A misalignment detection device installed on the outside of an enclosed conveyor

Abstract

This utility model relates to a belt misalignment detection device installed outside an enclosed conveyor. It includes a fixed bracket, a belt misalignment switch body, a transmission mechanism, and a detection component. The belt misalignment switch body is fixedly installed on the outside of the enclosed conveyor via the fixed bracket. The transmission mechanism includes a fixed sleeve, a movable sleeve, and a threaded rod. The fixed sleeve is installed on the outside of the enclosed conveyor, and the movable sleeve is slidably connected to the inner wall of the fixed sleeve. The threaded rod is threadedly connected to the inner wall of the movable sleeve, with one end of the threaded rod penetrating into the enclosed conveyor and connecting to the detection component. The detection component contacts the edge of the conveyor belt. A hemispherical sealing cover is provided on the side of the movable sleeve near the belt misalignment switch body, and the sealing cover contacts the detection rod of the belt misalignment switch body. This utility model, with its main body installed outside the conveyor, significantly reduces explosion-proof requirements and equipment costs, makes inspection and maintenance more convenient and safe, and features a sensitive and reliable overall structure. It is suitable for harsh industrial environments and has good practicality and economy.

Description

Technical Field

[0001] This utility model relates to the field of conveyor installation, and in particular to a misalignment detection device installed on the outside of an enclosed conveyor. Background Technology

[0002] During operation, existing enclosed conveyors are prone to belt misalignment due to uneven load, idler wear, and uneven material distribution. Misalignment not only leads to material spillage and accelerated belt wear, but in severe cases, it can cause equipment shutdown or even safety accidents. Currently, to prevent the hazards caused by misalignment, misalignment switches are typically installed inside the conveyor for detection. When the belt misalignment exceeds the allowable range, the misalignment switch triggers a signal, and the control system stops the conveyor.

[0003] However, due to the confined space and high dust concentration inside enclosed conveyors, which fall under Zone 20 (explosive dust environment), high-explosion-proof belt misalignment switches must be installed, significantly increasing equipment costs. Furthermore, installing, debugging, and maintaining these switches in the confined space is extremely inconvenient, requiring operators to enter the equipment, posing safety hazards. The internally installed detection device is close to the belt, easily causing friction, accelerating belt wear, and potentially damaging the device itself. If the installed belt misalignment switch has an insufficient explosion-proof rating or is not properly sealed, operation in a dusty environment can easily lead to safety accidents. Therefore, there is an urgent need for a detection device that can effectively detect belt misalignment while reducing explosion-proof requirements and facilitating installation and maintenance. Summary of the Invention

[0004] The present invention aims to address the shortcomings of the prior art by providing a misalignment detection device that is installed on the outside of an enclosed conveyor.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a belt misalignment detection device installed outside a closed conveyor, comprising a fixed bracket, a belt misalignment switch body, a transmission mechanism, and a detection component. The belt misalignment switch body is fixedly installed on the outside of the closed conveyor via the fixed bracket. The transmission mechanism includes a fixed sleeve, a movable sleeve, and a threaded rod. The fixed sleeve is installed on the outside of the closed conveyor. The movable sleeve is slidably connected to the inner wall of the fixed sleeve. The threaded rod is threadedly connected to the inner wall of the movable sleeve, and one end of the threaded rod penetrates into the interior of the closed conveyor and is connected to the detection component. The detection component contacts the edge of the conveyor belt. A hemispherical sealing cover is provided on the side of the movable sleeve near the belt misalignment switch body, and the sealing cover contacts the detection rod of the belt misalignment switch body.

[0006] In particular, the casing of the deviation switch is an explosion-proof casing.

[0007] Specifically, the fixed bracket is installed on the outside of the enclosed conveyor by bolts, and a pair of connecting plates are provided on one side of the casing of the misalignment switch. The fixed bracket is provided with several adjustment holes, and the connecting plates are connected to the adjustment holes of the fixed bracket by bolts.

[0008] Specifically, the misalignment switch body is equipped with a cable inlet hole with a sealing ring on the inner wall, which is used to introduce the cable and prevent dust and moisture from entering, and the cable is connected to the control center.

[0009] Specifically, the detection component includes a fixed column and a movable column rotatably connected to the top and bottom of the fixed column. A threaded rod is fixedly connected to the fixed column, and the movable column contacts the edge of the conveyor belt and rolls with the conveyor belt.

[0010] The beneficial effects of this utility model are:

[0011] Reduced explosion-proof requirements and costs: The belt misalignment switch is installed outside the conveyor, significantly reducing the dust concentration in the environment. The explosion-proof zone is changed from Zone 20 to Zone 21, allowing the use of equipment with lower explosion-proof requirements, which greatly reduces procurement costs.

[0012] Convenient and safe installation and maintenance: All major components are located on the outside of the equipment, eliminating the need to enter the narrow and dangerous interior of the conveyor for installation, commissioning, or maintenance. The ample operating space greatly improves work efficiency and operational safety.

[0013] Reduce belt wear: The movable column at the end of the detection component can roll with the belt, changing sliding friction into rolling friction, which effectively avoids scratches and wear on the belt surface and extends the belt's service life.

[0014] Sensitive and reliable detection: The adjustable transmission mechanism, connected by a threaded rod, accurately transmits the belt misalignment to the external belt misalignment switch, ensuring accurate triggering signals and a low false alarm rate. The movable sleeve design within the transmission mechanism ensures independent, linear, and reliable operation.

[0015] Good environmental adaptability: The cable inlet hole adopts a sealed design, and the body of the deviation switch adopts an explosion-proof shell, which ensures the long-term stable operation and electrical safety of the device in harsh industrial environments.

[0016] Flexible adjustment: The adjustable holes on the fixed bracket and the adjustable connection between the detection component and the threaded rod allow for flexible adjustment of the detection position and deviation alarm threshold according to the actual site conditions, making it widely applicable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] In the diagram: 1-Fixed bracket; 2-Misalignment switch body; 21-Detection rod; 22-Connecting plate; 23-Cable inlet hole; 3-Transmission mechanism; 31-Fixed sleeve; 32-Modible sleeve; 33-Threaded rod; 4-Detection component; 41-Fixed column; 42-Modible column;

[0020] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] like Figures 1-2 As shown, a misalignment detection device installed outside an enclosed conveyor includes a fixed bracket 1, a misalignment switch body 2, a transmission mechanism 3, and a detection component 4. The misalignment switch body 2 is fixedly installed on the outside of the enclosed conveyor via the fixed bracket 1. The fixed bracket 1 is bolted to the outside of the enclosed conveyor. A pair of connecting plates 22 are provided on one side of the outer shell of the misalignment switch body 2. The fixed bracket 1 has several adjustment holes, and the connecting plates 22 are bolted to the adjustment holes of the fixed bracket 1. First, according to the outer shell structure of the enclosed conveyor and the predetermined installation position, the fixed bracket 1 is firmly installed on the outer wall panel of the conveyor using bolts. Then, the misalignment switch body 2 is aligned with the adjustment holes on the fixed bracket 1 via the connecting plates 22 and initially fixed using bolts. By selecting different adjustment holes, the installation height of the misalignment switch body 2 can be adjusted so that its detection rod 21 is in the optimal working position. After adjustment, all bolts are tightened.

[0023] The conveyor belt misalignment switch body 2 has an explosion-proof housing. The switch body 2 features a cable inlet hole 23 with a sealing ring on the inner wall, used to introduce the cable and prevent dust and moisture intrusion. The cable connects to the control center, ensuring long-term stable operation and electrical safety of the device in harsh industrial environments. The switch body 2 is installed outside the conveyor, significantly reducing the dust concentration in the surrounding environment. This allows for a change in the explosion-proof zone from Zone 20 to Zone 21, enabling the use of equipment with lower explosion-proof requirements and significantly reducing procurement costs.

[0024] The transmission mechanism 3 includes a fixed sleeve 31, a movable sleeve 32, and a threaded rod 33. The fixed sleeve 31 is installed on the outside of the enclosed conveyor. The movable sleeve 32 is slidably connected to the inner wall of the fixed sleeve 31 (a sliding rod can be provided on the outer wall of the movable sleeve 32, and a sliding groove matching the sliding rod can be provided on the inner wall of the fixed sleeve 31 to prevent the movable sleeve 32 from rotating). The threaded rod 33 is threadedly connected to the inner wall of the movable sleeve 32, and one end of the threaded rod 33 passes into the interior of the enclosed conveyor and is connected to the detection component 4. The detection component 4 contacts the edge of the conveyor belt. The movable sleeve 33 is provided with a hemispherical sealing cover on the side near the misalignment switch body 2, and the sealing cover contacts the detection rod 21 of the misalignment switch body 2.

[0025] The fixed sleeve 31 is bolted to the pre-drilled mounting holes on the conveyor housing, ensuring its axis is substantially perpendicular to the expected belt misalignment direction. The movable sleeve 32 with the sealing cover is then inserted into the fixed sleeve 31. The threaded rod 33 is then screwed into the internal thread of the movable sleeve 32. Inside the conveyor, by rotating the threaded rod 33, the initial contact position between the detection component 4 and the belt edge can be precisely adjusted, thereby setting the misalignment detection threshold.

[0026] All major components are located on the outside of the equipment, eliminating the need to enter the narrow and dangerous interior of the conveyor for installation, commissioning, or maintenance. Ample operating space significantly improves work efficiency and safety. The adjustable transmission mechanism 3, connected via threaded rod 33, precisely transmits belt misalignment displacement to the external belt misalignment switch body 2, ensuring accurate triggering signals and a low false alarm rate. The movable sleeve 32 within the transmission mechanism 3 ensures independent, linear, and reliable operation.

[0027] The detection component 4 includes a fixed column 41 and a movable column 42 rotatably connected to the top and bottom of the fixed column 41. A threaded rod 33 is fixedly connected to the fixed column 41. The movable column 42 contacts the edge of the conveyor belt and rolls with the conveyor belt. The movable column 42 at the end of the detection component 4 can roll with the belt, changing sliding friction into rolling friction, effectively avoiding scratches and wear on the belt surface and extending the service life of the belt.

[0028] When this invention is in operation, the conveyor belt is running normally, and its edge is in slight contact with or maintains a very small gap with the movable column 42 of the detection component 4. The movable column 42 rolls with the belt. When belt misalignment occurs, the belt shifts to one side, pushing the detection component 4 and the threaded rod 33 connected to it outward. The threaded rod 33 pushes the movable sleeve 32 to slide within the fixed sleeve 31, and the hemispherical sealing cover at the end of the movable sleeve 32 presses against the detection rod 21 of the misalignment switch body 2. When the offset reaches a set threshold, the detection rod 21 is pressed in a certain stroke, triggering the microswitch inside the misalignment switch body 2, changing its state and generating a switching electrical signal. This signal is transmitted to the control center via cable, and the control center issues an alarm or shutdown command according to a preset program, thereby protecting the equipment. When the belt returns to its normal position, the detection rod 21, the movable sleeve 32, and the detection component 4 automatically reset under the action of the internal reset mechanism (such as a spring) of the misalignment switch, waiting for the next detection.

[0029] This utility model installs the main body of the belt misalignment detection device on the outside of a closed conveyor, which significantly reduces explosion-proof requirements and equipment costs; the external installation method makes inspection and maintenance more convenient and safe; the detection component 4 adopts a rolling contact design, which effectively reduces belt wear; the overall structure is sensitive and reliable, suitable for harsh industrial environments, and has good practicality and economy.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A misalignment detection device installed outside a closed conveyor, characterized by, The device includes a fixed bracket (1), a misalignment switch body (2), a transmission mechanism (3), and a detection component (4). The misalignment switch body (2) is fixedly installed on the outside of the enclosed conveyor via the fixed bracket (1). The transmission mechanism (3) includes a fixed sleeve (31), a movable sleeve (32), and a threaded rod (33). The fixed sleeve (31) is installed on the outside of the enclosed conveyor. The movable sleeve (32) is slidably connected to the inner wall of the fixed sleeve (31). The threaded rod (33) is threadedly connected to the inner wall of the movable sleeve (32), and one end of the threaded rod (33) is inserted into the inside of the enclosed conveyor and connected to the detection component (4). The detection component (4) is in contact with the edge of the conveyor belt. The movable sleeve (32) is provided with a hemispherical sealing cover on the side near the misalignment switch body (2), and the sealing cover is in contact with the detection rod (21) of the misalignment switch body (2).

2. A misalignment detection device installed outside a closed conveyor according to claim 1, characterized in that, The casing of the misalignment switch body (2) is an explosion-proof casing.

3. A misalignment detection device installed outside a closed conveyor according to claim 1, wherein The fixed bracket (1) is installed on the outside of the enclosed conveyor by bolts. The body of the deviation switch (2) has a pair of connecting plates (22) on one side of the housing. The fixed bracket (1) has several adjustment holes. The connecting plates (22) are connected to the adjustment holes of the fixed bracket (1) by bolts.

4. The misalignment detection device installed outside the enclosed conveyor according to claim 1, wherein The main body (2) of the deviation switch is provided with a cable inlet hole (23) with a sealing rubber ring on the inner wall, which is used to introduce the cable and prevent dust and moisture from entering, and the cable is connected to the control center.

5. A misalignment detection device installed outside an enclosed conveyor according to claim 1, characterized in that, The detection component (4) includes a fixed column (41) and a movable column (42) rotatably connected to the top and bottom of the fixed column (41). The threaded rod (33) is fixedly connected to the fixed column (41), and the movable column (42) contacts the edge of the conveyor belt and rolls with the conveyor belt.

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