Descaling unit

Abstract

The utility model discloses a descaling unit, and relates to the technical field of acid-free descaling, the descaling unit comprises a conveying mechanism used for conveying a workpiece, the workpiece is provided with a first surface and a second surface which are oppositely arranged along the thickness direction, and the first surface or the second surface of the workpiece is used for being arranged on a bearing surface of the conveying mechanism; the descaling unit further comprises a turnover mechanism and a plurality of descaling mechanisms, the descaling mechanisms are sequentially arranged in the conveying direction of the conveying mechanism, and the bearing surface of the conveying mechanism faces a sand blasting outlet of the descaling mechanisms. The overturning mechanism is used for overturning the workpiece so that the multiple descaling mechanisms can conduct descaling on the first surface or the second surface. The device is simple and reasonable in arrangement, wide in application range, capable of continuously processing small-size and special-shaped plates in batches, and high in processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of acid-free descaling technology, specifically to a descaling unit. Background Technology

[0002] After leaving the factory, hot-rolled strip steel is cut into steel plates according to actual needs. Due to the hot rolling process of strip steel, oxides such as FeO, Fe3O4, and Fe2O3 are attached to the surface of the steel plate substrate. Downstream customers often require a relatively smooth and clean strip steel surface when using strip steel for processes such as cold rolling, stamping, and painting to improve the performance of their products and meet product requirements. During the hot rolling process, a dense coating of metal oxides (commonly known as scale) forms on the surface of the strip steel. The presence of scale makes it difficult to detect surface cracks in the material in advance, thus resulting in quality problems in the finished product; in addition, scale can easily be pressed into the surface of the steel, causing surface quality problems; furthermore, the presence of hard scale accelerates the wear of rolls or machines. Therefore, it is necessary to remove the iron oxide scale from the surface of the steel plate, i.e., descaling.

[0003] EPS (ECO Pickled Surface) is a green surface cleaning technology. This technology is a new physical descaling method that involves spraying a slurry of liquid carrier and abrasive onto the surface of a moving steel strip. By impacting the surface of the strip, it removes the iron oxide scale.

[0004] After steel coils are cut into workpieces as needed, their length and shape change. Existing descaling units are no longer able to meet the descaling requirements of workpieces that are too short after cutting (<2 meters), especially workpieces with a length of less than 1 meter. Utility Model Content

[0005] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a descaling unit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a descaling unit, comprising a conveying mechanism for conveying a workpiece, the workpiece having a first surface and a second surface arranged opposite to each other along the thickness direction, the first surface or the second surface of the workpiece being disposed on the bearing surface of the conveying mechanism; the descaling unit further comprises a flipping mechanism and a plurality of descaling mechanisms, the plurality of descaling mechanisms being arranged sequentially along the conveying direction of the conveying mechanism, the bearing surface of the conveying mechanism facing the sandblasting outlet of the descaling mechanism; the flipping mechanism is used to flip the workpiece so that the plurality of descaling mechanisms respectively descal the first surface or the second surface.

[0007] The invention offers the following advantages: It includes a flipping mechanism and multiple descaling mechanisms. The descaling mechanisms throw the sheet material from top to bottom, performing acid-free descaling only on the upper surface. After the first surface of the sheet material is treated, it is flipped over by the flipping device and enters other descaling mechanisms to treat the second surface, thus achieving cleaning of both surfaces. The equipment has a simple and reasonable layout. The wet shot blasting method used in the descaling mechanism is environmentally friendly and has a wide range of applications. Furthermore, it can continuously process small-sized and irregularly shaped sheets in batches with high processing efficiency.

[0008] Optionally, the flipping mechanism includes a flipping roller group, a clamping component, and a flipping component, wherein the clamping component and the flipping component are both disposed on the flipping roller group; the flipping roller group is used to flip under the drive of the flipping component, and the clamping component includes a first clamping member and a second clamping member, which cooperate with each other to clamp the workpiece during the flipping process of the flipping roller group.

[0009] Optionally, the flipping mechanism further includes a support frame, and the two sides of the flipping roller group are hinged to the support frame via a rotating shaft; the flipping assembly includes an angle detection sensor and a first driving device, both of which are located on one side of the support frame, and the output end of the first driving device is connected to one end of the rotating shaft. The angle detection sensor is used to detect the flipping angle of the flipping roller group relative to the support frame, and the first driving device is used to drive the flipping roller group to flip according to the angle detected by the angle detection sensor.

[0010] Optionally, the flipping mechanism further includes a centering component disposed on the flipping roller group. The centering component is used to push the workpiece to the preset position when the workpiece deviates from the preset position, wherein the center of the workpiece in the width direction at the preset position coincides with the center of the conveying mechanism in the width direction.

[0011] Optionally, the centering component includes a position detection sensor and multiple linear telescopic devices. The position detection sensor is used to detect the position of the workpiece and send a detection signal characterizing the position of the workpiece to a control device. Both the position detection sensor and the linear telescopic devices are disposed on the flipping roller group. The linear telescopic devices are used to push the workpiece to a preset position according to the control signal sent by the control device. The control device is used to generate the control signal according to the detection signal.

[0012] Optionally, the reversing roller group includes a first roller group and a second roller group arranged opposite to each other along the height direction of the conveying mechanism, and a channel extending along the conveying direction of the conveying mechanism is formed between the first roller group and the second roller group; the first clamping member and the second clamping member are respectively arranged on both sides of the reversing roller group in the height direction of the conveying mechanism.

[0013] Optionally, the descaling mechanism is provided with one or more descaling nozzles arranged sequentially along the conveying direction above the conveying mechanism. Each descaling nozzle is provided with a sandblasting outlet, which faces the discharge end of the descaling mechanism, and the sandblasting direction of the sandblasting outlet intersects with the conveying direction of the conveying mechanism.

[0014] Optionally, the descaling nozzle forms a spray area on the bearing surface of the conveying mechanism, and the spray areas formed by two adjacent descaling nozzles at least partially overlap.

[0015] Optionally, the conveying mechanism includes multiple circulating conveyor belts and multiple conveyor roller groups. The circulating conveyor belts are correspondingly arranged within the descaling mechanism, and the descaling mechanism has a sandblasting outlet above the circulating conveyor belts. The conveyor roller groups are correspondingly arranged between two adjacent descaling mechanisms. Each conveyor roller group includes two sections of conveyor roller groups, and the flipping mechanism is arranged between the two sections of conveyor roller groups.

[0016] Optionally, the circulating conveyor belt includes a conveyor support and a conveyor belt component. The conveyor belt component is connected to the conveyor support via a conveyor belt shaft. Multiple gaps are formed on the conveyor belt component, which are used to allow the solid-liquid mixture sprayed from the descaling nozzle to pass through.

[0017] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a side view of the present invention (the centering component is not shown in the figure).

[0020] Figure 2 This is a top view of the present invention (the clamping assembly is not shown in the figure, and the workpiece is located in a preset position).

[0021] Figure 3 This is a top view of the present invention (the clamping component is not shown in the figure, and the workpiece has deviated from the preset position after passing through the first descaling mechanism).

[0022] Figure 4This is a top view of the present invention (the clamping component is not shown in the figure; the workpiece is located on the flipping mechanism, and the centering component adjusts it to a preset position).

[0023] Figure 5 This is a side view of the flipping mechanism of this utility model (the centering component is not shown in the figure).

[0024] Figure 6 This is a top view of the flipping mechanism of this utility model (the clamping component is not shown in the figure).

[0025] Figure 7a -c is a schematic diagram of the flipping process of the flipping mechanism of this utility model.

[0026] Among them, 1. First descaling mechanism; 2. First mesh belt conveyor assembly; 3. First conveyor roller assembly; 4. Tilting mechanism; 41. First clamping member; 42. Second clamping member; 43. First linear telescopic device; 44. Second linear telescopic device; 45. First driving device; 5. Workpiece; 6. Second descaling mechanism; 7. Descaling nozzle. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0028] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0029] In related technologies, descaling units are mostly used for descaling medium and long plates. The plates are conveyed by driven conveyor rollers and pinch rollers. When the plates pass through the sandblasting area, at least one set of pinch rollers is required to clamp the plates to ensure stable transport. The descaling unit has descaling nozzles symmetrically arranged on the upper and lower sides of the conveying mechanism so that both the upper and lower surfaces of the plates can be cleaned simultaneously. The descaling unit thoroughly mixes water with a certain pressure and steel shot of a certain concentration. The resulting high-energy solid-liquid two-phase flow is sprayed from the descaling nozzles. The upper and lower surfaces of the plates are simultaneously subjected to the impact of the liquid-solid jet, generating instantaneous impact force, which may cause the plates to deviate from their original transport direction. Therefore, pinch rollers and conveyor rollers are essential for clamping and transporting the plates before and after the sandblasting descaling process. However, after steel coils are cut into workpieces as needed, their length and shape change. When cleaning these workpieces in existing descaling units, they cannot be fixed in place. This is mainly because the distance between the two sets of pinch rollers before and after the sandblasting area cannot be reduced. Reducing the distance would cause significant wear and tear on the pinch rollers due to the sandblasting process. Currently, the pinch roller distance in existing sheet metal equipment is around 1100mm. This means that if the sheet length is less than twice the distance, there is a risk of jamming, making proper cleaning impossible. In actual production, cleaning sheet lengths less than 2m is quite difficult. Therefore, existing descaling units cannot be used for descaling workpieces that are too short after cutting.

[0030] In view of this, this embodiment provides a descaling unit, as shown in the attached drawing. Figure 1-2 A descaling unit includes a conveying mechanism for conveying a workpiece 5. The workpiece 5 has a first surface and a second surface arranged opposite to each other along the thickness direction. The first surface or the second surface of the workpiece 5 is used to be disposed on the bearing surface of the conveying mechanism. The descaling unit also includes a flipping mechanism 4 and a plurality of descaling mechanisms. The plurality of descaling mechanisms are arranged sequentially along the conveying direction of the conveying mechanism. The bearing surface of the conveying mechanism faces the sandblasting outlet of the descaling mechanism. The flipping mechanism 4 is used to flip the workpiece 5 so that the plurality of descaling mechanisms respectively descale the first surface or the second surface. Figure 1 In the diagram, the horizontal arrow indicates the conveying direction of the conveying mechanism, and the oblique arrow indicates the spraying direction of the sandblasting outlet of the descaling mechanism.

[0031] In this embodiment, refer to the appendix. Figure 5-6 The flipping mechanism 4 includes a flipping roller group, a clamping component, and a flipping component. The clamping component and the flipping component are both disposed on the flipping roller group. The flipping roller group is used to flip under the drive of the flipping component. The clamping component includes a first clamping member 41 and a second clamping member 42. The first clamping member 41 and the second clamping member 42 cooperate with each other to clamp the workpiece 5 during the flipping process of the flipping roller group.

[0032] The flipping mechanism 4 also includes a support frame, with both sides of the flipping roller group hinged to the support frame via a rotating shaft. The flipping assembly includes an angle detection sensor and a first driving device 45, both located on one side of the support frame. The output end of the first driving device 45 is connected to one end of the rotating shaft. The angle detection sensor detects the flipping angle of the flipping roller group relative to the support frame, and the first driving device drives the flipping roller group to flip based on the angle detected by the angle detection sensor. Generally, the size of the workpiece should be smaller than the size of the flipping roller group so that the workpiece can fully enter the channel of the flipping roller group. Different specifications of flipping roller groups can be set according to requirements. In some other embodiments, the flipping assembly also includes a telescopic mechanism and a base. The support frame is connected to the base via the telescopic mechanism to accommodate workpieces of more sizes. After the workpiece enters the flipping assembly, the telescopic mechanism can raise it before flipping.

[0033] The flipping mechanism 4 further includes a centering component disposed on the flipping roller group. This centering component is used to push the workpiece 5 to the preset position when the workpiece 5 deviates from the preset position, wherein the center of the workpiece in the width direction at the preset position coincides with the center of the conveying mechanism in the width direction. The centering component includes a position detection sensor and multiple linear telescopic devices. The position detection sensor is used to detect the position of the workpiece and send a detection signal characterizing the position of the workpiece to a control device. Both the position detection sensor and the linear telescopic devices are disposed on the flipping roller group. The linear telescopic devices are used to push the workpiece 5 to the preset position according to the control signal sent by the control device, wherein the control device is used to generate the control signal based on the detection signal. Specifically, the linear telescopic device is a servo electric cylinder or a hydraulic cylinder. Taking a hydraulic cylinder as an example, the cylinder body of the hydraulic cylinder is connected to one side of the flipping roller group in the width direction, and the piston rod of the hydraulic cylinder is connected to a push rod. The end of the push rod is used to push the workpiece 5. In some other embodiments, a CCD lens can be used to detect the position of the workpiece. When the workpiece is first placed on the conveying mechanism and has not yet been processed by the descaling mechanism, the edge of the workpiece detected by the CCD lens is a preset position. Then, the image is used as a reference. When the workpiece is in the flipping mechanism, the image formed is compared with the reference image to generate a control signal.

[0034] In this embodiment, the tumbling roller group includes a first roller group and a second roller group arranged opposite to each other along the height direction of the conveying mechanism, and a channel extending along the conveying direction of the conveying mechanism is formed between the first roller group and the second roller group; the first clamping member 41 and the second clamping member 42 are respectively arranged on both sides of the tumbling roller group in the height direction of the conveying mechanism; the linear telescopic device includes a first linear telescopic device 43 and a second linear telescopic device 44, and the linear telescopic devices are respectively arranged on both sides of the tumbling roller group in the width direction of the conveying mechanism.

[0035] The centering process of the flipping mechanism is as follows: Figure 3 As shown, after the workpiece 5 is cleaned by the first descaling mechanism, it deviates from its preset position due to the instantaneous impact force generated by the liquid-solid jet. The preset position is the center position of the conveying mechanism along its width. Figure 4 As shown, the workpiece enters the flipping mechanism, and the centering component pushes the workpiece to a preset position to complete the centering of the workpiece.

[0036] The flipping process of the flipping mechanism is as follows: Figure 7a As shown, the tilting roller group has an A port and a B port. At this time, the A port is located on the left side of the tilting mechanism, and the B port is located on the right side of the tilting mechanism. The first surface of the workpiece 5 faces upwards, and the workpiece 5 enters the channel of the tilting roller group from the A port. The centering assembly, namely the first linear telescopic device 43 and the second linear telescopic device 44, centers the workpiece 5. Figure 7b As shown, after workpiece 5 is aligned, the flipping mechanism rotates clockwise, and the A port of the flipping roller group flips to the top and the B port flips to the bottom. During this process, the clamping components, namely the first clamping member 41 and the second clamping member 42, always clamp the workpiece 5; Figure 7c As shown, the flipping mechanism flips 180 degrees. At this time, port B is located on the left side of the flipping mechanism and port A is located on the right side of the flipping mechanism. The second surface of the workpiece 5 faces upward, and the workpiece 5 leaves the flipping roller group from port A and enters the next descaling mechanism for cleaning.

[0037] In this embodiment, the descaling mechanism includes a first descaling mechanism 1 and a second descaling mechanism 6, with a flipping mechanism 4 provided between them. The descaling mechanism has one or more descaling nozzles arranged sequentially along the conveying direction above the circulating conveyor belt. The sandblasting outlet of the descaling nozzle faces the discharge end of the descaling mechanism, and the sandblasting direction of the outlet intersects with the conveying direction of the circulating conveyor belt. As an optional embodiment, the multiple descaling nozzles are not collinear; the descaling nozzles form spraying areas on the bearing surface of the circulating conveyor belt, and the spraying areas formed by two adjacent descaling nozzles at least partially overlap. In other embodiments, the multiple descaling nozzles are collinear.

[0038] The conveying mechanism includes multiple circulating conveyor belts and multiple conveyor roller sets. The circulating conveyor belts are correspondingly arranged within the descaling mechanism. The descaling mechanism has a sandblasting outlet above the circulating conveyor belts, but no sandblasting outlet below them. The descaling mechanisms all throw the sheet metal from top to bottom. After the workpiece's upper surface is impacted, it presses against the bearing surface of the circulating conveyor belt. Therefore, it is not necessary to use clamping rollers or a coiling machine to pull the steel strip at both ends. The conveyor roller sets are correspondingly arranged between two adjacent descaling mechanisms. Each conveyor roller set includes two sections, and the flipping mechanism 4 is arranged between the two sections.

[0039] The circulating conveyor belt includes a conveyor support and a conveyor belt. The conveyor belt is connected to the conveyor support via a belt shaft. Multiple perforated gaps are formed on the conveyor belt to allow abrasive and water sprayed from the descaling nozzle to pass through. The conveyor belt ensures the transport of workpieces without affecting the cleaning effect of the descaling nozzle. In some embodiments of this invention, a cleaning device is provided at the bottom of the circulating conveyor belt. The cleaning device includes a cleaning roller assembly and brushes mounted on the cleaning roller assembly. The cleaning device is used to scrape off impurities adhering to the conveyor belt.

[0040] This invention features two descaling mechanisms that throw the sheet metal from top to bottom. The conveying mechanism is a mesh belt structure. The descaling mechanism only performs acid-free descaling on the upper surface of the sheet metal. After the first descaling mechanism completes the process, the sheet metal is flipped over by a turning device and then enters the second descaling mechanism for further processing, thus achieving cleaning of both surfaces of the workpiece. This equipment has a simple and reasonable layout. The wet shot blasting method used in the descaling mechanism is environmentally friendly and has a wide range of applications. It can continuously process small-sized and irregularly shaped sheets in batches with high processing efficiency.

[0041] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A descaling unit, comprising a conveying mechanism for conveying a workpiece (5), the workpiece (5) having a first surface and a second surface disposed opposite to each other along the thickness direction, the first surface or the second surface of the workpiece (5) being disposed on a bearing surface of the conveying mechanism; characterized in that, The descaling unit also includes a flipping mechanism (4) and multiple descaling mechanisms. The multiple descaling mechanisms are arranged sequentially along the conveying direction of the conveying mechanism, and the bearing surface of the conveying mechanism faces the sandblasting outlet of the descaling mechanism. The flipping mechanism (4) is used to flip the workpiece (5) so that the multiple descaling mechanisms can descale the first surface or the second surface respectively.

2. The descaling unit according to claim 1, characterized in that, The flipping mechanism (4) includes a flipping roller group, a clamping component and a flipping component. The clamping component and the flipping component are both disposed on the flipping roller group. The flipping roller group is used to flip under the drive of the flipping component. The clamping component includes a first clamping member (41) and a second clamping member (42). The first clamping member (41) and the second clamping member (42) cooperate with each other to clamp the workpiece (5) during the flipping process of the flipping roller group.

3. The descaling unit according to claim 2, characterized in that, The flipping mechanism (4) also includes a bracket, and the two sides of the flipping roller group are hinged to the bracket by a rotating shaft; the flipping assembly includes an angle detection sensor and a first driving device (45), the angle detection sensor and the first driving device (45) are both located on one side of the bracket, the output end of the first driving device (45) is connected to one end of the rotating shaft, the angle detection sensor is used to detect the flipping angle of the flipping roller group relative to the bracket, and the first driving device is used to drive the flipping roller group to flip according to the angle detected by the angle detection sensor.

4. The descaling unit according to claim 2, characterized in that, The flipping mechanism (4) further includes a centering component disposed on the flipping roller group. The centering component is used to push the workpiece (5) to the preset position when the workpiece (5) deviates from the preset position, wherein the center of the workpiece in the width direction at the preset position coincides with the center of the conveying mechanism in the width direction.

5. The descaling unit according to claim 4, characterized in that, The centering component includes a position detection sensor and multiple linear telescopic devices. The position detection sensor is used to detect the position of the workpiece and send a detection signal characterizing the position of the workpiece to a control device. The position detection sensor and the linear telescopic devices are both mounted on the flipping roller group. The linear telescopic devices are used to push the workpiece (5) to a preset position according to the control signal sent by the control device. The control device is used to generate the control signal according to the detection signal.

6. The descaling unit according to claim 2, characterized in that, The tumbling roller assembly includes a first roller assembly and a second roller assembly arranged opposite each other along the height direction of the conveying mechanism, and a channel extending along the conveying direction of the conveying mechanism is formed between the first roller assembly and the second roller assembly; the first clamping member (41) and the second clamping member (42) are respectively arranged on both sides of the tumbling roller assembly in the height direction of the conveying mechanism.

7. The descaling unit according to any one of claims 1-6, characterized in that, The descaling mechanism is provided with one or more descaling nozzles arranged sequentially along the conveying direction above the conveying mechanism. Each descaling nozzle is provided with a sandblasting outlet, which faces the discharge end of the descaling mechanism, and the sandblasting direction of the sandblasting outlet intersects with the conveying direction of the conveying mechanism.

8. The descaling unit according to claim 7, characterized in that, The descaling nozzle forms a spray area on the bearing surface of the conveying mechanism, and the spray areas formed by two adjacent descaling nozzles at least partially overlap.

9. The descaling unit according to claim 7, characterized in that, The conveying mechanism includes multiple circulating conveyor belts and multiple conveyor roller groups. The circulating conveyor belts are correspondingly arranged inside the descaling mechanism. The descaling mechanism is provided with a sandblasting outlet above the circulating conveyor belts. The conveyor roller groups are correspondingly arranged between two adjacent descaling mechanisms. The conveyor roller groups include two sections of conveyor roller groups, and the flipping mechanism (4) is provided between the two sections of conveyor roller groups.

10. The descaling unit according to claim 9, characterized in that, The circulating conveyor belt includes a conveyor support and a conveyor belt component. The conveyor belt component is connected to the conveyor support via a conveyor belt shaft. Multiple gaps are formed on the conveyor belt component, which are used to allow the solid-liquid mixture sprayed from the descaling nozzle to pass through.

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