A rack structure of a steel strip casting and drying box

Abstract

The present application relates to the technical field of film preparation, and discloses a rack structure of a steel strip casting drying box, which comprises, from bottom to top, a bottom heat preservation layer, a middle lower heat preservation layer, a middle upper heat preservation layer and a top heat preservation layer arranged in sequence and parallel to each other; the middle lower heat preservation layer and the middle upper heat preservation layer are connected through a plurality of middle layer support columns; the side surface of part of the middle layer support columns is fixed with a beam inserting lug for cooperation with a longitudinal beam; a plurality of lifting lugs are arranged on the top surface of the top heat preservation layer; the rack structure is ingeniously provided with the lifting lugs and the beam inserting lugs, can quickly and in advance maintain the positions of the middle lower heat preservation layer, the middle upper heat preservation layer and the top heat preservation layer before the steel strip is disassembled, and even if the lower support columns and the upper support columns are removed to remove the obstruction to the steel strip, the positions of the middle lower heat preservation layer, the middle upper heat preservation layer and the top heat preservation layer will not change, on the one hand, the steel strip can be quickly disassembled and assembled, and the work efficiency is improved, and on the other hand, the rack is small in disassembly and assembly change, and is convenient for recovery in the later period.

Description

Technical Field

[0001] This invention relates to the field of thin film preparation technology, and in particular to a frame structure for a steel strip casting drying oven. Background Technology

[0002] Polyimide (PI) film is widely used in the electronics and electrical fields as a high-performance insulating material due to its excellent electrical properties, flame retardancy, high temperature resistance, and radiation resistance. Polyimide film is generally prepared by solvent casting, specifically by extruding polyimide slurry onto a steel strip casting machine. The steel strip casting machine includes a drying chamber, an active drum structure connected to one end of the drying chamber, a driven drum structure connected to the other end of the drying chamber, and a steel strip wound on the active and driven drum structures. The steel strip runs in a waist-shaped path, and both the upper and lower straight sections of the steel strip pass through the drying chamber. That is, the polyimide slurry on the steel strip also dries and is cast in a waist-shaped path. Then, the polyimide slurry is conveyed to a tenter frame for transverse stretching through a peeling transition mechanism. Finally, an imidization reaction is carried out using a heat source to finally produce a polyimide film.

[0003] The steel strip on the steel strip casting machine requires regular disassembly and maintenance, such as cleaning and inspecting for damage, to ensure timely repair or replacement and guarantee the production quality of the polyimide film. However, the upper and lower straight sections of the steel strip are built into the drying chamber. The frame and external insulation structure of the drying chamber hinder the disassembly of the steel strip from the front or rear of the chamber. Furthermore, the drying chamber includes air ducts mounted on the frame. If the air ducts need to be disassembled to facilitate steel strip removal, they must be reassembled and repositioned later, which is cumbersome and time-consuming. Therefore, it is necessary to design the drying chamber frame to facilitate steel strip disassembly and assembly. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a frame structure for a steel strip casting drying oven, which is designed to facilitate the disassembly and assembly of the steel strip in the later stages.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A frame structure for a steel strip casting drying oven includes a bottom insulation layer, a middle-lower insulation layer, a middle-upper insulation layer, and a top insulation layer arranged sequentially and parallel to each other from bottom to top. The middle-lower insulation layer and the middle-upper insulation layer are connected by multiple middle-layer support columns, and some of the middle-layer support columns have insert beam lifting lugs fixed to their sides for cooperation with longitudinal beams. A lower insulation pad is fixed to the top surface of both ends of the bottom insulation layer, and each lower insulation pad is connected to the middle-lower insulation layer by a lower support column. An upper insulation pad is provided at the bottom surface of both ends of the top insulation layer, and each upper insulation pad is connected to the middle-upper insulation layer by an upper support column. Multiple lifting rings are provided on the top surface of the top insulation layer. An upper drying tunnel for steel strips is formed between the top insulation layer and the middle-upper insulation layer, and a lower drying tunnel for steel strips is formed between the bottom insulation layer and the middle-lower insulation layer.

[0006] As a further improvement to the above technical solution, the insert beam lifting lug includes a reference mounting plate and a square-shaped insert plate, with one side of the insert plate welded to the reference mounting plate.

[0007] As a further improvement to the above technical solution, the beam lifting lugs are provided with four, two of which can be inserted into the same longitudinal beam, forming a left lifting lug assembly, and the remaining two beam lifting lugs can be inserted into the same longitudinal beam, forming a right lifting lug assembly. The left and right lifting lug assemblies are arranged symmetrically from left to right.

[0008] As a further improvement to the above technical solution, a sealing plate hanger is provided on the bottom surface of the top insulation layer, and a flat upper guide sealing plate is provided on the sealing plate hanger.

[0009] As a further improvement to the above technical solution, the sealing plate hanger is connected to the middle and upper insulation layer by screws through the first inner support column.

[0010] As a further improvement to the above technical solution, a sealing plate bracket is provided on the upper surface of the bottom insulation layer, and a flat lower guide sealing plate is provided on the sealing plate bracket.

[0011] As a further improvement to the above technical solution, the sealing plate bracket is connected to the middle and lower insulation layer by screws through the second inner support column.

[0012] As a further improvement to the above technical solution, a static pressure box insulation layer is provided on the middle and lower insulation layer.

[0013] As a further improvement to the above technical solution, casters are provided on the bottom surface of the middle and lower insulation layer.

[0014] As a further improvement to the above technical solution, one end of the lower middle insulation layer and the upper middle insulation layer are connected by a first mounting plate, and the other end is connected by a second mounting plate. The sides of the bottom insulation layer, the lower middle insulation layer, the upper middle insulation layer and the top insulation layer are provided with multiple mounting holes for installing the outer insulation structure.

[0015] The beneficial effects of this invention are as follows: Compared with the prior art, the frame structure of the steel strip casting drying box provided by this invention fully considers the disassembly and assembly requirements of the steel strip in the later stage, and meets the disassembly and assembly of the steel strip with minimal disassembly and assembly work. The frame is cleverly equipped with lifting rings and insert beam lifting lugs, which can quickly and pre-maintain the positions of the lower middle insulation layer, the upper middle insulation layer and the top insulation layer before disassembling the steel strip. Even if the lower support column and the upper support column are removed to remove the obstruction to the steel strip, the positions of the lower middle insulation layer, the upper middle insulation layer and the top insulation layer will not change. On the one hand, it ensures that the steel strip can be quickly disassembled and assembled, improving work efficiency. On the other hand, the disassembly and assembly of the frame requires little modification, which is convenient for later restoration. Attached Figure Description

[0016] Figure 1 The three-dimensional frame structure of the steel strip casting drying oven provided by the present invention Figure 1 .

[0017] Figure 2 The three-dimensional frame structure of the steel strip casting drying oven provided by the present invention Figure 2 .

[0018] Figure 3 This is a front view of the frame structure of the steel strip casting drying oven provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the movement path of the steel strip in the frame structure of the steel strip casting and drying oven. The arrows in the diagram indicate the transmission direction of the steel strip.

[0020] Explanation of main component symbols: 11-Bottom insulation layer, 12-Middle and lower insulation layer, 13-Middle and upper insulation layer, 14-Top insulation layer, 15-Mounting hole, 2-Middle layer support column, 3-Insertion beam lifting lug, 31-Base mounting plate, 32-Insertion plate, 41-Lower insulation pad, 42-Lower support column, 43-Upper insulation pad, 44-Upper support column, 51-Lifting ring, 52-Cast wheel, 61-Upper drying tunnel, 62-Lower drying tunnel, 63-Steel strip, 71-Sealing plate hanger, 72-Upper guide sealing plate, 73-First inner layer support column, 74-Sealing plate bracket, 75-Lower guide sealing plate, 76-Second inner layer support column, 8-Static pressure box insulation layer, 91-First mounting vertical plate, 92-Second mounting vertical plate, 93-Upper heating air duct assembly, 94-Lower heating air duct assembly. Detailed Implementation

[0021] This invention provides a frame structure for a steel strip casting drying oven. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0022] Please see Figure 1-4 This invention provides a frame structure for a steel strip casting drying oven, comprising a bottom insulation layer 11, a middle-lower insulation layer 12, a middle-upper insulation layer 13, and a top insulation layer 14 arranged sequentially and parallel to each other from bottom to top; the middle-lower insulation layer 12 and the middle-upper insulation layer 13 are connected by multiple middle-layer support columns 2, and some of the middle-layer support columns 2 have insert beam lifting lugs 3 fixed on their sides for cooperating with longitudinal beams; both ends of the bottom insulation layer 11 are fixed with lower insulation pads 41, and each lower insulation pad 41 is connected to the middle-lower insulation layer 12 by a lower support column 42; both ends of the top insulation layer 14 are provided with upper insulation pads 43, and each upper insulation pad 43 is connected to the middle-upper insulation layer 13 by an upper support column 44; multiple lifting rings 51 are provided on the top surface of the top insulation layer 14.

[0023] Under normal operating conditions, the bottom insulation layer 11, the middle and lower insulation layer 12, the middle and upper insulation layer 13, and the top insulation layer 14 are installed in a stacked manner. An upper drying tunnel 61 is formed between the top insulation layer 14 and the middle and upper insulation layer 13 for the steel strip 63 to pass through. A lower drying tunnel 62 is formed between the bottom insulation layer 11 and the middle and lower insulation layer 12 for the steel strip 63 to pass through. A hollow isolation layer is formed between the middle and lower insulation layer 12 and the middle and upper insulation layer 13. The upper straight section of the steel strip 63 of the steel strip casting machine passes through the upper drying tunnel 61 and the lower straight section of the steel strip 63 passes through the lower drying tunnel 62. The steel strip 63 is transported in a waist-shaped path by the traction of the active drum and the passive drum. The upper drying tunnel 61 and the lower drying tunnel 62 are sealed with outer insulation structures to ensure that the heat in the upper drying tunnel 61 and the lower drying tunnel 62 is not transferred to the outside. In fact, the bottom of the top insulation layer 14 is provided with an upper heating air duct assembly 93, and the top of the bottom insulation layer 11 is provided with a lower heating air duct assembly 94. The upper heating air duct assembly 93 and the lower heating air duct assembly 94 are used to transport hot air to dry and cure the polyimide slurry on the steel strip 63.

[0024] When the steel belt 63 needs to be disassembled and maintained after long-term use, the outer insulation structure on one side of the drying box should be disassembled first to open the interior of the drying box. Then, the top insulation layer 14 should be maintained by using the hook of the overhead crane and the lifting ring 51 or the hook of the electric hoist on the roof and the lifting ring 51. Next, the longitudinal beam should be inserted into the beam lug 3. The longitudinal beam supports the middle and lower insulation layers 12 and the middle and upper insulation layers 13 to maintain their positions. The bottom insulation layer 11 is directly supported by the ground to maintain its position. Then, the frame only needs to be disassembled by removing the lower support column 42 and the upper support column 44 on the side of the steel belt 63 to solve the obstruction of the lower support column 42 and the upper support column 44 from the steel belt 63, so as to ensure that the steel belt 63 can be efficiently moved longitudinally to achieve disassembly. Understandably, although some of the lower support column 42 and upper support column 44 were disassembled, the positions of the bottom insulation layer 11, the middle and lower insulation layer 12, the middle and upper insulation layer 13, and the top insulation layer 14 were maintained without displacement. Therefore, it will not affect the installation of the upper heating duct assembly and the lower heating duct assembly. That is, the disassembly and assembly of the steel strip 63 do not require any modification or disassembly of the upper heating duct assembly and the lower heating duct assembly, ensuring that the normal use of the upper heating duct assembly 93 and the lower heating duct assembly 94 will not be affected. There is no need to spend time on debugging the upper heating duct assembly 93 and the lower heating duct assembly 94 later.

[0025] Compared with the prior art, the frame structure of the steel strip casting drying box provided by the present invention fully considers the disassembly and assembly requirements of the steel strip 63 in the later stage, and meets the disassembly and assembly of the steel strip 63 with minimal frame disassembly and assembly work. The frame is cleverly equipped with lifting rings 51 and insert beam lifting lugs 3, which can quickly and pre-maintain the positions of the lower insulation layer 12, the upper insulation layer 13 and the top insulation layer 14 before disassembling the steel strip 63. Even if the lower support column 42 and the upper support column 44 are removed to remove the obstruction to the steel strip 63, the positions of the lower insulation layer 12, the upper insulation layer 13 and the top insulation layer 14 will not change. On the one hand, it ensures that the steel strip 63 can be quickly disassembled and assembled, improving work efficiency. On the other hand, the disassembly and assembly of the frame requires little modification, which is convenient for later restoration.

[0026] Specifically, the insert beam lifting lug 3 includes a reference mounting plate 31 and a square-shaped insert plate 32. One side of the insert plate 32 is welded to the reference mounting plate 31 to ensure the overall structural strength and stability. The square-shaped insert plate 32 design allows the insert beam lifting lug 3 to quickly engage with the square-tube longitudinal beam, ensuring that the longitudinal beam can bear the weight of the entire lower and middle insulation layers 12 and the upper and middle insulation layers 13, providing convenient operation during disassembly and maintenance.

[0027] Furthermore, the beam lifting lugs 3 are provided in four configurations. Two beam lifting lugs 3 can be inserted into the same longitudinal beam, forming a left lifting lug assembly. The remaining two beam lifting lugs 3 can be inserted into the same longitudinal beam, forming a right lifting lug assembly. The left and right lifting lug assemblies are arranged symmetrically. This symmetrical arrangement ensures that at least two longitudinal beams jointly bear the weight of the lower insulation layer 12 and the upper insulation layer 13, resulting in a reasonable weight distribution. This not only prevents the longitudinal beams from breaking due to excessive load but also improves the balance and stability of the lower insulation layer 12 and the upper insulation layer 13 after they are erected.

[0028] Because the upper heating air duct assemblies in the upper drying tunnel 61 are spaced apart, concave cavities are formed between adjacent upper heating air duct assemblies. These concave cavities cause turbulence in the hot air within the upper drying tunnel 61, affecting the drying and curing effect of the hot air on the polyimide slurry. Therefore, a sealing plate hanger 71 is provided on the bottom surface of the top insulation layer 14. The sealing plate hanger 71 is equipped with a horizontally placed upper guide sealing plate 72, which covers the space of the concave cavity, allowing the hot air in the upper drying tunnel 61 to stably and centrally heat the polyimide slurry on the steel strip 63.

[0029] Furthermore, the sealing plate hanger 71 is connected to the upper and middle insulation layer 13 by screws via the first inner support column 73. This arrangement allows the first inner support column 73 to support the sealing plate hanger 71, thus strengthening the support of the upper and middle insulation layer 13 for the interior of the top insulation layer 14, reducing the risk of deformation or collapse of the top insulation layer 14 due to lack of support. It is understood that the first inner support column 73 needs to be removed before disassembling the steel strip 63 to remove its obstruction to the movement of the steel strip 63.

[0030] It should be understood that the upper drying duct 61 has multiple sealing plate hangers 71 and upper guide sealing plates 72 that cooperate with the sealing plate hangers 71. The size of each sealing plate hanger 71 and upper guide sealing plate 72 is determined according to the size of the cavity between adjacent upper heating air duct assemblies.

[0031] Because the lower heating air duct assemblies in the lower drying tunnel 62 are spaced apart, cavities are formed between adjacent lower heating air duct assemblies. These cavities cause turbulence in the hot air within the lower drying tunnel 62, affecting the drying and curing effect of the hot air on the polyimide slurry. Therefore, a sealing plate bracket 74 is provided on the upper surface of the bottom insulation layer 11. A horizontally placed lower guide sealing plate 75 is provided on the sealing plate bracket 74. The lower guide sealing plate 75 covers the space of the cavity, allowing the hot air in the lower drying tunnel 62 to stably and centrally heat the polyimide slurry on the steel strip 63.

[0032] Preferably, the sealing plate bracket 74 is connected to the lower insulation layer 12 by screws via a second inner support column 76. This arrangement strengthens the support of the bottom insulation layer 11 for the upper insulation layer 13, reducing the risk of deformation or collapse of the upper insulation layer 13 due to lack of internal support. It is understood that the second inner support column 76 needs to be removed before disassembling the steel strip 63 to remove its obstruction to the movement of the steel strip 63.

[0033] Preferably, the middle and lower insulation layer 12 is provided with a static pressure box insulation layer 8. The static pressure box insulation layer 8 can reduce the heat loss of the hot air in the static pressure box and better transfer the hot air through the static pressure box to the upper heating air duct assembly and the lower heating air duct assembly.

[0034] Preferably, the bottom surface of the lower insulation layer 12 is provided with casters 52, which makes the drying box movable and easy to move and adjust its position according to the actual location, so that the drying box can be better connected with upstream and downstream equipment.

[0035] Preferably, one end of the lower middle insulation layer 12 and the upper middle insulation layer 13 is connected by a first mounting vertical plate 91, and the other end is connected by a second mounting vertical plate 92. The first mounting vertical plate 91 is connected to the active drum mechanism, and the second mounting vertical plate 92 is connected to the passive drum mechanism.

[0036] Furthermore, the sides of the bottom insulation layer 11, the middle and lower insulation layer 12, the middle and upper insulation layer 13, and the top insulation layer 14 are provided with a plurality of mounting holes 15 for installing the outer insulation structure. The mounting holes 15 can be threaded holes and can be used with long screws to fix the outer insulation structure to the sides of the bottom insulation layer 11, the middle and lower insulation layer 12, the middle and upper insulation layer 13, and the top insulation layer 14.

[0037] In fact, the lower support column 42, the upper support column 44, the first inner layer support column 73, and the second inner layer support column 76 are all located on the two horizontal sides of the insulation layer to avoid obstructing the normal movement and transmission of the steel belt.

[0038] In the description of this invention, 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," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; 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 invention according to the specific circumstances.

[0040] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A frame structure for a steel strip casting drying oven, characterized in that, The insulation system comprises a bottom insulation layer, a middle-lower insulation layer, a middle-upper insulation layer, and a top insulation layer, arranged sequentially and parallel to each other from bottom to top. The middle-lower and middle-upper insulation layers are connected by multiple middle-layer support columns, and some of the middle-layer support columns have insert beam lifting lugs fixed to their sides for cooperation with longitudinal beams. A lower insulation pad is fixed to the top surface of both ends of the bottom insulation layer, and each lower insulation pad is connected to the middle-lower insulation layer by a lower support column. An upper insulation pad is provided at the bottom surface of both ends of the top insulation layer, and each upper insulation pad is connected to the middle-upper insulation layer by an upper support column. Multiple lifting rings are provided on the top surface of the top insulation layer. An upper drying tunnel for steel strips is formed between the top insulation layer and the middle-upper insulation layer, and a lower drying tunnel for steel strips is formed between the bottom insulation layer and the middle-lower insulation layer.

2. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, The insert beam lifting lug includes a reference mounting plate and a square insert plate, with one side of the insert plate welded to the reference mounting plate.

3. The frame structure of the steel strip casting drying oven according to claim 1 or 2, characterized in that, The beam lifting lugs are provided in four parts. Two beam lifting lugs can be inserted into the same longitudinal beam, and these two beam lifting lugs form the left lifting lug assembly. The remaining two beam lifting lugs can be inserted into the same longitudinal beam, and these two beam lifting lugs form the right lifting lug assembly. The left and right lifting lug assemblies are arranged symmetrically from left to right.

4. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, The bottom surface of the top insulation layer is provided with a sealing plate hanger, and the sealing plate hanger is provided with a flat upper guide sealing plate.

5. The frame structure of the steel strip casting drying oven according to claim 4, characterized in that, The sealing plate hanger is connected to the middle and upper insulation layer by screws through the first inner support column.

6. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, The upper surface of the bottom insulation layer is provided with a sealing plate bracket, and the sealing plate bracket is provided with a flat lower guide sealing plate.

7. The frame structure of the steel strip casting drying oven according to claim 6, characterized in that, The sealing plate bracket is connected to the middle and lower insulation layer by screws through the second inner support column.

8. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, A static pressure box insulation layer is provided on the middle and lower insulation layer.

9. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, The bottom surface of the middle and lower insulation layer is equipped with casters.

10. The frame structure of the steel strip casting drying oven according to claim 1, characterized in that, One end of the lower middle insulation layer and the upper middle insulation layer are connected by a first mounting plate, and the other end is connected by a second mounting plate. The sides of the bottom insulation layer, the lower middle insulation layer, the upper middle insulation layer and the top insulation layer are provided with multiple mounting holes for installing the outer insulation structure.

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