High-safety bottom blowing gun

Abstract

The utility model relates to a bottom blowing gun with high safety, which belongs to the technical field of bottom blowing guns, and comprises an outer pipe, an inner pipe and a core rod, the inner pipe and the outer pipe are sequentially sleeved outside the core rod, a gap is arranged between the inner pipe and the core rod, a gap is arranged between the outer pipe and the inner pipe, the rear end of the outer pipe is fixedly connected with a supporting part, and the supporting part is fixedly connected with an air inlet cavity. The rear end of the outer pipe, the rear end of the inner pipe and the rear end of the core rod are all arranged in the air inlet cavity, an air inlet is formed in the lower portion of the air inlet cavity, a connecting portion is arranged at the lower end of the air inlet, the connecting portion is connected with an air inlet pipe, a filtering portion is arranged at the upper end of the air inlet pipe, and a filtering net is arranged in the filtering portion. And through filtering of the filter screen, combustible materials and other impurities can be prevented from entering the gun body to cause the risks of spray pipe blockage, even combustion, explosion and the like, the safety and reliability of the gun are improved, and the service life of the gun is prolonged.

Description

Technical Field

[0001] The utility model relates to a bottom blowing lance with high safety, belonging to the technical field of bottom blowing lances. Background Art

[0002] The bottom blowing lance is a key equipment for converter steelmaking. It is mainly used for bottom blowing molten steel in the converter to improve metallurgical properties, enhance the quality of molten steel and reduce the comprehensive cost. The design and performance of the bottom blowing lance directly affect the efficiency and quality in the smelting process. At present, the bottom blowing lance is not equipped with a filtering device, and the inert gas introduced often contains impurities such as combustibles, resulting in risks such as blockage, combustion and explosion. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a bottom blowing lance with high safety in view of the above deficiencies. A filter screen is arranged in the air inlet pipe. Through the filtration of the filter screen, impurities such as combustibles can be prevented from entering the lance body, avoiding risks such as nozzle blockage, combustion and explosion, improving the safety and reliability of the lance, and prolonging the service life of the lance.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows: A bottom blowing lance with high safety, including an outer pipe, an inner pipe and a core rod. The inner pipe and the outer pipe are sleeved on the outside of the core rod in sequence. There is a gap between the inner pipe and the core rod, and there is a gap between the outer pipe and the inner pipe. The rear end of the outer pipe is fixedly connected with a support part, and the support part is fixedly connected with an air inlet cavity. The rear ends of the outer pipe, the inner pipe and the core rod are all arranged inside the air inlet cavity. An air inlet is arranged below the air inlet cavity, a connecting part is arranged at the lower end of the air inlet, the connecting part is connected with an air inlet pipe, the upper end of the air inlet pipe has a filtering part, and a filter screen is arranged inside the filtering part.

[0005] As a further improvement of the above technical scheme:

[0006] The diameter of the filtering part is larger than the diameter of the air inlet.

[0007] The filter screen is conical, and the bottom of the cone is fixedly connected to the connecting part.

[0008] A ventilation flange is arranged between the rear end of the inner pipe and the side part of the air inlet cavity.

[0009] The rear end of the core rod is fixedly connected to the bottom of the air inlet cavity.

[0010] A sleeve is sleeved on the outside of the outer pipe.

[0011] The utility model adopts the above technical solutions and has the following advantages: A filter screen is arranged in the air inlet pipe of the utility model. The inert gas enters from the air inlet pipe, passes through the conical filter screen and then enters the air inlet cavity, and then enters the inner pipe and the outer pipe. The filtration by the filter screen can prevent impurities such as combustibles from entering the gun body, thus avoiding risks such as blockage, combustion and explosion, improving the safety and reliability of the gun, and prolonging the service life of the gun.

[0012] The following further explains the utility model with reference to the drawings and embodiments. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a bottom blowing gun with high safety in an embodiment of the utility model.

[0014] In the figure,

[0015] 1 - outer pipe, 2 - inner pipe, 3 - mandrel, 4 - sleeve, 5 - support part, 6 - air inlet cavity, 7 - ventilation flange, 8 - air inlet, 9 - connection part, 10 - air inlet pipe, 11 - filtering part, 12 - filter screen. Specific Embodiments

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0017] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the utility model. Embodiment

[0018] As Figure 1As shown in the figure, a bottom blowing lance with high safety includes an outer tube 1, an inner tube 2 and a mandrel 3. The inner tube 2 and the outer tube 1 are sleeved on the outside of the mandrel 3 in sequence. There is a gap between the inner tube 2 and the mandrel 3, and there is a gap between the outer tube 1 and the inner tube 2. A sleeve 4 is sleeved on the outside of the outer tube 1. A support part 5 is fixedly connected to the rear end of the outer tube 1. The support part 5 is fixedly connected to an air inlet cavity 6. The rear ends of the outer tube 1, the inner tube 2 and the mandrel 3 are all arranged inside the air inlet cavity 6. The rear end of the mandrel 3 is fixedly connected to the bottom of the air inlet cavity 6. A ventilation flange 7 is arranged between the rear end of the inner tube 2 and the side of the air inlet cavity 6. The ventilation flange 7 not only plays a supporting role, but also enables gas to enter the inner tube 2 and the outer tube 1. An air inlet 8 is arranged below the air inlet cavity 6. A connecting part 9 is arranged at the lower end of the air inlet 8. The connecting part 9 is connected to an air inlet pipe 10. The upper end of the air inlet pipe 10 has a filtering part 11. The diameter of the filtering part 11 is larger than the diameter of the air inlet 8. A filter screen 12 is arranged inside the filtering part 11. The filter screen 12 is conical, and the bottom of the cone is fixedly connected to the connecting part 9.

[0019] Inert gas enters from the air inlet pipe 10, is filtered by the conical filter screen 12 and then enters the air inlet cavity 6, and then enters the inner tube 2 and the outer tube 1. The filtering by the filter screen 12 can prevent impurities such as combustibles from entering the lance body and causing blockage, or even risks such as combustion and explosion, improve the safety and reliability of the lance, and extend the service life of the lance.

[0020] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bottom blowing gun with high safety, characterized by: The invention comprises an outer tube (1), an inner tube (2) and a core rod (3), wherein the inner tube (2) and the outer tube (1) are sleeved on the outside of the core rod (3) in sequence, a gap is provided between the inner tube (2) and the core rod (3), and a gap is provided between the outer tube (1) and the inner tube (2), the rear end of the outer tube (1) is fixedly connected to a support portion (5), the support portion (5) is fixedly connected to an air intake cavity (6), the rear ends of the outer tube (1), the inner tube (2) and the core rod (3) are all arranged inside the air intake cavity (6), an air intake port (8) is provided below the air intake cavity (6), a connecting portion (9) is provided at the lower end of the air intake port (8), the connecting portion (9) is connected to an air intake pipe (10), the upper end of the air intake pipe (10) is provided with a filter portion (11), and a filter screen (12) is provided inside the filter portion (11).

2. A bottom blowing gun with high safety according to claim 1, characterized in that: The diameter of the filter portion (11) is greater than the diameter of the air inlet (8).

3. A bottom blowing gun with high safety according to claim 2, characterized in that: The filter screen (12) is conical, and the bottom of the cone is fixedly connected to the connecting portion (9).

4. A bottom blowing gun with high safety according to claim 3, characterized in that: A ventilation flange (7) is provided between the rear end of the inner tube (2) and the side of the air inlet cavity (6).

5. A bottom blowing gun with high safety according to claim 4, characterized in that: The rear end of the core rod (3) is fixedly connected to the bottom of the air inlet cavity (6).

6. A bottom blowing gun with high safety according to claim 1, characterized in that: The outer portion of the outer tube (1) is sleeved with a sleeve (4).

Images