Ladle long nozzle
By introducing an inlet pipe and a transmission pipe into the long nozzle of the ladle to form a positive pressure argon gas protection ring, the problem of unstable nitrogen addition in molten steel caused by poor sealing was solved, achieving better inert gas protection effect and sealing stability.
Patent Information
- Application Number
- CN202423051658.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing long nozzle of the steel ladle suffers from poor sealing due to the peeling of the inner wall material during use, resulting in unstable nitrogen addition in the molten steel and poor inert gas protection.
A gas sealing assembly comprising an inlet pipe, a conduction pipe, and an annular sealing groove was designed. A gas protective ring is formed by positive pressure argon gas to prevent external gas from entering and ensure the sealing effect of the bowl-shaped mating groove.
It effectively improves the inert gas protection effect of molten steel from ladle to tundish, reduces the fluctuation of nitrogen addition in molten steel, and ensures the stability of the seal and the uniformity of gas protection.
Smart Images
Figure CN223572004U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of steel smelting, and particularly relates to a long nozzle for a ladle. BACKGROUND
[0002] The long nozzle is used for sealing protection of the molten steel from the ladle to the tundish, to prevent the molten steel from being absorbed. In actual use, material peeling occurs on the inner wall of the bowl of the long nozzle after multiple uses, which leads to poor sealing at the joint and absorption of the molten steel. Although the top of the long nozzle is wrapped with iron sheet, argon is blown through the gap, which has a certain inert gas protection effect, but the gas is not uniformly discharged from the gap, the flow is small and dispersed, and the inert gas protection effect is not good.
[0003] The sealing mode of the long nozzle makes the nitrogen increase in the molten steel from the ladle to the tundish be large and unstable. After the long nozzle is used for two to three furnaces, the nitrogen increase in the molten steel from the ladle to the tundish is about 5-7 PPM under the condition that the sealing ring is properly nested and the argon flow is suitable. After the long nozzle is used for multiple times, the nitrogen increase in the molten steel from the ladle to the tundish can reach 10-15 PPM due to material peeling on the inner wall of the bowl, poor sealing, and other adverse conditions such as damage to the sealing ring or small argon flow through the gap of the iron sheet. Sometimes, the nitrogen increase in the molten steel from the ladle to the tundish even reaches more than 20 PPM.
[0004] Therefore, a new long nozzle for a ladle is needed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0005] In view of the deficiencies of the prior art, the utility model provides a long nozzle for a ladle, which has the advantages of maintaining a positive pressure of sealing gas inside the sealing part, and solves the problem of poor sealing of the prior art.
[0006] The long nozzle for a ladle of the utility model comprises a long nozzle body, a sealing part is arranged at the top of the long nozzle body, a bowl mouth docking groove for docking the lower nozzle of the upper ladle is arranged at the top of the sealing part, and a gas sealing assembly is arranged on the sealing part;
[0007] The gas sealing assembly comprises an air inlet pipe, a conducting pipe, an annular sealing groove for forming a positive pressure seal between the lower nozzle of the upper ladle and the bowl mouth docking groove, and a sealing ring, which are arranged on the sealing part, the annular sealing groove is arranged around the center of the bowl mouth docking groove, and the air inlet pipe is arranged on the outside of the sealing part.
[0008] The conducting pipe is embedded in the inside of the sealing part to communicate the air inlet pipe with the annular sealing groove.
[0009] In some embodiments, the gas sealing assembly comprises a plurality of gas inlet pipes and conducting pipes in one-to-one correspondence, the ends of the plurality of conducting pipes are in communication with the annular sealing groove, and the plurality of conducting pipes are uniformly distributed on the annular sealing groove, and the plurality of gas inlet pipes are installed on the outer side of the sealing part in one-to-one correspondence with the conducting pipes.
[0010] In some embodiments, the gas outlet end of the conducting pipe forms an angle a with the tangent of the annular sealing groove.
[0011] In some embodiments, the gas outlet end of the conducting pipe coincides with the tangent of the annular sealing groove.
[0012] The outer side wall of the conducting pipe coincides with the tangent of the annular sealing groove, and an arc-shaped gas outlet groove is formed in front of the gas outlet end of the conducting pipe.
[0013] In some embodiments, the gas sealing assembly further comprises a ring-shaped pipe with a diameter larger than the sealing part and a guide pipe installed on the ring-shaped pipe.
[0014] The plurality of gas inlet pipes are installed on the ring-shaped pipe, and the ends of the gas inlet pipes away from the conducting pipes are fixedly connected with gas guide pipes, the ends of the plurality of gas guide pipes away from the gas inlet pipes are hidden in the ring-shaped pipe and extend out of the guide pipe to be in communication with the argon injection system.
[0015] In some embodiments, the sealing ring is made of aluminum silicate fiber.
[0016] Compared with the prior art, the utility model has the advantages that:
[0017] 1. The argon gas enters the annular sealing groove through the gas inlet pipe and the conducting pipe, so that the argon gas is gathered in the annular sealing groove, a gas protection ring with a pressure higher than that of the outside is formed in the bowl butt joint groove, so that the external gas is blocked from entering, and a good sealing effect is achieved.
[0018] 2. The gas outlet end of the conducting pipe forms an angle a with the tangent of the annular sealing groove, which can guide the argon gas to flow in the annular sealing groove, form a flowing gas protection ring in the annular sealing groove, and form a vortex-shaped gas curtain between the bowl butt joint groove and the upper ladle lower water inlet after the argon gas overflowing the annular sealing groove, so as to further ensure the air-tight effect. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:
[0020] Figure 1 It is a front view structure schematic diagram of the first embodiment;
[0021] Figure 2 A schematic view of a cross-sectional structure of the annular sealing groove in Example 1;
[0022] Figure 3 A schematic view of a cross-sectional structure in which the tangent of the conducting pipe and the annular sealing groove forms an angle a in Example 2;
[0023] Figure 4 A schematic view of a cross-sectional structure in which the tangent of the conducting pipe and the annular sealing groove coincides in Example 2;
[0024] Figure 5 A schematic view of a structure in Example 3.
[0025] In the figure: 1, long nozzle body; 2, sealing part; 21, bowl mouth butt joint groove; 3, upper ladle lower nozzle; 4, gas sealing assembly; 41, gas inlet pipe; 42, conducting pipe; 43, annular sealing groove; 44, annular pipe; 45, gas guide pipe; 46, guide pipe; 47, arc-shaped gas outlet groove; 5, sealing ring. DETAILED DESCRIPTION
[0026] In the following, multiple embodiments of the present application will be disclosed with reference to the drawings. For the purpose of clear illustration, many details of the embodiments will be described in the following description. However, it should be understood that these details of the embodiments should not be used to limit the present application. That is, in some embodiments of the present application, these details of the embodiments are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.
[0027] In addition, in the present application, the description such as "first", "second", etc. is only for the purpose of description, and does not particularly mean the order or sequence, nor is it used to limit the present application. It is merely used to distinguish the components or operations described with the same technical terms, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0028] Example 1:
[0029] Please refer to Figure 1 - Figure 2The utility model discloses a ladle long shuikou, including long shuikou body 1, the top of long shuikou body 1 is equipped with sealing part 2, the top of sealing part 2 is equipped with the bowl mouth butt joint groove 21 for the butt joint of upper ladle downwater 3, be equipped with gas seal assembly 4 on sealing part 2,
[0030] Gas seal assembly 4 includes the gas inlet pipe 41, the conducting pipe 42 for making upper ladle downwater 3 and bowl mouth butt joint groove 21 form annular sealing groove 43 of positive pressure sealing of installation on sealing part 2, and sealing ring 5, annular sealing groove 43 surrounds the central part of bowl mouth butt joint groove 21 and is equipped with,
[0031] Gas inlet pipe 41 is installed on the outside of sealing part 2, and conducting pipe 42 is embedded in the inside of sealing part 2 for making gas inlet pipe 41 and annular sealing groove 43 communicate,
[0032] Further, the width of annular sealing groove 43 is 4mm, and the depth is 5mm.
[0033] In the embodiment,
[0034] First, make bowl mouth butt joint groove 21 in sealing part 2 directly into upper ladle downwater 3, make gas inlet pipe 41 in gas seal assembly 4 and argon injection system communicate, then set the input of protective argon to pressure 0.3MPa;Make argon enter annular sealing groove 43 through gas inlet pipe 41 and conducting pipe 42, so that argon gathers in annular sealing groove 43, and form the gas protection ring higher than the outside pressure in bowl mouth butt joint groove 21, so as to block the external gas from entering, so as to achieve good sealing effect.
[0035] In the embodiment, a small amount of material peeling occurs on the inner wall of bowl mouth butt joint groove 21 each time the long shuikou is used, however, the main protection structure is annular sealing groove 43 in the embodiment, and the width of annular sealing groove 43 is 4mm, and the depth is 5mm;The erosion caused by single use of long shuikou only makes annular sealing groove 43 shallower, so that the gas protection ring higher than the outside in bowl mouth butt joint groove 21 is effectively ensured before annular sealing groove 43 becomes shallow;Tracking shows that the effective storage time of new long shuikou annular sealing groove 43 is more than 8 times.
[0036] Embodiment two,
[0037] Please refer to Figure 3 And Figure 4 As a further improvement of embodiment one, in order to stabilize the gas inlet of bowl mouth butt joint groove 21, gas seal assembly 4 includes a plurality of one-to-one corresponding gas inlet pipes 41 and conducting pipes 42, the ends of the plurality of conducting pipes 42 are in communication with annular sealing groove 43, and the plurality of conducting pipes 42 are evenly distributed on annular sealing groove 43, and the plurality of gas inlet pipes 41 are installed on the outside of sealing part 2 one-to-one corresponding to the conducting pipes 42.
[0038] In this embodiment, through the plurality of gas inlet pipes 41 and the conducting pipe 42, the stability of the local pressure of the argon in the annular sealing groove 43 is effectively ensured, and a more stable gas protection ring can be formed relative to the first embodiment;
[0039] Specifically, the outlet end of the conducting pipe 42 forms an angle a with the tangent of the annular sealing groove 43; the argon can be guided to flow in the annular sealing groove 43, and a flowing gas protection ring is formed in the annular sealing groove 43, and the flowing of the gas protection ring causes the argon to overflow the annular sealing groove 43 to form a vortex-shaped gas curtain between the bowl mouth butt joint groove 21 and the upper ladle lower water gap 3, thereby further ensuring the air-tight effect.
[0040] Further, the outlet end of the conducting pipe 42 coincides with the tangent of the annular sealing groove 43; the outer side wall of the conducting pipe 42 coincides with the tangent of the annular sealing groove 43, and an arc-shaped gas outlet groove 47 is arranged in front of the outlet end of the conducting pipe 42; the argon can be further guided to flow along the annular sealing groove 43 after the argon flows out of the outlet end of the conducting pipe 42, thereby further ensuring the stability of the gas protection ring in the annular sealing groove 43 and the vortex-shaped gas curtain.
[0041] Embodiment three:
[0042] Please refer to Figure 5 As a further improvement of the second embodiment, the gas sealing assembly 4 further comprises an annular pipe 44 with a larger diameter than the sealing part 2 and a guide pipe 46 mounted on the annular pipe 44.
[0043] The plurality of gas inlet pipes 41 are mounted on the annular pipe 44, and the gas inlet pipes 41 are fixedly connected with gas guide pipes 45 at the ends away from the conducting pipe 42, and the ends of the plurality of gas guide pipes 45 away from the gas inlet pipes 41 are hidden in the annular pipe 44 and extend out of the guide pipe 46 to be in communication with the argon injection system.
[0044] In this embodiment:
[0045] Through the arrangement of the annular pipe 44 and the guide pipe 46, the gas guide pipe for injecting argon into the gas inlet pipe 41 can be effectively constrained, the equipment is kept clean, the connection difficulty of the gas inlet pipe 41 and the argon injection system is reduced, and the gas inlet pipe 41 does not need to be moved around the lower water gap; and the gas guide pipes 45 can be gathered on one guide pipe and connected with the argon injection system through one joint, thereby avoiding the problem that the plurality of gas inlet pipes 41 need to be connected with the argon injection system multiple times.
[0046] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A ladle shroud comprising a shroud body (1), characterised in that: The top of the long nozzle body (1) is provided with a sealing part (2), the top of the sealing part (2) is provided with a bowl mouth butt joint groove (21) for butt joint with the upper ladle nozzle (3), and the sealing part (2) is provided with a gas sealing assembly (4); The gas sealing assembly (4) comprises an air inlet pipe (41) installed on the sealing part (2), a conducting pipe (42), an annular sealing groove (43) for forming positive pressure sealing between the upper ladle nozzle (3) and the bowl mouth butt joint groove (21), and a sealing ring (5), and the annular sealing groove (43) surrounds the center of the bowl mouth butt joint groove (21); The air inlet pipe (41) is installed on the outside of the sealing part (2), and the conducting pipe (42) is embedded in the inside of the sealing part (2) to communicate the air inlet pipe (41) with the annular sealing groove (43).
2. A ladle shroud according to claim 1, characterised in that: The gas sealing assembly (4) comprises a plurality of air inlet pipes (41) and conducting pipes (42) in one-to-one correspondence, the ends of the plurality of conducting pipes (42) are communicated with the annular sealing groove (43), the plurality of conducting pipes (42) are uniformly distributed on the annular sealing groove (43), and the plurality of air inlet pipes (41) are installed on the outside of the sealing part (2) in one-to-one correspondence with the conducting pipes (42).
3. A ladle shroud according to claim 2, characterised in that: The tangent line of the outlet end of the conducting pipe (42) and the annular sealing groove (43) forms an included angle a.
4. A ladle shroud according to claim 2, characterised in that: The tangent line of the outlet end of the conducting pipe (42) and the annular sealing groove (43) coincides; The tangent line of the outer wall of the conducting pipe (42) and the annular sealing groove (43) coincides, and an arc-shaped air outlet groove (47) is formed in front of the outlet end of the conducting pipe (42).
5. A ladle shroud according to any one of claims 1 to 4, characterised in that: The gas sealing assembly (4) further comprises a ring-shaped pipe (44) with a diameter larger than the sealing part (2), and a guide pipe (46) installed on the ring-shaped pipe (44); The plurality of air inlet pipes (41) are installed on the ring-shaped pipe (44), and the air inlet pipe (41) is fixedly connected with a gas guide pipe (45) away from the conducting pipe (42), and the ends of the plurality of gas guide pipes (45) away from the air inlet pipe (41) are hidden in the ring-shaped pipe (44) and extended out of the ring-shaped pipe (44) through the guide pipe (46) to communicate with the argon injection system.
6. A ladle shroud according to claim 1 wherein: The sealing ring (5) is an aluminum silicate fiber.