A purging mechanism and transfer device

Abstract

The present application relates to the technical field of tobacco leaf transportation equipment, and specifically discloses a blowing mechanism and a transfer device, wherein the blowing mechanism comprises a gas blowing assembly and a gas suction assembly. The gas blowing assembly is located on one side of the left-right direction of the belt transmission mechanism, the nozzle of the gas blowing assembly is installed on the rack, the gas source forms a positive pressure airflow through the nozzle, the nozzle faces the upper end surface of the lower layer of the belt, in the front-rear direction, the direction of the nozzle is opposite to the moving direction of the lower layer of the belt, in the left-right direction, the nozzle faces the other side of the left-right direction of the belt transmission mechanism; the gas suction assembly is located on the other side of the left-right direction of the belt transmission mechanism, the collecting cover of the gas suction assembly is conical, the large-diameter end of the collecting cover faces the lower layer of the belt, the small-diameter end of the collecting cover is communicated with the input end of the driving part, and the driving part generates a negative pressure airflow. In this way, the gap space of the belt transmission mechanism is cleaned, on the one hand, the secondary diffusion of impurities is inhibited, and on the other hand, the reliability of the operation of the belt transmission mechanism is improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco leaf transport equipment technology, and in particular to a purging mechanism and a transfer device. Background Technology

[0002] In the tobacco industry's cigarette processing, belt conveyors are commonly used as auxiliary equipment for material transport. The safe, reliable, and stable continuous operation of these conveyors directly impacts the stability and reliability of the cigarette-making line. Belt misalignment is one of the most common faults of belt conveyors. The main cause is that tobacco ash falls into the belt, causing dirt buildup on the rollers, resulting in uneven friction on both sides of the belt and causing misalignment. If the belt misalignment is not corrected promptly, spillage and leakage will occur. Severe belt wear can even lead to tearing and deformation, producing adhesive powder and filaments that fall into the material, significantly impacting production and product quality.

[0003] Therefore, there is an urgent need for a purging mechanism and a transfer device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a purging mechanism and a transfer device to solve the problem of dirt accumulation on rollers.

[0005] On one hand, the present invention provides a purging mechanism applicable to a belt conveyor mechanism, wherein the belt conveyor mechanism includes a frame, drive rollers, and a belt, the drive rollers being spaced apart in the front-to-back direction on the frame, the belt being connected end-to-end to form a closed loop and sleeved on two of the drive rollers, and the belt being formed on an upper belt and a lower belt spaced apart in the vertical direction. The purging mechanism includes: An air blowing assembly is located on one side of the belt drive mechanism in the left-right direction. The air blowing assembly includes an air source and a nozzle. The nozzle is mounted on the frame. The air source forms a positive pressure airflow through the nozzle. The nozzle faces the upper end face of the lower belt. In the front-back direction, the nozzle faces the opposite direction of movement of the lower belt. In the left-right direction, the nozzle faces the other side of the belt drive mechanism in the left-right direction. The suction assembly is located on the other side of the belt drive mechanism in the left-right direction. The suction assembly includes a drive member and a collection hood. The collection hood is conical, with its large-diameter end facing the lower belt and its small-diameter end connected to the input end of the drive member. The drive member generates a negative pressure airflow.

[0006] As a preferred embodiment of the above-mentioned purging mechanism, the above-mentioned suction assembly further includes a collection box, and the above-mentioned drive unit connects the output end of the above-mentioned collection hood and the input end of the above-mentioned collection box.

[0007] As a preferred embodiment of the aforementioned blowing mechanism, the aforementioned suction assembly further includes a blocking member. In the aforementioned left-right direction, the blocking member is located on the side of the aforementioned belt conveyor mechanism opposite to the aforementioned air blowing assembly. The blocking member is fixed relative to the aforementioned collection hood and is located above the aforementioned collection hood. The blocking member includes a dustproof net and a guide groove. Along the flow direction of the aforementioned positive pressure airflow, the dustproof net is located downstream of the aforementioned suction assembly. The aforementioned positive pressure airflow can pass through the aforementioned dustproof net, and the dust carried in the aforementioned positive pressure airflow is intercepted by the aforementioned dustproof net. The aforementioned guide groove is located below the aforementioned dustproof net. In the aforementioned front-back direction, the lower end of the aforementioned guide groove is connected to the larger diameter end of the aforementioned collection hood.

[0008] As a preferred embodiment of the above-mentioned blowing mechanism, the above-mentioned suction assembly further includes a first cleaning member, which is slidably connected to the above-mentioned blocking member. The first cleaning member is movable along the length direction of the above-mentioned guide groove, and the brush of the first cleaning member contacts the inner sidewall of the above-mentioned guide groove.

[0009] As a preferred embodiment of the above-mentioned blowing mechanism, the above-mentioned suction assembly further includes a second cleaning member, which is installed between the upper belt and the lower belt and is located on the side of the lower belt near the collection hood. The second cleaning member is in contact with the upper end surface of the lower belt. In the projection of the second cleaning member in the vertical direction, the second cleaning member is inclined. The end of the second cleaning member facing the collection hood is located downstream of the end of the second cleaning member facing the air blowing assembly, so that impurities can enter the collection tank through the second cleaning member.

[0010] As a preferred embodiment of the above-mentioned purging mechanism, it further includes an adjusting bracket, which comprises: The base is fixed to the frame. The first support rod is installed on the base, and the axis of the first support rod is parallel to the left and right directions. A clamp is mounted on the first support rod, and the clamp is rotatable about the axis of the first support rod. The nozzle is mounted on the clamp.

[0011] As a preferred embodiment of the above-mentioned purging mechanism, the adjusting bracket further includes a telescopic component, the fixed end of which is fixed to the base, and the actuating end of which is connected to the first support rod. The fixed end and the actuating end of the telescopic component can move along the above-mentioned vertical direction.

[0012] As a preferred embodiment of the above-mentioned purging mechanism, the adjustment bracket further includes a support back plate, which is slidably connected to the base in the aforementioned front-rear direction. The nozzle forms a cleaning area on the lower belt, and the support back plate is located below the lower belt to support the lower belt located within the cleaning area.

[0013] As a preferred embodiment of the above-mentioned purging mechanism, the air blowing assembly further includes a regulating valve, which is installed on the nozzle and is used to regulate the airflow rate output by the nozzle.

[0014] A transfer device is also provided, including a belt conveyor mechanism and the aforementioned blowing mechanism, wherein the aforementioned air blowing component and the aforementioned air suction component are respectively disposed on opposite sides of the aforementioned left-right direction of the belt conveyor mechanism.

[0015] The purging mechanism provided by this invention has at least the following beneficial effects: This embodiment provides a purging mechanism, which includes an air blowing assembly and an air suction assembly. The air blowing assembly is located on one side of the belt drive mechanism in the left-right direction. The air blowing assembly includes an air source and a nozzle. The nozzle is mounted on the frame, and the air source generates a positive pressure airflow through the nozzle. The nozzle faces the upper end face of the lower belt. In the front-back direction, the nozzle's orientation is opposite to the movement direction of the lower belt. In the left-right direction, the nozzle faces the other side of the belt drive mechanism in the left-right direction. The air suction assembly is located on the other side of the belt drive mechanism in the left-right direction. The air suction assembly includes a driving component and a collection hood. The collection hood is conical, with its large-diameter end facing the lower belt and its small-diameter end connected to the input end of the driving component. The driving component generates a negative pressure airflow.

[0016] The air blowing assembly is located on the left side of the belt conveyor assembly, and the suction assembly is located on the right side. The air blowing assembly includes nozzles and an air source. The air source outputs positive pressure airflow to the nozzles, which are located inside or outside the gap space. The axis of the nozzles determines the direction of the positive pressure airflow. In the left-right direction, the positive pressure airflow blows from the left side of the belt conveyor assembly to the right side. In the up-down direction, the positive pressure airflow flows to the upper surface of the lower belt. In the front-back direction, the airflow direction is opposite to the movement direction of the lower belt. The positive pressure airflow can act on impurities falling onto the upper surface of the lower belt. The impurities are entrained in the positive pressure airflow and blown towards the suction assembly. The suction assembly includes a drive component and a collection hood. The drive component generates negative pressure airflow. The collection hood is conical (narrowing structure), with its large-diameter end serving as the inlet facing the lower belt. The small-diameter end of the collection hood is connected to the drive component. Under the action of the drive component, the collection hood absorbs impurities in a suspended state.

[0017] With this configuration, the nozzle faces the upper surface of the lower belt. When the positive pressure airflow acts on impurities, it drives the impurities towards the suction assembly in the left-right direction. Simultaneously, the positive pressure airflow suppresses the height at which the impurities are lifted, preventing further diffusion after they are lifted by the airflow. In the front-back direction, the nozzle's orientation is opposite to the movement direction of the lower belt, ensuring that the force exerted by the positive pressure airflow on the impurities is opposite to the force exerted by the lower belt, making it easier for the impurities to detach from the lower belt. Once the impurities reach the vicinity of the suction assembly, they are drawn into the collection hood by the negative pressure airflow. This effectively cleans the gaps in the belt conveyor mechanism, suppressing secondary diffusion of impurities and improving the reliability of the belt conveyor operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first structure of the purging mechanism in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the purging mechanism in an embodiment of the present invention.

[0019] In the picture: 111. First roller; 112. Second roller; 113. Upper belt; 114. Lower belt; 11. Nozzle; 12. Control valve; 13. First fitting; 14. Second hanger; 21. Drive component; 22. Collection cover; 23. Collection box; 24. Third pipe fitting; 25. Fourth pipe fitting. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] like Figure 1 and Figure 2 As shown, the belt conveyor mechanism includes a frame, drive rollers and belts. The drive rollers are spaced apart on the frame in the front-to-back direction. The belts are connected end to end to form a closed loop and are sleeved on the two drive rollers. The belts are formed on an upper belt 113 and a lower belt 114 spaced apart in the vertical direction.

[0025] For example, the frame serves as the assembly base for the belt conveyor mechanism. Two drive rollers are provided, spaced apart along the front-to-back direction and rotatably mounted on the frame. One is a first roller body 111, and the other is a second roller body 112. The belt is connected end-to-end and fitted onto the driving and driven pulleys. Projected in the left-to-right direction, the belt is ring-shaped and includes an upper belt 113 and a lower belt 114. During operation of the belt drive mechanism, the upper belt 113 and the lower belt 114 dynamically switch between each other. Because the belt is supported by the two drive rollers, a gap space is formed between the upper belt 113 and the lower belt 114. When the belt conveyor transports tobacco or other products, product debris or other impurities often enter this gap space. These impurities fall onto the upper surface of the lower belt 114. As the belt moves, these impurities can easily get caught in the drive rollers, causing relative rubbing between the belt and the drive rollers.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a purging mechanism, which includes an air blowing assembly and an air suction assembly. The air blowing assembly is located on one side of the belt drive mechanism in the left-right direction. The air blowing assembly includes an air source and a nozzle 11. The nozzle 11 is mounted on the frame. The air source generates a positive pressure airflow through the nozzle 11. The nozzle 11 faces the upper end face of the lower belt 114. In the front-back direction, the orientation of the nozzle 11 is opposite to the movement direction of the lower belt 114. In the left-right direction, the nozzle 11 faces the other side of the belt drive mechanism in the left-right direction. The air suction assembly is located on the other side of the belt drive mechanism in the left-right direction. The air suction assembly includes a drive member 21 and a collection hood 22. The collection hood 22 is conical. The large-diameter end of the collection hood 22 faces the lower belt 114, and the small-diameter end of the collection hood 22 is connected to the input end of the drive member 21. The drive member 21 generates a negative pressure airflow.

[0027] For example, the air blowing assembly is located on the left side of the belt conveyor assembly, and the suction assembly is located on the right side of the belt conveyor assembly. The air blowing assembly includes a nozzle 11 and an air source. The air source outputs positive pressure airflow to the nozzle 11. The nozzle 11 is located inside or outside the gap space. The axial direction of the nozzle 11 is the direction of the positive pressure airflow. In the left-right direction, the positive pressure airflow blows from the left side of the belt conveyor assembly to the right side. In the up-down direction, the positive pressure airflow flows to the upper end face of the lower belt 114. In the front-back direction, the airflow direction of the positive pressure airflow is opposite to the movement direction of the lower belt 114. The positive pressure airflow can act on impurities falling onto the upper end face of the lower belt 114. The impurities are entrained in the positive pressure airflow and blown towards the suction assembly. The suction assembly includes a drive unit 21 and a collection hood 22. The drive unit 21 is used to generate negative pressure airflow. The collection hood 22 is conical, i.e., a constricted structure. Its large diameter end serves as the inlet, facing the lower belt 114. The small diameter end of the collection hood 22 is connected to the drive unit 21. Under the action of the drive unit 21, the collection hood 22 absorbs impurities in a suspended state.

[0028] With this configuration, the nozzle 11 faces the upper surface of the lower belt 114. When the positive pressure airflow acts on the impurities, it drives them towards the suction assembly in the left-right direction. Simultaneously, the positive pressure airflow suppresses the height at which the impurities are lifted, preventing further diffusion after they are lifted by the airflow. In the front-back direction, the nozzle 11 faces the opposite direction to the movement of the lower belt 114, ensuring that the force exerted by the positive pressure airflow on the impurities is opposite to the force exerted by the lower belt 114, making it easier for the impurities to detach from the lower belt 114. Once the impurities reach the vicinity of the suction assembly, they are drawn into the collection hood 22 by the negative pressure airflow. This cleans the gap space of the belt conveyor mechanism, suppressing secondary diffusion of impurities and improving the reliability of the belt conveyor operation.

[0029] Optionally, the suction assembly also includes a collection box 23, with the drive unit 21 connecting the output end of the collection hood 22 and the input end of the collection box 23.

[0030] With this configuration, the collection box 23 can centrally collect the impurities sucked in by the collection hood 22, thus preventing the impurities from causing secondary pollution to the working environment.

[0031] Optionally, the suction assembly also includes a blocking member in the left-right direction. The blocking member is located on the side of the belt conveyor mechanism opposite to the air blowing assembly. The blocking member is fixed relative to the collection hood 22 and is located above the collection hood 22. The blocking member includes a dustproof net and a guide groove. Along the flow direction of the positive pressure airflow, the dustproof net is located downstream of the suction assembly. The positive pressure airflow can pass through the dustproof net, and the dust carried in the positive pressure airflow is intercepted by the dustproof net. The guide groove is located below the dustproof net and in the front-back direction. The lower end of the guide groove is connected to the large diameter end of the collection hood 22.

[0032] For example, in the left-right direction, the blocking member is located on the right side of the belt drive device, that is, on the same side as the collection hood 22. The blocking member includes a dustproof net and a guide groove. The length direction of the guide groove is the front-back direction, the width direction is the left-right direction, and the depth direction is the up-down direction. The guide groove is located on one or both sides of the collection hood 22 in the left-right direction. The guide groove is inclined, and the side of the guide groove closer to the collection hood 22 is in a lower position. In this way, impurities in the guide groove move into the collection hood 22 under the action of gravity. The dustproof net is installed on the outside of the collection hood 22. The dustproof net has small gaps to allow airflow to pass through, but can intercept impurities. The dustproof net is set to prevent impurities from escaping into its area under the entrainment of positive pressure airflow. Some of the impurities intercepted by the dustproof net fall directly into the collection hood 22, and the other part falls into the guide groove and then falls into the collection hood 22 through the guide groove.

[0033] Optionally, the suction assembly also includes a first cleaning member, which is slidably connected to the blocking member. The first cleaning member is movable along the length of the guide groove, and the brush of the first cleaning member contacts the inner sidewall of the guide groove.

[0034] Because the positive pressure airflow has relatively small wind force, it can blow impurities toward the side where the air intake component is located during operation, but it cannot make the impurities be drawn into the collection hood 22 by the negative pressure airflow.

[0035] Optionally, the suction assembly also includes a second cleaning component, which is installed between the upper belt 113 and the lower belt 114 and located on the side of the lower belt 114 near the collection hood 22. The second cleaning component contacts the upper end face of the lower belt 114. In the vertical direction, the second cleaning component is inclined, and the end of the second cleaning component facing the collection hood 22 is located downstream of the end of the second cleaning component facing the air blowing assembly, so that impurities can enter the collection tank through the second cleaning component.

[0036] For example, the air blowing assembly also includes a second cleaning member. In the left-right direction, the second cleaning member is located on the side near the collection hood 22. The second cleaning member is inclined and along the moving direction of the lower belt 114, the left end of the second cleaning member is located upstream of the right end of the second cleaning member. In use, the air blowing assembly blows impurities toward the side where the suction assembly is located. Some impurities are sucked into the collection hood 22 by the negative pressure airflow, and some impurities remain on the side of the lower belt 114 near the suction assembly. As the lower belt 114 runs, these impurities come into contact with the second cleaning member, and the impurities enter the collection groove along the second cleaning member and enter the collection hood 22 through the collection groove.

[0037] Optionally, the purging mechanism further includes an adjusting bracket, which comprises a base, a first support rod, and a clamp. The base is fixed to the frame; the first support rod is mounted on the base, and its axis is parallel to the left-right direction; the clamp is mounted on the first support rod and is rotatable around its axis; the nozzle 11 is mounted on the clamp.

[0038] For example, the base is detachably mounted to the frame, and is fixed to the frame during use. The clamp uses the first support rod as a hinge axis, and the nozzle 11 is mounted on the clamp. The pitch angle of the nozzle 11 can be adjusted by rotating the clamp, thereby adjusting the position of the positive pressure airflow in the front-back direction.

[0039] Optionally, the adjusting bracket also includes a telescopic component, the fixed end of which is fixed to the base, and the actuating end of which is connected to the first support rod. The fixed end and the actuating end of the telescopic component can move in the vertical direction.

[0040] This configuration allows the first support rod to carry the nozzle 11 and move it in the front-to-back direction.

[0041] The positive pressure airflow exerts a force on the lower belt 114, causing it to tend to bend downwards. Since the belt itself is a flexible component, it will also sag under the influence of gravity when it is suspended. On the one hand, this causes the belt to gradually loosen, resulting in slippage between the belt and the drive roller. On the other hand, due to the bending of the belt, the pores on its surface tend to be squeezed and closed, which traps impurities and makes it difficult for impurities to be transferred with the positive pressure airflow.

[0042] Optionally, the adjusting bracket also includes a support back plate, which is slidably connected to the base in the front-rear direction. The nozzle 11 forms a cleaning area on the lower belt 114, and the support back plate is located below the lower belt 114 to support the lower belt 114 located in the cleaning area.

[0043] For example, the support back plate is located below the lower belt 114 and can slide relative to the base in the front-to-back direction. In use, the air blowing assembly outputs positive pressure airflow, and the area where the positive pressure airflow acts on the lower belt 114 is called the cleaning area. The support back plate is used to support the lower belt 114 in the cleaning area, reducing the downward bending of the lower belt 114. Furthermore, since the nozzle 11 can adjust its elevation angle through the clamp and the first support rod, changing the position of the cleaning area in the front-to-back direction, the support back plate is slidably connected to the base in the front-to-back direction to accommodate the adjustment of the nozzle 11.

[0044] Optionally, the air blowing assembly also includes a regulating valve 12, which is mounted on the nozzle 11 and is used to regulate the airflow rate output by the nozzle 11.

[0045] With this configuration, the flow rate of the positive pressure airflow ejected from the nozzle 11 can be changed by altering the opening of the regulating valve 12.

[0046] Optionally, the gas source is connected to the regulating valve 12 via the first fitting 13.

[0047] Optionally, the regulating valve 12 is connected to the nozzle 11 via a second fitting.

[0048] Optionally, the drive unit 21 is connected to the collection hood 22 via a third pipe 24.

[0049] Optionally, the drive unit 21 is connected to the storage box via the fourth pipe 25.

[0050] A transfer device is also provided, including a belt conveyor mechanism and the aforementioned blowing mechanism, wherein the air blowing component and the air suction component are respectively disposed on opposite sides of the belt conveyor mechanism in the left and right directions.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A purging mechanism, applicable to a belt conveyor mechanism, the belt conveyor mechanism comprising a frame, drive rollers, and a belt, the drive rollers being spaced apart in the front-to-back direction on the frame, the belt being connected end-to-end to form a closed loop and sleeved on two of the drive rollers, the belt being formed by an upper belt (113) and a lower belt (114) spaced apart in the vertical direction, characterized in that, The purging mechanism includes: An air blowing assembly is located on one side of the belt drive mechanism in the left-right direction. The air blowing assembly includes an air source and a nozzle (11). The nozzle (11) is mounted on the frame. The air source forms a positive pressure airflow through the nozzle (11). The nozzle (11) faces the upper end face of the lower belt (114). In the front-back direction, the orientation of the nozzle (11) is opposite to the movement direction of the lower belt (114). In the left-right direction, the nozzle (11) faces the other side of the belt drive mechanism in the left-right direction. The suction assembly is located on the other side of the left-right direction of the belt drive mechanism. The suction assembly includes a drive member (21) and a collection hood (22). The collection hood (22) is conical. The large diameter end of the collection hood (22) faces the lower belt (114). The small diameter end of the collection hood (22) is connected to the input end of the drive member (21). The drive member (21) generates negative pressure airflow.

2. The purging mechanism according to claim 1, characterized in that, The air intake assembly also includes a collection box (23), and the drive unit (21) connects the output end of the collection cover (22) and the input end of the collection box (23).

3. The purging mechanism according to claim 1, characterized in that, The suction assembly also includes a blocking member. In the left-right direction, the blocking member is located on the side of the belt conveyor mechanism opposite to the air blowing assembly. The blocking member is fixed relative to the collection cover (22) and located above the collection cover (22). The blocking member includes a dustproof net and a guide groove. Along the flow direction of the positive pressure airflow, the dustproof net is located downstream of the suction assembly. The positive pressure airflow can pass through the dustproof net, and the dust carried in the positive pressure airflow is intercepted by the dustproof net. The guide groove is located below the dustproof net. In the front-back direction, the lower end of the guide groove is connected to the large diameter end of the collection cover (22).

4. The purging mechanism according to claim 3, characterized in that, The suction assembly further includes a first cleaning member, which is slidably connected to the blocking member. The first cleaning member is movable along the length of the guide groove, and the brush of the first cleaning member contacts the inner sidewall of the guide groove.

5. The purging mechanism according to claim 3, characterized in that, The suction assembly further includes a second cleaning member, which is installed between the upper belt (113) and the lower belt (114) and located on the side of the lower belt (114) near the collection hood (22). The second cleaning member contacts the upper end face of the lower belt (114). In the vertical direction, the second cleaning member is inclined. The end of the second cleaning member facing the collection hood (22) is located downstream of the end of the second cleaning member facing the air blowing assembly. Impurities can enter the collection trough through the second cleaning member.

6. The purging mechanism according to claim 1, characterized in that, It also includes an adjustment bracket, the adjustment bracket comprising: Base, the base being fixed to the frame; A first support rod is mounted on the base, and the axis of the first support rod is parallel to the left-right direction. A clamp is mounted on the first support rod, the clamp is rotatable about the axis of the first support rod, and the nozzle (11) is mounted on the clamp.

7. The purging mechanism according to claim 6, characterized in that, The adjusting bracket also includes a telescopic component, the fixed end of which is fixed to the base, and the actuating end of which is connected to the first support rod. The fixed end and the actuating end of the telescopic component can move along the vertical direction.

8. The purging mechanism according to claim 6, characterized in that, The adjusting bracket also includes a support back plate, which is slidably connected to the base along the front-rear direction. The nozzle (11) forms a cleaning area on the lower belt (114). The support back plate is located below the lower belt (114) and is used to support the lower belt (114) located in the cleaning area.

9. The purging mechanism according to claim 1, characterized in that, The air blowing assembly also includes a regulating valve (12), which is installed on the nozzle (11) and is used to regulate the airflow rate output by the nozzle (11).

10. A transfer device, characterized in that, It includes a belt conveyor mechanism and a blowing mechanism as described in any one of claims 1-9, wherein the air blowing assembly and the air suction assembly are respectively disposed on opposite sides of the belt conveyor mechanism in the left-right direction.

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