RH furnace top gun

Abstract

The utility model relates to an RH (Ruhrstahl Heraeus) furnace top gun, which belongs to the technical field of steelmaking equipment and comprises a gun body and a spray head, the gun body consists of a plurality of layers of sleeves, the plurality of layers of sleeves sequentially comprise an oxygen pipe, a natural gas pipe, an ignition pipe, a flame detection pipe, a water pipe and an outer pipe from inside to outside, the oxygen pipe is arranged in the center inside the gun body, and a nozzle is arranged at one end of the oxygen pipe close to the spray head. According to the RH top lance disclosed by the utility model, the nozzle form is optimized at the spray head, so that the impact of oxygen on the liquid level of molten steel is relatively uniform, the smelting efficiency can be accelerated, and the noise can be reduced.

Description

Technical Field

[0001] The utility model relates to an RH furnace top gun, belonging to the technical field of steelmaking equipment. Background Art

[0002] The top gun is the main equipment for smelting molten steel in the vacuum tank in the RH (vacuum cycle degassing method) furnace. When molten steel is smelted in the vacuum tank, the chemical balance of the carbon-oxygen reaction is shifted to the direction of producing carbon monoxide, thereby smelting steel with a lower carbon content. Since the heat loss in the whole process is greater than the heat generated, gas combustion is required to compensate for the heat difference. The top gun is a device that transports oxygen and gas into the vacuum tank.

[0003] The current top gun has the disadvantages of low smelting efficiency, uneven impact of oxygen on the molten steel surface resulting in high noise, etc. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a RH furnace top gun in view of the above shortcomings, wherein the nozzle form is optimized at the nozzle, so that the impact of oxygen on the molten steel surface is more uniform, the smelting efficiency can be accelerated and the noise can be reduced.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: an RH furnace top gun, including a gun body and a nozzle, the gun body is composed of several layers of casing, and the several layers of casing are oxygen pipe, natural gas pipe, ignition pipe, flame detection pipe, water pipe and outer pipe from the inside to the outside, the oxygen pipe is arranged in the inner center of the gun body, and a nozzle is arranged at one end of the oxygen pipe close to the nozzle, the front end of the nozzle is conical, and the inner cavity diameter gradually decreases from the oxygen pipe to the nozzle.

[0006] As a further improvement of the above technical solution:

[0007] The distance between the nozzle end and the spray head is 15 mm.

[0008] An annular groove is arranged on the outer periphery of the nozzle, and a connector is arranged inside the nozzle, and the connector is inserted into the annular groove.

[0009] A plurality of natural gas pipes are evenly arranged on the outer circumference of the oxygen pipe, and the center of the circle where the plurality of natural gas pipes are located is arranged on the central axis of the gun body.

[0010] A flame detection tube and an ignition tube are also provided at the inner center of the gun body. The midpoint of the line connecting the flame detection tube and the ignition tube is on the central axis of the gun body. The diameters of the flame detection tube and the ignition tube are the same. The diameters of the flame detection tube and the ignition tube are larger than the diameters of the natural gas pipe. The centers of the flame detection tube and the ignition tube are respectively arranged on the circumferences of the several natural gas pipes.

[0011] The nozzle is fixed to the ends of the outer tube and the natural gas pipe. The nozzle is circular in shape. An oxygen outlet hole is arranged at the center of the nozzle. The center of the oxygen outlet hole corresponds to the center of the nozzle. A plurality of natural gas outlet holes are evenly arranged on the periphery of the oxygen outlet hole. The plurality of natural gas outlet holes are arranged on the same circumference. The center of the circle where the plurality of natural gas outlet holes are located is the center of the nozzle.

[0012] The nozzle is also provided with a flame detection outlet hole and an igniter outlet hole, the midpoint of the line between the flame detection outlet hole and the igniter outlet hole is the center of the nozzle, the diameters of the flame detection outlet hole and the igniter outlet hole are the same, the flame detection outlet hole and the igniter outlet hole correspond to the flame detection tube and the ignition tube respectively, the diameters of the flame detection outlet hole and the igniter outlet hole are larger than the diameters of the natural gas outlet hole, and the centers of the flame detection outlet hole and the igniter outlet hole are respectively arranged on the circumference of a number of natural gas pipes.

[0013] An ignition flange is arranged at one end of the ignition tube, a hanger is arranged at the end of the gun body away from the nozzle, the oxygen pipe is connected with an oxygen elbow, the natural gas pipe is connected with a fuel gas elbow, the water pipe is connected with a water inlet elbow, and the outer pipe is connected with a water outlet elbow.

[0014] The utility model adopts the above technical scheme and has the following advantages: the utility model RH top gun optimizes the nozzle form at the nozzle, so that the impact of oxygen on the molten steel surface is more uniform, which can speed up the smelting efficiency and reduce noise.

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the RH furnace top gun in the embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of the middle B part;

[0018] Figure 3 yes Figure 2 Right view of .

[0019] In the figure,

[0020] 1-gun body, 2-nozzle, 3-nozzle, 4-flame detection tube, 5-ignition tube, 6-outer tube, 7-water pipe, 8-natural gas pipe, 9-oxygen pipe, 10-gun seat, 11-oxygen outlet hole, 12-natural gas outlet hole, 13-flame detection outlet hole, 14-igniter outlet hole, 15-annular groove, 16-connector, 17-ignition flange, 18-hanging fixture, 19-oxygen elbow, 20-gas elbow, 21-water inlet elbow, 22-water outlet elbow. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0024] like Figure 1-3 As shown, an RH furnace top gun includes a gun body 1 and a nozzle 2. The gun body 1 is composed of a plurality of sleeve layers, which are oxygen tube 9, natural gas tube 8, ignition tube 5, flame detection tube 4, water tube 7 and outer tube 6 from inside to outside. The oxygen tube 9 is arranged at the inner center of the gun body 1. A nozzle 3 is arranged at one end of the oxygen tube 9 close to the nozzle 2. The front end of the nozzle 3 is conical. The inner cavity diameter gradually decreases from the oxygen tube 9 to the nozzle 3. An annular groove 15 is arranged on the outer periphery of the nozzle 3. A connector 16 is arranged inside the nozzle 2. The connector 16 is inserted into the annular groove 15. The distance between the end of the nozzle 3 and the nozzle 2 is 15 mm. A gun seat 10 is arranged on the gun body 1.

[0025] A number of natural gas pipes 8 are evenly arranged on the outer circumference of the oxygen pipe 9, and the center of the circle where the number of natural gas pipes 8 are located is set on the central axis of the gun body 1. A flame detection tube 4 and an ignition tube 5 are also provided at the inner center of the gun body 1. The midpoint of the line between the flame detection tube 4 and the ignition tube 5 is on the central axis of the gun body 1. The diameters of the flame detection tube 4 and the ignition tube 5 are the same, and the diameters of the flame detection tube 4 and the ignition tube 5 are larger than the diameters of the natural gas pipe 8. The centers of the flame detection tube 4 and the ignition tube 5 are respectively set on the circumference where the number of natural gas pipes 8 are located.

[0026] The nozzle 2 is fixed to the ends of the outer tube 6 and the natural gas pipe 8. The shape of the nozzle 2 is circular. An oxygen outlet hole 11 is provided at the center of the nozzle 2. The center of the oxygen outlet hole 11 corresponds to the center of the nozzle 3. A plurality of natural gas outlet holes 12 are evenly provided on the outer circumference of the oxygen outlet hole 11. The plurality of natural gas outlet holes 12 are arranged on the same circumference. The center of the circle where the plurality of natural gas outlet holes 12 are located is the center of the nozzle 2. A flame detection outlet hole 13 and an igniter outlet hole 14 are also provided on the nozzle 2. The midpoint of the line connecting the flame detection outlet hole 13 and the igniter outlet hole 14 is the center of the nozzle 2. The flame detection outlet hole 13 and the igniter outlet hole 14 have the same diameter. The flame detection outlet hole 13 and the igniter outlet hole 14 correspond to the flame detection tube 4 and the ignition tube 5 respectively. The diameters of the flame detection outlet hole 13 and the igniter outlet hole 14 are larger than the diameter of the natural gas outlet hole 12. The centers of the flame detection outlet hole 13 and the igniter outlet hole 14 are respectively arranged on the circumference where the plurality of natural gas pipes 8 are located.

[0027] An ignition flange 17 is provided at one end of the ignition tube 5, a hanger 18 is provided at the end of the gun body 1 away from the nozzle 2, the oxygen pipe 9 is connected to an oxygen elbow 19, the natural gas pipe 8 is connected to a gas elbow 20, the water pipe 7 is connected to a water inlet elbow 21, and the outer pipe 6 is connected to a water outlet elbow 22.

[0028] This structure of the nozzle 2 allows oxygen to flow out and can make the oxygen jet reach the surface of the molten steel more evenly, because the molten steel is circulated in the vacuum tank, which can improve the smelting efficiency. In addition, this structure does not form amplification, making the noise smaller.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A RH furnace top gun, characterized by: The invention comprises a gun body (1) and a nozzle (2), wherein the gun body (1) is composed of a plurality of sleeves, wherein the plurality of sleeves are, from the inside to the outside, an oxygen tube (9), a natural gas tube (8), an ignition tube (5), a flame detection tube (4), a water tube (7) and an outer tube (6), the oxygen tube (9) being arranged at the inner center of the gun body (1), and a nozzle (3) being arranged at one end of the oxygen tube (9) close to the nozzle (2), the front end of the nozzle (3) being tapered, and the inner cavity diameter gradually decreases from the oxygen tube (9) to the nozzle (3).

2. The RH furnace top gun according to claim 1, characterized in that: The distance between the end of the nozzle (3) and the spray head (2) is 15 mm.

3. The RH furnace top gun according to claim 2, characterized in that: An annular groove (15) is provided on the outer periphery of the nozzle (3), a connector (16) is provided inside the nozzle (2), and the connector (16) is inserted into the annular groove (15).

4. The RH furnace top gun according to claim 3, characterized in that: A plurality of natural gas pipes (8) are evenly arranged on the outer circumference of the oxygen pipe (9), and the center of the circle where the plurality of natural gas pipes (8) are located is arranged on the central axis of the gun body (1).

5. The RH furnace top gun according to claim 4, characterized in that: A flame detection tube (4) and an ignition tube (5) are also provided at the inner center of the gun body (1); the midpoint of the line connecting the flame detection tube (4) and the ignition tube (5) is on the central axis of the gun body (1); the flame detection tube (4) and the ignition tube (5) have the same diameter; the diameter of the flame detection tube (4) and the ignition tube (5) are larger than the diameter of the natural gas pipe (8); and the centers of the flame detection tube (4) and the ignition tube (5) are respectively arranged on the circumference of the plurality of natural gas pipes (8).

6. The RH furnace top gun according to claim 5, characterized in that: The nozzle (2) is fixed to the ends of the outer tube (6) and the natural gas tube (8). The nozzle (2) is circular in shape. An oxygen outlet hole (11) is provided at the center of the nozzle (2). The center of the oxygen outlet hole (11) corresponds to the center of the nozzle (3). A plurality of natural gas outlet holes (12) are evenly provided on the periphery of the oxygen outlet hole (11). The plurality of natural gas outlet holes (12) are arranged on the same circumference. The center of the circle where the plurality of natural gas outlet holes (12) are located is the center of the nozzle (2).

7. The RH furnace top gun according to claim 6, characterized in that: The nozzle (2) is also provided with a flame detection outlet hole (13) and an igniter outlet hole (14); the midpoint of the line connecting the flame detection outlet hole (13) and the igniter outlet hole (14) is the center of the nozzle (2); the flame detection outlet hole (13) and the igniter outlet hole (14) have the same diameter; the flame detection outlet hole (13) and the igniter outlet hole (14) correspond to the flame detection tube (4) and the ignition tube (5) respectively; the diameters of the flame detection outlet hole (13) and the igniter outlet hole (14) are larger than the diameter of the natural gas outlet hole (12); and the centers of the flame detection outlet hole (13) and the igniter outlet hole (14) are respectively arranged on the circumference of the plurality of natural gas tubes (8).

8. The RH furnace top gun according to claim 7, characterized in that: An ignition flange (17) is provided at one end of the ignition tube (5), a hanger (18) is provided at one end of the gun body (1) away from the nozzle (2), the oxygen tube (9) is connected to an oxygen elbow (19), the natural gas tube (8) is connected to a gas elbow (20), the water tube (7) is connected to a water inlet elbow (21), and the outer tube (6) is connected to a water outlet elbow (22).

Images