A high-efficiency pickling unit applied to strip steel

Abstract

The application relates to a high-efficiency pickling unit applied to a strip steel, which comprises a pickling box body, airflow impact roller devices are arranged at the lower end of the inside of the pickling box body, and the airflow impact roller devices are used for airflow washing on the upper and lower surfaces of the steel strip; the airflow impact roller devices comprise impact roller assemblies arranged at the bottom end of the inside of the pickling box body and airflow conveying pipes arranged at the outside of the pickling box body; the impact roller assemblies comprise concave rollers and convex rollers; the concave rollers and the convex rollers are arranged in an up-and-down distribution mode and are close to each other; the concave rollers and the convex rollers are arranged in a staggered distribution mode between the concave grooves on the concave rollers and the convex rollers; a plurality of nozzles are arranged in the concave grooves in a radial direction; the nozzles and the steel strip surface are arranged close to each other, so that the airflow sprayed by the nozzles can effectively strip off the oxide scales, thereby improving the pickling quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pickling equipment, and particularly relates to a high-efficiency pickling unit applied to a strip steel. BACKGROUND

[0002] A traditional pickling operation process is an immersion pickling method, that is, metal materials are immersed in acid liquid, and the acid liquid reacts with the oxides on the surface of the metal materials to fall off from the surface of the metal materials. During the pickling process, the reactants of the acid liquid and the oxides still form a protective layer with weaker acidity on the metal surface, and the pickling operation can be gradually completed only by the slow diffusion of the reactants, so that a large amount of time is required for the pickling process. The steel strip in the acid liquid forms a layer of bubbles on the metal surface, which hinders the contact between the acid liquid and the metal surface, thereby reducing the pickling effect.

[0003] Patent No. CN202022037076.5 discloses a steel pipe pickling tank, which comprises a pickling tank body, and a gas blowing mechanism for surging acid liquid is further arranged at the bottom of the pickling tank body along the length direction. The gas blowing mechanism at the bottom of the tank body surges the acid liquid, and the rotation of the steel pipe and the surging of the acid liquid caused by the gas blowing are combined to increase the pickling efficiency of the pickled steel pipe. The application improves the pickling quality by using airflow washing, but the airflow washing structure is fixed and cannot fully impact the metal surface, so the airflow washing effect is limited. Therefore, it is necessary for those skilled in the art to improve it. SUMMARY

[0004] The present application discloses a high-efficiency pickling unit applied to a strip steel to solve the problem of poor pickling effect of the airflow impact structure in the pickling equipment in the prior art.

[0005] The specific technical solution is as follows:

[0006] A high-efficiency pickling unit applied to a strip steel, comprising a pickling box body, a plurality of guide rollers are arranged around the inside of the pickling box body for guiding the strip steel, a horizontal convex inlet bin is arranged on one side of the top of the pickling box body, one end of the inlet bin is provided with an opening, a channel seat for outputting the strip steel is arranged at the bottom of the inlet bin, and an airflow impact roller device is arranged at the lower end of the inside of the pickling box body, which is used for airflow washing the upper and lower surfaces of the strip steel.

[0007] The air flow impact roller device comprises an impact roller assembly arranged at the bottom end inside the pickling box body and an air flow conveying pipe arranged outside the pickling box body, the number of the impact roller assembly is at least two and the impact roller assembly is arranged along the conveying direction of the steel belt, the impact roller assembly comprises a concave roller and a convex roller, the concave roller is in a structure of thin in the middle and thick at both ends, the convex roller is in a structure of thick in the middle and thin at both ends, the concave roller and the convex roller are arranged in an up-down distribution and close to each other, and the rotating directions of the concave roller and the convex roller are opposite, the steel belt is arranged between the concave roller and the convex roller, so that the cross section of the steel belt is arranged in an arc shape, and the up-down distribution directions of the concave roller and the convex roller in adjacent two impact roller assemblies are opposite; the concave roller and the convex roller are both in a hollow structure and are provided with a gas conveying channel, one end of the concave roller and the convex roller is rotatably arranged on the inner wall of one side of the pickling box body through a shaft, the other end of the concave roller and the convex roller is provided with a hollow shaft which is in communication with the gas conveying channel, the two hollow shafts horizontally penetrate the side wall of the other side of the pickling box body and are rotatably connected with and in communication with the air flow conveying pipe, and the air flow conveying pipe is connected with a high-pressure gas source; the surfaces of the concave roller and the convex roller are provided with concave grooves, and the concave grooves on the concave roller and the convex roller are arranged in a staggered distribution, a plurality of nozzles are arranged in the concave grooves in a radial direction, and the nozzles are in communication with the gas conveying channel through a gas outlet channel.

[0008] Further, one side of the air flow conveying pipe is provided with a plurality of gas conveying branch pipes, the positions of the gas conveying branch pipes correspond to the positions of the hollow shafts respectively, and the gas conveying branch pipes and the hollow shafts are rotatably connected through a rotary joint.

[0009] Further, the nozzles are provided with a water seepage prevention structure, the water seepage prevention structure comprises a sealing steel ball movably arranged in the nozzle, the diameter of the sealing steel ball is smaller than the maximum diameter of the inner cavity of the nozzle, and a plurality of limiting blocks for limiting the movement of the sealing steel ball are arranged on the inner wall of the nozzle; the bottom end of the inner cavity of the nozzle is in a conical structure with a large upper end and a small lower end, and the sealing steel ball and the bottom end of the inner cavity of the nozzle are matched to seal the gas outlet channel.

[0010] Further, the number of the concave grooves on the concave roller and the convex roller is at least two and the concave grooves are arranged in a left-right distribution.

[0011] Further, the channel seat is in a rectangular structure, soft scraping pads are arranged on the inner walls of the two sides of the channel seat, and the two soft scraping pads are arranged in close contact with the two sides of the steel belt respectively.

[0012] Further, the bottom of the pickling box body is provided with supporting legs.

[0013] The beneficial effects of the present application are reflected in:

[0014] The acid pickling tank is provided with the airflow impact roller device, compared with the traditional airflow impact structure, the concave roller is matched with the convex roller, the steel belt is bent and deformed, so that the oxide scale is peeled off, and the nozzles on the concave roller and the convex roller are matched, the nozzles are arranged close to the surface of the steel belt, so that the airflow sprayed by the nozzles can effectively peel off the oxide scale, thereby improving the pickling quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present application.

[0016] Figure 2 It is a structural schematic diagram of the impact roller assembly in the present application.

[0017] Figure 3 It is a side view of the acid pickling tank body in the present application.

[0018] Figure 4 It is Figure 3 It is an enlarged schematic view of A in the present application.

[0019] The acid pickling tank body 1, the inlet bin 11, the channel seat 12, the soft scraping pad 121, the guide roller 13, the supporting leg 14;

[0020] The airflow impact roller device 2, the airflow conveying pipe 21, the gas conveying branch pipe 211, the rotary joint 212, the concave roller 22, the gas conveying channel 221, the hollow shaft 222, the concave groove 223, the nozzle 224, the sealing steel ball 2241, the limiting block 2242, the gas outlet channel 225, the convex roller 23;

[0021] The steel belt 3. DETAILED DESCRIPTION

[0022] In order to make the technical scheme of the present application clearer and more explicit, the present application will be further described below in combination with the drawings, and any equivalent replacement and conventional inference of the technical features of the technical scheme of the present application all fall within the protection scope of the present application. The fixed connection and fixed setting mentioned in the present application are all general connection modes in the mechanical field, and welding, bolt and nut connection and screw connection are all possible.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0024] As Figure 1As shown, an efficient pickling unit applied to strip steel, including pickling box 1, the bottom of pickling box 1 is provided with four supporting legs 14, the inside of pickling box 1 is provided with guide rollers 13 for guiding the steel strip 3, the guide rollers 13 are driven to rotate by a driving motor, the upper side of one end of pickling box 1 is horizontally protruded to provide an inlet bin, one end of the inlet bin is provided with an opening, the bottom of the inlet bin is provided with a channel seat 12 for the output of the steel strip, the channel seat 12 is in a rectangular structure, the inner wall of the channel seat 12 is provided with two soft scraping pads 121 on both sides, the two soft scraping pads 121 are respectively arranged to be in contact with the surfaces of both sides of the steel strip; the lower end of the inside of pickling box 1 is provided with an airflow impact roller device 2, the airflow impact roller device 2 is used to airflow wash the upper and lower surfaces of the steel strip.

[0025] As shown, Figures 2-3 the airflow impact roller device 2 includes impact roller assemblies arranged at the bottom end of the inside of pickling box 1 and airflow conveying pipes 21 arranged on the outside of pickling box 1, the number of impact roller assemblies is at least two and they are arranged in the conveying direction of the steel strip, the impact roller assemblies include a concave roller 22 and a convex roller 23, the concave roller 22 is in a structure of thin in the middle and thick at both ends, the convex roller 23 is in a structure of thick in the middle and thin at both ends, the concave roller 22 and the convex roller 23 are arranged in an up-down distribution and close to each other, and the rotating directions of the concave roller 22 and the convex roller 23 are opposite, the steel strip is arranged to pass between the concave roller 22 and the convex roller 23, so as to convey the steel strip 3, the cross section of the steel strip 3 is arranged to be curved in an arc shape, the up-down distribution directions of the concave roller 22 and the convex roller 23 in the adjacent two impact roller assemblies are opposite, so that when the steel strip is located in different impact roller assemblies, the bending direction also changes; the concave roller 22 and the convex roller 23 are both in a hollow structure and are provided with gas conveying channels 221, one end of the concave roller 22 and the convex roller 23 is rotatably arranged on the inner wall of one side of pickling box 1 through a shaft, the other end of the concave roller 22 and the convex roller 23 is both provided with a hollow shaft 222 which is in communication with the gas conveying channel 221, the two hollow shafts 222 horizontally penetrate the other side wall of pickling box 1, one side of the airflow conveying pipe 21 is provided with a plurality of gas branch pipes 211, the positions of the gas branch pipes 211 respectively correspond to the positions of the hollow shafts 222, and the gas branch pipes 211 and the hollow shafts 222 are rotatably connected through rotary joints 212, the airflow conveying pipe 21 is connected with a high-pressure gas source for providing airflow impact; the surfaces of the concave roller 22 and the convex roller 23 are both provided with at least two concave grooves 223, and the concave grooves 223 on the concave roller 22 and the convex roller 23 are distributed in a staggered manner, a plurality of nozzles 224 are arranged in the concave grooves 223 in a radial direction, one end of the nozzle 224 is not higher than the surface of the concave roller 22 and the convex roller 23 to prevent the nozzle 224 from contacting the steel strip, the inside of the nozzle 224 is in communication with the gas conveying channel 221 through a gas outlet channel 225, so that the nozzle 224 can be used to spray airflow on the surface of the steel strip to remove the surface iron oxide impurities.

[0026] AsFigure 4 As shown, in order to prevent the pickling solution from entering the inside of the concave roller 22 and the convex roller 23, a water leakage prevention structure is arranged inside the nozzle 224, which comprises a sealing steel ball 2241 movably arranged inside the nozzle 224, the diameter of the sealing steel ball 2241 is smaller than the maximum diameter of the inner cavity of the nozzle 224, and a plurality of limiting blocks 2242 for limiting the movement of the sealing steel ball 2241 are arranged on the upper end of the inner wall of the nozzle 224; the bottom end of the inner cavity of the nozzle 224 is a taper structure with a large upper end and a small lower end, and the sealing of the air outlet passage 225 is realized by the cooperation of the sealing steel ball 2241 and the bottom end of the inner cavity of the nozzle 224.

[0027] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high-efficiency pickling unit applied to a strip steel, comprising a pickling box body (1), a plurality of guide rollers (13) are arranged around the inside of the pickling box body (1) for guiding a steel strip (3), a horizontal protrusion is arranged on the upper side of one end of the pickling box body (1), and an inlet and outlet bin (11) is arranged on the horizontal protrusion, one end of the inlet and outlet bin (11) is provided with an opening, and a channel seat (12) for outputting the steel strip is arranged on the bottom of the inlet and outlet bin (11), characterized in that, An airflow impact roller device (2) is provided at the lower end of the pickling box (1), and the airflow impact roller device (2) is used to perform airflow flushing on the upper and lower surfaces of the steel strip; The air flow impact roller device (2) comprises an impact roller assembly arranged at the bottom end of the pickling box (1) and an air flow conveying pipe (21) arranged outside the pickling box (1), the number of the impact roller assemblies is at least two and they are arranged in an array along the conveying direction of the steel strip, the impact roller assembly comprises a concave roller (22) and a convex roller (23), the concave roller (22) is thin in the middle and thick at both ends, the convex roller (23) is thick in the middle and thin at both ends, the concave roller (22) and the convex roller (23) are distributed up and down and are arranged close to each other, and the rotation directions of the concave roller (22) and the convex roller (23) are opposite, a steel strip is passed between the concave roller (22) and the convex roller (23), so that the cross section of the steel strip is curved in an arc shape, and the up and down distribution directions of the concave roller (22) and the convex roller (23) in two adjacent impact roller assemblies are opposite; the interiors of the concave roller (22) and the convex roller (23) are both hollow. The structure is provided with an air delivery channel (221), one end of the concave roller (22) and the convex roller (23) are rotatably arranged on the inner wall of one side of the pickling box (1), and the other end of the concave roller (22) and the convex roller (23) are both provided with a hollow shaft (222) connected to the air delivery channel (221), and the two hollow shafts (222) horizontally penetrate the other side wall of the pickling box (1) and are rotatably connected to the air delivery pipe (21). The air flow conveying pipe (21) is connected to a high-pressure air source; the surfaces of the concave roller (22) and the convex roller (23) are both provided with concave grooves (223), and the concave grooves (223) on the concave roller (22) and the convex roller (23) are staggered; a plurality of nozzles (224) are radially distributed in the concave grooves (223), and the interior of the nozzles (224) is communicated with the air delivery channel (221) through an air outlet channel (225).

2. A high efficiency pickling line for strip steel as claimed in claim 1, characterized in that A plurality of gas delivery branches (211) are provided on one side of the air delivery pipe (21), the position of each gas delivery branch (211) corresponds to the position of a hollow shaft (222), and the gas delivery branch (211) and the hollow shaft (222) are rotatably connected via a rotary joint (212).

3. A high efficiency pickling line for strip steel as claimed in claim 1, characterized in that, The nozzle (224) is provided with an anti-seepage structure inside, which includes a sealing steel ball (2241) movably arranged inside the nozzle (224). The diameter of the sealing steel ball (2241) is smaller than the maximum diameter of the inner cavity of the nozzle (224). The upper end of the inner wall of the nozzle (224) is provided with a plurality of limiting blocks (2242) for limiting the movement of the sealing steel ball (2241). The bottom end of the inner cavity of the nozzle (224) is a conical structure with a larger upper portion and a smaller lower portion. The sealing of the air outlet channel (225) is achieved by the cooperation between the sealing steel ball (2241) and the bottom end of the inner cavity of the nozzle (224).

4. A high efficiency pickling line for strip steel as claimed in claim 1, characterized in that, The number of the concave grooves (223) on the concave roller (22) and the convex roller (23) is at least two and they are distributed left and right.

5. A high efficiency pickling line for strip steel as claimed in claim 1, characterized in that, The channel seat (12) is in a rectangular structure, and soft scraping pads (121) are arranged on both sides of the inner wall of the channel seat (12), and the two soft scraping pads (121) are respectively arranged in close contact with the two side surfaces of the steel belt.

6. A high efficiency pickling line for strip steel as claimed in claim 1, characterized in that, The acid washing box body (1) is provided with supporting legs (14) around the bottom.

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