Supersonic circulating combustion carbon-oxygen composite spray gun device of electric arc furnace

Abstract

The utility model discloses an electric arc furnace supersonic speed ring combustion carbon oxygen composite spray gun device which comprises a first communicating pipe, a second communicating pipe is arranged above the first communicating pipe, and first flange plates are fixedly arranged at the upper end of the outer portion of the first communicating pipe and the lower end of the outer portion of the second communicating pipe. A heat conducting plate is fixedly arranged at the lower end of the exterior of the first communicating pipe, a liquid inlet pipe is fixedly arranged at the upper end of one side of the heat conducting plate, a liquid outlet pipe is fixedly arranged at the lower end of the other side of the heat conducting plate, a cooling pipe is arranged in the heat conducting plate and distributed in a spiral structure, and the two ends of the cooling pipe communicate with the liquid outlet pipe and the liquid inlet pipe correspondingly; according to the structure, the problems that the protection performance of the first communicating pipe is not good enough, and the pipeline is difficult to replace are solved.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace smelting technology, specifically to a supersonic cyclic combustion carbon-oxygen composite spray gun device for electric arc furnaces. Background Technology

[0002] The electric arc furnace supersonic ephemeral combustion carbon-oxygen composite spray lance device is a high-efficiency electric arc furnace smelting equipment that integrates supersonic injection, ephemeral combustion, and carbon-oxygen composite functions. The spray lance device is usually composed of a lance rod, sealing components, powder inlet components, cluster nozzle components, central hole, combustion orientation chamber, and other structures. In use, the powder enters the cluster nozzle through the powder pipe and is injected into the molten steel under the shroud of supersonic oxygen. The oxygen and fuel gas mix and burn in the ephemeral combustion orifice and the epoxy orifice to form a high-temperature flame, which accompanies and compresses the supersonic oxygen jet to form a cluster jet.

[0003] For example, Chinese patent CN209338599U, entitled "An Oxygen Lance for Steelmaking," includes an outer tube and an inner tube fitted inside the outer tube. The outer tube includes a first outer straight tube section at its head and an outer tapered tube section at its tail. The large-diameter end of the outer tapered tube section faces the head of the outer tube and extends towards the head of the outer tube, forming a second outer straight tube section. The second outer straight tube section is connected to the first outer straight tube section through an outer reducing pipe. The inner tube passes through the outer tube and is connected to an oxygen inlet at the head of the outer tube, and a nozzle is connected to the tail of the outer tube, forming an oxygen channel. A nitrogen inlet is connected to the first outer straight tube section on the side of the oxygen inlet.

[0004] While the existing technologies described above enable the use of the spray gun, in practical applications, the first connecting pipe has several drawbacks. Firstly, its protective performance is insufficient, as it typically extends into the electric arc furnace, causing heat from the furnace to be transferred to the first connecting pipe, thus accelerating its aging. Secondly, pipe replacement is difficult, as wear and tear during use necessitates replacing the entire pipe, increasing maintenance costs. Therefore, these technologies do not meet current requirements. To address this, we propose a supersonic cyclic combustion carbon-oxygen composite spray gun device for electric arc furnaces. Utility Model Content

[0005] The purpose of this invention is to provide a supersonic cyclic combustion carbon-oxygen composite spray gun device for electric arc furnaces, in order to solve the problems mentioned in the background art, such as the insufficient anti-corrosion performance of the first connecting pipe and the difficulty in replacing the pipe.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace, comprising a first connecting pipe, a second connecting pipe disposed above the first connecting pipe, a first flange fixedly disposed at the upper end of the outside of the first connecting pipe and the lower end of the outside of the second connecting pipe, a heat-conducting plate fixedly disposed at the lower end of the outside of the first connecting pipe, a liquid inlet pipe fixedly disposed at the upper end of one side of the heat-conducting plate, a liquid outlet pipe fixedly disposed at the lower end of the other side of the heat-conducting plate, and a cooling pipe disposed inside the heat-conducting plate, the cooling pipes being distributed in a spiral structure, and both ends of the cooling pipes being connected to the liquid outlet pipe and the liquid inlet pipe, respectively.

[0007] Preferably, a plurality of first bolts are provided above the first flange on the second connecting pipe. The first bolts are distributed in a ring at equal intervals, and the lower end of the first bolts penetrates and extends to the bottom of the first flange. A first nut is sleeved on the outside of the lower end of the first bolt, and the first nut contacts the first flange.

[0008] Preferably, connecting pipes are fixedly installed below both sides of the second connecting pipe, a powder pipe is installed above the connecting pipe on one side of the second connecting pipe, and a gas pipe is installed above the connecting pipe on the other side of the second connecting pipe. A second flange is fixedly installed at the lower end of the gas pipe, the powder pipe and the upper end of the connecting pipe.

[0009] Preferably, a fixing ring is fixedly installed above the outside of the second connecting pipe, and a clamping plate is fixedly installed on one side of the fixing ring, the clamping plate being sleeved on the outside of the gas pipe and the powder pipe.

[0010] Preferably, a number of second bolts are provided at the upper end of the second flange on the gas pipe and the powder pipe. The second bolts are distributed in a ring at equal intervals, and the lower end of the second bolts penetrates and extends to the bottom of the second flange. A second nut is sleeved on the outside of the lower end of the second bolt, and the second nut contacts the second flange.

[0011] Preferably, the heat-conducting plate is fitted with a heat insulation cover.

[0012] Preferably, an oxygen pipe is fixedly provided at the upper end of the second connecting pipe, and the oxygen pipe is connected to the second connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model can cool down the first connecting pipe by means of a cooling pipe and a heat-conducting plate. When the spray gun is used, the first connecting pipe has entered the electric arc furnace. The heat inside the furnace is transferred to the pipe wall of the first connecting pipe. At this time, the operator turns on the external water pump, so that the water pump draws the coolant and delivers the coolant to the inlet pipe. At the same time, the coolant enters the cooling pipe through the inlet pipe. At this time, the heat on the pipe wall is transferred to the heat-conducting plate. The heat on the heat-conducting plate is transferred to the coolant through the cooling pipe, so that the temperature of the coolant rises. At this time, the coolant that has absorbed the heat is discharged from the cooling pipe through the outlet pipe, thus completing the cooling treatment of the first connecting pipe and extending the service life of the first connecting pipe.

[0015] (2) This utility model can connect and fix the pipeline through the first flange and the second flange. When connecting the first connecting pipe and the second connecting pipe, the operator first moves the second connecting pipe to a suitable position. At this time, the first flange on the second connecting pipe contacts the first flange on the first connecting pipe. Then, the first bolt passes through the two first flanges. At this time, the first nut is sleeved on the outside of the first bolt and rotated until the first nut is moved to a suitable position. When connecting the powder pipe, gas pipe and connecting pipe, the operator presses the powder pipe and gas pipe into the clamping plate and moves the powder pipe and gas pipe downward so that the second flange on the powder pipe and gas pipe contacts the second flange on the connecting pipe. At this time, the second flange is fixed by the second bolt and the second nut, thereby improving the flexibility of pipeline replacement.

[0016] (3) By providing a heat insulation cover, this utility model can reduce the heat transfer to the heat conduction plate. When the spray gun is in use, the electric arc furnace will generate high temperature. At this time, the heat insulation cover set outside the heat conduction plate can isolate some of the heat and prevent the heat inside the furnace from being transferred to the heat conduction plate, thereby improving the cooling effect of the cooling pipe. At the same time, the heat insulation cover can reduce the heat load on the spray gun and reduce the risk of the spray gun being damaged due to high temperature. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model;

[0018] Figure 2 This is a front view of the internal structure of this utility model;

[0019] Figure 3 This is a side view of the internal structure of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Enlarged view of a portion of region A in the middle.

[0021] In the diagram: 1. First connecting pipe; 2. Second connecting pipe; 3. Heat-conducting plate; 4. Heat insulation cover; 5. Liquid outlet pipe; 6. Liquid inlet pipe; 7. First flange; 8. First bolt; 9. First nut; 10. Oxygen pipe; 11. Powder pipe; 12. Gas pipe; 13. Fixing ring; 14. Clamping plate; 15. Second flange; 16. Connecting pipe; 17. Second bolt; 18. Second nut; 19. Cooling pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 An embodiment of this utility model is provided: a supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace, including a first connecting pipe 1, a second connecting pipe 2 disposed above the first connecting pipe 1, an oxygen pipe 10 fixedly disposed at the upper end of the second connecting pipe 2, and the oxygen pipe 10 communicating with the second connecting pipe 2.

[0024] Please see Figure 1 , Figure 2 and Figure 4 A first flange 7 is fixedly installed at the upper end of the first connecting pipe 1 and the lower end of the second connecting pipe 2. Several first bolts 8 are installed above the first flange 7 on the second connecting pipe 2, arranged in a ring at equal intervals. The lower ends of the first bolts 8 penetrate and extend below the first flange 7. A first nut 9 is fitted onto the lower end of each first bolt 8, contacting the first flange 7. Connecting pipes 16 are fixedly installed on the lower sides of both sides of the second connecting pipe 2. A powder pipe 11 is installed above the connecting pipe 16 on one side of the second connecting pipe 2, and a gas pipe 12 is installed above the connecting pipe 16 on the other side of the second connecting pipe 2. Second bolts 8 are fixedly installed at the lower ends of the gas pipe 12, the powder pipe 11, and the upper ends of the connecting pipes 16. A fixing ring 13 is fixedly installed above the outside of the flange 15 and the second connecting pipe 2. A clamping plate 14 is fixedly installed on one side of the fixing ring 13. The clamping plate 14 is sleeved on the outside of the gas pipe 12 and the powder pipe 11. Several second bolts 17 are provided on the upper end of the second flange 15 on the gas pipe 12 and the powder pipe 11. The second bolts 17 are distributed in a ring at equal intervals, and the lower end of the second bolts 17 passes through and extends to the bottom of the second flange 15. A second nut 18 is sleeved on the outside of the lower end of the second bolt 17. The second nut 18 contacts the second flange 15, which facilitates the fixed connection of different pipes through the second flange 15 and the first flange 7. At the same time, the clamping plate 14 can prevent the gas pipe 12 and the powder pipe 11 from shaking during operation.

[0025] Please see Figure 1 , Figure 2 and Figure 3 A heat-conducting plate 3 is fixedly installed at the lower end of the outside of the first connecting pipe 1. An inlet pipe 6 is fixedly installed at the upper end of one side of the heat-conducting plate 3, and an outlet pipe 5 is fixedly installed at the lower end of the other side of the heat-conducting plate 3. A cooling pipe 19 is installed inside the heat-conducting plate 3. The cooling pipe 19 is distributed in a spiral structure, and the two ends of the cooling pipe 19 are connected to the outlet pipe 5 and the inlet pipe 6 respectively, so as to facilitate the cooling of the first connecting pipe 1 through the cooling pipe 19 and the heat-conducting plate 3.

[0026] Please see Figure 1 and Figure 2 The heat-conducting plate 3 is fitted with a heat insulation cover 4, which facilitates the reduction of heat transfer from the furnace to the heat-conducting plate 3.

[0027] Working principle: During use, the first connecting pipe 1 has entered the electric arc furnace. The heat inside the furnace is transferred to the wall of the first connecting pipe 1. At this time, the operator turns on the external water pump, which draws coolant and delivers it to the inlet pipe 6. Simultaneously, the coolant enters the cooling pipe 19 through the inlet pipe 6. The heat on the pipe wall is transferred to the heat-conducting plate 3, and the heat on the heat-conducting plate 3 is transferred to the coolant through the cooling pipe 19, causing the coolant temperature to rise. The coolant, having absorbed heat, is then discharged from the cooling pipe 19 through the outlet pipe 5. When connecting the first connecting pipe 1 and the second connecting pipe 2, the operator first moves the second connecting pipe 2 to a suitable position. The first flange 7 on the connecting pipe 2 contacts the first flange 7 on the first connecting pipe 1, and then the first bolt 8 passes through the two first flanges 7. At this time, the first nut 9 is sleeved on the outside of the first bolt 8 and rotated until the first nut 9 is moved to a suitable position. When connecting the powder pipe 11, the gas pipe 12 and the connecting pipe 16, the operator presses the powder pipe 11 and the gas pipe 12 into the clamping plate 14 and moves the powder pipe 11 and the gas pipe 12 downward so that the second flange 15 on the powder pipe 11 and the gas pipe 12 contacts the second flange 15 on the connecting pipe 16. At this time, the second flange 15 is fixed by the second bolt 17 and the second nut 18.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace, comprising a first connecting pipe (1), characterized in that: A second connecting pipe (2) is provided above the first connecting pipe (1). A first flange (7) is fixedly provided at the upper end of the first connecting pipe (1) and the lower end of the second connecting pipe (2). A heat-conducting plate (3) is fixedly provided at the lower end of the first connecting pipe (1). An inlet pipe (6) is fixedly provided at the upper end of one side of the heat-conducting plate (3). An outlet pipe (5) is fixedly provided at the lower end of the other side of the heat-conducting plate (3). A cooling pipe (19) is provided inside the heat-conducting plate (3). The cooling pipe (19) is distributed in a spiral structure, and the two ends of the cooling pipe (19) are connected to the outlet pipe (5) and the inlet pipe (6) respectively.

2. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 1, characterized in that: A number of first bolts (8) are provided above the first flange (7) on the second connecting pipe (2). The first bolts (8) are distributed in a ring at equal intervals, and the lower end of the first bolt (8) extends through and to the bottom of the first flange (7). A first nut (9) is sleeved on the outside of the lower end of the first bolt (8), and the first nut (9) contacts the first flange (7).

3. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 2, characterized in that: A connecting pipe (16) is fixedly installed on the lower sides of both sides of the second connecting pipe (2). A powder pipe (11) is installed above the connecting pipe (16) on one side of the second connecting pipe (2). A gas pipe (12) is installed above the connecting pipe (16) on the other side of the second connecting pipe (2). A second flange (15) is fixedly installed at the lower end of the gas pipe (12), the powder pipe (11), and the upper end of the connecting pipe (16).

4. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 3, characterized in that: A fixing ring (13) is fixedly installed above the outside of the second connecting pipe (2). A clamping plate (14) is fixedly installed on one side of the fixing ring (13). The clamping plate (14) is sleeved on the outside of the gas pipe (12) and the powder pipe (11).

5. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 4, characterized in that: Several second bolts (17) are provided on the upper end of the second flange (15) on the gas pipe (12) and powder pipe (11). The second bolts (17) are distributed in a ring at equal intervals, and the lower end of the second bolts (17) passes through and extends to the bottom of the second flange (15). A second nut (18) is sleeved on the outside of the lower end of the second bolt (17), and the second nut (18) contacts the second flange (15).

6. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 5, characterized in that: The heat-conducting plate (3) is fitted with a heat insulation cover (4).

7. The supersonic cyclic combustion carbon-oxygen composite spray gun device for an electric arc furnace according to claim 6, characterized in that: An oxygen pipe (10) is fixedly installed at the upper end of the second connecting pipe (2), and the oxygen pipe (10) is connected to the second connecting pipe (2).

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