A roller-type surface passivation treatment device for continuous galvanized strip steel

Abstract

The present invention discloses a roller-type surface passivation treatment device for continuous galvanized steel strip, comprising a workbench, a first guide roller frame located on the left side of the top of the workbench, and a second guide roller frame located on the right side of the top of the workbench. An adjustment unit is provided at the bottom of the workbench to drive the first guide roller frame and the second guide roller frame to move relative to or apart from each other. A passivation liquid tank is fixed in the middle of the top of the workbench. The present invention relates to the field of passivation treatment technology. The roller-type surface passivation treatment device for continuous galvanized steel strip utilizes a first motor to provide power output, and can indirectly realize the relative or separate movement of the first guide roller frame and the second guide roller frame through a first rotating seat, a second rotating seat and a rotating shaft. The steel strip can not only be immersed in the passivation liquid, but also be straightened out of the passivation liquid. The cleaning mechanism then cleans the excess passivation liquid on the surface of the steel strip, which can not only avoid the accumulation of the passivation liquid affecting the subsequent drying quality, but also reduce the drying time and improve the processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of passivation treatment, in particular to a roller-type surface passivation treatment device for continuous galvanized strip steel. Background Art

[0002] Passivation refers to the process of oxidizing a metal with a strong oxidant or electrochemical method, rendering its surface inactive. It is a method of reducing the metal's surface resistance to oxidation and slowing its corrosion rate. Furthermore, passivation is also the phenomenon in which an active metal or alloy is significantly reduced in chemical activity, becoming a precious metal.

[0003] Referring to a Chinese patent, a roller-type surface passivation treatment device for continuous galvanizing of steel strip (publication number: CN213596401U, publication date: 2021-07-02) includes a bottom plate, a first support column, a second support column, a passivation tank and a base are fixedly installed on the top of the bottom plate, a first transmission roller is fixedly installed between the first support columns, and a second transmission roller is fixedly installed between the second support columns. There are two first transmission rollers and two second transmission rollers respectively and they are arranged in a vertical direction;

[0004] The existing continuous galvanized strip steel roller surface passivation treatment still has the following defects:

[0005] 1. When the strip is passivated, it can only be immersed in the passivation solution, and then taken out and the passivation solution is scraped off separately. The separation procedure will make the process cumbersome, and failure to handle it in time will cause the accumulation of passivation solution and affect the subsequent drying quality;

[0006] 2. After the strip is passivated, impurities on the strip fall into the passivation liquid tank. When cleaning, the passivation liquid needs to be discharged for cleaning. The strip needs to be cleaned multiple times during passivation treatment, which increases the burden on the operator. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In view of the deficiencies in the prior art, the present invention provides a roller-type surface passivation treatment device for continuous galvanized strip steel, which solves the problem that in the existing roller-type surface passivation treatment for continuous galvanized strip steel, the strip steel can only be immersed in the passivation liquid, and then the passivation liquid is taken out and scraped off separately. Failure to handle the passivation liquid in time will cause accumulation of the passivation liquid, affecting the subsequent drying quality, and impurities on the strip steel fall into the passivation liquid tank and cannot be handled in time.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a roller-type surface passivation treatment device for continuous galvanized strip steel, comprising a workbench, a first guide roller frame located on the left side of the top of the workbench, and a second guide roller frame located on the right side of the top of the workbench, an adjustment unit is provided at the bottom of the workbench to drive the first guide roller frame and the second guide roller frame to move relative to or apart, a passivation liquid tank is fixed in the middle of the top of the workbench, a discharge unit is provided below the inner wall of the passivation liquid tank and extends to the outside; the adjustment unit includes a cross bar fixed between the two sides of the inner wall of the workbench, a fixed plate is fixed in the middle between the two cross bars, a fixed rotating shaft passes through the fixed plate, and a first motor is fixed at the bottom of the fixed plate. The top of the first motor output shaft is fixed to the bottom end of the rotating shaft through a coupling, and folding frames are provided on both sides above the cross bar, and the bottoms of the two folding frames are fixed with limiting sleeves, and the inner surface of the limiting sleeve slides with the outer surface of the cross bar, and the outer surface of the rotating shaft is fixed with a first rotating seat, and the second rotating seat is rotated on both sides of the top of the first rotating seat, and the bottom of the second rotating seat rotates with the top of the folding frame, and slide grooves are provided on both sides of the top of the workbench, and the top of the folding frame extends to the outside of the slide groove and slides with the inner wall of the slide groove, and the top of the folding frame is respectively fixed to the bottom of the first guide roller frame and the second guide roller frame, and an extension part is integrally formed on the inner side of the top wall of the passivation liquid tank, and a cleaning mechanism is provided on the extension part.

[0011] Preferably, the cleaning mechanism includes a screw rod rotatably arranged on the extension part, one end of the screw rod extends to the outside of the extension part, a second motor is fixed to the side of the extension part, the output end of the second motor is fixed to one end of the screw rod through a coupling, the outer surface of the screw rod is threadedly connected to a threaded seat, and one side of the threaded seat slides with the surface of the extension part.

[0012] Preferably, a vertical groove is provided on the surface of the extension part, and a horizontal groove is provided on the surface of the extension part and is connected to the top of the vertical groove. A sliding seat is provided on the inner surface of the vertical groove. A pressure rod is fixed on one side of the sliding seat, and the pressure rod is divided into two parts, an upper part and an lower part, and a through groove is formed in the middle. The upper part is fixed to the sliding seat, and the lower part is fixed to the upper part by bolts. A protrusion is fixed on the top of the pressure rod, and a groove provided on the bottom of the threaded seat can be adapted to engage with the protrusion.

[0013] Preferably, the discharge unit includes a guide plate fixed below the inner wall of the passivation liquid tank, the guide plate is formed by splicing four plates at an inclined angle, a through hole is passed through the middle of the guide plate, and a blanking hole is passed through the bottom of the passivation liquid tank.

[0014] Preferably, a discharge pipe is fixed at the bottom of the passivation liquid tank and aligned with the discharge hole. A sleeve is provided on the outside of the discharge pipe. A rubber ring is fixed on the upper edge of the outer side of the sleeve, and the top of the rubber ring is in contact with the bottom of the passivation liquid tank. A clamping block is fixed on one side of the discharge pipe.

[0015] Preferably, the inner wall of the sleeve is provided with a limiting groove and an arc groove, and the limiting groove and the arc groove are vertically connected, the clamping block can slide along the limiting groove and the arc groove, and the bottom of the passivation liquid tank is provided with a control mechanism to control the opening and closing of the blanking hole.

[0016] Preferably, the control mechanism includes a baffle sliding on the inner wall of the bottom of the passivation liquid tank, the baffle can block the material from falling out of the material hole, and a support plate is slidably provided on one side of the bottom of the passivation liquid tank.

[0017] Preferably, one side of the support plate is fixed to one side of the baffle, and a connecting plate is fixed to the other side of the bottom of the passivation liquid tank, and the connecting plate and the support plate are fixed by a spring.

[0018] (3) Beneficial effects

[0019] The present invention provides a roller-type surface passivation treatment device for continuous galvanized steel strip. Compared with the prior art, it has the following advantages:

[0020] (1) The roller-type surface passivation treatment device for continuous galvanized strip steel comprises a cross bar fixed between two sides of the inner wall of the workbench on the adjustment unit, a fixed plate is fixed in the middle between the two cross bars, a fixed rotating shaft passes through the fixed plate, a first motor is fixed at the bottom of the fixed plate, the top of the output shaft of the first motor is fixed to the bottom end of the rotating shaft through a coupling, folding frames are provided on both sides above the cross bar, the bottoms of the two folding frames are fixed with limiting sleeves, and the inner surface of the limiting sleeves slides with the outer surface of the cross bar, a first rotating seat is fixed to the outer surface of the rotating shaft, a second rotating seat is rotated on both sides of the top of the first rotating seat, and the bottom of the second rotating seat rotates with the top of the folding frame, and both sides of the top of the workbench are provided with The top of the folding frame extends to the outside of the chute and slides with the inner wall of the chute, and the top of the folding frame is respectively fixed to the bottom of the first guide roller frame and the second guide roller frame. An extension portion is integrally formed on the inner side of the top wall of the passivation liquid tank, and a cleaning mechanism is provided on the extension portion. The first motor is used to provide power output, and the relative or separation movement of the first guide roller frame and the second guide roller frame can be indirectly realized through the first rotating seat, the second rotating seat and the rotating shaft. Not only can the strip steel be immersed in the passivation liquid, but it can also be straightened out of the passivation liquid, and then cooperated with the cleaning mechanism to clean the excess passivation liquid on the surface of the strip steel, which can not only avoid the accumulation of passivation liquid affecting the subsequent drying quality, but also reduce the drying time and improve the processing efficiency.

[0021] (2) The roller-type surface passivation treatment device for continuous galvanized strip steel comprises a guide plate fixed on the lower side of the inner wall of the passivation liquid tank in the discharge unit, the guide plate is formed by splicing four plates at an inclined angle, a through hole is passed through the middle of the guide plate, a drop hole is passed through the bottom of the passivation liquid tank, a drop pipe is fixed at the bottom of the passivation liquid tank and aligned with the drop hole, a sleeve is provided on the outside of the drop pipe, a rubber ring is fixed on the upper edge of the outer side of the sleeve, and the top of the rubber ring contacts the bottom of the passivation liquid tank, a block is fixed on one side of the drop pipe, and the sleeve The inner wall is provided with a limit groove and an arc groove, and the limit groove and the arc groove are vertically connected. The clamping block can slide along the limit groove and the arc groove. The bottom of the passivation liquid tank is provided with a control mechanism to control the opening and closing of the blanking hole. The guide plate is made of four plates at an inclined angle. Impurities detached from the strip enter the through hole and are collected through the sleeve. When they need to be taken out, the opening and closing of the blanking hole is controlled by the control mechanism. With the help of the clamping block, the limit groove and the arc groove, the sleeve can be easily taken out for cleaning, and the passivation liquid will not flow out. The operation is simple and the use is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;

[0023] Figure 2 A first-perspective stereoscopic view of a portion of the adjustment unit of the present invention;

[0024] Figure 3 A second perspective stereoscopic image of a portion of the adjustment unit of the present invention;

[0025] Figure 4 This is a three-dimensional structural exploded view of the cleaning mechanism of the present invention;

[0026] Figure 5 This is a three-dimensional exploded view of the passivation liquid tank of the present invention;

[0027] Figure 6 It is a partial three-dimensional cross-sectional view of the passivation liquid tank of the present invention;

[0028] Figure 7 It is a partial three-dimensional exploded view of the discharge unit of the present invention.

[0029] In the figure, 1-workbench, 2-first guide roller frame, 3-second guide roller frame, 4-adjustment unit, 41-cross bar, 42-fixed plate, 43-rotating shaft, 44-first motor, 45-folding frame, 46-limiting sleeve, 47-first rotating seat, 48-second rotating seat, 49-cleaning mechanism, 49-1-screw, 49-2-second motor, 49-3-threaded seat, 49-4-vertical slot, 49-5-cross slot, 49-6-sliding seat, 49-7-pressing rod , 49-8-bolt, 49-9-bump, 49-10-through groove, 410-slide, 411-extension, 5-passivation liquid tank, 6-discharge unit, 61-guide plate, 62-through hole, 63-dropping hole, 64-dropping pipe, 65-sleeve, 66-rubber ring, 67-block, 68-control mechanism, 68-1-baffle, 68-2-support plate, 68-3-connecting plate, 68-4-spring, 69-limiting groove, 610-arc groove. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-7The embodiment of the present invention provides a technical solution: a roller-type surface passivation treatment device for continuous galvanized strip steel, comprising a workbench 1, a first guide roller frame 2 located on the left side of the top of the workbench 1, and a second guide roller frame 3 located on the right side of the top of the workbench 1. The first guide roller frame 2 and the second guide roller frame 3 are conventional technologies for strip steel conveying. An adjustment unit 4 is provided at the bottom of the workbench 1 to drive the first guide roller frame 2 and the second guide roller frame 3 to move relative to or apart from each other. A passivation liquid tank 5 is fixed in the middle of the top of the workbench 1. The interior of the passivation liquid tank 5 is provided with passivation liquid, and the inner wall of the passivation liquid tank 5 is provided with a passivation liquid. A discharge unit 6 is provided below and extending to the outside; the adjustment unit 4 includes a cross bar 41 fixed between the two sides of the inner wall of the workbench 1, a fixed plate 42 is fixed in the middle between the two cross bars 41, a fixed rotating shaft 43 passes through the fixed plate 42, and a first motor 44 is fixed to the bottom of the fixed plate 42. The first motor 44 is a three-phase asynchronous motor, which is electrically connected to the external power supply. The top end of the output shaft of the first motor 44 is fixed to the bottom end of the rotating shaft 43 through a coupling. Folding frames 45 are provided on both sides above the cross bar 41, and the bottoms of the two folding frames 45 are fixed with limiting sleeves 46, and the inner surface of the limit sleeve 46 slides with the outer surface of the cross bar 41, the outer surface of the rotating shaft 43 is fixed with a first rotating seat 47, and the second rotating seat 48 is rotated on both sides of the top of the first rotating seat 47, and the bottom of the second rotating seat 48 rotates with the top of the folding frame 45. A slide groove 410 is opened on both sides of the top of the workbench 1, and the top of the folding frame 45 extends to the outside of the slide groove 410 and slides with the inner wall of the slide groove 410, and the top of the folding frame 45 is fixed to the bottom of the first guide roller frame 2 and the second guide roller frame 3 respectively, and the inner side of the top wall of the passivation liquid tank 5 is integrated. The shape has an extension portion 411, and a cleaning mechanism 49 is provided on the extension portion 411. The first motor 44 is used to provide power output. The relative or separation movement of the first guide roller frame 2 and the second guide roller frame 3 can be indirectly realized through the first rotating seat 47, the second rotating seat 48 and the rotating shaft 43. Not only can the strip be immersed in the passivation liquid, but it can also be straightened out of the passivation liquid. The cleaning mechanism 49 is then used to clean the excess passivation liquid on the surface of the strip, which can not only avoid the accumulation of the passivation liquid affecting the subsequent drying quality, but also reduce the drying time and improve the processing efficiency.

[0032] In the embodiment of the present invention, the cleaning mechanism 49 includes a screw rod 49-1 rotatably arranged on the extension portion 411, one end of the screw rod 49-1 extends to the outside of the extension portion 411, and a second motor 49-2 is fixed to the side of the extension portion 411. The second motor 49-2 is a three-phase asynchronous motor and is electrically connected to an external power supply. The output end of the second motor 49-2 is fixed to one end of the screw rod 49-1 through a coupling. The outer surface of the screw rod 49-1 is threadedly connected to a threaded seat 49-3, and one side of the threaded seat 49-3 slides with the surface of the extension portion 411. A vertical groove 49-4 is provided on the surface of the extension portion 411. 1 and is connected to the top of the vertical groove 49-4 with a horizontal groove 49-5. A sliding seat 49-6 is slid on the inner surface of the vertical groove 49-4. A pressure rod 49-7 is fixed to one side of the sliding seat 49-6. The pressure rod 49-7 is made of metal material and its mass is sufficient to press down the strip steel. The pressure rod 49-7 is divided into two parts, an upper and a lower parts, and a through groove 49-10 is formed in the middle of the upper and lower parts. The upper part is fixed to the sliding seat 49-6, and the lower part is fixed to the upper part by a bolt 49-8. A protrusion 49-9 is fixed to the top of the pressure rod 49-7, and the groove provided at the bottom of the threaded seat 49-3 can be adapted to be snapped into the protrusion 49-9.

[0033] In the embodiment of the present invention, the discharge unit 6 includes a guide plate 61 fixed to the lower inner wall of the passivation liquid tank 5. The guide plate 61 is made of four plates with an inclined angle. The inclination angle can be set according to the needs, for example, 15 degrees. A through hole 62 is passed through the middle of the guide plate 61. A drop hole 63 is passed through the bottom of the passivation liquid tank 5. A drop pipe 64 is fixed at the bottom of the passivation liquid tank 5 and is aligned with the drop hole 63 and connected to it. A sleeve 65 is provided on the outside of the drop pipe 64. The sleeve 65 is provided on the outside of the sleeve 65. 5 is fixed with a rubber ring 66 on the upper edge of the outer side. The rubber ring 66 is elastic and can make the sleeve 65 fit tightly with the bottom of the passivation liquid tank 5. The top of the rubber ring 66 contacts the bottom of the passivation liquid tank 5. A clamping block 67 is fixed on one side of the feed pipe 64. A limiting groove 69 and an arc groove 610 are provided on the inner wall of the sleeve 65. The limiting groove 69 and the arc groove 610 are vertically connected. The clamping block 67 can slide along the limiting groove 69 and the arc groove 610. The passivation liquid tank 5 The bottom of the passivation liquid tank 5 is provided with a control mechanism 68 to control the opening and closing of the drop hole 63. The control mechanism 68 includes a baffle 68-1 sliding in the inner wall of the bottom of the passivation liquid tank 5. The baffle 68-1 can block the drop hole 63 from dropping. A support plate 68-2 slides on one side of the bottom of the passivation liquid tank 5. One side of the support plate 68-2 is fixed to one side of the baffle 68-1. A connecting plate 68-3 is fixed to the other side of the bottom of the passivation liquid tank 5, and a spring is provided between the connecting plate 68-3 and the support plate 68-2. 68-4 is fixed, and the elastic coefficient of the spring 68-4 can be set according to the needs. The guide plate 61 is spliced ​​with four plates at an inclined angle. The impurities separated from the strip enter the through hole 62 and are collected by the sleeve 65. When they need to be taken out, the opening and closing of the blanking hole 63 is controlled by the control mechanism 68. In conjunction with the block 67, the limit groove 69 and the arc groove 610, the sleeve 65 can be easily taken out for cleaning, and the passivation liquid will not flow out. The operation is simple and the use is convenient.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] When in use, first place the pressure rod 49-7 in the passivation liquid tank 5, and the strip passes through the first guide roller frame 2, the through slot 49-10 on the pressure rod 49-7 and the second guide roller frame 3, and then use the passivation liquid in the passivation liquid tank 5 to passivate the strip. After standing for a period of time, start the first motor 44, and the first motor 44 drives the rotating shaft 43 to rotate. The rotation of the rotating shaft 43 further drives the first rotating seat 47 to rotate. The first rotating seat 47 rotates and then drives the second rotating seat 48 to rotate. The rotation of the second rotating seat 48 causes the two folding frames 45 to move to both sides. At the same time, the limit sleeve 46 slides to both sides on the cross bar 41, and the two folding frames 45 move to both sides so that the first guide roller frame 2 and the second guide roller The frame 3 moves to both sides, and the strip steel is straightened at this time, synchronously driving the pressure rod 49-7 to move upward in the vertical slot 49-4, and the pressure rod 49-7 moves upward until the horizontal slot 49-5, and the upward movement of the pressure rod 49-7 drives the protrusion 49-9 to move upward until the protrusion 49-9 moves upward and pushes into the groove at the bottom of the threaded seat 49-3. At this time, the second motor 49-2 is started, and the second motor 49-2 drives the screw rod 49-1 to rotate, and the rotation of the screw rod 49-1 drives the threaded seat 49-3 to move to one side, and the threaded seat 49-3 moves to one side and then drives the protrusion 49-9 to move to one side. The provided bolt 49-8 can also adjust the spacing according to the thickness of the strip steel. At this time, the pressure rod 49-7 moves left and right to scrape off the excess passivation liquid on the strip, and after completion, it is transported, and the above operation can be repeated for the next section of strip. After passivation, the impurities on the strip enter the through hole 62 by virtue of the inclined characteristics of the guide plate 61, and the impurities entering the through hole 62 enter the blanking hole 63. The impurities entering the blanking hole 63 fall into the discharge pipe 64 and are finally deposited in the sleeve 65 after passing through the discharge pipe 64. When the impurities in the sleeve 65 need to be removed for cleaning, it is only necessary to push the support plate 68-2. The support plate 68-2 moves to one side, driving the baffle 68-1 to move to one side. The baffle 68-1 moves to one side to block the blanking hole 63. At this time, the spring 68-4 is in Stretch state, then rotate the sleeve 65, use the rotation of the sleeve 65 to make the block 67 and the arc groove 610 move relative to each other, until the position of the limit groove 69 is aligned with the block 67, then the sleeve 65 can be pulled down to take out, and the sleeve 65 can be restored to its original state after cleaning. At this time, loosen the branch plate 68-2, and restore the original state under the action of the spring 68-4. This can not only avoid the accumulation of passivation liquid affecting the subsequent drying quality, but also reduce the drying time and improve the processing efficiency. The sleeve 65 can be easily taken out for cleaning, and the passivation liquid will not flow out. The operation is simple and easy to use. The above is the working principle of a roller surface passivation treatment device for continuous galvanized strip steel.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A roller-type surface passivation treatment device for continuous galvanized strip steel, comprising a workbench (1), a first guide roller frame (2) located on the left side of the top of the workbench (1), and a second guide roller frame (3) located on the right side of the top of the workbench (1), characterized in that: An adjustment unit (4) is provided at the bottom of the workbench (1) to drive the first guide roller frame (2) and the second guide roller frame (3) to move relative to or away from each other; a passivation liquid tank (5) is fixed in the middle of the top of the workbench (1); a discharge unit (6) is provided below the inner wall of the passivation liquid tank (5) and extends to the outside; The adjustment unit (4) includes a cross bar (41) fixed between two sides of the inner wall of the workbench (1), a fixed plate (42) is fixed in the middle between the two cross bars (41), a fixed rotating shaft (43) passes through the fixed plate (42), a first motor (44) is fixed at the bottom of the fixed plate (42), the top end of the output shaft of the first motor (44) is fixed to the bottom end of the rotating shaft (43) through a coupling, folding frames (45) are provided on both sides above the cross bar (41), and the bottoms of the two folding frames (45) are fixed with a limiting sleeve (46), and the inner surface of the limiting sleeve (46) slides with the outer surface of the cross bar (41), and the rotating shaft (43) A first rotating seat (47) is fixed to the outer surface of the workbench (1), and second rotating seats (48) are rotated on both sides of the top of the first rotating seat (47), and the bottom of the second rotating seat (48) rotates with the top of the folding frame (45), and a slide groove (410) is opened on both sides of the top of the workbench (1), and the top of the folding frame (45) extends to the outside of the slide groove (410) and slides with the inner wall of the slide groove (410), and the top of the folding frame (45) is respectively fixed to the bottom of the first guide roller frame (2) and the second guide roller frame (3), and an extension part (411) is integrally formed on the inner side of the top wall of the passivation liquid tank (5), and a cleaning mechanism (49) is provided on the extension part (411); The cleaning mechanism (49) comprises a screw rod (49-1) rotatably arranged on the extension portion (411), one end of the screw rod (49-1) extends to the outside of the extension portion (411), a second motor (49-2) is fixed to the side of the extension portion (411), the output end of the second motor (49-2) is fixed to one end of the screw rod (49-1) through a coupling, and the outer surface of the screw rod (49-1) is threadedly connected to a threaded seat (49-3), and one side of the threaded seat (49-3) slides on the surface of the extension portion (411).

2. The roller-type surface passivation treatment device for continuous galvanized strip steel according to claim 1, characterized in that: A vertical groove (49-4) is provided on the surface of the extension portion (411), and a horizontal groove (49-5) is provided on the surface of the extension portion (411) and is connected to the top end of the vertical groove (49-4). A sliding seat (49-6) is slidably provided on the inner surface of the vertical groove (49-4), and a pressure rod (49-7) is fixed on one side of the sliding seat (49-6). The pressure rod (49-7) is divided into an upper and a lower part, and a through groove (49-10) is formed in the middle of the upper and lower parts. The upper part is fixed to the sliding seat (49-6), and the lower part is fixed to the upper part by a bolt (49-8). A protrusion (49-9) is fixed on the top of the pressure rod (49-7), and a groove provided on the bottom of the threaded seat (49-3) can be adapted to be snap-fitted with the protrusion (49-9).

3. The roller-type surface passivation treatment device for continuous galvanized strip steel according to claim 1, characterized in that: The discharge unit (6) comprises a guide plate (61) fixed below the inner wall of the passivation liquid tank (5); the guide plate (61) is formed by splicing four plates at an inclined angle; a through hole (62) is passed through the middle of the guide plate (61); and a drop hole (63) is passed through the bottom of the passivation liquid tank (5).

4. The roller-type surface passivation treatment device for continuous galvanized strip steel according to claim 3, characterized in that: A feeding pipe (64) is fixed at the bottom of the passivation liquid tank (5) and aligned with the feeding hole (63). A sleeve (65) is provided on the outside of the feeding pipe (64). A rubber ring (66) is fixed on the upper edge of the outer side of the sleeve (65), and the top of the rubber ring (66) contacts the bottom of the passivation liquid tank (5). A clamping block (67) is fixed on one side of the feeding pipe (64).

5. The roller-type surface passivation treatment device for continuous galvanized steel strip according to claim 4, characterized in that: The inner wall of the sleeve (65) is provided with a limiting groove (69) and an arc groove (610), and the limiting groove (69) and the arc groove (610) are vertically connected. The clamping block (67) can slide along the limiting groove (69) and the arc groove (610). The bottom of the passivation liquid tank (5) is provided with a control mechanism (68) to control the opening and closing of the blanking hole (63).

6. The roller-type surface passivation treatment device for continuous galvanized steel strip according to claim 5, characterized in that: The control mechanism (68) includes a baffle (68-1) sliding on the inner wall of the bottom of the passivation liquid tank (5), and the baffle (68-1) can block the material from falling from the material drop hole (63). A support plate (68-2) slides on one side of the bottom of the passivation liquid tank (5).

7. The roller-type surface passivation treatment device for continuous galvanized steel strip according to claim 6, characterized in that: One side of the support plate (68-2) is fixed to one side of the baffle (68-1), and a connecting plate (68-3) is fixed to the other side of the bottom of the passivation liquid tank (5), and the connecting plate (68-3) and the support plate (68-2) are fixed via a spring (68-4).

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