Double-sided coating device for corrosion prevention of steel belt

Abstract

The double-sided coating device is applied to the technical field of fluid coating and is characterized in that a pair of coating plates which are detachably connected and provided with auxiliary coating frames are arranged, during use, the outer end of a base plate is surrounded by the pair of coating plates, and the pair of auxiliary coating frames are located on the upper side and the lower side of the base plate correspondingly; on the basis of traction movement of the base plate, the coating plate is combined to move bidirectionally at the speed higher than the movement speed of the base plate, secondary coating and leveling processes on the surface of the base plate can be achieved, and the first means for improving the coating effect of the base plate is achieved. On the other hand, movement of the base plate can drive a pair of auxiliary coating frames to continuously rotate by 360 degrees, and the coating effect of the base plate is improved. On the basis of improving the fluidity of the coating, the coating in the auxiliary coating frame is sprayed out to the surface of the substrate, air gaps are not prone to being generated on the surface of the substrate under the dual action, blind-spot-free coating of the coating on the substrate is achieved, and the method is a second means for improving the coating effect of the substrate.

Description

Technical Field

[0001] The present application relates to the technical field of fluid coating, and in particular to a double-sided coating device for anti-corrosion of steel strips. Background Art

[0002] Steel belt refers to a conveyor belt made of carbon steel that is used as the traction and carrying component of a belt conveyor. It can also be used to bundle goods. It is a narrow and long steel plate produced by various steel rolling companies to meet the needs of industrial production of various metal or mechanical products in different industrial sectors.

[0003] Steel is easy to rust in air and water, while the corrosion rate of zinc in the atmosphere is only 1 / 15 of that of steel in the atmosphere. Therefore, a fine galvanized layer is often used to protect the steel strip. The galvanized steel strip is processed by ordinary steel strip pickling, galvanizing, packaging and other processes, and has good corrosion resistance. However, if the surface of the galvanized steel strip is not further treated, the galvanized layer on the surface is easily damaged and the anti-corrosion performance is invalid. Therefore, the galvanized steel strip generally needs to be further treated for corrosion resistance.

[0004] For example, the specification of Chinese patent CN201820045258.7 discloses an oil coating device, including a first positioning roller, a second positioning roller, a first material lifting roller, a second material lifting roller, a first coating roller, and a second coating roller distributed on both sides of the steel strip; the oil coating device has a reasonable structure and is easy to manufacture, which can reduce the frequency and time of replacing the coating rollers, reduce the amount of oil used, and thus reduce costs. The oil coating of the device is uniform and thin, which further enhances the anti-corrosion ability of the galvanized sheet.

[0005] Currently, most of the anti-corrosion treatments for galvanized steel strips are carried out by spraying or rolling. However, since galvanized steel strips are generally long, the spraying point needs to be constantly replaced or multi-point spraying is used. During the coating process, blind spots in spraying and uneven coating of different parts are prone to occur, affecting the overall coating effect of the color-coated coil. When a coating roller is used for traction rolling, insufficient coating is likely to occur due to insufficient coating on the coating roller, or the anti-corrosion layer on the surface of the steel strip may be uneven due to excessive coating. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing steel strip is prone to spraying blind spots and uneven coating at different parts during the anti-corrosion process.

[0007] In order to solve the above problems, the present invention provides a double-sided coating device for steel strip corrosion protection, comprising a pair of coating plates, a plurality of bolts are connected between the pair of coating plates, a material storage tank is provided at one end of the pair of coating plates close to each other, an auxiliary coating rack is rotatably connected inside the material storage tank, the auxiliary coating rack comprises a central axis, a plurality of evenly distributed hollow plates are fixedly connected to the outer end of the central axis, a hollow mesh column is arranged inside the hollow plate, a hollow square tube is fixedly connected to one end of the hollow mesh column away from the central axis, the hollow square tube slides through the hollow plate and extends to the outside thereof, an actuating rod is fixedly connected to one end of the hollow square tube away from the hollow mesh column, a magnetic rod is fixedly connected to the inside of the central axis, and a magnetic sheet is fixedly connected to the inner wall of the hollow mesh column;

[0008] The method for using the double-sided coating device for steel strip corrosion protection comprises the following steps:

[0009] S1. Place a pair of coating plates opposite to each other, connect a pair of material storage tanks to form a coating chamber, clamp the substrate to be processed between the upper and lower coating plates, connect one end of the substrate to a traction device, and fix the coating plates by bolts;

[0010] S2, injecting a sufficient amount of paint into the paint chamber composed of a pair of material storage tanks, and then starting the traction device to drive the substrate to move, so that the paint is fully coated on the upper and lower surfaces and both sides of the substrate;

[0011] S3, while the substrate is moving, the upper coating plate is connected to the suspension device, and the suspension device drives a pair of coating plates to move back and forth along the surface of the substrate in both directions, and the movement speed of the coating plates is greater than the movement speed of the substrate, so that the surface of the substrate can be subjected to a secondary coating process;

[0012] S4. During the movement of the substrate, the substrate will contact and squeeze the driving rod. Under the action of the friction between the two, the substrate drives the driving rod to achieve continuous 360° rotation of the auxiliary coating rack. On the one hand, it improves the fluidity of the paint in the paint cavity, and on the other hand, it makes the paint in the auxiliary coating rack spray onto the surface of the substrate, which improves the coating effect in a dual way.

[0013] As a further supplement to the present application, the magnetic poles of the magnetic bar are distributed laterally, and the magnetic poles of the magnetic sheet close to one end of the magnetic bar are the same as the magnetic poles on the outer side of the magnetic bar.

[0014] As a further supplement to the present application, a pair of rotating grooves are opened on the inner wall of the storage tank, and the two ends of the central axis are rotatably connected to the inside of the pair of rotating grooves respectively.

[0015] As a further supplement to the present application, the driving rod includes a hollow mesh rod fixedly connected to the hollow square tube, and a rubber layer is fixedly connected to the outer surface of the hollow mesh rod.

[0016] As a further supplement to the present application, a plurality of evenly distributed coating holes are provided on the rubber layer, and the coating holes are located on a side of the rubber layer away from the hollow square tube.

[0017] As a further supplement to the present application, a through hole is opened on the hollow plate, the hollow square tube is slidably connected to the inside of the through hole, and the outer circle diameter of the hollow mesh column is larger than the aperture of the through hole.

[0018] As a further supplement to the present application, a pair of scrapers are fixedly connected to one end of a pair of coating plates close to each other, and the pair of scrapers are respectively located on both sides of the material storage tank.

[0019] As a further supplement to the present application, a feed pipe is fixedly connected to the outer end of the coating plate, the feed pipe runs through the interior of the coating plate and communicates with the storage tank, and a pipe cover is threadedly connected to the outer end of the feed pipe.

[0020] As a further supplement to the present application, a plurality of evenly distributed mounting holes are provided on the coating plate, and the bolts are threadedly connected between a pair of mounting holes.

[0021] Compared with the prior art, the advantages of this application are:

[0022] (1) The present application provides a pair of detachably connected coating plates with auxiliary coating racks. When in use, the pair of coating plates surround the outer end of the substrate, and the pair of auxiliary coating racks are respectively located on the upper and lower sides of the substrate. On the one hand, based on the traction movement of the substrate, the coating plates are combined with the bidirectional movement at a speed greater than the movement rate of the substrate to achieve secondary coating and leveling of the substrate surface. This is the first means to improve the coating effect of the substrate. On the other hand, the movement of the substrate will drive the pair of auxiliary coating racks to continuously rotate 360°. On the basis of improving the fluidity of the coating, the coating inside the auxiliary coating racks is sprayed onto the surface of the substrate. Under the dual effects, it is not easy to generate air gaps on the surface of the substrate, thereby achieving blind-spot coating of the coating on the substrate. This is the second means to improve the coating effect of the substrate.

[0023] (2) When the driving rod is subjected to external extrusion force, the hollow square tube can be urged to move along the through hole into the interior of the hollow plate. The hollow square tube occupies the internal space of the hollow plate, so that the paint inside the hollow plate passes through the hollow mesh column, the hollow square tube and the rubber layer in turn, and finally flows out through the paint hole and impacts the substrate in contact with the driving rod, so that the paint is fully coated on the substrate, and it is not easy to have a bubble blind spot.

[0024] (3) When the substrate and the coating plate move in the same direction, within the same time, the displacement of the coating plate is greater than the displacement of the substrate, and the substrate moves to the right relative to the coating plate. Therefore, the scraper on the right will perform a leveling process on the surface of the substrate with coating. Subsequently, the traction direction of the substrate remains unchanged, and the coating plate moves in opposite directions to the substrate, that is, the substrate moves to the left and the coating plate moves to the right. The leveled surface of the substrate enters the storage tank again and undergoes the coating process again. Subsequently, it moves to the left through the leveling effect of the scraper on the left. Therefore, through the above process, the substrate surface can undergo a second deep coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional diagram before installation for this application;

[0026] Figure 2 A three-dimensional cross-sectional view of the present application;

[0027] Figure 3 A three-dimensional diagram after installation for this application;

[0028] Figure 4 This is a schematic diagram of the front structure of the present application when in use;

[0029] Figure 5 This is a schematic diagram of the front structure of the auxiliary coating rack of the present application;

[0030] Figure 6 It is a partial front structural schematic diagram of the auxiliary coating rack of the present application;

[0031] Figure 7 This is a schematic diagram of the front structure of the auxiliary coating rack of the present application when it is under pressure;

[0032] Figure 8 This is a front structural schematic diagram of the auxiliary coating rack of the present application when it is driven by the substrate;

[0033] Fig. 9 for Figure 8 The structural diagram at A in the middle;

[0034] Fig.10 This is a schematic diagram of the top structure of this application.

[0035] Description of the numbers in the figure:

[0036] 1 coating plate, 101 material storage tank, 102 mounting hole, 103 rotating tank, 2 scraper, 3 bolts, 4 auxiliary coating rack, 41 central axis, 42 hollow plate, 43 hollow mesh column, 44 hollow square tube, 45 driving rod, 4501 hollow mesh rod, 4502 rubber layer, 4503 coating hole, 46 magnetic rod, 5 feeding pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0038] Example:

[0039] See also Figure 1 , Figure 2 and Figure 3 The present application discloses a double-sided coating device for steel strip corrosion protection, including a pair of coating plates 1, a plurality of bolts 3 are connected between the pair of coating plates 1, a storage trough 101 is provided at one end of the pair of coating plates 1 close to each other, and an auxiliary coating rack 4 is rotatably connected inside the storage trough 101.

[0040] See also Figure 5 The auxiliary coating rack 4 includes a central axis 41, and a plurality of evenly distributed hollow plates 42 are fixedly connected to the outer end of the central axis 41. A hollow mesh column 43 is arranged inside the hollow plate 42. A hollow square tube 44 is fixedly connected to one end of the hollow mesh column 43 away from the central axis 41. The hollow square tube 44 slides through the hollow plate 42 and extends to the outside thereof. An actuating rod 45 is fixedly connected to one end of the hollow square tube 44 away from the hollow mesh column 43, and a magnetic rod 46 is fixedly connected to the inside of the central axis 41.

[0041] A magnetic sheet (not shown) is fixedly connected to the inner wall of the hollow mesh column 43, and the magnetic poles of the magnetic rod 46 are distributed laterally. The magnetic poles of the magnetic sheet close to one end of the magnetic rod 46 are the same as the outer magnetic poles of the magnetic rod 46, that is, there is a mutually repulsive magnetic force between the magnetic sheet and the magnetic rod 46. When not affected by other external forces, the hollow mesh column 43 is located at the end of the hollow plate 42 away from the central axis 41. A through hole is opened on the hollow plate 42, and the hollow square tube 44 is slidably connected to the inside of the through hole. The outer ring diameter of the hollow mesh column 43 is larger than the aperture of the through hole. When the driving rod 45 is subjected to external extrusion force, the hollow square tube 44 can be urged to move along the through hole toward the direction close to the central axis 41. When the external extrusion force disappears, the hollow mesh column 43 and the hollow square tube 44 are pushed outward under the mutual repulsion between the magnetic sheet and the magnetic rod 46.

[0042] See also Figure 6The driving rod 45 includes a hollow mesh rod 4501 fixedly connected to the hollow square tube 44, and a rubber layer 4502 is fixedly connected to the outer surface of the hollow mesh rod 4501. The rubber layer 4502 is provided with a plurality of uniformly distributed paint holes 4503. The paint holes 4503 are located on the side of the rubber layer 4502 away from the hollow square tube 44. The hollow mesh column 43 and the rubber layer 4502 are interconnected through the hollow square tube 44. When the paint is filled in the storage tank 101, the paint enters the rubber layer 4502 through the paint holes 4503. 2, and then enters the hollow plate 42 through the hollow square tube 44 and the hollow mesh column 43 in sequence. When the hollow square tube 44 moves along the through hole into the hollow plate 42, the hollow square tube 44 occupies the internal space of the hollow plate 42, causing the paint inside the hollow plate 42 to pass through the hollow mesh column 43, the hollow square tube 44 and the rubber layer 4502 in sequence, and finally flow out through the paint hole 4503 to impact on the substrate in contact with the induction rod 45, so that the paint is fully coated on the substrate, and it is not easy to have a bubble blind spot.

[0043] See also Fig.10 A pair of rotating grooves 103 are provided on the inner wall of the material storage tank 101, and the two ends of the central axis 41 are rotatably connected to the inside of the pair of rotating grooves 103 respectively. Through the mutual cooperation between the rotating grooves 103 and the central axis 41, the auxiliary coating rack 4 can rotate 360° inside the material storage tank 101.

[0044] See also Figure 4 A pair of scrapers 2 are fixedly connected to the ends of a pair of coating plates 1 close to each other. The pair of scrapers 2 are respectively located on both sides of the storage tank 101. The scrapers 2 level the paint on the substrate, remove excess paint on the substrate surface, and form a paint coating on the substrate surface.

[0045] See also Figure 1 The outer end of the coating plate 1 is fixedly connected with a feed pipe 5, which passes through the interior of the coating plate 1 and communicates with the storage tank 101. The outer end of the feed pipe 5 is threadedly connected with a pipe cover, and the feed pipe 5 is used to inject coating into the storage tank 101. Please refer to Figure 1 and Figure 2 A plurality of evenly distributed mounting holes 102 are provided on the coating plate 1, and the bolt 3 is threadedly connected between a pair of mounting holes 102, that is, a detachable connection is adopted between the pair of coating plates 1, which can facilitate the introduction of the substrate.

[0046] A method for using a double-sided coating device for steel strip corrosion protection comprises the following steps:

[0047] S1. Place a pair of coating plates 1 opposite to each other, a pair of material storage tanks 101 are connected to each other to form a coating chamber, the substrate to be processed is clamped between the upper and lower pair of coating plates 1, and one end of each substrate is connected to a traction device, and the pair of coating plates 1 are connected and fixed by bolts 3, as shown in FIG. Figure 1 As shown;

[0048] S2, injecting a sufficient amount of paint into the paint chamber formed by a pair of material storage tanks 101, and then starting the traction device to drive the substrate to move, so that the paint is fully coated on the upper and lower surfaces and both sides of the substrate;

[0049] S3, such as Figure 4 As shown, while the substrate is moving, the upper coating plate 1 is connected to the suspension device (the suspension device is represented by n in the figure, such as a vacuum suction cup device, which drives the coating plate 1 to move by vacuum adsorption), and the suspension device drives a pair of coating plates 1 to move back and forth along the surface of the substrate, and the movement speed of the coating plate 1 is greater than the movement speed of the substrate, so that the surface of the substrate can be subjected to a secondary coating process;

[0050] On the basis of substrate movement, the coating plate 1 is combined with bidirectional movement, and the movement speed of the coating plate 1 is made greater than the movement speed of the substrate, so that the substrate surface can receive the secondary leveling effect of the scraper 2, such as: please refer to Figure 4 , when the substrate and the coating plate 1 move in the same direction (to the left), within the same time, the displacement of the coating plate 1 is greater than the displacement of the substrate, and the substrate is in a state of moving to the right relative to the coating plate 1, so the scraper 2 on the right side will perform a leveling process on the surface of the substrate with the coating, and then, the traction direction of the substrate remains unchanged, and the coating plate 1 and the substrate move in opposite directions, that is, the substrate moves to the left, and the coating plate 1 moves to the right, and the leveled substrate surface enters the storage tank 101 again, and the coating process is performed again, and then it moves out to the left through the leveling effect of the scraper 2 on the left side. Therefore, through the above process, the substrate surface can be subjected to a secondary deep coating process, which is the first means to improve the coating effect of the substrate;

[0051] S4. During the movement of the substrate, the substrate will contact and squeeze the driving rod 45. Under the action of the friction between the two, the substrate drives the driving rod 45 to achieve continuous 360° rotation of the auxiliary coating rack 4. On the one hand, the fluidity of the paint in the paint cavity is improved, and on the other hand, the paint in the auxiliary coating rack 4 is sprayed onto the surface of the substrate, thereby improving the coating effect in a dual way.

[0052] like Figure 8 and Fig. 9As shown, when the substrate moves in the storage tank 101, the upper and lower surfaces of the substrate are in contact with a pair of auxiliary coating racks 4 respectively. Due to the flexible characteristics of the rubber layer 4502, the substrate will cause extrusion deformation to the rubber layer 4502 and form a certain surface contact extrusion state, thereby increasing the friction between the two, so that the substrate drives the driving rod 45 to rotate in the corresponding direction, effectively increasing the fluidity of the coating, making the coating fully and comprehensively contact with the surface of the substrate, and making it difficult for air gaps to be generated on the surface of the substrate. At the same time, the extrusion force generated by the substrate on the driving rod 45 will push the hollow square tube 44 to move into the hollow plate 42, so that the coating inside the hollow plate 42 is sprayed onto the surface of the substrate through the coating hole 4503, further deeply coating the substrate, thereby doubly improving the coating effect. This is the second means to improve the coating effect of the substrate.

[0053] Also, see Fig.10 The width of the substrate is smaller than the width of the material storage tank 101, so the coating can contact both side ends of the substrate to achieve a comprehensive coating process on the substrate.

[0054] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and its improved conception, which should be covered by the protection scope of the present application.

Claims

1. A double-sided coating device for steel strip corrosion protection, comprising a pair of coating plates (1), characterized in that: A plurality of bolts (3) are connected between a pair of coating plates (1); a material storage trough (101) is provided at one end of the pair of coating plates (1) close to each other; an auxiliary coating rack (4) is rotatably connected inside the material storage trough (101); the auxiliary coating rack (4) comprises a central axis (41); a plurality of evenly distributed hollow plates (42) are fixedly connected to the outer end of the central axis (41); a hollow net column (43) is provided inside the hollow plate (42); an end of the hollow net column (43) away from the central axis (41) is fixedly connected to a hollow square tube (44); the hollow square tube (44) slides through the hollow plate (42) and extends to the outside thereof; an end of the hollow square tube (44) away from the hollow net column (43) is fixedly connected to an actuating rod (45); a magnetic rod (46) is fixedly connected inside the central axis (41); and a magnetic sheet is fixedly connected to the inner wall of the hollow net column (43); The method for using the double-sided coating device for steel strip corrosion protection comprises the following steps: S1. A pair of coating plates (1) are placed opposite to each other up and down, a pair of material storage tanks (101) are connected to each other to form a coating chamber, a substrate to be processed is clamped between the upper and lower pair of coating plates (1), and one end of each substrate is connected to a traction device, and the pair of coating plates (1) are connected and fixed by bolts (3); S2, injecting a sufficient amount of coating into the coating chamber formed by a pair of material storage tanks (101), and then starting the traction device to drive the substrate to move, so that the coating is fully coated on the upper and lower surfaces and both sides of the substrate; S3, while the substrate is moving, the upper coating plate (1) is connected to the suspension device, and the suspension device drives a pair of coating plates (1) to move back and forth along the surface of the substrate in both directions, and the movement speed of the coating plates (1) is greater than the movement speed of the substrate, so that the surface of the substrate can be subjected to a secondary coating process; S4. During the movement of the substrate, the substrate will contact and squeeze the driving rod (45). Under the action of the friction between the two, the substrate drives the driving rod (45) to achieve continuous 360° rotation of the auxiliary coating rack (4). On the one hand, the fluidity of the coating in the coating chamber is improved, and on the other hand, the coating in the auxiliary coating rack (4) is sprayed onto the surface of the substrate, thereby improving the coating effect in a dual effect.

2. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: The magnetic poles of the magnetic bar (46) are distributed in a transverse manner, and the magnetic poles of the magnetic sheet close to one end of the magnetic bar (46) are the same as the outer magnetic poles of the magnetic bar (46).

3. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: A pair of rotating grooves (103) are provided on the inner wall of the material storage tank (101), and the two ends of the central shaft (41) are rotatably connected to the inside of the pair of rotating grooves (103) respectively.

4. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: The driving rod (45) comprises a hollow mesh rod (4501) fixedly connected to the hollow square tube (44), and a rubber layer (4502) is fixedly connected to the outer surface of the hollow mesh rod (4501).

5. A double-sided coating device for steel strip corrosion protection according to claim 4, characterized in that: The rubber layer (4502) is provided with a plurality of evenly distributed coating holes (4503), and the coating holes (4503) are located on a side of the rubber layer (4502) away from the hollow square tube (44).

6. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: The hollow plate (42) is provided with a through hole, the hollow square tube (44) is slidably connected to the inside of the through hole, and the outer diameter of the hollow mesh column (43) is larger than the aperture of the through hole.

7. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: A pair of scrapers (2) are fixedly connected to one end of the pair of coating plates (1) that is close to each other, and the pair of scrapers (2) are respectively located on two sides of the material storage tank (101).

8. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: The outer end of the coating plate (1) is fixedly connected to a feed pipe (5), the feed pipe (5) passes through the interior of the coating plate (1) and communicates with the material storage tank (101), and the outer end of the feed pipe (5) is threadedly connected to a pipe cover.

9. A double-sided coating device for steel strip corrosion protection according to claim 1, characterized in that: The coating plate (1) is provided with a plurality of evenly distributed mounting holes (102), and the bolt (3) is threadedly connected between a pair of mounting holes (102).

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