Annealing furnace heating device and glass forming equipment

Abstract

The utility model relates to the technical field of glass processing equipment, and discloses an annealing furnace heating device and glass forming equipment. At least one groove is formed in the side, away from the heat preservation layer, of the fireproof layer; the heating part is arranged in the groove of the refractory layer; and the cooling part is arranged in the heat preservation layer so as to adjust the heat dissipation efficiency of the heat preservation layer. According to the heating device of the annealing furnace, when the power of the heater in the annealing furnace is reduced to zero, if the temperature requirement of the glass in the interval cannot be met, the heat dissipation efficiency of the heat preservation layer can be adjusted through the cooling effect of the cooling part, so that the temperature requirement of the glass in the interval is met, and the service life of the glass is prolonged. The adjusting capacity of the heating device of the annealing furnace is wider, and glass meeting the quality requirement is produced, so that the device is suitable for production of glass of various types and specifications, the manufacturing cost of equipment can be reduced, and the universality of the furnace body is improved.

Description

Technical Field

[0001] The present application relates to the technical field of glass processing equipment, and in particular to an annealing furnace heating device and glass forming equipment. Background Art

[0002] In the overflow glass production process, the glass is always in a controlled cooling state in the forming area. When the glass is distributed in the longitudinal direction, there are strict temperature requirements in different areas. At the same time, when the temperature is distributed horizontally, the smaller the temperature difference of the glass in different areas, the better.

[0003] A flexible glass preparation system and method disclosed in a Chinese patent with publication number CN113480150A includes: a molding process using an overflow down-draw molding process to mold and anneal the glass liquid, the cooled glass liquid enters a muffle furnace of the molding process, overflow bricks are installed in the muffle furnace, the glass liquid overflows through both sides of the overflow bricks, and converges into one at the bottom of the overflow bricks, and ancillary equipment such as a drawing machine and a traction roller are installed on the molding furnace. The thickness and width of the plate are controlled by controlling the traction speed. At the same time, as the temperature decreases, the glass liquid also solidifies into a glass plate, and then the temperature of the glass plate is further reduced by an annealing furnace to obtain a finished flexible glass.

[0004] There are strict requirements for the temperature drop of glass when it passes through each section of the forming area. Only when the equipment can meet the temperature drop of the glass when it passes through this area can the glass quality meet the requirements.

[0005] However, once the glass flow rate or material recipe changes, for example, when the flow rate increases or the viscosity increases, the power of the annealing furnace heater needs to be reduced. But when the heater power is reduced to zero, it may still not be able to meet the temperature requirements of the glass in the interval. The corresponding equipment needs to have a wider adjustment capability to produce glass that meets quality requirements. Utility Model Content

[0006] In view of this, the present application provides an annealing furnace heating device and a glass forming device to solve the problem that when the heater power is reduced to zero, the temperature requirement of the glass in the interval section may still not be met.

[0007] In a first aspect, an embodiment of the present application provides an annealing furnace heating device, comprising:

[0008] Insulation layer;

[0009] The fire-resistant layer is stacked with the thermal insulation layer, and at least one groove is formed on the side of the fire-resistant layer away from the thermal insulation layer;

[0010] A heating portion is disposed in the groove of the refractory layer; and

[0011] The cooling part is arranged in the thermal insulation layer to adjust the heat dissipation efficiency of the thermal insulation layer.

[0012] In some embodiments, the cooling unit includes a cooling pipe, and a cooling medium is adapted to flow through the cooling pipe.

[0013] In some embodiments, the annealing furnace heating device further includes a flow regulating valve disposed on the cooling pipe, and the flow regulating valve is used to regulate the flow of the cooling medium.

[0014] In some embodiments, the cooling unit includes:

[0015] The main body section is parallel to the contact surface between the thermal insulation layer and the fire-resistant layer, and at least part of the main body section is in contact with the fire-resistant layer;

[0016] An extension section, one end of which is connected to the main section and the other end of which extends to the outside of the insulation layer;

[0017] Both ends of the main body section are respectively connected with extension sections.

[0018] In some embodiments, the annealing furnace heating device includes a cover plate disposed on the side of the thermal insulation layer away from the refractory layer; and a connecting rod passing through the refractory layer, the thermal insulation layer and the cover plate in sequence to fix the three.

[0019] In some embodiments, the cooling medium includes air or water.

[0020] In a second aspect, the present application also provides a glass forming device, comprising: an annealing furnace, wherein the annealing furnace has multiple groups of heating units spaced apart along the longitudinal direction, each group of heating units comprises at least one pair of heating components arranged along the transverse direction, and each pair of heating components comprises two annealing furnace heating devices as described above arranged oppositely.

[0021] In some embodiments, the cross-sectional area of ​​the cooling part of the plurality of annealing furnace heating devices arranged in sequence in the longitudinal direction downward gradually increases, and / or the flow rate of the cooling part gradually increases.

[0022] In some embodiments, a partition plate is disposed between two groups of heating units disposed adjacent to each other in the longitudinal direction;

[0023] A traction roller is arranged between each pair of heating assemblies.

[0024] In some embodiments, the glass forming equipment further includes: a shaping furnace, longitudinally arranged relatively above the annealing furnace; an overflow brick, longitudinally arranged relatively above the shaping furnace; and a thickness adjustment device, arranged between the overflow brick and the shaping furnace.

[0025] Through the above technical solution, the annealing furnace heating device provided by the present application has the following beneficial effects:

[0026] 1. The annealing furnace heating device provided in the embodiment of the present application, by arranging a cooling part in the insulation layer to adjust the heat dissipation efficiency of the insulation layer, so that when the heater power in the annealing furnace is reduced to zero, if it still cannot meet the temperature requirement of the glass in this interval, the heat dissipation efficiency of the insulation layer can be adjusted by the cooling effect of the cooling part, so as to meet the temperature requirement of the glass in this interval, so that the adjustment capability of the annealing furnace heating device is wider, and the production of glass that meets the quality requirements is guaranteed, so that it is suitable for the production of glass of various models and specifications, which can reduce the manufacturing cost of the equipment and improve the versatility of the furnace body.

[0027] 2. By setting a flow regulating valve on the cooling pipe, the flow rate of the cooling medium flowing into the cooling pipe can be changed by adjusting the opening of the flow regulating valve, thereby adjusting the furnace body's control over the temperature field and controlling the heat dissipation speed of the glass.

[0028] 3. Multiple groups of heating units distributed at intervals along the longitudinal direction can divide the longitudinal direction into multiple heating zones. Each heating zone needs to reach a preset heating temperature. Moreover, in the downward direction of the longitudinal direction, the next heating zone needs to have a certain temperature drop relative to the previous heating zone, thereby meeting the annealing requirements and ensuring the quality of the glass.

[0029] 4. By gradually increasing the cross-sectional area of ​​the cooling section, the cooling effect of the annealing furnace heating device can be sequentially increased along the longitudinal downward direction, thereby meeting the temperature drop requirements of the heating units at the lower layer, and greatly increasing the temperature adjustment capacity of the annealing furnace. Similarly, by gradually increasing the flow rate of the cooling section, the cooling effect of the annealing furnace heating device can be sequentially increased along the longitudinal downward direction, thereby meeting the temperature drop requirements of the heating units at the lower layer, and greatly increasing the temperature adjustment capacity of the annealing furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the glass forming equipment of the present application;

[0032] Figure 2 for Figure 1 A transverse schematic diagram of the annealing furnace shown in section AA;

[0033] Figure 3 This is a front view of a single annealing furnace heating device of the present application;

[0034] Figure 4A side view of a single annealing furnace heating device of this application;

[0035] Figure 5 This is a schematic diagram of the cooling unit of this application.

[0036] Description of reference numerals:

[0037] 1. Overflow brick; 2. Thickness adjustment device; 3. Gate; 4. Shaping furnace; 41. Edge drawing wheel; 42. Shaping furnace heating device; 5. Annealing furnace; 51. Pulling roller; 52. Annealing furnace heating device; 53. Spacer; 54. Annealing furnace body;

[0038] 521. Cover plate; 522. Insulation layer; 523. Connecting rod; 524. Refractory layer; 525. Heating section; 526. Cooling section; 5261. Extension section; 5262. Main section; 527. Wire pipe; 528. Flow regulating valve. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0040] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0041] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0042] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0043] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0044] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0045] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0046] Combine the following Figures 1 to 5 , describing an embodiment of the present application.

[0047] According to an embodiment of the present application, on the one hand, an annealing furnace heating device is provided, comprising:

[0048] Insulation layer 522;

[0049] The fire-resistant layer 524 is stacked with the thermal insulation layer 522, and at least one groove is formed on a side of the fire-resistant layer 524 away from the thermal insulation layer 522;

[0050] A heating portion 525 is disposed in the groove of the refractory layer 524; and

[0051] The cooling unit 526 is disposed in the thermal insulation layer 522 to adjust the heat dissipation efficiency of the thermal insulation layer 522 .

[0052] The annealing furnace heating device of this embodiment is arranged in the annealing furnace 5, combined with Figure 2 As shown, the annealing furnace 5 includes an annealing furnace body 54 and an annealing furnace heating device 52 arranged in the annealing furnace body 54. The glass is evenly distributed on the overflow bricks 1 in the forming area and flows through the middle area of ​​the annealing furnace 5. The annealing furnace heating devices 52 on both sides can heat the glass to maintain the temperature required for annealing.

[0053] In order to reduce the temperature dissipation in the annealing furnace 5, the annealing furnace heating device 52 is provided with an insulation layer 522. The insulation layer 522 can be arranged in contact with the annealing furnace body 54. A refractory layer 524 is stacked on the side of the insulation layer 522 away from the annealing furnace body 54. By installing a heating part 525 in the refractory layer 524, the glass flowing through the middle area of ​​the annealing furnace body 54 can be heated to maintain the temperature required for annealing.

[0054] When the glass passes through each functional zone in the longitudinal direction, it needs to maintain a relatively fixed temperature drop to ensure the quality of the glass. However, when the flow rate increases or the viscosity becomes larger, the power of the annealing furnace heater needs to be reduced. However, when the heater power is reduced to zero, it may still not meet the temperature requirements of the glass in this section. At this time, the higher temperature will affect the quality of the produced glass.

[0055] The annealing furnace heating device provided in the embodiment of the present application, by setting a cooling part 526 in the insulation layer 522 to adjust the heat dissipation efficiency of the insulation layer 522, so that when the heater power in the annealing furnace is reduced to zero, if it still cannot meet the temperature requirement of the glass in this interval, the heat dissipation efficiency of the insulation layer 522 can be adjusted by the cooling effect of the cooling part 526, so as to meet the temperature requirement of the glass in this interval, so that the adjustment capability of the annealing furnace heating device is wider, and the production of glass that meets the quality requirements is guaranteed, so that it is suitable for the production of glass of various models and specifications, which can reduce the manufacturing cost of the equipment and improve the versatility of the furnace body.

[0056] In some embodiments, the cooling portion 526 includes a cooling pipe, and a cooling medium is suitable for flowing through the cooling pipe.

[0057] In some embodiments, the cooling medium includes air or water or other cooling fluids.

[0058] In some embodiments, in combination Figure 3 As shown, the annealing furnace heating device also includes a flow regulating valve 528 disposed on the cooling pipe, and the flow regulating valve 528 is used to adjust the flow of the cooling medium.

[0059] By setting a flow regulating valve 528 on the cooling pipe, the flow rate of the cooling medium flowing into the cooling pipe can be changed by adjusting the opening of the flow regulating valve 528, thereby adjusting the furnace body's control over the temperature field and controlling the heat dissipation rate of the glass.

[0060] A temperature detection device is provided in the annealing furnace 5, and the opening degree of the flow regulating valve 528 can be determined by testing.

[0061] In some embodiments, in combination Figure 5 As shown, the cooling unit 526 includes:

[0062] The main body section 5262 is parallel to the contact surface between the thermal insulation layer 522 and the fire-resistant layer 524, and the main body section 5262 is at least partially in contact with the fire-resistant layer 524;

[0063] An extension section 5261, one end of which is connected to the main section 5262, and the other end of which extends to the outside of the insulation layer 522;

[0064] Both ends of the main section 5262 are connected to the extension sections 5261 respectively.

[0065] By at least partially fitting the main section 5262 to the refractory layer 524, the heat dissipation efficiency can be accelerated. When the glass flow rate increases or the viscosity becomes larger, the temperature in the annealing furnace 5 can respond quickly to obtain the temperature required for annealing, thereby ensuring the production of glass that meets quality requirements.

[0066] like Figure 5 As shown, the flow direction of the cooling medium in the cooling part 526 is shown in the figure, and the cooling effect can be adjusted by controlling the circuit opening of the flow control valve 528.

[0067] The structural form of the cooling part 526 can be U-shaped, Z-shaped, L-shaped, etc., by ensuring that the contact surface of the main section 5262, the insulation layer 522 and the refractory layer 524 is parallel, and the main section 5262 is at least partially in contact with the refractory layer 524, thereby ensuring that when the flow rate increases significantly or the viscosity changes significantly, the temperature in the annealing furnace 5 can respond quickly, thereby greatly increasing the temperature adjustment capacity of the annealing furnace 5.

[0068] In some embodiments, in combination Figure 3 As shown, the annealing furnace heating device 52 includes a cover plate 521, which is arranged on the side of the thermal insulation layer 522 away from the refractory layer 524; and a connecting rod 523, which passes through the refractory layer 524, the thermal insulation layer 522 and the cover plate 521 in sequence to fix the three.

[0069] The heating device of the annealing furnace is composed of a cover plate 521, a heat-insulating layer 522 and a refractory layer 524 from the outside to the inside. The cover plate 521, the heat-insulating layer 522 and the refractory layer 524 can be fixed to form a whole by setting a connecting rod 523 to avoid loosening. The cover plate 521 is connected and sealed with the annealing furnace body 54. The heat-insulating layer 522 can reduce the heat loss of the heating part 525 during normal operation. The refractory layer 524 can be a refractory brick. At least one groove is provided on the side of the refractory layer 524 away from the heat-insulating layer 522, and the heating part 525 can be clamped in the groove. The groove can be a C-shaped groove, so as to facilitate the heating part 525 to be installed in the refractory layer 524 and prevent the heating part 525 from falling out.

[0070] The heating portion 525 is a spiral heating tube, the central axis of the heating portion 525 is parallel to the extension direction of the groove, and the extension direction of the groove is parallel to the contact surface between the thermal insulation layer 522 and the fire-resistant layer 524 .

[0071] A plurality of grooves are formed on a side of the fire-resistant layer 524 facing away from the heat-insulating layer 522 . The plurality of grooves are arranged in parallel and at intervals, and a heating portion 525 is arranged in each groove.

[0072] The plurality of heating units 525 may be connected in series or in parallel. The annealing furnace heating device 52 further includes a wire tube 527 , in which a wire is passed for connecting the heating unit 525 to an external circuit.

[0073] According to an embodiment of the present application, on the other hand, a glass forming device is provided, comprising:

[0074] The annealing furnace 5 has a plurality of groups of heating units spaced apart in the longitudinal direction, each group of heating units includes at least one pair of heating components arranged in the transverse direction, and each pair of heating components includes two annealing furnace heating devices as described above arranged oppositely.

[0075] In some embodiments, in combination Figure 1 As shown, a partition plate 53 is provided between two groups of heating units arranged adjacent to each other in the longitudinal direction; Figure 2 As shown, each group of heating units includes a plurality of pairs of heating components arranged in a transverse direction, and each pair of heating components includes two annealing furnace heating devices 52 arranged opposite to each other.

[0076] Multiple groups of heating units distributed at intervals along the longitudinal direction can divide the longitudinal direction into multiple heating zones. Each heating zone needs to reach a preset heating temperature. Moreover, along the downward direction, the next heating zone needs to have a certain temperature drop relative to the previous heating zone, thereby meeting the annealing requirements and ensuring the quality of the glass.

[0077] In some embodiments, a pulling roller 51 is disposed between each pair of heating assemblies to pull the glass to move in the longitudinal direction.

[0078] In some embodiments, the cross-sectional area of ​​the cooling part 526 of the plurality of annealing furnace heating devices 52 arranged in sequence along the longitudinal direction downward gradually increases, and / or the flow rate of the cooling part 526 gradually increases.

[0079] By gradually increasing the cross-sectional area of ​​the cooling portion 526, the cooling effect of the annealing furnace heating device 52 can be sequentially increased along the longitudinal downward direction, thereby meeting the temperature drop requirements of the heating units at the lower layer, and greatly increasing the temperature adjustment capacity of the annealing furnace 5. Similarly, by gradually increasing the flow rate of the cooling portion 526, the cooling effect of the annealing furnace heating device 52 can also be sequentially increased along the longitudinal downward direction, thereby meeting the temperature drop requirements of the heating units at the lower layer, and greatly increasing the temperature adjustment capacity of the annealing furnace 5.

[0080] In some embodiments, in combination Figure 1 As shown, the glass forming equipment also includes: a shaping furnace 4, which is longitudinally arranged relatively above the annealing furnace 5; an overflow brick 1, which is longitudinally arranged relatively above the shaping furnace 4; and a thickness adjustment device 2, which is arranged between the overflow brick 1 and the shaping furnace 4.

[0081] The shaping furnace 4 comprises a drawing wheel 41 and a shaping furnace heating device 42 .

[0082] A gate 3 is also provided between the overflow brick 1 and the shaping furnace 4 to control the on-off between the overflow brick 1 and the shaping furnace 4 .

[0083] The glass liquid flows down through the two sides of the overflow brick 1 and gathers into one at the bottom of the overflow brick. The glass liquid evenly distributed from the overflow brick needs to maintain a relatively fixed temperature drop when passing through each functional area to ensure the quality of the glass.

[0084] In the annealing furnace 5, the temperature of each section of the annealing furnace 5 is comprehensively controlled by controlling the power opening of each heating part 525 and cooperating with the relatively independent heating zones formed by the pulling rollers 51 and the partition plates 53.

[0085] Each pair of heating components includes two annealing furnace heating devices 52 arranged opposite to each other, and the two annealing furnace heating devices 52 are horizontally symmetrically distributed in the furnace cavity of the annealing furnace 5. Each annealing furnace heating device 52 is independently controlled.

[0086] So far, the various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0087] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An annealing furnace heating device, characterized in that: include: Insulation layer (522); A fire-resistant layer (524) is stacked with the thermal insulation layer (522), and at least one groove is formed on a side of the fire-resistant layer (524) away from the thermal insulation layer (522); A heating portion (525) is disposed in the groove of the refractory layer (524); and A cooling unit (526) is disposed in the thermal insulation layer (522) to adjust the heat dissipation efficiency of the thermal insulation layer (522).

2. The annealing furnace heating device according to claim 1, characterized in that: The cooling part (526) comprises a cooling pipe, and a cooling medium is suitable for flowing through the cooling pipe.

3. The annealing furnace heating device according to claim 2, characterized in that: The annealing furnace heating device also includes a flow regulating valve (528) arranged on the cooling pipe, and the flow regulating valve (528) is used to adjust the flow of the cooling medium.

4. The annealing furnace heating device according to claim 1, characterized in that: The cooling unit (526) comprises: The main body section (5262) ​​is parallel to the contact surface between the thermal insulation layer (522) and the fire-resistant layer (524), and the main body section (5262) ​​is at least partially in contact with the fire-resistant layer (524); An extension section (5261), one end of which is connected to the main section (5262) ​​and the other end of which extends to the outside of the thermal insulation layer (522); Both ends of the main section (5262) ​​are respectively connected to the extension sections (5261).

5. The annealing furnace heating device according to any one of claims 1 to 4, characterized in that: The annealing furnace heating device comprises: a cover plate (521) arranged on a side of the thermal insulation layer (522) away from the refractory layer (524); and a connecting rod (523) passing through the refractory layer (524), the thermal insulation layer (522) and the cover plate (521) in sequence to fix the three.

6. The annealing furnace heating device according to claim 2, characterized in that: The cooling medium includes air or water.

7. A glass forming device, characterized in that: include: An annealing furnace (5), wherein the annealing furnace (5) has a plurality of groups of heating units spaced apart in a longitudinal direction, each group of the heating units comprises at least one pair of heating components arranged in a transverse direction, and each pair of the heating components comprises two annealing furnace heating devices as described in any one of claims 1 to 6 arranged opposite to each other.

8. The glass forming equipment according to claim 7, characterized in that: The cross-sectional area of ​​the cooling section (526) of the plurality of annealing furnace heating devices arranged in sequence longitudinally downward gradually increases, and / or the flow rate of the cooling section (526) gradually increases.

9. The glass forming equipment according to claim 7, characterized in that: A partition plate (53) is arranged between two groups of heating units arranged adjacent to each other in the longitudinal direction; A traction roller (51) is arranged between each pair of heating assemblies.

10. The glass forming equipment according to claim 7, characterized in that: The glass forming equipment further comprises: a shaping furnace (4) arranged longitudinally relatively above the annealing furnace (5); an overflow brick (1) arranged longitudinally relatively above the shaping furnace (4); and a thickness adjustment device (2) arranged between the overflow brick (1) and the shaping furnace (4).

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