Blast furnace coal injection gun with long service life

By designing a 170° obtuse angle bend and a reinforced sleeve structure, the problem of short service life of the pulverized coal injection gun was solved, and the structural stability and service life of the pulverized coal injection gun were improved, ensuring the safety of blast furnace production.

CN223921436UActive Publication Date: 2026-02-17YANGCHUN NEW STEEL CO LTD
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Patent Information

Application Number
CN202520538568.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-25
Publication Date
2026-02-17
Estimated Expiration
2035-03-25

AI Technical Summary

Technical Problem

The existing blast furnace pulverized coal injection lances have a short service life, the lance head is prone to deformation and the inner wall of the tube is prone to wear, resulting in frequent equipment replacement and affecting the safety of blast furnace production.

Method used

The obtuse angle bends between the first and second barrels and between the second barrel and the head tube are designed to be 170°, with reinforcements at the obtuse angle bends and a protective sleeve at the head tube outlet to enhance structural stability.

Benefits of technology

This improves the service life of the pulverized coal injection gun, avoids gun head deformation and wear on the inner wall of the tube, and ensures the stability and safety of blast furnace production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a blast furnace coal injection gun with long service life, which relates to the technical field of blast furnace coal injection guns and comprises a first gun barrel, a second gun barrel and a gun head tube, the first gun barrel, the second gun barrel and the gun head tube are integrally formed to form a blast furnace coal injection gun body, and a first obtuse angle bend is formed between the first gun barrel and the second gun barrel. A first obtuse angle bend is formed between the first gun barrel and the gun head pipe, a second obtuse angle bend is formed between the second gun barrel and the gun head pipe, and the first obtuse angle bend and the second obtuse angle bend are located on the same horizontal plane and are both 170 degrees; according to the utility model, the first gun barrel, the second gun barrel and the gun head pipe are sequentially connected, and the first obtuse angle bend formed between the first gun barrel and the second gun barrel and the second obtuse angle bend formed between the second gun barrel and the gun head pipe are both set to be 170 degrees, so that the bending degree of the coal gun barrel is improved, and the sharp bend phenomenon caused by large bending degree is avoided; and therefore, the service life of the coal gun can be prolonged.
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Description

TECHNICAL FIELD

[0001] The utility model relates to blast furnace coal injection gun technical field especially relates to a blast furnace coal injection gun with long service life. BACKGROUND

[0002] The coal injection gun is one of important equipment of blast furnace coal injection system, and the pulverized coal is injected into the furnace through the blast furnace tuyere position, and the purpose of partially replacing the coke to reduce the ore and burning heat is realized. Since the gun head of the coal injection gun is close to the outer surface of the front end of the tuyere, needs to bear the high temperature (more than 1200 DEG C) airflow scouring, and simultaneously bears the wear of the coke in the revolving zone, the service life of the coal injection gun is short, and the service period can only be controlled at 2 months. And the gun head of the coal injection gun pipe is 150 degrees obtuse angle bending, and the 150 degrees obtuse angle bending is easy to change in long-term high temperature airflow scouring, and the bending part forms an acute bending, and the wear resistance of the pipe is increased, which leads to the perforation of the tuyere small sleeve important equipment. Therefore, the utility model provides a blast furnace coal injection gun with long service life to solve the defects in the prior art. SUMMARY

[0003] In view of the above problems, the utility model aims at providing a blast furnace coal injection gun with long service life, which is connected and arranged in sequence by a first gun pipe, a second gun pipe and a gun head pipe, and the first obtuse angle bend formed between the first gun pipe and the second gun pipe and the second obtuse angle bend formed between the second gun pipe and the gun head pipe are both set to 170 degrees, which improves the manufacturing of the bending degree of the coal injection gun pipe, avoids the phenomenon of acute bending caused by large bending degree, and the problems of gun head deformation or easy wear of the inner wall of the pipe caused by coal powder, so that the service life of the coal injection gun can be improved, and the safety production of the blast furnace can be ensured.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A blast furnace coal injection gun with long service life, comprising a first gun pipe, a second gun pipe and a gun head pipe, one end of the first gun pipe is provided with the second gun pipe, one end of the second gun pipe is provided with the gun head pipe, the inside of the outlet end of the gun head pipe is trumpet-shaped, the first gun pipe, the second gun pipe and the gun head pipe are integrally formed to constitute a blast furnace coal injection gun body, a first obtuse angle bend is formed between the first gun pipe and the second gun pipe, a second obtuse angle bend is formed between the second gun pipe and the gun head pipe, the first obtuse angle bend and the second obtuse angle bend are located on the same horizontal plane, and the first obtuse angle bend and the second obtuse angle bend are both 170 degrees.

[0006] A first reinforcing member is arranged on the outer wall of the blast furnace coal injection gun body at the first obtuse angle bend, a second reinforcing member is arranged on the outer wall of the blast furnace coal injection gun body at the second obtuse angle bend, a sheath is arranged outside the outlet end of the gun head pipe, and the sheath is connected with the second reinforcing member.

[0007] Further improvement lies in that the first reinforcing member comprises a first upper fixed cover plate and a first lower fixed cover plate, the first upper fixed cover plate and the first lower fixed cover plate are arranged above and below the first obtuse angle bend respectively, and the first upper fixed cover plate and the first lower fixed cover plate are connected through a first fixing bolt.

[0008] Further improvement lies in that the second reinforcing member comprises a second upper fixed cover plate and a second lower fixed cover plate, the second upper fixed cover plate and the second lower fixed cover plate are arranged above and below the second obtuse angle bend respectively, and the second upper fixed cover plate and the second lower fixed cover plate are connected through a second fixing bolt.

[0009] Further improvement lies in that the first upper fixed cover plate, the first lower fixed cover plate, the second upper fixed cover plate and the second lower fixed cover plate are all provided with a first heat dissipation groove on the inner wall, and the first heat dissipation groove is provided with a plurality of groups.

[0010] Further improvement lies in that the sheath is provided with a plug rod at one end, the second upper fixed cover plate and the second lower fixed cover plate are both provided with a plug hole at one end, the plug rod and the plug hole are adaptively installed, the second upper fixed cover plate and the second lower fixed cover plate are both provided with a connecting bolt on the outer wall at one end, the plug rod is provided with a butt joint hole, and the connecting bolt is connected with the butt joint hole at the lower end.

[0011] Further improvement lies in that the sheath is provided with a second heat dissipation groove on the inner wall, and the second heat dissipation groove is provided with a plurality of groups.

[0012] The utility model discloses the beneficial effect that: the utility model discloses through first gun tube, second gun tube and gun head pipe are connected in proper order setting, and the first obtuse angle bend formed between first gun tube and second gun tube and the second obtuse angle bend formed between second gun tube and gun head pipe are all set as 170 DEG, improve the production of the degree of curvature of coal gun pipe, avoid the phenomenon of sharp bend formed by the big degree of curvature, and then the problem of gun head modification or the inner wall of pipe is easy to be abraded by coal powder, can realize the service life of coal gun is improved, and the safety production of blast furnace is ensured.

[0013] The utility model discloses through setting first reinforcing member at first obtuse angle bend, setting second reinforcing member at second obtuse angle bend and setting sheath on the outside of gun head pipe export end and connecting with second reinforcing member, first reinforcing member, second reinforcing member and sheath can protect first obtuse angle bend, second obtuse angle bend and gun head pipe export end heat deformation respectively, improve the structural stability of coal gun, and then improve the service life. ACCURATE DRAWINGS

[0014] Figure 1 It is the three-dimensional schematic view of the utility model structure;

[0015] Figure 2 It is the three-dimensional schematic view of the blast furnace coal injection gun body structure of the utility model;

[0016] Figure 3It is the first obtuse angle bend and second obtuse angle bend schematic view of the utility model;

[0017] Figure 4 It is the first reinforcing member structure three-dimensional schematic view of the utility model;

[0018] Figure 5 It is the second reinforcing member structure three-dimensional schematic view of the utility model;

[0019] Figure 6 It is the sheath and second reinforcing member installation structure split schematic view of the utility model;

[0020] Figure 7 It is the gun head pipe structure main view section view schematic view of the utility model.

[0021] Wherein: 1, first barrel; 2, second barrel; 3, gun head pipe; 4, first reinforcing member; 401, first upper fixed cover plate; 402, first lower fixed cover plate; 403, first fixed bolt; 5, second reinforcing member; 501, second upper fixed cover plate; 502, second lower fixed cover plate; 503, second fixed bolt; 6, sheath; 7, first heat dissipation groove; 8, insertion rod; 9, insertion hole; 10, connecting bolt; 11, butt joint hole; 12, second heat dissipation groove. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the utility model, the utility model will be further described in the following combined with examples, and the present embodiment is only used to explain the utility model, and does not constitute the limitation to the protection scope of the utility model.

[0023] According to Figures 1-7 As shown in the figure, the present embodiment proposes a high service life blast furnace coal injection gun, including first barrel 1, second barrel 2 and gun head pipe 3, the first barrel 1 one end is equipped with second barrel 2, the second barrel 2 one end is equipped with gun head pipe 3, the gun head pipe 3 export end inside is like a horn, the first barrel 1, second barrel 2 and gun head pipe 3 three integrally formed constitute blast furnace coal injection gun body, the first barrel 1 and second barrel 2 between form first obtuse angle bend, the second barrel 2 and gun head pipe 3 between form second obtuse angle bend, the first obtuse angle bend and second obtuse angle bend are located on the same horizontal plane, and the first obtuse angle bend and second obtuse angle bend are all 170 ° angle;The blast furnace coal injection gun body outer wall on the first obtuse angle bend is equipped with first reinforcing member 4, the blast furnace coal injection gun body outer wall on the second obtuse angle bend is equipped with second reinforcing member 5, the gun head pipe 3 export end outside is equipped with sheath 6, the sheath 6 and second reinforcing member 5 are connected.

[0024] The linear length of the blast furnace coal injection gun body is preferably 1750mm (generally 1950mm, the coal injection gun pipe inserted into the tuyere is shortened by 200mm away from the outer surface of the tuyere front end, which can reduce high temperature airflow scouring and wear), the second obtuse angle bend is arranged at the gun head 200mm, and the first obtuse angle bend is arranged at 850mm.

[0025] The first reinforcing part 4 comprises a first upper fixed cover plate 401 and a first lower fixed cover plate 402, the first upper fixed cover plate 401 and the first lower fixed cover plate 402 are arranged above and below the first obtuse angle bend respectively, and the first upper fixed cover plate 401 and the first lower fixed cover plate 402 are connected by a first fixing bolt 403. When the first reinforcing part 4 is installed, the first upper fixed cover plate 401 and the first lower fixed cover plate 402 are arranged above and below the first obtuse angle bend respectively, and then the two are connected by the first fixing bolt 403, and the shape of the first upper fixed cover plate 401 and the first lower fixed cover plate 402 of the utility model is matched with the shape of the first obtuse angle.

[0026] The second reinforcing part 5 comprises a second upper fixed cover plate 501 and a second lower fixed cover plate 502, the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are arranged above and below the second obtuse angle bend respectively, and the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are connected by a second fixing bolt 503. When the second reinforcing part 5 is installed, the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are arranged above and below the second obtuse angle bend respectively, and then the two are connected by the second fixing bolt 503, and the shape of the second upper fixed cover plate 501 and the second lower fixed cover plate 502 of the utility model is matched with the shape of the second obtuse angle.

[0027] The first upper fixed cover plate 401, the first lower fixed cover plate 402, the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are all provided with a first heat dissipation groove 7 on the inner side wall, and the first heat dissipation groove 7 is provided with multiple groups. The first heat dissipation groove 7 can facilitate rapid heat dissipation between the first reinforcing part 4, the second reinforcing part 5 and the blast furnace coal injection gun body, and can avoid high temperature continuous radiation of the blast furnace coal injection gun body.

[0028] The sheath 6 is provided with a plug rod 8 at one end, the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are provided with a plug hole 9 at one end, the plug rod 8 is matched and installed with the plug hole 9, the second upper fixed cover plate 501 and the second lower fixed cover plate 502 are provided with a connecting bolt 10 on the outer wall at one end, the plug rod 8 is provided with a butt joint hole 11, and the connecting bolt 10 is connected with the butt joint hole 11 at the lower end. The setting of the sheath 6 can maintain the structural stability of the outlet end of the gun head pipe 3, the plug rod 8 is matched and installed with the plug hole 9 during installation, and then the plug rod 8 is fixed on the second upper fixed cover plate 501 and the second lower fixed cover plate 502 by using the connecting bolt 10. The inner side wall of the sheath 6 is provided with a second heat dissipation groove 12, and the second heat dissipation groove 12 is provided with a plurality of groups. The second heat dissipation groove 12 is used for quickly discharging heat between the sheath 6 and the gun head pipe 3.

[0029] The utility model discloses a first gun pipe 1, second gun pipe 2 and gun head pipe 3 are sequentially connected to set up, and the first obtuse angle bend that is formed between first gun pipe 1 and second gun pipe 2 and the second obtuse angle bend that is formed between second gun pipe 2 and gun head pipe 3 are all set to 170 DEG, improve the manufacture of the bending degree of coal gun pipe, avoid the phenomenon of sharp bend formed by the big bending degree, and then the problem of gun head modification or the inner wall of pipe being easily abraded by coal powder can be realized to improve the service life of coal gun, ensure the safe production of blast furnace, the utility model discloses a first reinforcing part 4 is set up at the first obtuse angle bend, a second reinforcing part 5 is set up at the second obtuse angle bend and a sheath 6 is set up on the outside of the outlet end of gun head pipe 3 and is connected with the second reinforcing part 5, and the first reinforcing part 4, the second reinforcing part 5 and the sheath 6 can protect the first obtuse angle bend, the second obtuse angle bend and the outlet end of gun head pipe 3 from being deformed by heat respectively, improve the structural stability of coal gun, and then improve the service life.

[0030] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A long service life blast furnace coal injection lance characterized by: The blast furnace coal injection gun body is formed by the first barrel (1), the second barrel (2) and the barrel head (3), the first barrel (1) and the second barrel (2) form a first obtuse angle bend, the second barrel (2) and the barrel head (3) form a second obtuse angle bend, the first obtuse angle bend and the second obtuse angle bend are located on the same horizontal plane, and the first obtuse angle bend and the second obtuse angle bend are both 170° angle. The first reinforcing part (4) is arranged on the outer wall of the blast furnace coal injection gun body at the first obtuse angle bend, the second reinforcing part (5) is arranged on the outer wall of the blast furnace coal injection gun body at the second obtuse angle bend, and the sheath (6) is arranged outside the outlet end of the barrel head (3).

2. A long service life coal injection lance for a blast furnace according to claim 1, characterized in that: The first reinforcing part (4) comprises a first upper fixed cover plate (401) and a first lower fixed cover plate (402), the first upper fixed cover plate (401) and the first lower fixed cover plate (402) are arranged above and below the first obtuse angle bend respectively, and the first upper fixed cover plate (401) and the first lower fixed cover plate (402) are connected by the first fixed bolt (403).

3. A long service life coal injection lance for a blast furnace according to claim 2, characterized in that: The second reinforcing part (5) comprises a second upper fixed cover plate (501) and a second lower fixed cover plate (502), the second upper fixed cover plate (501) and the second lower fixed cover plate (502) are arranged above and below the second obtuse angle bend respectively, and the second upper fixed cover plate (501) and the second lower fixed cover plate (502) are connected by the second fixed bolt (503).

4. A long service life coal injection lance for a blast furnace according to claim 3, characterized in that: The first upper fixed cover plate (401), the first lower fixed cover plate (402), the second upper fixed cover plate (501) and the second lower fixed cover plate (502) are all provided with the first heat dissipation groove (7) on the inner side wall, and the first heat dissipation groove (7) is provided with multiple groups.

5. A long service life coal injection lance for a blast furnace according to claim 3, characterized in that: One end of the sheath (6) is provided with the insertion rod (8), one end of the second upper fixed cover plate (501) and the second lower fixed cover plate (502) is provided with the insertion hole (9), the insertion rod (8) and the insertion hole (9) are adaptively installed, the outer wall of one end of the second upper fixed cover plate (501) and the second lower fixed cover plate (502) is provided with the connecting bolt (10), the insertion rod (8) is provided with the butt joint hole (11), and the lower end of the connecting bolt (10) is connected with the butt joint hole (11).

6. A long service life coal injection lance for a blast furnace according to claim 1, characterized in that: The inner side wall of the sheath (6) is provided with the second heat dissipation groove (12), and the second heat dissipation groove (12) is provided with multiple groups.