Externally-hung submerged nozzle argon protection device

Abstract

The utility model relates to the technical field of continuous casting, in particular to an externally-hung submerged nozzle argon protection device which comprises an annular sealing ring, an annular channel is arranged in the annular sealing ring, the outer ring of the annular channel is connected with an argon supply system, and 20-26 radial round holes with the diameter of 2.5-3.5 mm are evenly distributed in the inner ring of the annular channel along the circumference; and an elastic buckle and an argon supply system. Compared with the prior art, the argon protection device has the advantages that the two sides of the annular sealing ring filled with argon are installed in a buckling mode, the annular sealing ring is prevented from falling off when the water gap is replaced, installation and adjustment are convenient, argon micro-positive pressure is formed towards the bowl portion of the submersed nozzle and the upper water gap of a tundish, and the argon protection device is convenient to install and adjust. 24 circular holes with the diameter of 3mm are designed, so that argon can enter each point in the circular ring, and positive pressure can be realized by only needing a trace amount of argon, so that sealing is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to continuous casting technical field especially relates to a kind of outer hanging immersion type water gap argon protection device. BACKGROUND

[0002] Upper water gap is one of important components in continuous casting process, and is important connecting device of bearing tundish and immersion type water gap, and upper water gap bowl part cooperates with tundish stopper to realize molten steel control flow in use process.

[0003] Immersion type water gap needs to be sleeved to the upper water gap of tundish, which needs shape matching and certain counterweight to support, but such mode is prone to poor adhesion in production, thereby causing air suction due to gap. Especially when long pouring period changes water gap, molten steel will be adhered in upper water gap bowl, thereby more deteriorating the sealing of water gap and upper water gap, thereby causing water gap to flow, blockage and lead to pouring, and more seriously, it can cause floating steel in crystallizer, weaken protective slag melting, and even subsequent leakage accident. SUMMARY

[0004] The utility model provides a kind of outer hanging immersion type water gap argon protection device to avoid the air suction and leakage problem caused by poor sealing.

[0005] To solve the above technical problem, the utility model adopts the technical scheme that provides a kind of outer hanging immersion type water gap argon protection device, which is arranged on the bowl opening part of the immersion type water gap and the upper water gap of tundish, and includes:

[0006] The annular sealing ring has an annular channel inside, and the outer ring of the annular channel is connected to an argon supply system, and the inner ring is uniformly distributed with 20-26 radial circular holes with a diameter of 2.5-3.5 mm along the circumference.

[0007] The elastic buckle is symmetrically arranged on both sides of the annular sealing ring and is used to fix the sealing ring to the tundish.

[0008] The argon supply system includes an argon main pipe and a quick-connect gas pipe, one end of the quick-connect gas pipe is connected to the argon main pipe, and the other end is in communication with the annular channel.

[0009] Further, in the above-mentioned outer hanging immersion type water gap argon protection device, the inner ring of the annular channel is distributed with 24 radial circular holes with a diameter of 3 mm.

[0010] Further, in the above-mentioned outer hanging immersion type water gap argon protection device, a high-temperature-resistant fluorine rubber sealing ring is arranged between the quick-connect gas pipe and the annular channel.

[0011] Further, the external hanging immersion nozzle argon protection device, the elastic buckle is a hook, and the intermediate ladle is provided with an L-shaped clamping groove corresponding to the hook.

[0012] Further, the external hanging immersion nozzle argon protection device, the elastic buckle is made of high-temperature spring steel material, is coated with an aluminum-based oxidation-resistant coating on the surface, and is provided with anti-skid tooth patterns at the end of the buckle.

[0013] Further, the external hanging immersion nozzle argon protection device, the argon supply system further comprises a pressure sensor and a flow meter, which are respectively installed at the inlet end of the quick-connecting gas pipe, and are used for monitoring the argon pressure and flow in real time.

[0014] Further, the external hanging immersion nozzle argon protection device, the annular sealing ring is made of high-temperature ceramic material, and the cross section of the annular channel is trapezoidal.

[0015] Further, the external hanging immersion nozzle argon protection device, the outer surface of the annular sealing ring is provided with a heat insulation layer.

[0016] Further, the external hanging immersion nozzle argon protection device, the heat insulation layer is aluminum silicate fiber felt.

[0017] Further, the external hanging immersion nozzle argon protection device, the thickness of the heat insulation layer is 3-5mm.

[0018] The beneficial effects of the external hanging immersion nozzle argon protection device of the utility model lie in that the utility model discloses an external hanging immersion nozzle argon protection device, the two sides of the annular sealing ring through which argon passes are installed in a buckle type, which prevents the immersion nozzle from falling during replacement and is convenient for installation and adjustment, and argon is selected as the sealing gas because argon is an inert gas and is not easy to react with molten steel. An argon pipe is connected to the top of the tundish, is connected to the sealing ring of each flow through the quick-connecting gas pipe, and then argon flows to the outer ring of the annular channel, and then flows out through the round holes in the inner ring of the sealing ring, and the argon micro-positive pressure is formed on the immersion nozzle bowl and the upper nozzle of the tundish. The 24 round holes with a diameter of 3mm ensure that argon enters each point in the circular ring, and only a small amount of argon is needed to achieve positive pressure and sealing. The utility model significantly reduces the flocculation flow, floating steel leakage rate and cost of Ti-containing steel, and can be recycled, and more than 60,000 yuan of water nozzle replacement cost is saved every year. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the external hanging immersion nozzle argon protection device of embodiment 1 of the utility model specific implementation mode.

[0020] Figure 2The utility model discloses a related structure schematic diagram of the annular sealing ring of the external hanging immersion type nozzle argon protection device of embodiment 1 of the utility model specific implementation mode.

[0021] Label explanation:

[0022] 1, intermediate package upper nozzle;2, immersion type nozzle;3, annular sealing ring;31, round hole;4, hook;5, L type card slot;6, quick -wired gas pipe. Specific implementation

[0023] In order to explain the technical content of the utility model, the purpose and effect realized, the following is explained in combination with the embodiment and the drawing.

[0024] The utility model provides a kind of external hanging immersion type nozzle argon protection device, is set to the bowl mouth portion of immersion type nozzle and intermediate package upper nozzle relative interface, comprising:

[0025] Annular sealing ring, its inside is equipped with annular channel, the outer ring of annular channel is connected argon supply system, and the inner ring is evenly distributed 20-26 radial round holes of 2.5-3.5mm diameter along circumference;

[0026] Elastic buckle, it is symmetrically set to the both sides of annular sealing ring, for sealing ring is fixed in intermediate package;

[0027] Argon supply system, including argon main pipe and quick -wired gas pipe, one end of quick -wired gas pipe is connected argon main pipe, and other end is communicated with annular channel.

[0028] The utility model has the beneficial effect that the external hanging immersion type nozzle argon protection device of the utility model, the both sides of annular sealing ring with argon adopt buckle type installation, that is to prevent falling when changing nozzle, and it is convenient to install adjustment, and argon is selected as sealing gas, because argon is inert gas, and it is not easy to react with molten steel;From the top of tundish car, a argon pipe is connected, and is connected with the sealing ring of each flow through quick -wired gas pipe, and argon flows to the outer ring of annular channel through gas pipe, and then flows out through the round hole of inner ring of sealing ring, and is formed argon micro positive pressure to immersion type nozzle bowl portion and intermediate package upper nozzle, and 24 designed diameter 3mm round holes guarantee that each point in circular ring has argon to enter, and only micro argon can realize positive pressure, and realize sealing. The utility model significantly reduces the flocculation flow of Ti-containing steel, the floating steel leakage rate, and the cost is low, and can be recycled, and only saves more than 60,000 yuan of nozzle replacement cost due to flocculation flow per year.

[0029] Further, the annular channel of the above-mentioned external hanging immersion type nozzle argon protection device is distributed with 24 radial round holes of 3mm diameter.

[0030] From the above description, through the 24 evenly distributed argon holes (diameter 3mm) in the inner ring of the annular sealing ring, a continuous and stable argon micro-positive pressure (0.05-0.1MPa) is formed, which completely covers the joint area of the nozzle bowl and the upper nozzle of the tundish, effectively isolating air suction. The argon consumption is reduced by 40%, and the sealing uniformity is improved.

[0031] Further, in the above-mentioned externally hung submerged nozzle argon protection device, a high-temperature-resistant fluorine rubber sealing ring is arranged between the quick-connecting gas pipe and the annular channel.

[0032] From the above description, air leakage is avoided, and the utilization rate of argon is improved.

[0033] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the elastic buckle is a hook, and the tundish is provided with an L-shaped clamping groove corresponding to the hook.

[0034] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the elastic buckle is made of high-temperature-resistant spring steel material, and the surface is coated with an aluminum-based oxidation-resistant coating. The buckle end is provided with anti-slip tooth pattern.

[0035] From the above description, the elastic buckle is made of high-temperature-resistant spring steel material, which can adapt to the thermal expansion and contraction of the nozzle and the installation deviation, avoid the displacement or falling of the sealing ring caused by mechanical stress, and ensure the sealing stability during long pouring.

[0036] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the argon supply system further includes a pressure sensor and a flow meter, which are respectively installed at the inlet end of the quick-connecting gas pipe for real-time monitoring of argon pressure and flow.

[0037] From the above description, the pressure sensor and the flow meter real-time monitor the argon pressure and flow, avoid the sealing failure caused by air break, and prevent 8-10 steel leakage accidents per year.

[0038] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the annular sealing ring is made of high-temperature ceramic material, and the cross section of the annular channel is trapezoidal.

[0039] From the above description, the above-mentioned setting improves the service life of the annular sealing ring, and the repeated use reduces the cost.

[0040] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the outer surface of the annular sealing ring is provided with a heat insulation layer.

[0041] Further, in the above-mentioned externally hung submerged nozzle argon protection device, the heat insulation layer is aluminum silicate fiber felt.

[0042] Further, the argon protection device for the externally-hung submerged nozzle has a heat insulation layer with a thickness of 3-5 mm.

[0043] As described above, the heat insulation layer (aluminum silicate fiber felt) reduces the radiant heat loss and lowers the ambient temperature of the tundish by 5-8℃, thus improving the working conditions.

[0044] Embodiment 1

[0045] Please refer to Figure 1 and Figure 2 An argon protection device for an externally-hung submerged nozzle 2 is arranged on the bowl portion of the submerged nozzle 2 opposite to the upper nozzle 1 of the tundish, and comprises:

[0046] A ring-shaped sealing ring 3 has a ring-shaped channel inside, and the outer ring of the ring-shaped channel is connected to an argon supply system, and the inner ring is uniformly distributed with 24 radial circular holes 31 with a diameter of 3 mm along the circumference;

[0047] Elastic buckles are symmetrically arranged on both sides of the ring-shaped sealing ring 3 and used to fix the sealing ring to the tundish;

[0048] The argon supply system comprises an argon main pipe and a quick-connecting gas pipe 6, one end of which is connected to the argon main pipe and the other end of which is in communication with the ring-shaped channel.

[0049] A high-temperature-resistant fluorine rubber sealing ring is arranged between the quick-connecting gas pipe 6 and the ring-shaped channel. The elastic buckle is a hook 4, and the tundish is provided with an L-shaped clamping groove 5 corresponding to the hook 4. The elastic buckle is made of high-temperature-resistant spring steel and coated with an aluminum-based anti-oxidation coating on the surface, and the end of the buckle is provided with anti-slip tooth patterns.

[0050] The use of the argon protection device for the externally-hung submerged nozzle 2 of the utility model is as follows: the ring-shaped sealing ring 3 is hung on the top of the tundish through the elastic buckle, and the position is adjusted to align with the upper nozzle; the externally-hung submerged nozzle 2 is connected to the upper nozzle to ensure that the bowl portion is attached to the inner ring of the ring-shaped sealing ring 3; the quick-connecting gas pipe 6 is connected to the ring-shaped channel of the ring-shaped sealing ring 3, the argon valve is opened, the flow rate is adjusted to a slightly positive pressure state; after pouring is completed, the argon is closed, the elastic buckle is loosened, and the ring-shaped sealing ring 3 is disassembled for cleaning.

[0051] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field according to the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. An argon shield device for a submerged entry nozzle, which is provided on a bowl portion of a submerged entry nozzle that is to be connected to an upper nozzle of a tundish, characterized in that, The application relates to a sealing ring for a tundish, which comprises the following parts: a ring-shaped sealing ring, which is internally provided with a ring-shaped channel, the outer circle of the ring-shaped channel is connected with an argon supply system, and the inner circle is uniformly provided with 20-26 radial circular holes with a diameter of 2.5-3.5 mm along the circumference; elastic buckles, which are symmetrically arranged on the two sides of the ring-shaped sealing ring and are used for fixing the sealing ring on the tundish; an argon supply system, which comprises an argon main pipe and a quick-connection type gas pipe, one end of the quick-connection type gas pipe is connected with the argon main pipe, and the other end is communicated with the ring-shaped channel.

2. The argon shield for an attached submergence nozzle according to claim 1, wherein The inner circle of the ring-shaped channel is uniformly provided with 24 radial circular holes with a diameter of 3 mm.

3. The argon shield for an attached submerge entry nozzle according to claim 1, wherein A high-temperature-resistant fluorine rubber sealing ring is arranged between the quick-connection type gas pipe and the ring-shaped channel.

4. The argon shield for an attached submerge entry nozzle according to claim 1, wherein The elastic buckle is a hook, and the tundish is provided with an L-shaped clamping groove corresponding to the hook.

5. The argon shield for an attached submerge entry nozzle according to claim 1, wherein The elastic buckle is made of high-temperature-resistant spring steel and is coated with an aluminum-based anti-oxidation coating, and the end of the elastic buckle is provided with anti-skid tooth patterns.

6. The argon shield for an attached submerge entry nozzle according to claim 1, wherein The argon supply system further comprises a pressure sensor and a flow meter, which are respectively arranged at the inlet end of the quick-connection type gas pipe and are used for monitoring the argon pressure and flow in real time.

7. The argon shield for an attached submerge entry nozzle according to claim 1, wherein The ring-shaped sealing ring is made of high-temperature-resistant ceramic material, and the cross section of the ring-shaped channel is trapezoidal.

8. The argon shield for a submerged entry nozzle according to claim 1, wherein The outer surface of the ring-shaped sealing ring is provided with a heat insulation layer.

9. The argon shield for an attached submerge entry nozzle according to claim 8, wherein The heat insulation layer is an aluminum silicate fiber felt.

10. The argon shield for an attached submerge entry nozzle according to claim 9, wherein The thickness of the heat insulation layer is 3-5 mm.

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