Belt rewinding protection device of mechanical self-locking belt conveyor

Abstract

The utility model discloses a mechanical self-locking belt conveyor belt rewinding protection device which comprises a one-way ratchet wheel, the one-way ratchet wheel comprises a ratchet wheel outer wheel and a ratchet wheel inner wheel, the ratchet wheel inner wheel is in axial transmission connection with a belt carrier roller, the ratchet wheel outer wheel is in meshing transmission with a sliding rack, and a first transmission gear matched with the sliding rack is arranged on the sliding rack. The first transmission gear is in meshing transmission with the second transmission gear; the ratchet wheel inner wheel, the first transmission gear and the second transmission gear are all rotationally arranged on the fixed rack, and the sliding rack is arranged on the fixed rack in a sliding mode. One end of the sliding rack is connected with one end of the spring; a first locking block is arranged on the first transmission gear, and a second locking block matched with the first locking block is arranged on the second transmission gear. When the conveying belt is rewound, the conveying belt is clamped through the two locking blocks to achieve braking. The device adopts a mechanical self-locking structure and is simple in structure, free of external power, rapid in response, high in self-adaptive capacity and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for coal transportation systems in thermal power plants, specifically to a mechanical self-locking belt conveyor reversing protection device. Background Technology

[0002] In the field of safety protection technology for coal transportation systems in thermal power plants, conveyor belts, as core equipment for continuous material transport, directly impact production efficiency and operational safety due to their safety and reliability. During operation, conveyor belts may reverse due to material accumulation, mechanical failure, or external impacts. Failure to detect and brake reversal in a timely manner can easily lead to serious consequences such as equipment damage or even personal injury. Therefore, reversal protection devices, as critical equipment in the conveyor belt system, must possess rapid response and reliable braking capabilities.

[0003] Currently widely used electrically controlled clamping rewind protection devices mainly rely on sensors to detect rewind signals and use an electronic control system to drive a hydraulic or pneumatic actuator to achieve clamping and braking. This type of technical solution has the following drawbacks: 1. Complex structure: It requires multiple components such as sensors, controllers, power sources, and actuators, making installation and debugging difficult and requiring significant space. 2. Reliance on electronic control systems: In harsh conditions such as humidity, dust, or vibration, electronic components are prone to failure, leading to malfunctions or braking delays; the electronic control system cannot function during power outages. 3. High maintenance costs: It requires regular calibration of sensor accuracy and maintenance of hydraulic / pneumatic pipelines, and troubleshooting relies on professional personnel. Utility Model Content

[0004] The purpose of this utility model application is to address the shortcomings of the above-mentioned technology by providing a mechanical self-locking belt conveyor reversal protection device, which can effectively brake the conveyor belt in a timely manner when reversal occurs, thereby protecting the equipment and personnel. The device has a simple structure, requires no external power, responds quickly, and is easy to maintain.

[0005] To achieve the above objectives, the mechanical self-locking belt conveyor reversing protection device provided by this utility model adopts the following technical solution:

[0006] The system includes a one-way ratchet, comprising an outer ratchet wheel and an inner ratchet wheel. The inner ratchet wheel is axially connected to a belt roller, and the outer ratchet wheel meshes with a sliding rack. The sliding rack has a cooperating first transmission gear, which meshes with a second transmission gear. The inner ratchet wheel, the first transmission gear, and the second transmission gear are all rotatably mounted on a fixed frame, and the sliding rack is slidably mounted on the fixed frame. One end of the sliding rack is connected to one end of a spring, and the other end of the spring is connected to the fixed frame. A first locking block is fixedly mounted on the first transmission gear, and a second locking block that cooperates with the first locking block is fixedly mounted on the second transmission gear. With this technical solution, when the conveyor belt is running normally, the first and second locking blocks are in the open state. When the conveyor belt rewinds, the first and second locking blocks clamp the conveyor belt to achieve braking. When the conveyor belt resumes normal operation, the first and second locking blocks disengage from the conveyor belt and return to the open state.

[0007] Preferably, the outer wheel of the ratchet has an outer ring gear that meshes with the sliding rack on its outer side, and ratchet teeth for unidirectional drive in reverse rotation on its inner side. The inner wheel of the ratchet has multiple pawls that mesh with the ratchet teeth, and a pawl spring for lifting the pawl is located below each pawl. With this design, when the inner wheel of the ratchet rotates forward, the pawl passes the protrusion of the ratchet tooth, causing the pawl to be pressed down by the protrusion and compressing the pawl spring. Therefore, the pawl continuously slides under the protrusion of the ratchet tooth, and the inner wheel of the ratchet does not drive the outer wheel of the ratchet. When the inner wheel of the ratchet rotates in reverse, the pawl passes the notch of the ratchet tooth, and the pawl is lifted by the pawl spring and pressed against the notch, achieving reverse rotation drive and causing the outer wheel of the ratchet to rotate in the opposite direction. This design is simple in structure and has stable and reliable performance.

[0008] Preferably, the belt idler roller and the inner ratchet wheel are bolted together. This design simplifies installation, ensures a secure connection, and facilitates disassembly.

[0009] Preferably, the sliding rack and the spring are fixed together by welding. This technical solution ensures a stable connection between the sliding rack and the spring, and facilitates installation.

[0010] Preferably, the spring is fixed to the fixed frame by welding. This technical solution ensures a stable connection between the spring and the fixed frame and facilitates installation.

[0011] Preferably, the first transmission gear is bolted to the first locking block; the second transmission gear is bolted to the second locking block. This technical solution ensures a stable connection between the transmission gear and the locking block, and facilitates installation and disassembly.

[0012] Preferably, the first and second transmission gears are located on the side closer to the spring, and the one-way ratchet is located on the side farther from the spring. By adopting this technical solution, when the conveyor belt rewinds, the clamping position of the first and second locking blocks is closer to the upstream of the conveyor belt in the rewinding direction, which is more conducive to braking.

[0013] Preferably, the cross-sectional shape of both the first locking block and the second locking block is a combination of an ellipse and a circle. When the thickness of the conveyor belt is different, the angle of rotation required for the first locking block and the second locking block to clamp is also different. By adopting this technical solution, the contact surfaces between the first locking block and the second locking block and the conveyor belt are both arc surfaces, which can adapt to different clamping angles and improve the adaptability.

[0014] The beneficial effects achieved by this utility model are:

[0015] 1. This device uses the reverse rotation of a one-way ratchet and the meshing of a gear and rack to ultimately cause the two locking blocks to clamp the conveyor belt and achieve braking. It is a mechanical self-locking structure with a simple structure and convenient and quick installation and debugging.

[0016] 2. The braking action is triggered by the reverse rotation of the belt roller and the one-way ratchet. It requires no external power, is not affected by environmental factors, and can work normally when the power is interrupted.

[0017] 3. When the conveyor belt reverses, it can immediately trigger the clamping brake. The greater the reverse movement of the conveyor belt, the greater the rotation amplitude of the two locking blocks, and the tighter the conveyor belt is clamped. Therefore, it has a rapid response and strong adaptability.

[0018] 4. Due to its simple structure and ease of maintenance, the device reduces maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention under normal operating conditions of the conveyor belt;

[0020] Figure 2 This is a partial structural diagram of the one-way ratchet of this utility model;

[0021] Figure 3 This is a schematic diagram of the present invention in the reverse state of the conveyor belt;

[0022] The components are: 1. Belt roller; 2. One-way ratchet; 21. Outer ratchet wheel; 211. Outer ring gear; 212. Ratchet tooth; 22. Inner ratchet wheel; 221. Pad; 222. Pad spring; 3. Sliding rack; 4. First transmission gear; 5. Second transmission gear; 6. First locking block; 7. Second locking block; 8. Spring; 9. Fixed frame; 10. Conveyor belt. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "forward," "reverse," "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0026] like Figure 1As shown, the mechanical self-locking belt conveyor reversing protection device includes a one-way ratchet 2, which includes an outer ratchet wheel 21 and an inner ratchet wheel 22. The inner ratchet wheel 22 is axially connected to the belt idler roller 1. The belt idler roller 1 is located below the conveyor belt 10, maintaining contact with the conveyor belt 10 and running synchronously. The outer ratchet wheel 21 meshes with a sliding rack 3. The sliding rack 3 is provided with a first transmission gear 4 that cooperates with it. The first transmission gear 4 and the second transmission gear 5 are meshed and driven. The inner ratchet wheel 22, the first transmission gear 4, and the second transmission gear 5 are all rotatably mounted on the fixed frame 9. The sliding rack 3 is slidably mounted on the fixed frame 9. One end of the sliding rack 3 is connected to one end of a spring 8, and the other end of the spring 8 is connected to the fixed frame 9. A first locking block 6 is fixedly mounted on the first transmission gear 4, and a second locking block 7 that cooperates with the first locking block 6 is fixedly mounted on the second transmission gear 5. In this embodiment, the belt roller 1 and the inner ratchet wheel 22 are bolted together; the sliding rack 3 and the spring 8 are welded together; the spring 8 and the fixed frame 9 are welded together; the first transmission gear 4 and the first locking block 6 are bolted together; the second transmission gear 5 and the second locking block 7 are bolted together; the first transmission gear 4 and the second transmission gear 5 are located on the side closer to the spring 8, and the one-way ratchet 2 is located on the side farther from the spring 8; the cross-sectional shape of the first locking block 6 and the second locking block 7 is a combination of ellipse and circle.

[0027] In this embodiment, when the conveyor belt 10 rewinds, the first locking block 6 and the second locking block 7 can immediately clamp the conveyor belt 10 for braking without external power, exhibiting high sensitivity. Furthermore, the cross-sectional shape of both the first locking block 6 and the second locking block 7 is a combination of ellipse and circle, ensuring that the contact surfaces between the two locking blocks and the conveyor belt 10 are both arc surfaces. This allows them to adapt to different clamping angles, i.e., to conveyor belts 10 of different thicknesses, enhancing the adaptability of the device.

[0028] like Figure 2As shown, the outer side of the ratchet outer wheel 21 is provided with an outer ring gear 211 that cooperates with the sliding rack 3, the inner side of the ratchet outer wheel 21 is provided with ratchet teeth 212 for reverse rotation and unidirectional drive, the inner wheel 22 of the ratchet is provided with multiple pawls 221 that cooperate with the ratchet teeth 212, and a pawl spring 222 for lifting the pawl 221 is provided below the pawl 221. By adopting this technical solution, when the inner ratchet wheel 22 rotates in the forward direction, the pawl 221 passes over the protrusion of the ratchet tooth 212. The pawl 221 is pressed down by the protrusion of the ratchet tooth 212, compressing the pawl spring 222. Therefore, the pawl 221 continuously slides under the protrusion of the ratchet tooth 212, and the inner ratchet wheel 22 does not drive the outer ratchet wheel 21. When the inner ratchet wheel 22 rotates in the reverse direction, when the pawl 221 passes over the notch of the ratchet tooth 212, the pawl 221 is pushed up by the pawl spring 222 and abuts against the notch of the ratchet tooth 212, achieving reverse rotation drive and causing the outer ratchet wheel 21 to rotate in the reverse direction. This technical solution has a simple structure and stable and reliable performance.

[0029] like Figure 3 As shown, the mechanical self-locking belt conveyor reversing protection device of this utility model brakes the conveyor belt 10 by clamping the conveyor belt 10 with the first locking block 6 and the second locking block 7 when the conveyor belt 10 reverses.

[0030] The principle of this utility model is as follows: When the conveyor belt 10 runs in the normal operating direction, the belt roller 1 and the inner ratchet wheel 22 rotate synchronously in the positive direction. At this time, the inner ratchet wheel 22 does not drive the outer ratchet wheel 21, the outer ring gear 211 remains stationary, the sliding rack 3 is kept in a fixed position by the pushing force of the spring 8, and the first locking block 6 and the second locking block 7 are in the open state and do not contact the conveyor belt 10.

[0031] When the belt conveyor reverses, the conveyor belt 10 runs in the opposite direction, and the belt idler roller 1 and the inner ratchet wheel 22 rotate synchronously in the opposite direction. At this time, the inner ratchet wheel 22 drives the outer ratchet wheel 21, causing the outer ring gear 211 to rotate in the opposite direction. The outer ring gear 211 meshes with the sliding rack 3, causing the sliding rack 3 to slide towards one end of the spring 8 and compress the spring 8. During the sliding process, the sliding rack 3 meshes with the first transmission gear 4, causing the first transmission gear 4 to rotate in the opposite direction, driving the first locking block 6 to rotate synchronously in the opposite direction. The first transmission gear 4 meshes with the second transmission gear 5, causing the second transmission gear 5 to rotate in the forward direction, driving the second locking block 7 to rotate synchronously in the forward direction. During the rotation, the first locking block 6 and the second locking block 7 move closer to the conveyor belt 10, eventually clamping the conveyor belt 10 and achieving braking. The greater the reverse movement amplitude of the conveyor belt 10, the greater the rotation amplitude of the first locking block 6 and the second locking block 7, and the tighter the clamping of the conveyor belt 10. Therefore, this device has high sensitivity and high adaptability.

[0032] When the conveyor belt 10 resumes normal operation, the belt roller 1 and the inner ratchet wheel 22 rotate synchronously in the forward direction. At this time, the inner ratchet wheel 22 does not drive the outer ratchet wheel 21. The spring 8 releases the preload, pushing the sliding rack 3 to slide. The sliding rack 3 meshes with the first transmission gear 4, causing the first transmission gear 4 to rotate in the forward direction, which drives the first locking block 6 to rotate synchronously in the forward direction. The first transmission gear 4 meshes with the second transmission gear 5, causing the second transmission gear 5 to rotate in the reverse direction, which drives the second locking block 7 to rotate synchronously in the reverse direction, so that the first locking block 6 and the second locking block 7 disengage from the conveyor belt 10.

[0033] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this utility model is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this utility model are defined only by the scope of the claims. Features of various embodiments of this utility model may be combined or spliced ​​together in part or in whole, and may be implemented in various different configurations as will be fully understood by those skilled in the art. Embodiments of this utility model may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0034] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and the above structures should all be considered to fall within the protection scope of this utility model.

Claims

1. A mechanical self-locking belt conveyor reversing protection device, characterized in that: It includes a one-way ratchet (2), which includes an outer ratchet wheel (21) and an inner ratchet wheel (22). The inner ratchet wheel (22) is axially connected to the belt roller (1). The outer ratchet wheel (21) meshes with a sliding rack (3). The sliding rack (3) is provided with a first transmission gear (4) that cooperates with it. The first transmission gear (4) and the second transmission gear (5) are meshed and driven. The inner ratchet wheel (22), the first transmission gear (4), and the second transmission gear (5) are all rotatably mounted on the fixed frame (9), and the sliding rack (3) is slidably mounted on the fixed frame (9); one end of the sliding rack (3) is connected to one end of the spring (8), and the other end of the spring (8) is connected to the fixed frame (9); a first locking block (6) is fixedly mounted on the first transmission gear (4), and a second locking block (7) that cooperates with the first locking block (6) is fixedly mounted on the second transmission gear (5).

2. Mechanical self-locking belt conveyor reverse run protection device according to claim 1, characterized in that The outer side of the ratchet outer wheel (21) is provided with an outer ring gear (211) that cooperates with the sliding rack (3). The inner side of the ratchet outer wheel (21) is provided with ratchet teeth (212) for reverse rotation and unidirectional drive. The inner wheel (22) of the ratchet is provided with a plurality of pawls (221) that cooperate with the ratchet teeth (212). A pawl spring (222) for lifting the pawl (221) is provided below the pawl (221).

3. The mechanical interlock belt reverser protection device of claim 1, wherein: The belt roller (1) and the ratchet inner wheel (22) are bolted together.

4. The mechanical interlock belt reverser protection device of claim 1, wherein: The sliding rack (3) and the spring (8) are fixed by welding.

5. The mechanical interlock belt reverser protection device of claim 1, wherein: The spring (8) is fixed to the fixed frame (9) by welding.

6. The mechanical interlock belt reverser protection device of claim 1, wherein: The first transmission gear (4) is bolted to the first locking block (6); the second transmission gear (5) is bolted to the second locking block (7).

7. The mechanical interlock belt reverser protection device of claim 1, wherein: The first transmission gear (4) and the second transmission gear (5) are located on the side close to the spring (8), and the one-way ratchet (2) is located on the side away from the spring (8).

8. The mechanical interlock belt reverser protection device of claim 1, wherein: The cross-sectional shape of the first locking block (6) and the second locking block (7) is a combination of an ellipse and a circle.

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