Heat insulation structure for glass tempering furnace

Abstract

The heat insulation structure is characterized in that an upper heat insulation cover is arranged on the inner wall of an upper furnace body, a lower heat insulation cover is arranged on the inner wall of a lower furnace body, and the parts, corresponding to the upper heat insulation cover and the lower heat insulation cover, of the two ends of a supporting roller are of different-diameter stepped shaft structures; the portion, corresponding to the supporting roller, of the upper heat shield is an upper stepped half hole matched with stepped shafts at the two ends of the supporting roller, the portion, corresponding to the supporting roller, of the lower heat shield is a lower stepped half hole matched with the stepped shafts at the two ends of the supporting roller, the upper stepped half hole and the lower stepped half hole are oppositely combined to form a stepped hole, and the stepped hole is in equal-clearance fit with the stepped shafts of the supporting roller in the radial direction. The side face of the stepped hole is in sealing fit with the axial side face of the stepped shaft of the supporting roller. The two ends of the supporting roller are of different-diameter stepped shaft structures, the stepped holes are in equal clearance fit with the stepped shaft portions of the supporting roller, the other portions are in direct contact sealing, axial heat loss is avoided, and meanwhile the shaft head of the supporting roller can be protected.

Description

Technical Field

[0001] This utility model belongs to the field of glass tempering furnace structure, and in particular relates to a heat insulation structure for glass tempering furnace. Background Technology

[0002] To strengthen glass, the commonly used physical tempering method involves heating the glass to near its softening point (around 650°C). At this temperature, the glass retains its original shape, but the particles within it begin to migrate, allowing for structural adjustment and rapid elimination of internal stress. This is followed by rapid cooling with air. Once the temperature reaches equilibrium, compressive stress is generated on the glass surface, and tensile stress is generated in the inner layers. This results in a uniformly and regularly distributed internal stress, thereby increasing the tensile strength of the glass as a brittle material and improving its bending and impact resistance. This softening process is typically carried out in a glass tempering furnace.

[0003] A glass tempering furnace consists of a heating furnace body and internal support rollers that hold the glass in place. The heating temperature inside the furnace is typically around 600℃ to 700℃. Therefore, to ensure safety, the furnace body needs an insulated wall to prevent excessively high external temperatures. However, for convenient glass loading and unloading, the furnace body is usually divided into an upper furnace body and a lower furnace body, separated by high-temperature resistant support rollers. During heating, these rollers are constantly rolling, leaving gaps between the upper and lower furnace bodies and the support rollers. These gaps allow for significant heat loss, especially near the furnace wall. If the glass is not placed correctly or if the glass in the heat loss zone is not properly treated, it can negatively impact the overall tempering process.

[0004] The support roller is located inside the furnace. To avoid deformation due to heat, it is usually made of high-temperature resistant material. However, the shaft of the support roller is located outside the furnace and also has to bear the function of transmission. It is usually made of steel. At this time, since the shaft is close to the gap between the upper and lower furnace bodies, it is easily affected by heat loss.

[0005] Therefore, some improvements need to be made to the current insulation structure of the heating furnace. Summary of the Invention

[0006] This invention solves the problem that gaps exist between the upper and lower furnace bodies and the support rollers in existing furnaces, which easily lead to heat loss and defects in glass tempering. It also affects the shaft ends of the external support rollers. The invention provides a heat insulation structure for glass tempering furnaces, in which the two ends of the support rollers adopt a stepped structure with different diameters, thereby forming a tortuous heat insulation and sealing structure in the axial direction. Even if there are gaps in the radial direction, axial heat loss can be avoided, and the shaft ends of the support rollers can also be protected.

[0007] The specific technical solution of this utility model is as follows: a heat insulation structure for a glass tempering furnace, including an upper furnace body and a lower furnace body, a support roller disposed on the lower furnace body between the upper and lower furnace bodies, an upper heat insulation cover disposed on the inner wall of the upper furnace body, a lower heat insulation cover disposed on the inner wall of the lower furnace body, and stepped shaft structures with different diameters at both ends of the support roller corresponding to the upper and lower heat insulation covers. The upper heat insulation cover corresponding to the support roller has an upper stepped half-hole adapted to the stepped shafts at both ends of the support roller, and the lower heat insulation cover corresponding to the support roller has a lower stepped half-hole adapted to the stepped shafts at both ends of the support roller. The upper and lower stepped half-holes are combined to form a stepped hole. The stepped hole and the stepped shaft of the support roller are radially equally clearance fitted, and the side of the stepped hole and the axial side of the stepped shaft of the support roller are sealed together.

[0008] The support roller adopts a stepped shaft structure with different diameters at both ends, indicating that the outer circumference of this part of the support roller has different diameters. Correspondingly matched upper and lower stepped half holes are set on the side parts of the upper and lower heat insulation covers. After the upper and lower furnace bodies are closed, the upper and lower stepped half holes are aligned to form a stepped hole. The stepped hole and the stepped shaft part of the support roller are in equal clearance fit, which facilitates the rotation of the support roller. Except for the stepped hole, the other parts are in static fit, which can directly contact and seal, thereby improving the sealing effect. At the same time, the side of the stepped hole is in sealing contact with the axial side of the stepped shaft of the support roller, thus forming a tortuous seal in the axial direction of the support roller. If there is a gap between the axial side of the support roller and the side of the stepped hole, this tortuous seal structure formed by the different diameters can also delay the axial heat dissipation and prevent axial heat loss, while also protecting the shaft head of the support roller.

[0009] Preferably, the opposite sides of the upper and lower heat insulation covers are straight edges. The straight edges of the upper heat insulation cover's side covers are spaced apart from the upper stepped half-hole, and the straight edges of the lower heat insulation cover's side covers are spaced apart from the lower stepped hole. The straight edges of the upper and lower heat insulation layers are in contact with each other and sealed. The upper and lower heat insulation covers' side covers are vertically opposite each other, and except for the support roller area, they are in contact with each other at other locations. Therefore, the design of facing straight edges improves the sealing effect.

[0010] Preferably, the front and rear edges of both the upper and lower heat insulation covers are straight edges, with the corresponding straight edges in close contact with each other. The front and rear edges are parallel to the axis of the support rollers, hence the straight-edge structure, ensuring a tight seal between the straight edges when the furnace is closed.

[0011] Preferably, the upper and lower heat insulation covers are fixed by stacking multiple layers of heat insulation panels, with the top heat insulation panels stacked vertically and the side heat insulation panels stacked horizontally. Heat insulation panels are mostly flat; this application uses multiple layers of heat insulation panels for fixing, reducing the need for cutting the heat insulation panels, facilitating design changes to the heat insulation layer, and simplifying maintenance and replacement of the heat insulation panels.

[0012] Preferably, the multi-layer insulation panels on the sides have different heights, with one side of each insulation panel aligned and the other side forming a corresponding upper or lower stepped half-hole. The thickness of each insulation panel is adapted to the axial dimension of the stepped shaft.

[0013] Preferably, the multi-layered insulation panels on the sides are of the same height, and are aligned and stacked together to form a single integral insulation panel on the side facing the support roller. The integral insulation panel has an upper or lower stepped half-hole on its side facing the support roller. The integral insulation panel is connected to the multi-layered insulation panels using a dovetail groove structure. Since the side insulation panels are of the same height and are fitted with a single integral insulation panel, the stepped holes are positioned within the integral insulation panel. If the gap at the support roller increases, only this single integral insulation panel needs to be replaced, rather than the entire insulation panel.

[0014] As a preferred option, multi-layer insulation panels use ceramic fiber insulation cotton.

[0015] Preferably, the upper furnace body includes a plate for fixing the upper heat insulation cover and a support beam fixed to the outside of the plate, wherein the top support beam is provided with lifting lugs; the lower furnace body includes a plate for fixing the lower heat insulation cover and a support beam fixed to the outside of the plate, wherein a suitable support beam is connected to a support leg below.

[0016] The beneficial effects of this utility model are as follows: The support roller adopts a stepped shaft structure with different diameters at both ends, indicating that the outer circumference of this part of the support roller has different diameters. The side parts of the upper heat insulation cover and the side parts of the lower heat insulation cover are provided with corresponding upper stepped half holes and lower stepped half holes. After the upper furnace body and the lower furnace body are closed, the upper stepped half holes and lower stepped half holes are matched to form a stepped hole. The stepped hole and the stepped shaft part of the support roller are in equal clearance fit, which facilitates the rotation of the support roller. Except for the stepped hole, the other parts are in static fit, which can directly contact and seal, thereby improving the sealing effect. At the same time, the side of the stepped hole and the axial side of the stepped shaft of the support roller are in sealing contact fit, thus forming a tortuous seal in the axial direction of the support roller. If there is a gap between the axial side of the support roller and the side of the stepped hole, this tortuous sealing structure formed by different diameters can also delay the axial heat dissipation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a utility model Figure 1 Enlarged view of point A;

[0019] Figure 3 This is a schematic diagram of a side cover of the furnace according to the present invention;

[0020] Figure 4 This is a structural schematic diagram of an integral heat insulation panel according to the present invention;

[0021] In the diagram: 1. Upper furnace body, 2. Lower furnace body, 3. Support beam, 4. Flat plate, 5. Upper heat insulation cover, 6. Lifting lug, 7. Support roller, 8. Stepped shaft, 9. Shaft head, 10. Support leg, 11. Lower heat insulation cover, 12. Side cover edge, 13. Heat insulation board, 14. Upper stepped half hole, 15. Lower stepped half hole, 16. Straight edge, 17. Integral heat insulation board, 18. Dovetail groove, 19. Dovetail tenon. Detailed Implementation

[0022] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings. Example

[0023] like Figure 1 As shown, a heat insulation structure for a glass tempering furnace includes an upper furnace body 1 and a lower furnace body 2, with a support roller 7 disposed on the lower furnace body between the upper and lower furnace bodies. The shaft end 9 of the support roller extends beyond the sides of the upper and lower furnace bodies. An upper heat insulation cover 5 is provided on the inner wall of the upper furnace body, and a lower heat insulation cover 11 is provided on the inner wall of the lower furnace body.

[0024] The upper furnace body includes a flat plate 4 for fixing the upper heat insulation cover and a support beam 3 fixed to the outside of the flat plate, wherein the top support beam is provided with lifting lugs 6. The lower furnace body includes a flat plate 4 for fixing the lower heat insulation cover and a support beam 3 fixed to the outside of the flat plate, wherein a suitable support beam is connected to a support leg 10 below. Brackets are provided on both sides of the lower furnace body, and bearings are provided on the shaft ends 9 at both ends of the support rollers, and the bearings are assembled on the brackets.

[0025] like Figure 2 Figure 3 As shown, the portions of the support roller corresponding to the upper and lower heat insulation covers are stepped shafts 8 of different diameters. The portion of the upper heat insulation cover corresponding to the support roller has an upper stepped half-hole 14 that matches the stepped shafts at both ends of the support roller, and the portion of the lower heat insulation cover corresponding to the support roller has a lower stepped half-hole 15 that matches the stepped shafts at both ends of the support roller. The upper and lower stepped half-holes together form a stepped hole, which is radially and equally clearance-fitted with the stepped shaft of the support roller. The side of the stepped hole and the axial side of the stepped shaft of the support roller are sealed together. The opposite portions of the side covers 12 of the upper heat insulation cover and the side covers 12 of the lower heat insulation cover are straight edges 16. The straight edges of the side covers of the upper heat insulation cover are spaced apart from the upper stepped half-holes, and the straight edges of the side covers of the lower heat insulation cover are spaced apart from the lower stepped hole. The straight edges of the upper heat insulation layer and the straight edges of the lower heat insulation layer are in contact with each other and sealed. The front and rear edges of the upper and lower heat insulation covers are both straight edges, and the corresponding straight edges of the upper and lower covers are in contact with each other and sealed.

[0026] The upper and lower heat insulation covers are fixed by stacking multiple layers of heat insulation boards 13, with the top heat insulation boards stacked vertically and the side heat insulation boards stacked horizontally. In this embodiment, there are 4 heat insulation boards at the top of the upper heat insulation cover and 4 heat insulation boards at the top of the lower heat insulation cover; there are 4 heat insulation boards on both sides of the upper heat insulation cover 12 and 4 heat insulation boards on both sides of the lower heat insulation cover. The stepped shaft at the end of the corresponding support roller has two small diameter sections and two large diameter sections. The 4 heat insulation boards on the side covers have different heights. One side of each heat insulation board is aligned, and the other side forms a corresponding upper or lower stepped half-hole. The sides of the 4 heat insulation boards respectively match the small diameter section and the large diameter section of the stepped shaft at the end of the support roller. The thickness of the 4 heat insulation boards matches the axial length of each step of the stepped shaft. In this embodiment, the 4 heat insulation boards are made of ceramic fiber insulation cotton. Example

[0027] like Figure 4 As shown, a heat insulation structure for a glass tempering furnace differs from Embodiment 1 in that the four heat insulation plates on the side cover are of the same height. These four heat insulation plates are aligned and stacked, and then joined and fixed to a single integral heat insulation plate 17 on the side facing the support roller. The integral heat insulation plate has an upper or lower stepped half-hole on the side facing the support roller. The integral heat insulation plate is connected to the multi-layered heat insulation plates using dovetail grooves. After the four heat insulation plates are stacked, dovetail grooves 18 are machined on the side. Dovetail tenons 19 are provided on the integral heat insulation plate, and the integral heat insulation plate is fitted together by the dovetail tenons and dovetail grooves. The remaining structure is the same as in Embodiment 1.

[0028] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A heat insulation structure for a glass toughening furnace, characterized by, The furnace body comprises an upper furnace body (1) and a lower furnace body (2), a supporting roller (7) is arranged on the lower furnace body between the upper furnace body and the lower furnace body, the inner wall of the upper furnace body is provided with an upper heat insulation cover (5), the inner wall of the lower furnace body is provided with a lower heat insulation cover (11), the parts corresponding to the upper heat insulation cover and the lower heat insulation cover at the two ends of the supporting roller are stepped shafts (8) with different diameters, the part corresponding to the supporting roller of the upper heat insulation cover is an upper stepped half-hole (14) matched with the stepped shafts at the two ends of the supporting roller, the part corresponding to the supporting roller of the lower heat insulation cover is a lower stepped half-hole (15) matched with the stepped shafts at the two ends of the supporting roller, the upper stepped half-hole and the lower stepped half-hole are matched to form a stepped hole, the stepped hole is matched with the stepped shaft of the supporting roller in the radial direction with equal clearances, and the side surface of the stepped hole is sealingly matched with the axial side surface of the stepped shaft of the supporting roller.

2. The heat insulation structure for a glass toughening furnace according to claim 1, characterized by The opposite parts of the side cover edges of the upper heat insulation cover and the lower heat insulation cover are straight edges (16), the straight edges of the side cover edges of the upper heat insulation cover are arranged at intervals from the upper stepped half-hole, the straight edges of the side cover edges of the lower heat insulation cover are arranged at intervals from the lower stepped hole, and the straight edges of the upper heat insulation layer and the straight edges of the lower heat insulation layer are in contact and sealed with each other.

3. The heat insulation structure for a glass tempering furnace according to claim 1 or 2, characterized in that, The front cover edges and the rear cover edges of the upper heat insulation cover and the lower heat insulation cover are straight edges, and the straight edges corresponding to each other are in contact and sealed with each other.

4. The heat insulation structure for a glass toughening furnace according to claim 1, characterized by The upper heat insulation cover and the lower heat insulation cover are fixed by a plurality of heat insulation plates (13) stacked in layers, wherein the heat insulation plates at the top are vertically stacked, and the heat insulation plates at the side edges are horizontally stacked.

5. The heat insulation structure for a glass toughening furnace according to claim 4, characterized by The heights of the heat insulation plates at the side edges are different, one side edge of each heat insulation plate is aligned, and the other side edge forms a corresponding upper stepped half-hole or lower stepped half-hole, and the thickness of each heat insulation plate is matched with the axial dimension of the stepped shaft.

6. The heat insulation structure for a glass toughening furnace according to claim 4, characterized by The heat insulation plates at the side edges have the same height, the heat insulation plates are aligned and stacked, and an integral heat insulation plate is fixed on the side edge facing the supporting roller, the integral heat insulation plate is provided with an upper stepped half-hole or a lower stepped half-hole on the side edge facing the supporting roller, and the integral heat insulation plate is connected with the plurality of stacked heat insulation plates by a dovetail groove structure.

7. The heat insulation structure for glass tempering furnace according to claim 4 or 5 or 6, characterized in that, The plurality of heat insulation plates are made of ceramic fiber insulation cotton.

8. The heat insulation structure for glass tempering furnace according to claim 1 or 4 or 5 or 6, characterized in that, The upper furnace body comprises a flat plate (4) for fixing the upper heat insulation cover and a supporting beam (3) fixed outside the flat plate, and a lifting lug (6) is arranged on the supporting beam at the top; the lower furnace body comprises a flat plate for fixing the lower heat insulation cover and a supporting beam fixed outside the flat plate, and a supporting leg (10) is connected below the supporting beam.

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