Conveyor belt tear detection device and method based on light curtain

Abstract

The present invention discloses a conveyor belt tear detection device and method based on a light curtain. The installation operation is simple and quick, and the risk of missed detection can be reduced. The device comprises a conveyor belt and a light curtain assembly. The light curtain assembly is fixed to the bottom of the conveyor belt through a light curtain installation assembly. The light curtain assembly comprises a light curtain transmitter and a light curtain receiver. The light curtain installation assembly comprises a base and a fixed bracket installed on the base. The light curtain emitted by the light curtain transmitter is in a cone shape and covers the bottom of the conveyor belt. The light curtain receiver is connected to a remote platform through wireless communication. The remote platform is electrically connected to an alarm device and a display. A method for detecting conveyor belt tear using the light curtain detection device is adopted. The light curtain transmitter emits a conical light curtain, and the light curtain receiver receives the light curtain emitted by the light curtain transmitter. When the conveyor belt is torn and materials or impurities fall from the conveyor belt, the light curtain emitted by the light curtain transmitter is blocked, the light curtain assembly is triggered and sends a signal to the remote platform, and the remote platform controls the alarm device to alarm.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor belt detection equipment, and in particular to a conveyor belt tear detection device and method based on a light curtain. Background Art

[0002] Conveyor belt, also known as transport belt, is a composite product of rubber, fiber and metal used in belt conveyor belt to carry and transport materials. It is widely used in coking, cement, metallurgy, chemical industry, coal, steel and other industrial fields. Currently, commonly used conveyor belts include PVC conveyor belt, PU conveyor belt, polyethylene conveyor belt, plastic chain conveyor belt, polypropylene conveyor belt, nylon conveyor belt, chain conveyor belt, etc. In the process of using conveyor belt to transport materials, especially when conveying sharp materials or coal, sharp materials or sharp impurities such as wooden sticks, steel bars, steel wires, etc. mixed in coal can easily scratch the conveyor belt, causing longitudinal tearing failure of the conveyor belt. When the conveyor belt is torn, it is easy to produce belt tongue, penetrate spilled materials, penetrate wooden sticks, iron wires, steel bars, etc. between the working surface and the non-working surface.

[0003] The commonly used conveyor belt tear detection method is point-to-point detection. This detection method mainly relies on photoelectric sensors. The corresponding photoelectric sensors are installed at the bottom end of the conveyor belt. When the conveyor belt is torn, sharp materials or sharp impurities such as steel bars and steel wires fall from the torn part of the conveyor belt and pass through two corresponding photoelectric sensors at the same time. The photoelectric sensor is triggered to detect the conveyor belt tear. However, this detection method has problems such as missed detection and difficult installation. During installation, the two corresponding photoelectric sensors need to correspond accurately, but the corresponding installation operation is relatively complicated. If the correspondence is inaccurate, it cannot be accurately triggered, resulting in problems such as missed detection. Summary of the invention

[0004] In view of the problems of missed detection and difficult installation in the prior art method of detecting conveyor belt tears by point-to-point installation of photoelectric sensors, the present invention provides a conveyor belt tear detection device based on a light curtain, which has simple and quick installation operation. At the same time, a conveyor belt tear detection method using the device is provided, which can reduce the risk of missed detection.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A conveyor belt tear detection device based on a light curtain, which includes a conveyor belt, and is characterized in that it also includes a light curtain assembly, wherein the light curtain assembly is fixed to the bottom of the conveyor belt through a light curtain mounting assembly, the light curtain assembly includes a light curtain transmitter and a light curtain receiver corresponding to the light curtain emitted by the light curtain transmitter, the light curtain mounting assembly includes a base and a fixed bracket mounted on the base, the fixed bracket includes at least two, the light curtain transmitter is fixed to one of the fixed brackets, the light curtain receiver is fixed to the other fixed bracket, the light curtain emitted by the light curtain transmitter is in a cone shape and covers the bottom of the conveyor belt, the light curtain receiver is communicatively connected to a remote platform through wireless communication, and the remote platform is electrically connected to an alarm device and a display.

[0007] Its further characteristic is that

[0008] The light curtain transmitter comprises a fiber optic sensor, a fiber optic amplifier, an optical fiber, and a lens. The fiber optic sensor is connected to one end of the light amplifier. The fiber optic amplifier and the lens are respectively installed at both ends of the optical fiber. The lens is a scattering lens with a magnifying function. The light source emitted by the fiber optic sensor is sequentially amplified by the fiber optic amplifier, transmitted by the optical fiber, and scattered by the lens, and then emitted in a cone shape.

[0009] The fixed bracket is adjustably mounted on the base through a first guide rail and a slider combination structure, and the light curtain transmitter and the light curtain receiver are adjustably mounted on the fixed bracket through a second guide rail and a slider combination structure respectively;

[0010] The first guide rail and slider combination structure comprises a first guide rail and a first slider, the base is provided with a transverse first guide rail, the bottom end of the fixed bracket is provided with the first slider matched with the first guide rail, and the first slider is fixed to the base by a lock buckle or a bolt;

[0011] The second guide rail and slider combination structure comprises a second guide rail and a second slider, the fixed bracket is respectively provided with the second longitudinal guide rail, the light curtain transmitter and the light curtain receiver are respectively adjustable and mounted on the fixed bracket through the second slider matched with the second guide rail, and the second slider and the third slider are fixed to the fixed bracket through locks or bolts;

[0012] The conveyor belt moves under the driving action of the conveyor roller, the fixed bracket includes a first fixed bracket and a second fixed bracket, the first fixed bracket and the second fixed bracket are distributed on both sides below the conveyor roller, the light curtain transmitter is installed on the first fixed bracket, and the light curtain receiver is installed on the second fixed bracket;

[0013] The conveying rollers include a first conveying roller, a second conveying roller and a third conveying roller symmetrically distributed on both sides of the first conveying roller, the first conveying roller, the second conveying roller and the third conveying roller form a trapezoidal structure that is wide at the top and narrow at the bottom, the conveyor belt is fixed to the top ends of the first conveying roller, the second conveying roller and the third conveying roller to form a U-shaped groove structure, and the light curtain assembly includes a first light curtain assembly, a second light curtain assembly and a third light curtain assembly, and the first light curtain assembly, the second light curtain assembly and the third light curtain assembly are respectively fixed to both sides of the bottom ends of the first conveying roller, the second conveying roller and the third conveying roller;

[0014] The first light curtain assembly includes a first light curtain transmitter and a first light curtain receiver, the second light curtain assembly includes a second light curtain transmitter and a second light curtain receiver, and the third light curtain assembly includes a third light curtain transmitter and a third light curtain receiver;

[0015] The fixed bracket includes a third fixed bracket to an eighth fixed bracket, the third fixed bracket and the fourth fixed bracket are distributed on both sides of the bottom end of the first conveying roller, the fifth fixed bracket and the sixth fixed bracket are distributed on both sides of the bottom end of the second conveying roller, and the seventh fixed bracket and the eighth fixed bracket are distributed on both sides of the bottom end of the third roller;

[0016] The third fixing bracket and the eighth fixing bracket are mirror-distributed on both sides of the base, the fifth fixing bracket and the sixth fixing bracket are mirror-distributed, the fourth fixing bracket and the seventh fixing bracket are mirror-distributed, the first light curtain transmitter and the first light curtain receiver are respectively installed on the third fixing bracket and the fourth fixing bracket, the second light curtain transmitter and the second light curtain receiver are respectively installed on the fifth fixing bracket and the sixth fixing bracket, and the third light curtain transmitter and the third light curtain receiver are respectively installed on the seventh fixing bracket and the eighth fixing bracket;

[0017] The third to eighth fixed brackets are adjustably mounted on the base through a third guide rail and a slider combination structure, and the first light curtain transmitter, the first light curtain receiver, the second light curtain transmitter, the second light curtain receiver, the third light curtain transmitter, and the third light curtain receiver are adjustably mounted on the third to eighth fixed brackets through a fourth guide rail and a slider combination structure respectively;

[0018] The third guide rail and slider combination structure includes a third guide rail, a fourth guide rail, and a fourth slider. The fourth guide rail and slider combination structure includes a fifth guide rail and a fifth slider. The base is provided with a third guide rail and a fourth guide rail. The third fixed bracket, the fourth fixed bracket, the seventh fixed bracket, and the eighth fixed bracket are respectively adjustable and mounted on the third guide rail through a fourth slider. The fourth slider includes four. The four fourth sliders are all slidably connected to the third guide rail and are respectively fixed to the base through locks or bolts. The fifth fixed bracket and the sixth fixed bracket are respectively adjustable and mounted on the fourth guide rail through the fourth slider. One side end of the third to eighth fixed brackets is respectively provided with a fifth guide rail. The first light curtain transmitter, the first light curtain receiver, the second light curtain transmitter, the second light curtain receiver, the third light curtain transmitter, and the third light curtain receiver are respectively adjustable and mounted on the fifth guide rail through a fifth slider. The fifth slider is respectively slidably connected to the fifth guide rail on each of the fixed brackets and is respectively fixed to the corresponding fixed bracket through bolts or locks.

[0019] The other side ends of the third to eighth fixing brackets are respectively provided with wire grooves, and the wires are installed in the wire grooves through tank chains;

[0020] The alarm device includes a buzzer and a flashing light.

[0021] A method for detecting conveyor belt tearing based on the above-mentioned light curtain detection device is characterized in that:

[0022] S1, the light curtain transmitter emits a conical light curtain, and the light curtain receiver receives the light curtain emitted by the light curtain transmitter;

[0023] S2. When the conveyor belt is torn and materials or impurities fall from the conveyor belt, the light curtain emitted by the light curtain transmitter is blocked, and when the amount of light received by the light curtain receiver is lower than a preset threshold, the light curtain assembly is triggered;

[0024] S3. The light curtain assembly sends a trigger signal to the remote platform, and the remote platform controls the alarm device to sound an alarm according to the trigger signal.

[0025] Its further characteristic is that

[0026] The preset threshold is set according to the working conditions of the conveyor belt, and the working conditions include belt speed and dust density.

[0027] The beneficial effects of adopting the above structure of the present invention are: 1. A light curtain assembly is installed under the conveyor belt, and the light curtain assembly includes a light curtain transmitter and a light curtain receiver. The light curtain emitted by the light curtain transmitter is cone-shaped and covers the bottom of the conveyor belt. When the conveyor belt is torn, impurities or materials fall from the torn part of the conveyor belt. Since the light curtain covers the bottom of the conveyor belt, the fallen impurities or sharp materials will inevitably block the light curtain. If the amount of light received by the light curtain receiver is lower than the preset threshold, the light curtain assembly is triggered, and the light curtain assembly sends a trigger signal to the remote platform through wireless communication. The remote platform controls the display of the display, and controls the alarm device to alarm, notifying the staff to deal with it in time, thereby realizing real-time monitoring of the conveyor belt tearing failure.

[0028] 2. The present invention realizes the detection of falling impurities or materials through the light curtain assembly. Since the light curtain is in a cone shape and covers the bottom of the conveyor belt, the falling impurities or sharp materials will inevitably block the light curtain. If the light received by the light curtain receiver is lower than the preset threshold, the light curtain assembly is triggered. Compared with the existing point-to-point detection method, the light curtain has a wider coverage range, which effectively reduces the risk of missed detection. The preset threshold is determined based on the working conditions of the conveyor belt: belt speed, dust density, which reduces the influence of belt speed and on-site dust amount on the light curtain assembly, further reducing the risk of missed detection.

[0029] 3. When the conveyor belt is a U-shaped groove structure, the light curtain assembly includes a first light curtain assembly, a second light curtain assembly, and a third light curtain assembly. The first light curtain assembly, the second light curtain assembly, and the third light curtain assembly are respectively fixed on both sides of the bottom ends of the first conveying roller, the second conveying roller, and the third conveying roller. The first light curtain assembly, the second light curtain assembly, and the third light curtain assembly respectively emit conical light curtains, further ensuring that the light curtain can completely cover the bottom of the U-shaped conveyor belt. When the conveyor belt is torn, impurities or materials fall from the torn part of the conveyor belt, and the light curtain is blocked. If the light received by the light curtain receiver is lower than the preset threshold, the light curtain assembly is triggered, which further reduces the risk of missed detection.

[0030] 4. The light curtain assembly is installed under the conveyor belt through the light curtain installation assembly. The installation assembly makes it easy to install and disassemble the light curtain assembly. The installation operation is simple and quick, which improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main structure of the first embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the main structure of Embodiment 2 of the present invention;

[0034] Figure 4 It is a schematic diagram of the top structure of the second embodiment of the present invention. DETAILED DESCRIPTION

[0035] See Figure 1 Embodiment 1: A conveyor belt tear detection device based on a light curtain comprises a conveyor belt 1 and a light curtain assembly 2. The light curtain assembly 2 is fixed to the bottom of the conveyor belt 1 through a light curtain installation assembly 3. The light curtain assembly 2 comprises a light curtain transmitter 21 and a light curtain receiver 22. The light curtain transmitter 21 comprises an optical fiber sensor, an optical fiber amplifier, an optical fiber, and a lens. The optical fiber sensor is connected to the optical fiber amplifier. The optical fiber amplifier and the lens are respectively installed at both ends of the optical fiber. The lens is a scattering lens with a magnifying function. The light source emitted by the optical fiber sensor is transmitted through the optical fiber and is magnified by the scattering lens and then emitted in a cone shape. The light curtain installation assembly 3 comprises a base 31 and two fixed brackets installed on the base 31: a first fixed bracket 321 and a second fixed bracket 322, respectively. The light curtain transmitter 21 is fixed to the first fixed bracket 321, and the light curtain receiver 22 is fixed to the second fixed bracket 322. The light curtain emitted by the light curtain transmitter 21 is in a cone shape and covers the bottom of the conveyor belt 1. The light curtain receiver 22 is connected to a remote platform 4 through wireless communication. The remote platform 4 is electrically connected to an alarm device 5 and a display 6.

[0036] The first fixed bracket 321 is adjustably mounted on the base 31 through a first guide rail and a slider combination structure, and the light curtain transmitter 21 and the light curtain receiver 22 are adjustably mounted on the second fixed bracket 322 through a second guide rail and a slider combination structure respectively;

[0037] The first guide rail and slider combination structure includes a first guide rail 11 and a first slider. The base 31 is provided with a transverse first guide rail 11. The bottom end of the first fixed bracket 321 is provided with a first slider matched with the first guide rail 11. The first slider is fixed to the base 1 by a lock buckle or a bolt (not shown in the figure).

[0038] The second guide rail and slider combination structure includes a second guide rail 12, a second slider, and a third slider. The second fixed bracket 322 is respectively provided with a longitudinal second guide rail 12. The light curtain transmitter 21 and the light curtain receiver 22 are respectively adjustably mounted on the second fixed bracket 322 through the second slider and the third slider matched with the second guide rail 12. The light curtain transmitter 21 is fixed to the second slider, and the light curtain receiver 22 is fixed to the third slider. The second slider and the third slider are fixed to the second fixed bracket 322 through lock buckles or bolts.

[0039] The conveyor belt 1 moves under the driving action of the conveyor roller 5 , and the light curtain transmitter 21 and the light curtain receiver 22 are distributed on both sides below the conveyor roller 5 under the support of the light curtain installation assembly 3 .

[0040] The light curtain transmitter 21 emits a conical light curtain, and the light curtain receiver 22 receives the light curtain emitted by the light curtain transmitter 21; when the conveyor belt is torn and materials or impurities fall from the conveyor belt, the light curtain emitted by the light curtain transmitter 21 is blocked, and the amount of light received by the light curtain receiver is lower than the preset threshold value, then the light curtain component is triggered and a fault signal is sent to the remote platform 4, and the remote platform 4 controls the sound and light alarm device to send out a sound and light alarm according to the trigger signal.

[0041] See Figure 2 to Figure 4 , Embodiment 2, a conveyor belt tear detection device based on a light curtain, comprising a conveyor belt 1, a light curtain assembly 2, the light curtain assembly 2 is fixed to the bottom of the conveyor belt 1 through a light curtain installation assembly 3, the light curtain assembly 2 comprises a light curtain transmitter and a light curtain receiver, the bottom end of the conveyor belt 1 is fixed to a conveying roller 5, the conveying roller 5 is a trapezoidal structure that is wide at the top and narrow at the bottom, comprising a first conveying roller 51, a second conveying roller 52 and a third conveying roller 53 that are symmetrically distributed on both sides of the first conveying roller 51, the conveyor belt 1 is a U-shaped groove structure, the conveyor belt 1 is fixed to the top of the first conveying roller 51, the second conveying roller 52, and the third conveying roller 53, the light curtain assembly 2 comprises a first light curtain assembly, a second light curtain assembly, and a third light curtain assembly, the first light curtain assembly, the second light curtain assembly, and the third light curtain assembly are respectively fixed to both sides of the bottom ends of the first conveying roller 51, the second conveying roller 52, and the third conveying roller 53;

[0042] The first light curtain assembly includes a first light curtain transmitter 21 and a first light curtain receiver 22, the second light curtain assembly includes a second light curtain transmitter 23 and a second light curtain receiver 24, the third light curtain assembly includes a third light curtain transmitter 25 and a third light curtain receiver 26, and the first light curtain transmitter 21, the second light curtain transmitter 23 and the third light curtain transmitter 25 all include a fiber optic sensor, a fiber optic amplifier, an optical fiber and a lens;

[0043] The light curtain installation assembly 3 includes a base 31, six fixed brackets installed on the base 31: a third fixed bracket 323, a fourth fixed bracket 324, a fifth fixed bracket 325, a sixth fixed bracket 326, a seventh fixed bracket 327, and an eighth fixed bracket 328, respectively; the first light curtain transmitter 21 is fixed to the third fixed bracket 323, the light curtain receiver 22 is fixed to the fourth fixed bracket 324, the light curtain emitted by the light curtain transmitter 21 is cone-shaped and covers the bottom of the conveyor belt 1, the light curtain receiver 21 is connected to the remote platform 4 through wireless communication, the remote platform 4 is electrically connected to the alarm device 5 and the display 6, the third fixed bracket 323 and the fourth fixed bracket 324 are distributed on both sides of the bottom end of the first conveying roller 51, the fifth fixed bracket 325 and the sixth fixed bracket 326 are distributed on both sides of the bottom end of the second conveying roller 52, and the seventh fixed bracket 327 and the eighth fixed bracket 328 are distributed on both sides of the bottom end of the third roller 53;

[0044] The third fixing bracket 323 and the fourth fixing bracket 324 are mirror-distributed on both sides of the base 31, the third fixing bracket and the eighth fixing bracket 328 are mirror-distributed, the fourth fixing bracket 325 and the seventh fixing bracket 327 are mirror-distributed, the fifth fixing bracket 325 and the sixth fixing bracket 326 are mirror-distributed, the first light curtain transmitter 21 and the first light curtain receiver 22 are respectively mounted on the third fixing bracket 323 and the fourth fixing bracket 324, the second light curtain transmitter 23 and the second light curtain receiver 24 are respectively mounted on the fifth fixing bracket 325 and the sixth fixing bracket 326, the third light curtain transmitter 25 and the third light curtain receiver 26 are respectively mounted on the seventh fixing bracket 327 and the eighth fixing bracket 328; during actual installation and application, the installation positions of the first light curtain transmitter 21 and the first light curtain receiver 22 can be interchanged, the installation positions of the second light curtain transmitter 23 and the second light curtain receiver 24 can be interchanged, and the positions of the third light curtain transmitter 25 and the third light curtain receiver 26 can be interchanged;

[0045] The third fixing bracket 323 to the eighth fixing bracket 328 are adjustably mounted on the base 31 through the third guide rail and the slider combination structure, and the first light curtain transmitter 21, the first light curtain receiver 22, the second light curtain transmitter 23, the second light curtain receiver 24, the third light curtain transmitter 25, and the third light curtain receiver 26 are adjustably mounted on the third fixing bracket 323 to the eighth fixing bracket 328 through the fourth guide rail and the slider combination structure;

[0046] The third guide rail and slider combination structure includes a third guide rail 13, a fourth guide rail 14, and a fourth slider. The fourth guide rail and slider combination structure includes a fifth guide rail 15 and a fifth slider. The fourth slider includes four and the fifth slider includes two. The base 31 is provided with the third guide rail 13 and the fourth guide rail 14. The third fixed bracket 323, the fourth fixed bracket 324, the seventh fixed bracket 327, and the eighth fixed bracket 328 are respectively adjustable and installed on the third guide rail 13 through the fourth slider. The four fourth sliders are all slidably connected to the third guide rail 13 and are respectively fixed to the base 31 through locks or bolts; the fifth fixed bracket 325 and the sixth fixed bracket 326 are respectively adjustable and installed on the fourth guide rail 14 through the fourth slider. After the two fifth sliders are slid and adjusted, they are respectively fixed through The lock buckle or bolt is fixed to the base 31, and the fifth guide rail 15 is respectively provided on one side end of the third fixed bracket 323 to the eighth fixed bracket 328. The first light curtain transmitter 21, the first light curtain receiver 22, the second light curtain transmitter 23, the second light curtain receiver 24, the third light curtain transmitter 25, and the third light curtain receiver 26 are respectively adjustable and installed on the fifth guide rail 15 through the fifth slider. The fifth slider is slidably connected to the fifth guide rail 15 on each fixed bracket, and is fixed to each fixed bracket through bolts or lock buckles; the other side ends of the third fixed bracket 323 to the eighth fixed bracket 328 are respectively provided with a wire groove, and the wire is installed in the wire groove through a tank chain to prevent the wire from being exposed and damaged, and at the same time, it is convenient to adjust the length of the wire according to actual needs;

[0047] The first light curtain transmitter 21, the second light curtain transmitter 23, and the third light curtain transmitter 25 all include a fiber optic sensor, an optical fiber, and a lens. The fiber optic sensor and the lens are respectively installed at both ends of the optical fiber, and the lens is a scattering lens with a magnifying function; the light source emitted by the fiber optic sensor is transmitted through the optical fiber, and is amplified by the scattering lens and emitted in a cone shape; the first light curtain receiver 22, the second light curtain receiver 24, the third light curtain receiver 26, and the alarm device are all electrically connected to the remote platform 4 (not shown in the figure), and the alarm device includes a buzzer and a flash light.

[0048] The first light curtain receiver 22, the second light curtain receiver 24, the third light curtain receiver 26, and the alarm device are all electrically connected to the remote platform 4 (not shown in the figure), and can respectively perform real-time detection on the left side, the right side, and the bottom of the conveyor belt through the first light curtain assembly, the second light curtain assembly, and the third light curtain assembly. When a tear occurs on any of the left side, the right side, and the bottom of the U-shaped conveyor belt, the fallen materials or impurities block the corresponding light curtains, and the light received by the light curtain receiver corresponding to the side where the fault occurs is lower than the preset threshold value, then the light curtain assembly is triggered, and a fault signal is sent to the remote platform, thereby realizing remote real-time monitoring of conveyor belt tearing. There is no need for maintenance personnel to regularly visit the site for inspection, and the detection operation is simple and quick. At the same time, it can avoid the problem of serious tearing of the conveyor belt due to untimely detection, thereby improving detection efficiency.

[0049] In the above-mentioned first and second embodiments, the preset threshold is determined comprehensively according to the working conditions of the conveyor belt, and the working conditions include the belt speed and the dust density. When the conveyor belt is torn and leaked, if the belt speed is too fast, the light curtain component is prone to fail to react in time and cause missed detection. If the amount of dust at the working site is too large, it is also easy to block the light curtain and cause the light curtain component to be triggered by mistake. Therefore, when installing the light curtain component, it is necessary to pre-adjust the light receiving amount threshold of the light curtain component according to the actual conditions on site (belt speed, dust density);

[0050] The fixed bracket can be adjustably mounted on the base through a guide rail and a slider combination structure, and the light curtain assembly can be adjustably mounted on each fixed bracket through a guide rail and a slider combination structure. Therefore, when the width and height of the conveyor belt change, the installation positions of the fixed bracket and the light curtain assembly can be adjusted respectively through the guide rail and the slider combination structure. For example, in Example 2, when the width of the conveyor belt changes, the distance between the third fixed bracket 323 and the fourth fixed bracket 324 can be adjusted by sliding the fourth slider, and the adjusted fourth slider can be fixed to the base by a screw, thereby meeting the installation requirements of the light curtain assembly when detecting conveyor belts of different specifications and improving versatility.

[0051] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A conveyor belt tear detection device based on a light curtain, comprising a conveyor belt, characterized in that: It also includes a light curtain assembly, which is fixed to the bottom of the conveyor belt through a light curtain installation assembly, and the light curtain assembly includes a light curtain transmitter and a light curtain receiver corresponding to the light curtain emitted by the light curtain transmitter, and the light curtain installation assembly includes a base and a fixed bracket installed on the base, and the fixed bracket includes at least two, the light curtain transmitter is fixed to one of the fixed brackets, and the light curtain receiver is fixed to the other fixed bracket, and the light curtain emitted by the light curtain transmitter is in a cone shape and covers the bottom of the conveyor belt, and the light curtain receiver is connected to a remote platform through wireless communication, and the remote platform is electrically connected to an alarm device and a display; The conveying rollers include a first conveying roller, a second conveying roller and a third conveying roller symmetrically distributed on both sides of the first conveying roller, the first conveying roller, the second conveying roller and the third conveying roller form a trapezoidal structure that is wide at the top and narrow at the bottom, the conveyor belt is fixed to the top ends of the first conveying roller, the second conveying roller and the third conveying roller to form a U-shaped groove structure, and the light curtain assembly includes a first light curtain assembly, a second light curtain assembly and a third light curtain assembly, and the first light curtain assembly, the second light curtain assembly and the third light curtain assembly are respectively fixed to both sides of the bottom ends of the first conveying roller, the second conveying roller and the third conveying roller; The first light curtain assembly includes a first light curtain transmitter and a first light curtain receiver, the second light curtain assembly includes a second light curtain transmitter and a second light curtain receiver, the third light curtain assembly includes a third light curtain transmitter and a third light curtain receiver, and the first light curtain transmitter, the second light curtain transmitter, and the third light curtain transmitter all include optical fiber sensors, optical fibers, and lenses; The fixed bracket includes a third fixed bracket to an eighth fixed bracket, the third fixed bracket and the fourth fixed bracket are distributed on both sides of the bottom end of the first conveying roller, the fifth fixed bracket and the sixth fixed bracket are distributed on both sides of the bottom end of the second conveying roller, the seventh fixed bracket and the eighth fixed bracket are distributed on both sides of the bottom end of the third conveying roller, the third fixed bracket and the eighth fixed bracket are distributed in a mirror image on both sides of the base, the fifth fixed bracket and the sixth fixed bracket are distributed in a mirror image, the fourth fixed bracket and the seventh fixed bracket are distributed in a mirror image, the first light curtain transmitter and the first light curtain receiver are respectively installed on the third fixed bracket and the fourth fixed bracket, the second light curtain transmitter and the second light curtain receiver are respectively installed on the fifth fixed bracket and the sixth fixed bracket, the third light curtain transmitter and the third light curtain receiver are respectively installed on the seventh fixed bracket and the eighth fixed bracket; The third to eighth fixed brackets are adjustably mounted on the base via a third guide rail and a slider combination structure, and the first light curtain transmitter, the first light curtain receiver, the second light curtain transmitter, the second light curtain receiver, the third light curtain transmitter, and the third light curtain receiver are adjustably mounted on the third to eighth fixed brackets via a fourth guide rail and a slider combination structure, respectively.

2. The conveyor belt tear detection device based on light curtain according to claim 1 is characterized in that: The light curtain transmitter includes a fiber optic sensor, a fiber optic amplifier, an optical fiber, and a lens. The fiber optic sensor is connected to one end of the fiber optic amplifier. The fiber optic amplifier and the lens are respectively installed at both ends of the optical fiber. The lens is a scattering lens with a magnifying function. The light source emitted by the fiber optic sensor is amplified by the fiber optic amplifier, transmitted by the optical fiber, and scattered by the lens, and then emitted in a cone shape.

3. The conveyor belt tear detection device based on light curtain according to claim 2 is characterized in that: The fixed bracket is adjustably mounted on the base through a first guide rail and a slider combination structure, and the light curtain transmitter and the light curtain receiver are adjustably mounted on the fixed bracket through a second guide rail and a slider combination structure.

4. A method for detecting conveyor belt tearing based on the light curtain detection device of claim 1 or 3, characterized in that: The light curtain transmitter emits a conical light curtain, and the light curtain receiver receives the light curtain emitted by the light curtain transmitter; When the conveyor belt is torn and materials or impurities fall from the conveyor belt, the light curtain emitted by the light curtain transmitter is blocked, and when the amount of light received by the light curtain receiver is lower than a preset threshold, the light curtain assembly is triggered; The light curtain assembly sends a trigger signal to the remote platform, and the remote platform controls the alarm device to sound an alarm according to the trigger signal.

5. The method for detecting tearing of a conveyor belt according to claim 4, characterized in that: The preset threshold is set according to the working conditions of the conveyor belt, and the working conditions include belt speed and dust density.

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