Hot roller with uniform temperature

Abstract

The utility model relates to a hot roller with the uniform temperature, and belongs to the technical field of rollers, the hot roller comprises an outer cylinder, an inner cylinder, a plurality of spiral plates and a plurality of partition plates, a first gap, a second gap and a third gap are formed between the inner cylinder and the outer cylinder, a main runner of the inner cylinder extends to the middle from the end face, a sub-runner is arranged in the middle of the inner cylinder, and the spiral plates are arranged in the sub-runner. The two ends of the sub-runner communicate with the main runner and the first spiral runner or the main runner and the second spiral runner correspondingly, the ends of the first spiral runner and the second spiral runner communicate with the sub-runner, the first spiral runner extends towards the first end, and the second spiral runner extends towards the second end. According to the hot roller with the uniform temperature, liquid in the main flow channel can flow to the first spiral flow channel and the second spiral flow channel through the sub-flow channels, so that the liquid spirally flows from the middle of the hot roller to the two ends of the hot roller, the surface temperature of the hot roller is relatively uniform, and the rolling effect of a battery pole piece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of rollers, and in particular to a hot roller with uniform temperature. Background Art

[0002] In lithium-ion battery manufacturing, heated rollers are often used to coat electrode materials. They apply pressure to the electrode material, ensuring uniform density. They help evenly coat the material and quickly dry the slurry through heating, thus forming the electrode layer. They also provide essential heating and cooling functions during the production process. For example, after the electrode material is coated, heated rollers can quickly heat the material to dry it and, if necessary, cool it quickly to ensure the quality and consistency of the battery material.

[0003] Existing hot rollers mainly use heat transfer oil or cooling water to heat and cool the electrodes. However, due to their own structural problems, the roller surface temperature is often uneven. During the rolling action, due to the difference in roller surface temperature, the thermal stress on the rolled electrodes is different, resulting in different densities of different parts of the produced electrodes. Utility Model Content

[0004] Based on this, it is necessary to provide a heating roller with uniform temperature to solve the technical problem of uneven surface temperature of the heating roller in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides a heat roller with uniform temperature, which comprises:

[0006] The outer cylinder has a first end that is sealed and a second end that is provided with a drain port;

[0007] The inner cylinder is arranged in the outer cylinder, and the inner cylinder and the outer cylinder are coaxially arranged. A first gap is formed between the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder. The inner cylinder is provided with a main flow channel along its axis. The main flow channel extends from the end surface of the inner cylinder close to the drain outlet to the middle part of the inner cylinder along its axial direction. The inner cylinder is evenly provided with 2n sub-flow channels along its circumference in the middle part of the axial direction, where n is an integer greater than or equal to 1. The two ends of the sub-flow channel are respectively connected to the main flow channel and the first gap. The inner cylinder is provided with n return flow channels extending along its axial direction. A second gap is formed between the end surface of the first end and the inner cylinder, and a third gap is formed between the end surface of the second end and the inner cylinder. The second gap and the third gap are both used to connect the return flow channel and the first gap.

[0008] Multiple spiral plates are disposed in the first gap, and the outer cylinder, the inner cylinder, and the multiple spiral plates enclose n first spiral flow channels and n second spiral flow channels, one end of the first spiral flow channel is connected to the sub-flow channel, and the other end of the first spiral flow channel extends toward the first end, one end of the second spiral flow channel is connected to the sub-flow channel, and the other end of the second spiral flow channel extends toward the second end, and the n first spiral flow channels and the n second spiral flow channels are sequentially staggered along the circumference of the inner cylinder; and

[0009] A plurality of partitions are used to respectively block the ends of the first spiral flow channel and the second spiral flow channel close to the sub-flow channel.

[0010] Optionally, the diameter of the sub-flow channel communicating with the first spiral flow channel is larger than the diameter of the sub-flow channel communicating with the second spiral flow channel.

[0011] Optionally, the thickness of the spiral plate gradually decreases from the side close to the inner cylinder to the side close to the outer cylinder.

[0012] Optionally, the cross section of the spiral plate is an isosceles trapezoid.

[0013] Optionally, the main channel is externally connected to a water inlet pipe, the drain outlet is externally connected to a drain pipe, and the water inlet pipe is arranged inside the drain pipe.

[0014] Optionally, n is 4.

[0015] Optionally, a rotating shaft is provided on the end surfaces of the first end and the second end.

[0016] Optionally, a plurality of n first baffles are provided in the second gap, and the n first baffles separate the second gap into n first connecting flow channels, and each first connecting flow channel is connected to a first spiral flow channel and a return flow channel.

[0017] Optionally, a plurality of n second baffles are provided in the third gap, and the n second baffles divide the third gap into n second connecting flow channels, and each second connecting flow channel is connected to a second spiral flow channel and a return flow channel.

[0018] The beneficial effect of the temperature-uniform hot roller provided by the present application is that, compared with the prior art, the temperature-uniform hot roller of the present application includes an outer cylinder, an inner cylinder, multiple spiral plates and multiple partitions, a first gap is formed between the outer circumference of the inner cylinder and the inner circumference of the outer cylinder, a second gap and a third gap are formed between the two ends of the outer cylinder and the inner cylinder respectively, the main channel of the inner cylinder extends from the end face to the middle part, 2n sub-channels are evenly arranged in the middle part of the inner cylinder, the two ends of the sub-channels are respectively connected to the main channel and the first spiral channel or the main channel and the second spiral channel, the ends of the first spiral channel and the second spiral channel are both connected to the sub-channels, the first spiral channel extends to the first end, and the second spiral channel extends to the second end, so that the liquid in the main channel can flow to the first spiral channel and the second spiral channel respectively through each sub-channel, thereby making the liquid flow spirally from the middle part to the two ends of the hot roller, the surface temperature of the hot roller is relatively uniform, and the rolling effect of the battery electrode is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0020] Figure 1 Schematic diagram of the cross-sectional structure of the heat roller with uniform temperature provided in the embodiment of the present application Figure 1 ;

[0021] Figure 2 Schematic diagram of the cross-sectional structure of the heat roller with uniform temperature provided in the embodiment of the present application Figure 2 ;

[0022] Figure 3 Schematic diagram of the three-dimensional structure of the inner cylinder of the heat roller with uniform temperature provided in the embodiment of the present application Figure 1 ;

[0023] Figure 4 Schematic diagram of the three-dimensional structure of the inner cylinder of the heat roller with uniform temperature provided in the embodiment of the present application Figure 2 .

[0024] Description of reference numerals:

[0025] 1. Outer cylinder; 110. First end; 120. Second end; 2. Inner cylinder; 210. Main flow channel; 220. Sub-flow channel; 230. Return flow channel; 3. First gap; 4. Second gap; 5. Third gap; 6. Spiral plate; 7. First spiral flow channel; 8. Second spiral flow channel; 9. Partition; 10. Water inlet pipe; 11. Drain pipe; 12. Rotating shaft; 13. First baffle; 14. First connecting flow channel; 15. Second baffle; 16. Second connecting flow channel. DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0029] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] The embodiment of the present application provides a heat roller with uniform temperature. Figures 1 to 4, the temperature uniform hot roller comprises an outer cylinder 1, an inner cylinder 2, a plurality of spiral plates 6 and a plurality of partitions 9, the first end 110 of the outer cylinder 1 is sealed, and the second end 120 of the outer cylinder 1 is provided with a drain outlet; the inner cylinder 2 is arranged in the outer cylinder 1, the inner cylinder 2 and the outer cylinder 1 are coaxially arranged, and a first gap 3 is formed between the outer circumference of the inner cylinder 2 and the inner circumference of the outer cylinder 1, the inner cylinder 2 is provided with a main flow channel 210 along its axis, the main flow channel 210 extends from the end face of the inner cylinder 2 close to the drain outlet to the middle part of the inner cylinder 2 along its axial direction, the inner cylinder 2 is uniformly provided with 2n sub-flow channels 220 along its circumference in the middle part of the axial direction, n is an integer greater than or equal to 1, the two ends of the sub-flow channel 220 are respectively connected to the main flow channel 210 and the first gap 3, the inner cylinder 2 is provided with n return channels 230 extending along its axial direction, the first end 110 A second gap 4 is formed between the end face and the inner cylinder 2, and a third gap 5 is formed between the end face of the second end 120 and the inner cylinder 2. The second gap 4 and the third gap 5 are both used to connect the return channel 230 and the first gap 3; multiple spiral plates 6 are arranged in the first gap 3, and the outer cylinder 1, the inner cylinder 2 and the multiple spiral plates 6 are enclosed to form n first spiral flow channels 7 and n second spiral flow channels 8. One end of the first spiral flow channel 7 is connected to the sub-flow channel 220, and the other end of the first spiral flow channel 7 extends to the first end 110. One end of the second spiral flow channel 8 is connected to the sub-flow channel 220, and the other end of the second spiral flow channel 8 extends to the second end 120. The n first spiral flow channels 7 and the n second spiral flow channels 8 are staggered in sequence along the circumference of the inner cylinder 2, and multiple partitions 9 are used to block the ends of the first spiral flow channel 7 and the second spiral flow channel 8 close to the sub-flow channel 220.

[0033] Specifically, the number of sub-channels 220 is an even number, and the number of first spiral channels 7 is the same as the number of second spiral channels 8, so that the heat transfer from the middle to both ends of the hot roller is consistent, thereby improving the uniformity of the surface temperature of the hot roller.

[0034] Specifically, the partition 9 can also separate the first spiral flow channels 7 and the second spiral flow channels 8 from each other to avoid mutual interference.

[0035] In the embodiment of the present application, the temperature-uniform hot roller includes an outer cylinder 1, an inner cylinder 2, a plurality of spiral plates 6 and a plurality of partitions 9. A first gap 3 is formed between the outer circumference of the inner cylinder 2 and the inner circumference of the outer cylinder 1, and a second gap 4 and a third gap 5 are formed between the two ends of the outer cylinder 1 and the inner cylinder 2, respectively. The main flow channel 210 of the inner cylinder 2 extends from the end surface to the middle part, and 2n sub-flow channels 220 are evenly arranged in the middle part of the inner cylinder 2. The two ends of the sub-flow channel 220 are respectively connected to the main flow channel 210 and the first spiral flow channel 7 or The main channel 210 and the second spiral channel 8, the ends of the first spiral channel 7 and the second spiral channel 8 are all connected to the sub-channel 220, the first spiral channel 7 extends to the first end 110, and the second spiral channel 8 extends to the second end 120, so that the liquid in the main channel 210 can flow to the first spiral channel 7 and the second spiral channel 8 respectively through each sub-channel 220, thereby making the liquid flow spirally from the middle of the hot roller to both ends, and the surface temperature of the hot roller is relatively uniform, thereby improving the rolling effect of the battery electrode.

[0036] In one embodiment, see Figure 2 , the diameter of the sub-flow channel 220 communicating with the first spiral flow channel 7 is greater than the diameter of the sub-flow channel 220 communicating with the second spiral flow channel 8.

[0037] It can be understood that the liquid flows through the second spiral flow channel 8 and then flows back to the drain outlet. The overall flow channel is longer and the resistance will be greater. Therefore, the diameter of the sub-flow channel 220 connected to the first spiral flow channel 7 is set to be larger than the diameter of the sub-flow channel 220 connected to the second spiral flow channel 8, so as to ensure that the flow rates in the first spiral flow channel 7 and the second spiral flow channel 8 are consistent as much as possible, and to ensure that the heat transfer of the hot roller from the middle to the two ends is consistent.

[0038] In one embodiment, see Figure 1 The thickness of the spiral plate 6 gradually decreases from the side close to the inner cylinder 2 to the side close to the outer cylinder 1.

[0039] By setting as above, the contact area between the liquid in the first spiral flow channel 7 and the second spiral flow channel 8 and the outer cylinder 1 can be increased, the heat difference reaching the wall of the outer cylinder 1 can be reduced, and the formation of large strip temperature zone differences can be avoided.

[0040] In one embodiment, see Figure 1 , the cross section of the spiral plate 6 is an isosceles trapezoid.

[0041] In one embodiment, see Figure 1 The main channel 210 is connected to a water inlet pipe 10, and the drain outlet is connected to a drain pipe 11. The water inlet pipe 10 is arranged in the drain pipe 11, and the water inlet pipe 10 and the drain pipe 11 are coaxially arranged to facilitate the rotation of the hot roller.

[0042] In one embodiment, n is 4.

[0043] In other embodiments, n may also be 3, 5, 6 or other integers. The value of n is designed according to the overall temperature uniformity and resistance requirements of the hot roller and is not limited here.

[0044] In one embodiment, see Figure 1 A rotating shaft 12 is provided on the end surfaces of the first end 110 and the second end 120 to facilitate the rotation of the outer cylinder 1.

[0045] In one embodiment, see Figure 3 A plurality of n first baffles 13 are provided in the second gap 4 , and the n first baffles 13 separate the second gap 4 into n first connecting flow channels 14 , and each first connecting flow channel 14 is connected to a first spiral flow channel 7 and a return flow channel 230 .

[0046] In this way, the paths for the first spiral flow channels 7 to flow back to the drain outlet are separated from each other, thereby preventing the internal liquids of the first spiral flow channels 7 from interfering with each other when the liquids flow back.

[0047] In one embodiment, see Figure 4 A plurality of n second baffles 15 are provided in the third gap 5 , and the n second baffles 15 separate the third gap 5 into n second connecting flow channels 16 , and each second connecting flow channel 16 is connected to a second spiral flow channel 8 and a return flow channel 230 .

[0048] In this way, the paths of the second spiral flow channels 8 returning to the return channel 230 are separated from each other, thereby preventing the internal liquids of the second spiral flow channels 8 from interfering with each other when returning.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A heat roller with uniform temperature, characterized in that: include: An outer cylinder, a first end of which is sealed, and a second end of which is provided with a drain outlet; The inner cylinder is arranged in the outer cylinder, the inner cylinder and the outer cylinder are coaxially arranged, a first gap is formed between the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder, the inner cylinder is provided with a main flow channel along its axis, the main flow channel extends from the end surface of the inner cylinder close to the drain outlet to the middle part of the inner cylinder along its axial direction, the inner cylinder is evenly provided with 2n sub-flow channels along its circumference in the middle part of the axial direction, n is an integer greater than or equal to 1, and the two ends of the sub-flow channels are respectively connected to the main flow channel and the first gap, the inner cylinder is provided with n return flow channels extending along its axial direction, a second gap is formed between the end surface of the first end and the inner cylinder, and a third gap is formed between the end surface of the second end and the inner cylinder, and the second gap and the third gap are both used to connect the return flow channel and the first gap; A plurality of spiral plates are disposed in the first gap, the outer cylinder, the inner cylinder, and the plurality of spiral plates enclose n first spiral flow channels and n second spiral flow channels, one end of the first spiral flow channel is connected to the sub-flow channel, and the other end of the first spiral flow channel extends toward the first end, one end of the second spiral flow channel is connected to the sub-flow channel, and the other end of the second spiral flow channel extends toward the second end, and the n first spiral flow channels and the n second spiral flow channels are staggeredly distributed in sequence along the circumference of the inner cylinder; as well as A plurality of partitions are respectively used to block ends of the first spiral flow channel and the second spiral flow channel close to the sub-flow channel.

2. The temperature-uniform heating roller according to claim 1, characterized in that: A diameter of the sub-flow channel communicating with the first spiral flow channel is larger than a diameter of the sub-flow channel communicating with the second spiral flow channel.

3. The temperature-uniform heating roller according to claim 1, characterized in that: The thickness of the spiral plate gradually decreases from a side close to the inner cylinder to a side close to the outer cylinder.

4. The temperature-uniform heating roller according to claim 3, characterized in that: The cross section of the spiral plate is an isosceles trapezoid.

5. The temperature-uniform heating roller according to any one of claims 1 to 4, characterized in that: The main channel is externally connected to a water inlet pipe, the drain outlet is externally connected to a drain pipe, and the water inlet pipe is arranged in the drain pipe.

6. The temperature-uniform heating roller according to any one of claims 1 to 4, characterized in that: The n is 4.

7. The temperature-uniform heating roller according to any one of claims 1 to 4, characterized in that: A rotating shaft is provided on the end surface of the first end and the end surface of the second end.

8. The temperature-uniform heating roller according to any one of claims 1 to 4, characterized in that: A plurality of n first baffles are provided in the second gap, and the n first baffles divide the second gap into n first connecting flow channels, and each of the first connecting flow channels is connected to a first spiral flow channel and a return flow channel.

9. The temperature-uniform heating roller according to any one of claims 1 to 4, characterized in that: A plurality of n second baffles are provided in the third gap, and the n second baffles divide the third gap into n second connecting flow channels, and each of the second connecting flow channels is connected to a second spiral flow channel and a return flow channel.

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