CN214361501U

CN214361501U - Large-flow enhanced furnace wall gun

Info

Publication number: CN214361501U
Application number: CN202120305227.2U
Authority: CN
Inventors: 泰德·桑丁
Original assignee: Tenova Technology Tianjin Co Ltd
Current assignee: Tenova Technology Tianjin Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-10-08
Anticipated expiration: 2031-02-03

Abstract

The utility model provides a large-flow enhanced furnace wall gun, which belongs to the field of electric arc furnaces and comprises a gun body, a gun core, a gun rear part, an inner nozzle and an outer nozzle which are integrally connected and arranged, wherein the gun rear part is arranged at the rear end of the gun body; the rifle core is including the inner tube and the outer tube of coaxial setting, and inner tube and outer tube are being close to the one end fixed connection of inner nozzle, and the two relative independent setting of the other end is equipped with first sealing washer between outer tube and the rifle rear portion, is equipped with the second sealing washer between inner tube and the rifle rear portion, and the relative rifle rear portion of inner tube carries out axial positioning through the circular bead. The utility model discloses satisfy the demand of large-traffic oxygen rifle tied in a bundle, inner tube, the outer tube of rifle core can be at radial relative movement at the rifle rear portion, overcome because of the rifle core that the body of a gun warp and lead to warp, the dismouting difficulty, sealed not tight, the tempering, explosion scheduling problem, the security is high.

Description

Large-flow enhanced furnace wall gun

Technical Field

The utility model belongs to the electric arc furnace field relates to large-traffic enhancement mode oven rifle.

Background

The market demand for electric arc furnaces has increased dramatically in recent years. In recent years, electric arc furnaces of different sizes are put into production in succession in China, and the continuous pursuit of yield and economic benefit prompts the tonnage of the newly put electric arc furnace to show a continuously increasing trend. The furnace wall gun is used as an indispensable important auxiliary device of the electric arc furnace, the oxygen supply capacity of the furnace wall gun directly influences the speed of electric furnace smelting, but the flow of the furnace wall oxygen gun on the existing market is basically below 3000Nm3/h, and the requirement of large-tonnage electric furnace smelting cannot be met. Simultaneously because the smelting rhythm is constantly accelerated, and the power of the transformer is constantly increased, the heat load to the furnace wall gun in the smelting process is constantly increased, and the mechanical impact to the furnace wall gun can be caused on the furnace wall gun because the scrap steel is smashed in the production process sometimes, the above factors cause the furnace wall gun to be easy to appear, the gun nozzle is burnt, the gun body is deformed, and then the internal gun core is deformed, the gun core is difficult to replace, meanwhile, the sealing ring between oxygen and natural gas is deformed easily to cause the stress deformation, the sealing is seriously, the oxygen and natural gas are mixed to be tempered, and the problems of explosion and the like occur. These problems have a great influence on the continuous stability of production and the safety of equipment and personnel.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide a large-traffic enhancement mode oven rifle, has solved above problem, satisfies the demand of large-traffic oxygen rifle tied in a bundle, and inner tube, the outer tube of rifle core can be at radial relative movement at the rifle rear portion, and the rifle core of overcoming leading to because of the rifle body warp is out of shape, and the dismouting difficulty is sealed not tight, the tempering, explosion scheduling problem, the security is high.

In order to solve the technical problem, the utility model discloses a technical scheme is: the large-flow enhanced furnace wall gun comprises a gun body, a gun core, a gun rear part, an inner nozzle and an outer nozzle which are integrally connected, wherein the gun rear part is arranged at the rear end of the gun body;

the rifle core is including the inner tube and the outer tube of coaxial setting, inner tube and outer tube are being close to the one end fixed connection of interior nozzle, the two relative independent settings of the other end, the outer tube with be equipped with first sealing washer between the rifle rear portion, the inner tube with be equipped with the second sealing washer between the rifle rear portion, the inner tube is relative the rifle rear portion carries out axial positioning through the circular bead.

Furthermore, one end, far away from the inner nozzle, of the inner pipe protrudes out of the outer pipe, a natural gas inlet is formed in the rear portion of the gun and is arranged between axial regions of the first sealing ring and the second sealing ring to form a natural gas circulation pipeline, and the inner diameter of the inner pipe is communicated with a main oxygen inlet in the rear portion of the gun.

Furthermore, an epoxy air inlet is arranged on the rear portion of the gun, the epoxy air inlet is arranged on one side, away from the second sealing ring, of the first sealing ring, and an epoxy air inlet channel is formed between the outer pipe and the inner wall of the gun body.

Furthermore, one ends of the inner pipe and the outer pipe, which are close to the inner nozzle, are welded and fixed through steel plates, and the steel plates are arranged between the outer wall of the inner pipe and the inner wall of the outer pipe and in the axial area which is close to the inner nozzle by 300mm-400 mm.

Furthermore, one end of the inner diameter of the inner nozzle, which is close to the inner pipe, is provided with a transition fillet.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

1. The utility model can satisfy the demand of large flow coherent oxygen lance from the entrance of the rear part of the oxygen lance to the exit of the nozzle of the lance body, and because the inner tube and the outer tube of the lance core can move relatively in the radial direction at the rear part, the problems of lance core deformation, difficult disassembly and assembly, poor sealing, tempering, explosion and the like caused by the deformation of the lance body can be overcome, and the safety is improved;

2. the utility model discloses because the import of main oxygen, natural gas and epoxy, the increase of intermediate channel and exit dimension makes and can reach bigger jetting flow under the same air supply pressure, inside and outside nozzle simultaneously, the increase of the whole wall thickness in rifle core and rifle rear portion for the life of these parts obviously increases, thereby makes new oxygen rifle also increase the life and the security of equipment when satisfying the large-tonnage electric arc furnace to big oxygen flow oxygen rifle demand.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a full cross-sectional view of the high flow enhanced wall lance of the present invention;

FIG. 2 is a detailed view of section A of FIG. 1 in accordance with the present invention;

FIG. 3 is a detailed view of section B of FIG. 1 in accordance with the present invention;

figure 4 is a cross-sectional view of the invention taken along line C-C of figure 1.

Reference numerals:

1. a gun body; 11. a shoulder; 12. a first seal ring; 16. a second seal ring; 2. a gun core; 21. an inner tube; 22. an outer tube; 3. the rear part of the gun; 4. an inner nozzle; 41. transition fillets; 5. an outer nozzle; 6. a primary oxygen inlet; 7. a natural gas inlet; 8. an epoxy air inlet; 9. and (3) a steel plate.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model relates to a large-flow enhanced furnace wall gun, which comprises a gun body 1, a gun core 2, a gun rear portion 3, an inner nozzle 4 and an outer nozzle 5 which are integrally connected and arranged, wherein the gun rear portion 3 is arranged at the rear end of the gun body 1, one end of the gun core 2 is fixed with the gun rear portion 3, the other end of the gun core extends into the gun body 1, one end of the gun core 2, which is far away from the gun rear portion 3, is internally provided with the inner nozzle 4, and the outer nozzle 5 is arranged outside;

the gun core 2 comprises an inner tube 21 and an outer tube 22 which are coaxially arranged, the inner tube 21 and the outer tube 22 are fixedly connected at one end close to the inner nozzle 4, the other end of the inner tube 21 and the other end of the outer tube 22 are oppositely and independently arranged, a first sealing ring 12 is arranged between the outer tube 22 and the gun rear portion 3, a second sealing ring 16 is arranged between the inner tube 21 and the gun rear portion 3, the inner tube 21 is axially positioned relative to the gun rear portion 3 through a shoulder 11, and the gun core is simple in structure and convenient to fix.

Preferably, one end of the inner pipe 21 far away from the inner nozzle 4 is arranged to protrude out of the outer pipe 22, the gun rear part 3 is provided with a natural gas inlet 7, the natural gas inlet 7 is arranged between the axial areas of the first sealing ring 12 and the second sealing ring 16 to form a natural gas circulation pipeline, and the inner diameter of the inner pipe 21 is communicated with the main oxygen inlet 6 of the gun rear part 3; more preferably, the gun rear portion 3 is provided with an epoxy inlet 8, the epoxy inlet 8 is arranged on one side of the first sealing ring 12 far away from the second sealing ring 16, and an epoxy inlet channel is formed between the outer tube 22 and the inner wall of the gun rear portion 3 to form respective channels, so that the stability is high.

Preferably, the inner tube 21 and the outer tube 22 are welded and fixed at one end close to the inner nozzle 4 through a steel plate 9, the steel plate 9 is arranged between the outer wall of the inner tube 21 and the inner wall of the outer tube 22 and is arranged in an axial area close to the inner nozzle by 300mm-400mm, one end of the inner tube 21 and one end of the outer tube 22 are fixed, and the stability of the structure is improved.

The rifle body 1 is compared traditional structure internal diameter and is increased, interior nozzle 4 and 5 flow ratios of outer nozzle promote by a wide margin originally and can reach 5000Nm3/h the most, and the wall thickness also is showing and increases, the wall thickness of 2 inner tubes 21 of rifle core and outer tube 22 increases, and the distance between 2 inner tubes 21 of rifle core and the outer tube 22 also increases, rifle rear portion 3, main oxygen, the air inlet of epoxy and natural gas is all than original big, and whole wall thickness also is than original thick, the bulk strength is showing and is increasing, simultaneously rifle core 2 possesses good flexibility again, make the reliability when the oxygen injection flow increases of new oven rifle, safety, life all promotes by a wide margin.

Preferably, one end of the inner diameter of the inner nozzle 4 close to the inner tube 21 is provided with a transition fillet 41, so that the air flow is smoother and less prone to disorder.

In the actual use process, main oxygen, natural gas and epoxy enter the oxygen lance through corresponding air inlets at the rear part 3 of the lance and are finally sprayed out from a nozzle of the oxygen lance through corresponding channels in the lance core 2, compared with the traditional oxygen lance structure, the inner diameter of the lance body 1 of the oxygen lance structure is increased, and therefore the area of available ventilation channels inside the lance body is increased; the inner diameter and the outer diameter of the inner nozzle 4 and the outer nozzle 5 are increased, the flow area is increased, the wall thickness is increased, and the strength is improved; the wall thickness and the through flow area of rifle core 2 have all been increased, and enhancement mode oxygen rifle core 2's natural gas air inlet 7 becomes complete opening by original inlet port, greatly increased the through flow area, the pressure drop that the import department produced has been reduced, rifle core 2 in this application adopts the design that the fixed rear portion of front portion was opened in addition, the relative outer tube 22 of inner tube 21 can change in the one end radial direction that is close to rifle rear portion 3 promptly, can beat about, make rifle core 2 rear portion inside and outside pipe 22 can radially relative movement, this design characteristics have solved effectively because of the rifle core 2 deformation that rifle body 1 warp and cause, a series of relevant problems such as rifle core 2 change difficulty, the stability and the security of equipment have also been improved simultaneously by a wide margin.

Compared with the traditional oxygen lance structure, the sizes of the main oxygen, natural gas and epoxy gas inlets 8 of the large-flow enhanced lance rear part 3 are increased, so that larger flow can be allowed without generating excessive pressure drop, and meanwhile, the wall thickness of the lance rear part 3 is also increased, so that the strength of the lance is larger, and the service life of the lance is longer.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The large-flow enhanced furnace wall gun is characterized in that: the gun comprises a gun body, a gun core, a gun rear part, an inner nozzle and an outer nozzle which are integrally connected, wherein the gun rear part is arranged at the rear end of the gun body;

2. The mass flow enhanced furnace wall lance of claim 1, wherein: one end of the inner pipe, which is far away from the inner nozzle, protrudes out of the outer pipe, a natural gas inlet is arranged on the rear portion of the gun and is arranged between axial areas of the first sealing ring and the second sealing ring to form a natural gas circulation pipeline, and the inner diameter of the inner pipe is communicated with a main oxygen inlet on the rear portion of the gun.

3. The mass flow enhanced furnace wall lance of claim 1, wherein: the gun is characterized in that an epoxy air inlet is formed in the rear portion of the gun, the epoxy air inlet is formed in one side, away from the second sealing ring, of the first sealing ring, and an epoxy air inlet channel is formed between the outer tube and the inner wall of the gun body.

4. High flow enhanced furnace wall lance according to any of claims 1 to 3, characterized in that: the inner pipe and the outer pipe are welded and fixed at one end close to the inner nozzle through steel plates, and the steel plates are arranged between the outer wall of the inner pipe and the inner wall of the outer pipe and in an axial area close to the inner nozzle by 300-400 mm.

5. High flow enhanced furnace wall lance according to any of claims 1 to 3, characterized in that: and one end of the inner diameter of the inner nozzle, which is close to the inner pipe, is provided with a transition fillet.