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CN-121974232-A - Lifting hook control method and lifting device

CN121974232ACN 121974232 ACN121974232 ACN 121974232ACN-121974232-A

Abstract

The application discloses a control method of a lifting hook and a lifting device, before the lifting hook is lowered, whether the pulling force of the lifting hook on the pull rope is larger than the dead weight of the pull rope or not is judged. When the pulling force of the lifting hook to the pull rope is not greater than the dead weight of the pull rope, the lifting hook cannot be lowered by the dead weight, at the moment, the friction wheel winch is controlled to drive the friction wheel set to release the pull rope, and meanwhile, the winch is controlled to release the pull rope, so that the load of the pull rope between the winch and the friction wheel winch acts on the friction wheel winch, the load transmitted to the rope outlet end of the friction wheel set after passing through the friction wheel set is attenuated, the dead weight of the pull rope between the friction wheel set and the lifting hook is smaller than the pulling force of the lifting hook to the pull rope, the lifting hook can pull the pull rope by the dead weight, and the winch releases the pull rope according to the preset speed, so that the lifting hook is lowered.

Inventors

  • LI CHANGBIN
  • CHENG RUI
  • SUN KAI
  • ZHANG FENG
  • LIU HAIBIAO

Assignees

  • 远景能源有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (15)

  1. 1. A method of controlling a hook, comprising: Before the hanging hook is released, judging whether the pulling force of the hanging hook on the pull rope is larger than the dead weight of the pull rope or not; if yes, controlling a winch to release the pull rope according to a preset speed so as to lower the lifting hook; If not, controlling the friction wheel winch to drive the friction wheel set to release the pull rope, and controlling the winch to release the pull rope according to a preset speed so as to lower the lifting hook.
  2. 2. The method for controlling a hook according to claim 1, wherein the determining whether the pull force of the hook on the pull rope is greater than the dead weight of the pull rope comprises: and judging whether the pulling force of the lifting hook on the pull rope is larger than the dead weight of the part of the pull rope between the winch and the first pulley block at the top of the suspension arm.
  3. 3. The method for controlling a lifting hook according to claim 2, wherein the determining whether the pulling force of the lifting hook on the pull rope is greater than the dead weight of the portion of the pull rope located between the winch and the first pulley block at the top of the lifting arm is specifically: judging whether the sum of the dead weight of the part of the pull rope between the lifting hook and the first pulley block and the pulling force of the lifting hook on the pull rope is larger than the dead weight of the part of the pull rope between the winch and the first pulley block at the top of the suspension arm.
  4. 4. The method of claim 1, further comprising controlling disconnection between the friction wheel winch and the friction wheel set if it is determined that the pulling force of the hook on the pulling rope is greater than the dead weight of the pulling rope.
  5. 5. The method of claim 1, further comprising controlling the friction wheel winch to be in driving connection with the friction wheel set before controlling the friction wheel winch to drive the friction wheel set to release the pull rope if the pull force of the hook on the pull rope is not greater than the dead weight of the pull rope.
  6. 6. The method of claim 1 or 5, further comprising connecting the friction wheel winch and the friction wheel set using a torque limiter before controlling the friction wheel winch to drive the friction wheel set to release the pull cord.
  7. 7. The method of controlling a hook according to claim 1, further comprising: before lifting the lifting hook, judging whether the pulling force of the lifting hook on the pull rope is larger than the dead weight of the pull rope or not; if yes, controlling the winch to wind the pull rope according to a preset speed so as to lift the lifting hook; If not, controlling the friction wheel winch to drive the friction wheel set to wind the pull rope, and controlling the winch to wind the pull rope according to a preset speed so as to lift the lifting hook.
  8. 8. The method of claim 7, further comprising controlling disconnection between the friction wheel winch and the friction wheel set if it is determined that the pulling force of the hook on the pulling rope is greater than the dead weight of the pulling rope.
  9. 9. The method of claim 7, further comprising controlling the friction wheel winch to be in driving connection with the friction wheel before controlling the friction wheel winch to drive the friction wheel set to wind the pull rope if the pull force of the hook on the pull rope is determined to be not greater than the dead weight of the pull rope.
  10. 10. A lifting device, which comprises a lifting device, a lifting frame and a lifting frame, characterized by comprising the following steps: A lifting hook; The top of the suspension arm is provided with a first pulley block; the winch is arranged at the bottom of the suspension arm; the friction wheel winch is arranged at the top of the suspension arm; the friction wheel set is arranged at the top of the suspension arm and is in transmission connection with the friction wheel winch; One end of the pull rope is fixedly connected with the winch, the pull rope extends upwards along the suspension arm, is sequentially wound on the friction wheel set and the first pulley block, is slidably connected with the lifting hook, and the other end of the pull rope extends from the lifting hook to the top of the suspension arm and is fixedly connected with the suspension arm; When the pulling force of the lifting hook on the pull rope is not greater than the dead weight of the pull rope, the friction wheel winch drives the friction wheel to wind the pull rope, and the winch releases the pull rope to release the lifting hook.
  11. 11. The lifting device of claim 10, wherein the friction wheel set comprises a first friction wheel and a second friction wheel, wherein an axis of the first friction wheel and an axis of the second friction wheel are parallel, wherein the first friction wheel and the second friction wheel are radially spaced apart, and wherein the pull cord is wound around an outer circumferential side of both the first friction wheel and the second friction wheel.
  12. 12. The lifting device of claim 11, wherein the first friction wheel and the second friction wheel are each provided with a plurality of wire slots, the pull cord being wound in the wire slots of the first friction wheel and the second friction wheel.
  13. 13. The lifting device of claim 10, wherein the friction wheel set comprises a first friction wheel provided with helically extending wire grooves, the pull cord being wound in the wire grooves of the first friction wheel.
  14. 14. The lifting device of any one of claims 10-13, further comprising a torque limiter, the friction wheel winch and the friction wheel set being drivingly connected by the torque limiter.
  15. 15. The lifting device of any one of claims 10-13, wherein the pull of the hook on the pull rope is greater than the dead weight of the portion of the pull rope between the friction wheel set and the first pulley block.

Description

Lifting hook control method and lifting device Technical Field The application relates to the technical field of lifting, in particular to a lifting hook control method and a lifting device. Background In many overhead working scenarios, the lifting device is a necessary tool, which winds or releases the pull rope through the winch to lift or lower the hook, so that the weight can be lifted or lowered by means of the hook. Currently, the hoisting machine of the hoisting device is placed substantially at the ground (e.g. the ground), which facilitates the positioning of the hoisting device. However, as the working height increases, the length of the rope is increased, and the weight of the rope is increased, and in this case, the pulling force of the hook on the rope is required to be greater than the weight of the rope. In overhead operation, steel wire ropes are generally used for lifting in view of safety. When the operation height exceeds 100 meters, the dead weight of the steel wire rope can reach hundreds of kilograms, if the pulley block of the lifting hook is multiple, the dead weight of the lifting hook can be as high as several tons, and the lowering of the lifting hook can be realized, so that the lifting hook is extremely difficult to realize in actual operation, and the lifting hook has no reasonable economic benefit. Disclosure of Invention The application aims to provide a control method and a lifting device for a lifting hook, which can enable a smaller lifting hook to automatically lower by utilizing the self weight in high-altitude operation. In order to solve the above technical problems, a first aspect of the present application provides a method for controlling a hook, including: Before the hanging hook is released, judging whether the pulling force of the hanging hook on the pull rope is larger than the dead weight of the pull rope or not; if yes, controlling a winch to release the pull rope according to a preset speed so as to lower the lifting hook; If not, controlling the friction wheel winch to drive the friction wheel set to release the pull rope, and controlling the winch to release the pull rope according to a preset speed so as to lower the lifting hook. According to the control method of the lifting hook, before the lifting hook is lowered, whether the pulling force of the lifting hook on the pull rope is larger than the dead weight of the pull rope is judged. When the pulling force of the lifting hook to the pull rope is not greater than the dead weight of the pull rope, the lifting hook cannot realize the lowering by the dead weight, the friction wheel winch is controlled to drive the friction wheel set to release the pull rope, and the winch is controlled to release the pull rope according to the preset speed. Like this, can make the load of stay cord between hoist engine and the friction pulley winch act on the friction pulley winch, and the stay cord twines behind the friction wheelset, and the load of the play rope end of transmission to the friction wheelset can produce the decay for the stay cord dead weight between friction wheelset and the lifting hook is less than the pulling force of lifting hook to the stay cord, thereby makes the lifting hook can rely on dead weight pulling stay cord, and the hoist engine releases the stay cord according to predetermineeing speed, and then realizes that the lifting hook descends. In other words, the load of the pull rope is attenuated by using the friction wheel winch and the friction wheel group, so that the action of the pull rope end on the lifting hook is reduced, and the smaller lifting hook can be automatically lowered in high-altitude operation. Optionally, the determining whether the pulling force of the hook on the pull rope is greater than the dead weight of the pull rope specifically includes: and judging whether the pulling force of the lifting hook on the pull rope is larger than the dead weight of the part of the pull rope between the winch and the first pulley block at the top of the suspension arm. Optionally, the judging whether the pulling force of the lifting hook to the pull rope is greater than the dead weight of the part of the pull rope between the winch and the first pulley block at the top of the suspension arm, specifically is: judging whether the sum of the dead weight of the part of the pull rope between the lifting hook and the first pulley block and the pulling force of the lifting hook on the pull rope is larger than the dead weight of the part of the pull rope between the winch and the first pulley block at the top of the suspension arm. Optionally, if the pull force of the lifting hook on the pull rope is larger than the dead weight of the pull rope, the method further comprises the step of controlling disconnection between the friction wheel winch and the friction wheel set. Optionally, if it is determined that the pulling force of the hook on the pull rope is not greater than the dead weight of t