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Double brake electric hoist fault emergency load safe release system and method

An electric hoist and safety release technology, applied in hoisting devices, spring mechanisms, etc., can solve the problems of potential safety hazards, no safety protection, failure of the first brake, etc., achieve safe and controllable speed, and ensure ease of use Effect

Active Publication Date: 2018-12-11
中国人民解放军火箭军工程大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the premise of the application of this device is that the first brake fails, and during the operation, the process of lowering the heavy object is controlled by human operation, and there is no safety protection, which has potential safety hazards

Method used

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  • Double brake electric hoist fault emergency load safe release system and method
  • Double brake electric hoist fault emergency load safe release system and method
  • Double brake electric hoist fault emergency load safe release system and method

Examples

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Embodiment Construction

[0039] Typical examples of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] like figure 1 As shown, the present invention provides a dual-brake electric hoist emergency load safety release system, including an emergency power supply box 1, a cone motor brake manual operating mechanism 2, a rotational speed measurement sensor device 3 and an overspeed control device 4.

[0041]When working, the second brake is first controlled to be opened through the power supply of the emergency power supply box 1, and then the first brake is gradually opened by manually operating the conical brake operating mechanism 2, so that the weight is slowly lowered, and the speed measuring sensor device 3 installed on the reel is at the same time Measure the lowering speed of the heavy object; when the lowering speed of the heavy object is close to the set value, an audible and visual alarm will be given through the overspeed control devi...

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Abstract

The invention discloses a double brake electric hoist fault emergency load safe release system and method. The double brake electric hoist fault emergency load safe release system and method are usedfor achieving the effect that the hoisting load is controllable and can be released safely on the conditions that an electrical fault or a power grid power failure occurs on a double brake electric hoist crane. When an electrical fault or a power grid power failure occurs on the double brake electric hoist crane, an emergency power box is used for achieving device independent self power supply, asecond brake is controlled to be turned on at first, and then a conical motor is used for braking a manual operation mechanism to enable weight to slowly descend; a speed measuring device measures thedescending speed of the weight; when the descending speed of the weight is close to a set value, a sound-light alarm is given through an overspeed control box, and the conical motor is reversely controlled to brake the manual operation mechanism; once the descending speed of the weight exceeds the set value, power-off control is carried out on the second brake through an overspeed control device,load descending is stopped, and it is ensured that the emergency descending process is safe.

Description

technical field [0001] The invention belongs to the technical field of hoisting machinery, and in particular relates to a double-brake electric hoist emergency load safety release system and method, which are suitable for realizing controllable and safe release of hoisting loads in the event of a crane electrical failure or a power grid failure. Background technique [0002] The lifting mechanism of the electric hoist crane for hoisting special equipment is equipped with two sets of brakes. The first brake is a conical motor brake. Its action principle is that the inner surface of the stator and the outer surface of the rotor are both conical. In addition to rotating, the shaft also moves axially. The stator and rotor core generates axial magnetic tension to move the rotor axially and compress the spring, so that the fan brake wheel is separated from the brake seat (back cover or end cover). The axial magnetic tension compresses the brake spring, and causes the brake wheel t...

Claims

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Application Information

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IPC IPC(8): B66D1/28B66D1/54
CPCB66D1/28B66D1/54
Inventor 马长林于传强李锋郝琳程洪杰高运广郭杨李良曹大志
Owner 中国人民解放军火箭军工程大学
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