Belt anti-tearing protection device

Abstract

The utility model relates to a belt anti-tearing protection device which comprises a conveying belt and parallel carrier rollers, the conveying belt comprises an upper belt body and a lower belt body, and the parallel carrier rollers are arranged between the upper belt body and the lower belt body through an installation frame. The device further comprises a movable door type discharging nozzle, a movable door position detection switch, a belt strip, a signal trigger rod, a material leakage position detection switch and a PLC control system. Large foreign matters are detected in real time through the movable door type discharging nozzle and the movable door position detection switch, discharging accumulation accidents caused by the fact that the large foreign matters are clamped at the discharging nozzle are prevented, belt scratching caused by the fact that the large foreign matters are clamped at the discharging nozzle is also prevented, and leaked materials caused by upper belt scratching are intercepted in real time through the belt strip; the belt strip drives the signal trigger rod to rotate at an angle, the leakage position detection switch is triggered, belt scratch leakage is detected in real time, the PLC control system stops rotation of the belt conveyor in time, early discovery and early alarm are achieved, belt scratch accidents are prevented from being expanded, the fault processing time is shortened, the structure is simple, and transformation is easy.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a belt anti-tearing protection device. Background Art

[0002] Belt conveyor systems are widely used in the steel industry due to their high transportation efficiency, low cost and long service life. During use, the belts are easily scratched, damaged or even scrapped due to foreign objects or foreign matter mixed in the materials, which has become an important reason for belt maintenance and replacement. It is urgent to take anti-scratch and anti-tear protection for the belts to ensure their safe operation. Existing belt anti-tear protection devices generally have problems such as imperfect functions and delayed response, making it difficult to effectively prevent belt tearing accidents.

[0003] A Chinese patent with the announcement number CN 218706534 U discloses a belt scratch detection device, including a conveyor belt, the conveyor belt including an upper belt and a lower belt, a funnel body is arranged between the upper belt and the lower belt, the funnel body is arranged below the unloading point of the conveyor belt, the funnel body is slidably arranged on the columns on both sides of the conveyor belt through a telescopic mechanism, and a sensing element is arranged on the column; a steel bar is arranged horizontally below the upper belt, one end of the steel bar is connected to the column, and the other end of the steel bar is connected to a second sensing element, and the second sensing element is fixed on another column. When material accumulates in the funnel body, the funnel body falls through the telescopic mechanism and triggers the sensing element to send an alarm; when a sharp material is scratched and stuck on the belt, the steel bar touches the foreign matter and sends an alarm in time; but the second sensing element of the device will only be triggered when material is accumulated, and once the front end of the funnel body is scratched, the material cannot fall into the funnel body, and the signal will be detected only when the belt is turned back to the unloading port and the funnel body, so there is a risk of signal detection lag and serious belt damage. Summary of the invention

[0004] The utility model provides a belt tearing protection device, which utilizes a movable door type feeding nozzle and a movable door position detection switch to detect large foreign objects in real time, so as to prevent large foreign objects from being stuck at the feeding nozzle and causing feeding accumulation accidents, and also prevent large foreign objects from being stuck at the feeding nozzle and causing belt scratches. The belt strip is utilized to intercept material leakage due to upper belt scratches in real time, and the belt strip drives a signal trigger rod to rotate an angle, triggering a leakage position detection switch, and detecting belt scratches and leakage in real time. The PLC control system stops the belt conveyor from rotating in time, and early detection and early alarm are achieved, so as to avoid the expansion of belt scratch accidents and shorten the fault handling time. The structure is simple and easy to modify.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A belt tear protection device, comprising a conveyor belt and parallel rollers, wherein the conveyor belt comprises an upper belt and a lower belt, and the parallel rollers are arranged between the upper belt and the lower belt through a mounting frame; further comprising a movable door type feed nozzle, a movable door position detection switch, a belt strip, a signal trigger rod, a leakage position detection switch and a PLC control system;

[0007] The movable door position detection switch is arranged above the movable door of the movable door type feeding nozzle, there is a gap between the operating head of the movable door position detection switch and the movable door of the movable door type feeding nozzle, and the movable door type feeding nozzle is arranged above the belt;

[0008] The belt strip is installed between the lower side of the parallel roller and the lower belt, the gap between the lower side of the belt strip and the lower belt is 2 to 5 cm, the installation direction of the belt strip is perpendicular to the running direction of the lower belt, the belt strip is set on the mounting frame of the parallel roller, and the mounting connection is provided with a rotating shaft of the belt strip, the signal trigger rod is welded on the rotating shaft of the belt strip, and rotates coaxially with the belt strip, and a leakage position detection switch is set at the rotation offset position of the trigger rod;

[0009] The signal lines of the movable door position detection switch and the material leakage position detection switch are both connected to the digital quantity input port of the PLC control system.

[0010] Furthermore, it also includes an HMI human-machine interface, which is connected to the PLC control system via an Ethernet communication cable.

[0011] Furthermore, the leakage position detection switch is non-contact.

[0012] Furthermore, the movable door position detection switch is arranged at a height 1.2 to 1.3 times of the movable door of the movable door type feeding nozzle.

[0013] Furthermore, the digital output port of the PLC control system is connected to the start / stop switch of the belt conveyor.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) Use the movable door type feed nozzle and the movable door position detection switch to detect large foreign objects in real time to prevent large foreign objects from getting stuck at the feed nozzle and causing material accumulation accidents, and also prevent large foreign objects from getting stuck at the feed nozzle and causing belt scratches;

[0016] 2) Use the belt strip to intercept the leakage caused by the upper belt scratch in real time. The belt strip drives the signal trigger rod to rotate at an angle, triggering the leakage position detection switch to detect the belt scratch leakage in real time;

[0017] 3) The PLC control system stops the belt conveyor in time, detects and alarms early, avoids the expansion of belt scratch accidents, shortens fault handling time, and has a simple structure and is easy to modify. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of electrical connections of the PLC control system of the utility model.

[0020] Figure 3 It is a schematic diagram of the position of the movable door position detection switch when there is foreign matter in the movable door type feeding nozzle.

[0021] In the figure: 1. Upper belt 2. Lower belt 3. Parallel rollers 4. Mounting frame 5. Movable door type feeding nozzle 6. Movable door 7. Movable door position detection switch 8. Belt strip 9. Signal trigger rod 10. Leakage position detection switch DETAILED DESCRIPTION

[0022] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0023] See Figure 1 , Figure 3 , is a schematic diagram of the structure of the utility model. The utility model is a belt tear protection device, comprising a conveyor belt and parallel rollers 3, wherein the conveyor belt comprises an upper belt 1 and a lower belt 2, and the parallel rollers 3 are arranged between the upper belt 1 and the lower belt 2 through a mounting frame 4; further comprising a movable door type feed nozzle 5, a movable door position detection switch 7, a belt strip 8, a signal trigger rod 9, a leakage position detection switch 10 and a PLC control system.

[0024] The movable door position detection switch 7 is arranged above the movable door 6 of the movable door type feeding nozzle 5, and there is a gap between the operating head of the movable door position detection switch 7 and the movable door 6 of the movable door type feeding nozzle 5. The movable door type feeding nozzle 5 is arranged above the belt, and the movable door position detection switch 7 is arranged at 1.2 times the height of the movable door 6 of the movable door type feeding nozzle 5.

[0025] The belt strip 8 is installed between the lower belt 2 and the parallel roller 3, and the gap between the lower edge of the belt strip 8 and the lower belt 2 is 3 cm. The installation direction of the belt strip 8 is perpendicular to the running direction of the upper belt 1 and the lower belt 2. The belt strip 8 is set on the mounting frame 4 of the parallel roller 3. The mounting connection is provided with a rotating shaft of the belt strip 8. The signal trigger rod 9 is welded on the rotating shaft of the belt strip 8 and rotates coaxially with the belt strip 8. A leakage position detection switch 10 is set at the rotation offset position of the trigger rod. The leakage position detection switch 10 is non-contact; it also includes an HMI human-machine interface, which is connected to the Ethernet communication port of the PLC control system through an Ethernet communication cable. Figure 2The signal lines of the movable door position detection switch 7 and the leakage position detection switch 10 are connected to the digital input port of the PLC control system, and the digital output port of the PLC control system is connected to the start and stop switch of the belt conveyor.

[0026] Working principle: When materials and small pieces of debris fall during the production process, if their volume is smaller than the distance between the movable door-type discharge nozzle 5 and the belt, the materials and small pieces of debris can pass smoothly without causing scratches on the belt. When large pieces of foreign matter fall and get stuck between the movable door-type discharge nozzle 5 and the belt, the movable door 6 of the movable door-type discharge nozzle 5 opens and contacts the movable door position detection switch 7, triggering the movable door position detection switch 7. The PLC control system outputs a stop signal, the belt conveyor stops, and the belt tearing information is displayed on the HMI human-machine interface.

[0027] The belt strip 8 can rotate within a range of 180° along with the rotating shaft and the signal trigger rod 9. The principle is similar to that of a swingable weight. When the belt is running without leakage, the leakage position detection switch 10 is not triggered. When the upper belt 1 is scratched and leaks, the material falls on the lower belt 2 and follows the lower belt 2 to run. When the material runs to the lower belt 2 and contacts the belt strip 8, the belt strip 8 blocks the material rotating shaft and causes an angular deviation, driving the signal trigger rod 9 to rotate coaxially. The signal trigger rod 9 triggers the leakage detection switch, and the PLC control system outputs a stop signal, the belt conveyor stops, and the belt tearing information is displayed on the HMI screen.

[0028] The above embodiments are implemented based on the technical solution of the utility model, and detailed implementation methods and specific operation processes are given, but the protection scope of the utility model is not limited to the above embodiments. The methods used in the above embodiments are conventional methods unless otherwise specified.

Claims

1. A belt tear protection device, comprising a conveyor belt and parallel rollers, wherein the conveyor belt comprises an upper belt and a lower belt, and the parallel rollers are arranged between the upper belt and the lower belt through a mounting frame; characterized in that: It also includes a movable door type feed nozzle, a movable door position detection switch, a belt strip, a signal trigger rod, a leakage position detection switch and a PLC control system; The movable door position detection switch is arranged above the movable door of the movable door type feeding nozzle, there is a gap between the operating head of the movable door position detection switch and the movable door of the movable door type feeding nozzle, and the movable door type feeding nozzle is arranged above the belt; The belt strip is installed between the lower side of the parallel roller and the lower belt, the gap between the lower side of the belt strip and the lower belt is 2 to 5 cm, the installation direction of the belt strip is perpendicular to the running direction of the lower belt, the belt strip is set on the mounting frame of the parallel roller, and the mounting connection is provided with a rotating shaft of the belt strip, the signal trigger rod is welded on the rotating shaft of the belt strip, and rotates coaxially with the belt strip, and a leakage position detection switch is set at the rotation offset position of the trigger rod; The signal lines of the movable door position detection switch and the material leakage position detection switch are both connected to the digital quantity input port of the PLC control system.

2. A belt tear protection device according to claim 1, characterized in that: It also includes an HMI human-machine interface, which is connected to the PLC control system via an Ethernet communication cable.

3. A belt tear protection device according to claim 1, characterized in that: The leakage position detection switch is non-contact type.

4. A belt tear protection device according to claim 1, characterized in that: The movable door position detection switch is arranged at a height 1.2 to 1.3 times the height of the movable door of the movable door type feeding nozzle.

5. The belt tear protection device according to claim 1, characterized in that: The digital output port of the PLC control system is connected to the start and stop switch of the belt conveyor.

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