Electric arc heating steel smelting furnace with safety protection function

Abstract

This utility model discloses an electric arc heating steelmaking furnace with safety protection function, belonging to the field of steelmaking technology. The technical solution is as follows: it includes a furnace base (1), an oxygen supply machine (2), a furnace body (3), a lifting component (5), and a safety protection component (6). The furnace base (1) is provided with an installation groove (8) that cooperates with the furnace body (3). The furnace body (3) is provided with an exhaust valve (4), an oxygen inlet pipe (9), a support shaft (10), a molten steel discharge pipe (11), and a bottom toothed roller (12). The oxygen inlet pipe (9) is connected to the oxygen supply machine (2) through the oxygen supply pipe (15). The support shaft (10) is rotatably connected to the furnace base (1). The bottom toothed roller (12) is fixed to the bottom of the furnace body (3). The beneficial effect of this utility model is that the angle of the furnace body can be adjusted by the safety protection component (6) to realize the control of the molten steel discharge. Moreover, after the furnace body is adjusted to the maximum tilt angle, it can automatically lock and support the furnace body, thereby improving the overall safety of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of steelmaking technology in the metallurgical industry, and in particular relates to an electric arc heating steelmaking furnace with safety protection function. Background Technology

[0002] The core of steelmaking is to reduce carbon content and remove harmful elements such as sulfur and phosphorus through oxidation reactions. The steelmaking furnace is a crucial piece of equipment in the smelting process. Chinese patent disclosure (CN109520316A) describes an environmentally friendly steelmaking furnace, comprising a furnace body, a bottom plate, a waste gas treatment box, a swing module, a column, a purification module, and a telescopic exhaust bladder. The top of the furnace body is connected to the bottom of the waste gas treatment box via a gas guide pipe. A solenoid valve is installed at the connection point between the waste gas treatment box and the gas guide pipe. A pull rope is installed on the inner wall of the waste gas treatment box via a guide wheel. The column is fixedly connected to the center of the bottom of the waste gas treatment box. The swing module is arranged at the top inside the waste gas treatment box. The telescopic exhaust bladder is arranged inside the waste gas treatment box, with one end connected to the solenoid valve and the other end fixedly connected to a connecting plate. A compression spring is fixedly connected between the connecting plate and the outer surface of the column. The top of the connecting plate is fixedly connected to the other end of the pull rope. This steelmaking furnace can remove impurities from waste gas and accelerate the flow of the treatment liquid, thereby ensuring thorough mixing between the waste gas and the treatment liquid and effectively improving the waste gas treatment efficiency. While this steelmaking furnace, and other existing steelmaking furnaces, can perform steelmaking operations, their steelmaking efficiency is low. Furthermore, when removing the high-temperature molten steel after steelmaking, the entire furnace body needs to be tilted, and this process lacks locking or protective structures, posing significant safety hazards and resulting in poor practical application. To solve these problems, there is an urgent need for an electric arc heating steelmaking furnace with safety protection functions. Utility Model Content

[0003] The purpose of this utility model is to provide an electric arc heating steelmaking furnace with safety protection function. By adjusting the angle of the furnace body, the amount of molten steel discharged can be controlled. Moreover, after the furnace body is adjusted to the maximum tilt angle, it can automatically lock and support the furnace body angle, thereby improving the overall safety of the equipment and solving the problems in the background technology.

[0004] The technical solution of this utility model:

[0005] An electric arc heating steelmaking furnace with safety protection function includes a furnace base, an oxygen supply unit, a furnace body, a lifting assembly, and a safety protection assembly. The furnace base is provided with an installation groove that matches the furnace body. The furnace body is provided with an exhaust valve, an oxygen inlet pipe, a support shaft, a molten steel discharge pipe, and a bottom toothed roller. The oxygen inlet pipe is connected to the oxygen supply unit through an oxygen supply pipe. The support shaft is fixed to the side of the furnace body and is rotatably connected to the furnace base. The bottom toothed roller is fixed to the bottom of the furnace body.

[0006] The lifting assembly includes a furnace cover, electrode rod holes, a connecting frame, a hydraulic cylinder, and a base. The base is fixed on the furnace seat, and the hydraulic cylinder is fixed on the base. The hydraulic cylinder is driven by the furnace cover through the connecting frame. The furnace cover is provided with multiple electrode rod holes, and the furnace cover covers the furnace body.

[0007] The safety protection component includes a threaded shaft, a safety protection motor, a moving block, a locking rack, and a slide groove. The output shaft of the safety protection motor is connected to the threaded shaft, which is fixed to the side of the furnace body. The threaded shaft corresponds to the support shaft. The moving block is threadedly connected to the threaded shaft and is slidably installed in the mounting groove through the slide groove at its bottom. The moving block is provided with multiple locking racks that cooperate with the bottom tooth roller.

[0008] The exhaust valve on the furnace body is located at the upper part of the furnace body, and the molten steel drain pipe is located at the lower part of the furnace body.

[0009] A conveying assembly is provided on the side of the molten steel drain pipe on the furnace body.

[0010] The conveying assembly includes a conveying ladder, conveying rollers, a conveying shell, and a storage mold. The conveying shell has multiple conveying rollers inside its cavity, each of which is driven by a conveying motor. Several storage molds are respectively set on the conveying rollers. One end of the conveying shell is provided with a conveying ladder that connects to the conveying rollers.

[0011] Both the oxygen inlet pipe and the oxygen supply pipe are equipped with sealing grooves, and the sealing grooves are equipped with sealing components to prevent oxygen leakage.

[0012] The sealing assembly includes a magnetic suction shaft and a thermal expansion sealing ring. Magnetic suction holes are provided in the sealing grooves of the oxygen inlet pipe and the oxygen supply pipe. The magnetic suction shaft is attracted to the magnetic holes, and the thermal expansion sealing ring is fixed on the magnetic suction shaft and located in the sealing groove.

[0013] The mounting groove is equipped with a guide rail that mates with the sliding groove at the bottom of the movable block.

[0014] The beneficial effects of this utility model are:

[0015] (1) During steelmaking, the furnace cover is moved upward by the hydraulic cylinder to introduce the raw materials into the furnace body. The furnace cover is then closed again. At this time, the electrodes on the outside are inserted into the furnace body through the electrode rod holes. The electrodes discharge and generate a large amount of heat, causing the material in the furnace body to melt to a liquid state at a high temperature. After melting, when it is necessary to discharge the molten steel, the furnace cover is first raised to a certain height, and the safety protection motor is directly turned on to control the rotation of the threaded shaft. The threaded shaft can drive the furnace body to tilt. When the molten steel discharge pipe is opened, the molten steel can be discharged automatically. The tilt angle of the entire furnace body can be controlled according to the amount of molten steel to be discharged. During the above process, when the threaded shaft rotates, it can also drive the moving block to move synchronously. The locking rack also moves laterally. When the furnace body reaches its maximum tilt angle, the locking rack can insert into the bottom toothed roller, thereby locking the position of the bottom toothed roller and the furnace body. At the same time, it can also provide a certain support and protection based on the tilted furnace body to avoid safety accidents. Through this design, molten steel can be effectively removed after steelmaking, and the amount of molten steel discharged can be controlled by adjusting the angle of the furnace body. The operation is simple, and it can automatically lock and support the furnace body angle after it is adjusted to the maximum tilt angle, which can greatly ensure the stability of the furnace body at this angle, ensure the molten steel discharge effect, and improve the overall safety of the equipment.

[0016] (2) During the steelmaking process, the oxygen supply machine can supply oxygen to the furnace through the oxygen supply pipe. The steelmaking process will generate a large amount of heat that radiates to the outside. After the thermal expansion sealing ring is heated, the volume expands. After expansion, the tightness of the contact between the thermal expansion sealing rings continues to increase. At this time, the sealing between the oxygen inlet pipe and the oxygen supply pipe is stably enhanced, which can effectively prevent oxygen leakage during the oxygen supply process, avoid waste of resources and avoid safety accidents. The thermal expansion sealing ring can be quickly disassembled and replaced regularly, which is simple and convenient to operate.

[0017] (3) After steelmaking, when molten steel is discharged, multiple conveying rollers can be opened to transport multiple receiving molds. When the receiving mold moves to the molten steel discharge pipe, it stops running and the molten steel can be injected into the receiving mold for storage. When the weight in the receiving mold reaches the standard, the transmission continues. This process is repeated to achieve continuous receiving and transportation of molten steel. During the transportation process, it also helps the molten steel to cool and form in the receiving mold, thus improving the actual application effect of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0020] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the combination of the lifting component, the safety protection component, and the furnace body in this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the lifting component in this utility model;

[0023] Figure 6 This is a three-dimensional exploded view of the safety protection components and the furnace body in this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the sealing component in this utility model;

[0025] In the diagram: 1. Furnace base; 2. Oxygen supply unit; 3. Furnace body; 4. Exhaust valve; 5. Lifting assembly; 6. Safety protection assembly; 7. Conveying assembly; 8. Mounting slot; 9. Oxygen inlet pipe; 10. Support shaft; 11. Molten steel drain pipe; 12. Bottom toothed roller; 13. Sealing assembly; 14. Mounting bushing; 15. Oxygen supply pipe;

[0026] 51. Furnace cover; 52. Electrode rod hole; 53. Connecting frame; 54. Hydraulic cylinder; 55. Base;

[0027] 61. Threaded shaft; 62. Safety protection motor; 63. Moving block; 64. Locking rack; 65. Slide groove;

[0028] 71. Conveyor ladder; 72. Conveyor roller; 73. Conveyor housing; 74. Storage mold;

[0029] 131. Magnetic suction shaft; 132. Thermal expansion sealing ring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and examples.

[0031] See attached document Figure 1-7 An electric arc heating steelmaking furnace with safety protection function includes a furnace base 1, an oxygen supply unit 2, a furnace body 3, a lifting assembly 5, and a safety protection assembly 6. The furnace base 1 is provided with an installation groove 8 that matches the furnace body 3. The furnace body 3 is provided with an exhaust valve 4, an oxygen inlet pipe 9, a support shaft 10, a molten steel discharge pipe 11, and a bottom toothed roller 12. The oxygen inlet pipe 9 is connected to the oxygen supply unit 2 through an oxygen supply pipe 15. The support shaft 10 is fixed to the side of the furnace body 3 and is rotatably connected to the furnace base 1. The bottom toothed roller 12 is fixed to the bottom of the furnace body 3.

[0032] The lifting assembly 5 includes a furnace cover 51, electrode rod holes 52, a connecting frame 53, a hydraulic cylinder 54, and a base 55. The base 55 is fixed on the furnace base 1, and the hydraulic cylinder 54 is fixed on the base 55. The hydraulic cylinder 54 is driven to the furnace cover 51 through the connecting frame 53. The furnace cover 51 is provided with multiple electrode rod holes 52, and the furnace cover 51 covers the furnace body 3.

[0033] The safety protection component 6 includes a threaded shaft 61, a safety protection motor 62, a moving block 63, a locking rack 64, and a slide groove 65. The output shaft of the safety protection motor 62 is connected to the threaded shaft 61. The threaded shaft 61 is fixed to the side of the furnace body 3 and corresponds to the support shaft 10. The moving block 63 is threadedly connected to the threaded shaft 61. The moving block 63 is slidably installed in the mounting groove 8 through the slide groove 65 provided at its bottom. The moving block 63 is provided with multiple locking racks 64 that cooperate with the bottom toothed roller 12.

[0034] In this embodiment, refer to the appendix Figure 1-7 The furnace base 1 is provided with an installation groove 8 and a side groove. An oxygen supply machine 2 is fixedly installed in the side groove. An oxygen supply pipe 15 is fixedly installed on the top surface of the oxygen supply machine 2. The furnace body 3 is rotatably installed inside the installation groove 8 through a support shaft 10. An exhaust valve 4 and a molten steel drain pipe 11 are fixedly installed on the outer surface of the furnace body 3. The exhaust valve 4 is located above the molten steel drain pipe 11. An oxygen inlet pipe 9 is provided on one side of the outer wall of the furnace body 3. The oxygen inlet pipe 9 and the oxygen supply pipe 15 are connected to each other. A sealing groove is provided at one end of both the oxygen inlet pipe 9 and the oxygen supply pipe 15. A sealing component 13 for preventing oxygen leakage is provided in the sealing groove.

[0035] The inner side of the mounting slot 8 is equipped with a safety protection component 6 for protecting the molten steel from being discharged from the furnace body 3. The furnace base 1 is equipped with a lifting component 5 for opening and closing the top of the furnace body 3 and a conveying component 7 for continuously collecting and transporting molten steel.

[0036] The safety protection component 6 includes a threaded shaft 61, a safety protection motor 62, a moving block 63, a locking rack 64, and a sliding groove 65. The safety protection motor 62 is fixedly installed on one side of the outer wall of the furnace base 1. One end of the output shaft of the safety protection motor 62 is fixedly installed with the threaded shaft 61. One end of the threaded shaft 61 is fixedly connected to the outer surface of the furnace body 3. The threaded shaft 61 and the support shaft 10 are both located in the mounting bushing 14 set on the outer surface of the furnace body 3. The moving block 63 is installed on the external thread of the threaded shaft 61. The moving block 63 is slidably installed on the guide rail fixedly installed in the mounting groove 8 through the sliding groove 65 set at its bottom. Multiple locking racks 64 are fixedly installed on one side of the outer wall of the moving block 63. A bottom toothed roller 12 is fixedly installed on the bottom surface of the furnace body 3. The multiple locking racks 64 and the bottom toothed roller 12 are mutually adapted to each other.

[0037] The lifting assembly 5 includes a furnace cover 51, electrode rod holes 52, connecting brackets 53, a hydraulic cylinder 54, and a base 55. The base 55 is fixedly installed on the top surface of the furnace base 1. A hydraulic cylinder 54 is fixedly installed on the top surface of the base 55. Two connecting brackets 53 are fixedly installed on the top surface of the hydraulic cylinder 54. The furnace cover 51 is fixedly installed on the bottom surface of the two connecting brackets 53. The furnace cover 51 has multiple electrode rod holes 52 inside. The furnace cover 51 is located on the top of the furnace body 3.

[0038] This design enables the effective removal of molten steel after steelmaking. The amount of molten steel discharged can be controlled by adjusting the angle of the furnace body 3. The operation is simple, and the furnace body can be automatically locked and supported after being adjusted to the maximum tilt angle. This greatly ensures the stability of the furnace body at that angle, guarantees the molten steel discharge effect, and improves the overall safety of the equipment.

[0039] See attached document Figure 7 The sealing assembly 13 includes a magnetic suction shaft 131. Both the oxygen inlet pipe 9 and the oxygen supply pipe 15 have magnetic suction holes in their sealing grooves. The magnetic suction shaft 131 is attracted to the magnetic holes. A thermal expansion sealing ring 132 is fixedly installed at one end of the magnetic suction shaft 131. The thermal expansion sealing ring 132 is located inside the sealing groove, and the interior of the thermal expansion sealing ring 132 is filled with a number of thermal expansion particles.

[0040] See attached document Figure 3 The conveying assembly 7 includes a conveying ladder 71, a conveying roller 72, a conveying shell 73, and a receiving mold 74. The conveying ladder 71 is fixedly installed at one end of the conveying shell 73. Multiple conveying motors are fixedly installed inside the shell cavity of the conveying shell 73. A conveying roller 72 is fixedly installed at one end of the output shaft of each conveying motor. A receiving mold 74 is provided on each of the multiple conveying rollers 72. A pressure sensor is provided inside each of the multiple conveying rollers 72.

[0041] The working principle is as follows:

[0042] During steelmaking, the furnace cover 51 is moved upward by the hydraulic cylinder 54, at which point the furnace body 3 opens and the raw materials are introduced into the furnace body 3. The furnace cover 51 is then closed again. At this time, the electrodes on the outside are inserted into the furnace body 3 through the electrode rod holes 52. The electrodes discharge and generate a large amount of heat, causing the material in the furnace body 3 to melt to a liquid state at a high temperature. After melting, when the molten steel needs to be discharged, the furnace cover 51 is first raised to a certain height, and the safety protection motor 62 is directly activated, controlling the threaded shaft 61 to rotate. The threaded shaft 61 can drive the furnace body 3 to tilt. When the molten steel discharge pipe 11 is opened, the molten steel can be discharged automatically. The tilt angle of the entire furnace body 3 can be controlled according to the amount of molten steel to be discharged. During the above process, when the threaded shaft 61 rotates, it can also drive the moving block 63 to move sideways synchronously, and the locking rack 64 also moves sideways synchronously. When the furnace body 3 reaches the maximum tilt angle, the locking rack 64 can be inserted into the bottom toothed roller 12, thereby locking the position of the bottom toothed roller 12 and the furnace body 3. At the same time, it can also provide a certain support and protection force based on the tilted furnace body 3 to avoid safety accidents.

[0043] During the steelmaking process, the oxygen supply unit 2 can supply oxygen to the furnace body 3 through the oxygen supply pipe 15. The steelmaking process generates a large amount of heat that radiates outward. The thermal expansion sealing ring 132 expands in volume after being heated. After expansion, the tightness of the contact between the thermal expansion sealing rings 132 continuously increases. At this time, the sealing performance between the oxygen inlet pipe 9 and the oxygen supply pipe 15 is stably enhanced, which can effectively prevent oxygen leakage during the oxygen supply process, avoid waste of resources and safety accidents. The thermal expansion sealing ring 132 can also be quickly disassembled and replaced periodically.

[0044] After steelmaking, when molten steel is discharged, multiple conveyor rollers 72 can be opened to transport multiple receiving molds 74. When the receiving molds 74 move to the molten steel discharge pipe 11, they stop running and the molten steel can be injected into the receiving molds 74 for storage. When the weight in the receiving molds 74 reaches the standard, the transmission continues. This process is repeated to achieve continuous reception and transportation of molten steel. During the transportation process, it also helps the molten steel to cool and form in the receiving molds 74.

Claims

1. An electric arc heating steelmaking furnace with safety protection functions, characterized in that: It includes a furnace base (1), an oxygen supply machine (2), a furnace body (3), a lifting assembly (5), and a safety protection assembly (6). The furnace base (1) is provided with an installation groove (8) that matches the furnace body (3). The furnace body (3) is provided with an exhaust valve (4), an oxygen inlet pipe (9), a support shaft (10), a molten steel drain pipe (11), and a bottom toothed roller (12). The oxygen inlet pipe (9) is connected to the oxygen supply machine (2) through an oxygen supply pipe (15). The support shaft (10) is fixed on the side of the furnace body (3) and is rotatably connected to the furnace base (1). The bottom toothed roller (12) is fixed at the bottom of the furnace body (3). The lifting assembly (5) includes a furnace cover (51), electrode rod holes (52), a connecting frame (53), a hydraulic cylinder (54), and a base (55). The base (55) is fixed on the furnace base (1), and the hydraulic cylinder (54) is fixed on the base (55). The hydraulic cylinder (54) is driven to the furnace cover (51) through the connecting frame (53). The furnace cover (51) is provided with multiple electrode rod holes (52), and the furnace cover (51) covers the furnace body (3). The safety protection component (6) includes a threaded shaft (61), a safety protection motor (62), a moving block (63), a locking rack (64), and a slide groove (65). The output shaft of the safety protection motor (62) is connected to the threaded shaft (61). The threaded shaft (61) is fixed on the side of the furnace body (3). The threaded shaft (61) corresponds to the support shaft (10). The moving block (63) is threadedly connected to the threaded shaft (61). The moving block (63) is slidably installed in the mounting groove (8) through the slide groove (65) provided at its bottom. The moving block (63) is provided with multiple locking racks (64) that cooperate with the bottom toothed roller (12).

2. The electric arc heating steelmaking furnace with safety protection function according to claim 1, characterized in that: The exhaust valve (4) on the furnace body (3) is located at the upper part of the furnace body (3), and the molten steel drain pipe (11) is located at the lower part of the furnace body (3).

3. The electric arc heating steelmaking furnace with safety protection function according to claim 2, characterized in that: The furnace base (1) is provided with a conveying assembly (7) on one side of the molten steel pipe (11) located on the furnace body (3).

4. The electric arc heating steelmaking furnace with safety protection function according to claim 3, characterized in that: The conveying assembly (7) includes a conveying ladder (71), a conveying roller (72), a conveying shell (73), and a storage mold (74). The shell cavity of the conveying shell (73) is provided with multiple conveying rollers (72), each conveying roller (72) is driven by a conveying motor, and several storage molds (74) are respectively set on the conveying rollers (72). One end of the conveying shell (73) is provided with a conveying ladder (71) that is connected to the conveying rollers (72).

5. The electric arc heating steelmaking furnace with safety protection function according to claim 1, characterized in that: Both the oxygen inlet pipe (9) and the oxygen supply pipe (15) are provided with sealing grooves, and the sealing grooves are provided with sealing components (13) for preventing oxygen leakage.

6. The electric arc heating steelmaking furnace with safety protection function according to claim 5, characterized in that: The sealing assembly (13) includes a magnetic suction shaft (131) and a thermal expansion sealing ring (132). The oxygen inlet pipe (9) and the oxygen supply pipe (15) are provided with magnetic suction holes in their sealing grooves. The magnetic suction shaft (131) is attracted to the magnetic hole. The thermal expansion sealing ring (132) is fixed on the magnetic suction shaft (131) and is located in the sealing groove.

7. The electric arc heating steelmaking furnace with safety protection function according to claim 1, characterized in that: The mounting groove (8) is provided with a guide rail that cooperates with the sliding groove (65) at the bottom of the movable block (63).

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