Nitrogen protection device for wire outlet of hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot

Abstract

The invention relates to a nitrogen protection device for a wire outlet of a hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot, and belongs to the technical field of hot-dip galvanized aluminum alloy steel wire production line equipment in the metallurgical industry. According to the technical scheme, the device comprises a nitrogen ingress pipe (1), a wire guide pipe (2), a protective outer pipe (4), a gas guide grid plate (5) and a sealing skirt sleeve (7), the wire guide pipe (2) and the protective outer pipe (4) are concentrically arranged inside and outside, the upper end of the protective outer pipe (4) is fixedly connected to the wire guide pipe (2) to form a closed structure, and the lower end of the protective outer pipe (4) is connected with the sealing skirt sleeve (7); the gas guide grid plate (5) is arranged between the lower end of the wire guide pipe (2) and the protective outer pipe (4), and the nitrogen introduction pipe (1) is fixedly connected to the protective outer pipe (4). The method has the beneficial effects that alloy in a high-temperature molten state in the zinc-aluminum alloy pot can be effectively prevented from chemically reacting with oxygen in air to generate zinc slag, and the surface quality of the hot-dip galvanized aluminum alloy steel wire is improved.

Description

Technical Field

[0001] The invention relates to a nitrogen protection device for a hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot outlet, belonging to the technical field of hot-dip galvanized aluminum alloy steel wire production line equipment in the metallurgical industry. Background Art

[0002] During the production process of the hot-dip galvanized aluminum alloy steel wire production line, since the alloy in the zinc-aluminum alloy pot is in a high-temperature molten state, the alloy has a relatively active chemical property and can easily react chemically with oxygen in the air to generate zinc slag. Once zinc slag is formed, during the operation of the steel wire, the zinc slag will hang on the wire to form zinc nodules or burrs, which will seriously affect the surface quality of the hot-dip galvanized aluminum alloy steel wire. Therefore, during the production process, the zinc-aluminum alloy liquid level on the steel wire outlet side of the zinc-aluminum alloy pot needs to be protected by nitrogen, while also ensuring the normal operation of the steel wire.

[0003] The traditional nitrogen protection device is a simple cylindrical device with the following disadvantages: (1) There is no countermeasure for the influence of the protective flowing nitrogen on the temperature of the zinc-aluminum alloy liquid; (2) After the protective nitrogen enters the protection device, it is in a natural flow, and there is no measure to ensure the uniform flow of nitrogen; (3) After the device is immersed in the zinc-aluminum alloy liquid surface, there is no countermeasure to reduce the conduction heat loss; (4) The liquid surface part inside the protection device is in a relatively static state, and the low-temperature nitrogen will cause the liquid surface temperature of this part to decrease. The traditional device has no countermeasure to reduce the temperature difference of the alloy liquid inside and outside the device. In view of the above problems encountered in practice, which have a great impact on the surface quality of hot-dip galvanized aluminum alloy steel wire, it is very necessary to design a new nitrogen protection device for the outlet of the hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot. Summary of the invention

[0004] The purpose of the present invention is to provide a nitrogen protection device for the outlet of a zinc-aluminum alloy pot for hot-dip galvanized aluminum alloy steel wire, which can effectively prevent the alloy in a high-temperature molten state in the zinc-aluminum alloy pot from chemically reacting with oxygen in the air to generate zinc slag, thereby improving the surface quality of the hot-dip galvanized aluminum alloy steel wire and solving the problems existing in the background technology.

[0005] The technical solution of the present invention is: A nitrogen protection device for the outlet of a hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot comprises a nitrogen inlet pipe, a wire guide pipe, a protective outer pipe, an air guide grid and a sealing skirt sleeve. The wire guide pipe and the protective outer pipe are concentrically arranged inside and outside. The upper end of the protective outer pipe is fixedly connected to the wire guide pipe to form a closed structure, and the lower end of the protective outer pipe is connected to the sealing skirt sleeve; the air guide grid plate is arranged between the lower end of the wire guide pipe and the protective outer pipe, and the nitrogen inlet pipe is fixedly connected to the protective outer pipe.

[0006] The air guide grid plate is provided with air guide holes which are evenly arranged in the circumferential direction.

[0007] The lower end of the protective outer tube is connected to the sealing skirt by connecting bolts.

[0008] A heat insulation ring is arranged between the lower end of the protective outer tube and the sealing skirt.

[0009] The sealing skirt is made of pure copper.

[0010] A fixing pin seat is arranged on the protective outer tube.

[0011] The beneficial effects of the present invention are: (1) The sealing skirt is made of pure copper. The purpose is to quickly transfer the heat of the zinc liquid outside the protective device to the inside of the protective device, reduce the temperature drop of the zinc-aluminum alloy liquid caused by the protective nitrogen, and make the zinc-aluminum alloy liquid inside the protective device have stable fluidity; (2) After the nitrogen enters the protection device, it is blown evenly toward the zinc-aluminum alloy liquid surface through the air guide grid, thereby achieving the purpose of evenly protecting the zinc-aluminum alloy liquid surface; (3) After the device is immersed in the zinc-aluminum alloy liquid, the insulation ring can reduce the heat conduction loss of the zinc-aluminum alloy liquid, effectively ensuring the stable fluidity of the zinc-aluminum alloy liquid inside the protective device, thereby ensuring the surface quality of the zinc-aluminum alloy steel wire; (4) The present invention has a simple structure and is easy to use and maintain. It effectively makes up for the defects of the nitrogen protection device at the outlet of the traditional hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot, and further improves the surface quality of the hot-dip galvanized aluminum alloy steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the front view of the general assembly of the present invention; Figure 2 It is a top view of the general assembly of the present invention; Figure 3 This is a front view of the assembly of the wire guide tube and the protective outer tube of the present invention; Figure 4 It is a top view of the assembly of the wire guide tube and the protective outer tube of the present invention; Figure 5 This is a front view of the sealing skirt of the present invention; Figure 6 A top view of the sealing skirt of the present invention; Figure 7 It is a schematic diagram of the air guide grid plate of the present invention; Figure 8 It is a schematic diagram of the heat insulation ring of the present invention; In the figure: nitrogen inlet pipe 1, wire guide tube 2, fixed pin seat 3, protective outer tube 4, air guide grid plate 5, insulation ring 6, sealing skirt 7, connecting bolt 8, top screw 9, air guide hole 10. DETAILED DESCRIPTION

[0013] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0014] See attached Figure 1-8 A nitrogen protection device for the outlet of a hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot comprises a nitrogen inlet pipe 1, a wire guide pipe 2, a protective outer pipe 4, an air guide grid plate 5 and a sealing skirt sleeve 7. The wire guide pipe 2 and the protective outer pipe 4 are concentrically arranged inside and outside. The upper end of the protective outer pipe 4 is fixedly connected to the wire guide pipe 2 to form a closed structure, and the lower end of the protective outer pipe 4 is connected to the sealing skirt sleeve 7; the air guide grid plate 5 is arranged between the lower end of the wire guide pipe 2 and the protective outer pipe 4, and the nitrogen inlet pipe 1 is fixedly connected to the protective outer pipe 4.

[0015] In this embodiment, refer to the attached Figure 1-8 The nitrogen protection device comprises a nitrogen inlet pipe 1, a wire guide pipe 2, a fixing pin seat 3, a protective outer pipe 4, an air guide grid plate 5, an insulation ring 6, a sealing skirt sleeve 7, a connecting bolt 8, a top screw 9 and an air guide hole 10. The overall height of the protection device is 130 mm. The diameter of the protective outer pipe 4 is 70 mm and the inner diameter is 54 mm; the diameter of the nitrogen inlet pipe 1 is 14 mm and the inner diameter is 12 mm; the outer diameter of the wire guide pipe 2 is 32 mm, the length is 80 mm, and the inner diameter is 26 mm; the sealing skirt sleeve 7 is made of pure copper, and the length of the thin-walled part immersed in the zinc liquid is 30 mm, and the wall thickness is 1.5 mm.

[0016] The diameter of the sealing skirt 7 matches the diameter of the protective outer tube 4. The sealing skirt 7 and the lower end of the protective outer tube 4 are connected together by connecting bolts 8, and a heat insulation ring 6 is installed in the middle.

[0017] The air guide grid 5 is provided with air guide holes 10 evenly arranged in the circumferential direction. The air guide grid 5 is fixed between the protective outer tube 4 and the wire guide tube 2 by the top screw 9. When nitrogen enters the space between the protective outer tube 4 and the wire guide tube 2, it is evenly blown toward the zinc-aluminum alloy liquid surface through the air guide grid 5, so as to achieve the purpose of evenly protecting the zinc-aluminum alloy liquid surface. There is a gap fit between the air guide grid 5 and the protective outer tube 4. When the zinc slag blocks the air guide holes 10 of the air guide grid 5, the entire protection device can be replaced offline, and then the top screw 9 is loosened to take out the air guide grid 5 for cleaning.

[0018] The use process of the present invention is as follows: When threading, the steel wire passes through the wire guide tube 2. After the steel wire is sent to the next process and is straightened, the protective device is fixed to the fixed beam of the zinc-aluminum alloy pot through the fixed pin seat 3, and the sealing skirt sleeve 7 is immersed in the zinc-aluminum alloy liquid surface, so that the liquid surface at the part where the wire passes through the zinc-aluminum alloy pot forms a relatively closed environment. Then protective nitrogen is introduced from the nitrogen inlet pipe 1, and the hot-dip galvanized aluminum alloy steel wire is output from the wire guide tube 2 through the zinc-aluminum alloy pot. The flowing positive pressure protective nitrogen also overflows from this tube to prevent air from entering the inside of the protective device and causing oxidation of the zinc-aluminum alloy liquid surface.

[0019] During normal production, low-temperature nitrogen is introduced from the nitrogen inlet pipe 1, so that the inside of the protection device is filled with nitrogen, and then overflows from the wire guide tube 2. The low-temperature nitrogen will cause the temperature of the liquid surface protected by the protection device to drop, while the overall temperature of the zinc pot is the process setting temperature, about 465°C. The heat of the zinc liquid outside the protection device can be quickly transferred to the inside of the protection device through the thin-walled pure copper sealing skirt 7, reducing the temperature drop of the zinc-aluminum alloy liquid caused by the protective nitrogen, so that the zinc-aluminum alloy liquid inside the protection device has stable fluidity, thereby stabilizing the surface quality of the hot-dip galvanized aluminum alloy steel wire.

Claims

1. A nitrogen protection device for the outlet of hot-dip galvanized aluminum alloy steel wire and zinc-aluminum alloy pot, characterized in that: The invention comprises a nitrogen inlet pipe (1), a wire guide pipe (2), a protective outer pipe (4), an air guide grid plate (5) and a sealing skirt sleeve (7); the wire guide pipe (2) and the protective outer pipe (4) are arranged concentrically inside and outside; the upper end of the protective outer pipe (4) is fixedly connected to the wire guide pipe (2) to form a closed structure; the lower end of the protective outer pipe (4) is connected to the sealing skirt sleeve (7); the air guide grid plate (5) is arranged between the lower end of the wire guide pipe (2) and the protective outer pipe (4); and the nitrogen inlet pipe (1) is fixedly connected to the protective outer pipe (4).

2. A nitrogen protection device for hot-dip galvanized aluminum alloy steel wire and zinc-aluminum alloy pot outlet according to claim 1, characterized in that: The air guide grid plate (5) is provided with air guide holes (10) evenly arranged in the circumferential direction.

3. A nitrogen protection device for hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot outlet according to claim 1, characterized in that: The lower end of the protective outer tube (4) is connected to the sealing skirt (7) via connecting bolts (8).

4. A nitrogen protection device for hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot outlet according to claim 1 or 3, characterized in that: A heat insulation ring (6) is provided between the lower end of the protective outer tube (4) and the sealing skirt (7).

5. A nitrogen protection device for hot-dip galvanized aluminum alloy steel wire zinc-aluminum alloy pot outlet according to claim 1 or 3, characterized in that: The sealing skirt (7) is made of pure copper.

6. A nitrogen protection device for hot-dip galvanized aluminum alloy steel wire and zinc-aluminum alloy pot outlet according to claim 1, characterized in that: A fixing pin seat (3) is provided on the protective outer tube (4).

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