Novel sealing assembly oxygen lance capable of preventing gas mixing

Abstract

The utility model belongs to the technical field of steelmaking equipment, and discloses a novel gas-mixing-preventing sealing assembly oxygen lance. The utility model relates to a novel gas-mixing-preventing sealing assembly oxygen lance which can be detachably connected with an electric arc furnace. The oxygen lance comprises a copper head, an outer pipe, an inner pipe, a lance core, a gas inlet assembly, a water return connector assembly, a water inlet connector, an epoxy connector assembly, a fuel gas connector, a first flange 10, a lance rear portion, a fuel gas connector assembly, a second flange, an epoxy connector, a water inlet connector assembly, a water return connector, a gas inlet connector and a separation nozzle. According to the utility model, the separation among epoxy, natural gas and fuel gas is ensured, the mutual mixing of media is avoided, and the occurrence of faults of the oxygen lance is reduced. All parts are tightly connected, so that the stability and the reliability of the oxygen lance are ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of steelmaking equipment, and in particular relates to a novel sealed assembly oxygen lance to prevent gas mixing. Background Technology

[0002] In traditional steelmaking processes, the oxygen lance, as a crucial device for blowing oxygen into the molten pool, directly impacts the efficiency and quality of steelmaking. However, traditional oxygen lances have certain structural design flaws, making them prone to media cross-contamination. This means that oxygen, fuel gas, and other media can easily mix during transmission, which not only reduces combustion efficiency but can also lead to internal combustion or damage to the equipment. For example, the lance core frequently burns out during use. Subsequent research and analysis revealed that the lance core burnout is caused by the mixing of natural gas and oxygen within the lance, further increasing the failure rate and maintenance costs.

[0003] Furthermore, existing oxygen lances suffer from insufficient combustion intensity, resulting in unsatisfactory decarburization and heating effects in molten steel, thus impacting steelmaking efficiency. Third, when operating in high-temperature environments, the cooling system of the oxygen lance is often ineffective, easily leading to overheating and shortening its lifespan.

[0004] Therefore, there is an urgent need to design a new oxygen lance structure to solve these problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of sealed assembly oxygen lance that prevents gas mixing.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A novel sealed oxygen lance designed to prevent gas mixing is disclosed. The oxygen lance can be detachably connected to an electric arc furnace. The oxygen lance includes a copper head, an outer tube, an inner tube, a lance core, an air inlet assembly, a water return interface assembly, a water inlet interface, an epoxy interface assembly, a gas interface, a first flange, a lance rear section, a gas interface assembly, a second flange, an epoxy interface, a water inlet interface assembly, a water return interface, an air inlet, and a separating nozzle.

[0008] The gun core is arranged horizontally and is cylindrical in shape. It is hollow inside and open at both horizontal ends. One horizontal end of the gun core is tightly coaxially connected to the copper head via a separating nozzle. The copper head is arranged vertically, and the separating nozzle is arranged horizontally and is also tightly coaxially connected to the copper head and the gun core. The first flange and the rear of the gun are both arranged horizontally. The rear of the gun is tightly coaxially connected to the other horizontal end of the gun core via the first flange. The rear of the gun is hollow inside, and the hollow interiors of the rear of the gun and the gun core are tightly connected. One end of the hollow interior of the rear of the gun is tightly connected to the hollow interior of the gun core, and the other end of the hollow interior of the rear of the gun can be used to input oxygen.

[0009] The outer pipe, inner pipe, and gas inner pipe are all arranged in a horizontal direction, and the horizontal side of the outer pipe is tightly coaxially connected to the copper head and the separator nozzle.

[0010] The outer tube, inner tube, and gas inner tube are all horizontally and coaxially connected to the separator nozzle on the same side, and this horizontal side is close to the copper head. The gun core, gas inner tube, inner tube, and outer tube are coaxially and tightly fitted together from the inside to the outside. The horizontal side of the gas inner tube away from the copper head is connected to the gas interface assembly. The gas interface assembly is coaxially and tightly fitted outside the gas inner tube, and the gas interface is tightly connected to the gas interface assembly. The gas interface allows gas to flow into the gas interface assembly. A gas inlet is connected to the gas inner tube inside the gas interface assembly. The gas inlet is connected to the gun core and gas inner tube. The gas cavities between the two are tightly connected, and the gas introduced through the gas interface can enter the spaced cavity between the gun core and the gas inner tube through the gas inlet; the other side of the inner tube away from the copper head is connected to the epoxy interface assembly, the epoxy interface assembly is coaxially and tightly fitted outside the gas inner tube and tightly connected to the inner tube, the epoxy interface is tightly connected to the epoxy interface assembly, the epoxy interface can introduce auxiliary oxygen into the epoxy interface assembly, the introduced auxiliary oxygen can be tightly connected to the epoxy cavity between the inner tube and the gas inner tube, and the introduced auxiliary oxygen can enter the spaced cavity between the inner tube and the gas inner tube;

[0011] The outer tube includes an outer shell, a return water pipe, an inlet water pipe, and a water-resistant baffle. The inlet water pipe, return water pipe, and air inlet pipe are all horizontally arranged and are coaxially and tightly fitted together from the inside out. The water-resistant baffle is vertically arranged and horizontally spaced from the copper head. The horizontal ends of the inlet water pipe and return water pipe are connected via the water-resistant baffle. The horizontal side of the inlet water pipe, away from the copper head, is connected to the inlet interface assembly. The inlet interface is tightly connected to the inlet interface assembly, allowing cooling water to flow into it. The inlet interface is connected to the inner tube and the inlet water pipe. The water inlet cavity between the two is tightly connected. The return water pipe is connected to the return water interface assembly on the horizontal side away from the copper head. The return water interface is tightly connected to the return water interface assembly and can allow cooling water to flow into the return water interface assembly. The return water interface is tightly connected to the water inlet cavity between the return water pipe and the water inlet pipe. The outer shell of the outer pipe is connected to the air inlet interface assembly on the horizontal side away from the copper head. The air inlet interface is tightly connected to the air inlet interface assembly and can allow natural gas to flow into the air inlet interface assembly. The air inlet interface is connected to the air inlet cavity between the air inlet pipe and the return water pipe and the outer shell of the outer pipe.

[0012] The separating nozzle can separate and eject the substances that converge from the air intake cavity, epoxy cavity, gas cavity, and gun core into the separating nozzle.

[0013] The return water interface assembly, air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all arranged horizontally and are coaxially and tightly connected in sequence along the horizontal direction. The air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all coaxially and tightly fitted outside the gun core, and are all spaced apart from the outer surface of the gun core. The return water interface assembly is coaxially and tightly fitted onto the outer surface of the gun core. The gas interface assembly and the epoxy interface assembly are tightly connected through a second flange.

[0014] The return water interface and epoxy interface are both set horizontally, while the air inlet interface, water inlet interface and gas interface are all set vertically. The return water interface, epoxy interface, air inlet interface, water inlet interface and gas interface are all set perpendicular to the gun core.

[0015] Furthermore, a cavity for the return water interface assembly, an air inlet interface assembly, an epoxy interface assembly, a gas interface assembly, and a water inlet interface assembly is provided between the return water interface assembly, the air inlet interface assembly, the epoxy interface assembly, the gas interface assembly, and the water inlet interface assembly and the gun core.

[0016] The advantages and positive effects of this utility model are as follows:

[0017] 1. By employing a mixed combustion system of primary oxygen and fuel gas, along with auxiliary combustion of secondary oxygen and natural gas, a multi-stage combustion enhancement effect is achieved. This structure optimizes the decarburization and heating efficiency of molten steel, significantly improving the overall efficiency of the steelmaking process.

[0018] 2. The design of separating the first flange and the second flange strictly isolates the oxygen, natural gas and gas passages, avoiding internal combustion or gun core burnout caused by medium mixing, and significantly reducing the failure rate and maintenance costs.

[0019] 3. The cooling water circulation between the first and second water-cooling pipes provides uniform cooling to the lance core, inner tube, and outer tube, effectively controlling the internal temperature of the device and preventing component aging or damage caused by high temperature, thereby extending the service life of the oxygen lance.

[0020] 4. All components (such as copper head, separator nozzle, and interface assembly) adopt a coaxial and tightly connected design, combined with a layered assembly layout, to ensure airtightness and structural stability, and improve the oxygen lance's impact resistance and long-term reliability under high temperature and high pressure environments.

[0021] 5. The separator nozzle precisely separates and controls the injection paths and mixing ratios of fuel gas, main oxygen, auxiliary oxygen, and natural gas, enhancing combustion stability and intensity while reducing energy loss and ensuring a uniform and efficient combustion process.

[0022] 6. All media interfaces (gas, epoxy, cooling water, etc.) adopt a vertical and horizontal layout, and are connected with standardized flanges, which facilitates quick installation, disassembly and maintenance, reducing operational complexity and downtime. Attached Figure Description

[0023] Figure 1 This is a schematic front sectional view of a structural connection according to the present invention;

[0024] Figure 2 for Figure 1 Another structural connection diagram;

[0025] Figure 3 for Figure 2 A top view of a structural connection;

[0026] Figure 4 for Figure 1 Enlarged schematic diagram of the structural connection of section A in the middle;

[0027] Figure 5 for Figure 1 Enlarged schematic diagram of a partial structural connection in section B;

[0028] Figure 6 for Figure 1 A magnified schematic diagram of the connection of another part of the structure in section B. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0030] Unless otherwise specified, the raw materials used in this invention are all commercially available products. Unless otherwise specified, the methods used in this invention are conventional methods in the field. The quantities of all substances used in this invention are conventional usage quantities. Structures and connections not described in detail in this invention can be understood as conventional technical means in the field.

[0031] A novel sealed oxygen lance designed to prevent gas mixing, which can be detachably connected to an electric arc furnace (not shown in the figure), such as... Figures 1 to 6 As shown, the oxygen lance includes a copper head 1, an outer tube 2, an inner tube 3, a lance core 4, an air inlet assembly 5, a water return interface assembly 6, a water inlet interface 7, an epoxy interface assembly 8, a gas interface 9, a first flange 10, a lance rear part 11, a gas interface assembly 12, a second flange 13, an epoxy interface 14, a water inlet interface assembly 15, a water return interface 16, an air inlet interface 17, and a separating nozzle 18;

[0032] The gun core is arranged horizontally and is cylindrical in shape. It is hollow inside and open at both horizontal ends. One horizontal end of the gun core is tightly coaxially connected to the copper head via a separating nozzle. The copper head is arranged vertically, and the separating nozzle is arranged horizontally and is also tightly coaxially connected to the copper head and the gun core. The first flange and the rear part of the gun are both arranged horizontally. The rear part of the gun is tightly coaxially connected to the other horizontal end of the gun core via the first flange. The rear part of the gun is hollow inside, and the hollow interiors of the rear part and the gun core are tightly connected. One end of the hollow interior of the rear part is tightly connected to the hollow interior of the gun core, and the other end of the hollow interior of the rear part can be used to input oxygen, allowing the rear part to supply oxygen to the gun core. The tightly connected structure ensures that oxygen does not leak.

[0033] The outer pipe, inner pipe, and gas inner pipe are all arranged in a horizontal direction, and the horizontal side of the outer pipe is tightly coaxially connected to the copper head and the separator nozzle.

[0034] The outer tube, inner tube, and gas inner tube are all horizontally and coaxially connected to the separator nozzle on the same side, and this horizontal side is close to the copper head. The gun core, gas inner tube, inner tube, and outer tube are coaxially and tightly fitted together from the inside to the outside. The horizontal side of the gas inner tube away from the copper head is connected to the gas interface assembly. The gas interface assembly is coaxially and tightly fitted outside the gas inner tube, and the gas interface is tightly connected to the gas interface assembly. The gas interface can supply gas into the gas interface assembly. A gas inlet 12-2 is connected to the gas inner tube inside the gas interface assembly. The gas inlet is tightly connected to the gas cavity 3-1 between the gun core and the gas inner tube. The gas supplied through the gas interface can enter through the gas inlet. The gas is inserted into the cavity between the nozzle core and the gas inner tube, allowing the gas turbine interface assembly to deliver gas into the gas inner tube, and then the gas can be delivered to the separator nozzle through the gas cavity. The other side of the inner tube away from the copper head is connected to the epoxy interface assembly. The epoxy interface assembly is coaxially and tightly fitted outside the gas inner tube and tightly connected to the inner tube. The epoxy interface is tightly connected to the epoxy interface assembly. The epoxy interface can introduce auxiliary oxygen into the epoxy interface assembly. The introduced auxiliary oxygen can be tightly connected to the epoxy cavity 14-1 between the inner tube and the gas inner tube. The introduced auxiliary oxygen can enter the cavity between the inner tube and the gas inner tube, and then the auxiliary oxygen can be delivered to the separator nozzle through the epoxy cavity.

[0035] The outer tube includes an outer shell 2-1, a return water pipe 2-2, an inlet water pipe 2-3, and a water-blocking baffle 2-4. The inlet water pipe, return water pipe, and air inlet pipe are all horizontally arranged and are coaxially and tightly spaced together from the inside out. The water-blocking baffle is vertically arranged and horizontally spaced from the copper head. The horizontal ends of the inlet water pipe and return water pipe are connected through the water-blocking baffle. The horizontal side of the inlet water pipe away from the copper head is connected to the inlet interface assembly. The inlet interface is tightly connected to the inlet interface assembly, allowing cooling water to flow into it. The inlet interface is tightly connected to the inlet cavity 2-7 between the inner tube and the inlet water pipe. The return water pipe is away from the copper head. The other horizontal side is connected to the return water interface assembly. The return water interface is tightly connected to the return water interface assembly. Cooling water can be introduced into the return water interface assembly. The return water interface is tightly connected to the return water cavity 2-6 between the return water interface and the inlet water pipe and the return water pipe, so that the cooling water flows in the return water cavity and the inlet water cavity to cool the device. The other horizontal side of the outer tube shell is connected to the air inlet interface assembly. The air inlet interface is tightly connected to the air inlet interface assembly. Natural gas can be introduced into the air inlet interface assembly. The air inlet interface is connected to the return water pipe and the air inlet cavity 2-5 between the air inlet interface and the outer tube shell, so that natural gas can be delivered to the separator nozzle through the air inlet cavity.

[0036] The separating nozzle can separate and spray the substances that converge from the air intake cavity, epoxy cavity, gas cavity and gun core into the separating nozzle, thereby improving the stability and intensity of combustion.

[0037] The return water interface assembly, air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all arranged horizontally and are coaxially and tightly connected in sequence along the horizontal direction to ensure the airtightness of the oxygen lance. The air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all coaxially and tightly fitted outside the lance core and are spaced apart from the outer surface of the lance core. The return water interface assembly is coaxially and tightly fitted onto the outer surface of the lance core. The gas interface assembly and the epoxy interface assembly are tightly connected through a second flange.

[0038] The return water interface and epoxy interface are both set in the horizontal direction, while the air inlet interface, water inlet interface and gas interface are all set in the vertical direction. The return water interface, epoxy interface, air inlet interface, water inlet interface and gas interface are all set perpendicular to the gun core.

[0039] In use, the return water interface, air inlet interface, water inlet interface, epoxy interface, and gas interface are all connected to the corresponding pipelines. Upon starting the device, the main oxygen is delivered to the nozzle core through the rear of the nozzle, the auxiliary oxygen enters the inner tube through the epoxy interface, the natural gas is transmitted to the outer tube through the air inlet interface, and the gas is input into the inner tube through the gas interface. Then, at the separating nozzle, the main oxygen and gas mix and ignite, while the auxiliary oxygen and natural gas assist in combustion, increasing the combustion intensity. Cooling water circulates in the inlet and return water pipes through the return water interface and the water inlet interface, cooling the outer tube, inner tube, and nozzle core to ensure stable internal temperature. The second flange and the first flange prevent the epoxy and natural gas from mixing with the gas, thus preventing combustion damage to the device at the end of the assembly. This eliminates media cross-contamination, reduces oxygen gun malfunctions, and improves the service life of the nozzle core.

[0040] This invention significantly improves combustion intensity and enhances the working efficiency of the oxygen lance by using the mixed combustion of primary oxygen and fuel gas, and the auxiliary combustion of secondary oxygen and natural gas. The cooling water circulation through the first and second baffle pipes effectively cools the outer and inner pipes and the lance core, ensuring stable internal temperature and extending the equipment's service life. The design of the second and first flanges ensures the separation of epoxy, natural gas, and fuel gas, preventing cross-contamination and reducing oxygen lance malfunctions. Tight connections between all components ensure the stability and reliability of the oxygen lance.

[0041] In this embodiment, the return water interface assembly, air inlet interface assembly, epoxy interface assembly, gas interface assembly, and water inlet interface assembly are provided with return water interface assembly cavity 6-1, air inlet interface assembly cavity 5-1, epoxy interface assembly cavity 8-1, gas interface assembly cavity 12-1, and water inlet interface assembly cavity 15-1 between the water return interface assembly, air inlet interface assembly cavity 5-1, epoxy interface assembly cavity 8-1, gas interface assembly cavity 12-1, and water inlet interface assembly cavity 15-1 between the water return interface assembly, air inlet interface assembly cavity 5-1, gas inlet interface assembly cavity 8-1, gas inlet ...

[0042] Although embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments.

Claims

1. A novel sealed oxygen lance designed to prevent gas mixing, the oxygen lance being detachably connected to an electric arc furnace, characterized in that: The oxygen lance includes a copper head, an outer tube, an inner tube, a lance core, an air inlet assembly, a water return interface assembly, a water inlet, an epoxy interface assembly, a gas interface, a first flange, a lance rear section, a gas interface assembly, a second flange, an epoxy interface, a water inlet assembly, a water return, an air inlet, and a separating nozzle. The gun core is arranged horizontally and is cylindrical in shape. It is hollow inside and open at both horizontal ends. One horizontal end of the gun core is tightly coaxially connected to the copper head via a separating nozzle. The copper head is arranged vertically, and the separating nozzle is arranged horizontally and is also tightly coaxially connected to the copper head and the gun core. The first flange and the rear of the gun are both arranged horizontally. The rear of the gun is tightly coaxially connected to the other horizontal end of the gun core via the first flange. The rear of the gun is hollow inside, and the hollow interiors of the rear of the gun and the gun core are tightly connected. One end of the hollow interior of the rear of the gun is tightly connected to the hollow interior of the gun core, and the other end of the hollow interior of the rear of the gun can be used to input oxygen. The outer pipe, inner pipe, and gas inner pipe are all arranged in a horizontal direction, and the horizontal side of the outer pipe is tightly coaxially connected to the copper head and the separator nozzle. The outer tube, inner tube, and gas inner tube are all horizontally and coaxially connected to the separator nozzle on the same side, and this horizontal side is close to the copper head. The gun core, gas inner tube, inner tube, and outer tube are coaxially and tightly fitted together from the inside to the outside. The horizontal side of the gas inner tube away from the copper head is connected to the gas interface assembly. The gas interface assembly is coaxially and tightly fitted outside the gas inner tube, and the gas interface is tightly connected to the gas interface assembly. The gas interface allows gas to flow into the gas interface assembly. A gas inlet is connected to the gas inner tube inside the gas interface assembly. The gas inlet is connected to the gun core and gas inner tube. The gas cavities between the two are tightly connected, and the gas introduced through the gas interface can enter the spaced cavity between the gun core and the gas inner tube through the gas inlet; the other side of the inner tube away from the copper head is connected to the epoxy interface assembly, the epoxy interface assembly is coaxially and tightly fitted outside the gas inner tube and tightly connected to the inner tube, the epoxy interface is tightly connected to the epoxy interface assembly, the epoxy interface can introduce auxiliary oxygen into the epoxy interface assembly, the introduced auxiliary oxygen can be tightly connected to the epoxy cavity between the inner tube and the gas inner tube, and the introduced auxiliary oxygen can enter the spaced cavity between the inner tube and the gas inner tube; The outer tube includes an outer shell, a return water pipe, an inlet water pipe, and a water-resistant baffle. The inlet water pipe, return water pipe, and air inlet pipe are all horizontally arranged and are coaxially and tightly fitted together from the inside out. The water-resistant baffle is vertically arranged and horizontally spaced from the copper head. The horizontal ends of the inlet water pipe and return water pipe are connected via the water-resistant baffle. The horizontal side of the inlet water pipe, away from the copper head, is connected to the inlet interface assembly. The inlet interface is tightly connected to the inlet interface assembly, allowing cooling water to flow into it. The inlet interface is connected to the inner tube and the inlet water pipe. The water inlet cavity between the two is tightly connected. The return water pipe is connected to the return water interface assembly on the horizontal side away from the copper head. The return water interface is tightly connected to the return water interface assembly and can allow cooling water to flow into the return water interface assembly. The return water interface is tightly connected to the water inlet cavity between the return water pipe and the water inlet pipe. The outer shell of the outer pipe is connected to the air inlet interface assembly on the horizontal side away from the copper head. The air inlet interface is tightly connected to the air inlet interface assembly and can allow natural gas to flow into the air inlet interface assembly. The air inlet interface is connected to the air inlet cavity between the air inlet pipe and the return water pipe and the outer shell of the outer pipe. The separating nozzle can separate and eject the substances that converge from the air intake cavity, epoxy cavity, gas cavity, and gun core into the separating nozzle. The return water interface assembly, air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all arranged horizontally and are coaxially and tightly connected in sequence along the horizontal direction. The air inlet interface assembly, water inlet interface assembly, epoxy interface assembly, and gas interface assembly are all coaxially and tightly fitted outside the gun core, and are all spaced apart from the outer surface of the gun core. The return water interface assembly is coaxially and tightly fitted onto the outer surface of the gun core. The gas interface assembly and the epoxy interface assembly are tightly connected through a second flange. The return water interface and epoxy interface are both set horizontally, while the air inlet interface, water inlet interface and gas interface are all set vertically. The return water interface, epoxy interface, air inlet interface, water inlet interface and gas interface are all set perpendicular to the gun core.

2. The sealed assembly oxygen lance according to claim 1, characterized in that: The return water interface assembly, air inlet interface assembly, epoxy interface assembly, gas interface assembly, and water inlet interface assembly are provided with cavities for the return water interface assembly, air inlet interface assembly, epoxy interface assembly, gas interface assembly, and water inlet interface assembly between them and the gun core.

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