Novel dew condensation preventing cooling roll device

Abstract

The utility model relates to a cooling roller technical field, concretely relates to a novel prevent dewing cooling roller device, and the cooling roller includes the hollow outer casing, the outer casing includes the pipe body structure, and the pipe body structure both ends respectively set up for the end cover used closed, still include the inner casing of setting in the outer casing, and the outer casing and the inner casing form the cooling water chamber between, the outer casing is provided with the shaft along the axial direction, the shaft and the outer casing fixed connection, the shaft one end forms the water inlet channel inward, and the water inlet channel one end is located outside the outer casing and is used as the water inlet interface, and the water inlet channel other end sets up the water inlet hole of penetrating the shaft, and the water inlet hole is connected to the middle part of the cooling water chamber along the axial direction of the cooling roller, the shaft other end forms the water outlet channel inward, and the water outlet channel one end is located outside the outer casing and is used as the water outlet interface, and the water outlet channel other end sets up the water outlet hole of penetrating the shaft, and the water outlet hole is connected to the cooling water chamber.

Description

Technical Field

[0001] This utility model relates to the field of cooling roller technology, and specifically to a cooling roller device for preventing condensation. Background Technology

[0002] In many industrial production processes, such as calendered film, adhesive tape coating, plastic extrusion sheet production, and cast film production, cooling rollers play a crucial role. Their main function is to cool and shape the materials on the production line to meet the requirements of subsequent processing or finished product quality.

[0003] However, existing cooling rollers generally have some problems. On the one hand, when the cooling roller cools the material, the middle part of the roller in contact with the material heats up, while the temperature of the non-working areas at both ends of the roller easily drops below the dew point, leading to condensation. The condensate produced by condensation can cause materials such as paper to become damp, deformed, or even break, seriously affecting product quality and production efficiency. On the other hand, for longer cooling rollers, the coolant exchanges heat with the roller body first at the inlet end, making the coolant temperature at the outlet end significantly higher than that at the inlet. This creates a temperature slope on the cooling roller body, resulting in uneven cooling of the material and affecting the quality of the finished product.

[0004] To address these issues, some existing technologies employ methods such as increasing the width of the material to be cooled and subsequently cutting away areas contaminated by condensate, or sacrificing cooling efficiency by increasing the cooling water temperature to prevent condensation. However, these methods not only waste production materials and increase production costs but also reduce product quality. Therefore, a new cooling roller device is urgently needed to solve the problems of condensation and uneven cooling inherent in existing cooling rollers. Utility Model Content

[0005] To address the problems of condensation and uneven cooling in cooling rollers, this invention provides a cooling roller device to prevent condensation.

[0006] The purpose of this utility model is achieved in the following manner: a novel cooling roller device for preventing condensation, the cooling roller including a hollow outer shell 1, the outer shell 1 including a tube structure and end caps 11 for sealing at both ends of the tube structure, and an inner shell 2 disposed inside the outer shell 1, a cooling water cavity 4 formed between the outer shell 1 and the inner shell 2, a shaft 3 axially extending through the outer shell 1, the shaft 3 being fixedly connected to the outer shell 1, one end of the shaft 3 forming an inlet channel 31, one end of the inlet channel 31 being outside the outer shell 1 as a water inlet interface, the other end of the inlet channel 31 being provided with an inlet hole 32 penetrating the shaft 3, the inlet hole 32 being connected to the middle of the cooling water cavity 4 along the axial direction of the cooling roller; the other end of the shaft 3 forming an outlet channel 33, one end of the outlet channel 33 being outside the outer shell 1 as a water outlet interface, the other end of the outlet channel 33 being provided with an outlet hole 34 penetrating the shaft 3, the outlet hole 34 being connected to the cooling water cavity 4.

[0007] Furthermore, the inner shell 2 includes a first inner shell 21 and a second inner shell 22 that are sequentially fixedly connected to the shaft 3 along the axial direction. The gap between the first inner shell 21 and the adjacent end cap 11 forms a first disc-shaped water cavity 41; the gap between the first inner shell 21 and the second inner shell 22 forms a second disc-shaped water cavity 42; and the gap between the second inner shell 22 and the adjacent end cap 11 forms a third disc-shaped water cavity 43. The cooling water cavity 4 is connected to the first disc-shaped water cavity 41, the second disc-shaped water cavity 42, and the third disc-shaped water cavity 43, respectively. The water inlet 32 ​​is connected to the second disc-shaped water cavity 42, and the water outlet 34 is connected to the third disc-shaped water cavity 43.

[0008] Furthermore, the length difference between the first inner shell 21 and the second inner shell 22 along the axial direction is n, where n is less than or equal to 100 mm.

[0009] Furthermore, it also includes a heat spreader 5, which passes through the first inner shell 21 and the second inner shell 22 respectively, and is fixedly connected to the first inner shell 21 and the second inner shell 22 respectively. One end of the heat spreader 5 is connected to the first disc-shaped water cavity 41, and the other end of the heat spreader 5 is connected to the third disc-shaped water cavity 43.

[0010] Furthermore, there are at least two heat exchangers 5, and multiple heat exchangers 5 are arranged in a ring array along the outer side of the shaft 3.

[0011] Compared to existing technologies, this invention employs a centrally located internal water inlet, allowing the coolant to enter the inner wall of the roller from its central axis. The coolant then flows evenly within the cooling channels of the heat exchanger pipes on the inner wall of the roller, ensuring full contact with the roller wall and uniformly absorbing heat before flowing out. This method avoids temperature gradients on the cooling roller surface, ensuring uniform temperature distribution across the roller body, thus enabling uniform cooling of the material and improving the quality of the finished product. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the cooling roller assembly.

[0013] The components include an outer shell 1, an end cap 11, an inner shell 2, a first inner shell 21, a second inner shell 22, a shaft 3, a water inlet channel 31, a water inlet hole 32, a water outlet channel 33, a water outlet hole 34, a cooling water chamber 4, a first disc-shaped water chamber 41, a second disc-shaped water chamber 42, a third disc-shaped water chamber 43, and a heat spreader 5. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0016] As attached Figure 1As shown, a novel cooling roller device for preventing condensation includes a hollow outer shell 1. The outer shell 1 includes a tubular structure and end caps 11 for sealing at both ends, forming a hollow cylindrical structure. It also includes an inner shell 2 disposed within the outer shell 1, forming a cooling water chamber 4 between the outer shell 1 and the inner shell 2. A shaft 3 is axially inserted through the outer shell 1, fixedly connected to and coaxial with the outer shell 1. One end of the shaft 3 forms a water inlet channel 31, with the other end located outside the outer shell 1 as a water inlet interface, which can be connected to a water inlet rotary joint. The other end of the shaft 31 is provided with a water inlet hole 32 that passes through the shaft 3. The water inlet hole 32 is connected to the middle of the cooling water cavity 4 along the axial direction of the cooling roller. Preferably, the water outlet end of the water inlet hole 32 is located in the middle of the outer shell 1 and / or the cooling water cavity 4. The other end of the shaft 3 forms a water outlet channel 33 inward. The water inlet channel 31 and the water outlet channel 33 are connected. That is, the structure of the shaft 3 between the water inlet channel 31 and the water outlet channel 33 is solid. One end of the water outlet channel 33 is located outside the outer shell 1 as a water outlet interface and can be connected to a water outlet rotary joint. The other end of the water outlet channel 33 is provided with a water outlet hole 34 that passes through the shaft 3. The water outlet hole 34 is connected to the cooling water cavity 4.

[0017] Furthermore, the inner shell 2 includes a first inner shell 21 and a second inner shell 22 that are sequentially fixedly connected to the shaft 3 along the axial direction. Preferably, both the first inner shell 21 and the second inner shell 22 are hollow cylindrical structures. Preferably, the first inner shell 21 and the second inner shell 22 are the same size and shape. The gap between the first inner shell 21 and the adjacent end cap 11 forms a first disc-shaped water cavity 41; the gap between the first inner shell 21 and the second inner shell 22 forms a second disc-shaped water cavity 42; and the gap between the second inner shell 22 and the adjacent end cap 11 forms a third disc-shaped water cavity 43. The cooling water cavity 4 is connected to the first disc-shaped water cavity 41, the second disc-shaped water cavity 42, and the third disc-shaped water cavity 43, respectively. The water inlet 32 ​​is connected to the second disc-shaped water cavity 42, and the water outlet 34 is connected to the third disc-shaped water cavity 43.

[0018] Furthermore, the length difference between the first inner shell 21 and the second inner shell 22 along the axial direction is n, where n is less than or equal to 100mm. This limitation restricts the position of the second disc-shaped water cavity 42 used for water outlet to be located in the middle of the cooling water cavity 4 or offset from the middle by ±100mm. In practice, the position of the second disc-shaped water cavity 42 can be adjusted by changing the length of the first inner shell 21 and the second inner shell 22 according to the actual usage.

[0019] Furthermore, it also includes a heat spreader 5, which passes through the first inner shell 21 and the second inner shell 22 respectively, and is fixedly connected to the first inner shell 21 and the second inner shell 22 respectively. One end of the heat spreader 5 is connected to the first disc-shaped water cavity 41, and the other end of the heat spreader 5 is connected to the third disc-shaped water cavity 43. Preferably, there are at least two heat spreaders 5, and multiple heat spreaders 5 are arranged in a ring array along the outer side of the shaft 3.

[0020] Furthermore, a turbulence structure can be provided inside the cooling water cavity 4, such as turbulence plates or turbulence protrusions on the inner wall of the outer shell 1 or the outer wall of the inner shell 2, to enhance the heat exchange efficiency between the coolant and the roller.

[0021] Preferably, the inner shell 2 and the heat spreader 5 are both made of high thermal conductivity materials.

[0022] Assembly Process: First, install the first inner shell 21 and the second inner shell 22 inside the outer shell 1 according to the design requirements, ensuring that the first inner shell 21 and the second inner shell 22 are arranged along the length of the outer shell 1, and that the pipe walls of the first inner shell 21 and the second inner shell 22 maintain a uniform gap with the inner wall of the outer shell 1 to form a cooling water chamber 4 as a coolant flow channel. Then, connect the internal pipes to the inlet of the rotary joint, and pass the internal pipes through the end caps, sealing them to one end of the water inlet channel 31 to ensure no coolant leakage during transport. Next, install the end caps 11 at both ends of the roller body, ensuring a good seal between the end caps 11 and the roller body. Finally, install the rotary joint on the end caps 11 and connect the outlet pipes, completing the assembly of the entire cooling roller device.

[0023] Working process: When the cooling roller device starts working, the coolant enters the water inlet channel 31 from the rotary joint, and flows into the second disc-shaped water chamber 42 through the water inlet hole 32 via the internal pipe located at the central axis of the roller body. Made of a highly thermally conductive material, the coolant can quickly absorb the transferred heat during its flow. Subsequently, the coolant flows out from the cooling water chamber 4 between the inner shell 2 and the inner wall of the outer shell 1. During the outflow process, the coolant continuously exchanges heat with the outer shell 1, carrying away the heat from the outer shell 1. Finally, the heated coolant is discharged from the water outlet hole 34 to the water outlet channel 33, completing one cooling cycle. Inside the cooling water chamber 4, the turbulence structure (such as turbulence plates or turbulence protrusions) complicates the flow path of the coolant, increasing the contact time and contact area between the coolant and the outer shell 1, thereby enhancing heat exchange efficiency and improving the cooling effect.

[0024] In actual production, the type, flow rate, and temperature of the coolant can be rationally selected based on factors such as material characteristics, production process requirements, and the size of the cooling rollers to achieve the best cooling effect. Simultaneously, regular maintenance and inspection of the cooling roller assembly are essential to ensure the normal operation of all components and to promptly clean any impurities and dirt that may appear in the coolant flow channels, thus guaranteeing cooling efficiency and product quality stability.

[0025] This invention, by setting a heat equalization pipe inside the roller body, can quickly transfer the heat generated in the area in contact with the material (i.e., the middle of the roller body) to both ends of the roller body, thereby raising the temperature at both ends of the roller body. This avoids condensation caused by excessively low temperatures, ensures product quality, reduces the adverse effects of condensation on the material, and lowers the defect rate in the production process.

[0026] The cooling system employs a centrally located water inlet within the internal piping, allowing the coolant to enter the inner wall of the roller from its central axis. It then flows evenly through the cooling channels in the heat exchange pipes within the inner wall of the roller, ensuring full contact with the roller wall and uniformly absorbing heat before flowing out. This method avoids temperature gradients on the cooling roller surface, ensuring uniform temperature distribution and thus enabling even cooling of the material, thereby improving the quality of the finished product.

[0027] By incorporating a turbulence structure within the coolant flow channel, the heat exchange efficiency between the coolant and the roller is further enhanced. This allows the heat on the roller to be carried away more quickly, improving cooling efficiency and contributing to increased production efficiency to meet the needs of large-scale industrial production.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A novel cooling roller device for preventing condensation, the cooling roller comprising a hollow outer shell (1), the outer shell (1) comprising a tube structure and end caps (11) for sealing at both ends of the tube structure, and further comprising an inner shell (2) disposed within the outer shell (1), wherein a cooling water cavity (4) is formed between the outer shell (1) and the inner shell (2), characterized in that: A shaft (3) is provided through the outer shell (1) along the axial direction. The shaft (3) is fixedly connected to the outer shell (1). One end of the shaft (3) forms a water inlet channel (31) inward. One end of the water inlet channel (31) is located outside the outer shell (1) as a water inlet interface. The other end of the water inlet channel (31) is provided with a water inlet hole (32) that penetrates the shaft (3). The water inlet hole (32) is connected to the middle of the cooling water chamber (4) along the axial direction of the cooling roller. The other end of the shaft (3) forms a water outlet channel (33) inward. One end of the water outlet channel (33) is located outside the outer shell (1) as a water outlet interface. The other end of the water outlet channel (33) is provided with a water outlet hole (34) that penetrates the shaft (3). The water outlet hole (34) is connected to the cooling water chamber (4).

2. The novel cooling roller device for preventing condensation as described in claim 1, characterized in that: The inner shell (2) includes a first inner shell (21) and a second inner shell (22) that are fixedly connected to the shaft (3) along the axial direction. The gap between the first inner shell (21) and the adjacent end cap (11) forms a first disc-shaped water cavity (41); the gap between the first inner shell (21) and the second inner shell (22) forms a second disc-shaped water cavity (42); the gap between the second inner shell (22) and the adjacent end cap (11) forms a third disc-shaped water cavity (43). The cooling water cavity (4) is connected to the first disc-shaped water cavity (41), the second disc-shaped water cavity (42), and the third disc-shaped water cavity (43) respectively; the water inlet (32) is connected to the second disc-shaped water cavity (42); and the water outlet (34) is connected to the third disc-shaped water cavity (43).

3. The novel cooling roller device for preventing condensation as described in claim 2, characterized in that: The length difference between the first inner shell (21) and the second inner shell (22) along the axial direction is n, where n is less than or equal to 100 mm.

4. A novel cooling roller device for preventing condensation as described in claim 2, characterized in that: It also includes a heat spreader (5), which passes through the first inner shell (21) and the second inner shell (22) respectively, and is fixedly connected to the first inner shell (21) and the second inner shell (22) respectively. One end of the heat spreader (5) is connected to the first disc-shaped water cavity (41), and the other end of the heat spreader (5) is connected to the third disc-shaped water cavity (43).

5. A novel cooling roller device for preventing condensation as described in claim 4, characterized in that: There are at least two heat exchangers (5), and multiple heat exchangers (5) are arranged in a ring array along the outer side of the shaft (3).

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