Anti-tearing protection device of belt conveyor

Abstract

The utility model discloses an anti-tear protection device of a belt conveyor, which relates to the technical field of belt conveying equipment and comprises a rack, a plurality of groups of conveying rollers uniformly arranged along the length direction of the rack and a conveying belt positioned on the plurality of groups of conveying rollers, a line laser scanner with a detection opening facing the upper portion of the conveying belt is arranged in the middle between the two sets of conveying rollers, and the line laser scanner is provided with a lens cleaning mechanism. Supports are arranged on the two sides of the rack and located in the middle of the position between the two sets of conveying rollers respectively, pressing roller sets are rotationally installed on the upper portions of the supports, pressing rollers of the pressing roller sets are attached to the top face and the bottom face of the conveying belt respectively, and a one-way rotating mechanism is arranged at the end of each pressing roller. The surface of the conveying belt can be scanned in the using process, the scanning result is transmitted to the interior of the main controller for data processing, the surface of the conveying belt is recognized, warning protection can be conducted in advance before breakage, and the using safety of the conveying belt is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of belt conveyor equipment, and in particular to a belt conveyor anti-tear protection device. Background Technology

[0002] Currently, in the process of protecting conveyor belts from tearing, coal collector contact switches are used to detect the tearing condition of the conveyor belt. Speed ​​sensors are also used for fracture detection, and the conveyor belt is lifted by controlling the crossbar to rise through a hydraulic cylinder to prevent the conveyor belt from collapsing. For example, Chinese patent CN202123399060.X discloses a conveyor belt tear protection device for belt conveyors, which includes a frame and a conveyor roller. The top of the frame is rotatably connected to the conveyor roller through a bearing. The outer side of the conveyor roller is used to install the belt. It also includes a speed sensor, which is installed on one side of the conveyor roller to detect the speed of the belt.

[0003] The two types of conveyor belt inspections mentioned above can only detect belts that have already broken; they cannot provide early warning or protection before a tear occurs. Furthermore, if the conveyor is tilted upwards during a break, the area below the break will slide directly downwards, posing a significant safety hazard. Utility Model Content

[0004] This invention provides a belt conveyor anti-tear protection device, which can solve the problem that the existing technology can only detect the conveyor belt after it breaks, but cannot provide early warning and protection before it tears.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: This belt conveyor anti-tear protection device includes a frame, multiple sets of conveyor rollers evenly arranged along the length of the frame, and a conveyor belt located on the multiple sets of conveyor rollers. A line laser scanner with its detection port facing upwards on the conveyor belt is provided at the middle position between two sets of conveyor rollers. The line laser scanner is equipped with a lens cleaning mechanism. Supports are provided on both sides of the frame and at the middle position between two sets of conveyor rollers. At least one pressure roller group consisting of two pressure rollers is rotatably mounted on the upper part of the support. The pressure rollers of the pressure roller group are respectively attached to the top and bottom surfaces of the conveyor belt. Each pressure roller has a one-way rotation mechanism at its end.

[0006] In the above-mentioned technical solution of the anti-tear protection device for belt conveyors, a more specific technical solution may be: the line laser scanner is mounted on a support rod, which is vertically set on one side of the frame at the middle position between the two sets of conveyor rollers. The support rod is in the shape of a "7", and its top bend extends toward the conveyor belt. The line laser scanner is located at the top bend of the second bracket.

[0007] In some possible implementations, the lens cleaning mechanism includes an electric telescopic rod, a mounting block, a U-shaped slide rod, a return spring, and a brush strip. The detection port of the line laser scanner is tilted towards the conveyor belt. The electric telescopic rod is vertically installed through the top bend of the support frame. The mounting block is installed at the bottom of the output end of the electric telescopic rod. The U-shaped slide rod is horizontally slidably mounted on the mounting block. A return spring is provided between the inner side of the closed end of the U-shaped slide rod and the mounting block. The two open ends of the U-shaped slide rod pass through the outer sides of the line laser scanner and the brush strip, which is in contact with the outer side of the detection port of the line laser scanner, is fixedly mounted between the two open ends.

[0008] In some possible implementations, the length of the brush bar is the same as the width of the detection port of the line laser scanner, and the bristles on the brush bar are made of nylon.

[0009] In some possible implementations, the unidirectional rotation mechanism includes a fixed disk with a hollow inner cavity. The inner wall of the fixed disk is provided with a plurality of mounting slots with openings facing the hollow inner cavity at even intervals. A pawl is hinged in each mounting slot, the front end of which extends into the hollow inner cavity. A compression spring is provided between each pawl and the inner side of its respective mounting slot. A ratchet is rotatably mounted in the hollow inner cavity. The top end of the pressure roller extends into the hollow inner cavity and is coaxially connected to the ratchet.

[0010] In some possible implementations, there are four pawls, the front ends of which abut against the back of the teeth of the ratchet when the compression spring is in the free state.

[0011] In some possible implementations, the surface of the pressure roller is provided with a plurality of anti-slip grooves, which are parallel to the length direction of the pressure roller.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0013] 1. Because a line laser scanner is installed above the conveyor belt, it can scan the surface of the conveyor belt during use, and then transmit the scanning results to the main controller for data processing. The surface of the conveyor belt can be identified, and an early alarm can be set up before breakage, thus ensuring the safety of the conveyor belt.

[0014] 2. This utility model features pressure roller sets on both sides of the conveyor belt. Each pressure roller rolls and squeezes the surface of the conveyor belt. During normal operation of the conveyor belt, the pressure rollers can rotate stably, increasing the number of support points and improving the stability of the conveyor belt. Each pressure roller is equipped with a one-way rotation mechanism consisting of a fixed plate, mounting groove, pawl, compression spring, and ratchet. When the conveyor belt breaks, it can prevent the pressure rollers from rotating in the opposite direction. The pressure rollers also prevent the conveyor belt from moving downward, preventing the material below the break and the conveyor belt from slipping, thus improving the safety of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 yes Figure 1 Enlarged view of section B in the middle.

[0018] Figure 4 This is a schematic diagram of the unidirectional rotation mechanism of this utility model.

[0019] Explanation of markings in the diagram:

[0020] Frame 1, conveyor roller 101, conveyor belt 102, support rod 2, line laser scanner 3, detection port 301, lens cleaning mechanism 4, electric telescopic rod 401, mounting block 402, U-shaped slide rod 403, return spring 404, brush strip 405, bracket 5, pressure roller 6, one-way rotation mechanism 7, fixed plate 701, hollow inner cavity 702, mounting groove 703, pawl 704, compression spring 705, ratchet 706. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Implementation Method 1

[0024] like Figure 1 As shown, this embodiment proposes a tear-resistant protection device for a belt conveyor, including a frame 1, conveyor rollers 101 evenly arranged along the length of the frame 1, and a conveyor belt 102 between the tops of the conveyor rollers 101; a line laser scanner 3 is provided above the middle position between the two sets of conveyor rollers 101, and the detection port of the line laser scanner 3 faces the conveyor belt 102. In this embodiment, the line laser scanner 3 is mounted on a support rod 2, which is vertically arranged on one side of the frame 1 and located in the middle position between the two sets of conveyor rollers 101. The support rod is in the shape of a "7", and its top bend extends toward the conveyor belt 102. The line laser scanner 3 is located at the top bend of the support frame 2, and the line laser scanner 3 is provided with a lens cleaning mechanism 4.

[0025] Supports 5 are provided on both sides of the frame 1, located at the midpoint between the two sets of conveyor rollers 101, such as... Figure 3 As shown, a pressure roller group consisting of two pressure rollers 6 is rotatably mounted on the upper part of the bracket 5. The two pressure rollers 6 of the pressure roller group are respectively attached to the top and bottom surfaces of the conveyor belt 102, that is, the conveyor belt passes continuously between the two pressure rollers 6. Each pressure roller 6 has a one-way rotation mechanism 7 at its end.

[0026] During operation, materials are conveyed on conveyor belt 102. Line laser scanner 3 scans the surface of conveyor belt 102 using a high-speed data acquisition card. This acquisition card can be either model QT1509RF or model QT12131, both of which are available on the market. The laser scan data is collected synchronously to ensure that no instantaneous tear signals are missed during high-speed operation (belt speed ≤ 6m / s). The data is then transmitted to the main controller, which uses Advantech UNO-3082G industrial computer with built-in belt tear positioning AI detection system software. This software can be purchased directly from the market and is ready to use immediately. The line laser scanner connects to the controller via Gigabit Ethernet, with a data transmission rate ≥100MB / s, ensuring a false negative rate of <0.1% at a belt speed of 6m / s. The controller displays a real-time 3D model of the conveyor belt 102 surface. When an anomaly is detected, the location of the crack is automatically marked and an alarm log is generated. The main controller has set thresholds: crack length >10mm and depth >2mm. When these thresholds are exceeded, an audible and visual alarm is triggered, and the machine is stopped. The response time is ≤200ms. Simultaneously, the fault location and image are uploaded to the central control system via 4G / Ethernet to prevent breakage of the conveyor belt 102. Furthermore, during use, the lens cleaning mechanism 4 is periodically activated to clean the line laser... The optical scanner 3 performs dust removal at the detection port. During use, the conveyor belt 102 drives the pressure roller group to rotate synchronously. If the conveyor belt 102 breaks instantly, the pressure roller 6 will provide support for the conveyor belt 102 between the two sets of conveyor rollers 101 to increase the stability of the conveyor belt 102 and prevent the conveyor belt 102 from sinking between the two sets of conveyor rollers 101. In addition, if the material is conveyed at an angle upward, the bottom of the conveyor belt 102 at the break point will be subjected to a large downward force. Due to the presence of the one-way rotation mechanism 7, the conveyor belt 102 cannot rotate in the opposite direction. Therefore, the conveyor belt 102 can be clamped and limited to ensure the stability of the position of the conveyor belt 102 and reduce the probability of safety accidents.

[0027] Implementation Method 2

[0028] like Figure 2As shown, in a preferred embodiment, based on the above embodiment, the lens cleaning mechanism 4 includes an electric telescopic rod 401, a mounting block 402, a U-shaped slide rod 403, a return spring 404, and a brush strip 405. The detection port 301 of the line laser scanner 3 is inclined towards the conveyor belt 102, 300-500mm away from the surface of the conveyor belt 102, and the detection port makes an angle of 30° with the vertical direction to avoid material splashing directly onto the lens, while reducing the reflection on the surface of the conveyor belt 102; the electric telescopic rod 401 vertically penetrates the lens... Mounted on the top bend of the support frame 2, the bottom of the output end of the electric telescopic rod is equipped with a mounting block 402. A U-shaped slide rod 403 is horizontally slidably mounted on the mounting block. The open end of the U-shaped slide rod 403 passes through two horizontal through holes in the mounting block and slides freely in these two through holes. A return spring 404 is provided between the inner side of the closed end of the U-shaped slide rod and the mounting block 102. The two open ends of the U-shaped slide rod pass through the outer sides of the line laser scanner 3 respectively, and a brush strip 405 is fixedly mounted between the two open ends.

[0029] When cleaning the detection port of the line laser scanner 3, the electric telescopic rod 401 is activated to push the mounting block 402 downward, which in turn drives the U-shaped slide rod 403 and the brush strip downward. The downward stroke is set to 20mm and the speed to 5mm / s according to the lens size. Under the elastic force of the return spring 404, the U-shaped slide rod 403 will slide horizontally. The elastic coefficient of the return spring 404 is k=2N / mm and the pre-compression is 5mm to ensure that the contact pressure between the brush strip 405 and the lens surface is 10N, which ensures the cleaning effect and avoids scratching the lens. Therefore, the brush strip 405 closely fits the outside of the detection port of the line laser scanner 3 and moves downward to clean the detection port of the line laser scanner 3. After cleaning, the electric telescopic rod 401 is reset and the brush strip 405 moves back to the top of the detection port of the line laser scanner 3. The brush strip 405 is attached to the outside of the detection port of the line laser scanner 3. The length of the brush strip 405 is the same as the width of the detection port of the line laser scanner 3. The bristles on the brush strip are made of nylon. Nylon bristles have the characteristics of high elasticity, wear resistance and high temperature resistance, making them very suitable for glass cleaning. After the brush strip 405 passes through the detection port of the line laser scanner 3, it is thoroughly cleaned.

[0030] like Figure 4As shown, in a preferred embodiment, based on the above method, the unidirectional rotation mechanism 7 includes a fixed disk 701, which has a hollow inner cavity 702. The inner wall of the fixed disk 701 is evenly spaced with multiple mounting slots 703 opening towards the hollow inner cavity 702. A pawl 704 is hinged to each mounting slot, with its front end extending into the hollow inner cavity. A compression spring 705 is provided between each pawl 704 and the inner side of its respective mounting slot 703. The rotation within the hollow inner cavity... A ratchet 706 is installed, with an involute tooth profile and a tooth height of 4mm, ensuring that the pawl 704 engages to a depth ≥3mm. Each pawl 704 has a width of 8mm, matching the tooth width of the ratchet 706. The end of the pressure roller 6 extends into the hollow cavity 702 and is coaxially connected to the ratchet 706. There are four pawls 704, ensuring stable positioning of the ratchet 706. When the compression spring 705 is in a free state, the front end of the pawl 704 rests against the rear side of the teeth of the ratchet 706. Figure 3 As shown, each pressure roller 6 has several anti-slip patterns on its surface. These anti-slip patterns are parallel to the length of the pressure roller 6. The anti-slip patterns on the surface of the pressure roller 6 can increase the friction between it and the conveyor belt 102 and improve the anti-slip effect. The anti-slip patterns on the surface of the pressure roller 6 are 1.5 mm deep and 5 mm apart, and are made of polyurethane material.

[0031] During operation, materials are conveyed on the surface of the conveyor belt 102. The line laser scanner 3 scans the surface of the conveyor belt 102. After the line laser scan data is collected, it is transmitted to the main controller. The controller has a set threshold: crack length > 10mm and depth > 2mm. When the set threshold is exceeded, an audible and visual alarm is triggered and the machine is stopped. The response time is ≤ 200ms. At the same time, the fault location and image are uploaded to the central control system via 4G / Ethernet to prevent breakage of the conveyor belt 102. During operation, the electric telescopic rod 401 is periodically activated to lower the mounting block 402. The U-shaped slide rod 403 slides horizontally under the elastic force of the return spring 404. The brush strip 405 is always in close contact with the detection port of the line laser scanner 3 and moves from top to bottom to clean the detection port of the line laser scanner 3. After cleaning, the electric telescopic rod 401 resets. The brush bar 405 moves back to the top of the detection port of the line laser scanner 3. During use, the conveyor belt 102 drives the pressure roller 6 to rotate synchronously. The pressure roller 6 drives the ratchet 706 to rotate. The pawl 704 does not interfere with the forward rotation of the ratchet 706. When the conveyor belt 102 breaks instantly, the pressure roller 6 provides support for the conveyor belt 102 between the two sets of conveyor rollers 101 to increase the stability of the conveyor belt 102 and prevent the conveyor belt 102 from sinking between the two sets of conveyor rollers 101. In addition, if the material is conveyed at an angle upward, the conveyor belt 102 at the bottom of the break is subjected to a large downward force. At this time, the pawl 704 inserts into the back side of the teeth of the ratchet 706 to prevent the ratchet 706 and the pressure roller 6 from reversing. The pressure roller 6 applies resistance to the movement of the conveyor belt 102 to prevent the conveyor belt 102 from sliding in the opposite direction and to ensure the stability of the position below the break of the conveyor belt 102, thereby reducing the probability of safety accidents.

[0032] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A tear-resistant protection device for a belt conveyor, comprising a frame (1), multiple sets of conveyor rollers (101) uniformly arranged along the length of the frame (1), and a conveyor belt (102) located on the multiple sets of conveyor rollers (101), characterized in that: A line laser scanner (3) with its detection port facing the conveyor belt (102) is provided at the middle position between the two sets of conveyor rollers (101). The line laser scanner is provided with a lens cleaning mechanism (4). On both sides of the frame (1) and at the middle position between the two sets of conveyor rollers (101), brackets (5) are respectively provided. At least two pressure rollers (6) are rotatably mounted on the upper part of the brackets (5). The pressure rollers (6) of the pressure roller group are respectively attached to the top and bottom surfaces of the conveyor belt (102). Each pressure roller (6) is provided with a one-way rotation mechanism (7) at its end.

2. The anti-tear protection device for belt conveyors according to claim 1, characterized in that: The line laser scanner (3) is mounted on a support rod (2), which is vertically positioned on one side of the frame (1) at the midpoint between the two sets of conveyor rollers (101). The support rod is shaped like a "7" and its top bend extends toward the conveyor belt (102). The line laser scanner (3) is located at the top bend of the second bracket (2).

3. The anti-tear protection device for belt conveyors according to claim 2, characterized in that: The lens cleaning mechanism (4) includes an electric telescopic rod (401), a mounting block (402), a U-shaped slide rod (403), a return spring (404), and a brush strip (405). The detection port (3-1) of the line laser scanner (3) is tilted towards the conveyor belt (102). The electric telescopic rod (401) is vertically installed on the top bend of the support frame (2). The mounting block (402) is installed at the bottom of the output end of the electric telescopic rod (401). The U-shaped slide rod (403) is horizontally slidably mounted on the mounting block (402). A return spring (404) is provided between the inner side of the closed end of the U-shaped slide rod (403) and the mounting block (402). The two open ends of the U-shaped slide rod (403) pass through the outer sides of the line laser scanner (3) and the brush strip (405) is fixedly mounted between the two open ends, which is in contact with the outer side of the detection port of the line laser scanner (3).

4. The anti-tear protection device for belt conveyors according to claim 3, characterized in that: The length of the brush strip (405) is the same as the width of the detection port of the line laser scanner (3), and the bristles on the brush strip (405) are nylon bristles.

5. The anti-tear protection device for belt conveyors according to claim 1, characterized in that: The unidirectional rotation mechanism (7) includes a fixed disk (701) with a hollow inner cavity (702). The inner wall of the fixed disk (701) is provided with a plurality of mounting grooves (703) with openings facing the hollow inner cavity (702) at even intervals. A pawl (704) is hinged in each mounting groove. The front end of the pawl extends into the hollow inner cavity. A compression spring (705) is provided between each pawl (704) and the inner side of its respective mounting groove (703). A ratchet (706) is rotatably mounted in the hollow inner cavity. The top end of the pressure roller (6) extends into the hollow inner cavity (702) and is coaxially connected to the ratchet (706).

6. The anti-tear protection device for belt conveyors according to claim 5, characterized in that: There are four pawls (704). When the compression spring is in a free state, the front end of the pawl abuts against the back side of the ratchet tooth.

7. The anti-tear protection device for belt conveyors according to claim 5 or 6, characterized in that: The surface of the pressure roller (6) is provided with several anti-slip patterns, which are parallel to the length direction of the pressure roller (6).

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