Automatic calibration method and system for elevator cage position

Abstract

The invention relates to the technical field of elevator cage position calibration, and discloses an automatic calibration method and system for the elevator cage position, and in the actual use process, the target height, the deceleration distance and the crawling distance all take the stroke depth as the reference, and the calibration accuracy is high. Therefore, high-speed parking caused by inaccurate depth, insufficient deceleration distance and insufficient crawling distance due to extension of the steel wire rope under the condition that the depth is not changed can be realized only by replacing the proportion of the pulse number to the actual depth in a source program; the problems that the actual parking point of the shaft does not change, but the calculated depth in the control system has deviation, and the deviation value is the elongation of the steel wire rope are solved, so that high-speed parking of the cage is eradicated, the cage is more stable and safer, the cage cannot jump up and down in the shaft due to high-speed parking, and the service life of the cage is prolonged. And the cage guide or the cage shoe of the cage is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of hoist cage position calibration, and in particular to an automatic calibration method and system for hoist cage position. Background Art

[0002] In the mine hoisting system, wire rope is an important component for cargo transportation. Multi-rope friction hoists generally use 4 or more wire ropes as the medium for cargo transportation, while single-rope winding hoists use one wire rope to lift the cage or bucket. During use, the wire rope will be deformed by stress and automatically extend and lengthen.

[0003] In the mine hoist transportation system, a lifting process is divided into: starting crawling area, acceleration area, high-speed operation area, deceleration area, and crawling area after deceleration. When the transported wire rope becomes longer, the initial design of the deceleration distance starting point, the low-speed crawling distance starting point, etc. will change. When the deceleration distance position point changes, the internal program of the hoist needs to be modified in time, otherwise it will cause the deceleration distance to be short, the crawling distance to be insufficient, and high-speed parking. For example, a mine hoist in use has a mine depth of 400 meters and uses a cage for lifting. There are three parking points in the shaft at 100 meters, 200 meters, and 300 meters respectively. The constant speed is 3.8m / s, the deceleration distance is 50 meters, the speed after deceleration is 0.5m / s, the crawling distance is 1m, and the crawling speed is 0.2m / s. The wire rope gradually stretches during use, and the elongation reaches 2 m. In this case, when running according to the original program, the deceleration distance from the deceleration position to the parking point becomes shorter. After the cage decelerates, it is running at a speed of 0.5m / s and suddenly a parking signal is detected. The cage has not entered the crawling interval and stops at a speed of 0.5m / s. After stopping, the travel of the control system is displayed as 98m. The actual parking point of the wellbore has not changed, but the depth calculated in the control system has deviated. The deviation value is the elongation of the wire rope. This situation is likely to cause safety accidents. High-speed parking of the cage may cause injuries to people inside the cage. High-speed parking may cause the cage to jump up and down in the wellbore, which may damage the cage track or cage ears. Summary of the invention

[0004] The object of the present invention is to provide a method and system for automatically calibrating the position of a hoist cage to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for automatically calibrating the position of a hoist cage, comprising the following steps: S1. Set up 4 parking points in the shaft, namely, wellhead A, well level 1 B, well level 2 C, well level 4 D; S2. During operation, when the cage is at the wellhead, calculate the ratio between the number of pulses and the stroke H = (FA) / G; S3. After the length of the wire rope changes under the action of gravity, the ratio between the number of pulses and the stroke is calculated to be K= (JA) / G; S4. Due to the elongation of the wire rope, the total number of pulses for calculating the depth deviates, and the ratio of the relative number of pulses to the stroke also changes. In actual use, the target height, deceleration distance, and crawling distance are all based on the stroke depth. The ratio of the number of pulses to the actual depth is replaced in the source program to achieve high-speed parking caused by inaccurate depth, insufficient deceleration distance, and insufficient crawling distance due to the elongation of the wire rope without changing the depth.

[0006] Optionally, S2 further includes: the number of pulses of the encoder at the wellhead is E, the number of pulses of the encoder when the cage moves downward to the downward parking point is F, and the number of pulses for a travel of G meters from the wellhead to the bottom of the well is (FA).

[0007] Optionally, S2 further includes: the length of the running range of the cage from the wellhead to the well bottom is G meters.

[0008] Optionally, S3 further includes: the number of pulses of the cage at the wellhead is A, and the number of pulses of the encoder is J due to the elongation of the wire rope when the cage is lowered to the well bottom D.

[0009] The present invention also proposes a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above method when executing the computer program.

[0010] The present invention also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer device, the computer device executes the above method.

[0011] Compared with the prior art, the present invention provides a method and system for automatically calibrating the position of a hoist cage, which has the following beneficial effects: The automatic calibration method and system for the position of the hoist cage, in actual use, the target height, deceleration distance, and crawling distance are all based on the stroke depth. Therefore, it is only necessary to replace the ratio of the number of pulses to the actual depth in the source program to achieve high-speed parking due to inaccurate depth, insufficient deceleration distance, and insufficient crawling distance caused by the elongation of the wire rope when the depth remains unchanged; avoid the situation where the actual parking point of the shaft has not changed, but the depth calculated in the control system has deviated, and the deviation value is the problem of the elongation of the wire rope, thereby preventing the cage from stopping at a high speed, and being more stable and safe, and preventing the cage from jumping up and down in the shaft due to high-speed parking, thereby damaging the cage channel or cage ears. DETAILED DESCRIPTION

[0012] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] The present invention provides a technical solution: a method for automatically calibrating the position of a hoist cage, comprising the following steps: S1. Set up 4 parking points in the shaft, namely, wellhead A, well level 1 B, well level 2 C, well level 4 D; S2. During operation, when the cage is at the wellhead, the ratio between the number of pulses and the stroke is calculated as H = (FA) / G; the number of pulses of the encoder at the wellhead is E, the number of pulses of the encoder when the cage moves downward to the downward parking point is F, and the number of pulses from the wellhead to the well bottom is G meters (FA), where the length of the running interval from the wellhead to the well bottom is G meters; S3. After the length of the wire rope changes under the action of gravity, the ratio between the number of pulses and the stroke is calculated to be K=(JA) / G. The number of pulses of the cage at the wellhead is A. When it is lowered to the bottom of the well D, the number of pulses of the encoder is J due to the elongation of the wire rope. S4. Due to the elongation of the wire rope, the total number of pulses for calculating the depth deviates, and the ratio of the relative number of pulses to the stroke also changes. In actual use, the target height, deceleration distance, and crawling distance are all based on the stroke depth. The ratio of the number of pulses to the actual depth is replaced in the source program to achieve high-speed parking caused by inaccurate depth, insufficient deceleration distance, and insufficient crawling distance due to the elongation of the wire rope without changing the depth.

[0014] This embodiment provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The above method is implemented when the processor executes the computer program.

[0015] This embodiment also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed on a computer device, the computer device executes the above method.

[0016] As an application of this embodiment: In actual use, the target height, deceleration distance and crawling distance are all based on the stroke depth. Therefore, you only need to replace the ratio of the number of pulses to the actual depth in the source program to achieve high-speed parking due to inaccurate depth, insufficient deceleration distance and insufficient crawling distance caused by the elongation of the wire rope when the depth remains unchanged; avoid the situation where the actual parking point of the wellbore has not changed, but the depth calculated in the control system has deviated. The deviation value is the problem of the elongation of the wire rope, thereby eliminating the high-speed parking of the cage, which is more stable and safe, and will not cause the cage to jump up and down in the wellbore due to high-speed parking, damaging the cage tank channel or cage ears.

[0017] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A method for automatically calibrating the position of a hoist cage, characterized in that: The steps include: S1. Set up 4 parking points in the shaft, namely, wellhead A, well level 1 B, well level 2 C, well level 4 D; S2. During operation, when the cage is at the wellhead, calculate the ratio between the number of pulses and the stroke H = (FA) / G; S3. After the length of the wire rope changes under the action of gravity, the ratio between the number of pulses and the stroke is calculated to be K= (JA) / G; S4. Due to the elongation of the wire rope, the total number of pulses for calculating the depth deviates, and the ratio of the relative number of pulses to the stroke also changes. In actual use, the target height, deceleration distance, and crawling distance are all based on the stroke depth. The ratio of the number of pulses to the actual depth is replaced in the source program to achieve high-speed parking caused by inaccurate depth, insufficient deceleration distance, and insufficient crawling distance due to the elongation of the wire rope without changing the depth.

2. A method and system for automatic calibration of the position of a hoist cage according to claim 1, characterized in that: The S2 further includes: the pulse number of the encoder at the wellhead is E, the pulse number of the encoder when the cage moves downward to the downward parking point is F, and the pulse number of the distance from the wellhead to the bottom of the well is G meters (FA).

3. A method and system for automatic calibration of the position of a hoist cage according to claim 2, characterized in that: The S2 further includes: the length of the running section of the cage from the wellhead to the well bottom is G meters.

4. A method and system for automatic calibration of the position of a hoist cage according to claim 1, characterized in that: The S3 further includes: the pulse number of the cage at the wellhead is A, and the pulse number of the encoder is J due to the elongation of the wire rope when the cage is lowered to the well bottom D.

5. A computer device, characterized in that: The computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 4 when executing the computer program.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which, when executed on a computer device, cause the computer device to perform the method according to any one of claims 1 to 4.