Continuous casting submersed nozzle with long service life
By designing the immersed water port as a detachable structure, the steel body can be replaced separately, combined with reinforced pipes and thermal insulation layer, the water port damage caused by high-temperature steel water impact is solved, reducing replacement cost and extending service life.
Patent Information
- Application Number
- CN202422460468.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The existing immersion water ports are easily damaged under the impact of high-temperature molten steel, resulting in a high replacement frequency and increasing the cost of use.
The immersion water port is designed as a detachable structure, and the steel outlet body is separated from the flow steel body. It is connected by connecting components. The steel outlet body can be replaced separately. The flow steel body is equipped with reinforcement pipes and heat insulation layers to enhance structural strength and heat resistance.
It reduces the cost of replacing the water outlet, extends the service life, and reduces frequent replacement caused by damage to the steel outlet.
Smart Images
Figure CN223114175U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of continuous casting of steel, and specifically relates to a continuous casting submerged nozzle with a long service life. Background Art
[0002] A submerged nozzle is a refractory pouring sleeve installed at the bottom of an intermediate ladle and inserted below the molten steel level in a mold in continuous steel casting equipment. The main function of the submerged nozzle is to prevent secondary oxidation of the ladle stream and splashing of molten steel. According to the use environment and steel types, the submerged nozzle is divided into various types of nozzles made of different materials, such as fused silica nozzles, alumina-carbon nozzles, alumina-carbon-zirconia-carbon composite nozzles, and silicon carbide (SiC) nozzles, etc. During the steel pouring process, the high-temperature molten steel is likely to react with the material of the submerged nozzle, resulting in the phenomenon of nodulation on the inner wall of the inner through-hole of the submerged nozzle or enlargement of the hole diameter, leading to interruption of molten steel flow or unstable outflow.
[0003] For example, the patent with the publication number CN218656798U discloses a submerged nozzle, which includes a nozzle body, a slag line, and a lining assembly. A steel outlet hole is provided on the nozzle body. The slag line is arranged on the nozzle body. A communication hole is provided on the slag line, and the communication hole communicates with the steel outlet hole. The lining assembly includes a heat-insulating lining, a first erosion-resistant lining, and a second erosion-resistant lining. The first erosion-resistant lining is laid on the inner wall of the communication hole, and the heat-insulating lining is laid on the side of the first erosion-resistant lining away from the slag line. The second erosion-resistant lining is laid on the inner wall of the steel outlet hole. During the steel pouring process, the molten steel passes through the communication hole and the steel outlet hole. The first erosion-resistant lining and the second erosion-resistant lining prevent the high-temperature molten steel from directly contacting the slag line and the nozzle body when passing through, so that it is not easy to react with the submerged nozzle. The heat-insulating lining reduces heat transfer and avoids damage to the slag line with poor thermal shock resistance caused by high-temperature molten steel, thus prolonging the service life of the submerged nozzle.
[0004] However, the submerged nozzle in the above technology still has the following problems:
[0005] Although the first erosion-resistant lining, the second erosion-resistant lining, and the heat-insulating lining can avoid damage to the slag line with poor thermal shock resistance caused by molten steel, when the temperature or flow rate of the molten steel is relatively high, when passing through the steel outlet, it will cause a large impact force on the steel outlet of the nozzle, resulting in easy damage to the position of the steel outlet of the nozzle, and then increasing the replacement frequency of the submerged nozzle and increasing the use cost. Summary of the Utility Model
[0006] Aiming at the deficiencies of the prior art, the utility model provides a continuous casting submerged nozzle with a long service life. For example, the submerged nozzle is set as a detachable structure, and the steel outlet end of the nozzle is replaced separately, so as to reduce the replacement cost of the nozzle.
[0007] To achieve the above object, the present utility model provides the following technical solution: A continuous casting submerged nozzle with a long service life, including a nozzle body, the nozzle body includes a molten steel body and a steel discharging body, a molten steel hole is penetrated and opened at one end of the molten steel body close to the steel discharging body, steel discharging ports are opened on both sides of the steel discharging body and are communicated, a communication hole is penetrated and opened on one side adjacent to the two steel discharging ports and close to the molten steel body, the communication hole is communicated with the molten steel hole, and a connection assembly is connected between the molten steel body and the steel discharging body.
[0008] Further, an annular groove is opened at one end of the molten steel body far from the steel discharging body, and a reinforcing pipe is connected in the annular groove.
[0009] Further, a heat insulation layer is provided on the inner wall of the annular groove, and the reinforcing pipe is located in the heat insulation layer.
[0010] Further, the connection assembly includes a plurality of long rod bolts, the threaded rods of the plurality of long rod bolts sequentially penetrate through the reinforcing pipe, the heat insulation layer, and the bottom of the molten steel body from one end of the reinforcing pipe far from the steel discharging body, and are threadedly connected to one end of the steel discharging body close to the molten steel body, and the nuts of the plurality of long rod bolts are all abutted against one side of the reinforcing pipe far from the steel discharging body.
[0011] Further, a sealing ring is slidably connected to the inner wall of the annular groove far from the steel discharging body, and the sealing ring abuts against the nuts of the plurality of long rod bolts.
[0012] Compared with the prior art, the present utility model has the following beneficial effects:
[0013] For this continuous casting submerged nozzle with a long service life, by splitting the nozzle body into two parts, namely a molten steel body and a steel discharging body, and using a connection assembly to connect the two parts to form a nozzle for use. When the steel discharging body is cracked or damaged, the steel discharging body can be replaced separately, thereby reducing the cost of nozzle replacement. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic diagram of the overall external connection structure of the present utility model;
[0015] Figure 2 is an exploded schematic diagram of the overall external connection structure of the present utility model;
[0016] Figure 3 is a schematic diagram of the cross-sectional structure and the internal structure explosion of the molten steel body of the present utility model;
[0017] Figure 4 is an exploded schematic diagram of the connection structure between the reinforcing pipe and the long rod bolts of the present utility model.
[0018] In the figure: 1, nozzle body; 2, molten steel body; 3, tapping body; 4, reinforcing pipe; 5, heat insulation layer; 6, long bolt; 7, sealing ring; 201, molten steel hole; 202, annular groove; 301, tapping hole; 302, communication hole. Detailed implementation manners
[0019] 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.
[0020] Please refer to Figure 1 - Figure 4 , a continuous casting submerged nozzle with a long service life, including a nozzle body 1. The nozzle body 1 includes a molten steel body 2 and a tapping body 3. A molten steel hole 201 is penetrated and opened at one end of the molten steel body 2 close to the tapping body 3. Tapping holes 301 communicated with each other are opened on both sides of the tapping body 3. A communication hole 302 is penetrated and opened on one side adjacent to the two tapping holes 301 and close to the molten steel body 2. The communication hole 302 is communicated with the molten steel hole 201. A connecting component is connected between the molten steel body 2 and the tapping body 3.
[0021] As Figure 1 - Figure 4 shown, a continuous casting submerged nozzle with a long service life in the present utility model is similar in structure to the existing continuous casting submerged nozzle with a long service life. For example, an immersion nozzle disclosed in the patent with the publication number CN218656798U. The main improvement point of the present utility model is to reduce the nozzle replacement cost. As Figures 1 to 4 shown, when the continuous casting submerged nozzle with a long service life in the present utility model is in use, the tapping body 3 is installed at the lower end of the molten steel body 2 through the connecting component, so as to form a complete nozzle body 1. Molten steel flows into from the molten steel hole 201 at the top of the molten steel body 2, and then enters the two tapping holes 301 through the communication hole 302 and flows out from the nozzle body 1. Since the molten steel will have a certain impact on the tapping holes 301 when it disperses into the two tapping holes 301 from the communication hole 302, the tapping body 3 is more likely to be damaged compared with the molten steel body 2. The tapping body 3 is disassembled and replaced from the bottom of the molten steel body 2 through the connecting component, so that it is not necessary to replace the entire nozzle body 1, reducing the use and replacement cost of the nozzle.
[0022] As Figure 1 - Figure 4 shown, an annular groove 202 is opened at one end of the molten steel body 2 away from the tapping body 3, and a reinforcing pipe 4 is connected in the annular groove 202. By arranging the reinforcing pipe 4 inside the molten steel body 2, the structural strength of the molten steel body 2 is strengthened, better coping with the stress generated when the molten steel flows in the molten steel hole 201, reducing the damage rate of the molten steel body 2, and improving the service life of the nozzle body 1.
[0023] As Figure 1 - Figure 4 shown, a heat insulation layer 5 is provided on the inner wall of the annular groove 202, and the reinforcing pipe 4 is located inside the heat insulation layer 5. The reinforcing pipe 4 is wrapped inside by the heat insulation layer 5, so as to reduce the high temperature of the molten steel from transferring the high temperature to the inner reinforcing pipe 4 through the molten steel body 2, and avoid the possible damage to the reinforcing pipe 4 caused by the high temperature.
[0024] As Figure 1 - Figure 4 shown, the connecting assembly includes a plurality of long rod bolts 6. The threaded rods of the plurality of long rod bolts 6 sequentially penetrate through the reinforcing pipe 4, the heat insulation layer 5, and the bottom of the molten steel body 2 from the end of the reinforcing pipe 4 away from the molten steel discharging body 3, and are threadedly connected to the end of the molten steel discharging body 3 close to the molten steel body 2. The nuts of the plurality of long rod bolts 6 are all abutted against the side of the reinforcing pipe 4 away from the molten steel discharging body 3. When installing the molten steel discharging body 3 at the bottom of the molten steel body 2, use the long rod bolts 6 to pass through the reinforcing pipe 4 and the bottom of the molten steel body 2, and threadedly fasten them to the end of the molten steel discharging body 3, so as to realize the installation and fixation of the molten steel discharging body 3 at the bottom of the molten steel body 2. At the same time, after each installation is completed, the gap at the connection position between the molten steel discharging body 3 and the molten steel body 2 can be filled to prevent molten steel from entering the connection gap. When filling, a little molten steel can be used for filling to ensure that after the molten steel flows through the nozzle body 1, no impurities will enter the molten steel.
[0025] As Figure 1 - Figure 4 shown, a sealing ring 7 is slidably connected to the inner wall of the annular groove 202 at the end of the annular groove 202 away from the molten steel discharging body 3, and the sealing ring 7 abuts against the nuts of the plurality of long rod bolts 6. After installing the nozzle body 1 with the long rod bolts 6, use the sealing ring 7 to block the opening of the annular groove 202 at the top of the molten steel body 2 to improve the sealing performance of the inner reinforcing pipe 4.
[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention.
Claims
1. A continuous casting submerged nozzle with a long service life, comprising a nozzle body (1), characterized in that: The nozzle body (1) includes a molten steel flow body (2) and a steel tapping body (3). A molten steel hole (201) is penetrated and opened at one end of the molten steel flow body (2) close to the steel tapping body (3). Steel tapping ports (301) that are communicated are opened on both sides of the steel tapping body (3). A communication hole (302) is penetrated and opened on one side adjacent to the two steel tapping ports (301) and close to the molten steel flow body (2). The communication hole (302) is communicated with the molten steel hole (201). A connection assembly is connected between the molten steel flow body (2) and the steel tapping body (3).
2. The submerged entry nozzle with long service life according to claim 1, characterized in that: An annular groove (202) is opened at one end of the molten steel flow body (2) away from the steel tapping body (3). A reinforcing pipe (4) is connected in the annular groove (202).
3. A continuous casting submerged nozzle with a long service life according to claim 2, characterized in that: A heat insulation layer (5) is provided on the inner wall of the annular groove (202). The reinforcing pipe (4) is located in the heat insulation layer (5).
4. A continuous casting submerged nozzle with a long service life according to claim 3, characterized in that: The connection assembly includes a plurality of long rod bolts (6). The threaded rods of the plurality of long rod bolts (6) sequentially penetrate through the reinforcing pipe (4), the heat insulation layer (5), and the bottom of the molten steel flow body (2) from one end of the reinforcing pipe (4) away from the steel tapping body (3), and are threadedly connected to one end of the steel tapping body (3) close to the molten steel flow body (2). The nuts of the plurality of long rod bolts (6) are all abutted against one side of the reinforcing pipe (4) away from the steel tapping body (3).
5. A continuous casting submerged nozzle with a long service life according to claim 4, characterized in that: A sealing ring (7) is slidably connected to the inner wall of one end of the annular groove (202) away from the steel tapping body (3). The sealing ring (7) is abutted against the nuts of the plurality of long rod bolts (6).