High-temperature-resistant platinum channel strengthening structure and method

Abstract

The invention discloses a high-temperature-resistant platinum channel strengthening structure and method, and relates to the technical field of service life and reliability of substrate glass manufacturing equipment.The combination of a platinum tube and a ceramic layer is used, and the used platinum tube and ceramic layer are further fixedly connected through a traction mechanism to form a platinum channel; and the ceramic layer and the platinum tube are tightly attached and connected, so that the overall reinforcement of the internal platinum tube is realized, the performance and stability of the high-temperature-resistant platinum channel are effectively enhanced, the service life of the platinum channel is prolonged, and the quality and benefit of a high-temperature molten glass conveying link in a glass production process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of life and reliability of substrate glass manufacturing equipment, and in particular to a high-temperature resistant platinum channel strengthening structure and method. Background Art

[0002] In today's era of rapid technological development, substrate glass technology is undergoing a series of technological changes, with increasingly rich product types and a diversified development trend. In the production and manufacturing of substrate glass, the platinum channel occupies a core position. It is like a key hub of the entire production system, and has a vital impact on glass quality and production efficiency. However, the working environment faced by the platinum channel is extremely harsh. During normal operation, it needs to withstand ultra-high temperatures of up to 1400°C or even close to 1700°C for a long time. Such extreme high temperature conditions put forward multi-level and all-round requirements for the life and reliability of platinum channel equipment. In the long run, the production of ultra-high temperature glass will replace the existing conventional substrate glass technology on a large scale.

[0003] Due to the complexity of the production process, the platinum channel has obvious temperature differences in different areas, with high temperature areas and relatively low temperature areas. Moreover, its cross-sectional shape and size are not uniform and there are also various differences. This complex working condition makes the platinum channel face many challenges during operation. When subjected to high temperatures, the strength of metal materials such as platinum will inevitably decay. Once there is an unreasonable structural design, whether in high temperature areas or in areas where the temperature is relatively low but the cross-sectional size is large, there is a risk of local collapse and deformation. This deformation problem will not only affect the continuity of production, but may even lead to the end of the production line.

[0004] Traditionally, in order to improve the performance of platinum channels, people have made many attempts to optimize structural design. For example, the material strength is improved by increasing the rhodium content in the platinum-rhodium alloy, but in practice it is found that when the rhodium content increases to a certain level, its effect on improving material strength begins to become weak and cannot meet the needs of further strengthening. Another common method is to increase the wall thickness, but this will lead to a series of new problems. The increase in wall thickness means a substantial increase in the cost of raw materials, and also brings more difficulties and cost investment to the manufacturing, processing and installation links. During the manufacturing process, thicker walls may require special processing technology and surface treatment methods; during installation, there will also be safety issues in handling and lifting due to changes in weight and size.

[0005] In summary, considering the need to improve the strength, reliability and life of the existing platinum channel, the traditional optimization ideas can no longer meet the development needs. Therefore, it is urgent to re-examine and redesign the structure of the platinum channel from a new perspective. Summary of the invention

[0006] The present invention provides a high temperature resistant platinum channel reinforcement structure and method, which is dedicated to significantly improving the performance, stability and service life of the platinum channel in a high temperature environment. On the one hand, the present invention provides a high-temperature resistant platinum channel reinforcement structure, including a platinum tube and a ceramic layer, wherein the platinum tube and the ceramic layer are fixedly connected by a pulling mechanism.

[0007] Preferably, there are multiple pulling mechanisms, and the multiple pulling mechanisms are welded to the platinum tube in a spot welding manner. The pulling mechanism includes a pulling rod and a pulling base, and the pulling rod and the pulling base are fixed by welding.

[0008] Preferably, the pulling rod includes a main rod and a welding end, the welding end includes four tentacles, the main rod is fixedly connected to the welding end, the welding end is welded to the pulling base through welding points, the welding points are located on the four tentacles of the welding end, a limiting ring is sleeved on the part of the main rod extending out of the ceramic layer, the limiting ring is tightly attached to the outer surface of the ceramic layer, the diameter range of the main rod is 5mm to 10mm, the main rod is a hollow tube, and the welding contact range of the welding end is 225mm 2 ~900mm 2 The pulling base matches the welding contact of the welding end.

[0009] Preferably, the number of the ceramic layers is multiple, and an expansion gap is provided between adjacent ceramic layers, and the width k of the expansion gap is equal to the length L of the single ceramic layer. 1 Need to satisfy: k>L 1 / 50.

[0010] Preferably, the ceramic layer includes a main curved surface and pulling holes, the main curved surface is provided with the pulling holes, the main curved surface is divided into two halves or four halves, the main curved surface matches the outer contour of the platinum tube, and the pulling holes are synchronized in number and distribution position with the pulling mechanism.

[0011] Preferably, the fitting gap c between the main body curved surface and the outer contour of the platinum tube needs to satisfy: c≤0.5mm, the pulling hole close to the inner surface of the ceramic layer is a circular or square space, the pulling hole away from the inner surface of the ceramic layer is a circular straight hole, the pulling base and the welding end are built into the circular or square space, the main rod passes through the circular straight hole, and the inner diameter of the circular straight hole is 4mm larger than the outer diameter of the main rod.

[0012] Preferably, the cross-sectional shape of the platinum tube is circular, elliptical or racetrack-shaped, the vertical height H and the horizontal width L of the platinum tube (1) must satisfy the following conditions: 150 mm < H ≤ 400 mm, 150 mm < L ≤ 900 mm, respectively, and the single section length L of the ceramic layer is 1 Need to meet: 200mm< L 1 <700mm, the thickness h of the ceramic layer needs to satisfy: 10mm<h<50mm.

[0013] Preferably, the distribution of the pulling mechanism on a single cross section of the platinum tube (1) includes: equiangular distribution of 30°, 60°, 90° around the circumference or non-equiangular distribution at the upper and lower parts, and the distribution number N at the upper part is t and the number of distributions N in the lower part b Need to meet: N t ≥N b , the spacing f between adjacent sections must satisfy: 200mm<f<500mm.

[0014] On the other hand, the present invention provides a high temperature resistant platinum channel strengthening method, the method comprising: The platinum tube and the ceramic layer are fixedly connected via a pulling mechanism.

[0015] Preferably, the fixed connection between the platinum tube and the ceramic layer through a pulling mechanism comprises the following steps: S1, welding and fixing the pulling rod and the pulling base to form a pulling mechanism; S2, spot welding the pulling mechanism according to the points marked on the platinum tube; S3, after all the pulling mechanisms and the platinum tubes are welded, the ceramic layer is sleeved onto the pulling mechanism through the pulling hole; S4, sleeve the limiting ring on the portion of the main rod extending out of the ceramic layer, and ensure that the limiting ring is in close contact with the outer surface of the ceramic layer before welding and fixing; S5. All the ceramic layers are installed in sequence according to the above operations to finally form a platinum channel.

[0016] Beneficial Effects The present invention uses a combination of a platinum tube and a ceramic layer, and further fixes the platinum tube and the ceramic layer through a pulling mechanism to form a platinum channel, and makes the ceramic layer and the platinum tube tightly fit and connected, thereby achieving overall strengthening of the internal platinum tube, effectively enhancing the performance and stability of the high-temperature resistant platinum channel, extending the service life of the platinum channel, and improving the quality and efficiency of the high-temperature molten glass transportation link in the glass production process.

[0017] The length of a single group of ceramic layers L 1 Need to meet: 200mm< L 1 < 700mm, the thickness h of the ceramic layer must meet the following requirements: 10mm<h<50mm, which can ensure the supporting strength of the ceramic layer to the internal platinum tube.

[0018] The cross-sectional shapes of the platinum tube include circular, elliptical and racetrack shapes. The vertical height H and horizontal width L of the platinum tube must meet the following requirements respectively: 150mm<H≤400mm, 150mm<L≤900mm. The cross-sectional shape of the platinum tube can be appropriately selected according to the actual temperature distribution and stress requirements to ensure the structural stability of the platinum channel at high temperature and the smoothness of the glass liquid transportation.

[0019] Multiple pulling mechanisms are reasonably distributed between the platinum tube and the ceramic layer, and two materials of different properties are connected by mechanical pulling. The pulling mechanism is spot welded to the surface of the platinum tube, and a welded limit ring is arranged on the outside of the ceramic layer to further fix the platinum tube and the ceramic layer, thereby ensuring the overall structural strength of the platinum channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A cross-sectional schematic diagram of a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the connection and distribution of a pulling mechanism and a platinum tube of a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a pulling mechanism of a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a pull rod with a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a pulling base with a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a ceramic layer of a high temperature resistant platinum channel reinforcement structure provided by an embodiment of the present invention; Figure 7A schematic diagram of the overall structure of a platinum channel of a high-temperature resistant platinum channel reinforcement structure provided in an embodiment of the present invention.

[0022] Explanation of the reference numerals in the figure: 1. platinum tube; 2. ceramic layer; 21. main body curved surface; 22. pulling hole; 3. pulling rod; 31. main rod; 32. welding end; 4. pulling base; 5. limiting ring; 6. expansion gap. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0024] Example 1 like Figure 1-7 As shown, an embodiment of the present invention provides a high temperature resistant platinum channel reinforcement structure, comprising a platinum tube 1 and a ceramic layer 2, wherein the platinum tube 1 and the ceramic layer 2 are fixedly connected by a pulling mechanism.

[0025] Specifically, the platinum tube 1 constitutes the core channel for glass liquid transmission, and its main component platinum wt% content is ≥75%, and other components include one or more combinations of precious metal materials such as palladium, rhodium, iridium, rhenium, tantalum, etc., and the impurity content of the entire platinum tube 1 must be strictly controlled within a wt% content of <0.05%, of which the wt% content of Fe element is <0.005%, and the wt% content of C element is <0.005%.

[0026] Furthermore, the operating temperature T of the platinum tube 1 satisfies: 1200°C<T<1700°C.

[0027] Furthermore, the platinum channel composed of the platinum tube 1 and the ceramic layer 2 can be heated to a maximum temperature T w =1700℃ operating time t≥48 months.

[0028] Specifically, the ceramic layer 2 mainly comprises Zr, Al, Si and other additives, wherein Zr is used as the main material, with a content of wt% ≥ 80%, and a maximum bearing temperature Tm ≥ 1725°C, which ensures effective support for the internal platinum tube 1 at high temperatures, reduces the impact of high temperatures on the overall structure, and extends the life of the structure.

[0029] Exemplarily, there are multiple pulling mechanisms, and the multiple pulling mechanisms are welded to the platinum tube in a spot welding manner. The pulling mechanism includes a pulling rod 3 and a pulling base 4, and the pulling rod 3 and the pulling base 4 are fixed by welding.

[0030] Specifically, the pulling rod 3 and the pulling base 4 are generally made of the same material as the platinum tube 1 , and the wall thickness is the same as or 10% thicker than the platinum tube 1 , to avoid excessive strength causing stress concentration at the connection point between the pulling mechanism and the platinum tube 1 and tearing the platinum tube 1 .

[0031] Exemplarily, the pulling rod 3 includes a main rod 31 and a welding end 32, the main rod 31 is fixedly connected to the welding end 32, the welding end 32 is welded to the pulling base 4 via welding spots, the welding spots are located on the four tentacles of the welding end 32, a limiting ring 5 is provided on the part of the main rod 31 extending out of the ceramic layer 2, the limiting ring 5 is tightly attached to the outer surface of the ceramic layer 2, the diameter range of the main rod 31 is 5mm to 10mm, the main rod 31 is a hollow tube body, the welding contact range of the welding end 32 is 225mm2 to 900mm2, and the pulling base 4 matches the welding contact of the welding end 32.

[0032] Specifically, considering the size of the welding seam, the size of the pulling base 4 is 3 mm to 5 mm larger than the tentacle range of the welding end 32 .

[0033] For example, the number of the ceramic layers 2 is multiple, and an expansion gap 6 is provided between adjacent ceramic layers 2, and the width k of the expansion gap 6 is equal to the length L of a single group of ceramic layers 2. 1 Need to satisfy: k>L 1 / 50.

[0034] Specifically, the expansion gap 6 is arranged along the glass flow direction.

[0035] Exemplarily, the ceramic layer 2 includes a main curved surface 21 and pulling holes 22, the main curved surface 21 is provided with the pulling holes 22, the main curved surface 21 is divided into two halves or four halves, the main curved surface 21 matches the outer contour of the platinum tube 1, and the pulling holes 22 are synchronized with the number and distribution position of the pulling mechanism.

[0036] Specifically, the pulling holes 22 are conveniently distributed along the curved surface and the axial direction, serving as the main passage connecting the platinum tube 1 and the ceramic layer 2 .

[0037] Exemplarily, the fitting gap c between the main curved surface 21 and the outer contour of the platinum tube 1 needs to satisfy: c≤0.5mm, the pulling hole 22 close to the inner surface of the ceramic layer 2 is a circular or square space, the pulling hole 22 away from the inner surface of the ceramic layer 2 is a circular straight hole, the pulling base 4 and the welding end 32 are built in the circular or square space, the main rod 31 passes through the circular straight hole, and the inner diameter of the circular straight hole is 4mm larger than the outer diameter of the main rod 31.

[0038] Specifically, the inner diameter of the circular straight hole is 4 mm larger than the outer diameter of the main rod 31, and has a small range of displacement to release possible expansion differences.

[0039] Specifically, the multi-point pulling mechanism between the platinum tube 1 and the ceramic layer connects the two different materials by mechanical pulling, so that the fitting gap c between the main curved surface 21 and the outer contour of the platinum tube 1 satisfies: c≤0.5mm.

[0040] For example, the cross-sectional shape of the platinum tube 1 is circular, elliptical or racetrack-shaped, the vertical height H and the horizontal width L of the platinum tube 1 need to satisfy: 150mm<H≤400mm, 150mm<L≤900mm, and the single section length L of the ceramic layer 2 is 1 Need to meet: 200mm< L 1 <700mm, the thickness h of the ceramic layer 2 needs to satisfy: 10mm<h<50mm.

[0041] Specifically, the length L of a single group of the ceramic layer 2 is 1 The setting requirements of the thickness h can ensure the supporting strength of the ceramic layer 2 to the platinum tube 1 inside.

[0042] Exemplarily, the distribution of the pulling mechanism on a single cross section of the platinum tube 1 includes: 30°, 60°, 90° equiangular distribution around the circumference or non-equiangular distribution at the upper and lower parts, and the distribution number N at the upper part is t and the number of distributions N in the lower part b Need to meet: N t ≥N b , the spacing f between adjacent sections must satisfy: 200mm<f<500mm.

[0043] Specifically, the cross-sectional shape of the platinum tube 1 is designed according to the actual temperature distribution and stress requirements, and can be selected between circular, elliptical, and racetrack shapes to ensure the stability of the platinum channel at high temperatures and the smoothness of the glass liquid transportation.

[0044] The embodiment of the present invention further provides a high temperature resistant platinum channel strengthening method, the method comprising: The platinum tube 1 and the ceramic layer 2 are fixedly connected via a pulling mechanism.

[0045] Exemplarily, the fixed connection between the platinum tube 1 and the ceramic layer 2 through a pulling mechanism includes the following steps: S1. The pulling rod 3 and the pulling base 4 are fixed by welding to form a pulling mechanism.

[0046] S2, spot welding the pulling mechanism according to the points marked on the platinum tube 1; Specifically, the welding process is mainly spot welding in order to avoid damaging the main body of the platinum tube 1 .

[0047] S3, after all the pulling mechanisms and the platinum tube 1 are welded, the ceramic layer 2 is sleeved onto the pulling mechanism through the pulling hole 22; Specifically, the assembly process can be limited by using a positioning tool, so that each pulling mechanism can safely pass through the pulling hole 22 of the ceramic layer 2.

[0048] S4, sleeve the limiting ring 5 on the portion of the main rod 31 extending out of the ceramic layer 2, and ensure that the limiting ring 5 is in close contact with the outer surface of the ceramic layer 2 before welding and fixing.

[0049] S5. Install all the ceramic layers 2 in sequence according to the above operations to finally form a platinum channel.

[0050] Through the above operations, a complete solution is formed, which further improves the strength of the platinum channel. After offline tests, the maximum operating temperature of the platinum tube 1 with the same material and structural dimensions is increased by 120°C after adopting this solution, which has a significant effect on the production of high-temperature glass. This method has been applied to some lines and is in good operating condition so far. It is expected to increase the life of the production line by about 30%. In the future, it can be used to further optimize the material usage and reduce the cost of equipment.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A high temperature resistant platinum channel reinforcement structure, characterized in that: It comprises a platinum tube (1) and a ceramic layer (2), wherein the platinum tube (1) and the ceramic layer (2) are fixedly connected via a pulling mechanism.

2. A high temperature resistant platinum channel reinforcement structure according to claim 1, characterized in that: There are a plurality of pulling mechanisms, and the plurality of pulling mechanisms are welded to the platinum tube (1) by spot welding. The pulling mechanism comprises a pulling rod (3) and a pulling base (4), and the pulling rod (3) and the pulling base (4) are fixed by welding.

3. A high temperature resistant platinum channel reinforcement structure according to claim 2, characterized in that: The pulling rod (3) comprises a main rod (31) and a welding end (32), wherein the welding end (32) comprises four tentacles, the main rod (31) is fixedly connected to the welding end (32), and the welding end (32) is welded to the pulling base (4) via welding points, wherein the welding points are located on the four tentacles of the welding end (32), a limiting ring (5) is sleeved on the portion of the main rod (31) extending out of the ceramic layer (2), and the limiting ring (5) is tightly attached to the outer surface of the ceramic layer (2), the diameter of the main rod (31) ranges from 5 mm to 10 mm, the main rod (31) is a hollow tube, and the welding contact range of the welding end (32) is 225 mm. 2 ~900mm 2 The pulling base (4) matches the welding contact of the welding end (32).

4. A high temperature resistant platinum channel reinforcement structure according to claim 1, characterized in that: The number of the ceramic layers (2) is plural, and expansion gaps (6) are provided between adjacent ceramic layers (2). The width k of the expansion gap (6) and the length L1 of a single section of the ceramic layer (2) must satisfy the following relationship: k>L1 / 50.

5. A high temperature resistant platinum channel reinforcement structure according to claim 3, characterized in that: The ceramic layer (2) comprises a main curved surface (21) and pulling holes (22); the main curved surface (21) is provided with the pulling holes (22); the main curved surface (21) is divided into two halves or four halves; the main curved surface (21) matches the outer contour of the platinum tube (1); the pulling holes (22) are synchronized in number and distribution position with the pulling mechanism.

6. A high temperature resistant platinum channel reinforcement structure according to claim 5, characterized in that: The fitting gap c between the main body curved surface (21) and the outer contour of the platinum tube (1) must satisfy the following requirement: c≤0.5 mm; the pulling hole (22) close to the inner surface of the ceramic layer (2) is a circular or square space; the pulling hole (22) away from the inner surface of the ceramic layer (2) is a circular straight hole; the pulling base (4) and the welding end (32) are built into the circular or square space; the main rod (31) passes through the circular straight hole; and the inner diameter of the circular straight hole is 4 mm larger than the outer diameter of the main rod (31).

7. A high temperature resistant platinum channel reinforcement structure according to claim 1, characterized in that: The cross-sectional shape of the platinum tube (1) is circular, elliptical or racetrack-shaped. The vertical height H and horizontal width L of the platinum tube (1) must satisfy the following conditions: 150 mm < H ≤ 400 mm, 150 mm < L ≤ 900 mm, respectively. The single-section length L1 of the ceramic layer (2) must satisfy the following conditions: 200 mm < L1 < 700 mm. The thickness h of the ceramic layer (2) must satisfy the following conditions: 10 mm < h < 50 mm.

8. The high temperature resistant platinum channel reinforcement structure according to claim 1, characterized in that: The distribution of the pulling mechanism on a single cross section of the platinum tube (1) includes: 30°, 60°, 90° equiangular distribution around the circumference or non-equiangular distribution at the upper and lower parts, wherein the upper distribution number N t and the number of distributions N in the lower part b Need to meet: N t ≥N b , the spacing f between adjacent sections must satisfy: 200mm<f<500mm.

9. A high temperature resistant platinum channel strengthening method, characterized in that: Using a high temperature resistant platinum channel reinforcement structure as described in any one of claims 1 to 8, the method comprises: The platinum tube (1) and the ceramic layer (2) are fixedly connected via a pulling mechanism.

10. A high temperature resistant platinum channel strengthening method according to claim 9, characterized in that: The process of fixedly connecting the platinum tube (1) and the ceramic layer (2) by means of a pulling mechanism comprises the following steps: The pulling rod (3) and the pulling base (4) are fixed by welding to form a pulling mechanism; Welding the pulling mechanism by spot welding according to the points marked on the platinum tube (1); After all the pulling mechanisms and the platinum tube (1) are welded, the ceramic layer (2) is sleeved onto the pulling mechanism through the pulling hole (22); The limiting ring (5) is sleeved on the portion of the main rod (31) extending out of the ceramic layer (2), and the limiting ring (5) is ensured to be in close contact with the outer surface of the ceramic layer (2), and then welded and fixed; All the ceramic layers (2) are installed in sequence according to the above-mentioned operation to finally form a platinum channel.

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