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

Abstract

The invention relates to an elevator wire rope detection method, which includes: in each operation of the elevator, based on the destination layer number information received by the elevator control panel and the basic information of the elevator, obtaining the number of forward bends and reverse bends at each position of the elevator. The number of bends; obtain the total number of bends information and the maximum bending position information at each position in the elevator wire rope within the first preset time period; obtain the remaining bending fatigue of the elevator wire rope based on the total number of bending information and the maximum bending position information life value. The invention can obtain accurate bending times of the steel wire rope and send out an alarm signal according to the total bending times, so that maintenance personnel can inspect the elevator according to the alarm signal and improve 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...

Examples

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...

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...

Examples

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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