Glass tempering furnace

Abstract

The utility model discloses a glass tempering furnace, belongs to the technical field of glass production, and aims to solve the problems that upper and lower areas of glass are nonuniformly cooled due to existence of a tempering furnace roller way, and the upper and lower areas of the glass are nonuniformly cooled due to the fact that the tempering furnace roller way affects rebound of air below the glass. The furnace comprises a furnace body and a guide rail, a cooling air outlet mechanism is arranged in the furnace body, the cooling air outlet mechanism comprises air grid bags, and each air grid bag comprises an upper air grid bag and a lower air grid bag which are symmetrically arranged above and below glass; the upper air grid bag and the lower air grid bag are respectively provided with upper air grid bars and lower air grid bars, a toughening furnace roller way is arranged between two adjacent lower air grid bars, and two adjacent upper air grid bars are provided with arc-shaped air guide bars matched with the toughening furnace roller way. Under the action of the roller way of the toughening furnace and the arc-shaped air guide strip, the areas on the glass acted by the blown air are basically the same, so that the cooling effect on the glass is basically the same, the cooling uniformity of the upper surface and the lower surface of the glass is better, and the toughening effect of the glass is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of glass production technology, and relates to a glass tempering furnace, and more particularly to a glass tempering furnace that can uniformly cool glass. Background Technology

[0002] As we all know, glass is a fragile material. Therefore, many manufacturers usually temper glass during production to improve its strength and enhance its resistance to wind pressure and impact.

[0003] A glass tempering furnace is typically used in the tempering process of glass. A glass tempering furnace is a process that uses physical or chemical methods to form a compressive stress layer on the surface of the glass and a tensile stress layer inside. When the glass is subjected to external forces, the compressive stress layer can offset some of the tensile stress, preventing the glass from breaking and thus increasing its strength.

[0004] The cooling process in the glass tempering furnace is a crucial step in glass tempering, and its effectiveness directly impacts the quality and performance of the tempered glass. Cooling methods for glass tempering furnaces include air cooling and liquid cooling. Air cooling involves using a fan to evenly blow cool air onto the glass surface, rapidly cooling the glass. Liquid cooling involves immersing the glass in a cooling liquid. Regardless of the method used, the cooling rate and uniformity are key parameters in the cooling process. Generally, a faster cooling rate results in greater compressive stress on the glass surface, leading to better tempering; however, excessively rapid cooling can cause cracks or spontaneous breakage. To achieve uniform cooling, glass tempering furnaces typically employ multiple fans or specially designed cooling devices to ensure that cool air is evenly distributed throughout the glass.

[0005] To achieve better uniform cooling of glass, in addition to rationally arranging fans and optimizing air duct design, most glass tempering furnaces also adopt air grid structures, which means installing multiple sets of air grids at the cooling air nozzles of the glass tempering furnace to blow air out evenly and form a uniform cooling air curtain.

[0006] Utility model patent application number 202010213955.0 discloses a cooling air outlet mechanism for a glass tempering furnace. This mechanism includes several vertically arranged air gratings, each containing several parallel air grating strips. Each air grating strip has an air inlet, and the side facing the tempering furnace roller conveyor has several air outlets. The air outlets on each air grating strip are arranged longitudinally at intervals, while the air outlets on adjacent air grating strips are arranged longitudinally at staggered intervals. This air outlet mechanism, by changing the arrangement of the air outlets on the air grating strips, ensures that the longitudinal air outlets are spaced out, just like the transverse ones, resulting in intermittent and non-continuous longitudinal airflow. This reduces the pressure difference between the upper and lower surfaces of the glass, balances the compressive stress on the upper and lower surfaces of the glass, and makes the air pressure more uniform on the upper and lower surfaces of the glass. This significantly reduces the degree of vertical bending of the four sides of the glass, effectively improving the problem of glass warping.

[0007] While the cooling air outlet mechanism of the aforementioned glass tempering furnace can improve the uniformity of air cooling through evenly spaced air grates and evenly distributed air outlets on each air grate, existing glass tempering furnaces typically have conveyor rollers for transporting the glass below the glass (e.g., those in utility model patent 2020102139550). Figure 5 The tempering furnace roller conveyor (marked as 5) is typically located on only one side (i.e., below the glass, and rarely above). Therefore, the air grates above the glass effectively cool the area between adjacent air grates on the upper surface of the glass (including the area below the corresponding conveyor roller, such as...). Figure 1 (The area highlighted in red) The air vents below the glass can only effectively cool the area on the lower surface of the glass located between the two conveyor rollers. This will cause uneven cooling at the locations corresponding to the tempering furnace rollers on the upper and lower surfaces of the glass, affecting the glass tempering effect. In addition, the air blown by the air vents bounces back after hitting the upper and lower surfaces of the glass. The air below the glass cannot be blown away smoothly due to the presence of the tempering furnace rollers, which will also cause uneven cooling of the glass and affect the glass tempering effect. Utility Model Content

[0008] The purpose of this utility model is to provide a glass tempering furnace to solve the problems of uneven cooling of the upper and lower areas of the glass caused by the presence of the tempering furnace roller conveyor and the uneven cooling of the upper and lower areas of the glass caused by the air rebound under the glass due to the influence of the tempering furnace roller conveyor.

[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0010] A glass tempering furnace includes a furnace body and guide rails disposed on the feeding side and the discharging side of the furnace body. A cooling air outlet mechanism is disposed inside the furnace body. The cooling air outlet mechanism includes a plurality of air gratings arranged vertically. Each air grating includes an upper air grating and a lower air grating symmetrically arranged on the upper and lower surfaces of the glass. Upper air gratings and lower air gratings are respectively provided on the upper air grating and the lower air grating. A tempering furnace roller conveyor is disposed between two adjacent lower air gratings. An arc-shaped air guide strip adapted to the tempering furnace roller conveyor is disposed between two adjacent upper air gratings.

[0011] Furthermore, both the upper and lower wind gratings include a grating body, with a guide slope at the bottom of the grating body and an air outlet at the end of the guide slope.

[0012] Furthermore, the air outlets are located on the discharge side, with the air outlets of the lower air grate having the same air outlet direction as the tangent of the tempering furnace roller conveyor on the discharge side, and the air outlets of the upper air grate having the same air outlet direction as the tangent of the arc-shaped air guide strip on the discharge side.

[0013] Furthermore, an exhaust channel is formed between the guide slope of the lower air grate and the steelmaking furnace roller conveyor on the feed side;

[0014] An exhaust channel is formed between the guide slope of the upper air grid and the arc-shaped air guide on the feed side. An exhaust fan installed in the arc-shaped air guide is also installed in the exhaust channel.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. In this utility model, upper and lower air grates, tempering furnace rollers and arc-shaped air guides are symmetrically arranged above and below the glass. When the air blown out by the upper and lower air grates blows towards the glass, the upper and lower parts of the glass are blocked by the tempering furnace rollers and arc-shaped air guides respectively. The area of ​​the blown air acting on the glass is basically the same, so the cooling effect on the glass is basically the same, and the cooling uniformity of the upper and lower parts of the glass is better.

[0017] Furthermore, due to the action of the tempering furnace roller conveyor and the arc-shaped air guide strip, the tempering furnace roller conveyor and the arc-shaped air guide strip respectively blow the air blown by the upper air grid strip onto the upper surface of the glass and bounce off, and the air blown by the lower air grid strip onto the lower surface of the glass and bounce off. The effect is basically the same, and the cooling of the upper and lower surfaces of the glass is more uniform, which greatly improves the tempering effect of the glass.

[0018] 2. In this utility model, the bottom of the grid body is set as a guide slope, and the air outlet of the grid body is set along the tangential direction of the tempering furnace roller and the arc-shaped guide strip. Therefore, under the rotation of the tempering furnace roller, the tempering furnace roller rotates towards the glass at the air outlet, and the next tempering furnace roller is outward at the opposite corner symmetrical to the air outlet. This will help guide the air blown out of the lower air grid to the side of the glass closer to the discharge and flow in the opposite direction along the glass movement direction, and finally be discharged through the next rotating tempering furnace roller. On the one hand, it can accelerate the flow speed of the gas blown out of the lower air grid, and on the other hand, the glass movement direction is opposite to the gas flow direction, thereby greatly improving the cooling efficiency of the glass.

[0019] 3. In this utility model, an exhaust fan is provided in the exhaust channel between the guide slope of the upper air grid and the arc-shaped guide strip on the feeding side. The function of the exhaust fan is the same as that of the rotating tempering furnace roller, which drives the air blown out by the upper air grid to flow in the opposite direction to the glass movement direction and accelerates the flow of gas, thereby greatly improving the cooling efficiency of the glass. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of a windshield pack in the prior art;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the stroke grid package in this utility model;

[0023] Figure 4 yes Figure 3 Enlarged view at point I;

[0024] Figure 5 This is a schematic diagram of the gas flow after the air is discharged from the wind grid bar in this utility model;

[0025] The attached diagram is labeled as follows: 1-guide rail, 2-furnace body, 3-upper air grate, 4-lower air grate, 5-glass, 6-upper air grate bar, 7-arc-shaped air guide bar, 8-tempering furnace roller conveyor, 9-lower air grate bar, 10-exhaust duct, 11-exhaust fan, 12-air guide slope, 13-air outlet. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] This embodiment provides a glass tempering furnace for uniformly cooling tempered glass. It includes a furnace body 2, with guide rails 1 on both the inlet and outlet sides. Conveying rollers are mounted on the guide rails 1 to move and transport the glass. The glass to be tempered is placed on the guide rails 1 on the inlet side by workers or machines, and then transported into the furnace body 2 for tempering and cooling. The tempered glass is then transported to the guide rails 1 on the outlet side and exited the tempering production line for the next process. To improve the uniformity of cooling the tempered glass, this application innovates the cooling mechanism within the furnace body 2. Specifically, a cooling air outlet mechanism is provided within the furnace body 2 for cooling the tempered glass. This cooling air outlet mechanism includes several vertically arranged air grates, each air grating including an upper air grating 3 and a lower air grating 4 symmetrically arranged above and below the glass 5.

[0030] The above-mentioned parts are all existing technologies. The innovation of this embodiment lies in the innovation of the air grid strips and related components in the air grid package, the guide rail 1, furnace body 2, air grid package and its upper air grid package 3, lower air grid package 4 (excluding the air grid strips and other related components in the air grid package mentioned below), etc. Those skilled in the art can directly apply the relevant existing technologies, especially the relevant structures of the utility model with application number 202010213955.0 disclosed in the background technology, without the need for creative labor.

[0031] The bottom of the upper air grate 3 (i.e., the side closest to the glass 5) is provided with several parallel upper air grate bars 6, and the air blown out by the upper air grate bars 6 blows directly onto the upper surface of the glass 5. The top of the lower air grate 4 (i.e., the side closest to the glass 5) is provided with several parallel lower air grate bars 9, and the air blown out by the lower air grate bars 9 blows directly onto the lower surface of the glass 5. The air outlets on each air grate bar are arranged longitudinally at intervals, and the air outlets on adjacent air grate bars are arranged longitudinally at a staggered interval, so that the combined air outlets on the air grate bars can cover the entire piece of glass 5 on the tempering furnace roller conveyor 8 in the horizontal projection. A tempering furnace roller conveyor 8 for conveying the glass 5 is provided between two adjacent lower air grate bars 9, and an arc-shaped air guide bar 7 adapted to the tempering furnace roller conveyor 8 is provided between two adjacent upper air grate bars 6.

[0032] During operation, the heated and tempered glass is conveyed via the tempering furnace roller conveyor 8, and the upper air grid 6 and lower air grid 9 blow air from the upper and lower surfaces of the glass 5 to cool the glass evenly.

[0033] By symmetrically arranging upper air grating 6 and lower air grating 9, tempering furnace roller conveyor 8 and arc-shaped air guide strips above and below the glass, when the air blown out by the upper air grating 6 and lower air grating 9 blows towards the glass, the upper and lower parts of the glass are blocked by the tempering furnace roller conveyor 8 and arc-shaped air guide strips respectively. The area of ​​the blown air acting on the glass is basically the same, so the cooling effect on the glass is basically the same, and the cooling uniformity of the upper and lower parts of the glass is better.

[0034] In addition, due to the action of the tempering furnace roller conveyor 8 and the arc-shaped air guide strips, the tempering furnace roller conveyor 8 and the arc-shaped air guide strips 7 respectively blow the air blown by the upper air grid strip 6 onto the upper surface of the glass 5 and bounce back, and the air blown by the lower air grid strip 9 onto the lower surface of the glass 5 and bounce back. The effect is basically the same, and the cooling of the upper and lower surfaces of the glass 5 is more uniform, which greatly improves the tempering effect of the glass 5.

[0035] Example 2

[0036] Based on embodiment 1, both the upper wind grating 6 and the lower wind grating 9 include a grating body. The bottom of the grating body is provided with a guide slope 12, and the grating body is provided with an air outlet 13 at the end of the guide slope 12.

[0037] The bottom of the grid body is set as a guide slope, and the air outlet of the grid body is set tangentially along the tempering furnace roller conveyor 8 and the arc-shaped guide strip 7. Therefore, under the rotation of the tempering furnace roller conveyor 8, the tempering furnace roller conveyor 8 rotates towards the glass 5 at the air outlet, and the next tempering furnace roller conveyor 8 is symmetrical to the air outlet and faces outward. This will help guide the air blown out of the air outlet of the lower air grid 9 to the side of the glass 5 closer to the discharge and flow in the opposite direction along the direction of glass 5 movement, and finally be discharged through the next rotating tempering furnace roller conveyor 8. On the one hand, it can accelerate the flow speed of the gas blown out of the lower air grid 9, and on the other hand, the direction of glass 5 movement is opposite to the direction of gas flow, thereby greatly improving the cooling efficiency of glass 5.

[0038] Example 3

[0039] Based on Example 2, the air outlet 13 is opened on the discharge side, the air outlet 13 of the lower air grid 9 has the same air outlet direction as the tangent of the tempering furnace roller conveyor 8 on the discharge side, and the air guide slope 12 of the lower air grid 9 forms an exhaust channel 10 between it and the tempering furnace roller conveyor 8 on the feeding side.

[0040] The air outlet 13 of the upper air grid 6 has the same air outlet direction as the tangent of the arc-shaped air guide 7 on the discharge side. The air guide slope 12 of the upper air grid 6 and the arc-shaped air guide 7 on the feed side form an exhaust channel 10. An exhaust fan 11 installed on the arc-shaped air guide 7 is also provided in the exhaust channel 10.

[0041] Right now Figure 5As shown, the air outlet 13 is located on the left side, and the direction from the left tempering furnace roller conveyor 8 to the right tempering furnace roller conveyor 8 is opposite to the output direction of the glass 5. That is, for two adjacent tempering furnace roller conveyors 8, the left tempering furnace roller conveyor 8 is located on the discharge side and the right tempering furnace roller conveyor 8 is located on the feed side.

[0042] An exhaust fan is installed in the exhaust channel 10 between the guide slope of the upper air grid 6 and the arc-shaped guide strip 7 on the feeding side. The exhaust fan has the same function as the rotating tempering furnace roller 8, driving the air blown out by the upper air grid 6 to flow in the opposite direction to the movement direction of the glass 5 and accelerating the flow of gas, thereby greatly improving the cooling efficiency of the glass 5.

Claims

1. A glass toughening furnace, comprising a furnace body (2), guide rails (1) arranged at the feeding side and discharging side of the furnace body (2), and a cooling air outlet mechanism arranged in the furnace body (2), wherein the cooling air outlet mechanism comprises a plurality of upper and lower air grid packs, each of the air grid packs comprises an upper air grid pack (3) and a lower air grid pack (4) symmetrically arranged above and below the glass (5); characterized in that: An upper wind fence bag (3) and a lower wind fence bag (4) are respectively provided with an upper wind fence strip (6) and a lower wind fence strip (9), two adjacent lower wind fence strips (9) are provided with a toughening furnace roller way (8), and two adjacent upper wind fence strips (6) are provided with an arc-shaped wind guide strip (7) matched with the toughening furnace roller way (8).

2. A glass toughening furnace as claimed in claim 1, characterized in that: The upper wind fence strip (6) and the lower wind fence strip (9) each comprise a strip body, the bottom of the strip body is provided with a wind guide inclined surface (12), and the end of the wind guide inclined surface (12) is provided with an air outlet (13).

3. A glass tempering furnace as claimed in claim 2, characterized in that: The air outlet (13) is arranged on the discharge side, the air outlet direction of the air outlet (13) of the lower wind fence strip (9) is the same as the tangential direction of the toughening furnace roller way (8) on the discharge side, and the air outlet direction of the air outlet (13) of the upper wind fence strip (6) is the same as the tangential direction of the arc-shaped wind guide strip (7) on the discharge side.

4. A glass tempering furnace as claimed in claim 3, characterized in that: The wind guide inclined surface (12) of the lower wind fence strip (9) and the toughening furnace roller way (8) on the feeding side form an exhaust channel (10); The wind guide inclined surface (12) of the upper wind fence strip (6) and the arc-shaped wind guide strip (7) on the feeding side form an exhaust channel (10), and the exhaust channel (10) is further provided with an exhaust fan (11) installed on the arc-shaped wind guide strip (7).

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