Heating roller with regional temperature adjustment function

Abstract

The utility model relates to a heating roller for regional temperature adjustment, which comprises a streaming media circulation heating roller, and infrared temperature measuring probes are arranged above the streaming media circulation heating roller from one end of the streaming media circulation heating roller to the other end of the streaming media circulation heating roller along the axial direction at intervals. Induction heating coils which are the same as the infrared temperature measurement probes in number and correspond to the infrared temperature measurement probes in position are arranged below the streaming media circulation heating roller, a material thickness moving scanner is arranged adjacent to the streaming media circulation heating roller, and the infrared temperature measurement probes, the material thickness moving scanner and the induction heating coils are all connected with a controller. According to the heating roller, the surface of the roller body is divided into a plurality of temperature control areas, and each area is provided with an independent infrared temperature measuring probe and an induction heating coil, so that the heating roller can provide customized heat for different parts of a material, more precise temperature control is realized, and the drying requirements of different areas on the width of the material are met.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a heating roll, and especially to a heating roll with regional temperature adjustment. Background Art

[0002] In the production process of the paper industry, the streaming media heating roll is a crucial link, especially in the drying and calendering processes. It transfers heat through direct contact with the wet paper to achieve rapid and uniform drying. In addition, the streaming media heating roll also smooths the paper surface during the calendering process to ensure the quality and consistency of the product.

[0003] However, the traditional streaming media heating roll technology faces some challenges. For example, when using water, steam or heat-conducting oil as the heating medium, the roll body contains a complex spiral flow channel system, and its design and manufacturing process are a severe test of precision and durability. Quality parameters of the paper such as thickness, density, water content, etc. may change during the production process, which requires the heating roll to be able to adjust in a timely manner to adapt to these changes. However, the existing heating roll systems usually lack sufficient flexibility and response speed to cope with these changes.

[0004] In actual operation, in order to maintain the uniformity of the roll surface temperature, it is necessary to frequently debug and adjust the mold temperature controller. However, it is difficult for the mold temperature controller to achieve very fine temperature control for a roll surface with a width of several meters. Sometimes, during the temperature adjustment process of the roll body, repeated tests need to be carried out according to experience, which is not only inefficient but also increases the production cost.

[0005] Local temperature differences may cause incomplete drying of some areas of the paper, affecting the final quality and usability of the paper. This quality inconsistency is particularly prominent in the production of fine paper products, for example, in the production of printed matter, multi-layer material composites or special-purpose papers. Another challenge is that once production starts, if problems with the temperature distribution are found, it is very difficult to adjust. Usually, replacing or adjusting a large heating roll requires shutting down the machine, which is not only time-consuming and laborious but also may lead to a significant drop in production efficiency. Generally speaking, the existing streaming media heating roll systems need to precisely control the temperature and pressure to meet the requirements for high-quality and diversified products in paper production.

[0006] In the paper industry, the efficiency and performance of the streaming media heating roll directly affect the quality of the final product. However, the existing technologies have obvious limitations in temperature control, uniformity maintenance and adaptive adjustment. These limitations are particularly prominent when producing wide-width paper. Summary of the Invention

[0007] The object of the present utility model is to provide a heating roller with zoned temperature regulation, and the heating roller with zoned temperature regulation is intended to solve the technical problem in the prior art that it is difficult for a heating roller to adjust the temperatures of multiple zones of the heating roller in real time according to the material thickness.

[0008] A heating roller with zoned temperature regulation of the present utility model includes a streaming media circulation heating roller. At least two infrared temperature sensors are arranged at intervals along the axial direction from one end to the other end of the streaming media circulation heating roller above the streaming media circulation heating roller. Induction heating coils with the same number as the infrared temperature sensors and corresponding positions to the infrared temperature sensors are arranged from one end to the other end of the streaming media circulation heating roller below the streaming media circulation heating roller. A material thickness moving scanner is arranged adjacent to the streaming media circulation heating roller. The signal output ends of the infrared temperature sensors and the material thickness moving scanner and the control end of the induction heating coil are all connected to a controller.

[0009] Further, the streaming media circulation heating roller includes a roller body and a mold temperature controller. The inlet and outlet of the roller body are respectively connected to the outlet and inlet of the mold temperature controller through pipelines.

[0010] Compared with the prior art, the effects of the present utility model are positive and obvious. The present utility model divides the surface of the roller body into multiple temperature control zones, and each zone is equipped with an independent infrared temperature sensor and an induction heating coil, enabling the heating roller to provide customized heat for different parts of the material, thereby achieving more precise temperature control. The heating power of each control zone can be adjusted independently to meet the drying requirements of different zones in the width of the material, which helps to improve the quality of material production, reduce energy consumption, lower production costs, save the time and cost of repeated debugging and manual operation, and enhance the automation and intelligent level of the production line, having important market application prospects and industrial value. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of a heating roller with zoned temperature regulation of the present utility model. Detailed Embodiments

[0012] The present utility model will be further described below in conjunction with embodiments, but the present utility model is not limited to these embodiments. All similar structures and their similar variations using the present utility model shall be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and is not a limitation on the technical solution of the present utility model.

[0013] Such as Figure 1As shown in the figure, a heating roller with zoned temperature regulation according to the present utility model includes a streaming media circulation heating roller 1. Above the streaming media circulation heating roller 1, at least two infrared temperature sensors 2 are arranged at intervals along the axial direction from one end to the other end of the streaming media circulation heating roller 1. Below the streaming media circulation heating roller 1, induction heating coils 3 with the same number as the infrared temperature sensors 2 and corresponding positions to the infrared temperature sensors 2 are arranged from one end to the other end of the streaming media circulation heating roller 1. A material thickness moving scanner 4 is arranged adjacent to the streaming media circulation heating roller 1. The signal output ends of the infrared temperature sensors 2 and the material thickness moving scanner 4 and the control end of the induction heating coils 3 are all connected to a controller 5.

[0014] Further, the streaming media circulation heating roller 1 includes a roller body and a mold temperature controller. The inlet and outlet of the roller body are respectively connected to the outlet and inlet of the mold temperature controller through pipelines.

[0015] Specifically, the streaming media circulation heating roller 1, infrared temperature sensors 2, induction heating coils 3, material thickness moving scanner 4, controller 5, roller body, mold temperature controller, etc. in this embodiment all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0016] The working principle of this embodiment:

[0017] After the streaming media circulation heating roller 1 dries and calenders the material, the material thickness moving scanner 4 is used to scan and measure the material thickness, and the detection data is transmitted to the controller 5 for data zoning according to a preset area. When the material thickness in a certain area is inconsistent with the predetermined thickness, the controller 5 adjusts the induction heating coil 3 in the corresponding area to reduce or compensate the temperature in this area. The infrared temperature sensors 2 monitor the temperature of each area in real time to ensure temperature uniformity, so as to realize real-time and accurate measurement and adjustment of the temperatures of multiple areas of the streaming media circulation heating roller 1 according to the real-time thickness of the material, which can adapt to the needs of different materials and material thicknesses, and dynamically adjust the temperature distribution of the heating roller according to the actual thickness change of the material.

[0018] Different from the traditional centralized heating method, the induction heating coil 3 can achieve local rapid heating with an extremely short response time, and can timely adjust the heat demand caused by the change of material thickness. The independent closed-loop control design of the coil can be adjusted in real time according to the difference between the actual temperature and the predetermined target to ensure the accuracy of temperature control.

[0019] The control center unit includes three main parts: the partition numerical processing unit, the partition temperature compensation operation unit, and the partition analog control signal output unit. The coordinated work of these units realizes the intelligent control of the temperature of the heating roller. The system compares the detected thickness with the preset nominal thickness through PID operation, and automatically adjusts the output signal to the heating controller for controlling the induction heating coil 3 to achieve temperature compensation and meet the needs of different material thicknesses.

[0020] The utility model divides the surface of the roller body into multiple temperature control regions, and each region is equipped with an independent infrared temperature measurement probe 2 and an induction heating coil 3, enabling the heating roller to provide customized heat for different parts of the material, thereby achieving more precise temperature control. The heating power of each control region can be independently adjusted to meet the drying requirements of different regions on the width of the material, which helps to improve the quality of material production, reduce energy consumption, cut production costs, save the time and cost of repeated debugging and manual operation, and enhance the automation and intelligence level of the production line, having important market application prospects and industrial value.

Claims

1. A heating roller with zone temperature adjustment, characterized in that: The invention comprises a streaming media circulation heating roller, at least two infrared temperature measuring probes are arranged axially at intervals from one end to the other end of the streaming media circulation heating roller above the streaming media circulation heating roller, induction heating coils are arranged from one end to the other end of the streaming media circulation heating roller below the streaming media circulation heating roller in the same number as the infrared temperature measuring probes and in positions corresponding to the infrared temperature measuring probes, a material thickness mobile scanner is arranged adjacent to the streaming media circulation heating roller, and the infrared temperature measuring probe, the signal output end of the material thickness mobile scanner and the control end of the induction heating coil are all connected to a controller.

2. A heating roller with zone temperature regulation according to claim 1, characterized in that: The streaming media circulation heating roller comprises a roller body and a mold temperature controller, and the inlet and outlet of the roller body are respectively connected to the outlet and inlet of the mold temperature controller through pipelines.

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