for protecting a hoisting mechanism of a cable crane from slipping hooks in the field of electric control of a cable crane. Background technique [0002] Cable cranes, also known as cable cranes, are mainly used in the construction of hydropower dams. [0003] The safety of the cable machine operation is the most important issue. Among them, the hook failure of the hoisting mechanism (when the motor of the hoisting mechanism is stopped, the brake fails to lock the brake normally, causing the hook and heavy objects dragged by the hoisting mechanism Falling out of control, known as slip hook) is always a potential safety hazard, and failure to solve this problem will have an extremely adverse impact on equipment safety and project progress. The usual design is that the working brake is opened and closed according to the operation command of the mechanism. In case of emergency (inc...
Claims
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IPC IPC(8): B66C21/00B66C15/00B66C13/16B66C13/48B66D5/32B66D5/30
CPCB66C21/00B66C15/00B66C13/16B66C13/48B66D5/32B66D5/30B66D2700/03B66C2700/084Y02E10/72
Inventor 洪诚李明枝
Owner 杭州国电大力机电工程有限公司