A decarbonization furnace for steel production

Abstract

The invention discloses a decarburization furnace for steel production, belonging to the technical field of steel production equipment, comprising a furnace frame assembly, the annular bevel gear furnace frame assembly comprising a converter, a furnace cover is placed on the upper end of the annular bevel gear converter, a fixing plate is fixedly connected to the upper side wall of the annular bevel gear furnace cover, a first circular plate is fixedly connected between two annular bevel gear fixing plates, a centering assembly is fixedly connected inside the first circular plate of the annular bevel gear; the annular bevel gear centering assembly comprises two gas cylinders fixedly connected inside the first circular plate, gas plugs are slidably connected inside the annular bevel gear gas cylinders, connecting rods are fixedly connected to opposite side walls of the two annular bevel gear gas plugs, and a clamping gun assembly is fixedly connected to the opposite ends of the two annular bevel gear connecting rods; the device can effectively center the oxygen gun through the centering assembly, improve the oxygen blowing efficiency of the oxygen gun, and at the same time improve the stability of the oxygen gun when it is lifted and lowered, and avoid tilting and offset during the lifting and lowering of the oxygen gun.

Description

Technical Field

[0001] The invention relates to the technical field of steel production equipment, in particular to a decarburization furnace for steel production. Background Art

[0002] A decarburization furnace is a device used to remove carbon from steel during steel production and smelting. Its main purpose is to further oxidize the carbon in the molten steel by high-temperature heating, thereby reducing the carbon content of the steel to achieve the required steel composition requirements. The decarburization process usually occurs in the later stages of steelmaking, with the aim of improving the strength, toughness and other physical and chemical properties of the steel. A decarburization furnace is also called a converter, which is mainly used to convert pig iron into high-quality steel. Its working principle is to promote the chemical reaction of carbon and other impurities in the pig iron and remove these components by spraying high-pressure pure oxygen into the furnace. The structure of the converter is usually in the shape of an inverted cone and can be tilted to facilitate steel tapping and mixing of materials in the furnace. At the beginning of the steelmaking process, the converter is loaded with raw materials such as pig iron, scrap steel and limestone, and then oxygen is injected through a nozzle to react with the carbon in the pig iron to generate carbon dioxide and carbon monoxide gas, while removing impurities such as manganese and silicon. After a period of reaction, the required composition requirements are achieved, and the molten steel in the furnace can be discharged by tilting the furnace. Converter steelmaking is widely used in modern steel industry due to its large processing capacity, high production efficiency and low cost.

[0003] A Chinese patent discloses a high-efficiency and long-life injection method and system for a vanadium extraction-decarbonization dual converter (authorization announcement number CN109234490B). The patent includes: introducing vanadium extraction converter gas and decarbonization converter gas into an oxygen burner; obtaining a first purity CO2-N2 mixed gas from the vanadium extraction converter gas; obtaining a second purity CO2-N2 mixed gas from the decarbonization converter gas; obtaining an O2-CO2-N2 mixed gas from the decarbonization converter gas; obtaining a first purity CO2 gas from the second purity CO2-N2 mixed gas; the first purity CO2-N2 mixed gas is used for bottom blowing of the vanadium extraction converter, the second purity CO2-N2 mixed gas is used as a carrier gas for injecting iron ore powder into the vanadium extraction converter, and the O2-CO2-N2 mixed gas and the first purity CO2 gas are used for bottom blowing of the decarbonization converter and for injecting lime powder into the decarbonization converter bottom. The invention increases the vanadium oxidation rate of the vanadium extraction converter, improves the dephosphorization effect of the decarburization converter, and increases the service life of the vanadium extraction converter and the decarburization converter.

[0004] In the process of decarburizing steel, an oxygen lance needs to be inserted into the furnace to increase the temperature in the furnace so as to achieve the purpose of decarburizing molten steel. However, the movement of the existing oxygen lance needs to rely on a crane, which makes it difficult to accurately insert the oxygen lance into the furnace. In addition, during the oxygen blowing process, the waste slag adhered to the surface of the oxygen lance needs to rely on the rising force of the crane to be scraped off. When the waste slag adheres too firmly, it may cause the wire rope of the crane to break, causing a safety accident. For this reason, the applicant proposes a decarburization furnace for steel production. Summary of the invention

[0005] The object of the present invention is to provide a decarburization furnace for steel production to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A decarbonization furnace for steel production, comprising a furnace frame assembly, the furnace frame assembly comprising a converter, a furnace cover is placed on the upper end of the converter, a fixing plate is fixedly connected to the upper side wall of the furnace cover, a first round-shaped plate is fixedly connected between the two fixing plates, and a centering assembly is fixedly connected inside the first round-shaped plate;

[0008] The centering assembly includes two gas cylinders fixedly connected to the inside of the first circular plate, gas plugs are slidably connected to the inside of the gas cylinders, connecting rods are fixedly connected to the opposite side walls of the two gas plugs, and the clamping gun assembly is fixedly connected to the opposite ends of the two connecting rods;

[0009] The clamping gun assembly includes an L-shaped clamping plate and an L-shaped clamping frame which are respectively fixedly connected to the opposite ends of two connecting rods. The L-shaped clamping frame is provided with a sliding opening matching the L-shaped clamping plate. The upper ends of the L-shaped clamping frame and the sliding opening are rotatably connected to a slag-top assembly through two mounting plates. A driving assembly is fixedly connected to the rear side wall of the first circular plate. Two valve control assemblies which are connected to the driving assembly are fixedly connected inside the first circular plate. A slag scraping assembly is slidably connected between the two fixed plates.

[0010] As a further solution of the present invention, the centering assembly further comprises a bevel gear fixedly connected to the connecting rod, and an annular bevel tooth meshing with the bevel gear is rotatably connected inside the first circular plate.

[0011] As a further solution of the present invention, the driving assembly includes a pressure cylinder fixedly connected to the rear side wall of the first circular plate, a movable plug is slidably connected inside the pressure cylinder, a threaded sleeve is fixedly connected to the side wall of the movable plug, an end of the pressure cylinder away from the first circular plate is fixedly connected to a motor, an output end of the motor is fixedly connected to a threaded rod threadedly connected to the threaded sleeve, a limiting disk is fixedly connected inside the pressure cylinder, and the threaded sleeve passes through the limiting disk.

[0012] As a further solution of the present invention, the valve channel control component includes a valve housing fixedly connected to the inside of the first circular plate, a connecting pipe is connected between the valve housing and the pressure cylinder, and a short pipe is connected between the valve housing and the gas cylinder.

[0013] As a further solution of the present invention, a valve core is rotatably connected to the inside of the valve housing, a T-shaped valve channel is drilled inside the valve core, a square tube plug is slidably connected to the lower end of the valve core, a fixed column is fixedly connected to the lower inner wall of the valve housing, a spiral groove is drilled on the inner wall of the square tube plug, and a guide column fixedly connected to the fixed column is slidably connected to the inside of the spiral groove.

[0014] As a further solution of the present invention, the scraper assembly includes a second circular plate slidably connected between two fixed plates, two vertical cylinders are fixedly connected to the upper wall of the second circular plate, an oil pipe is connected to the side wall of the valve housing away from the short tube, a sealing plug is slidably connected inside the vertical cylinder, and the oil pipe passes through the sealing plug.

[0015] As a further solution of the present invention, an oil cylinder is fixedly connected inside the second circular plate, an oil plug is slidably connected inside the oil cylinder, a top pipe is connected to the oil plug, two pneumatic plugs are slidably connected inside the oil plug, and a scraper plate is fixedly connected to the end of the top pipe away from the oil cylinder.

[0016] As a further solution of the present invention, the top pipe is connected with an insert tube, a push plug is slidably connected inside the insert tube, a spring ring block is fixedly connected inside the insert tube, and a return spring is fixedly connected between the push plug and the spring ring block.

[0017] As a further solution of the present invention, the scraper assembly also includes a mounting cylinder fixedly connected to the connecting rod, a sliding sleeve located inside the mounting cylinder is slidably connected to the connecting rod, a thrust spring is fixedly connected between the sliding sleeve and the mounting cylinder, and a shift rod that resists the push plug is fixedly connected between the sliding sleeve and the push plug.

[0018] As a further solution of the present invention, the slag-top assembly includes a special-shaped barrel rotatably connected to two mounting plates, and a plurality of inserts are fixedly connected to the special-shaped barrel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the present invention is used, the centering component can effectively center the oxygen lance, thereby improving the oxygen blowing efficiency of the oxygen lance. At the same time, the stability of the oxygen lance during lifting can be improved, thereby avoiding tilting and deviation during the lifting process of the oxygen lance.

[0021] 2. When the present invention is used, the valve control assembly and the slag scraping assembly can play a buffering role in the lifting equipment of the oxygen lance when the slag is difficult to scrape off during the slag scraping process of the oxygen lance, thereby effectively avoiding damage to the lifting equipment.

[0022] 3. When the present invention is used, when the slag is difficult to scrape off, the slag top assembly can be used to continuously rotate and impact the slag to loosen the slag, which is more conducive to the shedding of the slag on the surface of the oxygen lance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional image of a decarburization furnace used in steel production;

[0024] Figure 2 This is a schematic diagram of the structure of a furnace cover part in a decarburization furnace for steel production;

[0025] Figure 3 It is a structural schematic diagram of the first circular plate part in a decarburization furnace for steel production;

[0026] Figure 4 It is a structural schematic diagram of a centering component in a decarburization furnace for steel production;

[0027] Figure 5 This is a schematic diagram of the structure of a gun clamping assembly in a decarburization furnace for steel production;

[0028] Figure 6 This is a schematic diagram of the structure of a driving component in a decarburization furnace for steel production;

[0029] Figure 7 This is a schematic diagram of the structure of a valve channel control component in a decarburization furnace for steel production;

[0030] Figure 8 This is a schematic diagram of the structure of a slag scraping assembly in a decarburization furnace for steel production;

[0031] Fig. 9 This is a schematic diagram of the structure of the oil drum part of a decarburization furnace used in steel production;

[0032] Fig.10 This is a schematic diagram of the structure of the top slag assembly in a decarburization furnace used in steel production.

[0033] In the figure:

[0034] 1. Furnace frame assembly; 101. Converter; 102. Furnace cover; 103. Fixing plate; 104. First circular plate;

[0035] 2. Centering assembly; 201. Air cylinder; 202. Air plug; 203. Connecting rod; 204. Bevel gear; 205. Annular bevel gear;

[0036] 3. Clamp gun assembly; 301. L-shaped clamping plate; 302. L-shaped clamping frame; 303. Sliding mouth; 304. Mounting plate;

[0037] 4. Top slag assembly; 401. Special-shaped cylinder; 402. Insert;

[0038] 5. Driving assembly; 501. Pressure cylinder; 502. Moving plug; 503. Threaded sleeve; 504. Motor; 505. Threaded rod; 506. Limiting plate;

[0039] 6. Valve channel control assembly; 601. Valve housing; 602. Connecting pipe; 603. Short pipe; 604. Valve core; 605. T-shaped valve channel; 606. Square plug; 607. Fixed column; 608. Spiral groove; 609. Guide column;

[0040] 7. Slag scraping assembly; 701. Second circular plate; 702. Vertical cylinder; 703. Oil pipe; 704. Sealing plug; 705. Oil cylinder; 706. Oil plug; 707. Top pipe; 708. Pneumatic plug; 709. Slag scraping plate; 710. Insert cylinder; 711. Push plug; 712. Spring ring block; 713. Return spring; 714. Mounting cylinder; 715. Sliding sleeve; 716. Thrust spring; 717. Shift rod. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1: Please refer to Figures 1 to 4 In an embodiment of the present invention, a decarburization furnace for steel production includes a furnace frame assembly 1, the furnace frame assembly 1 includes a converter 101, a furnace cover 102 is placed on the upper end of the converter 101, the furnace cover 102 and the upper device are hoisted to the upper end of the converter 101 by a crane after molten steel is poured, an oxygen blowing port for inserting an oxygen gun is cut on the furnace cover 102, a fixing plate 103 is fixedly connected to the upper side wall of the furnace cover 102, a first round plate 104 is fixedly connected between the two fixing plates 103, and a centering assembly 2 for quickly centering the oxygen gun is fixedly connected inside the first round plate 104;

[0043] The centering assembly 2 includes two gas cylinders 201 fixedly connected to the inside of the first circular plate 104 by means of embedding, and the gas plugs 202 are slidably connected to the inside of the gas cylinders 201. The two gas plugs 202 are fixedly connected to the opposite side walls with connecting rods 203, and the connecting rods 203 are arranged through the first circular plate 104. The two connecting rods 203 are fixedly connected to the opposite ends with the clamping gun assembly 3 for clamping the oxygen gun;

[0044] The clamp gun assembly 3 includes an L-shaped clamp plate 301 and an L-shaped clamp frame 302 respectively fixedly connected to the opposite ends of the two connecting rods 203. The height of the L-shaped clamp frame 302 is greater than that of the L-shaped clamp plate 301. A sliding opening 303 matching the L-shaped clamp plate 301 is cut on the L-shaped clamp frame 302. The upper ends of the L-shaped clamp frame 302 and the sliding opening 303 are rotatably connected to the top slag assembly 4 through two mounting plates 304. The upper side wall of the L-shaped clamp plate 301 is fixedly connected to two mounting plates 304. The top slag assembly 4 is rotatably connected between the two mounting plates 304. The rear side wall of the first round plate 104 is fixedly connected to a The driving assembly 5 of the middle assembly 2 and the scraping assembly 7, the first circular plate 104 is internally fixedly connected with two valve control assemblies 6 which are connected with the pressure cylinder 501 in the driving assembly 5 through the connecting pipe 602, and the scraping assembly 7 is slidably connected between the two fixed plates 103. When oil pressure is generated inside the gas cylinder 201, the pressure will drive the gas plug 202 to move, so that the gas plug 202 pushes the connecting rod 203 to move, and then the L-shaped clamping frame 302 and the sliding mouth 303 are close to each other, and the L-shaped clamping frame 302 and the sliding mouth 303 can narrow the range, and push the oxygen gun to gradually center until the top slag assembly 4 clamps the oxygen gun.

[0045] The centering component 2 also includes a bevel gear 204 fixedly connected to the connecting rod 203, and an annular bevel tooth 205 meshing with the bevel gear 204 is rotatably connected inside the first circular plate 104. An annular cavity matching the annular bevel tooth 205 is excavated inside the first circular plate 104, and the bevel gear 204 is rotatably connected to the inside of the annular cavity of the first circular plate 104 by means of a slide groove clamping. During the movement of the connecting rod 203, the threaded action of the connecting rod 203 and the bevel gear 204 will drive the bevel gear 204 to move, and the bevel gear 204 will drive the annular bevel tooth 205 to move. Through the movement of the annular bevel tooth 205, the two bevel gears 204 can rotate synchronously, thereby enabling the L-shaped clamp frame 302 and the slide 303 to move synchronously.

[0046] The driving assembly 5 includes a pressure cylinder 501 fixedly connected to the rear side wall of the first circular plate 104, the pressure cylinder 501 is filled with hydraulic oil, the pressure cylinder 501 is slidably connected to a moving plug 502, and a pressure sensor electrically connected to the motor 504 is installed inside the moving plug 502. When the oxygen gun is in the process of rising, the scraper plate 709 has difficulty in scraping off the slag on the surface of the oxygen gun, and the vertical cylinder 702 will generate a huge upward force. This force will directly cause the pressure inside the pressure cylinder 501 to increase, which will be detected by the pressure sensor. At this time, the pressure sensor sends a signal to the microcomputer, and the microcomputer controls the motor 504 to start, so that the threaded rod 505 is reversed, and the moving plug 502 is pulled to move, so that the vertical cylinder 702 and the second circular plate 701 move upward together, which has a buffering effect on the lifting of the oxygen gun and avoids damage to the oxygen gun lifting device. A threaded sleeve 503 is fixedly connected to the wall, and a threaded groove is bored on the inner wall of the threaded sleeve 503, and the threaded groove of the threaded sleeve 503 matches the threaded rod 505. A motor 504 is fixedly connected to the end of the pressure cylinder 501 away from the first circular plate 104, and a threaded rod 505 threadedly connected to the threaded sleeve 503 is fixedly connected to the output end of the motor 504. A limiting disk 506 is fixedly connected to the inside of the pressure cylinder 501, and the threaded sleeve 503 penetrates the limiting disk 506. The threaded sleeve 503 is a square structure, and the limiting disk 506 can effectively prevent the threaded sleeve 503 from rotating. When the motor 504 is started, the motor 504 drives the threaded rod 505 to rotate. When the threaded rod 505 rotates, the threaded sleeve 503 can be driven to move by the action of the thread, and the threaded sleeve 503 drives the movable plug 502 to move, so that the hydraulic oil inside the pressure cylinder 501 is injected into the valve channel control component 6.

[0047] The valve channel control component 6 includes a valve housing 601 fixedly connected to the inside of the first circular plate 104, an installation cavity matching the valve housing 601 is bored inside the first circular plate 104, and the valve housing 601 is fixedly connected to the inside of the installation cavity of the first circular plate 104 by welding, a connecting pipe 602 is connected and fixedly connected between the valve housing 601 and the pressure cylinder 501, and a short pipe 603 is connected and fixedly connected between the valve housing 601 and the air cylinder 201, when hydraulic pressure is injected into the valve core 604 through the connecting pipe 602, in the initial state, the T-valve channel 605 is connected with the air cylinder 201, so that the hydraulic pressure first flows into the air cylinder 201, driving the air plug 202 to move.

[0048] The valve core 604 is rotatably connected inside the valve housing 601, and the valve core 604 is rotatably connected through the cooperation of the fixed column 607 and the square barrel plug 606. A T-shaped valve channel 605 is excavated inside the valve core 604, and a square barrel plug 606 is slidably connected to the lower end of the valve core 604. A square sliding cavity matching the square barrel plug 606 is excavated at the lower end of the valve core 604, and the square barrel plug 606 is slidably connected inside the square sliding cavity at the lower end of the valve core 604. A fixed column 607 is fixedly connected to the inner wall of the lower side of the valve housing 601, and a spiral groove 608 is excavated on the inner wall of the square barrel plug 606. The spiral groove 608 is slidably connected to the inner wall of the square barrel plug 606. The fixing column 607 is fixedly connected to the guide column 609. When the gun clamping assembly 3 is against the oxygen gun, the gas plug 202 cannot move. At this time, pressure is generated inside the valve core 604, thereby pushing the square tube plug 606 to move downward. When the square tube plug 606 moves downward, the square tube plug 606 will rotate under the guidance of the spiral groove 608 and the guide column 609. Since the square tube plug 606 is square, the square tube plug 606 will drive the valve core 604 to rotate together. According to the number of turns of the spiral groove 608, the valve core 604 can be rotated 180 degrees, thereby connecting the T-valve channel 605 with the oil pipe 703.

[0049] The scraper assembly 7 includes a second circular plate 701 slidably connected between the two fixed plates 103, and the left and right side walls of the second circular plate 701 are slidably connected to the opposite side walls of the two fixed plates 103 by means of sliding grooves. Two vertical cylinders 702 are fixedly connected to the upper side wall of the second circular plate 701, and an oil pipe 703 is connected and fixedly connected to the side wall of the valve housing 601 away from the short tube 603. A sealing plug 704 is slidably connected inside the vertical cylinder 702, and the oil pipe 703 penetrates the sealing plug 704. When the T-valve 605 is connected to the oil pipe 703, the hydraulic oil flows into the vertical cylinder 702 through the oil pipe 703, so that the vertical cylinder 702 moves downward under pressure, thereby driving the second circular plate 701 to move downward.

[0050] An oil cylinder 705 is fixedly connected inside the second circular plate 701, an oil plug 706 is slidably connected inside the oil cylinder 705, a top pipe 707 is connected and fixedly connected to the oil plug 706, two pneumatic plugs 708 are slidably connected inside the oil plug 706, and a scraper plate 709 is fixedly connected to the end of the top pipe 707 away from the oil cylinder 705.

[0051] The top tube 707 is connected and fixedly connected with an insert cylinder 710, and a push plug 711 is slidably connected inside the insert cylinder 710. A spring ring block 712 is fixedly connected inside the insert cylinder 710, and a return spring 713 is fixedly connected between the push plug 711 and the spring ring block 712. When the second circular plate 701 is in the initial position, the shift rod 717 presses the push plug 711, so that the push plug 711 will generate positive pressure inside the top tube 707, and then it can push the pneumatic plug 708 to move, so that the space on the left and right sides of the oil cylinder 705 located on the oil plug 706 is in a connected state. At this time, the oil plug 706 can move, and when the two connecting rods 203 move, the installation cylinder 714 and the thrust will be used. The spring 716 drives the sliding sleeve 715 to move, and the sliding sleeve 715 drives the shift rod 717 to move. The shift rod 717 drives the top pipe 707 to move through the insert sleeve 710, so that when the L-shaped clamping frame 302 and the sliding mouth 303 clamp the oxygen gun, the two scraper plates 709 can also clamp the lower end of the oxygen gun. After the second circular plate 701 moves down, the push plug 711 is reset under the action of the reset spring 713. At this time, the pneumatic plug 708 is reset. At this time, the space on both sides of the oil cylinder 705 located at the oil plug 706 is no longer connected due to the pneumatic plug 708. At this time, the oil plug 706 cannot move. Therefore, when the oxygen gun rises, the scraper plate 709 can scrape the oxygen gun.

[0052] Example 2: Please refer to Figures 4 to 10 , combined with the basis of Example 1,

[0053] The scraper assembly 7 also includes a mounting cylinder 714 fixedly connected to the connecting rod 203, and a sleeve 715 located inside the mounting cylinder 714 is slidably connected to the connecting rod 203. A thrust spring 716 is fixedly connected between the sleeve 715 and the mounting cylinder 714, and a shift rod 717 that abuts against the push plug 711 is fixedly connected between the sleeve 715 and the push plug 711. When the second circular plate 701 is at the top due to buffering, the insert cylinder 710 presses the push plug 711 again, and the oil plug 706 can be moved at this time. If the slag on the surface of the oxygen lance is still difficult to remove, as the oxygen lance continues to move upward, the slag on the surface of the oxygen lance pushes the scraper plate 709 to move to both sides. When the scraper plate 709 moves, it drives the sleeve 715 to move through the insert cylinder 710 and the shift rod 717, and the thrust spring 716 is in a compressed state.

[0054] The top slag assembly 4 includes a special-shaped cylinder 401 rotatably connected to two mounting plates 304, and a plurality of inserts 402 are fixedly connected to the special-shaped cylinder 401. At this time, the top slag assembly 4 rotates due to the thrust of the slag. During the rotation of the special-shaped cylinder 401, the inserts 402 will continuously cut the slag, making it easier for the slag on the surface of the oxygen gun to fall off.

[0055] The working principle of the present invention is:

[0056] When the molten steel in the converter 101 needs to be decarburized, the staff first starts the crane, and hoists the oxygen lance within the range between the L-shaped clamp frame 302 and the sliding port 303 through the crane, and then starts the motor 504. The motor 504 drives the threaded rod 505 to rotate. When the threaded rod 505 rotates, it can drive the threaded sleeve 503 to move through the action of the thread, and the threaded sleeve 503 drives the moving plug 502 to move, and the hydraulic oil inside the pressure cylinder 501 is injected into the valve channel control component 6. When oil pressure is generated inside the gas cylinder 201, the pressure drives the gas plug 202 to move, so that the gas plug 202 pushes the connecting rod 203 to move, and then the L-shaped clamp frame 302 and the sliding port 303 are close to each other, and the L-shaped clamp frame 302 and the sliding port 303 can be reduced in range, and the oxygen lance is gradually pushed to the center until the top slag component 4 clamps the oxygen lance;

[0057] In the initial state, the oil plug 706 is in a movable state. When the two connecting rods 203 move, the sliding sleeve 715 is driven to move through the installation cylinder 714 and the thrust spring 716. The sliding sleeve 715 drives the shift rod 717 to move. The shift rod 717 drives the top pipe 707 to move through the insert cylinder 710. When the L-shaped clamp frame 302 and the sliding mouth 303 clamp the oxygen gun, the two scraper plates 709 can also clamp the lower end of the oxygen gun. At this time, the oxygen gun is in an upright state. After the L-shaped clamp frame 302 and the sliding mouth 303 clamp the oxygen gun, the gas plug 202 cannot move further. At this time, the valve core 604 generates pressure due to the continued movement of the movable plug 502, thereby pushing the square plug 606 to move downward. When the square plug 606 moves downward, the square plug 606 will rotate under the guidance of the spiral groove 608 and the guide column 609. Since the square plug 606 is square, the square plug 606 will drive the valve core 604 to rotate together. According to the number of turns of the spiral groove 608, the valve core 604 can be rotated 180 degrees, thereby connecting the T-valve channel 605 with the oil pipe 703.

[0058] At this time, the hydraulic oil flows into the vertical cylinder 702 through the oil pipe 703, so that the vertical cylinder 702 moves downward under pressure, thereby driving the second circular plate 701 to move downward, so that the scraper plate 709 clamps the lower end of the oxygen lance and moves downward with the oxygen lance, ensuring that the oxygen lance can be inserted into the oxygen injection port of the furnace cover 102 and enter the converter 101. After the oxygen lance enters the converter 101, the molten steel can be blown for oxygen decarburization. During the oxygen blowing process of the oxygen lance, the molten steel quickly heats up and boils, causing part of the molten steel to splash onto the surface of the oxygen lance to form slag. At this time, the staff pulls the oxygen lance through the crane and uses the scraper plate 709 to scrape the slag on the surface of the oxygen lance;

[0059] When the oxygen lance is in the process of rising and the scraper plate 709 has difficulty in scraping off the slag on the surface of the oxygen lance, the vertical cylinder 702 will generate a huge upward force, which will directly increase the pressure inside the pressure cylinder 501 and then be detected by the pressure sensor. At this time, the pressure sensor sends a signal to the microcomputer, and the microcomputer controls the motor 504 to start, so that the threaded rod 505 reverses and pulls the moving plug 502 to move, so that the vertical cylinder 702 and the second circular plate 701 move upward together. At the same time, the microcomputer can adjust the rotation speed of the threaded rod 505 in real time according to the pressure. The greater the pressure, the faster the rotation speed of the threaded rod 505, and the upward movement speed of the second circular plate 701 will also be faster, so as to play a buffering role in the lifting of the oxygen lance and avoid damage to the oxygen lance lifting device.

[0060] When the second circular plate 701 is at the top due to buffering, the insert 710 presses the push plug 711 again, and the oil plug 706 can be moved. At this time, the steel slag on the surface of the oxygen lance is still difficult to remove. As the oxygen lance continues to move upward, the steel slag on the surface of the oxygen lance pushes the scraper plate 709 to move to both sides to prevent the oxygen lance from being unable to move upward due to the adhesion of the steel slag. When the scraper plate 709 moves, it drives the sliding sleeve 715 to move through the insert 710 and the shift rod 717. At this time, the thrust spring 716 is in a compressed state. At this time, the top slag component 4 will rotate due to the thrust of the steel slag. During the rotation of the special-shaped cylinder 401, the insert 402 will continuously cut the steel slag, making the steel slag on the surface of the oxygen lance easier to fall off;

[0061] Then the staff lowered the oxygen lance again by the crane. When the oxygen lance was fully inserted into the converter 101, the scraper plate 709 was no longer in contact with the slag. Therefore, under the action of the thrust spring 716, the insert cylinder 710 was driven to move and reset through the shift rod 717. The motor 504 was reversed again, driving the shift plug 502 to discharge the hydraulic oil in the pressure cylinder 501 into the vertical cylinder 702 again, so that the second circular plate 701 moved down again. When the oxygen lance rose for the second time, the slag on the surface of the oxygen lance continued to be scraped off.

[0062] When the work is finished and the L-shaped clamp frame 302, the sliding mouth 303 and the second circular plate 701 need to be reset, the staff only needs to start the reversing program of the motor 504, so that the movable plug 502 moves to generate negative pressure, and the hydraulic oil inside the vertical cylinder 702 flows into the pressure cylinder 501 through the valve core 604, and the vertical cylinder 702 will drive the second circular plate 701 to move up and reset. As the movable plug 502 continues to move, after the vertical cylinder 702 is completely pumped, the negative pressure inside the T-valve channel 605 increases, and then the square cylinder plug 606 is sucked up under the action of negative pressure, thereby driving the valve core 604 to rotate, so that the T-valve channel 605 is connected with the air cylinder 201 through the short tube 603. At this time, the driving component 5 draws the hydraulic oil inside the air cylinder 201 to reset the air plug 202, and the air plug 202 pulls the L-shaped clamp frame 302 and the sliding mouth 303 to reset.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A decarbonization furnace for steel production, comprising a furnace frame assembly (1), characterized in that: The furnace frame assembly (1) comprises a converter (101), a furnace cover (102) is placed on the upper end of the converter (101), a fixing plate (103) is fixedly connected to the upper side wall of the furnace cover (102), a first circular plate (104) is fixedly connected between the two fixing plates (103), and a centering assembly (2) is fixedly connected inside the first circular plate (104); The centering assembly (2) comprises two gas cylinders (201) fixedly connected to the inside of the first circular plate (104), the gas cylinders (201) are slidably connected to gas plugs (202), the opposite side walls of the two gas plugs (202) are fixedly connected to connecting rods (203), and the opposite ends of the two connecting rods (203) are fixedly connected to the clamping gun assembly (3); The clamping gun assembly (3) comprises an L-shaped clamping plate (301) and an L-shaped clamping frame (302) respectively fixedly connected to opposite ends of two connecting rods (203); a sliding opening (303) matching the L-shaped clamping plate (301) is cut on the L-shaped clamping frame (302); the upper ends of the L-shaped clamping frame (302) and the sliding opening (303) are rotatably connected to a slag-lifting assembly (4) via two mounting plates (304); a driving assembly (5) is fixedly connected to the rear side wall of the first circular plate (104); two valve channel control assemblies (6) in communication with the driving assembly (5) are fixedly connected inside the first circular plate (104); and a slag scraping assembly (7) is slidably connected between the two fixed plates (103).

2. A decarburization furnace for steel production according to claim 1, characterized in that: The centering assembly (2) further comprises a bevel gear (204) fixedly connected to the connecting rod (203), and an annular bevel gear (205) meshing with the bevel gear (204) is rotatably connected inside the first circular plate (104).

3. A decarburization furnace for steel production according to claim 1, characterized in that: The driving assembly (5) comprises a pressure cylinder (501) fixedly connected to the rear side wall of the first circular plate (104); a movable plug (502) is slidably connected inside the pressure cylinder (501); a threaded sleeve (503) is fixedly connected to the side wall of the movable plug (502); an end of the pressure cylinder (501) away from the first circular plate (104) is fixedly connected to a motor (504); an output end of the motor (504) is fixedly connected to a threaded rod (505) threadedly connected to the threaded sleeve (503); a limiting disk (506) is fixedly connected inside the pressure cylinder (501), and the threaded sleeve (503) passes through the limiting disk (506).

4. A decarburization furnace for steel production according to claim 3, characterized in that: The valve channel control assembly (6) comprises a valve housing (601) fixedly connected to the interior of the first circular plate (104), a connecting pipe (602) communicating between the valve housing (601) and the pressure cylinder (501), and a short pipe (603) communicating between the valve housing (601) and the gas cylinder (201).

5. A decarburization furnace for steel production according to claim 4, characterized in that: A valve core (604) is rotatably connected to the interior of the valve housing (601), a T-shaped valve channel (605) is bored inside the valve core (604), a square tube plug (606) is slidably connected to the lower end of the valve core (604), a fixing column (607) is fixedly connected to the lower inner wall of the valve housing (601), a spiral groove (608) is bored on the inner wall of the square tube plug (606), and a guide column (609) fixedly connected to the fixing column (607) is slidably connected to the interior of the spiral groove (608).

6. A decarburization furnace for steel production according to claim 5, characterized in that: The scraper assembly (7) comprises a second circular plate (701) slidably connected between two fixed plates (103); two vertical cylinders (702) are fixedly connected to the upper side wall of the second circular plate (701); an oil pipe (703) is connected to the side wall of the valve housing (601) away from the short tube (603); a sealing plug (704) is slidably connected inside the vertical cylinder (702), and the oil pipe (703) passes through the sealing plug (704).

7. A decarburization furnace for steel production according to claim 6, characterized in that: An oil cylinder (705) is fixedly connected inside the second circular plate (701), an oil plug (706) is slidably connected inside the oil cylinder (705), a top pipe (707) is connected to the oil plug (706), two pneumatic plugs (708) are slidably connected inside the oil plug (706), and a scraper plate (709) is fixedly connected to one end of the top pipe (707) away from the oil cylinder (705).

8. A decarburization furnace for steel production according to claim 7, characterized in that: The top tube (707) is connected to an insert tube (710), a push plug (711) is slidably connected inside the insert tube (710), a spring ring block (712) is fixedly connected inside the insert tube (710), and a return spring (713) is fixedly connected between the push plug (711) and the spring ring block (712).

9. A decarburization furnace for steel production according to claim 8, characterized in that: The scraper assembly (7) further comprises a mounting cylinder (714) fixedly connected to the connecting rod (203); a sliding sleeve (715) located inside the mounting cylinder (714) is slidably connected to the connecting rod (203); a thrust spring (716) is fixedly connected between the sliding sleeve (715) and the mounting cylinder (714); and a shift rod (717) abutting against the push plug (711) is fixedly connected between the sliding sleeve (715) and the push plug (711).

10. A decarburization furnace for steel production according to claim 8, characterized in that: The slag-removing assembly (4) comprises a special-shaped cylinder (401) rotatably connected to two mounting plates (304), and a plurality of inserts (402) are fixedly connected to the special-shaped cylinder (401).

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