A continuous drying apparatus
By designing spiral blades and a brush structure, combined with a sealed shell and zoned airflow control, the problems of material adhesion and heat loss in traditional drying equipment are solved, achieving a highly efficient and energy-saving material drying process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- B-FCTL (SHIZUISHAN) LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-06-02
AI Technical Summary
In traditional drying equipment, material adheres to the inner wall of the drum, resulting in low drying efficiency and difficulty in cleaning, which affects production efficiency and cost.
Design a continuous drying device that uses a spiral blade and brush structure. The spiral blade provides axial thrust to make the material move evenly, the brush cleans the inner wall, and combined with micro air holes, it cleans stubborn materials. The external sealed structure retains heat, and the airflow is controlled in zones to recover the heat of the waste gas.
It improves the contact efficiency between materials and hot air, prevents material adhesion, reduces energy consumption, improves drying efficiency and cleanliness, and reduces production costs.
Smart Images
Figure CN224316637U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material drying technology, specifically to a continuous drying device. Background Technology
[0002] In many industrial production and processing fields, drying of materials is a crucial step. The drying process can effectively remove moisture from materials, facilitating subsequent storage, transportation, and further processing.
[0003] Currently, there are many types of drying equipment on the market, but most of them have some shortcomings. Traditional drying equipment usually uses a fixed drying drum, in which the material moves slowly as the drum rotates. This single material movement method results in insufficient contact between the material and the hot air, low drying efficiency, and uneven drying effect. Some materials may be over-dried due to excessive contact with hot air, while others may not reach the ideal drying degree due to insufficient contact with hot air.
[0004] Furthermore, during the drying process, materials tend to adhere to the inner wall of the drying drum. Over time, this adhered material accumulates, not only occupying valuable space inside the drum and reducing drying efficiency, but also potentially affecting hot air circulation and further worsening the drying effect. Moreover, cleaning this adhered material often requires manual intervention by stopping the machine, increasing production costs and extending the production cycle. Utility Model Content
[0005] This utility model provides a continuous drying device to solve the problem of low drying efficiency caused by material adhesion in the drying device.
[0006] To address the aforementioned problems, this utility model provides a continuous drying device, comprising: a feeding device, a drying drum connected to the feeding device, a discharging device connected to one end of the drying drum, a heat exchanger located above the drying drum, a conveying pipe connected to the heat exchanger and located below the drum, a return pipe connected to the heat exchanger and located above the drying drum, and ventilation mesh holes on the surface of the drying drum; further comprising: a telescopic drive shaft located inside the drying drum, a servo motor connected to one end of the telescopic drive shaft, and several brushes fixed on the telescopic drive shaft. Through this design, during the drying process, the brushes can rotate with the telescopic drive shaft to clean the inner wall of the drying drum, effectively preventing material from adhering to the inner wall of the drum, ensuring the continuous and stable operation of the drying device, and improving drying efficiency.
[0007] According to one embodiment of the present invention, a plurality of spiral blades are welded to the inner wall of the drying drum. Through the above scheme, the spiral structure of the spiral blades can generate an axial pushing force on the material entering the drum when the drying drum rotates, so that the material moves forward evenly and continuously along the axis of the drum, avoiding local accumulation or stagnation of the material in the drum, and ensuring the continuity and stability of the drying process.
[0008] According to one embodiment of the present invention, two fixed baffles are vertically welded to the outer edge of the spiral blade. The fixed baffles are circular in structure. Through the above solution, the presence of the fixed baffles makes the movement trajectory of the material on the spiral blade more tortuous. The material will be blocked and guided by the baffles during its forward movement, dividing the material into different small areas. This increases the residence time and movement path of the material in the drying drum, allowing the material to have more opportunities to exchange heat with the hot air, and the moisture can evaporate more fully, effectively improving the drying efficiency.
[0009] According to one embodiment of the present invention, the rotation direction of the spiral blades and the brush is opposite. With the above scheme, the brush rotates in opposite directions, which can generate relatively large shearing force and friction force, and more effectively scrape off the material adhering to the drying drum and the spiral blades, prevent the material from accumulating and clumping on the inner wall of the drying drum and the spiral blades, ensure the unobstructed ventilation mesh channel and the normal conveying function of the spiral blades, and thus maintain the stable and efficient operation of the drying device.
[0010] According to one embodiment of this utility model, the brush is provided with a brush rod, one end of which is fixedly connected to a telescopic transmission shaft. A plurality of brush heads are provided at one end of the brush rod. Through this scheme, the brush rod connects and fixes the multiple brush heads to the telescopic transmission shaft. Driven by the telescopic transmission shaft, the brush heads can cover a large area of the inner wall of the drying drum. The brush heads can penetrate deep into the uneven areas and crevices of the inner wall of the drum, more comprehensively and thoroughly cleaning the adhered materials, effectively reducing material residue, ensuring the cleanliness of the inside of the drying drum, and maintaining the efficient operation of the drying device.
[0011] According to one embodiment of this utility model, the brush rod with a brush head at one end is provided with micro air holes, and the end of the brush rod away from the servo motor is provided with a micro air storage chamber. Through the above scheme, during the drying process, some materials may stubbornly adhere to the brush head, the inner wall of the drying drum, or the spiral blades due to high viscosity or hardening after drying. Under the action of the pulse control signal, the micro air holes can spray high-pressure gas from the micro air storage chamber at regular intervals and in a quantitative manner, generating a strong impact force on the adhered materials, cleaning the brush, and blowing off stubborn materials that are difficult to clean directly, significantly improving the cleaning effect and ensuring the cleanliness of the inside of the drying device.
[0012] According to one embodiment of the present invention, the drying drum is provided with a sealed outer shell, and a gas conveying space is provided at the bottom of the sealed outer shell. Through the above scheme, the sealed outer shell isolates the drying drum from the external environment, forming a relatively closed space, which effectively reduces the heat loss during the drying process. More heat is retained inside the sealed outer shell and used to heat the drying drum and the materials inside, thereby reducing energy consumption, improving heat utilization, and saving drying costs.
[0013] According to one embodiment of this utility model, the gas conveying space is provided with two partitions, and the conveying pipe is provided with three electric valves. The conveying pipe is provided with several air holes, which are located on the right side of the electric valves. Through the above scheme, the gas conveying space is divided into three areas, and the airflow in each area can be independently controlled. The material characteristics and drying progress of different areas may be different. By adjusting the opening of the electric valves in each area individually, the airflow rate and airflow speed entering each area can be precisely controlled, so that the hot air is more rationally distributed to different areas, meeting the drying needs of materials at different drying stages and locations, and improving drying efficiency.
[0014] According to one embodiment of the present invention, the aforementioned return pipe is located on the outer wall of the sealed shell, and a sealed channel connected to the return pipe is provided above the sealed shell. Through the above scheme, during the drying process, the sealed shell will be filled with exhaust gas carrying a large amount of heat. The return pipe is located on the outer wall of the sealed shell, and the sealed channel is located above and connected to it, so that the exhaust gas naturally rises into the sealed channel and is then smoothly discharged through the return pipe. The heat in the exhaust gas is effectively recovered, reducing the direct loss of heat to the external environment, improving energy utilization, and reducing drying costs.
[0015] The technical advantages of this application are as follows:
[0016] The continuous drying device provided in this application, by setting up a brush and micro air holes on the brush, allows the brush to rotate with the telescopic transmission shaft to clean the inner wall of the drying drum, effectively preventing materials from adhering to the inner wall of the drum, ensuring the continuous and stable operation of the drying device, and improving drying efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a continuous drying device provided by this utility model.
[0018] Figure 2 This is a schematic diagram of the structure of a continuous drying device without a sealed outer shell provided by this utility model.
[0019] Figure 3 This is a cross-sectional structural diagram of a continuous drying device provided by this utility model.
[0020] Figure 4 This is a schematic diagram of the telescopic transmission shaft in state two of a continuous drying device provided by this utility model.
[0021] Figure 5 This utility model provides Figure 3 A magnified detail diagram of point A.
[0022] Figure 6 This is a rear view structural diagram of a continuous drying device provided by this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Feeding device; 2. Sealed outer shell; 3. Heat exchanger; 4. Return pipe; 5. Discharge device; 6. Gas conveying space; 7. Electric valve; 8. Drying drum; 801. Spiral blade; 802. Brush; 8021. Brush head; 8022. Brush rod; 803. Telescopic drive shaft; 804. Servo motor; 805. Fixed baffle; 806. Miniature air storage chamber; 807. Turntable; 808. Air pump; 809. Drum servo motor; 9. Conveying pipe; 10. Baffle. Detailed Implementation
[0025] The following will be combined with the appendix Figures 1-5 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.
[0026] Reference Figures 1-5 This utility model provides a continuous drying device, including: a feeding device 1, a drying drum 8 connected to the feeding device 1, a discharging device 5 connected to one end of the drying drum 8, a heat exchanger 3 located above the drying drum 8, a conveying pipe 9 connected to the heat exchanger 3 and located below the drum, a return pipe 4 connected to the heat exchanger 3 and located above the drying drum 8, and ventilation mesh holes on the surface of the drying drum 8, which are filters that only allow air to pass through. It also includes a telescopic drive shaft 803 located inside the drying drum 8, a servo motor 804 connected to one end of the telescopic drive shaft 803, and several brushes 802 fixed on the telescopic drive shaft 803. Through the above scheme, during the drying process, the brushes 802 can rotate with the telescopic drive shaft 803 to clean the inner wall of the drying drum 8, effectively preventing material from adhering to the inner wall of the drum, ensuring the continuous and stable operation of the drying device, and improving drying efficiency.
[0027] The aforementioned drying device is equipped with a main drive unit, which includes a conveyor drive motor, a drum drive motor 809, and a discharge drive motor. The feeding device 1 typically uses a conveyor belt (not shown in the figure) to transport materials into the drum. The discharge device 5 uses a conveyor belt (not shown in the figure) to output materials to a collection device. The conveyor belt of the feeding device 1 is driven by the conveyor drive motor, and the conveyor belt of the discharge device 5 is driven by the discharge drive motor. The drum drive motor 809 is located outside the feeding device 1 and is connected to a reduction gearbox (not shown in the figure), which drives the drying drum 8 to rotate.
[0028] The aforementioned telescopic drive shaft 803 generally consists of a shaft tube, a telescopic sleeve, and a lead screw and nut mechanism. The servo motor 804 consists of two motors. One motor drives the lead screw mechanism, which cooperates with the telescopic sleeve to control the axial displacement of the drive shaft. The other motor is connected to a reduction gear set, which cooperates with the shaft tube to drive the drive shaft to rotate. The servo motor 804 is fixed on a turntable 807, which is located at the material inlet of the drying drum 8. The servo motor 804 is connected to the shaft tube via bearings. The telescopic drive shaft 803 is positioned in the middle of a fixed baffle 805 via bearings, ensuring that the maximum telescopic extension of the telescopic drive shaft 803 does not exceed the length of the drum.
[0029] The inner wall of the drying drum 8 is welded with several spiral blades 801. Through the above scheme, the spiral structure of the spiral blades 801 can generate an axial pushing force on the material entering the drum when the drying drum 8 rotates, so that the material moves forward evenly and continuously along the axis of the drum, avoiding local accumulation or stagnation of the material in the drum, and ensuring the continuity and stability of the drying process.
[0030] Two fixed baffles 805 are vertically welded to the outer edge of the aforementioned spiral blades 801. The fixed baffles 805 are circular in structure, forming a material channel between themselves and the two spiral blades 801. The two fixed baffles 805 divide the drying drum 8 into three drying zones. Through this design, the presence of the fixed baffles 805 makes the material's movement trajectory on the spiral blades 801 more tortuous. As the material moves forward, it is blocked and guided by the baffles, dividing it into different small areas. This increases the material's residence time and movement path within the drying drum 8, allowing for more opportunities for heat exchange with the hot air, resulting in more complete moisture evaporation and effectively improving drying efficiency.
[0031] The spiral blades 801 and the brush 802 rotate in opposite directions. With the above scheme, the brush 802 rotates in the opposite direction, which can generate relatively large shearing force and friction force, and more effectively scrape off the material adhering to the drying drum 8 and the spiral blades 801. This prevents the material from accumulating and clumping on the inner wall of the drying drum 8 and the spiral blades 801, ensuring that the ventilation mesh channel is unobstructed and the spiral blades 801 can carry out normal conveying function, thereby maintaining the stable and efficient operation of the drying device.
[0032] The aforementioned brush 802 is equipped with a brush rod 8022, one end of which is fixedly connected to the telescopic drive shaft 803. One end of the brush rod 8022 has several brush heads 8021, the length of which is longer than the width of the spiral blades 801. The brush 802 is made of polyetheretherketone (PEEK), which is temperature and corrosion resistant. The brush heads 8021 can be made into ultra-fine filaments with a diameter of 0.1mm, which can bend 30° when in contact with the spiral blades without permanent deformation. Through this design, the brush rod 8022 connects and fixes multiple brush heads 8021 to the telescopic drive shaft 803. Driven by the telescopic drive shaft 803, the brush heads 8021 can cover a large area of the inner wall of the drying drum 8. The brush heads 8021 can penetrate into the uneven areas and crevices of the drum's inner wall, more comprehensively and thoroughly cleaning the adhered material, effectively reducing material residue, ensuring the cleanliness of the inside of the drying drum 8, and maintaining the efficient operation of the drying device.
[0033] The brush rod 8022, which has a brush head 8021, is equipped with micro-air holes. A micro-air storage chamber 806 is located at the end of the brush rod 8022 furthest from the servo motor 804. The micro-air storage chamber 806 contains a piezoelectric ceramic micro-pump and a micro-proportional valve, which work together to supply air. An external air pump is connected to the micro-air storage chamber 806. Through this design, during the drying process, some materials, due to their high viscosity or hardening after drying, stubbornly adhere to the brush head 8021, the inner wall of the drying drum 8, or the spiral blades 801. Under the action of the piezoelectric ceramic micro-pump and the micro-proportional valve, the micro-air holes spray high-pressure gas from the micro-air storage chamber 806 into the telescopic drive shaft 803. The gas in the telescopic drive shaft 803 enters the brush rod 8022 and is ejected from the micro-air holes, generating a strong impact force on the adhered materials, cleaning the brush head 8021, and simultaneously blowing off stubborn materials that are difficult to clean directly from the inner wall of the drying drum 8. This significantly improves the cleaning effect and ensures the cleanliness of the drying device's interior.
[0034] The aforementioned drying drum 8 is covered with a sealed outer shell 2, and the bottom of the sealed outer shell 2 is provided with a gas conveying space 6. Through the above scheme, the sealed outer shell 2 isolates the drying drum 8 from the external environment, forming a relatively closed space, which effectively reduces the heat loss during the drying process. More heat is retained inside the sealed outer shell 2 to heat the drying drum 8 and the materials inside, thereby reducing energy consumption, improving heat utilization, and saving drying costs.
[0035] The gas conveying space 6 is equipped with two partitions 10, and the conveying pipe 9 is equipped with three electric valves 7. The conveying pipe 9 is equipped with several air holes, which are located on the right side of the electric valves 7. Through the above scheme, the partitions 10 divide the gas conveying space 6 into three areas, and the airflow in each area can be controlled. The material characteristics and drying progress of different areas may be different. By adjusting the opening of the electric valves 7 in each area individually, the airflow rate and airflow speed entering each area can be precisely controlled, so that the hot air is more rationally distributed to different areas, meeting the drying needs of materials at different drying stages and locations, and improving drying efficiency.
[0036] The aforementioned return pipe 4 is located on the outer wall of the sealed shell 2. A sealed channel connected to the return pipe 4 is located above the sealed shell 2. Through the above scheme, during the drying process, the sealed shell 2 will be filled with exhaust gas carrying a large amount of heat. The return pipe 4 is located on the outer wall of the sealed shell 2, and the sealed channel is located above and connected to it, so that the exhaust gas naturally rises into the sealed channel and is then smoothly discharged through the return pipe 4. The heat in the exhaust gas is effectively recovered, reducing the direct loss of heat to the external environment, improving energy utilization, and reducing drying costs.
[0037] Working principle:
[0038] The feeding device feeds the wet material into the drying drum 8 with spiral blades 801. The spiral blades 801 generate axial thrust when the drum rotates, causing the material to move forward evenly. The fixed baffles 805 welded on the spiral blades 801 change the material's movement trajectory and extend the residence time, ensuring that the material is fully in contact with the hot air.
[0039] The heat exchanger 3 generates a high-temperature airflow, which enters the gas conveying space 6 at the bottom of the sealed shell 2 through the conveying pipe 9. The partition 10 divides the gas conveying space 6 into three zones, and the electric valve 7 is used to achieve zoned temperature control. The hot air passes through the air hole and ventilation mesh into the drum. After contacting the material in the opposite direction, the waste gas carrying moisture returns to the heat exchanger 3 through the upper return pipe 4, forming a closed-loop heat recovery system.
[0040] Servo motor 804 drives telescopic transmission shaft 803 to rotate brush 802 in the opposite direction at low speed. At the same time, servo motor 804 drives lead screw mechanism to extend and retract telescopic transmission shaft 803. The brush head 8021 scrapes off the adhering material to prevent the material from clumping. The micro air holes of brush rod 8022 spray nitrogen gas under the control of piezoelectric ceramic micro pump and micro proportional valve, which, combined with mechanical scraping, achieves dual cleaning.
[0041] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A continuous drying apparatus, comprising: The device comprises a feeding device (1), a drying drum (8) connected to the feeding device (1), a discharging device (5) connected to one end of the drying drum (8), a heat exchanger (3) located above the drying drum (8), a conveying pipe (9) connected to the heat exchanger (3) and located below the drum (8), a return pipe (4) connected to the heat exchanger (3) and located above the drying drum, and ventilation mesh holes on the surface of the drying drum (8); characterized in that it further comprises a telescopic drive shaft (803) located inside the drying drum (8), a servo motor (804) connected to one end of the telescopic drive shaft (803), and several brushes (802) fixed on the telescopic drive shaft (803).
2. The continuous drying apparatus according to claim 1, characterized in that, The inner wall of the drying drum (8) is welded with several spiral blades (801).
3. The continuous drying apparatus according to claim 2, characterized in that, The outer edge of the spiral blade (801) is vertically welded with two fixed baffles (805), which are circular in structure.
4. The continuous drying apparatus according to claim 2, characterized in that, The spiral blade (801) rotates in the opposite direction to the brush (802).
5. The continuous drying apparatus according to claim 2, characterized in that, The brush (802) is provided with a brush rod (8022), one end of which is fixedly connected to the telescopic transmission shaft (803). The brush rod (8022) is provided with a plurality of brush heads (8021) at one end, and the length of the brush head (8021) is longer than the width of the spiral blade (801).
6. The continuous drying apparatus according to claim 5, characterized in that, The brush rod (8022) with the brush head (8021) at one end is provided with a micro air hole, and the end of the brush rod (8022) away from the servo motor (804) is provided with a micro air storage chamber (806).
7. The continuous drying apparatus according to claim 1, characterized in that, The drying drum (8) is covered with a sealed outer shell (2), and the bottom of the sealed outer shell (2) is provided with a gas conveying space (6).
8. The continuous drying apparatus according to claim 7, characterized in that, The gas delivery space (6) is provided with two partitions (10), the delivery pipe (9) is provided with three electric valves (7), and the delivery pipe (9) is provided with several air holes, which are located on the right side of the electric valves (7).
9. The continuous drying apparatus according to claim 7, characterized in that, The return pipe (4) is located on the outer wall of the sealed shell (2), and a sealed channel connected to the return pipe (4) is provided above the sealed shell (2).