Converter oxygen top-blowing spray gun dustproof energy-saving device convenient to replace

Abstract

The invention discloses a converter oxygen top-blowing spray gun dustproof energy-saving device convenient to replace, and relates to the technical field of converter oxygen top-blowing spray guns. The converter oxygen top-blowing spray gun dustproof energy-saving device convenient to replace comprises a spray gun water jacket opening formed in the side wall of a converter top-blowing conical spray gun. According to the converter oxygen top-blowing spray gun dustproof energy-saving device convenient to replace, a closed space with the variable length can be formed above a spray gun water jacket opening, when the converter top-blowing conical spray gun works, flue gas flows into the closed space through an inner hole gap of the cone device, when the pressure in the space is the same as that of the spray gun water jacket opening, the flue gas stops flowing, and the converter oxygen top-blowing spray gun is replaced. When quick-wear parts such as a sealing part and a telescopic sleeve need to be replaced, the cone device and the telescopic sleeve can be easily detached from the converter top-blowing cone-shaped spray gun to be replaced, and the problem that in the blowing process of an oxygen top-blowing converter, the converter top-blowing cone-shaped spray gun can not be disassembled is solved on the premise that the converter top-blowing cone-shaped spray gun is not disassembled. And smoke overflows from a water jacket opening of the spray gun, so that a large amount of nitrogen or compressed air is consumed.

Description

Technical Field

[0001] This invention relates to the field of converter oxygen top-blowing lance technology, specifically a dustproof and energy-saving device for converter oxygen top-blowing lances that is easy to replace. Background Technology

[0002] During the blowing process of an oxygen top-blown converter, some flue gas overflows from the water jacket inlet of the spray gun. There are two main methods to prevent this: one is to install a nitrogen sealing ring or nitrogen sealing collar at the water jacket inlet of the spray gun and inject nitrogen or compressed air into the water jacket inlet to block the flue gas from overflowing. This method requires a large amount of nitrogen or compressed air. The other method is to use a top-blown cone spray gun with a built-in seal to prevent flue gas from overflowing, but the spray gun needs to be disassembled when the seal is replaced. Summary of the Invention

[0003] The purpose of this invention is to provide a dustproof and energy-saving device for converter oxygen top-blowing nozzles that is easy to replace, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a dustproof and energy-saving device for a converter oxygen top-blown spray lance that is easy to replace, comprising a spray lance water jacket inlet disposed on the side wall of the converter top-blown conical spray lance, wherein a nitrogen sealing ring is disposed inside the spray lance water jacket inlet, and a conical device is disposed inside the nitrogen sealing ring, and there is a seal between the conical device and the nitrogen sealing ring; a split cover is fixedly fitted on the side wall of the converter top-blown conical spray lance, and a hanging plate is fixedly connected to the split cover; a positioning ring is fixedly fitted on the side wall of the converter top-blown conical spray lance, and the positioning ring is used to restrict the downward movement of the split cover on the converter top-blown conical spray lance; the conical device... Multiple chains are detachably connected between the body device and the hanging plate, and hooks are provided at both ends of the chains. The side wall of the converter top-blown cone-shaped spray gun is fitted with a telescopic sleeve, and the two ends of the telescopic sleeve are respectively fixed to the cone device and the split cover by pressure plates. A split flange is provided in the inner hole of the cone device, and a split smoke baffle is used inside the cone device. A rotating plate is rotatably connected to the side wall of the hook through a rotating shaft, and a limiting mechanism for limiting the rotating shaft is provided on the side wall of the hook. A reset mechanism for resetting the rotating shaft is provided on the side wall of the hook, and a gas pressure regulating mechanism is provided on the top of the pressure plate.

[0005] Preferably, the limiting mechanism includes multiple rectangular blocks fixedly connected to the side wall of the rotating shaft, and a fixing plate is fixedly connected to the side wall of the hook. A mounting cover is fixedly connected to the top of the fixing plate, and a sliding plate is connected inside the mounting cover via a telescopic mechanism. Multiple triangular blocks are fixedly connected to the side wall of the sliding plate, and the side wall of the triangular blocks is provided with an inclined surface and a limiting surface. The movement of the sliding plate is driven by a pushing mechanism.

[0006] Preferably, the telescopic mechanism includes two symmetrically arranged first sleeves fixedly connected to the inner sidewall of the mounting cover, and a first sleeve rod is inserted into each first sleeve. The other end of the first sleeve rod is fixed to the sidewall of the sliding plate, and a return spring is sleeved on the sidewall of each first sleeve.

[0007] Preferably, the pushing mechanism includes a groove formed on the top of the mounting cover, and a pushing block is slidably connected in the groove, the pushing block being fixed to the top of the sliding plate.

[0008] Preferably, the reset mechanism includes a gear fixedly sleeved on the side wall of the rotating shaft, and the side wall of the hook is connected to a rack through a reset assembly, wherein the rack is meshed with the gear.

[0009] Preferably, the reset assembly includes a support plate fixedly connected to the side wall of the hook, and two connecting blocks are fixedly connected to the side wall of the support plate. Two guide rods are fixedly connected to the opposite side walls of the two connecting blocks, and a slider is sleeved on the side wall of each guide rod. The slider is fixed to the side wall of the rack, and a first spring is sleeved on the side wall of each guide rod.

[0010] Preferably, the air pressure regulating mechanism includes an exhaust pipe fixedly inserted into the top of the pressure plate, and the lower end of the exhaust pipe is connected to the telescopic sleeve. A conical sleeve is fixedly inserted into the exhaust pipe, and a hollow disk is connected to the exhaust pipe through a lifting mechanism. A sealing ball is connected to the bottom of the hollow disk through a telescopic component, and the sealing ball abuts against the inner wall of the conical sleeve.

[0011] Preferably, the lifting mechanism includes a first support block and a second support block fixedly connected to the inner wall of the exhaust pipe, and a second sleeve rod is fixedly connected to the bottom of the first support block. A second sleeve is sleeved on the side wall of the second sleeve rod, and the lower end of the second sleeve is fixed to the top of the hollowed-out disk. A threaded rod is rotatably connected to the bottom of the second support block, and a threaded tube is threadedly connected to the side wall of the threaded rod. The lower end of the threaded tube is fixed to the top of the hollowed-out disk, and a rocker wheel is fixedly connected to the upper end of the threaded rod.

[0012] Preferably, the telescopic component includes a second spring fixedly connected to the bottom of the hollowed-out disc, and the lower end of the second spring is fixed to the sealing ball.

[0013] Preferably, the inner wall of the exhaust pipe is provided with scale markings.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) This easy-to-replace converter oxygen top-blown spray gun dust prevention and energy-saving device, by setting up a telescopic sleeve, etc., uses a nitrogen sealing ring, cone device, telescopic sleeve, split cover, converter top-blown cone spray gun to form a sealed space with variable length above the water jacket inlet of the spray gun. When the converter top-blown cone spray gun is working, the flue gas flows into this sealed space through the gap in the inner hole of the cone device. When the pressure in the space is the same as the water jacket inlet of the spray gun, the flue gas stops flowing in. The pressure of the sealed space is adjusted by the air pressure regulating mechanism. When it is necessary to replace the seals and telescopic sleeves and other vulnerable parts, the chain is untied, the pressure plate, split flange and split smoke baffle are removed, and the cone device and telescopic sleeve can be easily removed from the converter top-blown cone spray gun for replacement. Without disassembling the converter top-blown cone spray gun, it solves the problem of flue gas overflowing from the water jacket inlet of the spray gun and consuming a large amount of nitrogen or compressed air during the blowing process of the oxygen top-blown converter.

[0016] (2) This easy-to-replace converter oxygen top-blown nozzle dustproof and energy-saving device, through the setting of a reset mechanism and a limit mechanism, requires the hook at the end of the chain to be hung in the hanging hole of the hanging plate during use. Pushing the push block causes the sliding plate to move, simultaneously causing the triangular block to retract into the mounting cover. The reset spring is compressed, and the triangular block retracts into the mounting cover. Then, the rotating plate is pushed to move along the rotating shaft towards the hook, thereby opening the rotating plate. Simultaneously, when the rotating shaft rotates, it drives the gear to rotate, pushing the rack downwards and compressing the first spring. Next, the hook is hung in the hanging hole of the hanging plate. Then, the rotating plate and the push block are released. The triangular block can extend from the mounting cover under the action of the return spring, and the rack can move upward to reset under the action of the first spring, pushing the gear and the rotating shaft to rotate. When the rotating shaft rotates, it drives the rotating plate to rotate and close. Also, when the rotating shaft rotates, it drives the rectangular block to rotate. When the rectangular block abuts against the inclined plane, it can push the triangular block to move into the mounting cover. At the same time, the return spring is compressed. When the rectangular block passes the triangular block, the triangular block can extend outward under the action of the return spring, and the limiting surface abuts against the side wall of the rectangular block. This can limit the rotating shaft and the rotating plate, preventing the hook from loosening and disengaging, making it more stable and reliable, and ensuring the effectiveness and lifespan of the entire device.

[0017] (3) This easy-to-replace converter oxygen top-blown nozzle dustproof and energy-saving device, by setting up a pressure regulating mechanism, can push the sealing ball upward when the pressure in the sealed space is too high. At the same time, the second spring is compressed. At this time, exhaust can be carried out through the hollow plate. When it is necessary to adjust the pressure, the rocker wheel can be turned. The rotation of the rocker wheel drives the rotation of the threaded rod, thereby driving the hollow plate to rise and fall. When the hollow plate rises and falls, the compression of the second spring can be adjusted, thereby adjusting the squeezing force of the sealing ball on the conical sleeve, and thus adjusting the exhaust pressure. It is more convenient and quick to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the hook in this invention;

[0020] Figure 3 This is a schematic diagram of the overall structure of the hook in this invention from another perspective;

[0021] Figure 4 This is a schematic diagram of the overall structure of the air pressure regulating mechanism in this invention;

[0022] Figure 5 This is a partial cross-sectional view of the exhaust pipe in this invention;

[0023] Figure 6 for Figure 2 Enlarged structural diagram at point A;

[0024] Figure 7 for Figure 3 Enlarged structural diagram at point B;

[0025] Figure 8 for Figure 6 Enlarged structural diagram at point C;

[0026] Figure 9 for Figure 7 A magnified structural diagram at point D.

[0027] In the diagram: 1. Split cover; 2. Gas pressure regulating mechanism; 201. Exhaust pipe; 202. Conical sleeve; 203. Sealing ball; 204. Hollowed-out disc; 3. Hanging plate; 4. Pressure plate; 5. Positioning ring; 6. Telescopic sleeve; 7. Chain; 8. Split smoke baffle; 9. Seal; 10. Conical device; 11. Split flange; 12. Converter top-blown conical spray gun; 13. Spray gun water jacket inlet; 14. Nitrogen sealing ring; 15. Hook; 16. Rotating shaft; 17. Rotating plate; 1801. Rectangular block; 1802. Fixing plate; 1803. Mounting cover; 1804. Sliding plate; 1805. Triangular block; 1806. Inclined surface; 1807, limiting surface; 1901, first sleeve; 1902, first sleeve rod; 1903, return spring; 2001, gear; 2002, rack; 2101, connecting block; 2102, guide rod; 2103, slider; 2104, first spring; 2105, support plate; 2201, first support block; 2202, second sleeve rod; 2203, second sleeve; 2204, second support block; 2205, threaded rod; 2206, threaded tube; 2207, rocker wheel; 23, second spring; 24, scale marking; 2501, slide groove; 2502, push block. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-9 This invention provides a dustproof and energy-saving device for a converter oxygen top-blown spray gun that is easy to replace. It includes a spray gun water jacket inlet 13 located on the side wall of a converter top-blown conical spray gun 12, with a nitrogen sealing ring 14 inside the water jacket inlet 13. A conical device 10 is located inside the nitrogen sealing ring 14, and a seal 9 is provided between the conical device 10 and the nitrogen sealing ring 14. A split cover 1 is fixedly fitted onto the side wall of the converter top-blown conical spray gun 12, and a hanging plate 3 is fixedly connected to the split cover 1. A positioning ring 5 is fixedly fitted onto the side wall of the converter top-blown conical spray gun 12, and the positioning ring 5 is used for… To restrict the downward movement of the split cover 1 on the converter top-blown conical spray gun 12, multiple chains 7 are detachably connected between the conical device 10 and the hanging plate 3, and hooks 15 are provided at both ends of the chains 7. A telescopic sleeve 6 is fitted onto the side wall of the converter top-blown conical spray gun 12, and both ends of the telescopic sleeve 6 are fixed to the conical device 10 and the split cover 1 respectively by pressure plates 4. A split flange 11 is provided inside the inner hole of the conical device 10, and a split smoke baffle 8 is used inside the conical device 10. A rotating plate 17 is rotatably connected to the side wall of the hook 15 via a rotating shaft 16. The side wall of the hook 15 is provided with a limiting mechanism for limiting the rotation shaft 16, and the side wall of the hook 15 is provided with a resetting mechanism for resetting the rotation shaft 16. The top of the pressure plate 4 is provided with a gas pressure regulating mechanism 2. A variable-length sealed space is formed above the water jacket inlet 13 of the converter top-blowing conical spray gun 12 by the nitrogen sealing ring 14, the conical device 10, the telescopic sleeve 6, the split cover 1, and the top-blowing conical spray gun 12. When the converter top-blowing conical spray gun 12 is working, the flue gas flows into this sealed space through the gap in the inner hole of the conical device 10. When the pressure inside the space matches the pressure inside the spray gun... When the water jacket inlet 13 is the same, the flue gas stops flowing in. The pressure of the sealed space is adjusted by the air pressure regulating mechanism 2. When it is necessary to replace the seals and easily damaged parts such as the telescopic sleeve 6, the chain 7 is untied, and the pressure plate 4, split flange 11 and split smoke baffle 8 are removed. The cone device 10 and telescopic sleeve 6 can be easily removed from the converter top blowing cone-shaped spray gun 12 for replacement. Without disassembling the converter top blowing cone-shaped spray gun 12, the problem of flue gas overflowing from the spray gun water jacket inlet 13 and consuming a large amount of nitrogen or compressed air during the blowing process of the oxygen top blowing converter is solved.

[0030] The limiting mechanism includes multiple rectangular blocks 1801 fixedly connected to the side wall of the rotating shaft 16, and a fixing plate 1802 fixedly connected to the side wall of the hook 15. A mounting cover 1803 is fixedly connected to the top of the fixing plate 1802, and a sliding plate 1804 is connected inside the mounting cover 1803 via a telescopic mechanism. Multiple triangular blocks 1805 are fixedly connected to the side wall of the sliding plate 1804, and the side wall of each triangular block 1805 is provided with an inclined surface 1806 and a limiting surface 1807. The movement of the sliding plate 1804 is driven by a pushing mechanism. The rotating plate 17 can rotate and close under the action of a reset mechanism. Furthermore, when the rotating shaft... When the rotating shaft 16 rotates, it drives the rectangular block 1801 to rotate. When the rectangular block 1801 abuts against the inclined surface 1806, it can push the triangular block 1805 to move into the mounting cover 1803. At the same time, the return spring 1903 is compressed. When the rectangular block 1801 passes the triangular block 1805, the triangular block 1805 can extend outward under the action of the telescopic mechanism, and make the limiting surface 1807 abut against the side wall of the rectangular block 1801. This can limit the rotating shaft 16 and the rotating plate 17, prevent the hook 15 from loosening and disengaging, make it more stable and reliable, and ensure the effectiveness and life of the entire device.

[0031] The telescopic mechanism includes two symmetrically arranged first sleeves 1901 fixedly connected to the inner side wall of the mounting cover 1803, and a first sleeve rod 1902 is inserted into each first sleeve 1901. The other end of the first sleeve rod 1902 is fixed to the side wall of the sliding plate 1804, and a return spring 1903 is sleeved on the side wall of each first sleeve 1901, which guides and resets the movement of the sliding plate 1804.

[0032] The pushing mechanism includes a groove 2501 formed on the top of the mounting cover 1803, and a pushing block 2502 is slidably connected in the groove 2501. The pushing block 2502 is fixed to the top of the sliding plate 1804. Pushing the pushing block 2502 causes the sliding plate 1804 to move, and at the same time, the triangular block 1805 retracts into the mounting cover 1803. The return spring 1903 is compressed, and the triangular block 1805 retracts into the mounting cover 1803.

[0033] The reset mechanism includes a gear 2001 fixedly sleeved on the side wall of the rotating shaft 16, and a rack 2002 connected to the side wall of the hook 15 through a reset assembly. The rack 2002 meshes with the gear 2001, pushing the rotating plate 17 to move along the rotating shaft 16 toward the hook 15, thereby opening the rotating plate 17. At the same time, when the rotating shaft 16 rotates, it can drive the gear 2001 to rotate, and push the rack 2002 to move downward.

[0034] The reset assembly includes a support plate 2105 fixedly connected to the side wall of the hook 15, and two connecting blocks 2101 fixedly connected to the side wall of the support plate 2105. Two guide rods 2102 are fixedly connected to the opposite side walls of the two connecting blocks 2101. A slider 2103 is sleeved on the side wall of each guide rod 2102. The slider 2103 is fixed to the side wall of the rack 2002. A first spring 2104 is sleeved on the side wall of each guide rod 2102, which guides and resets the movement of the rack 2002.

[0035] The air pressure regulating mechanism 2 includes an exhaust pipe 201 fixedly inserted into the top of the pressure plate 4, and the lower end of the exhaust pipe 201 is connected to the telescopic sleeve 6. A conical sleeve 202 is fixedly inserted into the exhaust pipe 201, and a hollow plate 204 is connected to the exhaust pipe 201 through a lifting mechanism. A sealing ball 203 is connected to the bottom of the hollow plate 204 through a telescopic component, and the sealing ball 203 abuts against the inner wall of the conical sleeve 202. When the pressure of the sealed space is too high, it can push the sealing ball 203 to move upward. At this time, exhaust can be carried out through the hollow plate 204.

[0036] The lifting mechanism includes a first support block 2201 and a second support block 2204 fixedly connected to the inner wall of the exhaust pipe 201. A second sleeve rod 2202 is fixedly connected to the bottom of the first support block 2201. A second sleeve 2203 is sleeved on the side wall of the second sleeve rod 2202, and the lower end of the second sleeve 2203 is fixed to the top of the hollow plate 204. A threaded rod 2205 is rotatably connected to the bottom of the second support block 2204, and a threaded rod is threaded to the side wall of the threaded rod 2205. The lower end of the threaded tube 2206 is fixed to the top of the hollowed-out disc 204, and the upper end of the threaded rod 2205 is fixedly connected to a rocker wheel 2207. Rotating the rocker wheel 2207 drives the rotation of the threaded rod 2205, thereby driving the hollowed-out disc 204 to rise and fall. When the hollowed-out disc 204 rises and falls, the pressure of the sealing ball 203 on the conical sleeve 202 can be adjusted by adjusting the telescopic component, thereby adjusting the pressure of the exhaust. This makes it more convenient and faster to use.

[0037] The telescopic component includes a second spring 23 fixedly connected to the bottom of the hollowed-out disk 204, and the lower end of the second spring 23 is fixed to the sealing ball 203. When the hollowed-out disk 204 is raised or lowered, the compression of the second spring 23 can be adjusted, thereby adjusting the squeezing force of the sealing ball 203 on the conical sleeve 202.

[0038] The inner wall of the exhaust pipe 201 is provided with scale markings 24 to facilitate observation of the position of the hollowed-out disc 204, thereby controlling the compression of the second spring 23.

[0039] Working principle: During use, a variable-length sealed space is formed above the water jacket inlet 13 of the converter top-blown conical spray gun 12 by using nitrogen sealing ring 14, conical device 10, telescopic sleeve 6, split cover 1, and converter top-blown conical spray gun 12. When the converter top-blown conical spray gun 12 is working, the flue gas flows into this sealed space through the gap in the inner hole of the conical device 10. When the pressure in the space is the same as that in the water jacket inlet 13 of the spray gun, the flue gas stops flowing in. The pressure of the sealed space is adjusted by the air pressure regulating mechanism 2. When it is necessary to replace the seals and easily damaged parts such as telescopic sleeve 6, the chain 7 is untied, and the pressure plate 4, split flange 11 and split smoke baffle 8 are removed. The conical device 10 and telescopic sleeve 6 can be easily removed from the converter top-blown conical spray gun 12 for replacement. This solves the problem of flue gas overflowing from the water jacket inlet 13 of the spray gun and consuming a large amount of nitrogen or compressed air during the blowing process of the oxygen top-blown converter without disassembling the converter top-blown conical spray gun 12.

[0040] When in use, the hook 15 at the end of the chain 7 needs to be hung in the hanging hole of the hanging plate 3. Push the push block 2502 to move the sliding plate 1804. At the same time, the triangular block 1805 retracts into the mounting cover 1803, the return spring 1903 is compressed, and the triangular block 1805 retracts into the mounting cover 1803. Then, push the rotating plate 17 to move along the rotating shaft 16 towards the hook 15, thereby opening the rotating plate 17. At the same time, when the rotating shaft 16 rotates, it can drive the gear 2001 to rotate. Simultaneously, push the rack 2002 to move downward, and the first spring 2104 is compressed. Then, hang the hook 15 in the hanging hole of the hanging plate 3.

[0041] Then, release the rotating plate 17 and the pushing block 2502. The triangular block 1805 can extend from the mounting cover 1803 under the action of the return spring 1903. The rack 2002 can move upward to reset under the action of the first spring 2104, and push the gear 2001 and the rotating shaft 16 to rotate. When the rotating shaft 16 rotates, it drives the rotating plate 17 to rotate and close. Also, when the rotating shaft 16 rotates, it drives the rectangular block 1801 to rotate. When the rectangular block 1801 is in contact with the inclined plane 1... When 806 is in contact, it can push the triangular block 1805 into the mounting cover 1803. At the same time, the return spring 1903 is compressed. When the rectangular block 1801 passes the triangular block 1805, the triangular block 1805 can extend outward under the action of the return spring 1903, and the limiting surface 1807 abuts against the side wall of the rectangular block 1801. This can limit the rotation shaft 16 and the rotating plate 17, prevent the hook 15 from loosening and falling off, make it more stable and reliable, and ensure the effectiveness and life of the entire device.

[0042] Furthermore, when the pressure in the sealed space is too high, it can push the sealing ball 203 to move upward. At the same time, the second spring 23 is compressed, allowing exhaust through the perforated disc 204. When the pressure needs to be adjusted, the rocker wheel 2207 can be rotated. The rotation of the rocker wheel 2207 drives the rotation of the threaded rod 2205, thereby causing the perforated disc 204 to rise and fall. When the perforated disc 204 rises and falls, the compression of the second spring 23 can be adjusted, thereby adjusting the squeezing force of the sealing ball 203 on the conical sleeve 202, and thus adjusting the exhaust pressure, making it more convenient and quick to use.

Claims

1. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace, comprising a nozzle water jacket inlet (13) disposed on the side wall of a converter top-blowing conical nozzle (12), and a nitrogen sealing ring (14) disposed inside the nozzle water jacket inlet (13), characterized in that: A conical device (10) is provided inside the nitrogen sealing ring (14), and there is a seal (9) between the conical device (10) and the nitrogen sealing ring (14). A split cover (1) is fixedly sleeved on the side wall of the converter top-blown conical spray gun (12), and a hanging plate (3) is fixedly connected to the split cover (1). A positioning ring (5) is fixedly sleeved on the side wall of the converter top-blown conical spray gun (12), and the positioning ring (5) is used to restrict the split cover (1) from moving downward on the converter top-blown conical spray gun (12). Multiple chains (7) are detachably connected between the conical device (10) and the hanging plate (3), and hooks (15) are provided at both ends of the chains (7). The gun (12) is fitted with a telescopic sleeve (6) on its side wall, and the two ends of the telescopic sleeve (6) are fixed to the cone device (10) and the split cover (1) respectively by pressure plate (4). The cone device (10) is provided with a split flange (11) in its inner hole, and a split smoke baffle (8) is used in the cone device (10). The side wall of the hook (15) is rotatably connected to a rotating plate (17) through a rotating shaft (16), and the side wall of the hook (15) is provided with a limiting mechanism for limiting the rotating shaft (16). The side wall of the hook (15) is provided with a resetting mechanism for resetting the rotating shaft (16), and the top of the pressure plate (4) is provided with a gas pressure regulating mechanism (2).

2. The dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 1, characterized in that: The limiting mechanism includes multiple rectangular blocks (1801) fixedly connected to the side wall of the rotating shaft (16), and a fixing plate (1802) fixedly connected to the side wall of the hook (15). A mounting cover (1803) is fixedly connected to the top of the fixing plate (1802), and a sliding plate (1804) is connected inside the mounting cover (1803) through a telescopic mechanism. Multiple triangular blocks (1805) are fixedly connected to the side wall of the sliding plate (1804), and the side wall of the triangular blocks (1805) is provided with an inclined surface (1806) and a limiting surface (1807). The movement of the sliding plate (1804) is driven by a pushing mechanism.

3. The dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 2, characterized in that: The telescopic mechanism includes two symmetrically arranged first sleeves (1901) fixedly connected to the inner side wall of the mounting cover (1803), and a first sleeve rod (1902) is inserted into each first sleeve (1901). The other end of the first sleeve rod (1902) is fixed to the side wall of the sliding plate (1804), and a return spring (1903) is sleeved on the side wall of each first sleeve (1901).

4. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace, as described in claim 2, is characterized in that: The pushing mechanism includes a groove (2501) formed on the top of the mounting cover (1803), and a pushing block (2502) is slidably connected in the groove (2501), the pushing block (2502) being fixed to the top of the sliding plate (1804).

5. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 1, characterized in that: The reset mechanism includes a gear (2001) fixedly sleeved on the side wall of the rotating shaft (16), and a rack (2002) is connected to the side wall of the hook (15) through the reset assembly. The rack (2002) is meshed with the gear (2001).

6. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 5, characterized in that: The reset assembly includes a support plate (2105) fixedly connected to the side wall of the hook (15), and two connecting blocks (2101) are fixedly connected to the side wall of the support plate (2105). Two guide rods (2102) are fixedly connected to the opposite side walls of the two connecting blocks (2101), and a slider (2103) is sleeved on the side wall of each guide rod (2102). The slider (2103) is fixed to the side wall of the rack (2002), and a first spring (2104) is sleeved on the side wall of each guide rod (2102).

7. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 1, characterized in that: The air pressure regulating mechanism (2) includes an exhaust pipe (201) fixedly inserted on the top of the pressure plate (4), and the lower end of the exhaust pipe (201) is connected to the telescopic sleeve (6). A conical sleeve (202) is fixedly inserted inside the exhaust pipe (201), and a hollow plate (204) is connected inside the exhaust pipe (201) through a lifting mechanism. A sealing ball (203) is connected to the bottom of the hollow plate (204) through a telescopic component, and the sealing ball (203) abuts against the inner wall of the conical sleeve (202).

8. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 7, characterized in that: The lifting mechanism includes a first support block (2201) and a second support block (2204) fixedly connected to the inner side wall of the exhaust pipe (201). The bottom of the first support block (2201) is fixedly connected to a second sleeve rod (2202). The side wall of the second sleeve rod (2202) is fitted with a second sleeve tube (2203). The lower end of the second sleeve tube (2203) is fixed to the top of the hollow plate (204). The bottom of the second support block (2204) is rotatably connected to a threaded rod (2205). The side wall of the threaded rod (2205) is threadedly connected to a threaded tube (2206). The lower end of the threaded tube (2206) is fixed to the top of the hollow plate (204). The upper end of the threaded rod (2205) is fixedly connected to a rocker wheel (2207).

9. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 7, characterized in that: The telescopic component includes a second spring (23) fixedly connected to the bottom of the hollow disc (204), and the lower end of the second spring (23) is fixed to the sealing ball (203).

10. A dustproof and energy-saving device for a converter oxygen top-blowing nozzle that is easy to replace according to claim 8, characterized in that: The inner wall of the exhaust pipe (201) is provided with scale markings (24).

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