Belt deviation detection device for belt conveyor

Abstract

The invention discloses a belt deviation detection device for a belt conveyor, and relates to the technical field of belt conveyors. The deviation detection device comprises a sealing box, two supporting arms are arranged on one side of the sealing box, the two supporting arms are arranged up and down in parallel, a buffer wheel with the axis vertically extending is arranged between the two supporting arms, and the buffer wheel is in transition connection with the supporting arms through sliding of a sliding assembly. The device further comprises a driving rod fixed relative to the buffer wheel, the driving rod penetrates through the sealing box and extends into the sealing box, and a movable laser detection emitter is arranged at the top end of the driving rod and located in the sealing box. And a normal operation laser detection receiver, a deviation early warning laser detection receiver and a braking laser detection receiver which sequentially correspond to the mobile laser detection transmitter are arranged in the sealing box. The deviation state of the belt is judged through combination of mechanical detection and optical detection, and the detection state is accurate and stable.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyors, in particular to a belt deviation detection device for belt conveyors. Background Art

[0002] Belt conveyor is a key equipment, mainly used for continuous conveying of bulk materials, such as ore, coal, etc. Belt conveyor is mainly composed of conveyor belt (core component for carrying materials, usually made of rubber, PVC and other materials), drive device (including motor, reducer and transmission roller, providing power), roller (supporting conveyor belt, reducing friction, divided into load-bearing and return rollers), tensioning device (maintaining proper tension of conveyor belt to prevent slipping), frame (structure supporting the whole equipment), cleaner (removing materials adhering to conveyor belt), protective device (such as deviation switch, emergency stop switch, etc., to ensure safe operation).

[0003] Belt deviation is a common problem of conveyors, which may cause material spillage, equipment damage or even safety accidents, so belt deviation detection devices are 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 rocker arm or roller of the switch, an alarm or shutdown signal is triggered. Advantages: high detection reliability; Disadvantages: physical contact is required. The rocker arm acts on the belt under the reaction of the reset spring. The belt will bend or curl under the large reaction force, causing 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 environment may affect the accuracy. Summary of the invention

[0006] The object of the present invention is to provide a belt deviation detection device for a belt conveyor, which adopts a combination of a mechanical deviation switch and a photoelectric detection device, thereby retaining the advantages of the mechanical deviation switch being stable and reliable, and solving the disadvantage that the traditional rocker arm acts on the belt under the reaction of a reset spring, and the belt will be bent and coiled under the large reaction force, resulting in damage to the belt; at the same time, it retains the advantages of the photoelectric detection device being fast in response and suitable for high-speed scenes, 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-mentioned purpose, the present invention provides the following technical solutions: a belt deviation detection device for a belt conveyor, comprising a sealing box, two support arms are arranged on one side of the sealing box, the two support arms are arranged up and down and parallel to each other, a buffer wheel with a vertically extending axis is arranged between the two support arms, the buffer wheel is transitionally connected to the support arm by sliding through a sliding assembly, and also includes a driving rod fixed relatively to the buffer wheel, the driving rod passes through the sealing box and extends to the interior of the sealing box, a mobile laser detection transmitter is arranged at the top of the driving rod and located in the sealing box, a normal operation laser detection receiver, a deviation warning laser detection receiver and a braking laser detection receiver corresponding to the mobile laser detection transmitter in sequence are arranged in the sealing box, a normal operation indicator light, a deviation warning indicator light and a braking indicator light are also arranged on the outside of the sealing box, and 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 assembly includes sliding rails respectively arranged on the inner sides of the two support arms, a slider is slidably fitted on the sliding rail, an axle seat is arranged on the slider, and the buffer wheel is cooperatively connected with the axle seat.

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

[0010] Preferably, a fixed square shaft is provided at the bottom of the buffer wheel, a movable square shaft which can slide up and down is provided at the top of the buffer wheel, a first spring for preventing the movable square shaft from moving downward is provided between the movable square shaft and the buffer wheel, a slot is provided on the transition connecting shaft, the fixed square shaft and the movable square shaft are respectively inserted into the slots of the corresponding transition connecting shaft, and the transition connecting shaft is respectively rotatably connected with the corresponding shaft seat.

[0011] Preferably, a receiving groove extending up and down is provided on the top of the buffer wheel, the movable square shaft is slidably arranged in the receiving groove, and the first spring is located in the receiving groove.

[0012] Preferably, a limiting mechanism for preventing the driving rod from moving away from the sealing box is further provided between the driving rod and the sealing box.

[0013] Preferably, the limiting mechanism includes a mounting shell fixed to the outside of the sealing box, the mounting shell is provided with a ratchet that can slide up and down, the ratchet passes through the mounting shell and extends to the top of the mounting shell, the mounting shell is provided with a second spring for preventing the ratchet from moving downward, and the bottom of the driving rod is provided with a plurality of evenly arranged ratchet grooves, and the ratchet is cooperatively connected with the ratchet grooves.

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

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

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

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a combination of a mechanical deviation switch and a photoelectric detection device, which not only retains the advantages of the mechanical deviation switch being stable and reliable, but also solves the disadvantage that the traditional rocker arm acts on the belt under the reaction of the return spring, and the belt will be bent and folded due to a large reaction force, resulting in damage to the belt; at the same time, it retains the advantages of the photoelectric detection device being fast in response and suitable for high-speed scenes, and solves the disadvantage that the photoelectric detection device may affect the accuracy in dust, fog or strong light environments.

[0018] 2. In the present invention, the buffer wheel can buffer the deviated belt, reduce contact friction, and reduce contact wear after the belt is deviated. At the same time, the buffer wheel is connected to the mobile laser detection transmitter by a sliding connection method. The moving resistance of the buffer wheel is stable, which prevents the belt from bending and folding due to a large reaction force after a large deviation.

[0019] 3. In the present invention, the mobile laser detection transmitter, the normal operation laser detection receiver, the deviation warning laser detection receiver and the brake laser detection receiver are all arranged in a sealed box to prevent dust, fog or strong light environment from affecting the accuracy, thereby ensuring the accuracy and stability of the belt deviation detection.

[0020] 4. The present invention arranges the buffer wheel in a form of quick disassembly and assembly, which can facilitate quick replacement of a new buffer wheel at a later time.

[0021] 5. In the present invention, a limiting mechanism is provided between the driving rod and the sealing box to prevent the driving rod from moving away from the sealing box. The advantage of preventing the driving rod from resetting after moving is that when the belt is offset, a reset may occur. At this time, the driving rod that has moved will not reset. 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

[0022] Figure 1 This is an appearance diagram of the present invention; Figure 2 It is the internal structure diagram of the present invention; Figure 3 A diagram showing the arrangement of the slide rail and the slider of the present invention; Figure 4 It is a planar structural diagram of the present invention; Figure 5 It is a structural diagram of the limiting mechanism of the present invention; Figure 6 It is the internal structure diagram of the limiting mechanism of the present invention; Figure 7 It is a structural diagram of the buffer wheel of the present invention; Figure 8 It is a structural diagram of the transition connecting shaft of the present invention; Fig. 9 It is the internal structure diagram of the buffer wheel of the present invention.

[0023] In the figure: 1-sealed 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, 2-buffer wheel, 21-transition connecting shaft, 211-slot, 22-fixed square shaft, 23-movable square shaft, 231-first button, 24-accommodating groove, 25-first spring, 31-mobile laser detection transmitter, 32-normal operation laser detection receiver, 33-deviation warning laser detection receiver, 34-brake laser detection receiver, 35-operation status indicator, 36-normal operation indicator, 37-deviation warning indicator, 38-brake indicator, 4-limiting mechanism, 41-ratchet, 42-second button, 43-installation shell, 44-shell cover, 45-second spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 4As shown, a belt deviation detection device for a belt conveyor includes a sealing box 1, one side of the sealing box 1 is provided with two support arms 12, the two support arms 12 are arranged up and down 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 transitionally connected to the support arm 12 by sliding through a sliding assembly, and also includes a driving rod 17 fixed relatively 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 provided at the top of the driving rod 17 and is located in the sealing box 1, a normal operation laser detection receiver 32, a deviation warning laser detection receiver 33 and a braking laser detection receiver 34 corresponding to the mobile laser detection transmitter 31 are provided in the sealing box 1, and a normal operation indicator light 36, a deviation warning indicator light 37 and a braking indicator light 38 are also provided on the outside of the sealing box 1, and 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.

[0026] In this embodiment, the mobile laser detection transmitter 31, the normal operation laser detection receiver 32, the deviation warning laser detection receiver 33, the brake laser detection receiver 34, the normal operation indicator light 36, the deviation warning indicator light 37, and the brake 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 status. 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 described in detail here.

[0027] When in use, the device is fixed to one side of the belt conveyor by fasteners, so that the buffer wheel 2 is close to the belt. Under normal operation, the mobile laser detection transmitter 31 is aligned with the normal operation laser detection receiver 32. When the belt conveyor has a misaligned belt, the belt contacts the buffer wheel 2 and pushes the buffer wheel 2 to move toward the sealing box 1. At the same time, the driving rod 17 drives the mobile laser detection transmitter 31 to move. When the mobile laser detection transmitter 31 is not aligned with the deviation warning laser detection receiver 33, it indicates that the belt may have only slightly deviated and does not affect the normal transportation operation. The PLC controller of the belt conveyor controls the normal operation indicator 36 to flash normally. When the belt has a large deviation, the mobile laser detection transmitter 31 is aligned with the deviation warning laser detection receiver 33. At this time, the normal operation of the belt conveyor is still not affected, but there is a deviation trend that affects the normal operation. At this time, the PLC controller of the belt conveyor controls the deviation warning indicator 37 to flash, reminding the staff that the belt here has a large deviation and there may be a deviation trend that affects the normal operation, so that the operating personnel can go to the site for inspection and adjustment in time. When the belt has a huge deviation, so that the mobile laser detection transmitter 31 is aligned with the brake laser detection receiver 34, the normal operation of the belt conveyor is affected. The PLC controller of the belt conveyor controls the belt conveyor to stop operating to prevent operating accidents. At the same time, the PLC controller of the belt conveyor controls the brake indicator light 38 to flash, prompting the staff that the belt conveyor has been forced to stop and the operator needs to repair it immediately.

[0028] In this embodiment, the normal operation laser detection receiver 32 is close to the buffer wheel 2, the brake laser detection receiver 34 is far away from the buffer wheel 2, and the deviation warning laser detection receiver 33 is located between the normal operation laser detection receiver 32 and the brake laser detection receiver 34. Since the judgment of whether the deviation length corresponding to the belt of different widths affects the normal operation is different, the spacing between the normal operation laser detection receiver 32 and the deviation warning laser detection receiver 33, and the spacing between the deviation warning laser detection receiver 33 and the brake laser detection receiver 34 can be adaptively determined according to whether the actual belt deviation degree affects the operation.

[0029] As a specific implementation method, Figure 3 As shown, the sliding assembly includes a slide rail 13 respectively arranged on the inner side of the two support arms 12 (the inner side is the side opposite to the two support arms 12), a slider 14 is slidably fitted on the slide rail 13, an axle seat 15 is provided on the slider 14, and the buffer wheel 2 is cooperatively connected with the axle seat 15.

[0030] Furthermore, if Figure 1 , Figure 2 , Figure 7-Figure 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.

[0031] 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 .

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 .

[0036] like Figure 3-Figure 7As shown, as a specific embodiment, the limiting mechanism 4 includes a mounting shell 43 fixed to the outside of the sealing box 1, and the interior of the mounting shell 43 is provided with a ratchet 41 that can slide up and down, and the ratchet 41 passes through the mounting shell 43 and extends to the top of the mounting shell 43, and the mounting shell 43 is provided with a second spring 45 for preventing the ratchet 41 from moving downward, and the bottom of the driving rod 17 is provided with a plurality of evenly arranged ratchet grooves 171, and the ratchet 41 is matched and connected with the ratchet grooves 171.

[0037] The purpose of such design is that, through the cooperation between the ratchet 41 and the ratchet groove 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, and the working state of the driving rod 17 can be ensured to be stable without affecting the belt deviation, while the buffer wheel 2 and the driving rod 17 can be pushed to move. The advantage of preventing the driving rod 17 from resetting after moving is that when the belt is offset, there may be a reset situation. At this time, the driving rod 17 that has been moved will not be reset. The staff can judge whether the belt has been offset here based on this phenomenon, so as to better adjust the belt later. 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 adopts the bending displacement detection method of the swing rod and the spring. The greater the belt deviation, the greater the reaction force of the swing rod and the spring. When the belt moves at high speed, it will bend and fold under the large reaction force, resulting in damage to the belt.

[0038] In this embodiment, a second button 42 is provided on one side of the ratchet 41, and the top of the second button 42 is lower than the top of the ratchet 41. By pressing the second button 42, the ratchet 41 can be disengaged from the ratchet groove 171, which is convenient for resetting the driving rod 17 and the buffer wheel 2 after the belt deviates from the maintenance.

[0039] 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.

[0040] As a specific implementation manner, 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 .

[0041] Specifically in this embodiment, the sealing box 1 is provided with an avoidance hole 18 , and the driving rod 17 passes through the avoidance hole 18 and penetrates into the interior of the sealing box 1 .

[0042] Furthermore, an operation status indicator light 35 is also provided in the sealing box 1. The operation 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, specifically in series, to display whether the power-on status is normal, so as to facilitate the staff to judge whether each laser detection receiver can operate normally.

[0043] Specifically in this embodiment, Figure 1 As shown, a box cover 11 is provided on the front side of the sealing box 1 , and a perspective window 111 is provided on the box cover 11 . The perspective window 111 is arranged horizontally 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 .

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A belt deviation detection device for a belt conveyor, characterized in that: The invention comprises a sealing box (1), wherein one side of the sealing box (1) is provided with two support arms (12), 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 provided between the two support arms (12), the buffer wheel (2) is slidably transitionally connected to the support arm (12) via 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 provided at the top end of the driving rod (17) and is located inside the sealing box (1), and the sealing A normal operation laser detection receiver (32), a deviation warning laser detection receiver (33) and a brake laser detection receiver (34) which correspond to the mobile laser detection transmitter (31) in sequence are arranged in the sealed box (1); 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.

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 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).

7. A belt deviation detection device for a belt conveyor according to claim 6, characterized in that: 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).

8. A belt deviation detection device for a belt conveyor according to claim 7, 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).

9. The 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).

10. 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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