Top lance

Abstract

The utility model relates to a top lance, which belongs to the technical field of steelmaking equipment, and comprises a lance body and a nozzle, the lance body consists of a plurality of layers of sleeves, the plurality of layers of sleeves sequentially comprise an oxygen pipe, a gas delivery pipe, a water pipe and an outer pipe from inside to outside, the oxygen pipe is arranged in the center of the inside of the lance body, and a conical part is arranged at one end of the oxygen pipe close to the nozzle. A nozzle is arranged at the front end of the conical part, the section of the nozzle is circular, the diameter of the nozzle is smaller than that of the oxygen pipe, a plurality of gas conveying pipes are uniformly arranged on the periphery of the oxygen pipe, and the circle center of the circumference where the gas conveying pipes are located is arranged on the central axis of the gun body. Coal gas is brought to the surface of molten steel by high-flow-speed oxygen jet flow and directly burns to heat the molten steel, so that the coal gas utilization rate is increased; in addition, on-site maintenance can be directly carried out, factory returning is not needed, maintenance time is saved, and production continuity is guaranteed.

Description

Technical Field

[0001] The utility model relates to a top gun and belongs 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 guns generally have the problem of low gas utilization rate. In addition, the top guns generally cannot be repaired on site and can only be returned to the factory for repair, which affects the continuity of production. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a top gun in view of the above shortcomings, to connect the gas outlet to the oxygen outlet, so that the gas is brought to the surface of the molten steel by the high-velocity oxygen jet and directly burns to heat the molten steel, thereby improving the gas utilization rate; in addition, maintenance can be carried out directly on site without returning to the factory, thus saving maintenance time and ensuring the continuity of production.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a top gun, including a gun body and a nozzle, the gun body is composed of a plurality of layers of casings, and the plurality of layers of casings are oxygen pipes, gas delivery pipes, water pipes and outer pipes from the inside to the outside, the oxygen pipe is arranged at the inner center of the gun body, a tapered portion is arranged at the end of the oxygen pipe close to the nozzle, a nozzle is arranged at the front end of the tapered portion, the cross-sectional shape of the nozzle is circular, the diameter of the nozzle is smaller than the diameter of the oxygen pipe, a plurality of gas delivery pipes are evenly arranged on the outer circumference of the oxygen pipe, and the center of the circle where the plurality of gas delivery pipes are located is arranged on the central axis of the gun body.

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

[0007] The nozzle is provided with a connector, which is fixed to the ends of the outer pipe, the gas delivery pipe and the oxygen pipe through the connector. The end of the connector is fixed to the nozzle. The connector is conical in shape, and the inner diameter of the connector gradually increases from the nozzle to the outer surface of the nozzle.

[0008] The inner surface of the connecting piece is evenly provided with a plurality of gas outlet holes, the plurality of gas outlet holes are respectively connected with a plurality of gas delivery pipes, and the angle between two adjacent gas outlet holes is 6-60 degrees.

[0009] The shape of the nozzle is circular, and a circular outlet hole is arranged at the center of the nozzle.

[0010] The water pipe is connected with a water inlet pipe, the gas delivery pipe is connected with a gas pipe, the oxygen pipe is connected with an oxygen pipe, and a flame detection joint is arranged at the end of the oxygen pipe.

[0011] An oxygen connecting pipe flange is arranged at one end of the oxygen connecting pipe, a gas connecting pipe flange is arranged at one end of the gas connecting pipe, and a first sealing ring is arranged between the oxygen connecting pipe flange and the gas connecting pipe flange.

[0012] A second sealing ring is arranged between the oxygen pipe and the rear end of the gun body, and a third sealing ring is arranged between the gas delivery pipe and the rear end of the gun body.

[0013] The oxygen connecting pipe is connected with an oxygen elbow, the gas connecting pipe is connected with a gas elbow, the water inlet connecting 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 top gun connects the gas outlet to the oxygen outlet, and the gas is brought to the surface of the molten steel by the high-velocity oxygen jet, and directly burns to heat the molten steel, thereby improving the utilization rate of the gas. In addition, a sealing ring is used at the top of the top gun. If the nozzle is damaged and needs to be replaced during the use of the top gun, the oxygen pipe and the gas pipe can be separated from the gun body by the first sealing ring, and the oxygen pipe and the gas delivery pipe can be separated from the gun body by the second sealing ring and the third sealing ring. In this way, only the weld between the top gun nozzle and the outer tube is cut, and the gun body can be divided into two parts. The nozzle can be replaced by cutting the welds between the nozzle and the gas delivery pipe and the oxygen pipe. This structure can be repaired directly on site without returning to the factory, saving maintenance time and ensuring the continuity of production.

[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 top gun in the embodiment of the utility model;

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

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

[0019] In the figure,

[0020] 1-nozzle, 2-outer pipe, 3-water pipe, 4-gas delivery pipe, 5-oxygen pipe, 6-gun seat, 7-gun body, 8-conical part, 9-nozzle, 10-water inlet pipe, 12-gas pipe, 13-gas outlet hole, 14-oxygen pipe, 15-circular outlet hole, 16-connecting piece, 17-oxygen elbow, 18-gas elbow, 19-flame detection joint, 20-water inlet elbow, 21-water outlet elbow, 22-first sealing ring, 23-second sealing ring, 24-third sealing ring, 25-oxygen pipe flange, 26-gas pipe flange. 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 1-3As shown, a top gun includes a gun body 7 and a nozzle 1. The front end of the gun body 7 is composed of a plurality of sleeve layers, which are oxygen pipe 5, gas delivery pipe 4, water pipe 3 and outer pipe 2 from inside to outside. The oxygen pipe 5 is arranged at the inner center of the gun body 7. The end of the oxygen pipe 5 close to the nozzle 1 is provided with a tapered portion 8. The front end of the tapered portion 8 is provided with a nozzle 9. The cross-sectional shape of the nozzle 9 is circular. The diameter of the nozzle 9 is smaller than the diameter of the oxygen pipe 5. A plurality of gas delivery pipes 4 are evenly arranged on the outer circumference of the oxygen pipe 5. The center of the circle where the plurality of gas delivery pipes 4 are located is set on the central axis of the gun body 7. A gun seat 6 is provided on the gun body 7.

[0025] The nozzle 1 is provided with a connector 16, and the nozzle 1 is fixed to the ends of the outer tube 2, the gas delivery pipe 4 and the oxygen pipe 5 through the connector 16. The end of the connector 16 is fixed to the nozzle 9. The connector 16 is in a cone shape, and the inner diameter of the connector 16 gradually increases from the nozzle 9 to the outer surface of the nozzle 1. A plurality of gas outlet holes 13 are evenly arranged on the inner surface of the connector 16. The plurality of gas outlet holes 13 are respectively connected to the plurality of gas delivery pipes 4, and the angle between two adjacent gas outlet holes 13 is 6-60 degrees. The shape of the nozzle 1 is circular, and a circular outlet hole 15 is arranged at the center of the nozzle 1.

[0026] The water pipe 3 is connected to a water inlet pipe 10, the gas delivery pipe 4 is connected to a gas pipe 12, the oxygen pipe 5 is connected to an oxygen pipe 14, and a flame detection joint 19 is provided at the end of the oxygen pipe 14, through which the flame combustion condition is observed.

[0027] An oxygen connecting pipe flange 25 is provided at one end of the oxygen connecting pipe 14, a gas connecting pipe flange 26 is provided at one end of the gas connecting pipe 12, a first sealing ring 22 is provided between the oxygen connecting pipe flange 25 and the gas connecting pipe flange 26, a second sealing ring 23 is provided between the oxygen pipe 5 and the rear end of the gun body 7, and a third sealing ring 24 is provided between the gas delivery pipe 4 and the rear end of the gun body 7.

[0028] The oxygen pipe connection 14 is connected to an oxygen elbow 17 , the gas pipe connection 12 is connected to a gas elbow 18 , the water inlet pipe connection 10 is connected to a water inlet elbow 20 , and the outer pipe 2 is connected to a water outlet elbow 21 .

[0029] The utility model top gun connects the gas outlet to the oxygen outlet at the nozzle, and the gas is brought to the surface of the molten steel by the high-velocity oxygen jet, and directly burns to heat the molten steel, thereby improving the utilization rate of the gas. In addition, a sealing ring is used at the top of the top gun. If the nozzle is damaged and needs to be replaced during the use of the top gun, the oxygen pipe and the gas pipe can be separated from the gun body by the first sealing ring 22, and the oxygen pipe and the gas delivery pipe can be separated from the gun body by the second sealing ring 23 and the third sealing ring 24. In this way, the gun body can be divided into two parts by cutting the weld between the top gun nozzle and the outer pipe, and the nozzle can be replaced by cutting the welds between the nozzle and the gas delivery pipe and the oxygen pipe. This structure can be repaired directly on site without returning to the factory, saving maintenance time and ensuring the continuity of production.

[0030] 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 top gun, characterized in that: The invention comprises a gun body (7) and a nozzle (1), wherein the gun body (7) is composed of a plurality of sleeves, wherein the plurality of sleeves are, from the inside to the outside, an oxygen pipe (5), a gas delivery pipe (4), a water pipe (3) and an outer pipe (2), the oxygen pipe (5) being arranged at the inner center of the gun body (7), a conical portion (8) being arranged at one end of the oxygen pipe (5) close to the nozzle (1), a nozzle (9) being arranged at the front end of the conical portion (8), the cross-sectional shape of the nozzle (9) being circular, the diameter of the nozzle (9) being smaller than the diameter of the oxygen pipe (5), a plurality of gas delivery pipes (4) being evenly arranged at the outer circumference of the oxygen pipe (5), the center of the circle where the plurality of gas delivery pipes (4) are located being arranged at the central axis of the gun body (7).

2. A top gun according to claim 1, characterized in that: The nozzle (1) is provided with a connecting piece (16), and the nozzle (1) is fixed to the ends of the outer tube (2), the gas delivery tube (4) and the oxygen tube (5) through the connecting piece (16). The end of the connecting piece (16) is fixed to the nozzle (9). The connecting piece (16) is in a conical shape, and the inner diameter of the connecting piece (16) gradually increases from the nozzle (9) to the outer surface of the nozzle (1).

3. A top gun according to claim 2, characterized in that: The inner surface of the connecting piece (16) is evenly provided with a plurality of gas outlet holes (13), the plurality of gas outlet holes (13) are respectively connected to a plurality of gas delivery pipes (4), and the angle between two adjacent gas outlet holes (13) is 6-60 degrees.

4. A top gun according to claim 3, characterized in that: The nozzle (1) is circular in shape, and a circular outlet hole (15) is provided at the center of the nozzle (1).

5. A top gun according to claim 4, characterized in that: The water pipe (3) is connected to a water inlet pipe (10), the gas delivery pipe (4) is connected to a gas pipe (12), the oxygen pipe (5) is connected to an oxygen pipe (14), and a flame detection connector (19) is provided at the end of the oxygen pipe (14).

6. A top gun according to claim 5, characterized in that: An oxygen connecting pipe flange (25) is provided at one end of the oxygen connecting pipe (14), a gas connecting pipe flange (26) is provided at one end of the gas connecting pipe (12), and a first sealing ring (22) is provided between the oxygen connecting pipe flange (25) and the gas connecting pipe flange (26).

7. A top gun according to claim 6, characterized in that: A second sealing ring (23) is provided between the oxygen tube (5) and the rear end of the gun body (7), and a third sealing ring (24) is provided between the gas delivery tube (4) and the rear end of the gun body (7).

8. A top gun according to claim 7, characterized in that: The oxygen connecting pipe (14) is connected to an oxygen elbow (17), the gas connecting pipe (12) is connected to a gas elbow (18), the water inlet connecting pipe (10) is connected to a water inlet elbow (20), and the outer pipe (2) is connected to a water outlet elbow (21).

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