A bidirectional tunneling belt intelligent tensioning device

Abstract

The present invention provides an intelligent tensioning device for a bidirectional excavation belt, which relates to the technical field of conveyor belt tensioning equipment. The tensioning device is added with a pressure sensor, which is installed on the mounting seats of the redirecting rollers at both ends of the bidirectional excavation belt and is electrically connected to a tensioning control cabinet. The downward pressure of the redirecting roller is measured, and then the angle between the center of gravity of the conveyor belt and the redirecting roller is converted to decompose the pressure F into tension along the belt direction. The pressure sensor transmits the measured data and the tension sensor transmits the measured data to the tensioning control cabinet for conversion, and finally obtains the tensioning force data of the belt, that is, realizes the detection of the tensioning force of multiple points, can more accurately and timely respond to the change of the tensioning force during the operation of the belt, and provide a stable tensioning force for the belt, thereby overcoming the defect that the belt is easy to slip due to the rapid change of the belt tensioning force.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor belt tensioning equipment, and in particular to a bidirectional tunneling belt intelligent tensioning device. Background Art

[0002] Belt conveyor is a material transportation machine designed based on the friction drive principle. It has the advantages of large transportation capacity, high reliability, easy use and maintenance, and the ability to achieve long-distance and continuous transportation. It is widely used in places such as horizontal tunnels in mining areas, up and down hills in mining areas, large transportation tunnels and wellhead transportation corridors, and has become one of the key transportation equipment in coal mine production.

[0003] The tensioning device is a key component of a belt conveyor. Excessive tension can lead to problems such as belt breakage, while insufficient tension can cause the belt to become loose and difficult to start, or increase friction between the belt and the pulleys and idlers during operation, leading to belt fires. Traditional mechanical fixed tensioning and hydraulic tensioning both require manual tensioning before the belt is started. This manual tensioning method not only consumes a lot of manpower, but also suffers from inexperienced operators. The tensioning force may be too high or too low, adversely affecting the normal operation of the belt. For long-distance belt conveyors, in order to achieve better tensioning force, motors, gear reducers, and winding disk mechanisms are often used to tension the belt. However, for this method of tensioning using ordinary motors, since the output torque of the motor cannot be changed, the tensioning force that can be achieved is a fixed value and cannot be tensioned in real time according to the state of the belt.

[0004] Currently, most existing intelligent tensioning devices are used for ordinary belt conveyors and have a relatively simple tensioning force detection function. However, for special belt conveyors used in bidirectional tunneling, the belt length has been significantly increased, and the required tensioning force has also increased. This requires multiple points of detection for tensioning force. Therefore, there is an urgent need for an intelligent belt tensioning device for bidirectional tunneling belt conveyors in China that can automatically adjust the tensioning force and achieve high tensioning efficiency. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a bidirectional tunneling belt intelligent tensioning device to solve the technical problem that the intelligent tensioning equipment in the prior art is mostly used for ordinary belt conveyors and the detection of tensioning force is relatively simple. For special bidirectional tunneling belt conveyors, since the length of the belt is greatly increased, the required tensioning force is also increased, and the use of ordinary intelligent tensioning equipment cannot effectively and timely self-adjust the tensioning force.

[0006] In order to provide the above-mentioned purpose, the present invention provides an intelligent tensioning device for a bidirectional excavation belt, comprising a power mechanism, a tensioning control cabinet, a tensioning trolley and a steel wire rope. The tensioning control cabinet is control-connected to the power mechanism, the tensioning trolley is connected to the redirecting roller of the belt storage bin, the power mechanism is driven and connected to the tensioning trolley through the steel wire rope, a tension sensor is provided at the end of the steel wire rope, the tensioning control cabinet is electrically connected to the tension sensor, and also includes a pressure sensor, the pressure sensor is installed on the mounting seats of the redirecting rollers at both ends of the bidirectional excavation belt, and is electrically connected to the tensioning control cabinet, the tensioning control cabinet cooperates with the tension sensor and the pressure sensor to control the belt tensioning according to the change of tensioning force.

[0007] According to an optional embodiment, the tensioning control cabinet is connected to the pressure sensor via a signal line.

[0008] According to an optional embodiment, the tensioning control cabinet is connected to the tension sensor via a signal line.

[0009] According to an optional embodiment, the power mechanism includes a frequency converter, a motor and a coupling, the tensioning control cabinet is connected to the frequency converter via a signal line, the frequency converter is connected to the input end of the motor via a power line, and the output end of the motor is drive-connected to the coupling.

[0010] According to an optional embodiment, a winding disk mechanism is installed on the coupling, one end of the wire rope is wound on the winding disk mechanism, and the other end of the wire rope is installed on a tensioning and fixing bracket.

[0011] According to an optional embodiment, a fixed support is provided on the tensioning fixing bracket, the other end of the steel wire rope is mounted on the fixed support, and the tension sensor is mounted between the other end of the steel wire rope and the fixed support.

[0012] According to an optional embodiment, the tensioning trolley is provided with a plurality of tensioning movable pulleys, the tensioning fixed bracket is fixedly provided with a plurality of tensioning fixed pulleys, and the wire rope passes through the tensioning movable pulleys and the tensioning fixed pulleys in sequence.

[0013] According to an optional embodiment, the projection of the tensioning fixed pulley on the tensioning trolley is located between two adjacent tensioning movable pulleys.

[0014] According to an optional embodiment, the tensioning control cabinet is provided with a display screen for timely displaying the tensioning force.

[0015] The bidirectional tunneling belt intelligent tensioning device provided by the present invention has the following technical effects:

[0016] Compared with the traditional intelligent belt tensioning device, this kind of bidirectional tunneling belt intelligent tensioning device has the same characteristics as the traditional belt intelligent tensioning device, which includes a power mechanism, a tensioning control cabinet, a tensioning trolley and a wire rope. The tensioning control cabinet is connected to the power mechanism control, the tensioning trolley is connected to the redirecting roller of the belt storage bin, the power mechanism is connected to the tensioning trolley through a wire rope, a tension sensor is provided at the end of the wire rope, and the tensioning control cabinet is electrically connected to the tension sensor. The difference is that the belt intelligent tensioning device of the present invention adds a pressure sensor, which is installed on the mounting seat of the redirecting roller at both ends of the bidirectional tunneling belt, and It is also electrically connected to the tensioning control cabinet. By measuring the downward pressure of the redirecting roller and then converting the angle between the conveyor belt and the center of gravity of the redirecting roller, the pressure F is decomposed into tension along the belt direction. The pressure sensor transmits the measured data and the tension sensor transmits the measured data to the tensioning control cabinet for conversion, and finally obtains the belt tensioning force data, that is, realizes the detection of tensioning force at multiple points, can more accurately and timely respond to the change of belt tension during operation, provide stable belt tensioning force, and overcome the defect of belt slipping caused by too fast change of belt tensioning force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a bidirectional tunneling belt intelligent tensioning device according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of part of the structure of the intelligent tensioning device for the bidirectional tunneling belt.

[0020] in, Figure 1-Figure 2 :

[0021] 1. Tensioning movable pulley; 2. Wire rope; 3. Tensioning trolley; 4. Winding disc mechanism; 5. Coupling; 6. Power line; 7. Tension sensor; 8. Fixed support; 9. Tensioning fixed pulley; 10. Tensioning fixed bracket; 11. Motor; 12. Frequency converter; 13. Tensioning control cabinet; 14. Signal line; 15. Mounting seat; 16. Redirection roller; 17. Pressure sensor; 18. Mounting seat; 19. Redirection roller; 20. Pressure sensor; 21. Tensioning fixed pulley; 22. Tensioning movable pulley; 23. Tensioning movable pulley; 24. Signal line; 25. Signal line; 26. Redirection roller; 27. Belt. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0023] An embodiment of the present invention provides a bidirectional tunneling belt intelligent tensioning device, see Figure 1 and Figure 2 As shown, it includes a motor 11, a coupling 5, a winding disc mechanism 4 connected to the coupling 5, a wire rope 2, a tensioning trolley 3, a tension sensor 7, a frequency converter 12, a tensioning control cabinet 13, pressure sensors 20, 17, tensioning movable pulleys 23, 22, 1, a tensioning fixed bracket 10, a fixed support 8 and tensioning fixed pulleys 21, 9, signal lines 25, 24, 14, and a power line 6.

[0024] Among them, the tension sensor 7 and the pressure sensor 20 are common products in the prior art. In a specific embodiment, their models can be KWT1B140 and FST100-1124 respectively.

[0025] Continue to see Figure 1 As shown, the motor 11 is a permanent magnet variable frequency motor. The input end of the motor 11 is directly connected to the frequency converter 12 through the power line 6, and the output end of the motor 11 is connected to the coupling 5. The coupling 5 is equipped with a winding disk mechanism 4. One end of the wire rope 2 is directly connected to the winding disk mechanism 4, and the other end of the wire rope 2 is connected to the fixed support 8 on the tensioning fixed bracket 10 through the tensioning movable pulley 1, the tensioning fixed pulley 21, the tensioning movable pulley 22, the tensioning fixed pulley 9, and the tensioning movable pulley 23 in sequence. The tension sensor 7 is installed between the end of the wire rope 2 and the fixed support 8.

[0026] Continue to see Figure 1 As shown, the tensioning control cabinet 13 is connected to the frequency converter 12 , the tensioning control cabinet 13 controls the frequency converter 12 through a signal line 25 , the tensioning control cabinet 13 is connected to the tension sensor 7 through a signal line 24 , and the tensioning control cabinet 13 is connected to the pressure sensors 20 , 17 through a signal line 14 .

[0027] Continue to see Figure 1 As shown, there are two pressure sensors 20, 17, one of which is mounted on the mounting base 15 of the redirecting drum 16 at one end of the bidirectional excavation belt 27, and the other is mounted on the mounting base 18 of the redirecting drum 19 at the other end of the bidirectional excavation belt 27.

[0028] The tensioning control cabinet 13 houses a PLC controller, and the tension sensor 7 directly measures the tension. Because the bidirectional excavation belt 27 is long, equivalent to two excavation belts 27, the tension sensor 7 on the tensioning trolley 3 alone cannot accurately measure the tension on the belt 27. Therefore, pressure sensors 17 and 20 are installed on the mounting brackets 15 and 18 of the reversing rollers 16 and 19 at both ends of the bidirectional excavation belt 27. These sensors measure the downward pressure on the reversing rollers 16 and 19 and convert the pressure F pressure into the tension F tension along the belt 27, using the angle θ between the belt 27 and the center of gravity of the reversing rollers 16 and 19. This pressure is converted into the tension F tension along the belt 27, i.e., F tension = F pressure * cos θ. The pressure sensors 17 and 20 transmit the measured data to the tensioning control cabinet 13 for conversion. Together with the tension sensor 7, the tension on the belt 27 is ultimately determined.

[0029] Such as 1 and Figure 2 As shown, before belt 27 is put into operation, the tensioning control cabinet 13 receives a start signal from belt 27. It then controls the power output of the frequency converter 12 according to the set tension force, starts the motor 11, and tensions the steel wire rope 2, driving the tensioning trolley 3 for tensioning. The redirecting drum 26 on the belt storage bin is mounted on the tensioning trolley 3. The steel wire rope 2 pulls the tensioning trolley 3, driving the redirecting drum 26 on the belt storage bin to move, thereby tensioning belt 27 and maintaining the tension force within the set range.

[0030] When the tension F, calculated by converting the values ​​returned by tension sensor 7 and pressure sensors 17 and 20, reaches the desired tension, inverter 12 and motor 11 are stopped, allowing belt 27 to maintain the set tension before starting. If the belt 27 tension is detected to be excessive, tension control cabinet 13 controls inverter 12 to reverse motor 11, loosening the belt and maintaining the tension within the set range. If the belt 27 tension is detected to be insufficient, tension control cabinet 13 controls inverter 12 to increase motor 11 output. This intelligent tensioning device automatically adjusts the tension based on the belt 27 tension.

[0031] The bidirectional tunneling belt intelligent tensioning device of this invention is highly intelligent and responsive, rapidly reacting to changes in belt tension during operation, providing stable belt tension. The tensioning control cabinet 13 is also equipped with a display that displays the tension in real time, facilitating operation. Multiple communication interfaces facilitate data exchange with the main control unit for belt 27 and monitoring rooms, facilitating data storage and upload.

[0032] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A bidirectional tunneling belt intelligent tensioning device, comprising a power mechanism, a tensioning control cabinet, a tensioning trolley, and a steel wire rope. The tensioning control cabinet is control-connected to the power mechanism, the tensioning trolley is connected to the redirecting roller of the belt storage bin, the power mechanism is driven and connected to the tensioning trolley via the steel wire rope, a tension sensor is provided at the end of the steel wire rope, and the tensioning control cabinet is electrically connected to the tension sensor. The device is characterized in that: It also includes a pressure sensor, which is installed on the mounting base of the redirecting roller at both ends of the bidirectional tunneling belt and is electrically connected to the tensioning control cabinet. The tensioning control cabinet converts the value returned by the tension sensor and the value returned by the pressure sensor to obtain the belt tensioning force data. The tensioning control cabinet cooperates with the tension sensor and the pressure sensor to control the belt tensioning at any time according to the changes in the tensioning force data.

2. The bidirectional tunneling belt intelligent tensioning device according to claim 1 is characterized in that: The tensioning control cabinet is connected to the pressure sensor via a signal line.

3. The bidirectional tunneling belt intelligent tensioning device according to claim 1 is characterized in that: The tension control cabinet is connected to the tension sensor via a signal line.

4. The bidirectional tunneling belt intelligent tensioning device according to claim 1 is characterized in that: The power mechanism includes a frequency converter, a motor and a coupling. The tensioning control cabinet is connected to the frequency converter via a signal line. The frequency converter is connected to the input end of the motor via a power line. The output end of the motor is drive-connected to the coupling.

5. The bidirectional tunneling belt intelligent tensioning device according to claim 4 is characterized in that: A winding disc mechanism is installed on the coupling, one end of the steel wire rope is wound on the winding disc mechanism, and the other end of the steel wire rope is installed on a tensioning and fixing bracket.

6. The bidirectional tunneling belt intelligent tensioning device according to claim 5, characterized in that: A fixed support is provided on the tensioning fixing bracket, the other end of the steel wire rope is installed on the fixed support, and the tension sensor is installed between the other end of the steel wire rope and the fixed support.

7. The bidirectional tunneling belt intelligent tensioning device according to claim 5, characterized in that: The tensioning trolley is provided with a plurality of tensioning movable pulleys, and the tensioning fixed bracket is fixedly provided with a plurality of tensioning fixed pulleys. The steel wire rope passes through the tensioning movable pulley and the tensioning fixed pulley in sequence.

8. The bidirectional tunneling belt intelligent tensioning device according to claim 7, characterized in that: The projection of the tensioning fixed pulley on the tensioning trolley is located between two adjacent tensioning movable pulleys.

9. The bidirectional tunneling belt intelligent tensioning device according to any one of claims 1 to 8, characterized in that: The tensioning control cabinet is provided with a display screen for timely displaying the tensioning force.

Images