Stable back pressure circular seam argon blowing stopper rod

Abstract

The utility model relates to the technical field of argon blowing stopper rods, in particular to a stable back pressure circular seam argon blowing stopper rod which comprises a stopper rod body and a stopper rod head, a first channel used for argon to flow is formed in the stopper rod body, the bottom of the first channel is communicated with a second channel in an inverted circular truncated cone shape, the bottom of the second channel is communicated with a third channel, and the third channel is communicated with the stopper rod head. A porous vent plug is arranged in the third channel, an air guide hole is formed in the stopper rod head, and a fixing mechanism used for fixing the porous vent plug is arranged on the upper portion of the porous vent plug. Argon flows into the gas guide hole from the first channel, the second channel and the third channel to be discharged, the flow speed of the argon is higher and higher through the gradually-reduced pipe diameter, the gas guide hole is prevented from being blocked, then the porous vent plug is fixed through the fixing ring, and it is avoided that when the argon flows in the channels, the gas guide hole is blocked. And the porous vent plug moves in the third channel to influence the air permeability of the stopper rod head.

Description

Technical Field

[0001] This utility model relates to the field of argon blowing plug technology, and in particular to a stable back pressure annular argon blowing plug. Background Technology

[0002] The stopper rod is an important component for controlling the flow rate of molten steel from the tundish to the crystallizer and the liquid level in the crystallizer. By blowing in argon gas, it washes away the solid impurities deposited on the inner wall of the nozzle and adsorbs the solid impurities in the molten steel inside the nozzle, thereby improving the quality of the molten steel.

[0003] Existing technologies, such as the novel stable back pressure annular argon blowing plug disclosed in CN218836074U, employ multiple vent holes evenly distributed around the outer edge of the plug. This allows gas to be blown out through these holes, resulting in dispersed, uniform, and stable gas flow and back pressure. It also reduces the likelihood of air bubbles and prevents deposits from clogging the vent holes and affecting gas permeability. Furthermore, because the plug and plug head are integrally molded, the plug is not compressed, preventing the vent holes from shrinking and affecting permeability. However, the following problems exist in its use:

[0004] When the above technology is used, since the vent plug is placed in the vent channel, when the argon gas flows in the vent channel, it will exert a gas thrust on the vent plug. After long-term use, the vent plug is prone to falling off, affecting the air permeability. Utility Model Content

[0005] The purpose of this invention is to solve the problem of the vent plug falling off during use in the ventilation channel, and to propose a stable back pressure ring slit argon blowing plug rod.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A back-pressure ring-slit argon-blowing stopper rod includes a stopper rod body and a stopper rod head. The stopper rod body has a first channel for argon gas flow. The bottom of the first channel is connected to a second channel in the shape of an inverted frustum. The bottom of the second channel is connected to a third channel. A porous vent plug is arranged in the third channel. The stopper rod head has a gas guide hole that extends upward into the stopper rod body. A fixing mechanism for fixing the porous vent plug is provided on the upper part of the porous vent plug.

[0008] Preferably, the fixing mechanism includes a fixing ring disposed in the third channel, and four fixing blocks are fixedly installed in the fixing ring in a circumferentially distributed manner. Each of the four fixing blocks has a threaded hole, and a fixing bolt is disposed in the threaded hole.

[0009] Preferably, the third channel inner wall is provided with four through holes, and the four through holes and the threaded hole of the third channel inner wall are correspondingly arranged.

[0010] Preferably, the outer surface of the stopper head is coated with a layer of anti-sticking paint, and the anti-sticking paint is attached to the outer surface of the lower end of the stopper body and the outer surface of the lower part of the stopper body, respectively.

[0011] Preferably, the upper part of the first channel is provided with a nut for connecting the stopper connecting rod, and the upper part of the nut is provided with a sealing gasket for sealing the upper part of the first channel.

[0012] Preferably, the middle part of the stopper body is provided with an erosion-resistant area, and the nut is arranged on the upper part of the erosion-resistant area.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model discloses a kind of stable back pressure ring seam argon blowing stopper, which comprises stopper body, stopper head, first channel, second channel and third channel, stopper body is provided with first channel, second channel and third channel, and stopper head is connected with the lower end of stopper body, and stopper head is provided with first channel, second channel and third channel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A stable back pressure ring seam argon blowing stopper structure diagram is provided for the utility model;

[0016] Figure 2 A stable back pressure ring seam argon blowing stopper A area local enlarged view is provided for the utility model;

[0017] Figure 3 A stable back pressure ring seam argon blowing stopper fixed ring and fixed block schematic diagram is provided for the utility model;

[0018] Figure 4 A stable back pressure ring seam argon blowing stopper threaded hole and fixed bolt schematic diagram is provided for the utility model.

[0019] In the drawing: 1, stopper body;2, erosion-resistant area;3, stopper head;4, first channel;5, second channel;6, third channel;7, gas guide hole;8, porous gas permeable plug;9, fixed ring;10, fixed block;11, threaded hole;12, fixed bolt;13, anti-sticking paint;14, sealing gasket;15, nut. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely part of the embodiments of the present utility model, rather than all the embodiments.

[0021] With reference to Figures 1-4 A kind of stable back pressure ring argon blow plug, including plug body 1 and plug head 3, first passage 4 for flowing through argon is set in plug body 1, the bottom of first passage 4 is connected with the second passage 5 of inverted circular platform shape, the bottom of second passage 5 is connected with third passage 6, and porous gas-permeable plug 8 is arranged in third passage 6, gas guide hole 7 is set in plug head 3, and gas guide hole 7 extends into plug body 1 upwards, and porous gas-permeable plug 8 upper portion is provided with the fixing mechanism for fixing porous gas-permeable plug 8, the pipe diameter of third passage 6 is smaller than the pipe diameter of first passage 4, so that the gas pressure in third passage 6 decreases when argon flows from first passage 4 into third passage 6, and the gas flow rate becomes larger, so that argon passes through gas guide hole 7 by fast flowing, and the gas guide hole 7 is avoided to be blocked by argon.

[0022] The fixing mechanism includes fixing ring 9 arranged in third passage 6, four fixing blocks 10 equidistantly distributed are fixedly installed in fixing ring 9, threaded hole 11 is formed in the four fixing blocks 10, and fixed bolt 12 is arranged in threaded hole 11.

[0023] Four through holes are formed in the inner wall of third passage 6, and the four through holes formed in the inner wall of third passage 6 and threaded hole 11 are correspondingly arranged, the outer wall of fixing ring 9 is attached to the inner wall of third passage 6, so that fixed bolt 12 is twisted to fix fixing ring 9 on the upper wall of porous gas-permeable plug 8, and the upper part of porous gas-permeable plug 8 is fixed by limiting third passage 6 through fixing block 10, and porous gas-permeable plug 8 is fixed by limiting the downward movement of porous gas-permeable plug 8 through the gradually decreasing pipe diameter of the bottom of third passage 6.

[0024] The outer surface of plug head 3 is coated with a layer of anti-sticking paint 13, and the anti-sticking paint 13 is attached to the outer surface of the lower end of plug body 1 and the outer surface of the lower part of plug body 1 respectively, so that the gas guide hole 7 is not blocked by the accumulated material on the surface of plug head 3, and the gas permeability is not affected.

[0025] The upper part of first passage 4 is provided with nut 15 for connecting plug connecting rod, and the upper part of nut 15 is provided with sealing gasket 14 for sealing the upper part of first passage 4.

[0026] The middle part of plug body 1 is provided with erosion-resistant area 2, and nut 15 is arranged on the upper part of erosion-resistant area 2.

[0027] The functional principle of the present utility model can be described as follows:

[0028] By placing the porous air permeable plug 8 into the first channel 4, then the porous air permeable plug 8 will slide from the first channel 4 under the action of gravity into the second channel 5, and finally into the third channel 6, then by placing the fixing ring 9 to the upper wall of the porous air permeable plug 8, then by screwing the fixing bolt 12 from the threaded hole 11 into the through hole in the third channel 6, the fixing ring 9 is positioned to avoid the movement of the porous air permeable plug 8, then argon is injected into the first channel 4, so that the argon flows from the first channel 4 into the second channel 5, and finally into the third channel 6, and in the flow process, the channel aperture becomes smaller and smaller, so that the flow rate of argon becomes faster and faster, and finally is discharged through the gas guide hole 7, and by the high-speed flow of argon, the gas guide hole 7 is prevented from being blocked.

[0029] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change, which should be covered in the protection scope of the present application.

Claims

1. A back pressure stabilizing ring type argon lancing stopper rod comprising a stopper rod body (1) and a stopper rod head (3), characterized in that, The first channel (4) for circulating argon is arranged in the plug rod body (1), the bottom of the first channel (4) is connected with a second channel (5) in the shape of an inverted circular platform, the bottom of the second channel (5) is connected with a third channel (6), the porous air-permeable plug (8) is arranged in the third channel (6), the air guide hole (7) is arranged in the plug rod head (3) and extends upward into the plug rod body (1), and the upper part of the porous air-permeable plug (8) is provided with a fixing mechanism for fixing the porous air-permeable plug (8).

2. A back pressure stabilizing ring type argon lancing plug according to claim 1, wherein The fixing mechanism comprises a fixing ring (9) arranged in the third channel (6), four fixing blocks (10) are fixedly arranged in the fixing ring (9) and are distributed in the shape of an equidistant circle, threaded holes (11) are arranged in the four fixing blocks (10), and the fixing bolts (12) are arranged in the threaded holes (11).

3. A back pressure stabilizing ring type argon lancing plug according to claim 2, wherein Four through holes are arranged in the inner wall of the third channel (6) and correspond to the threaded holes (11), and the outer wall of the fixing ring (9) is attached to the inner wall of the third channel (6).

4. The back pressure stabilizing ring type argon lancing plug according to claim 1, wherein, The outer surface of the plug rod head (3) is coated with a layer of anti-sticking paint (13), and the anti-sticking paint (13) is attached to the outer surface of the lower end of the plug rod body (1) and the outer surface of the lower part of the plug rod body (1).

5. The back pressure stabilizing ring type argon lancing plug according to claim 1, wherein, The upper part of the first channel (4) is provided with a nut (15) for connecting the plug rod connecting rod, and the upper part of the nut (15) is provided with a sealing gasket (14) for sealing the upper part of the first channel (4).

6. A back pressure stabilizing ring type argon lancing plug according to claim 1, wherein The middle part of the plug rod body (1) is provided with an anti-erosion area (2), and the nut (15) is arranged on the upper part of the anti-erosion area (2).

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