Tunnel type heating device suitable for 3D curved glass
By designing a tunnel-type heating device, utilizing radiative heat transfer within the support tube and inert gas isolation, the problems of uneven heating and high energy consumption in traditional 3D curved glass heating devices are solved. This achieves uniform and stable glass heating, reduces costs, and improves the reliability of the device.
Patent Information
- Application Number
- CN202520447925.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Traditional 3D curved glass heating devices suffer from uneven glass heating, high energy consumption, complex structure, large temperature gradient, and mold oxidation, leading to glass warping, cracking, and increased costs.
A tunnel-type heating device is adopted, in which a support tube is nested inside the heating furnace. The mold is heated by radiation heat transfer. Combined with the feeding transition component and inert gas isolation, the mold is heated while being pushed in the support tube, which simplifies the structure and improves the heating uniformity.
It improves the uniformity and stability of glass heating, reduces energy consumption and cost, reduces the risk of glass warping and cracking, and enhances the reliability of the device.
Smart Images
Figure CN223950921U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heating device technical field, concretely relates to a tunnel type heating device suitable for 3D curved glass. BACKGROUND
[0002] 3D curved glass gradually becomes one of the high -end electronic product's standard materials because of its unique curved surface design and good touch experience. With the rapid development of smart mobile phones, tablet computers, wearable devices and other consumer electronic products, and the development of automobile intelligence and internet of things, the market demand of 3D curved glass is growing.
[0003] In the production of 3D curved glass, generally through the heat bending processing to 2D glass, to form 3D curved glass finished product. Before 3D curved glass forming, the glass needs to be preheated to soften. The traditional glass preheating scheme is contact heating, that is, the glass is placed in the mold box, and the upper and lower surfaces of the mold box are in contact with the heating plate to exchange heat, and the heat is transferred to the glass.
[0004] The traditional glass preheating scheme mainly has the following problems.
[0005] (1) the problem of uneven heating of glass. In the process of heating the mold box by the heating plate, the heat exchange of the corner with the inner cavity gas is stronger than that of the center, which will cause the center temperature of the heating plate to be higher than that of the corner, resulting in uneven heating of the mold box and the glass, which may cause problems such as glass explosion, warping, poor flatness, etc.
[0006] (2) high energy consumption and cost. In the traditional glass preheating scheme, the mold needs to be transported horizontally, so the upper and lower heating plates need to be equipped with vertical motion mechanisms, which will cause the entire heating space and the overall structure to have a large size, and the complexity of the structure increases. The large structure size will increase the heat loss and energy consumption, and the complex structure will increase the cost.
[0007] (3) the problem of too large temperature gradient. Glass is very sensitive to temperature change during heat bending, and if the temperature difference between the heat source and the glass is too large, it will also cause the glass to warp and even explode. In the traditional glass preheating scheme, several heating stations are included, each heating station heats the glass to a set temperature, and then transports it to the next station for higher temperature heating. Moreover, the temperature difference between the heating plates of adjacent heating stations is 50-80℃, which increases the risk of glass damage due to large temperature span.
[0008] (4) Mold oxidation problem. The 3D curved glass forming mold usually uses graphite as the material. If graphite mold is oxidized during heating process, its structure will be destroyed, the crystal structure of graphite will gradually collapse under the oxidation reaction, which will cause the size of the mold to change, and will reduce the mechanical properties of the graphite mold. Therefore, during the entire preheating process, the contact between air and graphite mold needs to be prevented. In the traditional mold heating scheme, the heating space is filled with nitrogen to prevent air from entering, but due to the large size of the heating space, the consumption of nitrogen is large, and the risk of mixing air is also high. Practical new content
[0009] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a tunnel type heating device suitable for 3D curved glass, which is compact in structure, convenient to use, high in stability and high in uniformity of heating.
[0010] In order to solve the above technical problems, the utility model adopts the technical scheme that:
[0011] A tunnel type heating device suitable for 3D curved glass, comprising: a support pipe, a heating furnace body and a feeding transition assembly; the heating furnace body is provided with an electric heater inside, the support pipe is embedded in the inside of the heating furnace body, and the inside of the support pipe is a heating channel for the mold to pass through; one end of the feeding transition assembly is sealingly connected with the feeding end of the heating furnace body, and the other end of the feeding transition assembly is connected with a mold pushing and feeding mechanism; when feeding is needed in the heating furnace body, the feeding transition assembly is opened, the mold pushing and feeding mechanism pushes the mold into the support pipe, and realizes the heating of the mold in the support pipe while pushing; when feeding is not needed in the heating furnace body, the feeding transition assembly is closed.
[0012] As a further improvement of the utility model, the heating furnace body comprises a framework and a heat preservation cavity, the heat preservation cavity is arranged on the inside of the framework, the electric heater is embedded in the heat preservation cavity, and a transverse cavity is arranged in the middle of the heat preservation cavity, the support pipe penetrates in the cavity of the heat preservation cavity, and a through groove is arranged between the cavity and the electric heater, the through groove is used for radiation heat transfer.
[0013] As a further improvement of the utility model, the two ends of the framework are respectively provided with a front end flange and a rear end flange, the front end flange is sealingly connected with a glass forming system, and the rear end flange is sealingly connected with the feeding transition assembly.
[0014] As a further improvement of the utility model, the electric heater comprises an electric heating wire and a connecting electrode, the two ends of the electric heating wire are respectively connected with a control power source through the connecting electrode; a plurality of electric heating wires with independent control heating power are arranged in the heat preservation cavity, so as to realize the heating channel with uniform temperature gradient formed in the inside of the heating furnace body.
[0015] As a further improvement of the utility model, the feeding transition assembly comprises a transition connecting flange, a gate and a lifting driving assembly; the transition connecting flange is provided with a feeding port for the mold to pass through, one end of the transition connecting flange is sealingly connected with the feeding end of the heating furnace body, and the other end of the transition connecting flange is sealingly connected with the mold pushing feeding assembly; the lifting driving assembly is arranged above the transition connecting flange, and the output end of the lifting driving assembly is connected with the gate; the lifting driving assembly is used for driving the gate to close or open the feeding port.
[0016] As a further improvement of the utility model, the lifting driving assembly comprises a connecting rod, a mounting bracket, an adapter and a driving element; the driving element is fixed on the top of the transition connecting flange through the mounting bracket, one end of the adapter is connected with the output end of the driving element, the other end of the adapter is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the gate; when the driving element drives the connecting rod to lift, the connecting rod drives the gate to lift, so as to realize the closing or opening of the feeding port.
[0017] As a further improvement of the utility model, the upper part of the transition connecting flange is provided with a gas conveying channel, and a plurality of injection holes are arranged between the gas conveying channel and the feeding port; when the feeding port is in the open state, the inert gas conveyed by the gas conveying channel is injected into the feeding port through the injection holes and forms an air curtain, so as to realize the air isolation between the inside and the outside of the heating furnace body.
[0018] As a further improvement of the utility model, the support pipe is in a "T" type structure, one end of the support pipe is flush with the end face of the rear end flange, and the other end of the support pipe abuts against the end part of the front end flange and the heat preservation cavity.
[0019] As a further improvement of the utility model, the end part of the support pipe and the end part of the front end flange are connected through a front end sealing element, and a sealing ring is arranged between the support pipe and the front end sealing element and between the support pipe and the front end flange.
[0020] As a further improvement of the utility model, the end part of the rear end flange is provided with a sunk platform and an inclined angle, a rear end sealing element is arranged between the sunk platform and the feeding transition assembly, and a sealing ring is arranged between the rear end sealing element and the inclined angle and the support pipe, so as to realize the axial sealing between the support pipe and the rear end flange and the feeding transition assembly.
[0021] Compared with the prior art, the utility model has the advantages that:
[0022] The utility model discloses a tunnel type heating device suitable for 3D curved surface glass, through setting up electric heater in heating furnace body, the support pipe is nested in the inside of heating furnace body, utilize support pipe as the heating channel that the mould passes, and the mould in the support pipe is heated through the mode of radiation heat of electric heater, and the heating uniformity of mould and glass product is improved, and it is favorable to the stability of glass product forming size and shape, and simultaneously, the two ends of feeding transition subassembly are connected the feeding end and push mould feeding mechanism of heating furnace body respectively, when needing feeding in heating furnace body, feeding transition subassembly opens, and push mould feeding mechanism can push the mould into the support pipe, and realizes the mould in the support pipe and pushes in and heats, need not set up vertical motion mechanism to push the mould and moves laterally in heating furnace body, and the overall structure of heating device is simplified, and the reliability is effectively increased and cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the three-dimensional structure principle schematic view of tunnel type heating device suitable for 3D curved surface glass in the utility model embodiment;
[0024] Figure 2 It is the main view structure principle schematic view of tunnel type heating device suitable for 3D curved surface glass in the utility model embodiment;
[0025] Figure 3 It is Figure 2 the section structure principle schematic view of A-A direction in it;
[0026] Figure 4 It is Figure 2 the section structure principle schematic view of B-B direction in it;
[0027] Figure 5 It is Figure 3 the structure principle schematic view of D place in it;
[0028] Figure 6 It is the section structure principle schematic view of tunnel type heating device suitable for 3D curved surface glass in the utility model embodiment;
[0029] Figure 7 It is Figure 6 the structure principle schematic view of E place in it;
[0030] Figure 8 It is Figure 6 the structure principle schematic view of F place in it;
[0031] Figure 9 It is the structure principle schematic view of tunnel type heating furnace in the utility model embodiment;
[0032] Figure 10The utility model discloses a tunnel type heating furnace dismantling protective shell after structure principle schematic view of specific embodiment.
[0033] Legend: 1, support pipe; 2, front end sealing element; 3, heating furnace body; 4, front end adjusting block; 5, feed transition assembly; 6, rear end adjusting block; 7, transition assembly adjusting block; 8, wiring aluminum head; 9, gas conveying passage; 10, injection hole; 11, sealing ring; 12, rear end sealing element; 31, heating wire; 32, through slot; 33, front end flange; 34, protective shell; 35, rear end flange; 36, connecting electrode; 37, framework; 38, heat preservation cavity; 51, transition connecting flange; 511, feed inlet; 52, gate; 53, connecting rod; 54, mounting frame; 55, adapter; 56, driving element; 100, mould. DETAILED DESCRIPTION
[0034] The utility model will be further described below in connection with the drawings and specific preferred embodiments, but it is not therefore to limit the protection scope of the utility model.
[0035] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0036] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, so that the features with "first" and "second" can explicitly or implicitly include one or more features, and in the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0037] EMBODIMENT
[0038] As Figures 1 to 10As shown, the tunnel heating device of this utility model, applicable to 3D curved glass, includes: a support tube 1, a heating furnace body 3, and a feeding transition assembly 5. An electric heater is installed inside the heating furnace body 3. The support tube 1 is horizontally inserted and nested inside the heating furnace body 3, and the interior of the support tube 1 is a heating channel through which the mold 100 passes. One end of the feeding transition assembly 5 is sealed to the feeding end of the heating furnace body 3, and the other end of the feeding transition assembly 5 is connected to a mold feeding mechanism (not shown in the figure). When feeding is required in the heating furnace body 3, the feeding transition assembly 5 opens, and the mold feeding mechanism pushes the mold 100 into the support tube 1, achieving simultaneous advancement and heating of the mold 100 within the support tube 1. The discharge end of the heating furnace body 3 is sealed to a glass forming system (not shown in the figure), and the preheated glass product is fed into the forming system for plastic shaping. When feeding is not required in the heating furnace body 3, the feeding transition assembly 5 closes to prevent external air from entering the heating furnace body 3.
[0039] In this embodiment, the support tube 1 is a transparent tube made of quartz material. The cross-sectional size of the quartz tube is only slightly larger than the outer size of the mold 100. The mold 100 can slide inside the quartz tube. The entire quartz tube serves as a heating space. The heat radiation from the electric heater can pass through the quartz tube to heat the mold 100. Compared with the traditional contact heating scheme, the heat exchange efficiency is greatly improved.
[0040] like Figure 1 As shown, in this embodiment, a front adjustment block 4 and a rear adjustment block 6 are respectively provided at both ends of the heating furnace body 3 to adjust the installation height at both ends of the heating furnace body 3 and ensure that the heating furnace body 3 remains horizontal. A transition component adjustment block 7 is provided at the bottom of the feeding transition component 5 to adjust the installation height of the feeding transition component 5 and ensure that the feeding transition component 5 remains horizontal with the heating furnace body 3, so as to realize the smooth advancement of the mold 100 in the support tube 1.
[0041] In this embodiment, an electric heater is installed inside the heating furnace body 3, and a support tube 1 is nested inside the heating furnace body 3. The support tube 1 serves as a heating channel through which the mold 100 passes. The electric heater heats the mold 100 inside the support tube 1 through radiative heat transfer, improving the heating uniformity of the mold 100 and the glass product, which is beneficial to the stability of the glass product's forming size and shape. At the same time, the two ends of the feeding transition component 5 are respectively connected to the feeding end of the heating furnace body 3 and the mold pushing feeding mechanism. When feeding is required in the heating furnace body 3, the feeding transition component 5 is opened, and the mold pushing feeding mechanism can push the mold 100 into the support tube 1, realizing that the mold 100 is pushed and heated in the support tube 1. There is no need to set up a vertical motion mechanism to push the mold 100 to move laterally in the heating furnace body 3, which simplifies the overall structure of the heating device, effectively increases reliability and reduces costs.
[0042] like Figure 9 and Figure 10As shown, the heating furnace body 3 comprises a framework 37 and a heat preservation cavity 38, the heat preservation cavity 38 is arranged inside the framework 37, the electric heater is embedded in the heat preservation cavity 38, and a transverse cavity is arranged in the middle of the heat preservation cavity 38, the support pipe 1 transversely penetrates in the cavity of the heat preservation cavity 38, and a through slot 32 is arranged between the cavity and the electric heater, which is used for radiation heat transfer.
[0043] In this embodiment, the heat preservation cavity 38 is composed of a low-thermal-conductivity heat preservation material, and a protective shell 34 is arranged outside the heat preservation cavity 38, which effectively isolates the heat exchange between the heat preservation cavity 38 and the external air, greatly reduces the heat loss, and effectively reduces the energy consumption.
[0044] As shown in Figure 10 , the framework 37 is respectively provided with a front flange 33 and a rear flange 35 at both ends, the front flange 33 is sealingly connected with the glass forming system, and the rear flange 35 is sealingly connected with the feeding transition assembly 5. The front flange 33 and the rear flange 35 are both provided with openings with shapes similar to the cross section of the cavity of the heat preservation cavity 38, so as to facilitate the mold 100 to enter and exit the support pipe 1.
[0045] As shown in Figure 6 and Figure 9 , the electric heater comprises an electric heating wire 31 and a connecting electrode 36, and both ends of the electric heating wire 31 are connected with the control power source through the connecting electrode 36. As shown in Figure 2 , an aluminum wire head 8 is arranged on the connecting electrode 36 to improve the convenience of wiring. A plurality of electric heating wires 31 with independent control heating power are arranged in the heat preservation cavity 38, the heating power of the electric heating wires 31 is controlled by segmentation, so as to control the temperature in the heat preservation cavity 38 to be distributed by gradient from low to high from the inlet to the outlet, to form a heating channel with uniform temperature gradient, the temperature change is more linear compared with the traditional scheme, and the risk of glass damage due to temperature change is greatly reduced.
[0046] As shown in Figure 3 and Figure 5 , the feeding transition assembly 5 comprises a transition connecting flange 51, a gate 52 and a lifting driving assembly. The transition connecting flange 51 is provided with a feeding port 511 for the mold 100 to pass through, one end of the transition connecting flange 51 is sealingly connected with the rear flange 35 of the heating furnace body 3, and the other end of the transition connecting flange 51 is sealingly connected with the mold pushing feeding assembly. The lifting driving assembly is arranged above the transition connecting flange 51, and the output end of the lifting driving assembly is connected with the gate 52; when feeding is needed, the lifting driving assembly lifts the gate 52, and the feeding port 511 is opened; when feeding is not needed, the lifting driving assembly lowers the gate 52, and the feeding port 511 is closed.
[0047] As shown in Figure 3 and Figure 5As shown, the lifting driving assembly includes a connecting rod 53, a mounting bracket 54, an adapter 55 and a driving element 56. The driving element 56 is fixed on the top of the transition flange 51 through the mounting bracket 54, one end of the adapter 55 is connected with the output end of the driving element 56, the other end of the adapter 55 is connected with one end of the connecting rod 53, and the other end of the connecting rod 53 is connected with the gate 52. When the driving element 56 drives the connecting rod 53 to rise, the connecting rod 53 drives the gate 52 to rise to realize the opening of the feeding port 511, and when the driving element 56 drives the connecting rod 53 to descend, the connecting rod 53 drives the gate 52 to descend to realize the closing of the feeding port 511. As shown in the figure, Figure 5 As shown, the transition flange 51 is provided with a sealing ring 11 between the mounting bracket 54 and the push mold feeding assembly to ensure that the heating furnace body 3 is in a better sealed state. The driving element 56 can be in the form of a pneumatic cylinder or an oil cylinder or an electric push rod as long as it can drive the gate to rise and fall stably.
[0048] As shown in the figure, Figure 4 As shown, the upper part of the transition flange 51 is provided with a gas conveying channel 9, and a plurality of injection holes 10 are arranged between the gas conveying channel 9 and the feeding port 511. In the preheating process of the glass product, the heating space inside the entire heating furnace body 3 is under positive pressure, and when the feeding port 511 is in an open state, the inert gas (such as nitrogen) conveyed by the gas conveying channel 9 is continuously injected to the feeding port 511 through the injection holes 10 and forms an air curtain to realize the isolation of the inside of the heating furnace body 3 from the outside air. Only the inert gas is injected to form an air curtain at the feeding port 511, which can prevent the outside air from entering the inside of the heating furnace body 3, thereby reducing the consumption of nitrogen and the risk of air mixing into the inside of the heating furnace body 3.
[0049] As shown in the figure, Figure 6 As shown, the support pipe 1 is in a "T" type structure. Specifically, the height and width directions of the support pipe 1 are in a "T" type structure. The main body of the support pipe 1 is nested in the cavity of the heat preservation cavity 38, one end of the support pipe 1 is flush with the end face of the rear end flange 35, and the other end of the support pipe 1 abuts against the end part of the front end flange 33 and the heat preservation cavity 38.
[0050] As shown in the figure, Figure 7 As shown in the figure, in this embodiment, the length of the end part of the support pipe 1 is slightly greater than the length of the end part of the front end flange 33, the end part of the support pipe 1 is connected with the front end flange 33 through the front end sealing element 2, and the sealing ring 11 is arranged between the support pipe 1 and the front end sealing element 2 and between the support pipe 1 and the front end flange 33.
[0051] As shown in the figure, Figure 8As shown, the end of the rear flange 35 is provided with a sink 351 and an inclined angle 352, the sink 351 is provided with a rear end sealing element 12 between the feed transition assembly 5, and the inclined angle 352 is provided with a sealing ring 11 between the support pipe 1, so as to realize the axial sealing between the support pipe 1 and the rear flange 35 and the feed transition assembly 5.
[0052] In the embodiment, the front flange 33 and the support pipe 1 are in a high temperature environment, the sealing ring 11 of the high temperature end is far away from the electric heating wire 31, and the sealing ring 11 can be effectively prevented from being damaged due to high temperature. Through the extrusion of the front sealing element 2 and the rear sealing element 12 and the setting of the external sealing ring 11 on the front flange 33 and the rear flange 35, the internal passage of the support pipe 1 and the internal passage of the transition connecting flange 51 form a space isolated from air. Further, the front flange 33 and the rear flange 35 are both internally provided with cooling flow channels, and the cooling medium enters and exits the front flange 33 and the rear flange 35 through the cooling flow channels, so as to reduce the temperature of the front flange 33 and the rear flange 35 and prevent the sealing ring 11 from being damaged by high temperature.
[0053] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not only limited to the above-mentioned embodiments, and any technical scheme belonging to the utility model idea belongs to the protection scope of the utility model. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principle of the utility model, these improvements and decorations should also be regarded as the protection scope of the utility model.
Claims
1. A tunnel heating device suitable for 3D curved glass, characterized in that, The utility model relates to a kind of heating furnace body and feeding transition assembly for glass mould, including: Support pipe (1), heating furnace body (3) and feeding transition assembly (5);Electric heater is provided in the heating furnace body (3), the support pipe (1) is nested in the heating furnace body (3) inside, and the inside of the support pipe (1) is the heating channel for mould (100) to pass through;Feeding transition assembly (5) one end is sealingly connected with the feeding end of heating furnace body (3), and the other end of feeding transition assembly (5) is connected with push mould feeding mechanism;When the heating furnace body (3) needs to feed, the feeding transition assembly (5) opens, and push mould feeding mechanism pushes mould (100) into support pipe (1), and realizes that mould (100) is pushed in and heated in support pipe (1) side by side.
2. The tunnel heating device suitable for 3D curved glass according to claim 1, characterized in that, The heating furnace body (3) includes framework (37) and heat preservation cavity (38), the heat preservation cavity (38) is arranged inside the framework (37), the electric heater is embedded in the heat preservation cavity (38), and the middle part of the heat preservation cavity (38) is provided with a transverse cavity, the support pipe (1) is penetrated in the cavity of the heat preservation cavity (38), and the transverse cavity is provided with a through slot (32) between the electric heater, and the through slot (32) is used for radiation heat transfer.
3. The tunnel heating device suitable for 3D curved glass according to claim 2, characterized in that, The framework (37) is respectively provided with front end flange (33) and rear end flange (35) at both ends, the front end flange (33) is sealingly connected with glass forming system, and the rear end flange (35) is sealingly connected with feeding transition assembly (5).
4. The tunnel heating device suitable for 3D curved glass according to claim 2, characterized in that, The electric heater includes heating wire (31) and connecting electrode (36), and the both ends of the heating wire (31) are respectively connected with control power supply through the connecting electrode (36);The heat preservation cavity (38) is provided with multiple sections of heating wire (31) that independently control heating power, to realize that the heating channel inside heating furnace body (3) forms uniform temperature gradient.
5. The tunnel heating device suitable for 3D curved glass according to any one of claims 1 to 4, characterized in that, The feeding transition assembly (5) includes: transition connection flange (51), gate (52) and lifting drive assembly;The transition connection flange (51) is provided with feeding port (511) for mould (100) to pass through, one end of the transition connection flange (51) is sealingly connected with the feeding end of heating furnace body (3), and the other end of the transition connection flange (51) is sealingly connected with push mould feeding assembly;Lifting drive assembly is arranged above the transition connection flange (51), and the output end of lifting drive assembly is connected with gate (52), and the lifting drive assembly is used to drive gate (52) to close or open feeding port (511).
6. The tunnel heating device suitable for 3D curved glass according to claim 5, characterized in that, The lifting driving assembly comprises a connecting rod (53), a mounting frame (54), an adapter (55) and a driving element (56); the driving element (56) is fixed on the top of the transition connecting flange (51) through the mounting frame (54), one end of the adapter (55) is connected with the output end of the driving element (56), the other end of the adapter (55) is connected with one end of the connecting rod (53), and the other end of the connecting rod (53) is connected with the gate (52); when the driving element (56) drives the connecting rod (53) to lift, the connecting rod (53) drives the gate (52) to lift, so that the feeding port (511) is closed or opened.
7. The tunnel heating device suitable for 3D curved glass according to claim 5, characterized in that, The upper part of the transition connecting flange (51) is provided with a gas conveying channel (9), and a plurality of injection holes (10) are arranged between the gas conveying channel (9) and the feeding port (511); when the feeding port (511) is in an open state, the inert gas conveyed by the gas conveying channel (9) is injected to the feeding port (511) through the injection holes (10) and forms an air curtain, so that the inside of the heating furnace body (3) is isolated from the outside air.
8. The tunnel heating device suitable for 3D curved glass according to claim 3, characterized in that, The support pipe (1) is in a "T" type structure, one end of the support pipe (1) is flush with the end face of the rear end flange (35), and the other end of the support pipe (1) abuts against the end of the front end flange (33) and the heat preservation cavity (38).
9. The tunnel heating device suitable for 3D curved glass according to claim 8, characterized in that, The end of the support pipe (1) and the end of the front end flange (33) are connected through the front end sealing element (2), and sealing rings (11) are arranged between the support pipe (1) and the front end sealing element (2) and between the support pipe (1) and the front end flange (33).
10. The tunnel heating device suitable for 3D curved glass according to claim 8, characterized in that, The end of the rear end flange (35) is provided with a sunken platform (351) and an inclined angle (352), a rear end sealing element (12) is arranged between the sunken platform (351) and the feeding transition assembly (5), and sealing rings (11) are arranged between the rear end sealing element (12), the inclined angle (352) and the support pipe (1), so as to realize the axial sealing between the support pipe (1) and the rear end flange (35) and the feeding transition assembly (5).