Tower crane anti-power protection device
A power-off protection device and tower crane technology, which is applied to cranes and other directions, can solve problems such as fragile safety hazards and safety accidents, and achieve the effects of ensuring tower crane safety, ensuring construction safety, and eliminating safety hazards
Active Publication Date: 2017-07-11
SHANGHAI CONSTR NO 5 GRP CO LTD
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Problems solved by technology
[0005] Aiming at the problem that the existing tower cranes are easy to cause safety accidents due to sudden power failure, and the use of batteries for continuous power supply has potential safety hazards that are easily damaged
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[0012] The tower crane anti-power outage protection device proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0013] The core idea of the present invention is to use the electric push rod to push and retract the brake friction plate of the brake, so as to brake the rotation of the tower crane. Since the push rod moves when the electric push rod is powered on, the push rod will remain at the original position when the power is off. If there is a position, the battery does not need to continue to supply power after the tower crane slews and brakes, thus avoid...
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The invention provides a power-off preventing protection device for a tower crane, and relates to the technical field of control of hoisting machinery of building construction. The invention aims to solve the problems that sudden power off of a conventional tower crane easily results in a safety accident, and when an accumulator is used for continuous electricity supply, a potential safety hazard that the accumulator is easy to damage is generated. The power-off preventing protection device comprises a brake, a pinion, a rotary girth gear, an electric push rod and a rotary control system, wherein the brake and the pinion are arranged on a rotary motor; the rotary girth gear is meshed with the pinion; the rotary control system is electrically connected with the electric push rod and comprises an AC-DC switching circuit, an AC contactor, a rotary control circuit, a voltage detecting circuit, and an alarm circuit, wherein the AC-DC switching circuit and the AC contactor are respectively connected to an AC electric source in series; the rotary control circuit and the voltage detecting circuit are respectively connected with the AC-DC switching circuit; the alarm circuit is separately connected with the AC-DC switching circuit and the AC electric source; a control switch of the rotary control circuit controls the pushing out and the recovering of the electric push rod, and the brake is used for achieving the purpose of braking and releasing the rotation of the tower crane, so that the potential safety hazard is further eliminated, and the construction safety is guaranteed.
Description
technical field [0001] The invention relates to the technical field of building construction hoisting machinery control, in particular to a tower crane anti-power-off protection device. Background technique [0002] Tower cranes (hereinafter referred to as tower cranes) are indispensable equipment for modern industrial production, and are widely used in lifting, transportation, loading and unloading, installation and other operations of various materials. [0003] During the construction process of the tower crane, there will be occasional unfavorable situations of sudden power failure or tripping, and the original slewing brake of the tower crane will also be unable to brake in time due to power failure. At this time, due to inertia or strong wind blowing The movement will continue to rotate without being controlled by the driver. If there is material hanging on the hook, the material will also rotate accordingly. Casualties of construction workers below. Therefore, safet...
Claims
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IPC IPC(8): B66C23/94
CPCB66C23/94
Inventor 朱振贤崔一舟王伟
Owner SHANGHAI CONSTR NO 5 GRP CO LTD