Nitrogen sealing device for oxygen lance of converter

Abstract

The utility model discloses a nitrogen sealing device for a converter oxygen lance, which is characterized in that six bypass ports are arranged on a nitrogen inlet of a nitrogen sealing seat, the bypass ports are connected with the nitrogen inlet and are uniformly arranged at an angle, and airflow of the bypass ports is sprayed out in a fan shape, so that annular sealing can be formed, and a full-range sealing effect on an oxygen lance port is realized; meanwhile, a part of airflow is encircled through the airflow grooves which are arranged at high and low positions to form a plurality of airflow sealing annular airflows which are encircled at high and low positions, so that the sealing effect is further improved, splashing of the steel slag can be effectively blocked through the design, and in addition, the nitrogen sealing plug is designed into a cone type, so that the steel slag can slide down along the surface of the cone when the oxygen lance scrapes the slag; the nitrogen sealing plug is arranged on the nitrogen sealing seat, staying and bonding are avoided, the jamming phenomenon is avoided, meanwhile, it is guaranteed that the nitrogen sealing plug and the nitrogen sealing seat can be tightly attached, and the stability of the sealing effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of converter equipment, in particular to a converter oxygen lance nitrogen sealing device. Background Art

[0002] The nitrogen seal seat currently used in our factory introduces nitrogen from both sides to form a nitrogen protective layer around the oxygen gun mouth, thereby reducing the contact between oxygen and the external environment to a certain extent, and can prevent oxygen from leaking from the oxygen gun mouth. However, in the actual smelting production process, the smelting speed is fast and the reaction in the furnace is violent. The traditional nitrogen seal seat cannot fully meet the sealing requirements of the oxygen gun mouth in this case. Especially during the slag scraping process of the oxygen gun, large pieces of steel slag will fall and accumulate on the nitrogen seal plug, and even enter the oxygen gun mouth. This will cause the oxygen gun to get stuck, triggering the oxygen gun tension alarm, and then making it impossible to pull out the oxygen gun smoothly, thus affecting the production rhythm. Utility Model Content

[0003] The purpose of the utility model is to provide a nitrogen sealing device for a converter oxygen lance, aiming to provide a design that can effectively avoid the occurrence of a "gun jam" accident in the converter oxygen lance and can isolate the occurrence of smoke escape from the oxygen lance mouth during the converter smelting process. By redesigning the nitrogen sealing plug and nitrogen sealing seat structure, the oxygen lance is effectively prevented from being jammed due to slag accumulation, and the sealing of the converter oxygen lance mouth is ensured, thereby improving the reliability of the production process.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a converter oxygen lance nitrogen sealing device, installed on the converter oxygen lance, including a nitrogen sealing seat, a nitrogen sealing plug, a nitrogen inlet, and a bypass port.

[0005] The nitrogen sealing plug is threadedly connected to the nitrogen sealing seat, and a high and low air flow groove is provided on the circumference of the inner wall of the nitrogen sealing seat. A plurality of nitrogen inlets are evenly connected at an angle on the outer circumference of the nitrogen sealing seat, and the nitrogen inlet penetrates the nitrogen sealing seat and is used in conjunction with a corresponding nitrogen outlet provided on the air flow groove. Bypass ports are symmetrically provided on the left and right sides of the outer circumference of the nitrogen inlet, and the other end of the bypass port penetrates the nitrogen sealing seat and is used in conjunction with a corresponding nitrogen outlet provided in the air flow groove.

[0006] Preferably, the nitrogen sealing plug is in a cone-shaped configuration, and the inclination angle of the cone is 30°-45°, so that when the oxygen lance slag falls, it slides along the surface of the cone.

[0007] Preferably, the nitrogen inlet of the nitrogen inlet is connected to a nitrogen source and controlled by a valve.

[0008] Preferably, the nitrogen outlet gas flow of the bypass port is ejected in a fan shape to form an annular seal around the oxygen lance.

[0009] Preferably, the gas flow partially flows along the gas flow slot and is further sealed around the oxygen lance.

[0010] Preferably, a reducing pipe is further included, which is arranged at the nitrogen outlet and is used to increase the pressure of the nitrogen when it is sprayed out to form an annular airflow.

[0011] Preferably, a spline groove is further included, which is provided on the inner circumference of the nitrogen sealing plug and is used in conjunction with the spline of the converter oxygen lance to enable the nitrogen sealing plug to be correctly positioned and fixed on the converter oxygen lance.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] Six bypass ports are arranged on the nitrogen inlet of the nitrogen sealing seat, which are connected to the nitrogen inlet and are arranged at a uniform angle. The airflow of the bypass ports is ejected in a fan shape, which can form an annular seal and achieve a full-range sealing effect on the oxygen gun muzzle. At the same time, a part of the airflow is surrounded by the airflow grooves arranged at high and low positions to form a plurality of airflow sealing annular airflows that surround at high and low positions, further increasing the sealing effect. This design can not only effectively block the splashing of steel slag, but also design the nitrogen sealing plug into a cone type, so that the steel slag can slide along the surface of the cone when the oxygen gun is scraping the slag, avoiding staying and sticking, thereby not causing jamming. At the same time, it also ensures that the nitrogen sealing plug and the nitrogen sealing seat can fit tightly, thereby ensuring the stability of the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall front structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 1. nitrogen sealing seat; 2. nitrogen sealing plug; 3. nitrogen inlet; 4. bypass port; 5. air flow slot. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] 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.

[0021] Example 1: Please refer to Figure 1-2 The utility model provides an embodiment: a converter oxygen lance nitrogen sealing device, installed on the converter oxygen lance, including a nitrogen sealing seat 1, a nitrogen sealing plug 2, a nitrogen inlet 3, and a bypass port 4,

[0022] The nitrogen sealing plug 2 is threadedly connected to the nitrogen sealing seat 1. The inner wall circumference of the nitrogen sealing seat 1 is provided with air flow grooves 5 arranged at high and low positions. The inner wall circumference is provided with air flow grooves 5 arranged at high and low positions. These grooves can form the direction and shape of nitrogen injection, which is helpful to form an annular nitrogen protection layer. At the same time, the air flow grooves 5 are arranged at high and low positions to further form a plurality of annular sealing protection rings arranged at high and low positions. A plurality of nitrogen inlets 3 are evenly connected at an angle on the outer circumference of the nitrogen sealing seat 1. The nitrogen inlet 3 is used to supply nitrogen to the nitrogen sealing seat 1, so as to ensure that nitrogen can evenly enter the nitrogen sealing seat 1 and form an annular injection to achieve a full range of sealing effect, forming a nitrogen Protective layer, the nitrogen inlet 3 penetrates the nitrogen sealing seat 1 and is used in conjunction with the corresponding nitrogen outlet opened on the air flow groove 5. Bypass ports 4 are symmetrically opened on the left and right sides of the outer circumference of the nitrogen inlet 3. The other end of the bypass port 4 penetrates the nitrogen sealing seat 1 and is used in conjunction with the corresponding nitrogen outlet opened in the air flow groove 5. The nitrogen inlet 3 is arranged at an angle on the outer circumference of the nitrogen sealing seat 1, so that the airflow of the bypass port 4 is ejected in a fan shape, forming an annular nitrogen protective layer around the oxygen gun. The annular seal can effectively isolate oxygen and prevent the intrusion of oxidation and other harmful gases, thereby protecting the oxygen gun and surrounding equipment from corrosion and damage.

[0023] The nitrogen sealing plug 2 is a cone-shaped setting with an inclination angle of 30°-45°. It is used to slide along the cone surface when the oxygen lance slag falls. It adopts a cone-shaped design with an inclination angle of usually 30°-45°. The steel slag can slide along the surface of the cone when the oxygen lance is scraped, avoiding retention and adhesion, thereby preventing the oxygen lance from being blocked by steel slag agglomeration. The nitrogen inlet of the nitrogen inlet 3 is connected to the nitrogen source and is controlled by a valve. The nitrogen outlet gas flow of the bypass port 4 is fan-shaped to form an annular seal around the oxygen lance. Part of the gas flow flows along the gas flow groove 5 and is further sealed around the oxygen lance. A part of the gas flow flows along the gas flow groove 5, thereby ensuring the directionality and stability of the gas flow, and further enhancing the sealing effect, ensuring that the gas coverage area is wide and uniform, and maximizing the efficiency of gas protection. A reducer is also included, which is arranged at the nitrogen outlet to increase the pressure when the nitrogen is sprayed to form an annular gas flow. A spline groove is also included, which is opened on the inner circumference of the nitrogen sealing plug 2 and is used in conjunction with the spline of the converter oxygen lance to correctly position and fix the nitrogen sealing plug 2 on the converter oxygen lance, ensuring that the nitrogen sealing plug 2 can be accurately installed on the oxygen lance to avoid displacement or loosening during operation, and ensuring the continuous effectiveness of the nitrogen seal.

[0024] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A converter oxygen lance nitrogen sealing device, installed on the converter oxygen lance, characterized in that: It includes a nitrogen sealing seat (1), a nitrogen sealing plug (2), a nitrogen inlet (3), and a bypass port (4). The nitrogen sealing plug (2) is threadedly connected to the nitrogen sealing seat (1); a high and low airflow groove (5) is provided on the inner wall circumference of the nitrogen sealing seat (1); a plurality of nitrogen inlets (3) are evenly connected at an angle on the outer circumference of the nitrogen sealing seat (1); the nitrogen inlets (3) penetrate the nitrogen sealing seat (1) and are used in conjunction with corresponding nitrogen outlets provided on the airflow groove (5); bypass ports (4) are symmetrically provided on the left and right sides of the outer circumference of the nitrogen inlet (3); the other end of the bypass port (4) penetrates the nitrogen sealing seat (1) and is used in conjunction with corresponding nitrogen outlets provided in the airflow groove (5).

2. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: The nitrogen sealing plug (2) is arranged in a cone shape, and the inclination angle of the cone is 30°-45°, so that when the oxygen lance slag falls, it slides along the surface of the cone.

3. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: The nitrogen inlet (3) is connected to a nitrogen source and is controlled by a valve.

4. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: The nitrogen outlet airflow of the bypass port (4) is ejected in a fan shape, forming an annular seal around the oxygen lance.

5. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: The air flow part flows along the air flow groove (5) and is further sealed around the oxygen lance.

6. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: It also includes a reducing pipe, which is arranged at the nitrogen outlet and is used to increase the pressure of the nitrogen when it is sprayed out to form an annular airflow.

7. The converter oxygen lance nitrogen sealing device according to claim 1, characterized in that: It also includes a spline groove, which is formed on the inner circumference of the nitrogen sealing plug (2) and is used in conjunction with the spline of the converter oxygen lance to enable the nitrogen sealing plug (2) to be correctly positioned and fixed on the converter oxygen lance.

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