Electrically heated air-blast drying oven

Abstract

The application discloses an electric heating air drying oven, and relates to the technical field of drying ovens, which comprises a box body fixedly installed on a drying rack; an inner pipe is rotationally arranged on the box body and extends to the outside of the box body; the inner pipe is internally provided with a plurality of conveying channels uniformly distributed around the axis of the inner pipe; and a stirring pipe corresponding to the conveying channels is installed on the outer wall of the inner pipe; a guide mechanism is arranged outside the box body; the guide mechanism comprises a sleeve for conveying high-temperature gas and fixed to the box body; the end of the inner pipe is rotationally arranged inside the sleeve; a fan plate is fixedly connected to the upper half of the inside of the sleeve; and angle-adjustable adjusting plates are arranged on the two sides of the lower half of the sleeve. The electric heating air drying oven is provided with the conveying channels and the adjusting plates and the like, physical stirring and gas turning are combined, a fan-shaped groove with an adjustable area is formed, directional gathering and precise introduction of high-temperature gas are realized, heat exchange efficiency is ensured, and the use efficiency of the electric heating air drying oven is improved.

Description

Technical Field

[0001] This invention relates to the field of drying oven technology, and in particular to an electrically heated forced-air drying oven. Background Technology

[0002] Electric heating drying ovens are commonly used drying equipment, widely applied in chemical, food, pharmaceutical, electronics, and materials industries. They are primarily used to meet processing needs such as dehydration, drying, and curing of materials. Their core working principle involves generating heat through electric heating elements, which, combined with a blower, delivers hot gas into the oven's internal cavity. This hot gas exchanges heat with the material to be dried, removing moisture and ultimately achieving the drying purpose.

[0003] In existing drying ovens, materials are typically spread out on the horizontally distributed mesh and heated by a heating device located below the mesh. The material is then dried by turning on the heating device. This method makes it difficult to turn the material over, resulting in only the surface of the material coming into contact with the hot airflow. Internal moisture is difficult to dissipate quickly, which can easily lead to localized overheating or uneven drying, thus affecting drying efficiency.

[0004] Therefore, it is necessary to propose an electric heating forced-air drying oven to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an electric heating forced-air drying oven to solve the problems of existing drying ovens, which typically consist of horizontally distributed mesh plates and a heating device located below the mesh plates. The material is spread flat on the mesh plates, and the heating device is turned on to dry it. This method makes it difficult to turn the material over, resulting in only the surface of the material coming into contact with the hot airflow. The internal moisture is difficult to dissipate quickly, which can easily lead to local overheating or uneven drying, thus affecting the drying efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric heating forced-air drying oven, comprising a box body fixedly installed on a drying rack;

[0007] An inner tube is rotatably mounted on the box body, extending to the outside of the box body. The inside of the inner tube has multiple conveying channels evenly distributed around its axis, and an agitator tube corresponding to and connected to the conveying channels is installed on the outer wall of the inner tube.

[0008] The outer side of the chamber is equipped with a guiding mechanism, which includes an outer jacket for conveying high-temperature gas and fixed to the chamber. The end of the inner tube is rotatably disposed inside the outer jacket. The upper half of the inner jacket is fixedly connected to a fan plate. The lower half of the outer jacket is equipped with adjustable adjustment plates on both sides, and the adjustment plates are hinged to the bottom of the fan plate. There is an elastic sheet between the fan plate and the two adjustment plates. The fan plate, the elastic sheet and the adjustment plates are all attached to the end of the inner tube.

[0009] The two adjusting plates form a fan-shaped groove between the bottom of the outer casing and the conveying channel at the bottom of the inner tube is connected and engaged with the fan-shaped groove.

[0010] Preferably, the two adjustment plates are arranged in an inverted V shape.

[0011] Preferably, the outer casing has a sliding channel on its wall for the adjustment plate to slide through, and an arc plate is fixedly connected to the adjustment plate, with the arc plate fitting against the outer wall of the outer casing. The arc length of the arc plate is greater than the arc length of the sliding channel.

[0012] Preferably, the arc plate is provided with a control component, the control component including an electromagnet, the electromagnet being fixedly installed on the concave side of the arc plate, and the electromagnet cooperating with the outer sleeve.

[0013] Preferably, the agitator tube includes a docking section, an elastic section, and a jetting section, which are distributed sequentially in the direction away from the inner tube.

[0014] Preferably, the bottom end of the box is rotatably provided with a bottom shaft, which is distributed along the axial direction of the box. An agitator is fixedly installed on the bottom shaft. A first motor that drives the bottom shaft to rotate is fixedly installed on the outside of the box. The spray section is offset from the agitator and abuts against the bottom shaft.

[0015] Preferably, an elastic strip is fixedly connected between the docking section and the ejection section, and multiple elastic strips are provided, which are evenly distributed around the elastic section.

[0016] Preferably, the thicknesses of the multiple elastic strips are different.

[0017] Preferably, the top of the housing is connected to a suction pipe for connecting to the factory's negative pressure suction pipeline.

[0018] Preferably, the conveying channel has a fan-shaped cross-section along the radial direction of the inner tube.

[0019] The technical effects and advantages of this invention are as follows:

[0020] 1. This invention combines physical agitation with gas tumbling by setting up a conveying channel, adjusting plate and other structures, and forming a fan-shaped groove with adjustable area to achieve directional convergence and precise introduction of high temperature gas, ensuring heat exchange efficiency and improving the utilization efficiency of the electric heating blast drying oven.

[0021] 2. This invention uses an adjusting plate and an elastic sheet to adjust the connecting area at the fan-shaped groove, so that the high-temperature gas is precisely focused on the area where the material is located;

[0022] 3. The fan-shaped slots also have the effect of concentrating airflow, which can gather the dispersed high-temperature gas entering from the outer jacket into a directional airflow, greatly increasing the airflow velocity and pressure, ensuring that the high-temperature gas is efficiently transported to the material accumulation area inside the chamber through the conveying channel, further enhancing the heat exchange effect and improving drying efficiency.

[0023] 4. The posture of the ejection section deflects with the deformation of the elastic section, causing the direction of the high-temperature gas ejected from the nozzle of the ejection section to change synchronously, which can cover material areas that are originally difficult to reach.

[0024] 5. The bending of the elastic section will cause the spray section to oscillate slightly. Combined with the rotation of the stirring tube, it will expand the stirring and air delivery coverage area of ​​the spray section, further improving the uniformity of contact between hot air and materials.

[0025] 6. Setting up flexible sections not only avoids over-drying caused by continuous air supply in localized material accumulation areas, but also utilizes the inertia of airflow return during the moment of air cut-off to help loosen the surrounding accumulated material. Furthermore, through the "accumulation-high-speed jet" airflow pattern, it enhances the impact and penetration of hot air on the material, effectively dispersing locally accumulated material and further improving heat exchange efficiency. At the same time, it forms an intermittent enhanced air supply mode of "air supply-air cut-accumulation-high-speed air supply," which not only ensures drying efficiency but also significantly optimizes drying uniformity.

[0026] 7. The thickness of the multiple elastic strips is different. This differentiated thickness design allows the elastic segment to produce non-uniform elastic deformation when it swings with the bottom shaft, which in turn makes the swing trajectory of the ejection segment more complex, avoids hot air being concentrated in a fixed area, and further optimizes the hot air distribution.

[0027] 8. The stirring tube, together with multiple elastic strips, forms a large stirring structure, which not only expands the radial coverage dimension of the stirring structure, but also forms a flexible stirring range that can adapt to the material accumulation state by utilizing its own elastic properties.

[0028] 9. The bottom shaft and stirring blades are installed to turn over the material at the bottom of the chamber, improve the drying effect, and assist in the deformation of the stirring tube. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the electric heating forced-air drying oven of the present invention from one perspective.

[0030] Figure 2 This is a schematic diagram of the electric heating forced-air drying oven of the present invention from another perspective.

[0031] Figure 3 This is a schematic diagram of the drying oven and inner tube structure of the present invention.

[0032] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0033] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B.

[0034] Figure 6 This is a schematic diagram of the inner tube and stirring tube structure of the present invention.

[0035] Figure 7 This is a schematic diagram of the ejection section and bottom shaft structure of the present invention.

[0036] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point C.

[0037] Figure 9 This is a schematic diagram of the inner tube and outer sleeve structure of the present invention.

[0038] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point D.

[0039] Figure 11 This is a schematic diagram of the fan plate and outer casing structure of the present invention.

[0040] Figure 12 This is a schematic diagram of the fan-shaped groove and elastic sheet structure of the present invention.

[0041] Figure 13 This is a schematic diagram of the ear plate and adjustment plate structure of the present invention.

[0042] In the diagram: 1. Drying rack; 2. Box body; 3. Inner tube; 301. Shaft frame; 4. Conveying channel; 5. Agitating tube; 501. Connecting section; 502. Elastic section; 503. Spraying section; 6. Elastic strip; 7. Outer jacket; 8. Fan plate; 9. Ear plate; 10. Adjusting plate; 11. Fan-shaped groove; 12. Elastic sheet; 13. Spindle; 14. Sliding channel; 15. Arc plate; 16. Electromagnet; 17. Support; 18. Bottom shaft; 19. Agitating blade; 20. First motor; 21. Pulling pipe; 22. Material trough; 23. Cover plate; 24. Hot air equipment; 25. Conveying pipe; 26. Second motor. Detailed Implementation

[0043] This invention provides, for example Figures 1 to 13The electric heating forced-air drying oven shown includes a drying rack 1, which is fixed to the workshop floor by bolts or other structures. A box body 2 is fixedly installed on the drying rack 1. The box body 2 is a horizontal, barrel-shaped structure made of stainless steel, with a polished inner wall to reduce material adhesion and facilitate cleaning. Insulation cotton is installed on the outer wall to achieve heat preservation. This drying oven is suitable for dehydrating and drying grain particles, lactose granules, etc., and can be adjusted according to specific usage conditions. A material trough 22 is provided on the side of the box body 2, and a cover plate 23 is snapped into the inside of the material trough 22. The cover plate 23 and... A sealing ring is provided at the snap-fit ​​joint of the material trough 22. The sealing ring is made of high-temperature resistant silicone material, which can ensure the sealing of the material trough 22 after the cover plate 23 is closed, prevent the leakage of hot gas in the chamber 2, and ensure drying efficiency. The outer surface of the cover plate 23 is provided with a non-slip handle, which makes it easy for operators to open and close the cover plate 23. At the same time, the cover plate 23 is also provided with an observation window, which is made of high-temperature resistant tempered glass. Operators can observe the drying status of the material in the chamber 2 in real time through the observation window. In actual use, the operator removes the cover plate 23 and loads or unloads the material from the material trough 22.

[0044] An inner tube 3 is rotatably mounted on the housing 2. The inner tube 3 is concentrically distributed with the housing 2. One end of the inner tube 3 extends to the outside of the housing 2, and this end extending to the outside of the housing 2 is designed to be open. A shaft bracket 301 is fixedly connected inside the inner tube 3. The shaft bracket 301 is distributed along the axial length direction of the inner tube 3 and divides the inside of the inner tube 3 into multiple conveying channels 4. The multiple conveying channels 4 are evenly distributed around the axis of the inner tube 3. At the same time, an agitator tube 5 is installed on the outer wall of the inner tube 3. Multiple agitator tubes 5 are provided, and the agitator tubes 5 are connected to the corresponding conveying channels 4.

[0045] A second motor 26 is fixedly installed on the outer wall of the box 2. The inner tube 3 is fixedly connected to the drive shaft of the second motor 26. The second motor 26 drives the inner tube 3 to rotate, and the inner tube 3 drives the stirring tube 5 to rotate, thereby stirring the material inside the box 2.

[0046] Considering that the material mainly concentrates in the lower half of the chamber 2 due to its own gravity, and the water vapor generated during drying will float upwards, if air is directly supplied to the entire interior of the chamber 2, the airflow will easily diffuse in the upper half of the chamber 2, making it difficult to accurately target the material accumulation area. This will result in insufficient heat exchange, reduced drying efficiency, and obstruction of water vapor discharge, which may also cause the material to become damp again. To improve drying quality, a guiding mechanism is installed on the outside of the chamber 2. The guiding mechanism includes an outer sleeve 7, on which a bracket 17 is fixedly connected. The bracket 17 is fixedly connected to the outer wall of the chamber 2, thereby fixing the position of the outer sleeve 7. The end of the inner tube 3 is rotatably located inside the outer sleeve 7. Ball bearings, sealing rings, and other structures are installed between the outer wall of the inner tube 3 and the inner wall of the outer sleeve 7 to reduce wear and ensure sealing.

[0047] Meanwhile, a hot air device 24 is fixedly installed on the drying rack 1. The hot air device 24 includes a blower, a filter screen, an electric heating plate, and other structures. The hot air device 24 is connected to the end of the outer jacket 7 away from the inner tube 3 through a conveying pipe 25. During operation, the blower of the hot air device 24 draws in outside air, filters it, and heats it to a preset temperature through the electric heating plate to form high-temperature gas. The high-temperature gas is stably transported to the inside of the outer jacket 7 through the conveying pipe 25, and then introduced into the inside of the inner tube 3. It is then ejected from the end of the stirring pipe 5, providing a stable heat source for the drying process. The ejection of the high-temperature gas also causes the material to tumble, that is, a combination of physical stirring and gas tumbling.

[0048] The cross-section of the conveying channel 4 along the radial direction of the inner tube 3 is fan-shaped.

[0049] The upper half of the inner part of the outer casing 7 is fixedly connected to a fan plate 8. Sliding channels 14 are provided on both sides of the lower half of the outer casing 7. Adjusting plates 10 are slidably arranged inside the sliding channels 14. Ear plates 9 are fixedly connected to the bottom of the fan plate 8. A spindle 13 is fixedly connected to the ear plate 9. The spindle 13 is concentrically distributed with the outer casing 7. The ends of the two adjusting plates 10 that are close to each other are rotatably arranged on the spindle 13. The two adjusting plates 10 are arranged in an inverted V shape. The adjusting plates 10 can swing flexibly around the spindle 13 to realize the opening and closing action.

[0050] The outer casing 7 has an elastic sheet 12 inside. The elastic sheet 12 is made of high-temperature resistant rubber. The elastic sheet 12 is fixedly connected between the fan plate 8, the inner wall of the outer casing 7 and the two adjusting plates 10. At the same time, the fan plate 8, the elastic sheet 12 and the adjusting plates 10 are all attached to the end of the inner tube 3. High-temperature resistant rubber pads are set at the contact points between the fan plate 8, the adjusting plates 10 and the end of the inner tube 3 to reduce wear and ensure sealing.

[0051] To accommodate the swing stroke of the adjusting plate 10, the curvature of the sliding channel 14 matches the swing trajectory of the adjusting plate 10, allowing the outer end of the adjusting plate 10 to slide through.

[0052] A fan-shaped groove 11 is formed between the two adjusting plates 10 and the bottom of the outer jacket 7, which is adapted to the shape of the conveying channel 4.

[0053] Meanwhile, an arc plate 15 is fixedly connected to the adjusting plate 10, and the arc plate 15 is attached to the outer wall of the outer sleeve 7. The arc length of the arc plate 15 is greater than the arc length of the sliding channel 14, so the arc plate 15 can always keep the sliding channel 14 closed. A rubber sealing gasket is adhered to the concave side of the arc plate 15. The sealing gasket is made of high temperature resistant and high elastic silicone material to ensure sealing.

[0054] The conveying channel 4 at the bottom of the inner tube 3 is connected to the fan-shaped groove 11. The fan plate 8, elastic sheet 12 and adjusting plate 10 work together to close the end of the conveying channel 4 in the upper half of the inner tube 3 to prevent gas from entering. When the high-temperature gas enters the fan-shaped groove 11 from the outer jacket 7, it will flow to the conveying channel 4 at the bottom of the inner tube 3 under its guidance and be sprayed out by the corresponding stirring pipe 5, realizing the directional convergence and precise introduction of the high-temperature gas. This structural design can ensure that the high-temperature gas can be efficiently transported to the material accumulation area (lower half) inside the box 2 through the inner tube 3, avoiding the irregular diffusion of the high-temperature gas in the upper half of the box 2. This not only improves the heat exchange efficiency, but also does not interfere with the upward floating and discharge of water vapor generated during drying. Structurally, it solves the defects of traditional overall air supply, effectively ensures the drying quality and prevents the material from being moistened again.

[0055] In summary, by setting up structures such as the conveying channel 4 and the adjusting plate 10, the present invention combines physical agitation with gas tumbling, and simultaneously forms an adjustable fan-shaped groove 11, thereby achieving directional convergence and precise introduction of high-temperature gas, ensuring heat exchange efficiency, and improving the utilization efficiency of the electric heating blast drying oven.

[0056] In addition, it also has the effect of concentrating airflow, which can gather the dispersed high-temperature gas entering from the outer jacket 7 into a directional airflow, greatly increasing the airflow velocity and pressure, ensuring that the high-temperature gas is efficiently transported through the conveying channel 4 to the material gathering area inside the box 2, further enhancing the heat exchange effect and improving drying efficiency.

[0057] Furthermore, considering the varying amounts of material being dried inside the chamber 2, if the fan-shaped groove 11 still maintains a large area when the amount of material is small, the duration of the agitator 5 being in the air supply state will increase, and the air supply range will expand accordingly. This will cause the high-temperature gas to be too dispersed and difficult to accurately focus on the area where a small amount of material is located, thus reducing the heat exchange efficiency. In this invention, the connecting area of ​​the fan-shaped groove 11 is adjusted by the cooperation of the adjusting plate 10 and the elastic sheet 12.

[0058] In actual operation: When the amount of material being dried inside chamber 2 is small, control the bottom ends of the two adjusting plates 10 to move closer together (refer to...). Figure 12 At this time, the area of ​​the fan-shaped groove 11 decreases, and the time it takes for the conveying channel 4 at the bottom of the inner tube 3 to connect with the fan-shaped groove 11 is reduced. This reduces the time the stirring tube 5 is in the air supply state, and the air supply range is correspondingly reduced. The high-temperature gas is precisely focused on the area where a small amount of material is located. When the amount of material being dried inside the box 2 is large, the bottom ends of the two adjusting plates 10 are controlled to move away from each other (refer to...). Figure 12 At this time, the area of ​​the fan-shaped groove 11 increases, the duration of the stirring tube 5 in the air supply state increases, the air supply range increases accordingly, and the coverage area of ​​the high temperature gas is expanded.

[0059] To fix the angle of the adjustment plate 10, a control component is provided on the arc plate 15. The control component includes an electromagnet 16, which is fixedly installed on the concave side of the arc plate 15. The outer sleeve 7 is made of stainless steel that can be affected by magnetic force. When the angle of the adjustment plate 10 is adjusted, the electromagnet 16 is activated to attract and fix it on the outer sleeve 7, thereby fixing the arc plate 15 and the adjustment plate 10 and ensuring the stability of use.

[0060] In actual use, scales can be set between the outer jacket 7 and the arc plate 15 to facilitate precise adjustment by the operator. Automatic adjustment can also be performed using structures such as electric push rods, depending on the specific usage.

[0061] The top of the box 2 is connected to a suction pipe 21 for connecting to the factory's negative pressure suction pipeline. Suction is performed by the suction pipe 21 to ensure the air circulation inside the box 2 and to remove moisture in time. A filter screen can be installed at the suction pipe 21 to prevent materials from being sucked away.

[0062] To improve drying efficiency, a bottom shaft 18 is rotatably mounted at the bottom of the chamber 2. The bottom shaft 18 is distributed along the axial direction of the chamber 2, and multiple stirring blades 19 are fixedly installed on the bottom shaft 18. A first motor 20, which drives the bottom shaft 18 to rotate, is fixedly installed on the outside of the chamber 2. The stirring tube 5 is staggered from the stirring blades 19 to prevent collision. When the first motor 20 rotates, it can drive the bottom shaft 18 and stirring blades 19 to rotate smoothly, thereby turning over the material at the bottom of the chamber 2 and improving the drying effect.

[0063] In addition, the stirring tube 5 includes a docking section 501, an elastic section 502, and a spraying section 503. The docking section 501, the elastic section 502, and the spraying section 503 are distributed sequentially away from the inner tube 3. The docking section 501 and the spraying section 503 are both made of stainless steel, while the elastic section 502 is made of a flexible elastic material (such as food-grade silicone or high-temperature resistant elastic plastic) that is resistant to high temperature and repeated bending fatigue. It can adapt to the high temperature environment of hot air and can withstand long-term bending and reset cycles, and its service life meets the requirements of the working conditions. The spraying section 503 abuts against the bottom shaft 18. A rubber sleeve is provided on the outer wall of the spraying section 503 to reduce wear from contact with the bottom shaft 18. A filter screen is provided at the spraying section 503 to prevent material from entering.

[0064] An elastic strip 6 is fixedly connected between the docking section 501 and the ejection section 503. Multiple elastic strips 6 are provided and are evenly distributed around the elastic section 502 to form circumferential support for the elastic section 502. The elastic strip 6 has good elastic recovery ability.

[0065] Reference Figure 7When the inner tube 3 drives the stirring tube 5 to rotate synchronously, stirring the material inside the box 2, the spray section 503 rotates with the stirring tube 5 until it contacts the bottom shaft 18. The bottom shaft 18 then generates a blocking and supporting force on the spray section 503, which forces the elastic section 502 to undergo directional bending deformation. During this process, on the one hand, the posture of the spray section 503 deflects with the deformation of the elastic section 502, causing the direction of the high-temperature gas ejected from the nozzle of the spray section 503 to change synchronously, thus covering material areas that were originally difficult to reach. On the other hand, the bending of the elastic section 502 causes the spray section 503 to oscillate slightly, which, in conjunction with the rotation of the stirring tube 5, expands the stirring and air delivery coverage area of ​​the spray section 503, further improving the uniformity of contact between the hot air and the material.

[0066] Furthermore, at the extreme position of the bending deformation of the elastic section 502, the two sides of its inner wall near the ejection section 503 will briefly come into contact. At this time, the hot air channel inside the stirring tube 5 is temporarily blocked, and the gas cannot be ejected from the ejection section 503. Since the hot air device 24 continuously supplies high-temperature gas into the stirring tube 5, after the channel is blocked, the gas will accumulate briefly inside the elastic section 502, which will exert outward pressure on the inner wall of the elastic section 502, forcing the elastic section 502 to expand. When it is separated from the bottom shaft 18, the elastic section 502 will reset under the elastic restoring force of the elastic strip 6. After the two sides of the inner wall separate and the channel is restored, the accumulated high-temperature gas will be ejected at high speed from the nozzle of the ejection section 503 under the dual assistance of its own pressure and the reset elastic force of the elastic section 502. This design not only avoids over-drying caused by continuous airflow in localized material accumulation areas, but also utilizes the inertia of airflow recirculation at the moment of air cut-off to help loosen the surrounding accumulated material. Furthermore, through the "accumulation-high-speed jet" airflow pattern, it enhances the impact and penetration of hot air on the material, effectively dispersing locally accumulated material and further improving heat exchange efficiency. At the same time, it forms an intermittent enhanced airflow pattern of "airflow-air cut-accumulation-high-speed airflow," which not only ensures drying efficiency but also significantly optimizes drying uniformity.

[0067] During the above process, the elastic strip 6 can share the force of the elastic segment 502, thus extending its service life.

[0068] The multiple elastic strips 6 have different thicknesses. This differentiated thickness design allows the elastic segment 502 to produce non-uniform elastic deformation when it swings with the bottom shaft 18, which in turn makes the swing trajectory of the ejection segment 503 more complex, avoids hot air from being concentrated in a fixed area, and further optimizes the hot air distribution.

[0069] In addition, the stirring tube 5 and multiple elastic strips 6 work together to form a large stirring structure, which not only expands the radial coverage dimension of the stirring structure, but also forms a flexible stirring range that can adapt to the material accumulation state by utilizing its own elastic properties.

[0070] The first motor 20, the second motor 26, and others are all connected to the factory's power supply and connected to the factory's automatic control system. This system can automatically adjust the start / stop status and speed of the motors according to preset drying process parameters (such as drying temperature, time, and material type). It can also achieve coordinated control with components such as hot air equipment 24 and negative pressure suction system, which greatly reduces the intensity of manual operation and ensures the accuracy and stability of the drying process. The power supply and automatic control system are common existing technologies and will not be described in detail here.

Claims

1. An electrically heated forced-air drying oven, characterized in that: Includes a box (2) that is fixedly installed on a drying rack (1); An inner tube (3) is rotatably installed on the box (2). The inner tube (3) extends to the outside of the box (2). The inner tube (3) has multiple conveying channels (4) evenly distributed around its axis. An agitator (5) is installed on the outer wall of the inner tube (3) and communicates with the conveying channels (4). The outer side of the box (2) is provided with a guide mechanism, which includes an outer jacket (7) for conveying high temperature gas and fixed on the box (2). The end of the inner tube (3) is rotatably disposed inside the outer jacket (7). The upper half of the inner side of the outer jacket (7) is fixedly connected with a fan plate (8). The lower half of the outer jacket (7) is provided with adjustable adjustment plates (10) on both sides. The adjustment plates (10) are hinged to the bottom of the fan plate (8). There is an elastic sheet (12) between the fan plate (8) and the two adjustment plates (10). The fan plate (8), the elastic sheet (12) and the adjustment plates (10) are all attached to the end of the inner tube (3). A fan-shaped groove (11) is formed between the two adjusting plates (10) and the bottom of the outer sleeve (7). The conveying channel (4) at the bottom of the inner tube (3) is rotated to connect with the fan-shaped groove (11). The outer casing (7) has a sliding channel (14) for the adjustment plate (10) to slide through. An arc plate (15) is fixedly connected to the adjustment plate (10), and the arc plate (15) is attached to the outer wall of the outer casing (7). The arc length of the arc plate (15) is greater than the arc length of the sliding channel (14). A control component is provided on the arc plate (15), the control component includes an electromagnet (16), the electromagnet (16) is fixedly installed on the recessed side of the arc plate (15), and the electromagnet (16) cooperates with the outer sleeve (7); The stirring tube (5) includes a docking section (501), an elastic section (502) and a spraying section (503), which are distributed sequentially in the direction away from the inner tube (3); The bottom end of the box (2) is rotatably provided with a bottom shaft (18), which is distributed along the axial direction of the box (2). An agitator (19) is fixedly installed on the bottom shaft (18). A first motor (20) that drives the bottom shaft (18) to rotate is fixedly installed on the outside of the box (2). The spray section (503) is offset from the agitator (19), and the spray section (503) abuts against the bottom shaft (18).

2. The electric heating forced-air drying oven according to claim 1, characterized in that: The two adjustment plates (10) are arranged in an inverted V shape.

3. The electric heating forced-air drying oven according to claim 1, characterized in that: An elastic strip (6) is fixedly connected between the docking section (501) and the ejection section (503). Multiple elastic strips (6) are provided, and the multiple elastic strips (6) are evenly distributed around the elastic section (502).

4. An electric heating forced-air drying oven according to claim 3, characterized in that: The thickness of the elastic strips (6) varies.

5. An electric heating forced-air drying oven according to claim 1, characterized in that: The top of the box (2) is connected to a suction pipe (21) for connecting to the factory's negative pressure suction pipe.

6. An electric heating forced-air drying oven according to claim 1, characterized in that: The conveying channel (4) has a fan-shaped cross section along the radial direction of the inner tube (3).

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