Gas protection device for molten steel pouring
By designing a steel water watering gas protection device that uses a two -layer ring structure, the gas -watering gas protection device is used to protect the steel water with the air -sided air screen, which solves the problem of the steel water inhaling during the pouring process, and improves the quality of the steel and water composition and the product of the product. stability.
Patent Information
- Application Number
- CN202421173277.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the pouring process, the steel water is prone to inhaling O and N elements in the air, resulting in an increase in the gas content in the steel water, forming pores and irregular inclusions, affecting the quality of the steel.
Design a steel water pouring gas protection device, which uses a double -layer circular structure to protect the work. It is evenly distributed from the outer side of the outer sideways through the ring -shaped pyrine channel to the inner exit of multiple blows to form a air -to -air curtain to protect the steel water. Essence
Effectively reduce the inhalation of steel water during the pouring process, reduce the contact area of air and steel water, ensure the quality of steel water composition, and avoid the production of product defects.
Smart Images
Figure CN222403459U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas injection devices for operation and transportation of metal casting, and in particular relates to a gas protection device for molten steel pouring. Background Art
[0002] As the last and most important link in the production process of steel castings, pouring plays a decisive role in the final quality of molten steel. During the pouring process, the molten steel is directly exposed to the air. The O and N elements in the air can easily enter the molten steel, increasing the gas content in the molten steel, resulting in excessive O in the molten steel. During the solidification process, the solubility of O changes with the decrease in temperature. It will subsequently react with the carbon in the steel to generate CO gas that remains in the steel and forms pores. In addition, when there is a lot of O in the steel, FeO will form FeO.FeS eutectic with FeS in the steel and precipitate along the grain boundaries. Its melting point is 940℃, which is relatively low. It is easy to crack during hot working and reduce the hot working performance of the steel. Excessive presence of N in steel will not only cause aging embrittlement, but also form irregular inclusions with elements such as Al and Ti, deteriorating the mechanical properties of the steel.
[0003] At present, most of the pouring processes do not take relevant measures to protect the molten steel, which has little impact on ordinary steel grades; however, for steel grades with strict requirements on composition and gas content, direct pouring will cause air inhalation during the molten steel pouring process, resulting in unqualified molten steel composition. In this regard, the following technical solutions are proposed. Utility Model Content
[0004] The utility model solves the technical problem of providing a molten steel pouring gas protection device, which is used to solve the molten steel pouring air suction technical problem existing in the molten steel pouring process.
[0005] The utility model adopts the following technical scheme: a gas protection device for molten steel pouring, comprising a ladle, a sliding nozzle mechanism being arranged at the bottom of the ladle; a water outlet being arranged at the center of the sliding nozzle mechanism; a gas protection tooling being arranged concentrically with the water outlet and located at the lower end of the sliding nozzle mechanism; the gas protection tooling having a gas protection structure with a double-layer circular ring structure; an argon blowing interface being arranged at one side of an outer circular ring body of the gas protection structure; a plurality of argon blowing outlets being arranged at an inner circular ring body of the gas protection structure with radially uniform distribution; the argon blowing interface and the argon blowing outlet being connected via an annular argon gas channel.
[0006] Among the above technical solutions, as the preferred technical solution of the utility model: the argon blowing interface and the argon blowing outlet are both conical variable diameter ventilation structures whose diameter decreases from the outside to the inside.
[0007] Among the above technical solutions, as the preferred technical solution of the utility model: the argon blowing interface is concentrically arranged with one of the argon blowing outlets, and the argon blowing interface and the argon blowing outlet form a continuously variable diameter structure.
[0008] Among the above technical solutions, as the preferred technical solution of the utility model: there are 6 to 10 argon blowing outlets.
[0009] Among the above technical solutions, as the preferred technical solution of the utility model: the gas protection tooling has a base with a flat plate structure; the base concentrically welds the gas protection tooling and the sliding nozzle mechanism into one.
[0010] Among the above technical solutions, as the preferred technical solution of the utility model: a gas protection structure with a double-layer circular ring structure is welded and fixedly installed at the lower end of the base.
[0011] The advantages of this utility model compared with the prior art:
[0012] 1. The utility model is installed at the bottom of the sliding nozzle mechanism. The utility model has an outer argon blowing interface and an inner argon blowing outlet, and the argon blowing interface and the argon blowing outlet are connected through an annular argon gas channel to ensure the uniformity of the blowing distribution; after the argon blowing interface is connected to the outer ring argon gas interface, the argon gas is finally discharged from the inner argon blowing outlet and blown out toward the bottom of the nozzle, forming an argon gas curtain protection below the nozzle, thereby protecting the molten steel from direct contact with the air during the pouring process, thereby reducing the molten steel from air absorption, reducing the contact area between the air and the molten steel during the pouring process, ensuring that the composition of the molten steel meets the use requirements, and avoiding the occurrence of product defects.
[0013] 2. The argon blowing interface and the argon blowing outlet of the utility model are both tapered variable diameter ventilation structures with a diameter decreasing from the outside to the inside, which can effectively reduce the resistance and pressure loss of the fluid compared with the cylindrical ventilation structure; at the same time, the argon blowing interface is concentrically arranged with one of the argon blowing outlets, and the argon blowing interface and the argon blowing outlet form a continuous variable diameter structure, which can not only adjust the flow rate of the fluid and improve the flow performance of the fluid; reduce the fluid friction resistance in the pipeline system, reduce pressure loss, and improve the fluid transportation efficiency; and because the fluid flows more smoothly, the friction between the fluid and the inner wall of the ventilation structure is correspondingly reduced, effectively extending the service life of the channel.
[0014] 3. The utility model has 6 to 10 argon blowing outlets. Multiple argon blowing outlets can increase the flow area of the fluid, reduce fluid resistance, and improve fluid transportation efficiency; 6 to 10 argon blowing outlets can disperse the pressure and stress borne by the channel, enhance structural stability, and reduce deformation and rupture risks.
[0015] 4. The base of the utility model welds the gas protection tooling and the sliding nozzle mechanism concentrically into one, and the connection is simple and the welding is firm.
[0016] 5. The gas protection structure of the double-layer circular ring structure of the utility model has readily available materials, is easy to manufacture, and effectively controls costs.
[0017] 6. The utility model can meet the use requirements to the maximum extent and improve efficiency through time control, flow control and pressure control. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is the front view of the utility model;
[0019] Figure 2 This is a bottom view of the utility model;
[0020] In the figure: 1- ladle, 2- sliding nozzle mechanism, 3- down nozzle, 4- gas protection tooling, 4-1 base, 5- argon blowing interface, 6- argon blowing outlet, 7- annular argon gas channel. DETAILED DESCRIPTION
[0021] The following will be combined with the attached embodiment of the present utility model Figure 1-2 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] (like Figure 1 , Figure 2 (As shown) A gas protection device for molten steel pouring comprises a ladle 1, a sliding water gate mechanism 2 is provided at the bottom of the ladle 1; a lower water gate 3 is provided at the center of the sliding water gate mechanism 2.
[0023] In order to solve the technical problem of air suction from the water inlet 3 when pouring molten steel, a gas protection tooling 4 is provided concentric with the water inlet 3 and located at the lower end of the sliding water inlet mechanism 2.
[0024] The gas protection tooling 4 has a gas protection structure with a double-layer circular ring structure.
[0025] An argon blowing interface 5 is formed on one side of the outer annular body of the gas protection structure; the argon blowing interface 5 is used to connect an external argon gas tank through a pipeline interface and a pipeline.
[0026] The inner annular body of the gas protection structure is evenly distributed with a plurality of argon blowing outlets 6 in the radial direction; the argon blowing outlets 6 are used to discharge argon gas evenly in the radial direction of the gas protection tooling 4 so as to form an argon gas curtain protection below the water outlet 3 .
[0027] The argon blowing interface 5 is connected to the argon blowing outlet 6 through an annular argon gas channel 7. The annular argon gas channel 7 is provided to ensure that the argon gas is eventually discharged from the multiple argon blowing outlets 6, and in particular, to ensure the uniformity of the outlet argon gas pressure distribution.
[0028] In the above embodiment, as the preferred technical solution of the utility model: the argon blowing interface 5 and the argon blowing outlet 6 are both tapered variable diameter ventilation structures with a decreasing diameter from the outside to the inside. The tapered variable diameter ventilation structure can effectively reduce the resistance and pressure loss of the fluid compared with the cylindrical ventilation structure.
[0029] In the above embodiment, as the preferred technical solution of the utility model: the argon blowing interface 5 is concentrically arranged with one of the argon blowing outlets 6, and the argon blowing interface 5 and the argon blowing outlet 6 form a continuously variable diameter structure. The concentric arrangement improves the gas conduction efficiency. The continuously variable diameter structure can not only adjust the flow rate of the fluid and improve the flow performance of the fluid; reduce the fluid friction resistance in the channel system, reduce pressure loss, and improve the fluid delivery efficiency; and because the fluid flows more smoothly, the friction between the fluid and the inner wall of the ventilation structure is correspondingly reduced, which effectively extends the service life of the channel.
[0030] In the above embodiment, as the preferred technical solution of the utility model, the argon blowing outlets 6 have 6 to 10. The utility model has 6 to 10 argon blowing outlets 6. Multiple argon blowing outlets 6 can increase the flow area of the fluid, reduce fluid resistance, and improve fluid delivery efficiency; 6 to 10 argon blowing outlets 6 can disperse the pressure and stress borne by the channel, enhance structural stability, and reduce the risk of channel deformation and rupture.
[0031] In the above embodiment, as the preferred technical solution of the utility model: the gas protection tooling 4 has a base 4-1 of a flat plate structure; the base 4-1 welds the gas protection tooling 4 and the sliding nozzle mechanism 2 concentrically as a whole. The base 4-1 of the utility model welds the gas protection tooling 4 and the sliding nozzle mechanism 2 concentrically as a whole, which is simple to connect and firmly welded.
[0032] In the above embodiment, as the preferred technical solution of the utility model: the lower end of the base 4-1 is welded and fixed with a double-layer circular ring structure gas protection structure. The double-layer circular ring structure gas protection structure of the utility model has easy-to-obtain materials, is easy to manufacture, and is conducive to cost control.
[0033] The utility model can meet the use requirements to the maximum extent and improve the efficiency through time control, flow control and pressure control.
[0034] The working principle of the utility model is as follows: the utility model is installed at the bottom of the sliding nozzle mechanism 2, and the utility model has an outer argon blowing interface 5 and an inner argon blowing outlet 6, and the argon blowing interface 5 and the argon blowing outlet 6 are connected through an annular argon gas channel 7 to ensure the uniformity of the blowing distribution; after the argon blowing interface 5 is connected to the outer ring argon gas interface, the argon gas is finally discharged from the inner argon blowing outlet 6 and blown out toward the bottom of the lower nozzle 3, forming an argon gas curtain protection below the lower nozzle 3, thereby protecting the molten steel from direct contact with the air during the pouring process, thereby reducing the molten steel's air absorption, reducing the contact area between the air and the molten steel during the pouring process, ensuring that the molten steel composition meets the requirements, and avoiding the occurrence of product defects.
[0035] Moreover, the argon blowing interface 5 and the argon blowing outlet 6 of the utility model are both tapered variable diameter ventilation structures whose diameter decreases from the outside to the inside, which can effectively reduce the resistance and pressure loss of the fluid compared with the cylindrical ventilation structure; at the same time, the argon blowing interface 5 is concentrically arranged with one of the argon blowing outlets 6, and the argon blowing interface 5 and the argon blowing outlet 6 form a continuous variable diameter structure, which can not only adjust the flow rate of the fluid and improve the flow performance of the fluid; reduce the fluid friction resistance in the pipeline system, reduce the pressure loss, and improve the fluid transportation efficiency; because the fluid flows more smoothly, the friction between the fluid and the inner wall of the ventilation structure is correspondingly reduced, which effectively extends the service life of the channel.
[0036] In summary, the utility model solves the technical problem of molten steel pouring air intake during the molten steel pouring process; after the argon blowing interface 5 is connected to the outer ring argon interface, the argon gas is finally discharged from the inner argon blowing outlet 6, and an argon gas curtain protection is formed below the water outlet 3, which protects the molten steel from direct contact with the air, reduces the molten steel intake, ensures that the molten steel composition meets the requirements, and avoids the occurrence of product defects.
[0037] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims
1. A gas protection device for molten steel pouring, comprising a ladle (1), wherein a sliding gate mechanism (2) is provided at the bottom of the ladle (1); a lower gate (3) is provided at the center of the sliding gate mechanism (2); and the characteristics are: A gas protection tool (4) is provided concentrically with the water outlet (3) and located at the lower end of the sliding water outlet mechanism (2); the gas protection tool (4) has a gas protection structure with a double-layer circular ring structure; an argon blowing interface (5) is formed on one side of the outer circular ring body of the gas protection structure; a plurality of argon blowing outlets (6) are evenly distributed radially on the inner circular ring body of the gas protection structure; the argon blowing interface (5) and the argon blowing outlet (6) are connected through an annular argon gas channel (7).
2. The molten steel pouring gas protection device according to claim 1, characterized in that: The argon blowing interface (5) and the argon blowing outlet (6) are both conical variable diameter ventilation structures with a diameter that decreases from the outside to the inside.
3. The molten steel pouring gas protection device according to claim 2, characterized in that: The argon blowing interface (5) is arranged concentrically with one of the argon blowing outlets (6), and the argon blowing interface (5) and the argon blowing outlet (6) form a continuously variable diameter structure.
4. The molten steel pouring gas protection device according to claim 1, 2 or 3, characterized in that: The number of the argon blowing outlets (6) is 6 to 10.
5. The molten steel pouring gas protection device according to claim 1, characterized in that: The gas protection tooling (4) has a base (4-1) with a flat plate structure; the base (4-1) is used to weld the gas protection tooling (4) and the sliding nozzle mechanism (2) together as a whole.
6. The molten steel pouring gas protection device according to claim 5, characterized in that: A gas protection structure with a double-layer circular ring structure is welded and fixedly installed at the lower end of the base (4-1).