Hot roller

Abstract

The utility model discloses a hot roller which comprises a roller body and roller surface end covers, the two roller surface end covers are arranged at the two ends of the roller body respectively, a plurality of pipelines are evenly arranged on the inner side wall of the roller body, a central pipeline is arranged on the central axis of the roller body, and an inlet and outlet partition plate is arranged on the central pipeline. The inlet and outlet partition plate divides the center pipeline into two sections including a double-layer pipeline section composed of an inner pipe and an outer pipe and an inner pipe extending section, a plurality of open holes are formed in the inner pipe extending section and correspondingly connected with one end of the pipeline on the inner side wall of the roller body, and a plurality of open holes are formed in the outer pipe wall of the double-layer pipeline section and correspondingly connected with the other end of the pipeline on the inner side wall of the roller body. The double-layer pipeline section of the central pipeline penetrates through the roller surface end cover and is connected with a rotary joint, and an inlet of the inner pipe and an outlet of the outer pipe are formed in the rotary joint. The heat-conducting oil inlet and the heat-conducting oil outlet are formed in the same side, so that space is saved; due to the design of the radial runners, the temperature distribution is uniform; the structure is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery preparation equipment, and particularly relates to a hot rolling roll. Background Art

[0002] In the design of traditional hot rolling rolls, although they play a key role in lithium battery manufacturing, there are some significant problems: Uneven temperature control: Due to the limitations of the internal flow channel design, the temperature distribution on the roll surface is uneven, which may lead to inconsistent processing quality of lithium battery sheets and thus affect the overall performance of the battery. High energy consumption: The flow channel design in traditional hot rolling rolls is unreasonable, resulting in excessive fluid resistance. The heating efficiency of this design is not high, and more energy is required to maintain the operating temperature, thereby increasing the overall energy consumption and production cost. Processing complexity: The complex internal structure of existing hot rolling rolls makes the processing cost high, which is not conducive to large-scale production and maintenance.

[0003] Therefore, it is urgent to develop a new hot rolling roll to meet the production requirements. Summary of the Utility Model

[0004] Technical problems to be solved: Aiming at the above technical problems, the utility model provides a hot rolling roll with a simple structure, which saves occupied space and has a uniform temperature distribution.

[0005] Technical solution: A hot rolling roll includes a roll body and roll surface end covers. The two roll surface end covers are respectively arranged at both ends of the roll body. A plurality of pipelines are uniformly arranged on the inner side wall of the roll body. A central pipeline is arranged on the central axis of the roll body. An inlet and outlet partition plate is arranged on the central pipeline. The inlet and outlet partition plate divides the central pipeline into two sections, including a double-layer pipeline section composed of an inner pipe and an outer pipe and an inner pipe extension section. A plurality of openings are arranged on the inner pipe extension section and are correspondingly connected to one end of the pipelines on the inner side wall of the roll body. A plurality of openings are arranged on the outer pipe wall of the double-layer pipeline section and are correspondingly connected to the other end of the pipelines on the inner side wall of the roll body. The double-layer pipeline section of the central pipeline passes through the roll surface end cover and is connected to a rotary joint. An inlet of the inner pipe and an outlet of the outer pipe are arranged on the rotary joint.

[0006] Preferably, a heat insulation layer is arranged on the outer side wall of the inner pipe of the double-layer pipeline section.

[0007] Preferably, the number of openings on the inner pipe extension section is the same as the number of pipelines on the inner side wall of the roll body.

[0008] Preferably, the number of openings on the outer pipe wall of the double-layer pipeline section is the same as the number of pipelines on the inner side wall of the roll body.

[0009] Preferably, a wear-resistant alloy layer is arranged on the outer surface of the roll body.

[0010] Beneficial effects: 1) The inlet and outlet of the heat transfer oil are arranged on the same side, which not only saves the occupied space of the roll press, provides more working space for the operators, but also reduces the complexity of the on-site pipeline layout, improves the overall efficiency of the production line and the operation convenience; through the radial flow channel design, the heat transfer oil diffuses from the center of the roll to the roll surface and then returns to the center and flows out, this design ensures the uniform distribution of the roll surface temperature, effectively solves the problem of uneven temperature, and improves the processing quality of the lithium battery electrode sheets;

[0011] 2) Compared with the traditional complex flow channel design, the design of the hot rolling roll of the present utility model simplifies the processing process, reduces the processing cost, and at the same time facilitates the large-scale production and maintenance of the equipment;

[0012] 3) The high-precision temperature sensors and control algorithms can accurately control the temperature of the roll, dynamically adjust according to the material characteristics and production requirements of the lithium battery electrode sheets, and ensure that the electrode sheets obtain the best temperature treatment during the processing;

[0013] 4) Multiple sensors monitor the operating status (temperature, pressure, speed, etc.) of the roll in real time, and the data processing system analyzes this information to optimize the processing parameters and predict the equipment maintenance requirements;

[0014] 5) The adoption of advanced material technology improves the wear resistance and corrosion resistance of the roll, and extends the service life;

[0015] 6) The automatic cleaning and maintenance system cleans the roll surface and performs necessary maintenance without interrupting the production. Brief description of the drawings

[0016] Figure 1 is the three-dimensional structure schematic diagram of a hot rolling roll of the present utility model;

[0017] Figure 2 is the sectional view of a hot rolling roll of the present utility model;

[0018] Figure 3 is the two-dimensional flow channel schematic diagram of a hot rolling roll of the present utility model;

[0019] Figure 4 is the internal flow channel grid model of a hot rolling roll of the present utility model;

[0020] Figure 5 is the roll body grid model of a hot rolling roll of the present utility model;

[0021] Figure 6 is the temperature distribution after reaching the steady state of a hot rolling roll of the present utility model;

[0022] Figure 7 is the steady-state temperature distribution of the roll surface of a hot rolling roll of the present utility model;

[0023] Reference numerals in the figure: 1. Rotary joint, 2. Central pipe, 3. Roll body, 4. Inlet and outlet partition plate, 5. Roll surface runner end cover. Specific embodiments

[0024] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] Referring to Figures 1-5 , a hot rolling roll includes a roll body 3 and roll surface end covers 5. The two roll surface end covers 5 are respectively arranged at both ends of the roll body 3. A plurality of pipes are evenly arranged on the inner side wall of the roll body 3. A central pipe 2 is arranged on the central axis of the roll body 3. An inlet and outlet partition plate 4 is arranged on the central pipe 2. The inlet and outlet partition plate 4 divides the central pipe 2 into two sections, including a double-layer pipe section composed of an inner pipe and an outer pipe and an inner pipe extension section. A plurality of openings are arranged on the inner pipe extension section and are correspondingly connected to one end of the pipes on the inner side wall of the roll body 3. A plurality of openings are arranged on the outer pipe wall of the double-layer pipe section and are correspondingly connected to the other end of the pipes on the inner side wall of the roll body 3. Through the radial flow channel design, the heat transfer oil diffuses from the center of the roll to the roll surface and then returns to the center and flows out, ensuring uniform distribution of the roll surface temperature, effectively solving the problem of uneven temperature, and improving the processing quality of lithium battery electrode sheets; the double-layer pipe section of the central pipe 2 passes through the roll surface end cover 5 and is connected to the rotary joint 1. An inlet of the inner pipe and an outlet of the outer pipe are arranged on the rotary joint 1. The inlet and outlet of the heat transfer oil are arranged on the same side, which not only saves the occupied space of the roll press, provides more working space for the operators, but also reduces the complexity of the on-site pipe layout, improves the overall efficiency of the production line and the operation convenience.

[0027] An insulating layer is arranged on the outer side wall of the inner pipe of the double-layer pipe section to prevent the heat transfer oil flowing out from exchanging heat with the heat transfer oil flowing in, resulting in heat loss.

[0028] The number of openings on the inner pipe extension section and the number of openings on the outer pipe wall of the double-layer pipe section are both the same as the number of pipes on the inner side wall of the roll body 3.

[0029] A wear-resistant alloy layer is arranged on the outer surface of the roll body 3, improving the wear resistance and corrosion resistance of the roll and extending the service life.

[0030] Embodiment 2

[0031] The hot rolling roll of Example 1 is assembled with a roll pressing and slitting integrated machine to form a roll pressing device. The hot rolling roll, as an important part of the roll pressing and slitting integrated machine, is connected to the main machine structure through a bearing seat; the temperature control system, real-time data monitoring system, automatic cleaning and maintenance system, user interface and operating system, comprehensive safety protection system, and pressure control system are all on the roll pressing device, where,

[0032] The temperature control system can precisely control the temperature of the rolling roll through high-precision temperature sensors and control algorithms. The system can dynamically adjust the temperature setting according to the specific material characteristics and production requirements of the lithium battery electrode sheet to ensure that the electrode sheet obtains the best temperature treatment during the processing. In addition, the temperature control system is equipped with fault detection and automatic calibration functions to ensure the reliability and stability of long-term operation;

[0033] The real-time data monitoring system includes multiple sensors that can monitor the operating status of the rolling roll in real time, such as temperature, pressure, speed, and the detection of the roll surface condition. These data are analyzed through a data processing system to optimize the processing parameters and predict the equipment maintenance requirements. Real-time data monitoring not only improves production efficiency and product consistency but also helps to detect and solve potential equipment problems in advance and reduce downtime;

[0034] The automatic cleaning and maintenance system can perform surface cleaning and necessary maintenance operations on the rolling roll without interrupting production. The automatic cleaning system uses cleaning agents and efficient mechanical sweeping devices (usually scrapers or brushes) to ensure that the surface of the rolling roll is always kept clean and prevent impurities from affecting product quality;

[0035] An advanced user interface and operating system. This system provides an intuitive control and monitoring interface for operators, simplifying the operation process. The user interface is designed friendly, easy to understand and operate, and at the same time provides rich customization options to meet the preferences and needs of different operators;

[0036] The advanced user interface and operating system provide an intuitive control and monitoring interface for operators, simplifying the operation process. The user interface is designed friendly, easy to understand and operate, and at the same time provides rich customization options to meet the preferences and needs of different operators;

[0037] The comprehensive safety protection system includes multiple safety functions, such as an emergency stop button, automatic power-off protection, and overload protection. These safety functions ensure that the equipment can respond quickly in any abnormal situation and protect the safety of operators and equipment;

[0038] The pressure control system can precisely adjust the pressure of the rolling roll on the lithium battery electrode sheet according to different production requirements. By precisely controlling the pressure, higher product consistency and quality can be ensured, which is particularly important when processing electrode sheets with different thicknesses or material characteristics;

[0039] The modular design enables the hot rolling roll to be quickly replaced or adjusted according to different production requirements. This modular design allows the equipment to rapidly adapt to the production of lithium battery electrodes of different specifications, enhancing the flexibility and applicability of the equipment.

[0040] Example 3

[0041] Using the hot rolling roll of Example 1, through the finite element method, the contour map of the roll surface temperature distribution of the hot rolling roll after reaching the steady state is simulated and analyzed. The thermal-fluid-solid coupling analysis of the hot rolling roll is carried out using Fluent software, and the relevant analysis settings are shown in Table 1 below:

[0042] Table 1 Parameters for thermal-fluid-solid coupling analysis of hot rolling roll using Fluent software

[0043]

[0044] Considering the convective heat transfer between the hot rolling roll due to its rotation and the air, and the contact heat transfer between the hot rolling roll and the bearing, the calculation of the heat transfer coefficients for these two heat transfer methods is as follows:

[0045] Calculation of convective heat transfer:

[0046] The Dittus - Boelter equation is used (applicable range: Reynolds number Re = 10 3 ~10 6 )

[0047]

[0048] For convective heat transfer, m and n generally take 0.6 and 0.4, and C takes 0.3;

[0049]

[0050] The Nusselt number is obtained as 239.16.

[0051] Therefore, the convective heat transfer coefficient is

[0052]

[0053] Calculation of contact heat transfer:

[0054] It is assumed that the hot rolling roll and the bearing are in full contact, and the contact distance between the bearing and the hot rolling roll is 0.1 mm.

[0055] The calculation formula for the contact heat transfer coefficient is

[0056]

[0057] The thermal conductivity of the hot rolling roll (9Cr3Mo) is 25 W / (m·K), so the contact heat transfer coefficient is

[0058]

[0059] Taking the above boundary conditions as the input of the analysis, a steady-state thermo-fluid-solid coupling analysis is carried out on the hot rolling roll. The analysis results show that: after reaching the steady state, as Figure 6 shown, the temperature in the roll pressure area of the hot rolling roll basically maintains at 383K, that is, 110°C.

[0060] The roll surface temperature results of the hot rolling roll are extracted separately. As Figure 7 shown, the highest temperature of the hot rolling roll is 108.79°C, the lowest temperature is 108.18°C, the temperature consistency is 0.61°C, and the temperature difference on the roll surface is controlled within 1°C. Through simulation analysis, the uniform distribution of the flow velocity inside the roll surface flow channel is verified, which further ensures the temperature consistency of the roll surface and helps to improve the quality and consistency of lithium battery sheets.

[0061] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A hot rolling roll, characterized in that: It includes a roll body (3) and roll surface end caps (5). The two roll surface end caps (5) are respectively arranged at both ends of the roll body (3). A number of pipes are evenly provided on the inner side wall of the roll body (3). A central pipe (2) is provided on the central axis of the roll body (3). An inlet and outlet partition plate (4) is provided on the central pipe (2). The inlet and outlet partition plate (4) divides the central pipe (2) into two sections, including a double-layer pipe section composed of an inner pipe and an outer pipe and an inner pipe extension section. A number of openings are provided on the inner pipe extension section and are correspondingly connected to one ends of the pipes on the inner side wall of the roll body (3). A number of openings are provided on the outer pipe wall of the double-layer pipe section and are correspondingly connected to the other ends of the pipes on the inner side wall of the roll body (3). The double-layer pipe section of the central pipe (2) passes through the roll surface end cap (5) and is connected to a rotary joint (1). An inlet of the inner pipe and an outlet of the outer pipe are provided on the rotary joint (1).

2. The hot rolling roll according to claim 1, wherein: A heat insulation layer is provided on the outer side wall of the inner pipe of the double-layer pipe section.

3. A hot rolling roll according to claim 1, characterized in that: The number of openings on the inner pipe extension section is the same as the number of pipes on the inner side wall of the roll body (3).

4. A hot rolling roll according to claim 1, characterized in that: The number of openings on the outer pipe wall of the double-layer pipe section is the same as the number of pipes on the inner side wall of the roll body (3).

5. A hot rolling roll according to claim 1, characterized in that: A wear-resistant alloy layer is provided on the outer surface of the roll body (3).

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