Heating device of glass overflow pull-down forming furnace

Abstract

The utility model discloses a heating device of a glass overflow pull-down forming furnace, which comprises a plate body and a heating surface arranged on one side of the plate body, the heating surface can present a first state with a heating plane and a heating convex surface, and the distance between the heating convex surface and the plate body is larger than the distance between the heating plane and the plate body. According to the heating device provided by the utility model, the corresponding heating convex surface can be correspondingly formed according to the convex part on the solution belt, and the distance between the heating surface and the glass solution belt is reduced through the heating convex surface, so that the heating efficiency of the heating device on the convex part area is improved, the flowability of liquid on the glass solution belt is improved, and further local thickness reduction is realized; and the thickness of the glass solution zone is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of glass production, in particular to a heating device for a glass overflow down-drawing forming furnace. Background Art

[0002] In the process of glass production using the overflow down-draw method, when the molten glass overflows from the overflow brick and enters the molding furnace, the glass will gradually harden as the temperature is controllably lowered until it reaches the hardening point. The thickness control and molding of the glass are completed at this stage. According to subsequent inspections of the molded glass, if it is found that the thickness of a certain area of ​​the glass does not meet the standard, the thickness of the glass will be adjusted by changing the temperature of the corresponding interval in the molding furnace.

[0003] When the thickness of a certain area of ​​the glass exceeds the standard, the temperature of the area is appropriately increased in the molding furnace to reduce the viscosity of the solution in this interval on the glass solution belt, increase the fluidity of the liquid on the glass solution belt, and then achieve local thinning and reduce the thickness of the glass solution belt in this area. When the local thickness protrusion of the glass is large and the heater power in the molding furnace exceeds the upper limit of process control, the heating power in the molding area cannot be increased indefinitely to avoid damage to the heating device and affect the quality of glass production. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model provides a heating device for a glass overflow down-draw molding furnace.

[0005] The utility model proposes a glass overflow down-draw molding furnace heating device, comprising: a plate body, a heating surface on one side of the plate body, the heating surface can present a first state of having a heating plane and a heating convex surface, the distance between the heating convex surface and the plate body is greater than the distance between the heating plane and the plate body.

[0006] As a further optimization of the above scheme, the central axis position of the heating convex surface is aligned with the central axis position of the protruding portion of the glass solution band, and the heating convex surface presents a shape that gradually expands toward both sides along the extension direction of the central axis from the starting point position aligned with the protruding portion of the glass solution band, and the heating convex surface is arranged symmetrically about the central axis.

[0007] As a further optimization of the above scheme, the distance between the starting point position on the heating convex surface aligned with the protruding portion of the glass solution band and the plate body is greater than the distance between other positions on the heating convex surface and the plate body, and the distance between other positions on the heating convex surface and the plate body gradually decreases with the increase of the distance from the initial point position until it is consistent with the distance between the heating plane and the plate body.

[0008] As a further optimization of the above solution, the heating surface can also present a second state of only having a heating plane, and the first state and the second state of the heating surface can be converted into each other.

[0009] As a further optimization of the above solution, the width of the heating surface on the side wall of the plate body is greater than the width of the glass solution band to be processed.

[0010] As a further optimization of the above solution, a plurality of driving members are arranged in an array on the same side of the plate body, a heating member is fixedly mounted on the output end of each driving member, and the output end surfaces of the plurality of heating members together constitute a heating surface.

[0011] In the utility model, the proposed heating device forms a corresponding heating convex surface according to the protrusion on the solution belt, reduces the distance between the heating surface and the glass solution belt by heating the convex surface, improves the heating efficiency of the heating device on the protrusion area, improves the fluidity of the liquid on the glass solution belt, and then achieves local thickness thinning and reduces the thickness of the glass solution belt in this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of an implementation of a heating device for a glass overflow down-draw molding furnace proposed by the utility model;

[0013] Figure 2 It is a top view structural schematic diagram of an embodiment of a heating device for a glass overflow down-draw molding furnace proposed by the utility model;

[0014] Figure 3 A side view of a heating device for a glass overflow down-draw molding furnace according to the present invention. Figure 1 ;

[0015] Figure 4 A side view of a heating device for a glass overflow down-draw molding furnace according to the present invention. Figure 2 . DETAILED DESCRIPTION

[0016] like Figure 1 As shown, Figure 1 The utility model is a structural schematic diagram of an implementation of a heating device for a glass overflow down-draw molding furnace.

[0017] Reference Figure 1 The utility model proposes a glass overflow down-draw molding furnace heating device, comprising: a plate body 1, a heating surface on one side of the plate body 1, the heating surface can present a first state of having a heating plane and a heating convex surface, the distance between the heating convex surface and the plate body 1 is greater than the distance between the heating plane and the plate body 1.

[0018] During the specific working process of the heating device of this embodiment, the heating device of this application is first installed on the inner wall of the molding furnace, and the molding furnace is installed under the overflow brick, and the heating surface of the heating device faces the surface of the glass solution belt in the molding furnace. When there is a protrusion on the surface of the glass solution belt entering the molding furnace, the heating device is adjusted so that the heating surface presents a first state, and a corresponding heating convex surface is formed according to the protrusion on the solution belt. By heating the convex surface, the distance between the heating surface and the glass solution belt is reduced, thereby improving the heating efficiency of the heating device on the protrusion area, improving the fluidity of the liquid on the glass solution belt, and then achieving local thickness thinning and reducing the thickness of the glass solution belt in this area.

[0019] During the use of the heating device of the present application, when multiple protrusions appear on the surface of the glass solution ribbon, the staff can adjust the heating device so that multiple groups of corresponding heating convex surfaces appear on the heating surface, and the heating devices can be installed on a group of relative inner walls of the molding furnace, so that the heating surfaces of the heating devices on both sides can clamp the glass solution ribbon entering the molding furnace, thereby further improving the heating efficiency of the heating device on the glass solution ribbon.

[0020] During the actual use of the present application, since the glass solution band is always in a falling motion state, the protrusions on the surface of the glass solution band will synchronously show a downward motion state, and the protrusions will gradually melt and diffuse to the surrounding areas under the heating action of the heated convex surface. The central axis position of the heated convex surface of the present application is aligned with the central axis position of the protrusion of the glass solution band, and the heated convex surface presents a shape that gradually expands to both sides along the extension direction of the central axis from the starting point position aligned with the protrusion of the glass solution band, and the heating convex surface is arranged symmetrically about the central axis.

[0021] During the movement of the protrusions on the surface of the glass solution ribbon moving downward synchronously, the protrusions will gradually melt and diffuse to the surrounding areas under the heating action of the heated convex surface, and by changing the distance between the heating surface and the plate body 1 according to the height of the protrusions, the distance between the starting point position aligned with the protrusion of the glass solution ribbon on the heating convex surface and the plate body 1 is greater than the distance between other positions on the heating convex surface and the plate body 1, and the distance between other positions of the heating convex surface and the plate body 1 gradually decreases with the increase of the distance from the initial point position until it is consistent with the distance between the heating plane and the plate body 1, so that the heating efficiency of the glass solution ribbon at the starting point on the heating convex surface is the maximum, and the heating efficiency of the glass solution ribbon at other places on the heating convex surface gradually decreases with the increase of the distance from the initial point position until it is consistent with the heating efficiency of the heating plane.

[0022] During the specific operation of the heating device of this embodiment, when there is no protrusion on the surface of the glass solution ribbon entering the forming furnace, the heating surface can also present a second state of only having a heating plane, and the first state and the second state of the heating surface can be converted to each other.

[0023] In this embodiment, the width of the heating surface on the side wall of the plate body 1 is greater than the width of the glass solution band to be processed.

[0024] A plurality of driving members 3 are arranged in an array on the same side of the plate body 1, and a heating member 2 is fixedly mounted on the output end of each driving member 3. The output end surfaces of the plurality of heating members 2 together constitute a heating surface, so that the heating surface is composed of a plurality of heating points, thereby improving the flexibility of the heating surface adjustment process.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heating device for a glass overflow down-draw molding furnace, characterized in that: include: A plate body (1) has a heating surface on one side of the plate body (1), the heating surface can present a first state having a heating plane and a heating convex surface, the distance between the heating convex surface and the plate body (1) being greater than the distance between the heating plane and the plate body (1).

2. The heating device according to claim 1, characterized in that The central axis position of the heating convex surface is aligned with the central axis position of the protruding portion of the glass solution band. The heating convex surface presents a shape that gradually expands toward both sides along the extension direction of the central axis from the starting point position aligned with the protruding portion of the glass solution band, and the heating convex surface is arranged symmetrically about the central axis.

3. The heating device according to claim 2, characterized in that: The distance between the starting point position on the heating convex surface aligned with the protruding portion of the glass solution band and the plate body (1) is greater than the distance between other positions on the heating convex surface and the plate body (1), and the distance between other positions on the heating convex surface and the plate body (1) gradually decreases as the distance from the starting point position increases until it is consistent with the distance between the heating plane and the plate body (1).

4. The heating device according to claim 1, characterized in that The heating surface can also present a second state having only a heating plane surface, and the first state and the second state of the heating surface can be switched to each other.

5. The heating device according to claim 1, characterized in that: The width of the heating surface on the side wall of the plate body (1) is greater than the width of the glass solution band to be processed.

6. The heating device according to claim 1, characterized in that: A plurality of driving members (3) are arranged in an array on the same side of the plate body (1), a heating member (2) is fixedly mounted on the output end of each driving member (3), and the output end surfaces of the plurality of heating members (2) together form a heating surface.

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