Monitoring device of tubular belt conveyor and method for monitoring pipe collapse

Abstract

The invention discloses a monitoring device and a monitoring method of a tubular belt conveyor. The monitoring device comprises a frame (1); the fixed carrier roller frame (6) is fixed on the frame (1) and is provided with a carrier roller (9); the movable carrier roller frame (2) is elastically connected to the fixed carrier roller frame (6) and is provided with a carrier roller (9); an interlayer space is formed by the fixed carrier roller frame (6) and the movable carrier roller frame (2); when the conveyor conveys materials, a carrier roller of the movable carrier roller frame (2) and a carrier roller of the fixed carrier roller frame (6) can abut against a tubular conveying belt, so that the tubular conveying belt passes through the interlayer space. And the sensor is arranged on the frame (1), is positioned above the movable carrier roller frame (2) and is used for sensing the displacement change of the movable carrier roller frame (2).

Description

Technical Field

[0001] The present invention relates to the technical field of tubular belt conveyors; in particular, the present invention relates to a monitoring device for a tubular belt conveyor and a method for monitoring collapsed pipes. Background Art

[0002] Tubular belt conveyor is a new type of conveyor, which has the characteristics of both pipeline conveying and belt conveying. In the operating area, the belt can be closed into a circular tube by itself, and only unfolded into a plane in the receiving area and unloading area. It can be used to convey various block and powder materials, such as coal, ore, grain, cement, pulp and concrete. It can convey large inclination angle and small curvature radius, which is convenient for long-distance off-road transportation in complex terrain with steep slopes and many turns along the line. It has the characteristics of small cross-sectional area of ​​the fuselage, which is convenient for three-dimensional space bending transportation in complex terrain.

[0003] Since the conveying pipe of the tubular belt conveyor is formed by forcibly curling the belt using a polygonal roller group arranged at a certain interval, its conveying pipe has stronger lateral rigidity than the ordinary belt conveyor belt. After long-term operation, the lateral rigidity of the belt decreases due to belt aging, increased load, and long-term shutdown, which easily leads to belt collapse. When a pipe collapse accident occurs, the conveyor may be shut down for up to a week, and there is a huge safety risk.

[0004] The existing protection devices for tubular belt conveyors are usually for protection against expansion of the tube, and are mainly used to monitor the problem of overfilling during use. However, they are ineffective for protecting the tubular belt conveyor from tube collapse when it is running in turns and arcs, and there is still a lack of effective technical means to reduce the losses caused by tube collapse.

[0005] According to the on-site use of tubular belt conveyors, different solutions will be considered in the design stage to avoid pipe collapse. However, due to on-site installation, commissioning and conveyor belt life, tubular belt conveyors are prone to pipe collapse after running for a period of time. When an accident occurs, the tensioning device needs to be loosened and the conveyor belt needs to be gradually restored. This usually takes a lot of time and may cause a week of downtime in serious cases. Summary of the invention

[0006] In view of this, the present invention provides a monitoring device for a tubular belt conveyor and a method for monitoring collapsed pipes, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] In order to achieve the aforementioned objectives, the first aspect of the present invention provides a monitoring device for a tubular belt conveyor, comprising: a frame; a fixed roller frame equipped with rollers, fixed to the frame; a movable roller frame equipped with rollers, elastically connected to the fixed roller frame; the fixed roller frame and the movable roller frame form an interlayer space; when the conveyor conveys materials, the rollers of the movable roller frame and the rollers of the fixed roller frame can contact the tubular conveyor belt, so that the tubular conveyor belt passes through the interlayer space; and a sensor, which is arranged on the frame, located above the movable roller frame, to sense the displacement change of the movable roller frame.

[0008] In the monitoring device as described above, optionally, the sensor is a limit switch, and the limit switch monitors the travel of the movable roller frame.

[0009] In the monitoring device as described above, optionally, the movable roller frame is elastically connected to the fixed roller frame through multiple springs, so that when the conveyor transports materials, the rollers of the movable roller frame use the elastic force of the springs to resist the tubular conveyor belt.

[0010] In the monitoring device as described above, optionally, it also includes multiple guide rods, one end of each guide rod is fixed to the fixed roller frame, and the other end passes through the spring and the movable roller frame in sequence and is detachably connected to an end at the end, and the end can abut against the movable roller frame.

[0011] In the monitoring device as described above, optionally, it also includes a controller, which is configured to receive the signal of the sensor and the current signal of the frequency converter of the conveyor; when the received signal shows that the displacement of the movable roller frame is greater than or equal to the set threshold, and the received current signal shows that the current is rising, it is judged that the monitoring position is in a collapsed pipe state; when the received signal shows that the displacement of the movable roller frame is greater than or equal to the set threshold, and the received current signal has not changed, it is judged that the monitoring position is in a warning state.

[0012] In the monitoring device as described above, optionally, it also includes a pipe collapse alarm device connected to the controller, and the controller is configured to be connected to the emergency stop device of the conveyor motor; when it is determined that the monitoring position is in a pipe collapse state: the controller is configured to send a signal to the pipe collapse alarm device to prompt the staff to intervene; if the staff fails to intervene effectively and the scope of the pipe collapse expands, the controller sends a signal to the pipe collapse alarm device, and the pipe collapse alarm device continuously issues multiple alarms; if the staff fails to intervene effectively and the scope of the pipe collapse expands, the controller sends a signal to the emergency stop device of the conveyor motor, so that the conveyor is shut down.

[0013] In the monitoring device as described above, optionally, a pipe collapse warning device connected to the controller is also included; when it is determined that the monitored position is in a warning state: a signal is sent to the pipe collapse warning device to prompt the staff to conduct monitoring and verification.

[0014] To achieve the aforementioned purpose, the second aspect of the present invention provides a method for monitoring pipe collapse, which is used for a tubular belt conveyor, and the conveyor is equipped with any one of the monitoring devices described above, and the method includes: receiving a signal from a sensor and receiving a current signal from a frequency converter of the conveyor; when the received signal from the sensor shows that the displacement of the movable roller frame is greater than or equal to a set threshold, and the received current signal shows that the current is rising, it is judged that the monitored position is in a pipe collapse state; when the received signal from the sensor shows that the displacement of the movable roller frame is greater than or equal to a set threshold, and the received current signal has not changed, it is judged that the monitored position is in a warning state.

[0015] In the method described above, optionally, the monitoring device includes a controller and a pipe collapse alarm device respectively connected to the controller. The method, used for the controller, includes: when it is determined that the monitored position is in a pipe collapse state, sending a signal to the pipe collapse alarm device to prompt the staff to intervene; if the staff fails to intervene effectively, the scope of the pipe collapse expands, and a signal is sent to the pipe collapse alarm device, so that the pipe alarm device issues an alarm multiple times; sending a signal to the emergency stop device of the conveyor motor to shut down the conveyor.

[0016] In the method described above, optionally, the monitoring device includes a pipe collapse warning device connected to the controller. The method, used for the controller, includes: when it is determined that the monitoring position is in a warning state, sending a signal to the pipe collapse warning device to prompt the staff to conduct monitoring and verification.

[0017] The monitoring device for the tubular belt conveyor of the present invention can monitor whether a pipe collapses at a monitoring position, saves time and effort during installation and adjustment, and reduces the maintenance time of the tubular belt conveyor after a pipe collapse accident.

[0018] The monitoring device of the tubular belt conveyor of the present invention can monitor the direction of pipe collapse under different working conditions such as up, down, left, right and compound turning by adjusting the installation angle, and realize the full monitoring of the tubular belt conveyor belt pipe collapse accident. It greatly shortens the maintenance time of pipe collapse, enhances the continuity of material transportation, improves transportation efficiency, and brings huge economic benefits to production.

[0019] The present invention further provides a monitoring method, which also has the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings: Figure 1 A schematic diagram of a monitoring device according to an embodiment of the present invention; Figure 2 A schematic diagram of a control part of a monitoring device according to an embodiment of the present invention; Figure 3 A schematic flow chart of a monitoring method according to an embodiment of the present invention; Figure numerals: 1-frame; 2-movable roller frame; 3-limit switch; 4-tubular conveyor belt; 5-spring; 6-fixed roller frame; 7-controller; 8-roller pressure plate; 9-roller; 10-guide rod; 101-end; 11-frequency converter; 12-pipe collapse alarm device; 13-emergency stop device; 14-pipe collapse warning device. DETAILED DESCRIPTION

[0021] With reference to the accompanying drawings and specific embodiments, the structure, composition, characteristics and advantages of the monitoring device of the present invention will be described below in an exemplary manner. However, all descriptions should not be used to form any limitation on the present invention.

[0022] In addition, for any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature displayed or implied in the accompanying drawings, the present invention still allows for continued arbitrary combination or deletion between these technical features (or their equivalents) without any technical obstacles, and thus it should be considered that these more embodiments according to the present invention are also within the scope of the description of this document.

[0023] It should also be noted that the terms "upper" and "lower" indicate positions or location relationships based on the figures. Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0025] Figures 1 to 3 The monitoring device and monitoring method of the tubular belt conveyor according to various embodiments of the present invention are shown. like Figure 1 to Figure 2As shown, an embodiment of the present invention provides a monitoring device for a tubular belt conveyor, including a frame 1; a fixed roller frame 6, which is fixed to the frame 1 and is equipped with rollers 9; a movable roller frame 2, which is elastically connected to the fixed roller frame 6 and is equipped with rollers 9; the fixed roller frame 6 and the movable roller frame 2 form an interlayer space; when the conveyor transports materials, the rollers of the movable roller frame 2 and the rollers of the fixed roller frame 6 can contact the tubular conveyor belt, so that the tubular conveyor belt passes through the interlayer space; and a sensor, which is arranged on the frame 1, located above the movable roller frame 2, to sense the displacement change of the movable roller frame 2.

[0026] When the conveyor transports materials, the tubular conveyor belt passes through the interlayer space formed by the fixed roller frame 6 and the movable roller frame 2. The rollers of the movable roller frame 2 elastically contact the tubular conveyor belt. When the tubular belt conveyor collapses at the monitored position during operation, the tubular conveyor belt at this position deforms downward, and the rollers of the movable roller frame 2 elastically contact the tubular conveyor belt. In this way, the movable roller frame 2 also moves downward with the tubular conveyor belt 4, so that the sensor senses the displacement change of the movable roller frame 2. That is, the collapse of the tubular belt conveyor is monitored by the displacement change of the movable roller frame 2.

[0027] The frame 1 can be installed on the pipe gallery and is fixed relative to the ground. The frame 1 is a detachable, door-shaped structure, which can easily install the monitoring device on the periphery of the pipe conveyor belt.

[0028] The two ends of the shaft of the roller 9 are respectively connected by a roller pressing plate 8, and the roller 9 is bolted to the fixed roller frame 6 through the roller pressing plate 8, and the roller 9 is bolted to the movable roller frame 2 through the roller pressing plate 8.

[0029] In one embodiment, the sensor is a limit switch 3, which contacts the movable roller frame 2 to monitor the travel of the movable roller frame 2. By setting the monitoring travel of the limit switch, different triggering amounts can be set for different diameters of tubular belt conveyors, and the triggering amount can be set to 1 / 4 of the diameter, that is, the threshold value is set to 1 / 4 of the diameter. In other embodiments, the sensor can also be an infrared detector or other sensor that can monitor the travel of the movable roller frame 2, which is not limited here.

[0030] In one embodiment, the elastic connection between the movable roller frame 2 and the fixed roller frame 6 is achieved by a plurality of springs 5. The plurality of springs 5 ​​of the movable roller frame 2 are elastically connected to the fixed roller frame 6, so that when the conveyor transports materials, the rollers of the movable roller frame 2 are pressed against the tubular conveyor belt 4 by the elastic force of the springs. The plurality of springs 5 ​​can be arranged along the conveying direction of the tubular conveyor belt 4, and the plurality of springs 5 ​​are arranged on both sides of the tubular conveyor belt 4.

[0031] In another embodiment, the elastic connection between the movable roller frame 2 and the fixed roller frame 6 is realized by a plurality of springs 5 ​​and a plurality of guide rods 10, and each guide rod 10 is sleeved with a spring 5. One end of each guide rod 10 is fixed to the fixed roller frame 6, and the other end sequentially passes through the spring 5 and the movable roller frame 2 and is detachably connected (for example, connected by a thread) at the end with an end 101, and the end 101 can abut against the movable roller frame 2. The plurality of springs 5 ​​abut between the movable roller frame 2 and the fixed roller frame 6.

[0032] During the operation of the tubular belt conveyor, the tubular conveyor belt 4 collapses in the direction of the spring expansion and contraction, and the limit switch 3 detects the displacement change of the movable roller frame 2.

[0033] In one embodiment, Figure 2 As shown, the monitoring device also includes a controller 7, and the signal output end of the limit switch 3 and the current signal output end of the frequency converter 11 are connected to the signal input end of the controller 7; the controller 7 is configured to receive the signal of the limit switch 3 and the current signal of the frequency converter 11 of the conveyor; when the received signal shows that the displacement of the movable roller frame 2 is greater than or equal to the set threshold, and the received current signal shows that the current rises, it is determined that a pipe collapse occurs at the monitored position, that is, a pipe collapse state. When the received signal shows that the displacement of the movable roller frame 2 is greater than or equal to the set threshold, and the received current signal does not change, it is determined that the monitored position is in an early warning state.

[0034] In one embodiment, the threshold value is set to 1 / 4 of the diameter of the tube formed by the tubular conveyor belt.

[0035] In one embodiment, the monitoring device also includes a pipe collapse alarm device 12 connected to a controller, and the controller is configured to be connected to the emergency stop device of the conveyor motor; the signal output end of the controller 7 is respectively connected to the signal input end of the pipe collapse alarm device 12 and the tubular belt conveyor emergency stop device 13. When it is determined that a pipe collapse occurs at the monitored position, the controller is configured to send a signal to the pipe collapse alarm device to prompt the staff to intervene manually. If the staff fails to intervene effectively, the scope of the pipe collapse expands, and the controller sends a signal to the pipe collapse alarm device 12, and the pipe collapse alarm device issues multiple alarms; if the scope of the pipe collapse expands, the controller sends a signal to the emergency stop device of the conveyor motor, and the conveyor is shut down. After the staff repairs and forms the tubular conveyor belt 4 into a pipe, they start the tubular belt conveyor again.

[0036] In one embodiment, the monitoring device further comprises a pipe collapse warning device 14 connected to the controller 7; the signal output end of the controller 7 is connected to the signal input end of the pipe collapse warning device 14. When it is determined that the monitoring position is in a warning state, the controller 7 sends a signal to the pipe collapse warning device 14 to prompt the staff to conduct monitoring and verification.

[0037] The staff needs to closely monitor whether the current signal of the inverter 11 rises in a short time. At the same time, conduct on-site inspection of the monitoring device at the alarm to determine whether the error signal is caused by improper installation or failure of the limit switch 3. The warning state can be released after adjusting the monitoring device.

[0038] like Figure 1 As shown, the upper part of the figure is the outward journey of the conveyor belt, which generally transports materials and is equipped with a monitoring device, and the installation angle relative to the tubular conveyor belt is set to 0 degrees. Figure 1 In the figure, at the bottom, which is the return path of the conveyor belt, a monitoring device is also installed at an installation angle of 180 degrees relative to the tubular conveyor belt.

[0039] In actual use, the installation angle of the monitoring device of the present invention relative to the tubular conveyor belt can be adjusted to monitor the direction of the collapsed pipe under different working conditions such as up, down, left, right and compound turning, and realize the full monitoring of the tubular belt conveyor belt collapsed pipe accident. It greatly shortens the maintenance time of collapsed pipes, enhances the continuity of material transportation, improves transportation efficiency, and brings huge economic benefits to production.

[0040] When in use, the installer needs to calibrate the limit switch 3 of the monitoring device according to the actual diameter of the pipe after the conveyor belt is laid, and the monitoring of the pipe collapse accident of the tubular belt conveyor can be realized after starting. In addition, the installation and adjustment process saves time and effort, and reduces the maintenance time of the tubular belt conveyor after the pipe collapse accident.

[0041] The installation angle of the monitoring device of the present invention relative to the tubular conveyor belt can be adjusted to monitor the direction of the collapsed pipe under different working conditions such as up, down, left, right and compound turning, and realize the full monitoring of the tubular belt conveyor belt collapsed pipe accident. The collapsed pipe maintenance time is greatly shortened, the continuity of material transportation is enhanced, the transportation efficiency is improved, and huge economic benefits are brought to production.

[0042] The entire monitoring process does not require human intervention. Multiple monitoring devices along the line monitor the operation of the conveyor belt in real time and transmit the monitoring data back to the controller of the control cabinet. The controller of the control cabinet processes the data uniformly and sends an alarm signal through the corresponding control algorithm.

[0043] Tubular belt conveyors are usually used for off-road bulk material transportation. They have complex operation routes and are far from factories. As a key link in the transportation system, once a large-scale pipe collapse accident occurs, it is difficult to resume production in a short period of time. The anti-collapse monitoring device of the present invention can effectively reduce the scope of pipe collapse, improve the efficiency of the transportation system, and reduce maintenance downtime.

[0044] An embodiment of the present invention further provides a method for monitoring pipe collapse, which is used for a tubular belt conveyor, wherein the conveyor is equipped with a monitoring device of any of the above embodiments, such as Figure 3 As shown, the method includes: receiving a sensor signal and receiving a current signal of a frequency converter of a conveyor; when the received sensor signal shows that the displacement of the movable roller frame 2 is greater than or equal to a set threshold, and the received current signal shows that the current rises, it is determined that the monitored position is in a pipe collapse state; when the received sensor signal shows that the displacement of the movable roller frame 2 is greater than or equal to a set threshold, and the received current signal does not change, it is determined that the monitored position is in an early warning state. When the received sensor signal shows that the displacement of the movable roller frame 2 is less than the set threshold, it is determined that no pipe collapse occurs at the monitored position.

[0045] In one embodiment, the monitoring device includes a controller 4 and a pipe collapse alarm device 12 respectively connected to the controller 4. The method is used for the controller 7, including: when it is determined that the monitored position is in a pipe collapse state, a signal is sent to the pipe collapse alarm device 12 to prompt the staff to intervene. If the staff fails to intervene effectively, the scope of the pipe collapse is expanded, and a signal is sent to the pipe collapse alarm device 12, so that the pipe collapse alarm device issues an alarm multiple times; a signal is sent to the emergency stop device of the conveyor motor, so that the conveyor is shut down.

[0046] In one embodiment, the monitoring device includes a pipe collapse warning device 14 connected to the controller, and the method, used in the controller, includes: when it is determined that the monitoring position is in a warning state, a signal is sent to the pipe collapse warning device 14 to prompt the staff to conduct a detection and verification. The staff needs to closely monitor whether the current signal of the inverter 11 rises in a short time. At the same time, an on-site inspection is carried out on the monitoring device at the alarm to determine whether the error signal is caused by improper installation or failure of the limit switch 3. The warning state can be released after adjusting the monitoring device.

[0047] The present invention provides a monitoring device and a monitoring method for a tubular belt conveyor. When a small-scale pipe collapse accident occurs during the operation of the tubular belt conveyor, the staff can obtain feedback information in the first time and take emergency shutdown measures to avoid long-term shutdown problems.

[0048] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A monitoring device for a tubular belt conveyor, characterized in that: include: Frame (1); A fixed roller frame (6) equipped with rollers (9) is fixed to the frame (1); A movable roller frame (2) equipped with rollers (9) is elastically connected to the fixed roller frame (6); the fixed roller frame (6) and the movable roller frame (2) form a sandwich space; when the conveyor conveys materials, the rollers of the movable roller frame (2) and the rollers of the fixed roller frame (6) can contact the tubular conveyor belt, so that the tubular conveyor belt passes through the sandwich space; and The sensor is arranged on the frame (1) and is located above the movable roller frame (2) to sense the displacement change of the movable roller frame (2).

2. The monitoring device according to claim 1, characterized in that: The sensor is a limit switch (3), and the limit switch monitors the travel of the movable roller frame (2).

3. The monitoring device according to claim 1, characterized in that: The movable roller frame (2) is elastically connected to the fixed roller frame (6) via a plurality of springs (5), so that when the conveyor transports materials, the rollers of the movable roller frame (2) are pressed against the tubular conveyor belt by the elastic force of the springs.

4. The monitoring device according to claim 3, characterized in that: It also includes a plurality of guide rods (10), one end of each guide rod (10) being fixed to the fixed roller frame (6), the other end of which passes through the spring and the movable roller frame (2) in sequence and is detachably connected to an end head (101) at the end, the end head (101) being capable of abutting against the movable roller frame (2).

5. The monitoring device according to any one of claims 4 to 1, characterized in that: It also includes a controller (7), wherein the controller (7) is configured to receive a signal from the sensor and a current signal from a frequency converter (11) of the conveyor; When the received signal from the sensor shows that the displacement of the movable roller frame (2) is greater than or equal to a set threshold, and the received current signal shows that the current rises, it is determined that the monitoring position is in a pipe collapse state; When the signal received from the sensor shows that the displacement of the movable roller frame (2) is greater than or equal to a set threshold value, and the received current signal has not changed, it is determined that the monitoring position is in a warning state.

6. The monitoring device according to claim 5, characterized in that: It also includes a pipe collapse alarm device (12) connected to the controller, and the controller (7) is configured to be connected to an emergency stop device (13) of a conveyor motor; When the monitoring location is judged to be in a pipe collapse state: The controller (7) is configured to send a signal to the pipe collapse alarm device (12) to prompt a worker to intervene; If the staff fails to intervene effectively and the scope of the pipe collapse expands, the controller (7) sends a signal to the pipe collapse alarm device (12), and the pipe collapse alarm device (12) continuously issues multiple alarms; If the staff fails to intervene effectively and the scope of the pipe collapse expands, the controller (7) sends a signal to the emergency stop device (13) of the conveyor motor, causing the conveyor to be shut down.

7. The monitoring device according to claim 5, characterized in that: It also includes a pipe collapse warning device (14) connected to the controller (7); When it is determined that the monitored position is in a warning state: a signal is sent to the pipe collapse warning device (14) to prompt the staff to conduct monitoring and verification.

8. A method for monitoring pipe collapse, for use in a tubular belt conveyor, wherein the conveyor is equipped with a monitoring device according to any one of claims 1 to 7, characterized in that: The method comprises: Receive the signal of the sensor and the current signal of the inverter of the conveyor; When the received sensor signal shows that the displacement of the movable roller frame (2) is greater than or equal to a set threshold value, and the received current signal shows that the current is rising, it is determined that the monitored position is in a pipe collapse state; When the received sensor signal shows that the displacement of the movable roller frame (2) is greater than or equal to a set threshold value, and the received current signal has not changed, it is determined that the monitoring position is in a warning state.

9. The method according to claim 8, wherein the monitoring device comprises a controller (7) and a pipe collapse alarm device (12) respectively connected to the controller (7), characterized in that: The method, used in the controller (7), comprises: When it is determined that the monitored position is in a pipe collapse state, a signal is sent to the pipe collapse alarm device (12) to prompt staff to intervene; If the staff fails to intervene effectively, the scope of the pipe collapse expands, and a signal is sent to the pipe collapse alarm device (12), causing the pipe collapse alarm device (12) to sound an alarm multiple times; a signal is sent to the emergency stop device of the conveyor motor, causing the conveyor to be shut down.

10. The method according to claim 8, wherein the monitoring device comprises a pipe collapse warning device (14) connected to the controller (7), characterized in that: The method is used for the controller and comprises: when it is determined that the monitoring position is in a warning state, sending a signal to the pipe collapse warning device (14) to prompt the staff to conduct monitoring and verification.

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