An electrically assisted heating glass tempering furnace

Abstract

This utility model provides an electrically assisted heating glass tempering furnace, belonging to the technical field of glass deep processing equipment. It includes a furnace body, a reflector plate located inside the furnace body, and several conveying rollers. The reflector plate is located below the conveying rollers. An electric heating wire is installed at the top of the furnace body. The conveying rollers are arranged alternately. Each conveying roller includes a porous media outer cylinder, a porous media inner cylinder, two sleeves, and an ignition rod. The two sleeves are respectively fixed to both ends of the porous media inner cylinder, located outside the porous media inner cylinder. An inner liner tube is fixedly installed at each end of the porous media outer cylinder, located inside the porous media outer cylinder. The inner liner tube and the sleeve are rotatably connected via bearings. The sleeves are fixedly connected to the furnace body. One end of the porous media inner cylinder has a premixed gas connection pipe, and the ignition rod extends from the other end of the porous media inner cylinder and is inserted inside the porous media inner cylinder. This utility model has advantages such as low energy consumption and uniform glass heating.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass deep processing equipment, and relates to an electrically assisted heating glass tempering furnace. Background Technology

[0002] Currently, the tempering process in the glass deep processing industry generally uses electrically heated tempering furnaces, which are energy-intensive (high carbon emissions) and inefficient. Companies typically try to reduce energy consumption and improve efficiency by implementing energy management and electrical control improvements on top of existing electrically heated tempering furnaces. However, the energy-saving effect is limited, especially for the heating unit, which consumes the most energy; without innovative technologies, it's impossible to significantly reduce energy costs. While gas heating can reduce energy consumption, it cannot meet the requirement of uniform heating across the entire glass sheet during tempering. Furthermore, due to the "dual control of energy consumption" policy, companies' production capacity is limited, making it difficult to meet the high-quality tempered glass demand from downstream industries such as new energy vehicles, photovoltaics, electronics, and construction engineering. Against this backdrop, companies urgently need new heating technologies to upgrade existing tempering equipment, reduce energy costs, improve efficiency, enhance product quality, and boost competitiveness. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by providing an electrically assisted heating glass tempering furnace. The technical problem this invention aims to solve is how to improve the heating uniformity of glass tempering and reduce energy consumption.

[0004] The objective of this utility model can be achieved through the following technical solution: A glass tempering furnace with a porous media combustion system, characterized in that it includes a furnace body, a reflector plate located inside the furnace body, and several conveying rollers. The reflector plate is located below the conveying rollers. An electric heating wire is provided on the top of the furnace body. The conveying rollers are arranged alternately. Each conveying roller includes a porous media outer cylinder, a porous media inner cylinder, two sleeves, and an ignition rod. The two sleeves are respectively fixed at both ends of the porous media inner cylinder. The sleeves are located outside the porous media inner cylinder. An inner liner is fixedly provided at both ends of the porous media outer cylinder. The inner liner is located inside the porous media outer cylinder. The inner liner and the sleeve are rotatably connected by a bearing. The sleeve is fixedly connected to the furnace body. One end of the porous media inner cylinder has a premixed gas connection pipe. The ignition rod is led out from the other end of the porous media inner cylinder and inserted inside the porous media inner cylinder.

[0005] Furthermore, both the porous media inner cylinder and the porous media outer cylinder are made of porous ceramic material.

[0006] Furthermore, the ignition rod extends through the porous media inner cylinder to the space between the porous media inner cylinder and the porous media outer cylinder.

[0007] Furthermore, the ignition rod located between the porous media inner cylinder and the porous media outer cylinder is situated below the outer wall surface of the porous media inner cylinder.

[0008] During the glass tempering process, the glass sheet is located on the conveying roller. The glass moves horizontally, driving the conveying roller to rotate, or the conveying roller is driven to rotate by an external force, causing the glass to move horizontally in the furnace. Multiple glass sheets are heated to achieve tempering.

[0009] This solution uses electric heating as an auxiliary method; however, the electric heating wire is kept away from the glass plate surface, serving to heat the ambient temperature inside the furnace.

[0010] In this scheme, the glass plate surface directly contacts the outer wall of the porous medium outer cylinder. The premixed gas is injected from the porous medium inner cylinder and ignited by the ignition rod inside the porous medium inner cylinder. A relatively uniform thermal radiation environment is formed outside the porous medium inner cylinder. Because the porous medium itself can cause the mixed gas to generate vortices, splits, merges and violently turbulent within the pores of the porous medium, the heat generated by combustion is used to temper and heat the glass through a dual method of preheating the glass surrounding environment in the furnace by high-temperature solid radiation and hot gas convection. This can improve the heating uniformity. In addition, the heat storage capacity of the porous medium material can effectively reduce heat loss and energy consumption.

[0011] Furthermore, this solution combines a porous inner cylinder and a porous outer cylinder, ensuring that the majority of the gas mixture burns within the porous inner cylinder, while a small amount burns between the inner and outer cylinders. This completely prevents gas from overflowing outside the porous medium and burning, thus avoiding open flame heating of the glass. It also further ensures the uniformity of heating on the surface of the porous outer cylinder. Moreover, the rotating porous outer cylinder better utilizes the porosity of the porous material to disturb and convection the hot gas, thus improving the temperature environment. The ignition rod is located below the porous inner cylinder, preventing the local temperature difference caused by gas combustion between the inner and outer cylinders from directly affecting the glass plate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this glass tempering furnace.

[0013] Figure 2 This is a schematic diagram of the glass tempering furnace after the furnace body has been removed.

[0014] Figure 3 This is a schematic diagram of the structure of each conveyor roller in this glass tempering furnace.

[0015] Figure 4 It is an interface diagram of the conveyor roller along the axial direction.

[0016] Figure 5 yes Figure 4 A magnified view of part A in the middle.

[0017] Figure 6 yes Figure 4 A magnified view of part B in the middle.

[0018] Figure 7 This is a cross-sectional view of the conveyor roller.

[0019] In the diagram, 1 is the furnace body; 2 is the reflector; 3 is the conveyor roller; 4 is the porous media outer cylinder; 5 is the porous media inner cylinder; 6 is the sleeve; 7 is the ignition rod; 8 is the inner lining tube; and 9 is the premixed gas connection pipe. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figures 1 to 7 The glass tempering furnace shown includes a furnace body 1, a reflector 2 located inside the furnace body 1, and several conveying rollers 3. The reflector 2 is located below the conveying rollers 3. An electric heating wire is installed on the top of the furnace body. The conveying rollers 3 are arranged alternately. Each conveying roller 3 includes a porous medium outer cylinder 4, a porous medium inner cylinder 5, two sleeves 6, and an ignition rod 7. The two sleeves 6 are respectively fixed at both ends of the porous medium inner cylinder 5 and are located outside the porous medium inner cylinder 5. An inner liner 8 is fixedly installed at both ends of the porous medium outer cylinder 4 and is located inside the porous medium outer cylinder 4. The inner liner 8 and the sleeves 6 are rotatably connected by bearings. The sleeves 6 are fixedly connected to the furnace body 1. One end of the porous medium inner cylinder 5 has a premixed gas pipe 9. The ignition rod 7 is led out from the other end of the porous medium inner cylinder 5 and inserted inside the porous medium inner cylinder 5.

[0022] Both the porous media inner cylinder 5 and the porous media outer cylinder 4 are made of porous ceramic material. These porous ceramic materials are formed by sintering ceramics with a corresponding PPI (Polypropylene Polymer Content).

[0023] The ignition rod 7 extends through the porous medium inner cylinder 5 to the space between the porous medium inner cylinder 5 and the porous medium outer cylinder 4. The ignition rod 7 is an electrically heated metal rod that is inserted into the porous medium inner cylinder 5 and meanders through the porous medium outer cylinder 4. Its two ends are connected to the positive and negative terminals of a power supply, respectively. The ignition rod 7 generates heat through resistance to form a linear ignition element with a temperature higher than the ignition point of the gas.

[0024] The ignition rod 7, located between the porous media inner cylinder 5 and the porous media outer cylinder 4, is below the outer wall surface of the porous media inner cylinder 5.

[0025] During the glass tempering process, the glass plate is located on the conveying roller 3. The glass moves horizontally, driving the conveying roller 3 to rotate, or the conveying roller 3 is driven to rotate by an external force, causing the glass to move horizontally in the furnace. Multiple glass plates are heated to achieve tempering.

[0026] This solution uses electric heating as an auxiliary method; however, the electric heating wire is kept away from the glass plate surface, serving to heat the ambient temperature inside the furnace.

[0027] In this scheme, the glass plate surface directly contacts the outer wall of the porous medium outer cylinder 4. The premixed gas is injected from the porous medium inner cylinder 5 and ignited by the ignition rod 7 inside the porous medium inner cylinder 5. A relatively uniform thermal radiation environment is formed outside the porous medium inner cylinder 5. Since the porous medium itself can cause the mixed gas to generate vortices, splits, merges and violently turbulent within the pores of the porous medium, the heat generated by combustion is used to temper and heat the glass through a dual method of preheating the glass surrounding environment in the furnace by high-temperature solid radiation and hot gas convection, which can improve the heating uniformity. In addition, the heat storage capacity of the porous medium material can effectively reduce heat loss and energy consumption.

[0028] Furthermore, this solution combines a porous inner cylinder 5 and a porous outer cylinder 4, ensuring that the majority of the gas mixture burns within the porous inner cylinder 5, while a small amount burns between the porous inner cylinder 5 and the porous outer cylinder 4. This completely prevents the gas from overflowing outside the porous medium and burning, thus avoiding open flame heating of the glass. It also further ensures the uniformity of heating on the surface of the porous outer cylinder 4. Moreover, the porous outer cylinder 4 is in a rotating state, which allows it to better utilize the porosity of the porous material to disturb and convection the hot gas, thus better managing the temperature environment. The ignition rod 7 is located below the porous inner cylinder 5, which prevents the local temperature difference caused by the combustion of gas between the porous inner cylinder 5 and the porous outer cylinder 4 from directly affecting the glass plate.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A glass tempering furnace with electric assisted heating, characterized in that, The furnace includes a furnace body (1), a reflector plate (2) located inside the furnace body (1), and several conveyor rollers (3). The reflector plate (2) is located below the conveyor rollers (3). An electric heating wire is provided on the top of the furnace body (1). The conveyor rollers (3) are arranged alternately. Each conveyor roller (3) includes a porous medium outer cylinder (4), a porous medium inner cylinder (5), two sleeves (6), and an ignition rod (7). The two sleeves (6) are respectively fixed at both ends of the porous medium inner cylinder (5). The sleeves (6) are located in the porous medium inner cylinder (5). In addition to the porous media outer cylinder (4), an inner liner (8) is fixedly installed at both ends of the porous media outer cylinder (4). The inner liner (8) is located inside the porous media outer cylinder (4). The inner liner (8) and the sleeve (6) are rotatably connected by a bearing. The sleeve (6) is fixedly connected to the furnace body (1). One end of the porous media inner cylinder (5) has a premixed gas pipe (9). The ignition rod (7) is led out from the other end of the porous media inner cylinder (5). The ignition rod (7) is inserted inside the porous media inner cylinder (5).

2. The glass tempering furnace with electric assisted heating according to claim 1, characterized in that, Both the porous media inner cylinder (5) and the porous media outer cylinder (4) are made of porous ceramic material.

3. The glass tempering furnace with electric assisted heating according to claim 2, characterized in that, The ignition rod (7) extends through the porous media inner cylinder (5) to the space between the porous media inner cylinder (5) and the porous media outer cylinder (4).

4. The electrically assisted heating glass tempering furnace according to claim 2, characterized in that, The ignition rod (7) located between the porous media inner cylinder (5) and the porous media outer cylinder (4) is located below the outer wall surface of the porous media inner cylinder (5).

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