Special flange brick for forming photovoltaic glass and temperature control system

Abstract

The utility model provides a special flange brick for forming photovoltaic glass and a temperature control system. The special flange brick comprises a brick body, at least one side of the working surface of the brick body is provided with the flange plate; the heating chamber is connected between one side of the working surface of the brick body and the flange plate, a heating element is accommodated in the heating chamber, and the heating element is not in contact with the flange plate; under the condition that the integral structural integrity of the brick body is guaranteed, the heating chamber is connected to one side close to the working surface, and the heating element is accommodated in the heating chamber to heat the brick body, so that on one hand, due to the machinability of the inner wall of the cavity of the heating chamber, smaller edge loss can be guaranteed, and higher heat transfer efficiency can also be guaranteed; on the other hand, the heating chamber cavity and the brick body on the outer side of the heating chamber cavity can further play a role in heat preservation and heat insulation, heat loss is reduced, in addition, compared with a natural gas edge fire gun, the electric heating temperature control system can achieve temperature control and monitoring, operation is more stable, heating efficiency is higher, energy consumption is lower, and cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of glass preparation equipment technology, and in particular to a special edge retaining brick and temperature control system for photovoltaic glass forming. Background Technology

[0002] With the development of the glass industry, especially the continuous expansion of rolled glass production scale and the increasing requirements for product quality, precise control of the forming process has become crucial. Edge blocks provide important technical support for the forming process. Existing edge blocks all have the same problem: heat dissipation at the edges, resulting in a large lateral temperature difference during glass forming in front of the rolling roll. That is, the temperature is low on both sides of the edge block and high in the middle. This not only increases the lateral thickness difference of the glass sheet, but also causes defects such as "roller lines" and "crystallization stones" due to the low edge temperature, reducing the overall yield of the glass sheet.

[0003] The current application of edge-blocking bricks by domestic photovoltaic glass manufacturers is quite complex, with various shapes, primarily using zircon mullite and zircon mullite + 2080 edge-blocking iron. Pure mullite edge-blocking bricks offer good insulation but suffer from high edge loss, resulting in a low yield. Zircon mullite + 2080 edge-blocking iron bricks have a front sharp corner that aligns perfectly with the arc surface of the gap between the upper and lower pressure rollers, effectively preventing the amount of molten glass overflowing from the gap between the upper and lower pressure rollers and the edge-blocking brick. This results in less edge loss and a higher yield. However, due to the rapid heat dissipation of the metal material, the already low temperature of the molten glass at the edges further decreases, quickly causing defects such as "pressure roller lines" and "crystallization lines," affecting glass quality. Both types of edge-blocking bricks develop defects like "pressure roller lines" and "crystallization lines" after a period of use. The current solution is to heat the molten glass using a side torch that mixes natural gas and compressed air to address these defects. However, this method has low heating efficiency, high energy consumption, high cost, and poor controllability (unstable gas pressure and fluctuating natural gas calorific value).

[0004] Chinese patent CN203048774U discloses a silicon molybdenum rod-type edge block for a microcrystalline glass rolling mill, comprising a first edge block part, a second edge block part, an inner groove, and a silicon molybdenum rod. The first edge block part has an inner groove, and the silicon molybdenum rod is disposed in the inner groove. The first edge block part is connected to the second edge block part on one side of the inner groove. This invention effectively solves the problems of glass crystallization and edge plate warping caused by the low edge temperature of the molten glass during rolling. It is also simple to operate and easy to control, increasing the product yield by 15%. Furthermore, the replacement interval for the rolling mill is extended from once every 3 days to once every 15 days, reducing production costs and increasing product output.

[0005] However, this technical solution has the following shortcomings: In terms of the width of the kiln overflow port, photovoltaic glass is much wider than microcrystalline glass, which may cause the temperature of the glass melt in the middle area to be too high, resulting in production accidents such as sticking to the roller and wrapping around the roller; In terms of the degree of crystallization, photovoltaic glass is much smaller than microcrystalline glass, and the glass melt at the edge needs less heat to be added; In terms of the edge bricks, the shapes are very different, and this form is not suitable for photovoltaic glass kilns. Summary of the Invention

[0006] One of the objectives of this invention is to address the shortcomings of existing technologies by providing a special edge-blocking brick and temperature control system for photovoltaic glass forming. While ensuring the overall structural integrity of the brick, a heating chamber is connected and installed near the working surface. Heating elements are housed within the heating chamber to heat the brick. On one hand, the machinability of the inner wall of the heating chamber ensures minimal edge loss and rapid heat transfer efficiency. On the other hand, the heating chamber and the brick outside it also provide insulation, reducing heat loss. Furthermore, compared to a natural gas edge-blocking torch, the electric heating temperature control system offers better temperature control and monitoring, resulting in more stable operation, higher heating efficiency, lower energy consumption, and lower cost.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A special edge-blocking brick for photovoltaic glass forming includes: a brick body; an edge-blocking plate, wherein the edge-blocking plate is provided on at least one side of the working surface of the brick body; and a heating chamber, wherein the heating chamber is further connected between the working surface of the brick body and the edge-blocking plate, the heating chamber accommodating a heating element, and the heating element is disposed in a manner that does not contact the edge-blocking plate.

[0009] As an improvement, the heating element is configured as a U-shaped or double-helix straight rod, with the positive and negative terminals for connecting the electrical circuit located at the same end of the heating element. These positive and negative terminals are installed on the top or bottom of the heating chamber and exposed.

[0010] As an improvement, the heating element is configured as a double-helix straight rod, and an insulated mounting base is provided on both the top plate and the bottom plate of the heating chamber. At least one set of mounting holes A are correspondingly opened on the mounting base, and at least one set of heating elements are provided and limited to the mounting holes A. The top plate is correspondingly opened with mounting holes B for the heating element to pass through in a non-contact manner.

[0011] As an improvement, the mounting base is installed on the upper part of the top plate, and the mounting hole A of the mounting base is through-hole, while the mounting hole A of the mounting base on the bottom plate is not through-hole. The heating element is supported by the mounting base and is not in contact with the heating chamber. The mounting base is made of insulating material.

[0012] As an improvement, the heating element includes: a U-shaped portion, which is non-contactly housed in the heating chamber; and a straight rod portion, which is vertically arranged and has a straight rod portion horizontally connected to each of its two ends. A mounting groove is horizontally opened on the brick body, and the straight rod portion is housed in the mounting groove with both ends exposed outside the brick body. One exposed end is connected to the U-shaped portion, and the other end is connected to an electrical circuit.

[0013] As an improvement, the two ends of the U-shaped portion are arranged facing upwards or downwards; the mounting groove is configured to be built into the brick body or to be a semi-groove structure opened on the wall of the brick body.

[0014] As an improvement, the heating element is insulated from the heating chamber and the baffle plate.

[0015] As an improvement, the heating element is a silicon carbide rod or a silicon molybdenum rod.

[0016] As an improvement, the brick body is further encased in a protective structure, which is one or both of refractory material filler and protective plate.

[0017] As an improvement, a tie rod is connected to one side of the brick relative to its working surface, the tie rod being used to pull the brick outward to separate it from the heating element.

[0018] As an improvement, the tie rod is connected to a protective structure surrounding the brick body or directly plugged into the brick body.

[0019] As an improvement, a partition for limiting the insulation of the heating element is also provided between the baffle plate and the heating element.

[0020] As an improvement, the brick body, heating chamber, and side plate are connected by welding or by fasteners through through openings.

[0021] As an improvement, the heating elements are arranged in several groups side by side, and the positive and negative terminals of the several groups of heating elements are fastened together in series by fasteners.

[0022] This utility model also provides a temperature control system, including an electrical control box, characterized in that the system is used to control and adjust the temperature of the edge bricks described in any of the above claims, and a thermocouple is also installed inside the edge bricks, and the thermocouples and heating elements are electrically connected to the electrical control box.

[0023] The beneficial effects of this utility model are as follows:

[0024] (1) This utility model ensures the integrity of the overall structure of the brick body by connecting and setting a heating chamber on the side close to the working surface, and accommodating heating elements in the heating chamber to heat the brick body, ensuring that at least the edge plate on the working surface maintains a stable working temperature, improving the overall yield of the glass sheet, and forming an independent heating space by setting a separate heating chamber, resulting in uniform overall heating and good heating uniformity of the edge plate. In addition, it retains the inner shape of the steel edge brick and ensures minimal glass edge damage.

[0025] (2) In this utility model, the heating element is insulated from the heating chamber and the baffle plate. The frame structure and limiting design of the heating chamber cavity include a non-metallic partition. The special installation structure of the brick body or the addition of the partition can achieve insulated installation. The special installation structure is stable and reliable, preventing the heating element from directly contacting the outer shell of the heating chamber cavity and the baffle plate, avoiding electrical conductivity, and ensuring the personal safety of the operator. The heating element has a high temperature when working, which can easily cause burns to the operator. The partition can protect the heating element and the operator, further improving work safety. In addition, the protective structure can also reduce heat loss and ensure that the heating effect is effectively transferred to the glass melt.

[0026] (3) This utility model sets heating elements and an automatic power adjustment system on the inner side of the retaining brick, uses thermocouples to monitor the internal temperature of the heating chamber and transmits signals to the temperature control cabinet, thereby effectively adjusting the heating output power and actively heating to offset the heat dissipation at the edge, ensuring that the temperature of the glass liquid on both sides does not drop, thus fundamentally solving the process problem of low glass temperature in the retaining brick area.

[0027] In summary, this utility model has the advantages of stable structure, uniform heating, strong safety, and high degree of automation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Example 2;

[0029] Figure 2 This is a partial structural diagram of Example 2;

[0030] Figure 3 for Figure 2 Another perspective view;

[0031] Figure 4 This is a schematic diagram of the double-helix straight rod heating element in Example 2;

[0032] Figure 5 This is a schematic diagram of the overall structure of Example 3;

[0033] Figure 6 This is a partial structural diagram of Example 3;

[0034] Figure 7 for Figure 6 A sectional view;

[0035] Figure 8 for Figure 6 Another perspective view;

[0036] Figure 9 This is a schematic diagram of the overall structure of Example 4;

[0037] Figure 10 This is an exploded view of the overall structure of Example 4;

[0038] Figure 11 This is a partial structural cross-sectional view of Example 4. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In the description of this utility model, 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., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Example 1

[0042] A special edge-blocking brick for photovoltaic glass forming includes: a brick body 1; an edge-blocking plate 4, wherein the edge-blocking plate 4 is provided on at least one side of the working surface of the brick body 1; and a heating chamber 2, wherein the heating chamber 2 is further connected between the working surface of the brick body 1 and the edge-blocking plate 4, the heating chamber 2 accommodating a heating element 3, and the heating element 3 is disposed in a non-contact manner with the edge-blocking plate 4.

[0043] In this embodiment, by setting a heating chamber 2 in the brick body 1 and the side plate 4, and accommodating the heating element 3 in the heating chamber 2, an independent heating space is formed, resulting in uniform heating of the whole and good heating uniformity of the side plate 4.

[0044] It should be noted that the heating chamber 2 is made of heat-resistant stainless steel / nickel-chromium alloy.

[0045] Specifically, the working surface is the side that comes into contact with the molten glass.

[0046] As a preferred embodiment, side plates 4 are provided on both sides of the brick body 1.

[0047] As an improvement, the brick body 1, heating chamber 2 and side plate 4 are connected by welding or by series connection through through openings with fasteners such as screws and nuts.

[0048] As a preferred embodiment, the side plate 4 and the brick 1 are fixed by fasteners. The specific structure is similar to the baffle structure in the Chinese patent application filed by the applicant in CN202421019923.7, and will not be described in detail here. The specific connection method and connection position are adapted to different shapes of the side plate bricks.

[0049] Example 2

[0050] like Figure 1-4 As shown, components that are the same as or corresponding to those in Embodiment 1 above are referred to using the same reference numerals as those in Embodiment 1 above. For simplicity, only the differences from Embodiment 1 above will be described below. The difference between this embodiment and Embodiment 1 above is that:

[0051] As an improvement, the heating element 3 is configured as a U-shaped or double-helix straight rod, with the positive and negative terminals for connecting the electrical circuit located at the same end of the heating element 3. These positive and negative terminals are installed on the top or bottom of the heating chamber 2 and exposed.

[0052] As an improvement, the heating element 3 is configured as a double-helix straight rod. The top plate 21 and bottom plate 22 of the heating chamber 2 are both provided with insulated mounting bases 8. At least one set of mounting holes A81 are correspondingly opened on the mounting base 8. The heating element 3 is provided with at least one set and is limited and installed in the mounting holes A81. The top plate 21 is correspondingly provided with mounting holes B211 for the heating element 3 to pass through in a non-contact manner.

[0053] It should be noted that the double-helix straight rod-shaped heating element 3 has a structure that is existing technology, such as... Figure 4 As shown, it will not be elaborated further here.

[0054] As an improvement, the mounting base 8 is installed on the upper part of the top plate 21 and the mounting hole A81 of the mounting base 8 is through-hole. The mounting hole A81 of the mounting base 8 on the bottom plate 22 is not through-hole. The heating element 3 is supported by the mounting base 8 and is not in contact with the heating chamber 2. The mounting base 8 is made of insulating material.

[0055] Example 3

[0056] like Figure 5-8 As shown, components that are the same as or corresponding to those in Embodiment 1 above are referred to using the same reference numerals as those in Embodiment 1 above. For simplicity, only the differences from Embodiment 1 above will be described below. The difference between this embodiment and Embodiment 1 above is that:

[0057] As an improvement, the heating element 3 includes: a U-shaped portion 31, which is non-contactly housed in the heating chamber 2; and a straight rod portion 32, wherein the U-shaped portion 31 is vertically arranged and each of its two ends is horizontally connected to a straight rod portion 32, a mounting groove 11 is horizontally opened on the brick body 1, the straight rod portion 32 is housed in the mounting groove 11 and both ends are exposed on the brick body 1, one exposed end is connected to the U-shaped portion 31 and the other end is connected to an electrical circuit.

[0058] As an improvement, the two ends of the U-shaped portion 31 are arranged downwards; the mounting groove 11 is configured to penetrate the brick body 1 internally.

[0059] As an improvement, a pull rod 9 is connected to one side of the brick 1 relative to its working surface, the pull rod 9 being used to pull the brick 1 outward to separate it from the heating element 3.

[0060] As an improvement, the tie rod is connected to the protective structure surrounding the brick body 1 or directly plugged into the brick body 1.

[0061] Example 4

[0062] like Figure 9-11As shown, the components in this embodiment that are the same as or corresponding to those in Embodiment 3 above are referred to by the same reference numerals as those in Embodiment 3 above. For simplicity, only the differences from Embodiment 3 above will be described below. The difference between this embodiment and Embodiment 3 above is that:

[0063] As an improvement, the two ends of the U-shaped portion 31 are arranged facing upwards; the mounting groove 11 is configured as a semi-groove structure opened on the wall surface of the brick body 1.

[0064] As a preferred implementation method, such as Figure 10-11 As shown, the mounting groove 11 is configured as a semi-groove structure opened on the upper wall of the brick body 1, thereby supporting and effectively accommodating the straight rod part 32, and preventing the silicon carbide rod or silicon molybdenum rod from being worn down and falling off, causing electrical conductivity and affecting the safety of personnel and equipment.

[0065] In Examples 2 to 4:

[0066] As an improvement, the brick body 1 is also covered with a protective structure, which is one or both of refractory material filler or protective plate 6. The refractory material filler can be applied by coating or by filling.

[0067] As an improvement, the heating element 3 is insulated from the heating chamber 2 and the baffle plate 4.

[0068] As an improvement, a partition 5 for limiting the insulation of the heating element 3 is also provided between the baffle plate 4 and the heating element 3.

[0069] It should be noted that the partition 5 can be made of high-temperature resistant non-metallic material, such as alumina (corundum sheet) / alumina silicate fiberboard or non-metallic brick. The partition 5 can further protect the heating element 3, prevent the heating element 3 from directly contacting the baffle plate 4, and at the same time make the internal heat more effectively utilized, reducing the energy input required to maintain the temperature, thereby improving thermal efficiency.

[0070] As an improvement, the heating element 3 is a silicon carbide rod or a silicon molybdenum rod.

[0071] In a preferred embodiment, several groups of heating elements 3 are arranged side by side, and the positive and negative terminals of the several groups of heating elements 3 are fastened together in series by fasteners 30.

[0072] It should be noted that in order to achieve uniform heating of the working surface of the edge brick, the heating elements 3 are selected to be evenly arranged to cover the side wall of the working surface. Of course, they can also be arranged according to the actual working conditions. The advantage of this arrangement is that the heating elements 3 in the heating tank 2 can heat the edge plate on the working surface of the brick 1 more evenly.

[0073] Example 5

[0074] This embodiment provides a temperature control system, including an electrical control box. The system is used to control and adjust the temperature of the retaining brick described in any of the above embodiments. A thermocouple 71 is also installed inside the retaining brick. The thermocouple 71 and the heating element 3 are both electrically connected to the electrical control box.

[0075] This embodiment uses a temperature control system to control the temperature of the heating element and monitor the working temperature of the brick. The thermocouple 71 is located near the working surface of the brick to monitor the working temperature. The heating element 3 actively heats the brick to counteract its heat dissipation, thus solving the problem of low working surface temperature and achieving a high degree of automation.

[0076] It should be noted that thermocouple 71 is existing technology and will not be described in detail here.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special edge brick for forming photovoltaic glass, characterized in that, The system comprises: a brick body (1); a baffle plate (4) arranged on at least one side of the working surface of the brick body (1); and a heating chamber (2) arranged between the working surface of the brick body (1) and the baffle plate (4), wherein the heating chamber (2) contains a heating element (3) which is arranged in a non-contact manner with the baffle plate (4).

2. A special edge brick for forming photovoltaic glass according to claim 1, characterized in that, The heating element (3) is arranged in a U-shaped or double helix straight rod shape, and the positive and negative terminals for connecting an electric circuit are arranged at the same end of the heating element (3), and the positive and negative terminals are arranged on the top or bottom of the heating chamber (2) and exposed.

3. A special edge brick for forming photovoltaic glass according to claim 1, characterized in that, The heating element (3) is arranged in a double helix straight rod shape, and the top plate (21) and the bottom plate (22) of the heating chamber (2) are provided with insulating mounting seats (8), at least one set of mounting holes A (81) are arranged on the mounting seats (8), and at least one set of the heating element (3) is arranged in the mounting holes A (81) and is limited and mounted; the top plate (21) is provided with a mounting hole B (211) for the heating element (3) to pass through in a non-contact manner.

4. The special edge brick for forming photovoltaic glass according to claim 1, characterized in that, The heating element (3) comprises: a U-shaped part (31) arranged in a non-contact manner in the heating chamber (2); and a straight rod part (32), the U-shaped part (31) is vertically arranged and each end of the U-shaped part (31) is horizontally connected with a straight rod part (32), the brick body (1) is provided with a mounting groove (11), the straight rod part (32) is arranged in the mounting groove (11) and both ends of the straight rod part (32) are exposed to the brick body (1), one exposed end is connected with the U-shaped part (31) and the other exposed end is connected with an electric circuit.

5. A special edge brick for forming photovoltaic glass according to claim 4, characterized in that, The two ends of the U-shaped part (31) are arranged upward or downward, and the mounting groove (11) is arranged as a built-in through hole of the brick body (1) or as a half groove structure arranged on the wall surface of the brick body (1).

6. A special edge brick for forming photovoltaic glass according to any one of claims 1 to 5, characterized in that, The heating element (3), the heating chamber (2) and the baffle plate (4) are all arranged in an insulating manner.

7. A special edge brick for forming photovoltaic glass according to any one of claims 1 to 5, characterized in that, The heating element (3) is a silicon-carbon rod or a silicon-molybdenum rod.

8. A special edge brick for forming photovoltaic glass according to any one of claims 1 to 5, characterized in that, The brick body (1) is further provided with a protective structure, which is one or both of a refractory material filler and a protective plate (6).

9. A shaped edge brick for photovoltaic glass according to claim 4 or 5, characterized in that, The brick body (1) is connected with a pull rod (9) on one side of the working surface, and the pull rod (9) is used to pull the brick body (1) outward to separate the brick body (1) from the heating element (3).

10. A special edge brick for forming photovoltaic glass according to claim 6, characterized in that, An insulating partition (5) is arranged between the baffle plate (4) and the heating element (3) to limit the heating element (3).

11. A special edge brick for forming photovoltaic glass according to any one of claims 1-5, characterized in that, The brick body (1), the heating chamber (2) and the baffle plate (4) are connected by welding or fastening.

12. A temperature control system comprising an electric control box, characterized in that The system is used for controlling and adjusting the temperature of the baffle brick of any one of claims 1-11, and a thermocouple (71) is further arranged in the baffle brick, and the thermocouple (71) and the heating element (3) are electrically connected with an electric control box.

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