Conveying device

Abstract

The utility model provides a conveying device. The conveying device comprises a conveying frame and a conveying belt, the conveying belt is arranged on the conveying frame in a sleeving mode, the conveying belt can move around the conveying frame, and the conveying belt is provided with an upper conveying face and a lower conveying face which are oppositely arranged; the first protection assembly is arranged on the conveying frame and comprises a first detection piece, a steel wire rope and a first alarm piece, the steel wire rope is located between the upper conveying face and the lower conveying face, a gap is formed between the steel wire rope and the upper conveying face, and the steel wire rope extends in the width direction of the conveying belt; the first detection piece is used for detecting displacement of the steel wire rope in the extending direction of the conveying belt and electrically connected with the first alarm piece, and the first alarm piece gives an alarm according to a detection signal of the first detection piece. By the adoption of the scheme, the problem that in the prior art, after the tips of large sundries on the conveying belt pierce the conveying belt, more timely and sensitive monitoring and judgment cannot be conducted, and consequently the longitudinal tearing condition of the conveying belt continuously occurs can be solved.

Description

Technical Field

[0001] This utility model relates to the field of transportation technology, and more specifically, to a conveying device. Background Technology

[0002] The existing three-in-one longitudinal tear protection structure triggers a proximity switch to stop the conveyor when a longitudinal tear occurs. This is achieved through three methods: debris or the edge of the torn conveyor belt touching the debris barrier, coal spilling from the tear and accumulating on the coal receiving platform, or coal spilling along the bottom belt and touching the coal retaining plate. However, the existing three-in-one longitudinal tear protection has a lag and cannot provide timely and sensitive monitoring and judgment when the sharp point of a large piece of debris punctures the conveyor belt, resulting in continuous longitudinal tearing of the conveyor belt. Utility Model Content

[0003] This invention provides a conveying device to solve the problem in the prior art that it cannot monitor and judge the conveyor belt more promptly and sensitively after large debris on the conveyor belt punctures the conveyor belt, resulting in the continuous longitudinal tearing of the conveyor belt.

[0004] This utility model provides a conveying device, which includes: a conveyor frame; a conveyor belt sleeved on the conveyor frame, the conveyor belt being movable around the conveyor frame, the conveyor belt having an upper conveying surface and a lower conveying surface arranged opposite to each other; and a first protection component disposed on the conveyor frame, the first protection component including a first detection element, a steel wire rope, and a first alarm element, the steel wire rope being located between the upper and lower conveying surfaces, with a gap between the steel wire rope and the upper conveying surface, the steel wire rope extending along the width direction of the conveyor belt, the first detection element being used to detect the displacement of the steel wire rope in the extension direction of the conveyor belt, the first detection element being electrically connected to the first alarm element, and the first alarm element providing an alarm reminder based on the detection signal from the first detection element.

[0005] Furthermore, the conveying device also includes: a drive unit connected to the conveyor belt, which drives the conveyor belt to move; a first detection unit electrically connected to the drive unit, which performs stop or start operations based on the detection signal from the first detection unit.

[0006] Furthermore, the distance between the wire rope and the upper conveying surface in the height direction is 30mm to 50mm.

[0007] Furthermore, the conveying device includes a plurality of first protective components, which are spaced apart on the conveyor frame along the extension direction of the conveyor belt.

[0008] Furthermore, the conveying device also includes a second protection component, which is disposed on the conveyor frame. The second protection component includes a first swing frame, a second detection element, and a second alarm element. The first swing frame is located between the upper conveying surface and the lower conveying surface. The first swing frame is rotatably disposed on the conveyor frame and extends along the width direction of the conveyor belt. The first swing frame has a first abutment end and a first sensing end disposed opposite each other in the vertical direction. Both the first abutment end and the first sensing end are rotatable relative to the rotation axis of the first swing frame. The first abutment end is disposed close to the upper conveying surface. The second detection element is capable of detecting the position of the first sensing end. The second detection element is electrically connected to the second alarm element, and the second alarm element provides an alarm reminder based on the detection signal of the second detection element.

[0009] Furthermore, the conveying device also includes a third protection component, which is disposed on the conveyor frame. The third protection component includes a second swing frame, a third detection element, and a third alarm element. The second swing frame is located between the upper conveying surface and the lower conveying surface. The second swing frame is rotatably disposed on the conveyor frame and extends along the width direction of the conveyor belt. The second swing frame has a second abutment end and a second sensing end disposed opposite each other in the vertical direction. Both the second abutment end and the second sensing end are rotatable relative to the rotation axis of the second swing frame. The second abutment end is disposed close to the lower conveying surface. The third detection element is capable of detecting the position of the second sensing end. The third detection element is electrically connected to the third alarm element, and the third alarm element provides an alarm reminder based on the detection signal of the third detection element.

[0010] Furthermore, the rotation axes of the first swing frame and the second swing frame are coaxially arranged.

[0011] Furthermore, the conveying device also includes a fourth protection component, which is installed on the conveyor frame. The fourth protection component includes a movable frame, a fourth detection element, and a fourth alarm element. The movable frame is located between the upper conveying surface and the lower conveying surface. The movable frame moves in the same direction as the conveyor belt and extends along the width direction of the conveyor belt. The fourth detection element can detect the position of the movable frame. The fourth detection element is electrically connected to the fourth alarm element, and the fourth alarm element provides an alarm reminder based on the detection signal from the fourth detection element.

[0012] Furthermore, the conveying device includes a plurality of second protection components, which are spaced apart along the moving direction of the conveyor belt; and / or, the conveying device includes a plurality of third protection components, which are spaced apart along the moving direction of the conveyor belt.

[0013] Furthermore, the first alarm component includes an alarm indicator light and a speaker.

[0014] Applying the technical solution of this utility model, the conveyor belt is precisely fitted onto the conveyor frame. The upper conveying surface of the conveyor belt carries the material, while the lower conveying surface faces the conveyor frame. The conveyor belt has sufficient wear resistance and strength to withstand long-term material transportation. The first protection component includes a first detection element, a steel wire rope, and a first alarm element. The steel wire rope is located on the underside of the conveyor belt, between the lower and upper conveying surfaces, extending along the width of the conveyor belt and covering the entire width to ensure that penetration at any point on the conveyor belt can be detected. Both ends of the steel wire rope are firmly fixed to the conveyor frame, while the middle portion maintains a certain degree of slack to allow displacement under external force. The first detection element is installed on one side of the steel wire rope and can detect the displacement changes of the steel wire rope in the extension direction of the conveyor belt in real time. When an object penetrates the conveyor belt and touches the steel wire rope, the displacement of the steel wire rope will be captured by the first detection element. The first alarm device is electrically connected to the first detection device. When the first detection device detects a change in the displacement of the wire rope, the first alarm device will immediately activate, emitting an audible and visual alarm signal to remind the operator that the conveyor belt may be damaged and that the machine needs to be stopped immediately for inspection. This allows for timely and sensitive monitoring and judgment of the conveyor belt's penetration condition, preventing the conveyor belt from continuously tearing. Attached Figure Description

[0015] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 A cross-sectional view of the conveying device provided by this utility model is shown.

[0017] The above figures include the following reference numerals:

[0018] 10. Conveyor frame;

[0019] 20. Conveyor belt;

[0020] 21. Upper conveyor surface;

[0021] 22. Lower conveyor surface;

[0022] 30. First protection component;

[0023] 31. First inspection piece;

[0024] 32. Steel wire rope. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] like Figure 1 As shown, this embodiment of the present invention provides a conveying device, which includes a conveyor frame 10, a conveyor belt 20, and a first protective component 30. The conveyor belt 20 is sleeved on the conveyor frame 10 and can move around the conveyor frame 10. The conveyor belt 20 has an upper conveying surface 21 and a lower conveying surface 22 that are arranged opposite to each other. The first protective component 30 is disposed on the conveyor frame 10 and includes a first detection element 31, a steel wire rope 32, and a first alarm element. The steel wire rope 32 is located between the upper conveying surface 21 and the lower conveying surface 22, and there is a gap between the steel wire rope 32 and the upper conveying surface 21. The steel wire rope 32 extends along the width direction of the conveyor belt 20. The first detection element 31 is used to detect the displacement of the steel wire rope 32 in the extension direction of the conveyor belt 20. The first detection element 31 is electrically connected to the first alarm element, and the first alarm element provides an alarm reminder based on the detection signal of the first detection element 31.

[0027] Applying the technical solution of this utility model, the conveyor belt 20 is precisely fitted onto the conveyor frame 10. The upper conveying surface 21 of the conveyor belt 20 is used to carry materials, while the lower conveying surface 22 faces the conveyor frame 10. The conveyor belt 20 has sufficient wear resistance and strength to withstand long-term material transportation. The first protection component 30 includes a first detection element 31, a steel wire rope 32, and a first alarm element. The steel wire rope 32 is located on the underside of the conveyor belt 20, between the lower conveying surface 22 and the upper conveying surface 21, extending along the width direction of the conveyor belt 20 and covering the entire width of the conveyor belt 20 to ensure that penetration at any point on the conveyor belt 20 can be detected. The two ends of the steel wire rope 32 are firmly fixed to the conveyor frame 10, and the middle part maintains a certain degree of slack so that displacement can occur when subjected to external force. The first detection element 31 is installed on one side of the wire rope 32 and can detect the displacement change of the wire rope 32 in the extension direction of the conveyor belt 20 in real time. When an object penetrates the conveyor belt 20 and touches the wire rope 32, the displacement of the wire rope 32 will be captured by the first detection element 31. The first alarm element is electrically connected to the first detection element 31. When the first detection element 31 detects that the displacement change of the wire rope 32 exceeds a preset threshold, the first alarm element will be activated immediately, emitting an audible and visual alarm signal to remind the operator that the conveyor belt 20 may be damaged and that the machine needs to be stopped immediately for inspection. In this way, the penetration status of the conveyor belt 20 can be monitored and judged in a timely and sensitive manner, avoiding the continuous longitudinal tearing of the conveyor belt 20.

[0028] Furthermore, the conveying device also includes a drive unit, which is drivenly connected to the conveyor belt 20. The drive unit drives the conveyor belt 20 to move. The first detection element 31 is electrically connected to the drive unit, and the drive unit stops or starts based on the detection signal from the first detection element 31. In this embodiment, the drive unit establishes a stable mechanical drive connection with the conveyor belt 20 through a reducer and a transmission roller to ensure that power can be smoothly and efficiently transmitted to the conveyor belt 20. Below the conveyor belt 20, a steel wire rope 32 is installed along the running direction of the conveyor belt 20, and the first detection element 31 is installed on one side of the steel wire rope 32 so that the drive unit can issue a stop or start command based on the status of the first detection element 31.

[0029] Furthermore, the distance between the wire rope 32 and the upper conveying surface 21 in the height direction is 30mm to 50mm. In this embodiment, the wire rope 32 is located on the lower side of the upper belt of the conveyor belt 20 and perpendicular to the running direction of the conveyor belt 20. The distance between the wire rope 32 and the upper conveying surface 21 in the height direction is set to 30mm to 50mm. This position ensures that the wire rope 32 can closely follow the movement of the conveyor belt 20, while avoiding direct contact with the conveyor belt 20, thus avoiding unnecessary wear.

[0030] In actual operation, when the conveyor belt 20 is pierced and broken by a sharp iron object, the drooping part of the conveyor belt 20 at the broken point or the piercing object will touch the steel wire rope 32 below, causing the steel wire rope 32 to shift, which in turn triggers the pull rope protection switch. The conveyor belt 20 immediately stops running to prevent the tear from spreading further. At the same time, the three-in-one longitudinal tear protection will also be activated, providing double protection measures to ensure the safe operation of the belt conveyor.

[0031] Furthermore, the conveying device includes a plurality of first protection components 30, which are spaced apart on the conveyor frame 10 along the extension direction of the conveyor belt 20. In this embodiment, each first protection component 30 includes a wire rope 32, a first detection element 31, and a first alarm element. The plurality of first protection components 30 are spaced apart along the extension direction of the conveyor belt 20, and the spacing between each component should be determined according to the length of the conveyor belt 20 and the characteristics of the conveyed material. Generally, the spacing should not be too large to ensure that any penetrating rupture at any location can be detected. For example, the spacing between components can be set to 5 meters to 10 meters, so that effective protection can be provided even over long distances of the conveyor belt 20.

[0032] Furthermore, the first alarm component includes an alarm indicator light and a speaker. In this embodiment, the alarm indicator light should be a high-intensity, high-brightness LED to ensure clear visibility under various lighting conditions. The speaker should have sufficient volume and clarity to be audible in noisy environments.

[0033] In an embodiment not shown in the figure, the conveying device further includes a second protection component, which is disposed on the conveyor frame 10. The second protection component includes a first swing frame, a second detection element, and a second alarm element. The first swing frame is located between the upper conveying surface 21 and the lower conveying surface 22. The first swing frame is rotatably disposed on the conveyor frame 10 and extends along the width direction of the conveyor belt 20. The first swing frame has a first abutment end and a first sensing end disposed opposite each other in the vertical direction. Both the first abutment end and the first sensing end are rotatable relative to the rotation axis of the first swing frame. The first abutment end is disposed close to the upper conveying surface 21. The second detection element is capable of detecting the position of the first sensing end. The second detection element is electrically connected to the second alarm element, and the second alarm element provides an alarm reminder based on the detection signal of the second detection element.

[0034] In this embodiment, in addition to the first protection component 30 described above, a second protection component is further introduced into the conveying device to enhance the safety and monitoring capabilities of the conveying system. The second protection component mainly consists of a first swing frame, a second detection element, and a second alarm element. The first swing frame is rotatably mounted on the conveyor frame 10 to ensure a rapid response when an external force is detected. The two ends of the first swing frame are designed as a first abutment end and a first sensing end, both capable of rotating relative to their axis of rotation. The first abutment end is positioned close to the upper conveying surface 21, primarily to detect any sharp objects or large debris that may penetrate the conveyor belt 20. When these objects touch the first abutment end, they force the first swing frame to rotate, thereby causing a corresponding positional change in the first sensing end. The main function of the second detection element is to monitor the positional change of the first sensing end. When the first sensing end rotates due to an external force acting on the first abutment end, the second detection element can immediately detect this change and send a signal to the second alarm element.

[0035] In another embodiment (not shown), the conveying device further includes a third protection component, which is disposed on the conveyor frame 10. The third protection component includes a second swing frame, a third detection element, and a third alarm element. The second swing frame is located between the upper conveying surface 21 and the lower conveying surface 22. The second swing frame is rotatably disposed on the conveyor frame 10 and extends along the width direction of the conveyor belt 20. The second swing frame has a second abutment end and a second sensing end disposed opposite each other in the vertical direction. Both the second abutment end and the second sensing end are rotatable relative to the rotation axis of the second swing frame. The second abutment end is disposed close to the lower conveying surface 22. The third detection element is capable of detecting the position of the second sensing end. The third detection element is electrically connected to the third alarm element, and the third alarm element provides an alarm reminder based on the detection signal of the third detection element.

[0036] In this embodiment, the third protection component includes a second swing frame, a third detection element, and a third alarm element. The second swing frame has a certain swing range and is rotatably mounted on the conveyor frame 10, located between the upper conveyor surface 21 and the lower conveyor surface 22, ensuring flexible swinging when large pieces of material are stuck or the conveyor belt 20 breaks. The second swing frame has a second abutment end and a second sensing end, wherein the second abutment end is located close to the lower conveyor surface 22. When the upper conveyor surface 21 breaks due to large pieces of material being stuck, the material falls from the break onto the surface of the lower conveyor surface 22 and continues to move along the conveying direction of the conveyor belt 20 until it touches the second abutment end located between the upper conveyor surface 21 and the lower conveyor surface 22, causing the second swing frame to swing as a whole. The third detection element senses the position of the second sensing end, causing the third alarm element to sound an alarm.

[0037] Specifically, the length of the second swing frame covers the width direction of the conveyor belt 20 to facilitate comprehensive monitoring of the condition of the conveyor belt 20.

[0038] Furthermore, the pivots of the first swing frame and the second swing frame are coaxially arranged.

[0039] Preferably, the conveying device further includes a fourth protection component, which is disposed on the conveyor frame 10. The fourth protection component includes a movable frame, a fourth detection element, and a fourth alarm element. The movable frame is located between the upper conveying surface 21 and the lower conveying surface 22. The movable frame moves in the same direction as the conveyor belt 20 and extends along the width direction of the conveyor belt 20. The fourth detection element can detect the position of the movable frame. The fourth detection element is electrically connected to the fourth alarm element, and the fourth alarm element provides an alarm reminder based on the detection signal of the fourth detection element.

[0040] In this embodiment, the movable frame is a lightweight yet robust structure to minimize its impact on the operation of the conveyor belt 20, while ensuring its effective movement when large debris gets stuck. The movable frame is positioned appropriately between the upper conveying surface 21 and the lower conveying surface 22 of the conveyor belt 20 to ensure that it can promptly detect any large debris that may cross the conveyor belt 20.

[0041] Furthermore, the conveying device includes a plurality of second protection components, which are spaced apart along the moving direction of the conveyor belt 20; and / or, the conveying device includes a plurality of third protection components, which are spaced apart along the moving direction of the conveyor belt 20.

[0042] In this embodiment, the second protection component also aims to monitor and prevent through-penetration ruptures. To achieve comprehensive monitoring, multiple second protection components should be spaced apart along the moving direction of the conveyor belt 20. The installation position and spacing of each component need to be optimized according to the length, width, and material type of the conveyor belt 20. For example, one second protection component can be installed every 10 to 15 meters to ensure that the entire area of ​​the conveyor belt 20 is effectively covered, avoiding blind spots. The third protection component can undertake additional tasks, such as monitoring conveyor belt 20 for deviation, overloading, or abnormal belt temperature, further enhancing the safety performance of the conveying device. Similar to the second protection component, the third protection component should also be spaced apart along the moving direction of the conveyor belt 20 to ensure timely detection of various potential safety hazards.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A conveying device, characterized in that, The conveying device includes: Conveyor frame (10); A conveyor belt (20) is fitted on the conveyor frame (10). The conveyor belt (20) can move around the conveyor frame (10). The conveyor belt (20) has an upper conveying surface (21) and a lower conveying surface (22) that are arranged opposite to each other. A first protection component (30) is disposed on the conveyor frame (10). The first protection component (30) includes a first detection element (31), a wire rope (32), and a first alarm element. The wire rope (32) is located between the upper conveyor surface (21) and the lower conveyor surface (22). There is a gap between the wire rope (32) and the upper conveyor surface (21). The wire rope (32) extends along the width direction of the conveyor belt (20). The first detection element (31) is used to detect the displacement of the wire rope (32) in the extension direction of the conveyor belt (20). The first detection element (31) is electrically connected to the first alarm element. The first alarm element provides an alarm reminder based on the detection signal of the first detection element (31).

2. The conveying device according to claim 1, characterized in that, The conveying device further includes: A drive unit is driven to drive the conveyor belt (20), and the drive unit drives the conveyor belt (20) to move. The first detection unit (31) is electrically connected to the drive unit, and the drive unit performs a stop or start operation according to the detection signal of the first detection unit (31).

3. The conveying device according to claim 2, characterized in that, The distance between the wire rope (32) and the upper conveying surface (21) in the height direction is 30 mm to 50 mm.

4. The conveying device according to claim 1, characterized in that, The conveying device includes a plurality of first protection components (30), which are spaced apart on the conveyor frame (10) along the extension direction of the conveyor belt (20).

5. The conveying device according to claim 1, characterized in that, The conveying device further includes: The second protection component is disposed on the conveyor frame (10). The second protection component includes a first swing frame, a second detection element, and a second alarm element. The first swing frame is located between the upper conveyor surface (21) and the lower conveyor surface (22). The first swing frame is rotatably disposed on the conveyor frame (10). The first swing frame extends along the width direction of the conveyor belt (20). The first swing frame has a first abutment end and a first sensing end disposed opposite each other in the vertical direction. Both the first abutment end and the first sensing end are rotatable relative to the rotation axis of the first swing frame. The first abutment end is disposed close to the upper conveyor surface (21). The second detection element is capable of detecting the position of the first sensing end. The second detection element is electrically connected to the second alarm element. The second alarm element provides an alarm reminder based on the detection signal of the second detection element.

6. The conveying device according to claim 5, characterized in that, The conveying device further includes: A third protection component is disposed on the conveyor frame (10). The third protection component includes a second swing frame, a third detection element, and a third alarm element. The second swing frame is located between the upper conveyor surface (21) and the lower conveyor surface (22). The second swing frame is rotatably disposed on the conveyor frame (10) and extends along the width direction of the conveyor belt (20). The second swing frame has a second abutment end and a second sensing end disposed opposite each other in the vertical direction. Both the second abutment end and the second sensing end are rotatable relative to the pivot of the second swing frame. The second abutment end is disposed close to the lower conveyor surface (22). The third detection element is capable of detecting the position of the second sensing end. The third detection element is electrically connected to the third alarm element. The third alarm element provides an alarm reminder based on the detection signal of the third detection element.

7. The conveying device according to claim 6, characterized in that, The first swing frame and the second swing frame are coaxially arranged.

8. The conveying device according to claim 1, characterized in that, The conveying device further includes: A fourth protection component is disposed on the conveyor frame (10). The fourth protection component includes a movable frame, a fourth detection element, and a fourth alarm element. The movable frame is located between the upper conveyor surface (21) and the lower conveyor surface (22). The movable frame moves in the same direction as the conveyor belt (20). The movable frame extends along the width direction of the conveyor belt (20). The fourth detection element can detect the position of the movable frame. The fourth detection element is electrically connected to the fourth alarm element. The fourth alarm element provides an alarm reminder based on the detection signal of the fourth detection element.

9. The conveying device according to claim 6, characterized in that, The conveying device includes a plurality of second protection components, which are spaced apart along the moving direction of the conveyor belt (20); and / or, the conveying device includes a plurality of third protection components, which are spaced apart along the moving direction of the conveyor belt (20).

10. The conveying device according to claim 1, characterized in that, The first alarm component includes an alarm indicator light and a speaker.

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