Novel nitrogen sealing device of converter blanking system

Abstract

The utility model provides a novel nitrogen sealing device for a converter blanking system, which relates to the technical field of ferrous metallurgical equipment and comprises three mounting holes arranged on the outer wall of a converter blanking pipe, DN50 short pipes are arranged in the three mounting holes, a first flange is arranged on the outer wall of one end of each DN50 short pipe, a second flange is arranged on the outer wall of the other end of each DN50 short pipe, and a third flange is arranged on the outer wall of the other end of each DN50 short pipe. A nitrogen sealing injection pipe is arranged in the DN50 short pipe, one end of the nitrogen sealing injection pipe extends out of the DN50 short pipe, a second flange is arranged on the outer wall of the nitrogen sealing injection pipe, the first flange and the second flange are connected and fixed through fixing bolts and nuts, a spray head is arranged at the end, located in the DN50 short pipe, of the nitrogen sealing injection pipe, and the spray head is flush with the inner surface of the converter discharging pipe; nitrogen blown out by the three groups of nitrogen sealing blowing pipes can completely cover the interior of the converter blanking pipe, so that comprehensive nitrogen sealing is realized, flue gas can be effectively prevented from flowing backwards, the nitrogen consumption can be saved, the energy waste can be reduced, and the service life of the nitrogen sealing device can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgical equipment technology, and in particular to a novel nitrogen sealing device for a converter feeding system. Background Technology

[0002] The charging pipe of the converter charging system is connected to the flue above the converter and is located above the converter opening. During the smelting process, various materials are directly added into the furnace through the charging pipe. The outlet of the charging pipe is connected to the high-temperature flue gas of the converter. During the charging process, a large amount of high-temperature flue gas and flames will rush back into the charging system along the charging pipe.

[0003] To prevent backflow of high-temperature flue gas, existing technologies directly install a straight-through pipe on the feed pipe to inject inert nitrogen gas for sealing and blocking. However, because the nitrogen sealing pipe is a straight-through pipe, the injected nitrogen gas is in a beam shape, which cannot completely cover and block the feed pipe, still posing a risk of ignition in the feed system. Furthermore, dust in the flue gas can easily be dispersed into the work environment through the feed system, failing to meet ultra-low emission requirements and resulting in high nitrogen consumption and costs. Therefore, this invention proposes a novel nitrogen sealing device for a converter feed system to address the shortcomings of existing technologies. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a novel nitrogen sealing device for a converter feeding system. The nitrogen gas blown out by the three sets of nitrogen sealing injection pipes can completely cover the inside of the converter feeding pipe, achieving comprehensive nitrogen sealing. This effectively prevents flue gas backflow, saves nitrogen consumption, reduces energy waste, and extends the service life of the nitrogen sealing device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel nitrogen sealing device for a converter charging system includes mounting holes on the outer wall of the converter charging pipe. Three mounting holes are located on the outer wall of the same cross-section of the converter charging pipe, arranged at equal angles. Each of the three mounting holes contains a DN50 short pipe. A first flange is located on the outer wall of one end of the DN50 short pipe. A nitrogen sealing injection pipe is located inside the DN50 short pipe. One end of the nitrogen sealing injection pipe extends out of the DN50 short pipe and has a second flange on its outer wall. The first flange and the second flange are connected and fixed by fixing bolts and nuts. A nozzle is located at the end of the nitrogen sealing injection pipe inside the DN50 short pipe, and the nozzle is flush with the inner surface of the converter charging pipe.

[0007] A further improvement is that: the first flange is provided with a first fixing hole, and the second flange is provided with a second fixing hole. There are multiple first fixing holes and multiple second fixing holes. The fixing bolts are used to connect and fix the first flange and the second flange in the first fixing hole and the second fixing hole with nuts.

[0008] A further improvement is that: one end of the nitrogen sealing spray pipe located inside the DN50 short pipe is provided with an internal threaded connection hole, and one end of the nozzle is provided with an external thread on its outer wall. The nozzle is detachably connected to the internal threaded connection hole through the external thread.

[0009] A further improvement is that: a positioning strip is provided on the outer wall of the nitrogen sealing spray pipe located inside the DN50 short pipe, and multiple sets of the positioning strip are provided; a positioning groove adapted to the positioning strip is provided on the inner wall of the DN50 short pipe.

[0010] A further improvement is that a connecting plate is provided on the outer wall of the DN50 short pipe away from the first flange, and a connecting bolt is provided on the connecting plate. The connecting plate is connected to a preset hole on the outer wall of the converter feed pipe through the connecting bolt.

[0011] Further improvements include: the positioning strip and the outer wall of the nitrogen-sealing spray pipe are integrally formed; the connecting plate is welded and fixed to the outer wall of the DN50 short pipe; and one end of the DN50 short pipe is welded and fixed to the mounting hole.

[0012] The beneficial effects of this utility model are as follows: This utility model opens three mounting holes at equal angles on the outer wall of the converter feeding pipe, and installs a DN50 short pipe in the mounting holes. Then, one end of the nitrogen sealing injection pipe is inserted into the DN50 short pipe, and a nozzle with its port flush with the inner surface of the converter feeding pipe is set at the end of the nitrogen sealing injection pipe located inside the DN50 short pipe. The nitrogen gas blown out by the three sets of nitrogen sealing injection pipes can completely cover the inside of the converter feeding pipe, achieving complete nitrogen sealing. This can effectively prevent flue gas backflow, save nitrogen consumption, reduce energy waste, and improve the service life of the nitrogen sealing device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the nitrogen sealing device and converter feed pipe installation structure of this utility model;

[0014] Figure 2 This is a structural breakdown diagram of the nitrogen sealing device of this utility model;

[0015] Figure 3 This is a top view of the installation structure of the nitrogen sealing device of this utility model.

[0016] The components are as follows: 1. Converter feed pipe; 2. Mounting hole; 3. DN50 short pipe; 4. First flange; 5. Nitrogen sealing injection pipe; 6. Second flange; 7. Fixing bolt; 8. Nut; 9. Nozzle; 10. First fixing hole; 11. Second fixing hole; 12. Internal threaded connection hole; 13. External thread; 14. Positioning strip; 15. Positioning groove; 16. Connecting plate; 17. Connecting bolt. Detailed Implementation

[0017] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0018] Example 1

[0019] according to Figure 1-3 As shown in the figure, this embodiment proposes a novel nitrogen sealing device for a converter feeding system, including mounting holes 2 on the outer wall of the converter feeding pipe 1. Three mounting holes 2 are provided on the outer wall of the converter feeding pipe 1 at the same cross-section, and the three mounting holes 2 are arranged at equal angles. Each of the three mounting holes 2 is provided with a DN50 short pipe 3. A first flange 4 is provided on the outer wall of one end of the DN50 short pipe 3. A nitrogen sealing injection pipe 5 is provided inside the DN50 short pipe 3. One end of the nitrogen sealing injection pipe 5 extends out of the DN50 short pipe 3 and is provided with a second flange 6 on its outer wall. The first flange 4 and the second flange 6 are connected and fixed by fixing bolts 7 and nuts 8. A nozzle 9 is provided at the end of the nitrogen sealing injection pipe 5 located inside the DN50 short pipe 3. The nozzle 9 is flush with the inner surface of the converter feeding pipe 1.

[0020] When installing and using the new nitrogen sealing device of the converter feeding system of this utility model, first insert one end of the DN50 short pipe 3 into the mounting hole 2, and weld and fix the DN50 short pipe 3 in the mounting hole 2. Then install the nozzle 9 at one end of the nitrogen sealing blowing pipe 5, and insert the nozzle 9 into the DN50 short pipe 3 along with the nitrogen sealing blowing pipe 5. When the first flange 4 and the second flange 6 are close together, fix the first flange 4 and the second flange 6 together by fixing bolts 7 and nuts 8.

[0021] The first flange 4 has a first fixing hole 10, and the second flange 6 has a second fixing hole 11. Multiple fixing holes 10 and 11 are provided. The fixing bolts 7, in conjunction with nuts 8, connect and fix the first flange 4 and the second flange 6 in the first and second fixing holes 10 and 11. This invention extends the service life of the nitrogen sealing process by connecting the nitrogen sealing spray pipe 5 and the DN50 short pipe 3 using the second flange 6 and the first flange 4, reducing contact between the nitrogen sealing spray pipe 5 and the material, and avoiding damage to some nozzles 9 caused by material abrasion of the pipe wall during the feeding process.

[0022] The nitrogen sealing injection pipe 5 has an internally threaded connection hole 12 at one end inside the DN50 short pipe 3, and the nozzle 9 has an external thread 13 on the outer wall of one end. The nozzle 9 is detachably connected to the internally threaded connection hole 12 through the external thread 13. With the above configuration, the nozzle 9 can be disassembled for periodic cleaning or replacement, ensuring the stability of nitrogen injection.

[0023] This invention involves opening three equally angled mounting holes 2 on the outer wall of the converter feed pipe 1, and installing a DN50 short pipe 3 inside the mounting holes 2. Then, one end of the nitrogen sealing spray pipe 5 is inserted into the DN50 short pipe 3, and a nozzle 9 with its port flush with the inner surface of the converter feed pipe 1 is installed at the end of the nitrogen sealing spray pipe 5 located inside the DN50 short pipe 3. The nitrogen gas blown out by the three sets of nitrogen sealing spray pipes 5 can completely cover the inside of the converter feed pipe 1, achieving complete nitrogen sealing. This can effectively prevent flue gas backflow, save nitrogen consumption, reduce energy waste, and improve the service life of the nitrogen sealing device.

[0024] Example 2

[0025] according to Figure 1-3 As shown in the figure, this embodiment proposes a novel nitrogen sealing device for a converter feeding system, including mounting holes 2 on the outer wall of the converter feeding pipe 1. Three mounting holes 2 are provided on the outer wall of the converter feeding pipe 1 at the same cross-section, and the three mounting holes 2 are arranged at equal angles. Each of the three mounting holes 2 is provided with a DN50 short pipe 3. A first flange 4 is provided on the outer wall of one end of the DN50 short pipe 3. A nitrogen sealing injection pipe 5 is provided inside the DN50 short pipe 3. One end of the nitrogen sealing injection pipe 5 extends out of the DN50 short pipe 3 and is provided with a second flange 6 on its outer wall. The first flange 4 and the second flange 6 are connected and fixed by fixing bolts 7 and nuts 8. A nozzle 9 is provided at the end of the nitrogen sealing injection pipe 5 located inside the DN50 short pipe 3. The nozzle 9 is flush with the inner surface of the converter feeding pipe 1.

[0026] A positioning strip 14 is provided on the outer wall of the nitrogen-sealing injection pipe 5 located inside the DN50 short pipe 3. Multiple sets of positioning strips 14 are provided, and a positioning groove 15 adapted to the positioning strip 14 is provided on the inner wall of the DN50 short pipe 3. By setting the positioning strip 14 and the positioning groove 15, the nitrogen-sealing injection pipe 5 can be quickly centered and installed, which can improve the convenience of installation of the nitrogen-sealing injection pipe 5.

[0027] A connecting plate 16 is provided on the outer wall of the DN50 short pipe 3 on the side away from the first flange 4. The connecting plate 16 is provided with connecting bolts 17. The connecting plate 16 is connected to the pre-set hole on the outer wall of the converter feed pipe 1 through the connecting bolts 17. By setting the connecting plate 16 and connecting bolts 17, the DN50 short pipe 3 can be further fixed after being welded and fixed to the mounting hole 2, thereby improving the overall installation stability.

[0028] The positioning strip 14 and the outer wall of the nitrogen sealing spray pipe 5 are integrally formed. The connecting plate 16 is welded and fixed to the outer wall of the DN50 short pipe 3. One end of the DN50 short pipe 3 is welded and fixed to the mounting hole 2.

[0029] This invention involves opening three equally angled mounting holes 2 on the outer wall of the converter feed pipe 1, and installing a DN50 short pipe 3 inside the mounting holes 2. Then, one end of the nitrogen sealing spray pipe 5 is inserted into the DN50 short pipe 3, and a nozzle 9 with its port flush with the inner surface of the converter feed pipe 1 is installed at the end of the nitrogen sealing spray pipe 5 located inside the DN50 short pipe 3. The nitrogen gas blown out by the three sets of nitrogen sealing spray pipes 5 can completely cover the inside of the converter feed pipe 1, achieving complete nitrogen sealing. This can effectively prevent flue gas backflow, save nitrogen consumption, reduce energy waste, and improve the service life of the nitrogen sealing device.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel nitrogen sealing device for a converter charging system, comprising mounting holes (2) formed on the outer wall of the converter charging pipe (1), characterized in that: The mounting holes (2) are provided on the outer wall of the same cross section of the converter feed pipe (1). The three mounting holes (2) are set at equal angles, and each of the three mounting holes (2) is provided with a DN50 short pipe (3). A first flange (4) is provided on the outer wall of one end of the DN50 short pipe (3). A nitrogen sealing injection pipe (5) is provided inside the DN50 short pipe (3). One end of the nitrogen sealing injection pipe (5) extends out of the DN50 short pipe (3) and a second flange (6) is provided on its outer wall. The first flange (4) and the second flange (6) are connected and fixed by fixing bolts (7) and nuts (8). A nozzle (9) is provided at one end of the nitrogen sealing injection pipe (5) inside the DN50 short pipe (3). The nozzle (9) is flush with the inner surface of the converter feed pipe (1).

2. The novel nitrogen sealing device for a converter feeding system according to claim 1, characterized in that: The first flange (4) is provided with a first fixing hole (10), and the second flange (6) is provided with a second fixing hole (11). There are multiple first fixing holes (10) and second fixing holes (11). The fixing bolt (7) is in the first fixing hole (10) and the second fixing hole (11) and is connected and fixed by a nut (8) to fix the first flange (4) and the second flange (6).

3. A novel nitrogen sealing device for a converter feeding system according to claim 1, characterized in that: The nitrogen sealing spray pipe (5) is provided with an internal threaded connection hole (12) at one end inside the DN50 short pipe (3), and the nozzle (9) is provided with an external thread (13) on the outer wall of one end. The nozzle (9) is detachably connected to the internal threaded connection hole (12) through the external thread (13).

4. A novel nitrogen sealing device for a converter feeding system according to claim 1, characterized in that: A positioning strip (14) is provided on the outer wall of the nitrogen sealing spray pipe (5) located inside the DN50 short pipe (3). Multiple sets of positioning strips (14) are provided. A positioning groove (15) adapted to the positioning strip (14) is provided on the inner wall of the DN50 short pipe (3).

5. A novel nitrogen sealing device for a converter feeding system according to claim 4, characterized in that: A connecting plate (16) is provided on the outer wall of the DN50 short pipe (3) away from the first flange (4). The connecting plate (16) is provided with connecting bolts (17). The connecting plate (16) is connected to the preset hole on the outer wall of the converter feed pipe (1) through the connecting bolts (17).

6. A novel nitrogen sealing device for a converter feeding system according to claim 5, characterized in that: The positioning strip (14) and the outer wall of the nitrogen sealing spray pipe (5) are integrally formed. The connecting plate (16) is welded and fixed to the outer wall of the DN50 short pipe (3). One end of the DN50 short pipe (3) is welded and fixed to the mounting hole (2).

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