Heating roller and rolling equipment

Abstract

The utility model provides a heating roller and rolling equipment, and the rolling equipment comprises a roller body, a heating device and a heating device, the multiple heating pieces extend in the length direction of the roller body, and the multiple heating pieces are evenly distributed in the roller body in the circumferential direction of the roller body; the heat pipe assembly is of an annular frame structure, the heat pipe assembly is arranged in the roller body, and the multiple heating pieces are located on the inner circumference of the heat pipe assembly. According to the heating roller, the heat pipe assembly is arranged in the roller body, and the heat pipe assembly has extremely high heat transfer efficiency, so that the heat pipe assembly can quickly transfer heat generated by the heating pieces on the peripheries of the heating pieces in the circumferential direction of the roller body, and the temperature difference of the circumferential surface of the roller body can be effectively reduced; the temperature uniformity of the surface of the roller body is improved; in addition, independent temperature control can be carried out on the multiple heating pieces, and the temperature uniformity of the surface of the roller body can be further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery preparation equipment, and more specifically, to a heating roller and a rolling device. Background Art

[0002] Electric heating rollers are widely used in the lithium battery electrode material production industry. Some specific production processes have high requirements for the surface temperature consistency (temperature uniformity) of electric heating rollers. However, the existing electric heating roller structure usually heats the roller body by installing an electric heating rod inside the metal roller body. This method has low heat transfer efficiency, high power consumption, poor temperature uniformity on the roller surface, and a temperature fluctuation range of up to ±5°C, which has a great impact on the performance of the electrode material. Utility Model Content

[0003] The utility model provides a new technical solution for a heating roller, which can at least solve the problem of poor surface temperature uniformity of the existing heating roller.

[0004] The utility model also provides a rolling device, comprising the above-mentioned heating roller.

[0005] According to a first aspect of the utility model, a heating roller is provided, comprising: a roller body; a plurality of heating elements, the plurality of heating elements extending along the length direction of the roller body, and the plurality of heating elements being evenly distributed in the roller body along the circumference of the roller body; a heat pipe assembly, the heat pipe assembly being formed into an annular frame structure, the heat pipe assembly being arranged in the roller body, and the plurality of heating elements being located at the inner circumference of the heat pipe assembly.

[0006] Optionally, the heat pipe assembly and the roller body are brazed together.

[0007] Optionally, in the radial direction of the roller body, the minimum distance between the heating element and the circumferential surface of the roller body is smaller than the distance between the heating element and the axis of the roller body.

[0008] Optionally, the heat pipe assembly includes: a plurality of first heat pipe segments, the first heat pipe segments extending along the length direction of the roller body, the plurality of first heat pipe segments being uniformly distributed in the roller body along the circumference of the roller body, and the distribution density of the first heat pipe segments in the circumference of the roller body is less than the distribution density of the heating element; and at least one second heat pipe segment, the second heat pipe segment being formed as an annular body extending along the circumference of the roller body, the second heat pipe segment connecting the plurality of first heat pipe segments.

[0009] Optionally, the heat pipe assembly includes two second heat pipe segments, one of which connects the first ends of multiple first heat pipe segments, and the other of which connects the second ends of multiple first heat pipe segments.

[0010] Optionally, a mounting groove is provided at the end of the roller body, the mounting groove is matched with the second heat pipe section, and the second heat pipe section is arranged in the mounting groove.

[0011] Optionally, the roller body is provided with a plurality of first mounting holes extending along its length direction, the number of the first mounting holes corresponds to the number of the heating elements, and the heating elements fill the entire first mounting holes; and / or, the roller body is provided with a plurality of second mounting holes extending along its length direction, the number of the second mounting holes corresponds to the number of the first heat pipe sections, and the first heat pipe sections fill the entire second mounting holes.

[0012] Optionally, the heating roller further comprises: two end covers, which are arranged at two ends of the roller body and are used to fix the heating element.

[0013] Optionally, a plug-in portion is provided on one side of the end cover close to the roller body, and the plug-in portion is plugged into the mounting groove. The heating roller further comprises: a sealing member, which is sleeved on the plug-in portion and used to fill a gap between the plug-in portion and the wall of the mounting groove.

[0014] Optionally, the heating roller further comprises: a plurality of temperature detection members, the plurality of temperature detection members are evenly distributed in the roller body along the circumference of the roller body, and the temperature detection members are used to detect the temperature of the roller body.

[0015] According to a second aspect of the utility model, a rolling device is provided, comprising the above-mentioned heating roller.

[0016] According to the heating roller of the utility model, a heat pipe assembly is arranged inside the roller body, and the heat pipe assembly has an extremely high heat transfer efficiency, so that the heat pipe assembly can quickly transfer the heat generated by the plurality of heating elements at the periphery of the roller body in the circumferential direction, thereby effectively reducing the temperature difference on the circumferential surface of the roller body and improving the temperature uniformity of the surface of the roller body; and the plurality of heating elements can be independently temperature-controlled, which can further ensure the temperature uniformity of the surface of the roller body.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0019] Figure 1 is a three-dimensional diagram of a heating roller according to an embodiment of the utility model;

[0020] Figure 2 This is a front view of a heating roller according to an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 Sectional view at midline AA;

[0022] Figure 4 This is a right side view of a heating roller according to an embodiment of the utility model;

[0023] Figure 5 yes Figure 3 Sectional view at midline BB;

[0024] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at the center circle C.

[0025] Reference numerals

[0026] Heating roller 100;

[0027] Roller body 10; mounting groove 11;

[0028] Heating element 20;

[0029] Heat pipe assembly 30; first heat pipe section 31; second heat pipe section 32;

[0030] End cover 40; plug-in portion 41;

[0031] Sealing member 50 ; Temperature detecting member 60 . DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] The heating roller 100 according to the embodiment of the present utility model will be described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 6 As shown, the heating roller 100 according to the embodiment of the present invention includes a roller body 10 , a plurality of heating elements 20 , and a heat pipe assembly 30 .

[0039] Specifically, the heating element 20 extends along the length direction of the roller body 10, and multiple heating elements 20 are evenly distributed in the roller body 10 along the circumference of the roller body 10. The heat pipe assembly 30 is formed into an annular frame structure, and the heat pipe assembly 30 is arranged in the roller body 10. Multiple heating elements 20 are located on the inner periphery of the heat pipe assembly 30.

[0040] In other words, if Figures 1 to 6 As shown, the heating roller 100 according to the embodiment of the utility model mainly includes a roller body 10, a plurality of heating elements 20 and a heat pipe assembly 30, wherein the roller body 10 is a forging, and the hardness is increased by quenching during processing, the hardness is HRC62-64, the quenching depth is greater than 5mm, and the length direction of the roller body 10 is the same as the length direction of the heating element 20. The number of the heating elements 20 can be six, and the six heating elements 20 are respectively arranged inside the roller body 10 to heat the roller body 10 at different positions of the circumference of the roller body 10, and the plurality of heating elements 20 are evenly distributed in the circumference of the roller body 10, so that the temperature uniformity of the circumferential surface (roller surface) of the roller body 10 can be effectively guaranteed.

[0041] The heat pipe assembly 30 can be formed into an annular frame structure, the length direction of the heat pipe assembly 30 is the same as the length direction of the roller body 10, and the radial dimension of the heat pipe assembly 30 is smaller than the radial dimension of the roller body 10, so that the heat pipe assembly 30 can be arranged inside the roller body 10, and the multiple heating elements 20 are all located on the inner periphery of the heat pipe assembly 30, so that the heat pipe assembly 30 can quickly transfer the heat generated by the heating elements 20 in the circumference of the roller body 10 at the outer periphery of the multiple heating elements 20, thereby effectively reducing the temperature difference of the circumferential surface of the roller body 10. Experiments show that the roller surface temperature difference of the heating roller 100 of the embodiment of the utility model is ≤±0.5℃.

[0042] It should be noted that the "heat pipe" in the heat pipe assembly 30 is a heat transfer element that relies on the phase change of its internal working fluid to achieve heat transfer. It has extremely high heat transfer efficiency and is known as a thermal superconductor.

[0043] Therefore, according to the heating roller 100 provided in this embodiment, by arranging the heat pipe assembly 30 inside the roller body 10, the heat pipe assembly 30 has an extremely high heat transfer efficiency, so that the heat pipe assembly 30 can quickly transfer the heat generated by the multiple heating elements 20 at the periphery of the roller body 10 in the circumferential direction, thereby effectively reducing the temperature difference of the circumferential surface of the roller body 10 and improving the temperature uniformity of the surface of the roller body 10; and the multiple heating elements 20 can be independently temperature-controlled, which can further ensure the temperature uniformity of the surface of the roller body 10.

[0044] Furthermore, the heating element 20 is formed as an electric heating rod in a slender cylindrical structure extending along the length direction of the roller body 10, and the heating power of the electric heating rod can be 1500W.

[0045] In some examples of the present invention, the roller body is provided with a mounting channel penetrating along the axial direction thereof.

[0046] According to an embodiment of the present invention, the heat pipe assembly 30 and the roller body 10 are brazed together.

[0047] Specifically, the heat pipe assembly 30 and the roller body 10 are welded together by solder, so that the heat pipe assembly 30 is fixed on the roller body 10, and the solder can fill the gap between the heat pipe assembly 30 and the roller body 10, which can effectively improve the heat transfer efficiency of the connection interface between the heat pipe assembly 30 and the roller body 10, thereby further improving the temperature uniformity of the surface of the roller body 10.

[0048] In some embodiments of the present invention, in the radial direction of the roller body 10 , the minimum distance between the heating element 20 and the circumferential surface of the roller body 10 is smaller than the distance between the heating element 20 and the axis of the roller body 10 .

[0049] That is to say, Figure 3 As shown, in the radial direction of the roller body 10, the minimum distance between the heating element 20 and the circumferential surface of the roller body 10 is d1, and the distance between the heating element 20 and the axis of the roller body 10 is d2, d1<d2, thereby ensuring that the heat generated by the heating element 20 can be transferred to the circumferential surface of the roller body 10 more quickly.

[0050] According to one embodiment of the utility model, the heat pipe assembly 30 includes: a plurality of first heat pipe segments 31 and at least one second heat pipe segment 32, the first heat pipe segments 31 extend along the length direction of the roller body 10, the plurality of first heat pipe segments 31 are evenly distributed in the roller body 10 along the circumference of the roller body 10, and in the circumference of the roller body 10, the distribution density of the first heat pipe segments 31 is less than the distribution density of the heating element 20, the second heat pipe segment 32 is formed as an annular body extending along the circumference of the roller body 10, and the second heat pipe segment 32 connects the plurality of first heat pipe segments 31.

[0051] In other words, if Figure 3 and Figure 6As shown, the heat pipe assembly 30 according to the embodiment of the utility model mainly includes a plurality of first heat pipe segments 31 and at least one second heat pipe segment 32, wherein the first heat pipe segment 31 is formed as a columnar structure extending along the length direction (axial direction) of the roller body 10, so that the heat pipe assembly 30 can quickly transfer the heat emitted by the heating element 20 in the length direction of the roller body 10; one end of the plurality of first heat pipe segments 31 is connected and conducted with the second heat pipe segment 32, so that the heat emitted by the heating element 20 can be quickly transferred in the circumferential direction of the roller body 10 through the second heat pipe segment 32, thereby effectively reducing the temperature difference of the circumferential surface of the roller body 10; and the plurality of first heat pipe segments 31 are evenly distributed along the circumference of the roller body 10 inside the roller body 10, thereby further reducing the temperature difference of the circumferential surface of the roller body 10.

[0052] In some embodiments of the present invention, the heat pipe assembly 30 includes two second heat pipe segments 32 , wherein one second heat pipe segment 32 connects the first ends of multiple first heat pipe segments 31 , and the other second heat pipe segment 32 connects the second ends of multiple first heat pipe segments 31 .

[0053] That is to say, Figure 5 and Figure 6 As shown, the heat pipe assembly 30 may include two second heat pipe segments 32, multiple first heat pipe segments 31 are located between the two second heat pipe segments 32, and the first ends of the multiple first heat pipe segments 31 are connected and conducted with one of the second heat pipe segments 32, and the second ends of the multiple first heat pipe segments 31 are connected and conducted with another second heat pipe segment 32, so that the two second heat pipe segments 32 can conduct heat at both ends of the multiple first heat pipe segments 31, which can further reduce the temperature difference of the circumferential surface of the roller body 10 and improve the temperature uniformity of the surface of the roller body 10.

[0054] According to an embodiment of the utility model, a mounting groove 11 is provided at the end of the roller body 10 , the mounting groove 11 is matched with the second heat pipe section 32 , and the second heat pipe section 32 is provided in the mounting groove 11 .

[0055] Specifically, Figure 6 As shown, mounting grooves 11 are respectively provided at both ends of the roller body 10, and the mounting grooves 11 extend along the circumference of the roller body 10 to form an annular groove adapted to the second heat pipe section 32, so that both second heat pipe sections 32 can be arranged in the mounting grooves 11, thereby improving the utilization rate of heat and facilitating the assembly of the heat pipe assembly 30.

[0056] In some embodiments of the utility model, the roller body 10 is provided with a plurality of first mounting holes extending along its length direction, the number of the first mounting holes corresponds to the number of the heating elements 20, and the heating elements 20 fill the entire first mounting holes; and / or, the roller body 10 is provided with a plurality of second mounting holes extending along its length direction, the number of the second mounting holes corresponds to the number of the first heat pipe sections 31, and the first heat pipe sections 31 fill the entire second mounting holes.

[0057] In detail, a first mounting hole is provided at the end of the roller body 10, and the number of the first mounting holes is the same as the number of the heating elements 20. The first mounting holes are formed as a through-hole structure penetrating along the length direction of the roller body 10. The length and radial dimensions of the heating element 20 are configured to be substantially the same as the length and radial dimensions of the first mounting hole, so that the heating element 20 can fill the entire first mounting hole, and the structure is simple and convenient for production and assembly; moreover, the roller body 10 can be heated at each position along its length direction by the heating element 20, which can effectively ensure the uniform temperature of the roller body 10 along its length direction.

[0058] Furthermore, a second mounting hole is provided at the end of the roller body 10, and the number of the second mounting holes is the same as the number of the first heat pipe sections 31. The second mounting holes are formed as a through hole structure penetrating along the length direction of the roller body 10. The length and radial dimensions of the first heat pipe section 31 are configured to be substantially the same as the length and radial dimensions of the first mounting hole, so that the first heat pipe section 31 can fill the entire first mounting hole, and the structure is simple and convenient for production and assembly; and heat can be transferred at each position in the length direction of the roller body 10 through the first heat pipe section 31, which can effectively ensure the uniform temperature of the roller body 10 in its length direction.

[0059] According to an embodiment of the present invention, the heating roller 100 further includes: two end covers 40 , which are disposed at two ends of the roller body 10 , and the end covers 40 are used to fix the heating element 20 .

[0060] That is to say, Figure 1 and Figure 2 As shown, the roller body 10 is provided with end covers 40 at both ends of its length direction (axial direction), and the end covers 40 can be fixedly connected to the roller body 10 by screws, so that the heating element 20 can be fixed by the end covers 40 at both ends of the roller body 10, and the structure is simple and convenient for production and assembly.

[0061] One of the end covers 40 is provided with a first through hole penetrating along the thickness direction thereof, and the first through hole corresponds to the position of the heating element 20, so that the wiring section of the heating element 20 can be exposed from the first through hole for connection with the control circuit.

[0062] In some embodiments of the utility model, a plug-in portion 41 is provided on one side of the end cover 40 close to the roller body 10, and the plug-in portion 41 is plugged into the mounting groove 11. The heating roller 100 also includes: a sealing member 50, which is sleeved on the plug-in portion 41 and is used to fill the gap between the plug-in portion 41 and the wall of the mounting groove 11.

[0063] Specifically, Figure 6 As shown, a plug-in portion 41 extending in the thickness direction of the end cap 40 is provided on one side close to the roller body 10, and the plug-in portion 41 is formed as a boss structure adapted to the position and shape of the mounting groove 11. When the end cap 40 is connected to the roller body 10, the plug-in portion 41 is plugged into the mounting groove 11, thereby sealing the open end of the mounting groove 11. When the brazing material connecting the heat pipe assembly 30 and the roller body 10 melts due to excessive temperature, the brazing material can be sealed in the mounting groove 11 through the plug-in portion 41, which can effectively prevent the loss of the brazing material.

[0064] Furthermore, the side wall of the plug-in part 41 is provided with an annular groove extending along its circumference, and the plug-in part 41 is provided with a sealing member 50 at the position of the annular groove. The sealing member 50 can be a high-temperature resistant rubber ring. The sealing member 50 can fill the gap between the plug-in part 41 and the wall surface of the installation groove 11, thereby achieving a sealing effect, and further preventing the loss of solder.

[0065] According to an embodiment of the present invention, the heating roller 100 further includes: a plurality of temperature detection members 60 , which are evenly distributed in the roller body 10 along the circumference of the roller body 10 , and the temperature detection members 60 are used to detect the temperature of the roller body 10 .

[0066] That is to say, Figure 1 and Figure 3 As shown, the end of the roller body 10 is provided with a plurality of third mounting holes extending along the length direction thereof, the number of the third mounting holes may be three, and the three third mounting holes may be evenly distributed along the circumference of the roller body 10, and a temperature detection component 60 is provided in each third mounting hole, and the temperature detection component 60 may be a thermocouple, and one of the end covers 40 is provided with a second through hole penetrating along the thickness direction thereof, and the position and number of the second through holes correspond to the position and number of the temperature detection component 60, so that the wiring terminal of each temperature detection component 60 can be exposed from the end cover 40 for connection with the control circuit.

[0067] In this embodiment, the temperature of the roller body 10 is detected at different circumferential positions of the roller body 10 by setting up multiple temperature detection members 60. When in use, the control system can adjust the temperature of the heating member 20 at the corresponding position according to the temperature feedback from the temperature detection member 60, so as to ensure the temperature uniformity of the surface of the roller body 10.

[0068] The embodiment of the present utility model further provides a rolling device, which is, for example, but not limited to, a pole piece rolling machine, a pole piece coating device, etc. The rolling device includes the heating roller 100 described in any of the above embodiments, and the heating element 20 and the temperature detection element 60 of the heating roller 100 are both electrically connected to the control system of the rolling device. Since the heating roller 100 according to the embodiment of the present utility model has the above technical effects, the rolling device according to the embodiment of the present utility model also has the corresponding technical effects, which will not be described in detail in this embodiment.

[0069] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A heating roller, characterized in that: include: Roller body; A plurality of heating elements, wherein the plurality of heating elements extend along the length direction of the roller body, and the plurality of heating elements are evenly distributed within the roller body along the circumference of the roller body; The heat pipe assembly is formed into a ring-shaped frame structure, the heat pipe assembly is arranged in the roller body, and the plurality of heating elements are located on the inner periphery of the heat pipe assembly.

2. The heating roller according to claim 1, characterized in that The heat pipe assembly is brazed with the roller body.

3. The heating roller according to claim 1, characterized in that In the radial direction of the roller body, the minimum distance between the heating element and the circumferential surface of the roller body is smaller than the distance between the heating element and the axis of the roller body.

4. The heating roller according to claim 1, characterized in that The heat pipe assembly comprises: A plurality of first heat pipe segments, wherein the first heat pipe segments extend along the length direction of the roller body, and the plurality of first heat pipe segments are evenly distributed in the roller body along the circumference of the roller body, and the distribution density of the first heat pipe segments in the circumference of the roller body is less than the distribution density of the heating element; At least one second heat pipe segment is formed as an annular body extending along the circumference of the roller body, and the second heat pipe segment connects a plurality of the first heat pipe segments.

5. The heating roller according to claim 4, characterized in that The heat pipe assembly includes two second heat pipe segments, one of which connects the first ends of a plurality of the first heat pipe segments, and the other of which connects the second ends of a plurality of the first heat pipe segments.

6. The heating roller according to claim 4, characterized in that The end of the roller body is provided with a mounting groove, the mounting groove is adapted to the second heat pipe section, and the second heat pipe section is arranged in the mounting groove.

7. The heating roller according to claim 4, characterized in that: The roller body is provided with a plurality of first mounting holes penetrating along the length direction thereof, the number of the first mounting holes corresponds to the number of the heating elements, and the heating elements fill the entire first mounting holes; and / or, The roller body is provided with a plurality of second mounting holes penetrating along the length direction thereof, the number of the second mounting holes corresponds to the number of the first heat pipe sections, and the first heat pipe sections fill the entire second mounting holes.

8. The heating roller according to claim 6, characterized in that: Also includes: Two end covers are arranged at two ends of the roller body, and the end covers are used to fix the heating element.

9. The heating roller according to claim 8, characterized in that The end cover is provided with a plug-in portion on one side close to the roller body, and the plug-in portion is plugged into the mounting groove. The heating roller further comprises: A sealing member is sleeved on the plug-in portion and is used to fill a gap between the plug-in portion and a wall surface of the installation groove.

10. The heating roller according to any one of claims 1 to 9, characterized in that: Also includes: A plurality of temperature detection members are evenly distributed in the roller body along the circumference of the roller body, and the temperature detection members are used to detect the temperature of the roller body.

11. A rolling device, characterized in that: The heating roller according to any one of claims 1 to 10 is included.

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