Adjusting structure and novel continuous casting square billet tundish efficient baking nozzle

Abstract

The utility model discloses an adjusting structure and a novel high-efficiency baking nozzle for a continuous casting square billet tundish, which comprise a fixing component, a spray pipe and a mixing tank arranged on the outer wall of the spray pipe, and the mounting assembly is arranged at the bottom of the fixing assembly and comprises a lengthening pipe and a first flange plate arranged at the top of the lengthening pipe. By lengthening the spray pipe and additionally arranging the lengthening pipe, gas can enter the spray pipe better, so that when the gas is ignited, the gas can be burnt earlier, the time for flame to reach the specified temperature is shortened, the baking time of the mixing tank can be shortened, the utilization rate of energy is increased, and meanwhile the service life of the mixing tank can be prolonged.

Description

An adjustment structure and a novel high-efficiency baking nozzle for continuous casting billet tundish Technical Field

[0001] This utility model relates to the field of high-efficiency baking nozzles for tundishes in continuous casting of square billets, and in particular to an adjustment structure and a novel high-efficiency baking nozzle for tundishes in continuous casting of square billets. Background Technology

[0002] The tundish is a crucial link in the continuous casting process, playing a vital role in storing molten steel, distributing the steel flow, and stabilizing the cast flow. It is also an important site for metallurgically purifying the molten steel and is essential for continuous casting. Therefore, ensuring the normal and stable use of the tundish is of great significance. Among these factors, the effective preheating of the tundish before use is a key factor in the successful start-up and stable production of the continuous casting machine.

[0003] To improve the quality of hardened steel in billets, a low-superheat start-up operation is implemented, which places higher demands on the baking of the tundish. According to regulations, the temperature of the tundish must reach above 1200℃ when baking stops. Currently, the only way to meet this requirement is to extend the baking time of the tundish. Typically, the baking time of the casting machine's tundish needs to be controlled between 6 and 6.5 hours to ensure that the temperature reaches 1200℃ when the tundish is shut down.

[0004] However, prolonged baking also brings a series of problems. On the one hand, energy waste is quite serious; on the other hand, the lifespan of the tundish knotted bale cap is significantly affected. During the long baking process, the steel structure of the knotted bale cap deforms due to heat, causing the coating around the baking holes to peel off, and even leading to several cap collapses. Currently, the average lifespan of the knotted bale cap is only about 5 bales, which not only significantly impacts production stability but also poses a challenge to cost control. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this utility model is to provide a structure in which the length of the baking nozzle tube can be increased according to the needs.

[0006] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes an adjustment structure, which includes,

[0007] The connecting assembly includes a telescopic member, a connecting member disposed on the inner wall of the telescopic member, and a rotating member disposed on the outer wall of the telescopic member.

[0008] In a preferred embodiment of the adjustment structure of this utility model: the telescopic member includes an extension tube, a sliding groove disposed on the inner wall of the extension tube, a convex ring disposed on the outer wall of the extension tube, a through hole disposed on the inner wall of the extension tube and located below the sliding groove, and an inclined groove disposed on the inner wall of the extension tube and located below the through hole.

[0009] In a preferred embodiment of the adjustment structure of this utility model: the connecting member includes a connecting pipe, a first limiting ring disposed at the top end of the connecting pipe, and a second limiting ring disposed at the bottom end of the connecting pipe.

[0010] In a preferred embodiment of the adjustment structure of this utility model: the outer wall of the second limiting ring is slidably connected to the inner wall of the sliding groove, the top and bottom diameters of the sliding groove are both smaller than the diameter of the second limiting ring, and the top of the extension tube is slidably connected to the outer wall of the connecting tube.

[0011] In a preferred embodiment of the adjustment structure of this utility model: the rotating component includes a sleeve and a nut disposed on the outer wall of the sleeve.

[0012] In a preferred embodiment of the adjustment structure of this utility model: the sleeve is fitted onto the outer wall of the convex ring, and the inner wall of the sleeve is rotatably connected to the outer wall of the extension tube.

[0013] The beneficial effects of this utility model are as follows: rotating the sleeve downwards causes the sleeve to move downwards on the extension tube, thereby driving the extension tube to move downwards, increasing the length of the extension tube and the connecting tube. This method can be used to freely extend the length of the bottom of the nozzle, thereby controlling the ignition point of the gas. In this way, different effects can be achieved by controlling the ignition point of the gas under different circumstances.

[0014] The technical problem to be solved by this utility model is to provide a device for changing the design structure of the nozzle of an intermediate bread baker.

[0015] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a novel high-efficiency baking nozzle for the tundish of continuously cast square billets, which includes,

[0016] The fixed assembly includes a nozzle, a mixing tank disposed on the outer wall of the nozzle; and,

[0017] The mounting assembly, located at the bottom of the fixing assembly, includes an extension tube and a first flange located at the top of the extension tube.

[0018] In a preferred embodiment of the novel high-efficiency baking nozzle for continuous casting billet tundish of this utility model: a second flange is provided at the bottom of the nozzle, and the second flange is connected to the first flange by bolts.

[0019] In a preferred embodiment of the novel high-efficiency baking nozzle for continuous casting billet tundish of this utility model: a connecting pipe is provided on one side of the mixing tank, and a top cover is provided on the top of the mixing tank.

[0020] In a preferred embodiment of the novel high-efficiency baking nozzle for continuous casting billet tundish of this utility model: the inner wall of the top cover is connected to the outer wall of the nozzle.

[0021] The beneficial effects of this utility model are as follows: by lengthening the nozzle and adding an extension pipe, more gas can enter the nozzle, so that the gas can burn earlier when it is ignited, thereby reducing the time it takes for the flame to reach the specified temperature. This reduces the baking time of the mixing tank, thereby improving energy utilization and increasing the service life of the mixing tank. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0023] Figure 1 shows the overall structural diagram;

[0024] Figure 2 shows a structural diagram of the connecting components;

[0025] Figure 3 shows a cross-sectional view of the connecting component;

[0026] Figure 4 shows the connection diagram of the fixing component and the mounting component;

[0027] Figure 5 shows a cross-sectional view of the fixing assembly and the mounting assembly;

[0028] Figure 6 shows a cross-sectional view of the mounting components and the connecting components. Detailed Implementation

[0029] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0031] Referring to Figures 4-6, this embodiment provides a novel high-efficiency baking nozzle for continuous casting billet tundishes, comprising:

[0032] The fixed assembly 200 includes a nozzle 201 and a mixing tank 202 disposed on the outer wall of the nozzle 201; and the mounting assembly 300 is disposed at the bottom of the fixed assembly 200, including an extension pipe 301 and a first flange 302 disposed on the top of the extension pipe 301, wherein the nozzle 201 is a gas burner pipe built into the nozzle, and its main function is to transport gas.

[0033] The mixing tank 202 is an intermediate tank, whose main function is to supply compressed air into the nozzle 201. When the compressed air enters the nozzle 201, it will mix with the gas. After ignition by an external ignition device, the gas and compressed air will mix and burn in the nozzle 201, and finally be sprayed out through the outlet at the top of the nozzle 201.

[0034] Unlike the traditional nozzle 201, which only inserts into the mixing tank 202 without extending its bottom out, the improved nozzle 201 has an extended pipe 301 at its bottom, increasing its overall height and directly penetrating the mixing tank 202. This allows the nozzle 201 to deliver gas more quickly, and the compressed air will also come into contact with the gas earlier along the extended part of the nozzle 201, allowing the gas and compressed air to mix more quickly. This results in more complete combustion of the gas after ignition, enabling the baking temperature to reach the appropriate level in less time. This reduces the baking time of the mixing tank 202, avoids energy waste, and also extends the service life of the mixing tank 202.

[0035] A second flange 203 is provided at the bottom of the nozzle 201. The second flange 203 is connected to the first flange 302 by bolts. A connecting pipe 204 is provided on one side of the mixing tank 202. A top cover 205 is provided on the top of the mixing tank 202. The inner wall of the top cover 205 is connected to the outer wall of the nozzle 201. The mixing tank 202 is welded to the nozzle 201. The top cover 205 is provided on its top to seal the mixing tank 202. The connecting pipe 204 on one side of the mixing tank 202 is used to connect to a compressed air pipeline to provide compressed air to the nozzle 201.

[0036] Referring to Figures 1-3, this embodiment provides an adjustment structure, including:

[0037] The connecting assembly 100 includes a telescopic member 101, a connector 102 disposed on the inner wall of the telescopic member 101, and a rotating member 103 disposed on the outer wall of the telescopic member 101. The connector 102 can slide inside the telescopic member 101, and the rotating member 103 can rotate on the telescopic member 101, as shown in Figure 6. The outer wall of the extension tube 301 is provided with threads, and the rotating member 103 is threadedly connected to the outer wall of the extension tube 301. The telescopic member 101 and the connector 102 can be moved by rotating the rotating member 103, thereby increasing the height of the telescopic member 101 and the connector 102.

[0038] As an optional embodiment, by adding a connecting component 100 to the bottom of the extension tube 301, the length of the bottom of the nozzle 201 can be increased as needed, thereby accelerating the time for gas to enter the nozzle 201 and changing the ignition point again, thus controlling the combustion time of the gas.

[0039] The telescopic component 101 includes an extension pipe 101-1, a sliding groove 101-2 disposed on the inner wall of the extension pipe 101-1, a protruding ring 101-3 disposed on the outer wall of the extension pipe 101-1, a through hole 101-4 disposed on the inner wall of the extension pipe 101-1 and located below the sliding groove 101-2, and an inclined groove 101-5 disposed on the inner wall of the extension pipe 101-1 and located below the through hole 101-4. All components in the telescopic component 101 are integrally formed. The sliding groove 101-2 and the through hole 101-4 are interconnected. The inclined groove 101-5 at its bottom is designed to facilitate better entry of gas into the extension pipe 101-1.

[0040] The connector 102 includes a connecting tube 102-1, a first limiting ring 102-2 disposed at the top of the connecting tube 102-1, and a second limiting ring 102-3 disposed at the bottom of the connecting tube 102-1. The outer wall of the second limiting ring 102-3 is slidably connected to the inner wall of the sliding groove 101-2. The top and bottom diameters of the sliding groove 101-2 are both smaller than the diameter of the second limiting ring 102-3. The top of the extension tube 101-1 is slidably connected to the outer wall of the connecting tube 102-1. The connecting tube 102-1 can slide inside the extension tube 101-1. Therefore, when the extension tube 101-1 and the connecting tube 102-1 are pulled in opposite directions, the extension tube 101-1 and the connecting tube 102-1 can be pulled to their longest length.

[0041] It should be noted that the second limiting ring 102-3 is used to prevent the connecting pipe 102-1 from disengaging from the extension pipe 101-1, and it can only slide within the sliding groove 101-2.

[0042] The rotating component 103 includes a sleeve 103-1 and a nut 103-2 disposed on the outer wall of the sleeve 103-1. The sleeve 103-1 is sleeved on the outer wall of the convex ring 101-3, and the inner wall of the sleeve 103-1 is rotatably connected to the outer wall of the extension tube 101-1. As shown in Figure 6, the outer wall of the extension tube 301 is provided with threads, and the inner wall of the top end of the sleeve 103-1 is provided with a threaded groove, which can be threadedly connected to the other two. Therefore, when the sleeve 103-1 is rotated downward, the convex ring 101-3 and the extension tube 101-1 can be driven to move downward, so that the length of the extension tube 101-1 and the connecting tube 102-1 increases. The length of the bottom of the nozzle 201 can be freely extended in this way, thereby controlling the ignition point of the gas. In this way, different effects can be achieved by controlling the ignition point of the gas under different conditions.

[0043] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. An adjustment structure, characterized in that: It includes a connecting assembly (100), comprising a telescopic member (101), a connector (102) disposed on the inner wall of the telescopic member (101), and a rotating member (103) disposed on the outer wall of the telescopic member (101).

2. The adjustment structure according to claim 1, characterized in that: The telescopic component (101) includes an extension tube (101-1), a sliding groove (101-2) disposed on the inner wall of the extension tube (101-1), a protruding ring (101-3) disposed on the outer wall of the extension tube (101-1), a through hole (101-4) disposed on the inner wall of the extension tube (101-1) and located below the sliding groove (101-2), and an inclined groove (101-5) disposed on the inner wall of the extension tube (101-1) and located below the through hole (101-4).

3. The adjustment structure according to claim 2, characterized in that: The connector (102) includes a connecting pipe (102-1), a first limiting ring (102-2) disposed at the top of the connecting pipe (102-1), and a second limiting ring (102-3) disposed at the bottom of the connecting pipe (102-1).

4. The adjustment structure according to claim 3, characterized in that: The outer wall of the second limiting ring (102-3) is slidably connected to the inner wall of the sliding groove (101-2). The top and bottom diameters of the sliding groove (101-2) are both smaller than the diameter of the second limiting ring (102-3). The top of the extension tube (101-1) is slidably connected to the outer wall of the connecting tube (102-1).

5. The adjustment structure according to claim 4, characterized in that: The rotating component (103) includes a sleeve (103-1) and a nut (103-2) disposed on the outer wall of the sleeve (103-1).

6. The adjustment structure according to claim 5, characterized in that: The sleeve (103-1) is fitted onto the outer wall of the convex ring (101-3), and the inner wall of the sleeve (103-1) is rotatably connected to the outer wall of the extension tube (101-1).

7. A novel high-efficiency baking nozzle for continuous casting billet tundish, characterized in that: The assembly includes the adjustment structure as described in any one of claims 1 to 6, and a fixing assembly (200) including a nozzle (201) and a mixing tank (202) disposed on the outer wall of the nozzle (201); and an mounting assembly (300) disposed at the bottom of the fixing assembly (200) including an extension tube (301) and a first flange (302) disposed at the top of the extension tube (301).

8. The novel high-efficiency baking nozzle for continuous casting billet tundish according to claim 7, characterized in that: The nozzle (201) is provided with a second flange (203) at the bottom, and the second flange (203) is connected to the first flange (302) by bolts.

9. The novel high-efficiency baking nozzle for continuous casting billet tundish according to claim 8, characterized in that: A connecting pipe (204) is provided on one side of the mixing tank (202), and a top cover (205) is provided on the top of the mixing tank (202).

10. The novel high-efficiency baking nozzle for continuous casting billet tundish according to claim 9, characterized in that: The inner wall of the top cover (205) is connected to the outer wall of the nozzle (201).

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