A conveyor belt internal tear detection apparatus

Abstract

The present application relates to the technical fields of conveyor belt tearing, in particular to a conveyor belt tearing internal detection device, which comprises a cover layer, the cover layer is composed of an upper cover layer and a lower cover layer, a core rubber layer is arranged inside the cover layer, a trigger circuit is arranged in a serpentine manner inside the core rubber layer, a power supply and a signal transmitter are fixedly installed inside the core rubber layer, and the power supply, the signal transmitter and the trigger circuit are electrically connected; a monitoring public machine is arranged outside, the monitoring public machine comprises a signal receiver; when the cover layer is torn, the trigger circuit is cut off, the signal transmitter sends a point signal which is received by the signal receiver, so that the power supply is cut off and the cover layer stops working; a plurality of repair mechanisms are arranged inside the lower cover layer, the repair mechanisms repair the breakpoint of the trigger circuit, and the present application can be discovered and stopped in time when the conveyor belt is torn horizontally and vertically.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt tear detection technology, specifically to an internal tear detection device for conveyor belts. Background Technology

[0002] Belt conveyors are essential equipment for transporting materials such as ore and coal, and are widely used in mines and ports. Tear detection of belt conveyors has always been a challenge for users. If tears occur and are not detected promptly, they can cause significant losses, and the lengthy repair process disrupts production.

[0003] In the early stages of longitudinal tearing, the conveyor belt may not show obvious deformation. When the two sides of the conveyor belt are still overlapping after a longitudinal tear, it is difficult for both traditional and new tear detection methods to determine whether the conveyor belt is torn. It can only be detected when the tear worsens. Summary of the Invention

[0004] This invention provides an internal detection device for conveyor belt tears, which has the advantage of being able to detect and stop the conveyor belt in a timely manner when both transverse and longitudinal tears occur.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a conveyor belt tear internal detection device, comprising: a cover layer, the cover layer being composed of an upper cover layer and a lower cover layer, a core adhesive layer being provided inside the cover layer, a trigger circuit being arranged in a serpentine pattern inside the core adhesive layer, and a power supply and a signal transmitter being fixedly installed inside the core adhesive layer, the power supply, the signal transmitter, and the trigger circuit being electrically connected; an external monitoring common unit, the monitoring common unit including a signal receiver; when the cover layer tears, the trigger circuit is cut off, the signal transmitter emits an electrical signal which is received by the signal receiver, thereby cutting off the power supply and stopping the cover layer from working; the lower cover layer is provided with multiple repair mechanisms, when the cover layer does not tear but the trigger circuit is cut off, the repair mechanisms repair the break points of the trigger circuit, enabling it to maintain circuit connection with the power supply, the signal transmitter, and the signal receiver.

[0006] Optionally, the repair mechanism includes a piston chamber, an assembly chamber, and an assembly groove sequentially formed from top to bottom inside the lower cover layer. A single microneedle is slidably mounted inside the piston chamber, assembly chamber, and assembly groove. The microneedle inside the piston chamber is hollow and sealed at its end. Multiple guide holes are arrayed on the outer wall of the microneedle and communicate with its interior. A first flange is slidably mounted inside the piston chamber and fixedly connected to the outer wall of the microneedle. Conductive adhesive is stored inside the piston chamber. A drive unit is provided inside the assembly chamber. When the trigger circuit breaks, the drive unit can drive the microneedle upward to enter the broken gap in the trigger circuit. A display unit is also included, which can indicate that the repair mechanism has been triggered.

[0007] Optionally, the repair mechanism corresponds to and is closely arranged with the trigger circuit, and the repair mechanism is located inside the lower cover layer.

[0008] Optionally, the drive unit includes a second flange that is slidably mounted inside the assembly cavity, and the second flange is fixedly connected to the micro needle. A return spring is fixedly mounted between the second flange and the inner bottom of the assembly cavity, and the return spring and the micro needle are coaxially designed.

[0009] Optionally, the display unit includes a capsule disposed inside the assembly slot, the capsule storing phosphor, and the outer wall of the tip of the microneedle being arrayed with multiple barbs. When the microneedle moves upward, the barbs come into contact with the capsule, and the inner bottom of the assembly slot is made of transparent plastic.

[0010] Optionally, the trigger circuit has a relatively dense serpentine arrangement, and the power supply and signal transmitter have a long strip design.

[0011] Optionally, the microneedles are made of a solid material that is compatible with conductive adhesives. Once the conductive adhesive has cured, the microneedles will not affect the conductivity of the adhesive.

[0012] Optionally, when the trigger line is cut off, the signal transmitter and the signal receiver determine the location of the break in the trigger line by the time difference of the arrival of the power-off reflected signal.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the device described in this patent can detect the tearing situation in the early stage of the conveyor belt tearing, regardless of whether it is a transverse tear or a longitudinal tear, or even if the tearing degree is small, and issue an alarm stop signal to control the conveyor belt to stop; it can also provide feedback on the specific location of the conveyor belt tear, which is convenient for staff to inspect and maintain on site. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of the present invention; Figure 3 For the present invention along Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the serpentine arrangement of the trigger circuit of the present invention.

[0015] In the diagram: 1. Cover layer; 2. Power supply; 3. Signal transmitter; 5. Trigger circuit; 6. Core adhesive layer; 7. Piston chamber; 8. Assembly chamber; 9. Miniature needle; 11. First flange; 12. Second flange; 13. Guide hole; 14. Return spring; 15. Assembly groove; 16. Capsule; 17. Barb. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 5 This invention provides a technical solution: a conveyor belt tear internal detection device, comprising: a cover layer 1, which is composed of an upper cover layer and a lower cover layer, a core adhesive layer 6 inside the cover layer 1, a trigger circuit 5 arranged in a serpentine pattern inside the core adhesive layer 6, a power supply 2 and a signal transmitter 3 fixedly installed inside the core adhesive layer 6, the power supply 2, the signal transmitter 3 and the trigger circuit 5 being electrically connected; an external monitoring common unit, which includes a signal receiver; when the cover layer 1 is torn, the trigger circuit 5 is cut off, the signal transmitter 3 emits an electrical signal which is received by the signal receiver, thereby cutting off the power supply 2 and stopping the cover layer 1 from working; the lower cover layer is provided with multiple repair mechanisms, when the cover layer 1 is not torn but the trigger circuit 5 is cut off, the repair mechanisms repair the break point of the trigger circuit 5, so that it can maintain circuit connection with the power supply 2, the signal transmitter 3 and the signal receiver.

[0018] Traditional belt conveyor tear detection devices are mostly fixed limit devices. One type involves installing a pressure-sensitive switch on the belt conveyor idler frame, which detects pressure by sensing the impact of foreign objects on the belt. This type is often disposable; the switch will be damaged after an impact, resulting in high maintenance costs. Another type uses a pull rope to actuate the sensing iron of a proximity switch. When the pull rope is impacted, the sensing iron moves away from the proximity switch, triggering a tear alarm. This type of switch often has a high rate of false alarms, significantly impacting the integrity of the process. In recent years, emerging tear detection devices have adopted methods such as visual recognition, laser scanning, or magnetic detection. Cameras or magnetic detection devices are installed at fixed positions on the belt conveyor to identify... While this method can detect whether the conveyor belt is torn, it is costly. For a single long conveyor belt, installing one detection device is not feasible because the detection device is far from the tear location, and a large section of the conveyor belt may have already been torn by the time the tear is detected. Installing multiple detection devices would also result in excessively high detection costs. In this embodiment, by setting up a serpentine trigger line 5, when the cover layer 1 has a transverse or longitudinal tear, the trigger line 5 inside the core rubber layer 6 will be cut off. This will cause the electrical signal emitted by the signal transmitter 3 to be unable to be received by the signal receiver, thereby cutting off the power supply 2 and stopping the entire conveyor equipment, so that the staff can promptly inspect and maintain the conveyor belt.

[0019] When the upper cover layer is not torn, but is subjected to impact or heavy pressure, the trigger circuit 5 inside the core layer 6 may break, causing the conveyor equipment to stop and affecting production. In this case, it is too troublesome for the staff to repair the conveyor equipment, as the upper cover layer is not torn and cannot be repaired specifically. Therefore, the repair mechanism can repair the break in the trigger circuit 5 in the above situation, thereby restoring the circuit connection between the trigger circuit 5, the signal transmitter 3 and the signal receiver, and triggering the power supply 2 to restart the conveyor equipment without affecting production. The repair mechanism is set up to a certain extent to prevent the above situation from happening and to repair the trigger circuit 5, thereby restoring the normal operation of the conveyor equipment.

[0020] In a preferred embodiment, the repair mechanism includes a piston chamber 7, an assembly chamber 8, and an assembly groove 15 sequentially formed from top to bottom inside the lower cover layer. A single micro-needle 9 is slidably installed inside the piston chamber 7, assembly chamber 8, and assembly groove 15. The micro-needle 9 inside the piston chamber 7 is hollow and sealed at its end. Multiple guide holes 13 are arrayed on the outer wall of the micro-needle 9, communicating with its interior. A first flange 11 is slidably installed inside the piston chamber 7 and fixedly connected to the outer wall of the micro-needle 9. Conductive adhesive is stored inside the piston chamber 7. A drive unit is provided inside the assembly chamber 8. When the trigger circuit 5 breaks, the drive unit can drive the micro-needle 9 to move upwards and enter the broken gap of the trigger circuit 5. A display unit indicates that the repair mechanism has been triggered. During operation, the conveyor belt may experience special situations. When the bearing surface of the conveyor belt, i.e., the upper cover layer, is impacted or crushed by a heavy object, the cover layer 1 may not tear, but the internal trigger circuit 5 may be cut, causing the machine to stop. In this case, maintenance personnel cannot repair the conveyor belt. This can affect the efficiency of the conveyor belt. By setting up a repair mechanism, when such a special situation occurs, the trigger line 5 can be repaired, and the electrical connection between the trigger line 5, power supply 2, signal transmitter 3 and signal receiver can be restored, so that the conveyor belt can operate normally. The micro needle 9 is always in contact with the outer wall of the trigger line 5. When the trigger line 5 is broken, there will be a certain gap. Under the action of the drive mechanism, the micro needle 9 will move into the gap. By setting the piston cavity 7 to store conductive glue, the displacement of the micro needle 9 will drive the first flange 11 to move upward, thereby squeezing the conductive glue inside the piston cavity 7. The conductive glue will flow into the gap through the guide hole 13 opened on the micro needle 9. After the conductive glue solidifies, it will connect the trigger line, so that the signal transmitter 3 can send an electrical signal that is received by the signal receiver. During the process from the trigger line 5 being cut to being repaired, the conveyor belt will stop for a while. When the trigger line 5 is connected through the conductive glue, the signal transmitter 3 will trigger the power supply 2 to restart, thereby restoring the normal operation of the conveyor belt.

[0021] In a preferred embodiment, the repair mechanism corresponds to and is closely arranged with the trigger line 5. The repair mechanism is located inside the lower cover layer, and its arrangement corresponds to the serpentine arrangement of the trigger line 5. This arrangement is designed so that when a break occurs at any point in the trigger line 5, the repair mechanism can replenish the gap with conductive glue, thereby restoring the electrical connection and improving the practicality of the conveyor belt.

[0022] In a preferred embodiment, the driving unit includes a second flange 12 slidably mounted inside the assembly cavity 8, and the second flange 12 is fixedly connected to the micro needle 9. A return spring 14 is fixedly installed between the second flange 12 and the inner bottom of the assembly cavity 8. The return spring 14 and the micro needle 9 are coaxially designed. The top of the micro needle 9 is always in contact with the outer wall of the trigger circuit 5 through the cooperation of the return spring 14 and the second flange 12, so that the micro needle 9 always has an upward thrust. When a break occurs in the trigger circuit 5, the micro needle 9 is displaced upward by the action of the return spring 14 on the second flange 12, so that the micro needle 9 is displaced into the break. The conductive adhesive is squeezed by the first flange 11, and the conductive adhesive will flow into the break through the guide hole 13. After the conductive adhesive solidifies, the trigger circuit 5 can restore its conductivity.

[0023] In a preferred embodiment, the display unit includes a capsule 16 disposed inside the assembly groove 15. The capsule 16 stores phosphor. Multiple barbs 17 are arrayed on the outer wall of the end of the micro-needle 9. When the micro-needle 9 moves upward, the barbs 17 contact the capsule 16. The inner bottom of the assembly groove 15 is made of transparent plastic. If the cover layer 1 is not torn, but the internal trigger circuit 5 breaks due to impact or weight, the micro-needle 9 is displaced into the breakage gap under the action of the return spring 14. It then squeezes the conductive adhesive inside the piston cavity 7 through the first flange 11, and flows into the breakage gap through the guide hole 13, restoring the broken trigger circuit 5. When the micro needle 9 is displaced, the barbs 17 arrayed on its outer wall will pierce the capsule 16 inside the assembly groove 15. The phosphor stored inside the capsule 16 will flow into the assembly groove 15. The bottom of the assembly groove 15 is made of transparent plastic. By observing the bottom of the cover layer, the staff can understand how many repair mechanisms inside the conveyor belt have been triggered. When many repair mechanisms are triggered, the staff can also inspect the conveyor belt in time to check for any potential dangers, thereby avoiding losses caused by sudden situations during the use of the conveyor belt. At the same time, the triggering of the repair mechanism can determine which parts of the triggering circuit 5 have been repaired.

[0024] In a preferred embodiment, the serpentine arrangement of the trigger circuit 5 is relatively tight, and the power supply 2 and the signal transmitter 3 are designed in a long strip shape. The tight arrangement of the trigger circuit 5 can trigger an alarm at the initial stage of tearing. The long strip design of the power supply 2 and the signal transmitter 3 can prevent the conveyor belt from deforming when passing through the roller, thus affecting its use.

[0025] In a preferred embodiment, the microneedle 9 is made of a solid material with good compatibility with the conductive adhesive. After the conductive adhesive cures, the microneedle 9 will not affect the conductivity of the conductive adhesive. In special cases, when the cover layer 1 is torn and the trigger circuit 5 inside breaks due to impact or gravity, the microneedle 9 will move into the break gap, squeeze the conductive adhesive, and flow it into the break gap through the guide hole 13 to repair the trigger circuit 5. During the solidification process of the conductive adhesive, the microneedle 9 will always remain in the break gap. Since the microneedle 9 is made of a solid material with good compatibility with the conductive adhesive, it will not affect the conductivity of the conductive adhesive after solidification.

[0026] In a preferred embodiment, when the trigger line 5 is cut off, the signal transmitter 3 and the signal receiver determine the location of the break in the trigger line 5 by the time difference between the arrival of the power-off reflected signal.

[0027] Working principle: When the internal tear detection device of this conveyor belt is in use, the trigger line 5 arranged in a serpentine pattern inside the core rubber layer 6 will be cut off when the cover layer 1 is torn laterally or longitudinally. As a result, the signal receiver will not be able to receive the electrical signal emitted by the signal transmitter 3, and the power supply 2 will be cut off, causing the transmission equipment to stop for maintenance. When the cover layer 1 is not torn but the trigger line 5 inside is broken by impact or weight, the micro needle 9 will move into the broken gap under the action of the return spring 14. It will squeeze the conductive glue inside the piston cavity 7 through the first flange 11. The conductive glue will flow into the broken gap through the guide hole 13. When the conductive glue solidifies, it can restore the conductivity of the trigger line 5, thereby restoring its electrical connection with the signal transmitter 3 and the signal receiver, thus triggering the power supply 2 and making the conveyor belt run normally.

[0028] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification and drawings can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conveyor belt tear detection device, characterized in that, include: Covering layer (1), the covering layer (1) is composed of an upper covering layer and a lower covering layer. The covering layer (1) has a core adhesive layer (6) inside. The core adhesive layer (6) has a trigger circuit (5) arranged in a serpentine pattern inside. The core adhesive layer (6) has a power supply (2) and a signal transmitter (3) fixedly installed inside. The power supply (2), the signal transmitter (3) and the trigger circuit (5) are designed to be electrically connected. An externally located monitoring unit, which includes a signal receiver; When the cover layer (1) is torn, the trigger line (5) is cut off, the signal transmitter (3) sends an electrical signal which is received by the signal receiver, thereby cutting off the power supply (2) and causing the cover layer (1) to stop working. The lower cover layer is provided with multiple repair mechanisms. When the cover layer (1) is not torn but the trigger line (5) is cut, the repair mechanism repairs the break point of the trigger line (5) so that it can maintain circuit connection with the power supply (2), the signal transmitter (3) and the signal receiver. The repair mechanism includes a piston cavity (7), an assembly cavity (8), and an assembly groove (15) sequentially opened from top to bottom inside the lower cover layer. A micro needle (9) is slidably installed inside the piston cavity (7), the assembly cavity (8), and the assembly groove (15). The micro needle (9) located inside the piston cavity (7) is hollow and sealed at the end. Multiple guide holes (13) are arrayed on the outer wall of the micro needle (9) and communicate with its interior. A first flange (11) is slidably installed inside the piston cavity (7) and is fixedly connected to the outer wall of the micro needle (9). The piston cavity (7) stores conductive glue inside. The assembly cavity (8) is equipped with a drive unit. When the trigger line (5) breaks, the drive unit can drive the micro needle (9) to move upward and enter the broken gap of the trigger line (5). The display unit is capable of indicating to the outside world that the repair mechanism has been triggered.

2. The conveyor belt tear internal detection device according to claim 1, characterized in that: The repair mechanism corresponds to and is closely arranged with the trigger line (5), and the repair mechanism is located inside the lower cover layer.

3. The conveyor belt tear internal detection device according to claim 1, characterized in that: The drive unit includes a second flange (12) that is slidably mounted inside the assembly cavity (8), and the second flange (12) is fixedly connected to the micro needle (9). A return spring (14) is fixedly mounted between the second flange (12) and the inner bottom of the assembly cavity (8). The return spring (14) and the micro needle (9) are coaxially designed.

4. The conveyor belt tear internal detection device according to claim 1, characterized in that: The display unit includes a capsule (16) disposed inside the assembly groove (15), the capsule (16) contains phosphor, and the outer wall of the end of the micro needle (9) is arrayed with multiple barbs (17). When the micro needle (9) moves upward, the barbs (17) come into contact with the capsule (16). The inner bottom of the assembly groove (15) is made of transparent plastic.

5. The conveyor belt tear internal detection device according to claim 3, characterized in that: The trigger circuit (5) is arranged in a relatively tight serpentine pattern, and the power supply (2) and signal transmitter (3) are designed in a long strip shape.

6. The conveyor belt tear internal detection device according to claim 1, characterized in that: The micro needle (9) is made of a solid material that is compatible with conductive adhesive. When the conductive adhesive is cured, the micro needle (9) will not affect the conductivity of the conductive adhesive.

7. The conveyor belt tear internal detection device according to any one of claims 1-6, characterized in that: When the trigger line (5) is cut off, the signal transmitter (3) and the signal receiver determine the location of the break in the trigger line (5) by the time difference of the arrival of the power-off reflected signal.

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