Jet flow oxygen lance with plum-blossom-shaped nozzle and using method

Abstract

The invention discloses a jet oxygen lance with a plum-blossom-shaped nozzle and a using method, and relates to the technical field of pipeline engineering construction. A gas cavity channel and a water cooling cavity channel are respectively arranged in the oxygen lance main body; a muzzle part is arranged at the end part of the oxygen lance main body, the muzzle part is communicated with the gas cavity channel, and a water cooling cavity channel is arranged outside the gas cavity channel in a surrounding manner; the muzzle part is internally provided with a plum-blossom-shaped pipe part and a drainage channel, the plum-blossom-shaped pipe part is fixed in the muzzle part and communicates with the drainage channel, and the end, away from the plum-blossom-shaped pipe part, of the drainage channel is provided with a plum-blossom-shaped guide opening; the end, away from the gas cavity channel, of the plum-blossom-shaped pipe piece is a plum-blossom-shaped nozzle, a first petal notch is formed in the plum-blossom-shaped nozzle, a second petal notch is formed in the plum-blossom-shaped guiding opening, the first petal notch and the second petal notch are connected in a staggered mode, and the included angle between the connecting line and the central axis of the gas cavity channel ranges from 0 degree to 15 degrees, so that the distribution reasonability and the utilization efficiency of oxygen jet flow are improved. The smelting effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen injection in steel smelting, and specifically relates to a jet oxygen lance with a plum blossom-shaped nozzle and a using method thereof. Background Art

[0002] In the processes of oxygen blowing in steel smelting, lime calcination, and all-oxygen or oxygen-enriched combustion in steel rolling heating, the jet oxygen lance is a key device for injecting oxygen into the furnace. Its nozzle structure directly affects the characteristics and distribution of the oxygen jet, and thus has an important impact on smelting efficiency, molten steel quality, calcination and heating efficiency, and furnace lining life. Most of the nozzles of traditional jet oxygen lances are round holes, such as a horizontal hole oxygen lance for washing furnace slag in CN201821433582.2.

[0003] The circular tube-shaped oxygen lance nozzle has some limitations in practical applications. The oxygen jet flow ejected from the circular tube-shaped nozzle is relatively concentrated, and the stirring effect in the molten pool or the furnace space is not uniform enough. For the steelmaking process, it will lead to limited reaction speed and mass transfer efficiency of elements in the molten steel, affecting the smelting cycle and the uniformity of molten steel composition; for the calcination and heating processes, there will be local high temperatures, ineffective diffusion of flameless combustion, and low entrainment efficiency, etc. In addition, the concentrated oxygen pipe bundle flow scours the furnace lining and furnace support beams more severely, shortening the service life of the furnace lining and furnace beams, bringing potential accident hazards, and increasing production costs.

[0004] Therefore, it is necessary to improve the nozzle structure of the oxygen lance to improve the rationality of the oxygen jet distribution and utilization efficiency, improve the smelting effect, and improve the heating efficiency. For this reason, we provide a jet oxygen lance with a plum blossom-shaped nozzle and a using method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to make up for the deficiencies of the existing technology and provide a jet oxygen lance with a plum blossom-shaped nozzle, which includes an oxygen lance body. A gas channel and a water cooling channel are respectively arranged in the oxygen lance body; a muzzle part is arranged at the end of the oxygen lance body. The muzzle part is communicated with the gas channel, and a water cooling channel is arranged around the outside of the gas channel;

[0006] A plum blossom tube-shaped part and a drainage channel are installed in the muzzle part. The plum blossom tube-shaped part is fixed in the muzzle part and is communicated with the drainage channel. One end of the drainage channel far from the plum blossom tube-shaped part is provided with a plum blossom guiding port; one end of the plum blossom tube-shaped part far from the gas channel is a plum blossom-shaped nozzle. A petal notch one is opened on the plum blossom-shaped nozzle, and a petal notch two is provided at the plum blossom guiding port. The petal notch one and the petal notch two are connected in a staggered manner, and the connecting line forms an angle of 0-15° with the central axis of the gas channel.

[0007] The oxygen lance nozzle of the present invention abandons the traditional circular tube hole structure and adopts a plum blossom layout. The plum blossom-shaped nozzle is composed of multiple non-closed spray holes arranged in a plum blossom shape around the center. The number of spray holes is usually 5-7, and the included angle and spacing between each spray hole are precisely calculated and optimized to ensure the all-dimensional uniform distribution and reasonable interaction of the oxygen jet.

[0008] Optimization of spray hole parameters: Parameters such as the diameter, length, and expansion angle of each spray hole are specifically designed according to different smelting processes and working conditions such as calcining furnaces / heating furnaces. For example, the spray hole diameter is adjusted according to the oxygen flow rate and pressure; it is matched according to the distribution angle of the secondary air in the calcining kiln; it is distributed according to the arrangement of the regenerator in the regenerative heating furnace, etc., to ensure appropriate oxygen flow velocity and jet diffusion and entrainment effects; the optimization of the spray hole length and expansion angle aims to enable the oxygen jet to form good rigidity, stirring, and smoke entrainment effects after entering the spraying space, while avoiding excessive erosion of the furnace lining and furnace beam. Moreover, the flow characteristics of the plum blossom nozzle can be adjusted through pressure and flow rate parameters.

[0009] In a further technical solution, a stepped notch is provided inside the muzzle part, and the stepped notch is suitable for abutting against a plum blossom tube-shaped part;

[0010] The plum blossom tube-shaped part is provided with 5 petals, and the gas channel structure is a Laval nozzle structure.

[0011] In a further technical solution, the plum blossom tube-shaped part is cylindrical and includes a large-diameter part and a straight part. A plum blossom guide plate is installed inside the large-diameter part, and a plum blossom-shaped groove is opened on the plum blossom guide plate; a conical surface transition is provided between the large-diameter part and the straight part;

[0012] A blocking plate is installed inside the large-diameter part. The blocking plate is on the side of the plum blossom guide plate away from the gas channel. An adjusting structure is installed outside the blocking plate. The adjusting structure is suitable for driving the blocking plate to rotate outside the plum blossom guide plate and blocking the flow area of the plum blossom guide plate.

[0013] In a further technical solution, an arc-shaped notch is opened on the large-diameter part. An outer ring plate is installed inside the arc-shaped notch. A first tooth surface is provided outside the outer ring plate. A toothed plate is meshed and installed outside the outer ring plate. The toothed plate is located outside the large-diameter part; the outer ring plate is integrally connected with the blocking plate;

[0014] An installation cavity is further provided inside the oxygen lance body, and the toothed plate is installed inside the installation cavity;

[0015] The toothed plate is coaxially installed with a transmission rod, and a driving structure is installed at the end of the transmission rod away from the toothed plate.

[0016] In a further technical solution, the driving structure includes a wind vane plate, and one end of the wind vane plate is connected to the transmission rod;

[0017] The wind vane plate is adapted to rotate within the gas passage as oxygen is compressed;

[0018] A stepped surface is provided on the mounting cavity, and a return ring is mounted on the stepped surface. The return ring is fixedly mounted on the stepped surface and sleeved on the transmission rod. The return ring is adapted to drive the transmission rod to rotate and return.

[0019] In a further technical solution, stepped surfaces are provided at both ends of the transmission rod, and a connecting bearing one and a connecting bearing two are respectively mounted. The outer rings of the connecting bearing one and the connecting bearing two are connected to the inner wall of the mounting cavity; and the inner rings are fixedly connected to the transmission rod at corresponding positions.

[0020] In a further technical solution, the return ring includes a ring body shell, and a torsion spring is installed inside the ring body shell. One end of the torsion spring is fixedly connected inside the ring body shell;

[0021] An annular curve groove is formed in the ring body shell, and the annular curve groove is adapted for the torsion spring to rotate;

[0022] The other end of the torsion spring is fixedly connected to the transmission rod.

[0023] In a further technical solution, the inclination angle of the wind vane plate is 3 - 8°, and a side pressure strip is installed at the bottom of the wind vane plate.

[0024] A method for using a jet oxygen lance with a plum blossom-shaped nozzle includes the following steps:

[0025] Step 1, for the assembled jet oxygen lance, multiple water cooling channels are provided outside its gas passage, and a pressurized water pipe is installed outside, and multiple groups of water cooling channels are connected end to end;

[0026] Step 2, introduce oxygen with a flow rate of 0 - a, where a is the limiting flow velocity for driving the wind vane plate; wherein, a position bearing is installed between the wind vane plate and the transmission rod, and the inner ring of the position bearing is fixedly connected to the transmission rod, and the outer ring of the position bearing is fixedly connected to the wind vane plate; limit plates one are installed on both sides of the wind vane plate, and limit plates two are installed on the transmission rod; the limit plates one and the limit plates two are adapted to be in movable abutment;

[0027] Wherein a necking portion is provided on the wind vane plate, and the necking portion is adapted to extend from the mounting cavity into the gas passage; a friction pad one is installed on the necking portion, and the friction pad is located between the limit plate one and the transmission rod; a friction pad two is also provided on the transmission rod, and the friction pad one and the friction pad two rotate by friction;

[0028] The air flow passes through the plum blossom guiding port, changes from linear forward movement to curved distributed forward movement, and exits from the plum blossom-shaped groove, reducing the aggregation effect of the air outlet;

[0029] Step 3: Adjust the air flow rate. When the oxygen flow rate is greater than a, drive the wind vane plate to rotate until the limiting plate 1 abuts against the limiting plate 2, and realize that the rotation of the wind vane plate drives the transmission rod to rotate in the installation cavity. The rotation of the transmission rod drives the torsion spring to rotate; the rotation of the transmission rod drives the toothed plate to engage and drive the outer ring plate to rotate, and the outer ring plate drives the blocking plate to rotate, thereby reducing the flow area of the plum blossom tube-shaped part, and thus realizing the regulation of the oxygen speed and outlet direction at the outlet.

[0030] Compared with the prior art, the following beneficial effects are achieved:

[0031] By changing the nozzle shape, the present invention optimizes the multi-dimensional diffusion distribution of the oxygen jet in the injection space, enhances the stirring and entrainment effects, improves the smelting and heating efficiency, reduces the erosion of the furnace lining or furnace beam at the same time, and prolongs the service life of the furnace lining and furnace beam; and realizes the full-dimensional diffusion and mixed combustion, forming a flameless combustion effect. It also has the following advantages:

[0032] 1) Improve the stirring and entrainment effects in the injection space:

[0033] The plum-shaped nozzle makes the oxygen jet inject multi-dimensionally and disperse more evenly in the space, enhances the stirring and entrainment intensity in the space, can accelerate the reaction rate and mass transfer process of elements in the molten steel for steelmaking, helps to homogenize the composition and temperature of the molten steel, reduces the content of inclusions in the molten steel, improves the quality of the molten steel, improves the smelting efficiency, and shortens the smelting cycle. It can improve the diffusion combustion uniformity, improve the stirring and entrainment efficiency, and form a flameless combustion in the calcination and heating conditions.

[0034] 2) Improve the service life of the injection oxygen lance:

[0035] The oxygen lance structure with a plum-shaped nozzle has a stronger overall strength than the oxygen lance with a circular tube-shaped nozzle, has better stability under different fluid parameter injection conditions, is resistant to vibration and impact, and the turbulent and laminar intensities and the wall attachment effect change according to the working conditions, will not form dead corners, and will not be blocked due to accumulation and carbon deposition.

[0036] 3) Reduce the erosion of the furnace lining and furnace beam:

[0037] The dispersed multi-dimensional oxygen jet reduces the local erosion effect on the furnace lining and furnace beam, makes the erosion of the furnace lining and furnace beam become intermittent buffer and gentle and uniform, effectively prolongs the service life of the furnace lining and furnace beam, reduces potential accident hazards, and reduces production costs.

[0038] In the present invention, a transmission rod rotatable in an installation cavity is provided. The end of the transmission rod is connected to a toothed plate, driving the toothed plate to extend into an arc-shaped notch and engage with an outer ring plate, so as to realize the rotation of the baffle relative to the plum blossom guide plate through transmission; on the other end, a wind vane plate is used to drive the transmission rod to rotate. The wind vane plate refers to an existing fan, and its inclination angle is set, so as to control the required flow rate of a part and realize the rotation. The actual jet oxygen lance needs to be referred to for reference. The reset ring realizes the rotation of the transmission rod through a torsion spring and realizes the reset effect. A circumferential curve groove is set to reserve a rotation space and limit the limit position of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a cross-sectional schematic view of a jet oxygen lance according to Embodiment 1 of the present invention;

[0040] Figure 2 is a schematic connection structure diagram of a plum blossom tube-shaped part, a drainage channel and a plum blossom guiding port of the present invention;

[0041] Figure 3 is a cross-sectional schematic view of a jet oxygen lance of the present invention (without installing a plum blossom tube-shaped part, a drainage channel and a plum blossom guiding port);

[0042] Figure 4 is a schematic view of the jet oxygen lance of the present invention installed on a smelting furnace;

[0043] Figure 5 is a schematic view of the outlet of the jet oxygen lance of the present invention installed on a smelting furnace;

[0044] Figure 6 is a cross-sectional schematic view of a jet oxygen lance according to Embodiment 2 of the present invention;

[0045] Figure 7 is Figure 6 an enlarged structural schematic view at A in;

[0046] Figure 8 is Figure 6 an enlarged structural schematic view at B in;

[0047] Figure 9 is a schematic structure diagram of a plum blossom tube-shaped part according to Embodiment 2 of the present invention;

[0048] Figure 10 is a schematic view of an integrated baffle and outer ring plate of the present invention;

[0049] Figure 11 is a cross-sectional schematic view of a jet oxygen lance according to Embodiment 3 of the present invention;

[0050] Figure 12 is Figure 11 an enlarged view of part C of;

[0051] Figure 13Front schematic view of the wind blade plate of the present invention;

[0052] In the figure:

[0053] 1. Oxygen lance body; 2. Gas channel; 3. Water-cooling channel; 4. Muzzle part;

[0054] 5. Plum blossom tube-shaped part; 51. Petal notch one; 52. Straight part; 53. Plum blossom guide plate; 54. Baffle plate; 55. Arc notch; 56. Outer ring plate; 57. Large-diameter part;

[0055] 6. Drainage channel;

[0056] 7. Plum blossom guiding port; 71. Petal notch two;

[0057] 8. Toothed plate; 9. Installation cavity;

[0058] 10. Transmission rod; 101. Limit plate two; 102. Friction pad two;

[0059] 11. Wind blade plate; 111. Side pressing strip; 112. Necking part; 113. Friction pad one; 114. Limit plate one;

[0060] 12. Reset ring; 121. Ring body shell; 122. Torsion spring; 123. Annular curve groove;

[0061] 13. Connecting bearing one; 14. Connecting bearing two. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] Embodiment 1

[0064] Please refer to Figures 1 - 5 , a technical solution provided by the present invention is provided. Specifically, it includes a jet oxygen lance with a plum blossom-shaped nozzle, including an oxygen lance body 1, in which a gas channel 2 and a water-cooling channel 3 are respectively arranged; a muzzle part 4 is arranged at the end of the oxygen lance body 1, the orifice 4 is communicated with the gas channel 2, and a water-cooling channel 3 is arranged around the outside of the gas channel 2;

[0065] A plum blossom tube-shaped part 5 and a drainage channel 6 are installed in the muzzle part 4. The plum blossom tube-shaped part 5 is fixed in the muzzle part 4 and is communicated with the drainage channel 6. One end of the drainage channel 6 far from the plum blossom tube-shaped part 5 is provided with a plum blossom guiding port 7. One end of the plum blossom tube-shaped part 5 far from the gas channel 2 is a plum blossom-shaped nozzle. A petal notch one 51 is formed on the plum blossom-shaped nozzle. A petal notch two 71 is arranged on the plum blossom guiding port 7. The petal notch one 51 and the petal notch two 71 are connected in a staggered manner, and the connecting line forms an angle of 0-15° with the central axis of the gas channel 2. Limiting the angle can ensure that the air outlet track after the air flow rotates out of the plum blossom tube-shaped part is spiral outward, and the dispersion range and angle are limited. A stepped notch is arranged in the muzzle part 4, and the stepped notch is suitable for abutting against the plum blossom tube-shaped part 5. The plum blossom tube-shaped part 5 is provided with 5 petals, and the structure of the gas channel 2 is a Laval nozzle structure.

[0066] Advantages of setting the plum blossom-shaped structure: Control of the gas flow state characteristics in the plum blossom-shaped tube.

[0067] A. Turbulent flow: In the plum blossom-shaped tube, when the gas pressure and flow rate are relatively high, turbulent flow may occur. At this time, the gas streamline is disordered and in a vortex state. The gas flow is mainly dominated by inertial force, and the generation and disappearance of the vortex at different positions can be controlled according to the working conditions by the coupling adjustment of the flow rate, flow velocity and pressure, with different characteristics and frequencies.

[0068] B. Viscous flow: When the gas pressure is relatively high and the flow rate is relatively small, viscous flow will occur in the plum blossom-shaped tube. The gas flow is mainly affected by internal friction force, and the flow direction is basically straight. At this time, the gas flow velocity is relatively slow at the edges and corners of the plum blossom-shaped tube, while the flow velocity in the central area is relatively fast and the flow layers of the gas are distinct. This characteristic is used as the control basis when the heating load needs to be remotely increased.

[0069] C. Molecular flow: When the pressure in the plum blossom-shaped tube is very low, the mean free path of gas molecules in the air flow is much larger than the characteristic size of the pipeline, and molecular flow will occur. At this time, the collision between gas molecules can be ignored, and the collision between molecules and the pipe wall is frequent. The molecules move along the pipeline in a thermal motion and pass through the pipeline independently. In each "petal" area and the center of the plum blossom shape, the movement of molecules is relatively uniform, and there is no obvious difference in the flow layers. It is the basis for improving the heating load in the near area.

[0070] D. Viscous-molecular flow: When the pressure is in an intermediate state, viscous-molecular flow will occur in the plum blossom-shaped tube. At this time, the gas flow has some characteristics of viscous flow, with certain flow layers and internal friction force, and some characteristics of molecular flow, which is for normal operation.

[0071] Nozzle manufacturing process: The plum-blossom-shaped nozzle is manufactured by adopting an advanced precision casting process to ensure the dimensional accuracy and shape accuracy of the nozzle holes; by making precise molds and using high-quality high-temperature alloy casting materials, the overall quality of the nozzle and the forming quality of the nozzle holes are guaranteed.

[0072] Refractory prefabricated parts that ensure the dimensional accuracy and shape accuracy of the nozzle holes can be made according to the actual situation of the heating furnace, and a combined spray gun can be made; including making an extended prefabricated nozzle brick that meets the requirements of the insertion depth of the oxygen lance in the rotary kiln with high-performance refractory materials to form a jet oxygen lance. Calibrate debugging parameters such as oxygen flow rate and pressure to achieve the best use effect.

[0073] Embodiment 2

[0074] As Figures 6 - 10 shown, this is another implementation scheme of the present invention. On the basis of Embodiment 1, in order to make the area of the plum-blossom outlet of the plum-blossom tube-shaped part adjustable;

[0075] As Figure 9 shown, the plum-blossom tube-shaped part 5 is cylindrical and includes a large-diameter part 57 and a straight part 52. A plum-blossom guide plate 53 is installed in the large-diameter part 57, and a plum-blossom-shaped groove is opened on the plum-blossom guide plate 53; a conical surface transition is provided between the large-diameter part 57 and the straight part 52;

[0076] A blocking plate 54 is installed in the large-diameter part 57. The blocking plate 54 is on the side of the plum-blossom guide plate 53 away from the gas channel 2. An adjusting structure is installed outside the blocking plate 54. The adjusting structure is suitable for driving the blocking plate 54 to rotate outside the plum-blossom guide plate 53 and blocking the flow area of the plum-blossom guide plate 53.

[0077] As Figure 9 shown, an arc-shaped notch 55 is opened on the large-diameter part 57. An outer ring plate 56 is installed in the arc-shaped notch 55. A first tooth surface is provided outside the outer ring plate 56. A toothed plate 8 is installed outside the outer ring plate 56 in an external meshing manner. The toothed plate 8 is as Figure 10 shown, and the toothed plate 8 is located outside the large-diameter part 57; the outer ring plate 56 is integrally connected with the blocking plate 54; combining Figure 6 and Figure 7 shown, an installation cavity 9 is further provided in the oxygen lance main body 1, and the toothed plate 8 is installed in the installation cavity 9;

[0078] The toothed plate 8 is coaxially installed with a transmission rod 10, and a driving structure is installed at the end of the transmission rod 10 away from the toothed plate 8.

[0079] The driving structure includes a wind vane plate 11. One end of the wind vane plate 11 is connected to the transmission rod 10; the wind vane plate 11 is suitable for rotating in the gas channel 2 with the compression of oxygen;

[0080] The installation cavity 9 is provided with a stepped surface, on which a reset ring 12 is installed. The reset ring 12 is fixedly installed on the stepped surface and sleeved on the transmission rod 10. The reset ring 12 is adapted to drive the transmission rod 10 to rotate and reset.

[0081] Both ends of the transmission rod 10 are provided with stepped surfaces, and a connecting bearing one 13 and a connecting bearing two 14 are respectively installed. The outer rings of the connecting bearing one 13 and the connecting bearing two 14 are connected to the inner wall of the installation cavity 9; and the inner rings are fixedly connected to the transmission rod 10 at the corresponding positions.

[0082] As Figure 8 shown, a cross-sectional view of the reset ring is shown. The reset ring 12 includes a ring body shell 121, and a torsion spring 122 is installed inside the ring body shell 121. One end of the torsion spring 122 is fixedly connected inside the ring body shell 121; an annular curve groove 123 is opened inside the ring body shell 121, and the annular curve groove 123 is adapted for the torsion spring 122 to rotate; the other end of the torsion spring 122 is fixedly connected to the transmission rod 10. In a further technical solution, the inclination angle of the wind vane plate 11 is 3-8°, not shown in the figure, and a side pressure strip 111 is installed at the bottom of the wind vane plate 11.

[0083] In the present invention, by providing a transmission rod that can rotate in the installation cavity, the end of the transmission rod is connected to the toothed plate, driving the toothed plate to extend into the arc-shaped notch and engage with the outer ring plate, so as to drive the baffle plate to rotate relative to the plum blossom guide plate; the other end uses the wind vane plate to drive the transmission rod to rotate. The wind vane plate refers to the existing fan, and its inclination angle is set to control the required flow rate of a part, so as to realize the rotation. It needs to refer to the actual jet oxygen lance. The reset ring uses a torsion spring to realize the rotation of the transmission rod and achieve the reset effect, and an annular curve groove is set to reserve a rotation space and limit the limit position of the torsion spring.

[0084] Embodiment 3

[0085] As Figures 11 - 13 shown, this is another implementation scheme of the present invention. On the basis of Embodiment 2, a use method of a jet oxygen lance with a plum blossom-shaped nozzle includes the following steps:

[0086] Step 1, for the assembled jet oxygen lance, a plurality of water cooling channels 3 are opened outside its gas channel 2, and a pressurized water pipe is installed outside, and multiple groups of water cooling channels 3 are connected end to end;

[0087] Step 2: Introduce oxygen at a flow rate of 0 - a, where a is the limiting flow velocity for driving the wind vane 11, and the specific flow rate needs to be determined according to the corresponding actual requirements. A position bearing 13 is installed between the wind vane 11 and the transmission rod 10. The inner ring of the position bearing 13 is fixedly connected to the transmission rod 10, and the outer ring of the position bearing 13 is fixedly connected to the wind vane 11. Limiting plates one 114 are installed on both sides of the wind vane 11, and a limiting plate two 101 is installed on the transmission rod 10. The limiting plate one 114 and the limiting plate two 101 are adapted to be in movable abutment.

[0088] Among them, at the outlet of the wind vane Figure 13 As shown, a necking portion 112 is provided on the wind vane 11, and the necking portion 112 is adapted to extend from the installation cavity 9 to the gas channel 2. A friction pad one 113 is installed on the necking portion 112, and the friction pad is located between the limiting plate one 114 and the transmission rod 10. A friction pad two 102 is also provided on the transmission rod 10, and the friction pad one 113 and the friction pad two 102 rotate by friction.

[0089] The air flow passes through the plum blossom guiding port 7, changes from a straight-line advance to a curved distribution advance, and exits from the plum blossom-shaped groove, reducing the aggregation effect of the outlet air.

[0090] Step 3: Adjust the air flow size. When the introduced oxygen flow rate is greater than a, drive the wind vane 11 to rotate until the limiting plate one 114 abuts against the limiting plate two 101, and realize the rotation of the wind vane 11 driving the transmission rod 10 to rotate in the installation cavity 9. The rotation of the transmission rod 10 drives the torsion spring 122 to rotate.

[0091] The rotation of the transmission rod 10 drives the toothed plate 8 to engage and drive the outer ring plate 56 to rotate, and the outer ring plate 56 drives the blocking plate 54 to rotate, thereby reducing the flow area of the plum blossom tube part 5, and thus realizing the adjustment of the outlet oxygen speed and outlet direction.

[0092] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0093] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A jet oxygen lance with a plum blossom-shaped nozzle, characterized in that, It includes an oxygen lance body (1), and a gas channel (2) and a water-cooling channel (3) are respectively arranged inside the oxygen lance body (1); a muzzle part (4) is arranged at the end of the oxygen lance body (1), the muzzle part (4) is communicated with the gas channel (2), and the water-cooling channel (3) is arranged around the outside of the gas channel (2); A plum blossom tube-shaped part (5) and a drainage channel (6) are installed inside the muzzle part (4), the plum blossom tube-shaped part (5) is fixed inside the muzzle part (4) and is communicated with the drainage channel (6), and a plum blossom guiding port (7) is arranged at one end of the drainage channel (6) far away from the plum blossom tube-shaped part (5); one end of the plum blossom tube-shaped part (5) far away from the gas channel (2) is a plum blossom-shaped nozzle, a petal notch one (51) is arranged on the plum blossom-shaped nozzle, a petal notch two (71) is arranged on the plum blossom guiding port (7), the petal notch one (51) and the petal notch two (71) are connected in a staggered manner and the connecting line forms an angle of 0-15° with the central axis of the gas channel (2).

2. The jet oxygen lance with a plum blossom-shaped nozzle according to claim 1, characterized in that, A stepped notch is arranged inside the muzzle part (4), and the stepped notch is suitable for abutting against the plum blossom tube-shaped part (5); The plum blossom tube-shaped part (5) has 5 petals, and the structure of the gas channel (2) is a Laval nozzle structure.

3. The jet oxygen lance with a plum blossom-shaped nozzle according to claim 1, characterized in that, The plum blossom tube-shaped part (5) is cylindrical and includes a large-diameter part (57) and a straight part (52), a plum blossom guiding plate (53) is installed inside the large-diameter part (57), and a plum blossom-shaped groove is arranged on the plum blossom guiding plate (53); a conical surface transition is arranged between the large-diameter part (57) and the straight part (52); A blocking plate (54) is installed inside the large-diameter part (57), the blocking plate (54) is on the side of the plum blossom guiding plate (53) far away from the gas channel (2), an adjusting structure is installed outside the blocking plate (54), and the adjusting structure is suitable for driving the blocking plate (54) to rotate outside the plum blossom guiding plate (53) and blocking the flow area of the plum blossom guiding plate (53).

4. The jet oxygen lance with a plum blossom-shaped nozzle according to claim 3, characterized in that, An arc-shaped notch (55) is arranged on the large-diameter part (57), an outer ring plate (56) is installed inside the arc-shaped notch (55), a tooth surface one is arranged outside the outer ring plate (56), a toothed plate (8) is installed outside the outer ring plate (56) in an external meshing manner, and the toothed plate (8) is located outside the large-diameter part (57); the outer ring plate (56) is integrally connected with the blocking plate (54); An installation cavity (9) is further arranged inside the oxygen lance body (1), and the toothed plate (8) is installed inside the installation cavity (9); The toothed plate (8) is coaxially installed with a transmission rod (10), and a driving structure is installed at one end of the transmission rod (10) far away from the toothed plate (8).

5. The jet oxygen lance with a plum blossom-shaped nozzle according to claim 4, characterized in that, The driving structure includes a wind vane plate (11), and one end of the wind vane plate (11) is connected with the transmission rod (10); The wind vane plate (11) is suitable for rotating in the gas channel (2) along with the compression of oxygen; A stepped surface is arranged on the installation cavity (9), and a reset ring (12) is installed on the stepped surface. The reset ring (12) is fixedly installed on the stepped surface and sleeved on the transmission rod (10), and the reset ring (12) is suitable for driving the transmission rod (10) to rotate and reset.

6. The jet oxygen lance with a plum-blossom-shaped nozzle according to claim 5, characterized in that, Both ends of the transmission rod (10) are provided with stepped surfaces, and a first connecting bearing (13) and a second connecting bearing (14) are respectively installed. The outer rings of the first connecting bearing (13) and the second connecting bearing (14) are both connected to the inner wall of the installation cavity (9); and the inner rings are both fixedly connected to the transmission rod (10) at the corresponding positions.

7. The jet oxygen lance with a plum-blossom-shaped nozzle according to claim 5, characterized in that, The reset ring (12) includes a ring body shell (121), and a torsion spring (122) is installed inside the ring body shell (121). One end of the torsion spring (122) is fixedly connected inside the ring body shell (121); An annular curve groove (123) is formed inside the ring body shell (121), and the annular curve groove (123) is suitable for the torsion spring (122) to rotate; The other end of the torsion spring (122) is fixedly connected to the transmission rod (10).

8. The jet oxygen lance with a plum-blossom-shaped nozzle according to claim 5, characterized in that, The inclination angle of the wind vane plate (11) is 3-8°, and a side pressure strip (111) is installed at the bottom of the wind vane plate (11).

9. A method for using a jet oxygen lance with a plum blossom-shaped nozzle, characterized in that, It includes the following steps: Step 1, for the assembled jet oxygen lance, a plurality of water cooling channels (3) are formed outside its gas channel (2), and a pressurized water pipe is installed outside, and the multiple groups of water cooling channels (3) are connected end to end; Step 2, introduce oxygen with a flow rate of 0-a, where a is the limit flow rate for driving the wind vane plate (11); wherein, a position bearing (13) is installed between the wind vane plate (11) and the transmission rod (10), and the inner ring of the position bearing (13) is fixedly connected to the transmission rod (10), and the outer ring of the position bearing (13) is fixedly connected to the wind vane plate (11); Limit plates one (114) are installed on both sides of the wind vane plate (11), and a limit plate two (101) is installed on the transmission rod (10); The limit plate one (114) and the limit plate two (101) are suitable for movable abutment; Wherein a necking part (112) is provided on the wind vane plate (11), and the necking part (112) is suitable for extending from the installation cavity (9) into the gas channel (2); A friction pad one (113) is installed on the necking part (112), and the friction pad is located between the limit plate one (114) and the transmission rod (10); A friction pad two (102) is also provided on the transmission rod (10), and the friction pad one (113) and the friction pad two (102) rotate by friction; The air flow passes through the plum blossom guiding port (7), advances from a straight line to a curve distribution, and exits from the plum blossom-shaped groove, reducing the aggregation effect of the outlet air; Step 3, adjust the air flow size. When the introduced oxygen flow rate is greater than a, drive the wind vane plate (11) to rotate until the limit plate one (114) abuts against the limit plate two (101), and realize the rotation of the wind vane plate (11) driving the transmission rod (10) to rotate in the installation cavity (9), and the rotation of the transmission rod (10) drives the torsion spring (122) to rotate; The rotation of the transmission rod (10) drives the toothed plate (8) to engage and drive the outer ring plate (56) to rotate, and the outer ring plate (56) drives the blocking plate (54) to rotate, thereby reducing the flow area of the plum blossom pipe part (5), thereby realizing the adjustment of the outlet oxygen speed and the outlet direction.

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