Edge pressing device for heating large-area sheet by flat plate furnace

Abstract

An edge pressing device for a flat plate furnace to heat large-area sheets comprises a square frame and a center disc, the center disc is arranged in the center of the square frame, the four corners of the square frame are connected with one ends of diagonal rods respectively, the other ends of the diagonal rods are connected with the center disc, and strip-shaped sliding grooves are formed in the surfaces of the diagonal rods respectively. The lower portion of the strip-shaped sliding groove is slidably connected with a first telescopic pressing assembly. A first pressing block is installed on the lower end face of the first telescopic pressing assembly. The first pressing block is used for pressing the edge of the rigid thin plate. The utility model overcomes the defects in the prior art, and can effectively ensure that the rigid thin plate can be flattened. And the heat conduction receiving efficiency of each point on the rigid thin plate is uniform. Therefore, the problem of bending deformation of the rigid thin plate caused by temperature difference is effectively prevented, and the fitting degree of the rigid thin plate and the heating plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment tools, in particular to an edge pressing device used for heating large-area thin slices in a flat furnace. Background Art

[0002] In the prior art, when a flat plate furnace is used to heat a large rigid sheet (such as glass), the two sides of the rigid sheet (close to the heating plate surface and away from the heating plate surface) are heated unevenly, which often leads to a significant temperature difference, thereby causing the sheet to bend and deform toward the side with lower temperature. Figure 1 The figure shows the deformation of a rigid sheet on a heating plate. Assume that the upper and lower surfaces of the sheet are approximately spherical when deformed by thermal expansion. The sheet's side length is x, the coefficient of thermal expansion is η, the lower surface is hotter than the upper surface by ΔT, and the sheet's thickness is z. Then, when the sheet is placed on the heating plate, the lower surface grows larger than the upper surface by: Δx = xη·ΔT. Because the circumference difference between the upper and lower surfaces is Δc = π·2z, we can calculate θ = π·Δx / Δc = xη·ΔT / 2z. The height of the sheet's warping angle can be calculated as:

[0003] d = 0.5x·(sin-1θ-tan-1θ) = 0.5x·[sin-1(xη·ΔT / 2z)-tan-1(xη·ΔT / 2z)]. For example, when the glass lengths are 2 cm, 10 cm, 30 cm, and 100 cm, and ΔT = 70°C, the glass warp angle heights are 0.009 mm, 0.22 mm, 1.96 mm, and 23.8 cm, respectively.

[0004] This deformation not only affects the fit between the sheet and the heating plate, especially in the edge area of the sheet, the farther away from the center the worse the fit is, which directly leads to reduced heating efficiency and uneven temperature distribution on the surface of the sheet, affecting product quality. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention provides an edge-pressing device for heating large-area thin sheets in a flat-plate furnace. This device overcomes these shortcomings and features a rational design that effectively ensures that rigid thin sheets can be flattened. This ensures uniform heat transfer efficiency at all points on the rigid sheet. This effectively prevents bending and deformation of the sheet caused by temperature differences, improving the fit between the sheet and the heating plate.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A device for pressing an edge of a flat furnace for heating large-area thin slices comprises a square frame and a center disk, wherein the center disk is arranged at the center of the square frame, the four corners of the square frame are respectively connected to one end of a diagonal rod, and the other ends of the diagonal rods are connected to the center disk, the surfaces of the diagonal rods are provided with strip sliding grooves, and a first telescopic pressing assembly is slidably connected below the strip sliding grooves; a first pressing block is installed on the lower end surface of the first telescopic pressing assembly; the first pressing block is used to press on the edge of a rigid thin plate.

[0008] Preferably, the first telescopic pressing assembly includes a first telescopic pressure rod, the upper end of the first telescopic pressure rod is fixedly mounted with one end of the first screw rod, the other end of the first screw rod passes through the strip sliding groove and is connected to the first locking nut, and the lower end of the first telescopic pressure rod is connected to the first pressing block through a telescopic shaft.

[0009] Preferably, the upper surfaces of the four sides of the square frame are provided with slide rails, each of the slide rails is slidably connected to at least one sliding block, and a limiting frame is fixedly connected above the sliding block;

[0010] An annular groove is provided on the side of the center disk, and a plurality of annular sliders are slidably connected in the annular groove. The number of the annular sliders is the same as the number of the sliding blocks. The outer side surface of each annular slider is respectively connected to one end of the adjusting long rod, and the other end of each adjusting long rod passes through the corresponding limiting frames; a strip slot hole is provided on the surface of each adjusting long rod, and a second telescopic clamping assembly is slidably connected below the strip slot hole, and a second clamping block is installed on the lower end surface of the second telescopic clamping assembly.

[0011] Preferably, the second telescopic pressing assembly includes a second telescopic pressure rod, the upper end of the second telescopic pressure rod is fixedly mounted with two ends of the second screw rod, the other two ends of the second screw rod pass through the strip slot and are connected to the second locking nut, and the lower end of the second telescopic pressure rod is connected to the second pressing block through a telescopic shaft.

[0012] Preferably, the first pressing block and the second pressing block are both made of high thermal resistance material.

[0013] Preferably, the first pressing block and the second pressing block are both L-shaped structures, used for pressing at the corner positions of the rigid thin plate.

[0014] The utility model provides an edge pressing device for heating large-area thin sheets in a flat furnace. It has the following beneficial effects: through the sliding connection of the first telescopic pressing assembly in the strip sliding groove, the axial position of the four first telescopic pressing assemblies relative to the four diagonal rods can be adjusted, so that the first pressing blocks below the four first telescopic pressing assemblies can just correspond to the four corners of the square rigid thin plate. The telescopic shaft of the first telescopic pressing assembly is controlled to drive the first pressing block to move downward to press on the edge position of the rigid thin plate, thereby effectively ensuring that the rigid thin plate is flattened. In addition, for rigid thin plates of different shapes, the rotation of the adjusting rod itself and the axial movement of the second telescopic pressing assembly along the adjusting rod can be used to ensure that each second telescopic pressing assembly can adjust its position at will within the corresponding fan-shaped horizontal plane range. By adjusting the corresponding number of second telescopic pressing assemblies to their corresponding positions within their corresponding ranges, and then using the telescopic shafts of the second telescopic pressing assemblies to drive the second pressing blocks downward, the corresponding number of second pressing blocks can be pressed against the edges of the rigid sheet, effectively ensuring that the rigid sheet is flattened. This ensures that the efficiency of heat conduction received by each point on the rigid sheet is uniform. This effectively prevents the problem of rigid sheet bending and deformation caused by temperature differences and improves the fit between the rigid sheet and the heating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for describing the prior art.

[0016] Figure 1 Schematic diagram of deformation of a rigid thin plate on a heating plate in the background art;

[0017] Figure 2 A schematic structural diagram of the utility model;

[0018] Figure 3 A schematic structural diagram of the first telescopic pressing assembly in the present utility model;

[0019] Figure 4 A schematic diagram of the structure of the central disc in the utility model cooperating with an adjusting long rod;

[0020] Description of the numbers in the figure:

[0021] 1. Square frame; 2. Center plate; 3. Diagonal rod; 4. Strip sliding groove; 5. First telescopic clamping assembly; 6. First clamping block; 7. Slide rail; 8. Sliding block; 9. Limiting frame; 10. Annular slide groove; 11. Annular slider; 12. Adjusting long rod; 13. Strip slot; 14. Second telescopic clamping assembly; 15. Second clamping block; 51. First telescopic pressure rod; 52. First screw; 53. First locking nut; 141. Second telescopic pressure rod; 142. Second screw; 143. Second locking nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0023] Example 1, as Figure 2-3 As shown, an edge pressing device for heating large-area thin slices in a flat furnace includes a square frame 1 and a center disk 2. The center disk 2 is arranged at the center position of the square frame 1. The four corner positions of the square frame 1 are respectively connected to one end of the diagonal rod 3, and the other ends of the diagonal rod 3 are connected to the center disk 2. The surface of the diagonal rod 3 is provided with a strip sliding groove 4, and a first telescopic pressing component 5 is slidably connected below the strip sliding groove 4; a first pressing block 6 is installed on the lower end surface of the first telescopic pressing component 5; the first pressing block 6 is used to press on the edge of the rigid thin plate.

[0024] Working principle:

[0025] During use, the entire square frame 1 is first fixed and hoisted directly above the heating plate. Then, according to the size of the square rigid sheet to be heated, the first telescopic pressing assembly 5 is slidably connected in the strip sliding groove 4, so that the axial position of the four first telescopic pressing assemblies 5 relative to the four diagonal rods 3 can be adjusted so that the first pressing blocks 6 below the four first telescopic pressing assemblies 5 can just correspond to the four corners of the square rigid sheet. After that, the heated square rigid sheet is placed in the corresponding position on the heating plate, and the telescopic axis of the first telescopic pressing assembly 5 is controlled to drive the first pressing blocks 6 to move downward to press against the edge of the rigid sheet, thereby effectively ensuring that the rigid sheet is flattened, so that the efficiency of heat conduction received by each point on the rigid sheet is uniform. This effectively prevents the bending and deformation of the rigid sheet caused by temperature difference and improves the fit between the rigid sheet and the heating plate.

[0026] Example 2, as a further preferred solution of Example 1, the first telescopic pressing assembly 5 includes a first telescopic pressure rod 51, the upper end of the first telescopic pressure rod 51 is fixedly installed with one end of the first screw 52, the other end of the first screw 52 passes through the strip sliding groove 4 and is connected to the first locking nut 53, and the lower end of the first telescopic pressure rod 51 is connected to the first clamping block 6 through a telescopic shaft.

[0027] Therefore, when the position of the first telescopic pressing assembly 5 on the diagonal rod 3 needs to be adjusted, the first locking nut 53 can be loosened first to allow the first screw rod 52 to slide axially along the strip-shaped sliding groove 4. After sliding to the appropriate position, the locking nut 53 can be tightened again to fix the position of the first telescopic pressing rod 51. The first pressing block 6 can then be driven downward by the telescopic shaft of the first telescopic pressing rod 51 to press against the edge of the rigid sheet.

[0028] Embodiment 3, as a further preferred embodiment of embodiment 1, the first pressing block 6 is made of a high thermal resistance material. Specifically, the high thermal resistance material can be directly an inorganic or organic high thermal resistance and high strength material such as wood board, polystyrene, polytetrafluoroethylene, red brick, alumina aerogel, refractory brick, etc., or it can be a composite structure formed by a metal outer layer wrapped with cotton cloth, rubber, Teflon, etc. with high thermal resistance. In this embodiment, it is preferably made of a composite structure formed by a metal outer layer wrapped with rubber. This ensures that the heating plate can effectively reduce the heat conduction effect between the first pressing block 6 and the rigid thin plate during the heating process, while maintaining sufficient mechanical strength to compress the edge of the thin sheet.

[0029] Embodiment 4, as a further preferred solution of embodiment 1, the first pressing blocks 6 are all L-shaped structures, used for pressing at the corner positions of the rigid thin plates.

[0030] Example 5, as Figure 2 and Figure 4 As shown, as a further preferred embodiment of the first embodiment, the upper surfaces of the four sides of the square frame 1 are provided with slide rails 7, each of the slide rails 7 is slidably connected to at least one sliding block 8, and a limiting frame 9 is fixedly connected above the sliding block 8;

[0031] An annular slide groove 10 is provided on the side of the center disk 2, and a plurality of annular sliders 11 are slidably connected in the annular slide groove 10. The number of annular sliders 11 is the same as the number of sliding blocks 8. The outer side surface of each annular slider 11 is respectively connected to one end of the adjusting long rod 12, and the other end of each adjusting long rod 12 passes through the corresponding limiting frames 9; a strip slot hole 13 is provided on the surface of each adjusting long rod 12, and a second telescopic clamping assembly 14 is slidably connected below the strip slot hole 13, and a second clamping block 15 is installed on the lower end surface of the second telescopic clamping assembly 14.

[0032] Therefore, when dealing with rigid thin plates of different shapes, the sliding block 8 slides in the corresponding slide rail 7, and the limiting frame 9 limits the adjustment rod 12, so that one end of each adjustment rod 12 can move axially along the corresponding slide rail 7 along with the sliding block 8, while the other end of the adjustment rod 12 can slide in the annular groove 10 through the annular slider 11, so that the adjustment rod 12 can rotate around the center disk 2, thereby achieving rotational adjustment of the adjustment rod 12 within a certain angle. In addition, by providing a strip slot 13 in the adjustment rod 12, the second telescopic clamping assembly 14 can slide along the strip sliding groove 4 to achieve axial position adjustment of the second telescopic clamping assembly 14 in the adjustment rod 12. Therefore, through the rotation of the adjustment rod 12 itself and the axial movement of the second telescopic clamping assembly 14 along the adjustment rod 12, it is ensured that each second telescopic clamping assembly 14 can be freely adjusted within the corresponding fan-shaped horizontal plane range. Therefore, when pressing and fixing rigid thin plates of different shapes, the corresponding number of second telescopic pressing assemblies 14 can be adjusted to the corresponding positions within the corresponding range, and then the telescopic shafts of the second telescopic pressing assemblies 14 can drive the second pressing blocks 15 to move downward, so that the corresponding number of second pressing blocks 15 can be pressed against the edges of the rigid thin plates, thereby effectively ensuring that the rigid thin plates can be flattened. This effectively ensures that rigid thin plates of different shapes can maintain a corresponding degree of fit with the heating plate.

[0033] Example six, as a further preferred solution of Example five, the second telescopic pressing assembly 14 includes a second telescopic pressure rod 141, the upper end of the second telescopic pressure rod 141 is fixedly mounted with two ends of the second screw rod 142, the other two ends of the second screw rod 142 pass through the strip slot 13 and are connected to the second locking nut 143, and the lower end of the second telescopic pressure rod 141 is connected to the second pressing block 15 through a telescopic shaft.

[0034] Therefore, when the position of the second telescopic pressing assembly 14 on the adjusting rod 12 needs to be adjusted, the second locking nut 143 can be loosened first, allowing the second screw rod 142 to slide axially along the strip-shaped slot 13. After sliding to the appropriate position, the locking nut 143 can be tightened again to fix the position of the second telescopic pressing rod 141. The second pressing block 15 can then be driven downward by the telescopic shaft of the second telescopic pressing rod 141 to press against the edge of the rigid sheet.

[0035] Embodiment 7, as a further preferred embodiment of embodiment 5, the second pressing block 15 is made of a high thermal resistance material. Specifically, the high thermal resistance material can be directly an inorganic or organic high thermal resistance and high strength material such as wood board, polystyrene, polytetrafluoroethylene, red brick, alumina aerogel, refractory brick, etc., or it can be a composite structure formed by a metal outer layer wrapped with cotton cloth, rubber, Teflon, etc. with high thermal resistance. In this embodiment, it is preferably made of a composite structure formed by a metal outer layer wrapped with rubber. This ensures that the heating plate can effectively reduce the heat conduction effect between the second pressing block 15 and the rigid thin plate during the heating process, while maintaining sufficient mechanical strength to compress the edge of the thin sheet.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An edge pressing device for heating large-area thin sheets in a flat furnace, characterized by: The invention comprises a square frame (1) and a central disk (2), wherein the central disk (2) is arranged at the center of the square frame (1), the four corner positions of the square frame (1) are respectively connected to one end of a diagonal rod (3), the other end of each diagonal rod (3) is connected to the central disk (2), the surface of each diagonal rod (3) is provided with a strip sliding groove (4), and a first telescopic pressing assembly (5) is slidably connected below the strip sliding groove (4); a first pressing block (6) is installed on the lower end surface of the first telescopic pressing assembly (5); the first pressing block (6) is used for pressing on the edge of a rigid thin plate.

2. The edge pressing device for heating large-area thin slices in a flat furnace according to claim 1, characterized in that: The first telescopic pressing assembly (5) includes a first telescopic pressing rod (51), the upper end of the first telescopic pressing rod (51) is fixedly mounted with one end of a first screw rod (52), the other end of the first screw rod (52) passes through a strip-shaped sliding groove (4) and is connected to a first locking nut (53), and the lower end of the first telescopic pressing rod (51) is connected to a first pressing block (6) via a telescopic shaft.

3. The edge pressing device for heating large-area thin slices in a flat furnace according to claim 1, characterized in that: The first pressing block (6) is an L-shaped structure and is used for pressing at the corner position of the rigid thin plate.

4. The edge pressing device for heating large-area thin slices in a flat furnace according to claim 1, characterized in that: Slide rails (7) are provided on the upper surfaces of the four sides of the square frame (1), and at least one sliding block (8) is slidably connected to each of the slide rails (7), and a limiting frame (9) is fixedly connected above the sliding block (8); The side of the center disk (2) is provided with an annular groove (10), and a plurality of annular sliders (11) are slidably connected in the annular groove (10), and the number of the annular sliders (11) is the same as the number of the sliding blocks (8). The outer side surface of each annular slider (11) is respectively connected to one end of the adjusting long rod (12), and the other end of each adjusting long rod (12) passes through the corresponding limiting frames (9); a strip slot (13) is provided on the surface of each adjusting long rod (12), and a second telescopic pressing assembly (14) is slidably connected below the strip slot (13), and a second pressing block (15) is installed on the lower end surface of the second telescopic pressing assembly (14).

5. The edge pressing device for heating large-area thin slices in a flat furnace according to claim 4, characterized in that: The second telescopic pressing assembly (14) includes a second telescopic pressing rod (141), the upper end of the second telescopic pressing rod (141) is fixedly mounted with two ends of a second screw rod (142), the other two ends of the second screw rod (142) pass through the strip slot (13) and are connected to the second locking nut (143), and the lower end of the second telescopic pressing rod (141) is connected to the second pressing block (15) through a telescopic shaft.

6. The edge pressing device for heating large-area thin slices in a flat furnace according to claim 4, characterized in that: The first pressing block (6) and the second pressing block (15) are both made of high heat resistance material.

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