WO2021226687A1

WO2021226687A1 - Equipment for detecting tears in a conveyor belt by means of a vibration sensor installed in a tube assembly positioned underneath said conveyor belt

Info

Publication number: WO2021226687A1
Application number: PCT/BR2021/050122
Authority: WO
Inventors: Henrique SEABRA CANAVERDE
Original assignee: Llk Engenharia Indústria E Comércio Ltda Epp
Priority date: 2020-05-13
Filing date: 2021-03-24
Publication date: 2021-11-18
Also published as: BR202020009463U2

Abstract

The invention relates to equipment for detecting tears in a conveyor belt comprising a base structure (2) provided with two parallel bars (21). Two parallel tubes (11) are fastened to the base structure (2) by any appropriate fastening means. A tube (12) perpendicular to the parallel tubes (11) is arranged in the central part of the tube assembly (1), connecting the two parallel tubes (11). A central tube (13) is arranged in the middle of the parallel tubes (11), making an intersection (4) in the centre of the perpendicular tube (12), forming a tube assembly (1) that is symmetrical in both the longitudinal direction and the transverse direction. The sensor (3) is installed in the lower portion of the intersection (4) of the central tube (13) with the perpendicular tube (12), receiving the vibrational stimuli transmitted by the tube assembly (1) and processing the electrical signals received, delivering an electrical signal as a function of the frequency.

Description

EQUIPMENT FOR DETECTING CONVEYOR BELT TEARS USING A VIBRATION SENSOR INSTALLED IN A TUBING ASSEMBLY POSITIONED BELOW THE SAID BELT

SHIPPING COMPANY

[001] The present utility model patent belongs to the field of conveyor belts, more specifically a system for detecting the occurrence of tears in said conveyor belts.

[002] Even more specifically, the present invention teaches a system and method that detects tears or breaks in a conveyor belt by analyzing the vibrational frequency of a set of tubes mounted on a base structure positioned below the conveyor belt. The set of tubes is provided with a strategically positioned vibration sensor, which signals the fall of material to a processor that transfers the signals to the communication protocol.

TECHNICAL STATUS

[003] Companies operating in the mining area and some other industries present a high occurrence of tears in the conveyor belts.

[004] When it breaks, these conveyor belts loosen strips, tear the edges and open tears and/or holes and, thus, the products transported on the belt are dispersed and create points to increase tears in it, causing the material to fall transported.

[005] The causes of tears are of the most varied, and can be caused by the presence of non-crushable materials, lamellar materials, misalignment, locking of rollers and locking by accumulation of material in transfers (chute).

[006] The indication of false alarms by current state-of-the-art detectors causes several unnecessary stops in the operation. [007] More specifically, in the state of the art technical solutions are found for detecting tears that comprise a hydrodynamic easel positioned below the belt and composed of glass tubes that break when hit by the belt strips. In the event of tears, the broken easels must be replaced.

[008] It is common for the mechanical components of these state-of-the-art failure detection equipment to become contaminated by material that normally falls from the belts, where the material added to these components cause various malfunctions, such as locks and false alarms.

[009] There are also in the prior art systems of rope, which are located below the belt suffering rupture by the impact of the strip on them. Thus, when the rope breaks, a counterweight attached to said rope moves, indicating the mat break.

[0010] There is also in the prior art a system of mobile trays that, as the material falls, it accumulates in this tray that moves due to the weight, until a sensor indicates a maximum programmed weight.

[0011] In summary, the disadvantages of the prior art are as follows:

- hydrodynamic easels are expensive and disposable;

- Rope systems are also disposable and suffer from wear and tear on the rope fiber, due to the environment in which they work. In addition, breakage is common to occur by materials that reach the rope but are not straps on the strap;

- the trays, as they are mobile systems, contaminate your devices and become stuck/locked or are completely loose, no longer working with the weight of the accumulated material. [0012] Advantageously, the present invention teaches a conveyor belt tear detection system having a set of tubes arranged in several transverse planes positioned below the conveyor belt and integrated with each other, provided with vibration sensors, strategically positioned in the structure , which signal the fall of material to a processor that transfers the signals to the communication protocol, also calibrating the amount of material that falls from the belt, thus avoiding false alarms.

[0013] Patent document BR102013000469-3 of 01/08/2013 shows a system and method for detecting a tear in a conveyor belt that comprises a lower portion of a tray equipped with vibration sensors that capture the intensity of the vibration caused by the fall of the belt product and sends the data to a processor.

[0014] In patent document BR 10 2013 000470 7 of 01/08/2013 a system is presented that comprises a set of tubes in a transverse plane positioned below the conveyor belt equipped with vibration sensors that detect the value of vibration intensity and forwards to a processor.

[0015] Document BR 20 2018 006162 9 filed on 03/27/2018 reveals a tear detection system in a conveyor belt that comprises a set of tubes positioned below the conveyor belt, said tubes being equipped with vibration sensors that detect the vibration intensity value and forwards to a processor where the value is compared with a reference value. If the value registered by the vibration sensor is greater than the maximum amplitude of the reference value, the conveyor belt operation is stopped.

[0016] The present invention, in a distinct and advantageous way, teaches a method and system with a new sensor, strategically positioned in the set of tubes, which does not require a complementary system to obtain data as a function of time and perform a Fast Transform of Fourier on other hardware to deliver as a function of frequency. [0017] The new sensor has advantageously hardware and new software that already do this processing, emitting data directly as a function of frequency, a key item in detecting what is actually happening with the system (alarm or non-alarm).

EQUIPMENT SUMMARY

[0018] The present utility model teaches an equipment for detecting tears in a conveyor belt comprising a base structure provided with two parallel bars on which a set of tubes are fixed.

[0019] The two parallel tubes are fixed to the base frame. A tube perpendicular to the parallel tubes is disposed in the middle of the tube assembly connecting the two parallel tubes.

[0020] A central tube is arranged in the medial portion of the parallel tubes making an intersection at the center of the perpendicular tube, forming a set of symmetrical tubes both in the longitudinal and in the transverse direction.

[0021] The set of tubes is still positioned below the conveyor belt. This equipment also analyzes the vibrational frequency sent by a sensor that is connected by cable to electrical power or is equipped with a battery and emits analog or digital signals via cables or wireless.

[0022] The sensor is installed in the lower portion of the intersection of the central tube with the perpendicular tube, and said sensor receives the vibrational stimuli transmitted by the set of tubes and processes the received electrical signals, delivering an electrical signal as a function of frequency.

BRIEF DESCRIPTION OF THE FIGURES

[0023] Figure 1 shows the perspective view of the base structure and the set of tubes.

[0024] Figure 2 shows a side view of the base structure and the set of tubes, now showing the positioning of the sensor.

[0025] Figure 3 shows a top view of the set of tubes. DETAILED EQUIPMENT DESCRIPTION

[0026] The present utility model teaches an equipment for detecting tears in a conveyor belt comprising a base structure (2) provided with two parallel bars (21) on which a set of tubes (1) that will receive the impact are fixed. of the system. That is, through the set of tubes

(I ) the equipment will receive vibrations from the rip of the conveyor belt and/or the material falling onto the said tubes (1).

[0027] Two parallel tubes (11) are attached to the base structure (2) by any means of attachment suitable for the purpose, for example, clamps or welding.

[0028] A tube perpendicular (12) to the parallel tubes (11) is arranged in the central part of the set of tubes (1) connecting the two parallel tubes (11).

[0029] A central tube (13) is disposed in the medial portion of the parallel tubes

(I I ), making an intersection (4) in the center of the perpendicular tube (12), forming a set of tubes (1) symmetric both in the longitudinal and in the transverse direction.

[0030] The symmetry of the set of tubes (1) guarantees an evenly distributed vibration capture.

[0031] The extension of the tubes (11 and 13) have an upward angle and are closed on the sides by a pair of tubes parallel to the tube (12), forming the side portions of the set of tubes (1).

[0032] The set of tubes (1) is then positioned below the conveyor belt.

[0033] Said equipment analyzes the vibrational frequency sent by a sensor (3) that is connected by cable to power supply or is equipped with a battery and emits analog or digital signals via cables or wireless.

[0034] The sensor (3) is installed in the lower portion of the intersection (4) of the central tube (13) and the perpendicular tube (12). After research and experimentation, it was noticed that the sensor (3) is better positioned in the central portion of the set of tubes (1), as it is capable of receiving vibrations in a distributed manner. In addition, the sensor (3) is positioned below the tubes so as not to suffer damage from falling material on it.

[0035] In this way, said sensor (3) receives the vibrational stimuli transmitted by the set of tubes (1) and processes the electrical signals received, delivering an electrical signal as a function of frequency. In other words, the sensor (3) now used does not require a complementary system to obtain data as a function of time and perform a Fast Fourier Transform.

[0036] The sensor (3) has integrated hardware and software that already processes the signals internally, providing data directly as a function of frequency, a key item in detecting the vibrations of the equipment, which is capable of identifying the breakage of the belt by emitting alarm.

[0037] List of numerical references of the present invention:

1- set of tubes;

11- parallel tubes;

12- perpendicular tube;

13- central tube;

2- base structure;

21- parallel bars;

3- sensor;

4- intersection.

Claims

1) Equipment for detecting tears in a conveyor belt comprising a base structure (2) provided with two parallel bars (21) on which a set of tubes (1) are fixed, and two parallel tubes (11) are fixed to the base structure (2); a pipe (12) perpendicular to said parallel pipes (11) is arranged in the central part of the set of pipes (1) connecting the two parallel pipes (11); a central tube (13) is arranged in the medial portion of the parallel tubes (11), making an intersection (4) in the center of the perpendicular tube (12), forming a set of tubes (1) symmetrical both in the longitudinal and in the transverse direction. , the set of tubes (1) being positioned below the conveyor belt; the equipment also analyzes the vibrational frequency sent by a sensor (3) that is connected by cable to power supply or has a battery and emits analog or digital signals via cables or wireless, characterized in that the sensor (3) is installed in the portion bottom of the intersection (4) of the central tube (13) with the perpendicular tube (12), said sensor (3) receiving the vibrational stimuli transmitted by the set of tubes (1) and processes the electrical signals received, delivering a signal electrical function as a function of frequency.