Laser drying device

Abstract

The laser drying device comprises a laser head, a drying oven, a flexible sealing assembly and an adjusting assembly, the drying oven is used for containing the material belt, a mounting opening is formed in one side of the drying oven, the laser head is arranged at the mounting opening, the adjusting assembly is connected to the laser head, and the flexible sealing assembly is connected to the laser head. The laser head is used for adjusting the light-emitting direction and focal length. Wherein the flexible sealing assembly comprises an expandable or contractible flexible sealing element, the flexible sealing element is arranged between the laser head and the mounting port, the flexible sealing element contracts before the adjustment of the adjusting assembly so as to form a gap between the laser head and the mounting port, and the flexible sealing element expands after the adjustment of the adjusting assembly so as to seal the laser head and the mounting port. According to the laser drying device, the problem that adjustability and sealing performance of the laser head in the laser drying device are difficult to be compatible is solved, the sealing performance of the whole structure of the laser drying device is guaranteed while the uniformity of laser irradiation is guaranteed, and important guarantee is provided for application of the laser drying technology.

Description

Technical Field

[0001] The invention relates to the technical field of battery manufacturing, and in particular to a laser drying device. Background Art

[0002] At present, lithium batteries are widely used in electronic products, vehicles, aerospace and other fields. After the coating process is completed, the material belt needs to be heated to evaporate the liquid in the slurry and transform it from liquid to solid. Traditional heating methods mainly rely on electric heating or steam heating technology. These technologies usually use air as a heat transfer medium, heat the cold air into hot air, and make the hot air flow through the surface of the pole piece to achieve a warming effect. However, in actual applications, the hot air has a large amount of heat loss during the transmission process, and the heat conduction efficiency of the hot air to the pole piece is relatively low.

[0003] In view of the limitations of traditional heating methods, laser drying technology came into being. It significantly improves the energy conversion efficiency by directly converting electrical energy into thermal energy. However, to achieve better results with laser drying technology, it is crucial to ensure that the energy irradiated by the laser to the surface of the material strip is uniform and consistent, which requires that high-precision parallelism must be maintained between the surface of the laser head and the surface of the material strip. In addition, the slurry will release harmful gases during the volatilization process, so the sealing of the overall structure has also become an indispensable element to ensure the cleanliness and safety of the production environment. In the laser drying device in the prior art, the adjustability and sealing of the laser head are difficult to be compatible, and it is difficult to simultaneously ensure the quality of the laser dried products and the cleanliness and safety of the production environment. Summary of the invention

[0004] The purpose of the present invention is to provide a laser drying device, aiming to solve the problem that the adjustability and sealing of the laser head of the laser drying device in the prior art are difficult to be compatible, and it is difficult to simultaneously ensure the quality of the laser dried product and the cleanliness and safety of the production environment.

[0005] The present invention provides a laser drying device for heating a material strip, comprising: a laser head, an oven, a flexible sealing component and an adjusting component, wherein the oven is used to place the material strip, a mounting port is provided on one side of the oven, the laser head is provided at the mounting port, and the adjusting component is connected to the laser head and is used to adjust the light emission direction and focal length of the laser head;

[0006] Wherein, the flexible sealing component includes an expandable or contractible flexible sealing member, and the flexible sealing member is arranged between the laser head and the mounting port. The flexible sealing member contracts before the adjustment of the adjustment component to form a gap between the laser head and the mounting port, and expands after the adjustment of the adjustment component to seal the laser head and the mounting port.

[0007] Optionally, the flexible sealing assembly further includes an outer sleeve and an inner sleeve, the outer sleeve is installed on the inner side of the mounting port, the inner sleeve is arranged on the outer side of the laser head and located on the inner side of the outer sleeve, and the flexible sealing member is arranged between the outer sleeve and the inner sleeve.

[0008] Optionally, a first groove is circumferentially provided on the outer side of the inner sleeve, and one side of the flexible seal is embedded in the first groove, and / or a second groove is circumferentially provided on the inner side of the outer sleeve, and the other side of the flexible seal is embedded in the second groove.

[0009] Optionally, the inner sleeve and / or the outer sleeve is / are circumferentially provided with a support plate, and the flexible sealing member is located above the support plate.

[0010] Optionally, the circumferential length of the flexible seal in the contracted state is smaller than the circumferential length of the first groove or the second groove.

[0011] Optionally, the flexible sealing member is a sealing ring, and an inflation cavity is provided in the sealing ring.

[0012] Optionally, the flexible sealing assembly further includes a control valve, which is connected to the inflation chamber and is used to control the inflation or deflation of the inflation chamber.

[0013] Optionally, the control valve is an electromagnetic reversing valve, which includes a first port, a second port and a third port, wherein the first port is connected to the inflation chamber, the second port is connected to the outside air, and the third port is connected to an air source.

[0014] Optionally, the adjustment component includes a focus adjustment device, and the focus adjustment device is used to drive the laser head to translate relative to the material belt.

[0015] Optionally, the adjustment component includes a first light direction adjustment device and a second light direction adjustment device, the first light direction adjustment device is used to drive the laser head to rotate on a first plane, and the second light direction adjustment device is used to drive the laser head to rotate on a second plane, and the second plane is perpendicular to the first plane.

[0016] The present invention discloses a laser drying device. The light emitting direction and focal length of a laser head are adjusted by an adjusting component, and the installation sealing between the laser head and an oven is controlled by a flexible sealing component. Before the adjusting component adjusts the laser head, the flexible sealing component is contracted to form a gap between the laser head and an installation opening, so that the laser head can be moved or rotated under control, so that the laser head can irradiate the material belt in the oven uniformly. After the adjusting component adjusts the laser head, the flexible sealing component is expanded to seal the laser head and the installation opening, so that the volatile materials in the oven cannot be dispersed, and the cleanliness and safety of the production environment are effectively guaranteed. Through the linkage cooperation of the adjusting component and the flexible sealing component, the problem of the compatibility between the adjustability and sealing of the laser head in the laser drying device is solved, and while ensuring the uniformity of laser irradiation, the sealing of the overall structure of the laser drying device is also guaranteed, providing important guarantee for the application of laser drying technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A three-dimensional perspective view of the laser drying device provided by the present invention;

[0019] Figure 2 A front perspective view of the laser drying device provided by the present invention;

[0020] Figure 3 A side sectional view of the laser drying device provided by the present invention;

[0021] Figure 4 for Figure 3 A is a schematic diagram of the partially enlarged structure of the middle part;

[0022] Figure 5 A schematic diagram of the matching structure of the laser head, the flexible sealing component and the adjustment component provided by the present invention;

[0023] Figure 6 A schematic diagram of another matching structure of the laser head, the flexible sealing component and the adjusting component provided by the present invention;

[0024] Figure 7 A schematic diagram of the matching structure of the flexible sealing member and the inner sleeve provided by the present invention in an expanded state;

[0025] Figure 8 for Figure 7 A schematic diagram of the partially enlarged structure of B in the middle;

[0026] Fig. 9A schematic diagram of the matching structure of the flexible sealing member and the inner sleeve provided by the present invention in a contracted state;

[0027] Fig.10 for Fig. 9 A schematic diagram of the partially enlarged structure of C in the middle;

[0028] Fig.11 A cross-sectional view of a laser head and a flexible sealing assembly provided by the present invention;

[0029] Fig.12 A schematic diagram of the three-dimensional structure of a first light direction adjusting device provided by the present invention;

[0030] Fig.13 A front view of a first light direction adjusting device provided by the present invention;

[0031] Fig.14 An exploded view of a first light direction adjusting device provided by the present invention;

[0032] Description of the symbols in the figure:

[0033] 1. Laser head; 2. Oven; 3. Flexible sealing assembly; 31. Flexible sealing member; 311. Inflatable cavity; 32. Outer set; 33. Inner set; 331. First groove; 34. Control valve; 35. Support plate; 4. Adjustment assembly; 41. Focus adjustment device; 411. Motion platform; 412. Servo motor; 42. First light direction adjustment device; 421. Rotating base plate; 422. Rotating plate; 423. Pointer; 424. Cross roller bearing; 425. Mandrel; 426. Locking column; 427. Handle; 43. Second light direction adjustment device; 5. Material belt; 6. Roller. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0036] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0037] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0038] See also Figure 1 and Figure 2 The embodiment of the present invention provides a laser drying device for heating a material strip 5, comprising: a laser head 1, an oven 2, a flexible sealing component 3 and an adjusting component 4. The oven 2 is used to place the material strip 5. A mounting port is provided on one side of the oven 2. The laser head 1 is provided at the mounting port. The adjusting component 4 is connected to the laser head 1 and is used to adjust the light emission direction and focal length of the laser head 1. Figure 3 and Figure 4 The flexible sealing component 3 includes an expandable or contractible flexible sealing member 31, which is disposed between the laser head 1 and the mounting port. The flexible sealing member 31 contracts before the adjusting component 4 is adjusted to form a gap between the laser head 1 and the mounting port, and expands after the adjusting component 4 is adjusted to seal the laser head 1 and the mounting port.

[0039] In this embodiment, the adjustment component 4 is provided to adjust the light emission direction and focal length of the laser head 1, and the flexible sealing component 3 is provided to control the installation sealing between the laser head 1 and the oven 2. Before the adjustment component 4 adjusts the laser head 1, the flexible sealing member 31 is contracted to form a gap between the laser head 1 and the installation port, so that the laser head 1 can be controlled to move or rotate, so that the laser head 1 can irradiate the material belt 5 in the oven 2 evenly; after the adjustment component 4 adjusts the laser head 1, the flexible sealing member 31 is expanded to seal the laser head 1 and the installation port, so that the volatile materials in the oven 2 cannot be dispersed, and the cleanliness and safety of the production environment are effectively ensured; through the linkage cooperation of the adjustment component 4 and the flexible sealing component 3, the problem of the incompatibility between the adjustability and sealing of the laser head 1 in the laser drying device is solved, and while ensuring the uniformity of laser irradiation, the sealing of the overall structure of the laser drying device is also guaranteed, providing important guarantee for the application of laser drying technology.

[0040] It should be noted that at least two rollers 6 for supporting and transporting the material belt 5 are arranged in the oven 2. The two rollers 6 support to form a stable plane. When the light emitting command is issued to the laser head 1, the light spot of the laser head 1 is irradiated onto the material belt 5, and the shape of the light spot of the laser head 1 irradiated onto the material belt 5 is observed and the irradiation direction of the laser head 1 is controlled by the adjustment component 4 until the shape of the light spot of the laser head 1 irradiated onto the material belt 5 reaches an ideal state, and the parallel adjustment action is completed. Then, the laser head 1 is driven to move closer to or away from the material belt 5 through the adjustment component 4 and the quality of the laser light spot irradiated onto the material belt 5 is observed, until the quality of the laser light spot irradiated onto the material belt 5 reaches the best, and the focusing action is completed. At this point, the adjustment action of the adjustment component 4 on the laser head 1 is completed.

[0041] Specifically, Figures 4 to 10 As shown, the flexible sealing assembly 3 also includes an outer sleeve 32 and an inner sleeve 33. The outer sleeve 32 is installed on the inner side of the mounting port, the inner sleeve 33 is arranged on the outer side of the laser head 1 and located on the inner side of the outer sleeve 32, and the flexible sealing member 31 is arranged between the outer sleeve 32 and the inner sleeve 33. When it is necessary to adjust the light emission direction or focal length of the laser head 1, the flexible sealing member 31 is in a contracted state, which enables the laser head 1 to move or rotate freely in the gap formed between the outer sleeve 32 and the inner sleeve 33 without any hindrance. Once the position and angle of the laser head 1 are adjusted, the flexible sealing member 31 is inflated to tightly close the gap between the inner sleeve 33 and the outer sleeve 32 to ensure that the material in the oven 2 will not leak into the external environment, thereby maintaining the cleanliness and safety of the production environment. It should be explained that in this embodiment, the gap between the outer sleeve 32 and the inner sleeve 33 is the gap between the laser head 1 and the mounting port.

[0042] Further, in order to prevent the flexible seal 31 from falling off during the adjustment process of the laser head 1, in a feasible embodiment, a first groove 331 is provided on the outer side of the inner sleeve 33 along the circumferential direction, and one side of the flexible seal 31 is embedded in the first groove 331, and / or a second groove is provided on the inner side of the outer sleeve 32 along the circumferential direction, and the other side of the flexible seal 31 is embedded in the second groove. It can be understood that the first groove 331 and the second groove are used to fix and support the flexible seal 31 to prevent it from being displaced or falling during the adjustment process, thereby further improving the sealing effect and preventing material leakage. When assembling the flexible sealing assembly 3, firstly, one side of the flexible seal 31 is embedded in the first groove 331 on the outer side of the inner sleeve 33, or / and the other side of the flexible seal 31 is embedded in the second groove on the inner side of the outer sleeve 32. Since the flexible seal 31 is tightly fixed by the groove, even during the adjustment process of the laser head 1, the flexible seal 31 will not be displaced or fall due to external force.

[0043] Specifically, the circumferential length of the flexible seal 31 in the contracted state is less than the circumferential length of the first groove 331 or the second groove. It should be explained that the flexible seal 31 is an elastic material with a certain degree of elasticity. In this embodiment, it can be directly stretched by a tool and then inserted into the first groove 331 of the inner sleeve 33. Since the circumferential length of the flexible seal 31 in the contracted state is less than the circumferential length of the first groove 331, the flexible seal 31 can be tightly enclosed in the first groove 331 in the contracted state.

[0044] Furthermore, in order to prevent the flexible seal 31 from falling off during the adjustment of the laser head 1, in another feasible embodiment, as Fig.11 As shown, the inner sleeve 33 and / or the outer sleeve 32 are provided with a support plate 35 along the circumferential direction, and the flexible seal 31 is located above the support plate 35. Preferably, the flexible seal 31 is adhesively connected to the support plate 35. In this embodiment, by providing the support plate 35, an additional support surface is provided for the flexible seal 31, which effectively prevents the risk of the flexible seal 31 falling off or shifting due to external force during the adjustment process, thereby improving the stability of the flexible seal 31.

[0045] Specifically, Figures 7 to 10 As shown, the flexible sealing member 31 is a sealing ring, and an air-filled cavity 311 is provided inside the sealing ring. Preferably, the sealing ring is made of rubber material, and can be elastically deformed when subjected to external force, so as to fit tightly to the sealing surface. The air-filled cavity 311 is provided inside the sealing ring, and the tightness of the sealing ring can be adjusted by inflation or deflation. When inflated, the sealing ring will expand and fit tightly to the sealing surface; when deflated, the sealing ring will return to its original state to release the gap between the laser head 1 and the mounting port.

[0046] Furthermore, the flexible sealing component 3 also includes a control valve 34, which is connected to the inflation chamber 311 and is used to control the inflation or deflation of the inflation chamber 311. It can be understood that the control valve 34 is a device capable of controlling the flow of fluid. In the flexible sealing component 3, the control valve 34 is designed to be connected to the inflation chamber 311, and allows or prevents gas from entering or leaving the inflation chamber 311 by opening or closing the valve. When inflation is required, the control valve 34 is opened to allow gas to enter the inflation chamber 311 through the pipeline, so that the sealing ring expands and fits tightly to the sealing surface; when deflation is required, the control valve 34 closes the air inlet channel and opens the exhaust channel, so that the gas in the inflation chamber 311 is discharged through the pipeline, thereby restoring the sealing ring to its original state.

[0047] Further, the control valve 34 is an electromagnetic reversing valve, which includes a first port, a second port and a third port. The first port is connected to the inflation chamber 311, the second port is connected to the outside air, and the third port is connected to the gas source. In this embodiment, the electromagnetic reversing valve is a device that uses electromagnetic force to control the movement of the valve core 34, thereby changing the flow direction of the fluid. When the electromagnet is energized, the electromagnetic force generated attracts the valve core to move, so that the first port is connected to the third port (or the second port), thereby realizing the inflation (or deflation) function; when the electromagnet is de-energized, the spring force resets the valve core, closes the current connection port, and may connect the first port to another port (or keep it closed), thereby realizing the deflation (or maintaining the inflation state) function. Optionally, the laser drying device of this embodiment also includes a control system, which is electrically connected to the control valve 34. When the control system is controlled by the staff, the conduction state of the control valve 34 is maintained or changed to realize the inflation state or deflation state of the flexible sealing component 3.

[0048] Further, such as Figure 5 and Figure 6 As shown, the adjustment component 4 includes a focus adjustment device 41, and the focus adjustment device 41 is used to drive the laser head 1 to translate relative to the material belt 5. Specifically, the focus adjustment device 41 is used to drive the laser head 1 to translate in the direction close to or away from the material belt 5. Optionally, the focus adjustment device 41 includes a screw motion module, and the laser head 1 is connected to the motion platform 411 of the screw motion module. When working, the control system sends a motion instruction to the servo motor 412 connected to the screw motion module, and the servo motor 412 rotates to drive the motion platform 411 of the screw motion module to move up and down, thereby driving the laser head 1 to move up and down. Optionally, there is an encoder in the servo motor 412, which can record and feedback the distance moved by the motion platform 411 in real time, and stop when the motion platform 411 moves a specified distance. Among them, the screw motion module is a standard product in the industry. By selecting a suitable servo motor 412, and then connecting the laser head 1 to the motion platform 411, the laser head 1 can be driven to move up and down in a straight line. In other embodiments, the screw motion module can be replaced by a synchronous belt module, a gear rack module, or a non-powered manual adjustment method, which will not be described in detail here.

[0049] Furthermore, the adjustment assembly 4 includes a first light direction adjustment device 42 and a second light direction adjustment device 43. The first light direction adjustment device 42 is used to drive the laser head 1 to rotate on a first plane, and the second light direction adjustment device 43 is used to drive the laser head 1 to rotate on a second plane, and the second plane is perpendicular to the first plane. After the laser head 1 is installed, the light direction adjustment devices on these two surfaces can be adjusted in turn until the light spot emitted by the laser is parallel to the material belt 5 below.

[0050] Optional, such as Fig.12 , Fig.13and Fig.14 As shown, the first light direction adjustment device 42 is connected to the motion platform 411 of the focus adjustment device 41, and includes a rotating base plate 421 and a rotating plate 422 rotatably connected to the rotating base plate 421. A pointer 423 is provided on the rotating plate 422, and an indicating scale is provided on the rotating base plate 421. The rotation angle of the rotating plate 422 relative to the rotating base plate 421 can be known by the cooperation between the pointer 423 and the indicating scale. The rotating base plate 421 and the rotating plate 422 are connected through a cross roller bearing 424. The cross roller bearing 424 is a kind of bearing, which can provide support and rotation for objects on both sides of the inner and outer rings. At the same time, a core shaft 425 is also provided between the rotating plate 422 and the rotating base plate 421. The core shaft 425 provides support and guidance for the rotating plate 422, and can accurately ensure the coaxiality of the rotating plate 422 and the cross roller bearing 424. Furthermore, the first light direction adjusting device 42 further includes a locking column 426 connected to the rotating base plate 421 and a handle 427 connected to the rotating plate 422. The locking column 426 and the rotating base plate 421 are locked by threads. When the angle adjustment is completed, the handle 427 can be rotated to cooperate with the locking column 426 to lock the rotating plate 422 and the rotating base plate 421 to prevent loosening, thereby completing the rotation adjustment function in a single direction. The rotation adjustment principle and structure of the second light direction adjusting device 43 are the same as those of the first light direction adjusting device 42, and will not be repeated here. It should be noted that the rotating base plate 421 of the first light direction adjusting device 42 is fixedly connected to the moving platform 411 of the focal length adjusting device 41, or the rotating base plate 421 of the first light direction adjusting device 42 is integrated with the moving platform 411 of the focal length adjusting device 41, and further, the rotating plate 422 of the first light direction adjusting device 42 is connected to the rotating base plate 421 of the second light direction adjusting device 43, and the rotating plate 422 of the second light direction adjusting device 43 is connected to the laser head 1. It should be noted here that there are many ways to adjust the rotation, such as using a hollow rotating platform, gear racks, worm gears, etc., which cannot be listed here one by one, but adjusting the parallelism by rotating the laser head 1 should be considered as the scope of this application.

[0051] In this embodiment, the first light direction adjusting device 42 and the second light direction adjusting device 43 are respectively responsible for adjusting the direction of the laser head 1 on two mutually perpendicular planes (i.e., the first plane and the second plane). Specifically, the first light direction adjusting device 42 and the second light direction adjusting device 43 both include a rotating base plate 421 and a rotating plate 422. The rotating plate 422 can rotate smoothly through a cross roller bearing 424 and a mandrel 425. The pointer 423 provided on the rotating plate 422 is combined with the indicating scale on the rotating base plate 421 to provide visual feedback of the rotation angle to ensure the accuracy of the adjustment. When the adjustment is completed, the cooperation of the locking column 426 and the handle 427 can lock the rotating plate 422 and the rotating base plate 421 to prevent loosening and ensure the durability of the adjustment result.

[0052] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0053] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive.

[0054] Inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A laser drying device for heating a material strip, characterized in that: include: A laser head, an oven, a flexible sealing component and an adjustment component. The oven is used to place the material strip. A mounting port is provided on one side of the oven. The laser head is provided at the mounting port. The adjustment component is connected to the laser head and is used to adjust the light emission direction and focal length of the laser head. Wherein, the flexible sealing component includes an expandable or contractible flexible sealing member, and the flexible sealing member is arranged between the laser head and the mounting port. The flexible sealing member contracts before the adjustment of the adjustment component to form a gap between the laser head and the mounting port, and expands after the adjustment of the adjustment component to seal the laser head and the mounting port.

2. The laser drying device according to claim 1, characterized in that: The flexible sealing assembly also includes an outer sleeve and an inner sleeve, wherein the outer sleeve is installed on the inner side of the mounting opening, the inner sleeve is arranged on the outer side of the laser head and located on the inner side of the outer sleeve, and the flexible sealing member is arranged between the outer sleeve and the inner sleeve.

3. The laser drying device according to claim 2, characterized in that: A first groove is circumferentially provided on the outer side of the inner sleeve, and one side of the flexible seal is embedded in the first groove, and / or a second groove is circumferentially provided on the inner side of the outer sleeve, and the other side of the flexible seal is embedded in the second groove.

4. The laser drying device according to claim 2, characterized in that: The inner sleeve and / or the outer sleeve is / are circumferentially provided with a supporting plate, and the flexible sealing member is located above the supporting plate.

5. The laser drying device according to claim 3, characterized in that: The circumferential length of the flexible seal in the contracted state is smaller than the circumferential length of the first groove or the second groove.

6. The laser drying device according to claim 2, characterized in that: The flexible sealing member is a sealing ring, and an air-filled cavity is arranged inside the sealing ring.

7. The laser drying device according to claim 6, characterized in that: The flexible sealing assembly further comprises a control valve, which is connected to the inflation chamber and is used for controlling the inflation or deflation of the inflation chamber.

8. The laser drying device according to claim 7, characterized in that: The control valve is an electromagnetic reversing valve, which includes a first port, a second port and a third port. The first port is connected to the inflation chamber, the second port is connected to the outside air, and the third port is connected to the air source.

9. The laser drying device according to claim 1, characterized in that: The adjustment component includes a focus adjustment device, and the focus adjustment device is used to drive the laser head to translate relative to the material belt.

10. The laser drying device according to claim 1, characterized in that: The adjustment assembly includes a first light direction adjustment device and a second light direction adjustment device, the first light direction adjustment device is used to drive the laser head to rotate on a first plane, and the second light direction adjustment device is used to drive the laser head to rotate on a second plane, and the second plane is perpendicular to the first plane.

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