Cache heating device and glass rolling production line

Abstract

The invention discloses a buffer heating device and a glass rolling production line, and relates to the technical field of glass manufacturing. The buffer heating device comprises a hopper and a heating piece. The hopper is provided with a discharging nozzle, the discharging nozzle comprises a first flow dividing section, a second flow dividing section and a third flow dividing section, the first flow dividing section, the second flow dividing section and the third flow dividing section are sequentially arranged in the extending direction of the discharging nozzle, the width of the first flow dividing section and the width of the third flow dividing section are larger than the width of the second flow dividing section, and the heating piece is arranged outside the discharging nozzle in a surrounding mode. And the heating piece is used for heating the discharging nozzle so as to ensure that the temperature of the glass melt flowing out of the discharging nozzle is uniform. According to the buffer heating device provided by the invention, the temperature difference in the length direction of the glass melt can be eliminated, the uniformity of the heating process and the consistency of the feeding temperature are improved, and the forming quality of glass products is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and in particular to a buffer heating device and a glass rolling production line. Background Art

[0002] At present, in glass rolling production lines with vertical height differences, the platinum hopper is a buffer device between the glass flow channel and the rolling mechanism. When the incoming material from the flow channel enters the platinum hopper at a certain height difference, a certain level of glass melt accumulates inside the platinum hopper. Under the simultaneous work of gravity and pulling force, it flows out through the discharge gap at the bottom of the platinum hopper and is fed to the rolling mechanism.

[0003] However, there is heat loss when the glass melt flows through the platinum hopper, especially when the platinum hopper is irregular in shape, there are differences in heat preservation and heat dissipation in various parts of the platinum hopper, and the resistance of the rigid wall inside the platinum hopper to the glass melt causes uneven flow rate. The combined influence of the two leads to uneven temperature of the glass melt after discharge, affecting the molding quality. At present, the heat loss of the glass melt is compensated by directly heating the outer wall of the platinum hopper, but during the heating process, due to the inconsistent shape of the outer wall, it is difficult to ensure the uniformity of the heating temperature, which affects the molding quality of the glass. Summary of the invention

[0004] The applicant has found that after the glass melt is discharged from the bottom of the platinum funnel, the temperature of both sides of the glass melt in the length direction perpendicular to the flow direction of the glass melt is lower than the temperature in the middle, and there is a temperature difference in the length direction of the glass melt. Only by eliminating the temperature difference in the length direction of the glass melt can the quality of glass product molding be effectively improved.

[0005] The object of the present invention is to provide a buffer heating device and a glass rolling production line, which can improve the uniformity of the glass melt temperature after the platinum hopper is discharged and the consistency of the feed temperature, so as to ensure the molding quality of the glass products.

[0006] The present invention is achieved by adopting the following technical solutions.

[0007] A buffer heating device comprises a hopper and a heating element. The hopper is provided with a discharge nozzle. The discharge nozzle comprises a first diversion section, a second diversion section and a third diversion section. The first diversion section, the second diversion section and the third diversion section are arranged in sequence along the extension direction of the discharge nozzle. The width of the first diversion section and the width of the third diversion section are greater than the width of the second diversion section. The heating element is arranged outside the discharge nozzle. The heating element is used to heat the discharge nozzle to ensure that the temperature of the glass melt flowing out of the discharge nozzle is uniform.

[0008] Optionally, the width of the first diversion section is equal to the width of the third diversion section.

[0009] Optionally, the width of the second flow diversion section is 60% to 90% of the width of the first flow diversion section.

[0010] Optionally, the discharge nozzle includes two long side walls and two short side walls, wherein one long side wall, one short side wall, another long side wall and another short side wall are connected end to end, and the heating element includes a first heating element and a second heating element, the first heating element is provided outside the two long side walls, and the second heating element is provided outside the two short side walls.

[0011] Optionally, the first heating elements and the second heating elements are in multiple groups, each group of first heating elements is arranged in parallel, each group of second heating elements is arranged in parallel, and multiple groups of first heating elements and multiple groups of second heating elements are continuously arranged along the circumference of the discharge nozzle.

[0012] Optionally, the number of first heating elements in each group is two, and the two first heating elements in each group are relatively arranged outside the two long side walls; the number of second heating elements in each group is two, and the two second heating elements in each group are relatively arranged outside the two short side walls.

[0013] Optionally, the first heating element includes a first heating substrate and a first heating wire, the first heating wire is wound outside the first heating substrate, and the first heating wire is used to heat the first heating substrate.

[0014] Optionally, a first receiving groove is opened on the surface of the first heating substrate, the first heating wire is arranged in the first receiving groove, and the first receiving groove is sealed and filled with wet mud to shield and protect the first heating wire.

[0015] Optionally, the depth of the first accommodating groove ranges from 3 mm to 7 mm, the width of the first accommodating groove ranges from 5 mm to 10 mm, and the diameter of the first heating wire ranges from 3 mm to 6 mm.

[0016] Optionally, the second heating element includes a second heating substrate and a second heating wire, the second heating wire is wound outside the second heating substrate, the second heating wire is used to heat the second heating substrate, and the rated power of the second heating wire is lower than the rated power of the first heating wire.

[0017] Optionally, a first gap is formed between the first heating substrate and the long side wall, and the range of the first gap is 10 mm to 20 mm; a second gap is formed between the second heating substrate and the short side wall, and the range of the second gap is 5 mm to 20 mm.

[0018] Optionally, the depth of the second accommodating groove ranges from 3 mm to 7 mm, the width of the second accommodating groove ranges from 5 mm to 10 mm, and the diameter of the second heating wire ranges from 2 mm to 5 mm.

[0019] Optionally, the heating element further includes a first filling layer and a second filling layer, the first heating element is spaced apart from the long side wall, the second heating element is spaced apart from the short side wall, the first filling layer is arranged between the first heating element and the long side wall, and the second filling layer is arranged between the second heating element and the short side wall.

[0020] Optionally, the first filling layer and the second filling layer are both made of wet mud, the wet mud includes aluminum oxide, zirconium dioxide, deionized water and sodium silicate, and the mass ratios of aluminum oxide, zirconium dioxide, deionized water and sodium silicate are 33-50%, 10-16%, 0-10% and 16-33% respectively.

[0021] Optionally, the cache heating device also includes a connecting row, which is connected to the hopper and is used to connect to a heat source to transfer heat to the hopper.

[0022] A glass rolling production line comprises the above-mentioned buffer heating device.

[0023] The buffer heating device and glass rolling production line provided by the present invention have the following beneficial effects:

[0024] It can eliminate the temperature difference of the glass melt in the length direction after it is discharged, improve the uniformity of the heating process and the consistency of the feeding temperature, and ensure the molding quality of the glass products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic structural diagram of a cache heating device provided by an embodiment of the present invention from a first perspective;

[0027] Figure 2 A schematic structural diagram of a cache heating device provided by an embodiment of the present invention from a second viewing angle;

[0028] Figure 3 A schematic structural diagram of a cache heating device provided by an embodiment of the present invention from a third viewing angle;

[0029] Figure 4 A schematic diagram of the structure of the connection between the heating element and the discharge nozzle in the cache heating device provided in an embodiment of the present invention;

[0030] Figure 5 for Figure 4 A schematic structural diagram of the first heating element;

[0031] Figure 6 for Figure 4 Schematic diagram of the structure of the second heating element.

[0032] Icons: 100- cache heating device; 110- hopper; 111- discharge nozzle; 1111- first diversion section; 1112- second diversion section; 1113- third diversion section; 112- long side wall; 113- short side wall; 114- discharge gap; 115- left section; 116- middle section; 117- right section; 120- connecting row; 130- heating element; 131- first heating element; 1311- first heating substrate; 1312- first electric heating wire; 1313- first containing groove; 132- second heating element; 1321- second heating substrate; 1322- second electric heating wire; 1323- second containing groove; 133- first filling layer; 134- second filling layer. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does 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 limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0039] The embodiment of the present invention provides a glass rolling production line (not shown) for producing glass products. It can eliminate the temperature difference in the length direction of the glass melt, improve the uniformity of the heating process and the consistency of the feeding temperature, and ensure the molding quality of the glass products. The glass products include glass and microcrystalline glass.

[0040] It should be noted that the glass rolling production line includes a glass melt flow channel (not shown), a buffer heating device 100 and a rolling mechanism (not shown). The glass melt flow channel, the buffer heating device 100 and the rolling mechanism are arranged in sequence according to the flow direction of the glass melt. The glass melt flow channel is used to feed the glass melt into the buffer heating device 100. The buffer heating device 100 is used to buffer and heat the glass melt so that the glass melt with uniform temperature flows into the rolling mechanism, thereby realizing the feeding function of the rolling mechanism. The rolling mechanism is used to roll and shape the glass melt to obtain a glass product.

[0041] See also Figure 1 The buffer heating device 100 includes a hopper 110 and a heater 130. The hopper 110 is used to contain the glass melt flowing out of the glass melt flow channel and buffer it. A discharge nozzle 111 is provided on the side of the hopper 110 close to the calendering mechanism, and the discharge nozzle 111 is a frame-shaped structure formed at the bottom of the hopper 110. The hopper 110 is located above the calendering mechanism so that the glass melt buffered in the hopper 110 can flow downward to the calendering mechanism through the discharge nozzle 111 under the action of gravity. The heater 130 is arranged outside the discharge nozzle 111, and the heater 130 is used to heat the discharge nozzle 111.

[0042] See also Figure 2 , Figure 3In this embodiment, the discharge nozzle 111 includes two long side walls 112 and two short side walls 113. The length direction of the glass melt is the direction perpendicular to the flow direction of the glass melt in the hopper 110. The long side wall 112 is arranged parallel to the extension direction of the discharge nozzle 111 (i.e., the length direction of the glass melt), and the short side wall 113 is arranged perpendicular to the extension direction of the discharge nozzle 111. One long side wall 112, one short side wall 113, another long side wall 112 and another short side wall 113 are connected end to end, and the two long side walls 112 and the two short side walls 113 together form a discharge gap 114, which is used for the glass melt in the hopper 110 to flow out.

[0043] Specifically, since the discharge nozzle 111 is configured as a "narrow in the middle and wide on both sides" structure along its extension direction, that is, the discharge gap 114 is in a "narrow in the middle and wide on both sides" shape in the extension direction of the discharge nozzle 111, the spacing between the two long side walls 112 first decreases and then increases from one end to the other end of the discharge nozzle 111. In one embodiment, in order to ensure the smoothness of the outflow of the molten glass and reduce the resistance to the molten glass, the long side walls 112 can be designed as a smooth arch, and the two long side walls 112 are arranged oppositely, and the spacing between the two long side walls 112 is smaller in the middle and larger at both ends.

[0044] In one embodiment, in combination Figure 3 , Figure 4The discharge nozzle 111 includes a first diversion section 1111, a second diversion section 1112 and a third diversion section 1113. The first diversion section 1111, the second diversion section 1112 and the third diversion section 1113 are sequentially arranged along the extension direction of the discharge nozzle 111. The width of the first diversion section 1111 is equal to the width of the third diversion section 1113 and is greater than the width of the second diversion section 1112, so that the discharge nozzle 111 presents a "narrow in the middle and wide on both sides" structure along its extension direction. Such a structure can divert the glass melt, increase the discharge amount of the two sides (the first diversion section 1111 and the third diversion section 1113) of the discharge nozzle 111, thereby improving the situation that the glass melt temperature at the side is low and the viscous resistance is large, thereby eliminating the temperature difference in the length direction when the glass melt is discharged, and to a certain extent enhances the ability of the mouth seam of the discharge nozzle 111 to resist high temperature creep and glass melt scouring deformation. As an adaptive adjustment, the width of the first diverter section 1111 and the width of the third diverter section 1113 can be appropriately unequal, for example, due to processing errors or erosion, but only need to be smaller than the width of the second diverter section 1112, that is, the amount of glass melt discharged from the edge can be improved to a certain extent, thereby improving the temperature difference. Alternatively, it can also be aimed at the situation where the temperature distribution of the two sides of the edge is different, through inconsistent width settings, such as the overall temperature of the first diverter section 1111 is slightly higher than the overall temperature of the third diverter section 1113, the discharge flow of the first diverter section 1111 can be correspondingly increased by increasing the width of the first diverter section 1111, thereby improving the defect of the temperature distribution difference of the two sides of the edge.

[0045] It should be noted that, in some embodiments, the length of the first diversion section 1111 is the same as the length of the third diversion section 1113 and is smaller than the length of the second diversion section 1112. Uniform partitioning can ensure that there will be no difference in the temperature distribution on both sides of the length direction of the glass melt. In other embodiments, the length of the first diversion section 1111 and the length of the third diversion section 1113 can be appropriately different. However, the greater the difference in length, the less conducive it is to improving the aforementioned temperature difference problem when the temperature distribution of the first diversion section 1111 and the third diversion section 1113 is uniform. The length range of the first diverter section 1111 is 20% or less of the total length of the discharge nozzle 111 but is not 0, for example, 5% to 10%, 5% to 15%, 5% to 20%, 10% to 15%, or 10% to 20%; the length range of the third diverter section 1113 is 20% or less of the total length of the discharge nozzle 111 but is not 0, for example, 5% to 10%, 5% to 15%, 5% to 20%, 10% to 15%, or 10% to 20%; the length range of the second diverter section 1112 is 60% or more of the total length of the discharge nozzle 111, for example, 60% to 70%, 70% to 80%, or 80% to 90%.

[0046] Furthermore, in the length direction of the discharge nozzle 111, the discharge nozzle 111 is in a shape that first narrows and then widens, that is, the width of the first diverter section 1111 and the width of the third diverter section 1113 are both greater than the width of the second diverter section 1112. It can be seen that in the length direction of the discharge nozzle 111, the first diverter section 1111 shows a continuous narrowing trend toward the second diverter section 1112, and the width is the smallest at the second diverter section 1112; in the length direction of the discharge nozzle 111, the third diverter section 1113 shows a continuous narrowing trend toward the second diverter section 1112, and the width is the smallest at the second diverter section 1112. Specifically, the width at the narrowest point of the second diverter section 1112 is 60%-90% of the width at the widest point of the first diverter section 1111 and all ranges and sub-ranges therebetween, for example, 65% to 70%, 65% to 75%, 65% to 80%, 65% to 85%, 65% to 90%, 75% to 85%, 75% to 90%, or 80% to 90%.

[0047] It is worth noting that the conventional method of directly heating the outer wall of the hopper 110 to improve the heat loss problem of the glass melt flowing through the hopper 110 is difficult to control the heating temperature uniformity of the hopper 110 along its width direction (the extension direction of the discharge nozzle 111) during the heating process. In particular, for the irregularly shaped hopper 110, the glass melt in the hopper 110 also has a lower temperature and greater viscous resistance due to the heat dissipation effect and the resistance effect of the mouth seam at the edge of the discharge nozzle 111, which in turn causes the discharge amount at the edge of the discharge nozzle 111 to be lower than the discharge amount in the middle, and finally generates a temperature difference. If the glass melt flows into the rolling mechanism according to this temperature distribution, it will cause quality defects of the glass products and affect the yield rate. Therefore, in the present invention, the discharge nozzle 111 is set to a "narrow in the middle and wide on both sides" structure along its extension direction, and the cross section of the second diversion section 1112 has a throttling effect on the outflow of the glass melt, so that the flow rate of the glass melt flowing out of the middle of the discharge nozzle 111 is limited, and the glass melt limited at the second diversion section 1112 will flow out from the wider first diversion section 1111 and the third diversion section 1113 under the action of the static pressure of the glass melt in the hopper 110, increasing the flow rate of the glass melt flowing out of both sides of the discharge nozzle 111 and increasing the temperature of the glass melt at the edge. Therefore, the temperature difference in the length direction of the discharge nozzle 111 is eliminated to a certain extent, the molding quality of the glass product is improved, and the ability of the mouth seam of the discharge nozzle 111 to resist high-temperature creep and erosion deformation of the glass melt is enhanced to a certain extent. On this basis, the discharge nozzle 111 is heated by a heating element 130 disposed outside the discharge nozzle 111, thereby further achieving temperature compensation for the molten glass, ensuring that the temperature of the molten glass flowing out of the discharge nozzle 111 is uniform, eliminating the temperature difference in the length direction of the molten glass, and thereby improving the molding quality of the glass products.

[0048] Furthermore, in one embodiment, without directly heating the outer wall of the hopper 110, in order to ensure that the degree of heat loss is not lower than the rolling temperature requirement, the glass melt can be heated in the glass melt flow channel so that the glass melt has a sufficient temperature to compensate for the heat loss in the hopper 110. Alternatively, the heating power of the heater 130, the length of the discharge nozzle 111, and the size of the heating area of ​​the heater 130 can also be adjusted to ensure the temperature of the glass melt.

[0049] See also Figure 2 , Figure 3 In one embodiment, in order to further control the heat loss of the glass melt so that the temperature is lower than the rolling temperature and rolling cannot be achieved, the heating device 100 further includes a connecting row 120, which is connected to the hopper 110. The connecting row 120 is used to connect to a heat source (not shown) to transfer heat to the hopper 110, thereby achieving the heating function of the hopper 110, so that the glass melt buffered in the hopper 110 is maintained at a certain temperature.

[0050] Furthermore, the connecting bar 120 is provided with a mounting hole, and the mounting hole is used to connect with a heat source. When the heat source is energized, the heat is conducted to the connecting bar 120 to transfer the hopper 110 for electrical heating, so as to increase the temperature of the hopper 110. In one embodiment, there are two connecting bars 120, and the two connecting bars 120 are arranged on both sides of the hopper 110 opposite to each other. The connecting bars 120 are made of copper or other metals. The two connecting bars 120 work together to heat the hopper 110 under the action of the heat source at the same time, thereby heating the glass melt in the hopper 110, and improving the temperature rise efficiency and temperature rise effect of the glass melt.

[0051] In the present embodiment, the heating element 130 is arranged around the discharge nozzle 111, that is, the heating element 130 is arranged in a complete circle around the discharge nozzle 111 to heat the four sides of the discharge nozzle 111 at the same time, thereby ensuring that each position of the discharge nozzle 111 can be heated quickly and effectively, improving the temperature compensation efficiency of the glass melt, and ensuring that the temperature of the glass melt flowing out of the discharge nozzle 111 is uniform.

[0052] See also Figure 4The heating element 130 includes a first heating element 131 and a second heating element 132. The first heating element 131 is disposed outside the two long side walls 112, and is used to heat the long side walls 112, so that the heat emitted by the first heating element 131 is transferred to the glass melt through the long side walls 112. The second heating element 132 is disposed outside the two short side walls 113, and is used to heat the short side walls 113, so that the heat emitted by the second heating element 132 is transferred to the glass melt through the short side walls 113. Furthermore, there is an installation gap between the adjacent first heating elements 131 and the second heating elements 132, and the installation gap is sealed and filled with wet mud. The wet mud is synchronously heated when the hopper 110 is heated until it is sintered and hardened, which is used to buffer and protect the expansion between the first heating element 131 and the second heating element 132, and ensure that the first heating element 131 and the second heating element 132 are jointly arranged outside the discharge nozzle 111 without a gap, thereby improving the heating effect.

[0053] It should be noted that, in one embodiment, both the first heating element 131 and the second heating element 132 are multiple groups, the circuit of each group of the first heating element 131 is arranged in parallel, and the circuit of each group of the second heating element 132 is arranged in parallel, and the multiple groups of first heating elements 131 and the multiple groups of second heating elements 132 are continuously arranged along the circumference of the discharge nozzle, that is, the multiple groups of first heating elements 131 and the multiple groups of second heating elements 132 are arranged in a full circle around the discharge nozzle 111 to heat the four sides of the discharge nozzle 111 at the same time, ensuring that all positions of the discharge nozzle 111 can be heated quickly and effectively, and the heating power of the first heating element 131 and the second heating element 132 can be adjusted to respectively adjust the heating temperature of the long side wall and the short side, thereby improving the temperature compensation effect on the glass melt and ensuring that the temperature of the glass melt flowing out of the discharge nozzle 111 is uniform.

[0054] Specifically, the number of each group of first heating elements 131 is two, and the two first heating elements 131 in each group are relatively arranged outside the two long side walls 112, and at least one group of first heating elements 131 works together to heat the two long side walls 112 at the same time, thereby realizing the synchronous temperature increase function of the glass melt between the two long side walls 112. The number of each group of second heating elements 132 is two, and the two second heating elements 132 in each group are relatively arranged outside the two short side walls 113, and at least one group of second heating elements 132 works together to heat the two short side walls 113 at the same time, thereby realizing the temperature increase function of the glass melt between the two short side walls 113.

[0055] Continue to see Figure 4In this embodiment, there are three groups of first heating elements 131, and the three groups of first heating elements 131 are arranged side by side. There is no installation gap between two adjacent first heating elements 131, and there is no need to fill wet mud. This is because the expansion coefficient of the first heating element 131 is small, and no buffer protection for temperature increase expansion is required. In addition, the temperature loss of the long side wall 112 is greater, and the heating effect without an installation gap is better. The discharge gap 114 is divided into three sections along the extension direction of the long side wall 112, namely the left section 115, the middle section 116 and the right section 117, wherein the left section 115 is arranged in the first diversion section 1111, the middle section 116 is arranged in the second diversion section 1112, and the right section 117 is arranged in the third diversion section 1113. The two first heating elements 131 in the first group are relatively arranged outside the left section 115, and the first heating elements 131 in the first group are used to heat the glass melt in the left section 115. The two first heating elements 131 in the second group are relatively arranged outside the middle section 116, and the second group of first heating elements 131 are used to heat the glass melt in the middle section 116. The two first heating elements 131 in the third group are relatively arranged outside the right section 117, and the third group of first heating elements 131 are used to heat the glass melt in the right section 117. However, this is not limited to this. In other embodiments, the first heating elements 131 can be four groups, in which case the discharge gap 114 is divided into four sections along the extension direction of the long side wall 112; the first heating elements 131 can also be one group, in which case the heating temperature of different areas corresponding to each first heating element 131 and the long side wall 112 can be adjusted; the number of groups of the first heating elements 131 is not specifically limited.

[0056] The discharge nozzle 111 adjusts the flow rate of the glass melt, which can improve the temperature difference problem of the glass melt to a great extent. However, the temperature difference problem has not been fundamentally solved and there is still room for improvement. Since the glass melt still has a certain temperature difference in its length direction, it is necessary to perform different degrees of temperature compensation on the glass melt in the length direction of the glass melt, that is, adjust the power of the three groups of first heating elements 131 according to actual conditions, so that the heating temperatures of the three groups of first heating elements 131 are different. Under the cooperation of the discharge nozzle 111 and the heating element 130, the temperature of the glass melt flowing out of the discharge nozzle 111 is guaranteed to be uniform, thereby minimizing the possibility of rolling quality defects.

[0057] Specifically, in the process of the glass melt flowing out of the discharge gap 114 of the discharge nozzle 111, it is generally manifested that the temperature of the glass melt flowing out of the left section 115 and the temperature of the glass melt flowing out of the right section 117 are both lower than the temperature of the glass melt flowing out of the middle section 116, resulting in a certain difference in the temperature of the glass melt along its length direction. In this regard, in this embodiment, the power of the first group of heating elements 130 and the third group of heating elements 130 is increased, and the power of the second group of heating elements 130 is decreased, so that the temperature compensation of the glass melt in the left section 115 by the first group of heating elements 130 and the temperature compensation of the glass melt in the right section 117 by the third group of heating elements 130 are greater than the temperature compensation of the glass melt in the middle section 116 by the second group of heating elements 130. In this way, the temperature of the glass melt in the left section 115, the temperature of the glass melt in the middle section 116 and the temperature of the glass melt in the right section 117 after temperature rise remain the same, so as to eliminate the temperature difference in the length direction of the glass melt, ensure that the temperature of the glass melt flowing out of the discharge gap 114 is uniform, improve the uniformity of the heating process and the consistency of the supply temperature, thereby improving the molding quality of the glass products.

[0058] See also Figure 5 In one embodiment, the first heating element 131 includes a first heating substrate 1311 and a first heating wire 1312. The first heating wire 1312 is wound around the first heating substrate 1311, and the first heating wire 1312 is used to heat the first heating substrate 1311. The first heating substrate 1311 is used to transfer heat to the long side wall 112, so as to heat the glass melt in the discharge gap 114.

[0059] It should be noted that a first receiving groove 1313 is provided on the surface of the first heating substrate 1311, and the first heating wire 1312 is disposed in the first receiving groove 1313, and the first receiving groove 1313 is used to accommodate and limit the first heating wire 1312. Specifically, the first receiving groove 1313 is sealed and filled with wet mud to shield and protect the first heating wire 1312 and prevent the first heating wire 1312 from being exposed.

[0060] In this embodiment, the number of the first receiving grooves 1313 and the first heating wires 1312 are both multiple, the first receiving grooves 1313 are arranged horizontally around the first heating substrate 1311, and the multiple first receiving grooves 1313 are arranged in parallel and spaced apart, each first heating wire 1312 is arranged in a first receiving groove 1313 and is arranged around a circle, and the length of the first heating wire 1312 is the same as the length of the first receiving groove 1313.

[0061] Further, the first heating substrate 1311 can be made of sintered corundum brick. The first heating substrate 1311 is a plate structure, so that it can be used as a bearing substrate to perform surface grooving for the first heating wire 1312 to be wound. The refractoriness of the first heating substrate 1311 is above 1300 degrees Celsius, and it has good thermal shock stability and a low expansion coefficient. The thickness of the first heating substrate 1311 ranges from 20 mm to 50 mm, for example, 20 mm to 30 mm, 30 mm to 40 mm, or 40 mm to 50 mm. The depth of the first receiving groove 1313 ranges from 3 mm to 7 mm, for example, 3 mm to 4 mm, 4 mm to 5 mm, or 5 mm to 7 mm. The width of the first receiving groove 1313 ranges from 5 mm to 10 mm, for example, 5 mm to 7 mm, 7 mm to 9 mm, or 9 mm to 10 mm. The diameter of the first heating wire 1312 is in the range of 3 mm to 6 mm, for example, 3 mm to 4 mm, 4 mm to 5 mm, or 5 mm to 6 mm. The first heating wire 1312 is made of platinum material, and the power of the first heating wire 1312 is in the range of 1 kW to 5 kW, for example, 1 kW to 2 kW, 2 kW to 3 kW, or 3 kW to 5 kW. The hopper 110 is made of platinum material, which has good thermal conductivity and ductility.

[0062] In this embodiment, the second heating elements 132 form a group, in which two second heating elements 132 are relatively arranged outside the two short side walls 113 to assist in heating the glass melt at both ends of the length direction of the discharge gap 114, further improving the temperature compensation of the glass melt in the left section 115 and the right section 117, thereby increasing the temperature rise rate of the glass melt in the left section 115 and the right section 117, allowing them to quickly heat up to the same temperature as the glass melt in the middle section 116.

[0063] See also Figure 6 The second heating element 132 includes a second heating substrate 1321 and a second heating wire 1322. The second heating wire 1322 is wound outside the second heating substrate 1321, and the second heating wire 1322 is used to heat the second heating substrate 1321, and the second heating substrate 1321 is used to transfer heat to the short side wall 113, so as to assist in heating the glass melt in the discharge gap 114.

[0064] In this embodiment, a second receiving groove 1323 is provided on the surface of the second heating substrate 1321, and the second heating wire 1322 is disposed in the second receiving groove 1323. The second receiving groove 1323 is used to accommodate and limit the second heating wire 1322. Specifically, the second receiving groove 1323 is sealed and filled with wet mud to shield and protect the second heating wire 1322 and prevent the second heating wire 1322 from being exposed.

[0065] In this embodiment, the number of the second receiving grooves 1323 and the second heating wires 1322 are both multiple, and the second receiving grooves 1323 are arranged horizontally around the second heating base 1321. The multiple second receiving grooves 1323 are arranged in parallel and spaced apart. Each second heating wire 1322 is arranged in a second receiving groove 1323 and is arranged around a circle. The length of the second heating wire 1322 is the same as the length of the second receiving groove 1323.

[0066] Further, the second heating substrate 1321 can be made of sintered corundum brick, and the second heating substrate 1321 is a plate structure, so that it can be used as a bearing substrate to perform surface grooving for the second heating wire 1322 to be wound, and the refractoriness of the second heating substrate 1321 is above 1300 degrees Celsius, and it has good thermal shock stability and a low expansion coefficient. The thickness of the second heating substrate 1321 ranges from 20 mm to 60 mm, for example, 20 mm to 30 mm, 30 mm to 40 mm, or 40 mm to 60 mm. The depth of the second receiving groove 1323 ranges from 3 mm to 7 mm, for example, 3 mm to 4 mm, 4 mm to 5 mm, or 5 mm to 7 mm. The width of the second receiving groove 1323 ranges from 5 mm to 10 mm, for example, 5 mm to 6 mm, 6 mm to 7 mm, or 7 mm to 10 mm. The diameter of the second heating wire 1322 ranges from 2 mm to 5 mm, for example, from 2 mm to 3 mm, from 3 mm to 4 mm, or from 4 mm to 5 mm. The second heating substrate 1321 is made of sintered corundum brick material, the second heating wire 1322 is made of platinum material, the rated power of the second heating wire 1322 is lower than the rated power of the first heating wire 1312, and the power of the second heating wire 1322 ranges from 1 kW to 3 kW, for example, from 1 kW to 2 kW, or from 2 kW to 3 kW.

[0067] Specifically, since the length of the long side wall 112 is greater than the length of the short side wall 113, the glass melt flow area corresponding to the long side wall 112 is greater than the glass melt flow area corresponding to the short side wall 113, that is, the glass melt flow rate heated by the first heating element 131 is greater than the glass melt flow rate heated by the second heating element 132, and the glass melt heat loss corresponding to the long side wall 112 is greater than the glass melt heat loss of the short side wall 113. Therefore, the rated power of the first heating wire 1312 is greater than the rated power of the second heating wire 1322, the first heating element 131 is used as the main heating element, and the second heating element 132 is used as the auxiliary heating element. In this way, by distinguishing the main and auxiliary heating elements, the glass melt flowing through different positions in the discharge nozzle 111 is subjected to different degrees of temperature compensation, so as to eliminate the temperature difference in the length direction of the glass melt, and ensure that the temperature of the glass melt flowing out of the discharge nozzle 111 is uniform.

[0068] It is worth noting that a first gap is formed between the first heating substrate 1311 and the long side wall 112, and the range of the first gap is 10 mm to 20 mm, such as 10 mm to 14 mm, 14 mm to 16 mm, or 16 mm to 20 mm; a second gap is formed between the second heating substrate 1321 and the short side wall 113, and the range of the second gap is 5 mm to 20 mm, such as 5 mm to 10 mm, 10 mm to 15 mm, or 15 mm to 20 mm. Specifically, since the installation position of the second heating substrate 1321 outside the short side wall 113 is limited, and since the heating power of the second heating wire 1322 is limited, and the heating area of ​​the mouth seam of the short side wall 113 is relatively small, it is necessary to set the second heating substrate 1321 closer to the short side wall 113, that is, the second gap is smaller than the first gap, so as to improve the heating effect.

[0069] It should be noted that the heating element 130 further includes a first filling layer 133 and a second filling layer 134. The first heating element 131 is spaced apart from the long side wall 112, and the first filling layer 133 is disposed between the first heating element 131 and the long side wall 112, that is, the first filling layer 133 is disposed in the first gap, and the first filling layer 133 is used to play a buffering and protective role between the hopper 110 and the first heating element 131 when the hopper 110 is heated and expanded, and is also used to protect the internal long side wall 112 after high-temperature sintering and curing and having a certain sintering strength. The second heating element 132 is spaced apart from the short side wall 113, and the second filling layer 134 is arranged between the second heating element 132 and the short side wall 113, that is, the second filling layer 134 is arranged in the second gap, and the second filling layer 134 is used to play a buffering and protective role between the hopper 110 and the second heating element 132 when the hopper 110 heats up and expands, and is also used to protect the internal short side wall 113 after high-temperature sintering and curing and having a certain sintering strength.

[0070] In one embodiment, the number of the first filling layer 133 and the number of the second filling layer 134 are both two, the two first filling layers 133 are relatively arranged outside the two long side walls 112, the two second filling layers 134 are relatively arranged outside the two short side walls 113, and one first filling layer 133, one second filling layer 134, another first filling layer 133 and another second filling layer 134 together form a rectangular frame.

[0071] Further, the first gap ranges from 10 mm to 20 mm, that is, the thickness of the first filling layer 133 ranges from 10 mm to 20 mm; the second gap ranges from 5 mm to 20 mm, that is, the thickness of the second filling layer 134 ranges from 5 mm to 20 mm. The first filling layer 133 and the second filling layer 134 are both made of wet mud, which is a mixture of aluminum oxide, zirconium dioxide, deionized water and sodium silicate, and the mass ratios of aluminum oxide, zirconium dioxide, deionized water and sodium silicate are 33-50%, 10-16%, 0-10% and 16-33% respectively, wherein the particle size of aluminum oxide ramming material and zirconium dioxide powder ranges from 0.4 mm to 2 mm, and the purity of aluminum oxide, zirconium dioxide, deionized water and sodium silicate is greater than or equal to 98%.

[0072] Specifically, in the process of filling the first filling layer 133 and the second filling layer 134, the first heating element 131 and the second heating element 132 are firstly arranged and placed outside the discharge nozzle 111, connected and fixed by a steel structure, and corresponding gaps are reserved; then various raw materials are fully homogenized through a stirring mechanism to obtain wet mud, and the wet mud is poured into the gap between the first heating element 131 and the second heating element 132 and the discharge nozzle 111 and compacted; thereafter, the heat source heats the hopper 110 through the connecting row 120, and at the same time heats and heats the filled wet mud; when the temperature of the wet mud reaches above 1000 degrees Celsius (the heating time needs to be determined according to the heating of the hopper 110 to the actual production temperature and the heating rate), the wet mud is sintered and hardened, and has a certain strength, so as to obtain the first filling layer 133 and the second filling layer 134.

[0073] The cache heating device 100 provided in the embodiment of the present invention has a hopper 110 provided with a discharge nozzle 111, and the discharge nozzle 111 includes a first diversion section 1111, a second diversion section 1112 and a third diversion section 1113, the first diversion section 1111, the second diversion section 1112 and the third diversion section 1113 are arranged in sequence along the extension direction of the discharge nozzle 111, the width of the first diversion section 1111 is equal to the width of the third diversion section 1113, and is larger than the width of the second diversion section 1112, and the heating element 130 is arranged outside the discharge nozzle 111, and the heating element 130 is used to heat the discharge nozzle 111 to ensure that the temperature of the glass melt flowing out of the discharge nozzle 111 is uniform. Compared with the prior art, the buffer heating device 100 provided by the present invention adopts the first diverter section 1111, the second diverter section 1112 and the third diverter section 1113 of different widths and the heating element 130 disposed outside the discharge nozzle 111, so it can eliminate the temperature difference in the length direction of the glass melt, improve the uniformity of the heating process and the consistency of the feeding temperature, and ensure the molding quality of the glass product. On this basis, the heating element 130 disposed outside the discharge nozzle 111 is used to heat the discharge nozzle 111, so as to further achieve temperature compensation of the glass melt, ensure that the temperature of the glass melt flowing out of the discharge nozzle 111 is uniform, eliminate the temperature difference in the length direction of the glass melt, and thus improve the molding quality of the glass product.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cache heating device, characterized in that: It includes a hopper and a heating element. The hopper is provided with a discharge nozzle. The discharge nozzle includes a first diversion section, a second diversion section and a third diversion section. The first diversion section, the second diversion section and the third diversion section are arranged in sequence along the extension direction of the discharge nozzle. The width of the first diversion section and the width of the third diversion section are greater than the width of the second diversion section. The heating element is arranged outside the discharge nozzle. The heating element is used to heat the discharge nozzle to ensure that the temperature of the glass melt flowing out of the discharge nozzle is uniform.

2. The cache heating device according to claim 1, characterized in that: The width of the second flow dividing section is 60% to 90% of the width of the first flow dividing section.

3. The cache heating device according to claim 1, characterized in that: The width of the first flow diversion section is equal to the width of the third flow diversion section.

4. The cache heating device according to claim 1, characterized in that: The discharge nozzle includes two long side walls and two short side walls, wherein one of the long side walls, one of the short side walls, another of the long side walls and another of the short side walls are connected end to end, and the heating element includes a first heating element and a second heating element, the first heating element is disposed outside the two long side walls, and the second heating element is disposed outside the two short side walls.

5. The cache heating device according to claim 4, characterized in that: The first heating elements and the second heating elements are both in multiple groups, each group of the first heating elements is arranged in parallel, each group of the second heating elements is arranged in parallel, and multiple groups of the first heating elements and multiple groups of the second heating elements are continuously arranged along the circumference of the discharge nozzle.

6. The cache heating device according to claim 5, characterized in that: The number of the first heating elements in each group is two, and the two first heating elements in each group are relatively arranged outside the two long side walls. The number of the second heating elements in each group is two, and the two second heating elements in each group are relatively arranged outside the two short side walls.

7. The cache heating device according to claim 4, characterized in that: The first heating element includes a first heating substrate and a first heating wire. The first heating wire is wound outside the first heating substrate, and the first heating wire is used to heat the first heating substrate.

8. The cache heating device according to claim 7, characterized in that: A first receiving groove is formed on the surface of the first heating substrate, the first heating wire is arranged in the first receiving groove, and the first receiving groove is sealed and filled with wet mud to shield and protect the first heating wire.

9. The cache heating device according to claim 8, characterized in that: The depth of the first accommodating groove ranges from 3 mm to 7 mm, the width of the first accommodating groove ranges from 5 mm to 10 mm, and the diameter of the first heating wire ranges from 3 mm to 6 mm.

10. The cache heating device according to claim 7, characterized in that: The second heating element includes a second heating substrate and a second heating wire, wherein the second heating wire is wound outside the second heating substrate and is used to heat the second heating substrate. The rated power of the second heating wire is lower than the rated power of the first heating wire.

11. The cache heating device according to claim 10, characterized in that: A first gap is formed between the first heating substrate and the long side wall, and the range of the first gap is 10 mm to 20 mm; a second gap is formed between the second heating substrate and the short side wall, and the range of the second gap is 5 mm to 20 mm.

12. The cache heating device according to claim 10, characterized in that: The depth of the second accommodating groove ranges from 3 mm to 7 mm, the width of the second accommodating groove ranges from 5 mm to 10 mm, and the diameter of the second heating wire ranges from 2 mm to 5 mm.

13. The cache heating device according to claim 4, characterized in that: The heating element also includes a first filling layer and a second filling layer. The first heating element is spaced apart from the long side wall, and the second heating element is spaced apart from the short side wall. The first filling layer is disposed between the first heating element and the long side wall, and the second filling layer is disposed between the second heating element and the short side wall.

14. The cache heating device according to claim 13, characterized in that: The first filling layer and the second filling layer are both made of wet mud, which includes aluminum oxide, zirconium dioxide, deionized water and sodium silicate. The mass ratios of aluminum oxide, zirconium dioxide, deionized water and sodium silicate are 33-50%, 10-16%, 0-10% and 16-33% respectively.

15. The cache heating device according to claim 1, characterized in that: The cache heating device also includes a connecting row, which is connected to the hopper and is used to connect to a heat source to transfer heat to the hopper.

16. A glass rolling production line, characterized in that: Comprising a cache heating device as described in any one of claims 1 to 15.

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