A laser drying apparatus

Abstract

The application discloses a kind of laser drying devices, for heating material belt, laser drying device includes: laser head, oven, flexible sealing component and adjusting assembly, oven is used to place material belt, one side of oven is provided with mounting port, laser head is set at mounting port, adjusting assembly is connected to laser head, for adjusting the light direction and focal length of laser head;Wherein, flexible sealing component includes inflatable or contractible flexible seal, flexible seal is located between laser head and mounting port, flexible seal is contracted to form gap between laser head and mounting port before adjusting assembly adjustment, and after adjusting assembly adjustment, it is inflated to make laser head and mounting port sealed between each other.The application solves the problem that adjustability and sealing difficulty of laser head in laser drying device are compatible, while ensuring the uniformity of laser irradiation, also guarantee the sealing of the overall structure of laser drying device, provide important guarantee for the application of laser drying technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing, in particular to a laser drying device. BACKGROUND

[0002] At present, lithium batteries are widely used in the fields of electronic products, vehicles, aerospace, etc. After the coating process is completed, the material belt needs to be heated to make the liquid in the slurry volatilize and change from liquid to solid. The traditional heating method mainly relies on electric heating or steam heating technology. These technologies usually use air as the heat transfer medium, convert cold air into hot air, and make the hot air flow through the surface of the pole piece to achieve the effect of heating. However, in actual application, there is a lot of heat loss in the transmission process of the hot air, and the heat conduction efficiency of the hot air to the pole piece is relatively low.

[0003] In view of the limitations of the traditional heating method, laser drying technology emerges as the times require. It converts electric energy into heat energy directly, which significantly improves the energy conversion efficiency. However, to achieve better results of laser drying technology, it is crucial to ensure that the energy of laser irradiation to the surface of the material belt is uniform and consistent, which requires that the parallelism between the surface of the laser head and the surface of the material belt must be maintained with high precision. In addition, harmful gases will be released during the volatilization of the slurry, so the sealing property of the overall structure also becomes an indispensable element to ensure the cleanliness and safety of the production environment. The laser drying device in the prior art cannot simultaneously ensure the adjustability and sealing property of the laser head, and cannot simultaneously ensure the quality of the laser drying product and the cleanliness and safety of the production environment. SUMMARY

[0004] The purpose of the present application is to provide a laser drying device, which aims to solve the problem that the adjustability and sealing property of the laser head of the laser drying device in the prior art are difficult to be compatible, and the quality of the laser drying product and the cleanliness and safety of the production environment are difficult to be ensured simultaneously.

[0005] The present application provides a laser drying device for heating a material belt, which comprises a laser head, an oven, a flexible sealing assembly and an adjusting assembly. The oven is used to place the material belt. One side of the oven is provided with a mounting port, and the laser head is arranged at the mounting port. The adjusting assembly is connected to the laser head and used to adjust the light direction and focal length of the laser head.

[0006] The flexible sealing assembly comprises a flexible sealing member which can expand or contract. The flexible sealing member is arranged between the laser head and the mounting port. The flexible sealing member is contracted before the adjusting assembly is adjusted to form a gap between the laser head and the mounting port, and is expanded after the adjusting assembly is adjusted to seal between the laser head and the mounting port.

[0007] Optionally, the flexible sealing assembly further comprises an outer sleeve and an inner sleeve, the outer sleeve is mounted inside the mounting port, the inner sleeve is arranged outside the laser head and inside the outer sleeve, and the flexible sealing member is arranged between the outer sleeve and the inner sleeve.

[0008] Optionally, the outer side of the inner sleeve is provided with a first groove in the circumferential direction, one side of the flexible sealing member is embedded in the first groove, and / or the inner side of the outer sleeve is provided with a second groove in the circumferential direction, the other side of the flexible sealing member is embedded in the second groove.

[0009] Optionally, the inner sleeve and / or the outer sleeve is provided with a supporting plate in the circumferential direction, and the flexible sealing member is arranged above the supporting plate.

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

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

[0012] Optionally, the flexible sealing assembly further comprises a control valve, the control valve is communicated with the inflation cavity, and is used for controlling inflation or deflation of the inflation cavity.

[0013] Optionally, the control valve is an electromagnetic reversing valve, the electromagnetic reversing valve comprises a first port, a second port and a third port, the first port is communicated with the inflation cavity, the second port is communicated with external air, and the third port is communicated with a gas source.

[0014] Optionally, the adjusting assembly comprises a focal length adjusting device, the focal length adjusting device is used for driving the laser head to translate relative to the material belt.

[0015] Optionally, the adjusting assembly comprises a first light direction adjusting device and a second light direction adjusting device, the first light direction adjusting device is used for driving the laser head to rotate in a first plane, the second light direction adjusting device is used for driving the laser head to rotate in a second plane, and the second plane is perpendicular to the first plane.

[0016] The application discloses a laser drying device, which adjusts the light direction and focal length of a laser head through an adjusting assembly, controls the installation sealing property between the laser head and an oven through a flexible sealing assembly, contracts the flexible sealing member before the adjusting assembly adjusts the laser head to form a gap between the laser head and the installation port, so that the laser head is controlled to move or rotate, and the laser head irradiates the material belt in the oven uniformly; expands the flexible sealing member after the adjusting assembly adjusts the laser head to seal the laser head and the installation port, so that the volatile material in the oven cannot be discharged, effectively ensures the cleanness and safety of the production environment; through the linkage and cooperation of the adjusting assembly and the flexible sealing assembly, the problem that the adjustability and the sealing property of the laser head in the laser drying device are difficult to be compatible is solved, the sealing property of the overall structure of the laser drying device is ensured while the uniformity of the laser irradiation is ensured, and important guarantee is provided for the application of the laser drying technology. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A perspective view of the laser drying device provided by the present application is provided.

[0019] Figure 2 A front perspective view of the laser drying device provided by the present application is provided.

[0020] Figure 3 A side sectional view of the laser drying device provided by the present application is provided.

[0021] Figure 4 A cooperation structure schematic diagram of the laser head and the flexible sealing assembly and the adjusting assembly provided by the present application is provided. Figure 3 A local enlarged structure schematic diagram of A in the present application is provided.

[0022] Figure 5 A cooperation structure schematic diagram of the laser head and the flexible sealing assembly and the adjusting assembly provided by the present application is provided.

[0023] Figure 6 Another cooperation structure schematic diagram of the laser head and the flexible sealing assembly and the adjusting assembly provided by the present application is provided.

[0024] Figure 7 A cooperation structure schematic diagram of the flexible sealing member and the inner sleeve in the expanded state provided by the present application is provided.

[0025] Figure 8 A local enlarged structure schematic diagram of B in the present application is provided. Figure 7

[0026] Figure 9 ​The schematic view of the cooperation structure of the flexible sealing member and the inner sleeve in the shrinkage state provided by the present application;

[0027] Figure 10 For Figure 9 The schematic view of the local amplification structure of the C;

[0028] Figure 11 The sectional view of the laser head and the flexible sealing assembly provided by the present application;

[0029] Figure 12 The schematic view of the three-dimensional structure of the first light direction adjusting device provided by the present application;

[0030] Figure 13 The front view of the first light direction adjusting device provided by the present application;

[0031] Figure 14 The exploded view of the first light direction adjusting device provided by the present application;

[0032] The identification explanation in the figure:

[0033] 1, laser head; 2, oven; 3, flexible sealing assembly; 31, flexible sealing member; 311, inflation cavity; 32, outer sleeve; 33, inner sleeve; 331, first groove; 34, control valve; 35, supporting plate; 4, adjusting assembly; 41, focal length adjusting device; 411, movement platform; 412, servo motor; 42, first light direction adjusting 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 adjusting device; 5, material belt; 6, passing roller. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

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

[0036] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0037] It is further to be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of' encompasses any and all possible combinations of one or more of the associated listed items.

[0038] Referring to Figure 1 and Figure 2 , the embodiment of the present application provides a laser drying device for heating a material belt 5, which comprises a laser head 1, an oven 2, a flexible sealing assembly 3 and an adjusting assembly 4, the oven 2 is used for placing the material belt 5, one side of the oven 2 is provided with a mounting port, the laser head 1 is arranged at the mounting port, the adjusting assembly 4 is connected to the laser head 1 and used for adjusting the light direction and focal length of the laser head 1; wherein, referring to Figure 3 and Figure 4 , the flexible sealing assembly 3 comprises an expandable or contractible flexible sealing member 31, the flexible sealing member 31 is arranged between the laser head 1 and the mounting port, the flexible sealing member 31 is contracted to form a gap between the laser head 1 and the mounting port before the adjusting assembly 4 is adjusted, and the flexible sealing member 31 is expanded to seal between the laser head 1 and the mounting port after the adjusting assembly 4 is adjusted.

[0039] In the embodiment, the adjusting assembly 4 is arranged to adjust the light direction and focal length of the laser head 1, and the flexible sealing assembly 3 is arranged to control the mounting sealing between the laser head 1 and the oven 2. The flexible sealing member 31 is contracted to form a gap between the laser head 1 and the mounting port before the adjusting assembly 4 adjusts the laser head 1, so that the laser head 1 is controlled to move or rotate, and the laser head 1 irradiates the material belt 5 in the oven 2 uniformly; the flexible sealing member 31 is expanded to seal between the laser head 1 and the mounting port after the adjusting assembly 4 adjusts the laser head 1, so that the volatile material in the oven 2 cannot be discharged, effectively ensuring the cleanliness and safety of the production environment; through the linkage of the adjusting assembly 4 and the flexible sealing assembly 3, the problem that the adjustability and the sealing of the laser head 1 in the laser drying device are difficult to be compatible is solved, the uniformity of laser irradiation is ensured, and the sealing of the overall structure of the laser drying device is also ensured, which provides an important guarantee for the application of laser drying technology.

[0040] It should be noted that the oven 2 is provided with at least two over rollers 6 for supporting and transporting the material belt 5, and the two over rollers 6 support to form a stable plane. When the laser head 1 is instructed to emit light, the laser head 1 irradiates the material belt 5 with a light spot. The shape of the light spot irradiated on the material belt 5 is observed, and the direction of the light emitted by the laser head 1 is controlled through the adjusting assembly 4 until the shape of the light spot irradiated on the material belt 5 reaches an ideal state, and then the leveling action is completed. Then, the laser head 1 is moved closer to or away from the material belt 5 through the adjusting assembly 4, and the quality of the light spot irradiated on the material belt 5 is observed until the quality of the light spot irradiated on the material belt 5 reaches the best, and then the focusing action is completed. At this time, the adjusting action of the adjusting assembly 4 on the laser head 1 is completed.

[0041] Specifically, as shown in Figures 4 to 10 The flexible sealing assembly 3 further includes an outer sleeve 32 and an inner sleeve 33. The outer sleeve 32 is installed on the inner side of the mounting port, and 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. 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 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 freely move or rotate in the gap formed between the outer sleeve 32 and the inner sleeve 33 without any obstruction. Once the position and angle of the laser head 1 are adjusted, the flexible sealing member 31 is inflated to tightly seal the gap between the inner sleeve 33 and the outer sleeve 32, so as to ensure that the materials in the oven 2 will not leak to the external environment, thereby maintaining the cleanliness and safety of the production environment. It should be explained that the gap between the outer sleeve 32 and the inner sleeve 33 in the embodiment is the gap between the laser head 1 and the mounting port.

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

[0043] Specifically, the circumferential length of the flexible sealing member 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 sealing member 31 is made of elastic material with certain stretchability, which can be directly stretched by tools and then sleeved into the first groove 331 of the inner sleeve 33 in the present embodiment. Since the circumferential length of the flexible sealing member 31 in the contracted state is less than the circumferential length of the first groove 331, the flexible sealing member 31 can be tightly enclosed in the first groove 331 in the contracted state.

[0044] Further, in order to prevent the flexible sealing member 31 from falling off during the adjustment of the laser head 1, in another possible embodiment, as shown in Figure 11 the inner sleeve 33 and / or the outer sleeve 32 is provided with a supporting plate 35 along the circumference, and the flexible sealing member 31 is located above the supporting plate 35. Preferably, the flexible sealing member 31 is adhesively connected with the supporting plate 35. In this embodiment, by providing the supporting plate 35, an additional supporting surface is provided for the flexible sealing member 31, effectively preventing the risk of falling off or displacement of the flexible sealing member 31 due to external force during adjustment, thereby improving the stability of the flexible sealing member 31.

[0045] Specifically, as shown in Figures 7 to 10 the flexible sealing member 31 is a sealing ring, and the sealing ring is provided with an inflation cavity 311. Preferably, the sealing ring is made of rubber material and can be elastically deformed when subjected to external force, thereby tightly fitting the sealing surface. By providing the inflation cavity 311 inside the sealing ring, the tightness of the sealing ring can be adjusted by inflation or deflation. When inflated, the sealing ring will expand and tightly fit 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] Further, the flexible sealing assembly 3 further comprises a control valve 34 which is communicated with the inflation cavity 311 and is used to control inflation or deflation of the inflation cavity 311. It can be understood that the control valve 34 is a device capable of controlling the flow of fluid. In the flexible sealing assembly 3, the control valve 34 is designed to be communicated with the inflation cavity 311, and by opening or closing the valve, the gas is allowed to enter or leave the inflation cavity 311. When inflation is needed, the control valve 34 is opened to allow gas to enter the inflation cavity 311 through the pipeline, so that the sealing ring expands and tightly fits the sealing surface; when deflation is needed, the control valve 34 closes the gas inlet channel and opens the gas outlet channel, so that the gas in the inflation cavity 311 is discharged through the pipeline, thereby returning 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 communicated with the inflation cavity 311, the second port is communicated with the external air, and the third port is communicated with the air source. In the embodiment, the electromagnetic reversing valve is a device for controlling the movement of the valve core by electromagnetic force, so as to change the fluid flow direction. When the electromagnet is powered on, the electromagnetic force generated by the electromagnet attracts the valve core to move, so as to make the first port communicated with the third port (or the second port), thereby realizing the inflation (or deflation) function. When the electromagnet is powered off, the spring force makes the valve core reset, so as to close the current communicated port, and possibly make the first port communicated with another port (or keep closed), thereby realizing the deflation (or keep inflation) function. Optionally, the laser drying device of the embodiment further includes a control system, which is electrically connected to the control valve 34. When the control system is controlled by the worker, the control system will keep or change the conduction state of the control valve 34, so as to realize the inflation state or the deflation state of the flexible sealing assembly 3.

[0048] Further, as shown in Figure 5 and Figure 6 , the adjusting assembly 4 includes a focal length adjusting device 41 for driving the laser head 1 to translate relative to the material belt 5. Specifically, the focal length adjusting device 41 is used to drive the laser head 1 to translate in the direction of approaching or moving away from the material belt 5. Optionally, the focal length adjusting device 41 includes a lead screw motion module, and the laser head 1 is connected to a motion platform 411 of the lead screw motion module. In operation, the control system sends a motion instruction to a servo motor 412 connected to the lead screw motion module, the servo motor 412 rotates to drive the motion platform 411 of the lead screw motion module to move up and down, thereby driving the laser head 1 to move up and down. Optionally, the servo motor 412 has an encoder, which can record and feedback the distance of the motion of the motion platform 411 in real time, and stop when the motion platform 411 moves a specified distance. Among them, the lead screw motion module is a standard product in the industry, and after selecting a suitable servo motor 412, connecting the laser head 1 with the motion platform 411, the driving of the laser head 1 to move up and down in a straight line can be realized. In other embodiments, the lead screw motion module can be replaced by a synchronous belt module or a gear and rack module, or a manual adjustment mode without power can be used instead, which will not be described here.

[0049] Further, the adjusting assembly 4 includes a first light direction adjusting device 42 and a second light direction adjusting device 43, the first light direction adjusting device 42 is used to drive the laser head 1 to rotate in a first plane, and the second light direction adjusting device 43 is used to drive the laser head 1 to rotate in a second plane, and the second plane is perpendicular to the first plane. After installing the laser head 1, the light direction adjusting devices of the two planes can be adjusted in sequence until the light spot of the laser is parallel to the material belt 5 below.

[0050] Optionally, as shown in Figure 12 , Figure 13and Figure 14 As shown in the figure, the first light direction adjusting device 42 is connected to the moving platform 411 of the focal length adjusting device 41, which includes a rotating base plate 421 and a rotating plate 422 connected to the rotating base plate 421, the rotating plate 422 is provided with a pointer 423, and the rotating base plate 421 is provided with an indicating scale, the angle of rotation of the rotating plate 422 relative to the rotating base plate 421 can be known through the cooperation of 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, which is one of the bearings, which can provide support and rotation for objects on both sides of the inner and outer rings. At the same time, a mandrel 425 is also provided between the rotating plate 422 and the rotating base plate 421, which 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. Further, the first light direction adjusting device 42 also 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 is locked with the rotating base plate 421 through a thread, and 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, preventing loosening and completing the single direction rotation adjustment function. 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 described here. It should be pointed out 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, 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 pointed out here that there are many ways to adjust the rotation, such as using hollow rotating platform, gear and rack, worm and gear, etc., which cannot be listed one by one here, but the way of adjusting the parallel laser head 1 should be regarded as the scope of the present application.

[0051] In the present 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 in 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, which realize the smooth rotation of the rotating plate 422 through a cross roller bearing 424 and a mandrel 425, the combination of the pointer 423 provided on the rotating plate 422 and the indicating scale on the rotating base plate 421 provides visual feedback of the rotation angle, ensuring the accuracy of the adjustment, and the cooperation of the locking column 426 and the handle 427 can lock the rotating plate 422 and the rotating base plate 421 after the adjustment is completed, preventing loosening and ensuring the durability of the adjustment result.

[0052] The various embodiments described in the specification are presented for purposes of illustration and description. Each of the embodiments highlight a different aspect of the application. The embodiments are not mutually exclusive, and aspects of each embodiment can be combined with aspects of other embodiments. The embodiments disclosed herein are not exhaustive of the ways in which the application can be practiced. The present disclosure is therefore not to be construed as being limited to the embodiments disclosed in this specification. Numerous alternative embodiments not explicitly described herein will be apparent to those skilled in the art in view of this disclosure. Variations to the embodiments disclosed herein can be made and will be obvious to those skilled in the art, and it is intended that the application cover such modifications and variations. Each document, patent, patent application, or any other citation mentioned in this specification is incorporated by reference, but only to the extent that the incorporated material does not conflict with the present disclosure. The summary of the application does not intend to limit the scope of the application, but to present some of the concepts disclosed herein in a simplified form. The detailed description of the application is presented with specific embodiments to describe the application in more detail.

[0053] It should also be noted that the terms "first", "second", and the like, do not denote any order, quantity, combination, or importance, but rather are used to distinguish one element from another, and do not imply or require any actual relationship or sequence among the elements. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0054] The indefinite articles "a" and "an" are intended to mean "there is at least one"; the indefinite article "the" is not intended to mean "there is only one" but that just one of the possible candidates is intended. The words "comprising" (including the variation "comprises"), "including" (including the variation "includes"), "containing" (including the variation "contains") or "having" (including the variation "has") are inclusive or open-ended and do not exclude additional, unrecited elements or method steps. The words "a set" or "sets" are intended to mean "one or more than one", "at least one", or "one or more".

Claims

1. A laser drying apparatus for heating a web, characterized by, The laser head, the oven, the flexible sealing assembly and the adjusting assembly, the oven is used for placing the material belt, one side of the oven is provided with a mounting port, the laser head is arranged at the mounting port, the adjusting assembly is connected to the laser head, and the direction and focal length of the laser head are adjusted. The flexible sealing assembly includes an inflatable and contractible flexible sealing member, the flexible sealing member is arranged between the laser head and the mounting port, the flexible sealing member is contracted to form a gap between the laser head and the mounting port before the adjusting assembly is adjusted, and the flexible sealing member is inflated to seal the laser head and the mounting port after the adjusting assembly is adjusted. The flexible sealing assembly further includes an outer sleeve and an inner sleeve, the outer sleeve is mounted on the inner side of the mounting port, the inner sleeve is arranged on the outer side of the laser head and inside the outer sleeve, and the flexible sealing member is arranged between the outer sleeve and the inner sleeve. The flexible sealing member is a sealing ring, and the sealing ring is provided with an inflation cavity. The outer side of the inner sleeve is provided with a first groove in the circumferential direction, one side of the flexible sealing member is embedded in the first groove, and / or the inner side of the outer sleeve is provided with a second groove in the circumferential direction, the other side of the flexible sealing member is embedded in the second groove.

2. The laser drying apparatus according to claim 1, wherein The inner sleeve and / or the outer sleeve are provided with a supporting plate in the circumferential direction, and the flexible sealing member is located above the supporting plate.

3. The laser drying apparatus of claim 1, wherein, The circumferential length of the flexible sealing member in the contracted state is less than the circumferential length of the first groove.

4. The laser drying apparatus of claim 2, wherein The flexible sealing assembly further includes a control valve, the control valve is communicated with the inflation cavity, and the inflation cavity is inflated or deflated.

5. The laser drying apparatus of claim 1, wherein, The control valve is an electromagnetic reversing valve, the electromagnetic reversing valve includes a first port, a second port and a third port, the first port is communicated with the inflation cavity, the second port is communicated with external air, and the third port is communicated with a gas source.

6. The laser drying apparatus of claim 5, wherein, The adjusting assembly includes a focal length adjusting device, the focal length adjusting device is used for driving the laser head to translate relative to the material belt.

7. The laser drying apparatus of claim 1, wherein The adjusting assembly includes a first light direction adjusting device and a second light direction adjusting device, the first light direction adjusting device is used for driving the laser head to rotate in a first plane, the second light direction adjusting device is used for driving the laser head to rotate in a second plane, and the second plane is perpendicular to the first plane.

8. The laser drying apparatus of claim 1, wherein, ​

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