Press roll cooling device

Abstract

The utility model discloses a press roll cooling device, including fitting mechanism and liquid cooling mechanism, fitting mechanism includes two opposite bearing piece and driving component, the bearing piece is provided with the fitting surface relative to the other bearing piece side, the fitting surface is used for approaching the press roll surface, driving component is used for driving the two bearing piece to approach or leave away, and the driving component is used for driving the two bearing piece to approach or leave away from the press roll surface. The liquid cooling mechanism comprises a plurality of heat exchange pipelines, the heat exchange pipelines are arranged on the binding face and used for being filled with cooling liquid, and the technical problem that cooling is not uniform in an existing compression roller cooling device is solved.

Description

Technical Field

[0001] This utility model relates to the field of pressure roller cooling technology, and in particular to a pressure roller cooling device. Background Technology

[0002] In the thermal compounding process, the pressure roller is one of the key components, and its surface temperature directly affects the quality of the composite material. Traditional thermal compounding rolling processes mainly rely on natural cooling or simple spray cooling methods for temperature reduction. Natural cooling depends on the ambient temperature gradient to dissipate heat, but its cooling rate is slow and uncontrollable, which can easily lead to local phase changes in the material, affecting the uniformity of the finished product. At the same time, the excessively long cooling cycle severely restricts production efficiency.

[0003] While simple spray cooling can accelerate heat dissipation through an external medium, it is limited by the spray coverage area, uneven water flow distribution, and the dynamic contact characteristics between the medium and the material surface. This can easily lead to a significant temperature gradient between the material surface and its interior, inducing problems such as non-uniform shrinkage, residual stress concentration, and even micro-cracks. Furthermore, the large water consumption of spraying may result in residual moisture on the material surface, affecting the stability of subsequent processes.

[0004] Therefore, there is an urgent need for an efficient and uniform cooling device to optimize the hot composite rolling process and improve product quality and production efficiency. Utility Model Content

[0005] One objective of this invention is to provide a pressure roller cooling device that addresses the technical problem of uneven cooling in existing pressure roller cooling equipment.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a pressure roller cooling device, which includes a bonding mechanism, comprising two opposing support members and a driving assembly, wherein the support members have a bonding surface on one side opposite to the other support member, the bonding surface being used to approach the pressure roller surface, and the driving assembly being used to drive the two support members to approach or move away from each other; and a liquid cooling mechanism, comprising multiple heat exchange pipes, the multiple heat exchange pipes being disposed on the bonding surface, and the heat exchange pipes being used to fill coolant.

[0007] Optionally, the heat exchange pipes extend along the length of the load-bearing component, and multiple heat exchange pipes are distributed in parallel at equal intervals.

[0008] Optionally, the mating surface is arc-shaped, the center distance between adjacent heat exchange pipes is 1 / 200 to 1 / 100 of the corresponding diameter of the mating surface, and the total area covered by the heat exchange pipes accounts for 75% to 100% of the total area of ​​the mating surface.

[0009] Optionally, the heat exchange pipe has multiple protrusions on the side away from the load-bearing component.

[0010] Optionally, the heat exchange pipes are flexible hoses.

[0011] Optionally, the liquid cooling mechanism also includes a return pipe, a return pump, and a refrigeration device. The return pipe connects the two ends of the heat exchange pipe to form a closed circuit. The return pipe is equipped with a return pump to drive the flow of coolant. The refrigeration device is located in the return pipe to reduce the temperature of the coolant.

[0012] Optionally, the liquid cooling mechanism also includes a liquid storage tank, which is located in the return pipe and has a liquid exchange port.

[0013] Optionally, a heat insulation layer is provided on the inner wall of the return pipe.

[0014] Optionally, the liquid cooling mechanism also includes a control valve located in the return pipe and near the liquid inlet of the heat exchange pipe.

[0015] Optionally, the pressure roller cooling device also includes a control component; the control component includes a temperature sensor and a control center, the temperature sensor is used to monitor the temperature of the pressure roller, and the control center adjusts the control valve according to the temperature information to regulate the flow rate in the heat exchange pipe.

[0016] The beneficial effects of this utility model are as follows:

[0017] Unlike existing spray cooling or natural cooling equipment, the pressure roller cooling device provided by this invention combines heat exchange pipes with the contact surface, allowing the heat exchange pipes to fit tightly against the pressure roller surface, thereby achieving a more direct and thorough heat exchange effect. The heat transfer effect of the coolant covers the entire pressure roller surface, effectively improving heat exchange efficiency and reducing problems caused by local overheating or uneven cooling. The coolant in the heat exchange pipes is in a continuous flow state, enabling it to quickly absorb and carry away the heat from the pressure roller surface, achieving a continuous and efficient cooling effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a pressure roller cooling device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the support block structure provided in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of a heat exchange pipeline provided in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the liquid cooling mechanism and adjustment components provided in an embodiment of the present invention.

[0023] Explanation of icon numbers:

[0024] 10. Lamination mechanism; 11. Receiving component; 111. Lamination surface; 12. Drive assembly; 20. Liquid cooling mechanism; 21. Heat exchange pipe; 211. Protrusion; 22. Return pipe; 221. Insulation layer; 23. Return pump; 24. Refrigeration device; 25. Liquid storage tank; 251. Liquid exchange port; 26. Control valve; 30. Regulation assembly; 31. Temperature sensor; 32. Control center; 40. Pressure roller. Detailed Implementation

[0025] 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.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0027] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0028] Please see Figure 1 , Figure 1 This is a schematic diagram of a pressure roller cooling device provided in an embodiment of the present invention.

[0029] This utility model provides a pressure roller cooling device, which aims to alleviate the problem of uneven heat dissipation in existing pressure roller 40 cooling equipment and improve cooling efficiency and temperature control uniformity. Specifically, the pressure roller cooling device includes a bonding mechanism 10 and a liquid cooling mechanism 20.

[0030] The bonding mechanism 10 ensures that the cooling device can tightly adhere to the surface of the pressure roller 40 to improve heat exchange efficiency. The bonding mechanism 10 includes two opposing support members and a drive assembly 12. The inner side of each support member has a bonding surface 111, which can approach and tightly contact the surface of the pressure roller 40 to ensure stable cooling performance. The drive assembly 12 adjusts the relative position of the two support members to accommodate pressure rollers 40 of different diameters and provides enveloping cooling of the pressure roller 40 when needed. The drive assembly 12 can be driven by an electric push rod, a pneumatic cylinder, or a hydraulic cylinder to ensure automatic adjustment and maintain stable bonding pressure, thereby enhancing heat exchange efficiency.

[0031] The liquid cooling mechanism 20 provides efficient cooling during the bonding process, preventing heat buildup on the pressure roller 40 due to prolonged operation from affecting processing accuracy. The liquid cooling mechanism 20 includes heat exchange pipes 21 and coolant. Multiple heat exchange pipes 21 are evenly distributed within the bonding surface 111, ensuring the coolant fully covers the entire contact area. The heat exchange pipes 21 can be arranged in a strip, curved, or mesh pattern to increase the heat conduction area and cooling efficiency. The heat exchange pipes 21 are filled with coolant, such as water coolant, ethylene glycol coolant, or other cooling media with excellent thermal conductivity. The coolant flows within the pipes, rapidly carrying away heat and effectively reducing the temperature of the pressure roller 40.

[0032] In this embodiment, the cooling device is installed outside the pressure roller 40, and the two carrier members are controlled by the drive assembly 12 to move closer to the pressure roller 40, so that the heat exchange pipe 21 on the contact surface 111 is in close contact with the surface of the pressure roller 40. The coolant in the heat exchange pipe 21 flows, quickly absorbing and carrying away the heat from the surface of the pressure roller 40, thereby achieving uniform and efficient cooling. Compared with traditional spray cooling or natural cooling methods, the pressure roller cooling device provided by this utility model has the advantages of efficient and uniform cooling, strong adjustability and adaptability, and stability and reliability. The contact surface 111 combined with the heat exchange pipe 21 in close contact with the surface of the pressure roller 40 allows the coolant to fully act on the entire pressure roller 40, improving heat exchange efficiency. The drive assembly 12 can adjust the position of the carrier members according to the size of the pressure roller 40, and is suitable for pressure rollers 40 of different specifications, with strong versatility.

[0033] Further, please refer to Figure 2 , Figure 2 This is a schematic diagram of the support block structure provided in an embodiment of the present invention. In some embodiments, in order to improve the cooling effect and ensure the uniformity of temperature distribution, the heat exchange pipe 21 extends along the length direction of the support member, so that the coolant can flow efficiently throughout the entire contact area to achieve continuous heat exchange. Figure 2The X direction shown is the length direction of the bearing component. Specifically, multiple heat exchange pipes 21 are arranged in parallel within the contact surface 111, with adjacent heat exchange pipes 21 maintaining equal spacing. This arrangement helps avoid cooling dead zones, ensuring that the entire surface of the pressure roller 40 is cooled uniformly and reducing the problem of excessively high local temperatures.

[0034] Furthermore, the parallel and equidistant distribution of the coolant optimizes its flow path, ensuring a stable and uniform flow velocity within the heat exchange pipes 21. This prevents localized areas from experiencing excessively fast or slow coolant flow rates, which could negatively impact heat dissipation. Simultaneously, it reduces thermal interference between pipes, ensuring each heat exchange pipe 21 functions independently and improving overall heat exchange efficiency.

[0035] In practical implementation, the number and spacing of heat exchange pipes 21 can be rationally designed according to the size of the pressure roller 40 and the cooling requirements. For example, for a larger diameter pressure roller 40, the number of heat exchange pipes 21 can be appropriately increased to cover a wider cooling area. For high-precision machining scenarios, the cooling temperature can be more evenly distributed by optimizing the pipe spacing, thereby reducing machining errors caused by uneven thermal expansion and contraction.

[0036] In some optimized embodiments, to better adapt to the shape of the pressure roller 40 and improve the cooling effect, the contact surface 111 is designed in an arc shape, allowing it to fit more tightly against the surface of the pressure roller 40, reducing contact gaps and improving heat exchange efficiency. Furthermore, the arc-shaped contact surface 111 ensures that the cooling device is subjected to uniform force during operation, while enhancing the heat exchange capacity between the coolant and the surface of the pressure roller 40, thereby accelerating the cooling process and improving cooling uniformity.

[0037] Furthermore, to ensure a reasonable distribution of the heat exchange pipes 21, the center-to-center distance between adjacent heat exchange pipes 21 is controlled between 1 / 200 and 1 / 100 of the diameter of the contact surface 111. A smaller center-to-center distance helps to increase cooling density, suitable for high-temperature conditions or applications requiring rapid cooling, while a larger center-to-center distance is suitable for ordinary cooling needs, ensuring cooling effect while reducing manufacturing costs. By setting the spacing within this range, this application can ensure sufficient cooling coverage while avoiding excessive concentration of pipes, which could lead to reduced fluid flow rate or uneven heat dissipation.

[0038] Meanwhile, the heat exchange pipes 21 cover 75% to 100% of the total area of ​​the mating surface 111, meaning that the heat exchange pipes 21 almost completely cover the mating surface 111, thereby maximizing the cooling effect. At 75% coverage, the cooling requirements of general industrial production can be met, while at 100% coverage, there are almost no uncooled areas on the mating surface 111, making it suitable for high-precision, high-heat-load applications, such as high-speed rotating pressure rollers 40 or processes with extremely high temperature control requirements.

[0039] Further, please refer to Figure 3 , Figure 3 This is a partial schematic diagram of a heat exchange pipe 21 provided in an embodiment of the present invention. To further improve heat exchange efficiency and optimize cooling performance, in this embodiment, multiple protrusions 211 are provided on the side of the heat exchange pipe 21 away from the support member. The main function of these protrusions 211 is to form a larger contact area between the heat exchange pipe 21 and the surface of the pressure roller 40, thereby enhancing the heat exchange effect and improving cooling efficiency.

[0040] Specifically, the protrusions 211 can be arranged in a uniform distribution, and their shapes can be hemispherical, prismatic, corrugated, or other highly efficient heat-conducting structures to increase fluid turbulence, making the coolant flow more uniformly in the pipe and reducing problems such as local overheating or uneven cooling. The height and spacing of the protrusions 211 can be optimized according to heat exchange requirements to effectively increase the heat exchange area without affecting the normal flow of coolant.

[0041] In this embodiment, by providing the protrusions 211, the heat exchange pipe 21 can not only make more full contact with the surface of the pressure roller 40, avoiding localized poor cooling, but also enhance the fluidity of the coolant to a certain extent, promoting rapid heat transfer. Furthermore, due to the presence of the protrusions 211, the coolant generates a micro-turbulence effect when flowing through the heat exchange pipe 21. This flow pattern helps break the liquid boundary layer, improves the overall heat transfer coefficient, and makes the cooling effect more uniform and stable. This ensures that the pressure roller 40 can maintain a suitable operating temperature even under high load operation, improving production efficiency and processing quality.

[0042] In some optimized embodiments, to improve the adaptability and ease of installation of the cooling device, the heat exchange pipe 21 adopts a flexible hose structure. Compared with traditional rigid pipes, the flexible hose structure has greater flexibility and adjustability, and can better conform to the surface of pressure rollers 40 with different diameters and shapes, thereby improving the heat exchange effect. At the same time, the flexible hose structure can reduce stress concentration caused by equipment vibration or mechanical displacement, extend the service life of the heat exchange pipe 21, and improve the stability of the cooling system.

[0043] Specifically, the flexible hose can be made of materials with high thermal conductivity, such as metal corrugated pipes, high-strength silicone tubes, composite thermally conductive rubber tubes, or high-temperature resistant plastic tubes, to ensure efficient heat conduction during cooling and withstand temperature changes and mechanical loads during long-term operation. Compared to rigid pipes, flexible hoses have better flexibility and cushioning characteristics, and can adapt to the slight deformation of the pressure roller 40 surface during contact, avoiding scratches, wear, or surface stress concentration problems caused by direct contact with excessively hard materials, thereby extending the service life of the pressure roller 40 and maintaining its surface precision.

[0044] Meanwhile, because the hose can deform moderately when squeezed, a closer contact is formed between the heat exchange pipe 21 and the surface of the pressure roller 40. This deformation not only increases the actual contact area and improves the heat exchange efficiency per unit area, but also reduces the presence of tiny gaps, preventing air layers from affecting heat conduction.

[0045] Further, please refer to Figure 4 , Figure 4 This is a schematic diagram of the liquid cooling mechanism 20 and the adjustment components provided in this embodiment of the present invention. The liquid cooling mechanism 20 also includes a return pipe 22, a return pump 23, and a refrigeration device 24 to construct a closed cooling circulation system, thereby improving heat exchange efficiency and ensuring that the coolant remains at a low temperature throughout the cooling process.

[0046] The return pipe 22 connects the inlet and outlet of the heat exchange pipe 21, forming a closed cooling loop. This allows the coolant to circulate continuously within the system, preventing a decrease in cooling efficiency due to coolant consumption or loss. The return pump 23, the core power component of the liquid cooling system, is located in the return pipe 22 and drives the coolant to circulate within the heat exchange pipe 21, continuously removing heat from the surface of the pressure roller 40. The flow rate and pressure of the return pump 23 can be adjusted according to cooling requirements to adapt to heat dissipation needs under different operating conditions.

[0047] The refrigeration unit 24 is installed in the return pipe 22 to reduce the temperature of the coolant, ensuring that the coolant reaches an ideal cooling state before entering the heat exchange pipe 21, thereby improving the overall heat dissipation capacity. The refrigeration unit 24 can employ compressor refrigeration, thermoelectric refrigeration, or liquid nitrogen cooling, etc., and a suitable cooling solution can be selected according to different industrial application requirements.

[0048] In this embodiment, through the synergistic action of the return pipe 22, the return pump 23, and the refrigeration device 24, the entire liquid cooling mechanism 20 forms a highly efficient closed-loop cooling system, ensuring that the coolant remains within its optimal temperature range, improving heat dissipation efficiency, and extending the service life of the pressure roller 40. Compared to traditional single-spray cooling or natural heat dissipation methods, this liquid cooling system provides more stable and controllable temperature regulation capabilities, meeting the demands of high-precision and high-efficiency production, while reducing energy waste and improving the reliability and economy of equipment operation.

[0049] In some optimized embodiments, the liquid cooling mechanism 20 further includes a coolant reservoir 25, which is disposed in the return pipe 22 and serves as the storage and management center for the coolant. The main function of the coolant reservoir 25 is to store coolant and provide additional coolant replenishment to ensure that the system always has sufficient cooling capacity during long-term operation and to prevent a decrease in cooling efficiency due to coolant evaporation, leakage, or degradation.

[0050] The coolant reservoir 25 is typically made of corrosion-resistant, high-strength materials, such as stainless steel, aluminum alloy, or polymer composites, to ensure long-term stable operation in various industrial environments and resist potential chemical corrosion from the coolant. Depending on the application requirements, the coolant reservoir 25 can be equipped with a level monitoring sensor to detect the coolant level in real time. When the level falls below a set value, the system can automatically issue a replenishment alarm or trigger an automatic replenishment mechanism to prevent insufficient coolant from affecting heat exchange efficiency.

[0051] To facilitate maintenance and coolant replacement, the coolant reservoir 25 is equipped with a coolant exchange port 251. The exchange port 251 allows for manual or automatic replenishment of new coolant and convenient drainage and replacement when the coolant is aged or ineffective. The exchange port 251 is typically equipped with a sealing cap or quick-connect valve to prevent dust, impurities, or external contaminants from entering the cooling system, thus maintaining the purity of the coolant.

[0052] Furthermore, in some embodiments, to reduce heat loss of the coolant due to ambient temperature and improve the overall efficiency of the cooling system, a heat insulation layer 221 is provided on the inner wall of the return pipe 22. The heat insulation layer 221 can effectively reduce the heat exchange between the coolant and the external environment during transportation, ensuring that the coolant maintains a low temperature when flowing through the return pipe 22, thereby improving the overall cooling effect.

[0053] The insulation layer 221 can utilize various high-efficiency insulation materials, such as microporous insulation coatings, vacuum insulation panels, aerogel composite layers, or polyurethane foam layers, to minimize heat conduction, convection, and radiation losses. Furthermore, the insulation layer 221 not only reduces heat loss but also prevents condensation. When the coolant temperature is significantly lower than the ambient temperature, condensation may form on the outer wall of ordinary pipes, affecting equipment operation and potentially causing moisture to penetrate other precision components. By installing the insulation layer 221 on the inner side of the pipe wall, this condensation effect caused by temperature differences can be effectively reduced, keeping the pipes dry and operating stably.

[0054] In this embodiment, a heat insulation layer 221 is provided on the inner side of the wall of the return pipe 22, which can not only effectively reduce the heat loss of the coolant and improve the energy efficiency of the cooling system, but also reduce condensation and enhance the durability of the pipe.

[0055] In some optimized embodiments, to further improve the fluid control accuracy of the liquid cooling system and achieve intelligent adjustment of the coolant flow rate, the liquid cooling mechanism 20 also includes a control valve 26. This control valve 26 is installed in the return pipe 22 and close to the inlet end of the heat exchange pipe 21. Its main function is to regulate the flow rate and pressure of the coolant entering the heat exchange pipe 21, maintain a stable coolant supply, and dynamically adjust according to actual cooling needs, thereby optimizing the overall heat exchange effect.

[0056] The control valve 26 can be of various types, including an electrically operated regulating valve, a pneumatically operated control valve 26, a proportional valve, or a manual valve, with the appropriate regulation method selected according to the application scenario. To improve control accuracy, the control valve 26 can be equipped with a flow sensor or a pressure sensor for real-time monitoring of coolant flow and pressure data in the pipeline.

[0057] To further enhance the intelligence of the pressure roller cooling device and achieve precise control of the cooling process, the cooling device also includes a control component 30. The main function of the control component 30 is to monitor and dynamically adjust the temperature of the pressure roller 40 in real time, enabling the cooling system to adjust the flow rate of the coolant according to actual needs, thereby achieving efficient and stable temperature management and avoiding overcooling or overheating from affecting the production process.

[0058] The control component 30 includes a temperature sensor 31 and a control center 32. The temperature sensor 31 is responsible for monitoring the temperature of the surface of the pressure roller 40 in real time and transmitting the collected temperature data to the control center 32. The temperature sensor 31 can employ various temperature measurement methods, such as thermocouples or infrared thermometers, and the appropriate sensor type can be selected according to different operating environments and accuracy requirements. For example, in the high-temperature, high-speed operation of the pressure roller 40 system, a non-contact infrared thermometer can be used to ensure the accuracy and real-time performance of temperature monitoring. For higher precision temperature control requirements, multi-point distributed thermocouples can be used, with temperature measurement points arranged at multiple locations on the surface of the pressure roller 40 to obtain more balanced and comprehensive temperature data.

[0059] As the core control unit of the entire cooling system, the control center 32 is responsible for receiving real-time data from the temperature sensor 31 and intelligently adjusting the coolant flow rate based on preset temperature thresholds and control algorithms. When the temperature sensor 31 detects that the temperature of the pressure roller 40 has risen above the set threshold, the control center 32 immediately sends a command to the control valve 26 to increase the coolant flow rate in the heat exchange pipe 21, accelerate the heat dissipation process, and quickly bring the temperature of the pressure roller 40 back to the normal range. Conversely, when the temperature drops to the set minimum threshold, the control center 32 reduces the coolant flow rate to prevent excessively low temperatures from affecting the processing quality of the material or causing thermal expansion and contraction problems.

[0060] In this embodiment, the addition of the control component 30 enables the pressure roller cooling device to possess intelligent temperature control capabilities. It can dynamically adjust the coolant flow rate based on the actual temperature changes of the pressure roller 40, ensuring that the temperature of the pressure roller 40 is always maintained within the ideal range. This not only improves cooling efficiency but also effectively reduces energy consumption, extends equipment lifespan, and enhances the stability and precision of the entire production process.

[0061] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A press roll cooling device, characterized by, The application relates to a cooling device for a compression roller, which comprises a fitting mechanism and a liquid cooling mechanism. The fitting mechanism comprises two bearing parts arranged oppositely and a driving assembly, one side of the bearing part is provided with a fitting surface for approaching the surface of the compression roller, and the driving assembly is used for driving the two bearing parts to approach or move away from each other. The liquid cooling mechanism comprises a plurality of heat exchange pipes arranged on the fitting surface, and the heat exchange pipes are used for filling cooling liquid.

2. A press roll cooling device according to claim 1, characterized in that The heat exchange pipes extend along the length direction of the bearing part, and the plurality of heat exchange pipes are arranged in parallel and at equal intervals.

3. A press roll cooling device according to claim 2, characterised in that The fitting surface is in the shape of a circular arc, the center distance between adjacent heat exchange pipes is 1 / 200 to 1 / 100 of the corresponding diameter of the fitting surface, and the total area covered by the heat exchange pipes accounts for 75% to 100% of the total area of the fitting surface.

4. A press roll cooling device according to claim 3, characterised in that The side of the heat exchange pipe away from the bearing part is provided with a plurality of protrusions.

5. A press roll cooling device according to any one of claims 1 to 4, characterized in that The heat exchange pipe is in the structure of a flexible pipe.

6. A press roll cooling device according to any one of claims 1 to 4, characterized in that The liquid cooling mechanism further comprises a return pipe, a return pump and a refrigeration device, the return pipe is connected with both ends of the heat exchange pipe to form a closed passage, the return pipe is provided with the return pump to drive the cooling liquid to flow, and the refrigeration device is arranged in the return pipe and used for reducing the temperature of the cooling liquid.

7. A press roll cooling device according to claim 6, characterised in that The liquid cooling mechanism further comprises a liquid storage tank, the liquid storage tank is arranged in the return pipe, and the liquid storage tank is provided with a liquid exchange opening.

8. A press roll cooling device according to claim 6, characterised in that The inner side of the pipe wall of the return pipe is provided with a heat insulation layer.

9. A press roll cooling device according to claim 6, characterized in that The liquid cooling mechanism further comprises a control valve, the control valve is arranged in the return pipe and close to the liquid inlet end of the heat exchange pipe.

10. A press roll cooling device according to claim 9, characterized in that The compression roller cooling device further comprises a regulating assembly. The regulating assembly comprises a temperature sensor and a control center, the temperature sensor is used for monitoring the temperature of the compression roller, and the control center regulates the control valve according to the temperature information to regulate the flow in the heat exchange pipe.

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