Sheet drying apparatus

Abstract

The utility model discloses a sheet drying device relates to roller dryer technical field, the frame is installed at the bottom of dryer, the feed hopper is installed on the support frame, the dryer is provided with the feed inlet and the discharge gate, the feed inlet is located the just below of feed hopper, the dust collector is connected with the dryer, is used for handling the dust in the dryer, the adjusting unit includes the guide pipe and the adjusting rod, one end of the guide pipe is connected with the discharge end of feed hopper, the other end of the guide pipe is located in the feed inlet, a plurality of guide holes are arranged on the lateral wall of the guide pipe, the adjusting rod is slidably installed in the guide hole and part adjusting rod is located outside the guide pipe, the adjusting rod is cylindrical. The feed speed of sheet is controlled by controlling the number of adjusting rod in the guide pipe, thereby the defect that the driving motor current can be sharply risen and possibly triggers overload protection shutdown, even burns the motor seriously when overcoming feeding too fast.

Description

Technical Field

[0001] This utility model belongs to the technical field of drum dryers, and specifically relates to a sheet drying device. Background Technology

[0002] In the production of SCR denitrification catalysts, the raw materials typically include supports, active components, additives, and pore structure modifiers. Before entering the mixing process, the moisture content of some sheet-like raw materials needs to be precisely controlled to ensure the final catalyst's chemical properties and physical structure. Therefore, a dedicated sheet drying device is required to dry these raw materials.

[0003] The basic working principle of sheet drying equipment is generally to transfer heat to the sheet through a heating system, causing the moisture or solvent contained within to evaporate, while a forced ventilation system promptly removes the hot and humid air, thus achieving efficient drying. However, existing sheet drying equipment has a significant drawback: its design focus is usually on temperature control, airflow distribution, and conveyor speed within the drying chamber, while neglecting the control of the feeding process. Specifically, existing equipment cannot control the speed at which raw materials enter the drying chamber. In actual operation, after the conveyor equipment pours a large amount of sheet material into the feed hopper of the equipment, the material will rapidly and unrestrainedly flow into the drying chamber under the influence of gravity.

[0004] The rapid influx of sheet material can lead to a series of serious consequences: First, the roller drive motor needs to overcome the rotational resistance torque caused by the heavier material. Excessive feeding speed can cause a sharp increase in motor current, potentially triggering overload protection and shutdown, and in severe cases, even burning out the motor. Second, the load on transmission components such as gears, rollers, and bearings far exceeds design values, accelerating wear, shortening equipment lifespan, and increasing maintenance costs and downtime risks. Finally, the rapid descent of material generates a large amount of dust, which may be beyond the timely handling capacity of the dust collection system, resulting in excessive dust emissions and failure to meet environmental standards. Therefore, a new type of sheet drying device is urgently needed. Utility Model Content

[0005] The purpose of this invention is to provide a sheet drying device. An adjusting unit is installed between the feed inlet and the feed hopper of the dryer. The feeding speed of the sheet is controlled by adjusting the number of adjusting rods in the guide tube, thereby overcoming the defect that excessively fast feeding can cause a sharp increase in the drive motor current, potentially triggering overload protection shutdown, and in severe cases, even burning out the motor. The specific technical solution is as follows: A sheet drying apparatus includes a dryer, a feed hopper, a frame, a support frame, and a dust removal device. The frame is installed at the bottom of the dryer, and the feed hopper is installed on the support frame. The dryer has a feed inlet and a discharge outlet, with the feed inlet located directly below the feed hopper. The dust removal device is connected to the dryer and is used to remove dust from inside the sheet. It also includes an adjustment unit, which includes a guide tube and an adjustment rod. One end of the guide tube is connected to the discharge end of the feed hopper, and the other end of the guide tube is located inside the feed inlet. Multiple guide holes are arrayed on the side wall of the guide tube. The adjustment rod is slidably installed in the guide holes, and part of the adjustment rod is located outside the guide tube. The adjustment rod is cylindrical.

[0006] Preferably, it also includes a dust baffle plate, which is installed on the feed inlet and has a clearance hole that fits against the outer wall of the guide tube.

[0007] Preferably, the guide tube has multiple first support grooves arrayed on the side away from the guide hole, each of the first support grooves corresponding to a guide hole, and the first support grooves are coaxial with the guide hole.

[0008] Preferably, an annular groove is formed on the side wall of the first support groove near the bottom end, and multiple dust discharge channels are arrayed on the inner side wall of the guide tube. Each dust discharge channel corresponds to one of the first support grooves. One end of each dust discharge channel is connected to the lowest point of the annular groove. The dust discharge channel is connected to the inside of the guide tube and is inclined downward.

[0009] Preferably, a support block is installed on the dust baffle plate, and multiple second support grooves are arrayed on the support block. The second support grooves are semi-cylindrical, and each second support groove corresponds to a guide hole. The second support grooves are coaxial with the guide holes.

[0010] Preferably, a limiting plate is installed on the side of the support block away from the guide tube, and the limiting plate is used to close one end of the second support groove.

[0011] Preferably, it also includes a cleaning unit, which includes a housing, a brush and a collection box. The housing is installed on the side wall of the guide tube, and the housing has cleaning holes that correspond one-to-one with the guide holes. The cleaning holes penetrate the housing, and the brush is installed on the inner side wall of the cleaning holes.

[0012] Preferably, the housing also includes a collection box, which is installed at the bottom of the housing. The collection box has an opening at the top, and a discharge hole is provided on the inner wall of the cleaning hole. The discharge hole communicates with the collection box.

[0013] Preferably, the collection box is made of a transparent material.

[0014] Preferably, it also includes an automatic control unit, which includes a linear drive element and a controller. Multiple linear drive elements are mounted on the support frame. The output end of the linear drive element is connected to the end of the adjusting rod located outside the guide tube. The controller is mounted on the support frame, and the linear drive element is electrically connected to the controller.

[0015] Compared with existing technologies, this utility model has the following beneficial effects: 1. This utility model has an adjustment unit installed between the feed inlet and the feed hopper of the dryer. According to the density of the sheet, the feeding speed of the sheet is controlled by controlling the number of adjustment rods in the guide tube. This ensures that the weight increase caused by the falling speed of the sheet will not trigger the overload protection of the drive motor, thus ensuring the stable operation of the drying device and extending the service life of the drying device.

[0016] 2. This utility model uses a cleaning unit to clean the dust adhering to the adjusting rod, preventing dust from being discharged along with the adjusting rod when it is pulled out of the guide tube, thus avoiding ring-shaped pollution. Simultaneously, the brush can also block the gap between the adjusting rod and the guide hole, preventing some dust from overflowing from the gap during the feeding process of the dryer and causing environmental pollution. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram illustrating the production and use of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle.

[0021] Figure 4 This is a schematic diagram of the guide tube and the internal structure of the housing of this utility model.

[0022] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0023] Explanation of key figure labels: 1. Dryer; 101. Feed inlet; 102. Discharge outlet; 2. Support frame; 3. Frame; 4. Feed hopper; 5. Dust removal device; 6. Guide tube; 61. First support groove; 62. Annular groove; 63. Dust discharge channel; 7. Adjusting rod; 8. Dust baffle plate; 9. Support block; 91. Second support groove; 10. Limiting plate; 11. Housing; 111. Cleaning hole; 112. Discharge hole; 12. Brush; 13. Collection box; 14. Staircase. Detailed Implementation

[0024] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] One of the existing drying devices used for sheet materials is the rotary drum dryer. The working principle of a rotary drum dryer is as follows: The inner wall of the drum is heated electrically. When the drive motor rotates the drum clockwise, the sheet material entering from the feed inlet gradually enters the drum along the internal guide plates. Heat is transferred between the sheet material and the inner wall of the drum, thus drying the sheet. Simultaneously, a dust removal device removes dust and moisture, preventing the sheet from reabsorbing the moisture generated during drying. After drying, the drive motor reverses the drum, and the sheet material gradually moves towards the discharge outlet under the action of the guide plates, eventually being discharged from the outlet.

[0026] Next, refer to Figures 1 to 5 The working principle of this embodiment will be described in detail so that those skilled in the art can better understand this utility model: A sheet drying device includes a dryer, a feed hopper, a frame, a support frame, and a dust removal device. The frame is bolted to the bottom of the dryer to secure it and raise its height to accommodate other components. The feed hopper is welded to the support frame. A discharge trolley pours sheet material into the feed hopper, which gradually guides the sheet into the dryer. The dryer has a feed inlet and a discharge outlet, with the feed inlet located directly below the feed hopper. The dust removal device is connected to the feed hopper and discharge outlet of the dryer via pipes. It uses negative pressure to suck away dust generated by the collision of the sheet during feeding, preventing dust pollution. Simultaneously, it removes moisture generated after the sheet is dried, preventing the sheet from reabsorbing the moisture.

[0027] The adjustment unit includes a guide tube and an adjustment rod. One end of the guide tube is bolted to the discharge end of the feed hopper, while the other end is located inside the feed inlet, ensuring that all material can smoothly enter the dryer. Multiple guide holes are arrayed on the side wall of the guide tube. The adjustment rod is slidably installed within the guide holes, with some sections extending outside the guide tube. The operator can move to the height of the guide tube via a ladder mounted on the support frame and manually push or pull the adjustment rods to control the number of rods passing through the guide tube, thereby adjusting the area of ​​the sheet and the actual feeding area, and thus regulating the sheet feeding speed. If the adjustment rod is needed to adjust the feeding speed, one end of the rod needs to be pushed until it contacts the inner wall of the guide tube; if it is not needed, the rod needs to be removed from the guide hole. The adjustment rod is cylindrical to prevent sheet residue from remaining on it and affecting the sheet's entry into the dryer. This application allows for adjustment of the sheet feeding speed based on the sheet density, ensuring that the weight increase caused by the sheet's falling speed does not trigger the drive motor's overload protection. It also reduces wear on transmission components caused by sudden load increases, guaranteeing stable operation of the drying equipment and extending its service life. Finally, controlling the sheet falling speed also controls the dust generation rate, ensuring it does not exceed the design limit of the dust removal device's efficiency, thus guaranteeing production complies with environmental standards.

[0028] A dust baffle is installed on the feed inlet to seal the gap between the guide tube and the feed inlet, preventing dust from overflowing. The dust baffle has clearance holes to allow the guide tube to pass through. The shape and size of the clearance holes are the same as the cross-sectional shape and size of the guide tube, and the clearance holes fit snugly against the outer wall of the guide tube. A sealing ring can be used between the dust baffle and the guide tube to increase the seal; the sealing ring is installed inside the clearance holes.

[0029] Multiple first support grooves are arrayed on the side of the guide tube away from the guide hole. Each first support groove corresponds to a guide hole and is coaxial with the guide hole. The first support grooves are used to support one end of the adjusting rod. Compared to supporting only the guide hole, supporting both ends of the adjusting rod increases its stability and prevents bending deformation of the adjusting rod and guide hole under the impact of the sheet. The edges of the first support grooves can be chamfered or rounded to facilitate guidance, making it easier for the adjusting rod to enter the first support groove and improving work efficiency.

[0030] An annular groove is formed on the side wall near the bottom of the first support groove. Multiple dust removal channels are arrayed on the inner side wall of the guide tube, each corresponding to a different first support groove. One end of each dust removal channel connects to the lowest point of the annular groove and is connected to the inside of the guide tube, sloping downwards. During operation, the dryer generates dust, some of which may accumulate in the first support groove. To prevent dust from affecting the adjustment rod's entry into the first support groove, an annular groove and dust removal channels are formed inside the guide tube. When one end of the adjustment rod is pushed into the first support groove, the end of the rod pushes the accumulated dust into the annular groove. The dust in the annular groove then enters the guide tube through the dust removal channel under the influence of gravity and vibration, and is finally sucked away by the dust removal device.

[0031] Support blocks are bolted to the dust baffle plate. Multiple semi-cylindrical second support grooves are arrayed on the support blocks, each corresponding to a guide hole and coaxial with it. When the operator moves the adjusting rod away from the first support groove, so that it is not involved in adjusting the sheet feed speed, one end of the adjusting rod can be placed on the second support groove without fully withdrawing it. For the next use, the adjusting rod can be directly pushed into the first support groove, increasing work efficiency. Simultaneously, keeping the adjusting rod within the guide hole prevents dust from overflowing. The distance between the support block and the guide tube is equal to the width between the inner walls of the guide tube. When one end of the adjusting rod is placed on the second support groove, the other end is within the guide hole.

[0032] A limiting plate is installed on the side of the support block away from the guide tube. The limiting plate is used to close one end of the second support groove.

[0033] It also includes a cleaning unit, which includes a housing, a brush and a collection box. The housing is installed on the side wall of the guide tube and has cleaning holes that correspond one-to-one with the guide holes. The cleaning holes penetrate the housing and the brush is installed on the inner side wall of the cleaning holes.

[0034] A collection box is installed at the bottom of the housing, and an opening is provided at the top of the collection box. A discharge hole is provided on the inner wall of the cleaning hole, and the discharge hole is connected to the collection box.

[0035] The collection box is made of transparent material.

[0036] The automatic control unit includes linear drive elements and a controller. Multiple linear drive elements are mounted on the support frame. The output end of the linear drive element is connected to the end of the adjusting rod located outside the guide tube. The controller is mounted on the support frame, and the linear drive elements are electrically connected to the controller.

[0037] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A sheet drying apparatus, comprising a dryer, a feed hopper, a frame, a support frame, and a dust removal device, wherein the frame is installed at the bottom of the dryer, the feed hopper is installed on the support frame, the dryer is provided with a feed inlet and a discharge outlet, the feed inlet being located directly below the feed hopper, and the dust removal device is connected to the dryer for treating dust inside the dried sheet. characterized in that It also includes an adjustment unit, which includes a guide tube and an adjustment rod. One end of the guide tube is connected to the discharge end of the feed hopper, and the other end of the guide tube is located inside the feed inlet. Multiple guide holes are arrayed on the side wall of the guide tube. The adjustment rod is slidably installed in the guide holes, and part of the adjustment rod is located outside the guide tube. The adjustment rod is cylindrical.

2. A sheet drying apparatus according to claim 1, wherein It also includes a dust baffle plate, which is installed on the feed inlet and has clearance holes that fit against the outer wall of the guide tube.

3. The sheet drying apparatus according to claim 1, wherein The guide tube has multiple first support grooves arranged in an array on the side away from the guide hole. Each first support groove corresponds to a guide hole and is coaxial with the guide hole.

4. A sheet drying apparatus according to claim 3, wherein An annular groove is formed on the side wall of the first support groove near the bottom end. Multiple dust discharge channels are arrayed on the inner side wall of the guide tube. Each dust discharge channel corresponds to one of the first support grooves. One end of each dust discharge channel is connected to the lowest point of the annular groove. The dust discharge channel is connected to the inside of the guide tube and is inclined downward.

5. The sheet drying apparatus according to claim 2, wherein The dust baffle is equipped with a support block, and the support block has multiple second support grooves arranged in an array. The second support grooves are semi-cylindrical, and each second support groove corresponds to a guide hole. The second support grooves and the guide holes are coaxial.

6. The sheet drying apparatus according to claim 5, characterized in that, A limiting plate is installed on the side of the support block away from the guide tube, and the limiting plate is used to close one end of the second support groove.

7. The sheet drying apparatus according to claim 1, wherein It also includes a cleaning unit, which includes a housing, a brush and a collection box. The housing is installed on the side wall of the guide tube. The housing has cleaning holes that correspond one-to-one with the guide holes. The cleaning holes penetrate the housing. The brush is installed on the inner side wall of the cleaning holes.

8. A sheet drying apparatus according to claim 7, wherein It also includes a collection box, which is installed at the bottom of the housing. The collection box has an opening at the top and a discharge hole is provided on the inner wall of the cleaning hole. The discharge hole is connected to the collection box.

9. A sheet drying apparatus according to claim 8, wherein The collection box is made of transparent material.

10. A sheet drying apparatus according to claim 1, characterized in that, It also includes an automatic control unit, which includes a linear drive element and a controller. Multiple linear drive elements are mounted on the support frame. The output end of the linear drive element is connected to the end of the adjusting rod located outside the guide tube. The controller is mounted on the support frame, and the linear drive element is electrically connected to the controller.

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