A device for switching a galvanizing line to an annealing line

Abstract

The utility model discloses a device of galvanizing line switches to annealing line is provided with first auxiliary deflector and second auxiliary deflector between zinc pot and furnace nose, first auxiliary deflector and second auxiliary deflector are started when needing switching, and the strip steel of original galvanizing line is directly conveyed to furnace nose through the deflection effect of first auxiliary deflector and second auxiliary deflector, and switches to annealing line through the export end of furnace nose, the utility model discloses the path of strip steel from zinc pot becomes not through zinc pot, and directly switches from the position of auxiliary deflector, realizes the efficient switching effect of galvanizing line to annealing line, and the switching device structure provided by the application is low in cost and very convenient to operate, and is very suitable as the tool of switching from original continuous galvanizing line to continuous annealing line in the steel band mixed production line of galvanizing line and continuous annealing line.

Description

Technical Field

[0001] This utility model belongs to the field of steel strip mixed production line production of galvanizing line and continuous annealing line, and specifically relates to a device for switching galvanizing line to annealing line. Background Technology

[0002] In a mixed production line for steel strip consisting of galvanizing and continuous annealing lines, a switching process is required to quickly transition the steel strip from the original galvanizing line to the continuous annealing line. However, in existing technologies, this switching process requires multiple measures: including removing equipment such as the submerged rollers from the zinc pot, adding two sets of roller sets outside the zinc pot, and adjusting the distance and level stability between the two guide rollers after the roller sets are adjusted, all of which consume a significant amount of time.

[0003] Therefore, the applicant urgently needs a device for switching a galvanizing line to an annealing line. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a device for switching from a galvanizing line to an annealing line, which changes the path of the strip steel from the zinc pot to a path that bypasses the zinc pot and switches directly from the position of the auxiliary turning roller, thus achieving a highly efficient switching effect from the galvanizing line to the annealing line. At the same time, the switching device provided by this application has a low structural cost and is very easy to operate, making it very suitable as a tool for switching from the original continuous galvanizing line to the continuous annealing line in a steel strip mixed production line of galvanizing line and continuous annealing line.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A device for switching a galvanizing line to an annealing line, the galvanizing line including a submerged roller located inside a zinc pot and a furnace nose located above the zinc pot, with a first auxiliary turning roller and a second auxiliary turning roller spaced apart between the zinc pot and the furnace nose; the second auxiliary turning roller is located between the first auxiliary turning roller and the furnace nose; when switching is required, the first auxiliary turning roller and the second auxiliary turning roller are activated, and the strip steel from the original galvanizing line is directly conveyed to the furnace nose by the turning action of the first auxiliary turning roller and the second auxiliary turning roller, and switched to the annealing line through the outlet end of the furnace nose.

[0007] Preferably, the first auxiliary steering roller and the second auxiliary steering roller are located above the zinc pot, and the first auxiliary steering roller and the second auxiliary steering roller are spaced apart in the horizontal direction.

[0008] Preferably, the first auxiliary steering roller is located directly above the submerged roller installation position inside the zinc pot; the strip of the original galvanizing line is conveyed vertically downwards until it reaches the first auxiliary steering roller, thus achieving a horizontal turn.

[0009] Preferably, the furnace nose is located above and to the right of the second auxiliary steering roller, wherein the strip is conveyed in an upward inclined direction within the furnace nose.

[0010] Preferably, both the first auxiliary steering roller and the second auxiliary steering roller are made of 42CrMo material and processed after heat treatment, and their surfaces are sandblasted and chrome-plated.

[0011] Preferably, the first auxiliary steering roller and the second auxiliary steering roller are respectively mounted on the mounting brackets of the galvanized line; wherein each mounting bracket is welded from Q355 structural steel.

[0012] Preferably, a stainless steel baffle is installed below the bearings of the first auxiliary steering roller and / or the second auxiliary steering roller to isolate the heat from the zinc pot and to maintain the life of the bearings.

[0013] Preferably, a furnace nose narrowing structure is installed near the furnace nose outlet of the second auxiliary steering roller, and the furnace nose narrowing structure is detachably installed at the furnace nose outlet.

[0014] Preferably, the annealing line is equipped with a water quenching box, and the water quenching box is connected to a water tank; when the strip steel of the original galvanizing line is switched to the annealing line, the water quenching box is transferred to the water tank for temporary storage by a water pump; when there is no need to switch, the water in the water tank is returned to the water quenching box by a water pump.

[0015] Preferably, the outlet of the annealing line is connected to a finishing machine, a tension leveling machine, and an oiling machine. After the annealed strip is finished, tension leveled, and oiled, it is used to improve the rust resistance of the strip coils produced by the continuous annealing line.

[0016] This application proposes a dedicated device for switching a galvanizing line to an annealing line. This is achieved by installing a first auxiliary turning roller and a second auxiliary turning roller spaced apart between the zinc pot and the furnace nose, with the second auxiliary turning roller positioned between the first auxiliary turning roller and the furnace nose. When switching is required, the submerged roller is stopped, and the first and second auxiliary turning rollers are simultaneously activated for turning. The strip from the original galvanizing line is directly conveyed to the furnace nose via the turning action of the first and second auxiliary turning rollers, and then switched to the annealing line at the furnace nose's outlet. This achieves a highly efficient switching effect from the galvanizing line to the annealing line. Comparative implementation shows that the switching adjustment time has been reduced from approximately 8 hours in the prior art to less than 1 hour in this application, enabling efficient and rapid switching. The path of the strip from the zinc pot is changed to bypass the zinc pot and switch directly from the position of the auxiliary turning rollers. Furthermore, the switching device provided in this application has a low structural cost and is very easy to operate, making it ideal as a tool for switching from a continuous galvanizing line to a continuous annealing line in a mixed production line of steel strip where galvanizing and continuous annealing lines coexist. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operating state of the strip steel on the galvanized line without the switching device provided in this embodiment;

[0018] Figure 2 yes Figure 1 This embodiment includes a schematic diagram of the strip steel operating state after the switching device is installed;

[0019] Figure 3 This is a schematic diagram of the structure in this embodiment where stainless steel baffles are installed below the bearings of the first auxiliary steering roller and the second auxiliary steering roller. Detailed Implementation

[0020] This utility model discloses a device for switching a galvanizing line to an annealing line. The galvanizing line includes a submerged roller located inside a zinc pot and a furnace nose located above the zinc pot. A first auxiliary turning roller and a second auxiliary turning roller are arranged at intervals between the zinc pot and the furnace nose. The second auxiliary turning roller is located between the first auxiliary turning roller and the furnace nose. When switching is required, the first auxiliary turning roller and the second auxiliary turning roller are activated. The strip steel from the original galvanizing line runs directly upward through the turning action of the first auxiliary turning roller and the second auxiliary turning roller and is transported to the furnace nose. It is then switched to the annealing line through the outlet end of the furnace nose.

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] Please see Figure 1 As shown, the galvanizing line includes a submerged roller 1 located inside the zinc pot, and a furnace nose 2 located above the zinc pot (a known structure, not shown in the figure); please see further details. Figure 2As shown, this embodiment proposes a device for switching a galvanizing line to an annealing line. A first auxiliary steering roller 3a and a second auxiliary steering roller 3b are spaced apart between the zinc pot and the furnace nose 2. The second auxiliary steering roller 3b is located between the first auxiliary steering roller 3a and the furnace nose 2. When switching is required, the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are activated. The strip 4 from the original galvanizing line is directly conveyed to the furnace nose 2 by the steering action of the first auxiliary steering roller 3a and the second auxiliary steering roller 3b, and then switched to the annealing line at the outlet end of the furnace nose 2. Preferably, in this embodiment, the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are quickly installed and positioned using positioning bolts welded to the galvanizing line during installation, ensuring that each auxiliary steering roller 3a, 3b is installed in the expected position. These are conventional technical means that can be used by those skilled in the art based on the content described in this application, and this embodiment will not elaborate on them.

[0023] Preferably, in this embodiment, the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are respectively located above the zinc pot, and the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are distributed at intervals in the horizontal direction. It should be noted that in this embodiment, the installation direction of the first auxiliary steering roller 3a and the second auxiliary steering roller 3b is pre-adjusted before installation to reduce adjustment time.

[0024] Preferably, in this embodiment, the first auxiliary steering roller 3a is located directly above the installation position of the submerged roller 1 inside the zinc pot; the original galvanized steel strip 4 is conveyed vertically downwards until it reaches the first auxiliary steering roller 3a, thus achieving a horizontal turn.

[0025] Preferably, in this embodiment, the furnace nose 2 is located above and to the right of the second auxiliary steering roller 3b, wherein the strip is conveyed in an upward inclined direction within the furnace nose 2.

[0026] Preferably, in this embodiment, both the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are made of 42CrMo material and processed after heat treatment, and their surfaces are sandblasted and chrome-plated to minimize wear.

[0027] Preferably, in this embodiment, the first auxiliary steering roller 3a and the second auxiliary steering roller 3b are respectively mounted on the mounting brackets of the galvanized line; wherein, each mounting bracket is welded from Q355 structural steel; in order to ensure that no deformation occurs, all of them are subjected to stress relief treatment to ensure that no deformation occurs in actual production.

[0028] Preferably, please see further details. Figure 3As shown, in this embodiment, stainless steel baffles 5a and 5b are respectively installed below the bearings of the first auxiliary steering roller 3a and the second auxiliary steering roller 3b to isolate the heat of the zinc pot and to maintain the life of the bearings.

[0029] Because it is difficult to control the excessive flow of atmosphere from inside the furnace to outside the furnace at the outlet of the furnace nose 2 in the existing galvanizing line, it is difficult to ensure the stability of the atmosphere inside the furnace. The instability of the atmosphere inside the furnace can cause abnormalities such as oxidation of the steel strip surface. Preferably, in this embodiment, a furnace nose narrowing structure 2a is installed at the outlet of the furnace nose 2 near the second auxiliary steering roller 3b. The furnace nose narrowing structure 2a is detachably installed at the outlet of the furnace nose 2. When the production line is switched, a narrow outlet is achieved, which reduces the contact between the steel strip and the air, while ensuring the stability of the furnace temperature. When there is no need for switching, the furnace nose narrowing structure 2a can be removed from the outlet of the furnace nose 2 and restored to the original shape of the furnace nose 2.

[0030] It should be noted that, in this embodiment, when switching, it is recommended to adjust and control the temperature of the furnace area, and reduce the temperature to below 180°C before exiting the furnace to avoid excessive temperature oxidation of the steel coil surface.

[0031] Preferably, in this embodiment, the annealing line is equipped with a water quenching box (a known structure, not shown), and a water tank is installed and connected to the water quenching box; when the strip steel of the original galvanizing line is switched to the annealing line, the water quenching box is transferred to the water tank for temporary storage by a water pump; when there is no need to switch, the water in the water tank is returned to the water quenching box by a water pump.

[0032] Preferably, in this embodiment, the outlet of the annealing line is connected to a finishing machine (a known structure, not shown), a tension leveler (a known structure, not shown), and an oiling machine (a known structure, not shown). The annealed strip is then finished, tension leveled, and oiled to improve the rust resistance of the strip coils produced by the continuous annealing line. More preferably, in this embodiment, the finishing machine uses bright rollers for finishing to ensure good finishing effect and high surface reflectivity. It generally uses a finishing force mode while ensuring an elongation of 0.5% or higher. More preferably, in this embodiment, the tension leveler uses a tension mode for tension leveling, generally ensuring a tension leveling elongation of 0.3% or higher to ensure good strip shape of the produced strip.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for switching a galvanizing line to an annealing line, the galvanizing line comprising a submerged roller located inside a zinc pot and a furnace nose located above the zinc pot, characterized in that, A first auxiliary turning roller and a second auxiliary turning roller are provided at intervals between the zinc pot and the furnace nose; the second auxiliary turning roller is located between the first auxiliary turning roller and the furnace nose; when switching is required, the first auxiliary turning roller and the second auxiliary turning roller are turned on, and the strip steel of the original galvanizing line is directly transported to the furnace nose by the turning action of the first auxiliary turning roller and the second auxiliary turning roller, and then switched to the annealing line through the outlet end of the furnace nose.

2. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, The first auxiliary steering roller and the second auxiliary steering roller are respectively located above the zinc pot, and the first auxiliary steering roller and the second auxiliary steering roller are spaced apart in the horizontal direction.

3. The device for switching from a galvanizing line to an annealing line according to claim 2, characterized in that, The first auxiliary steering roller is located directly above the submerged roller installation position inside the zinc pot; the strip steel of the original galvanizing line is conveyed vertically downwards until it reaches the first auxiliary steering roller, thus achieving a horizontal turn.

4. The device for switching from a galvanizing line to an annealing line according to claim 3, characterized in that, The furnace nose is located above and to the right of the second auxiliary steering roller, wherein the strip is conveyed in an upward inclined direction within the furnace nose.

5. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, Both the first and second auxiliary steering rollers are made of 42CrMo material and processed after heat treatment, and their surfaces are sandblasted and chrome-plated.

6. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, The first auxiliary steering roller and the second auxiliary steering roller are respectively mounted on the mounting brackets of the galvanized line; wherein each mounting bracket is welded from Q355 structural steel.

7. The apparatus for switching a galvanizing line to an annealing line according to claim 1 or 6, characterized in that, A stainless steel baffle is installed below the bearing of the first auxiliary steering roller and / or the second auxiliary steering roller to isolate the heat of the zinc pot and to maintain the life of the bearing.

8. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, A furnace nose narrowing structure is installed near the furnace nose outlet of the second auxiliary steering roller, and the furnace nose narrowing structure is detachably installed at the furnace nose outlet.

9. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, The annealing line is equipped with a water quenching box, which is connected to a water tank. When the strip steel from the original galvanizing line is switched to the annealing line, the water quenching box is transferred to the water tank for temporary storage by a water pump. When there is no need to switch, the water in the water tank is returned to the water quenching box by a water pump.

10. The device for switching a galvanizing line to an annealing line according to claim 1, characterized in that, The annealing line is connected to a finishing machine, a tension leveling machine, and an oiling machine at its outlet. After the annealed strip is finished, tension leveled, and oiled, it is used to improve the rust resistance of the strip coils produced by the continuous annealing line.

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