Side wall oxygen lance with angle convenient to adjust

Abstract

The utility model relates to the technical field of side wall oxygen lance equipment, in particular to a side wall oxygen lance with the angle convenient to adjust. The furnace comprises a furnace body, a furnace cover is fixedly installed at the top of the furnace body, four protection boxes are fixedly connected to the furnace body in a circumferential arrangement mode, and gun bodies are arranged in the protection boxes. Through cooperation of fastening bolts, a reciprocating lead screw and a rotating block, during installation, connecting shafts on the two sides of a gun body are inserted into the fastening bolts on the two sides correspondingly, then the connecting shafts are fixed to a lifting plate and a sliding plate through fastening nuts correspondingly, and then the rotating block is rotated to drive the reciprocating lead screw to rotate; the lifting plate is driven by the reciprocating lead screw to move upwards, the lifting plate drives one end of the gun body to rotate upwards through the connecting shaft, the tail of the gun body is lifted when oxygen is used, the pipe opening angle of the gun body inclines downwards and is directly inserted into the molten steel surface, and therefore the oxygen blowing angle of the gun body avoids refractory materials in a furnace, and a water cooling plate on the opposite side is not prone to being damaged through blowing. And the phenomenon that the water-cooling plate is damaged by small resistance of oxygen on the horizontal slag surface is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of side wall oxygen lance equipment, especially to a side wall oxygen lance convenient to adjust angle. BACKGROUND

[0002] In the existing electric furnace steelmaking production, most of the side wall oxygen lances are installed on the furnace shell to supply oxygen to the furnace, which can accelerate the stirring of the molten pool in the furnace and improve the decarburization efficiency, especially in the high iron water ratio smelting mode, which can greatly shorten the electric furnace smelting cycle and improve the production efficiency.

[0003] A patent with publication number CN212581952U discloses an electric furnace small oxygen lance mounting structure, the electric furnace includes a furnace body, a furnace door is installed on the side wall of the furnace body, the furnace body is annularly arranged with nine water-cooled plates numbered 1#-9#, among which the 2# water-cooled plate, the 4# water-cooled plate, the 7# water-cooled plate and the 9# water-cooled plate are respectively fixed with jet oxygen lances with jet ports facing the inside of the furnace body, the furnace body wall at the position of the 3# water-cooled plate is installed with a scrap steel charging port, the 4# water-cooled plate, the 5# water-cooled plate, the 6# water-cooled plate and the 8# water-cooled plate are respectively fixed with small oxygen lances with jet ports facing the inside of the furnace body, by adopting the small oxygen lances arranged on the water-cooled plates cooperating with the jet oxygen lances, the melting effect of the cold steel along the furnace is good, the phenomenon that the furnace cover and the furnace rim are bonded together due to the cold steel and cannot be rotated is avoided, the unplanned downtime can be greatly reduced, and the production efficiency is improved.

[0004] At present, the oxygen lance in the prior art is fixed on the water-cooled plate, which is affected by the angle, and the oxygen lance will blow the refractory in the furnace when blowing oxygen, thereby accelerating the consumption of the refractory. Due to the blocking of the refractory, the penetration of the side wall oxygen lance to the molten steel is poor, which increases the consumption of the refractory and also increases the power consumption, thereby increasing the cost of steelmaking.

[0005] Therefore, a side wall oxygen lance convenient to adjust the angle is proposed to solve the above problems. SUMMARY

[0006] Therefore, the utility model wants to solve the technical problem of overcoming the problem that the oxygen lance in the prior art blows the refractory in the furnace when blowing oxygen and accelerates the consumption of the refractory.

[0007] To solve the above technical problems, the utility model provides a side wall oxygen lance convenient to adjust the angle.

[0008] In an embodiment of the utility model, the top of furnace body is fixedly installed with furnace cover, four protection boxes are fixedly connected on the circumference of furnace body, and gun bodies are arranged in the protection boxes.

[0009] In an embodiment of the utility model, two slide columns are fixedly connected on the inner wall of protection box, and the slide plate is slidably connected on the two slide columns.

[0010] In an embodiment of the utility model, fastening bolts are inserted on the connecting shafts, the bottom of fastening bolt is fixedly connected on the lifting plate and slide plate respectively, fastening nuts are arranged on the outside of fastening bolt, and the bottom of fastening nut is in contact with the connecting shaft.

[0011] In an embodiment of the utility model, four movable openings are formed on the furnace body, the gun bodies are arranged in the movable openings respectively, two supporting shafts are symmetrically arranged on the inner wall of movable opening, one end of supporting shaft is rotatably connected on the inner wall of movable opening, two fixed plates are symmetrically fixed on the outside of gun body, two slide grooves are formed in the fixed plate, springs are fixed on the inner wall of slide groove, arc-shaped plates are slidably connected in the slide grooves, and one end of spring is fixed on the arc-shaped plate.

[0012] In an embodiment of the utility model, the outside of protection box is provided with a sealing plate, and the four corners of sealing plate are installed on the protection box through bolts.

[0013] In an embodiment of the utility model, one end of gun body is communicated with air inlet pipe, the outside of air inlet pipe is fixedly connected with sealing ring, and the sealing ring is attached to the outside of sealing plate.

[0014] In an embodiment of the utility model, the bottom of furnace body is provided with a bottom plate, the top of both ends of bottom plate is fixedly connected with support plate, the top of support plate is rotatably connected on the furnace body through rotating shaft, the motor is fixed on one of support plates, and the output shaft of motor is fixed on one end of rotating shaft.

[0015] In an embodiment of the utility model, the bottom of furnace body is provided with a furnace door, a plurality of water cooling plates are arranged on the inner wall of furnace body, and corundum fire clay layer is filled in the gap between two water cooling plates.

[0016] Compared with the prior art, the above technical scheme of the utility model has the following advantages:

[0017] The utility model relates to a side wall oxygen lance convenient to adjust angle, through the cooperation of fastening bolt, reciprocating screw rod and swivel block, when installing, the connecting shaft of both sides of the lance body is respectively inserted on both sides fastening bolt, then through fastening nut, the connecting shaft is fixed together with the lifting plate and slide plate respectively, then through rotating swivel block, reciprocating screw rod is driven to rotate through swivel block, the lifting plate is driven to move upwards through reciprocating screw rod, the one end of the lance body is driven to rotate upwards through the connecting shaft, the tail of the lance body is lifted when using oxygen, makes the nozzle angle of the lance body to decline straightly and insert the steel liquid surface, thereby makes the oxygen blowing angle of the lance body to avoid the refractory in the furnace, is difficult to blow the opposite water cooling plate and breaks down, avoids the oxygen and the horizontal slag surface resistance small blow the water cooling plate and break down the phenomenon, the other side of the lance body drives the slide plate to move in the process that the one end of the lance body moves with the lifting plate, the slide plate slides on the slide post, and the slide post limits the slide plate to move in the vertical direction.

[0018] The utility model relates to a side wall oxygen lance convenient to adjust angle through the cooperation of support shaft, arc plate and spring, when installing, the middle part of the lance body passes through the movable mouth, and the arc plate is contacted with the support shaft, under the action of external force, extrudes the arc plate, under the action of spring, the arc plate slides to one end of the sliding slot in the fixed plate respectively, until the support shaft is arranged between the fixed plate and the arc plate, under the action of spring, the arc plate resets rapidly, realizes the function of fast installation on the support shaft, provides the rotating fulcrum for the lance body. ACCURACY OF DRAWINGS

[0019] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the attached drawing, the utility model is further detailed.

[0020] Figure 1 It is the perspective drawing of the utility model;

[0021] Figure 2 It is the perspective drawing of the furnace body in the utility model;

[0022] Figure 3 It is the perspective drawing of the lance body in the utility model;

[0023] Figure 4 It is the sectional view of the fixed plate and arc plate in the utility model;

[0024] Figure 5 It is the enlarged view of A in the utility model;

[0025] The specification reference signs are explained: 1, furnace body; 2, furnace cover; 3, protection box; 4, plugging plate; 5, rotating block; 6, lance body; 7, lifting plate; 8, sliding plate; 9, reciprocating screw rod; 10, sliding column; 11, connecting shaft; 12, air inlet pipe; 13, sealing ring; 14, supporting shaft; 15, movable port; 16, arc plate; 17, fixed plate; 18, spring; 19, fastening bolt; 20, fastening nut; 21, furnace door; 22, bottom plate; 23, supporting plate; 24, motor. DETAILED DESCRIPTION

[0026] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the example is not as the limitation of the utility model.

[0027] Referring to Figures 1-5 The utility model discloses a side wall oxygen lance convenient to adjust angle, including furnace body 1, the top fixed mounting of furnace body 1 has furnace cover 2, and the circumference of furnace body 1 is arranged and is fixedly connected with four protection boxes 3, and the protection box 3 is equipped with the lance body 6 in it;One end both sides of lance body 6 are rotatably connected with connecting shaft 11, and the outer side of connecting shaft 11 is equipped with lifting plate 7 and sliding plate 8 respectively, and reciprocating screw rod 9 is rotatably connected on the protection box 3, and lifting plate 7 is screw-connected on reciprocating screw rod 9, and the top of reciprocating screw rod 9 extends to the outside of protection box 3, and is fixedly connected with rotating block 5.

[0028] When working, the oxygen lance is fixedly connected, is influenced by the angle, and the oxygen lance can be blown into the furnace refractory when blowing oxygen, thereby accelerating the consumption of refractory, because of the refractory block, the penetration of the side wall oxygen lance to the molten steel is poor, increases the consumption of refractory and also increases the power consumption, thereby increasing the cost of steelmaking;So when installing, through connecting shaft 11 is installed on lifting plate 7 and sliding plate 8, then through rotating rotating block 5, through rotating block 5 drives reciprocating screw rod 9 to rotate, through reciprocating screw rod 9 drives lifting plate 7 to move upwards, lifting plate 7 drives one end of lance body 6 to rotate upwards through connecting shaft 11, and the tail of lance body 6 is lifted when using oxygen, makes the pipe angle of lance body 6 to decline straightly and insert the steel liquid surface, thereby the oxygen blowing angle of lance body 6 avoids the refractory in the furnace, and the opposite water-cooled plate is not easy to blow and damage, avoids the phenomenon that oxygen is blown and damaged in the water-cooled plate on the horizontal slag surface;And can improve the utilization rate of oxygen, reduce the oxygen level on the slag surface and blow, and oxygen is easy to be removed by dust extraction.

[0029] Further, as Figure 3 The inner wall of protection box 3 is fixedly connected with two sliding columns 10, and sliding plate 8 is slidably connected on the two sliding columns 10.

[0030] When working, one end of the gun body 6 moves with the movement of the lifting plate 7, and the other side of the gun body 6 drives the sliding plate 8 to move, the sliding plate 8 slides on the sliding column 10, and the sliding column 10 limits the movement of the sliding plate 8 in the vertical direction.

[0031] Further, as shown in Figure 5 The connecting shaft 11 is inserted with a fastening bolt 19, and the bottom of the fastening bolt 19 is fixed to the lifting plate 7 and the sliding plate 8, respectively. The outer side of the fastening bolt 19 is provided with a fastening nut 20, and the bottom of the fastening nut 20 is in contact with the connecting shaft 11.

[0032] When working, when installing the gun body 6, the connecting shaft 11 on both sides of the gun body 6 is inserted into the fastening bolt 19 on both sides, and then the connecting shaft 11 is fixed with the lifting plate 7 and the sliding plate 8 through the fastening nut 20, realizing the function of convenient installation and disassembly.

[0033] Further, as shown in Figure 3 And Figure 4 The furnace body 1 is provided with four movable openings 15, the gun body 6 is arranged in the movable opening 15, the inner wall of the movable opening 15 is provided with two supporting shafts 14, one end of the supporting shaft 14 is rotatably connected to the inner wall of the movable opening 15, the outer side of the gun body 6 is fixedly connected with two fixed plates (17), the fixed plate (17) is provided with two sliding grooves, the inner wall of the sliding groove is fixedly connected with a spring 18, the sliding groove is slidably connected with an arc-shaped plate 16, and one end of the spring 18 is fixedly connected to the arc-shaped plate 16.

[0034] When working, when installing the gun body 6, the middle part of the gun body 6 passes through the movable opening 15, the arc-shaped plate 16 contacts the supporting shaft 14, and under the action of external force, the arc-shaped plate 16 is extruded, the arc-shaped plate 16 slides to one end of the sliding groove in the fixed plate 17 under the action of the spring 18, and the supporting shaft 14 is arranged between the fixed plate 17 and the arc-shaped plate 16. Under the action of the spring 18, the arc-shaped plate 16 is quickly reset, realizing the function of quickly installing on the supporting shaft 14, and providing a rotating fulcrum for the gun body 6.

[0035] Further, as shown in Figure 2 The outer side of the protection box 3 is provided with a sealing plate 4, and the four corners of the sealing plate 4 are installed on the protection box 3 through bolts.

[0036] When working, the sealing plate 4 is fixedly installed on one side of the protection box 3 through bolts, which is convenient for installation and disassembly, and a sealing ring can also be arranged between the sealing plate 4 and the protection box 3 during installation, improving the sealing performance of the protection box 3.

[0037] Further, as shown in Figure 3As shown, one end of the gun body 6 is connected with the air inlet pipe 12, and the outer side of the air inlet pipe 12 is fixedly connected with the sealing ring 13 which is attached to the outer side of the blocking plate 4.

[0038] In operation, one end of the gun body 6 is connected with the air inlet pipe 12 through which oxygen is inputted; the sealing ring 13 is arranged to improve the sealing property of the protection box 3 and the furnace body 1 and the utilization rate of oxygen.

[0039] Further, as shown in Figure 1 The lower end of the furnace body 1 is provided with the bottom plate 22, the top of both ends of which is fixedly connected with the support plate 23, the top end of which is rotatably connected to the furnace body 1 through the rotating shaft, one of the support plates 23 is fixedly connected with the motor 24, and the output shaft of the motor 24 is fixedly connected to one end of the rotating shaft.

[0040] In operation, when the molten iron needs to be poured, the motor 24 is started to drive the rotating shaft to rotate through the output shaft of the motor 24, and the furnace body 1 is driven to rotate through the rotating shaft, so as to facilitate the rapid pouring of the molten iron.

[0041] Further, as shown in Figure 1 and Figure 2 The bottom end of the furnace body 1 is provided with the furnace door 21, the inner wall of the furnace body 1 is provided with a plurality of water-cooling plates, and the gap between two water-cooling plates is filled with the corundum fire mud layer.

[0042] In operation, the furnace door 21 is arranged to facilitate the pouring of the molten iron, the water-cooling plates are arranged to absorb the heat inside the furnace body 1 through the circulating water to prevent the furnace body 1 from overheating and protect the structure of the furnace body 1, and also help to control the temperature inside the furnace; the corundum fire mud layer is arranged to provide a heat insulation layer to reduce the heat transfer from the inside of the furnace body 1 to the outside; and the water-cooling plates are protected from the direct action of high temperature inside the furnace to prevent the water-cooling plates from overheating and being damaged.

[0043] Working principle: when installing, the connecting shaft 11 on both sides of the gun body 6 is respectively inserted on the fastening bolt 19 on both sides, then the connecting shaft 11 is fixed with the lifting plate 7 and the sliding plate 8 respectively through the fastening nut 20, then the gun body 6 is rotated by rotating the rotating block 5, the lifting plate 7 is moved upward by the reciprocating screw rod 9, one end of the gun body 6 is rotated upward by the connecting shaft 11, the tail of the gun body 6 is lifted when using oxygen, the nozzle angle of the gun body 6 is downwardly inclined and inserted into the liquid surface, so that the oxygen blowing angle of the gun body 6 avoids the refractory in the furnace, and the water-cooled plate on the opposite side is not easy to be blown off, the phenomenon that the water-cooled plate is blown off by oxygen with small resistance on the horizontal slag surface is avoided; and the utilization rate of oxygen can be improved, and the oxygen blowing on the slag surface is reduced, the oxygen is easily removed by dust removal, and one end of the gun body 6 moves with the movement of the lifting plate 7, the other side of the gun body 6 drives the sliding plate 8 to move, the sliding plate 8 slides on the slide column 10, and the slide column 10 limits the movement of the sliding plate 8 in the vertical direction.

[0044] When installing the gun body 6, the middle part of the gun body 6 passes through the movable port 15, the arc-shaped plate 16 is in contact with the supporting shaft 14, the arc-shaped plate 16 is extruded under the action of an external force, the arc-shaped plate 16 slides to one end of the sliding groove in the fixed plate 17 under the action of the spring 18, and the supporting shaft 14 is arranged between the fixed plate 17 and the arc-shaped plate 16, the arc-shaped plate 16 is quickly reset under the action of the spring 18, the function of being quickly installed on the supporting shaft 14 is realized, and the rotating support point of the gun body 6 is provided.

[0045] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A side wall oxygen lance facilitating angle adjustment, comprising a furnace body (1), a furnace cover (2) fixedly installed on the top of the furnace body (1), four protection boxes (3) circumferentially arranged and fixedly connected on the furnace body (1), and a lance body (6) arranged in each of the protection boxes (3); characterized in that: One end of the gun body (6) is rotatably connected with connecting shafts (11) on both sides, the outer sides of the connecting shafts (11) are respectively provided with lifting plates (7) and sliding plates (8), the protective box (3) is rotatably connected with a reciprocating screw rod (9) through a bearing, the lifting plate (7) is threadedly connected on the reciprocating screw rod (9), and the top of the reciprocating screw rod (9) extends to the outside of the protective box (3) and is fixedly connected with a rotating block (5). ​ 2. The angle-adjustable sidewall oxygen lance according to claim 1, characterized in that: Two slide columns (10) are fixedly connected on the inner wall of the protective box (3), and the sliding plate (8) is slidably connected on the two slide columns (10).

3. The angle-adjustable sidewall oxygen lance according to claim 2, characterized in that: The connecting shafts (11) are respectively inserted with fastening bolts (19), the bottoms of the fastening bolts (19) are fixedly connected with the lifting plates (7) and the sliding plates (8), respectively, the outer sides of the fastening bolts (19) are respectively provided with fastening nuts (20), and the bottoms of the fastening nuts (20) are in contact with the connecting shafts (11).

4. The angle-adjustable sidewall oxygen lance according to claim 3, characterized in that: Four movable openings (15) are formed in the furnace body (1), the gun bodies (6) are arranged in the movable openings (15), respectively, two supporting shafts (14) are symmetrically arranged on the inner wall of the movable opening (15), one end of the supporting shaft (14) is rotatably connected with the inner wall of the movable opening (15), the outer sides of the gun bodies (6) are symmetrically fixedly connected with two fixed plates (17), two sliding grooves are formed in the fixed plate (17), springs (18) are fixedly connected on the inner wall of the sliding groove, arc-shaped plates (16) are slidably connected in the sliding grooves, and one end of the spring (18) is fixedly connected with the arc-shaped plate (16).

5. The angle-adjustable sidewall oxygen lance according to claim 4, characterized in that: The outer sides of the protective box (3) are respectively provided with sealing plates (4), and the four corners of the sealing plate (4) are bolted on the protective box (3).

6. The angle-adjustable sidewall oxygen lance according to claim 5, characterized in that: One end of the gun body (6) is connected with an air inlet pipe (12), the outer side of the air inlet pipe (12) is fixedly connected with a sealing ring (13), and the sealing ring (13) is attached to the outer side of the sealing plate (4).

7. The angle-adjustable sidewall oxygen lance according to claim 6, characterized in that: The lower portion of the furnace body (1) is provided with a bottom plate (22), the top of the two ends of the bottom plate (22) is fixedly connected with a support plate (23), the top of the support plate (23) is rotatably connected with the furnace body (1) through a rotating shaft, one of the support plates (23) is fixedly connected with a motor (24), and the output shaft of the motor (24) is fixedly connected with one end of the rotating shaft.

8. The angle-adjustable sidewall oxygen lance according to claim 7, characterized in that: The bottom end of the furnace body (1) is provided with a furnace door (21), a plurality of water cooling plates are arranged on the inner wall of the furnace body (1), and a corundum fire mud layer is filled in the gap between two water cooling plates.

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