Oxygen blowing device for tapping hole of electric arc furnace

Abstract

The utility model relates to an oxygen blowing device for a tapping hole of an electric arc furnace and belongs to the field of metallurgical industry. The oxygen blowing device comprises an oxygen control system and is structurally characterized by further comprising a lifting mechanism, a lifting mechanism, a rotating mechanism and an oxygen blowing mechanism, the lifting mechanism is installed on the lifting mechanism, the rotating mechanism and the oxygen blowing mechanism are both installed on the lifting mechanism, the oxygen blowing mechanism is controlled by the rotating mechanism, and the oxygen blowing mechanism is installed on the lifting mechanism. The oxygen blowing mechanism is connected with the oxygen control system, the lifting mechanism comprises a fixed rack, a lifting air cylinder, an air cylinder hinge seat, a floating connector and a guide rail, the air cylinder hinge seat and the guide rail are both installed on the fixed rack, a cylinder barrel of the lifting air cylinder is installed on the air cylinder hinge seat, a piston rod of the lifting air cylinder is connected with the floating connector, and the floating connector is connected with the lifting air cylinder. The floating connector is connected with the lifting mechanism, and the lifting mechanism is installed on the guide rail.

Description

Technical Field

[0001] The utility model relates to an oxygen blowing device for a steel outlet of an electric arc furnace, belonging to the field of metallurgical industry. Background Art

[0002] Furnace maintenance is an inevitable problem for smelting equipment. Usually, the furnace maintenance process is one of the main points of safety accidents. After the electric furnace smelting is completed, the tapping port often fails to open and the steel cannot be tapped. This blockage is mainly due to the fact that the tapping port is blocked by sand filling and cannot be effectively melted. Generally, equipment maintenance units use oxygen blowing pipes to manually blow oxygen to open and clean. This process is inefficient and has a high risk factor. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned shortcomings in the prior art and to provide an electric arc furnace steel outlet oxygen blowing device with a rationally designed oxygen blowing head and an eccentric structure arrangement of the electric arc furnace.

[0004] The technical solution adopted by the utility model to solve the above problems is: the oxygen blowing device at the steel outlet of the electric arc furnace includes an oxygen control system, and its structural characteristics are: it also includes a lifting mechanism, a lifting mechanism, a rotating mechanism and an oxygen blowing mechanism, the lifting mechanism is installed on the lifting mechanism, the rotating mechanism and the oxygen blowing mechanism are both installed on the lifting mechanism, and the oxygen blowing mechanism is controlled by the rotating mechanism, and the oxygen blowing mechanism is connected to the oxygen control system.

[0005] Furthermore, the lifting mechanism includes a fixed frame, a lifting cylinder, a cylinder articulated seat, a floating joint and a guide rail, the cylinder articulated seat and the guide rail are both installed on the fixed frame, the cylinder barrel of the lifting cylinder is installed on the cylinder articulated seat, the piston rod of the lifting cylinder is connected to the floating joint, the floating joint is connected to the lifting mechanism, and the lifting mechanism is installed on the guide rail.

[0006] Furthermore, the lifting mechanism includes a guide roller, a lifting body and a bearing seat, the guide roller and the bearing seat are both installed on the lifting body, and the guide roller is slidably matched with the guide rail, the lifting body is connected to the floating joint, and the oxygen blowing mechanism is installed on the bearing seat.

[0007] Furthermore, the rotating mechanism includes a rotating cylinder, a cylinder mounting seat and a crank, the cylinder mounting seat is installed on the lifting vehicle body, the cylinder barrel of the rotating cylinder is installed on the cylinder mounting seat, the piston rod of the rotating cylinder is connected to the crank, and the crank is connected to the oxygen blowing mechanism.

[0008] Furthermore, the oxygen blowing mechanism includes an oxygen blowing pipe, a rotating shaft and an oxygen blowing head, one end of the oxygen blowing pipe is connected to the rotating shaft, the other end of the oxygen blowing pipe is connected to the oxygen blowing head, the rotating shaft is installed on a bearing seat, and the rotating shaft is connected to a crank.

[0009] Furthermore, the oxygen blowing pipe is connected to the oxygen control system through a hose.

[0010] Furthermore, the rotating shaft is a hollow shaft, one end of which is connected to the hose and the other end of which is connected to the oxygen blowing pipe.

[0011] Furthermore, the oxygen blowing tube is arranged in an L-shaped structure.

[0012] Furthermore, the lifting mechanism is installed on the furnace platform.

[0013] Furthermore, an electric arc furnace is installed on the furnace body platform, a steel outlet is provided at the bottom of the electric arc furnace, and the steel outlet cooperates with an oxygen blowing head.

[0014] Compared with the prior art, the utility model has the following advantages: when the electric arc furnace steel-making port oxygen blowing device is used for pouring and cleaning, the automatic oxygen blowing function of the steel-making port can be realized, thus avoiding manual oxygen blowing and pouring, reducing the safety hazards caused by the process and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the installation structure of the electric arc furnace steel outlet oxygen blowing device according to the embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the main structure of the lifting mechanism of an embodiment of the utility model.

[0017] Figure 3 It is a schematic diagram of the main structure of the lifting mechanism and the rotating mechanism of the embodiment of the utility model.

[0018] Figure 4 It is a schematic diagram of the main structure of the oxygen blowing mechanism of an embodiment of the utility model.

[0019] In the figure: furnace platform 1, lifting mechanism 2, lifting mechanism 3, rotating mechanism 4, oxygen blowing mechanism 5, electric arc furnace 6, steel outlet 7,

[0020] Fixed frame 21, lifting cylinder 22, cylinder hinge seat 23, floating joint 24, guide rail 25,

[0021] Guide roller 31, lifting body 32, bearing seat 33,

[0022] Rotating cylinder 41, cylinder mounting seat 42, crank 43,

[0023] Oxygen blowing pipe 51 , rotating shaft 52 , and oxygen blowing head 53 . DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0025] Example

[0026] See also Figures 1 to 4 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0027] The oxygen blowing device for the steel-blowout port of an electric arc furnace in this embodiment comprises an oxygen control system, a lifting mechanism 2, a lifting mechanism 3, a rotating mechanism 4 and an oxygen blowing mechanism 5. The lifting mechanism 3 is mounted on the lifting mechanism 2, the rotating mechanism 4 and the oxygen blowing mechanism 5 are both mounted on the lifting mechanism 3, and the oxygen blowing mechanism 5 is controlled by the rotating mechanism 4. The oxygen blowing mechanism 5 is connected to the oxygen control system. The lifting mechanism 2 is mounted on a furnace body platform 1, an electric arc furnace 6 is mounted on the furnace body platform 1, and a steel-blowout port 7 is arranged at the bottom of the electric arc furnace 6.

[0028] The lifting mechanism 2 in this embodiment includes a fixed frame 21, a lifting cylinder 22, a cylinder articulated seat 23, a floating joint 24 and a guide rail 25. The cylinder articulated seat 23 and the guide rail 25 are both installed on the fixed frame 21. The cylinder barrel of the lifting cylinder 22 is installed on the cylinder articulated seat 23. The piston rod of the lifting cylinder 22 is connected to the floating joint 24. The floating joint 24 is connected to the lifting mechanism 3, and the lifting mechanism 3 is installed on the guide rail 25.

[0029] The fixed frame 21 is mainly welded from Q235B steel plates, and the bottom is fixed to the cylinder hinge seat 23. The pin hinges the cylinder barrel of the lifting cylinder 22 to the cylinder hinge seat 23, and the piston rod of the lifting cylinder 22 is connected to the lifting body 32 through the floating joint 24. This fixing method makes the lifting cylinder 22 more flexible in movement; it prevents the cylinder from being stuck due to slight deformation of the equipment caused by the harsh environment during use; at the same time, the entire lifting cylinder 22 is inside the fixed frame, which effectively avoids damage to the cylinder caused by splashing of molten steel and high temperature during smelting; the guide rail 25 adopts a linear motion guide rail with a 90° V-groove design, which is suitable for a variety of harsh environments such as high temperature and dust.

[0030] The lifting mechanism 3 in this embodiment includes a guide roller 31, a lifting body 32 and a bearing seat 33. The guide roller 31 and the bearing seat 33 are both installed on the lifting body 32, and the guide roller 31 is slidably matched with the guide rail 25. The lifting body 32 is connected to the floating joint 24, and the oxygen blowing mechanism 5 is installed on the bearing seat 33.

[0031] The guide roller 31 adopts a double-row angular contact bearing structure in its internal structure to meet the requirements of dynamic load conditions. At the same time, a sealed and dustproof roller structure is adopted to effectively prevent dust and dirt from affecting the smoothness of the guide wheel. The guide roller 31 is fixed to the guide wheel mounting slider by bolts, and the guide wheel mounting slider can slide on the guide wheel mounting seat with one degree of freedom; the lifting car body 32 is made of carbon steel material and annealed after processing. The trolley ensures good rigidity and physical properties. The bearing seat adopts a vertical seat bearing to facilitate the adjustment of the concentricity of the two bearings.

[0032] The rotating mechanism 4 in this embodiment includes a rotating cylinder 41, a cylinder mounting seat 42 and a crank 43. The cylinder mounting seat 42 is installed on the lifting body 32, the cylinder barrel of the rotating cylinder 41 is installed on the cylinder mounting seat 42, the piston rod of the rotating cylinder 41 is connected to the crank 43, and the crank 43 is connected to the oxygen blowing mechanism 5.

[0033] The rotating cylinder 41 is hinged and fixed on the lifting car body 32 through a cylinder mounting seat 42; the piston rod of the rotating cylinder 41 is connected to the crank 43 through a pin; the crank 43 is connected to the rotating shaft 52 through a flat key, and the end is tightened with a fine-pitch nut; the rotating cylinder 41 is provided with a magnetic switch for easy acquisition of the in-position signal, and the above constitutes the rotating mechanism 4, which is driven by the rotating cylinder 41 to switch the oxygen blowing mechanism 5 between the standby position and the working position; the structure is simple, the stability is high, and it is easy to maintain.

[0034] The oxygen blowing mechanism 5 in this embodiment includes an oxygen blowing pipe 51, a rotating shaft 52 and an oxygen blowing head 53. One end of the oxygen blowing pipe 51 is connected to the rotating shaft 52, and the other end of the oxygen blowing pipe 51 is connected to the oxygen blowing head 53. The rotating shaft 52 is installed on the bearing seat 33, and the rotating shaft 52 is connected to the crank 43. The oxygen blowing pipe 51 is connected to the oxygen control system through a hose. The rotating shaft 52 is a hollow shaft, one end of which is connected to the hose and the other end is connected to the oxygen blowing pipe 51. The oxygen blowing pipe 51 is arranged in an L-shaped structure, and the steel outlet 7 cooperates with the oxygen blowing head 53.

[0035] The rotating shaft 52 is a hollow shaft, which is welded with the vertical pipe of the oxygen blowing pipe 51 and then processed so that the vertical pipe of the oxygen blowing pipe 51 is concentric with the rotating shaft 52 to prevent the oxygen blowing pipe 51 from winding due to excessive turning radius during rotation; the horizontal pipe of the oxygen blowing pipe 51 is sprayed with refractory material on the outside to prevent deformation caused by long-term high temperature; the horizontal pipe and the vertical pipe of the oxygen blowing pipe 51 are connected by a flange to facilitate subsequent disassembly; the oxygen blowing head 53 is a consumable, and will be burned by the molten steel flowing out of the steel outlet 7 after each oxygen blowing is completed, and needs to be replaced. The oxygen blowing head 53 is a quick-connect type, which is convenient for quick replacement.

[0036] Specifically, the oxygen blowing device at the steel-tipping port of the electric arc furnace is fixed on the furnace body platform 1, and its working process is as follows: when oxygen blowing is required at the steel-tipping port for pouring, the lifting cylinder 22 drives the lifting car body 32 to descend; then the rotating cylinder 41 drives the rotating shaft 52, so that the oxygen blowing head 53 on the oxygen blowing pipe 51 rotates to the working position, that is, it is aligned with the steel-tipping port 7; at this time, the oxygen control system is turned on to start oxygen blowing, and the flame is controlled by adjusting the oxygen flow rate through the oxygen control system until the steel-tipping port is blown through; when pouring is completed, the lifting cylinder 22 lowers the lifting car body 32 to the lowest position, and then the rotating cylinder 41 pulls the oxygen blowing mechanism 5 back to the standby position, and finally the lifting cylinder 22 pushes the oxygen blowing mechanism 5 to rise to the highest position; at this point, a working cycle is completed.

[0037] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. An oxygen blowing device for an electric arc furnace steel outlet, comprising an oxygen control system, characterized in that: It also comprises a lifting mechanism (2), a lifting mechanism (3), a rotating mechanism (4) and an oxygen blowing mechanism (5), wherein the lifting mechanism (3) is mounted on the lifting mechanism (2), the rotating mechanism (4) and the oxygen blowing mechanism (5) are both mounted on the lifting mechanism (3), the oxygen blowing mechanism (5) is controlled by the rotating mechanism (4), and the oxygen blowing mechanism (5) is connected to an oxygen control system.

2. The oxygen blowing device for the electric arc furnace tapping port according to claim 1 is characterized in that: The lifting mechanism (2) comprises a fixed frame (21), a lifting cylinder (22), a cylinder articulated seat (23), a floating joint (24) and a guide rail (25); the cylinder articulated seat (23) and the guide rail (25) are both mounted on the fixed frame (21); the cylinder barrel of the lifting cylinder (22) is mounted on the cylinder articulated seat (23); the piston rod of the lifting cylinder (22) is connected to the floating joint (24); the floating joint (24) is connected to the lifting mechanism (3); and the lifting mechanism (3) is mounted on the guide rail (25).

3. The oxygen blowing device for the electric arc furnace tapping port according to claim 1 is characterized in that: The lifting mechanism (3) comprises a guide roller (31), a lifting body (32) and a bearing seat (33); the guide roller (31) and the bearing seat (33) are both mounted on the lifting body (32); the guide roller (31) and the guide rail (25) are slidably matched; the lifting body (32) is connected to a floating joint (24); and the oxygen blowing mechanism (5) is mounted on the bearing seat (33).

4. The oxygen blowing device for the electric arc furnace tapping port according to claim 1 is characterized in that: The rotating mechanism (4) comprises a rotating cylinder (41), a cylinder mounting seat (42) and a crank (43); the cylinder mounting seat (42) is mounted on the lifting vehicle body (32); the cylinder barrel of the rotating cylinder (41) is mounted on the cylinder mounting seat (42); the piston rod of the rotating cylinder (41) is connected to the crank (43); and the crank (43) is connected to the oxygen blowing mechanism (5).

5. The oxygen blowing device for the electric arc furnace tapping port according to claim 1 is characterized in that: The oxygen blowing mechanism (5) comprises an oxygen blowing pipe (51), a rotating shaft (52) and an oxygen blowing head (53); one end of the oxygen blowing pipe (51) is connected to the rotating shaft (52), and the other end of the oxygen blowing pipe (51) is connected to the oxygen blowing head (53); the rotating shaft (52) is mounted on a bearing seat (33), and the rotating shaft (52) is connected to a crank (43).

6. The electric arc furnace tapping port oxygen blowing device according to claim 5, characterized in that: The oxygen blowing pipe (51) is connected to the oxygen control system via a hose.

7. The oxygen blowing device for the electric arc furnace tapping port according to claim 5, characterized in that: The rotating shaft (52) is a hollow shaft, one end of which is connected to a hose and the other end of which is connected to an oxygen blowing pipe (51).

8. The oxygen blowing device for the electric arc furnace tapping port according to claim 5, characterized in that: The oxygen blowing pipe (51) is arranged in an L-shaped structure.

9. The electric arc furnace tapping port oxygen blowing device according to claim 1, characterized in that: The lifting mechanism (2) is installed on the furnace platform (1).

10. The oxygen blowing device for the electric arc furnace tapping port according to claim 9, characterized in that: An electric arc furnace (6) is installed on the furnace platform (1), a steel outlet (7) is provided at the bottom of the electric arc furnace (6), and the steel outlet (7) cooperates with an oxygen blowing head (53).

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