Continuous pickling and annealing unit for cold-rolled strip

Abstract

The utility model relates to the technical field of stainless steel coil plate cold-rolled strip pickling annealing, in particular to a cold-rolled strip continuous pickling annealing unit which comprises a pickling device, a rotating rod is installed on one side of the pickling device, a first limiting roller is arranged on the rotating rod, and a second limiting roller is installed on one side of the first limiting roller. A water cavity is further formed in the inner side of the pickling device, a water inlet is formed in the outer side of the water cavity, an annealing device is installed on the bottom side of the pickling device, an annealing cavity is formed in the annealing device, and a heat storage plate and an annealing heater are installed in the annealing cavity. According to the stainless steel coil plate pickling device, the situation that oxide scales are not thoroughly removed in the pickling process is reduced, the possibility that a large amount of energy is consumed in the annealing period is reduced, the continuous pickling effect of the device on stainless steel coil plates is improved, the preheating effect on materials is also improved, the activity of pickling liquid is improved, and the service life of the pickling liquid is prolonged. And the removal of oxides and impurities on the metal surface is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pickling and annealing of cold-rolled strips of stainless steel coils, in particular to a continuous pickling and annealing unit for cold-rolled strips. Background Art

[0002] Stainless steel coil is a widely used material, mainly used in the construction industry, home appliance manufacturing industry and environmental protection industry. Cold-rolled strip is a metal strip made of hot-rolled coil as raw material and rolled below the recrystallization temperature at room temperature. There is a layer of iron oxide on the surface of the strip before cold rolling, which needs to be cleaned, so a cold-rolled strip continuous pickling annealing unit is required.

[0003] At present, in the process of pickling cold-rolled strips, insufficient concentration of pickling solution or insufficient pickling time may lead to incomplete removal of iron oxide scale, affecting subsequent annealing and processing, and a large amount of energy will be consumed in the annealing process, which is difficult to reuse. For this reason, a continuous pickling annealing unit for cold-rolled strips is proposed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a cold-rolled strip continuous pickling annealing unit, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cold-rolled strip continuous pickling and annealing unit comprises a pickling device, a rotating rod is installed on one side of the pickling device, a first limiting roller is arranged on the rotating rod, a second limiting roller is installed on one side of the first limiting roller, a water cavity is also opened on the inner side of the pickling device, a water inlet is opened on the outer side of the water cavity, an annealing device is installed on the bottom side of the pickling device, an annealing cavity is opened in the annealing device, and a heat storage plate and an annealing heater are installed in the annealing cavity.

[0007] Preferably, the rotating rod is connected to one end of the pickling device, a first motor is provided on the other end of the pickling device, a recovery roller is connected to the output end of the first motor, and the rotating rod and the recovery roller are both rotatably connected in the pickling device.

[0008] Preferably, a partition plate is installed in the pickling device, a weak acid tank is provided on one side of the partition plate, and a strong acid tank is provided on the other end, two second limiting rollers are symmetrically installed on the inner sides of the weak acid tank and the strong acid tank, wiping blocks are installed between the second limiting rollers, and stainless steel coils are connected to the wiping blocks.

[0009] Preferably, the water cavity is opened at the bottom end of the pickling device, and is located at the bottom side of the weak acid tank and the strong acid tank, and the water inlet extends to the outside of the pickling device.

[0010] Preferably, material ports are symmetrically opened on both sides of the annealing chamber, and the stainless steel coil is movably connected to the material port and the annealing chamber. Brackets and collecting rods are respectively installed on the outer sides of the material ports on both sides, and the brackets are located on the bottom side of the recovery roller. A second motor is installed at one end of the collecting rod.

[0011] Preferably, the annealing heater is installed on the bottom side of the annealing chamber, and the heat storage plate is installed on the top of the annealing chamber and is located on the bottom side of the water chamber.

[0012] The beneficial effects of the utility model are:

[0013] The utility model can enable the material to be pickled in a strong acid tank and a weak acid tank in a connected manner through the cooperation of the first limiting roller and the second limiting roller, anneal the material through the annealing heater, and the heat storage block can collect the generated heat, so that the liquid in the water cavity can be heated, and the heat is transmitted to the pickling liquid through heat conduction, so that the material can be preheated.

[0014] The utility model reduces the occurrence of incomplete removal of iron oxide scale during the pickling process, reduces the possibility of consuming a large amount of energy during annealing, improves the effect of continuous pickling of stainless steel coils by the device, improves the preheating effect of the material, and improves the activity of the pickling solution, which is helpful to remove oxides and impurities on the metal surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the cold-rolled strip continuous pickling and annealing unit proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the cold-rolled strip continuous pickling and annealing unit proposed by the utility model;

[0017] Figure 3 The utility model is a schematic structural side view of a cold-rolled strip continuous pickling and annealing unit.

[0018] In the figure: 1. pickling device; 2. annealing device; 3. rotating rod; 4. first limiting roller; 5. weak acid tank; 6. second limiting roller; 7. strong acid tank; 8. first motor; 9. bracket; 10. water inlet; 11. recovery roller; 12. collecting rod; 13. annealing heater; 14. heat storage plate; 15. water chamber; 16. annealing chamber; 17. wiping block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] Reference Figure 1-3 The cold-rolled strip continuous pickling annealing unit comprises a pickling device 1, a rotating rod 3 is installed on one side of the pickling device 1, the rotating rod 3 is connected to one end of the pickling device 1, a first motor 8 is arranged on the other end of the pickling device 1, a recovery roller 11 is connected to the output end of the first motor 8, the rotating rod 3 and the recovery roller 11 are both rotatably connected in the pickling device 1, a first limiting roller 4 is arranged on the rotating rod 3, a second limiting roller 6 is installed on one side of the first limiting roller 4, a water chamber 15 is also opened on the inner side of the pickling device 1, and the water chamber 15 has a A water inlet 10 is provided on the outer side, an annealing device 2 is installed on the bottom side of the pickling device 1, an annealing chamber 16 is provided in the annealing device 2, a heat storage plate 14 and an annealing heater 13 are installed in the annealing chamber 16, a partition plate is installed in the pickling device 1, a weak acid tank 5 is provided on one side of the partition plate, and a strong acid tank 7 is provided on the other end, two second limiting rollers 6 are symmetrically installed on the inner sides of the weak acid tank 5 and the strong acid tank 7, wiping blocks 17 are installed between the second limiting rollers 6, and stainless steel coils are connected to the wiping blocks 17.

[0022] In this embodiment, the water chamber 15 is opened at the bottom end of the pickling device 1, and it is located on the bottom side of the weak acid tank 5 and the strong acid tank 7. The water inlet 10 extends to the outside of the pickling device 1. Material ports are symmetrically opened on both sides of the annealing chamber 16. The stainless steel coil is movably connected in the material port and the annealing chamber 16. A bracket 9 and a collecting rod 12 are respectively installed on the outside of the material ports on both sides. The bracket 9 is located on the bottom side of the recovery roller 11. A second motor is installed at one end of the collecting rod 12. The annealing heater 13 is installed on the bottom side of the annealing chamber 16. The heat storage plate 14 is installed on the top of the annealing chamber 16 and is located on the bottom side of the water chamber 15.

[0023] Working principle: When the pickling device 1 is working, the first motor 8 will rotate, and the rotation will drive the cold-rolled strip to be transmitted. It will first enter the weak acid tank 5 for pickling, and then enter the strong acid tank 7 for pickling. After pickling, it will be collected on the collecting rod 12. During the pickling process, the wiping block 17 will wipe the material for better reaction. During annealing, the material will enter the annealing chamber 16, and the annealing heater 13 will anneal the material. The heat generated by the annealing heater 13 will be absorbed by the heat storage plate 14. After absorption, the heat will be transferred to the water chamber 15. After the liquid in the water chamber 15 is heated, the heat will be transferred to the pickling liquid. The pickling liquid will preheat the material during the pickling process, and the pickling reaction will be more effective.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Cold rolled strip continuous pickling annealing unit, characterized in that: include: A pickling device (1), wherein a rotating rod (3) is installed on one side of the pickling device (1), a first limiting roller (4) is arranged on the rotating rod (3), a second limiting roller (6) is installed on one side of the first limiting roller (4), a water cavity (15) is also provided on the inner side of the pickling device (1), a water inlet (10) is provided on the outer side of the water cavity (15), an annealing device (2) is installed on the bottom side of the pickling device (1), an annealing cavity (16) is provided in the annealing device (2), and a heat storage plate (14) and an annealing heater (13) are installed in the annealing cavity (16).

2. The cold-rolled strip continuous pickling and annealing unit according to claim 1, characterized in that: The rotating rod (3) is connected to one end of the pickling device (1), and a first motor (8) is provided on the other end of the pickling device (1). A recovery roller (11) is connected to the output end of the first motor (8), and the rotating rod (3) and the recovery roller (11) are both rotatably connected in the pickling device (1).

3. The cold-rolled strip continuous pickling and annealing unit according to claim 2, characterized in that: A partition plate is installed in the pickling device (1), a weak acid tank (5) is provided on one side of the partition plate, and a strong acid tank (7) is provided on the other end, two second limiting rollers (6) are symmetrically installed on the inner sides of the weak acid tank (5) and the strong acid tank (7), a wiping block (17) is installed between the second limiting rollers (6), and a stainless steel coil is connected to the wiping block (17).

4. The cold-rolled strip continuous pickling and annealing unit according to claim 3, characterized in that: The water chamber (15) is opened at the bottom end of the pickling device (1) and is located at the bottom side of the weak acid tank (5) and the strong acid tank (7), and the water inlet (10) extends to the outside of the pickling device (1).

5. The cold-rolled strip continuous pickling and annealing unit according to claim 4, characterized in that: The annealing chamber (16) is symmetrically provided with material openings on both sides, the stainless steel coil is movably connected to the material openings and the annealing chamber (16), and brackets (9) and collecting rods (12) are respectively installed on the outer sides of the material openings on both sides, the brackets (9) are located on the bottom side of the recovery roller (11), and a second motor is installed at one end of the collecting rod (12).

6. The cold-rolled strip continuous pickling and annealing unit according to claim 5, characterized in that: The annealing heater (13) is installed on the bottom side of the annealing chamber (16), and the heat storage plate (14) is installed on the top of the annealing chamber (16) and is located on the bottom side of the water chamber (15).

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