Emergency stop safety device of belt conveyor

Abstract

The utility model relates to the technical field of industrial belt conveyors, in particular to a belt conveyor emergency stop safety device which comprises a conveying belt, a head wheel, a tail wheel, a riding wheel, a tensioning device, a controller, a mechanical arm switch, an infrared switch and an adjustable support. The riding wheel is arranged on the lower contact face of the conveying belt to support the conveying belt for conveying, the tensioning device is arranged at the tensioning position of the tail wheel conveying belt, the mechanical arm switch is arranged on the adjustable support close to the tail wheel, and the starting direction of the mechanical arm switch is the running direction of the belt conveyor. The infrared switch is arranged at the top of the adjustable support at the upstream of the mechanical arm switch, the adjustable support adjusts and fixes a telescopic rod of the adjustable support through a screw and a nut, and signal lines of the mechanical arm switch and the infrared switch are connected to the input end of the controller; multiple operations of emergency stop of the belt conveyor are achieved, and casualty accidents are prevented.

Description

Technical Field

[0001] This utility model relates to the field of industrial belt conveyor technology, and in particular to an emergency stop safety device for belt conveyors. Background Technology

[0002] Belt conveyors are widely used in industrial production. During the production process, it is necessary for people and machines to work together, or for personnel to work around the operation and maintenance of belt conveyors.

[0003] During material transport by belt conveyors, due to variations in moisture content, particle size, and viscosity, materials can easily stick to the discharge hopper at the head of the conveyor during actual operation, requiring manual cleaning with tools. For belt conveyors that are below or close to ground level, workers operating nearby are at risk of falling onto the conveyor surface due to improper positioning, unsuitable tools, or inadequate safety precautions, resulting in injury or death. Furthermore, during belt conveyor maintenance and repair, personnel must stand on the conveyor surface; if communication and confirmation are inadequate, supervision is insufficient, or other management deficiencies lead to accidental start-up of the conveyor, also resulting in injury or death. Summary of the Invention

[0004] This utility model provides an emergency stop safety device for belt conveyors. In cases where personnel fall onto the conveyor surface or the belt conveyor is accidentally started during maintenance, multiple operations such as an emergency stop switch on a robotic arm, an infrared emergency stop switch, and a tension sensor are used to achieve an emergency stop of the belt conveyor, preventing personnel injury accidents.

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

[0006] An emergency stop safety device for a belt conveyor includes a conveyor belt, a head pulley, a tail pulley, a support roller, and a tensioning device. The conveyor belt is fitted onto the head pulley and the tail pulley. The support roller is positioned on the lower contact surface of the conveyor belt to support its transport. The tensioning device is located at the tensioning point of the tail pulley conveyor belt. The device also includes a controller, a robotic arm switch, an infrared switch, and an adjustable bracket. The robotic arm switch is mounted on the adjustable bracket near the tail pulley, and its opening direction is the same as the direction the belt conveyor is running. The infrared switch is located on the top of the adjustable bracket upstream of the robotic arm switch, and its height is higher than the height of the goods being transported by the belt. The adjustable bracket's telescopic rod is adjusted and fixed using screws and nuts. The signal lines of the robotic arm switch and the infrared switch are connected to the controller's input terminal, and the controller's output terminal is connected to the belt conveyor's emergency stop system.

[0007] Furthermore, the robotic arm switch is symmetrically arranged on the adjustable brackets on both sides of the belt. The robotic arm switch is equipped with a robotic arm, the length of which is 1 / 3 to 1 / 2 of the width of the belt conveyor frame. The one-way opening direction is the running direction of the belt conveyor, and the disconnection method is axial rotation.

[0008] Furthermore, the robotic arm has a rotation angle of 0 to 90°.

[0009] Furthermore, the infrared switch includes an infrared transmitter and an infrared receiver, which are symmetrically arranged on adjustable brackets on both sides of the belt. The signal line of the infrared switch is connected to the analog input terminal of the controller.

[0010] Furthermore, the height of the adjustable bracket is 0-300mm higher than the height of the conveyor surface of the belt conveyor, the lowest point of the telescopic rod of the adjustable bracket is 50-150mm higher than the conveyor surface of the belt conveyor, and the highest point of the telescopic rod of the adjustable bracket is not higher than 250-350mm higher than the conveyor surface of the belt conveyor.

[0011] Furthermore, the adjustable bracket at the location of the infrared switch is set at a position greater than the belt speed * switch response time + 3m.

[0012] Furthermore, it also includes a tension sensor, which is mounted on the tensioning device, and the signal line of the tension sensor is connected to the analog input terminal of the controller.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) Through the infrared switches, robotic arm switches and tension sensors at the tensioning device in the upstream and downstream relationships, multiple emergency stop schemes are provided for accidents such as personnel falling onto the conveyor belt surface or the maintenance belt being accidentally started, so as to achieve multiple protections and ensure the safety of operators;

[0015] 2) By setting an adjustable bracket, the height of the infrared switch and the robotic arm switch can be adjusted at any time according to the height of the goods, which facilitates maintenance and operation;

[0016] 3) The device has a simple structure and can be modified based on the original system with minimal changes, making it easy to implement and promote. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the installation position of the robotic arm switch described in this utility model.

[0019] Figure 3This is a schematic diagram of the mechanical arm rotation angle of the mechanical arm switch described in this utility model.

[0020] Figure 4 This is a schematic diagram of the installation position of the infrared switch described in this utility model.

[0021] In the diagram: 1. Conveyor belt; 2. Head pulley; 3. Tail pulley; 4. Support roller; 5. Tensioning device; 6. Robotic arm switch; 7. Infrared switch; 8. Adjustable bracket; 9. Nut; 10. Robotic arm. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0023] See Figure 1 This is a structural schematic diagram of the present invention. The present invention provides an emergency stop safety device for a belt conveyor, comprising a conveyor belt 1, a head pulley 2, a tail pulley 3, a support roller 4, a tensioning device 5, a controller, a robotic arm switch 6, an infrared switch 7, an adjustable bracket 8, and a tension sensor. The support roller 4 is disposed on the lower contact surface of the conveyor belt 1 to support its transport. The tensioning device 5 is disposed at the tensioning point of the conveyor belt on the tail pulley 3, and the tension sensor is disposed on the tensioning device 5.

[0024] See Figure 1-3 The robotic arm switch 6 is mounted on an adjustable bracket 8 near the tail wheel 3. The robotic arm switch 6 is equipped with a robotic arm 10. The length of the robotic arm 10 is 1 / 2 the width of the belt conveyor frame. The rotation angle of the robotic arm 10 is 0 to 90°. The one-way opening direction is the running direction of the belt conveyor. The disconnection method is axial rotation. The opening direction of the robotic arm switch 6 is the running direction of the belt conveyor.

[0025] See Figure 1 and Figure 4 The infrared switch 7 is located on the top of the adjustable bracket 8 upstream of the robotic arm switch 6. The height of the infrared switch 7 is higher than the height of the goods transported by the belt. The infrared switch 7 includes an infrared transmitter and an infrared receiver. The infrared transmitter and infrared receiver are symmetrically arranged on the adjustable brackets 8 on both sides of the belt. The adjustable bracket 8 where the infrared switch 7 is located is set at a position greater than the belt speed * switch response time + 3m.

[0026] See Figure 4 The adjustable bracket 8 is adjusted and fixed by screws and nuts 9. The height of the adjustable bracket 8 is 300mm higher than the height of the conveyor surface of the belt conveyor. The lowest point of the telescopic rod of the adjustable bracket 8 is 100mm higher than the conveyor surface of the belt conveyor, and the highest point of the telescopic rod of the adjustable bracket 8 is not higher than 300mm higher than the conveyor surface of the belt conveyor.

[0027] The signal lines of the robotic arm switch 6 and the infrared switch 7 are connected to the digital input terminal of the controller, and the signal line of the tension sensor is connected to the analog input terminal of the controller.

[0028] Working principle: The emergency stop switch of the belt conveyor is interlocked with the power system of the belt conveyor. If a person falls onto the conveyor surface during work or maintenance of the belt conveyor and the fall occurs between the infrared switch 7 and the head wheel 2, the falling person will block the infrared light of the infrared switch 7, and the controller will issue an emergency stop command, causing the belt conveyor to stop suddenly.

[0029] When the fall occurs between the robotic arm switch 6 and the infrared switch 7, the person falling will manually rotate the robotic arm switch 6 axially when they reach the position of the robotic arm switch 6 in the direction of belt travel. The controller will then issue an emergency stop command, and the belt conveyor will stop immediately.

[0030] Different belt tensions are set at the controller end according to different goods, so that the tension sensor on the tensioning device 5 can detect in real time whether a person falls onto the belt and causes a tension change exceeding the threshold. Thus, the controller can realize the emergency stop of the belt conveyor. The adjustable bracket 8 can adjust the telescopic rod according to the height of different goods, thereby adjusting the height of the robotic arm switch 6 and the infrared switch 7.

[0031] The above embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.

Claims

1. A safety device for emergency stop of a belt conveyor, comprising a conveyor belt, a head pulley, a tail pulley, a support roller, and a tensioning device, wherein the conveyor belt is fitted onto the head pulley and the tail pulley, the support roller is disposed on the lower contact surface of the conveyor belt to support its transport, and the tensioning device is disposed at the tensioning point of the tail pulley conveyor belt, characterized in that... It also includes a controller, a robotic arm switch, an infrared switch, and an adjustable bracket. The robotic arm switch is mounted on the adjustable bracket near the tail wheel, and the opening direction of the robotic arm switch is the running direction of the belt conveyor. The infrared switch is located on the top of the adjustable bracket upstream of the robotic arm switch, and the height of the infrared switch is higher than the height of the goods being transported by the belt. The adjustable bracket is adjusted and fixed with screws and nuts to adjust and fix the telescopic rod of the adjustable bracket. The signal lines of the robotic arm switch and the infrared switch are connected to the input terminal of the controller, and the output terminal of the controller is connected to the emergency stop system of the belt conveyor.

2. The emergency stop safety device for a belt conveyor according to claim 1, characterized in that, The robotic arm switches are symmetrically arranged on adjustable brackets on both sides of the belt. Each robotic arm switch is equipped with a robotic arm, the length of which is 1 / 3 to 1 / 2 of the width of the belt conveyor frame. The one-way opening direction is the running direction of the belt conveyor, and the disconnection method is axial rotation.

3. The emergency stop safety device for a belt conveyor according to claim 2, characterized in that, The robotic arm can rotate at an angle of 0 to 90°.

4. The emergency stop safety device for a belt conveyor according to claim 1, characterized in that, The infrared switch includes an infrared transmitter and an infrared receiver, which are symmetrically arranged on adjustable brackets on both sides of the belt.

5. The emergency stop safety device for a belt conveyor according to claim 1, characterized in that, The height of the adjustable bracket is 0-300mm higher than the height of the conveyor belt surface. The lowest point of the telescopic rod of the adjustable bracket is 50-150mm higher than the conveyor belt surface, and the highest point of the telescopic rod of the adjustable bracket is not higher than 250-350mm higher than the conveyor belt surface.

6. The emergency stop safety device for a belt conveyor according to claim 1, characterized in that, The adjustable bracket for the infrared switch is positioned at a location greater than the belt speed * switch response time + 3m.

7. The emergency stop safety device for a belt conveyor according to claim 1, characterized in that, It also includes a tension sensor, which is mounted on the tensioning device, and the signal line of the tension sensor is connected to the analog input terminal of the controller.

Images