Overflow groove and galvanizing production line

Abstract

The utility model discloses an overflow groove and a galvanizing production line, and the overflow groove comprises a main body plate, a bottom plate, an end plate and a slag discharge pipe; the two end plates are oppositely arranged in the first direction. The number of the main body plates is two, the two main body plates are oppositely arranged in the second direction and are connected to the bottom plate, an included angle is formed between the first direction and the second direction, the main body plates are connected to the end plate, the end plate, the bottom plate and the main body plates define a groove body with an opening, and the groove body is arranged in a zinc pot; one end of the deslagging pipe is communicated with the tank body, and the other end extends out of the zinc pot; wherein the bottom plate and the two main body plates are of an integrated structure. According to the overflow groove, the bottom plate and the two main body plates are of the integrated structure, so that the machining stress of the bent position is far smaller than that of the overflow groove formed through splicing, the situation that the overflow groove is located in zinc liquid for a long time and is affected by high temperature and corrosion to deform is avoided, and therefore the service life of the overflow groove is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cold-rolled strip steel production, and particularly relates to an overflow tank and a galvanizing production line. BACKGROUND

[0002] With the increase of production and high-end users, the quality of outer plates and batch production capacity of hot-dip galvanized automobile plates are increasingly required, and a kind of deslagging overflow tank structure is born. This kind of technology is to continuously replace the zinc liquid in the furnace nose, and discharge the zinc slag, zinc ash and other impurities in the zinc liquid to improve the purity of the zinc liquid.

[0003] In the prior art, the overflow tank is completed by plate assembly welding. After welding, there is machining stress, and the working environment of the overflow tank is poor, which is long-term immersed in high-temperature zinc liquid (455 DEG C). Therefore, the welding part of the overflow tank is easily affected by temperature and corrosion to produce deformation, which affects the service life of the overflow tank. Therefore, it is a technical problem to be solved by those skilled in the art to invent a simple and stable overflow tank. SUMMARY

[0004] To solve the above technical problems, the application provides an overflow tank to solve the technical problem that the assembly-welded overflow tank in the prior art is easily deformed when being in high-temperature zinc liquid for a long time, thereby reducing the service life of the overflow tank.

[0005] The technical scheme adopted to achieve the purpose of the application is as follows:

[0006] An overflow tank is used to be placed in a zinc pot to discharge impurities on the surface of zinc liquid in the zinc pot. The overflow tank comprises:

[0007] Two end plates are provided and oppositely arranged along a first direction;

[0008] A bottom plate and two main plates are oppositely arranged along a second direction, and are connected to the bottom plate. The first direction and the second direction have an included angle. The main plates are connected to the end plates. The end plates, the bottom plate and the main plates enclose a tank body with an opening;

[0009] A deslagging pipe is connected to one end of the tank body and extends out of the zinc pot;

[0010] The bottom plate and the two main plates are of an integral structure.

[0011] In order to better achieve the application, the tank body is provided with a reinforcing rib, and the two ends of the reinforcing rib are connected to the two main plates.

[0012] In order to better realize the present application, the distance between the reinforcing rib and the bottom plate is less than 1 / 2 of the height of the main plate, and the height of the reinforcing rib is greater than the height of the end of the slag discharge pipe communicating with the groove body.

[0013] In order to better realize the present application, the number of reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged at equal intervals along the length direction of the groove body.

[0014] In order to better realize the present application, the surfaces of the main plate, the bottom plate and the end plate are provided with wear-resistant coatings.

[0015] In order to better realize the present application, the side of the main plate away from the bottom plate is provided with an overflow plate.

[0016] In order to better realize the present application, the overflow plate comprises a first blade surface and a second blade surface, one side of the first blade surface is connected with the main plate, the side of the first blade surface away from the main plate is inclined from the outer side wall of the main plate to the middle part of the groove body, and the included angle between the first blade surface and the main plate is 40°.

[0017] One side of the second blade surface is connected with the main plate, the side of the second blade surface away from the main plate is inclined from the inner side wall of the main plate to the direction of the first blade surface, the included angle between the second blade surface and the main plate is 60°, and the side of the first blade surface away from the main plate is connected with the side of the second blade surface away from the main plate through a blade edge plane to form a blade edge.

[0018] In order to better realize the present application, the width of the overflow plate is 2mm.

[0019] In order to better realize the present application, the thickness of the end plate is greater than the thickness of the main plate.

[0020] On the other hand, the present application also provides a galvanizing production line, which comprises a zinc pot, a slag discharge pump and the overflow tank, the groove body in the overflow tank is arranged in the zinc pot, and the opening of the groove body is lower than the height of the zinc liquid level in the zinc pot.

[0021] The slag discharge pump is arranged outside the zinc pot, and the end of the slag discharge pipe away from the groove body communicates with the slag discharge pump.

[0022] As can be seen from the above technical solution, the bottom plate and the two main plates in the overflow tank provided in this application are an integral structure, which makes the processing stress at the bending point much less than the processing stress of the spliced ​​overflow tank, so as to avoid the overflow tank from being deformed due to high temperature and corrosion in the zinc liquid for a long time, thereby ensuring the service life of the overflow tank. Attached Figure Description

[0023] Figure 1 A schematic diagram of an overflow channel provided in this application;

[0024] Figure 2 A cross-sectional view of an overflow channel provided in this application;

[0025] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0026] Figure 4 This is a schematic diagram of a galvanizing production line provided in this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Main body plate; 2-Bottom plate; 3-End plate; 4-Reinforcing rib; 5-Overflow plate; 51-First cutting edge; 52-Second cutting edge; 53-Cutting edge plane; 6-Slag discharge pipe; 7-Zinc pot. Detailed Implementation

[0029] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the embodiments of this application, such as Figures 1 to 4 As shown: The overflow trough includes a main plate 1, a bottom plate 2, an end plate 3, and a slag discharge pipe 6;

[0031] There are two end plates 3, and the two end plates 3 are arranged opposite to each other along the first direction;

[0032] There are two main body plates 1. The two main body plates 1 are arranged opposite each other along the second direction and are both connected to the bottom plate 2. The first direction and the second direction have an included angle. The main body plates 1 are connected to the end plates 3. The end plates 3, the bottom plate 2 and the main body plates 1 together form a groove with an opening.

[0033] One end of the slag discharge pipe 6 is connected to the tank body, and the other end extends out of the zinc pot 7. The bottom plate 2 and the two main plates 1 are an integral structure to reduce the processing stress of the tank body, so that it can work in the zinc liquid for a long time without deformation.

[0034] The groove body can be a stamping integrated groove body or a cast integrated groove body. The stamping integrated groove body can eliminate a large amount of machining stress through aging movement and heat treatment, so that the machining stress of the integrated groove body is far lower than that of a spliced overflow tank, and the service life of the overflow tank can be greatly improved in use. The cast integrated groove body has no machining stress at the bending part, and the service life of the overflow tank can be greatly improved in use.

[0035] It is worth noting that the spliced overflow tank cannot achieve the stress-eliminating effect of the integrated groove body due to the presence of the weld seam, and the effect of eliminating the machining stress through aging movement and heat treatment is not ideal.

[0036] In addition, the overflow tank can work in zinc liquid for a long time without deformation, the position of the overflow edge is relatively fixed, the liquid level in the groove body and the liquid level in the zinc pot are kept at a relatively stable and uniform liquid level difference, so that the deslagging effect of the overflow tank is ensured.

[0037] When installed, the groove body is installed in the zinc pot, and the opening of the groove body is slightly lower than the liquid level of the zinc liquid, so that the liquid level in the groove body and the liquid level in the zinc pot are kept at a relatively stable and uniform liquid level difference.

[0038] During work, the zinc dregs, zinc ash and other impurities floating on the zinc liquid in the strip steel production line flow into the interior of the overflow tank through the opening, and are discharged outside the zinc pot under the action of the deslagging pump, so as to achieve the effect of filtering the zinc liquid and always ensure the good purity of the zinc liquid in the strip steel production line.

[0039] In some embodiments, the groove body is provided with a reinforcing rib 4, and the two ends of the reinforcing rib 4 are connected to the two main body plates 1 respectively, so as to further improve the stability of the structure of the overflow tank. Preferably, the distance between the reinforcing rib 4 and the bottom plate 2 is less than 1 / 2 of the height of the main body plate 1, and the height at which the reinforcing rib 4 is located is greater than the height of one end of the deslagging pipe 6 communicated with the groove body.

[0040] The zinc ash, zinc dregs and other impurities entering the groove body are hung on the reinforcing rib 4 and are easily flushed out of the groove body, so as to avoid the occurrence of dregs on the reinforcing rib 4, and ensure the overflow effect of the overflow tank.

[0041] In the prior art, the reinforcing rib in the interior of the overflow tank is located in the middle of the main body plate, and the zinc ash, zinc dregs and other impurities are easily hung on the reinforcing rib after entering the overflow tank, and are not easily flushed, so that the surface of the reinforcing rib is prone to dregs.

[0042] The overflow tank provided in the embodiment moves the reinforcing rib 4 downward, so that the reinforcing rib 4 is located at a position lower than the middle of the main body plate 1, as shown in Figure 2The structure strength of the tank can still be ensured, and the zinc slag and zinc ash floating on the surface of the zinc liquid are not easily attached to the reinforcing rib 4. Even if a small amount of zinc slag and zinc ash is attached, the zinc liquid continuously flowing into the overflow tank can easily flush the attached zinc slag and zinc ash off the reinforcing rib 4, reducing the possibility of slagging and ensuring good overflow effect of the overflow tank.

[0043] In some embodiments, the reinforcing rib 4 has a plurality of reinforcing ribs 4 arranged at equal intervals along the length direction of the tank, and the length direction of the reinforcing rib 4 is perpendicular to the main plate 1, so as to further improve the structure strength of the overflow tank.

[0044] In some embodiments, the main plate 1, the bottom plate 2 and the end plate 3 are provided with wear-resistant coatings on the surfaces thereof, so as to improve the service life of the overflow tank.

[0045] It is worth noting that the existing overflow tank is designed only with a sand blasting + hole sealing process technology. Under the long-term flushing of the zinc liquid, the overflow edge is prone to corrosion notches, directly affecting the overall overflow effect. In the present embodiment, wear-resistant coatings are provided on the surfaces of the main plate 1, the bottom plate 2 and the end plate 3, so as to reduce the corrosion problem of the overflow edge in the overflow tank.

[0046] In some embodiments, the main plate 1 is provided with an overflow plate 5 away from the bottom plate 2; wherein,

[0047] The overflow plate 5 is provided with a first blade surface 51 and a second blade surface 52 on both sides thereof, respectively, as shown in Figure 3 One side of the first blade surface 51 is connected with the main plate 1, and the side of the first blade surface 51 away from the main plate 1 is inclined from the outer side wall of the main plate 1 to the middle part of the tank, and the included angle between the first blade surface 51 and the main plate 1 is 40°.

[0048] One side of the second blade surface 52 is connected with the main plate 1, and the side of the second blade surface 52 away from the main plate 1 is inclined from the inner side wall of the main plate 1 to the direction of the first blade surface 51, and the included angle between the second blade surface 52 and the main plate 1 is 60°, and the side of the first blade surface 51 away from the main plate 1 is connected with the side of the second blade surface 52 away from the main plate 1 through a blade edge plane 53 to form a blade edge.

[0049] In the working process of the overflow tank, there is a relative liquid level difference between the zinc liquid in the zinc pot and the zinc liquid in the overflow tank. The zinc liquid in the zinc pot flows into the overflow tank through the blade edge of the overflow tank. The double-bevel blade edge formed by the first blade surface 51 and the second blade surface 52 can effectively improve the overflow effect. In the production process, the blade edge is polished smooth to avoid the attachment of impurities at the blade edge.

[0050] In some embodiments, the width of the overflow plate 5 is 2 mm.

[0051] In some embodiments, the overflow plate 5 and the main plate 1 are integrally formed components.

[0052] In some embodiments, the thickness of the end plate 3 is greater than the thickness of the main plate 1, so as to further improve the stability of the structure of the overflow tank.

[0053] Based on the overflow tank described above, the application further provides a galvanizing production line, which comprises a zinc pot 7, a slag discharge pump and the overflow tank described above, as shown in Figure 4 The tank body in the overflow tank is arranged in the zinc pot 7, and the opening of the tank body is lower than the height of the zinc liquid surface in the zinc pot 7.

[0054] The slag discharge pump is arranged outside the zinc pot 7, and the end of the slag discharge pipe 6 away from the tank body is in communication with the slag discharge pump.

[0055] Through tests, the yield of the overflow tank provided by the application is 10,000 tons before being put into use, the protocol yield of zinc slag is reduced by 0.8% after the overflow tank provided by the application is used, the surface quality is improved, and the price difference of the downgraded and qualified products per ton of steel is 600 yuan. Therefore, the economic benefits increased per year due to the reduction of the protocol yield are:

[0056] The average monthly yield x the reduction of the yield of the qualified products x the price difference per ton of steel x the time = 10,000 tons / month x 0.8% x 600 yuan / ton x 12 months / year = 57.6 million / year

[0057] The production line speed is increased by 5 m / min, and the average specification is 0.8 x 1250 mm. Due to the increase of the yield, the economic benefits increased are:

[0058] The average monthly increase of the yield x the benefit per ton of steel x the time = 0.8 x 1250 x 5 / 1000 / 1000 x 7.85 x 60 x 24 x 15 tons / month x 600 yuan / ton x 12 months / year = 610.4 million / year

[0059] The economic benefits per year can reach 6.68 million yuan.

[0060] Social benefits:

[0061] The product quality is obviously improved, and the users are satisfied and recognized, and the application has the ability to continuously and stably produce high-level surface galvanized automobile plates, which opens up a broad prospect for the field of automobile plates.

[0062] Through the above embodiments, the application has the following beneficial effects or advantages:

[0063] 1) The main plate 1 and the bottom plate 2 in the overflow tank are integrally formed components, which reduces the processing stress of the tank body, so as to avoid the deformation of the overflow tank due to long-time immersion in the zinc liquid, thereby ensuring the service life of the overflow tank.

[0064] 2)The distance between the reinforcing rib 4 in the overflow tank and the bottom plate 2 is less than 1 / 2 of the height of the main plate 1, so that the zinc ash, zinc slag and other sundries entering the overflow tank are easily washed and discharged from the overflow tank after being hung on the reinforcing rib 4, avoiding the occurrence of slagging on the reinforcing rib 4, so as to ensure the overflow effect of the overflow tank.

[0065] 3)The surfaces of the main plate 1, the bottom plate 2 and the end plate 3 in the overflow tank are provided with wear-resistant coating, which can reduce the occurrence of corrosion and other conditions of the overflow tank under long-term washing of the zinc liquid, so as to improve the service life of the overflow tank.

[0066] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0067] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A spillover tank for placement within a zinc pot (7) to remove impurities from the surface of the zinc bath within the zinc pot (7), characterised in that, The overflow tank comprises: two end plates (3) arranged opposite to each other along a first direction; a bottom plate (2) and two main plates (1) arranged opposite to each other along a second direction, and connected to the bottom plate (2), the first direction and the second direction having an included angle, the main plates (1) being connected to the end plates (3), the end plates (3), the bottom plate (2) and the main plates (1) forming a tank body with an opening; a slag discharge pipe (6) having one end communicated with the tank body and the other end extending out of the zinc pot (7); wherein the bottom plate (2) and the two main plates (1) are of an integrated structure.

2. The overflow tank of claim 1, wherein The tank body is provided with reinforcing ribs (4), and the two ends of each reinforcing rib (4) are connected to the two main plates (1) respectively.

3. The overflow tank of claim 2, wherein, The distance between the reinforcing ribs (4) and the bottom plate (2) is less than 1 / 2 of the height of the main plates (1), and the height of the reinforcing ribs (4) is greater than the height of the end of the slag discharge pipe (6) communicated with the tank body.

4. The overflow tank of claim 3, wherein There are multiple reinforcing ribs (4) arranged along the length direction of the tank body at equal intervals.

5. The overflow tank according to any one of claims 1 to 4, characterized in that The surfaces of the main plates (1), the bottom plate (2) and the end plates (3) are provided with wear-resistant coatings.

6. The overflow tank of claim 1, wherein The side of the main plate (1) away from the bottom plate (2) is provided with an overflow plate (5).

7. The overflow tank of claim 6, wherein The overflow plate (5) comprises a first blade surface (51) and a second blade surface (52), one side of the first blade surface (51) is connected to the main plate (1), the side of the first blade surface (51) away from the main plate (1) is inclined from the outer side wall of the main plate (1) to the middle part of the tank body, and the included angle between the first blade surface (51) and the main plate (1) is 40°. One side of the second blade surface (52) is connected to the main plate (1), the side of the second blade surface (52) away from the main plate (1) is inclined from the inner side wall of the main plate (1) to the direction of the first blade surface (51), the included angle between the second blade surface (52) and the main plate (1) is 60°, and the side of the first blade surface (51) away from the main plate (1) is connected to the side of the second blade surface (52) away from the main plate (1) through a blade edge plane (53) to form a blade edge.

8. The overflow tank of claim 6, wherein, The width of the overflow plate (5) is 2 mm.

9. The overflow tank of claim 1, wherein, The thickness of the end plate (3) is greater than the thickness of the main plate (1).

10. A galvanizing line comprising a zinc pot (7), a deslagging pump and the overflow tank according to any one of claims 1-9, characterized in that, The tank body in the overflow tank is arranged in the zinc pot (7), and the opening of the tank body is lower than the height of the liquid level of the zinc liquid in the zinc pot (7); The slag discharge pump is arranged outside the zinc pot (7), and the end of the slag discharge pipe (6) away from the tank body is communicated with the slag discharge pump.

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