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Elevator safety inspection method based on number of bending times of elevator rope

A technology of bending times and wire ropes, used in elevators, transportation and packaging, etc., can solve problems such as low work efficiency of staff, wire fatigue, and decreased toughness

Active Publication Date: 2019-12-10
NORTHEASTERN UNIV
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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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  • Elevator safety inspection method based on number of bending times of elevator rope
  • Elevator safety inspection method based on number of bending times of elevator rope
  • Elevator safety inspection method based on number of bending times of elevator rope

Examples

Experimental program
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Effect test

Embodiment 1

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

[0119] Please refer to the attached figure 2 As shown, in this embodiment, based on the basic information of the elevator, the length L1 of the steel wire rope wound on the traction sheave during elevator operation is obtained according to the formula (a); where L1 is the first contact geometric tangent point 1 between the steel 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 sheave;

[0120] Formula (a):

[0121]

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

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

Embodiment 2

[0179] The present embodiment is as shown in Table 1 with reference to the elevator parameters of a certain business building.

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

[0181]

[0182] Q1: In this implementation, the diameters of the traction wheel and the guide wheel are 400 mm and 380 mm (mm), and the wrap angles are α=150° and β=120°. The 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 operation process since the elevator was installed and put into use, and the initial floor number of the elevator is 7 floors, then a i for 7. Assuming that the destination floor of the elevator is 15 floors, then b i for 15. It can be calculated that the length of the moving wire rope during the elevator’s ascent process is ΔHi=3×|15-7|=24m, the initial number of layers corresponds to the coordinate po...

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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 elevator wire ropes. Background technique [0002] With the development of economy and technology and the quickening pace of people's work and life, the running speed of the elevator as a means of transportation is also developing towards 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 of production and users and the safety of life and property. 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 shown in the use of the wire rope are broken wires and wear, which will incr...

Claims

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Application Information

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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
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