Gas supply device for preventing air source connection error of continuous casting slab tundish

Abstract

This utility model discloses a gas supply device for preventing incorrect connection of gas sources in the tundish of continuously cast slabs, relating to the field of steel continuous casting technology. A spring 1 and a spring 2 are respectively installed on both sides of the quick-change mechanism between the end and the outlet. Both springs are mounted on the quick-change mechanism. An argon gas interface is located at the upper end of the quick-change mechanism, connected to an argon gas pipeline. A compressed air interface 1, connected to spring 1, and a compressed air interface 2, connected to spring 2, are located at the lower end of the quick-change mechanism. Compressed air interface 1 is connected to compressed air pipeline 1, and compressed air interface 2 is connected to compressed air pipeline 2. The other ends of compressed air pipelines 1 and 2 converge and connect to a main compressed air pipeline. The orifice sizes of the two compressed air interfaces are identical but different from the orifice size of the argon gas interface. This utility model clearly distinguishes the interfaces and pipelines of the two gas sources in the tundish quick-change mechanism, thus solving the problem of easy incorrect connection of gas sources in the tundish quick-change mechanism.

Description

Technical Field

[0001] This utility model relates to the field of steel continuous casting technology, and in particular to an air supply device for a quick-change mechanism for the gas source of a continuous casting slab tundish. Background Technology

[0002] In modern steel continuous casting production, the tundish plays a crucial role. It is the core transition device connecting the ladle and the crystallizer, and plays a decisive role in the smooth progress of continuous casting operations and the guarantee of billet quality.

[0003] Functionally, the tundish primarily serves as a buffer container for molten steel, receiving the high-temperature molten steel poured from the ladle. During the molten steel pouring process, it effectively mitigates the impact of the steel flow, stabilizes the flow state of the molten steel, and ensures that the liquid level in the crystallizer remains stable. This function is crucial for preventing undesirable phenomena such as slag entrapment, as slag entrapment severely affects the surface quality of the cast billet, leading to defects and reducing the product yield.

[0004] Meanwhile, the tundish also provides the necessary operational buffer time for ladle replacement, making multi-heat continuous casting possible. Multi-heat continuous casting can not only significantly improve the efficiency of continuous casting operations and reduce downtime during production, but also reduce production costs and increase production efficiency.

[0005] With the continuous development of continuous casting technology, the functions of modern tundishes have been continuously expanded and optimized. In addition to the basic functions mentioned above, it also possesses extended functions such as protective casting and metallurgical fine-tuning. The realization of these functions means that the comprehensive performance of the tundish directly affects the surface quality, internal structure of the cast billet, and the production stability of the continuous casting machine. Therefore, the tundish is undoubtedly an indispensable core piece of equipment in the continuous casting process.

[0006] The inlet and outlet of the tundish are fixed by a quick-change mechanism, which is equipped with three air pipes and two types of air sources, requiring external connection to three connectors. The two air sources are compressed air for cooling the quick-change mechanism and argon gas for the inlet of the tundish.

[0007] However, in actual operation, accurately connecting the three gas pipes and two gas sources to the three connectors is not easy, and incorrect connections are very common. Such incorrect connections can lead to a series of serious problems. Firstly, if the compressed air and argon are connected incorrectly, the quick-change mechanism will malfunction. The main function of compressed air is to cool the springs on the quick-change mechanism, preventing them from failing under high temperatures. If the springs fail due to insufficient cooling, it will affect the normal opening and closing of the quick-change mechanism, consequently affecting the replacement of the tundish's top and bottom nozzles, leading to production interruptions. Secondly, argon is used for blowing argon at the top nozzle to prevent inclusions from accumulating there. If the argon connection is incorrect or insufficient, inclusions will accumulate at the top nozzle, not only clogging it and affecting the normal flow of molten steel, but also causing inclusion defects in the cast billet, severely impacting the billet's quality.

[0008] Currently, there is no effective solution to the problem of incorrect gas supply connection in the quick-change mechanism of the tundish. In actual production, the experience and carelessness of the operators are mainly relied upon to avoid incorrect gas supply connection, but this method has a high degree of uncertainty and cannot fundamentally solve the problem. Once the operator is negligent, the gas supply may be connected incorrectly, leading to production accidents and quality problems.

[0009] Therefore, developing an air supply device that can effectively solve the problem of easy misconnection of air source in the quick-change mechanism of tundish is of great practical significance for improving the stability of continuous casting production and ensuring the quality of cast billets. Summary of the Invention

[0010] This utility model provides an air supply device to prevent incorrect connection of the gas source in the tundish of continuously cast slabs. The air supply device clearly distinguishes the interfaces and pipes of the two gas sources in the tundish quick-change mechanism, thereby solving the problem of easy incorrect connection of the gas source in the tundish quick-change mechanism.

[0011] To solve the above problems, the technical solution adopted by this utility model is:

[0012] The continuous casting slab tundish includes an upper inlet and a lower inlet, which are fixedly connected by a quick-change mechanism. A spring 1 and a spring 2 are respectively installed on both sides of the quick-change mechanism between the upper and lower inlets. The upper end of the quick-change mechanism has an argon gas interface connected to an argon gas pipeline. The lower end of the quick-change mechanism has a compressed air interface 1 connected to the spring 1 and a compressed air interface 2 connected to the spring 2. Compressed air interface 1 is connected to a compressed air pipeline 1, and compressed air interface 2 is connected to a compressed air pipeline 2. The other ends of compressed air pipeline 1 and compressed air pipeline 2 merge and connect to a main compressed air pipeline. The orifice sizes of compressed air interface 1 and compressed air interface 2 are the same, while the orifice size of the argon gas interface is different from that of compressed air interface 1 and compressed air interface 2.

[0013] In the above technical solution, a more specific technical solution could be that the diameter of both the compressed air interface one and the compressed air interface two is 15mm.

[0014] Furthermore, the aperture of the argon gas interface is 8mm.

[0015] Furthermore, the argon gas pipeline, the first compressed air pipeline, the second compressed air pipeline, and the main compressed air pipeline are all rubber hoses.

[0016] Furthermore, spring one and spring two are symmetrically mounted on both sides of the quick-change mechanism.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0018] This invention differentiates the interfaces by using a unique orifice design: the orifice of the argon gas interface is set to a different size than that of compressed air interface one and compressed air interface two (for example, the orifice of the argon gas interface is 8mm, while the orifices of compressed air interface one and compressed air interface two are both 15mm). This significant size difference allows operators to intuitively, quickly, and accurately distinguish between the argon gas interface and the compressed air interface, effectively avoiding incorrect connection problems caused by interface confusion. Simultaneously, the pipeline layout is optimized for easier pipeline differentiation: the other ends of compressed air pipeline one and compressed air pipeline two, which are respectively connected to compressed air interface one and compressed air interface two, are merged and connected to the main compressed air pipeline, forming a unique pipeline layout. This design makes the compressed air pipeline and argon gas pipeline clearly distinguishable in appearance and connection method, allowing operators to easily identify the compressed air pipeline and argon gas pipeline, further reducing the possibility of incorrect gas source connection. This effectively solves the problem of easy incorrect gas source connection in the intermediate package quick-change mechanism, ensuring the stability and safety of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model after the drain outlet has been removed.

[0021] Figure 3 This is a top view of the present invention.

[0022] Figures 1-3 In the diagram, the following numbers are marked: 1 - tundish for continuous casting slab, 1-1 - inlet, 1-2 - outlet, 2 - quick change mechanism, 3 - spring one, 4 - spring two, 5 - argon gas interface, 6 - argon gas pipeline, 7 - compressed air interface one, 8 - compressed air interface two, 9 - compressed air pipeline one, 10 - compressed air pipeline two, 11 - main compressed air pipeline. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings: Example

[0024] like Figure 1-3 The invention relates to an air supply device for preventing incorrect connection of the air source in the tundish of a continuous casting slab. The tundish 1 of the continuous casting slab includes an upper water inlet 1-1 and a lower water inlet 1-2. The upper water inlet 1-1 and the lower water inlet 1-2 are fixedly connected by a quick-change mechanism 2. Spring 1 3 and spring 2 4 are respectively provided on both sides of the quick-change mechanism 2 and between the lower water inlet 1-2. Both spring 1 3 and spring 2 4 are installed on the quick-change mechanism 2.

[0025] The upper end of the quick-change mechanism 2 is equipped with an argon gas interface 5, which is connected to an argon gas pipeline 6. The lower end of the quick-change mechanism 2 is equipped with a compressed air interface 7 connected to spring 3 and a compressed air interface 8 connected to spring 4. Compressed air interface 7 is connected to a compressed air pipeline 9, and compressed air interface 8 is connected to a compressed air pipeline 10. The other ends of compressed air pipelines 9 and 10 merge and connect to the main compressed air pipeline 11. This design optimizes the pipeline layout for the two gas sources, making them easier to distinguish: the other ends of compressed air pipelines 9 and 10, which are respectively connected to compressed air interface 7 and 8, merge and connect to the main compressed air pipeline 11, forming a unique pipeline layout. This design makes the compressed air pipeline and the argon gas pipeline clearly distinguishable in appearance and connection method, allowing operators to easily identify them and reducing the possibility of incorrect gas source connection. This effectively solves the problem of easy incorrect gas source connection in the intermediate container quick-change mechanism, ensuring the stability and safety of equipment operation.

[0026] Meanwhile, the orifice sizes of compressed air interface 7 and compressed air interface 8 are the same, while the orifice size of argon interface 5 is different from that of compressed air interface 7 and compressed air interface 8. This differentiated design of the orifice sizes of the two gas sources facilitates interface differentiation: the orifice size of argon interface 5 is set to a different size than that of compressed air interface 7 and compressed air interface 8. This significant size difference allows operators to intuitively, quickly, and accurately distinguish between the argon interface and the compressed air interface, effectively avoiding incorrect connection problems caused by interface confusion.

[0027] Based on the above technical solution, preferably, the diameters of both compressed air interface 7 and compressed air interface 8 can be set to 15mm.

[0028] Alternatively, the aperture of the argon gas interface 5 can be set to 8mm.

[0029] Preferably, the argon gas pipeline 6, compressed air pipeline 9, compressed air pipeline 10, and main compressed air pipeline 11 can all be installed as rubber hoses. The use of rubber hoses offers several advantages. First, they better adapt to complex installation environments: in the actual application scenarios of continuous casting slab tundishes, equipment layouts can be complex, with various space constraints and obstacles. Rubber hoses, with their excellent flexibility, can easily bend and bypass these obstacles, facilitating installation and layout without the need for complex cutting, welding, or custom processing like rigid pipes, significantly reducing installation difficulty and cost. Second, they facilitate adjustment and maintenance: during equipment operation, some adjustments or maintenance operations may be required on the pipelines. The flexibility of rubber hoses allows operators to easily move, disassemble, or reconnect the pipelines without damaging them, improving maintenance efficiency and reducing downtime.

[0030] Preferably, spring 3 and spring 4 can be symmetrically installed on both sides of the quick-change mechanism 2. This design can apply equal and opposite forces to both sides of the quick-change mechanism, so that the quick-change mechanism is subjected to uniform force and avoids tilting, deformation or damage caused by excessive force on one side, thereby ensuring that the quick-change mechanism can operate stably and reliably.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gas supply device for preventing incorrect connection of the gas source to the tundish of a continuously cast slab, wherein the tundish includes an upper inlet and a lower inlet, the upper inlet and the lower inlet being fixedly connected by a quick-change mechanism, and springs one and two are respectively provided on both sides of the quick-change mechanism between the upper inlet and the lower inlet, both springs one and two being mounted on the quick-change mechanism, characterized in that: The quick-change mechanism has an argon gas interface at its upper end, which is connected to an argon gas pipeline. The quick-change mechanism also has a compressed air interface 1 connected to the first spring and a compressed air interface 2 connected to the second spring. The first compressed air interface is connected to a first compressed air pipeline, and the second compressed air interface is connected to a second compressed air pipeline. The other ends of the first and second compressed air pipelines converge and connect to a main compressed air pipeline. The diameters of the first and second compressed air interfaces are the same, while the diameter of the argon gas interface is different from the diameters of the first and second compressed air interfaces.

2. The gas supply device for preventing incorrect connection of the gas source to the tundish of continuously cast slabs according to claim 1, characterized in that: The diameter of both the compressed air interface one and the compressed air interface two is 15mm.

3. The gas supply device for preventing incorrect connection of the gas source in the tundish of continuously cast slabs according to claim 1 or 2, characterized in that: The argon gas interface has an aperture of 8 mm.

4. The gas supply device for preventing incorrect connection of the gas source to the tundish of continuously cast slabs according to claim 3, characterized in that: The argon gas pipeline, the first compressed air pipeline, the second compressed air pipeline, and the main compressed air pipeline are all rubber hoses.

5. The gas supply device for preventing incorrect connection of the gas source to the tundish of continuously cast slabs according to claim 4, characterized in that: Spring one and spring two are symmetrically installed on both sides of the quick-change mechanism.

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