Construction hoist overload protection system and method
A technology for construction lifts and overload protection, applied in lifts, transportation and packaging, etc., can solve the problems of large judgment errors and high overload protection costs, and achieve the effect of accurate judgment
Active Publication Date: 2015-12-02
SUZHOU INOVANCE CONTROL TECH CO LTD
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a construction hoist overload protection system and method for the above-mentioned problems of high overload protection cost of construction hoist, operation after dismantling, and large judgment error
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] Such as figure 1 As shown, it is a schematic diagram of an embodiment of an overload protection system for a construction hoist according to the present invention. The construction hoist is driven by a motor controlled by a frequency converter. The overload protection system in this embodiment includes a curve creation unit 11, an analog quantity acquisition unit 12, a load calculation unit 13 and an overload judgment unit 14, wherein the above-mentioned curve creation unit 11, the analog quantity acquisition unit 12, the load calculation unit 13 and The overload judging unit 14 can be impl...
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The invention provides an overload protection system for a construction lift. The construction lift is driven by a motor to run, the motor is controlled by a frequency converter, and the overload protection system comprises a curve creating unit, an analog quantity acquiring unit, a load capacity computing unit and an overload judging unit; the curve creating unit is used for creating an analog quantity signal and load capacity curve by means of weighing self-learning at a debugging state; the analog quantity acquiring unit is used for acquiring a current analog quantity signal from a weighing sensor; the load capacity computing unit is used for computing current load capacity corresponding to the current analog quantity signal by the aid of the analog quantity signal and load capacity curve; the overload judging unit is used for confirming an overload state of the construction lift when the certain current load capacity exceeds rated load capacity. The invention further provides an overload protection method for the construction lift. The overload protection system and the overload protection method have the advantages that the analog quantity signal and load capacity curve is created by means of weighing self-learning, and accordingly whether the construction lift is in the overload state or not can be accurately judged according to the load capacity computed according to the curve.
Description
technical field [0001] The invention relates to the field of construction elevator control, and more specifically, to an overload protection system and method for a construction elevator. Background technique [0002] Construction hoists are widely used in various infrastructure industries and are one of the most frequently used construction machines for carrying people and goods in construction. The construction hoist is usually used with the tower crane on the construction site, which mainly controls the up and down operation and docking of the cage through the electrical control system. [0003] During the construction process, when the cage is overloaded, it will cause the steel wire rope and the drum to slip, the brake will fail, or even the wire rope will be torn, and the cage will fall, resulting in equipment damage, casualties, and serious safety accidents. In order to ensure construction safety, the current construction elevator industry at home and abroad requires...
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IPC IPC(8): B66B5/14
Inventor 殷杰邱志红
Owner SUZHOU INOVANCE CONTROL TECH CO LTD