Steel strip galvanizing pool

Abstract

The utility model belongs to the technical field of steel strip galvanizing, and discloses a steel strip galvanizing bath which comprises a galvanizing bath body, a carrier roller assembly and a filling device for adding zinc ingots, liquid collecting pools are fixedly arranged on the two sides, in the conveying direction of the steel belt, of the galvanizing pool body, an opening for the steel belt to pass through is formed in the galvanizing pool body and located below the liquid level of zinc liquid in the galvanizing pool body, and the zinc liquid flowing into the two liquid collecting pools from the opening circulates into the galvanizing pool body through a liquid metal pump. A liquid level sensor enabling the liquid level of zinc liquid in the liquid collecting pool to be lower than the position of the steel belt is fixedly arranged in the liquid collecting pool, and the carrier roller assembly guides the steel belt to penetrate into the liquid collecting pool on one side and penetrate out of the other liquid collecting pool after passing through the galvanizing pool body. According to the utility model, impurities cannot be attached to the steel strip during galvanization, so that the galvanization quality is improved, and the device is suitable for galvanization of the steel strip.

Description

Technical Field

[0001] This utility model belongs to the field of steel strip galvanizing technology, and relates to a galvanizing tank, specifically a steel strip galvanizing tank. Background Technology

[0002] like Figure 1 As shown, in the prior art, during galvanizing, the steel strip is immersed in the zinc bath. The steel strip needs to enter from the surface of the liquid and exit from the surface again. However, during the galvanizing process, zinc dross is generated on the surface of the zinc bath due to oxidation. The zinc dross floats on the surface of the liquid. When the steel strip enters and exits, it will come into contact with the zinc dross. Especially when the galvanizing is completed and the strip exits, the zinc dross adheres to the steel strip and forms a protrusion, which seriously affects the accuracy of the steel strip thickness. Even if the steel strip is trimmed with a scraper to ensure the thickness of the steel strip, when the scraper encounters a protrusion, it will scrape the entire protrusion off, causing the zinc layer at the protrusion location to be damaged and reducing the quality of galvanizing.

[0003] Meanwhile, in existing technologies, when adding zinc ingots to the galvanizing bath, zinc ingots are placed in a basket, the basket is hung on a crane, and the crane is used to immerse the basket below the surface of the zinc liquid. After the zinc ingots melt, the crane is removed. However, the melting of zinc ingots takes a period of time, and the number of cranes in the factory is limited. The long-term occupation of the cranes results in a waste of resources. Utility Model Content

[0004] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a steel strip galvanizing bath to reduce impurity adhesion and improve galvanizing quality during the galvanizing process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A steel strip galvanizing tank includes a galvanizing tank body and a roller assembly, and also includes a filling device for adding zinc ingots;

[0007] Both sides of the galvanizing tank body along the conveying direction of the steel strip are fixedly provided with collection tanks. The galvanizing tank body is provided with an opening for the steel strip to pass through. The opening is located below the zinc liquid level in the galvanizing tank body. The zinc liquid flowing into the two collection tanks through the opening is circulated back into the galvanizing tank body by a liquid metal pump. A liquid level sensor is fixedly provided in the collection tank to keep the liquid level of the zinc liquid in the collection tank lower than the position of the steel strip. The idler roller assembly guides the steel strip to pass through the collection tank on one side, pass through the galvanizing tank body, and exit through the other collection tank.

[0008] As a limitation of this utility model, the idler roller assembly includes idler rollers rotatably connected in the galvanizing tank body, all of which are hollow structures and have several through holes on their roller surfaces.

[0009] As a further limitation of this utility model, a heater is fixedly installed in both liquid collection tanks, and a temperature sensor is also fixedly installed therein.

[0010] As another limitation of this utility model, the filling device includes a lifting device fixed on the galvanizing tank body and a translation device fixed on the lifting device, and a basket for holding zinc ingots is fixed on the translation device.

[0011] As a limitation of this utility model, the lifting device includes two first motor screw mechanisms respectively fixed on both sides of the galvanizing tank body.

[0012] As a further limitation of this utility model, the translation device includes an optical axis fixed between the lead screw blocks of the two first motor lead screw mechanisms, a slider slidably disposed on the optical axis, and a second motor lead screw mechanism for driving the basket to move. The basket is fixed on the slider, and a drive rod for driving the basket to move along the optical axis is fixed on the lead screw nut of the second motor lead screw mechanism.

[0013] As a further limitation of this utility model, a gas collection hood for collecting waste gas is provided above the galvanizing tank body, and the gas collection hood is connected to a dust removal system through a pipeline.

[0014] As a third limitation of this utility model, the port of the pipe on the liquid metal pump that is connected to the galvanizing tank body is located below the surface of the zinc liquid.

[0015] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0016] (1) This utility model utilizes a collection tank to collect the zinc liquid flowing out of the opening, and makes the liquid level of the zinc liquid in the collection tank lower than the opening. The steel strip is located above the liquid level of the zinc liquid in the collection tank and below the liquid level of the zinc liquid in the galvanizing tank body. This ensures that the steel strip does not come into contact with the liquid level of the zinc liquid when it enters or exits. Therefore, impurities floating on the liquid surface will not adhere to the steel strip, which improves the quality of galvanizing of the steel strip. Since the opening only needs to pass through the steel strip, its thickness is small, and the liquid zinc flowing out of the galvanizing tank body has a low velocity. By using a liquid metal pump, it can be returned to the galvanizing tank body, which can reduce the loss of the liquid zinc.

[0017] (2) The heater of this utility model can ensure the temperature of the zinc liquid circulating into the galvanizing bath body and reduce the loss of zinc liquid temperature in the galvanizing bath body;

[0018] (3) The hollowed-out idler roller of this utility model can reduce the contact and friction with the steel strip, reduce the uneven galvanizing caused by the contact between the idler roller and the steel strip, and improve the quality of galvanizing.

[0019] (4) This utility model uses a lifting and translation structure to add zinc ingots to the galvanizing tank body, reducing the occupation of cranes in the factory. The translation structure can also play a stirring role, making the zinc ingots melt more evenly in the zinc liquid and preventing the element concentration around the zinc ingots from being too high.

[0020] (5) Since the device for melting zinc ingots is set on the galvanizing tank body, the space above is not occupied by the crane. Therefore, a gas collection hood can be set up to discharge the harmful gases in the zinc liquid through the dust removal system, thereby reducing environmental pollution.

[0021] In summary, this invention prevents impurities from adhering to the steel strip during galvanizing, thus improving the quality of galvanizing and making it suitable for galvanizing steel strips. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the steel belt conveyor structure in the background art of this utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the main structure of Embodiment 1 of this utility model;

[0026] Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure;

[0027] Figure 5 This is a schematic diagram of the steel belt conveyor structure in Embodiment 2 of this utility model.

[0028] In the diagram: 1. Galvanizing tank body; 2. Collection tank; 3. Opening; 4. Liquid metal pump; 5. Idler roller; 6. Liquid level sensor; 7. Temperature sensor; 8. Heater; 9. First motor lead screw mechanism; 10. Second motor lead screw mechanism; 11. Optical shaft; 12. Slider; 13. Basket; 14. Drive rod; 15. Gas collection hood; 16. Steel strip. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0030] Example 1: Galvanizing bath for steel strip

[0031] like Figure 2As shown, the system includes a galvanizing tank body 1 and a roller assembly. Two collection tanks 2 are fixed on both sides of the galvanizing tank body 1, located on either side of the galvanizing tank body 1 in the conveying direction of the steel strip 16. The galvanizing tank body 1 has an opening 3 for the steel strip 16 to pass through. The opening 3 is located below the zinc liquid surface inside the galvanizing tank body 1, allowing the two collection tanks 2 to communicate with the galvanizing tank body 1. The purpose of this application is to prevent the steel strip 16 from contacting impurities on the zinc liquid surface when immersed in the galvanizing tank body 1 during the conveying process. However, existing galvanizing tanks are groove-shaped, and when the steel strip 16 is immersed below the zinc liquid surface, it can only enter and exit through the surface of the zinc liquid, unable to avoid contact with the zinc liquid surface. This application allows the steel strip 16 to directly enter from the side of the liquid surface, without passing through the zinc liquid surface. Although the zinc liquid will flow out through the opening 3, the collection tanks 2 in this application can collect the outflowing zinc liquid and re-inject it into the galvanizing tank body 1.

[0032] The idler roller assembly includes idler rollers 5 rotatably connected to the galvanizing bath body 1. The steel strip 16 is conveyed via the idler rollers 5. In this embodiment, two idler rollers 5 are rotatably arranged inside the galvanizing bath body 1, and one idler roller 5 is rotatably arranged in each of the two collection tanks 2. The four idler rollers 5 guide the steel strip 16 through one collection tank 2, through an opening 3 into the galvanizing bath body 1, and then through another opening 3 into the other collection tank 2, where it is guided out by the idler rollers 5. The steel strip 16 remains below the zinc liquid surface throughout the entire process and does not contact the zinc liquid surface. Therefore, impurities on the zinc liquid surface will not adhere to the steel strip 16. In this embodiment, the idler rollers 5 are all hollow structures with several through holes on their surface. The zinc liquid can enter the idler rollers 5 and contact the steel strip 16 through the through holes, reducing the contact area between the idler rollers 5 and the steel strip 16 while improving the uniformity of galvanizing the steel strip 16.

[0033] like Figure 3 As shown, since opening 3 is located below the zinc liquid surface in the galvanizing bath body 1, the zinc liquid in the galvanizing bath body 1 will flow into the collection tank 2 through opening 3. To ensure that the zinc liquid in the collection tank 2 does not exceed the steel strip 16, two liquid metal pumps 4 are fixed on the galvanizing bath body 1. The two liquid metal pumps 4 are respectively connected to the two collection tanks 2 and the galvanizing bath body 1 through pipelines, and the liquid metal pumps 4 are used to pump the zinc liquid in the collection tank 2 back into the galvanizing bath body 1. The port of the pipeline on the galvanizing bath body 1 extends below the zinc liquid surface to prevent zinc liquid from splashing.

[0034] To ensure that the steel strip 16 does not come into contact with the molten zinc in the two collection tanks 2 as it passes through them, and to keep the molten zinc level in the collection tanks 2 lower than the molten zinc level in the galvanizing bath body 1, two level sensors 6 are fixedly installed in the collection tanks 2, located one near the opening 3 and the other away from the opening 3. The level sensor 6 near the opening 3 is located below the steel strip 16. The level sensors 6 and the liquid metal pump 4 are linked by a controller. The signal output terminal of the level sensor 6 is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of the liquid metal pump 4. When the molten zinc level in the collection tank 2 is higher than the level sensor 6 near the opening 3, the controller activates the liquid metal pump 4 to pump the molten zinc from the collection tank 2 into the galvanizing bath body 1. When the molten zinc level in the collection tank 2 reaches the level sensor 6 away from the opening 3, the liquid metal pump 4 stops operating.

[0035] Both collection tanks 2 are equipped with heaters 8 and temperature sensors 7. The signal output terminal of the temperature sensor 7 is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of the heater 8. When the zinc liquid in the collection tank 2 does not reach the set temperature, the heater 8 works. When the set temperature is reached, the heater 8 stops working to ensure the temperature of the zinc liquid in the collection tank 2, reduce the loss of zinc liquid temperature, and ensure the quality of zinc plating.

[0036] like Figure 2 , Figure 4 As shown, a filling device is provided on the galvanizing tank body 1. The filling device includes a lifting device fixed on the galvanizing tank body 1 and a translation device fixed on the lifting device. A basket 13 for holding zinc ingots is fixed on the translation device. The lifting device includes a first motor screw mechanism 9 located on both sides of the galvanizing tank body 1. The two sides refer to the two sides in the conveying direction of the steel strip 16. The motor of the first motor screw mechanism 9 is located above the galvanizing tank body 1.

[0037] like Figure 4As shown, the translation device includes an optical axis 11, a slider 12, and a second motor lead screw mechanism 10. There are two optical axes 11, and the two ends of the two optical axes 11 are respectively fixedly connected between the lead screw blocks of the two first motor lead screw mechanisms 9, so that the two optical axes 11 rise and fall with the lead screw blocks of the first motor lead screw mechanism 9. There are two sliders 12, which are respectively slidably sleeved on the two optical axes 11. The basket 13 is fixed on the two sliders 12, and the lower end of the basket 13 is located below the slider 12. Two second motor lead screw mechanisms 10 are provided, located on both sides of the width direction of the galvanizing tank body 1, that is, on both sides of the direction perpendicular to the conveying direction of the steel strip 16. A drive rod 14 is fixed between the lead screw blocks of the two second motor lead screw mechanisms 10. The drive rod 14 is U-shaped. The part of the drive rod 14 parallel to the liquid surface is located below the optical axis 11. When the basket 13 descends to the lowest position with the first motor lead screw mechanism 9, the second motor lead screw mechanism 10 drives the drive rod 14 to move. When the drive rod 14 moves to the position where it abuts the basket 13, it drives the basket 13 to move along the optical axis 11. The movement of the basket 13 not only allows the zinc ingot to melt to different positions of the galvanizing tank body 1, but also plays a stirring role, preventing the local element concentration from being too high and improving the uniformity of galvanizing.

[0038] A gas collection hood 15 for collecting waste gas is provided above the galvanizing tank body 1. The gas collection hood 15 is connected to a dust removal system through pipelines. The waste gas generated during the galvanizing process can enter the dust removal system through the gas collection hood 15, reducing environmental pollution.

[0039] In this embodiment, the steel strip 16 is guided by the idler roller 5 into the collection tank 2, enters the galvanizing tank body 1 through the opening 3, and then enters another collection tank 2 through another opening 3 before being guided out by the idler roller 5. The zinc liquid level in the galvanizing tank body 1 is higher than that in the collection tank 2. The steel strip 16 enters the galvanizing tank body 1 for galvanizing from between the two liquid levels, without contacting the liquid surface. The zinc liquid in the collection tank 2 is promptly returned to the galvanizing tank body 1 via the liquid metal pump 4, reducing waste. Simultaneously, when adding zinc ingots to replenish the zinc liquid, a lifting device is used to immerse the basket 13 in the zinc liquid, and a translation device is used to slowly move it within the zinc liquid. The translation device acts as a stirrer, ensuring the zinc ingots dissolve more evenly in the zinc liquid. Then, the basket 13 is lifted and reset.

[0040] Example 2: Steel Strip Galvanizing Pool

[0041] like Figure 5 As shown, the structure of this embodiment is basically the same as that of Embodiment 1. Figure 5 This is only a schematic diagram of the steel belt conveyor; the other structures are the same as those in Embodiment 1 (not shown). The difference is that the liquid collection tank 2 in this embodiment also has an opening 3, and no idler roller 5 is installed inside the liquid collection tank 2. The steel belt 16 passes through the liquid collection tank 2 at an angle and then enters the galvanizing tank body 1.

[0042] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel strip galvanizing tank, characterized in that: It includes the galvanizing tank body and the idler roller assembly, as well as a filling device for adding zinc ingots; Both sides of the galvanizing bath body along the conveying direction of the steel strip are fixedly provided with collection tanks. The galvanizing bath body is provided with an opening for the steel strip to pass through. The opening is located below the zinc liquid level in the galvanizing bath body. The zinc liquid flowing into the two collection tanks through the opening is circulated back into the galvanizing bath body by a liquid metal pump. A liquid level sensor is fixedly provided in the collection tank to keep the liquid level of the zinc liquid in the collection tank lower than the position of the steel strip. The idler roller assembly guides the steel strip to pass through the collection tank on one side, pass through the galvanizing bath body, and exit through the other collection tank.

2. The steel strip galvanizing bath according to claim 1, characterized in that: The idler assembly includes idlers rotatably connected to the galvanizing tank body. The idlers are all hollow structures and have several through holes on their surfaces.

3. The steel strip galvanizing bath according to claim 2, characterized in that: Both collection tanks are equipped with heaters and temperature sensors.

4. The steel strip galvanizing bath according to any one of claims 1-3, characterized in that: The filling device includes a lifting device fixed to the galvanizing tank body and a translation device fixed to the lifting device, with a basket for holding zinc ingots fixed on the translation device.

5. The steel strip galvanizing bath according to claim 4, characterized in that: The lifting device includes two first motor screw mechanisms respectively fixed on both sides of the galvanizing tank body.

6. The steel strip galvanizing bath according to claim 5, characterized in that: The translation device includes an optical axis fixed between the lead screw blocks of two first motor lead screw mechanisms, a slider slidably disposed on the optical axis, and a second motor lead screw mechanism for driving the basket to move. The basket is fixed on the slider, and a drive rod for driving the basket to move along the optical axis is fixed on the lead screw block of the second motor lead screw mechanism.

7. The steel strip galvanizing bath according to claim 5 or 6, characterized in that: The galvanizing tank is equipped with a gas collection hood above it for collecting waste gas, and the gas collection hood is connected to a dust removal system through pipelines.

8. The steel strip galvanizing bath according to any one of claims 1-3, 5, and 6, characterized in that: The port of the pipe on the liquid metal pump that connects to the galvanizing bath body is located below the surface of the zinc liquid.

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