Molten steel transmission device based on double-loop argon positioning protection

Abstract

The utility model discloses a molten steel transmission device based on double-loop argon positioning protection, comprising a long shroud, the top of the long shroud is sleeved with a ladle outlet, a stop mechanism is connected to the connection between the ladle outlet and the long shroud, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to an argon gas pipe. The utility model improves the sealing performance through the double-loop structure and the surface contact between the ladle outlet and the bowl of the long shroud; the stop boss can effectively ensure the precise centering of the ladle outlet and the long shroud, and reduce the local erosion of the intermediate ladle lining by the bias flow; the surface contact between the ladle outlet and the bowl of the long shroud effectively reduces the problem of non-metallic inclusions introduced into the clean molten steel due to sharp contact, and ensures the contact stability between the ladle outlet and the long shroud.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting devices in the metallurgical industry, and in particular relates to a molten steel transmission device based on double-loop argon positioning protection. Background Art

[0002] The continuous casting process is an efficient production process for molten steel forming, which mainly includes a ladle, a shroud, a tundish, an immersion shroud and a supporting cooling system such as a crystallizer. Among them, the shroud and the immersion shroud are used to transfer molten steel between different containers. Compared with the immersion shroud, the sealing effect of the shroud and the prevention of the introduction of secondary inclusions are particularly important.

[0003] Generally, the long nozzle bowl between the ladle and the tundish is in an inverted cone-shaped contact with the ladle outlet, which is used to prevent the secondary oxidation of the molten steel during the transfer between the two ladles and reduce the temperature drop. However, in the actual production process, when workers use a mechanical arm to install the long nozzle, it is easy for the inverted cone tips to collide with each other, thereby damaging the nozzle bowl, introducing new non-metallic impurities into the molten steel, and further causing a poor seal; at the same time, inaccurate positioning of the long nozzle can easily cause the molten steel in the tundish to flow deviatedly, causing local erosion of the lining inside the tundish. Due to the above process problems, it is easy for high-value-added molten steel to introduce non-metallic inclusions and secondary oxidation, which seriously affects the quality of the ingot and the smooth production. Utility Model Content

[0004] The utility model aims to provide a molten steel transmission device based on double-loop argon positioning protection, which solves the problems in the prior art of poor sealing of the long nozzle and inaccurate positioning of the long nozzle, which easily causes molten steel in the tundish to flow sideways.

[0005] The technical solution adopted by the utility model is a molten steel transmission device based on double-loop argon positioning protection, including a long water nozzle, the top of the long water nozzle is sleeved with a ladle water nozzle, a stop mechanism is connected to the connection between the ladle water nozzle and the long water nozzle, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to argon gas pipes.

[0006] The utility model is also characterized in that:

[0007] The top of the long water outlet is connected with a bowl mouth, the inner wall of the bowl mouth is provided with a boss along its circumference, the ladle outlet contacts the boss, and the surface of the boss is connected with a stop mechanism.

[0008] The stop mechanism includes a stop boss, which is connected to the upper surface of the boss and is arranged along the circumference of the boss. The surface where the ladle outlet contacts the boss is provided with a stop groove along its circumference. The stop boss is clamped in the stop groove, and the sealing unit is arranged on both sides of the stop boss.

[0009] The sealing unit includes an inner loop argon sealing channel, which is respectively opened on the side opposite to the stop boss and the stop groove, and the inner loop argon sealing channel is arranged along the circumference of the stop boss and the stop groove, and the inner loop argon sealing channel is connected to the argon pipe.

[0010] The sealing unit also includes an outer loop argon sealing channel, which is respectively opened on the other side of the stop boss and the stop groove opposite to each other, and the outer loop argon sealing channel is arranged along the circumference of the stop boss and the stop groove, and the outer loop argon sealing channel is connected to the argon pipe.

[0011] The body of the argon gas pipe is connected with an air intake check valve.

[0012] The beneficial effects of the utility model are:

[0013] The utility model discloses a molten steel transmission device based on double-loop argon positioning protection, which improves sealing performance through the double-loop structure and the surface contact between the ladle water outlet and the bowl of the shroud; the stop boss can effectively ensure the accurate centering of the ladle water outlet and the shroud, and reduce the local erosion of the intermediate ladle lining by the deviation flow; through the surface contact between the ladle water outlet and the bowl of the shroud, the problem of non-metallic inclusions introduced into the clean molten steel due to sharp contact is effectively reduced, and the contact stability between the ladle water outlet and the shroud is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the molten steel transmission device based on double-loop argon positioning protection of the utility model;

[0015] Figure 2 It is a top view of the molten steel transmission device based on double-loop argon positioning protection of the utility model;

[0016] Figure 3 It is a partial top view of the molten steel transmission device based on double-loop argon positioning protection of the utility model.

[0017] In the figure, 1. ladle outlet, 2. long water outlet, 21. bowl mouth, 22. boss, 3. inner loop argon sealing channel, 4. outer loop argon sealing channel, 5. stop boss, 6. air inlet check valve, 7. argon pipe. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0019] The utility model is based on a molten steel transmission device with double-loop argon positioning protection, such as Figure 1As shown, it includes a long shroud 2, the top of which is sleeved with a ladle outlet 1, a stop mechanism is connected at the connection between the ladle outlet 1 and the long shroud 2, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to an argon gas pipe 7. The ladle water inlet 1 is sleeved with the long water outlet 2 and positioned by a stop mechanism to ensure that the ladle water inlet 1 and the long water outlet 2 are coaxially arranged. Since the flow channel diameter of the long water outlet 2 is larger than the flow channel diameter of the ladle water inlet 1, the molten steel will not have a deviation phenomenon during the flow process. In addition, there is a sealing unit between the ladle water inlet 1 and the long water outlet 2, and argon gas is continuously introduced into the sealing unit through the argon pipe 7 to form an airtight seal at the connection between the ladle water inlet 1 and the long water outlet 2 to ensure the purity of the molten steel in the flow channel. The ladle water inlet 1 is sleeved in the top of the long water outlet 2, and the two are in surface contact. Compared with the inverted cone-shaped contact between the conventional long water outlet bowl and the ladle water inlet 1, it prevents the water outlet bowl from being damaged due to collision with the tip.

[0020] Example 1

[0021] A molten steel transmission device based on double-loop argon positioning protection includes a long water inlet 2, the top of which is sleeved with a ladle outlet 1, a stop mechanism is connected at the connection between the ladle outlet 1 and the long water inlet 2, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to an argon gas pipe 7.

[0022] The top of the long shroud 2 is connected with a bowl mouth 21, and a boss 22 is provided on the inner wall of the bowl mouth 21 along its circumference. The ladle outlet 1 contacts the boss 22, and the surface of the boss 22 is connected to the stop mechanism. The ladle outlet 1 is a "yurt" type ladle outlet 1, and the outer diameter of the bowl mouth 21 is larger than the outer diameter of the long shroud 2. A groove is provided on the top of the bowl mouth 21 for sleeve-fitting the ladle outlet 1, that is, a boss 22 is provided on the inner wall of the bowl mouth 21 as a platform for receiving the ladle outlet 1, and the contact surface between the boss 22 and the ladle outlet 1 is a plane. The stop mechanism is connected to the surface of the boss 22, and the ladle outlet 1 is connected with the long shroud 2, and the two are positioned to ensure that the ladle outlet 1 and the long shroud 2 are coaxially arranged to prevent the molten steel from flowing sideways.

[0023] Example 2

[0024] A molten steel transmission device based on double-loop argon positioning protection includes a long water inlet 2, the top of which is sleeved with a ladle outlet 1, a stop mechanism is connected at the connection between the ladle outlet 1 and the long water inlet 2, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to an argon gas pipe 7.

[0025] The top of the long water nozzle 2 is connected with a bowl mouth 21, and the inner wall of the bowl mouth 21 is provided with a boss 22 along its circumference. The ladle water nozzle 1 contacts the boss 22, and the surface of the boss 22 is connected with a stop mechanism.

[0026] like Figure 2-3As shown, the stop mechanism includes a stop boss 5, which is connected to the upper surface of the boss 22, and is arranged along the circumference of the boss 22. The surface of the ladle outlet 1 in contact with the boss 22 is provided with a stop slot along its circumference, and the stop boss 5 is engaged in the stop slot, and the sealing unit is arranged on both sides of the stop boss 5. The stop boss 5 is arranged along the circumference of the upper surface of the boss 22, and the stop slot is arranged along the circumference of the end of the ladle outlet 1. The two are engaged and matched, and the boss 22 and the ladle outlet 1 can be positioned, that is, the ladle outlet 1 and the long nozzle 2 can be positioned. Since the flow channel diameter of the ladle outlet 1 is smaller than the flow channel diameter of the long nozzle 2, the two are coaxially arranged, which can prevent the molten steel from flowing sideways. The sealing unit seals on both sides of the stop boss 5 and the stop slot.

[0027] Example 3

[0028] A molten steel transmission device based on double-loop argon positioning protection includes a long water inlet 2, the top of which is sleeved with a ladle outlet 1, a stop mechanism is connected at the connection between the ladle outlet 1 and the long water inlet 2, sealing units are arranged on both sides of the stop mechanism, and the sealing units are connected to an argon gas pipe 7.

[0029] The top of the long water nozzle 2 is connected with a bowl mouth 21, and the inner wall of the bowl mouth 21 is provided with a boss 22 along its circumference. The ladle water nozzle 1 contacts the boss 22, and the surface of the boss 22 is connected with a stop mechanism.

[0030] The stop mechanism includes a stop boss 5, which is connected to the upper surface of the boss 22. The stop boss 5 is arranged along the circumference of the boss 22. The surface of the ladle outlet 1 that contacts the boss 22 is provided with a stop groove along its circumference. The stop boss 5 is clamped in the stop groove, and the sealing unit is arranged on both sides of the stop boss 5.

[0031] The sealing unit includes an inner loop argon sealing channel 3, which is separately provided on the side of the stop boss 5 where the stop grooves are opposite to each other, and is arranged along the circumference of the stop boss 5 and the stop grooves, and is connected to the argon pipe 7. Grooves are respectively provided along the circumference of the side of the stop boss 5 where the stop grooves are opposite to each other, and the two grooves are arranged opposite to each other to form the inner loop argon sealing channel 3. Argon is introduced into the inner loop argon sealing channel 3 through the argon pipe 7 to form a gas seal.

[0032] The sealing unit also includes an outer loop argon sealing channel 4, which is respectively opened on the other side of the stop boss 5 and the stop slot, and is arranged along the circumference of the stop boss 5 and the stop slot, and is connected to the argon pipe 7. The stop boss 5 is clamped in the stop slot, that is, the two sides of the stop boss 5 are respectively arranged opposite to the two inner walls opposite to the stop slot, and grooves are respectively arranged along the circumference of the other side of the stop boss 5 and the stop slot, and the two oppositely arranged grooves constitute the outer loop argon sealing channel 4. Argon is introduced into the outer loop argon sealing channel 4 through the argon pipe 7, and an air seal can also be formed. The outer loop argon sealing channel 4 cooperates with the two air seals of the inner loop argon sealing channel 3 to form a complete seal on the connection between the stop boss 5 and the stop slot, thereby ensuring the purity of the molten steel in the flow channel.

[0033] The tube body of the argon gas pipe 7 is connected with an air intake check valve 6. The air intake check valve 6 serves as a switch of the argon gas pipe 7 to control the circulation of the argon gas.

[0034] The utility model is based on the double-loop argon positioning protection of the molten steel transmission device, the use method is as follows:

[0035] Before the ladle water outlet 1 is connected with the long water outlet 2, open the air inlet check valve 6, and introduce argon into the outer loop argon sealing channel 4 and the inner loop argon sealing channel 3 through the argon pipe 7 to blow out the impurities in the two channels. Then place the ladle water outlet 1 in the bowl mouth 21 to ensure that the end of the ladle water outlet 1 is in contact with the boss 22, and the stop boss 5 is clamped in the stop groove. The ladle water outlet 1 and the long water outlet 2 can be positioned to ensure that the molten steel will not have a deviation flow scene, and then continue to introduce argon into the outer loop argon sealing channel 4 and the inner loop argon sealing channel 3 to form an air seal to ensure the purity of the molten steel.

[0036] The utility model is based on a molten steel transmission device with double-loop argon positioning protection. The double-loop structure and the surface contact between the bowls of the ladle water inlet 1 and the long nozzle 2 improve the sealing performance. The stop boss 5 can effectively ensure the precise centering of the ladle water inlet 1 and the long nozzle 2, and reduce the local erosion of the intermediate ladle lining by the deviation flow. The surface contact between the bowls of the ladle water inlet 1 and the long nozzle 2 effectively reduces the problem of non-metallic inclusions introduced into the clean molten steel due to sharp contact, and ensures the contact stability between the ladle water inlet 1 and the long nozzle 2.

Claims

1. A molten steel transmission device based on double-loop argon positioning protection, characterized in that: It comprises a long shroud (2), the top of which is sleeved with a ladle outlet (1), a stop mechanism is connected at the connection between the ladle outlet (1) and the long shroud (2), sealing units are arranged on both sides of the stop mechanism, and the sealing unit is connected to an argon gas pipe (7).

2. The molten steel transmission device based on double-loop argon positioning protection as claimed in claim 1 is characterized in that: The top of the long water outlet (2) is connected to a bowl mouth (21), the inner wall of the bowl mouth (21) is provided with a boss (22) along its circumference, the ladle water outlet (1) is in contact with the boss (22), and the surface of the boss (22) is connected to a stop mechanism.

3. The molten steel transmission device based on double-loop argon positioning protection as claimed in claim 2 is characterized in that: The stop mechanism comprises a stop boss (5), the stop boss (5) is connected to the upper surface of the boss (22), the stop boss (5) is arranged along the circumference of the boss (22), a stop groove is provided along the circumference of the surface of the ladle outlet (1) in contact with the boss (22), the stop boss (5) is engaged in the stop groove, and the sealing unit is arranged on both sides of the stop boss (5).

4. The molten steel transmission device based on double-loop argon positioning protection as claimed in claim 3 is characterized in that: The sealing unit comprises an inner loop argon sealing channel (3), the inner loop argon sealing channel (3) being respectively opened on the side of the stop boss (5) and the stop groove which are opposite to each other, the inner loop argon sealing channel (3) being arranged along the circumference of the stop boss (5) and the stop groove, and the inner loop argon sealing channel (3) being connected to the argon pipe (7).

5. The molten steel transmission device based on double-loop argon positioning protection as claimed in claim 4 is characterized in that: The sealing unit further comprises an outer loop argon sealing channel (4), the outer loop argon sealing channel (4) being respectively opened on the other side of the stop boss (5) and the stop slot which are opposite to each other, the outer loop argon sealing channel (4) being arranged along the circumference of the stop boss (5) and the stop slot, and the outer loop argon sealing channel (4) being connected to the argon pipe (7).

6. The molten steel transmission device based on double-loop argon positioning protection as claimed in claim 5 is characterized in that: The tube body of the argon gas tube (7) is connected to an air intake check valve (6).

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