Coated paper calendering equipment and air-cooling heat dissipation device thereof

Abstract

The utility model provides coated paper calendering equipment and an air cooling heat dissipation device thereof.The air cooling heat dissipation device comprises an air supply unit, an air pipe and a temperature sensor, one end of the air pipe is connected with the air supply unit, and the air supply unit is used for providing cooling air for the air pipe; one end of the air pipe is arranged corresponding to a soft roller of the coated paper calender, the other end of the air pipe is arranged corresponding to the soft roller of the coated paper calender and is used for blowing cooling air out of the soft roller of the coated paper calender for air cooling, and the temperature sensor is arranged adjacent to an air outlet of the air pipe and is used for detecting the temperature of the soft roller. The air-cooling heat dissipation device provided by the embodiment of the utility model plays a cooling role in blowing cold air to cool the roll surface of the soft roll of the coated paper calender, and prevents bursting damage caused by high local temperature of the roll surface; the production efficiency can be improved, and the grinding maintenance time and cost of the soft roller can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking equipment, and in particular to a coated paper calendering equipment and an air-cooled heat dissipation device thereof. Background Art

[0002] With the emergence of a large amount of information and the different needs of various business activities and industrial products in modern society, various functional specialty papers have emerged. In the production of specialty paper, coating is undoubtedly the key production process link. In order to achieve a good coating effect, there is often a calendering process after coating to improve the smoothness of the paper surface and improve the uniformity of the transverse thickness of the paper. The calender is to use two or more rollers to press the paper. The calender composed of a soft roller and a hard roller is widely used in the production process of special coated paper. Special coated paper equipment allows the width of the coated base paper to vary within a certain range. When producing base paper with a small width, the edge of the calendering soft roller does not contact the paper outside the paper web, and the diameter of the soft roller surface outside the paper web is larger than that in the middle. When the width of the paper web increases from small to large, due to the large diameter of the soft roller surface at the edge, the pressure on the soft roller surface is large, which easily leads to high temperature and roll cracking of the soft roller surface at the edge of the paper due to the large local pressure. In order to prevent the edge of the calendering soft roller from overheating and causing cracks when the paper width is changed from small to large, the specialty paper industry often optimizes the coating order from large to small. When the paper width is changed from small to large, the calendering soft roller is stopped and replaced, and the replaced soft roller is ground. This practice can avoid the calendering soft roller from bursting and damage, but it affects production efficiency and increases the grinding cost of the calendering soft roller. Summary of the invention

[0003] A first aspect of an embodiment of the present application provides an air-cooled heat dissipation device for a coated paper calender, the air-cooled heat dissipation device comprising an air supply unit, an air duct and a temperature sensor, one end of the air duct is connected to the air supply unit, the air supply unit is used to provide cooling air to the air duct, the other end of the air duct is arranged corresponding to the soft roller of the coated paper calender, and is used to blow cooling air to the soft roller of the coated paper calender for air cooling, the temperature sensor is arranged adjacent to the air outlet of the air duct, and is used to detect the temperature of the soft roller.

[0004] In some embodiments, the air duct is provided with a plurality of air outlets at one end corresponding to the soft roller of the coated paper calender, and the plurality of air outlets are extended sequentially along the axis direction of the soft roller of the coated paper calender, and control valves are respectively provided on the plurality of air outlets so that the plurality of air outlets can be controlled individually.

[0005] In some embodiments, there are multiple temperature sensors, which are arranged in sequence along the axial direction of the soft roller of the coated paper calender and correspond to different positions of the soft roller in the axial direction, respectively, so as to detect the temperature of the soft roller at different positions in the axial direction.

[0006] In some embodiments, the air supply unit includes a fan, and an air outlet of the fan is connected to the air duct; the fan is a variable frequency fan, which can output different air volumes by changing the frequency under the control of a controller.

[0007] In some embodiments, the air supply unit further includes a pressure transmitter, which is disposed at an air outlet of the fan and is used to detect the air outlet pressure of the fan.

[0008] In some embodiments, the air supply unit further includes a filter, and the filter cover is disposed at the air inlet of the fan.

[0009] In some embodiments, the air-cooled heat dissipation device further includes a water cooling unit, which is connected to the air supply unit and is used to cool the air supply unit.

[0010] In some embodiments, the air-cooled heat dissipation device also includes a controller, which is electrically connected to the air supply unit, the water cooling unit and the temperature sensor, and is used to control the working status of the air supply unit, the water cooling unit and the temperature sensor.

[0011] In some embodiments, the air-cooling heat dissipation device further includes a reminder unit, which is connected to the controller and is configured to send a reminder signal according to an instruction of the controller.

[0012] In a second aspect, an embodiment of the present application provides a coated paper calendering device, which includes a coated paper calender and the air-cooling heat dissipation device described in the above embodiment, and the air-cooling heat dissipation device is used to air-cool the soft roller of the coated paper calender.

[0013] The air-cooled heat dissipation device provided in the embodiment of the present application plays a cooling role in blowing cold air to cool the roller surface of the soft roller of the coated paper calender, thereby preventing the roller surface from bursting and damaging due to high local temperature; it can improve production efficiency and reduce the grinding and maintenance time and cost of the soft roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic axial view of the overall structure of an embodiment of a coated paper calendering device of the present application;

[0016] Figure 2 yes Figure 1 A schematic front view of the structure of the coated paper calendering device in the embodiment;

[0017] Figure 3 yes Figure 1 A schematic side view of the structure of the coated paper calendering device in the embodiment. DETAILED DESCRIPTION

[0018] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0019] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] Please also read Figures 1 to 3 , Figure 1 It is a schematic axial view of the overall structure of an embodiment of a coated paper calendering device of the present application; Figure 2 yes Figure 1 A schematic front view of the structure of the coated paper calendering device in the embodiment; Figure 3 yes Figure 1 A side structural schematic diagram of a coated paper calendering device in an embodiment; the coated paper calendering device in this embodiment comprises a coated paper calender 100 and an air-cooled heat dissipation device 200.

[0022] Specifically, the coated paper calender 100 includes a driving device 110 and a calender roller 120. The driving device 110 is connected to the calender roller 120, and is used to drive the calender roller 120 to rotate, thereby realizing calendering of the paper 88. The calender roller 120 may include a pair of soft rollers 121 and hard rollers 122 that cooperate with each other. The air-cooling heat dissipation device 200 in the embodiment of the present application is mainly used to perform air cooling and heat dissipation on the soft roller 121.

[0023] Optionally, the air-cooled heat dissipation device 200 includes an air supply unit 210, an air duct 220, and a temperature sensor 230. One end of the air duct 220 is connected to the air supply unit 210, and the air supply unit is used to provide cooling air to the air duct 220. The other end of the air duct is arranged corresponding to the soft roller 121 of the coated paper calender 100, and is used to blow cooling air to the soft roller 121 of the coated paper calender 100 for air cooling. The temperature sensor 230 is arranged adjacent to the air outlet of the air duct 220, and is used to detect the temperature of the soft roller 121.

[0024] Among them, the air duct 220 in this embodiment is provided with a plurality of air outlets 221 at one end corresponding to the soft roller 121 of the coated paper calender, and the plurality of air outlets 221 are extended in sequence along the axial direction of the soft roller 121 of the coated paper calender, and the plurality of air outlets 221 are respectively provided with control valves 222 so that the air outlets 221 can be individually controlled.

[0025] Optionally, the number of the temperature sensors 230 in this embodiment can be multiple, and the multiple temperature sensors 230 are arranged in sequence along the axis direction of the soft roller 121 of the coated paper calender, and respectively correspond to different positions of the soft roller 121 in the axis direction, so as to detect the temperature of different positions of the soft roller 121 in the axis direction. Specifically, there can be multiple temperature detection heads, one of which is distributed every 3-10 cm in the horizontal direction of the roller surface, to detect the roller surface temperature.

[0026] Optionally, the air supply unit 210 includes a fan 211, and an air outlet of the fan 211 is connected to the air duct 220; the fan can be a variable frequency fan, and the fan 211 can output different air volumes by changing the frequency under the control of the controller 240.

[0027] The air supply unit 210 further includes a pressure transmitter 212, which is disposed at the air outlet of the fan 210 and is used to detect the air outlet pressure of the fan 211. In addition, the air supply unit 210 further includes a filter 213, which is disposed at the air inlet of the fan 211 to filter the air drawn in and prevent large particles of dust and other debris from entering the fan 211.

[0028] Optionally, the air-cooled heat dissipation device 200 in the embodiment of the present application further includes a water cooling unit 250, which is connected to the air supply unit 210 and is used to cool the air supply unit 210. The water cooling unit 250 may specifically include a cooler 251, a temperature detector 252, a control valve 253, and a cold water circulation pipeline 254. The cooler 251 is connected to the air supply unit 210 through the cold water circulation pipeline 254, the control valve 253 is arranged on the cold water circulation pipeline 254, the temperature detector 252 is arranged on the fan 211 of the air supply unit 210, and the air supply unit 210 is cooled and cooled using cooling water, wherein the cooling water temperature may be between 5-10°.

[0029] Among them, the air-cooled heat dissipation device in this embodiment also includes a reminder unit 260, which is connected to the controller 240, and the reminder unit 260 is used to send a reminder signal according to the instruction of the controller 240. Optionally, the reminder unit 260 may include an alarm light, a speaker, etc., which are not specifically limited here. The controller 240 (which may be a PLC controller) is also electrically connected to the air supply unit 210, the water cooling unit 250 and the temperature sensor 230, respectively, for controlling the working status of the air supply unit 210, the water cooling unit 250 and the temperature sensor 230.

[0030] The working process of the air-cooling heat dissipation device in the embodiment of the present application is as follows:

[0031] First, start the controller (the start button of the cooling device on the touch screen); then start the variable frequency fan and set the wind pressure value at the fan outlet. When the fan outlet pressure is greater than the set value, the variable frequency fan power is automatically adjusted down. Conversely, when the fan outlet pressure is less than the set value, the variable frequency fan power is automatically adjusted up. The fan outlet pressure value is generally set at 2-5bar. Set the temperature value of the cooler outlet air. When the outlet air temperature is greater than the set value, the cooling water control valve opening is automatically adjusted up. Conversely, when the outlet air temperature is less than the set value, the cooling water control valve opening is automatically adjusted down. The outlet air temperature is generally set at 16-25°. The temperature detected by each roller surface temperature sensor is compared with the roller surface temperature in the middle. When the roller surface temperature at a certain position is 3° higher than the middle position (this temperature difference can be set and revised in the program), the control valve on the air duct at that position automatically opens to blow air to cool the roller surface at this position. Conversely, the control valve is closed and no cooling is required. When the temperature difference between a certain position of the roller surface and the middle position is greater than the maximum allowable value, it means that the local temperature of the roller surface at that position is too high, and the roller surface may burst. In order to protect the roller surface, the calender pressure zone is automatically disconnected. The difference between the detection temperature and the temperature at the middle position is set with two alarm points. When the temperature difference reaches a certain value (between 10-15°), the yellow alarm is controlled (realized by the reminder unit) to remind the operator to adjust. The adjustment directions are: lowering the cooler outlet air temperature and increasing the fan air volume. When the temperature difference reaches a certain value (20-30°), the red alarm is controlled and the calender is automatically disconnected to prevent the roller surface from bursting due to excessive temperature.

[0032] The air-cooled heat dissipation device used for the coated paper calender in the embodiment of the present application effectively solves the problem of the roller surface bursting due to the high local roller surface temperature. The paper width of the special paper coating machine fluctuates greatly. When the small width paper is changed to a large width paper, because the edge of the calender roller has not been in contact with the paper surface before, the diameter of the edge roller surface is large. When the paper width is changed to a large width, the edge pressure is large, and the temperature of the edge roller surface increases, causing the rubber layer to burst. Special paper practitioners often arrange to stop the machine to replace the calender soft roller when changing from a small width to a large width. On the one hand, it affects production efficiency. On the other hand, the replaced calender soft roller needs to be ground, which increases maintenance costs. The use of the air-cooled heat dissipation device structure in the embodiment of the present application can not only avoid the problem of the calender soft roller paper edge bursting, but also reduce the downtime for roller replacement and reduce the calender roller grinding and maintenance costs.

[0033] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An air-cooled heat sink for a coated paper calender, characterized in that: The air-cooled heat dissipation device includes an air supply unit, an air duct and a temperature sensor. One end of the air duct is connected to the air supply unit, and the air supply unit is used to provide cooling air to the air duct. The other end of the air duct is arranged corresponding to the soft roller of the coated paper calender, and is used to blow cooling air to the soft roller of the coated paper calender for air cooling. The temperature sensor is arranged adjacent to the air outlet of the air duct and is used to detect the temperature of the soft roller.

2. The air-cooling heat dissipation device according to claim 1, characterized in that: The air duct is provided with a plurality of air outlets at one end corresponding to the soft roller of the coated paper calender, and the plurality of air outlets are extended in sequence along the axis direction of the soft roller of the coated paper calender, and control valves are respectively provided on the plurality of air outlets so that the plurality of air outlets can be controlled individually.

3. The air-cooling heat dissipation device according to claim 2, characterized in that: There are multiple temperature sensors, which are arranged in sequence along the axial direction of the soft roller of the coated paper calender and correspond to different positions of the soft roller in the axial direction, so as to detect the temperature of different positions of the soft roller in the axial direction.

4. The air-cooling heat dissipation device according to claim 1, characterized in that: The air supply unit comprises a fan, and an air outlet of the fan is connected to the air duct; the fan is a variable frequency fan, and can output different air volumes by changing the frequency under the control of a controller.

5. The air-cooling heat dissipation device according to claim 4, characterized in that: The air supply unit further comprises a pressure transmitter, which is arranged at the air outlet of the fan and is used to detect the air outlet pressure of the fan.

6. The air-cooling heat dissipation device according to claim 4, characterized in that: The air supply unit also includes a filter, and the filter is covered at the air inlet of the fan.

7. The air-cooling heat dissipation device according to claim 1, characterized in that: The air-cooled heat dissipation device also includes a water cooling unit, which is connected to the air supply unit and is used to cool the air supply unit.

8. The air-cooling heat dissipation device according to claim 7, characterized in that: The air-cooled heat dissipation device also includes a controller, which is electrically connected to the air supply unit, the water cooling unit and the temperature sensor, and is used to control the working states of the air supply unit, the water cooling unit and the temperature sensor.

9. The air-cooling heat dissipation device according to claim 8, characterized in that: The air-cooling heat dissipation device further comprises a reminder unit, which is connected to the controller and is used for sending a reminder signal according to an instruction of the controller.

10. A coated paper calendering device, characterized in that: The coated paper calendering equipment comprises a coated paper calender and the air-cooling heat dissipation device according to any one of claims 1 to 9, wherein the air-cooling heat dissipation device is used for air-cooling and heat dissipation of the soft roller of the coated paper calender.

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