Tundish nozzle convenient to disassemble and assemble

Abstract

The tundish water gap convenient to disassemble and assemble comprises a base, a water gap body and a protective sleeve, the water gap body is fixedly installed above the base, an insertion block is fixedly connected to the lower portion of a second installation plate, an insertion groove is formed in the contact position of a first installation plate and the insertion block, and the insertion groove is fixedly connected to the lower portion of a second installation plate. A fixing plate is fixedly mounted at the top of the second mounting plate, a locking rod is arranged on the fixing plate, a locking block is arranged at the position, corresponding to the locking rod, of the bottom end of the first mounting plate, and a protective sleeve is fixedly mounted below the second mounting plate. Through the arrangement of the protective sleeve, the protective sleeve is arranged in the molten steel channel of the nozzle body, so that molten steel directly circulates in the protective sleeve, and the protective sleeve can effectively isolate the molten steel from being in contact with the inner wall of the nozzle body, so that the erosion of the molten steel to the inner wall of the nozzle body can be reduced; and the abrasion and replacement frequency of the nozzle body can be reduced, so that the service life of the tundish nozzle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tundish nozzles, and particularly relates to a tundish nozzle which is convenient for disassembly and assembly. Background Technique

[0002] The tundish nozzle is one of the important components in the continuous casting process. It is usually installed between the tundish and the mold, serving as the passage for molten steel to enter the mold from the tundish. Its main function is to protect the molten steel from secondary oxidation, prevent steel slag from mixing into the molten steel, and enable the molten steel to have a stable flow and reasonable temperature in the mold. The tundish nozzle not only plays a role in protecting the molten steel, but also involves the control of the temperature, composition and purity of the molten steel, so as to ensure the balanced progress of continuous casting.

[0003] When the existing tundish nozzle is filled with molten steel, the inner wall of the tundish nozzle is directly in contact with the molten steel. Some components contained in the molten steel may erode the nozzle material. Therefore, the molten steel will scour and wear the inner wall of the nozzle during the flowing process, resulting in premature damage of the nozzle. For example, a tundish upper nozzle disclosed in the patent with the publication number CN207857846U. Although corrosion-resistant materials such as calcium zirconate are used on the inner wall in this patent, when it is in direct contact with the molten steel for a long time or under high-temperature conditions, there is still a risk of being eroded. Once the coating is damaged, maintenance and replacement are relatively difficult, and the entire nozzle needs to be disassembled and re-coated, which not only increases the maintenance cost but also may affect the production progress.

[0004] Therefore, it is very necessary to invent a tundish nozzle which is convenient for disassembly and assembly to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a tundish nozzle which is convenient for disassembly and assembly to solve the problem of inconvenient disassembly and replacement in the technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: a tundish nozzle which is convenient for disassembly and assembly, comprising a base, a nozzle body and a protective sleeve. The nozzle body is fixedly installed above the base. A molten steel passage is opened inside the nozzle body. A first mounting plate is fixedly installed at the top of the nozzle body. A second mounting plate is arranged above the first mounting plate. A molten steel inlet is opened at the center of the top of the second mounting plate. A sealing ring is fixedly installed at the bottom of the second mounting plate. An insertion block is fixedly connected below the second mounting plate. A slot is opened at the contact position between the first mounting plate and the insertion block. A fixing plate is fixedly installed at the top of the second mounting plate. A locking rod is arranged on the fixing plate. A locking block is arranged at the corresponding position of the bottom end of the first mounting plate for the locking rod. A protective sleeve is fixedly installed below the second mounting plate.

[0007] Preferably, the first mounting plate and the second mounting plate are designed with the same structure, and the first mounting plate and the second mounting plate are parallel to each other, so that the first mounting plate can be stably mounted on the second mounting plate.

[0008] Preferably, a sealing ring is provided at the connection between the first mounting plate and the second mounting plate. The sealing ring is made of rubber material, so that the sealing ring can improve the sealing performance at the connection between the first mounting plate and the second mounting plate.

[0009] Preferably, the insertion block and the insertion slot are in snap connection, and the insertion block and the insertion slot are matched with each other. There are multiple insertion blocks and insertion slots, and the multiple insertion blocks and insertion slots are evenly distributed in a circular array, so that the insertion block and the insertion slot can realize the rapid, accurate and stable connection between the two first mounting plates and the second mounting plate.

[0010] Preferably, the fixed plate and the head end of the locking rod are hinged, and the end of the locking rod is arranged on the locking block, so that the locking rod can rotate relative to the fixed plate within a certain range, and thus the locking rod can cooperate with or separate from the locking block flexibly.

[0011] Preferably, there are 4 locking rods and locking blocks, and the locking rods and the locking blocks are matched with each other, so that the locking rods and the locking blocks can limit and fix the installation of the first mounting plate and the second mounting plate, thereby ensuring the stability of the installation of the protective sleeve.

[0012] Preferably, the protective sleeve is arranged inside the nozzle body, and the outer wall of the protective sleeve is in close contact with the inner wall of the nozzle body, so that the protective sleeve can prevent the molten steel from directly contacting the inner wall of the nozzle body, effectively improving the service life of the nozzle body.

[0013] Preferably, an erosion-resistant layer and an anti-oxidation layer are provided on the inner wall of the protective sleeve. The erosion-resistant layer is a zirconia coating coated on the inner surface of the protective sleeve, and the anti-oxidation layer is an anti-oxidation coating coated on the surface of the erosion-resistant layer, so that the erosion-resistant layer and the anti-oxidation layer can improve the erosion-resistant and anti-oxidation performance of the protective sleeve, effectively improving the service life of the protective sleeve.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0015] 1. Through the setting of the protective sleeve, the protective sleeve is arranged inside the molten steel passage of the nozzle body, so that the molten steel directly flows inside the protective sleeve. The protective sleeve can effectively isolate the contact between the molten steel and the inner wall of the nozzle body, which can not only reduce the erosion of the molten steel on the inner wall of the nozzle body, but also reduce the wear and replacement frequency of the nozzle body, thereby prolonging the service life of the tundish nozzle;

[0016] 2. Through the settings of the insertion block, slot, locking rod and locking block, through the docking of the insertion block and the slot, and the locking of the locking rod and the locking block, the installation of the casing can be completed quickly. Similarly, when disassembling, only the locking of the locking rod and the locking block needs to be released, and then the insertion block can be pulled out of the slot. This design of quick disassembly and assembly can greatly reduce the maintenance time. At the same time, since the protective casing can be disassembled, assembled and replaced separately, there is no need to replace the entire water inlet, which greatly reduces the maintenance cost. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is an exploded three-dimensional structure diagram of the water inlet body and the protective casing of the present utility model;

[0019] Figure 3 is a three-dimensional structure diagram of the sealing ring and the insertion block of the present utility model;

[0020] Figure 4 is a sectional three-dimensional structure diagram of the water inlet body of the present utility model;

[0021] Figure 5 is a sectional three-dimensional structure diagram of the protective casing of the present utility model;

[0022] Figure 6 For the present utility model Figure 5 is an enlarged three-dimensional structure diagram at position A in.

[0023] Description of the Reference Numerals in the Drawings:

[0024] 1. Base; 2. Water inlet body; 3. Molten steel channel; 4. First mounting plate; 5. Second mounting plate; 6. Molten steel inlet; 7. Sealing ring; 8. Insertion block; 9. Slot; 10. Fixed plate; 11. Locking rod; 12. Locking block; 13. Protective casing; 14. Erosion-proof layer; 15. Oxidation-proof layer. Detailed Embodiment

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings.

[0026] The present utility model provides as Figures 1-6An intermediate ladle nozzle that is convenient for disassembly and assembly is shown, including a base 1. Above the base 1, a nozzle body 2 is fixedly installed. Inside the nozzle body 2, a molten steel channel 3 is opened. At the top of the nozzle body 2, a first mounting plate 4 is fixedly installed. Above the first mounting plate 4, a second mounting plate 5 is provided. At the center of the top of the second mounting plate 5, a molten steel inlet 6 is opened. At the bottom of the second mounting plate 5, a sealing ring 7 is fixedly installed. Below the second mounting plate 5, a plug 8 is fixedly connected. At the contact position between the first mounting plate 4 and the plug 8, a slot 9 is opened. At the top of the second mounting plate 5, a fixing plate 10 is fixedly installed. On the fixing plate 10, a locking rod 11 is provided. At the position corresponding to the locking rod 11 at the bottom end of the first mounting plate 4, a locking block 12 is provided. Below the second mounting plate 5, a protective sleeve 13 is fixedly installed.

[0027] The first mounting plate 4 and the second mounting plate 5 have the same structural design. The first mounting plate 4 and the second mounting plate 5 are parallel to each other. At the connection between the first mounting plate 4 and the second mounting plate 5, a sealing ring 7 is provided. The sealing ring 7 is made of rubber material. The plug 8 and the slot 9 are in a snap-fit connection. The plug 8 and the slot 9 cooperate with each other. There are multiple plugs 8 and slots 9, and the multiple plugs 8 and slots 9 are evenly distributed in a circular array. The fixing plate 10 and the first end of the locking rod 11 are hinged. The end of the locking rod 11 is arranged on the locking block 12. There are 4 locking rods 11 and locking blocks 12, and the locking rods 11 and the locking blocks 12 cooperate with each other. The protective sleeve 13 is arranged inside the nozzle body 2. The outer wall of the protective sleeve 13 fits closely with the inner wall of the nozzle body 2. On the inner wall of the protective sleeve 13, an anti-erosion layer 14 and an anti-oxidation layer 15 are provided. The anti-erosion layer 14 is a zirconia coating applied on the inner surface of the protective sleeve 13, and the anti-oxidation layer 15 is an anti-oxidation coating applied on the surface of the anti-erosion layer 14.

[0028] The provided plug 8 is accurately inserted and snapped into the corresponding slot 9, thereby ensuring that the protective sleeve 13 is exactly sleeved inside the nozzle body 2. And the provided locking rods 11 and locking blocks 12 can lock and fix the first mounting plate 4 and the second mounting plate 5, thereby ensuring the stability of the protective sleeve 13 inside the nozzle body 2. And the provided protective sleeve 13 can provide a protective effect for the nozzle body 2, which can effectively isolate the direct contact between the molten steel and the inner wall of the nozzle body 2, reducing the erosion risk. At the same time, the anti-erosion layer 14 coated inside the protective sleeve 13 can effectively resist the erosion of high-temperature liquids such as molten steel on the inner wall of the protective sleeve 13, while the anti-oxidation layer 15 can prevent the protective sleeve 13 from undergoing an oxidation reaction in a high-temperature environment, thereby extending the service life of the protective sleeve 13. Finally, the detachable protective sleeve 13 greatly simplifies the maintenance and replacement process and reduces the maintenance cost.

[0029] The working principle of the present utility model:

[0030] Refer to the attached drawings of the specification Figures 1-3, when using the present utility model, first, the protective sleeve 13 is sleeved on the molten steel passage 3 inside the nozzle body 2, so that the insertion block 8 at the bottom of the second mounting plate 5 is aligned with the slot 9 above the first mounting plate 4 for plug-in connection. Then, the four locking rods 11 are respectively stuck on the locking blocks 12, thereby locking the installation of the first mounting plate 4 and the second mounting plate 5, ensuring the stability of the protective sleeve 13 installed inside the nozzle body 2. Finally, the nozzle body 2 can be installed at a suitable position through the base 1 with screws. After the nozzle body 2 is installed, the molten steel can flow into the mold through the molten steel inlet 6 opened in the middle of the protective sleeve 13. Thus, the protective sleeve 13 can effectively isolate the contact between the molten steel and the inner wall of the nozzle body 2, reduce the erosion of the inner wall of the nozzle body 2 by the molten steel, and reduce the wear and replacement frequency of the nozzle body 2;

[0031] Refer to the attached drawings of the specification Figures 4-6 , when using the present utility model, the protective sleeve 13 is designed as a detachable structure, which is more convenient for disassembly, replacement or maintenance. It not only improves the efficiency, reduces the maintenance cost, but also enhances the safety and stability of the use of the nozzle body 2. Moreover, the zirconia coating as the erosion prevention layer 14 can effectively resist the erosion of the inner wall of the protective sleeve 13 by high-temperature liquids such as molten steel, and prolong the service life of the protective sleeve 13. The anti-oxidation layer 15 can prevent the protective sleeve 13 from undergoing an oxidation reaction in a high-temperature environment, thereby maintaining the stable performance of the protective sleeve 13. Thus, the double-layer coating structure of the erosion prevention layer 14 and the anti-oxidation layer 15 can better adapt to the high-temperature and highly corrosive working environment, can resist erosion and prevent oxidation, so as to comprehensively improve the protection performance of the protective sleeve 13.

Claims

1. A tundish nozzle that is easy to disassemble and assemble, comprising a base (1), a nozzle body (2) and a protective sleeve (13), characterized in that: A nozzle body (2) is fixedly mounted above the base (1), a molten steel channel (3) is provided inside the nozzle body (2), a No. 1 mounting plate (4) is fixedly mounted on the top of the nozzle body (2), a No. 2 mounting plate (5) is provided above the No. 1 mounting plate (4), a molten steel inlet (6) is provided at the top center of the No. 2 mounting plate (5), a sealing ring (7) is fixedly mounted at the bottom of the No. 2 mounting plate (5), an insert block (8) is fixedly connected below the No. 2 mounting plate (5), a slot (9) is provided at the contact position between the No. 1 mounting plate (4) and the insert block (8), a fixing plate (10) is fixedly mounted on the top of the No. 2 mounting plate (5), a locking rod (11) is provided on the fixing plate (10), a locking block (12) is provided at the position of the bottom end of the No. 1 mounting plate (4) corresponding to the locking rod (11), and a protective sleeve (13) is fixedly mounted below the No. 2 mounting plate (5).

2. The tundish nozzle that is easy to disassemble and assemble according to claim 1, characterized in that: The first mounting plate (4) and the second mounting plate (5) have the same structural design, and the first mounting plate (4) and the second mounting plate (5) are parallel to each other.

3. The tundish nozzle that is easy to disassemble and assemble according to claim 2, characterized in that: A sealing ring (7) is provided at the connection between the first mounting plate (4) and the second mounting plate (5), and the sealing ring (7) is made of rubber material.

4. The tundish nozzle that is easy to disassemble and assemble according to claim 1, characterized in that: The plug block (8) and the slot (9) are connected in a snap-fitting manner, the plug block (8) and the slot (9) cooperate with each other, a plurality of the plug blocks (8) and the slot (9) are provided, and the plurality of the plug blocks (8) and the slot (9) are evenly distributed in a circular array.

5. The tundish nozzle that is easy to disassemble and assemble according to claim 1, characterized in that: The fixing plate (10) is hingedly connected to the front end of the locking rod (11), and the rear end of the locking rod (11) is arranged on the locking block (12).

6. The tundish nozzle that is easy to disassemble and assemble according to claim 5, characterized in that: Four locking rods (11) and four locking blocks (12) are provided, and the locking rods (11) and the locking blocks (12) are matched with each other.

7. The tundish nozzle that is easy to disassemble and assemble according to claim 1, characterized in that: The protective sleeve (13) is arranged inside the nozzle body (2), and the outer wall of the protective sleeve (13) is in contact with the inner wall of the nozzle body (2).

8. The tundish nozzle that is easy to disassemble and assemble according to claim 7, characterized in that: The inner wall of the protective sleeve (13) is provided with an anti-corrosion layer (14) and an anti-oxidation layer (15); the anti-corrosion layer (14) is a zirconium oxide coating applied on the inner wall of the protective sleeve (13); and the anti-oxidation layer (15) is an anti-oxidation coating applied on the surface of the anti-corrosion layer (14).

Images