A belt conveyor with early warning function for material accumulation

Abstract

This utility model discloses a belt conveyor with material accumulation early warning, relating to the technical field of grain loading conveyor lines. The belt conveyor includes a conveyor with through-beam photoelectric sensing units positioned across both sides of the material transport path on the conveyor belt at its output end. The output of each photoelectric sensing unit is electrically connected to the input of a PLC controller. The PLC controller has a built-in blockage detection module and a built-in timing module. The output of the PLC controller is electrically connected to an alarm device and a servo driver, and the output of the servo driver is electrically connected to the conveyor belt motor. This utility model utilizes non-contact detection with through-beam photoelectric sensing units, combined with delay control by the PLC controller, improving reliability and response speed. It enables the photoelectric sensor to detect blockages, triggering an alarm and automatically starting and stopping the conveyor belt. This facilitates timely clearing and loading of blocked materials by a palletizing robot. After the blockage is resolved, the conveyor resumes operation, thus solving the blockage problem.

Description

Technical Field

[0001] This utility model relates to the technical field of grain loading and conveying lines, specifically a belt conveyor with material accumulation early warning function. Background Technology

[0002] Belt conveyors are a component of grain loading lines, used in palletizing systems. In existing technologies, during grain loading and palletizing, belt conveyors continuously transport bagged materials to the loading area. Palletizing robots then automatically handle the bagged materials on the belt conveyor for loading. During loading, material blockages on the conveyor are inevitable and require timely removal. Current conveyor blockage detection methods primarily use mechanical baffle sensors, which suffer from wear and high false alarm rates. Therefore, to improve reliability and response speed and address blockage response issues, we provide a belt conveyor with a material accumulation early warning system. Utility Model Content

[0003] The purpose of this invention is to provide a belt conveyor with a material accumulation early warning function, which improves the reliability and response speed of the blockage response through non-contact detection.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a belt conveyor for material accumulation early warning, comprising a conveyor, wherein the output end of the conveyor is provided with a through-beam photoelectric sensor unit spanning both sides of the material transmission path of the conveyor belt, the output end of the photoelectric sensor unit is electrically connected to the input end of a PLC controller, the PLC controller has a built-in blockage judgment module, and the installation height of the photoelectric sensor unit is set to correspond to the height of the middle of the material; When the material on the conveyor continuously blocks the light beam, the photoelectric sensor unit outputs a continuous low-level signal to the blockage determination module of the PLC controller. When the blockage is determined, the PLC controller outputs an alarm signal and a stop signal. When the material on the conveyor intermittently blocks the light beam, the photoelectric sensor unit outputs a pulse signal to the blockage determination module of the PLC controller. When the blockage is determined to be resolved, the PLC controller outputs a restart signal. The PLC controller has a built-in timing module. The instructions sent by the PLC controller are delayed by the timing module. The output terminals of the PLC controller are electrically connected to the alarm device and the servo driver respectively. The output terminal of the servo driver is electrically connected to the conveyor belt motor. The alarm device responds to the alarm signal and stops the alarm in response to the restart signal. The servo driver stops the power in response to the stop signal and restores the power supply in response to the restart signal.

[0005] Preferably, the PLC controller receives a continuous low-level signal to drive the alarm device to sound an alarm and drives the conveyor belt motor to stop via a servo driver. The PLC controller receives a recovered pulse signal to drive the alarm device to turn off the alarm and drives the conveyor belt motor to restart via a servo driver.

[0006] Preferably, the alarm device is an audible and visual alarm.

[0007] Preferably, the through-beam photoelectric sensing unit includes a transmitter and a receiver. The transmitter and receiver of the photoelectric sensing unit are fixed on the frame of the conveyor by a metal bracket, and the optical axis of the transmitter is directly opposite the photosensitive surface of the receiver. The input terminal of the PLC controller is connected to the receiver signal.

[0008] Preferably, the conveyor includes a support roller, a tension roller, and a power roller mounted on a frame. The conveyor belt is wound around the surfaces of the support roller, the tension roller, and the power roller. The conveyor belt motor drives the power roller to rotate and thus drives the conveyor belt to run through a transmission mechanism.

[0009] Preferably, the output end of the conveyor is provided with a baffle plate.

[0010] This utility model has the following beneficial effects: This invention improves reliability and response speed by setting up a photoelectric sensing unit, a PLC controller, and an alarm device. It utilizes a through-beam photoelectric sensing unit for non-contact detection and combines it with delay control by the PLC controller. This enables the photoelectric sensor to detect material blockage, trigger an alarm, and automatically start and stop the conveyor belt. After the conveyor stops, it will not continue to feed material, allowing the palletizing robot to promptly clear the blocked material and load it onto the truck. Once the blockage is resolved, the conveyor resumes operation, thus solving the material blockage problem. Attached Figure Description

[0011] Figure 1 This is a front view of the present utility model; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a right sectional view of the conveyor belt location of this utility model; Figure 4 This is a schematic diagram of the system of this utility model.

[0012] In the diagram: 1. Conveyor; 11. Conveyor belt; 12. Support roller; 13. Tension roller; 14. Power roller; 15. Transmission mechanism; 2. Photoelectric sensor unit; 3. PLC controller; 31. Blockage detection module; 32. Timing module; 4. Alarm device; 5. Servo driver; 6. Conveyor belt motor; 7. Metal bracket; 8. Baffle plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0014] like Figure 1-4 As shown, this utility model provides a technical solution: a belt conveyor for material accumulation early warning, including a conveyor 1. The output end of the conveyor 1 is provided with a through-beam photoelectric sensor unit 2 spanning both sides of the material transmission path of the conveyor belt 11. The through-beam photoelectric sensor unit 2 includes a transmitter and a receiver. The transmitter and receiver of the photoelectric sensor unit 2 are fixed on the frame of the conveyor 1 by a metal bracket 7, and the optical axis of the transmitter and the photosensitive surface of the receiver are directly opposite each other. The installation height of the photoelectric sensor unit 2 corresponds to the height of the middle of the material and is used to detect the material flow status. The receiver output of the photoelectric sensing unit 2 is electrically connected to the input of the PLC controller 3 to send signals. The PLC controller 3 has a built-in blockage judgment module 31. The blockage judgment module 31 determines the blockage duration as T1. The duration of the continuous low-level signal output by the photoelectric sensing unit 2 is compared with T1. When the detected beam is continuously blocked for more than T1, it is judged as a blockage. The PLC controller 3 has a built-in timing module 32. The instructions sent by the PLC controller 3 are delayed by the timing module 32. The delay duration of the timing module 32 is recorded as T2. T2 < T1. The delay prevents the blockage from being immediately restarted after it is cleared, which would cause the blockage to recur. It also prevents frequent start-stops from damaging the conveyor belt motor 6. When material on conveyor 1 continuously blocks the light beam, photoelectric sensor unit 2 outputs a continuous low-level signal to the blockage judgment module 31 of PLC controller 3. When blockage is detected, PLC controller 3 outputs an alarm signal and a stop signal. When material on conveyor 1 intermittently blocks the light beam, photoelectric sensor unit 2 outputs a pulse signal to the blockage judgment module 31 of PLC controller 3. When blockage is detected to be resolved, PLC controller 3 outputs a restart signal. PLC controller 3 receives a continuous low-level signal to drive alarm device 4 to alarm and drives conveyor belt motor 6 to stop via servo driver 5. After stopping, conveyor 1 no longer feeds material, which facilitates the palletizing robot to clean up the blocked material and load it onto the vehicle in a timely manner. After the blockage is resolved, PLC controller 3 receives the restored pulse signal to drive alarm device 4 to turn off the alarm and drives conveyor belt motor 6 to restart via servo driver 5. The output of PLC controller 3 is electrically connected to alarm device 4 and servo driver 5 respectively. The output of servo driver 5 is electrically connected to conveyor belt motor 6. Alarm device 4 is an audible and visual alarm. Alarm device 4 alarms in response to alarm signal and stops alarming in response to restart signal. Servo driver 5 stops power in response to stop signal and restores power in response to restart signal. The output end of the conveyor 1 is equipped with a baffle plate 8 to prevent material from falling due to blockage. The conveyor 1 includes a support roller 12, a tension roller 13 and a power roller 14 mounted on the frame. The conveyor belt 11 of the conveyor 1 is wound around the roller surfaces of the support roller 12, the tension roller 13 and the power roller 14. The conveyor belt motor 6 drives the power roller 14 to rotate through the transmission mechanism 15, thereby driving the conveyor belt 11 to run.

[0015] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0016] 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 belt conveyor for material accumulation early warning, comprising a conveyor (1), characterized in that: The output end of the conveyor (1) is provided with a through-beam photoelectric sensor unit (2) spanning both sides of the material transmission path of the conveyor belt (11). The output end of the photoelectric sensor unit (2) is electrically connected to the input end of the PLC controller (3). The PLC controller (3) has a built-in blockage judgment module (31). The installation height of the photoelectric sensor unit (2) is set to correspond to the height of the middle part of the material. When the material on the conveyor (1) continuously blocks the light beam, the photoelectric sensing unit (2) outputs a continuous low-level signal to the blockage judgment module (31) of the PLC controller (3). When the blockage is judged, the PLC controller (3) outputs an alarm signal and a stop signal. When the material on the conveyor (1) intermittently blocks the light beam, the photoelectric sensing unit (2) outputs a pulse signal to the blockage judgment module (31) of the PLC controller (3). When the blockage is judged to be resolved, the PLC controller (3) outputs a restart signal. The PLC controller (3) has a built-in timing module (32). The instructions sent by the PLC controller (3) are delayed by the timing module (32). The output terminals of the PLC controller (3) are electrically connected to the alarm device (4) and the servo driver (5). The output terminal of the servo driver (5) is electrically connected to the conveyor belt motor (6). The alarm device (4) responds to the alarm signal and stops the alarm in response to the restart signal. The servo driver (5) stops the power in response to the stop signal and restores the power supply in response to the restart signal.

2. The belt conveyor for material accumulation early warning according to claim 1, characterized in that: The PLC controller (3) receives a continuous low-level signal to drive the alarm device (4) to alarm and drives the conveyor belt motor (6) to stop via the servo driver (5). The PLC controller (3) receives a restored pulse signal to drive the alarm device (4) to turn off the alarm and drives the conveyor belt motor (6) to restart via the servo driver (5).

3. The belt conveyor for material accumulation early warning according to claim 1, characterized in that: The alarm device (4) is an audible and visual alarm.

4. The belt conveyor for material accumulation early warning according to claim 1, characterized in that: The photoelectric sensing unit (2) of the through-beam type includes a transmitter and a receiver. The transmitter and receiver of the photoelectric sensing unit (2) are fixed on the frame of the conveyor (1) by a metal bracket (7), and the optical axis of the transmitter is set facing the photosensitive surface of the receiver. The input terminal of the PLC controller (3) is connected to the receiver signal.

5. A belt conveyor for material accumulation early warning according to claim 1, characterized in that: The conveyor (1) includes a support roller (12), a tension roller (13) and a power roller (14) mounted on a frame. The conveyor belt (11) of the conveyor (1) is wound around the roller surfaces of the support roller (12), the tension roller (13) and the power roller (14). The conveyor belt motor (6) drives the power roller (14) to rotate through the transmission mechanism (15) to drive the conveyor belt (11) to run.

6. A belt conveyor for material accumulation early warning according to claim 1, characterized in that: The output end of the conveyor (1) is provided with a baffle plate (8).

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