Nitrogen sealing cap device of oxygen lance
By designing an oxygen lance nitrogen sealing cap device that combines a conical nitrogen sealing cap with a sealing plate, the problems of excessive force on one side of the sealing ring and slag removal were solved, achieving a stable sealing effect and slag removal, while reducing manpower and nitrogen consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-31
AI Technical Summary
When using existing oxygen lance nitrogen sealing cap devices, the sealing ring is subjected to excessive force on one side and in one direction, which leads to damage to the sealing ring and water leakage. In addition, it requires frequent cleaning of accumulated residue, which increases labor costs and nitrogen consumption.
An oxygen lance nitrogen sealing cap device was designed, which combines a conical nitrogen sealing cap with a sealing plate. A nozzle is set at the bottom of the sealing plate for cleaning up the accumulated residue. Gas is supplied through a pneumatic connector and a gas pipeline system to achieve stable sealing of the sealing ring and cleaning of the accumulated residue.
This effectively avoids damage to the sealing ring, reduces the need for manual cleaning of accumulated residue, lowers nitrogen consumption, and improves the sealing performance and efficiency of the production process.
Smart Images
Figure CN224062805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oxygen lance technology, and in particular to an oxygen lance nitrogen sealing cap device. Background Technology
[0002] An oxygen lance is an important device used to deliver oxygen into metallurgical equipment such as furnaces and converters.
[0003] When existing oxygen lances are used in conjunction with nitrogen sealing caps, the lance body is inserted into the converter from the converter port. However, when the visor of the existing nitrogen sealing cap contacts the upper flange of the converter port, slag often accumulates on the flange, causing the nitrogen sealing cap to become uneven. This results in a large amount of yellow smoke being generated during subsequent production, requiring increased nitrogen sealing pressure and constant manual cleaning of the slag, leading to high nitrogen consumption and increased labor costs.
[0004] This invention is a nitrogen sealing cap device for an oxygen lance, developed to solve the above-mentioned problems. Utility Model Content
[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an oxygen lance nitrogen sealing cap device, which solves the problem of water leakage caused by excessive force on one side and in one direction of the sealing ring, and reduces the problem of abnormal lance replacement caused by water leakage of the sealing ring.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] An oxygen lance nitrogen sealing cap device includes an oxygen lance inserted into a furnace body. A nitrogen sealing cap is fixedly installed around the lower part of the oxygen lance body. A connecting component is provided on the oxygen lance body above the nitrogen sealing cap. A sealing plate is provided below the nitrogen sealing cap and is movably sleeved under the nitrogen sealing cap.
[0008] The connection component includes:
[0009] An annular sleeve is movably fitted onto the outside of the oxygen lance body and located above the nitrogen sealing cap. A pneumatic connector is provided on one side of the annular sleeve, and the pneumatic connector is provided with multiple interfaces.
[0010] The bottom of the cover plate is provided with several nozzles. A first limit switch is fixedly installed on one side of the upper surface of the cover plate, and a second limit switch is fixedly installed on the other side of the upper surface of the cover plate. The first and second limit switches are symmetrically distributed.
[0011] Preferably, a plurality of connecting rods are fixedly installed on the outer wall of the annular sleeve. The connecting rods are L-shaped, and the lower ends of the plurality of connecting rods are fixedly connected to the top of the cover plate.
[0012] Preferably, the sealing plate is a hollow annular plate structure, the nitrogen sealing cap is a conical structure, and the large diameter end of the nitrogen sealing cap faces upward and the small diameter end faces downward. The diameter of the middle annular plate of the sealing plate is larger than the small diameter end of the nitrogen sealing cap, but smaller than the large diameter end.
[0013] Preferably, the bottom of the cover plate has several grooves, and several nozzles are fixedly installed in the corresponding grooves. The air outlet of the nozzle has a beveled structure with its air outlet facing downwards.
[0014] Preferably, each of the nozzles has an air pipe fixedly installed at its tail end. Each air pipe is located in a groove, and the upper end of each air pipe passes through the top of the cover plate. The upper ends of the air pipes are connected to the corresponding interfaces of the pneumatic connectors. The pneumatic connectors are fixedly installed on the outside of one side of the annular sleeve by means of connectors.
[0015] Preferably, the upper end of the furnace body is provided with a converter port, and a hole is opened on one side of the upper surface of the converter port. A spring is fixedly installed in the hole, and a limiting plate is fixedly installed on the top of the spring. The diameter of the limiting plate is smaller than the diameter of the hole.
[0016] Preferably, the lower contact of the first limit switch penetrates the bottom of the cover plate, and the lower contact of the first limit switch corresponds to the position of the limit plate. The lower contact of the second limit switch penetrates the bottom of the cover plate and is flush with the lower surface of the cover plate.
[0017] This utility model has the following beneficial effects:
[0018] By changing the nitrogen sealing cap to a conical structure, the conical surface of the nitrogen sealing cap forms a linear contact with the inner ring of the nitrogen seal at the oxygen lance hole, thus avoiding the influence of slag accumulation at the oxygen lance hole. This eliminates the need to increase the nitrogen sealing pressure or assign personnel to clean the slag accumulation at the oxygen lance hole. Furthermore, several nozzles installed at the bottom of the sealing plate allow the gas from the nozzles to effectively act on the area near the converter port, cleaning the slag accumulation at the converter port. The sealing plate's coverage of the converter port further enhances the sealing effect, effectively preventing gas from escaping from the furnace and ensuring the airtightness of the production process. Attached Figure Description
[0019] Figure 1 A schematic diagram showing the connection between the oxygen lance and the converter provided by this utility model;
[0020] Figure 2 A first-view exploded view of the overall structure of this utility model;
[0021] Figure 3 A second-view exploded view of the overall structure provided by this utility model;
[0022] Figure 4 A perspective view of the oxygen lance provided by this utility model;
[0023] Figure 5 Provided by this utility model Figure 2 Enlarged view of area A.
[0024] Among them are:
[0025] 1. Oxygen lance; 2. Nitrogen sealing cap;
[0026] 3. Furnace body; 31. Converter port; 32. Hole; 33. Limiting plate; 34. Spring;
[0027] 4. Connecting components; 41. Annular sleeve; 42. Connecting rod; 43. Pneumatic connector;
[0028] 5. Cover plate; 51. Groove; 52. Nozzle; 53. Air pipe; 54. Limit switch No. 1; 55. Limit switch No. 2. Detailed Implementation
[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
[0030] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.
[0031] like Figure 1-5 As shown, an oxygen lance nitrogen sealing cap device includes an oxygen lance 1, which is inserted into a furnace body 3. A nitrogen sealing cap 2 is fixedly installed under the body of the oxygen lance 1. A connecting component 4 is provided on the body of the oxygen lance 1 and above the nitrogen sealing cap 2. A sealing plate 5 is provided below the nitrogen sealing cap 2 and is movably sleeved under the nitrogen sealing cap 2.
[0032] Connection component 4 includes:
[0033] The annular sleeve 41 is movably sleeved on the outside of the oxygen lance 1 and located above the nitrogen sealing cap 2. A pneumatic connector 43 is provided on one side of the annular sleeve 41, and the pneumatic connector 43 is provided with multiple interfaces.
[0034] The bottom of the cover plate 5 is provided with several nozzles 52. A first limit switch 54 is fixedly installed on one side of the upper surface of the cover plate 5, and a second limit switch 55 is fixedly installed on the other side of the upper surface of the cover plate 5. The first limit switch 54 and the second limit switch 55 are symmetrically distributed.
[0035] In this embodiment, on the one hand, the cover plate 5 covers the converter port 31 and the connection between the upper end of the conical nitrogen sealing cap 2 and the converter port 31, further enhancing the sealing effect, effectively preventing gas from escaping from the furnace, and ensuring the sealing of the production process; on the other hand, its unique structural design, in conjunction with the nitrogen sealing cap 2, achieves a reasonable layout of the nozzle 52 position, providing a basis for cleaning slag and strengthening the seal.
[0036] Specifically, multiple connecting rods 42 are fixedly installed on the outer wall of the annular sleeve 41. The connecting rods 42 have an L-shaped structure, and the lower ends of the multiple connecting rods 42 are fixedly connected to the top of the cover plate 5.
[0037] In this embodiment, the annular sleeve 41 is movably sleeved on the outside of the oxygen lance 1 body, and is connected to the cover plate 5 by multiple L-shaped connecting rods 42. This ensures the stability of the connection and gives the cover plate 5 a certain degree of freedom of movement, preventing the cover plate 5 from falling off the lower end of the nitrogen sealing cap 2.
[0038] Specifically, the sealing plate 5 is a hollow ring plate structure, the nitrogen sealing cap 2 is a conical structure, and the large diameter end of the nitrogen sealing cap 2 faces upward and the small diameter end faces downward. The diameter of the middle ring of the sealing plate 5 is larger than the small diameter end of the nitrogen sealing cap 2, but smaller than the large diameter end.
[0039] In this embodiment, a conical structure with the larger diameter end facing upwards and the smaller diameter end facing downwards is adopted. The advantage of this conical nitrogen sealing cap 2 is that it can effectively avoid slag accumulation at the upper flange of the converter port 31, and is not affected by slag accumulation, thus ensuring the sealing effect.
[0040] Specifically, the bottom of the cover plate 5 has several grooves 51, and several nozzles 52 are fixedly installed in the corresponding grooves 51. The air outlet of the nozzle 52 is a slanted structure with its air outlet facing downward.
[0041] In this embodiment, the downward-facing design of the nozzle 52 allows the gas ejected from the nozzle 52 to act precisely and concentratedly on the vicinity of the converter port 31, cleaning the slag accumulated on the converter port 31. This effectively solves the problem of slag affecting the seal and also helps to form an air curtain at the converter port 31, further enhancing the sealing effect when the lower end of the nitrogen sealing cap 2 enters the converter port 31.
[0042] Specifically, each of the nozzles 52 has an air pipe 53 fixedly installed at its tail end. Each air pipe 53 is located in the groove 51, and the upper end of each air pipe 53 passes through the top of the cover plate 5. The upper ends of the air pipes 53 are connected to the corresponding interfaces of the pneumatic connector 43. The pneumatic connector 43 is fixedly installed on the outside of one side of the annular sleeve 41 through a connector.
[0043] In this embodiment, the pneumatic connector 43 is connected to an external air pump, and the air pipe 53 enables a stable transmission of gas through the air pump, then through the pneumatic connector 43 to the nozzle 52, ensuring that the nozzle 52 can continuously obtain an air source, providing a stable gas supply for cleaning deposits and strengthening the seal. Furthermore, the pneumatic connector 43, as a key component for gas distribution, can rationally distribute the input gas to each air pipe 53, and then deliver it to each nozzle 52, achieving an orderly supply of multiple gas paths to meet the needs of the nozzle 52 for cleaning deposits and strengthening the seal at different locations.
[0044] Specifically, the upper end of the furnace body 3 is provided with a converter port 31, and a hole 32 is opened on one side of the upper surface of the converter port 31. A spring 34 is fixedly installed in the hole 32, and a limit plate 33 is fixedly installed on the top of the spring 34. The diameter of the limit plate 33 is smaller than the diameter of the hole 32.
[0045] In this embodiment, since the contact length of the first limit switch 54 is longer than that of the second limit switch 55 and exceeds the lower surface of the cover plate 5, the contact of the first limit switch 54 contacts the upper surface of the converter port 31 first. Simultaneously, as the position of the cover plate 5 continues to descend with the conical nitrogen cap 2, to prevent the contact of the first limit switch 54 from breaking under force and to enable timely activation of the external air pump, a hole 32 is provided, and a spring 34 is installed, allowing the limiting plate 33 to automatically rise and fall and reset within the hole 32.
[0046] Specifically, the lower contact of the first limit switch 54 penetrates the bottom of the cover plate 5, and the lower contact of the first limit switch 54 corresponds to the position of the limit plate 33. The lower contact of the second limit switch 55 penetrates the bottom of the cover plate 5 and is flush with the lower surface of the cover plate 5.
[0047] In this embodiment, the pneumatic connector 43 is connected to an external air pump, which is electrically connected to the controller. Both limit switches 54 and 55 are equipped with wireless radio frequency (RF) transmitter modules, and the controller is equipped with an RF receiver module. When the contact of limit switch 54 touches the limit plate 33 on the converter port 31, the transmitter module modulates the switch status signal onto an RF signal and transmits it. The controller receives and demodulates the RF signal from limit switch 54, thereby controlling the start of the external air pump. When the contact of limit switch 55 touches the upper surface of converter port 31, the transmitter module modulates the switch status signal onto an RF signal and transmits it. The controller receives and demodulates the RF signal from limit switch 55, thereby controlling the stop of the external air pump.
[0048] In operation, the oxygen lance 1 descends together with the nitrogen sealing cap 2 and the sealing plate 5. At this time, the first limit switch 54 is not triggered, and the external gas pump is not started, so no gas is ejected from the nozzle 52. As the oxygen lance 1 continues to descend, when the smaller diameter end of the conical nitrogen sealing cap 2 enters the converter port 31 first, and the contact of the first limit switch 54 at the bottom of the sealing plate 5 contacts the limit plate 33, the first limit switch 54 sends a signal to the external controller via radio frequency. The controller then controls the gas pump to start, beginning to deliver gas to several nozzles 52. The gas is ejected from the nozzles 52, directly blowing away the slag accumulated on the converter port 31.
[0049] When the large-diameter end of the conical nitrogen sealing cap 2 finally enters the converter port 31, the annular sealing plate 5 engages with the large-diameter end of the nitrogen sealing cap 2, thus fixing the position of the sealing plate 5 in place. Meanwhile, the contact of the first limit switch 54 abuts against the limit plate 33 in the hole 32, compressing the spring 34. At this time, the lower surface of the sealing plate 5 contacts the upper surface of the converter port 31, and the contact of the second limit switch 55 contacts the upper surface of the converter port 31. The second limit switch 55 sends a signal to the external controller via radio frequency, and the controller controls the air pump to stop immediately, thereby stopping the blowing of several nozzles 52, so that the sealing plate 5 is stably pressed onto the converter port 31.
[0050] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.
Claims
1. A nitrogen sealing cap device for oxygen lance (1) inserted in a furnace body (3), characterized in that: The lower part of the lance body of the oxygen lance (1) is fixedly wrapped with a nitrogen sealing cap (2), the upper part of the lance body of the oxygen lance (1) is provided with a connecting assembly (4) above the nitrogen sealing cap (2), and the lower part of the nitrogen sealing cap (2) is provided with a cover plate (5) which is movably sleeved on the lower part of the nitrogen sealing cap (2); The connecting assembly (4) comprises: An annular sleeve (41) is movably sleeved on the outer part of the lance body of the oxygen lance (1) and above the nitrogen sealing cap (2), one side of the outer part of the annular sleeve (41) is provided with a pneumatic connector (43), and the pneumatic connector (43) is provided with a plurality of interfaces. The bottom of the cover plate (5) is provided with a plurality of nozzles (52), one side of the upper surface of the cover plate (5) is fixedly provided with a first travel switch (54), and the other side of the upper surface of the cover plate (5) is fixedly provided with a second travel switch (55), and the first travel switch (54) and the second travel switch (55) are symmetrically distributed.
2. The nitrogen sealing cap device for oxygen lance according to claim 1, characterized in that: The outer wall of the annular sleeve (41) is fixedly provided with a plurality of connecting rods (42), the connecting rods (42) are in L-shaped structure, and the lower ends of the plurality of connecting rods (42) are fixedly connected with the top of the cover plate (5).
3. The nitrogen sealing cap device for oxygen lance according to claim 1, characterized in that: The cover plate (5) is a hollow circular plate structure, the nitrogen sealing cap (2) is a conical structure, the large-diameter end of the nitrogen sealing cap (2) faces upward, the small-diameter end faces downward, the diameter of the middle circular ring of the cover plate (5) is greater than that of the small-diameter end of the nitrogen sealing cap (2) and less than that of the large-diameter end.
4. The nitrogen sealing cap device for oxygen lance according to claim 3, characterized in that: The bottom of the cover plate (5) is provided with a plurality of grooves (51), and a plurality of nozzles (52) are fixedly installed in the corresponding grooves (51), and the gas outlet port of the nozzle (52) is in inclined surface structure, and the gas blowing port faces downward.
5. The nitrogen sealing cap device for oxygen lance according to claim 4, characterized in that: The tail end of each nozzle (52) is fixedly provided with an air pipe (53), each air pipe (53) is located in the groove (51), and the upper end of each air pipe (53) penetrates through the top of the cover plate (5), the upper end of each air pipe (53) is connected with the corresponding interface of the pneumatic connector (43), and the pneumatic connector (43) is fixedly installed on one side of the outer part of the annular sleeve (41) through a connecting piece.
6. The nitrogen sealing cap device for oxygen lance according to claim 1, characterized in that: The upper end of the furnace body (3) is provided with a converter port (31), one side of the upper surface of the converter port (31) is provided with a hole (32), the spring (34) is fixedly installed in the hole (32), the top end of the spring (34) is fixedly installed with a limiting plate (33), and the diameter of the limiting plate (33) is less than that of the hole (32).
7. The nitrogen sealing cap device for oxygen lance according to claim 6, characterized in that: The lower end contact of the first travel switch (54) penetrates through the bottom of the cover plate (5), the lower end contact of the first travel switch (54) corresponds to the position of the limiting plate (33), the lower end contact of the second travel switch (55) penetrates through the bottom of the cover plate (5) and is flush with the lower surface of the cover plate (5).