A cooling device for processing of biodegradable agricultural mulch

Abstract

The utility model relates to mulching film production equipment technical field, specifically disclose a kind of biodegradable agricultural mulching film processing cooling device, including U-shaped seat, the inside of U-shaped seat is provided with cooling mechanism, the cooling mechanism includes the first roller, second roller and third roller sequentially arranged along mulching film body conveying direction, the both ends of the first roller, second roller and third roller are all communicated with the sleeve of U-shaped seat rotationally connected, the inner wall of the first roller, second roller and third roller is all fixedly connected with spiral pipe, one end of the spiral pipe extends to the outside of one side sleeve and is rotatably connected with water inlet pipe by rotating joint, the other end of the spiral pipe extends to the outside of other side sleeve and is communicated with water outlet pipe by rotating joint, by three-stage gradient cooling roller, spiral pipe optimization layout and intelligent temperature control system, the precise temperature control and efficient cooling of degradable mulching film are realized, product quality and production efficiency are significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of agricultural film production equipment, and specifically discloses a cooling device for processing biodegradable agricultural film. Background Technology

[0002] Biodegradable agricultural mulch films (such as PLA / PBAT / starch-based materials) are widely used in agricultural production as an environmentally friendly alternative to traditional PE mulch films. These films can degrade naturally through microbial action, effectively reducing "white pollution" and meeting the requirements of sustainable development. However, their processing is extremely sensitive to temperature control—improper handling during the cooling stage of molten biodegradable materials can easily lead to uneven crystallization and decreased mechanical properties (such as tensile strength fluctuations of ±15% or more), thus affecting their field lifespan. Currently, mainstream production processes use multi-stage drum cooling devices for gradual cooling, but existing cooling systems still have significant shortcomings in adapting to the characteristics of biodegradable materials.

[0003] Existing cooling devices for agricultural mulch film production directly circulate the mulch film into a cold water tank for cooling, which can easily cause uneven crystallinity of the biodegradable material due to sudden cooling, affecting its mechanical properties. Therefore, a cooling device for processing biodegradable agricultural mulch film is needed to solve this problem. Utility Model Content

[0004] This invention proposes a cooling device for processing biodegradable agricultural mulch film. Through a three-stage gradient cooling roller, an optimized spiral tube layout, and an intelligent temperature control system, it achieves precise temperature control and efficient cooling of the biodegradable mulch film, significantly improving product quality and production efficiency.

[0005] This utility model is implemented as follows: a cooling device for processing biodegradable agricultural mulch film includes a U-shaped base, and a cooling mechanism is provided inside the U-shaped base. The cooling mechanism includes a first roller, a second roller, and a third roller arranged sequentially along the conveying direction of the mulch film body. Both ends of the first roller, the second roller, and the third roller are connected to sleeves that are rotatably connected to the U-shaped base. The inner walls of the first roller, the second roller, and the third roller are all fixedly connected to a spiral tube. One end of the spiral tube extends to the outside of one side sleeve and is rotatably connected to a water inlet pipe through a rotating joint. The other end of the spiral tube extends to the outside of the other side sleeve and is connected to a water outlet pipe through a rotating joint.

[0006] As a preferred embodiment of the cooling device for processing biodegradable agricultural mulch film according to this utility model, two vertically distributed air boxes are arranged between the inner walls of the U-shaped base, and multiple air holes are opened on the outer walls of the two air boxes facing each other. A fan with an air outlet connected to the two air boxes is installed on the outer wall of the U-shaped base.

[0007] Preferably, in the case of a cooling device for processing biodegradable agricultural mulch film according to the present invention, the diameters of the first roller, the second roller, and the third roller decrease sequentially.

[0008] As a preferred embodiment of the cooling device for processing biodegradable agricultural mulch film according to this utility model, the pitch of the spiral tubes inside the first roller, the second roller, and the third roller increases sequentially.

[0009] Preferably, in the cooling device for processing biodegradable agricultural mulch film according to this utility model, the first roller, the second roller, and the third roller are all made of copper.

[0010] As a preferred embodiment of the cooling device for processing biodegradable agricultural mulch film according to this utility model, thermally conductive silicone is provided between the inner walls of the plurality of spiral tubes and the first roller, the second roller and the third roller.

[0011] As a preferred embodiment of the cooling device for processing biodegradable agricultural mulch film according to this utility model, the inner wall of the U-shaped base is provided with multiple infrared temperature sensors.

[0012] As a preferred embodiment of the cooling device for processing biodegradable agricultural mulch film according to this utility model, a first limiting roller and a second limiting roller are rotatably connected between the inner walls of the U-shaped seat.

[0013] The beneficial effects of this utility model are:

[0014] 1. By using a three-stage roller diameter decreasing, a spiral tube pitch increasing, and a water temperature gradient in a coordinated design, the phase change characteristics of the biodegradable material are matched, achieving a gradual cooling from high temperature slow cooling to low temperature shaping. This effectively avoids internal stress concentration and uneven crystallization caused by sudden cooling, and significantly improves the mechanical properties and degradation stability of the mulch film.

[0015] 2. The copper roller combined with thermally conductive silicone filling technology eliminates the air insulation layer between the spiral tube and the roller, greatly improving the heat transfer efficiency; supplemented by an infrared temperature sensor to monitor the roller temperature in real time and an air cooling system to assist in cooling, a closed-loop temperature control system is formed to ensure uniform and stable cooling process, while reducing energy consumption and adapting to the production needs of different biodegradable materials. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Fig. 1This is an overall structural diagram of a cooling device for processing biodegradable agricultural mulch film according to this utility model.

[0018] Fig. 2 This is a front sectional view of a cooling device for processing biodegradable agricultural mulch film according to the present invention.

[0019] Fig. 3 This is a structural diagram of the spiral tube of this utility model.

[0020] The markings in the diagram are: 1. U-shaped seat; 2. First roller; 3. Second roller; 4. Third roller; 5. Sleeve; 6. Spiral tube; 7. Mulch film body; 8. Rotary joint; 9. Water inlet pipe; 10. Air box; 11. Air hole; 12. Fan; 13. Infrared temperature sensor; 14. First limit roller; 15. Second limit roller. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figs. 1-3 A cooling device for processing biodegradable agricultural mulch film includes a U-shaped base 1. A cooling mechanism is provided inside the U-shaped base 1. The cooling mechanism includes a first roller 2, a second roller 3, and a third roller 4 arranged sequentially along the conveying direction of the mulch film body 7. Both ends of the first roller 2, the second roller 3, and the third roller 4 are connected to sleeves 5 that are rotatably connected to the U-shaped base 1. The inner walls of the first roller 2, the second roller 3, and the third roller 4 are all fixedly connected to spiral tubes 6. One end of the spiral tube 6 extends to the outside of one side sleeve 5 and is rotatably connected to a water inlet pipe 9 through a rotating joint 8. The other end of the spiral tube 6 extends to the outside of the other side sleeve 5 and is connected to a water outlet pipe through a rotating joint 8.

[0023] In this embodiment: the present invention adopts a three-stage roller structure arranged sequentially. The first roller 2 has the largest diameter and the smallest pitch of the internal spiral tube 6. It uses high-temperature cooling water (about 80°C) to achieve initial slow cooling and avoid internal stress caused by sudden cooling of the molten material. The second roller 3 has a moderate diameter and an increased pitch of the spiral tube 6. It uses medium-temperature cooling water (about 60°C) to allow the material to gradually crystallize. The third roller 4 has the smallest diameter and the largest pitch of the spiral tube 6. It uses low-temperature cooling water (about 40°C) to complete the final shaping. This gradient cooling design is based on the phase change characteristics of biodegradable materials: slow cooling in the high-temperature stage prevents molecular chains from freezing, the medium-temperature stage promotes ordered crystallization, and the low-temperature stage stabilizes the molding.

[0024] As a technical optimization of this utility model, two vertically distributed air boxes 10 are arranged between the inner walls of the U-shaped base 1. Multiple air holes 11 are opened on the outer walls of the two air boxes 10 facing each other. A fan 12 with an air outlet connected to the two air boxes 10 is installed on the outer wall of the U-shaped base 1.

[0025] In this embodiment: the fan 12 is started, and the fan 12 blows cold air into the air box 10 and blows it onto the ground film from multiple air holes 11, which simultaneously assists in cooling the upper and lower sides of the ground film, resulting in a good cooling effect.

[0026] As a technical optimization of this utility model, the diameters of the first roller 2, the second roller 3, and the third roller 4 decrease sequentially.

[0027] In this embodiment, the diameter of the three rollers decreases sequentially, and the temperature gradient is used to achieve gradual cooling of the biodegradable mulch film from high temperature to low temperature, avoiding uneven crystallization due to sudden cooling and ensuring mechanical properties and degradation stability.

[0028] As a technical optimization of this utility model, the pitch of the spiral tube 6 inside the first roller 2, the second roller 3 and the third roller 4 increases sequentially.

[0029] In this embodiment, the pitch of multiple spiral tubes increases sequentially to achieve a gradient temperature control effect of rapid heat absorption in the high-temperature section, balanced heat exchange in the medium-temperature section, and gentle cooling in the low-temperature section, accurately matching the heat exchange requirements of biodegradable materials in different temperature ranges.

[0030] As a technical optimization of this utility model, the first roller 2, the second roller 3 and the third roller 4 are all made of copper.

[0031] In this embodiment, copper rollers are used to significantly improve heat conduction efficiency, ensuring rapid and uniform heat transfer through the three-stage rollers, and accurately achieving the gradient temperature control requirements of 80℃→60℃→40℃.

[0032] As a technical optimization of this utility model, thermally conductive silicone is provided between the multiple spiral tubes 6 and the inner walls of the first roller 2, the second roller 3 and the third roller 4.

[0033] In this embodiment, thermally conductive silicone fills the gap between the spiral tube 6 and the inner wall of the roller, eliminating the air insulation layer, significantly improving the heat conduction efficiency, ensuring that the heat between the cooling water and the roller surface is transferred quickly and evenly, and achieving precise temperature control.

[0034] As a technical optimization of this utility model, the inner wall of the U-shaped seat 1 is provided with multiple infrared temperature sensors 13.

[0035] In this embodiment, the infrared temperature sensor 13 monitors the surface temperature of the rotating roller in a non-contact manner and provides real-time feedback to adjust the cooling system, ensuring gradient temperature control accuracy (±1.5℃) and avoiding the delay and error of traditional contact temperature measurement.

[0036] As a technical optimization of this utility model, the inner walls of the U-shaped seat 1 are rotatably connected by a first limiting roller 14 and a second limiting roller 15.

[0037] In this embodiment, the first limiting roller 14 and the second limiting roller 15 facilitate the guidance and positioning of the mulch film body 7.

[0038] The working principle of this invention is as follows: This invention employs a three-stage roller structure arranged sequentially. The first roller (2) has the largest diameter and the smallest pitch in its internal spiral tube (6), achieving initial slow cooling with high-temperature cooling water (approximately 80°C) to prevent internal stress caused by rapid cooling of the molten material. The second roller (3) has a moderate diameter and a larger pitch in its spiral tube (6), using medium-temperature cooling water (approximately 60°C) to allow the material to gradually crystallize. The third roller (4) has the smallest diameter and the largest pitch in its spiral tube (6), using low-temperature cooling water (approximately 40°C) to complete the final shaping. This gradient cooling design is based on the phase change characteristics of biodegradable materials: slow cooling in the high-temperature stage prevents molecular chains from freezing, the medium-temperature stage promotes ordered crystallization, and the low-temperature stage stabilizes the molding process. Simultaneously, the copper rollers and thermally conductive silicone enhance heat transfer efficiency, supplemented by an air-cooling system and infrared thermography to ensure precise and controllable cooling, thereby obtaining a biodegradable mulch film product with uniform performance.

[0039] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0040] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A cooling device for processing biodegradable agricultural mulch film, comprising a U-shaped base (1), characterized in that: The U-shaped seat (1) is equipped with a cooling mechanism. The cooling mechanism includes a first roller (2), a second roller (3) and a third roller (4) arranged sequentially along the conveying direction of the mulch film body (7). Both ends of the first roller (2), the second roller (3) and the third roller (4) are connected to a sleeve (5) that is rotatably connected to the U-shaped seat (1). The inner walls of the first roller (2), the second roller (3) and the third roller (4) are all fixedly connected to a spiral tube (6). One end of the spiral tube (6) extends to the outside of one side sleeve (5) and is rotatably connected to a water inlet pipe (9) through a rotating joint (8). The other end of the spiral tube (6) extends to the outside of the other side sleeve (5) and is connected to a water outlet pipe through a rotating joint (8).

2. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: Two vertically distributed air boxes (10) are provided between the inner walls of the U-shaped seat (1). Multiple air holes (11) are opened on the outer walls of the two air boxes (10) facing each other. A fan (12) with an air outlet connected to the two air boxes (10) is installed on the outer wall of the U-shaped seat (1).

3. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: The diameters of the first roller (2), the second roller (3), and the third roller (4) decrease sequentially.

4. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: The pitch of the spiral tubes (6) inside the first roller (2), the second roller (3) and the third roller (4) increases sequentially.

5. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: The first roller (2), the second roller (3) and the third roller (4) are all made of copper.

6. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: Thermally conductive silicone is provided between the multiple spiral tubes (6) and the inner walls of the first roller (2), the second roller (3) and the third roller (4).

7. The cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: The inner wall of the U-shaped base (1) is provided with multiple infrared temperature sensors (13).

8. A cooling device for processing biodegradable agricultural mulch film according to claim 1, characterized in that: The inner walls of the U-shaped seat (1) are rotatably connected by a first limiting roller (14) and a second limiting roller (15).

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