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Jaw crusher tooth plate wear detection sensor and detection method

A technology for jaw crushers and detection sensors, which is applied to instruments, measuring devices, grain processing, etc., can solve problems such as insufficient accuracy, waste of manpower, and inability to feedback wear conditions in time, so as to avoid errors and ensure uniformity

Active Publication Date: 2018-08-14
SHANGHAI YUNTONG INFORMATION SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of relying on human eye observation not only wastes manpower, but is not accurate enough to accurately quantify wear, and is not real-time enough to provide timely feedback on wear
Moreover, when adjusting the discharge opening based on human observation, repeated adjustments will be required due to observation errors

Method used

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  • Jaw crusher tooth plate wear detection sensor and detection method
  • Jaw crusher tooth plate wear detection sensor and detection method
  • Jaw crusher tooth plate wear detection sensor and detection method

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, various implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] The present invention utilizes the characteristics of ultrasonic transmission to reflect at the edge of different material interfaces to measure the thickness of the tooth plate of the jaw crusher so as to calculate the wear amount of the tooth plate. First, a group of coded ultrasonic waves are transmitted from the ultrasonic probe to one side of the tooth plate. When the ultrasonic waves pass through the edge of the interface between the other side of the tooth plate and the air, a strong reflected wave will be generated, which will penetrate the tooth plate and return to the ultrasonic probe. The difference t between the ultrasonic sending time and the ultrasonic receiving time, according to the formula s=s i -v*t / 2 can calculate the...

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Abstract

The invention provides a method and a sensor for detecting abrasion of a toothed plate of a jaw crusher. The sensor is mounted on a toothed plate fixing plate, an ultrasonic probe is closely attached to the toothed plate, calculation of thickness of the toothed plate can be realized by sending ultrasonic signals to the toothed plate and receiving reflected feedback signals, and abrasion conditions of the toothed plate can be calculated accordingly. The sensor adopts an orthogonal spread-spectrum coding technology, a group of narrow pulses is sent continuously, a total time length is increased to increase total energy of the pulse group, and consequently ultrasonic antijamming capability can be multiply improved. By the excellent-autocorrelation ultrasonic spread-spectrum coding technology, when code phases are aligned, broad pulses are restored, and when the code phases are not aligned, only noise is obtained, and similarly, the ultrasonic antijamming capability is effectively improved.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a device and method for detecting the wear degree of tooth plates of jaw crushers by using ultrasonic waves. Background technique [0002] Jaw crushers are mainly used for medium-sized crushing of various ores and bulk materials, and are widely used in mining, smelting, building materials, roads, railways, water conservancy and chemical industries. The working part of the jaw crusher is two tooth plates, one is the fixed tooth plate, which is fixed vertically (or the upper end is slightly outward) on the front wall of the machine body, and the other is the movable tooth plate, which forms a large upper and lower small tooth plate with the fixed tooth plate. The crushing cavity (that is, the working cavity). During the crushing process, the materials entering the crushing cavity are squeezed, thereby crushing the materials. [0003] The tooth plate is a vulnerable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B17/00B02C1/02B02C23/00
CPCB02C1/02B02C23/00G01B17/00
Inventor 董斌于剑锋毛嘉鲁方林黄东波李超孔颖刘茜
Owner SHANGHAI YUNTONG INFORMATION SCI & TECH CO LTD
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