A composite paper box drying machine with adjustable temperature and humidity

Abstract

The utility model belongs to carton drying technical field especially, it is adjustable temperature and humidity's composite carton drying machine, to the single temperature zone hot blast direct blow of existing traditional carton drying equipment easily leads to the problem of paperboard surface hardening, deformation and single point dehumidification difficult humidity difference, cause carton strength to drop, present and propose the following scheme, including drying box, the drying box inside is equipped with mesh belt conveyor, two ends extend to the outside of drying box, in the utility model, the utility model realizes heat source dynamic regulation through liftable infrared radiation board, and the evenness of carton heating is optimized, and deformation is reduced and the qualified rate is promoted, adopt hot blast backflow and directional transmission airflow technology, form closed loop heat energy circulation, significantly reduce dehydration energy consumption, utilize three way dehumidification structure and intelligent humidity monitoring, realize horizontal humidity field dynamic balance, optimize moisture content distribution, enhance carton compression strength and performance consistency.

Description

Technical Field

[0001] This utility model relates to the field of cardboard drying technology, and in particular to a composite cardboard dryer with adjustable temperature and humidity. Background Technology

[0002] Drying is a crucial step in the production and processing of cardboard boxes. Its purpose is to remove moisture from the boxes and ensure their quality and performance.

[0003] Traditionally, most equipment used for drying cartons employs continuous drying in a single temperature zone, which involves heating the cardboard through hot air convection. However, direct hot air blowing causes the cardboard surface to harden and internal moisture migration to lag (moisture content gradient > 15%), leading to warping and deformation (industry average deformation rate ≥ 2.5%). At the same time, single-point dehumidification cannot respond to differences in humidity distribution, and localized over-drying / over-wetting can easily cause a 10-15% decrease in carton strength. Therefore, we propose a composite carton dryer with adjustable temperature and humidity to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing traditional cardboard drying equipment, such as the tendency for direct hot air blowing in a single temperature zone to harden and deform the cardboard surface, and the difficulty in responding to humidity differences through single-point dehumidification, which leads to a decrease in the strength of the cardboard. Therefore, this invention proposes a composite cardboard dryer with adjustable temperature and humidity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A temperature and humidity adjustable composite cardboard box dryer, comprising a drying chamber,

[0007] The drying chamber is equipped with a mesh belt conveyor that extends to the outside of the drying chamber at both ends.

[0008] The drying chamber is divided into a preheating section, a drying section and a cooling section along the conveying direction;

[0009] The preheating section is equipped with multiple liftable infrared radiation heating plates, configured to dynamically adjust the distance of the heat source to eliminate thermal stress deformation of the carton.

[0010] The top of the drying section is equipped with a three-way dehumidification hood, which has two air inlets connected to the drying section and an air outlet connected to an external dehumidifier, and is configured to independently control the humidity in two zones.

[0011] The preheating section and the drying section are connected on the same side by a return pipe. The return pipe is equipped with a first hot air fan, which is configured to pressurize and return the hot air that leaks into the preheating section to the drying section.

[0012] In one possible design, a hydraulic telescopic rod is fixedly connected to the top of the preheating section, with its output end passing through the top of the preheating section and fixedly connected to the top of the movable plate; multiple infrared radiation heating plates are fixedly connected to the bottom of the movable plate; limiting rods are fixedly connected to the inner walls on both sides of the preheating section, and limiting grooves that slide and cooperate with the limiting rods are opened on both sides of the movable plate.

[0013] In one possible design, two laminar flow circulating hot air fans are fixed to the inner walls on both sides of the preheating section via supports.

[0014] In one possible design, a heating tube is fixed to the top of the drying section, and multiple heating blocks are fixed inside the tube; multiple high-pressure centrifugal hot air blowers are fixed inside the heating tube above the heating blocks.

[0015] In one possible design, the through holes at both ends of the return pipe are connected to the preheating section and the drying section, respectively; the first hot air fan is fixed inside the return pipe near the through hole of the drying section; and the return pipe is provided with a first regulating component for adjusting the flow rate.

[0016] In one possible design, the first adjustment component includes a second guide plate rotatably connected to the return pipe via a first rotating shaft; a second motor is fixedly connected to the top of the return pipe, and its output end is fixedly connected to the top of the first rotating shaft.

[0017] In one possible design, a second adjustment component is provided at each of the two air inlets of the three-way dehumidifier; the second adjustment component includes a first guide plate rotatably connected to the inside of the three-way dehumidifier via a second rotating shaft; a first motor is fixedly connected to one side of the three-way dehumidifier, and its output end is fixedly connected to one end of the second rotating shaft.

[0018] In one possible design, monitoring components are fixedly connected to the inner top wall of the drying section on both sides of the heating tube; the monitoring components include a humidity sensor and a temperature sensor; when the humidity sensor on one side detects a higher value than the one on the other side, the first motor drives the corresponding first guide plate to increase the opening of the dehumidification port on the current side.

[0019] In this application, when the dryer is working, the cartons enter the drying chamber via a mesh belt conveyor and first enter the preheating section. In the preheating section, the hydraulic telescopic rod can adjust the height of the infrared radiation heating plate according to the thickness of the cartons, so that the infrared radiation heating plate group can preheat the cartons evenly, achieving adaptability to cartons of different thicknesses and improving the drying effect. At the same time, the laminar flow circulating hot air fan works to promote air circulation in the preheating section, making the preheating of the cartons more uniform.

[0020] Next, the cardboard box enters the drying section. The heating blocks inside the heating tubes heat up, and the high-pressure centrifugal hot air fan blows out the heat to dry the cardboard box. Multiple heating blocks provide sufficient heat to ensure drying efficiency. Two sets of monitoring components collect temperature and humidity data of the horizontal partition of the drying section in real time. When the humidity sensor on one side detects a higher value than the other side, the first motor in the second adjustment component corresponding to the two desiccant ports of the three-way desiccant hood starts, driving the corresponding first guide plate to increase the opening of the current desiccant port and achieve dynamic humidity balance.

[0021] Meanwhile, the first hot air fan in the return pipe transports part of the hot air from the drying section to the preheating section through the return pipe, realizing heat recycling and improving energy efficiency. The first regulating component drives the second guide plate through the second motor to regulate the return air volume to adapt to different drying needs.

[0022] Finally, the cartons enter the cooling section, and after cooling, they are output from the other end of the mesh belt conveyor, completing the entire drying process. Throughout the process, the coordinated work of various components enables adjustable temperature and humidity drying of the cartons, improving drying quality and efficiency while reducing energy consumption.

[0023] Beneficial effects: In this utility model, the adjustable temperature and humidity composite carton dryer, through the liftable infrared radiation plate, realizes the dynamic adjustment of the distance between the heat source and the carton during preheating. It not only adapts to the heating range of cartons of different thicknesses, but also optimizes the uniformity of the temperature distribution of the carton, effectively eliminates the warping deformation problem caused by thermal stress concentration, significantly reduces the diagonal deformation of the carton, and improves the product qualification rate.

[0024] In this utility model, the adjustable temperature and humidity composite carton dryer uses a hot air return pipeline and a first adjustment component to pressurize and return the leaked heat energy in the preheating zone to the drying section, forming a closed-loop heat energy circulation system. Combined with the directional penetrating airflow constructed by the high-pressure centrifugal fan and the heating module, it breaks through the energy consumption bottleneck of traditional diffusion heating, realizes the cascade utilization and directional transportation of heat energy, improves heat recovery efficiency, and thus reduces the dehydration energy consumption of the dryer.

[0025] In this utility model, the adjustable temperature and humidity composite carton dryer achieves independent adjustment of the two air inlets through the dual air inlets of the three-way dehumidification hood and two second adjustment components respectively set in the dual air inlets. Combined with a high-precision temperature and humidity monitoring system, it intelligently allocates the dehumidification ratio, realizes dynamic balance control of the transverse humidity field of the drying section, effectively reduces regional humidity differences, simultaneously optimizes the uniformity of moisture content distribution of the carton, improves the compressive strength of the finished product, and ensures the consistency of the physical properties of the carton.

[0026] In this invention, the heat source is dynamically adjusted by using a liftable infrared radiation plate, which optimizes the heating uniformity of the carton, reduces deformation, and improves the pass rate. Hot air recirculation and directional transmission airflow technology are used to form a closed-loop heat energy cycle, which significantly reduces dehydration energy consumption. The three-way dehumidification structure and intelligent humidity monitoring are used to achieve dynamic balance of the lateral humidity field, optimize the moisture content distribution, and improve the compressive strength and performance consistency of the carton. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a composite carton dryer with adjustable temperature and humidity proposed in this utility model.

[0028] Figure 2 This is a partial exploded three-dimensional structural diagram of a composite carton dryer with adjustable temperature and humidity proposed in this utility model.

[0029] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the drying chamber of a composite carton dryer with adjustable temperature and humidity proposed in this utility model.

[0030] Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the return pipe of a composite carton dryer with adjustable temperature and humidity proposed in this utility model.

[0031] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the three-way desiccant hood of a composite carton dryer with adjustable temperature and humidity proposed in this utility model.

[0032] In the diagram: 1. Drying oven; 101. Preheating section; 102. Drying section; 103. Cooling section; 2. Mesh belt conveyor; 3. Moving plate; 4. Limiting rod; 5. Infrared radiation heating plate; 6. Hydraulic telescopic rod; 7. Heating tube; 8. Heating block; 9. Three-way dehumidification hood; 10. First guide plate; 11. First motor; 12. Return pipe; 13. Second guide plate; 14. Second motor; 15. First hot air fan; 16. High-pressure centrifugal hot air fan; 17. Laminar flow circulating hot air fan; 18. Monitoring components. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] In one embodiment: Refer to Figure 1-5A dryer includes a drying chamber 1, with a mesh belt conveyor 2 installed inside the drying chamber 1, extending to the outer sides of both ends of the drying chamber 1 for conveying cartons. The drying chamber 1 is internally divided into a preheating section 101, a drying section 102, and a cooling section 103, with the drying section 102 located between the preheating section 101 and the cooling section 103.

[0035] The preheating section 101 is equipped with a preheating assembly, including a movable plate 3 and multiple infrared radiation heating plates 5 fixed to its bottom. A hydraulic telescopic rod 6 is fixed to the top of the preheating section 101, with its output end passing through the top of the preheating section 101 and fixedly connected to the top of the movable plate 3. This rod drives the movable plate 3 to move up and down, thereby adjusting the distance between the infrared radiation heating plates 5 and the carton. Two limiting rods 4 are fixed inside each side of the preheating section 101. Corresponding limiting grooves are opened on both sides of the movable plate 3, and the limiting rods 4 slide in the limiting grooves to ensure the stability of the movable plate 3's movement. During operation, the hydraulic telescopic rod 6 adjusts the height of the infrared radiation heating plates 5 according to the carton thickness, ensuring uniform preheating of the carton by the infrared radiation heating plates 5, adapting to cartons of different thicknesses. Simultaneously, two laminar flow circulating hot air fans 17 are fixed to the inner walls of both sides of the preheating section 101 via brackets, promoting air circulation within the preheating section and ensuring more uniform preheating of the carton.

[0036] The drying section 102 is equipped with a drying assembly, including a heating tube 7 fixed at the top and multiple heating blocks 8 installed inside it. The heating blocks 8 generate heat to provide drying heat. Multiple high-pressure centrifugal hot air blowers 16 are fixed inside the heating tube 7 and above the heating blocks 8 to blow out the heat generated by the heating blocks 8, drying the cartons. The multiple heating blocks 8 ensure sufficient heat to guarantee drying efficiency. Monitoring components 18, including humidity and temperature sensors, are installed on the inner wall of the top of the drying section 102 on both sides of the heating tube 7 for real-time monitoring of the temperature and humidity within the drying section 102.

[0037] A reflux assembly is installed on both sides of the preheating section 101 and the drying section 102. A reflux pipe 12 is located on the same side, with through holes at both ends connecting to the preheating section 101 and the drying section 102, respectively. A first hot air fan 15 is fixed inside the reflux pipe 12 near the through hole of the drying section 102, transporting a portion of the hot air from the drying section to the preheating section 101 through the reflux pipe 12, achieving heat recycling and improving energy efficiency. A first adjustment assembly is installed inside the reflux pipe 12, including a second guide plate 13, which is rotatably mounted inside the reflux pipe 12 via a first rotating shaft. A second motor 14 is fixed to the top of the reflux pipe 12, and the top end of the first rotating shaft extends to the top and is fixedly connected to the output end of the second motor 14. The second motor 14 drives the second guide plate 13 to rotate, adjusting the reflux airflow to adapt to different drying requirements.

[0038] This application can be used in the field of cardboard drying technology, or in other fields applicable to this application.

[0039] In another embodiment: Reference Figure 2-5 An improvement upon Embodiment 1: A composite carton dryer with adjustable temperature and humidity, applied in the field of carton drying technology, features a three-way dehumidifying hood 9 at the top of the drying section 102. Two air inlets of the hood are connected to the drying section 102, and the air outlet is connected to an external dehumidifier. The three-way dehumidifying hood 9 has second adjustment components at both air inlets, including a first guide plate 10 rotatably mounted inside via a second rotating shaft. A first motor 11 is fixed to one side of the three-way dehumidifying hood 9, and one end of the second rotating shaft extends to one side and is fixedly connected to the output end of the first motor 11. The first motor 11 drives the first guide plate 10 to rotate, adjusting the airflow at the air inlets to control the humidity within the drying section. When the humidity sensor reading on one side is higher than that on the other side, the second adjustment components at the two air inlets of the three-way dehumidifying hood 9 activate, the first motor 11 starts, driving the first guide plate 10 to rotate, increasing the opening of the dehumidifying port on the current side, and achieving dynamic humidity balance.

[0040] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 11 and the second motor 14 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0041] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite carton dryer with adjustable temperature and humidity, comprising a drying chamber (1), characterized in that: The drying box (1) is equipped with a mesh belt conveyor (2) that extends to the outside of the drying box at both ends; The drying box (1) is divided into a preheating section (101), a drying section (102) and a cooling section (103) along the conveying direction. The preheating section (101) is equipped with multiple liftable infrared radiation heating plates (5), which are configured to dynamically adjust the distance of the heat source to eliminate thermal stress deformation of the carton. The top of the drying section (102) is provided with a three-way dehumidification hood (9), whose double air inlets are connected to the drying section and whose air outlet is connected to an external dehumidifier, and is configured to independently control the humidity of the two zones; The preheating section (101) and the drying section (102) are connected on the same side by a return pipe (12), which is equipped with a first hot air fan (15) configured to pressurize and return the hot air leaked into the preheating section to the drying section.

2. The temperature and humidity adjustable composite carton dryer according to claim 1, characterized in that: The top of the preheating section (101) is fixedly connected to a hydraulic telescopic rod (6), the output end of which passes through the top of the preheating section and is fixedly connected to the top of the moving plate (3); multiple infrared radiation heating plates (5) are fixedly connected to the bottom of the moving plate (3); limiting rods (4) are fixedly connected to the inner walls on both sides of the preheating section (101), and limiting grooves that slide with the limiting rods (4) are opened on both sides of the moving plate (3).

3. The temperature and humidity adjustable composite carton dryer according to claim 2, characterized in that: Two laminar flow circulating hot air fans (17) are fixed to the inner walls on both sides of the preheating section (101) by brackets.

4. The temperature and humidity adjustable composite carton dryer according to claim 1, characterized in that: The top of the drying section (102) is fixed with a heating tube (7), and multiple heating blocks (8) are fixed inside it; multiple high-pressure centrifugal hot air blowers (16) are fixed inside the heating tube (7) above the heating blocks (8).

5. The temperature and humidity adjustable composite carton dryer according to claim 1, characterized in that: The through holes at both ends of the return pipe (12) are connected to the preheating section (101) and the drying section (102), respectively. The first hot air blower (15) is fixed inside the return pipe (12) near the through hole of the drying section (102); the return pipe (12) is provided with a first regulating component for regulating flow rate.

6. The temperature and humidity adjustable composite carton dryer according to claim 5, characterized in that: The first adjustment component includes a second guide plate (13) rotatably connected to the return pipe (12) via a first rotating shaft; the top of the return pipe (12) is fixedly connected to a second motor (14), the output end of which is fixedly connected to the top of the first rotating shaft.

7. The temperature and humidity adjustable composite carton dryer according to claim 1, characterized in that: The two air inlets of the three-way dehumidifier (9) are each provided with a second adjustment component; the second adjustment component includes a first guide plate (10) rotatably connected to the inside of the three-way dehumidifier (9) via a second rotating shaft; a first motor (11) is fixedly connected to one side of the three-way dehumidifier (9), and its output end is fixedly connected to one end of the second rotating shaft.

8. The temperature and humidity adjustable composite carton dryer according to claim 1, characterized in that: The top inner wall of the drying section (102) is fixed with monitoring components (18) on both sides of the heating tube (7); the monitoring components (18) include a humidity sensor and a temperature sensor; when the humidity sensor on one side detects a higher value than the other side, the first motor (11) drives the corresponding first guide plate (10) to increase the opening of the dehumidification port on the current side.

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