Freight cableway operation monitoring system

Abstract

The utility model discloses a freight cableway operation monitoring system, belongs to the technical field of freight cableway safety operation, and aims to monitor the running speed of a cableway in real time. A speed measuring device is arranged at each of the ore loading in-station guide wheel, the ore loading out-station guide wheel, the ore unloading in-station guide wheel and the ore unloading out-station guide wheel; the speed measuring device comprises a fluted disc and a speed measuring sensor; the fluted disc is a circular ring with uniformly distributed teeth on the periphery; the fluted discs are coaxially installed on the peripheries of wheel covers of the corresponding guide wheels and rotate synchronously with the guide wheels. The speed measurement sensor is mounted on the bracket I; a monitoring gap is arranged between the speed measuring sensor and the fluted disc, the speed measuring sensor monitors each tooth passing through the speed measuring sensor on the fluted disc to obtain a pulse signal, and the PLC calculates the traction speed after a counter of the PLC records the number of pulses. The traction speed of the four guide wheels is monitored in real time, the number of monitoring points is large, the speed measurement accuracy is improved, accidents are predicted in time, and positive countermeasures are taken.

Description

Technical Field

[0001] This utility model relates to the field of safe operation technology of freight ropeways, specifically a freight ropeway operation monitoring system. Background Technology

[0002] Circulating freight cableways are essential transportation equipment in coal mine production lines, widely used for raw coal transportation and gangue disposal. With the development of social production, circulating freight cableways are becoming increasingly large-scale. For example, a certain circulating freight cableway currently appearing in a coal mine production line is over 2 kilometers long, with a height difference of up to 300 meters between loading and unloading stations, and a maximum distance of over 360 meters between the cableway towers. When a heavily loaded ore bucket travels between these widely spaced towers, the bucket's speed increases due to downward inertia caused by gravity, resulting in a speed exceeding the theoretical traction speed of the winch. If the four-wheeled components of the ore bucket are not properly maintained, and the ore bucket operates with defects, accidents such as bucket jamming, bucket running away, and bucket falling off are likely to occur between the widely spaced towers. Currently, instead of effectively monitoring the traction speed of the freight cableway, repairs are only carried out after an accident occurs, leading to problems such as short ore bucket lifespan and high maintenance intensity. Utility Model Content

[0003] The purpose of this invention is to provide a freight cableway operation monitoring system to monitor the cableway's operating speed in real time and take timely countermeasures to reduce the failure rate of the freight cableway's mining buckets on the line.

[0004] The technical solution adopted by this utility model is: a freight cableway operation monitoring system, wherein the loading station of the freight cableway is equipped with a loading guide wheel at the entrance and a loading exit guide wheel at the exit; the unloading station of the freight cableway is equipped with an unloading guide wheel at the entrance and an unloading exit guide wheel at the exit; and a speed measuring device is installed at each of the loading guide wheel, the loading exit guide wheel, the unloading guide wheel, and the unloading exit guide wheel.

[0005] The speed measuring device includes a toothed disc and a speed sensor. The toothed disc is a ring with evenly distributed teeth on its outer circumference. The toothed disc is coaxially mounted on the outer circumference of the wheel cover of the corresponding guide wheel and rotates synchronously with the guide wheel. The speed sensor is mounted on a bracket. A monitoring gap is provided between the speed sensor and the toothed disc. The speed sensor monitors each tooth on the toothed disc that passes through the speed sensor to obtain a pulse signal. The PLC counter records the number of pulses and then the PLC calculates the traction speed.

[0006] Furthermore, the gear disc includes two semi-circular annular gear plates, which are joined together to form a circular ring, and each gear plate is detachably connected to the wheel cover of the corresponding guide wheel by bolts.

[0007] Furthermore, the speed sensor at the ore loading guide wheel is speed sensor #1; the speed sensor at the ore loading exit guide wheel is speed sensor #2; the speed sensor at the ore unloading guide wheel is speed sensor #3; and the speed sensor at the ore unloading exit guide wheel is speed sensor #4.

[0008] Speed ​​sensor #1 is communicatively connected to alarm #1; speed sensor #2 is communicatively connected to alarm #2; speed sensor #3 is communicatively connected to alarm #3; and speed sensor #4 is communicatively connected to alarm #4.

[0009] Furthermore, a photosensitive strip is installed on the beam of the horizontal wheel, and a displacement sensor for aligning the photosensitive strip is installed on the support of the track on which the trolley of the horizontal wheel travels. The displacement sensor collects information from the photosensitive strip and transmits it to the PLC to calculate the distance between the counterweight box and the photosensitive strip.

[0010] Furthermore, the displacement sensor is connected to alarm #5.

[0011] The beneficial effects of this utility model are as follows: This utility model installs gear discs that rotate synchronously with the four guide wheels on their wheel covers. Speed ​​sensors are installed on the support frame. When the gear discs rotate, each tooth passing the speed sensor detects its presence and generates an electrical pulse signal. By counting the number of pulses generated per unit time, the rotational speed of the gear discs can be calculated, thus determining the rotational speed of the vertical guide wheels. This, in turn, detects the traction speed of the ore bucket, providing a basis for judging the online operation status of the ore bucket and guiding the proactive implementation of corresponding countermeasures, thereby reducing the failure rate of the freight cableway ore bucket on the line. Installing speed measuring devices at the four guide wheels—the ore loading / unloading guide wheels, the ore unloading / unloading guide wheels, and the ore unloading / unloading guide wheels—allows for real-time monitoring of the traction speed of these four guide wheels. The multiple monitoring points improve the accuracy of speed measurement, enabling timely prediction of accidents and the implementation of proactive countermeasures. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the freight cableway operation monitoring system disclosed in this utility model;

[0013] Figure 2 This is a schematic diagram of a speed measuring device;

[0014] Figure 3 for Figure 2 The left view;

[0015] Figure 4 This is a schematic diagram of the displacement sensor installation.

[0016] In the diagram, the following components are included: 1. Ore loading guide wheel; 2. Ore loading exit guide wheel; 3. Ore unloading guide wheel; 4. Ore unloading exit guide wheel; 5. Speed ​​measuring device; 51. Gear disc; 511. Gear ring plate; 52. Speed ​​sensor; 521. Speed ​​sensor #1; 522. Speed ​​sensor #2; 523. Speed ​​sensor #3; 524. Speed ​​sensor #4; 6. Support 1; 7. Horizontal wheel; 8. Displacement sensor; 9. Photosensitive strip; 10. Support 2; 11. Alarm #1; 12. Alarm #2; 13. Alarm #3; 14. Alarm #4; 15. Alarm #5. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] In the description of this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In addition to the traction cable and the load-bearing cable, the freight cableway also includes vertical guide wheels that guide and support the traction cable, and a support bracket (6) for mounting the vertical guide wheels. The vertical guide wheels include: ore loading guide wheel 1 at the entrance of the ore loading station and ore loading exit guide wheel 2 at the exit; and ore unloading guide wheel 3 at the entrance of the ore unloading station and ore unloading exit guide wheel 4 at the exit.

[0020] The freight cableway operation monitoring system disclosed in this utility model, such as Figure 1 As shown, a speed measuring device 5 is installed at each of the following locations: ore loading guide wheel 1, ore loading exit guide wheel 2, ore unloading guide wheel 3, and ore unloading exit guide wheel 4. Figure 2 and Figure 3 As shown, the speed measuring device 5 includes a toothed disc 51 and a speed sensor 52. The toothed disc 51 is a ring with evenly distributed teeth on its outer circumference. The toothed disc 51 is coaxially mounted on the outer circumference of the wheel cover of the corresponding guide wheel and rotates synchronously with the guide wheel. The speed sensor 52 is mounted on the bracket 6. A monitoring gap is provided between the speed sensor 52 and the toothed disc 51. The speed sensor 52 monitors each tooth on the toothed disc 51 that passes through the speed sensor 52 to obtain the traction speed.

[0021] The corresponding guide wheels refer to the ore loading guide wheel 1, the ore loading exit guide wheel 2, the ore unloading guide wheel 3, or the ore unloading exit guide wheel 4. If the speed measuring device 5 measures the speed of the ore loading guide wheel 1, then the corresponding guide wheel is the ore loading guide wheel 1; the same applies to other guide wheels. These guide wheels are usually covered with wheel covers. The main function of the wheel covers is to protect the internal mechanical components (such as bearings and shafts) of the guide wheels from interference and damage from the external environment (such as dust, rain, and debris), and also to improve the safety and service life of the equipment. Installation is convenient by mounting the gear disc 51 on the outside of the wheel cover. After the gear disc 51 is installed on the wheel cover of the guide wheel, it rotates synchronously with the vertical guide wheel, providing a detection signal for the speed sensor 52. The speed sensor 52 is installed on the bracket 6, and its position is fixed after installation. It is important to note that a monitoring gap is provided between the speed sensor 52 and the toothed disc 51. This gap serves two purposes: firstly, it indicates that the speed sensor 52 performs non-contact detection of the toothed disc 51, avoiding the risk of damage to the sensor due to contact; secondly, this monitoring gap ensures that only one tooth on the toothed disc 51 is within the detection range of the speed sensor 52 at any given time, preventing the sensor from detecting two teeth simultaneously. Furthermore, during operation, every tooth passes through the detection range of the speed sensor 52, ensuring that no tooth passes by without being detected. Thus, when the toothed disc 51 rotates, each tooth passing through the speed sensor 52 detects its presence and generates an electrical pulse signal. By counting the number of pulses generated per unit time, the rotational speed of the toothed disc 51 can be calculated, thereby determining the rotational speed of the vertical guide wheel and ultimately detecting the traction speed of the ore bucket. For example: if the number of teeth on the toothed disc 51 is set to Z, the speed sensor 52 detects N pulses per second, and the number of revolutions of the toothed disc 51 is R, then R = N / Z revolutions per second. The number of revolutions of the toothed disc 51 is also the number of revolutions of the guide wheel on which the toothed disc 51 is mounted. Finally, the speed can be calculated based on the diameter of the guide wheel on which the toothed disc 51 is mounted.

[0022] This utility model sets speed measuring devices 5 at four guide wheels: ore loading guide wheel 1, ore loading exit guide wheel 2, ore unloading guide wheel 3, and ore unloading exit guide wheel 4. This allows for real-time monitoring of the traction speed of the four guide wheels. The multiple monitoring points improve the accuracy of speed measurement, enable timely prediction of accidents, and facilitate proactive response measures.

[0023] Moreover, multiple speed measuring devices 5 are used for monitoring, and they can be backed up to each other. Even if one of them fails during the operation of the freight cableway, the others can continue to be used.

[0024] To facilitate the installation of the gear disc 51 onto the wheel cover of the vertical guide wheel, in this embodiment, as follows: Figure 3As shown, the gear disc 51 includes two semi-circular gear ring plates 301, which are joined together to form a ring. Each gear ring plate 301 is detachably connected to the wheel cover of the vertical guide wheel by bolts. In this way, one gear ring plate 301 can be installed first, and then the other gear ring plate 301 can be installed.

[0025] The speed sensor 52 at the ore loading guide wheel 1 is speed sensor 521 (number 1); the speed sensor 52 at the ore loading exit guide wheel 2 is speed sensor 522 (number 2); the speed sensor 52 at the ore unloading guide wheel 3 is speed sensor 523 (number 3); and the speed sensor 52 at the ore unloading guide wheel 4 is speed sensor 524 (number 4). Speed ​​sensor 521 is communicatively connected to alarm 11 (number 1); speed sensor 522 is communicatively connected to alarm 12 (number 2); speed sensor 523 is communicatively connected to alarm 13 (number 3); and speed sensor 524 is communicatively connected to alarm 14 (number 4). That is, through the communication connection between the corresponding alarm and the speed sensor, when the speed measured by the speed sensor reaches the alarm limit, an audible and visual alarm is triggered to alert the staff.

[0026] As is well known, a counterweight is a device used in freight cableway systems to adjust the tension of the traction cable. It applies a constant tension to the traction cable using its own weight, ensuring that the traction cable maintains proper tension during operation. If the traction cable is too loose, it can lead to unstable operation of the mining bucket, or even derailment or jamming; if the traction cable is too tight, it increases equipment wear and energy consumption. The position of the counterweight moves up and down with changes in the tension of the traction cable. For example, when the tension of the traction cable increases, if the mining bucket jams or the load increases, the counterweight will rise. When the tension of the traction cable decreases, if the traction cable loosens or the load decreases, the counterweight will fall. Therefore, by monitoring the displacement of the counterweight, faults in the cableway operation can be detected in a timely manner, and countermeasures can be taken. In this utility model, if... Figure 4 As shown, a photosensitive strip 9 is installed on the beam column of the horizontal wheel 7, and a displacement sensor 8 for aligning the photosensitive strip 9 is installed on the support 10 of the track on which the running trolley of the horizontal wheel 7 travels. The displacement sensor 8 collects information from the photosensitive strip 9 and transmits it to the PLC to calculate the distance between the counterweight box and the photosensitive strip 9.

[0027] The horizontal wheel 7 at the unloading station serves to guide and support the traction cable. During operation, the horizontal wheel 7 is mounted on a trolley, which is then mounted on the track. The trolley carries the horizontal wheel 7 as it meanders along the track. Since the photosensitive strip 9 is mounted on the beam of the horizontal wheel 7, it moves with the horizontal wheel 7. The displacement sensor 8 is mounted on the support 10 of the track and its position is fixed. By sensing the photosensitive strip 9, the displacement sensor 8 can detect changes in the displacement of the horizontal wheel 7, and the PLC can then calculate the position change of the counterweight, thus monitoring the position of the counterweight. This invention not only monitors the traction speed at the four guide wheels but also monitors the position change of the counterweight. By combining the traction speed and the counterweight displacement for comprehensive comparison, the operating status of the ore bucket on the freight cableway is determined, improving the accuracy of the judgment and reducing the failure rate of the ore bucket on the cableway, thus ensuring efficient cableway production.

[0028] The specific working process of this freight cableway operation monitoring system is as follows:

[0029] There are a total of 4 speed sensors 52 and 1 displacement sensor 8 on each freight cableway line. The 4 speed sensors 52 are: 1# speed sensor 521 for detecting the loading guide wheel 1; 2# speed sensor 522 for detecting the loading guide wheel 2; 3# speed sensor 523 for detecting the unloading guide wheel 3; and 4# speed sensor 524 for detecting the unloading guide wheel 4.

[0030] Speed ​​sensor 521 is communicatively connected to alarm 11. Based on the data measured by speed sensor 521, alarm 11 will trigger an optical-electric alarm under the instruction of the PLC. Speed ​​sensor 522 is communicatively connected to alarm 12. Based on the data measured by speed sensor 522, alarm 12 will trigger an optical-electric alarm under the instruction of the PLC. Alarms 13, 14, and 15 work similarly.

[0031] In the four speed sensors 52 and one displacement sensor 8, if any one of them fails, the alarm corresponding to that sensor will trip and stop working, while the other sensors will continue to operate normally. In this way, these sensors serve as backups for each other, preventing the entire monitoring system from failing due to the failure of one sensor.

[0032] When in use, the limits of each speed sensor 52 are set by the PLC in ascending order as follows: lower limit of speed, lower limit of speed, upper limit of speed, and upper limit of speed;

[0033] The vehicle will automatically stop when any one of the four speed sensors 52 measures a speed that is less than or equal to the lower speed limit.

[0034] The vehicle will automatically stop when any one of the four speed sensors 52 measures a speed greater than or equal to the upper speed limit.

[0035] When the speed measured by any one of the four speed sensors 52 is less than or equal to the lower speed limit, an optical and buzzer alarm will be triggered.

[0036] When any one of the four speed sensors 52 measures a speed greater than or equal to the speed limit, an optical and buzzer alarm will sound.

[0037] The PLC sets the limits of displacement sensor 8 from smallest to largest as follows: lower limit of displacement, lower limit of displacement, upper limit of displacement, and upper limit of displacement;

[0038] When the displacement of the counterweight box measured by displacement sensor 8 is less than or equal to the lower limit of displacement, the machine will automatically stop.

[0039] When the displacement of the counterweight box measured by displacement sensor 8 is greater than or equal to the upper limit of the displacement, the machine will automatically stop.

[0040] When the displacement of the counterweight box measured by displacement sensor 8 is less than or equal to the lower displacement limit, an optical and buzzer alarm will sound.

[0041] When the displacement of the counterweight box measured by displacement sensor 8 is greater than or equal to the upper limit of displacement, an optical and electrical alarm will sound.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A freight cableway operation monitoring system, wherein the loading station of the freight cableway is equipped with a loading guide wheel (1) at the entrance and a loading guide wheel (2) at the exit; the unloading station of the freight cableway is equipped with an unloading guide wheel (3) at the entrance and an unloading guide wheel (4) at the exit; characterized in that: A speed measuring device (5) is installed at each of the ore loading guide wheel (1), the ore loading guide wheel (2), the ore unloading guide wheel (3), and the ore unloading guide wheel (4); The speed measuring device (5) includes a toothed disc (51) and a speed sensor (52). The toothed disc (51) is a ring with evenly distributed teeth on its outer circumference. The toothed disc (51) is coaxially mounted on the outer circumference of the wheel cover of the corresponding guide wheel and rotates synchronously with the guide wheel. The speed sensor (52) is mounted on a bracket (6). A monitoring gap is provided between the speed sensor (52) and the toothed disc (51). The speed sensor (52) monitors each tooth on the toothed disc (51) that passes through the speed sensor (52) to obtain a pulse signal. The PLC counter records the number of pulses and then the PLC calculates the traction speed.

2. The freight cableway operation monitoring system as described in claim 1, characterized in that: The gear disc (51) includes two semi-circular gear rings (511), which are joined together to form a ring, and each gear ring (511) is detachably connected to the wheel cover of the corresponding guide wheel by bolts.

3. The freight cableway operation monitoring system as described in claim 1 or 2, characterized in that: The speed sensor (52) at the ore loading guide wheel (1) is speed sensor #1 (521); the speed sensor (52) at the ore loading exit guide wheel (2) is speed sensor #2 (522); the speed sensor (52) at the ore unloading guide wheel (3) is speed sensor #3 (523); and the speed sensor (52) at the ore unloading exit guide wheel (4) is speed sensor #4 (524). The speed sensor 1 (521) is connected to the alarm 1 (11); the speed sensor 2 (522) is connected to the alarm 2 (12); the speed sensor 3 (523) is connected to the alarm 3 (13); and the speed sensor 4 (524) is connected to the alarm 4 (14).

4. The freight cableway operation monitoring system as described in claim 3, characterized in that: A photosensitive strip (9) is installed on the beam column of the horizontal wheel (7). A displacement sensor (8) for centering the photosensitive strip (9) is installed on the second bracket (10) of the track on which the running trolley of the horizontal wheel (7) travels. The displacement sensor (8) collects information from the photosensitive strip (9) and transmits it to the PLC to calculate the distance between the counterweight box and the photosensitive strip (9).

5. The freight cableway operation monitoring system as described in claim 4, characterized in that: The displacement sensor (8) is connected to the alarm (15) #5.

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