Overflow type zinc liquid supplementing device for strip steel galvanized pot

Abstract

An overflow type liquid zinc supplementing device for a strip steel galvanizing pot belongs to the technical field of strip steel processing equipment and comprises a galvanizing pot used for containing liquid zinc and carrying out hot-dip galvanizing and a zinc melting furnace used for melting zinc ingots into high-temperature liquid zinc, the bottom of the zinc melting furnace is higher than the bottom of the galvanizing pot, a liquid outlet is formed in the bottom of the zinc melting furnace, and a liquid outlet is formed in the bottom of the zinc melting furnace. A flow guide channel located below the liquid outlet is arranged between the galvanizing pot and the zinc melting furnace and obliquely extends downwards in the flowing direction of the zinc liquid, a buffer chamber is arranged outside the galvanizing pot and communicated with the galvanizing pot through a through groove formed in the galvanizing pot, and the bottom wall of the through groove and the bottom wall of the buffer chamber are both lower than the liquid level of the zinc liquid in the galvanizing pot. And the bottom end of the flow guide channel is erected at the top end of the buffer chamber, so that zinc liquid in the zinc melting furnace flows into the buffer chamber through the flow guide channel and then enters the galvanizing pot through the through groove. According to the device, large fluctuation of the temperature of the zinc liquid in the galvanizing pot is avoided, and the uniformity of the coating thickness is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of strip steel processing equipment, specifically to an overflow zinc liquid replenishment device for strip steel galvanizing pots. Background Technology

[0002] In the continuous hot-dip galvanizing process of strip steel, the stability and efficiency of the zinc liquid replenishment device directly affect the coating quality and production cost. In traditional technology, the zinc liquid is often directly conveyed between the molten zinc furnace and the galvanizing pot, that is, the high-temperature zinc liquid is directly poured from the molten zinc furnace into the galvanizing pot. Due to the lack of a buffer cooling structure, the temperature of the zinc liquid in the galvanizing pot fluctuates greatly, which can easily cause uneven coating thickness or surface defects. Utility Model Content

[0003] To address the problem of large temperature fluctuations in the zinc bath caused by direct flow in existing technologies, this invention provides an overflow-type zinc bath replenishment device for strip steel galvanizing pots, which avoids large temperature fluctuations in the zinc bath and improves the uniformity of coating thickness.

[0004] To achieve the above objectives, the specific solution adopted by this utility model is as follows: an overflow zinc liquid replenishment device for a strip steel galvanizing pot, comprising a galvanizing pot for holding zinc liquid and performing hot-dip galvanizing, and a zinc melting furnace for melting zinc ingots into high-temperature zinc liquid. The bottom of the zinc melting furnace is higher than the bottom of the galvanizing pot. The bottom of the zinc melting furnace is provided with a liquid outlet. A guide channel is provided between the galvanizing pot and the zinc melting furnace, located below the liquid outlet. The guide channel extends downward along the direction of zinc liquid flow. A buffer chamber is provided outside the galvanizing pot. The buffer chamber is connected to the galvanizing pot through a through groove opened on the galvanizing pot. The bottom wall of the through groove and the bottom wall of the buffer chamber are both lower than the zinc liquid level in the galvanizing pot. The bottom end of the guide channel is placed on the top of the buffer chamber, so that the zinc liquid in the zinc melting furnace flows into the buffer chamber through the guide channel and then enters the galvanizing pot through the through groove.

[0005] As an optimized solution for the above-mentioned overflow zinc liquid replenishment device for strip steel galvanizing pot: the top of the zinc melting furnace is provided with a feed inlet, and the feed inlet is provided with a cover.

[0006] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for a strip steel galvanizing pot: a control valve is provided on the liquid outlet.

[0007] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for strip steel galvanizing pot: the zinc melting furnace is provided with mounting boxes on both sides, and the mounting boxes are connected to the zinc melting furnace by fixing rods.

[0008] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for strip steel galvanizing pot: the zinc melting furnace includes an outer shell layer, an insulation layer and an inner shell layer arranged sequentially from the outside to the inside.

[0009] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for a strip steel galvanizing pot: the bottom wall of the buffer chamber is flush with the bottom wall of the through groove.

[0010] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for galvanized steel pans: the guide channel is a semi-circular tubular structure, and the outer wall of the guide channel is covered with a refractory groove.

[0011] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for a strip steel galvanizing pot: the material of the guide channel is zinc.

[0012] As another optimized solution for the above-mentioned overflow zinc liquid replenishment device for strip steel galvanizing pot: the end of the guide channel located below the liquid outlet is an expansion section.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) This utility model provides an overflow zinc liquid replenishment device for a strip steel galvanizing pot. The buffer chamber set outside the galvanizing pot is connected to the galvanizing pot through a channel. The bottom wall of the channel and the bottom wall of the buffer chamber are both lower than the zinc liquid level in the galvanizing pot, so that the zinc liquid settles naturally in the buffer chamber and the flow rate is reduced, reducing flow impact and temperature fluctuation, thereby improving the uniformity and surface quality of the strip steel coating.

[0015] 2) In this utility model, the top feed port of the zinc melting furnace is equipped with a cover, which effectively reduces heat loss and zinc liquid oxidation, and improves the utilization rate of zinc liquid; the outlet is equipped with a control valve, which can accurately adjust the zinc liquid flow rate to ensure the continuity and stability of the galvanizing process;

[0016] 3) The guide channel is made of zinc, the same material as the zinc liquid. After long-term use, the zinc liquid solidifies on the guide channel. The guide channel can be directly removed from the refractory tank and placed into the zinc melting furnace, which helps to improve the reuse rate of the guide channel. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the zinc liquid replenishment device;

[0018] Figure 2 This is a top view of the zinc liquid replenishment device;

[0019] Figure 3 This is a top view of the flow channel;

[0020] Attached reference numerals: 1. Galvanizing pot, 2. Zinc melting furnace, 201. Liquid outlet, 202. Control valve, 203. Feed inlet, 204. Cover, 3. Guide channel, 301. Expansion section, 4. Through groove, 5. Buffer chamber, 6. Mounting box, 7. Fixing rod, 8. Refractory tank. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0022] Example 1

[0023] like Figure 1 , Figure 2 As shown, an overflow zinc liquid replenishment device for a strip steel galvanizing pot includes a galvanizing pot 1 for holding zinc liquid and hot-dip galvanizing, and a zinc melting furnace 2 for melting zinc ingots into high-temperature zinc liquid. The bottom of the zinc melting furnace 2 is higher than the bottom of the galvanizing pot 1, which facilitates the smooth flow of zinc liquid under gravity.

[0024] The zinc melting furnace 2 has a feed inlet 203 at the top for adding raw materials such as zinc ingots. The feed inlet 203 is equipped with a cover 204, which can be closed when no feeding is being performed to prevent heat loss and impurities from entering the zinc melting furnace 2, ensuring the smooth progress of the zinc melting process. The bottom of the zinc melting furnace 2 has a liquid outlet 201, which is equipped with a control valve 202. The control valve 202 precisely controls the flow rate of the zinc liquid, adjusting the replenishment rate according to the consumption of zinc liquid in the galvanizing pot 1, ensuring a stable zinc liquid level in the galvanizing pot 1, and improving the galvanizing quality.

[0025] A flow channel 3 is provided between the galvanizing pot 1 and the zinc melting furnace 2, located below the liquid outlet 201. The flow channel 3 extends downward along the direction of zinc liquid flow to ensure that zinc liquid can flow smoothly from the zinc melting furnace 2 into the galvanizing pot 1.

[0026] The galvanizing pot 1 is equipped with a buffer chamber 5 on its exterior. The buffer chamber 5 is connected to the galvanizing pot 1 through a channel 4 formed on the galvanizing pot 1. The bottom wall of the channel 4 and the bottom wall of the buffer chamber 5 are both lower than the zinc liquid level in the galvanizing pot 1. The bottom end of the guide channel 3 is placed on top of the buffer chamber 5, allowing the zinc liquid in the zinc melting furnace 2 to flow into the buffer chamber 5 through the guide channel 3, and then into the galvanizing pot 1 through the channel 4. This helps to slow down the flow of high-temperature zinc liquid into the galvanizing pot 1, avoid fluctuations caused by the temperature difference between the zinc liquid in the furnace and the galvanizing pot 1, and ensure the uniformity and surface quality of the strip coating.

[0027] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0028] Example 2

[0029] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:

[0030] like Figure 1 , Figure 2 As shown, mounting boxes 6 are provided on both sides of the zinc melting furnace 2, and the mounting boxes 6 are connected to the zinc melting furnace 2 by fixing rods 7. This not only provides stable support for the zinc melting furnace 2, but also facilitates the installation and maintenance of the zinc melting furnace 2, improving the reliability and service life of the device.

[0031] The zinc melting furnace 2 includes an outer shell layer, an insulation layer, and an inner shell layer arranged sequentially from the outside in. The insulation layer can effectively reduce heat loss, improve the energy utilization efficiency of the zinc melting furnace 2, reduce production costs, and at the same time ensure the temperature of the zinc liquid inside the zinc melting furnace 2 is stable, which is conducive to the smooth progress of the galvanizing process.

[0032] The bottom wall of the buffer chamber 5 is flush with the bottom wall of the through groove 4, which makes the flow of zinc liquid between the buffer chamber 5 and the galvanizing pot 1 smoother, avoiding the problem of zinc liquid stagnation or poor flow caused by the height difference of the bottom wall, and further improving the efficiency and stability of zinc liquid replenishment.

[0033] The flow guiding channel 3 has a semi-circular tubular structure, and its outer wall is covered with a refractory groove 8. The semi-circular tubular structure of the flow guiding channel 3 has good flow guiding performance and can effectively guide the flow of zinc liquid. The refractory groove 8 improves the high-temperature resistance of the flow guiding channel 3, extends its service life, and ensures the stable operation of the device in high-temperature environments.

[0034] Example 3

[0035] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:

[0036] like Figure 1 , Figure 2 As shown, the guide channel 3 is made of zinc. The zinc-based guide channel 3 has good corrosion resistance and compatibility with molten zinc, effectively reducing the chemical reaction between the molten zinc and the inner wall of the guide channel 3 during flow, thus ensuring the quality of the molten zinc. Furthermore, even if the molten zinc solidifies on the inner wall of the guide channel 3 while flowing through it, the entire guide channel 3 can be directly immersed in the zinc melting furnace 2, improving the reusability of the guide channel 3.

[0037] like Figure 3 As shown, the end of the guide channel 3 located below the outlet 201 is an enlarged section 301. The enlarged section 301 can effectively slow down the flow rate of the zinc liquid when it flows out of the outlet 201, which can not only allow the zinc liquid to transition smoothly before entering the buffer chamber 5, but also prevent the zinc liquid from directly splashing into the guide channel 3, reducing the impact force when the zinc liquid flows into the galvanizing pot 1, and improving the stability of the galvanizing process.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An overflow-type zinc liquid replenishment device for a strip steel galvanizing pot, comprising a galvanizing pot (1) for holding zinc liquid and hot-dip galvanizing, and a zinc melting furnace (2) for melting zinc ingots into high-temperature zinc liquid, wherein the bottom of the zinc melting furnace (2) is higher than the bottom of the galvanizing pot (1), the bottom of the zinc melting furnace (2) is provided with a liquid outlet (201), and a guide channel (3) is provided between the galvanizing pot (1) and the zinc melting furnace (2) located below the liquid outlet (201), and the guide channel (3) extends downwardly along the direction of zinc liquid flow, characterized in that: The galvanizing pot (1) is provided with a buffer chamber (5) on the outside. The buffer chamber (5) is connected to the galvanizing pot (1) through a channel (4) opened on the galvanizing pot (1). The bottom wall of the channel (4) and the bottom wall of the buffer chamber (5) are both lower than the zinc liquid level in the galvanizing pot (1). The bottom end of the guide channel (3) is placed on the top of the buffer chamber (5), so that the zinc liquid in the zinc melting furnace (2) flows into the buffer chamber (5) through the guide channel (3) and then enters the galvanizing pot (1) through the channel (4).

2. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The top of the zinc melting furnace (2) is provided with a feed inlet (203), and a cover (204) is provided on the feed inlet (203).

3. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: A control valve (202) is provided on the liquid outlet (201).

4. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The zinc melting furnace (2) is provided with mounting boxes (6) on both sides, and the mounting boxes (6) are connected to the zinc melting furnace (2) by fixing rods (7).

5. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The zinc melting furnace (2) includes an outer shell layer, an insulation layer and an inner shell layer arranged sequentially from the outside to the inside.

6. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The bottom wall of the buffer chamber (5) is flush with the bottom wall of the through groove (4).

7. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The flow channel (3) is a semi-circular tubular structure, and the outer wall of the flow channel (3) is covered with a fire-resistant groove (8).

8. The overflow zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 7, characterized in that: The material of the flow channel (3) is zinc.

9. The overflow-type zinc liquid replenishment device for a strip steel galvanizing pot as described in claim 1, characterized in that: The flow channel (3) is located at one end below the liquid outlet (201), which is an enlarged part (301).

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