Argon blowing device

Abstract

The utility model discloses an argon blowing device which comprises an argon blowing main body, and the argon blowing main body is used for being placed on the upper portion of a tundish cover casting flow hole and can clamp the position of a long nozzle. A cavity is arranged in the argon blowing main body, the argon blowing main body is provided with an air inlet for argon to enter and a through hole for clamping the long nozzle, the hole wall of the through hole is provided with a first air outlet hole, the bottom end surface of the argon blowing main body is provided with a second air outlet hole, and the air inlet is respectively communicated with the first air outlet hole and the second air outlet hole; argon can form a first gas seal between the first gas outlet hole and the long nozzle, and argon can form a second gas seal between the second gas outlet hole and the middle ladle cover main flow hole. The argon blowing device can effectively reduce the phenomenon that air is sucked into the gap position between the long nozzle and the tundish cover casting flow hole in the continuous casting process, so that secondary oxidation of molten steel and the nitrogen content in the molten steel are effectively reduced, the cleanliness of the molten steel is improved, and finally the toughness, plasticity, weldability and other performance of steel are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting, in particular to an argon blowing device. Background Art

[0002] During continuous casting, when molten steel flows from the ladle into the tundish through the long nozzle, due to a large gap between the long nozzle and the casting hole of the tundish cover, negative pressure will be generated when the molten steel flows into the tundish, causing external air to be sucked into the tundish. The above reasons cause the molten steel to contact with air during pouring, resulting in secondary oxidation of the molten steel and an increase in the nitrogen content in the molten steel, thereby affecting the properties such as toughness, plasticity, and weldability of the steel.

[0003] Therefore, how to reduce the amount of air sucked in during continuous casting to improve the cleanliness of the molten steel is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an argon blowing device, which can reduce the amount of air sucked in during continuous casting, thereby improving the cleanliness of the molten steel.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An argon blowing device includes an argon blowing main body, which is used to be placed above the casting hole of the tundish cover and can clamp the position of the long nozzle;

[0007] A cavity is arranged in the argon blowing main body, and an air inlet for argon to enter and a through hole for clamping the long nozzle are arranged on the argon blowing main body. A first air outlet hole is arranged on the hole wall of the through hole, and a second air outlet hole is arranged on the bottom end surface of the argon blowing main body. The air inlet is respectively communicated with the first air outlet hole and the second air outlet hole;

[0008] The argon can form a first air seal between the first air outlet hole and the long nozzle, and the argon can form a second air seal between the second air outlet hole and the main casting hole of the tundish cover.

[0009] Optionally, there are multiple first air outlet holes, which are uniformly arranged along the hole wall of the through hole;

[0010] There are multiple second air outlet holes, which are uniformly arranged in a ring along the bottom end surface of the argon blowing main body.

[0011] Optionally, the argon blowing main body includes a first argon blowing part and a second argon blowing part. A first concave groove is arranged on the first argon blowing part, and a second concave groove is arranged on the second argon blowing part. The first concave groove and the second concave groove are combined to form the through hole.

[0012] Optionally, one end of the first argon blowing part and the second argon blowing part is rotatably connected through a rotating shaft, and the other end can be opened and fastened.

[0013] Optionally, there are two air inlets, which are respectively arranged on the first argon blowing part and the second argon blowing part;

[0014] The first air outlet holes are in two groups, and are respectively arranged on the first argon blowing part and the second argon blowing part;

[0015] The second air outlet holes are in two groups, and are respectively arranged on the first argon blowing part and the second argon blowing part.

[0016] Optionally, it further includes:

[0017] A connecting mechanism, including a first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the first argon blowing part, and one end of the second connecting rod is connected to the second argon blowing part;

[0018] A driving mechanism, including a driving seat and a driving rod. The driving rod is respectively connected to the first connecting rod and the second connecting rod.

[0019] Optionally, both the first connecting rod and the second connecting rod are connected to the driving rod through pin shafts.

[0020] Optionally, it further includes a fixing frame. One end of the fixing frame is connected to the driving mechanism, and the other end is connected to the first argon blowing part or the second argon blowing part.

[0021] Optionally, a connecting pin for connecting with a manipulator is further arranged on the fixing frame, and the manipulator can place the argon blowing device at a preset position.

[0022] Optionally, the fixing frame includes a main board, a first support plate and a second support plate. Both the first support plate and the second support plate are perpendicularly connected to the main board. The driving mechanism is connected to the first support plate, and the second support plate is connected to the argon blowing main body

[0023] As can be seen from the above technical solutions, during the argon blowing operation in the continuous casting process, first, connect the air inlet to the argon gas pipeline. At the starting pouring stage after the ladle, long nozzle, and tundish are fixed in position, place the argon blowing device above the casting hole of the tundish cover and at a position where the long nozzle can be clamped. At this time, the long nozzle is placed in the through hole of the argon blowing main body, and the casting hole of the tundish cover is placed on the bottom end surface of the argon blowing main body. Among them, argon gas enters from the air inlet, passes through the cavity of the argon blowing device, and flows out from the first air outlet hole and the second air outlet hole. A first airtight seal is formed between the first air outlet hole and the long nozzle, and a second airtight seal is formed between the second air outlet hole and the casting hole of the tundish cover, thereby realizing the protected pouring of molten steel. The argon blowing device disclosed in the embodiment of the present invention can effectively reduce the phenomenon that air is sucked into the gap between the long nozzle and the casting hole of the tundish cover during the continuous casting process, thereby effectively reducing the secondary oxidation of molten steel and the nitrogen content in the molten steel, improving the cleanliness of the molten steel, and ultimately improving the properties such as toughness, plasticity, and weldability of the steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0025] Figure 1 Structural schematic diagram of the closed state of the argon blowing device disclosed in the embodiment of the present invention;

[0026] Figure 2 Front view of the argon blowing device disclosed in the embodiment of the present invention;

[0027] Figure 3 Top view of the argon blowing device disclosed in the embodiment of the present invention;

[0028] Figure 4 Bottom view of the argon blowing device disclosed in the embodiment of the present invention;

[0029] Figure 5 Structural schematic diagram of the open state of the argon blowing device disclosed in the embodiment of the present invention.

[0030] Reference numerals:

[0031] 100. Argon blowing main body; 101. Air inlet; 102. Through hole; 103. First air outlet hole; 104. Second air outlet hole; 105. First argon blowing part; 106. Second argon blowing part; 107. Rotating shaft; 200. Connecting mechanism; 201. First connecting rod; 202. Second connecting rod; 300. Driving mechanism; 301. Driving seat; 302. Driving rod; 400. Fixing bracket; 401. Main board; 402. First support plate; 403. Second support plate; 404. Connecting pin. Detailed implementation manner

[0032] In view of this, the core of the present utility model is to provide an argon blowing device, which can reduce the air intake amount during continuous casting, thereby improving the cleanliness of molten steel.

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model. Please refer to Figures 1 to 5 .

[0034] Please refer to Figure 1 , the argon blowing device disclosed in the embodiment of the present utility model includes an argon blowing main body 100, and the argon blowing main body 100 is used to be placed on the upper part of the tundish cover casting hole and can clamp the position of the long nozzle.

[0035] Among them, a cavity is provided in the argon blowing main body 100, an air inlet 101 for argon to enter and a through hole 102 for clamping the long nozzle are opened on the argon blowing main body 100, a first air outlet hole 103 is opened on the hole wall of the through hole 102, a second air outlet hole 104 is opened on the bottom end surface of the argon blowing main body 100, and the air inlet 101 is respectively communicated with the first air outlet hole 103 and the second air outlet hole 104.

[0036] Argon can form a first air seal between the first air outlet hole 103 and the long nozzle, and argon can form a second air seal between the second air outlet hole 104 and the tundish cover main hole.

[0037] During the argon blowing operation in the continuous casting process, first, connect the air inlet 101 to the argon gas pipeline. At the starting pouring stage after the ladle, long nozzle, and tundish are fixed in place, place the argon blowing device above the casting hole of the tundish cover and at a position where it can clamp the long nozzle. At this time, the long nozzle is placed inside the through hole 102 of the argon blowing main body 100, and the casting hole of the tundish cover is placed on the bottom end surface of the argon blowing main body 100. Among them, argon gas enters from the air inlet 101, passes through the cavity of the argon blowing device, and flows out from the first air outlet hole 103 and the second air outlet hole 104. A first airtight seal is formed between the first air outlet hole 103 and the long nozzle, and a second airtight seal is formed between the second air outlet hole 104 and the casting hole of the tundish cover, thereby realizing the protected pouring of molten steel. The argon blowing device disclosed in the embodiment of the present utility model can effectively reduce the phenomenon that air is inhaled at the gap position between the long nozzle and the casting hole of the tundish cover during the continuous casting process, thereby effectively reducing the secondary oxidation of molten steel and the nitrogen content in the molten steel, improving the cleanliness of the molten steel, and ultimately improving the properties such as toughness, plasticity, and weldability of the steel.

[0038] In order to improve the effect of the airtight seal during the pouring of molten steel, in the argon blowing device disclosed in the embodiment of the present utility model, preferably, the first air outlet hole 103 is provided in multiple numbers and is evenly arranged along the inner wall of the through hole 102, and the second air outlet hole 104 is provided in multiple numbers and is evenly arranged in a ring shape along the bottom end surface of the argon blowing main body 100.

[0039] The embodiment of the present utility model does not limit the shape of the disclosed argon blowing main body 100, and any structure that meets the usage requirements of the present utility model is within the protection scope of the present utility model.

[0040] Among them, the argon blowing main body 100 can be circular, can be rectangular, and of course can also be other irregular shapes, which can be selected by those skilled in the art according to actual needs.

[0041] As a preference, the argon blowing main body 100 disclosed in the embodiment of the present utility model is circular.

[0042] The argon blowing main body 100 disclosed in the embodiment of the present utility model can be an integral structure or a split structure, and any structure that meets the usage requirements of the present utility model is within the protection scope of the present utility model.

[0043] As one of the embodiments, the argon blowing main body 100 disclosed in the embodiment of the present utility model includes a first argon blowing part 105 and a second argon blowing part 106. Among them, a first concave groove is provided on the first argon blowing part 105, a second concave groove is provided on the second argon blowing part 106, and the first concave groove and the second concave groove are combined to form the through hole 102.

[0044] It should be noted that one end of the first argon blowing part 105 and the second argon blowing part 106 is rotationally connected through a rotating shaft 107, and the other end can be opened and latched. With such a setting, the argon blowing operation can be carried out and the argon blowing device can be retracted at any time during the continuous casting process without affecting the processes such as adding covering agent and protective slag during the continuous casting process.

[0045] Among them, when the argon blowing main body 100 is set as a split structure, two air inlets 101 are provided and are respectively arranged on the first argon blowing part 105 and the second argon blowing part 106.

[0046] Correspondingly, two groups of first air outlet holes 103 are provided and are respectively arranged on the first argon blowing part 105 and the second argon blowing part 106, and two groups of second air outlet holes 104 are provided and are respectively arranged on the first argon blowing part 105 and the second argon blowing part 106.

[0047] Among them, the opening and closing of the first argon blowing part 105 and the second argon blowing part 106 can be automatically controlled or manually controlled.

[0048] In order to improve work efficiency, the argon blowing device disclosed in the embodiment of the present utility model preferably adopts an automatic control method.

[0049] Specifically, the argon blowing device further includes a connecting mechanism 200 and a driving mechanism 300. Among them, the connecting mechanism 200 includes a first connecting rod 201 and a second connecting rod 202. One end of the first connecting rod 201 is connected to the first argon blowing part 105, and one end of the second connecting rod 202 is connected to the second argon blowing part 106.

[0050] The driving mechanism 300 includes a driving seat 301 and a driving rod 302. The driving rod 302 is respectively connected to the other ends of the first connecting rod 201 and the second connecting rod 202.

[0051] Specifically, the driving rod 302 is connected to the other ends of the first connecting rod 201 and the second connecting rod 202 through a pin shaft.

[0052] When the driving mechanism 300 is started, the driving rod 302 of the driving mechanism 300 extends out, pushing the first connecting rod 201 and the second connecting rod 202 forward, so that the angles of the first connecting rod 201 and the second connecting rod 202 increase, thereby driving the first argon blowing part 105 and the second argon blowing part 106 to open. Please refer to Figure 5 , Figure 5 for the open state of the argon blowing main body 100.

[0053] When the driving mechanism 300 is closed, the driving rod 302 of the driving mechanism 300 retracts, pulling the first connecting rod 201 and the second connecting rod 202 backward, so that the angles of the first connecting rod 201 and the second connecting rod 202 decrease, thereby driving the first argon blowing part 105 and the second argon blowing part 106 to close. Please refer toFigure 1 , Figure 1 is the closed state of the argon blowing main body 100.

[0054] As a further embodiment, the argon blowing device disclosed in the embodiment of the present invention further includes a fixing frame 400, wherein one end of the fixing frame 400 is connected to the driving mechanism 300, and the other end is connected to the first argon blowing part 105 or the second argon blowing part 106.

[0055] Wherein, a connecting pin for connecting with a manipulator is further arranged on the fixing frame 400, and the manipulator can drive the argon blowing device to place the argon blowing device at a preset position, so as to realize the automatic control of the argon blowing device.

[0056] The embodiment of the present invention does not limit the specific structure of the fixing frame 400, and any structure that meets the use requirements of the present invention is within the protection scope of the present invention.

[0057] As one of the embodiments, the fixing frame 400 disclosed in the embodiment of the present invention includes a main board 401, a first support board 402 and a second support board 403. Both the first support board 402 and the second support board 403 are vertically connected to the main board 401. The driving mechanism 300 is connected to the first support board 402, and the second support board 403 is connected to the argon blowing main body 100.

[0058] Wherein, the second support board 403 can be connected to the first argon blowing part 105 or the second argon blowing part 106.

[0059] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0060] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0061] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein. Finally, it should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0062] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An argon blowing device, characterized in that, It includes an argon-blowing main body which is used to be placed above the casting hole of the tundish cover and can clamp the position of the long nozzle. A cavity is arranged inside the argon-blowing main body. An air inlet for argon to enter and a through hole for clamping the long nozzle are formed on the argon-blowing main body. First air outlet holes are formed on the hole wall of the through hole, and second air outlet holes are formed on the bottom end face of the argon-blowing main body. The air inlet is respectively communicated with the first air outlet holes and the second air outlet holes. The argon can form a first air seal between the first air outlet holes and the long nozzle, and the argon can form a second air seal between the second air outlet holes and the main flow hole of the tundish cover.

2. The argon blowing device according to claim 1, characterized in that, There are multiple first air outlet holes which are evenly arranged along the hole wall of the through hole. There are multiple second air outlet holes which are evenly arranged in a ring along the bottom end face of the argon-blowing main body.

3. The argon blowing device according to claim 1, characterized in that The argon-blowing main body includes a first argon-blowing part and a second argon-blowing part. A first concave groove is arranged on the first argon-blowing part, and a second concave groove is arranged on the second argon-blowing part. The first concave groove and the second concave groove are combined to form the through hole.

4. The argon blowing device according to claim 3, wherein One ends of the first argon-blowing part and the second argon-blowing part are rotationally connected through a rotating shaft, and the other ends can be opened and buckled.

5. The argon blowing device according to claim 3, characterized in that, There are two air inlets which are respectively arranged on the first argon-blowing part and the second argon-blowing part. The first air outlet holes are in two groups and are respectively arranged on the first argon-blowing part and the second argon-blowing part. The second air outlet holes are in two groups and are respectively arranged on the first argon-blowing part and the second argon-blowing part.

6. The argon blowing device according to claim 3, wherein It also includes: A connecting mechanism which includes a first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the first argon-blowing part, and one end of the second connecting rod is connected to the second argon-blowing part. A driving mechanism which includes a driving seat and a driving rod. The driving rod is respectively connected to the first connecting rod and the second connecting rod.

7. The argon blowing device according to claim 6, characterized in that, Both the first connecting rod and the second connecting rod are connected to the driving rod through pin shafts.

8. The argon blowing device according to claim 6, characterized in that, It also includes a fixing frame. One end of the fixing frame is connected to the driving mechanism, and the other end is connected to the first argon-blowing part or the second argon-blowing part.

9. The argon blowing device according to claim 8, characterized in that, A connecting pin for connecting with a manipulator is also arranged on the fixing frame. The manipulator can place the argon-blowing device at a preset position.

10. The argon blowing device according to claim 8, characterized in that, The fixing frame includes a main board, a first support board and a second support board. The first support board and the second support board are both vertically connected to the main board. The driving mechanism is connected to the first support board, and the second support board is connected to the argon-blowing main body.

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