An automatic drying apparatus

Abstract

The utility model belongs to the technical field of parts drying, disclose a kind of automatic drying equipment, including drying chamber, transmission mechanism, heat cycle mechanism and control platform, so that workpiece can automatically enter and exit drying chamber without relying on manual handling, realize full-process automation conveying;Reduce labor intensity, improve operation safety.Workpiece keeps closed in drying process Box, can effectively stabilize cavity temperature, reduce hot air loss.After the closing of box door, control platform starts heat cycle mechanism and carries out drying to workpiece surface paint;Through the forced convection mode formed by bottom air supply and top return air cooperation circulation fan, heat transfer can be more quickly and more efficiently realized;The air outlet end of two blow pipes is relatively arranged, forms left-right symmetry, stable airflow field, enhances the circulation path of airflow in up-down direction, improves air flow rate and convection heat transfer efficiency, significantly improves drying effect, shortens drying time and reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of parts drying technology, and in particular to an automatic drying device. Background Technology

[0002] After maintenance, components such as traction motor hangers, traction beams, mounting plates, and stops on high-speed trains often require touch-up painting to prevent oxidation and corrosion of the metal surfaces and improve protective performance. If the painted parts are left to dry naturally at room temperature, it typically takes several hours or even a whole day to fully cure, significantly extending the maintenance cycle and slowing down the return of the entire train to the depot. Using drying equipment can raise the temperature in a shorter time, accelerating the evaporation and curing of the paint solvent, and greatly reducing the waiting time.

[0003] Existing drying equipment generally uses manual methods to push the workpieces into the drying chamber. Hot air is blown vertically downwards from the top of the chamber, flowing unidirectionally from top to bottom. After passing through the workpieces, it is discharged directly from the bottom. Due to the low density of hot air, it tends to accumulate in the upper part of the drying chamber, creating a significant temperature gradient between the upper and lower parts of the chamber. This results in faster drying of the paint on the upper surface of the workpiece, while the paint on the lower surface dries slowly, leading to uneven drying and defects such as dry tops and wet bottoms, or localized whitening. Furthermore, the direct discharge of hot air after vertical flow does not create an effective circulation path within the chamber, resulting in low convective heat transfer efficiency, slow overall heating of the drying chamber, low energy utilization, and high energy consumption. Simultaneously, in the vertical flow field, the conveyor table can easily obstruct the airflow, reducing wind speed and heat exchange in some areas, causing incomplete drying in certain areas. Moreover, the manual pushing structure requires the drying door to be kept open for extended periods during loading and unloading, leading to significant heat loss. Additionally, operators must work in a high-temperature environment, posing problems such as high labor intensity and safety hazards. Utility Model Content

[0004] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide an automatic drying device capable of automatically loading and unloading workpieces and efficiently drying their surface paint, ensuring uniform heating and thorough drying, effectively improving convective heat transfer efficiency, shortening the overall heating time of the drying chamber, increasing thermal energy utilization, and reducing energy consumption, thereby achieving efficient, safe, and energy-saving drying operations.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An automatic drying device, comprising:

[0007] The drying chamber includes a box body and a door. The box body has a loading port and a unloading port at both ends along its length. The box body is provided with a door that can be automatically opened or closed in conjunction with the loading port and the unloading port, so as to realize the switching between a closed state and a connected state of the box body.

[0008] The transmission mechanism includes a feeding component, a conveyor line component, and a discharging component. The conveyor line component is disposed inside the box along the length of the box, and its feeding end and discharging end correspond one-to-one with the feeding port and the discharging port, respectively. The feeding component and the discharging component are disposed outside the box and correspond one-to-one with the feeding port and the discharging port, respectively.

[0009] The heat circulation mechanism includes a blower duct, a return air duct, and a circulating heating component. The outlet end of the blower duct is located inside the housing and is positioned opposite each other at the bottom of the two side walls in the width direction of the housing. The inlet end of the return air duct is located at the top of the housing. The circulating heating component connects the blower duct and the return air duct, and is used to initially heat the air during the start-up phase and send it into the housing through the blower duct. During operation, it reheats the air entering from the return air duct and sends the heated air back into the housing through the blower duct, forming a continuous hot air circulation.

[0010] The control platform is electrically connected to the drying chamber, the transmission mechanism, and the heat circulation mechanism.

[0011] In some optional embodiments, the conveyor assembly includes a single-layer conveyor and a double-layer conveyor, which are arranged side by side along the width direction of the housing; the feeding assembly includes a feeding platform one and a feeding platform two, which correspond to the feeding end of the single-layer conveyor and the feeding end of the double-layer conveyor, respectively; the unloading assembly includes an unloading platform one and an unloading platform two, which correspond to the unloading end of the single-layer conveyor and the unloading end of the double-layer conveyor, respectively.

[0012] The double-layer conveyor line consists of an upper conveyor line and a lower conveyor line, which are stacked along the height of the box. The upper conveyor line is located at the middle height of the loading port and is used to convey small workpieces. The single-layer conveyor line is used to convey large workpieces.

[0013] In some alternative embodiments, the transmission mechanism further includes at least two lifting platform assemblies, each capable of lifting and lowering along the height of the box, located at the loading end and unloading end of the double-layer conveyor line. The lifting platform assembly located at the loading end of the double-layer conveyor line can transport the small workpiece from the loading platform two to the double-layer conveyor line, and the lifting platform assembly located at the unloading end of the double-layer conveyor line can unload the dried small workpiece from the double-layer conveyor line to the unloading platform two.

[0014] In some alternative embodiments, the lifting platform assembly includes a lifting drive and a lifting platform. The lifting platform is disposed between the second loading platform and the double-layer conveyor line or between the second unloading platform and the double-layer conveyor line. The output end of the lifting drive is connected to the lifting platform to drive the lifting platform to reciprocate between the upper conveyor line and the lower conveyor line along the height direction of the box.

[0015] In some optional embodiments, the single-layer conveyor line, the upper conveyor line and the lower conveyor line of the double-layer conveyor line are each provided with multiple drying positions, and the multiple drying positions are arranged at intervals along the length direction of the box; each drying position has a ventilation hole at its bottom.

[0016] In some alternative embodiments, multiple air blowing ducts are spaced apart along the length of the housing, and the height of the air outlet end of the air blowing duct is slightly lower than the height of the single-layer conveyor line and the lower conveyor line; multiple air inlet ends of the return air ducts are spaced apart along the length of the housing.

[0017] In some alternative embodiments, the circulating heating assembly includes a heater and a circulating fan. The air inlet of the circulating fan is connected to the return air duct, and its air outlet is connected to the air inlet of the heater. The air outlet of the heater is connected to the blowing duct, which is used to heat the air transported by the circulating fan. Both the blowing duct and the return air duct are made of galvanized steel sheet.

[0018] In some alternative embodiments, the drying chamber further includes a door drive component, the door being slidably connected to the chamber body, and the output end of the door drive component being connected to the door for driving the door to slide relative to the chamber body to open or close the loading port and the unloading port.

[0019] In some alternative embodiments, the door and the box body are slidably connected by a guide rail, which is arranged along the height direction or the width direction of the box body on one side of the loading port and the unloading port.

[0020] In some alternative embodiments, an access door is provided on one side of the enclosure along its length.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides an automatic drying device, including a drying chamber, a conveying mechanism, a thermal circulation mechanism, and a control platform. Through the cooperation of the conveying mechanism with the loading and unloading ports on the chamber, workpieces can automatically enter and exit the drying chamber without manual handling, achieving fully automated conveying throughout the process. This ensures continuous and stable workpiece conveying, reducing labor intensity and improving operational safety. Simultaneously, the chamber remains sealed during the drying process, effectively stabilizing the chamber temperature and reducing hot air loss. The conveyor assembly not only transports workpieces but also serves as a drying station; its conveying speed is adjustable, thereby controlling the dwell time and position of workpieces within the chamber, ensuring each workpiece is within the hot air circulation field and guaranteeing uniform heating. After the chamber door is closed, the control platform activates the heat circulation mechanism to dry the paint on the workpiece surface. Forced convection, achieved through bottom air supply and top return air combined with a circulating fan, transfers heat more quickly and efficiently than natural convection. The opposing air outlets of the two blowing ducts simultaneously and evenly deliver hot air into the chamber from both sides of its width, creating a symmetrical and stable airflow field. This enhances the vertical circulation path of the airflow, increasing air velocity and convective heat transfer efficiency. Furthermore, it improves the uniformity of workpiece heating, enhances the overall temperature consistency of the drying chamber, and effectively reduces temperature dead zones and airflow blind spots within the chamber, thereby significantly improving drying performance, shortening drying time, and reducing energy consumption. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the automatic drying equipment in this utility model;

[0024] Figure 2 This is a schematic diagram of the transmission mechanism in this utility model;

[0025] Figure 3 This is a schematic diagram of the drying chamber and heat circulation mechanism in this utility model;

[0026] Figure 4 This is a side view of the automatic drying equipment in this utility model;

[0027] Figure 5 yes Figure 4 Sectional view at point AA.

[0028] In the picture:

[0029] 1. Drying chamber; 11. Chamber body; 12. Chamber door; 13. Feeding port; 14. Inspection door; 15. Column;

[0030] 2. Conveying mechanism; 21. Feeding assembly; 211. Feeding platform one; 212. Feeding platform two; 22. Conveyor line assembly; 221. Single-layer conveyor line; 222. Double-layer conveyor line; 2221. Upper conveyor line; 2222. Lower conveyor line; 23. Unloading assembly; 231. Unloading platform one; 232. Unloading platform two; 24. Lifting platform;

[0031] 3. Heat circulation mechanism; 31. Air blowing duct; 311. Air outlet; 32. Return air duct; 321. Air inlet; 33. Circulating heating component;

[0032] 4. Control platform. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0035] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For example, a direct connection refers to two parts or components being connected together without an intermediate component, while an indirect connection refers to two parts or components each being connected to at least one intermediate component, with the connection achieved through the intermediate component. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0037] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0038] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0039] In this utility model, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" of another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" of the first feature and the second feature include the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0040] Please refer to Figures 1 to 5As shown, this embodiment provides an automatic drying device, including a drying chamber 1, a conveying mechanism 2, a heat circulation mechanism 3, and a control platform 4. The drying chamber 1 includes a housing 11 and a door 12. The housing 11 has a loading port 13 and a discharging port at its two ends along its length. The housing 11 is equipped with a door 12 that can automatically open or close, cooperating with the loading port 13 and the discharging port, to switch the housing 11 between a closed state and a connected state. The conveying mechanism 2 includes a loading component 21, a conveyor line component 22, and a discharging component 23. The conveyor line component 22 is arranged inside the housing 11 along its length, with its loading end and discharging end corresponding one-to-one with the loading port 13 and the discharging port, respectively. The loading component 21 and the discharging component 23 are respectively located outside the housing 11 and respectively connect to… The loading port 13 and unloading port are located in a one-to-one correspondence; the heat circulation mechanism 3 includes a blowing duct 31, a return air duct 32 and a circulating heating component 33. The air outlet 311 of the blowing duct 31 is located inside the housing 11 and is located at the bottom of the two side walls in the width direction of the housing 11. The air inlet 321 of the return air duct 32 is located at the top inside the housing 11. The circulating heating component 33 connects the blowing duct 31 and the return air duct 32. It is used to initially heat the air during the start-up phase and send it into the housing 11 through the blowing duct 31. During operation, it reheats the air entering from the return air duct 32 and sends the heated hot air back into the housing 11 through the blowing duct 31 to form a continuous hot air circulation. The control platform 4 is electrically connected to the drying chamber 1, the transmission mechanism 2 and the heat circulation mechanism 3.

[0041] Through the cooperation of the conveying mechanism 2 with the loading port 13 and unloading port on the chamber 11, the control platform 4 controls the chamber door 12 to be open during the loading process. The workpiece to be dried can be automatically conveyed by the loading component 21 and enter the chamber 11 through the loading port 13, and then conveyed to the conveyor assembly 22 for positioning. After the workpiece is in place, the control platform 4 controls the chamber door 12 to automatically close, entering the sealed drying stage. After drying is completed, the chamber door 12 is opened again, so that the dried workpiece is automatically unloaded to the unloading component 23. This design allows the workpiece to automatically enter and exit the drying chamber 1 without relying on manual handling, realizing fully automated conveying. It makes the workpiece conveying continuous and stable, reducing labor intensity and improving operational safety. At the same time, the chamber 11 remains sealed during the drying process, which can effectively stabilize the chamber temperature and reduce the loss of hot air. The conveyor assembly 22 can not only transport the workpiece, but also serve as the workpiece drying station. Its conveying speed is adjustable, thereby controlling the residence time and position of the workpiece in the chamber 11, so that each workpiece is in the hot air circulation field and ensures that it is heated evenly.

[0042] Upon entering the sealed drying stage, the control platform 4 activates the thermal circulation mechanism 3. Operators can set the drying temperature and drying time parameters through the control platform 4 and dry the paint on the workpiece surface. In the initial stage of operation, the circulating heating component 33 initially heats the air and sends the heated air evenly into the interior of the chamber 11 from the bottom through the air outlet 311 of the air blowing pipes 31 located at the bottom of the two side walls in the width direction of the chamber 11, so that the interior of the chamber 11 quickly heats up to the set temperature. The hot air flows upward along the surface of the workpiece, drying the workpiece surface while transferring heat. After the air rises to the top, it is collected by the air inlet 321 of the return air pipe 32 and sent back to the circulating heating component 33 for secondary heating to compensate for the heat loss during the circulation process and maintain the stability of the temperature inside the chamber 11. The heated air is sent back in through the air blowing pipe 31, so that the entire interior of the chamber 11 forms a continuous and stable convection circulation.

[0043] The forced convection method formed by bottom air supply and top return air in conjunction with the circulating fan can achieve heat transfer faster and more efficiently than natural convection. By setting the air outlets 311 of the two blowing ducts 31 opposite each other, hot air is simultaneously and evenly sent into the interior of the chamber 11 from both sides in the width direction, thereby forming a symmetrical and stable airflow field, enhancing the circulation path of the airflow in the vertical direction, and improving the air velocity and convective heat transfer efficiency. This further improves the uniformity of workpiece heating, improves the overall temperature consistency of the drying chamber 1, and effectively reduces temperature dead zones and airflow blind spots inside the chamber 11, thereby significantly improving the drying effect, shortening the drying time and reducing energy consumption.

[0044] It should be noted that the control platform 4 may be, but is not limited to, using a PLC control platform 4. The PLC control platform 4 is existing technology and will not be described in detail here.

[0045] Specifically, the drying chamber 1 also includes a door drive unit. The door 12 is slidably connected to the chamber body 11, and the output end of the door drive unit is connected to the door 12 to drive the door 12 to slide relative to the chamber body 11, thereby opening or closing the loading port 13 and the unloading port. The loading port 13 and the unloading port serve as channels for workpieces to enter and exit the drying chamber 1. Each door 12 can be linked with the control platform 4 to achieve timed and synchronous opening and closing, replacing manual operation, avoiding direct contact between operators and the high-temperature drying chamber 1, and improving operational safety and production efficiency. The door 12 enables closed-loop operation of automatic workpiece loading and unloading, while maintaining the chamber body 11 sealed during the drying process to prevent hot air leakage and improve temperature uniformity and heat energy utilization within the drying chamber 1. The size of the door 12 is not smaller than the size of the loading port 13 and the unloading port, so as to fully cover them.

[0046] More specifically, the door 12 is slidably connected to the box body 11 via guide rails. The guide rails are positioned along the height or width of the box body 11 on one side of the loading port 13 and the unloading port, respectively. The door 12 can open and close smoothly and steadily along the fixed rails, preventing shaking or tilting and improving sliding accuracy and sealing performance. Simultaneously, the guide rails ensure a reliable seal between the door 12 and the box body 11, preventing hot air leakage from the drying chamber 1, thereby improving temperature uniformity and heat utilization in the drying chamber 1, and enhancing workpiece drying quality and production safety. Specifically, when the guide rails are positioned along the height of the box body 11, the door 12 can automatically rise and fall along the height of the box body 11; when the guide rails are positioned along the width of the box body 11, the door 12 can automatically open and close in the left-right direction of the box body 11. The specific opening and closing method is not specifically limited here.

[0047] In other embodiments, the door 12 may also be an automatically lifting roller shutter door, which is not specifically limited here.

[0048] like Figure 5 As shown, in some optional embodiments, multiple columns 15 are arranged inside the box 11 along its height direction to stably support the box 11. Specifically, the multiple columns 15 can be spaced apart along the length direction of the box 11 and are all located at the center position in the width direction of the box 11, so that the columns 15 form a longitudinal skeleton inside the box 11, which can effectively improve the bending and compressive resistance of the box 11 and reduce the deformation of the box 11 caused by thermal stress or internal wind pressure during high-temperature drying.

[0049] like Figure 2As shown, due to the differences in the size of the workpieces to be dried, in order to improve the space utilization and drying efficiency of the box 11, in some embodiments, the conveyor assembly 22 includes a single-layer conveyor 221 and a double-layer conveyor 222, which are arranged side by side along the width direction of the box 11; the loading assembly 21 includes a loading platform 1 211 and a loading platform 212, which correspond to the loading end of the single-layer conveyor 221 and the loading end of the double-layer conveyor 222, respectively; the unloading assembly 23 includes an unloading platform 1 231 and an unloading platform 232, which correspond to the unloading end of the single-layer conveyor 221 and the unloading end of the double-layer conveyor 222, respectively; among them, since large workpieces have the characteristics of large volume and heavy weight, they require greater vertical clearance and higher load-bearing capacity. Therefore, an independent single-layer conveyor 221 is set up to ensure the stability of the large workpiece transportation channel and avoid interference with other workpieces. Because small workpieces are small in size and light in weight, the double-layer conveyor line 222 can construct two conveying paths within the limited height of the box 11, thus multiplying the conveying capacity of small workpieces and realizing three-dimensional utilization of space. This significantly improves the transportation and drying efficiency per unit volume of the box 11. Furthermore, the single-layer conveyor line 221 and the double-layer conveyor line 222 correspond to independent loading and unloading platforms, ensuring that the loading and unloading processes of workpieces of different sizes do not interfere with each other. This avoids blockages, waiting, or rhythm conflicts during loading or unloading, resulting in a smoother and more controllable overall conveying rhythm. Through the coordinated operation of single-layer and double-layer conveyors, the drying chamber 1 can simultaneously process large and small workpieces within the same working cycle, achieving parallel drying of workpiece types and further improving drying efficiency.

[0050] Specifically, the single-layer conveyor line 221 includes a drive motor, multiple conveyor rollers, and roller supports. The multiple conveyor rollers are arranged side by side in parallel along the conveying direction of the single-layer conveyor line 221. The multiple conveyor rollers include drive rollers and multiple driven rollers. The output end of the drive motor is connected to the drive rollers. The drive rollers and driven conveyor rollers are linked by a chain or synchronous belt, so that the multiple conveyor rollers rotate synchronously, thereby driving the large workpiece to move continuously along the conveying direction.

[0051] The double-layer conveyor line 222 includes an upper conveyor line 2221 and a lower conveyor line 2222. Its structure is similar to that of the single-layer conveyor line 221, also including a drive motor, multiple conveyor rollers, and roller supports. The upper conveyor line 2221 and the lower conveyor line 2222 are stacked along the height direction of the housing 11. The upper conveyor line 2221 is used for the upper channel of conveying small workpieces, and the lower conveyor line 2222 is used for the lower channel of conveying small workpieces. The drive motor of the double-layer conveyor line 222 drives the driven rollers to rotate synchronously through the drive rollers, achieving stable synchronous operation of the upper and lower conveyor rollers, thereby ensuring continuous and stable conveying of small workpieces on the double-layer conveyor line 222.

[0052] Since the double-layer conveyor line 222 has two different conveying heights in the height direction of the housing 11, in order to facilitate the loading and unloading of the double-layer conveyor line 222, in some embodiments, the conveying mechanism 2 also includes at least two lifting platform assemblies, both of which can be lifted and lowered along the height direction of the housing 11, located at the loading end and unloading end of the double-layer conveyor line 222 respectively. The lifting platform assembly located at the loading end of the double-layer conveyor line 222 can transport small workpieces from the loading platform 212 to the double-layer conveyor line 222, and the lifting platform assembly located at the unloading end of the double-layer conveyor line 222 can transport dried small workpieces... The workpiece is unloaded from the double-layer conveyor line 222 to the unloading platform 232. The lifting platform assembly is used to compensate for the height difference between the upper conveyor line 2221 and the lower conveyor line 2222 in the double-layer conveyor line 222. During the loading stage of the double-layer conveyor line 222, small workpieces are introduced into the corresponding conveyor layer from the loading platform 212. During the unloading stage, the dried small workpieces are exported from the double-layer conveyor line 222 to the unloading platform 232, ensuring that the small workpieces can be smoothly switched between different height conveying paths, realizing automated loading and unloading and multi-layer three-dimensional conveying, improving the space utilization of the equipment and the overall conveying efficiency.

[0053] like Figure 1 and Figure 4 As shown, specifically, the lifting platform assembly includes a lifting drive and a lifting platform 24. The lifting platform 24 is positioned between the loading platform 212 and the double-layer conveyor line 222, or between the unloading platform 232 and the double-layer conveyor line 222. The output end of the lifting drive is connected to the lifting platform 24 to drive the lifting platform 24 to reciprocate between the upper conveyor line 2221 and the lower conveyor line 2222 along the height direction of the housing 11. The lifting drive can precisely control the position of the lifting platform 24 between the two conveyor layer heights, ensuring that small workpieces maintain the same height as the corresponding conveyor layer when entering or exiting the double-layer conveyor line 222. The lifting platform 24 remains horizontal during the lifting process, ensuring that small workpieces maintain a stable posture when transferred to the conveyor line, preventing slippage or misalignment and improving transfer accuracy. It is understood that the lifting drive can, but is not limited to, using a hydraulic cylinder; no specific limitation is made here. The lifting drive is electrically connected to the control platform 4, and the operator controls the lifting platform 24 to move up and down through the control platform 4.

[0054] In some optional embodiments, multiple drying positions are provided on the upper conveyor line 2221 and lower conveyor line 2222 of the single-layer conveyor line 221 and the double-layer conveyor line 222, and the multiple drying positions are arranged at intervals along the length of the box 11; each drying position has a ventilation hole at the bottom; the ventilation hole allows hot air to flow directly from the bottom of the drying position through the workpiece, so that the hot air can evenly coat the surface of the workpiece, and form a continuous air circulation between the upper conveyor line 2221, the lower conveyor line 2222 and the single-layer conveyor line 221, which enhances the convective heat transfer efficiency, makes the temperature distribution in the box 11 more uniform, accelerates the overall heating rate, avoids insufficient local temperature, and improves the drying uniformity of the workpiece surface. The drying positions may, but are not limited to, use trays.

[0055] Specifically, the single-layer conveyor line 221 can be equipped with no fewer than 6 drying stations, and the lower conveyor line 2222 and the upper conveyor line 2221 of the double-layer conveyor line 222 can each be equipped with no fewer than 5 drying stations. During the loading process, the workpieces are transported one by one to the single-layer conveyor line 221 and the double-layer conveyor line 222. When the workpieces fill multiple drying stations on each conveyor line, the control platform 4 drives the door 12 to close automatically and starts the circulating heating component 33, so that a stable hot air circulation environment is formed in the drying chamber 1, and the workpieces located on the single-layer conveyor line 221 and the double-layer conveyor line 222 are dried simultaneously, effectively improving the drying efficiency.

[0056] To ensure uniform distribution of hot air within the chamber 11, in some embodiments, multiple air-blowing ducts 31 are spaced apart along the length of the chamber 11. The height of the air outlet 311 of the air-blowing duct 31 is slightly lower than the height of the single-layer conveyor line 221 and the lower conveyor line 2222. Multiple air inlet ducts 321 are spaced apart along the length of the chamber 11. The arrangement of multiple air outlet ducts 311 along the length of the chamber 11 makes the distribution of hot air more uniform, resulting in a more uniform temperature throughout the chamber 11. The air outlet ducts 311 are lower than the height of each conveyor line, allowing hot air to envelop the workpiece from below or diagonally upwards, enhancing the heat convection effect on the bottom and sides of the workpiece, reducing drying dead zones, and improving convection heat transfer efficiency. The air inlet 321 of the multi-point return air duct 32 collects the hot air rising from the top of the box 11 evenly, forming a stable and continuous circulating air field, so that the hot air circulates more fully in the drying chamber 1, improving the overall heating speed and heat energy utilization rate, ensuring drying uniformity, and reducing energy consumption.

[0057] Specifically, the circulating heating component 33 includes a heater and a circulating fan. The air inlet 321 of the circulating fan is connected to the return air duct 32, and its air outlet 311 is connected to the air inlet 321 of the heater. The air outlet 311 of the heater is connected to the blowing duct 31, which is used to heat the air transported by the circulating fan. The circulating fan drives the air to circulate in the housing 11, and the heater heats the circulating air. The above connection method forms a stable and continuous air circulation, reducing heat loss. Both the blowing duct 31 and the return air duct 32 are made of galvanized steel plate. Galvanized steel plate has good corrosion resistance, high temperature resistance and mechanical strength, ensuring that the pipe does not deform under high temperature for a long time, improving the service life of the pipe and reducing maintenance costs.

[0058] Combination Figure 3 He Ru Figure 5 As shown, the circulating heating component 33, the blowing duct 31, and the return air duct 32 are further disposed on the outside of the housing 11. The air outlet 311 of the blowing duct 31 penetrates through the side wall of the housing 11 and is sealed to the side wall of the housing 11. The air inlet 321 of the return air duct 32 penetrates through the top of the housing 11 and is sealed to the top wall of the housing 11. Through the above design, the internal space of the housing 11 is effectively avoided, facilitating maintenance and repair. At the same time, the blowing duct 31 and the return air duct 32 are sealed to the housing 11, ensuring that hot air does not leak when entering the drying chamber 1 from the duct, forming a complete air circulation path.

[0059] like Figure 4 As shown, in some alternative embodiments, an inspection door 14 is provided on one side of the housing 11 along its length, providing a direct access to the interior of the drying chamber 1, so that operators can easily inspect, clean or repair the internal components of the housing 11.

[0060] This embodiment also provides an automatic drying method, using the automatic drying equipment in any of the above embodiments, including the following steps:

[0061] S1: The control platform 4 controls the door 12 to open the loading port 13, and the loading component 21 sequentially transports the workpieces to be dried to the conveyor assembly 22 inside the box 11 in batches; after the loading is completed, the control platform 4 controls the door 12 to close, so that the box 11 returns to a sealed state.

[0062] S2: The control platform 4 starts the heat circulation mechanism 3 to carry out the sealed drying stage. The drying temperature and drying time are set by the control platform 4, and the air is initially heated by the circulating heating component 33. The heated hot air is evenly sent into the chamber 11 through the air outlet 311 of the blowing pipe 31 to dry the workpiece. The air inlet 321 of the return air pipe 32 at the top of the chamber 11 recovers the heated air and sends it back to the circulating heating component 33 for secondary heating, forming a continuous hot air circulation.

[0063] S3: After the closed drying stage is completed, the control platform 4 controls the door 12 to open the unloading port, so that the dried workpiece is automatically unloaded into the unloading assembly 23; after the unloading process is completed, the control platform 4 controls the door 12 to close automatically, so that the box 11 is closed again.

[0064] S4: Repeat steps S1 to S3 according to production needs to achieve continuous drying operation.

[0065] The feeding, drying, and unloading operations of this method are all automatically coordinated by the control platform 4. The workpieces continuously circulate inside the equipment, avoiding tedious operations such as manually opening and closing the box door 12 and manual transfer, thus improving the overall work efficiency. Furthermore, the feeding and unloading processes are all carried out under the precise control of the box door 12. During the closed drying stage, the box 11 remains sealed, which helps to maintain constant temperature and humidity conditions and prevents external cold air from entering and causing temperature fluctuations, thereby ensuring a stable and consistent drying effect. The forced convection method formed by bottom air supply and top return air in conjunction with the circulating fan can achieve heat transfer faster and more efficiently than natural convection. By setting the air outlets 311 of the two blowing ducts 31 opposite each other, hot air is simultaneously and evenly sent into the interior of the chamber 11 from both sides in the width direction, thereby forming a symmetrical and stable airflow field, enhancing the circulation path of the airflow in the vertical direction, and improving the air velocity and convective heat transfer efficiency. This further improves the uniformity of workpiece heating, improves the overall temperature consistency of the drying chamber 1, and effectively reduces temperature dead zones and airflow blind spots inside the chamber 11, thereby significantly improving the drying effect, shortening the drying time and reducing energy consumption.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automatic drying device, characterized in that, include: The drying chamber (1) includes a box body (11) and a box door (12). The box body (11) has a feeding port (13) and a discharging port at both ends along its length. The box body (11) is provided with a box door (12) that can be automatically opened or closed in conjunction with the feeding port (13) and the discharging port, so as to realize the switching of the box body (11) between a closed state and a connected state. The transmission mechanism (2) includes a feeding component (21), a conveyor line component (22) and a discharging component (23). The conveyor line component (22) is arranged inside the box (11) along the length direction of the box (11), and its feeding end and discharging end correspond one-to-one with the feeding port (13) and the discharging port, respectively. The feeding component (21) and the discharging component (23) are respectively arranged outside the box (11), and correspond one-to-one with the feeding port (13) and the discharging port, respectively. The heat circulation mechanism (3) includes a blower duct (31), a return air duct (32), and a circulating heating component (33). The air outlet (311) of the blower duct (31) is located inside the housing (11) and is located at the bottom of the two side walls of the housing (11) in the width direction. The air inlet (321) of the return air duct (32) is located at the top inside the housing (11). The circulating heating component (33) connects the blower duct (31) and the return air duct (32) and is used to initially heat the air during the start-up phase and send it into the housing (11) through the blower duct (31). During operation, it reheats the air entering from the return air duct (32) and sends the heated air back into the housing (11) through the blower duct (31) to form a continuous hot air circulation. The control platform (4) is electrically connected to the drying chamber (1), the transmission mechanism (2) and the heat circulation mechanism (3).

2. The automatic drying equipment according to claim 1, characterized in that, The conveyor assembly (22) includes a single-layer conveyor (221) and a double-layer conveyor (222), which are arranged side by side along the width direction of the box (11); the loading assembly (21) includes a loading platform one (211) and a loading platform two (212), which correspond to the loading end of the single-layer conveyor (221) and the loading end of the double-layer conveyor (222), respectively; the unloading assembly (23) includes an unloading platform one (231) and an unloading platform two (232), which correspond to the unloading end of the single-layer conveyor (221) and the unloading end of the double-layer conveyor (222), respectively. The double-layer conveyor line (222) is divided into an upper conveyor line (2221) and a lower conveyor line (2222), which are stacked along the height direction of the box (11). The upper conveyor line (2221) is located at the middle height position of the loading port (13) and is used to convey small workpieces. The single-layer conveyor line (221) is used to convey large workpieces.

3. The automatic drying equipment according to claim 2, characterized in that, The transmission mechanism (2) further includes at least two lifting platform components, both of which are capable of lifting and lowering along the height direction of the box (11) and located at the loading end and unloading end of the double-layer conveyor line (222). The lifting platform component located at the loading end of the double-layer conveyor line (222) can transport the small workpiece from the loading platform two (212) to the double-layer conveyor line (222), and the lifting platform component located at the unloading end of the double-layer conveyor line (222) can unload the dried small workpiece from the double-layer conveyor line (222) to the unloading platform two (232).

4. The automatic drying equipment according to claim 3, characterized in that, The lifting platform assembly includes a lifting drive and a lifting platform (24). The lifting platform (24) is located between the upper loading platform (212) and the double-layer conveyor line (222) or between the lower loading platform (232) and the double-layer conveyor line (222). The output end of the lifting drive is connected to the lifting platform (24) to drive the lifting platform (24) to reciprocate between the upper conveyor line (2221) and the lower conveyor line (2222) along the height direction of the box (11).

5. The automatic drying equipment according to claim 4, characterized in that, The single-layer conveyor line (221) and the double-layer conveyor line (222) are provided with multiple drying positions on the upper conveyor line (2221) and the lower conveyor line (2222), and the multiple drying positions are arranged at intervals along the length direction of the box (11); each drying position has a ventilation hole at the bottom.

6. The automatic drying equipment according to claim 2, characterized in that, Multiple air blowing ducts (31) are arranged at intervals along the length of the housing (11). The height of the air outlet (311) of the air blowing duct (31) is slightly lower than the height of the single-layer conveyor line (221) and the lower conveyor line (2222). Multiple air inlet (321) of the return air duct (32) are arranged at intervals along the length of the housing (11).

7. The automatic drying equipment according to claim 6, characterized in that, The circulating heating assembly (33) includes a heater and a circulating fan. The air inlet (321) of the circulating fan is connected to the return air duct (32), and its air outlet (311) is connected to the air inlet (321) of the heater. The air outlet (311) of the heater is connected to the blowing duct (31), which is used to heat the air transported by the circulating fan. Both the blowing duct (31) and the return air duct (32) are made of galvanized steel plate.

8. The automatic drying equipment according to claim 1, characterized in that, The drying chamber (1) also includes a door drive component. The door (12) is slidably connected to the box body (11). The output end of the door drive component is connected to the door (12) and is used to drive the door (12) to slide relative to the box body (11) to open or close the loading port (13) and the unloading port.

9. The automatic drying equipment according to claim 8, characterized in that, The box door (12) is slidably connected to the box body (11) via a guide rail. The guide rail is located on one side of the loading port (13) and the unloading port along the height direction of the box body (11) or the width direction of the box body (11).

10. The automatic drying equipment according to claim 1, characterized in that, The box (11) has an inspection door (14) on one side along its length.

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