A wind-cooled thin-film heat exchange cooling device

Abstract

This utility model relates to the field of printing press technology, and in particular to an air-cooled thin-film heat exchange cooling device. The heat exchange cooling device includes: a cooling box, the interior of which forms a cavity for accommodating cooling air, the cooling box being fixed between the left and right wall panels of the printing press by a mounting bracket; a cooling air supply assembly connected to the cooling box for supplying cooling air to the cavity of the cooling box; and at least one cooling aluminum roller, the cooling aluminum roller being rotatably mounted between the left and right wall panels of the printing press, and the roller surface of the cooling aluminum roller being close to the outer wall surface of the cooling box to achieve heat exchange with the cooling box and cool the cooling aluminum roller. This utility model solves the defects of traditional water-cooled rollers in the prior art, such as heavy weight, easy slippage, water leakage and corrosion, and complex structure.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to an air-cooled thin-film heat exchange cooling device. Background Technology

[0002] In high-speed gravure printing presses, after printing and heat drying, the film needs to be rapidly cooled to a suitable temperature in order to proceed with the next color group of printing. Traditional cooling methods often employ water-cooled rollers, which circulate cold or chilled water through the roller body to reduce the roller surface temperature through heat exchange, thereby cooling the film.

[0003] However, traditional water cooling methods have the following drawbacks:

[0004] 1. Heavy weight and high inertia: The water-cooled roller is filled with liquid, resulting in a large overall weight and high friction during rotation. This can easily cause slippage between the cooling roller and the film, especially when the film width is narrow. 2. Prone to leakage and equipment damage: After prolonged use, the cooling roller is prone to poor sealing and leakage, which not only affects the cooling effect but also corrodes equipment components (such as bearings), reducing equipment lifespan. 3. Complex system and inconvenient maintenance: It requires supporting water supply pipelines, water pumps, water storage devices, etc., resulting in a complex structure, high installation and maintenance costs, and inconvenience in cleaning and replacing parts.

[0005] Therefore, there is an urgent need for a thin-film cooling device that is simple in structure, highly reliable, and does not require a water medium. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of traditional water-cooled rollers in the prior art, such as heavy weight, slippage, water leakage and corrosion, and complex structure, and to propose an air-cooled thin-film heat exchange cooling device. To achieve the purpose of this invention, the following technical solution is adopted:

[0007] A wind-cooled thin-film heat exchange cooling device, the heat exchange cooling device comprising:

[0008] The cooling box has an internal cavity for containing cooling air, and the cooling box is fixed between the left and right wall panels of the printing press by a mounting bracket.

[0009] A cooling air supply assembly, connected to the cooling housing, is used to supply cooling air into the cavity of the cooling housing.

[0010] At least one cooling aluminum roller is rotatably mounted between the left and right wall panels of the printing press, and the roller surface of the cooling aluminum roller is close to the outer wall surface of the cooling box to achieve heat exchange with the cooling box and cool the cooling aluminum roller.

[0011] A further improvement is that the cooling air supply assembly includes a cooling air generating device, an air inlet pipe, and an air inlet interface. The air outlet of the cooling air generating device is connected to one end of the air inlet pipe, the air inlet interface is located on the side wall of the cooling box, and the other end of the air inlet pipe is connected to the cavity of the cooling box through the air inlet interface.

[0012] A further improvement is that the cooling air generating device is an industrial air conditioner or an industrial air cooler.

[0013] A further improvement is that a filter screen is provided at the air inlet.

[0014] A further improvement is that a cooling box front cover is detachably installed on the front side of the cooling box body.

[0015] A further improvement is that the number of cooling aluminum rollers is two sets, and the two sets of cooling aluminum rollers are arranged in parallel vertically.

[0016] A further improvement is that L-shaped grooves are provided at the upper and lower corners of the front side of the cooling box, respectively, to accommodate two sets of cooling aluminum rollers.

[0017] A further improvement is that an air-cooled box is provided on one side of the heat exchange cooling device. The air-cooled box is fixed between the left and right wall panels of the printing press. An air-cooled box nozzle is provided on the air-cooled box. The air-cooled box nozzle is opened on the side of the air-cooled box facing the film movement path, and is used to spray cold air onto the film to reduce the temperature of the film printing surface.

[0018] A further improvement is that a hot drying box is provided on one side of the air-cooled box, the hot drying box is fixed between the left and right wall panels of the printing press, and a first guide roller group is provided in the hot drying box, the first guide roller group is installed between the left and right wall panels of the printing press.

[0019] A further improvement is that a second guide roller assembly is provided above the hot drying box. The second guide roller assembly is installed between the left and right wall panels of the printing press and is used to receive the film after it has been processed by the heat exchange cooling device.

[0020] The beneficial effects of this utility model are as follows:

[0021] Completely solves the slippage problem and has greater adaptability: The heat exchange cooling device of this utility model uses cooling air, so there is no need to introduce cold water into the cooling aluminum roller. The cooling aluminum roller is lighter than the traditional water-cooled roller, and the rotational friction is greatly reduced. Even for narrow films with small width, it can provide stable friction, avoid slippage, and ensure printing accuracy.

[0022] Eliminate water leakage and corrosion at the source, resulting in a longer equipment lifespan: Dry cooling air is used as the cooling medium throughout the process, with no water-conducting components, completely eliminating the water leakage problem of traditional water-cooled rollers; the cooling box, cooling aluminum rollers, and surrounding bearings and other components are all in a dry environment, with no risk of rust.

[0023] More compact structure and easier maintenance: No need for complex water supply pipelines, water storage devices and other auxiliary systems, the overall structure occupies less space; the front cover of the cooling box is removable, making cleaning and replacement of parts more convenient. Attached Figure Description

[0024] Figure 1 This is a partial sectional view of the installation structure of an air-cooled thin-film heat exchange cooling device and a printing press according to this utility model;

[0025] Figure 2 for Figure 1 View from direction A;

[0026] Figure 3 This is a schematic diagram of the L-shaped groove in the cooling box.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Cooling chamber; 2. Membrane; 3. Left wall panel; 4. Right wall panel; 5. Cooling aluminum roller; 6. Cooling air generating device; 7. Air inlet pipe; 8. Air inlet interface; 9. Filter screen; 10. Cooling chamber front cover; 11. L-shaped groove; 12. Air-cooled box; 13. Nozzle; 14. Hot drying box; 15. First guide roller group; 16. Second guide roller group; 17. Mounting bracket. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model; therefore, the drawings only show the components relevant to this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] It should be noted that when a component is said to be "mounted" on another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms “and” and “and” as used herein include any and all combinations of one or more of the associated listed items.

[0032] Please refer to the attached document. Figure 1 - Appendix Figure 3 This utility model embodiment proposes an air-cooled thin film heat exchange cooling device for cooling the printed film 2 after heat drying in a gravure printing machine, such as... Figure 1 and Figure 2 As shown, the heat exchange cooling device includes:

[0033] The cooling box 1 has an internal cavity for containing cooling air. The cooling box 1 is fixed between the left wall panel 3 and the right wall panel 4 of the printing press by a mounting bracket 17.

[0034] A cooling air supply assembly is connected to the cooling housing 1 to supply cooling air into the cavity of the cooling housing 1.

[0035] At least one cooling aluminum roller 5 is rotatably mounted between the left wall plate 3 and the right wall plate 4 of the printing press, and the roller surface of the cooling aluminum roller 5 is close to the outer wall surface of the cooling box 1 to achieve heat exchange with the cooling box 1 and cool the cooling aluminum roller 5.

[0036] Specifically, the two ends of the cooling aluminum roller 5 are rotatably mounted between the left wall plate 3 and the right wall plate 4 of the printing press via bearings, and the surface of the cooling aluminum roller 5 is anodized. The cooling box 1 can be made of aluminum alloy with excellent thermal conductivity.

[0037] In this embodiment, the cooling air supply assembly includes a cooling air generating device 6, an air inlet pipe 7, and an air inlet interface 8. Each color group's cooling housing 1 is provided with a corresponding air inlet interface 8. The air inlet pipe 7 has branch interfaces to distribute cooling air to each color group of the gravure printing machine. The air outlet of the cooling air generating device 6 is connected to one end of the air inlet pipe 7. The air inlet interface 8 is located on the side wall of the cooling housing 1, and the other end of the air inlet pipe 7 is connected to the cavity of the cooling housing 1 through the air inlet interface 8. The cooling air generating device 6 is an industrial air conditioner or an industrial evaporative cooler, or a similar device for generating cool air.

[0038] Understandably, the cooling air is generated by an external air conditioner or industrial air cooler and sent into the internal cavity of the cooling box 1 through the air inlet pipe 7 and the air inlet interface 8. The cooling air circulates in the cavity and exchanges heat fully with the inner wall of the cooling box 1, thereby reducing the temperature of the entire cooling box 1.

[0039] In a preferred embodiment, a filter screen 9 is provided at the air inlet 8. The filter screen 9 can be made of polymer filter cotton.

[0040] It is understandable that by providing a filter screen 9 at the air inlet 8, dust and small impurities in the cooling air can be filtered out. The dry cooling air generated by the air conditioner is distributed to the air inlet 8 of each color group through the air inlet pipe 7. After being filtered of impurities by the filter screen 9, it enters the interior of the cooling box 1, causing the temperature of the cooling box 1 to drop.

[0041] In a preferred embodiment, a cooling box front cover 10 is detachably installed on the front side of the cooling box body 1. Specifically, the cooling box front cover 10 can be locked to the cooling box body 1 by clips or bolts, and the cooling box front cover 10 can be completely removed to facilitate cleaning the inside of the cooling box body 1 cavity or replacing the cooling box front cover 10.

[0042] In a preferred embodiment of this invention, the number of cooling aluminum rollers 5 is two sets, and the two sets of cooling aluminum rollers 5 are arranged vertically in parallel. For example... Figure 3 As shown, L-shaped grooves 11 are respectively provided at the upper and lower corners of the front side of the cooling box 1 to accommodate two sets of cooling aluminum rollers 5. The outer wall surface of the L-shaped groove 11 is parallel to the roller surface of the cooling aluminum roller 5. The top roller surface of the upper cooling aluminum roller 5 protrudes from the top surface of the cooling box 1, and the front roller surface protrudes from the front side of the cooling box 1. The bottom roller surface of the lower cooling aluminum roller 5 protrudes from the bottom surface of the cooling box 1, and the front roller surface protrudes from the front side of the cooling box 1, so as to guide the film 2.

[0043] It is understandable that by setting an L-shaped groove 11 to accommodate two sets of cooling aluminum rollers 5, the heat exchange area between the cooling aluminum rollers 5 and the outer wall of the cooling box 1 can be increased, resulting in a better cooling effect.

[0044] In this embodiment, a cooling box 12 is provided on one side of the heat exchange cooling device. The cooling box 12 is fixed between the left wall plate 3 and the right wall plate 4 of the printing machine. The cooling box 12 is provided with a cooling box 12 nozzle 13. The cooling box 12 nozzle 13 is opened on the side of the cooling box 12 facing the movement path of the film 2, and is used to spray cold air onto the film 2 to reduce the temperature of the printing surface of the film 2.

[0045] In this embodiment, a hot drying box 14 is provided on one side of the air-cooled box 12. The hot drying box 14 is fixed between the left wall plate 3 and the right wall plate 4 of the printing machine. A first guide roller group 15 is provided in the hot drying box 14 to guide the movement path of the film 2 in the hot drying box 14. The first guide roller group 15 is installed between the left wall plate 3 and the right wall plate 4 of the printing machine.

[0046] In this embodiment, a second guide roller group 16 is provided above the hot drying box 14. The second guide roller group 16 is installed between the left wall plate 3 and the right wall plate 4 of the printing machine to receive the film 2 after it has been processed by the heat exchange cooling device and to guide the film 2 to the next color group printing unit.

[0047] The working principle of this utility model is as follows: During operation, under the guidance of the first guide roller group 15, the high-temperature printed film 2 that comes out of the hot drying box 14 is first cooled by the air cooling box 12 and its nozzle 13. Then, it is conducted to the cooling aluminum roller 5 located below the cooling box 1 and comes into contact with part of the outer peripheral surface of the cooling aluminum roller 5. Then, it is conducted to the cooling aluminum roller 5 located above the cooling box 1 and comes into contact with part of the outer peripheral surface of the cooling aluminum roller 5. The heat of the film 2 is quickly transferred to the cooling aluminum roller 5. The heat of the cooling aluminum roller 5 is then continuously absorbed by the low-temperature cooling box 1 through heat conduction, thereby achieving efficient and continuous cooling. The cooled film 2 is guided into the next printing unit by the second guide roller group 16.

[0048] The air-cooled thin-film heat exchange cooling device provided by this utility model has the following beneficial effects:

[0049] Completely solves the slippage problem and has stronger adaptability: The heat exchange cooling device of this utility model uses cooling air, so there is no need to introduce cold water into the cooling aluminum roller 5. The cooling aluminum roller 5 is lighter than the traditional water-cooled roller, and the rotational friction is greatly reduced. Even for narrow films 2 with small width, it can provide stable friction, avoid slippage, and ensure printing accuracy.

[0050] Eliminate water leakage and corrosion at the source, resulting in a longer equipment lifespan: Dry cooling air is used as the cooling medium throughout the process, with no water-conducting components, completely eliminating the water leakage problem of traditional water-cooled rollers; Cooling box 1, cooling aluminum roller 5 and surrounding bearings and other components are all in a dry environment, with no risk of rust.

[0051] More compact structure and easier maintenance: No need for complex water supply pipelines, water storage devices and other auxiliary systems, the overall structure occupies less space; the front cover of the cooling box is detachable, making cleaning and replacement of parts more convenient.

[0052] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered as within the scope of this specification. The above embodiments only illustrate specific implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A wind-cooled thin-film heat exchange cooling device, characterized in that, The heat exchange cooling device includes: The cooling box has an internal cavity for containing cooling air, and the cooling box is fixed between the left and right wall panels of the printing press by a mounting bracket. A cooling air supply assembly, connected to the cooling housing, is used to supply cooling air into the cavity of the cooling housing. At least one cooling aluminum roller is rotatably mounted between the left and right wall panels of the printing press, and the roller surface of the cooling aluminum roller is close to the outer wall surface of the cooling box to achieve heat exchange with the cooling box and cool the cooling aluminum roller.

2. The air-cooled thin-film heat exchange cooling device according to claim 1, characterized in that, The cooling air supply assembly includes a cooling air generating device, an air inlet pipe, and an air inlet interface. The air outlet of the cooling air generating device is connected to one end of the air inlet pipe. The air inlet interface is located on the side wall of the cooling box. The other end of the air inlet pipe is connected to the cavity of the cooling box through the air inlet interface.

3. The air-cooled thin-film heat exchange cooling device according to claim 2, characterized in that, The cooling air generating device is an industrial air conditioner or an industrial air cooler.

4. The air-cooled thin-film heat exchange cooling device according to claim 2, characterized in that, A filter screen is installed at the air inlet.

5. The air-cooled thin-film heat exchange cooling device according to claim 1, characterized in that, A cooling box front cover is detachably installed on the front side of the cooling box.

6. The air-cooled thin-film heat exchange cooling device according to claim 1, characterized in that, The cooling aluminum rollers are in two sets, and the two sets of cooling aluminum rollers are arranged in parallel, one above the other.

7. The air-cooled thin-film heat exchange cooling device according to claim 6, characterized in that, The cooling box has L-shaped grooves at the top and bottom corners on the front side, which are used to accommodate the two sets of cooling aluminum rollers.

8. The air-cooled thin-film heat exchange cooling device according to claim 1, characterized in that, A cooling box is provided on one side of the heat exchange cooling device. The cooling box is fixed between the left and right wall panels of the printing machine. The cooling box is provided with a cooling box nozzle, which is located on the side of the cooling box facing the film movement path, and is used to spray cold air onto the film to reduce the temperature of the film printing surface.

9. The air-cooled thin-film heat exchange cooling device according to claim 8, characterized in that, A hot drying box is provided on one side of the air-cooled box. The hot drying box is fixed between the left and right wall panels of the printing press. A first guide roller group is provided in the hot drying box. The first guide roller group is installed between the left and right wall panels of the printing press.

10. A wind-cooled thin-film heat exchange cooling device according to claim 9, characterized in that, A second guide roller assembly is provided above the hot drying box. The second guide roller assembly is installed between the left and right wall panels of the printing press and is used to receive the film after it has been processed by the heat exchange cooling device.

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