A pickling unit surface oxide layer pretreatment device and system

Abstract

The present application relates to strip steel pickling technical field, specifically to a kind of pickling unit surface oxide layer pretreatment device and system.Closed box body has the entrance and exit for strip steel to pass through;Upper brush roller and lower brush roller are set in closed box body and are respectively located at the upper and lower sides of strip steel, for the upper and lower surfaces of strip steel are brushed, to make the scale dust and loose layer of strip steel surface stripping;Sweeping beam is set at the entrance and exit of closed box body, and is respectively located at the upper and lower sides of strip steel, for the surface of strip steel is blown, to make the scale of strip steel surface move to the both sides of strip steel width direction;Dust suction port is set in closed box body, for connecting dust removal device to suck the suspended dust in closed box body;Collecting funnel is set in the lower part of closed box body, for receiving the scale separated from the both sides of strip steel.Reduce the scale to continue to fall off and spread in the subsequent operation process of strip steel, and reduce the amount of loose scale with strip steel into subsequent pickling process.

Description

Technical Field

[0001] This invention relates to the field of steel strip pickling technology, and more specifically, to a surface oxide layer pretreatment device and system for a pickling unit. Background Technology

[0002] Pickling is a crucial process in the production of hot-rolled strip steel, used to remove iron oxide scale from its surface. In continuous pickling units, hot-rolled strip steel typically undergoes welding, tension leveling, and pickling processes sequentially. During tension leveling, the strip steel is subjected to repeated bending and stretching, causing the iron oxide scale originally attached to the strip steel surface to crack and loosen, and some of the scale will even detach from the strip steel surface, forming iron oxide dust.

[0003] However, even after straightening, a certain amount of iron oxide scale and loose layer still adheres to the upper and lower surfaces of the strip. As the strip continues to run, this iron oxide scale and loose layer easily detach during subsequent conveying, forming dust that spreads around the unit. Simultaneously, some of the loose iron oxide scale that doesn't detach will enter the subsequent pickling process with the strip, increasing the amount of iron oxide scale that needs to be treated during pickling. Therefore, how to effectively treat the iron oxide scale and loose layer still adhering to the surface of the strip after straightening is a technical problem that needs to be solved in the existing strip pickling production process. Summary of the Invention

[0004] The problem solved by this invention is to effectively treat the iron oxide scale dust and loose layer still attached to the surface of the strip after tension straightening.

[0005] The technical solution of the present invention is as follows: In a first aspect, the present invention provides a pretreatment device for the surface oxide layer of an acid pickling unit, comprising: A sealed enclosure with an inlet and an outlet for the steel strip to pass through; The upper and lower brush rollers are set inside the sealed box and located on the upper and lower sides of the strip steel, respectively, to brush the upper and lower surfaces of the strip steel so as to peel off the iron oxide scale dust and loose layer on the surface of the strip steel. The blowing beams are located at the entrance and exit of the sealed box, and on the upper and lower sides of the strip steel, respectively, for blowing air onto the surface of the strip steel to make the iron oxide scale on the surface of the strip steel move to both sides in the width direction of the strip steel. A dust suction port is provided in the sealed box and is used to connect a dust removal device to suck up suspended dust inside the sealed box. And a collection funnel, located at the bottom of the sealed box, for receiving iron oxide scale that detaches from both sides of the strip steel.

[0006] Preferably, the blowing beams respectively include an upper blowing beam located above the strip and a lower blowing beam located below the strip. The blowing direction of the upper blowing beam and the lower blowing beam is configured to cause the iron oxide scale on the surface of the strip to move from the middle of the strip towards both sides in the width direction. The airflows sprayed by the upper blowing beam and the lower blowing beam at the inlet and the outlet respectively form an air curtain at the inlet and the outlet to prevent dust from overflowing.

[0007] Preferably, both the upper and lower purging beams are V-shaped purging beams, and each V-shaped purging beam includes two symmetrically arranged air-blowing branches along the width direction of the strip. The two air-blowing branches extend obliquely from the middle of the strip to both sides in the width direction.

[0008] Preferably, each of the air-blowing branch pipes is provided with an air-blowing hole, and the air-blowing direction of the air-blowing hole is from the middle of the strip outward and inclined towards the surface of the strip, so as to form a V-shaped airflow sweeping from the middle to both sides on the surface of the strip.

[0009] Preferably, the dust suction port is disposed on the side wall of the sealed box and located in the area between the upper brush roller and the lower brush roller.

[0010] Preferably, the lower part of the sealed box tapers downward to form the collecting funnel, and the bottom of the collecting funnel is provided with a discharge port and a valve for opening and closing the discharge port.

[0011] Preferably, the upper brush roller and the lower brush roller are driven to rotate by a motor, and the bristles of the upper brush roller and the lower brush roller are in contact with the upper surface and the lower surface of the strip steel, respectively.

[0012] Preferably, the sealed enclosure includes an upper enclosure and a lower enclosure that are joined together vertically, and the upper enclosure and the lower enclosure are detachably connected.

[0013] Preferably, a pressure adjustment assembly is provided between the upper brush roller and the lower brush roller. The pressure adjustment assembly includes two nuts connected to the upper brush roller and the lower brush roller respectively, and studs connected to the nuts.

[0014] In a second aspect, the present invention provides a system comprising: The equipment includes a straightening machine, a welding machine, a tension leveler, and a pickling process section, all of which are located on the running path of the strip steel. And at least two pretreatment devices for surface oxide layer of pickling unit as described in any one of the above, wherein one of the pretreatment devices is located between the straightening machine and the welding machine, for removing iron oxide scale from the surface of strip steel or the surface of strip steel treated by the straightening machine; the other of the pretreatment devices is located between the tension leveling machine and the pickling process section, for removing iron oxide scale from the surface of strip steel treated by the tension leveling machine.

[0015] The beneficial effects of the surface oxide layer pretreatment device for the pickling unit of the present invention are as follows: By setting upper and lower brush rollers respectively on the upper and lower sides of the strip steel in a sealed box, the iron oxide scale and loose layer attached to the upper and lower surfaces of the strip steel can be actively peeled off by the brushing action during the process of the strip steel passing through the sealed box; at the same time, by setting the blowing beams at the entrance and exit of the sealed box and respectively on the upper and lower sides of the strip steel, the surface of the strip steel is blown, so that the peeled or loose iron oxide scale moves to both sides along the width direction of the strip steel and detaches from the strip steel, thereby reducing the iron oxide scale. The iron oxide scale continues to be conveyed with the strip steel. The suspended dust generated during the separation process can be extracted through the dust suction port, while the heavier iron oxide scale is collected by the collection funnel set at the bottom of the sealed box. Thus, the brushing and peeling of iron oxide scale, directional removal, and collection of dust and particles are all completed in the sealed box, reducing the continued shedding and diffusion of iron oxide scale during the subsequent operation of the strip steel, and reducing the amount of loose iron oxide scale entering the subsequent pickling process with the strip steel. This effectively solves the problem that the floating dust and loose layer of iron oxide scale still attached to the surface of the strip steel after tension leveling are difficult to effectively deal with. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the system of the present invention; Figure 2 This is a front view schematic diagram of the surface oxide layer pretreatment device of the pickling unit of the present invention; Figure 3 for Figure 2 A cross-sectional schematic diagram of the structure shown; Figure 4 for Figure 3 The structure shown is a cross-sectional view along AA. Figure 5 for Figure 2 The diagram shows a cross-sectional view of the structure along BB.

[0017] Explanation of reference numerals in the attached figures: 1. Sealed housing; 11. Upper housing; 12. Lower housing; 13. Sealing plate; 14. Extrusion pressure adjustment assembly; 141. Stud; 2. Upper brush roller; 3. Lower brush roller; 4. Motor; 5. Dust suction port; 6. Collection funnel; 7. Discharge port; 8. Brush roller bearing seat; 9a. Inlet V-shaped upper blowing beam; 9b. Inlet V-shaped lower blowing beam; 9c. Outlet V-shaped upper blowing beam; 9d. Outlet V-shaped lower blowing beam; 10. Strip steel; 101. Uncoiling machine; 102. Straightening machine; 103. Welding machine; 104. Dust removal device; 105. Chimney; 106. Tension straightening machine; 107. Pickling process section; 108. Inlet looper. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] Example 1 This embodiment provides a surface oxide layer pretreatment device for a pickling unit. This pretreatment device is used to remove the iron oxide scale, dust, and loose layer adhering to the surface of the strip steel 10. For example... Figures 1 to 5 As shown, the pretreatment device includes a sealed box 1, an upper brush roller 2, a lower brush roller 3, a blowing beam, a dust suction port 5, and a collection funnel 6.

[0022] Specifically, the sealed chamber 1 has an inlet and an outlet for the strip steel 10 to pass through. The strip steel 10 enters the sealed chamber 1 through the inlet and exits through the outlet. Thus, the sealed chamber 1 forms a relatively independent processing space along the running path of the strip steel 10, allowing the brushing and blowing processes of the strip steel 10 to be concentrated within this processing space. It also provides spatial constraint for the iron oxide scale particles and suspended dust generated during the cleaning process, thereby reducing the diffusion of iron oxide scale to the outside of the sealed chamber 1 during the cleaning process.

[0023] The upper brush roller 2 and the lower brush roller 3 are disposed inside the sealed housing 1 and are located on the upper and lower sides of the strip 10, respectively. The upper brush roller 2 corresponds to the upper surface of the strip 10, and the lower brush roller 3 corresponds to the lower surface of the strip 10. When the strip 10 passes through the sealed housing 1, the upper brush roller 2 and the lower brush roller 3 brush the upper and lower surfaces of the strip 10, respectively, causing the iron oxide scale and loose layer adhering to the upper and lower surfaces of the strip 10 to be separated from the surface of the strip 10 by the brushing action. By brushing the upper and lower surfaces of the strip 10 separately, the iron oxide scale on both sides of the strip 10 can be actively removed, avoiding the need to treat only the iron oxide scale that has already detached itself.

[0024] The blowing beams are located at the inlet and outlet of the sealed box 1, respectively, on the upper and lower sides of the strip 10, and are used to blow air onto the surface of the strip 10. The airflow generated by the blowing beams acts on the upper and lower surfaces of the strip 10, causing the iron oxide scale on the surface of the strip 10 to be subjected to the airflow along the width direction of the strip 10, and to move from the middle of the strip 10 towards both sides in the width direction. Through the above blowing process, on the one hand, the iron oxide scale that has been peeled off after being brushed by the upper brush roller 2 and the lower brush roller 3 but still remains on the surface of the strip 10 can be further removed from the strip 10; on the other hand, the loose iron oxide scale can be transferred to both sides of the strip 10, thereby reducing the situation where the iron oxide scale continues to move backward with the strip 10.

[0025] The suction port 5 is located in the sealed chamber 1 and is used to connect to the dust removal device 104. During the brushing of the surface of the strip steel 10 by the upper brush roller 2 and the lower brush roller 3, and the blowing beam blowing the surface of the strip steel 10, some iron oxide scale will form fine dust suspended inside the sealed chamber 1. At this time, the dust removal device 104 connected to the suction port 5 can be used to suck up the inside of the sealed chamber 1, so that the suspended dust is discharged from the sealed chamber 1 through the suction port 5. Thus, the suction port 5 and the sealed chamber 1 work together to ensure that the suspended dust generated during the removal of iron oxide scale can be concentrated and sucked up in its processing space, reducing the continuous accumulation of suspended dust in the sealed chamber 1 or being carried out with the strip steel 10.

[0026] A collecting funnel 6 is located at the bottom of the sealed box 1 to collect the iron oxide scale that detaches from both sides of the strip 10. After the blowing beam moves the iron oxide scale from the middle of the strip 10 towards both sides in the width direction, the detached iron oxide scale can move towards the bottom of the sealed box 1 under its own gravity and enter the collecting funnel 6. Thus, larger iron oxide scale particles can be treated differently from suspended dust; that is, suspended dust is sucked in through the suction port 5, while the falling iron oxide scale is collected by the collecting funnel 6, thereby preventing the detached iron oxide scale from re-scattering into the sealed box 1 or continuing to move with the strip 10.

[0027] In actual operation, the strip steel 10 enters through the inlet of the sealed box 1 and moves toward the outlet; the upper brush roller 2 and the lower brush roller 3 act on the upper and lower surfaces of the strip steel 10 respectively, causing the iron oxide scale and loose layer attached to the surface of the strip steel 10 to be peeled off by the brushing action; the blowing beam blows air onto the surface of the strip steel 10, causing the iron oxide scale on the surface of the strip steel 10 to move from the middle of the strip steel 10 to both sides in the width direction and further detach from the strip steel 10; the suspended dust formed therein is sucked in through the dust suction port 5, and the iron oxide scale that can move downwards falls into the collection funnel 6. Therefore, the upper brush roller 2 and the lower brush roller 3 first actively peel off the iron oxide scale and loose layer still attached to the surface of the strip steel 10. The blowing beam further causes the iron oxide scale to leave the strip steel 10 along the width direction. The dust suction port 5 and the collection funnel 6 respectively treat the suspended dust and detached iron oxide scale formed during the cleaning process. The peeling, detachment and collection process of iron oxide scale is completed in the sealed box 1, which can effectively remove the iron oxide scale and loose layer still attached to the surface of the strip steel 10 and reduce the situation where the iron oxide scale continues to fall off during the subsequent operation of the strip steel 10.

[0028] In the above embodiment, the upper brush roller 2 and the lower brush roller 3 are installed in the sealed housing 1 through the brush roller bearing seat 8.

[0029] In a preferred embodiment, the purge beams at the inlet and outlet of the sealed box 1 include an upper purge beam located above the strip 10 and a lower purge beam located below the strip 10, respectively. The upper purge beam corresponds to the upper surface of the strip 10, and the lower purge beam corresponds to the lower surface of the strip 10, thereby enabling the upper and lower surfaces of the strip 10 to be purged respectively. The blowing direction of both the upper and lower purge beams is configured such that the airflow acting on the surface of the strip 10 flows from the middle of the strip 10 towards both sides in the width direction, causing the iron oxide scale that has been peeled off by brushing or is in a loose state to be gradually moved towards the edge of the strip 10 and detached from the surface of the strip 10 by the airflow towards both sides of the strip 10. Compared to moving the iron oxide scale along the running direction of the strip 10, moving the iron oxide scale to both sides in the width direction of the strip 10 can shorten the path of the iron oxide scale discharged from the surface of the strip 10 and allow the iron oxide scale that has detached from the strip 10 to enter the collection funnel 6 located at the bottom of the sealed box 1, thereby reducing the situation where the detached iron oxide scale continues to run backward with the strip 10.

[0030] At the same time, such as Figure 3 As shown, the sealed chamber 1 has upper and lower purge beams located on the upper and lower sides of the strip 10, respectively, at both the inlet and outlet. The airflow generated by the upper and lower purge beams acts on the area between the strip 10 and the inlet or outlet of the sealed chamber 1, forming an air curtain at the inlet and outlet of the sealed chamber 1. Since the strip 10 needs to continuously pass through the sealed chamber 1, the inlet and outlet of the sealed chamber 1 cannot be completely closed. The aforementioned air curtain can form a non-contact barrier for the strip 10 to pass through the required open area, thereby preventing suspended dust inside the sealed chamber 1 from diffusing outward through the inlet and outlet. Therefore, the airflow generated by the upper and lower blowing beams can not only directionally blow away the iron oxide scale on the surface of the strip steel 10, but also form an air curtain at the inlet and outlet of the sealed box 1. This allows the same blowing structure to participate in the removal of iron oxide scale and the restriction of dust overflow at the same time. In conjunction with the suction action of the sealed box 1 and the dust suction port 5, the dust generated during the brushing and blowing process can be confined in the sealed box 1 for centralized treatment.

[0031] Furthermore, such as Figure 3 and Figure 4As shown, both the upper and lower purging beams can be V-shaped. Each V-shaped purging beam includes two symmetrically arranged air-blowing branches along the width direction of the strip 10. These two branches extend obliquely from the middle of the strip 10 towards both sides of the width direction, forming a V-shaped structure with the middle of the strip 10 as the starting area and extending outwards to both sides. With this arrangement, the two air-blowing branches can respectively correspond to the area from the middle to the edges of the strip 10 in the width direction, allowing the purging action to spread from the middle of the strip 10 to both sides. The two air-blowing branches cooperate with each other, causing the iron oxide scale on the surface of the strip 10 to move towards the side of the strip 10 closest to them, preventing the iron oxide scale in one area of ​​the strip 10 from being transported across the entire width of the strip to the other side, thus facilitating the rapid removal of the iron oxide scale from the surface of the strip 10.

[0032] Furthermore, each blowing branch pipe is equipped with a blowing hole, the blowing direction of which is from the middle of the strip 10 outwards and inclined towards the surface of the strip 10. After the compressed gas is ejected from the blowing hole, since the blowing direction simultaneously has directional components towards the surface of the strip 10 and towards the outer side in the width direction of the strip 10, the ejected airflow can act on the iron oxide scale on the surface of the strip 10 and push the iron oxide scale from the middle of the strip 10 towards the corresponding side. When the two symmetrically arranged blowing branches work together, a V-shaped airflow sweeping from the middle to both sides in the width direction is formed on the surface of the strip 10, causing the iron oxide scale located at different width positions of the strip 10 to move towards the adjacent side and eventually detach from the strip 10.

[0033] Therefore, the V-shaped blowing beam first determines the overall distribution range of the airflow through two blowing branch pipes that extend symmetrically and obliquely along the width of the strip 10. Then, the blowing holes on each blowing branch pipe limit the specific direction of the airflow acting on the surface of the strip 10, so that the airflow can act on the iron oxide scale and also give the iron oxide scale a tendency to move from the middle of the strip 10 to both sides. This further blows away the iron oxide scale that has been peeled off or loosened after being brushed by the upper brush roller 2 and the lower brush roller 3 from the surface of the strip 10. At the same time, the airflow formed by the upper and lower V-shaped blowing beams set at the inlet and outlet of the sealed box 1 can also block the airflow in the open areas at the inlet and outlet, thus taking into account both the directional removal of iron oxide scale and the control of dust overflow from the sealed box 1.

[0034] Furthermore, such as Figure 2 and Figure 3As shown, the dust suction port 5 is located on the side wall of the sealed housing 1, in the area between the upper brush roller 2 and the lower brush roller 3. The upper brush roller 2 and the lower brush roller 3 act on the upper and lower surfaces of the strip steel 10, respectively. When brushing away the iron oxide scale and loose layer on the surface of the strip steel 10, the fine iron oxide scale that peels off easily forms suspended dust near the upper brush roller 2 and the lower brush roller 3. By placing the dust suction port 5 in the area between the upper brush roller 2 and the lower brush roller 3, the dust suction port 5 is close to the area where dust is generated during the brushing process. This allows the dust removal device 104 connected to the dust suction port 5 to promptly suck up the suspended dust generated during brushing, shortening the path of the suspended dust to other areas within the sealed housing 1 before being sucked up. Therefore, after the upper brush roller 2 and the lower brush roller 3 actively peel off the iron oxide scale, the resulting fine suspended dust can be promptly drawn away by the dust suction port 5 in the area near where it is generated. This, in conjunction with the spatial constraint effect of the sealed box 1, reduces the accumulation of suspended dust in the sealed box 1 and its outward diffusion through the inlet or outlet.

[0035] In the above embodiments, such as Figure 3 and Figure 4 As shown, the V-shaped purge beam includes an inlet V-shaped upper purge beam 9a, an inlet V-shaped lower purge beam 9b, an outlet V-shaped upper purge beam 9c, and an outlet V-shaped lower purge beam 9d. A sealing plate 13 is provided between the V-shaped purge beam and the sealed enclosure 11 to reduce the overall space of the sealed enclosure 11.

[0036] In a preferred embodiment, the lower part of the sealed box 1 tapers downward to form a collection funnel 6. The cross-section of the collection funnel 6 gradually decreases in the downward direction, allowing the iron oxide scale that detaches from the surface of the strip 10 and moves downward to concentrate at the bottom of the collection funnel 6 under the action of gravity. For the iron oxide scale that detaches from the strip 10 after being brushed by the upper brush roller 2 and the lower brush roller 3 and blown by the blowing beam, the fine dust that can remain in a suspended state is sucked in through the dust suction port 5, while the larger and heavier iron oxide scale fragments fall into the collection funnel 6 under the action of gravity. Thus, suction and gravity collection can be performed separately according to the different movement states of the detached iron oxide scale, avoiding the need for all iron oxide scale to be processed by the dust removal device 104.

[0037] A discharge port 7 is provided at the bottom of the collecting funnel 6, and a valve for opening and closing the discharge port 7 is provided at the discharge port 7. During normal operation of the pretreatment device, the valve can be closed, allowing the iron oxide scale debris falling into the collecting funnel 6 to be collected and stored in the collecting funnel 6. When a certain amount of iron oxide scale debris accumulates in the collecting funnel 6, the valve can be opened, allowing the iron oxide scale debris to be discharged through the discharge port 7 under gravity. After unloading is completed, the valve is closed again, and the collecting funnel 6 can continue to collect iron oxide scale. Through the above structure, the collecting funnel 6 can not only receive the iron oxide scale detached from the surface of the strip steel 10, but also achieve centralized discharge after collection, reducing the impact of long-term accumulation of iron oxide scale inside the sealed box 1 on the continuous operation of the device.

[0038] As a preferred embodiment, such as Figure 5 As shown, the upper brush roller 2 and the lower brush roller 3 are driven to rotate by two motors 4 respectively. The bristles of the upper brush roller 2 are in contact with the upper surface of the strip 10, and the bristles of the lower brush roller 3 are in contact with the lower surface of the strip 10. The rotational power output by the motor 4 is transmitted to the corresponding upper brush roller 2 or lower brush roller 3, so that the upper brush roller 2 and lower brush roller 3 rotate while maintaining contact with the surface of the strip 10. Since the strip 10 itself runs continuously along the direction from the inlet to the outlet of the sealed box 1, the rotating brush rollers form a relative motion with the surface of the strip 10, so that the bristles can continuously act on the iron oxide scale dust and loose layer on the surface of the strip 10, thereby producing a mechanical brushing effect on the iron oxide scale, and separating the iron oxide scale dust and loose layer still attached to the surface of the strip 10 from the surface of the strip 10.

[0039] The upper brush roller 2 and the lower brush roller 3 are driven by motor 4, giving both rollers an active power source for rotation, rather than relying on the movement of the strip 10 to passively rotate them. Thus, the upper brush roller 2 and the lower brush roller 3 can actively brush the upper and lower surfaces of the strip 10, mechanically peeling off the iron oxide scale that has become loose after straightening but has not yet detached on its own. This provides a foundation for the subsequent blowing beam to remove the iron oxide scale from the surface of the strip 10.

[0040] As a preferred embodiment, such as Figure 1 and Figure 2As shown, the sealed enclosure 1 includes an upper enclosure 11 and a lower enclosure 12 connected vertically, and the upper enclosure 11 and the lower enclosure 12 are detachably connected. Under normal operating conditions, the upper enclosure 11 and the lower enclosure 12 are connected to each other and form a processing space for the strip steel 10 to pass through and for brushing, blowing and dust collection, so as to spatially constrain the particles and suspended dust generated during the removal of iron oxide scale; when it is necessary to inspect, replace or perform other maintenance operations on the upper brush roller 2 and the lower brush roller 3 set inside the sealed enclosure 1, the connection between the upper enclosure 11 and the lower enclosure 12 can be disconnected, so that the sealed enclosure 1 changes from the closed state during normal operation to the maintenance state that exposes the internal structure.

[0041] By setting the sealed box 1 as a split structure that can be detached from the top and bottom, the sealed box 1 can form a relatively closed dust handling space during normal operation, while the upper box 11 can be removed to expand the operating space for the brush rollers during internal maintenance. This takes into account both the requirements of the sealed box for the dust removal process and the maintenance needs of internal components such as the upper brush roller 2 and the lower brush roller 3.

[0042] As a preferred embodiment, such as Figure 2 and Figure 5 As shown, a pressure adjustment component 14 is provided between the upper brush roller 2 and the lower brush roller 3. The pressure adjustment component 14 is used to adjust the degree of action of the upper brush roller 2 and the lower brush roller 3 on the upper and lower surfaces of the brush strip steel 10.

[0043] Specifically, the pressure adjustment assembly 14 includes two nuts and studs 141 connected to the two nuts. The two nuts are respectively connected to the brush roller bearing seats 8 of the upper brush roller 2 and the lower brush roller 3. By adjusting the threaded engagement position between the studs 141 and the two nuts, the relative position between the two brush roller bearing seats 8 is changed, thereby adjusting the distance between the upper brush roller 2 and the lower brush roller 3. Thus, the pressure exerted by the upper brush roller 2 and the lower brush roller 3 on the upper and lower surfaces of the strip steel 10 can be adjusted according to the thickness of the strip steel 10 and the requirements of the brushing action, so that the bristles of the two brush rollers can maintain proper contact with the upper and lower surfaces of the strip steel 10, thereby ensuring the brushing action on the iron oxide scale, dust and loose layer on the surface of the strip steel 10.

[0044] Example 2 This embodiment provides a system, such as Figure 1 As shown, the system includes a straightening machine 102, a welding machine 103, a tension straightening machine 106, a pickling process section, and at least two surface oxide layer pretreatment devices for the pickling units, with each device located on the running path of the strip steel.

[0045] The straightener 102 is mainly used to level the head and tail of the strip steel to improve the straightness of the head and tail areas, facilitating subsequent strip steel conveying and welding. During the straightening process, after the head and tail areas of the strip steel are straightened, some of the iron oxide scale on the surface may crack or form iron oxide dust adhering to the surface of the strip steel. Therefore, a pretreatment device is set between the straightener 102 and the welding machine 103, so that the strip steel 10 or the strip steel after being processed by the straightener 102 passes through the pretreatment device before entering the welding machine 103. Through brushing, blowing and suction, the iron oxide dust adhering to the surface of the strip steel is removed, reducing the possibility of the dust being shaken off and spread in the unit inlet area such as the welding machine 103 and the inlet looper as the strip steel continues to run, thereby improving the working environment in the unit inlet area.

[0046] The tension leveler 106 and the straightener 102 serve different functions. The tension leveler 106 is mainly used to stretch and repeatedly bend continuously running strip steel, causing the iron oxide scale on the strip steel surface to crack and loosen under the stretching and bending action, thus achieving descaling. After being processed by the tension leveler 106, the strip steel surface is prone to forming a large amount of loose iron oxide scale dust and larger iron oxide scale fragments that can be detached from the strip steel surface. Therefore, another pretreatment device is set up between the tension leveler 106 and the pickling process section, so that the strip steel after being descaled by the tension leveler 106 is pretreated again before entering the pickling process section to remove the iron oxide scale dust and loose iron oxide scale from the strip steel surface, and to collect the larger iron oxide scale fragments that have detached. This reduces the amount of iron oxide scale that enters the pickling process section with the strip steel, reduces the processing load of the subsequent pickling process section, and helps to improve pickling efficiency.

[0047] Therefore, the two pretreatment devices correspond to different iron oxide scale generation points. The pretreatment device located between the straightener 102 and the welding machine 103 primarily removes iron oxide scale dust from the strip surface or that adheres to the strip surface after straightening, reducing dust entry and contamination of the downstream unit inlet area. The pretreatment device located between the tension leveler 106 and the pickling process section primarily removes floating iron oxide scale dust and loose debris generated after tension leveling and descaling, reducing the amount of iron oxide scale entering the pickling process section. By performing pretreatment at different process points, iron oxide scale can be promptly removed after its generation or further loosening.

[0048] Furthermore, the system also includes an inlet looper, which is located between the welding machine 103 and the tension leveler 106. The inlet looper is used to temporarily store a certain length of strip steel and to buffer the strip steel conveying between upstream and downstream equipment by changing the length of the strip steel's running path within the inlet looper. When upstream operations such as coil changing or strip steel head and tail welding cause speed changes or temporary cessation of conveying, the strip steel stored in the inlet looper can be used to maintain continuous operation of the downstream equipment; when upstream normal conveying resumes, the amount of strip steel stored in the inlet looper is restored.

[0049] In some embodiments, the system inlet has two strip feeding channels, each equipped with an uncoiler and a straightener 102. The uncoiler unwinds the corresponding strip coil and conveys it backward, while the straightener 102 straightens the ends of the uncoiled strip. The two strip feeding channels can alternately supply strip to the welding machine 103, allowing the welding machine 103 to connect the tail of the previous strip coil to the head of the next, thus meeting the needs of subsequent continuous production. When both strip feeding channels are equipped with straighteners 102, the pretreatment device can be installed between the corresponding straightener 102 and the welding machine 103, depending on the actual layout of the production line, to promptly remove iron oxide dust adhering to the surface of the strip, or after the strip has been straightened at both ends.

[0050] Furthermore, the system also includes a dust removal device, with the suction ports 5 of at least two pretreatment devices connected to the dust removal device via dust removal pipes. Suspended dust generated during the brushing and blowing of the steel strip surface by each pretreatment device can be transported to the dust removal device for centralized treatment via the corresponding suction ports 5 and dust removal pipes under the suction effect of the dust removal device. The exhaust end of the dust removal device is connected to a chimney, allowing the treated gas to be discharged through the chimney.

[0051] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A pretreatment device for the surface oxide layer of an acid pickling unit, characterized in that, include: A sealed enclosure (1) has an inlet and an outlet through which the strip steel (10) passes; The upper brush roller (2) and the lower brush roller (3) are set inside the sealed box (1) and located on the upper and lower sides of the strip (10) respectively, for brushing the upper and lower surfaces of the strip (10) so that the iron oxide scale dust and loose layer on the surface of the strip (10) are peeled off. The blowing beam is set at the entrance and exit of the sealed box (1) and is located on the upper and lower sides of the strip (10) respectively. It is used to blow air onto the surface of the strip (10) so that the iron oxide scale on the surface of the strip (10) moves to both sides of the width direction of the strip (10). A dust suction port (5) is provided in the sealed box (1) for connecting a dust removal device (104) to suck up suspended dust in the sealed box (1); And a collection funnel (6) is provided at the bottom of the sealed box (1) to receive the iron oxide scale that detaches from both sides of the strip steel (10).

2. The surface oxide layer pretreatment device for the pickling unit according to claim 1, characterized in that, The blowing beams include an upper blowing beam located above the strip (10) and a lower blowing beam located below the strip (10). The blowing directions of the upper blowing beam and the lower blowing beam are configured to cause the iron oxide scale on the surface of the strip (10) to move from the middle of the strip (10) toward both sides in the width direction. The airflows sprayed by the upper blowing beam and the lower blowing beam at the inlet and the outlet respectively form an air curtain at the inlet and the outlet to block the dust from overflowing.

3. The surface oxide layer pretreatment device for the pickling unit according to claim 2, characterized in that, Both the upper and lower purging beams are V-shaped purging beams. Each V-shaped purging beam includes two symmetrically arranged air-blowing branch pipes along the width direction of the strip (10). The two air-blowing branch pipes extend obliquely from the middle of the strip (10) to both sides in the width direction.

4. The surface oxide layer pretreatment device for the pickling unit according to claim 3, characterized in that, Each of the air-blowing branch pipes is provided with an air-blowing hole. The air-blowing direction of the air-blowing hole is from the middle of the strip (10) outward and inclined towards the surface of the strip (10) to form a V-shaped airflow sweeping from the middle to both sides on the surface of the strip (10).

5. The surface oxide layer pretreatment device for the pickling unit according to claim 1, characterized in that, The suction port (5) is located on the side wall of the sealed box (1) and in the area between the upper brush roller (2) and the lower brush roller (3).

6. The surface oxide layer pretreatment device for the pickling unit according to claim 1, characterized in that, The lower part of the sealed box (1) contracts downward to form the collection funnel (6), and the bottom of the collection funnel (6) is provided with a discharge port (7) and a valve for opening and closing the discharge port (7).

7. The surface oxide layer pretreatment device for pickling units according to claim 1, characterized in that, The upper brush roller (2) and the lower brush roller (3) are driven to rotate by a motor (4), and the bristles of the upper brush roller (2) and the lower brush roller (3) are in contact with the upper and lower surfaces of the strip steel (10), respectively.

8. The surface oxide layer pretreatment device for the pickling unit according to claim 1, characterized in that, The sealed box (1) includes an upper box (11) and a lower box (12) that are connected vertically, and the upper box (11) and the lower box (12) are detachably connected.

9. The surface oxide layer pretreatment device for pickling units according to claim 8, characterized in that, A pressure adjustment assembly (14) is provided between the upper brush roller (2) and the lower brush roller (3). The pressure adjustment assembly (14) includes two nuts connected to the upper brush roller (2) and the lower brush roller (3) respectively, and a stud (141) connected to the nuts.

10. A system, characterized in that, include: The straightening machine (102), welding machine (103), tension straightening machine (106) and pickling process section are arranged on the running path of the strip steel. And at least two pretreatment devices for surface oxide layer of pickling unit as described in any one of claims 1-9, wherein one of the pretreatment devices is disposed between the straightening machine (102) and the welding machine (103) for removing iron oxide scale from the surface of strip steel (10) or the surface of strip steel treated by the straightening machine (102); the other pretreatment device is disposed between the tension leveling machine (106) and the pickling process section for removing iron oxide scale from the surface of strip steel treated by the tension leveling machine (106).

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