A heating roller and a rolling apparatus

Abstract

The application relates to the field of heating rollers, and discloses a heating roller shaft and a rolling equipment. The heating roller shaft comprises a roller shaft, an electric heating element, a rotary driving assembly and a vane. The roller shaft is provided with a liquid passing channel along the axis of the roller shaft. The liquid passing channel has a backflow end and a driving end. The roller shaft is circumferentially provided with at least one circulation channel along the axis of the roller shaft. The circulation channel has a liquid inlet end and a liquid return end. The liquid inlet end is communicated with the driving end, and the liquid return end is communicated with the backflow end. The electric heating element is arranged in the liquid passing channel. The rotary driving assembly is arranged at the end of the roller shaft. The rotary driving assembly has a rotary end. The vane is arranged at the rotary end. The vane is located at the driving end of the liquid passing channel. According to the application, the electric heating element is directly arranged in the liquid passing channel of the roller shaft. The rotary driving assembly drives the vane to make the heat-conducting oil circulate in the passage formed by the liquid passing channel and the circulation channel. The built-in heating without external oil temperature machine is realized. The problems of large equipment occupation, serious heat energy loss and high oil leakage risk are solved.

Description

Technical Field

[0001] This application relates to the field of heating rollers, and more particularly to a heating roller shaft and a rolling device. Background Technology

[0002] In the manufacturing process of lithium-ion battery electrodes, the rolling process has a crucial impact on the compaction density and surface quality of the electrodes. As the core component of the rolling equipment, the performance of the heating method of the roller directly determines the forming quality of the electrode. Currently, the common roller heating methods mainly include electric heating and oil heating. Although electric heating has a rapid response, it suffers from poor heating uniformity and is prone to large temperature differences on the roller surface, making it difficult to ensure temperature consistency, especially in large-diameter applications. While oil heating offers relatively uniform temperature distribution, it relies on an external oil temperature controller, resulting in drawbacks such as large equipment footprint, significant heat loss, high risk of oil leakage, and high maintenance costs. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a heating roller and a rolling device.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides: A heating roller shaft, comprising: A roller shaft has a liquid passage along its axis, the liquid passage having a return end and a drive end. The roller shaft also has at least one circulation channel circumferentially arranged along its axis, the circulation channel having an inlet end and a return end, the inlet end communicating with the drive end and the return end communicating with the return end. An electric heating element is disposed in the liquid passage, and the electric heating element has a through hole extending through it along the axial direction; A rotary drive assembly is disposed at the end of the roller shaft, the rotary drive assembly having a rotating end disposed in the liquid passage; The blade is disposed at the rotating end and is located at the driving end of the liquid passage.

[0005] Furthermore, the roller shaft includes a roller body, and the roller body has a first roller neck and a second roller neck respectively at both ends along its axial direction. The rotation drive assembly is disposed on the end face of the first roller neck or the end face of the second roller neck.

[0006] Furthermore, the liquid passage includes a mounting hole at the central axis of the liquid passage, a return hole in the first roller neck, and a liquid passage hole in the second roller neck. The mounting hole is connected to the return hole and the liquid passage hole, and the heating element is disposed in the mounting hole.

[0007] Furthermore, the circulation channel includes a circulation hole, a first connecting groove, and a second connecting groove. The circulation hole is opened in the circumferential direction of the roller body axis. The first connecting groove is opened at one axial end of the roller body and communicates with the return hole. The second connecting groove is opened at the end of the roller body opposite to the first connecting groove and communicates with the liquid passage hole.

[0008] Furthermore, the circulation hole includes a first hole, a second hole, and a third hole that are circumferentially spaced along the axis of the roller body. A first slot is provided at one end of the roller body in the axial direction. The first slot communicates with the first hole and the second hole respectively. The end of the first hole that is away from the first slot communicates with the first connecting groove. The roller body has a second slot at the end axially opposite to the first slot. The second slot is connected to both the second hole and the third hole. The end of the third hole opposite to the second slot is connected to the second connecting groove.

[0009] Furthermore, the rotary drive assembly includes a gear ring connected to the first roller neck or the second roller neck, a drive shaft rotatably mounted on the gear ring, a first gear being provided at one end of the drive shaft, the blade being provided at the end of the drive shaft opposite to the first gear, a second gear being provided between the first gear and the gear ring, the second gear meshing with both the gear ring and the drive shaft, and a fixing plate being connected to the shaft of the second gear.

[0010] Furthermore, a fixing tube is also provided in the mounting hole. The fixing tube has a central hole that extends through it along its axial direction. The heating element is sleeved on the fixing tube. A first fixing ring and a second fixing ring are also sleeved on the fixing tube. The heating element is located between the first fixing ring and the second fixing ring.

[0011] Furthermore, at least one clearance hole is provided on the first fixing ring, and the heating element is electrically connected to a power supply line, which passes through the clearance hole.

[0012] Furthermore, a heating gap is formed between the heating element and the inner wall of the mounting hole, and the heating gap is connected to the return hole through the clearance hole.

[0013] This application also provides a roller pressing device, comprising: The heating roller shaft described in any one of the above statements; The heating roller shaft is rotatably mounted on the frame.

[0014] This application achieves built-in heating without the need for an external oil temperature controller by directly embedding the heating element in the liquid passage of the roller and using a rotary drive assembly to drive the blades to circulate the heat transfer oil in the passage formed by the liquid passage and the circulation channel. This solves the problems of large equipment footprint, serious heat loss and high risk of oil leakage, while improving heating uniformity, reducing roller surface temperature difference and ensuring the forming quality of the electrode sheets.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic cross-sectional view of the heating roller shaft of this application is shown; Figure 2 A schematic diagram of the overall structure of the heating roller shaft of this application is shown; Figure 3 This shows a schematic diagram of the first radial cross-sectional structure of the heating roller shaft of this application; Figure 4 This shows a schematic diagram of the second radial cross-sectional structure of the heating roller shaft of this application; Figure 5 A schematic diagram of the loop channel structure of this application is shown; Figure 6 A schematic diagram of the circulation hole structure of this application is shown; Figure 7 This paper shows a schematic diagram of the structure of the heating element, the fixed tube, and the rotary drive assembly in their mating state. Figure 8 The diagram shows the structure of the heating element, fixed tube, and rotary drive assembly in an exploded state.

[0018] Explanation of key component symbols: 100-Roller shaft; 110-Roller body; 120-First roller neck; 130-Second roller neck; 101-Liquid passage; 1011-Mounting hole; 1012-Return hole; 1013-Liquid passage hole; 102-Circulation channel; 1021-Circulation hole; 10211-First hole body; 10212-Second hole body; 10213-Third hole body; 10214-First slot; 10215-Second slot; 1022-First connecting groove; 1023-Second connecting groove; 200-Heating element; 210-Power supply line; 300-Rotary drive assembly; 310-Gear ring; 320-Drive shaft; 330-First gear; 340-Second gear; 350-Fixing plate; 400-Blade; 500-Fixing tube; 610-First fixing ring; 611-Allowing hole; 620-Second fixing ring. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] This application provides a heating roller shaft including a roller shaft 100, an electric heating element 200, a rotary drive assembly 300, and blades 400. Specifically, the roller shaft 100 has a liquid passage 101 along its axis, the liquid passage 101 having a return end and a drive end. The roller shaft 100 has at least one circulation channel 102 circumferentially arranged along its axis, the circulation channel 102 having an inlet end and a return end, the inlet end communicating with the drive end, and the return end communicating with the return end. The electric heating element 200 is disposed in the liquid passage 101, the electric heating element 200 having a through hole extending through it axially. The rotary drive assembly 300 is disposed at the end of the roller shaft 100, the rotary drive assembly 300 having a rotating end disposed in the liquid passage 101, and blades 400 disposed at the rotating end, the blades 400 being located at the drive end of the liquid passage 101.

[0025] Please see Figure 1 and Figure 2 As shown, when the roller 100 rotates, the blades 400 can be driven to rotate by the rotary drive assembly 300. Under the action of the blades 400, the heat transfer oil (heat transfer medium) can circulate in the passage formed by the liquid passage 101 and the circulation channel 102. Specifically, the blades 400 deliver the heat transfer oil from the drive end of the liquid passage 101 to the inlet end of the circulation channel 102, and then, under the guidance of the circulation channel 102, deliver it from its return end to the return end of the liquid passage 101. Finally, the heat transfer oil flows back into the liquid passage 101. The above heat transfer oil delivery path is repeated to evenly transfer heat to the roller 100, thereby heating the roller 100.

[0026] It is understandable that when the heat transfer oil flows through the liquid channel 101, the electric heating element 200 inside the liquid channel 101 heats the heat transfer oil, thereby eliminating the problem of large equipment space occupation and serious heat loss caused by the reliance on oil temperature controller in the existing heat transfer oil system.

[0027] In this embodiment, the roller 100 is provided with a plurality of circulation channels 102, and the plurality of circulation channels 102 are evenly spaced along the axis of the roller 100 in its circumference. When the heat transfer oil passes through the circulation channels 102, it can evenly transfer heat to the roller 100, thereby heating the material passing through the circumference of the roller 100.

[0028] In this embodiment, the heating element 200 is a component that can convert electrical energy into heat energy. In practice, it can be selected according to needs, and there is no limitation in this embodiment. Furthermore, in order to improve heating efficiency, the contact area between the heat transfer oil and the heating element 200 can be increased. For this purpose, a through hole is opened in the center of the heating element 200, that is, the heat transfer oil flows through the through hole, thereby heating the heat transfer oil passing through the through hole. For this purpose, the heating element 200 is a circular tube set in the liquid passage 101.

[0029] In some embodiments, the roller 100 includes a roller body 110, and the roller body 110 has a first roller neck 120 and a second roller neck 130 respectively at both ends along its axial direction. The rotation drive assembly 300 is disposed on the end face of the first roller neck 120 or the end face of the second roller neck 130.

[0030] like Figure 1 and Figure 2 As shown, in order to install the entire roller 100, the roller 100 is divided into three sections. The two ends of the roller body 110 are respectively provided with a first roller neck 120 and a second roller neck 130. In order to facilitate the opening of channels in the roller body 110, the first roller neck 120 and the second roller neck 130, the roller body 110, the first roller neck 120 and the second roller neck 130 can be designed separately. That is, the first roller neck 120 and the second roller neck 130 can be fixed to the ends of the roller body 110 by flanges or bolts.

[0031] Specifically, during operation, the outer circumferential surface of the roller body 110 is generally the working surface, while the first roller neck 120 and the second roller neck 130 are rotatably mounted on the frame, so that the entire roller shaft 100 can rotate.

[0032] For example, the rotary drive assembly 300 may be selectively disposed on the end face of the first roller neck 120 or the second roller neck 130. In this embodiment, the rotary drive assembly 300 is disposed on the end face of the second roller neck 130, and the following description is given with the rotary drive assembly 300 disposed on the end face of the second roller neck 130.

[0033] In some embodiments, the liquid passage 101 includes a mounting hole 1011 opened at the central axis of the liquid passage 101, a return hole 1012 opened in the first roller neck 120, and a liquid passage hole 1013 opened in the second roller neck 130. The mounting hole 1011 communicates with the return hole 1012 and the liquid passage hole 1013, and the heating element 200 is disposed in the mounting hole 1011.

[0034] Please continue reading. Figure 1 and Figure 2 As shown, a mounting hole 1011 is provided on the central axis of the roller body 110, a return hole 1012 is provided on the first roller neck 120, and a liquid passage hole 1013 is provided on the second roller neck 130. The mounting hole 1011, the return hole 1012, and the liquid passage hole 1013 are coaxially arranged and connected to form a liquid passage channel 101. The liquid inlet end of the circulation channel 102 is connected to the liquid passage hole 1013, and the liquid return end of the circulation channel 102 is connected to the return hole 1012.

[0035] In this embodiment, the blade 400 is disposed in the liquid passage hole 1013. That is, the blade 400 rotates to transport the heat transfer oil in the mounting hole 1011 to the liquid passage hole 1013, and then transports the heat transfer oil in the liquid passage hole 1013 to the liquid inlet end of the circulation channel 102. The heat transfer oil is transported to the liquid return end in the path of the circulation channel 102. Next, the heat transfer oil flows back to the return hole 1012. As the blade 400 continues to rotate, the heat transfer oil in the return hole 1012 is transported to the mounting hole 1011, thereby realizing the circulation of heat transfer oil and continuously heating the circumferential surface of the roller body 110.

[0036] In some embodiments, the circulation channel 102 includes a circulation hole 1021, a first connecting groove 1022, and a second connecting groove 1023. The circulation hole 1021 is formed in the circumferential direction of the roller body 110 axis. The first connecting groove 1022 is formed at one axial end of the roller body 110 and communicates with the return hole 1012. The second connecting groove 1023 is formed at the end of the roller body 110 away from the first connecting groove 1022 and communicates with the liquid passage hole 1013.

[0037] Please see Figure 1 , Figure 3 as well as Figure 4As shown, the circulation hole 1021 is located circumferentially along the axis of the roller body 110. Therefore, the circulation hole 1021 is not coaxial with the mounting hole 1011, the return hole 1012, and the liquid passage hole 1013. In order to connect the two ends of the circulation hole 1021 to the return hole 1012 and the liquid passage hole 1013 respectively, a first connecting groove 1022 is radially opened inside one end of the roller body 110, so that the circulation hole 1021 is connected to the mounting hole 1011 and the return hole 1012 through the first connecting groove 1022. Similarly, a second connecting groove 1023 is radially opened at the other end of the roller body 110 away from the first connecting groove 1022, so that the circulation hole 1021 is connected to the mounting hole 1011 and the liquid passage hole 1013 through the second connecting groove 1023.

[0038] It is understandable that the circulation hole 1021, the first connecting groove 1022, the mounting hole 1011, and the second connecting groove 1023 form a circulation path. When the blade 400 rotates, the heat transfer oil inside it circulates. In conjunction with the electric heating element 200, the heat transfer oil flowing through it is heated, and the heat from heating the heat transfer oil is continuously transferred to the roller body 110. Furthermore, the fact that the entire heat transfer oil is circulating makes the heating more uniform.

[0039] In some embodiments, the circulation hole 1021 includes a first hole 10211, a second hole 10212, and a third hole 10213 that are circumferentially spaced along the axis of the roller body 110. A first slot 10214 is formed at one axial end of the roller body 110. The first slot 10214 communicates with the first hole 10211 and the second hole 10212 respectively. The end of the first hole 10211 away from the first slot 10214 communicates with the first connecting groove 1022. A second slot 10215 is formed at the end of the roller body 110 away from the first slot 10214. The second slot 10215 communicates with both the second hole 10212 and the third hole 10213. The end of the third hole 10213 away from the second slot 10215 communicates with the second connecting groove 1023.

[0040] To improve heat transfer efficiency, each circulation hole 1021 can have multiple axial holes, thereby increasing the path distance of the heat transfer oil and fully transferring the heat of the heat transfer oil to the roller 110.

[0041] Please see Figure 3 , Figure 4 , Figure 5 as well as Figure 6As shown, in this embodiment, the circulation hole 1021 has three holes, namely, a first hole 10211, a second hole 10212, and a third hole 10213, which are equally spaced. Furthermore, to allow the three holes to connect, a first slot 10214 and a second slot 10215 are formed in the roller body 110. The first hole 10211 and the second hole 10212 are connected through the first slot 10214, and the second hole 10212 and the third hole 10213 are connected through the first slot 10214. 0213 is connected through the second slot 10215, thereby connecting the first hole 10211, the second hole 10212 and the third hole 10213. Furthermore, in order to connect with the mounting hole 1011, the first hole 10211 is connected to the mounting hole 1011 and the liquid passage hole 1013 through the second connecting groove 1023, and the third hole 10213 is connected to the mounting hole 1011 and the return hole 1012 through the first connecting groove 1022.

[0042] In this embodiment, the first hole 10211, the second hole 10212, and the third hole 10213 are generally serpentine in shape, which increases the flow length of the heat transfer oil and fully transfers the heat of the heat transfer oil to the roller 110.

[0043] In some embodiments, the rotary drive assembly 300 includes a gear ring 310 connected to a first roller neck 120 or a second roller neck 130. A drive shaft 320 is rotatably mounted on the gear ring 310. A first gear 330 is provided at one end of the drive shaft 320. A blade 400 is provided at the end of the drive shaft 320 away from the first gear 330. A second gear 340 is provided between the first gear 330 and the gear ring 310. The second gear 340 meshes with both the gear ring 310 and the drive shaft 320 for transmission. A fixing plate 350 is connected to the shaft of the second gear 340.

[0044] Please see Figure 1 , Figure 2 , Figure 7 as well as Figure 8 As shown, in this embodiment, the rotational force of the roller 100 rotating through the rotation drive assembly 300 is transmitted to the blade 400.

[0045] Specifically, the toothed ring 310 is fixedly mounted on the end face of the second roller neck 130. The toothed ring 310 has a central annular groove that does not penetrate the toothed ring 310. The inner circumferential surface of the annular groove has multiple teeth evenly spaced. The drive shaft 320 is rotatably mounted at the center of the toothed ring 310, and the end of the drive shaft 320 extends into the liquid passage hole 1013 or the mounting hole 1011. Furthermore, a first gear 330 is also provided at the center of the toothed ring 310 and mounted on the drive shaft 320. That is, the first gear 330 rotates synchronously with the drive shaft 320. A second gear 340 is also provided in the annular groove. The second gear 340 meshes with the first gear 330 and the teeth of the annular groove, respectively. The fixing plate 350 at the end of the shaft of the second gear 340 is fixedly connected to the frame.

[0046] It is understandable that when the roller 100 rotates, it can drive the second gear 340 to rotate through the teeth of the gear ring 310. Since the second gear 340 is also meshed with the first gear 330, the second gear 340 transmits the rotational force from the gear ring 310 to the first gear 330, thereby also driving the first gear 330 to rotate, which in turn drives the blade 400 connected to the drive shaft 320 to rotate, driving the heat transfer oil in the entire pipeline to circulate.

[0047] In some embodiments, a fixing tube 500 is further provided in the mounting hole 1011. The fixing tube 500 has a central hole that extends through it along its axial direction. The heating element 200 is sleeved on the fixing tube 500. A first fixing ring 610 and a second fixing ring 620 are also sleeved on the fixing tube 500. The heating element 200 is located between the first fixing ring 610 and the second fixing ring 620.

[0048] Please see Figure 1 , Figure 7 as well as Figure 8 As shown, in order to fix the heating element 200 in the mounting hole 1011, the heating element 200 is first sleeved on the circumferential surface of the fixing tube 500, and then the fixing tube 500 is placed in the mounting hole 1011. At the same time, the fixing tube 500 is also provided with a first fixing ring 610 and a second fixing ring 620, and the heating element 200 is located between the first fixing ring 610 and the second fixing ring 620. In this way, the position of the heating element 200 is limited by the first fixing ring 610 and the second fixing ring 620, preventing the heating element 200 from moving axially and dislodging from the mounting hole 1011.

[0049] In this embodiment, the two ends of the fixed tube 500 extend into the return hole 1012 and the liquid passage hole 1013, respectively. At this time, the blade 400 is located in the central hole of the fixed tube 500. In this state, the heating element 200 transfers heat to the fixed tube 500, and then transfers the heat to the heat-conducting oil flowing through its central hole through the fixed tube 500, thereby achieving heat transfer. The fixed tube 500 extends into the return hole 1012 and the liquid passage hole 1013 to heat the first roller neck 120 and the second roller neck 130, thereby reducing the temperature difference between the first roller neck 120, the second roller neck 130 and the roller body 110, and reducing the overall tilting caused by thermal expansion and contraction due to large temperature differences.

[0050] Understandably, in order to prevent the heating element 200 from moving relative to the mounting hole 1011, the outer circular surfaces of the first fixing ring 610 and the second fixing ring 620 can be tightly fitted with the inner circumferential surface of the mounting hole 1011. Specifically, the fixing tube 500 can be fixed in the mounting hole 1011 by means of an interference fit. Correspondingly, the inner circular surfaces of the first fixing ring 610 and the second fixing ring 620 can also be connected with the outer circumferential surface of the fixing tube 500 by means of an interference fit.

[0051] In some embodiments, at least one clearance hole 611 is provided on the first fixing ring 610, and the heating element 200 is electrically connected to a power supply line 210, which passes through the clearance hole 611.

[0052] Please see Figure 1 , Figure 7 as well as Figure 8 As shown, since the heating element 200 requires an external power supply, the external power needs to be transmitted to the heating element 200 through the power supply line 210. In order for the power supply line 210 to pass smoothly through the first fixing ring 610 and connect to the heating element 200, at least one clearance hole 611 is opened on the first fixing ring 610 through which the power supply line 210 passes. The power supply line 210 should also pass through the first roller neck 120 and extend to the outside to connect with the external power supply. It is understood that the connection between the power supply line 210 and the first roller neck 120 should be sealed, and the temperature of the heat transfer oil should not damage the power supply line 210 to prevent the power supply line 210 from being damaged and short-circuiting, thus preventing it from supplying power to the heating element 200.

[0053] Since the entire roller 100 is rotating, the power supply line 210 should be connected to an external power source using components such as an electric rotary connector, so as to provide electrical energy to the heating element 200 during the rotation of the roller 100.

[0054] In some embodiments, the heating element 200 forms a heating gap with the inner wall of the mounting hole 1011, and the heating gap communicates with the return hole 1012 through the clearance hole 611.

[0055] Please continue reading. Figure 1 , Figure 7 as well as Figure 8 As shown, since the heating element 200 is tubular, both the inner and outer rings of the heating element 200 generate heat. In order to prevent the heating element 200 from directly contacting the inner circumferential surface of the mounting hole 1011 and causing uneven heat transfer due to uneven contact, the wall thickness of the heating element 200 is adjusted so that a heating gap is formed between its outer circumferential surface and the inner circumferential surface of the mounting hole 1011. The heat transfer oil is then transferred to the roller body 110 through the heat transfer oil, in conjunction with the clearance hole 611, so that the heat transfer oil can reach the heating gap.

[0056] In this embodiment, the first fixing ring 610 is provided with a plurality of clearance holes 611, so as to facilitate the entry and exit of heat transfer oil from the heating gap.

[0057] It should be noted that the second fixing ring 620 is completely closed, that is, there are no holes on the second fixing ring 620. The purpose of this design is to prevent the heat transfer oil from flowing through the heating gap from the return hole 1012 to the liquid passage hole 1013 without passing through the central hole of the fixing tube 500.

[0058] In this embodiment, the first fixing ring 610 and the second fixing ring 620 are preferably made of insulating and high-temperature resistant insulating materials. For example, Teflon material can be selected.

[0059] In this embodiment, it should be noted that since the volume of the heat transfer oil increases after heating, the pressure in the entire circulation pipeline also increases. Therefore, when injecting heat transfer oil into the circulation pipeline, there should be some space left, that is, the entire circulation pipeline should not be filled, so as to ensure that the pressure inside is within a safe range.

[0060] This embodiment also provides a rolling mill device, which includes a heating roller shaft and a frame as described above. The heating roller shaft is rotatably mounted on the frame. In order to realize the rolling function, at least two heating rollers should be provided on the frame. In practice, there should be multiple heating rollers to gradually roll the material to the required thickness. The number of heating rollers is not limited here.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A heating roller shaft, characterized in that, include: A roller (100) has a liquid passage (101) along its axis, the liquid passage (101) having a return end and a drive end, and at least one circulation channel (102) is provided circumferentially along its axis, the circulation channel (102) having an inlet end and a return end, the inlet end being connected to the drive end, and the return end being connected to the return end; A heating element (200) is disposed in the liquid passage (101) and has a through hole extending through it in the axial direction; A rotary drive assembly (300) is disposed at the end of the roller (100) and has a rotating end disposed in the liquid passage (101). Blade (400), the blade (400) is disposed at the rotating end, the blade (400) is located at the driving end of the liquid passage (101).

2. The heating roller shaft according to claim 1, characterized in that, The roller shaft (100) includes a roller body (110), and the roller body (110) has a first roller neck (120) and a second roller neck (130) respectively at both ends along its axial direction. The rotation drive assembly (300) is disposed on the end face of the first roller neck (120) or the end face of the second roller neck (130).

3. The heating roller shaft according to claim 2, characterized in that, The liquid passage (101) includes a mounting hole (1011) opened at the central axis of the liquid passage (101), a return hole (1012) opened in the first roller neck (120), and a liquid passage hole (1013) opened in the second roller neck (130). The mounting hole (1011) is connected to the return hole (1012) and the liquid passage hole (1013). The heating element (200) is disposed in the mounting hole (1011).

4. The heating roller shaft according to claim 3, characterized in that, The circulation channel (102) includes a circulation hole (1021), a first connecting groove (1022), and a second connecting groove (1023). The circulation hole (1021) is opened in the circumferential direction of the axis of the roller body (110). The first connecting groove (1022) is opened at one axial end of the roller body (110) and communicates with the return hole (1012). The second connecting groove (1023) is opened at the end of the roller body (110) away from the first connecting groove (1022) and communicates with the liquid passage hole (1013).

5. The heating roller shaft according to claim 4, characterized in that, The circulation hole (1021) includes a first hole (10211), a second hole (10212) and a third hole (10213) that are circumferentially spaced along the axis of the roller body (110). The roller body (110) has a first slot (10214) at one end in the axial direction. The first slot (10214) communicates with the first hole (10211) and the second hole (10212) respectively. The end of the first hole (10211) away from the first slot (10214) communicates with the first connecting groove (1022). The roller body (110) has a second slot (10215) at the end axially away from the first slot (10214). The second slot (10215) is connected to the second hole body (10212) and the third hole body (10213). The end of the third hole body (10213) away from the second slot (10215) is connected to the second connecting groove (1023).

6. The heating roller shaft according to claim 2, characterized in that, The rotary drive assembly (300) includes a gear ring (310) connected to the first roller neck (120) or the second roller neck (130). The gear ring (310) is rotatably mounted with a drive shaft (320). A first gear (330) is provided at one end of the drive shaft (320). The blade (400) is provided at the end of the drive shaft (320) away from the first gear (330). A second gear (340) is provided between the first gear (330) and the gear ring (310). The second gear (340) meshes with both the gear ring (310) and the drive shaft (320). The shaft of the second gear (340) is connected to a fixing plate (350).

7. The heating roller shaft according to claim 3, characterized in that, A fixing tube (500) is also provided inside the mounting hole (1011). The fixing tube (500) has a central hole that extends through it along its axial direction. The heating element (200) is sleeved on the fixing tube (500). A first fixing ring (610) and a second fixing ring (620) are also sleeved on the fixing tube (500). The heating element (200) is located between the first fixing ring (610) and the second fixing ring (620).

8. The heating roller shaft according to claim 7, characterized in that, The first fixing ring (610) has at least one clearance hole (611), and the heating element (200) is electrically connected to a power supply line (210), which passes through the clearance hole (611).

9. The heating roller shaft according to claim 8, characterized in that, The heating element (200) forms a heating gap with the inner wall of the mounting hole (1011), and the heating gap is connected to the return hole (1012) through the clearance hole (611).

10. A roller pressing device, characterized in that, include: Heating roller shaft as claimed in any one of claims 1 to 9; The heating roller shaft is rotatably mounted on the frame.

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