Coal injection device for ironmaking plant

Abstract

The utility model relates to the technical field of steelmaking coal injection devices, and discloses a coal injection device for an ironmaking plant, which comprises a conveying pipeline, a steelmaking blast furnace, a control valve and a connecting pipe, a movable pipe is slidably mounted on the connecting pipe, and a spray head is movably mounted at the other end of the movable pipe; a connecting ring is slidably mounted on the connecting pipe, a mounting ring is rotatably mounted on the connecting ring, and two connecting rods are fixedly mounted on the mounting ring; a rotating ring is rotationally installed at the end, away from the connecting pipe, of the moving pipe, two limiting blocks are fixedly installed on the rotating ring, and the rotating ring is fixedly connected with the connecting rod. A mounting frame is fixedly mounted on the connecting pipe, a driving motor is arranged on the mounting frame, a threaded rod is fixedly mounted at the output end of the shaft part of the driving motor, a nut pair is mounted on the threaded rod through threads, and the nut pair is fixedly connected with the connecting ring. The nozzle can be automatically separated from the steel-making blast furnace, so that an operator can replace the nozzle conveniently and quickly without approaching the steel-making blast furnace when replacing the nozzle.

Description

Technical Field

[0001] The utility model relates to the technical field of coal injection devices for steelmaking, in particular to a coal injection device for an ironmaking plant. Background Art

[0002] Blast furnace coal injection technology is a technology that uses coal powder to replace part of the coke as a reducing agent in the blast furnace smelting process. Blast furnace coal injection technology is a reasonable choice for technological progress. After organically combining high air temperature, oxygen-enriched blast and coal powder injection, it not only benefits both coke saving and increased production, but this combination has also become an indispensable means of adjusting the lower part of the blast furnace.

[0003] Existing iron-making blast furnaces generally use coal injection guns to spray coal powder to provide combustion media for the blast furnace. Each blast furnace will have multiple coal injection guns set up along the circumference. Since continuous coal injection at the front end of the coal injection gun will cause wear, it will be replaced every 20 to 30 days depending on usage.

[0004] The existing patent document with publication number CN220224206U discloses a coal injection gun device, including a coal injection gun barrel and a coal injection gun head. The coal injection gun barrel is connected to a ball valve, a plug valve, a coal discharge valve and a check valve. The outlet of the check valve is connected to an ejection elbow. The coal injection gun head is connected to the outlet of the ejection elbow and disperses the coal before ejecting.

[0005] However, the above device has the following problems when used:

[0006] However, since the nozzle of the coal injection gun needs to be replaced frequently, the existing technology requires the nozzle of the coal injection gun to be removed from the blast furnace before it can be replaced. This operation needs to be done manually, the operating environment is relatively harsh, the operation is cumbersome and there are certain safety hazards.

[0007] Therefore, we propose a coal injection device for ironmaking plants to solve the above problems. Utility Model Content

[0008] The utility model aims to solve the problems existing in the prior art, and proposes a coal injection device for an ironmaking plant, which can automatically separate the nozzle from the steelmaking blast furnace, so that the operator does not need to approach the steelmaking blast furnace when replacing the nozzle, and can replace it conveniently and quickly.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A coal injection device for an ironmaking plant comprises a conveying pipeline, a steelmaking blast furnace, a control valve and a connecting pipe, a moving pipe is slidably mounted on the connecting pipe, and a nozzle is movably mounted on the other end of the moving pipe;

[0011] A connecting ring is slidably mounted on the connecting pipe, a mounting ring is rotatably mounted on the connecting ring, and two connecting rods are fixedly mounted on the mounting ring;

[0012] A rotating ring is rotatably mounted on one end of the moving tube away from the connecting tube, two limit blocks are fixedly mounted on the rotating ring, and the rotating ring is fixedly connected to the connecting rod;

[0013] A mounting frame is fixedly mounted on the connecting pipe, a driving motor is arranged on the mounting frame, a threaded rod is fixedly mounted on the shaft output end of the driving motor, a nut pair is threadedly mounted on the threaded rod, and the nut pair is fixedly connected to the connecting ring.

[0014] Preferably, two mounting rods are fixedly mounted on one end of the connecting pipe close to the control valve, and fixed cleaning rings are fixedly mounted on the mounting rods, and the fixed cleaning rings are in contact with the inner wall of the connecting pipe.

[0015] Preferably, two sliding blocks are fixedly mounted on the mounting rod, and a sliding groove adapted to the sliding blocks is provided on the connecting pipe.

[0016] Preferably, a movable cleaning ring is fixedly installed at one end of the movable tube close to the connecting tube, the movable cleaning ring is in contact with the inner wall of the connecting tube, and a sealing rubber ring is inlaid and installed on the movable tube.

[0017] Preferably, insertion holes for the nozzle at the front end of the movable tube to be placed are evenly and equidistantly provided on the steelmaking blast furnace.

[0018] Preferably, a limit groove is provided on the edge of each insertion hole of the steel-making blast furnace, and the limit groove consists of two parts: a groove for the limit block to be placed in and a groove for the limit block to rotate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] (1) The utility model is provided with a connecting pipe, a movable pipe, a nozzle, a threaded rod, a driving motor, a connecting ring, a mounting ring, a connecting rod, a rotating ring and a nut pair. When the driving motor is started, the rotation of the threaded rod drives the nut pair to move, and then the connecting ring drives the rotating ring to move through the connecting rod, and the movable pipe moves with the rotating ring, and then the movable pipe gradually retracts into the interior of the connecting pipe, thereby realizing the movement of the nozzle, so that the nozzle can be moved out of the interior of the steelmaking blast furnace, thereby facilitating the replacement activity.

[0021] (2) The utility model is provided with a connecting tube, a movable tube, a mounting rod, a fixed cleaning ring and a movable cleaning ring. When the movable tube moves, the fixed cleaning ring and the inner wall of the movable tube move relative to each other, and the movable cleaning ring and the inner wall of the connecting tube are also displaced relative to each other. Then, the movable tube and the connecting tube can be cleaned synchronously by the fixed cleaning ring and the movable cleaning ring respectively, thereby eliminating the need for subsequent manual cleaning, saving time and achieving high efficiency.

[0022] (3) The utility model is provided with a rotating ring, a limit block, an insertion hole and a limit slot. When the limit block is misaligned with the insertion slot, the limit block cannot move, thereby ensuring the stability of the nozzle when spraying coal. When the nozzle needs to be moved, it is only necessary to rotate the limit block so that the limit block is aligned with the insertion slot, and the limit block can be moved, and the nozzle can be taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a coal injection device for an ironmaking plant proposed by the utility model;

[0024] Figure 2 This is a front view schematic diagram of a coal injection device for an ironmaking plant proposed by the utility model;

[0025] Figure 3 This is a side schematic diagram of a coal injection device for an ironmaking plant proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the connection pipe and the movable pipe connection of a coal injection device for an ironmaking plant proposed by the utility model;

[0027] Figure 5 This is a schematic cross-sectional view of the connection between the connecting pipe and the moving pipe of a coal injection device for an ironmaking plant proposed by the utility model;

[0028] Figure 6 This is a schematic diagram of a steelmaking blast furnace with a coal injection device for an ironmaking plant proposed by the utility model;

[0029] Figure 7 The utility model is a schematic diagram of an insertion hole and a limiting groove of a coal injection device for an ironmaking plant.

[0030] In the figure: 1. conveying pipeline; 2. control valve; 3. connecting pipe; 4. moving pipe; 5. nozzle; 6. mounting frame; 7. threaded rod; 8. driving motor; 9. connecting ring; 10. mounting ring; 11. connecting rod; 12. rotating ring; 13. limiting block; 14. nut pair; 15. mounting rod; 16. fixed cleaning ring; 17. slider; 18. slide groove; 19. sealing rubber ring; 20. moving cleaning ring; 21. steelmaking blast furnace; 22. insertion hole; 23. limiting groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] See also Figures 1 to 7A coal injection device for an ironmaking plant comprises a conveying pipeline 1, a steelmaking blast furnace 21, a control valve 2 and a connecting pipe 3, a moving pipe 4 is slidably mounted on the connecting pipe 3, a nozzle 5 is movably mounted on the other end of the moving pipe 4, and the nozzle 5 is used to perform coal injection;

[0033] The delivery pipeline 1 is connected with the connecting pipe 3, and a control valve 2 is arranged between the two. The control valve 2 is used to control the coal injection activity.

[0034] By moving the movable pipe 4 inside the connecting pipe 3 , the movable pipe 4 and the nozzle 5 thereon can be moved synchronously, thereby moving the nozzle 5 out of the steelmaking blast furnace 21 , thereby facilitating the replacement of the nozzle 5 .

[0035] A connecting ring 9 is slidably mounted on the connecting pipe 3, a mounting ring 10 is rotatably mounted on the connecting ring 9, the mounting ring 10 is rotatably mounted on the connecting pipe 3, and two connecting rods 11 are fixedly mounted on the mounting ring 10;

[0036] A rotating ring 12 is rotatably mounted on one end of the moving tube 4 away from the connecting tube 3, two limit blocks 13 are fixedly mounted on the rotating ring 12, and the rotating ring 12 is fixedly connected to the connecting rod 11;

[0037] When the mounting ring 10 is rotated, due to the driving effect of the connecting rod 11, the rotating ring 12 will rotate synchronously, and then the limit block 13 will rotate synchronously, so as to ensure the stability of the spray head 5 during the operation.

[0038] A mounting frame 6 is fixedly mounted on the connecting pipe 3 , a driving motor 8 is arranged on the mounting frame 6 , a threaded rod 7 is fixedly mounted on the shaft output end of the driving motor 8 , a nut pair 14 is threadedly mounted on the threaded rod 7 , and the nut pair 14 is fixedly connected to the connecting ring 9 .

[0039] When the driving motor 8 is started, the threaded rod 7 will rotate, and the rotation of the threaded rod 7 will cause the nut pair 14 to move. The movement of the nut pair 14 will drive the connecting ring 9 to move. The movement of the connecting ring 9 will drive the rotating ring 12 to move through the connecting rod 11. The rotating ring 12 can only rotate on the moving tube 4 and cannot move relatively. Therefore, the moving tube 4 will move with the rotating ring 12, and then the moving tube 4 will gradually retract into the connecting tube 3, thereby realizing the movement of the nozzle 5.

[0040] Two mounting rods 15 are fixedly mounted on one end of the connecting pipe 3 close to the control valve 2 , and a fixed cleaning ring 16 is fixedly mounted on the mounting rods 15 . The fixed cleaning ring 16 is in contact with the inner wall of the connecting pipe 3 .

[0041] When the mobile pipe 4 moves, the fixed cleaning ring 16 moves relative to the inner wall of the mobile pipe 4, and the fixed cleaning ring 16 can clean the inner wall of the mobile pipe 4, thereby sweeping off the lump coal adhering to the inner wall of the mobile pipe 4 in the use link, thereby ensuring the transportation stability of the connecting pipe 3.

[0042] Two sliding blocks 17 are fixedly mounted on the mounting rod 15 , and a sliding groove 18 adapted to the sliding blocks 17 is provided on the connecting pipe 3 .

[0043] When the moving pipe 4 moves, the slider 17 moves on the slide groove 18, so that the connecting pipe 3 can only move but not rotate.

[0044] A movable cleaning ring 20 is fixedly installed at one end of the movable tube 4 close to the connecting tube 3 . The movable cleaning ring 20 fits the inner wall of the connecting tube 3 , and a sealing rubber ring 19 is inlaid and installed on the movable tube 4 .

[0045] The presence of the sealing rubber ring 19 can ensure the airtightness of the inside of the moving pipe 4 and the connecting pipe 3, and ensure the normal transportation of the coal powder.

[0046] When the movable tube 4 moves, the movable cleaning ring 20 will gradually move on the inner wall of the connecting tube 3 , and then the movable cleaning ring 20 and the inner wall of the connecting tube 3 will be relatively displaced, and then the movable cleaning ring 20 can clean the inner wall of the connecting tube 3 .

[0047] The steel-making blast furnace 21 is provided with insertion holes 22 at even intervals for the nozzles 5 at the front end of the moving pipe 4 to be inserted.

[0048] By placing the nozzle 5 into the insertion hole 22 , the pulverized coal can be transported into the steel-making blast furnace 21 , thereby ensuring the normal operation of the steel-making blast furnace 21 .

[0049] The steelmaking blast furnace 21 is provided with a limiting groove 23 at the edge of each insertion hole 22. The limiting groove 23 is composed of two parts: a groove for the limiting block 13 to be placed in and a groove for the limiting block 13 to rotate.

[0050] First, align the limit block 13 with the groove in the limit groove 23 where the limit block 13 can be placed, then make the limit block 13 enter the groove in the limit groove 23 where the limit block 13 can rotate, and then rotate the limit block 13 to make the limit block 13 and the groove in the limit groove 23 where the limit block 13 can be placed be offset, so that the limit block 13 cannot move, so that the nozzle 5 is stably in a fixed state, ensuring the stability during coal injection.

[0051] The working process of the utility model: firstly, the installation operation of the coal injection gun is performed, the nozzle 5 is installed on the movable tube 4, and then the movable tube 4 is moved, and the limit block 13 first enters the insertion groove, and then when the installation ring 10 is rotated, due to the driving effect of the connecting rod 11, the rotating ring 12 will rotate synchronously, and then the limit block 13 will rotate synchronously. At this time, the limit block 13 is in the rotating groove, and the limit block 13 is staggered with the insertion groove. At this time, the limit block 13 cannot move, thereby ensuring the stability of the nozzle 5 when injecting coal.

[0052] When the nozzle 5 needs to be replaced, the limit block 13 is aligned with the insertion slot. At this time, the limit block 13 can be moved, and the driving motor 8 is started. The rotation of the threaded rod 7 causes the nut pair 14 to move. The movement of the nut pair 14 drives the connecting ring 9 to move. The movement of the connecting ring 9 drives the rotating ring 12 to move through the connecting rod 11. The moving tube 4 will move with the rotating ring 12, and then the moving tube 4 will gradually retract into the connecting tube 3, thereby realizing the movement of the nozzle 5 and facilitating the replacement activity.

[0053] When the moving tube 4 moves, the fixed cleaning ring 16 moves relative to the inner wall of the moving tube 4, and the fixed cleaning ring 16 can clean the inner wall of the moving tube 4. At the same time, the moving cleaning ring 20 will gradually move on the inner wall of the connecting tube 3, and then the moving cleaning ring 20 and the inner wall of the connecting tube 3 will move relative to each other, and then the moving cleaning ring 20 can clean the inner wall of the connecting tube 3. The moving tube 4 and the connecting tube 3 can be cleaned synchronously, eliminating the subsequent manual cleaning process, saving time, and having high efficiency.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal injection device for an ironmaking plant, comprising a conveying pipeline (1), a steelmaking blast furnace (21), a control valve (2) and a connecting pipe (3), characterized in that: A movable tube (4) is slidably mounted on the connecting tube (3), and a nozzle (5) is movably mounted on the other end of the movable tube (4); A connecting ring (9) is slidably mounted on the connecting pipe (3), a mounting ring (10) is rotatably mounted on the connecting ring (9), and two connecting rods (11) are fixedly mounted on the mounting ring (10); A rotating ring (12) is rotatably mounted on one end of the movable tube (4) away from the connecting tube (3), two limit blocks (13) are fixedly mounted on the rotating ring (12), and the rotating ring (12) is fixedly connected to the connecting rod (11); A mounting frame (6) is fixedly mounted on the connecting pipe (3), a driving motor (8) is arranged on the mounting frame (6), a threaded rod (7) is fixedly mounted on the output end of the shaft of the driving motor (8), a nut pair (14) is threadedly connected to the threaded rod (7), and the nut pair (14) is fixedly connected to the connecting ring (9).

2. The coal injection device for an ironmaking plant according to claim 1, characterized in that: Two mounting rods (15) are fixedly mounted on one end of the connecting pipe (3) close to the control valve (2), and a fixed cleaning ring (16) is fixedly mounted on the mounting rod (15), and the fixed cleaning ring (16) is in contact with the inner wall of the moving pipe (4).

3. The coal injection device for ironmaking plant according to claim 2, characterized in that: Two slide blocks (17) are fixedly mounted on the fixed cleaning ring (16), and a slide groove (18) adapted to the slide blocks (17) is provided on the connecting pipe (3).

4. A coal injection device for ironmaking plant according to claim 1, 2 or 3, characterized in that: A movable cleaning ring (20) is fixedly mounted on one end of the movable tube (4) close to the connecting tube (3); the movable cleaning ring (20) is in contact with the inner wall of the connecting tube (3); and a sealing rubber ring (19) is inlaid on the movable tube (4).

5. A coal injection device for ironmaking plant according to claim 1, 2 or 3, characterized in that: The steelmaking blast furnace (21) is provided with insertion holes (22) at even intervals for the nozzle (5) at the front end of the moving pipe (4) to be inserted.

6. The coal injection device for ironmaking plant according to claim 4, characterized in that: The steelmaking blast furnace (21) is provided with insertion holes (22) at even intervals for the nozzle (5) at the front end of the moving pipe (4) to be inserted.

7. The coal injection device for ironmaking plant according to claim 6, characterized in that: The steelmaking blast furnace (21) is provided with a limiting groove (23) at the edge of each insertion hole (22), and the limiting groove (23) is composed of two parts: a groove for the limiting block (13) to be placed in and a groove for the limiting block (13) to rotate.

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