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An elevator safety detection method based on the bending times of elevator wire rope

A technology of bending times and wire ropes, applied in elevators, transportation and packaging, etc., can solve the problems of broken wires, decreased toughness, and the inability to obtain the bending times of wire ropes.

Active Publication Date: 2020-11-03
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel wire rope is repeatedly scratched up and down through the anti-rope pulley, and the countless times of bending will easily cause the steel wire to fatigue, reduce its toughness, and eventually lead to broken wires. Fatigue broken wires often appear on the outer steel wire with the most severe bending degree.
[0004] In practical application, the staff needs to detect the steel wire rope according to the number of bending times of the steel wire rope, but the existing method uses the bending number detection device of the steel wire rope to obtain the result of the number of bending times of the steel wire rope is not accurate, and the number of bending times of the whole length of the steel wire rope cannot be obtained. Therefore, the elevator staff detects the steel wire rope according to the inaccurate bending times, resulting in low work efficiency of the staff

Method used

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  • An elevator safety detection method based on the bending times of elevator wire rope
  • An elevator safety detection method based on the bending times of elevator wire rope
  • An elevator safety detection method based on the bending times of elevator wire rope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Step 1. In each operation of the elevator, obtain the number of forward bending and the number of reverse bending at each position of the elevator based on the destination floor number information received by the elevator control panel and the basic information of the elevator.

[0119] See attached figure 2 As shown, in this embodiment, based on the basic information of the elevator, the length L1 of the wire rope wound on the traction sheave during elevator operation is obtained according to formula (a); where L1 is the first geometric tangent point 1 of the wire rope and the traction sheave. The length of the wire rope from the position to the second geometric tangent point 2 of the wire rope and the traction wheel;

[0120] Formula (a):

[0121]

[0122] Where α: represents the wrap angle between the wire rope and the traction sheave;

[0123] D1: Indicates the diameter of the traction wheel.

[0124] Obtain the wire rope length L2 between the traction sheave and the guide ...

Embodiment 2

[0179] This embodiment refers to the elevator parameters of a certain commercial building as shown in Table 1.

[0180] Table 1 The main parameters of the example elevator

[0181]

[0182] Q1: In this embodiment, the diameter of the traction wheel and the guide wheel are 400 millimeters and 380 millimeters (mm), respectively, and the wrap angle is α=150°, β=120°. The wheel center distance between the two wheels is 2 meters. Get the following length parameters:

[0183]

[0184]

[0185]

[0186] In this embodiment, it is assumed that the current elevator is in the i-th ascending process since the elevator was installed and put into use. Assuming that the initial number of floors of the elevator is 7, then a i Is 7. Assuming that the destination floor number of the elevator is 15, then b i For 15. It can be calculated that the length of the moving wire rope during the elevator ascent is ΔHi=3×|15-7|=24m, the initial number of layers corresponds to the wire rope coordinate position...

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Abstract

The invention relates to an elevator rope inspection method. The method comprises the following steps of, during each operation of an elevator, obtaining the number of forward bending times and the number of backward bending times of each position of the elevator based on the information about the number of destination floors received by an elevator control board and the basic information of the elevator; obtaining the information about the total number of bending times of each position and the information about the maximum bending position in the elevator rope during a first preset time period; and obtaining a remaining bending fatigue life value of the elevator rope according to the information about the total number of bending times and the information about the maximum bending position. The elevator rope inspection method provided by the invention can obtain the accurate number of bending times of the steel wire rope, and send out alarm signals according to the total number of bending times, so that the maintenance personnel can perform maintenance on the elevator according to the alarm signals, thereby improving the work efficiency.

Description

Technical field [0001] The invention relates to an elevator safety detection method based on the bending times of the elevator wire rope. Background technique [0002] With the development of economy and technology and the acceleration of people's work and life, the elevator as a means of transportation is also developing at high speed and super high speed. The traction wire rope is an important safety component in the elevator system. The reasonable selection, use and performance improvement of the wire rope in the elevator are very important to the economic benefits and safety of life and property of production and users. In the actual production process, the factors that affect the service life of the wire rope include the following aspects: lifting load, bending and extrusion stress when passing through the drum and pulley, and mutual friction and wear. The defects of the wire rope during use are broken wires and abrasion, which increase the stress on the wire rope, increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B7/12B66B5/00
CPCB66B5/0037B66B7/1215B66B7/1223
Inventor 贾明兴李天擎胡熙玉徐悦梅牛大鹏尤富强
Owner NORTHEASTERN UNIV LIAONING
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