Convection heating structure of glass tempering furnace

Abstract

The utility model belongs to the technical field of glass tempering furnaces, particularly relates to a convection heating structure of a glass tempering furnace, and provides the following scheme aiming at the problems of high maintenance cost and possible explosion risk of glass in the background technology: the convection heating structure comprises a convection heating box, and an axial flow fan is fixedly connected to the center of the outer wall of the top of the convection heating box; convection heating air pipes are welded to the two sides of a fan frame of the axial flow fan. The double-sided heating of toughened glass is realized, the structure is simple, the acting effect is good, the installation cost and the maintenance cost are reduced, heat energy in the convection heating box can be respectively conveyed to the upper layer and the lower layer of the preheating box along the two preheating pipes under the action of the air blower, the toughened glass is preheated, and the service life of the toughened glass is prolonged. The problem of explosion of the tempered glass is avoided, when the tempered glass moves into the convection heating box, the tempered glass can be rapidly heated to the required temperature, meanwhile, heat energy is reasonably utilized, and the utilization rate of the heat energy is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of glass tempering furnaces, in particular to a convection heating structure of a glass tempering furnace. Background Art

[0002] A glass tempering furnace is also known as a glass tempering unit, a tempering furnace, tempering equipment, a tempering unit, etc. A glass tempering furnace uses physical or chemical methods to form a compressive stress layer on the glass surface and a tensile stress layer inside; when the glass is subjected to external forces, the compressive stress layer can offset part of the tensile stress to prevent the glass from breaking, thereby achieving the purpose of improving the strength of the glass. Moreover, the microcracks on the glass surface become finer under this compressive stress, which also improves the strength of the glass to a certain extent.

[0003] After retrieval, the patent (application number: 202123078305.9) discloses "a convection heating structure of a glass tempering furnace and a glass tempering furnace". This device further conducts heat to the bottom of the glass through eight second branch pipes after passing through two first branch pipes, so that the heat will be evenly distributed at the bottom of the glass, and then the bottom of the glass can be evenly heated through the air outlet holes. At the same time, the reflector will gather and reflect the heat energy to reduce heat loss, thereby greatly improving the heating stability of the top and bottom of the glass and ensuring uniform heating of the top and bottom of the glass. The position of the support table and the conveying roller is driven by an electric hydraulic rod to adjust the distance between the glass on the conveying roller and the radiation pipe and the reflector, so as to facilitate controlling the radiation temperature of the top and bottom of the glass. However, there are some problems in the operation of this device:

[0004] First, the convection heating method adopted in this device is to blow air from top and bottom together. Although it can achieve a certain heating effect, the structure is cumbersome, the manufacturing cost is high, and the mechanical components work in a high-temperature environment for a long time, resulting in high maintenance costs.

[0005] In addition, when the glass directly enters a high-temperature environment of several hundred degrees Celsius from the outside for heating, there may be a risk of bursting, and it is also difficult for the glass to quickly rise to the required temperature. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a convection heating structure of a glass tempering furnace, which overcomes the deficiencies of the prior art and effectively solves the problems of high maintenance costs and the possible bursting risk of the glass.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A convective heating structure for a glass tempering furnace, comprising a convective heating box. At the center of the outer wall of the top of the convective heating box, an axial flow fan is fixedly connected. On both sides of the fan frame of the axial flow fan, convective heating air ducts are welded. An installation frame is fixedly connected to the inner wall of the top of the convective heating box, and electric heating tubes are installed on the inner wall of the installation frame;

[0009] On one outer wall of the convective heating box, a preheating box is provided. On the outer wall of the top of the preheating box, a blower connected to one side of the convective heating box is fixedly connected. The air outlet of the blower is fixedly connected to a tee, and preheating tubes are fixedly connected to the outer walls on both sides of the tee.

[0010] Preferably, air inlet pipes are welded to both outer walls of the convective heating box, and air inlets are provided on both inner walls of the convective heating box.

[0011] Preferably, roller frames are fixedly connected to both inner walls of the convective heating box. Between the two roller frames, ceramic rollers are installed at equal distances. The outer wall of the ceramic roller is slidably connected with tempered glass.

[0012] Preferably, a support frame is fixedly connected to the outer wall of the top of the roller frame, and symmetrically distributed heat dissipation fans are installed on the outer wall of the top of the support frame.

[0013] Preferably, a base is provided on the outer wall of the bottom of the convective heating box, and symmetrically distributed inclined rods are welded between the base and the roller frame.

[0014] Preferably, a PLC controller is installed on the outer wall of one side of one of the air inlet pipes, and the PLC controller is connected to the axial flow fan, the electric heating tubes, the blower, and the heat dissipation fans through signal lines.

[0015] Preferably, one ends of the two preheating tubes are respectively connected to the outer walls on both sides of the preheating box.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. For the convective heating structure of the glass tempering furnace designed in this way, the heat radiation generated by the electric heating tubes inside the installation frame can act on the tempered glass at the bottom. By using the axial flow fan to absorb heat energy upward, part of the heat energy can be inhaled into the fan sleeve and discharged to the bottom of the tempered glass along the electric heating tubes, realizing double-sided heating of the tempered glass. The structure is simple, the effect is good, and the installation cost and maintenance cost are reduced;

[0018] 2. For the convective heating structure of the glass tempering furnace designed in this way, the heat energy inside the convective heating box can be respectively transported to the upper layer and the lower layer of the preheating box along the two preheating tubes under the action of the blower, which has the function of preheating the tempered glass and avoids the problem of the tempered glass bursting. When the tempered glass moves into the convective heating box, it can quickly rise to the required temperature, and at the same time, the heat energy is reasonably utilized, improving the utilization rate of the heat energy. Description of the Drawings

[0019] Figure 1 The front view of the overall structure of a convection heating structure of a glass tempering furnace proposed by the present utility model;

[0020] Figure 2 The rear view of the overall structure of a convection heating structure of a glass tempering furnace proposed by the present utility model;

[0021] Figure 3 Schematic diagram of the connection structure of the convection heating box of a convection heating structure of a glass tempering furnace proposed by the present utility model Figure 1 ;

[0022] Figure 4 Schematic diagram of the connection structure of the convection heating box of a convection heating structure of a glass tempering furnace proposed by the present utility model Figure 2 。

[0023] In the figure: 1, convection heating box; 2, axial flow fan; 3, convection heating air duct; 4, mounting bracket; 5, electric heating tube; 6, preheating box; 7, blower; 8, tee; 9, preheating tube; 10, air inlet duct; 11, air inlet; 12, roller rack; 13, ceramic roller; 14, support frame; 15, heat dissipation fan; 16, base; 17, inclined rod; 18, PLC controller. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] Embodiment 1, referring to Figures 3 to 4 , a convection heating structure of a glass tempering furnace, including a convection heating box 1, a central portion of the outer wall of the top of the convection heating box 1 is fixedly connected with an axial flow fan 2, and both sides of the fan frame of the axial flow fan 2 are welded with convection heating air ducts 3. The inner wall of the top of the convection heating box 1 is fixedly connected with a mounting bracket 4, and an electric heating tube 5 is installed on the inner wall of the mounting bracket 4.

[0026] In this embodiment, the heat radiation generated by the electric heating tube 5 inside the mounting bracket 4 can act on the tempered glass at the bottom. By using the axial flow fan 2 to absorb heat energy upward, part of the heat energy can be sucked into the fan sleeve and discharged to the bottom of the tempered glass along the electric heating tube 5, realizing double-sided heating of the tempered glass. The structure is simple, the effect is good, and the installation cost and maintenance cost are reduced.

[0027] Embodiment 2, referring to Figure 1, a convective heating structure for a glass tempering furnace. A preheating box 6 is provided on one outer wall of the convective heating box 1, and a blower 7 connected to one side of the convective heating box 1 is fixedly connected to the top outer wall of the preheating box 6. The air outlet of the blower 7 is fixedly connected to a tee 8, and preheating pipes 9 are fixedly connected to both outer walls of the tee 8.

[0028] In this embodiment, the thermal energy inside the convective heating box 1 can be conveyed into the upper and lower layers of the preheating box 6 along the two preheating pipes 9 respectively under the action of the blower 7, which has the function of preheating the tempered glass, avoiding the problem of the tempered glass bursting. When the tempered glass moves into the convective heating box 1, it can quickly rise to the required temperature. At the same time, the thermal energy is rationally utilized, improving the utilization rate of thermal energy.

[0029] Refer to Figure 4 , air inlet pipes 10 are welded to both outer walls of the convective heating box 1, and air inlets 11 are opened on both inner walls of the convective heating box 1.

[0030] Refer to Figure 2 , roller racks 12 are fixedly connected to both inner walls of the convective heating box 1, and equally spaced ceramic rollers 13 are installed between the two roller racks 12. The outer wall of the ceramic roller 13 is slidably connected to the tempered glass.

[0031] Refer to Figure 2 , a support frame 14 is fixedly connected to the top outer wall of the roller rack 12, and symmetrically distributed heat dissipation blowers 15 are installed on the top outer wall of the support frame 14.

[0032] Refer to Figure 2 , a base 16 is provided on the bottom outer wall of the convective heating box 1, and symmetrically distributed inclined rods 17 are welded between the base 16 and the roller rack 12.

[0033] Refer to Figures 1 to 4 , a PLC controller 18 is installed on one outer wall of one of the air inlet pipes 10, and the PLC controller 18 is connected to the axial flow fan 2, the electric heating pipe 5, the blower 7 and the heat dissipation blower 15 through signal lines.

[0034] Refer to Figure 1 , one ends of the two preheating pipes 9 are respectively connected to the two outer walls of the preheating box 6.

[0035] Working principle: The tempered glass moves on the ceramic roller 13 and first moves into the preheating box 6. Under the action of the blower 7, the heat energy is respectively delivered to the upper and lower layers of the preheating box 6 along the two preheating pipes 9 to preheat the tempered glass. Then the tempered glass moves into the convection heating box 1. At this time, the heat radiation generated by the electric heating pipe 5 inside the mounting frame 4 can act on the bottom tempered glass. By using the axial flow fan 2 to absorb the heat energy upward, part of the heat energy can be sucked into the fan sleeve and discharged along the electric heating pipe 5 to the bottom of the tempered glass, and the convection heating is completed to realize the double-sided heating of the tempered glass at the same time.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A convective heating structure for a glass tempering furnace, comprising a convective heating box (1), characterized in that, At the center of the outer wall of the top of the convection heating box (1), an axial flow fan (2) is fixedly connected, and convection heating air ducts (3) are welded on both sides of the fan frame of the axial flow fan (2). An installation frame (4) is fixedly connected to the inner wall of the top of the convection heating box (1), and an electric heating pipe (5) is installed on the inner wall of the installation frame (4). A preheating box (6) is arranged on one outer wall of the convection heating box (1), and a blower (7) connected to one side of the convection heating box (1) is fixedly connected to the outer wall of the top of the preheating box (6). An air outlet of the blower (7) is fixedly connected to a tee (8), and preheating pipes (9) are fixedly connected to both outer walls of the tee (8).

2. The convective heating structure of a glass tempering furnace according to claim 1, characterized in that, Air inlet pipes (10) are welded on both outer walls of the convection heating box (1), and air inlets (11) are formed on both inner walls of the convection heating box (1).

3. A convective heating structure of a glass tempering furnace according to claim 1, characterized in that, Roller frames (12) are fixedly connected to both inner walls of the convection heating box (1), and equidistantly distributed ceramic rollers (13) are installed between the two roller frames (12). Tempered glass is slidably connected to the outer wall of the ceramic roller (13).

4. A convective heating structure of a glass tempering furnace according to claim 3, characterized in that, A support frame (14) is fixedly connected to the outer wall of the top of the roller frame (12), and symmetrically distributed heat dissipation fans (15) are installed on the outer wall of the top of the support frame (14).

5. The convection heating structure of a glass tempering furnace according to claim 1, wherein, A base (16) is arranged on the outer wall of the bottom of the convection heating box (1), and symmetrically distributed inclined rods (17) are welded between the base (16) and the roller frame (12).

6. The convective heating structure of a glass tempering furnace according to claim 2, characterized in that, A PLC controller (18) is installed on one outer wall of one of the air inlet pipes (10), and the PLC controller (18) is connected to the axial flow fan (2), the electric heating pipe (5), the blower (7), and the heat dissipation fan (15) through signal lines respectively.

7. A convective heating structure of a glass tempering furnace according to claim 1, characterized in that, One ends of the two preheating pipes (9) are respectively connected to both outer walls of the preheating box (6).

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