A drying apparatus

Abstract

The utility model provides a kind of drying equipment, including rack, rack is provided with drying cylinder, one end of drying cylinder is provided with driving element, other end is provided with the hot blast oven being communicated therewith, the air inlet of hot blast oven is communicated with the air outlet of electric heater, the inside of drying cylinder is provided with the output shaft transmission connection of driving element of rotating rod, the outside of rotating rod is provided with spiral conveying blade, the upper portion of the side wall of drying cylinder is provided with feed hopper, the side wall of drying cylinder is provided with the downwardly inclined discharge structure, the utility model can be by the spiral conveying blade of rotation setting in drying cylinder interior realizes the fast efficient conveying operation of material, cooperate the heat of the heat of hot blast oven import can realize the efficient drying operation of material in all directions multi-angle, greatly improve the drying efficiency and drying effect of material, more efficient energy saving.

Description

Technical Field

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

[0002] In the processing of chili powder, drying is usually necessary to ensure its storage time and quality, thus extending its shelf life. The drying process directly affects the product's shelf life, flavor retention, and food safety. Traditional drying equipment typically involves pouring chili powder into a drying drum. Due to the small size and poor flowability of chili powder particles, traditional drying drums rely solely on natural hot air blowing, lacking active stirring components. This causes the material to accumulate at the bottom and middle of the drum, resulting in over-drying and clumping of the surface material, while the bottom material still has excessive moisture content, requiring secondary drying. This prolongs the processing cycle, wastes energy, and leads to poor drying results and long processing times. Utility Model Content

[0003] In view of this, the present invention provides a drying device that uses rotating spiral conveying blades inside the drying drum to blow hot air in the opposite direction to the material conveying direction. This achieves efficient and rapid drying of the conveyed material by simultaneously agitating and tumbling the material with the hot air. This solves the problems of traditional drying drums that rely solely on natural hot air blowing, lack active agitation components, and cause material to easily accumulate at the bottom and middle of the drum, resulting in over-drying and clumping of the surface material while the bottom material still has excessive moisture content, requiring secondary drying, which prolongs the processing cycle, wastes electricity, and leads to poor drying effect and long drying time.

[0004] To solve the above-mentioned technical problems, this utility model provides a drying device, including a frame, on which a drying cylinder is mounted. A driving component is mounted at one end of the drying cylinder, and a hot air box connected to the other end is mounted thereto. The air inlet of the hot air box is connected to the air outlet of an electric heater. Inside the drying cylinder, a rotating rod is driven and connected to the output shaft of the driving component. Spiral conveying blades are mounted on the outer side of the rotating rod. A feed hopper is mounted on the upper part of the side wall of the drying cylinder along the material conveying direction. A downward-sloping discharge structure is mounted on the side wall of the drying cylinder near the hot air box. This utility model achieves rapid and efficient material conveying through the rotating spiral conveying blades inside the drying cylinder. Combined with the heat introduced by the hot air box, it enables efficient drying of materials from all directions and angles. This avoids the problems of traditional drying cylinders where material accumulation and lack of agitation components during the drying process result in low drying efficiency, poor drying effect, and reduced overall drying quality of the materials, especially materials accumulated at the bottom or middle of the drying chamber. This also prevents unnecessary energy waste caused by the outer materials being dried before the inner materials are fully dried.

[0005] The discharge structure includes a discharge port on the side wall of the drying cylinder, and a discharge hopper on the outside of the discharge port. The discharge hopper has a U-shaped cross-section. This invention can achieve efficient material discharge by using the structure of the discharge port on the drying cylinder in conjunction with the spiral conveyor blades. Moreover, the discharge hopper can achieve safe and efficient material discharge and collection, making operation more convenient.

[0006] A support rod is provided on the outer wall of the rotating rod located at the discharge port. A fixed plate is provided at the end of the support rod. Multiple elastic elements are provided on the fixed plate. A connecting plate is provided at the other end of the multiple elastic elements. A scraper is provided at the end of the connecting plate, which abuts against the inner wall of the drying cylinder. This utility model can make the support rod, the fixed plate, elastic elements, connecting plate and scraper outside the support rod rotate synchronously by rotating the rotating rod. It can efficiently scrape out the material accumulated at the bottom of the drying cylinder and the material adhering to the side wall of the drying cylinder, so that it is discharged from the discharge hopper and collected.

[0007] The scraper is an arc-shaped structure that matches the curvature of the inner wall of the drying cylinder, which facilitates its contact with the inner wall of the drying cylinder and enables efficient scraping of residual material on the inner wall of the drying cylinder.

[0008] The elastic element is a spring; however, it can also be a tin bronze spring.

[0009] The driving component is a servo motor.

[0010] A filter plate is installed at the end of the drying cylinder near the hot air box.

[0011] The drying cylinder has a hollow inner wall and is filled with inert gases such as helium or argon. This is to enhance the heat preservation effect of the drying cylinder and avoid unnecessary heat loss.

[0012] The housing of the drive unit is mounted on the frame. The output shaft of the drive unit is connected to the rotating rod via a pulley and belt drive. This invention can transmit the rotation of the output shaft of the drive unit to the rotating rod through the pulley and belt, thereby causing the rotating rod and the spiral conveying blades on the outside of the rotating rod to rotate together, thus achieving efficient conveying of materials in the drying drum, making the operation more convenient and efficient.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. Solving the problem of uneven drying: This utility model can blow the hot air generated in the electric heater in the opposite direction to the material conveying direction through the hot air box. The chili powder is actively turned and directionally conveyed by the spiral conveyor blades. Combined with the reverse hot air, it forms a reverse heat exchange, so that the material is fully in contact with the hot air. This avoids the phenomenon of the surface being too dry and the bottom not being dry. The drying uniformity is greatly improved, no secondary drying is required, and the drying effect is better and the efficiency is higher.

[0014] 2. Solving the problems of poor material discharge and spillage: This utility model can quickly receive and discharge materials through the U-shaped discharge hopper and the pushing action of the spiral blades, avoiding blockage of the discharge port. The material discharge efficiency is greatly improved compared with the traditional straight cylinder discharge hopper, and the U-shaped structure effectively prevents material spillage, greatly improving the material collection rate.

[0015] 3. Solving the problem of material residue: This utility model can perfectly match the curvature of the inner wall of the drying cylinder with the arc-shaped scraper, and the elastic element provides continuous resistance, which can efficiently scrape off the chili powder adhering to the cylinder wall and accumulated at the bottom of the cylinder, greatly reducing the amount of residue, reducing material waste, and avoiding mold and contamination of the residual material.

[0016] 4. Solving the problems of poor heat preservation and high energy consumption: This utility model can fill the hollow layer of the drying cylinder with inert gas, which greatly improves the heat utilization rate and significantly reduces energy consumption compared with the traditional solid drying cylinder; at the same time, the reverse hot air design extends the heat exchange time, further reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the drying equipment of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a side view of the drying equipment of this utility model; Figure 4 This utility model Figure 3 Sectional view at point BB.

[0018] Explanation of reference numerals in the attached drawings: 100, frame; 200, drying cylinder; 201, feed hopper; 202, discharge structure; 203, discharge port; 204, discharge hopper; 300, driving component; 400, hot air box; 500, rotating rod; 600, spiral conveyor blade; 700, support rod; 800, fixed plate; 900, elastic component; 110, connecting plate; 210, scraper; 310, filter plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-4The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0020] like Figure 1-4 As shown: This embodiment provides a drying device, including a frame 100. The frame 100 is made of Q235-A carbon structural steel, which has load-bearing stability. A drying cylinder 200 is provided on the frame 100. The inner wall of the drying cylinder 200 is polished to reduce the probability of chili powder adhesion. One end of the drying cylinder 200 is equipped with a drive unit 300, and the other end is connected to a hot air box 400 via a flange. The air inlet of the hot air box 400 is connected to the air outlet of the electric heater, and the air inlet of the hot air box 400 and the air outlet of the electric heater are connected by a high-temperature resistant silicone tube. The electric heater is an SRY3 series tubular electric heater manufactured by Yancheng Huabang Electric Heating Equipment Co., Ltd., using nickel-chromium alloy heating wire, grade Cr20Ni80, with a 304 stainless steel sleeve on the surface. Inside the drying cylinder 200, there is a rotating rod 500 that is driven and connected to the output shaft of the drive unit 300. The rotating rod 500 is made of 45# steel and chrome-plated to enhance wear resistance. Spiral conveying blades 600 are provided on the outside of the rotating rod 500, and 304 stainless steel is welded to the outside of the rotating rod 500. Stainless steel spiral conveyor blades 600 are used to convey and tumble the chili powder. A feed hopper 201 is provided on the upper side wall of the drying cylinder 200 along the material conveying direction, and a downward-sloping discharge structure 202 is provided on the side wall of the drying cylinder 200 near the hot air box 400. This utility model can achieve fast and efficient material conveying by the spiral conveyor blades 600 rotating inside the drying cylinder 200. Combined with the heat introduced by the hot air box 400, it can achieve efficient drying of materials from all directions and angles. This avoids the problem of low drying efficiency and poor drying effect caused by the accumulation of materials and lack of agitation components in the traditional drying cylinder 200, especially the materials accumulated at the bottom or middle of the drying box. This affects the overall drying quality of the materials and causes unnecessary energy waste because the external materials are dried while the internal materials are not completely dried.

[0021] According to one embodiment of the present invention, such as Figure 1-3As shown, the discharge structure 202 includes a discharge port 203 located on the side wall of the drying cylinder 200. A discharge hopper 204 is disposed outside the discharge port 203. The discharge hopper 204 has a U-shaped cross-section. Specifically, the discharge port 203 is located at the lower part of the side wall of the drying cylinder 200, and a 304 stainless steel U-shaped discharge hopper 204 is welded to its outer side. The discharge hopper 204 has an inclination angle of 25° to accelerate the material's descent and prevent accumulation and spillage. This invention achieves efficient material discharge through the structure of the discharge port 203 on the drying cylinder 200 in conjunction with the spiral conveyor blades 600. Furthermore, the discharge hopper 204 enables safe and efficient material discharge and collection, making operation more convenient.

[0022] According to another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, a support rod 700 is installed on the outer wall of the rotating rod 500 located at the discharge port 203. A fixing plate 800 is installed at the end of the support rod 700, and multiple elastic elements 900 are installed on the fixing plate 800. A connecting plate 110 is installed at the other end of the multiple elastic elements 900. A scraper 210, which abuts against the inner wall of the drying cylinder 200, is installed at the end of the connecting plate 110. Specifically, three carbon structural steel support rods 700 are welded to the outer side of the rotating rod 500 at the discharge port 203. A 45# steel fixing plate 800 is welded to the end of the support rod 700. Six mounting holes for the elastic elements 900 are evenly distributed on the fixing plate 800. The elastic elements 900 can be selected from 65Mn springs or H62 tin bronze springs. The other end of the elastic element 900 is fixedly connected to the 304 stainless steel connecting plate 110. The arc-shaped scraper 210, made of 65Mn steel, is bolted to the end of the connecting plate 110. The spring steel scraper 210 is perfectly fitted with the inner wall of the drying cylinder 200, ensuring tight contact. This invention allows the rotating rod 500 to simultaneously rotate the support rod 700, as well as the external fixing plate 800, elastic element 900, connecting plate 110, and scraper 210. This enables efficient scraping of materials accumulated at the bottom of the drying cylinder 200 and adhering to its side walls, allowing them to be discharged and collected from the discharge hopper 204.

[0023] According to another embodiment of the present invention, such as Figure 1 and Figure 4 As shown, the scraper 210 is an arc-shaped structure that matches the curvature of the inner wall of the drying cylinder 200, which facilitates its contact with the inner wall of the drying cylinder 200 and enables efficient scraping of the material remaining on the inner wall of the drying cylinder 200.

[0024] The elastic element 900 is a spring; of course, the elastic element 900 can also be a tin bronze spring.

[0025] The drive unit 300 is a servo motor, specifically the MSMD022G1U series servo motor manufactured by Panasonic Electric Works (China) Co., Ltd., which is suitable for the humid and dusty environment of food processing workshops. The motor output shaft and the rotating rod 500 are connected by a gray cast iron pulley, specifically, the small pulley has a diameter of 80mm, the large pulley has a diameter of 160mm, and a neoprene rubber synchronous belt drive. The wrap angle of the small pulley is set to 140° to ensure sufficient transmission torque and avoid slippage.

[0026] A filter plate 310 is installed at the end of the drying cylinder 200 near the hot air box 400. The filter plate 310 is a perforated 304 stainless steel plate to prevent chili powder from entering the hot air box 400 and clogging the air duct. Specifically, the filter plate 310 is fixed to the end of the drying cylinder 200 near the hot air box 400 by bolts, and the diameter of the filter holes on the filter plate 310 is smaller than the minimum diameter of chili powder.

[0027] The drying cylinder 200 has a hollow inner wall structure and is filled with inert gases such as helium or argon. Specifically, the drying cylinder 200 is made of Q345R low-alloy high-strength steel, with a hollow layer on the inner wall. The hollow layer is filled with helium or argon gas with a purity of ≥99.99%. The low thermal conductivity of the inert gas enhances the heat preservation effect and reduces heat loss. This is to enhance the heat preservation effect of the drying cylinder 200 and avoid unnecessary heat loss.

[0028] The housing of the drive component 300 is mounted on the frame 100. The output shaft of the drive component 300 is connected to the rotating rod 500 via a pulley and belt drive. This invention can transmit the rotation of the output shaft of the drive component 300 to the rotating rod 500 through the pulley and belt, thereby causing the rotating rod 500 and the spiral conveying blades 600 on the outside of the rotating rod 500 to rotate together, thus achieving efficient conveying of materials in the drying drum 200, making operation more convenient and efficient.

[0029] How to use this utility model: First, it should be clarified that the drying equipment involved in this utility model is mainly used for the efficient drying of various granular or powdery objects. Taking the drying of chili powder as an example, this utility model will explain its working principle and usage method in detail. The working principle is as follows: First, the electric heater is activated to heat the air, and simultaneously, the axial flow fan is started to quickly and efficiently introduce the heat generated by the electric heater into the hot air box 400. The heat then enters the drying cylinder 200 through the hot air box 400 to preheat the drying cylinder 200, for example, to 55℃-70℃. Next, the output shaft of the drive unit 300 is started to rotate, while the chili powder to be dried is poured into the feed hopper 201. The output shaft of the servo motor, via belt drive, drives the rotating rod 500 inside the drying cylinder 200 to rotate, and the spiral conveying blades 600 on the outside of the rotating rod 500 rotate synchronously. The chili powder to be dried is added uniformly from the feed hopper 201, and the spiral conveying blades 600 push the chili powder along the direction from the end of the drive unit 300 to the end of the hot air box 400. The generated hot air passes through the hot air box 400 along the direction from the end of the hot air box 400 to the end of the drive unit 300. Hot air is blown into the drying cylinder 200 in the opposite direction to the material conveying, forming a reverse heat exchange. As the hot air penetrates the chili powder layer, it absorbs moisture. The filter plate 310, in conjunction with the hot air blowing, effectively prevents chili powder from entering the hot air box 400. The inert gas in the hollow layer of the drying cylinder 200 prevents heat loss, maintaining a stable internal temperature of 62℃. During the rotation of the rotating rod 500, the support rod 700 drives the fixed plate 800, elastic element 900, connecting plate 110, and arc-shaped scraper 210 to rotate synchronously. The elastic force of the elastic element 900 ensures that the scraper 210 remains in close contact with the cylinder wall, scraping away the chili powder adhering to the cylinder wall and accumulated at the bottom. The scraped material is pushed by the spiral blades to the discharge port 203, and then discharged and collected through the U-shaped discharge hopper 204, ultimately yielding dried chili powder. The servo motor can control the material residence time through speed adjustment to adapt to chili powder with different initial moisture contents. The usage method is as follows: Start-up preparation: Check the inert gas pressure and sealing of the hollow layer of the drying drum 200. After confirming there are no leaks, connect the power supply to the servo motor and electric heater. Set the drying temperature to 55-70℃ through the electric heater temperature control panel. This is because chili powder is highly heat-sensitive and the temperature should not exceed 70℃. Start the servo motor, adjust the speed to 50r / min, and preheat it under no-load for 10 minutes. Once the temperature inside the drum reaches the set value and stabilizes, prepare to feed the material.

[0030] Feeding and Drying: Add the chili powder to be dried at a uniform speed through the feed hopper 201. Adjust the rotation speed according to the initial moisture content: the following parameters can be used for matching and adjustment. When the moisture content is 20%-22%, the rotation speed is 80-100 r / min and the residence time is 18-20 minutes; when the moisture content is 16%-19%, the rotation speed is 120-150 r / min and the residence time is 12-15 minutes. Take samples through the discharge port 203 to ensure that the moisture content after drying is ≤8%. Process monitoring: The temperature inside the drying drum is monitored in real time through the temperature detection port on the side wall of the drying drum 200. For example, a K-type thermocouple can be added for temperature detection. When the temperature deviation exceeds ±3℃, the power of the electric heater is adjusted. The discharge status of the discharge hopper 204 is observed. If agglomeration occurs, the feeding rate is reduced by 1-2 kg / h. If more material adheres to the drum wall, the speed of the servo motor is increased by 20-30 r / min to enhance the scraping effect. Shutdown and cleaning: After stopping the feeding, keep the equipment running for 5 minutes to discharge the residual material in the drum; turn off the electric heater, continue to run the servo motor until the temperature inside the drum drops to 30-40℃, and then turn off the motor; disconnect the power supply, open the maintenance door of the drying drum 200, check the wear of the scraper 210, and replace it in time if there is wear. Clean the dust on the surface of the filter plate 310 to ensure smooth use next time.

[0031] This invention utilizes a rotating spiral conveying blade 600 within the drying drum 200 to blow hot air in the opposite direction to the material conveying direction. This achieves efficient and rapid drying of the conveyed material by simultaneously agitating and tumbling the material with the hot air. This solves the problems of traditional drying drums 200, which rely solely on natural hot air blowing and lack active agitation components. As a result, the material tends to accumulate at the bottom and middle of the drum, leading to over-drying and clumping of the surface material while the bottom material still has excessive moisture content, requiring secondary drying. This not only prolongs the processing cycle but also wastes energy, resulting in poor drying effect and long drying time.

[0032] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model according to the specific circumstances.

[0033] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A drying apparatus, comprising a frame (100), characterized in that: A drying cylinder (200) is provided on the frame (100). A driving component (300) is provided at one end of the drying cylinder (200), and a hot air box (400) connected to it is provided at the other end. The air inlet of the hot air box (400) is connected to the air outlet of the electric heater. A rotating rod (500) is provided inside the drying cylinder (200) and is drivenly connected to the output shaft of the driving component (300). A spiral conveying blade (600) is provided on the outside of the rotating rod (500). A feeding hopper (201) is provided on the upper part of the side wall of the drying cylinder (200) along the material conveying direction. An inclined downward discharge structure (202) is provided on the side wall of the drying cylinder (200) near the hot air box (400).

2. The drying equipment as described in claim 1, characterized in that: The discharge structure (202) includes a discharge port (203) opened on the side wall of the drying cylinder (200), and a discharge hopper (204) is provided on the outside of the discharge port (203), and the cross-section of the discharge hopper (204) is U-shaped.

3. The drying equipment as described in claim 2, characterized in that: A support rod (700) is provided on the outer wall of the rotating rod (500) located at the discharge port (203). A fixing plate (800) is provided at the end of the support rod (700). A plurality of elastic elements (900) are provided on the fixing plate (800). A connecting plate (110) is provided at the other end of the plurality of elastic elements (900). A scraper (210) is provided at the end of the connecting plate (110) to abut against the inner wall of the drying cylinder (200).

4. The drying equipment as described in claim 3, characterized in that: The scraper (210) has an arc-shaped structure.

5. The drying equipment as described in claim 3, characterized in that: The elastic element (900) is a spring.

6. The drying equipment as described in claim 1, characterized in that: The driving component (300) is a servo motor.

7. The drying equipment as described in claim 1, characterized in that: A filter plate (310) is provided at the end of the drying cylinder (200) near the side of the hot air box (400).

8. The drying equipment as described in claim 1, characterized in that: The drying cylinder (200) has a hollow inner wall structure.

9. The drying equipment as described in claim 1, characterized in that: The housing of the drive unit (300) is mounted on the frame (100), and the output shaft of the drive unit (300) is connected to the rotating rod (500) by means of pulley and belt drive.

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