CN218779032U - Broadband sheet stainless steel pickling and squeezing device - Google Patents
Broadband sheet stainless steel pickling and squeezing device Download PDFInfo
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- CN218779032U CN218779032U CN202222901269.XU CN202222901269U CN218779032U CN 218779032 U CN218779032 U CN 218779032U CN 202222901269 U CN202222901269 U CN 202222901269U CN 218779032 U CN218779032 U CN 218779032U
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Abstract
The utility model discloses a broadband sheet stainless steel pickling and squeezing device, which comprises a support frame, a water collecting tank, a lower squeezing roller, an upper squeezing roller, an adjusting mechanism, a cleaning mechanism, a back-up roller and a spraying and flushing mechanism; the supporting frames are provided with a pair of supporting frames which are symmetrically fixed on two side walls of the water collecting tank; the adjusting mechanisms are provided with a pair of adjusting mechanisms and are arranged on the corresponding supporting frames, and two ends of the upper drying roll are respectively connected to the corresponding adjusting mechanisms; two ends of the lower drying roll are connected to the support frames through bearings, and a pair of cleaning mechanisms are symmetrically arranged on the support frames above the upper drying roll; the spraying and flushing mechanism is positioned on one side of the support frame and is fixed at the top end of the water collecting tank; two ends of the supporting roller are connected to the water collecting tank through bearings; the cleaning mechanism comprises a cleaning brush, a moving frame I, a moving frame II, a supporting plate, a motor I, a movable rod, a connecting rod, a guide rod and a motor II. The utility model discloses can clear up the squeeze roll, prevent that defects such as colour difference, pickling decorative pattern from appearing on broadband sheet metal stainless steel surface.
Description
Technical Field
The utility model belongs to the technical field of the pickling of broadband sheet metal stainless steel, in particular to broadband sheet metal stainless steel pickling wiping arrangement.
Background
At present, in the steel rolling industry, a narrow strip with a wide strip less than 1m is defined, a wide strip with a wide strip greater than 1m is defined, a medium wide strip with a wide strip greater than 0.6m and less than 1.2m is also defined, and a wide strip with a wide strip greater than 1.2m and less than 1.7m is strictly defined, especially for a wide-strip stainless steel composite plate, the steel strip is wider, the surface area exposed to air is larger, and the surface quality control of the steel strip is more difficult; stainless steel with the thickness less than or equal to 0.3mm and the thickness as thin as 0.01mm is generally called ultra-thin stainless steel, belongs to the field of stainless steel special precision, and has the market characteristics of small quantity, variety, strict quality requirement, high technical content requirement and high added value, the plate thickness can be reduced due to the reinforcement of the steel, the structural member is light in weight, and the service life can be prolonged.
After annealing, the surface of the wide-band thin stainless steel band is easy to produce oxide to form a covering layer, the oxide covering layer needs to be removed through acid washing, and in order to remove residual liquid such as residual acid, residual water and the like on the surface of the wide-band thin stainless steel band, a wringing roller set is usually arranged, so that the surface of the wide-band thin stainless steel band is kept clean and dry when entering the next process.
Through retrieval, the stainless steel pickling and squeezing device capable of spraying acid and washing comprises a pickling tank, a squeezing box, an acid storage tank, a circulating pump and a rack, wherein an upper spray pipe and a lower spray pipe which are parallel to each other are arranged in a cavity of the squeezing box, the upper spray pipe and the lower spray pipe are positioned between a middle opening and an upper squeezing roller, through holes are uniformly distributed on the side walls of the upper spray pipe and the lower spray pipe, and the upper spray pipe and the lower spray pipe are communicated with a main liquid supply pipe through an auxiliary liquid supply pipe; the following problems arise in use: the surfaces of the broadband sheet stainless steel after being pickled in the pickling tank are sprayed and washed again through the upper spray pipe and the lower spray pipe, so that sludge attached to the surfaces of the steel strips cannot be completely removed; the residual sludge can be adhered to the drying roller, the sludge can be gradually enlarged, increased and hardened along with the rotation of the drying roller, the drying effect is influenced, most importantly, the surface of the broadband sheet stainless steel is not uniformly corroded, the quality of the broadband sheet stainless steel product is seriously influenced, and the defects of color difference, acid pickling patterns and the like are easily caused.
Disclosure of Invention
The utility model aims at overcoming not enough among the prior art, providing a broadband sheet metal stainless steel pickling wiping arrangement, can adapt to the broadband sheet metal stainless steel of different thickness, can clear up the squeeze roll, prevent defects such as colour difference, pickling decorative pattern from appearing on broadband sheet metal stainless steel surface.
In order to realize the purpose, the utility model discloses a technical scheme be:
a broadband sheet stainless steel pickling and squeezing device comprises a support frame, a water collecting tank, a lower squeezing roller, an upper squeezing roller, an adjusting mechanism, a cleaning mechanism, a supporting roller and a spraying and flushing mechanism; the supporting frames are provided with a pair of supporting frames which are symmetrically fixed on two side walls of the water collecting tank, and the supporting frames are provided with guide grooves; the adjusting mechanisms are provided with a pair of adjusting mechanisms and are arranged on the corresponding supporting frames, and two ends of the upper drying roll are respectively connected with the corresponding adjusting mechanisms; two ends of the lower squeezing roller are connected to the support frame through bearings, and one end of the lower squeezing roller is provided with a motor V; the brush is positioned on the supporting frame at one side of the lower wringing roller; the cleaning mechanisms are provided with a pair of cleaning mechanisms which are symmetrically arranged on the supporting frames above the upper drying rollers; the spraying and flushing mechanism is positioned on one side of the support frame and is fixed at the top end of the water collecting tank; two ends of the supporting roll are connected to the water collecting tank through bearings, and one end of the supporting roll is provided with a motor IV.
The cleaning mechanism comprises a cleaning brush, a moving frame I, a moving frame II, a supporting plate, a motor I, a movable rod, a connecting rod, a guide rod, a motor II and a moving plate; the supporting plates are provided with a pair of supporting plates which are fixed on the side wall of the supporting frame, the top ends of the supporting plates are provided with a limiting groove I and a limiting groove II, and the limiting groove I is positioned on one side of the limiting groove II; the moving frame I and the moving frame II are symmetrically connected in a limiting groove I at the top end of the supporting plate, a rack I is arranged at the upper end of the moving frame I, and a rack II is arranged at the lower end of the moving frame II; the bottom end of the moving plate is positioned in the limiting groove II, and two ends of the guide rod are fixed on the corresponding moving plate; the cleaning brush is positioned on the guide rod, and one side of the cleaning brush provided with the brush is in arc contact with the outer side wall of the upper drying roller; the motor I is provided with a pair of moving rods which are respectively fixed on the outer side walls of the moving frame I and the moving frame II, and one end of each moving rod is connected to the output end of the motor I; one end of the connecting rod is connected with the other end of the movable rod, and the other end of the connecting rod is connected to the cleaning brush; the motor II is positioned at the top end of the support frame on one side of the moving frame, and an output shaft of the motor II is provided with a gear; the gear is meshed with the rack I and the rack II; when the upper drying roller needs to be cleaned, the adjusting mechanism drives the upper drying roller to move upwards, the upper drying roller is located between the cleaning brushes, the motor II provides power to drive the moving frame I and the moving frame II to move along the limiting groove I on the supporting plate through the gear, the rack I and the rack II, the moving frame I and the moving frame II drive the corresponding movable rod, the connecting rod and the cleaning brushes to move, and when the cleaning brushes are in contact with the outer surface of the upper drying roller, the motor II stops; the motor I provides power to drive the movable rod to swing between the limiting blocks, and the movable rod drives the cleaning brush to reciprocate along the guide rod through the connecting rod, so that the upper wiping roller is cleaned, and the defects of color difference, acid pickling patterns and the like on the surface of the broadband sheet stainless steel are prevented.
The adjusting mechanism comprises a screw rod, a motor III and a moving plate; two ends of the screw rod are connected to the support frame through bearings, the motor III is located at the top end of the support frame, an output shaft of the motor III is connected with one end of the screw rod, the moving plate is installed in a guide groove of the support frame, and the moving plate is connected with the screw rod through threads; two ends of the upper drying roller are connected to one end of the movable plate, which is far away from the screw rod, through bearings; the motor III provides power to drive the screw rod to rotate, the screw rod drives the movable plate to move up and down through threads, and the movable plate drives the upper drying roller to move up and down; on the one hand, the distance between the upper wringing roller and the lower wringing roller can be adjusted, so that the device is suitable for the broadband sheet stainless steel with different thicknesses, and on the other hand, the upper wringing roller can be driven to move upwards to enter the cleaning mechanism for cleaning.
The spraying and flushing mechanism comprises a connecting pipe, a spraying and flushing pipe, a spray head, a mounting frame and a water pump; the mounting frame is fixed at the top end of the water collecting tank, the spraying and flushing pipe is in a herringbone shape, so that sludge on the broadband thin stainless steel plate can conveniently enter the water collecting tank through two sides of the broadband thin stainless steel plate, the spraying and flushing pipe is provided with a plurality of spray heads, and one end of the spraying and flushing pipe is connected to the mounting frame; one end of the water pump is connected to the water collecting tank, one end of the connecting pipe is connected to the water pump, the other end of the connecting pipe is connected with the spraying pipe, and a filter screen is arranged at one end of the connecting pipe, which is positioned in the water collecting tank; the water pump provides power to drive clear water to enter the spraying and flushing pipe through the connecting pipe, and then the clear water is sprayed out through the spray head on the spraying and flushing pipe to flush the sludge on the surface of the broadband sheet stainless steel, so that the sludge on the surface of the broadband sheet stainless steel is reduced.
Compared with the prior art, the utility model beneficial effect shows:
1) When the upper drying roller needs to be cleaned, the adjusting mechanism drives the upper drying roller to move upwards, the upper drying roller is positioned between the cleaning brushes, the motor II provides power to drive the moving frame I and the moving frame II to move along the limiting groove I on the supporting plate through the gear, the rack I and the rack II, the moving frame I and the moving frame II drive the corresponding movable rod, the connecting rod and the cleaning brushes to move, and when the cleaning brushes are in contact with the outer surface of the upper drying roller, the motor II stops; the motor I provides power to drive the movable rod to swing above the supporting plate, and the movable rod drives the cleaning brush to reciprocate along the guide rod through the connecting rod, so that the upper wiping roller is cleaned, and the defects of color difference, acid pickling patterns and the like on the surface of the broadband sheet stainless steel are prevented;
2) The motor III provides power to drive the screw rod to rotate, the screw rod drives the movable plate to move up and down through threads, and the movable plate drives the upper drying roller to move up and down; on the one hand, the distance between the upper wringing roller and the lower wringing roller can be adjusted, so that the device is suitable for the broadband sheet stainless steel with different thicknesses, and on the other hand, the upper wringing roller can be driven to move upwards to enter the cleaning mechanism for cleaning.
Drawings
FIG. 1 is a schematic structural view I of a stainless steel pickling and squeezing device for a broadband sheet of the present invention;
FIG. 2 is a schematic structural view of a broadband sheet stainless steel pickling and squeezing device of the present invention;
FIG. 3 is a schematic structural view of a cleaning mechanism in the stainless steel pickling and squeezing device for the broadband sheet of the present invention;
FIG. 4 is a schematic structural view of an adjusting mechanism in the broadband sheet stainless steel pickling and squeezing device of the present invention;
FIG. 5 is an enlarged schematic view of the portion A of FIG. 4;
FIG. 6 is a schematic structural view of a spraying and punching mechanism in the stainless steel pickling and squeezing device for the broadband sheet of the utility model;
in the figure: 1. a support frame; 101. a guide groove; 2. a water collecting tank; 3. a lower wringing roller; 301. a motor V; 4. an upper wringing roller; 5. an adjustment mechanism; 501. a lead screw; 502. a motor III; 503. moving the plate; 6. a cleaning mechanism; 601. cleaning a brush; 602. a moving frame I; 6021. a rack I; 603. a moving frame II; 6031. a rack II; 604. a support plate; 6041. a limiting groove I; 6042. a limiting groove II; 605. a motor I; 606. a movable rod; 607. a connecting rod; 608. a guide rod; 609. a motor II; 6091. a gear; 610. moving the plate; 7. a support roll; 701. a motor IV; 8. a spray rinsing mechanism; 801. a connecting pipe; 802. spraying and washing the pipe; 803. a spray head; 804. a mounting frame; 805. a water pump; 9. broadband sheet stainless steel; 11. and (4) a brush.
Detailed Description
In order to facilitate understanding of those skilled in the art, the technical solution of the present invention is further specifically described below with reference to fig. 1 to 6.
A broadband sheet stainless steel pickling and squeezing device comprises a support frame 1, a water collecting tank 2, a lower squeezing roller 3, an upper squeezing roller 4, an adjusting mechanism 5, a cleaning mechanism 6, a supporting roller 7, a spraying and flushing mechanism 8 and a brush 11; the supporting frames 1 are provided with a pair of supporting frames, the supporting frames are symmetrically fixed on two side walls of the water collecting tank 2, and the supporting frames 1 are provided with guide grooves 101; the adjusting mechanisms 5 are provided with a pair and are arranged on the corresponding support frames 1, and two ends of the upper drying roller 4 are respectively connected with the corresponding adjusting mechanisms 5; two ends of the lower squeezing roller 3 are connected to the support frame 1 through bearings, and one end of the lower squeezing roller is provided with a motor V301; the brushes 11 are positioned on the support frame 1 at one side of the lower drying roller 3, and the cleaning mechanisms 6 are provided with a pair and symmetrically arranged on the support frame 1 above the upper drying roller 4; the spraying and flushing mechanism 8 is positioned on one side of the support frame 1 and is fixed at the top end of the water collecting tank 2; two ends of the supporting roller 7 are connected to the water collecting tank 2 through bearings, and one end of the supporting roller 7 is provided with a motor IV 701.
The cleaning mechanism 6 comprises a cleaning brush 601, a moving frame I602, a moving frame II 603, a supporting plate 604, a motor I605, a moving rod 606, a connecting rod 607, a guide rod 608, a motor II 609 and a moving plate 610; the supporting plate 604 is provided with a pair of supporting plates which are fixed on the side wall of the supporting frame 1, the top end of the supporting plate 604 is provided with a limiting groove I6041 and a limiting groove II 6042, and the limiting groove I6041 is positioned on one side of the limiting groove II 6042; the moving frame I602 and the moving frame II 603 are symmetrically connected in a limiting groove I6041 at the top end of the supporting plate 604, a rack I6021 is arranged at the upper end of the moving frame I602, and a rack II 6031 is arranged at the lower end of the moving frame II 603; the bottom end of the moving plate 610 is located in a limiting groove II 6042, and two ends of the guide rod 608 are fixed on the moving plate 610; the cleaning brush 601 is positioned on the guide rod 608, and one side of the cleaning brush 601 provided with the brush is in arc contact with the outer side wall of the upper drying roller 4; the motor I605 is provided with a pair of fixed parts which are respectively arranged on the outer side walls of the moving frame I602 and the moving frame II 603, and one end of the movable rod 606 is connected with the output end of the motor I605; one end of the connecting rod 607 is connected with the other end of the movable rod 606, and the other end is connected to the cleaning brush 601; the motor II 609 is positioned at the top end of the support frame 1 at one side of the moving frame I602, and a gear 6091 is arranged on an output shaft of the motor II 609; the gear 6091 is meshed with the rack I6021 and the rack II 6031; when the upper drying roller 4 needs to be cleaned, the adjusting mechanism 5 drives the upper drying roller 4 to move upwards, the upper drying roller 4 is positioned between the cleaning brushes 601, the motor II 609 provides power to drive the moving frame I602 and the moving frame II 603 to move along the limiting groove I6041 on the supporting plate 604 through the gear 6091, the rack I6021 and the rack II 6031, the moving frame I602 and the moving frame II 603 drive the corresponding movable rod 606, the connecting rod 607 and the cleaning brushes 601 to move, and when the cleaning brushes 601 are in contact with the outer surface of the upper drying roller 4, the motor II 609 stops; motor I605 provides power and drives movable rod 606 and swing above the backup pad, and movable rod 606 passes through connecting rod 607 and drives clearance brush 601 along guide bar 608 reciprocating motion to reach the crowded dry roll 4 in clearance, prevent that the broadband sheet metal stainless steel 9 surface from appearing the effect of defects such as colour difference, pickling pattern.
The adjusting mechanism 5 comprises a lead screw 501, a motor III 502 and a moving plate 503; two ends of a screw 501 are connected to a support frame 1 through bearings, a motor III 502 is positioned at the top end of the support frame 1, an output shaft of the motor III 502 is connected with one end of the screw 501, a moving plate 503 is installed in a guide groove 101 of the support frame 1, and the moving plate 503 is connected with the screw 501 through threads; two ends of the upper drying roller 4 are connected to one end of the moving plate 503 far away from the screw 501 through bearings; the motor III 502 provides power to drive the screw rod 501 to rotate, the screw rod 501 drives the moving plate 503 to move up and down through threads, and the moving plate 503 drives the upper drying roller 4 to move up and down; on the one hand, the distance between the upper drying roller 4 and the lower drying roller 3 can be adjusted, so that the device is suitable for the broadband sheet stainless steel 9 with different thicknesses, and on the other hand, the upper drying roller 4 can be driven to move upwards to enter the cleaning mechanism 6 for cleaning.
The spraying and flushing mechanism 8 comprises a connecting pipe 801, a spraying and flushing pipe 802, a spray head 803, a mounting rack 804 and a water pump 805; the mounting frame 804 is fixed at the top end of the water collecting tank 2, the spraying and flushing pipe 802 is in a herringbone shape, so that sludge on the broadband thin plate stainless steel 9 can conveniently enter the water collecting tank through two sides of the broadband thin plate stainless steel 9, the spraying and flushing pipe 802 is provided with a plurality of spray heads 803, and one end of the spraying and flushing pipe 802 is connected to the mounting frame 804; one end of a water pump 805 is connected in the water collecting tank 2, one end of a connecting pipe 801 is connected to the water pump 805, the other end of the connecting pipe 801 is connected with a spraying pipe 802, and a filter screen is arranged at one end, located in the water collecting tank 2, of the connecting pipe 801; the water pump 805 provides power to drive clean water to enter the spraying and washing pipe 802 through the connecting pipe 801, and then the clean water is sprayed out through the spray nozzle 803 on the spraying and washing pipe 802 to wash the sludge on the surface of the broadband thin plate stainless steel, so that the sludge on the surface of the broadband thin plate stainless steel is reduced.
A broadband sheet stainless steel pickling and squeezing device comprises the following working processes: the pickled broadband thin stainless steel is conveyed by the supporting roller, the broadband thin stainless steel is conveyed to the spraying and flushing mechanism, and the spraying and flushing mechanism is used for spraying and flushing the broadband thin stainless steel, so that sludge attached to the surface of the broadband thin stainless steel is reduced; then according to the thickness of the broadband sheet stainless steel, the motor III provides power to drive the screw rod to rotate, the screw rod drives the movable plate to move up and down through threads, and the movable plate drives the upper drying roller to move up and down, so that the distance between the upper drying roller and the lower drying roller is adjusted; squeezing the pickling solution on the broadband sheet stainless steel under the action of the upper squeezing roller and the lower squeezing roller; after the process of squeezing the broadband sheet stainless steel is finished, if the upper squeezing roller needs to be cleaned, the upper squeezing roller is driven to move upwards through the adjusting mechanism and is positioned between the cleaning brushes, the motor II provides power to drive the moving frame I and the moving frame II to move along the limiting groove I on the supporting plate through the gear, the rack I and the rack II, the moving frame I and the moving frame II drive the corresponding movable rod, the connecting rod and the cleaning brushes to move, and when the cleaning brushes are in contact with the outer surface of the upper squeezing roller, the motor II stops; the motor I provides power to drive the movable rod to swing between the limiting blocks, and the movable rod drives the cleaning brush to reciprocate along the guide rod through the connecting rod, so that the upper wiping roller is cleaned, and the defects of color difference, acid pickling patterns and the like on the surface of the broadband sheet stainless steel are prevented.
The foregoing is illustrative and explanatory only of the structure of the present invention, and it is intended that those skilled in the art who have the structure described herein be able to make various modifications, additions or substitutions in the same manner as the above-described embodiments without departing from the structure of the present invention or exceeding the scope defined by the claims.
Claims (3)
1. A broadband sheet stainless steel pickling and squeezing device comprises a support frame, a water collecting tank, a lower squeezing roller, an upper squeezing roller, an adjusting mechanism, a cleaning mechanism, a support roller and a spraying and flushing mechanism; the device is characterized in that a pair of support frames are arranged and symmetrically fixed on two side walls of a water collecting tank, and guide grooves are formed in the support frames; the adjusting mechanisms are provided with a pair of adjusting mechanisms and are arranged on the corresponding supporting frames, and two ends of the upper drying roller are respectively connected with the corresponding adjusting mechanisms; two ends of the lower drying roller are connected to the support frame through bearings, and one end of the lower drying roller is provided with a motor V; the brush is positioned on the support frame at one side of the lower drying roller; the cleaning mechanisms are provided with a pair of cleaning mechanisms which are symmetrically arranged on the supporting frames above the upper drying rollers; the spraying and flushing mechanism is positioned on one side of the support frame and is fixed at the top end of the water collecting tank; two ends of the supporting roll are connected to the water collecting tank through bearings, and one end of the supporting roll is provided with a motor IV;
the cleaning mechanism comprises a cleaning brush, a motion frame I, a motion frame II, a support plate, a motor I, a movable rod, a connecting rod, a guide rod, a motor II and a movable plate; the supporting plates are provided with a pair of supporting plates which are fixed on the side wall of the supporting frame, the top ends of the supporting plates are provided with a limiting groove I and a limiting groove II, and the limiting groove I is positioned on one side of the limiting groove II; the moving frame I and the moving frame II are symmetrically connected in a limiting groove I at the top end of the supporting plate, a rack I is arranged at the upper end of the moving frame I, and a rack II is arranged at the lower end of the moving frame II; the bottom end of the moving plate is positioned in the limiting groove II, and two ends of the guide rod are fixed on the corresponding moving plate; the cleaning brush is positioned on the guide rod, and one side of the cleaning brush provided with the brush is in arc contact with the outer side wall of the upper drying roller; the motor I is provided with a pair of moving rods which are respectively fixed on the outer side walls of the moving frame I and the moving frame II, and one end of each moving rod is connected with the output end of the motor I; one end of the connecting rod is connected with the other end of the movable rod, and the other end of the connecting rod is connected to the cleaning brush; the motor II is positioned at the top end of the support frame on one side of the moving frame, and an output shaft of the motor II is provided with a gear; the gear is meshed with the rack I and the rack II.
2. The stainless steel pickling and squeezing device for the broadband sheets as claimed in claim 1, wherein the adjusting mechanism comprises a lead screw, a motor III and a moving plate; two ends of the screw rod are connected to the support frame through bearings, the motor III is located at the top end of the support frame, an output shaft of the motor III is connected with one end of the screw rod, the moving plate is installed in a guide groove of the support frame, and the moving plate is connected with the screw rod through threads; two ends of the upper wringing roller are connected to one end of the movable plate far away from the screw rod through bearings.
3. The stainless steel pickling and squeezing device for the broadband sheets according to claim 1, wherein the spraying and flushing mechanism comprises a connecting pipe, a spraying and flushing pipe, a spray head, a mounting frame and a water pump; the mounting frame is fixed at the top end of the water collecting tank, the spraying and flushing pipe is in a herringbone shape, a plurality of spray heads are arranged on the spraying and flushing pipe, and one end of the spraying and flushing pipe is connected to the mounting frame; one end of the water pump is connected to the water collecting tank, one end of the connecting pipe is connected to the water pump, the other end of the connecting pipe is connected with the spraying and flushing pipe, and a filter screen is arranged at one end, located in the water collecting tank, of the connecting pipe; the clean water enters the spraying and washing pipe through the connecting pipe and then is sprayed out through the spray head on the spraying and washing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222901269.XU CN218779032U (en) | 2022-11-01 | 2022-11-01 | Broadband sheet stainless steel pickling and squeezing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222901269.XU CN218779032U (en) | 2022-11-01 | 2022-11-01 | Broadband sheet stainless steel pickling and squeezing device |
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| Publication Number | Publication Date |
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| CN218779032U true CN218779032U (en) | 2023-03-31 |
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|---|---|---|---|
| CN202222901269.XU Active CN218779032U (en) | 2022-11-01 | 2022-11-01 | Broadband sheet stainless steel pickling and squeezing device |
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| Country | Link |
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| CN (1) | CN218779032U (en) |
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- 2022-11-01 CN CN202222901269.XU patent/CN218779032U/en active Active
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