Slab quick-change argon blowing type upper nozzle

Abstract

The utility model relates to the technical field of functional refractory material equipment, in particular to a slab quick-change argon blowing type water feeding opening which comprises a zirconium oxide shell, a water feeding body is fixedly installed on the inner wall of the zirconium oxide shell, and the water feeding body comprises a water feeding body body, a bowl opening part and a ventilation part. Argon blowing holes are symmetrically formed in the zirconium oxide shell, the water feeding body and the ventilation part, argon blowing channels communicating with the multiple argon blowing holes are formed in the zirconium oxide shell and comprise a top blowing channel, a bottom blowing channel and a total channel, a three-way valve is arranged in a circular groove, a hollow pipe is rotationally installed in a penetrating opening, and a gas inlet is formed in the hollow pipe. One end of the hollow pipe is fixedly connected with the surface of the three-way valve, and the other end is fixedly provided with an identification part for controlling rotation and identifying the state of the valve. According to the argon blowing device, different argon blowing holes are controlled and communicated through the three-way valve, so that argon blowing positions required by different temperatures and molten steel are further selected, and the metallurgical quality of the molten steel and the quality of a continuous casting billet are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of functional refractory material equipment, in particular to a slab quick-change argon-blowing type water inlet. Background Art

[0002] The upper nozzle of the plate-damaged tundish is a disposable refractory component. Its quality is directly related to whether the continuous casting process can proceed normally, the length of continuous casting time and the casting quality. The bowl mouth of the upper nozzle of the plate-damaged tundish cooperates with the integral stopper rod. The bowl mouth part should be resistant to scouring and corrosion to ensure that the stopper rod can control the flow normally. There is an argon blowing hole inside the part that cooperates with the lower nozzle. The position of the argon blowing hole has an important influence on the stirring of the molten steel, the efficiency of inclusion removal and the uniformity of the molten steel during the continuous casting process. It can be roughly divided into top argon blowing and bottom argon blowing, and the argon seal protection of the upper nozzle.

[0003] Different temperatures and steel liquid compositions require corresponding different argon blowing positions. However, for the convenience of use, the existing plate-damaged tundish water inlet is usually not equipped with a device to accurately control the argon blowing position, resulting in argon continuously flowing into multiple argon blowing channels. This is not only not conducive to further improving the product quality of the continuous casting process, but may also cause excess argon waste. Utility Model Content

[0004] The purpose of the utility model is to solve the following shortcomings in the prior art: different molten steel compositions require corresponding different argon blowing positions, and the existing slab tundish water inlet is usually not provided with a device for controlling the argon blowing position for the convenience of use, which is not conducive to further optimizing the product quality of the continuous casting process. Instead, a slab quick-change argon blowing water inlet is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A slab quick-change argon-blowing water inlet comprises a zirconia shell, an upper water body is fixedly mounted on the inner wall of the zirconia shell, the upper water body comprises an upper water body body, a bowl-shaped portion and a breathable portion, argon blowing holes are symmetrically provided inside the zirconia shell, the upper water body body and the breathable portion, argon blowing channels respectively connected to a plurality of argon blowing holes are provided inside the zirconia shell, the argon blowing channels comprise a top blowing channel, a bottom blowing channel and a total channel, a circular groove connected to the argon blowing channels and a through-hole connected to the outside are provided inside the zirconia shell, a three-way valve is provided in the circular groove, the three channel openings of the three-way valve are respectively connected to the top blowing channel, the bottom blowing channel and the total channel, a hollow tube is rotatably mounted in the through-hole, one end of the hollow tube is fixedly connected to the surface of the three-way valve, and the other end is fixedly provided with an identification component for controlling its rotation and identifying the valve state.

[0007] Preferably, a spherical airbag is fixedly connected to one end of the inner wall of the hollow tube close to the three-way valve, the interior of the spherical airbag is connected to the interior of the hollow tube, the inner wall of the hollow tube is partially threaded, a threaded rod is installed on the inner thread of the hollow tube, one end of the threaded rod is fixedly connected to a piston in sliding and sealing contact with the inner wall of the hollow tube, and the other end is connected to a rotating component for controlling the movement of the threaded rod in the hollow tube, and the surface of the zirconia shell is provided with an observation component for monitoring the argon gas flow rate.

[0008] Preferably, the rotating component includes a connecting block fixedly connected to one end of the threaded rod, and a hand crank is fixedly mounted on the surface of the connecting block.

[0009] Preferably, the identification component includes a handwheel, and the hollow tube is fixedly connected to the handwheel via four identification rods, wherein the surfaces of three of the identification rods are coated with coloring pigments for corresponding to the valve positions of the three-way valve.

[0010] Preferably, the observation component includes a plurality of gas flow monitors, and the surface of the zirconia shell is provided with a plurality of mounting openings connected to the main channel and the top blowing channel, and the plurality of gas flow monitors are fixedly installed in the plurality of mounting openings.

[0011] Preferably, the material of the bowl mouth is aluminum carbon, and the material of the air permeable part is air permeable material containing graphite components.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By controlling the hand wheel and the hollow tube to control the rotation of the three-way valve, and by controlling the connection of different argon blowing holes, corresponding to the connection mode of the argon blowing channel, top argon blowing, bottom argon blowing, dual-channel argon blowing at the same time, and argon blowing stop can be selected, so as to further select the argon blowing position required by different temperatures and molten steel, effectively improving the metallurgical quality of molten steel and the quality of continuous casting billets;

[0014] By controlling the movement of the threaded rod inside the hollow tube 10 through a hand crank, the piston is controlled to compress or inhale the gas in the spherical airbag, thereby controlling the expansion or contraction of the spherical airbag in the three-way valve, which ultimately affects the argon flow rate entering the argon blowing channel. This change can be observed through a gas flow monitor, reducing the waste of excess argon due to the different argon flow rates required for different temperatures and molten steel, which helps save energy and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a slab quick-change argon-blowing water nozzle proposed in the utility model;

[0016] Figure 2This is a side sectional structural diagram of a slab quick-change argon-blowing water inlet proposed by the utility model;

[0017] Figure 3 This is a partial three-dimensional structural diagram of the three-way valve and hollow tube in a slab quick-change argon-blowing water inlet proposed by the utility model;

[0018] Figure 4 This is a side sectional three-dimensional structural diagram of a three-way valve and a hollow tube in a slab quick-change argon-blowing water inlet proposed by the utility model.

[0019] In the figure: 1 zirconia shell, 2 water inlet body, 3 bowl mouth, 4 breathable part, 5 top blowing channel, 6 bottom blowing channel, 7 main channel, 8 circular groove, 9 three-way valve, 10 hollow tube, 11 threaded rod, 12 piston, 13 spherical airbag, 14 connecting block, 15 hand crank, 16 identification rod, 17 hand wheel, 18 gas flow monitor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] The terms "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not intended to limit the scope of application of the present invention. Changes or adjustments to their relative relationships shall be deemed to be within the scope of application of the present invention without substantially changing the technical content.

[0022] Reference Figure 1-Figure 4A slab quick-change argon-blowing water inlet comprises a zirconia shell 1, an upper water body is fixedly mounted on the inner wall of the zirconia shell 1, the upper water body comprises an upper water body body 2, a bowl-shaped portion 3 and a breathable portion 4, and argon blowing holes are symmetrically opened inside the zirconia shell 1, the upper water body body 2 and the breathable portion 4. The aperture of the multiple argon blowing holes is 0.5~0.6mm. The small aperture helps to prevent backflow because the smaller aperture can reduce the channel area for liquid reflux, thereby reducing the possibility of backflow. An argon blowing channel is provided inside the zirconia shell 1, which is respectively connected to a plurality of argon blowing holes. The argon blowing channel includes a top blowing channel 5, a bottom blowing channel 6 and a total channel 7. A circular groove 8 connected to the argon blowing channel and a through-hole connected to the outside are provided inside the zirconia shell 1. A three-way valve 9 is provided in the circular groove 8. The three channel openings of the three-way valve 9 are respectively connected to the top blowing channel 5, the bottom blowing channel 6 and the total channel 7. A hollow tube 10 is rotatably installed in the through-hole. One end of the hollow tube 10 is fixedly connected to the surface of the three-way valve 9, and the other end is fixedly installed with an identification component for controlling its rotation and identifying the valve state. The identification component includes a handwheel 17. The hollow tube 10 is fixedly connected to the handwheel 17 through four identification rods 16, and the surfaces of three of the identification rods 16 are coated with coloring pigments for corresponding to the valve position of the three-way valve 9.

[0023] Before casting begins, argon is first introduced into the main channel 7. The status of the valve at this time is first understood by observing the identification rod 16, and then the required argon blowing position is selected according to the temperature and the composition of the molten steel. If top blowing of argon is required, the handwheel 17 is rotated 90° clockwise. At this time, the three-way valve 9 connects the main channel 7 and the top blowing channel 5; if bottom blowing of argon is required, the handwheel 17 is rotated 90° counterclockwise. At this time, the three-way valve 9 connects the main channel 7 and the bottom blowing channel 6; if top blowing of argon and bottom blowing of argon are required at the same time, the initial state of the valve is maintained, that is, the three-way valve 9 connects the top blowing channel 5 and the bottom blowing channel 6 at the same time; if you want to stop blowing argon, just rotate the handwheel 17 180° clockwise. At this time, the three-way valve 9 is cut off from the connection with the main channel 7.

[0024] A spherical airbag 13 is fixedly connected to one end of the inner wall of the hollow tube 10 near the three-way valve 9, and the interior of the spherical airbag 13 is connected to the interior of the hollow tube 10. The inner wall of the hollow tube 10 is partially threaded, and a threaded rod 11 is installed on the inner thread of the hollow tube 10. One end of the threaded rod 11 is fixedly connected to a piston 12 that is in sliding and sealing contact with the inner wall of the hollow tube 10, and the other end is connected to a rotating component for controlling the movement of the threaded rod 11 in the hollow tube 10. The rotating component includes a connecting block 14 fixedly connected to one end of the threaded rod 11, and a hand crank 15 is fixedly installed on the surface of the connecting block 14. An observation component for monitoring the argon gas flow rate is provided on the surface of the zirconia shell 1, and the observation component includes multiple gas flow monitors 18. The surface of the zirconia shell 1 is respectively provided with multiple mounting ports connected to the total channel 7 and the top blowing channel 5, and the multiple gas flow monitors 18 are fixedly installed in the multiple mounting ports.

[0025] The required flow rate of argon gas introduced is selected according to different temperatures and steel liquid components. If the flow rate of argon gas introduced needs to be reduced, the hand crank 15 needs to be rotated, and then the threaded rod 11 needs to be driven deep into the hollow tube 10. At this time, the piston 12 at the front end of the threaded rod 11 will squeeze the gas inside the hollow tube 10 into the spherical airbag 13, and then the spherical airbag 13 will expand and become larger inside the three-way valve 9, gradually blocking the gap between the main channel 7 and the three-way valve 9. At this time, the flow rate of argon gas introduced into the entire argon blowing channel will slowly decrease, and finally this change can be observed by observing the connected gas flow monitor 18; conversely, if the flow rate of argon gas introduced needs to be increased, the hand crank 15 needs to be rotated in the opposite direction, the threaded rod 11 slowly extends out of the hollow tube 10, and the gas in the spherical airbag 13 returns to the hollow tube 10, thereby slowly shrinking. At this time, the flow rate of argon gas introduced into the entire argon blowing channel will slowly increase.

[0026] The material of the bowl mouth part 3 is aluminum carbon, and the material of the air permeable part 4 is air permeable material and contains graphite components.

[0027] Aluminum carbon has good thermal shock resistance and corrosion resistance, and the breathable material contains graphite components, which not only ensures permeability but also maintains structural stability.

[0028] In the present invention, before the start of casting, argon is first introduced into the main channel 7. The state of the valve at this time is first understood by the identification component, and then the required argon blowing position is selected according to the temperature and the composition of the molten steel. If top argon blowing is required, the hand wheel 17 is rotated 90° clockwise. At this time, the three-way valve 9 connects the main channel 7 and the top blowing channel 5; if bottom argon blowing is required, the hand wheel 17 is rotated 90° counterclockwise. At this time, the three-way valve 9 connects the main channel 7 and the bottom blowing channel 6; if top argon blowing and bottom argon blowing are required at the same time, the valve initial state is maintained, that is, the three-way valve 9 connects the top blowing channel 5 and the bottom blowing channel 6 at the same time; if you want to stop blowing argon, you only need to rotate the hand wheel 17 180° clockwise. At this time, the three-way valve 9 is cut off from the connection with the main channel 7. By controlling the connection of different argon blowing holes, the argon blowing position required by different temperatures and molten steel can be further selected, thereby effectively improving the metallurgical quality of the molten steel and the quality of the continuous casting billet.

[0029] In the present invention, unless otherwise clearly specified or limited, the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slab quick-change argon-blowing nozzle, comprising a zirconia shell (1), characterized in that: An upper water body is fixedly mounted on the inner wall of the zirconia shell (1), and the upper water body comprises an upper water body body (2), a bowl-shaped portion (3), and a breathable portion (4). Argon blowing holes are symmetrically provided inside the zirconia shell (1), the upper water body body (2), and the breathable portion (4). Argon blowing channels are provided inside the zirconia shell (1), which are respectively connected to the plurality of argon blowing holes. The argon blowing channels comprise a top blowing channel (5), a bottom blowing channel (6), and a total channel (7). The zirconia shell ( 1) A circular groove (8) connected to the argon blowing channel and a through hole connected to the outside are provided inside the circular groove (8), a three-way valve (9) is provided in the circular groove (8), and the three channel openings of the three-way valve (9) are respectively connected to the top blowing channel (5), the bottom blowing channel (6) and the main channel (7), and a hollow tube (10) is rotatably installed in the through hole. One end of the hollow tube (10) is fixedly connected to the surface of the three-way valve (9), and the other end is fixedly installed with an identification component for controlling its rotation and identifying the valve state.

2. The slab quick-change argon-blowing nozzle according to claim 1, characterized in that: A spherical airbag (13) is fixedly connected to one end of the inner wall of the hollow tube (10) near the three-way valve (9), and the interior of the spherical airbag (13) is connected to the interior of the hollow tube (10). The inner wall of the hollow tube (10) is partially threaded, and a threaded rod (11) is installed on the inner thread of the hollow tube (10). One end of the threaded rod (11) is fixedly connected to a piston (12) in sliding and sealing contact with the inner wall of the hollow tube (10), and the other end is connected to a rotating component for controlling the movement of the threaded rod (11) in the hollow tube (10). An observation component for monitoring the argon gas flow rate is provided on the surface of the zirconia shell (1).

3. The slab quick-change argon-blowing nozzle according to claim 2, characterized in that: The rotating component comprises a connecting block (14) fixedly connected to one end of the threaded rod (11), and a hand crank (15) is fixedly mounted on the surface of the connecting block (14).

4. The slab quick-change argon-blowing nozzle according to claim 1, characterized in that: The identification component includes a handwheel (17), and the hollow tube (10) is fixedly connected to the handwheel (17) via four identification rods (16), wherein three of the identification rods (16) are coated with coloring pigments for corresponding to the valve position of the three-way valve (9).

5. The slab quick-change argon-blowing nozzle according to claim 2, characterized in that: The observation component includes a plurality of gas flow monitors (18), and a plurality of mounting openings connected to the main channel (7) and the top blowing channel (5) are respectively opened on the surface of the zirconium oxide housing (1), and the plurality of gas flow monitors (18) are fixedly installed in the plurality of mounting openings.

6. The slab quick-change argon-blowing nozzle according to claim 1, characterized in that: The material of the bowl mouth (3) is aluminum carbon, and the material of the air permeable portion (4) is air permeable material containing graphite components.

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