A belt deviation detection device for a belt conveyor

Abstract

The present invention discloses a belt deviation detection device for a belt conveyor, which relates to the technical field of belt conveyors. The deviation detection device includes a sealed box, and two support arms are arranged on one side of the sealed box. The two support arms are arranged vertically and parallel to each other. A buffer wheel with a vertically extending axis is arranged between the two support arms. The buffer wheel is slidably and transitionally connected to the support arms through a sliding assembly. The device further includes a driving rod fixedly connected to the buffer wheel. The driving rod passes through the sealed box and extends into the interior of the sealed box. A moving laser detection transmitter is arranged at the top end of the driving rod and inside the sealed box. A normal operation laser detection receiver, a deviation warning laser detection receiver, and a braking laser detection receiver are arranged in the sealed box corresponding to the moving laser detection transmitter in sequence. In the present invention, the deviation state of the belt is determined by the combination of mechanical detection and optical detection, and the detection state is accurate and stable.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveyors, and particularly to a belt deviation detection device for a belt conveyor. Background Art

[0002] A belt conveyor is a key device mainly used for continuously conveying bulk materials such as ores and coals. A belt conveyor mainly consists of a conveyor belt (the core component for carrying materials, usually made of materials such as rubber and PVC), a driving device (including a motor, a reducer, and a driving roller, providing power), idlers (supporting the conveyor belt and reducing friction, divided into load-carrying and return idlers), a tensioning device (maintaining appropriate tension of the conveyor belt to prevent slipping), a frame (the structure supporting the entire device), a cleaner (removing materials adhering to the conveyor belt), and protection devices (such as deviation switches and emergency stop switches to ensure safe operation).

[0003] Belt deviation is a common problem in conveyors, which may cause material spillage, equipment damage, and even safety accidents. Therefore, a belt deviation detection device is very important. In the prior art, common belt deviation detection devices include mechanical deviation switches, photoelectric detection devices, etc.

[0004] Among them, the mechanical deviation switch detects belt deviation through mechanical contact. When the belt touches the swing rod or roller of the switch, an alarm or shutdown signal is triggered. Advantages: high detection reliability; Disadvantages: physical contact is required, and the swing rod acts on the belt under the reaction force of the return spring. When it receives a large reaction force, it will bend and fold, resulting in damage to the belt.

[0005] The photoelectric detection device uses a photoelectric sensor or a laser sensor to detect the edge position of the belt. Advantages: fast response, suitable for high-speed scenarios; Disadvantages: dust, fog, or strong light environments may affect the accuracy. Summary of the Invention

[0006] The purpose of the present invention is to provide a belt deviation detection device for a belt conveyor, which combines a mechanical deviation switch and a photoelectric detection device, that is, it retains the advantages of the mechanical deviation switch being stable and reliable, and at the same time solves the disadvantage that the traditional swing rod acts on the belt under the reaction force of the return spring and will bend and fold when receiving a large reaction force, resulting in damage to the belt; at the same time, it retains the advantages of the photoelectric detection device having a fast response and being suitable for high-speed scenarios, and solves the disadvantage that the photoelectric detection device may affect the accuracy in dust, fog, or strong light environments.

[0007] To achieve the above object, the present invention provides the following technical solution: A belt deviation detection device for a belt conveyor, including a sealed box. On one side of the sealed box, there are two support arms. The two support arms are arranged vertically and parallel to each other. Between the two support arms, there is a buffer wheel with a vertically extending axis. The buffer wheel is slidably connected to the support arms through a sliding component. It also includes a driving rod fixedly connected to the buffer wheel. The driving rod passes through the sealed box and extends into the interior of the sealed box. At the top of the driving rod and inside the sealed box, there is a moving laser detection emitter. Inside the sealed box, there are a normal operation laser detection receiver, a deviation warning laser detection receiver, and a braking laser detection receiver corresponding to the moving laser detection emitter in sequence. Outside the sealed box, there are also a normal operation indicator light, a deviation warning indicator light, and a braking indicator light. The normal operation indicator light, the deviation warning indicator light, and the braking indicator light are electrically connected to the normal operation laser detection receiver, the deviation warning laser detection receiver, and the braking laser detection receiver respectively.

[0008] Preferably, the sliding component includes slide rails respectively arranged on the inner sides of the two support arms. A slider is slidably engaged with the slide rails. A shaft seat is arranged on the slider. The buffer wheel is connected to the shaft seat in a cooperating manner.

[0009] Preferably, the buffer wheel is connected to the shaft seat through a transition connecting shaft.

[0010] Preferably, a fixed square shaft is arranged at the bottom of the buffer wheel, and a movable square shaft that can slide up and down is arranged at the top of the buffer wheel. A first spring for hindering the downward movement of the movable square shaft is arranged between the movable square shaft and the buffer wheel. Slots are arranged on the transition connecting shaft. The fixed square shaft and the movable square shaft are respectively inserted into the corresponding slots of the transition connecting shaft. The transition connecting shaft is respectively rotatably engaged with the corresponding shaft seat.

[0011] Preferably, an accommodating groove extending up and down is arranged at the top of the buffer wheel. The movable square shaft is slidably arranged in the accommodating groove. The first spring is located in the accommodating groove.

[0012] Preferably, a limiting mechanism for hindering the driving rod from moving away from the sealed box is also arranged between the driving rod and the sealed box.

[0013] Preferably, the limiting mechanism includes a mounting shell fixed to the outside of the sealed box. Inside the mounting shell, there is a ratchet that can slide up and down. The ratchet passes through the mounting shell and extends above the mounting shell. A second spring for hindering the downward movement of the ratchet is arranged inside the mounting shell. A number of uniformly arranged ratchet grooves are arranged at the bottom of the driving rod. The ratchet is engaged with the ratchet grooves.

[0014] Preferably, a second button is provided on one side of the ratchet, and the top end of the second button is lower than the top end of the ratchet.

[0015] Preferably, the two shaft seats are transitionally connected by a connecting rod, and the driving rod is fixedly connected to the connecting rod.

[0016] Preferably, an operation status indicator light is further provided in the sealing box. The operation status indicator light is three in number and is respectively electrically connected to the normal operation laser detection receiver, the deviation warning laser detection receiver, and the braking laser detection receiver.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, the combination of a mechanical deviation switch and an optoelectronic detection device is adopted, which not only retains the advantages of stable and reliable mechanical deviation switches but also solves the problem that the traditional swing rod acts on the belt under the reaction force of the return spring, and the belt may be damaged due to bending and folding under a large reaction force. At the same time, it not only retains the advantages of fast response and suitability for high-speed scenarios of optoelectronic detection devices but also solves the problem that optoelectronic detection devices may be affected by dust, fog, or strong light environments and affect the accuracy.

[0019] 2. In the present invention, the buffer wheel can buffer the offset belt, reduce contact friction, and reduce the contact wear after the belt is offset. At the same time, the buffer wheel is connected to the moving laser detection transmitter in a sliding connection manner, and the moving resistance of the buffer wheel is stable, preventing the belt from being bent and folded under a large reaction force after a large offset.

[0020] 3. In the present invention, the moving laser detection transmitter, the normal operation laser detection receiver, the deviation warning laser detection receiver, and the braking laser detection receiver are all arranged in the sealing box to prevent the situation that dust, fog, or strong light environments may affect the accuracy and ensure the accuracy and stability of belt deviation detection.

[0021] 4. In the present invention, the buffer wheel is set in a form that can be quickly disassembled and assembled, which is convenient for quickly replacing a new buffer wheel later.

[0022] 5. In the present invention, a limiting mechanism for preventing the driving rod from moving away from the sealing box is provided between the driving rod and the sealing box. The advantage of preventing the driving rod from resetting after moving is that when the belt is offset, there may be a reset situation. At this time, the moved driving rod will not reset, and the staff can judge whether the belt has been offset here based on this phenomenon, so as to better adjust the belt later. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the external view of the present invention;

[0024] Figure 2 Internal structure diagram of the present invention;

[0025] Figure 3 Diagram showing the setting mode of the slide rail and slider of the present invention;

[0026] Figure 4 Planar structure diagram of the present invention;

[0027] Figure 5 Structure diagram of the limit mechanism of the present invention;

[0028] Figure 6 Internal structure diagram of the limit mechanism of the present invention;

[0029] Figure 7 Structure diagram of the buffer wheel of the present invention;

[0030] Figure 8 Structure diagram of the transition connecting shaft of the present invention;

[0031] Figure 9 Internal structure diagram of the buffer wheel of the present invention.

[0032] In the figure:

[0033] 1 - Sealing box, 11 - Box cover, 111 - Perspective window, 12 - Support arm, 13 - Slide rail, 14 - Slider, 15 - Axle seat, 16 - Connecting rod, 17 - Driving rod, 171 - Ratchet groove, 18 - Avoidance hole,

[0034] 2 - Buffer wheel, 21 - Transition connecting shaft, 211 - Slot, 22 - Fixed square shaft, 23 - Movable square shaft, 231 - First button, 24 - Accommodation groove, 25 - First spring,

[0035] 31 - Mobile laser detection transmitter, 32 - Normal operation laser detection receiver, 33 - Deviation warning laser detection receiver, 34 - Braking laser detection receiver, 35 - Operation status indicator light, 36 - Normal operation indicator light, 37 - Deviation warning indicator light, 38 - Braking indicator light,

[0036] 4 - Limit mechanism, 41 - Ratchet, 42 - Second button, 43 - Installation shell, 44 - Shell cover, 45 - Second spring. Detailed implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] As Figures 1 to 4 shown, a belt deviation detection device for a belt conveyor includes a sealed box 1. Two support arms 12 are provided on one side of the sealed box 1. The two support arms 12 are arranged vertically and parallel to each other. A buffer wheel 2 with a vertically extending axis is provided between the two support arms 12. The buffer wheel 2 is slidably connected to the support arms 12 through a sliding component. It also includes a driving rod 17 fixedly connected to the buffer wheel 2. The driving rod 17 passes through the sealed box 1 and extends into the interior of the sealed box 1. At the top of the driving rod 17 and inside the sealed box 1, a moving laser detection transmitter 31 is provided. Inside the sealed box 1, a normal operation laser detection receiver 32, a deviation warning laser detection receiver 33, and a braking laser detection receiver 34 are provided corresponding to the moving laser detection transmitter 31 in sequence. Outside the sealed box 1, a normal operation indicator light 36, a deviation warning indicator light 37, and a braking indicator light 38 are also provided. The normal operation indicator light 36, the deviation warning indicator light 37, and the braking indicator light 38 are electrically connected to the normal operation laser detection receiver 32, the deviation warning laser detection receiver 33, and the braking laser detection receiver 34 respectively.

[0039] In this embodiment, the moving laser detection transmitter 31, the normal operation laser detection receiver 32, the deviation warning laser detection receiver 33, the braking laser detection receiver 34, the normal operation indicator light 36, the deviation warning indicator light 37, and the braking indicator light 38 are electrically connected to the controller of the belt conveyor. In the prior art, the belt conveyor usually uses a PLC controller to control its operating state. The above-mentioned laser detection transmitter, laser detection receiver, and indicator light are electrically connected to the PLC. The above-mentioned electrical connection method belongs to the existing conventional technology, and the specific connection method will not be elaborated here.

[0040] When in use, the whole device is fixed to one side of the belt conveyor through fasteners, so that the buffer wheel 2 is close to the belt. Under normal operating conditions, the moving laser detection transmitter 31 is aligned with the normal operating laser detection receiver 32. When the belt of the belt conveyor is misaligned and deviated, the belt contacts the buffer wheel 2 and pushes the buffer wheel 2 to move towards the direction of the sealing box 1. At the same time, the driving rod 17 drives the moving laser detection transmitter 31 to move. When the moving laser detection transmitter 31 is not aligned with the deviation warning laser detection receiver 33, it indicates that the belt may only have a slight deviation, which does not affect the normal transportation operation. The PLC controller of the belt conveyor controls the normal operating indicator light 36 to flash normally. When the belt has a large deviation, the moving laser detection transmitter 31 is aligned with the deviation warning laser detection receiver 33. At this time, it still does not affect the normal operation of the belt conveyor, but there is a deviation trend that may affect the normal operation. At this time, the PLC controller of the belt conveyor controls the deviation warning indicator light 37 to flash, prompting the staff that there is a large deviation in the belt here and there may be a deviation trend that affects the normal operation, facilitating the operators to go to the site for inspection and adjustment in time. When the belt has a huge deviation, so that the moving laser detection transmitter 31 is aligned with the braking laser detection receiver 34, at this time, it affects the normal operation of the belt conveyor. The PLC controller of the belt conveyor controls the belt conveyor to stop operating to prevent operation accidents. At the same time, the PLC controller of the belt conveyor controls the braking indicator light 38 to flash, prompting the staff that the belt conveyor has been forced to stop and the operators are required to repair it immediately.

[0041] In this embodiment, the normal operating laser detection receiver 32 is close to the buffer wheel 2, the braking laser detection receiver 34 is far from the buffer wheel 2, and the deviation warning laser detection receiver 33 is located between the normal operating laser detection receiver 32 and the braking laser detection receiver 34. Since the determination of whether the deviation length corresponding to different widths of the belt affects the normal operation is different, the distance between the normal operating laser detection receiver 32 and the deviation warning laser detection receiver 33 and the distance between the deviation warning laser detection receiver 33 and the braking laser detection receiver 34 can be adaptively determined according to whether the actual belt deviation degree affects the operation.

[0042] As a specific implementation manner, as Figure 3 shown, the sliding assembly includes slide rails 13 respectively arranged on the inner sides of the two support arms 12 (taking the side where the two support arms 12 face each other as the inner side). A slider 14 is slidably fitted on the slide rails 13. A shaft seat 15 is arranged on the slider 14, and the buffer wheel 2 is connected to the shaft seat 15 in a cooperating manner.

[0043] Furthermore, as Figure 1 、 Figure 2 、 Figures 7 - 9As shown, the buffer wheel 2 is connected with the shaft seat 15 through a transition connecting shaft 21. Specifically, a fixed square shaft 22 is provided at the bottom of the buffer wheel 2, and a movable square shaft 23 that can slide up and down is provided at the top of the buffer wheel 2. A first spring 25 for preventing the movable square shaft 23 from moving downward is provided between the movable square shaft 23 and the buffer wheel 2. A slot 211 is provided on the transition connecting shaft 21. The fixed square shaft 22 and the movable square shaft 23 are respectively inserted into the slot 211 of the corresponding transition connecting shaft 21, and the transition connecting shaft 21 is respectively connected with the corresponding shaft seat 15 for rotation.

[0044] In this embodiment, a receiving groove 24 extending up and down is provided on the top of the buffer wheel 2 , the movable square shaft 23 is slidably disposed in the receiving groove 24 , and the first spring 25 is located in the receiving groove 24 .

[0045] The purpose of such design is to realize the quick disassembly and assembly of the buffer wheel 2. When assembling, first press the movable square shaft 23 into the receiving groove 24, then insert the fixed square shaft 22 into the corresponding slot 211 of the transition connecting shaft 21 located below, then release the movable square shaft 23, and under the elastic force of the first spring 25, push the movable square shaft 23 into the corresponding slot 211 of the transition connecting shaft 21 located above. When disassembling, just reverse the above steps.

[0046] To facilitate adjustment of the position of the movable square shaft 23, a first button 231 is provided on one side of the movable square shaft 23, and the top of the first button 231 is lower than the top of the movable square shaft 23. In this way, after the movable square shaft 23 is inserted into the corresponding slot 211, it can be easily detached from the slot 211 by pressing the first button 231.

[0047] The reason for setting the buffer wheel 2 to be quickly disassembled is that friction will be generated when the belt contacts the buffer wheel 2. Long-term friction will cause the buffer wheel 2 to wear and break. Setting the buffer wheel 2 to be quickly disassembled can facilitate the rapid replacement of a new buffer wheel 2 later.

[0048] Furthermore, a limiting mechanism 4 for preventing the driving rod 17 from moving away from the sealing box 1 is provided between the driving rod 17 and the sealing box 1 .

[0049] like Figures 3 - 7As shown, as a specific embodiment, the limiting mechanism 4 includes a mounting shell 43 fixed to the outside of the sealing box 1. Inside the mounting shell 43, there is a ratchet 41 that can slide up and down. The ratchet 41 passes through the mounting shell 43 and extends above the mounting shell 43. Inside the mounting shell 43, there is a second spring 45 for hindering the downward movement of the ratchet 41. At the bottom of the driving rod 17, there are a number of uniformly arranged ratchet grooves 171, and the ratchet 41 is cooperatively connected with the ratchet grooves 171.

[0050] The purpose of such a design is that through the cooperation of the ratchet 41 and the ratchet grooves 171, a relatively small moving resistance can be provided for the driving rod 17, and at the same time, the driving rod 17 can be prevented from resetting after moving. On the premise of not affecting the movement of the buffer wheel 2 and the driving rod 17 when the belt deviates, the working state of the driving rod 17 can be ensured to be stable. The advantage of preventing the driving rod 17 from resetting after moving is that when the belt deviates, there may be a reset situation. At this time, the already moved driving rod 17 will not reset, and the staff can judge whether the belt has deviated here according to this phenomenon, so as to better adjust the belt in the later stage. Providing a relatively small moving resistance for the driving rod 17 is to prevent the belt from folding. This is because traditional mechanical detection usually uses the bending displacement detection method of a swing rod and a spring. The greater the belt deviation amount, the greater the reaction force of the swing rod and the spring. And when the belt is moving at high speed, being subjected to a large reaction force will cause the belt to bend and roll, resulting in damage to the belt.

[0051] In this embodiment, a second button 42 is arranged on one side of the ratchet 41. The top end of the second button 42 is lower than the top end of the ratchet 41. By pressing the second button 42, it is convenient for the ratchet 41 to disengage from the ratchet grooves 171, which is convenient for resetting the working positions of the driving rod 17 and the buffer wheel 2 after the belt deviation is repaired later.

[0052] In this embodiment, the bottom of the mounting shell 43 is sealed by a shell cover 44 to facilitate the installation of the limiting mechanism.

[0053] As a specific embodiment, the two shaft seats 15 are connected by a connecting rod 16 in a transitional manner, and the driving rod 17 is fixedly connected to the connecting rod 16.

[0054] Specifically in this embodiment, an avoidance hole 18 is arranged on the sealing box 1, and the driving rod 17 passes through the avoidance hole 18 and extends into the inside of the sealing box 1.

[0055] Further, an operation status indicator light 35 is also provided in the sealing box 1. The operation status indicator light 35 is composed of three lights which are respectively and electrically connected (specifically in series) to the normal operation laser detection receiver 32, the deviation warning laser detection receiver 33, and the braking laser detection receiver 34, and is used to indicate whether the power-on status is normal, facilitating the staff to determine whether each laser detection receiver can perform normal operations.

[0056] Specifically, in this embodiment, as Figure 1 shown, a box cover 11 is provided on the front side of the sealing box 1. A perspective window 111 is provided on the box cover 11. The perspective window 111 is horizontally arranged corresponding to the operation status indicator light 35, and the operator can directly observe the operation status indicator light 35 through the perspective window 111.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A belt deviation detection device for a belt conveyor, characterized in that: The invention comprises a sealing box (1), wherein two support arms (12) are arranged on one side of the sealing box (1), the two support arms (12) are arranged up and down and parallel to each other, a buffer wheel (2) with an axis extending vertically is arranged between the two support arms (12), the buffer wheel (2) is slidably connected to the support arm (12) through a sliding assembly, and further comprises a driving rod (17) fixed relative to the buffer wheel (2), the driving rod (17) passes through the sealing box (1) and extends to the inside of the sealing box (1), a mobile laser detection transmitter (31) is arranged at the top end of the driving rod (17) and located inside the sealing box (1), and the sealing box (1) A normal operation laser detection receiver (32), a deviation warning laser detection receiver (33) and a brake laser detection receiver (34) are arranged in sequence corresponding to the mobile laser detection transmitter (31); a normal operation indicator light (36), a deviation warning indicator light (37) and a brake indicator light (38) are also arranged outside the sealed box (1); the normal operation indicator light (36), the deviation warning indicator light (37) and the brake indicator light (38) are electrically connected to the normal operation laser detection receiver (32), the deviation warning laser detection receiver (33) and the brake laser detection receiver (34), respectively; A limiting mechanism (4) is also provided between the driving rod (17) and the sealing box (1) for preventing the driving rod (17) from moving away from the sealing box (1); The limiting mechanism (4) comprises a mounting shell (43) fixed to the outside of the sealing box (1); a ratchet (41) which can slide up and down is arranged inside the mounting shell (43); the ratchet (41) passes through the mounting shell (43) and extends to the top of the mounting shell (43); a second spring (45) for preventing the ratchet (41) from moving downward is arranged inside the mounting shell (43); a plurality of evenly arranged ratchet grooves (171) are arranged at the bottom of the driving rod (17); the ratchet (41) is matched and connected with the ratchet grooves (171).

2. A belt deviation detection device for a belt conveyor according to claim 1, characterized in that: The sliding assembly comprises a sliding rail (13) respectively arranged on the inner side of the two support arms (12); a sliding block (14) is slidably matched on the sliding rail (13); an axle seat (15) is arranged on the sliding block (14); and the buffer wheel (2) is cooperatively connected with the axle seat (15).

3. A belt deviation detection device for a belt conveyor according to claim 2, characterized in that: The buffer wheel (2) is cooperatively connected to the shaft seat (15) via a transition connecting shaft (21).

4. A belt deviation detection device for a belt conveyor according to claim 3, characterized in that: A fixed square shaft (22) is arranged at the bottom of the buffer wheel (2), a movable square shaft (23) that can slide up and down is arranged at the top of the buffer wheel (2), a first spring (25) for preventing the movable square shaft (23) from moving downward is arranged between the movable square shaft (23) and the buffer wheel (2), a slot (211) is arranged on the transition connecting shaft (21), the fixed square shaft (22) and the movable square shaft (23) are respectively inserted into the slot (211) of the corresponding transition connecting shaft (21), and the transition connecting shaft (21) is respectively rotatably connected to the corresponding shaft seat (15).

5. The belt deviation detection device for a belt conveyor according to claim 4, characterized in that: The top of the buffer wheel (2) is provided with a receiving groove (24) extending up and down, the movable square shaft (23) is slidably arranged in the receiving groove (24), and the first spring (25) is located in the receiving groove (24).

6. The belt deviation detection device for a belt conveyor according to claim 1, characterized in that: A second button (42) is provided on one side of the ratchet (41), and a top end of the second button (42) is lower than a top end of the ratchet (41).

7. A belt deviation detection device for a belt conveyor according to claim 2, characterized in that: The two shaft seats (15) are transitionally connected via a connecting rod (16), and the driving rod (17) is fixedly connected to the connecting rod (16).

8. The belt deviation detection device for a belt conveyor according to claim 1, characterized in that: An operating status indicator light (35) is also provided in the sealing box (1). The operating status indicator lights (35) are three in number and are electrically connected to the normal operation laser detection receiver (32), the deviation warning laser detection receiver (33) and the braking laser detection receiver (34), respectively.

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