Device and method for conveying kiln melting glass to rear end

Abstract

The invention relates to the technical field of plate glass manufacturing, in particular to a device and method for conveying kiln melting glass to the rear end. The device for conveying the furnace molten glass to the rear end comprises a molten glass guide pipe structure, a first cooling system and / or a second cooling system, the molten glass guide pipe structure penetrates through a throat in a throat brick to form a glass fluid conveying channel, and the glass fluid conveying channel comprises at least one guide pipe made of platinum or platinum alloy; the first cooling system is arranged on the inner wall of the throat and is not in direct contact with the guide pipe structural body for the molten glass; and the second cooling system is arranged in the throat brick. According to the device for conveying the kiln melting glass to the rear end, the cooling effect of the throat brick is improved, the temperature of the throat brick is reduced, erosion is reduced, and the quality and benefits of glass production are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flat glass manufacturing, and in particular relates to a device and method for transmitting molten glass in a kiln to a rear end. Background Art

[0002] In the manufacturing process of substrate glass, the platinum channel plays a key role, responsible for the fine processing and regulation of the glass fluid flowing out of the kiln to ensure the excellent quality and performance of the substrate glass. The main functions of the platinum channel include clarification, homogenization, temperature regulation and flow control of the glass fluid. Through clarification, bubbles and impurities are removed to improve the purity of the glass, and homogenization makes the composition more uniform to ensure the stability of physical and chemical properties; precise temperature regulation ensures appropriate viscosity and fluidity, which is conducive to subsequent molding, and flow control accurately controls the output to meet production needs. The conduit between the kiln and the platinum channel is an important component connecting the two. Its function is to smoothly guide the glass fluid in the kiln into the platinum channel and play a transition and buffering role. In the early connection between the kiln and the platinum channel, some simpler methods may have been used, such as directly using a channel made of refractory materials to connect the kiln outlet, or using some ordinary metal pipes for connection. However, these early connection methods have many problems. Ordinary refractory materials or metal pipes are prone to severe corrosion and damage under long-term high temperature and glass fluid erosion. This not only leads to a short service life of the connecting parts, requiring frequent replacement and increasing production costs, but may also affect the quality of the glass fluid and the stability of production.

[0003] With the development of glass manufacturing technology, the requirements for connecting parts are getting higher and higher. The reason why platinum conduits are widely used is mainly because of their series of excellent properties. Platinum has extremely high chemical stability and high temperature resistance, and can remain relatively stable under long-term high temperature and glass fluid erosion. The use of platinum conduits can effectively reduce the degree of corrosion of the conduits, extend their service life, and reduce the frequency of equipment maintenance and replacement, which helps to improve the continuity and stability of production and reduce production interruptions and quality fluctuations caused by conduit problems. In addition, platinum conduits can also provide better glass fluid transmission performance. Their relatively smooth surface can reduce the resistance of glass fluid flow, which is conducive to maintaining the uniformity and stability of glass fluid composition. At the same time, in order to further improve the life of flow hole bricks, various cooling schemes are currently widely used. For example, the air cooling scheme sets a cooling air input system and a metal cooling box, and uses exhaust holes to form a large area of ​​uniform cooling air to blow the pool wall around the flow hole; the water cooling and air cooling combination scheme sets a water cooling coil on the outer surface of the flow hole cover brick, and sets a forced air cooling pipe around it, which effectively reduces the temperature of the contact surface and extends the life of the flow hole and even the entire kiln. Specifically, based on the mechanism of corrosion of liquid cave bricks by glass fluid, the industry generally adopts cooling to suppress it. The main principles are: (1) Lowering the temperature to slow down chemical reactions. Glass fluid has strong corrosion to liquid cave bricks at high temperatures, which involves a series of complex chemical reactions. Physical cooling can reduce the surface temperature of liquid cave bricks. The reduction in temperature slows down the rate of chemical reactions, thereby reducing the degree of chemical reaction between the glass fluid and the liquid cave bricks. (2) Reduce thermal stress. Liquid cave bricks will be subjected to greater thermal stress at high temperatures. When the temperature changes greatly, thermal stress may cause cracks, peeling and other damage to the brick body. Physical cooling can reduce the temperature gradient of liquid cave bricks and reduce the generation of thermal stress. In addition, the cooling system can make the surface temperature of liquid cave bricks more uniform, avoiding local overheating or overcooling, which can reduce the damage to the brick body caused by thermal stress and extend its service life. (3) Change the physical properties of the glass fluid. Cooling can increase the viscosity of the glass fluid and reduce its fluidity, which weakens the scouring effect of the glass fluid on the flow hole bricks and reduces the degree of physical erosion. The friction of the glass fluid with higher viscosity on the bricks during the flow process is reduced, thereby reducing the wear on the brick surface. Traditional cooling solutions are generally set on the external surface of the flow hole bricks, including water pipes, spraying, and air duct blowing, but the improvement effect is general, mainly because the thickness of the bricks is large, and the cooling effect can only reach a certain range, and it is not possible to effectively suppress the internal area. Summary of the invention The object of the present invention is to provide a device for conveying molten glass from a furnace to a rear end, so as to solve the problem in the prior art that the flow hole bricks are eroded by the glass fluid due to the poor cooling effect of the flow hole bricks.

[0004] In order to solve the above problems, the present invention proposes a device for conveying molten glass from a kiln to a rear end, and the technical solution adopted is: A device for conveying molten glass from a furnace to a rear end, comprising: a conduit structure for molten glass, a first cooling system, and / or a second cooling system, The conduit structure for molten glass penetrates the flow hole in the flow hole brick to form a glass fluid transmission channel, and includes at least one conduit made of platinum or platinum alloy; The first cooling system is arranged on the inner wall of the flow hole and is not in direct contact with the molten glass conduit structure; The second cooling system is arranged inside the liquid flow hole brick.

[0005] Furthermore, the first cooling system includes a cooling plate or a multi-layer cold air pipe, which is arranged in the flow hole brick on the inner wall of the flow hole and forms a flow on both sides of the outer wall of the molten glass conduit structure.

[0006] Furthermore, the second cooling system includes cooling plates or cooling pipes, which are embedded in the flow hole bricks, so that the flow hole bricks are modularly designed and flow is formed in the flow hole bricks on both sides of the outer wall of the molten glass conduit structure.

[0007] Furthermore, the shape of the conduit made of platinum or platinum alloy is a bellows shape, and the structure of the bellows shape includes a first bellows structure and / or a second bellows structure.

[0008] Furthermore, the outer contour of the first corrugated tube structure is designed as a first wave crest and a first wave trough, the design of the first wave crest is a combination of a wave crest and a straight tube, and the width c of a single first wave trough in the first corrugated tube structure is 1 The relationship between the outer diameter D of the catheter made of platinum or platinum alloy is: 0.02D<c 1 <0.04D, the pitch p of adjacent first wave valleys in the first bellows structure 1 The width of the first trough is c 1 The relationship is: 0.5 c 1 <p 1 <2.0 c 1 .

[0009] Furthermore, the outer contour of the second bellows structure is designed as a second wave crest and a second wave trough, the second wave crest is designed as a single wave crest, and the width c of the second wave trough in the second bellows structure is 2 The relationship between the outer diameter D of the catheter made of platinum or platinum alloy is: 0.02D<c 2<0.04D, the pitch p of adjacent second wave valleys in the second bellows structure 2 The width of a single second wave valley c 2 The relationship is: p 2 =c 2 .

[0010] Furthermore, the axial length H of the conduit structure for molten glass is greater than the axial length of the flow hole, so that the end of the conduit structure for molten glass into which the glass fluid flows extends out of the end of the flow hole corresponding thereto, and the relationship between the length L of the extended part and the axial length H of the conduit structure for molten glass and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.05D<L<0.3H.

[0011] Furthermore, a protective baffle is provided on the outer side of one end of the flow hole close to the glass fluid, and the protective baffle is provided along the outer peripheral surface of the conduit structure for molten glass and is attached to the side wall of the flow hole brick close to the glass fluid. The relationship between the distance f between the side of the protective baffle close to the glass fluid and the end face of the end of the conduit structure for molten glass close to the glass fluid and the length L of the protruding part is: 0.9L<f≤L.

[0012] Furthermore, an external docking surface is provided at the end face of the end of the conduit structure for molten glass away from the glass fluid, for connecting to other conduits; the external docking surface is provided along the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the external docking surface to the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid is greater than 25 mm.

[0013] The present invention also provides a method for conveying furnace molten glass to a rear end, based on the above-mentioned device for conveying furnace molten glass to a rear end, comprising the following steps: S1, disposing a first cooling system on the inner wall of the flow hole without contacting the molten glass conduit structure, and / or disposing a second cooling system inside the flow hole brick; S2, passing the molten glass conduit structure through the flow hole formed by the flow hole brick to form a glass fluid transmission channel for conveying the glass fluid; S3, passing the cooling medium into the first cooling system and / or the second cooling system to form a cooling circulation.

[0014] Compared with the prior art, this application has the following beneficial effects: The present invention is an improved invention. The present invention realizes the cooling of the inner pool wall surface by setting a first cooling system on the inner wall of the flow hole, effectively reducing the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion, and extending the life of the structure. At the same time, the cooling system can also make certain adjustments to the temperature of the molten glass close to the inner wall of the flow hole brick, thereby improving the quality and stability of glass production. The present application also includes a second cooling system set inside the flow hole brick, so that the flow hole brick can better adapt to the temperature and erosion conditions of different parts through a block design, and a flexible modular design is performed to improve the pertinence and effectiveness of cooling. The cooling system can directly cool the parts in contact with the glass fluid, further improving the cooling effect, reducing the temperature of the flow hole brick, reducing erosion, and improving the quality and efficiency of glass production.

[0015] The first cooling system includes a cooling plate or a multi-layer cold air pipe, which is arranged in the flow hole brick on the inner wall of the flow hole and forms a flow on both sides of the outer wall of the molten glass conduit structure, directly reducing the temperature of the glass fluid transmitted to the flow hole brick, effectively reducing the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion, and extending the structural life.

[0016] The second cooling system includes a cooling plate or a cooling pipe, which is embedded in the flow hole brick, so that the flow hole brick is modularly designed and flows in the flow hole bricks on both sides of the outer wall of the molten glass conduit structure, so as to better adapt to the temperature and erosion conditions of different parts and improve the pertinence and effectiveness of cooling.

[0017] The shape of the conduit made of platinum or platinum alloy is a bellows shape, and the structural form of the bellows shape includes a first bellows structure and / or a second bellows structure. The structural form of the bellows shape enables the conduit made of platinum or platinum alloy to have higher bending strength and torsional strength. When subjected to external force, the corrugations can disperse stress and reduce local stress concentration, thereby improving the strength of the entire structure.

[0018] The outer contour of the first corrugated tube structure is designed as a first wave crest and a first wave trough, the design of the first wave crest is a combination of a wave crest and a straight tube, and the width c of a single first wave trough in the first corrugated tube structure is 1 The relationship between the outer diameter D of the catheter made of platinum or platinum alloy is: 0.02D<c 1 <0.04D, the pitch p of adjacent first wave valleys in the first bellows structure 1 The width of the first trough is c 1 The relationship is: 0.5 c 1 <p 1 <2.0 c 1 , ensuring that the catheter made of platinum or platinum alloy has higher bending strength and torsional strength.

[0019] The outer contour of the second bellows structure is designed as a second wave crest and a second wave trough, the second wave crest is designed as a single wave crest, and the width c of the second wave trough in the second bellows structure is 2 The relationship between the outer diameter D of the catheter made of platinum or platinum alloy is: 0.02D<c 2 <0.04D, the pitch p of adjacent second wave valleys in the second bellows structure 2 The width of a single second wave valley c 2 The relationship is: p 2 =c 2 The second bellows structure is more excellent in resisting external forces, and at the same time, the structure also has more excellent radial external force release performance, and the pitch of the crest and trough just meets a complete crest or trough width c.

[0020] The axial length H of the conduit structure for molten glass is greater than the axial length of the flow hole, so that the end of the conduit structure for molten glass into which the glass fluid flows extends out of the end of the corresponding flow hole, and the relationship between the length L of the extended portion and the axial length H of the conduit structure for molten glass and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.05D<L<0.3H. It is prevented that the end of the conduit structure for molten glass into which the glass fluid flows is flush with the surface of the flow hole brick, and the erosion effect of the glass fluid on the root of the flow hole brick is further reduced.

[0021] A protective baffle is provided on the outer side of one end of the flow hole close to the glass fluid, and the protective baffle is provided along the outer peripheral surface of the conduit structure for molten glass and is attached to the side wall of the flow hole brick close to the glass fluid. The relationship between the distance f between the side of the protective baffle close to the glass fluid and the end face of the conduit structure for molten glass close to the glass fluid and the length L of the extended portion is: 0.9L<f≤L. The protective baffle is placed as close to the inner pool wall of the flow hole brick as possible to prevent the glass fluid from directly entering the matching gap between the conduit and the flow hole brick from the rear side of the protective baffle, so as to prevent the erosion problem from occurring in advance.

[0022] An external docking surface is provided at the end face of the end of the conduit structure for molten glass away from the glass fluid, for connecting with other conduits; the external docking surface is provided along the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the external docking surface to the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid is greater than 25 mm, so as to prevent the glass fluid from flowing out of the external docking surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 11 is a schematic structural diagram of a first cooling system in Embodiment 1 of the device for conveying molten glass in a furnace to a rear end of the present invention; Figure 2 1 is a schematic structural diagram of a second cooling system in Embodiment 1 of the device for conveying molten glass in a kiln to a rear end of the present invention; Figure 3 It is a schematic diagram of assembly dimensions of the device for conveying molten glass from a furnace to a rear end in Embodiment 3 of the present invention; Figure 4 Schematic diagram of the corrugated structure of the conduit in the second embodiment of the device for conveying molten glass from a furnace to a rear end of the present invention; Figure 5 Schematic diagram of the corrugation form of the conduit in the second embodiment of the device for conveying molten glass from a furnace to a rear end of the present invention; Figure 6 It is a schematic diagram of the erosion state of the conduit and the flow hole brick without a protective structure in the prior art; Figure 7 The erosion state of the flow hole bricks of the inner guard plate structure is increased in the embodiment 3 of the device for conveying molten glass of the furnace to the rear end of the present invention; In the figure, 1. platinum-rhodium alloy conduit; 2. flow hole brick; 3. external docking surface; 4. protective baffle; 5. first coolant inlet; 6. first coolant outlet; 7. glass fluid; 8. second coolant inlet; 9. second coolant outlet; 10. first bellows structure; 11. second bellows structure. DETAILED DESCRIPTION

[0024] As cited in the background art, in the prior art, the flow hole bricks are not cooled well, which causes the flow hole bricks to be corroded by the glass fluid. Therefore, the present invention provides a device for conveying molten glass from a furnace to a rear end, comprising: a molten glass conduit structure, a first cooling system, and / or a second cooling system. The conduit structure for molten glass passes through the flow hole in the flow hole brick to form a glass fluid transmission channel, which includes at least one conduit made of platinum or platinum alloy for transmitting glass fluid; the first cooling system is arranged on the inner wall of the flow hole and is not in direct contact with the conduit structure for molten glass, directly reducing the temperature of the glass fluid transmitted to the flow hole brick, effectively reducing the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion rate, and extending the life of the structure; the second cooling system is arranged inside the flow hole brick, so that the flow hole brick can better adapt to the temperature and erosion conditions of different parts through block design, and a flexible modular design is carried out to improve the pertinence and effectiveness of cooling. The cooling system can directly cool the parts contacted by the glass fluid, further improve the cooling effect, reduce the temperature of the flow hole brick, reduce erosion, and improve the quality and efficiency of glass production.

[0025] Specific embodiment 1 of the device for conveying molten glass from a furnace to a rear end of the present invention: In this embodiment, Figure 1 and Figure 2 As shown, the device for conveying molten glass from a furnace to the rear end comprises: a conduit structure for molten glass, a first cooling system and a second cooling system. The conduit structure for molten glass penetrates the flow hole in the flow hole brick 2 to form a glass fluid 7 transmission channel, and comprises at least one conduit made of platinum or a platinum alloy; the first cooling system is arranged on the inner wall of the flow hole and is not in direct contact with the conduit structure for molten glass; the second cooling system is arranged inside the flow hole brick 2.

[0026] The flow hole bricks 2 of the early platinum-free tube kilns are very easy to be damaged due to direct erosion by the glass fluid 7. In addition, erosion will change the thermal conductivity of the flow hole bricks 2. The thermal conductivity of the refractory material usually changes with the degree of erosion, which may cause uneven temperature distribution inside the kiln and affect the melting and forming process of the glass. Due to the shortened lifespan, the flow hole bricks 2 need to be replaced frequently, which not only increases production costs, but also affects the production efficiency of the kiln. Each replacement of the flow hole bricks 2 requires shutdown, which will cause production interruptions and bring economic losses to the company. Therefore, the present application selects a noble metal material with better high temperature resistance and purity as the inner lining cavity of the flow hole, which solves the problem that the refractory channel of the glass fluid 7 is not resistant to erosion.

[0027] Specifically, the conduit made of platinum or platinum alloy contains precious metal materials such as platinum, palladium, rhodium, iridium, rhenium, tantalum, etc., and the impurities in the precious metal materials are less than 0.05% by mass, among which Fe element is less than 0.005% and C element is less than 0.005%. The cross-sectional shape of the conduit made of platinum or platinum alloy is generally circular.

[0028] In other embodiments, according to the upper and lower temperature difference requirements of the conduit made of platinum or platinum alloy, the cross-sectional shape of the conduit made of platinum or platinum alloy can be designed to be circular, elliptical, racetrack or other shapes containing curved surfaces.

[0029] In this embodiment, the material of the conduit can be a combination of platinum and rhodium, that is, a platinum-rhodium alloy conduit 1, wherein the mass percentage of platinum is greater than 80%. When the first cooling system is used, the platinum-rhodium alloy conduit 1 and the flow hole brick 2 are assembled in a cold state. Therefore, according to the assembly and cooling requirements, an assembly gap t is reserved between the platinum-rhodium alloy conduit 1 and the flow hole brick 2. The assembly gap t and the outer diameter D of the platinum-rhodium alloy conduit 1 meet the following relationship: 0.01D<t<0.05D, which can meet the installation and expansion requirements of the platinum-rhodium alloy conduit 1 during the heating process.

[0030] In other embodiments, the material of the catheter may be a platinum material, that is, the mass percentage of platinum in the platinum material is 100%.

[0031] In this embodiment, Figure 1 As shown, the first cooling system includes a cooling plate or a multi-layer cold air pipe, which is arranged in the flow hole brick 2 on the inner wall of the flow hole, and forms a flow on both sides of the outer wall of the molten glass conduit structure, so that the refractory material in contact with the conduit is locally cooled down, directly reducing the temperature of the glass fluid 7 transmitted to the flow hole brick 2, effectively reducing the temperature of the flow hole brick 2, slowing down its resistance to the erosion of the glass fluid 7, and extending the life of the structure. This cooling method is the inner pool wall surface cooling method, and the material of the cooling plate or the multi-layer cold air pipe is the same platinum-rhodium alloy as the platinum-rhodium alloy conduit 1. Among them, the cooling plate or the multi-layer cold air pipe includes a first coolant inlet 5 and a first coolant outlet 6. The first coolant inlet 5 is arranged on one side of the outer wall of the conduit structure for molten glass and is arranged outside the flow cave brick 2. The first coolant outlet 6 is arranged on the other side of the outer wall of the conduit structure for molten glass and is arranged outside the flow cave brick 2. The first coolant inlet 5 and the first coolant outlet 6 are respectively used for the inflow and outflow of cooling water or cooling air, forming the circulation of coolant in the cooling plate or the multi-layer cold air pipe to achieve cooling effects of different effects.

[0032] In order to further improve the cooling effect, such as Figure 2 As shown, the second cooling system includes a cooling plate or a cooling pipe, which is embedded in the flow cave brick 2, so that the flow cave brick 2 is modularly designed, and a circulation is formed in the flow cave brick 2 of the outer wall of the molten glass conduit structure, so as to better adapt to the temperature and erosion conditions of different parts, and improve the pertinence and effectiveness of cooling. Among them, the cooling plate or cooling pipe includes a second coolant inlet 8 and a second coolant outlet 9, and is arranged outside the flow cave brick 2; the second coolant inlet 8 is arranged on one side of the outer wall of the molten glass conduit structure, and is arranged outside the flow cave brick 2, and the second coolant outlet 9 is arranged on the other side of the outer wall of the molten glass conduit structure, and the second coolant inlet 8 and the second coolant outlet 9 are respectively used for the inflow and outflow of cooling water or cooling wind, so as to form the circulation of coolant in the cooling plate or cooling pipe, and improve the pertinence and effectiveness of cooling. The internally embedded cooling structure can directly cool the part contacted by the molten glass, further reduce the temperature of the flow cave brick 2, and reduce erosion.

[0033] In another real-time mode, an apparatus for transferring molten glass from a furnace to a back end includes a conduit structure for molten glass and a first cooling system.

[0034] In other real-time methods, an apparatus for transferring molten glass from a furnace to a back end includes a conduit structure for molten glass and a second cooling system.

[0035] Specific embodiment 2 of the device for conveying molten glass from a furnace to a rear end of the present invention: Based on the above technical concept of the present invention, or based on the above specific embodiment of the present invention, another embodiment is provided below.

[0036] The material of the catheter is platinum-rhodium alloy, and its high temperature and corrosion resistance are significantly improved. However, in a high temperature environment exceeding 1560°C, the strength of the tube body itself also needs to be improved. Therefore, the outer contour of the platinum-rhodium alloy catheter 1 is mechanically optimized, that is, a bellows structure is adopted. The corrugated shape of the bellows gives the catheter higher bending strength and torsional strength. When subjected to external force, the corrugations can disperse stress and reduce local stress concentration, thereby improving the strength of the entire structure. Compared with traditional straight tubes, the corrugated shape of the bellows increases the surface area of ​​the material, allowing heat to be distributed more evenly and reducing the risk of local overheating. In a high temperature environment, the material will expand thermally. The corrugated structure of the bellows can provide a certain amount of thermal expansion compensation and reduce the stress caused by thermal expansion and contraction. In addition, the elasticity of the corrugations enables the bellows to automatically adjust its shape when the temperature changes, thereby reducing the impact of thermal stress on the structure. Therefore, the present invention uses this form as the main support strength design of the catheter.

[0037] Specifically, in this embodiment, Figure 4 As shown, the shape of the conduit made of platinum or platinum alloy is a bellows shape, and the structural form of the bellows shape includes a first bellows structure 10. The structural form of the bellows shape enables the conduit made of platinum or platinum alloy to have higher bending strength and torsional strength. When subjected to external force, the corrugations can disperse stress and reduce local stress concentration, thereby improving the strength of the entire structure.

[0038] Specifically, Figure 5 As shown, the outer contour of the first corrugated tube structure 10 is designed as a first wave crest and a first wave valley. The design of the first wave crest is a combination of a wave crest and a straight tube. The width c of a single first wave valley in the first corrugated tube structure 10 is 1 The relationship between the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.02D<c 1 <0.04D, the pitch p of adjacent first wave valleys in the first bellows structure 10 1 The width of the first trough is c 1 The relationship is: 0.5 c 1 <p 1 <2.0 c 1 , ensuring that the platinum-rhodium alloy catheter 1 has higher bending strength and torsional strength.

[0039] In other embodiments, the shape of the conduit made of platinum or platinum alloy is a bellows shape, and the bellows shape structure includes a second bellows structure 11. Specifically, the outer contour of the second bellows structure 11 is designed as a second wave crest and a second wave trough, the second wave crest is designed as a single wave crest, and the width c of the second wave trough in the second bellows structure 11 is 2 The relationship between the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.02D<c 2 <0.04D, the pitch p of adjacent second wave valleys in the second bellows structure 11 2 The width of a single second wave valley c 2 The relationship is: p 2 =c 2 The second bellows structure 11 is more excellent in resisting external forces, and at the same time, the structure also has a better radial external force release performance, and the pitch of the crest and trough just meets the width c of a complete crest or trough. 2 .

[0040] In other embodiments, the shape of the conduit made of platinum or platinum alloy is a bellows shape, and the structure of the bellows shape includes the first bellows structure 10 and the second bellows structure 11 mentioned above.

[0041] Specific embodiment 3 of the device for conveying molten glass from a furnace to a rear end of the present invention: Based on the above technical concept of the present invention, or based on the above specific embodiment of the present invention, another embodiment is provided below.

[0042] According to the glass flow simulation analysis in the conduit area, in order to further reduce the erosion effect of the glass fluid 7 on the root of the flow hole brick 2, in this embodiment, Figure 3 As shown, the axial length H of the conduit structure for molten glass is greater than the axial length of the flow hole, so that the end of the conduit structure for molten glass into which the glass fluid 7 flows extends out of the end of the flow hole corresponding thereto, avoiding that the end of the conduit structure for molten glass into which the glass fluid 7 flows is flush with the surface of the flow hole brick 2, and the relationship between the length L of the extended portion and the axial length H of the conduit structure for molten glass and the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.05D<L<0.3H, further reducing the erosion effect of the glass fluid 7 on the root of the flow hole brick 2.

[0043] refer to Figure 6, because there is no baffle design at the end of the conduit of the flow hole brick 2, the glass fluid 7 has a very serious erosion on this area. Due to the lack of baffle protection, the glass fluid 7 can directly impact the inner wall of the flow hole brick 2, causing a continuous erosion reaction on its inner surface. Specifically, the erosion mechanism of the glass fluid 7 on the kiln flow hole brick 2 is mainly divided into three forms: chemical reaction erosion, physical scouring erosion and thermal stress erosion. If the erosion of the flow hole brick 2 is not effectively controlled, the structural strength may eventually decrease due to the reduction in thickness, which may cause the rupture and collapse of the flow hole brick 2, thereby affecting the stability and life of the kiln; the erosion also causes the surface of the flow hole brick 2 to become rough and uneven, which will affect the local flow performance of the glass fluid 7, causing the local eddy current of the glass fluid 7 to deteriorate and expand, thereby aggravating the further deterioration of the problem; in addition, the erosion of the flow hole brick 2 will produce a large amount of waste residue and impurities, which may enter the glass fluid 7 and affect the purity and quality of the glass.

[0044] Therefore, in this embodiment, reference Figure 3 and 7 A protective baffle 4 is arranged on the outer side of one end of the flow hole close to the glass fluid 7. The protective baffle 4 is arranged along the outer peripheral surface of the conduit structure for molten glass and is attached to the side wall of the flow hole brick 2 close to the glass fluid 7. The relationship between the distance f between the side of the protective baffle 4 close to the glass fluid 7 and the end face of the end of the conduit structure for molten glass close to the glass fluid 7 and the length L of the protruding part is: 0.9L<f≤L, and the wall thickness of the protective baffle 4 is negligible compared with the length L. Among them, the protective baffle 4 is connected to the conduit structure for molten glass by welding. The above structure makes the protective baffle 4 as close to the inner pool wall of the flow hole brick 2 as possible, avoiding the glass fluid 7 from directly entering the matching gap between the conduit and the flow hole brick 2 from the rear side of the protective baffle 4, so that the erosion problem occurs in advance. The protective baffle 4 forms a physical barrier on the inner pool wall of the flow hole brick 2, directly blocking the impact of the glass fluid 7 on the inner surface of the flow hole brick 2. During the flow of the glass fluid 7, it first contacts the protective baffle 4 instead of directly impacting the flow hole brick 2, which can greatly reduce the direct scouring force of the glass fluid 7 on the brick body, thereby slowing down the erosion rate. In addition, the existence of the protective baffle 4 changes the flow path of the glass fluid 7. After the glass fluid 7 encounters the protective baffle 4, its flow direction will change, so that part of the impact force is dispersed and weakened, further reducing the erosion effect of the glass protection on the flow hole brick 2. The shape of the protective baffle 4 can be circular or partially circular, elliptical or partially elliptical, rectangular or other polygonal structures.

[0045] In other embodiments, considering that the space between the bottom of the conduit and the bottom of the kiln pool is limited, the structure can be designed as a special-shaped structure, that is, the lower part is a straight rectangle and the upper part is a rounded rectangle or semicircular design, which can protect the surface of the flow hole brick 2 in the area around the conduit to the greatest extent.

[0046] In other embodiments, the protective baffle 4 is arranged along the outer peripheral surface of the molten glass conduit structure and may not be attached to the side wall of the flow hole brick 2 close to the glass fluid 7, that is, the protective baffle 4 is at a certain distance from the side wall of the flow hole brick 2 close to the glass fluid 7.

[0047] In the present embodiment, an external docking surface 3 is provided at the end face of the end of the conduit structure for molten glass away from the glass fluid 7, for connecting to other conduits; the external docking surface 3 is provided along the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid 7, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the external docking surface 3 to the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid 7 is greater than 25 mm, preferably 30 mm. Specific embodiment 1 of the method for transferring molten glass from a furnace to a rear end of the present invention: In this embodiment, based on the above-mentioned device for conveying furnace molten glass to the rear end, the method for conveying furnace molten glass to the rear end includes the following steps: First, a first cooling system is arranged on the inner wall of the flow hole without contacting the molten glass conduit structure, and / or a second cooling system is arranged inside the flow hole brick 2; Secondly, the molten glass conduit structure is passed through the flow hole in the flow hole brick 2 to form a glass fluid 7 transmission channel for conveying the glass fluid 7; Finally, the cooling medium is introduced into the first cooling system and / or the second cooling system to form a cooling circulation.

[0048] Specifically, the method for transferring the molten glass in the kiln to the back end comprises the following steps: First, a cooling plate or a multi-layer cold air pipe is arranged in the flow hole brick 2 on the inner wall of the flow hole, and a flow is formed on both sides of the outer wall of the molten glass conduit structure, and / or a cooling plate or a cooling pipe is embedded in the flow hole brick 2, so that the flow hole brick 2 is modularly designed, and a flow is formed in the flow hole brick 2 on both sides of the outer wall of the molten glass conduit structure; Secondly, at least one conduit made of platinum or platinum alloy is passed through the flow hole in the flow hole brick 2 to form a glass fluid 7 transmission channel for conveying the glass fluid 7; Finally, cooling water or cooling air flows in and out through the first coolant inlet 5 and the first coolant outlet 6 ; and / or, cooling water or cooling air flows in and out through the second coolant inlet 8 and the second coolant outlet 9 .

[0049] Through the above description of the specific embodiment of the device for conveying molten glass from a furnace to the rear end of the present invention, it can be seen that the device for conveying molten glass from a furnace to the rear end of the present invention comprises: a conduit structure for molten glass, a first cooling system, and / or a second cooling system. The conduit structure for molten glass penetrates the flow hole in the flow hole brick to form a glass fluid transmission channel, and comprises at least one conduit made of platinum or a platinum alloy for conveying glass fluid; the first cooling system is arranged on the inner wall of the flow hole and is not in direct contact with the conduit structure for molten glass, directly reducing the temperature of the glass fluid transmitted to the flow hole brick, effectively reducing the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion, and extending the structural life; the second cooling system is arranged inside the flow hole brick, so that the flow hole brick can better adapt to the temperature and erosion conditions of different parts through the block design, and a flexible modular design is performed to improve the pertinence and effectiveness of cooling. The cooling system can directly cool the part in contact with the glass fluid, further improving the cooling effect, reducing the temperature of the flow hole brick, reducing erosion, and improving the quality and efficiency of glass production.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A device for conveying molten glass from a furnace to a rear end, characterized in that: include: a conduit structure for molten glass, a first cooling system, and / or a second cooling system, The conduit structure for molten glass axially penetrates the flow hole in the flow hole brick (2) to form a glass fluid (7) transmission channel, and includes at least one conduit made of platinum or a platinum alloy; The first cooling system is arranged on the inner wall of the flow hole and is not in direct contact with the molten glass conduit structure; The second cooling system is arranged inside the liquid flow hole brick (2).

2. The device for conveying molten glass from a furnace to a rear end according to claim 1, characterized in that: The first cooling system comprises a cooling plate or a multi-layer cold air pipe, wherein the cooling plate or the multi-layer cold air pipe is arranged in a flow hole brick (2) on the inner wall of the flow hole and forms a flow on both sides of the outer wall of the molten glass conduit structure.

3. The device for conveying furnace molten glass to the rear end according to claim 1, characterized in that: The second cooling system comprises a cooling plate or a cooling pipe, wherein the cooling plate or the cooling pipe is embedded in the flow hole brick (2), so that the flow hole brick (2) is modularly designed and a flow is formed in the flow hole bricks (2) on both sides of the outer wall of the conduit structure for molten glass.

4. The device for conveying furnace molten glass to the rear end according to claim 1, characterized in that: The platinum or platinum alloy conduit is in the shape of a bellows, and the structure of the bellows includes a first bellows structure (10) and / or a second bellows structure (11).

5. The device for conveying furnace molten glass to the rear end according to claim 4, characterized in that: The outer contour of the first corrugated tube structure (10) is designed as a first wave crest and a first wave trough, the first wave crest is designed as a combination of a wave crest and a straight tube, the relationship between the width c1 of a single first wave trough in the first corrugated tube structure (10) and the outer diameter D of a conduit made of platinum or a platinum alloy is: 0.02D<c1<0.04D, and the relationship between the pitch p1 of adjacent first wave troughs in the first corrugated tube structure (10) and the width c1 of a single first wave trough is: 0.5 c1<p1<2.0 c1.

6. The device for conveying furnace molten glass to the rear end according to claim 4, characterized in that: The outer contour of the second bellows structure (11) is designed as a second wave crest and a second wave trough, the second wave crest is designed as a single wave crest, the relationship between the width c2 of the second wave trough in the second bellows structure (11) and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D<c2<0.04D, and the relationship between the pitch p2 of adjacent second wave troughs in the second bellows structure (11) and the width c2 of a single second wave trough is: p2=c2.

7. The device for conveying furnace molten glass to the rear end according to claim 1, characterized in that: The axial length H of the conduit structure for molten glass is greater than the axial length of the flow hole, so that the end of the conduit structure for molten glass into which the glass fluid (7) flows extends out of the end of the flow hole corresponding thereto, and the relationship between the length L of the extended portion and the axial length H of the conduit structure for molten glass and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.05D<L<0.3H.

8. The device for conveying furnace molten glass to the rear end according to claim 7, characterized in that: A protective baffle (4) is arranged on the outer side of one end of the flow hole close to the glass fluid (7); the protective baffle (4) is arranged along the outer peripheral surface of the molten glass conduit structure and is attached to the side wall of the flow hole brick (2) close to the glass fluid (7); the relationship between the distance f between the side of the protective baffle (4) close to the glass fluid (7) and the end face of the end of the molten glass conduit structure close to the glass fluid (7) and the length L of the protruding portion is: 0.9L<f≤L.

9. The device for conveying furnace molten glass to the rear end according to claim 7, characterized in that: An outer butt joint surface (3) is provided at the end surface of the end of the conduit structure for molten glass away from the glass fluid (7) for connection with another conduit; the outer butt joint surface (3) is provided along the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid (7), and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the outer butt joint surface (3) to the outer peripheral surface of the end of the conduit structure for molten glass away from the glass fluid (7) is greater than 25 mm.

10. A method for conveying furnace molten glass to a rear end, characterized in that: The device for conveying molten glass from a furnace to a rear end according to any one of claims 1 to 9 comprises the following steps: S1, arranging a first cooling system on the inner wall of the flow hole without contacting the molten glass conduit structure, and / or arranging a second cooling system inside the flow hole brick (2); S2, passing the molten glass conduit structure through the flow hole in the flow hole brick (2) to form a glass fluid (7) transmission channel for conveying the glass fluid (7); S3, passing the cooling medium into the first cooling system and / or the second cooling system to form a cooling circulation.

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