Water-cooling square billet tundish device

Abstract

A water-cooling square billet tundish device comprises a tundish bottom cooling water pipe assembly and a side wall cooling water pipe assembly which are laid on the tundish bottom and / or the outer surface of the side wall of a tundish. The ladle bottom cooling water pipe assembly is connected with a water source and a high-pressure air source through a three-way component, a water inlet electromagnetic control valve is installed on the water inlet pipe close to the water source side, and a compressed air electromagnetic control valve is installed on the high-pressure air source side. An electronic pressure gauge is installed on the water inlet main pipe and used for monitoring the water inlet pressure of the water inlet pipe in real time and controlling opening and closing of the water inlet electromagnetic control valve and the compressed air electromagnetic control valve at the same time. By installing the cooling water pipe assembly, effective water cooling of the tundish is achieved, deformation of the tundish bottom is remarkably reduced, the use stability is improved, and the service life is prolonged. The electronic pressure gauge is combined for real-time monitoring and control, and water in the water pipe can be quickly responded and discharged when abnormal water inlet pressure is detected, so that high-temperature liquid is effectively prevented from exploding when encountering water, and the production safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting process in the iron and steel metallurgy industry, and particularly relates to a water-cooled square billet tundish device. Background Art

[0002] In the field of steelmaking in iron and steel metallurgy, the square billet tundish, as a key transition container between the ladle and the mold, undertakes the important tasks of balancing the temperature and composition of molten steel and ensuring continuous casting. The design and operation of the tundish directly affect the quality of molten steel, production efficiency, and the quality of the final cast billet. However, in the actual production process, due to the usually long design of the square billet tundish and its continuous exposure to high-temperature environments during use, the long-term thermal stress often causes significant deformation of the tundish bottom.

[0003] This problem of tundish bottom deformation is particularly prominent because it not only affects the centering adjustment of the tundish submerged nozzle but also further restricts the continuity and stability of production. Specifically, when the tundish bottom is severely deformed, it becomes difficult or even impossible to center the submerged nozzle, resulting in poor molten steel flow, damage to the balance of molten steel temperature and composition, and thus directly affecting the internal quality and surface quality of the cast billet. In addition, the tundish bottom deformation may also exacerbate the secondary oxidation and inclusion contamination of molten steel during the flow process, further reducing the purity of molten steel and the overall performance of the cast billet.

[0004] To address this problem, traditional methods mostly rely on regular replacement or repair of the tundish, which not only increases production costs but also reduces production efficiency. More importantly, even after replacement or repair, due to the continuous action of the high-temperature environment, the problem of tundish bottom deformation is still difficult to fundamentally solve. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides a water-cooled square billet tundish device that effectively solves the problem of tundish bottom deformation of traditional square billets.

[0006] The utility model is realized as follows: A water-cooled square billet tundish device includes a bottom cooling water pipe assembly and a side wall cooling water pipe assembly installed on the outer surface of the tundish bottom and / or side walls; the bottom cooling water pipe assembly includes an inlet distribution pipe, an inlet main pipe, an outlet collection pipe, and an outlet main pipe, as well as cooling branch pipes connecting the inlet distribution pipe and the outlet collection pipe; the inlet main pipe is connected to a water source and a high-pressure gas source through a tee member, an inlet electromagnetic control valve is installed on the inlet pipe near the water source side, and a compressed air electromagnetic control valve is installed on the high-pressure gas source side; an electronic pressure gauge is installed on the inlet main pipe, and the electronic pressure gauge is used to monitor the inlet water pressure of the inlet pipe in real time and control the opening and closing of the inlet electromagnetic control valve and the compressed air electromagnetic control valve.

[0007] Preferably, reinforcing ribs are arranged along the bottom edge of the tundish perpendicular to the direction of the cooling branch pipes.

[0008] Preferably, holes for passing the cooling branch pipes are provided on the reinforcing ribs.

[0009] Preferably, at least one layer of sidewall cooling water pipe assemblies is arranged around the sidewall in the height direction.

[0010] Preferably, bypasses are connected to the adjacent cooling branch pipes near the ladle outlet at both ends of the tundish.

[0011] Advantages and technical effects of the present utility model: The main technical effects of the present utility model are reflected in the following aspects: First, through the cooling water pipe assemblies installed at the bottom and / or sidewalls of the tundish, effective water cooling of the tundish is achieved, significantly reducing the deformation of the tundish bottom and improving the service stability and life of the tundish. Second, this device innovatively combines an electronic pressure gauge for real-time monitoring and control. When the detected inlet water pressure abnormally decreases, the inlet water solenoid valve can be quickly closed and the compressed air solenoid valve can be opened to instantly drain the water in the water pipeline, effectively preventing explosion accidents that may be caused by high-temperature liquid encountering clear water and significantly enhancing production safety. In addition, the reinforcing ribs provided at the bottom of the tundish not only enhance the structural strength of the bottom, but also pass the cooling branch pipes through drilling, avoiding the influence of cutting on the strength of the reinforcing ribs and further optimizing the structural design. Finally, the setting of the sidewall cooling water pipe assemblies further enhances the cooling effect on the tundish wall, effectively preventing heat conduction from the high-temperature wall to the bottom, thereby comprehensively improving the cooling effect and overall performance of the tundish. In summary, the present utility model shows significant technical effects in improving the use effect, production safety, and structural optimization of the tundish. Description of the Drawings

[0012] Figure 1 is a schematic layout structure diagram of the bottom cooling water pipe assembly of the present utility model;

[0013] Figure 2 is a schematic layout structure diagram of the sidewall cooling water pipe group of the present utility model.

[0014] In the figure, 10, bottom cooling water pipe assembly; 101, inlet water distribution pipe; 102, inlet water main pipe; 103, outlet water collecting pipe; 104, outlet water main pipe; 105, cooling branch pipe; 106, tee member; 107, inlet water solenoid valve; 108, compressed air solenoid valve; 109, electronic pressure gauge; 20, sidewall cooling water pipe assembly; 30, reinforcing rib; 301, hole. Detailed Embodiments

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0016] See also Figure 1 and Figure 2 A water-cooled billet tundish device includes a bottom cooling water pipe assembly 10 and a side wall cooling water pipe assembly 20 installed on the bottom and / or the outer surface of the side wall of the tundish; the bottom cooling water pipe assembly includes an inlet distribution pipe 101, an inlet main pipe 102, an outlet collection pipe 103, an outlet main pipe 104, and a cooling branch pipe 105 connecting the inlet distribution pipe and the outlet collection pipe; the inlet main pipe is connected to a water source and a high-pressure gas source through a three-way component 106, a water inlet electromagnetic control valve 107 is installed on the inlet pipe near the water source side, and a compressed air electromagnetic control valve 108 is installed on the high-pressure gas source side; an electronic pressure gauge 109 is installed on the inlet main pipe, and the electronic pressure gauge is used to monitor the water inlet pressure of the water inlet pipe in real time, and control the opening and closing of the water inlet electromagnetic control valve and the compressed air electromagnetic control valve. The electronic pressure gauge belongs to the prior art, and the controller of the electronic pressure gauge receives the electrical signals from the electronic pressure gauge, and these signals represent the current pressure value. The controller usually contains a microprocessor or other processing unit, which processes these signals according to the preset pressure threshold or control logic. Once the current pressure value reaches or exceeds (or falls below) the preset threshold, the controller will generate a corresponding control signal. The electronic pressure gauge in this embodiment is illustrated here using the YW-100B digital pressure gauge as an example. This type of pressure gauge not only has high-precision pressure measurement capabilities, but also has RS485 communication and output 4-20mA signal functions, which is very suitable for application scenarios that require remote monitoring and data transmission.

[0017] The working principle of the utility model is that when the electronic pressure gauge detects that the water inlet pressure of the cooling water pipe assembly at the bottom of the ladle is reduced from the normal value of 0.3MPa to 0.2MPa, it proves that there is a leakage point at the bottom of the intermediate ladle. At this time, the controller of the electronic pressure gauge directly closes the water inlet electromagnetic control valve, opens the compressed air electromagnetic control valve, and instantly discharges the water in the water pipeline of the cooling water pipe assembly at the bottom of the ladle, so as to avoid the explosion accident caused by high-temperature liquid meeting open water.

[0018] Preferably, the bottom of the tundish is provided with reinforcing ribs 30 along the direction of the vertical cooling branch pipe. The reinforcing ribs allow the longer billet tundish to be divided separately, reducing the deformation of the billet tundish after long-term use. The water pipelines are distributed at the bottom of the tundish, playing the role of water cooling the tundish and reducing the deformation of the bottom of the tundish.

[0019] Preferably, a hole 301 for installing a cooling branch pipe is provided on the reinforcing rib. By using the drilling method, the strength of the reinforcing rib is prevented from being affected by cutting and breaking.

[0020] Preferably, at least one layer of the sidewall cooling water pipe assembly is arranged around the sidewall in the height direction. In this embodiment, three layers are arranged, and the sidewall cooling water pipe assemblies on both sides are distributed in the middle and lower parts of the tundish. Cooling water pipelines are distributed around the tundish arm. The cooling water pipelines can be connected to the water source individually or can be connected after being aggregated to form a cycle, further cooling the tundish arm, and playing a role in preventing the heat conduction from the high-temperature arm to the bottom of the tundish.

[0021] Preferably, bypasses are connected to the adjacent cooling branch pipes at the positions near the water outlet at both ends of the tundish. Ensure that the cooling quickly covers the entire bottom of the tundish.

[0022] In summary, the present utility model realizes effective water cooling of the tundish by installing a cooling water pipe assembly, significantly reduces the bottom deformation of the tundish, and improves the service stability and life. The device is combined with an electronic pressure gauge for real-time monitoring and control, can quickly respond when abnormal inlet water pressure is detected, drain the water in the water pipe, effectively prevent the explosion of high-temperature liquid when encountering water, and improve the production safety. The setting of the reinforcing rib enhances the structural strength of the bottom of the tundish and optimizes the installation method of the cooling branch pipe. The sidewall cooling water pipe assembly further enhances the cooling effect and prevents the heat conduction from the high-temperature sidewall to the bottom of the tundish. In summary, the present utility model shows remarkable performance in improving the use effect, production safety and structural optimization of the tundish.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A water-cooled billet tundish device, characterized in that: It includes a ladle bottom cooling water pipe assembly and a side wall cooling water pipe assembly installed on the outer surface of the ladle bottom and / or the side wall; the ladle bottom cooling water pipe assembly includes an inlet distribution pipe, an inlet main pipe, a water outlet collecting pipe and an outlet main pipe, and a cooling branch pipe connected between the inlet distribution pipe and the outlet collecting pipe; the inlet main pipe is connected to a water source and a high-pressure gas source through a three-way component, a water inlet electromagnetic control valve is installed on the water inlet pipe close to the water source side, and a compressed air electromagnetic control valve is installed on the high-pressure gas source side; an electronic pressure gauge is installed on the inlet main pipe, and the electronic pressure gauge is used to monitor the water inlet pressure of the water inlet pipe in real time, and control the switching of the water inlet electromagnetic control valve and the compressed air electromagnetic control valve.

2. The water-cooled billet tundish device according to claim 1, characterized in that: The bottom of the tundish is provided with reinforcing ribs along the direction perpendicular to the cooling branch pipe.

3. The water-cooled billet tundish device according to claim 2, characterized in that: The reinforcing ribs are provided with holes for passing cooling branch pipes.

4. The water-cooled billet tundish device according to claim 1, characterized in that: The side wall cooling water pipe assembly is provided with at least one layer around the side wall along the height direction.

5. The water-cooled billet tundish device according to claim 1, characterized in that: The cooling branches adjacent to the water outlet at both ends of the tundish are connected with bypasses.

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