A conveyor belt tear detection device

Abstract

The present application relates to a kind of conveyor belt tear detection device, mainly used when the conveyor belt of belt conveyor is torn, can quickly detect the crack, prevent tear expansion, cause greater loss. Thin slice roller is installed in the end of rocker arm, and trumpet-shaped gap is arranged in the L-shaped end of rocker arm. One end of tension spring is hooked in the bottom of shell, and the other end is hooked in rocker arm, which makes the thin slice roller closely adhere to the bottom surface of conveyor belt by lever principle. According to the width of conveyor belt, several rocker arms are installed side by side on pin shaft, and thin slice roller is installed in the same end of each rocker arm to form an array. The ends of all rocker arms are on the pull cable. When the conveyor belt is torn, the crack runs above the thin slice roller array, the thin slice roller below the crack enters the crack of conveyor belt by the action of tension spring and the lever principle of rocker arm, and at the same time, the end of the rocker arm is pressed down and tightened to touch the micro switch, so as to trigger the alarm system to send stop signal.

Description

Technical Field

[0001] This invention relates to a conveyor belt tear detection device, which is mainly used to quickly detect when the conveyor belt of a belt conveyor is torn longitudinally by anchor bolts, gangue, or other reasons during operation, so as to prevent the tear from expanding and causing greater losses. Background Technology

[0002] Belt conveyors, especially those used in underground coal mines, frequently experience longitudinal tears when the conveyor belt is punctured by hard objects such as anchor bolts, ironware, and gangue in the incoming material. Because these hard objects remain, if the conveyor belt is not stopped promptly, the longitudinal tear will rapidly widen, leading to significant losses. Current methods for detecting longitudinal tears in conveyor belts primarily involve detecting material leaking through a tear or using visual recognition, light curtain beams, or ultrasonic waves. The former can only detect larger pieces of material leaking through large tears, making it difficult to detect smaller tears with fine powder leakage. The latter relies on light and sound waves, which are susceptible to dust, sludge, and moisture, resulting in a high false alarm rate. This invention, however, proposes a conveyor belt tear detection device that can directly detect longitudinal tears in conveyor belts. It features a simple structure, low cost, high reliability, and the ability to detect even small tears. Summary of the Invention

[0003] To achieve highly reliable conveyor belt tear detection, this invention provides a conveyor belt tear detection device.

[0004] The solution adopted by this invention to solve its technical problem is as follows: It consists of a thin roller 3, a rocker arm 4, a pin 5, a tension spring 6, a cable 7, a housing 8, a micro switch 9, and a spacer ring 10. The thin roller 3 is mounted on one end of the rocker arm 4 and can rotate flexibly on the rocker arm 4. The axial dimension of the thin roller 3 gradually decreases from the center to the edge. The pin 5 passes through and is fixed to the housing 8. The rocker arm 4 has a pin hole in the middle, through which the pin 5 passes. The other end of the rocker arm 4 is L-shaped, and a flared notch is provided at the L-shaped end of the rocker arm 4. One end of the tension spring 6 is hooked to the bottom of the housing 8, and the other end is hooked to the rocker arm 4, maintaining a certain initial tension. Through the lever principle, the thin roller 3 is kept in close contact with the bottom surface of the conveyor belt. According to the width of the conveyor belt, several rocker arms 4 are installed side by side on the pin 5 and separated from each other by spacer rings 10 to prevent interference. Each rocker arm 4 has a thin roller 3 mounted on the same end, allowing it to rotate flexibly. On the other side, a tension spring 6 holds the roller 3 in place, and lever principle presses it firmly against the bottom surface of the conveyor belt. To achieve dense coverage of the rollers 3 across the width of the conveyor belt, the length and shape of the extended arms of the rocker arm 4 on the roller 3 side are not uniform, resulting in two or more rows of rollers forming an array. A tension cable 7 runs taut across the outer casing 8, one end fixed to the casing 8, and the other end mounted on a micro switch 9, which is also fixed to the casing 8. The flared notches at the ends of all rocker arms 4 rest on the tension cable 7. The conveyor belt tear detection device of this invention is mounted and fixed on the belt conveyor frame via the outer casing 8, located near the material inlet in the unloading direction of the belt conveyor. When the conveyor belt is torn by hard objects such as anchor bolts, ironware, or gangue at the material receiving point, the tear travels along the conveyor belt to the area above the array of thin rollers 3. The thin rollers 3 located below the tear, under the action of the tension spring 6, enter the tear through the lever principle of the rocker arm 4. Simultaneously, the flared notch at the end of the rocker arm 4, under the action of the tension spring 6, presses down and tightens the cable 7, triggering the microswitch 9, thereby triggering the alarm system to issue a stop signal. The conveyor belt stops running in time, preventing the tear from expanding and causing greater losses. Two or more devices described in this invention can be installed under the conveyor belt to form a denser array of thin rollers 3, creating redundant reliability.

[0005] The beneficial effects of this invention are: the invention has a simple structure and reliable performance, and can detect conveyor belt tears in a timely and effective manner and send a signal, so that the conveyor belt can stop running in time and prevent greater losses. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0007] Figure 1 This is a schematic front view of the structure of the present invention.

[0008] Figure 2 This is a schematic diagram illustrating the action of detecting a conveyor belt tear.

[0009] Figure 3 This is a top view of the structure of the present invention.

[0010] In the diagram: 1. Belt conveyor frame, 2. Conveyor belt, 3. Thin roller, 4. Rocker arm, 5. Pin, 6. Tension spring, 7. Cable, 8. Housing, 9. Micro switch, 10. Spacer ring.

[0011] Figure 1 , Figure 2 , Figure 3 The direction indicated by the middle arrow is the running direction of conveyor belt 2. Detailed Implementation

[0012] exist Figure 1 , Figure 2 , Figure 3The conveyor belt tear detection device of the present invention comprises a thin roller 3, a rocker arm 4, a pin 5, a tension spring 6, a cable 7, a housing 8, a micro switch 9, and a spacer ring 10. The thin roller 3 is mounted on one end of the rocker arm 4 and can rotate flexibly on the rocker arm 4. The axial dimension of the thin roller 3 gradually decreases from the center to the edge. The pin 5 passes through and is fixed to the housing 8. The rocker arm 4 has a pin hole in the middle through which the pin 5 passes. The other end of the rocker arm 4 is L-shaped, with a flared notch at the L-shaped end. One end of the tension spring 6 is hooked to the bottom of the housing 8, and the other end is hooked to the rocker arm 4, maintaining a certain initial tension. Through the lever principle, the thin roller 3 is pressed tightly against the bottom surface of the conveyor belt 2. Depending on the width of the conveyor belt 2, several rocker arms 4 are installed side-by-side on the pin 5 and separated by spacer rings 10 to prevent interference. Each rocker arm 4 has a thin roller 3 mounted on the same end, allowing it to rotate flexibly. On the other side, a tension spring 6 holds the roller 3 in place, and leveraging this to press it firmly against the bottom surface of the conveyor belt 2. To achieve dense coverage of the rollers 3 across the width of the conveyor belt 2, the lengths and shapes of the extended arms of the rocker arms 4 on the roller 3 side are not uniform, resulting in two or more rows of rollers 3 arranged in an array. A tension cable 7 runs taut across the outer casing 8, one end fixed to the casing 8 and the other end mounted on a micro switch 9, which is also fixed to the casing 8. All the flared notches at the ends of the rocker arms 4 rest on the tension cable 7. The conveyor belt tear detection device of this invention is mounted and fixed on the belt conveyor frame 1 via the outer casing 8, located near the material inlet in the unloading direction of the belt conveyor. When the conveyor belt 2 is torn by hard objects such as anchor bolts, ironware, or gangue at the material receiving point, the tear travels along the conveyor belt 2 to the area above the array of thin rollers 3. The thin rollers 3 located below the tear, under the action of the tension spring 6, enter the tear in the conveyor belt 2 through the lever principle of the rocker arm 4. Simultaneously, the flared notch at the end of the rocker arm 4, under the action of the tension spring 6, presses down and tightens the cable 7, triggering the microswitch 9, thereby triggering the alarm system to issue a stop signal. The conveyor belt 2 stops running in time, preventing the tear from expanding and causing greater losses. Two or more devices described in this invention can be installed under the conveyor belt 2 to form a denser array of thin rollers 3, creating redundant reliability.

[0013] The conveyor belt tear detection device of the present invention has a simple structure and reliable performance. It can detect the tear of the conveyor belt in a timely manner and issue a stop signal to prevent the tear from spreading.

Claims

1. A conveyor belt tear detection device, characterized in that: It consists of a thin roller 3, a rocker arm 4, a pin 5, a tension spring 6, a cable 7, a housing 8, a micro switch 9, and a spacer ring 10. The thin roller 3 is mounted on one end of the rocker arm 4 and can rotate flexibly on the rocker arm 4. The pin 5 passes through and is fixed to the housing 8. The rocker arm 4 has a pin hole in the middle, through which the pin 5 passes. One end of the tension spring 6 is hooked to the bottom of the housing 8, and the other end is hooked to the rocker arm 4, maintaining a certain initial tension. Through the lever principle, the thin roller 3 is pressed tightly against the bottom surface of the conveyor belt. According to the width of the conveyor belt, several rocker arms 4 are installed side by side on the pin 5 and separated by spacer rings 10 to prevent interference. Each rocker arm 4 has a thin roller 3 mounted on the same end and can rotate flexibly on the rocker arm 4. On the other side, the tension spring 6 holds the thin roller 3 and, through the lever principle, presses it firmly against the bottom surface of the conveyor belt. A tension cable 7 runs taut across the outer casing 8, with one end fixed to the casing 8 and the other end mounted on a micro switch 9, which is also fixed to the casing 8. All the ends of the rocker arms 4 rest on the tension cable 7. When the conveyor belt is torn by hard objects such as anchor bolts, ironware, or gangue at the material inlet, the tear travels with the conveyor belt above the array of thin rollers 3. The thin rollers 3 located below the tear, under the action of the tension spring 6, enter the tear in the conveyor belt through the lever principle of the rocker arms 4. Simultaneously, the end of the rocker arm 4, under the action of the tension spring 6, presses down and tightens the tension cable 7, triggering the micro switch 9, thereby triggering the alarm system to issue a stop signal.

2. The conveyor belt tear detection device according to claim 1, characterized in that: The axial dimension of the thin roller 3 gradually decreases from the center to the edge.

3. The conveyor belt tear detection device according to claim 1, characterized in that: The other end of the rocker arm 4 is L-shaped, and a flared notch is provided at the L-shaped end of the rocker arm 4. The cable 7 is inserted into the flared notch.

4. The conveyor belt tear detection device according to claim 1, characterized in that: In order to achieve dense coverage of the thin rollers 3 in the width direction of the conveyor belt, the length and shape of the extended arms of the rocker arm 4 on the side of the thin rollers 3 are not uniform, so that the thin rollers 3 are distributed in two or more rows to form an array.

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