Detection device for upper nozzle of tundish

Abstract

The utility model discloses a detection device for an upper nozzle of a tundish, which relates to the technical field of ferrous metallurgy and comprises a flowmeter, the lower end of the flowmeter is connected with a three-way joint, the other two ends of the three-way joint are connected with a first pipeline and a second pipeline, a pressure gauge is mounted on the first pipeline, and a pressure regulating valve is mounted on the second pipeline. The upper end of the pressure regulating valve is connected with a hose, the lower end of the pressure gauge is connected with an air outlet pipe, one end of the hose is externally connected with a water feeding opening, a flowmeter switch is arranged on the flowmeter, and a pipe clamp is fixed to the outer wall of the second pipeline. The device for detecting the air permeability of the upper nozzle is simple in structure, low in cost, capable of remarkably improving the air permeability of the upper nozzle and improving the working efficiency, and capable of effectively avoiding production and quality accidents caused by poor air permeability of the upper nozzle. And meanwhile, statistical data of the detection result is also convenient for refractory material manufacturers to track fluctuation of product quality, and data support is provided for continuously improving the refractory material quality.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, and in particular to a detection device for the tundish nozzle. Background Technology

[0002] The tundish top nozzle (hereinafter referred to as "top nozzle") and the submerged entry nozzle form the steel molten steel channel connecting the tundish and the crystallizer. The inner wall of the top nozzle is made of a breathable refractory material, and argon gas is dispersed out through the inner wall, which plays a role in uniformizing the flow field in the crystallizer, promoting the melting of the protective slag, and preventing turbulence. The permeability of the top nozzle directly affects the stable operation of continuous casting and the internal quality of the continuously cast billet. Therefore, it is of great significance to test whether the permeability of the top nozzle is qualified before it is installed in the tundish.

[0003] Continuous casting essentially involves continuously injecting molten metal into a crystallizer, forming a solidified shell of a certain strength, and then pulling out the cast billet. Poor permeability of the top nozzle is the most common problem in the process operation from the tundish to the crystallizer. First, poor permeability of the top nozzle increases the frequency of nozzle or tundish replacement, and may even stop casting, leading to decreased productivity and increased production costs. Second, poor permeability of the top nozzle can directly cause various quality problems. For example, poor permeability of the top nozzle changes the flow pattern of molten steel in the nozzle and the jet characteristics at the outlet, which can disrupt the normal flow field in the crystallizer or cause fluctuations in the liquid level in the crystallizer. Various inclusions and gases are also entrained in the molten steel, leading to defects in the quality of the steel products.

[0004] The tundish top nozzle is a crucial component in continuous steel casting, installed at the bottom of the tundish. The nozzle bowl engages with the integral stopper rod of the tundish, controlling the flow rate of molten steel through the up-and-down movement of the stopper rod. The bottom of the top nozzle connects to the submerged entry nozzle. Controlled by the stopper rod, molten steel flows sequentially from the tundish through the top nozzle and the submerged entry nozzle to the crystallizer. The unobstructed flow path directly impacts continuous steel casting production, and currently, there is no device specifically designed to test and clear the permeability of the top nozzle.

[0005] Therefore, a detection device for the tundish nozzle is provided. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a testing device for the tundish inlet. This inlet permeability testing device has a simple structure and low cost, and can significantly improve the permeability of the inlet while increasing work efficiency. This method can effectively avoid production and quality accidents caused by poor inlet permeability. At the same time, the statistical data of the test results can also help refractory manufacturers track fluctuations in product quality, providing data support for continuous improvement of refractory quality and overcoming the shortcomings of existing technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detection device for the inlet of an intermediate tundish includes a flow meter, the lower end of which is connected to a tee connector, and the other two ends of the tee connector are connected to a first pipe and a second pipe. A pressure gauge is installed on the first pipe, and a pressure regulating valve is installed on the second pipe. A flexible hose is connected to the upper end of the pressure regulating valve.

[0009] As a further improvement of this utility model: the lower end of the pressure gauge is connected to an air outlet pipe, and one end of the hose is connected to the water inlet.

[0010] As a further improvement of this utility model, the flow meter is equipped with a flow meter switch.

[0011] As a further embodiment of this utility model: a pipe clamp is fixed to the outer wall of the second pipe, a connecting rod is fixed to the outer wall of the pipe clamp, an installation groove is provided at one end of the connecting rod, a support rod is rotatably connected to the installation groove by a connecting pin, and a protective plate is fixed to the end of the support rod away from the connecting rod.

[0012] As a further improvement of this utility model: the protective plate is located on one side of the flow meter, and the height of the protective plate is greater than the height of the flow meter.

[0013] As a further improvement of this utility model, flanges are fixed to the outer walls of both the first pipe and the vent pipe.

[0014] As a further improvement of this invention, the pressure regulating valve is located on the upper side of the flow meter.

[0015] The beneficial effects of this utility model are as follows:

[0016] This device for testing the permeability of the inlet nozzle is simple in structure and low in cost. It can significantly improve the permeability of the inlet nozzle while increasing work efficiency. This method can effectively avoid production and quality accidents caused by poor permeability of the inlet nozzle. At the same time, the statistical data of the test results can also help refractory manufacturers track fluctuations in product quality and provide data support for continuous improvement of refractory quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a detection device for the tundish nozzle proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of a detection device for the tundish nozzle proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of a detection device for the tundish nozzle proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of a detection device for the tundish nozzle proposed in this utility model.

[0021] In the diagram: 1. Flow meter; 2. Protective plate; 3. First pipe; 4. Pressure gauge; 5. Connecting rod; 6. Pipe clamp; 7. Second pipe; 8. Pressure regulating valve; 9. Hoses; 10. Support rod; 11. Flow meter switch; 12. Flange; 13. Outlet pipe; 14. Mounting groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1, referring to Figure 1-4 A detection device for the inlet of an intermediate liner includes a flow meter 1, a flow meter switch 11 on the flow meter 1, a tee connector connected to the lower end of the flow meter 1, a first pipe 3 and a second pipe 7 connected to the other two ends of the tee connector, a pressure gauge 4 installed on the first pipe 3, a pressure regulating valve 8 installed on the second pipe 7, and a hose 9 connected to the upper end of the pressure regulating valve 8.

[0024] The lower end of the pressure gauge 4 is connected to the air outlet pipe 13, and one end of the hose 9 is connected to the water inlet.

[0025] The protective plate 2 is located on one side of the flow meter 1, and the height of the protective plate 2 is greater than the height of the flow meter 1. The outer walls of the first pipe 3 and the outlet pipe 13 are both fixed with flanges 12. The pressure regulating valve 8 is located on the upper side of the flow meter 1.

[0026] Adjust the pipeline pressure to 2.0-4.0 MPa using pressure regulating valve 8, adjust the flow meter 1 to 5-20 L / min, connect hose 9 to the water inlet, and observe whether the pressure gauge 4 reading is within the range of 0.02-0.05 MPa, so as to clear the water inlet in time.

[0027] Example 2 is an optimization based on Example 1. Specifically, a pipe clamp 6 is fixed to the outer wall of the second pipe 7, and a connecting rod 5 is fixed to the outer wall of the pipe clamp 6. An installation groove 14 is opened at one end of the connecting rod 5. A support rod 10 is rotatably connected to the installation groove 14 through a connecting pin. A protective plate 2 is fixed to the end of the support rod 10 away from the connecting rod 5.

[0028] When not in use, rotate the protective plate 2 to one side of the flow meter 1. The protective plate 2 can protect the flow meter 1 from collisions or impacts from foreign objects.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A tundish nozzle detection device comprising a flowmeter (1), characterized in that, The flow meter (1) is connected to a three-way connector at its lower end. The other two ends of the three-way connector are connected to a first pipe (3) and a second pipe (7). A pressure gauge (4) is installed on the first pipe (3), and a pressure regulating valve (8) is installed on the second pipe (7). A hose (9) is connected to the upper end of the pressure regulating valve (8).

2. The detection device for a tundish nozzle according to claim 1, characterized by The lower end of the pressure gauge (4) is connected to an air outlet pipe (13), and one end of the hose (9) is connected to the water inlet.

3. The detection device for a tundish nozzle according to claim 1, characterized by The flow meter (1) is equipped with a flow meter switch (11).

4. The detection device for a tundish nozzle according to claim 1, characterized by The outer wall of the second pipe (7) is fixed with a pipe clamp (6), and the outer wall of the pipe clamp (6) is fixed with a connecting rod (5). One end of the connecting rod (5) is provided with an installation groove (14). A support rod (10) is rotatably connected to the installation groove (14) through a connecting pin. A protective plate (2) is fixed to the end of the support rod (10) away from the connecting rod (5).

5. The detection device for a tundish nozzle according to claim 4, characterized by The protective plate (2) is located on one side of the flow meter (1), and the height of the protective plate (2) is greater than the height of the flow meter (1).

6. The detection device for a tundish nozzle according to claim 1, characterized by Flanges (12) are fixed to the outer walls of the first pipe (3) and the air outlet pipe (13).

7. The detection device for a tundish nozzle according to claim 1, characterized by The pressure regulating valve (8) is located on the upper side of the flow meter (1).

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