On-line monitoring tube expansion prevention protection device for round tube belt conveyor

Abstract

The utility model provides an on-line monitoring tube expansion prevention protection device for a round tube belt conveyor, and belongs to the technical field of conveyors. The online monitoring tube expansion prevention protection device for the circular tube belt conveyor comprises ultrasonic directional transmitters and ultrasonic directional receivers, the ultrasonic directional transmitters and the ultrasonic directional receivers are arranged on the two sides of the circular tube belt conveyor respectively, the number of the ultrasonic directional transmitters and the number of the ultrasonic directional receivers on each side are both two, and the number of the ultrasonic directional transmitters and the number of the ultrasonic directional receivers on each side are both two. The ultrasonic directional transmitter and the ultrasonic directional receiver which are in the opposite state are at the same height, and the ultrasonic directional transmitter, the ultrasonic directional receiver, the coal feeder and the round pipe belt conveyor are all connected with a round pipe belt conveyor PLC. According to the utility model, directional sound wave transmission and feedback receiving are combined with PLC control of the circular tube belt conveyor, so that the device has the advantages that the accumulation condition of materials in the rubber belt in the running and conveying process can be monitored on line in real time, and tube expansion is prevented fundamentally.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyors, and particularly relates to an on-line monitoring and anti-expansion pipe protection device for a circular pipe belt conveyor. Background Technique

[0002] During the daily operation of the circular pipe belt conveyor for conveying materials, at the flat and vertical arc-changing sections of the operation line, especially when the arc section of the operation line is in a "U" shape, the lowest point is extremely prone to pipe expansion. At the feeding point of the tail of the circular pipe belt conveyor, pipe expansion is also likely to occur due to uneven feeding.

[0003] After pipe expansion occurs, the ejected materials wrap the belt, and the kinetic energy of the materials is relatively large, which can cause harm to surrounding equipment and on-site workers. Since most circular pipe belt conveyors are used for long-distance and high-speed material transportation, it is difficult to conduct a comprehensive daily inspection. How to effectively prevent the occurrence of pipe expansion during operation and ensure the safe operation and transportation of the circular pipe belt conveyor has always been the direction explored by engineering personnel in the circular pipe belt conveyor industry.

[0004] At present, the existing anti-expansion pipe devices for circular pipe belt conveyors mainly set mechanical baffle plates at the tail. For example, the patent with the publication number CN218490589U provides a "pipe belt conveyor anti-expansion pipe device", which can effectively control the filling rate and prevent pipe expansion caused by individual large-grained materials entering the circular pipe belt conveyor. After the materials are piled up behind the baffle plate, the materials can still enter the conveyor belt from both sides and the upper part of the baffle plate, resulting in pipe expansion.

[0005] The patent with the publication number CN217919735U provides a "pipe belt machine with an anti-expansion pipe device", and the disclosed content is "pushing the materials at the pipe expansion part to other positions to slow down the degree of pipe expansion, and then waiting for the operator to come for further treatment of the pipe belt machine body".

[0006] The above-mentioned existing technologies do not fundamentally solve the problem of pipe expansion in circular pipe belt conveyors, cannot effectively monitor the accumulation of materials inside the belt, and have their own limitations. Content of the Utility Model

[0007] To solve the above technical problems, the utility model proposes an on-line monitoring and anti-expansion pipe protection device for a circular pipe belt conveyor that can fundamentally prevent the occurrence of pipe expansion.

[0008] The technical solution of the utility model is realized as follows:

[0009] An on-line monitoring and anti-expansion protection device for a circular pipe belt conveyor, comprising an ultrasonic directional transmitter and an ultrasonic directional receiver. The ultrasonic directional transmitter and the ultrasonic directional receiver are respectively arranged on both sides of the circular pipe belt conveyor. There are two ultrasonic directional transmitters and two directional receivers on each side, and the ultrasonic directional transmitter and the ultrasonic directional receiver in the opposite state are at the same height. The ultrasonic directional transmitter, the ultrasonic directional receiver, the coal feeder and the circular pipe belt conveyor are all connected to the circular pipe belt conveyor PLC.

[0010] Furthermore, set the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver located above so that the height of the sound wave between the two corresponds to the maximum height of the material accumulation when the belt expands.

[0011] Furthermore, set the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver located below so that the height of the sound wave between the two corresponds to the maximum height of the material accumulation when the belt does not expand.

[0012] Furthermore, adjustable brackets can be installed on both sides of the truss window plate of the circular pipe belt conveyor. The ultrasonic directional transmitter and the ultrasonic directional receiver are respectively installed on the adjustable brackets on both sides of the truss window plate, and the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver on the adjustable brackets can be adjusted.

[0013] The utility model has the following beneficial effects:

[0014] 1. This application adopts directional sound wave transmission and reception feedback, combined with the circular pipe belt conveyor PLC control, can on-line and real-time monitor the material accumulation situation inside the belt during the operation and transportation process, and fundamentally prevent the occurrence of expansion.

[0015] 2. This application applies two pairs of ultrasonic directional transmitters and ultrasonic directional receivers, which are respectively installed on the adjustable brackets on both sides of the truss window plate of the circular pipe belt conveyor, and the installation method of this bracket has the function of adjusting the installation distance between the ultrasonic directional transmitter and the ultrasonic directional receiver up and down. A certain distance is reserved between the two pairs of ultrasonic directional transmitters and ultrasonic directional receivers, which can meet the conveying requirements of different material particle sizes and ensure the accurate monitoring of the system. Brief Description of the Drawings

[0016] Figure 1 It is a system diagram of the on-line monitoring and anti-expansion protection device for the circular pipe belt conveyor of the utility model;

[0017] Figure 2 It is a schematic diagram of the circular pipe belt conveyor of the utility model during normal conveying;

[0018] Figure 3 It is a schematic diagram of the circular pipe belt conveyor of the utility model during abnormal conveying;

[0019] Figure 4 This is a schematic diagram of the circular pipe belt conveyor of the present utility model during warning transportation;

[0020] Figure 5 This is a schematic diagram of the circular pipe belt conveyor of the present utility model during over-limit transportation. Specific embodiments

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figures 1 to 5 shown, a typical embodiment of the present utility model provides an on-line monitoring and anti-expansion pipe protection device for a circular pipe belt conveyor, which includes an ultrasonic directional transmitter 2 and an ultrasonic directional receiver 3. The ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 are respectively arranged on both sides of the circular pipe belt conveyor 9. There are two ultrasonic directional transmitters 2 and directional receivers on each side, and the ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 in the opposite state are at the same height. The ultrasonic directional transmitter 2, the ultrasonic directional receiver 3, the coal feeder 8, and the circular pipe belt conveyor 9 are all connected to the circular pipe belt conveyor PLC 7.

[0023] Set the heights of the ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 located above so that the height where the sound wave is located between the two corresponds to the maximum height of the material 5 accumulation when the belt 4 expands.

[0024] Set the heights of the ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 located below so that the height where the sound wave is located between the two corresponds to the maximum height of the material 5 accumulation when the belt 4 does not expand.

[0025] Adjustable brackets 1 can be installed on both sides of the truss window plate of the circular pipe belt conveyor 9. The ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 are respectively installed on the adjustable brackets 1 on both sides of the truss window plate, and the heights of the ultrasonic directional transmitter 2 and the ultrasonic directional receiver 3 on the adjustable brackets 1 can be adjusted.

[0026] When applying this embodiment:

[0027] The coal feeder 8, the round tube belt conveyor 9 and the round tube belt conveyor PLC7 are connected to ensure the interlocking control relationship between the round tube belt conveyor PLC7, the coal feeder 8 and the round tube belt conveyor 9. When the round tube belt conveyor 9 conveys the material 5, the belt 4 becomes round under the extrusion of the roller 6, and the material 5 is wrapped in the belt 4 for transportation.

[0028] like Figure 2 As shown, during operation, when the material 5 is wrapped and piled in the tape 4 and the filling rate does not exceed 75%, the ultrasonic directional transmitter 2 at the A and B ends emits sound waves, and the ultrasonic directional receiver 3 at the A and B ends receives the feedback signal. The distance between the transmitting end and the receiving end and the propagation medium are the same, so the time to receive the feedback signal is the same V A Normal = V B Normal, the signal feedback receiving time at this time is set as the system protection operation parameter. The round tube belt conveyor PLC7 is set to no tube expansion and the system operates normally.

[0029] like Figure 3 As shown, during the operation, when the filling rate of the material 5 wrapped in the tape 4 fluctuates around 75% or the particle size of the local material 5 is larger than 75% filling rate, when the ultrasonic directional transmitter 2 at both ends A and B emits sound waves, the ultrasonic directional receiver 3 at both ends A and B receives the feedback signal at different times. At this time, the time V for receiving the signal A <V A Normal, because the tape 4 wraps the material 5 and fluctuates around 75%, so the V A The signal feedback time also fluctuates up and down and does not tend to be stable. B Normally, it is always within the normal range. The PLC7 of the round tube belt conveyor is set to no tube expansion and the system operates normally.

[0030] like Figure 4 As shown, during the operation, when the material 5 is wrapped and piled in the tape 4 and the filling rate exceeds 75% but not more than 80%, the ultrasonic directional transmitters 2 at the A and B ends generate sound waves, and the ultrasonic directional receivers 3 at the A and B ends receive the feedback signal at different times. Due to the accumulation of material 5 at the A end, the time V for receiving the signal at this time is A <V A Normal and the time has been stable. The time taken by the B terminal to receive the signal is equal to V B Normally, it is always within the normal range. The PLC7 of the tube belt conveyor is set to issue an accumulation alarm, and the control center of the tube belt conveyor 9 performs manual control to reduce the feeding speed of the coal feeder 8 or increase the belt speed of the tube belt conveyor 9. A Feedback until V A Normal, the circular tube belt conveyor PLC7 clears the alarm and the system operates normally.

[0031] likeFigure 5 As shown, during operation, when the material 5 accumulates and wraps in the belt 4 exceeding the filling rate of 80%, the accumulation position of the material 5 exceeds the ultrasonic directional transmitters 2 and the ultrasonic directional receivers 3 arranged at both ends A and B. Since the materials wrapped in the belt 4 are the same, the time taken for the ultrasonic directional receiver 3 to receive the feedback signal is V A =V B and <V A normal, V B normal. The PLC 7 of the circular pipe belt conveyor determines that the material 5 wrapped and conveyed by the belt 4 exceeds the limit, and emergently brakes the circular pipe belt conveyor 9 to stop, avoiding tube expansion in the system.

[0032] Furthermore, this embodiment can solve the on-line operation process monitoring and protection of the circular pipe belt conveyor 9 when the filling rate of the material 5 in the belt 4 exceeds 75% during daily production, resulting in tube expansion. The directional ultrasonic transmitter 2 and the ultrasonic directional receiver 3 are arranged on both sides of the truss of the circular pipe belt conveyor 9. By utilizing the different propagation speeds of sound waves in different media, according to the time when the receiving end receives the sound wave feedback signal, the PLC 7 of the circular pipe belt conveyor determines whether the accumulation and filling of the material 5 inside the circular pipe belt conveyor 9 are normal, monitors in real time and avoids tube expansion, protecting the normal operation of the circular pipe belt conveyor 9. The structure is compact, the installation is simple, and it can be installed at the parts prone to tube expansion according to the actual working conditions on site for the monitoring and protection of daily production.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-line monitoring and anti-expansion protection device for a circular pipe belt conveyor, characterized in that, It includes an ultrasonic directional transmitter and an ultrasonic directional receiver. The ultrasonic directional transmitter and the ultrasonic directional receiver are respectively arranged on both sides of the circular pipe belt conveyor. There are two ultrasonic directional transmitters and two ultrasonic directional receivers on each side, and the ultrasonic directional transmitter and the ultrasonic directional receiver in the opposite state are at the same height. The ultrasonic directional transmitter, the ultrasonic directional receiver, the coal feeder, and the circular pipe belt conveyor are all connected to the circular pipe belt conveyor PLC.

2. The online monitoring and anti-expansion tube protection device for a circular pipe belt conveyor according to claim 1, wherein Set the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver located above so that the height of the sound wave between the two corresponds to the maximum height of the material accumulation when the belt is expanded.

3. An on-line monitoring and anti-expansion tube protection device for a circular pipe belt conveyor according to claim 1, characterized in that, Set the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver located below so that the height of the sound wave between the two corresponds to the maximum height of the material accumulation when the belt is not expanded.

4. An on-line monitoring and anti-expansion tube protection device for a circular pipe belt conveyor according to claim 1, characterized in that, Adjustable brackets can be installed on both sides of the truss window plate of the circular pipe belt conveyor. The ultrasonic directional transmitter and the ultrasonic directional receiver are respectively installed on the adjustable brackets on both sides of the truss window plate, and the heights of the ultrasonic directional transmitter and the ultrasonic directional receiver on the adjustable brackets can be adjusted.

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