Steel roller coating device

Abstract

The invention relates to the technical field of coatings in the metallurgical industry, in particular to a steel roller coating device. According to the technical scheme, the coating device comprises a solution tank and a coating roller assembly, the coating roller assembly comprises an upper coating roller and a lower coating roller, the upper coating roller and the lower coating roller are oppositely arranged in the vertical direction, a sub-tank is arranged in the solution tank, the sub-tank is provided with an opening and is communicated with the solution tank, the lower coating roller is located in the sub-tank, and the upper coating roller and the lower coating roller are oppositely arranged in the vertical direction. And a runner structure capable of buffering and guiding the coating liquid in the solution tank to the sub-tank is also arranged at the communication part of the sub-tank and the solution tank. According to the lower coating roller, violent stirring of coating liquid in the main liquid area during rotation of the lower coating roller is effectively inhibited, the phenomenon of coating liquid fluctuation (rippling) is relieved or avoided from the source, the uniformity and stability of a coating liquid film on the surface of the lower coating roller are remarkably improved, so that the coating uniformity of a coating on the surface of a steel product is guaranteed, splashing of the coating liquid caused by fluctuation is effectively reduced, and the service life of the coating liquid is prolonged. And coating liquid waste and equipment pollution are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating in the metallurgical industry, and in particular to a steel roller coating device. BACKGROUND

[0002] In the metallurgical industry, the surface of steel such as silicon steel needs to be coated with a specific coating such as magnesium oxide solution or chromium oxide solution to achieve key functions such as protection, insulation, and bonding. The coating process for such coatings has been relatively mature in the production line of steel plants, but in the laboratory stage before mass production, a large number of tests are still needed to verify the rationality of the coating formula and coating parameters, and this process requires small-batch coating of silicon steel samples.

[0003] Currently, silicon steel coating in the laboratory stage relies on manual operation, which has obvious defects: on the one hand, manual coating is extremely inefficient and cannot meet the sample quantity requirements of the test; on the other hand, the force and speed of manual operation are difficult to control accurately, resulting in uneven coating thickness, poor surface flatness, and insufficient coating quality stability, which directly affects the accuracy of test data; at the same time, coating liquid is wasted during manual coating, which not only increases the cost of the test, but also may cause environmental pollution due to the dripping of the coating liquid.

[0004] To solve the defects of manual coating, some mechanical coating schemes have appeared in the prior art, for example, the "non-oriented silicon steel coating spraying device" disclosed in the patent application No. 202320779224.1 (authorized announcement No. CN220111456U), which adds a pre-spraying head above the upper coating roller and sets a coating liquid collecting groove below, thereby prolonging the wetting time of the coating liquid on the upper and lower coating rollers and improving the uniformity of the environmentally friendly coating to a certain extent.

[0005] For example, the "magnesium oxide roller coating and feeding device for the surface of silicon steel" disclosed in the Chinese patent application No. 202321716448.4 (authorized announcement No. CN220195331U) uses a delivery pump and a nozzle to realize the flow circulation of the magnesium oxide solution, which not only avoids precipitation of the solution, but also ensures the coating amount of magnesium oxide on the surface of silicon steel by controlling the liquid amount of the nozzle, thereby ensuring product quality.

[0006] However, the above two types of existing mechanical coating devices still have common problems: the coating rollers located below need to be partially immersed in the coating liquid, and when the coating rollers rotate, the coating liquid in the collecting groove or solution groove will produce a large fluctuation (i.e. the coating liquid splashes phenomenon). This fluctuation will on the one hand cause the coating liquid on the surface of the coating roller to be unstable, thereby affecting the uniformity of the coating on the surface of the silicon steel, and on the other hand, the fluctuating coating liquid is easy to splash outside the collecting groove or solution groove, causing waste of coating liquid, equipment pollution, and even affecting the cleanliness and safety of the laboratory test environment.

[0007] In summary, how to solve the problem of uneven coating and splashing caused by coating liquid fluctuation on the basis of retaining the advantages of mechanical coating efficiency and stability, and meet the precise coating demand of silicon steel production test, has become a technical problem that the technical personnel in the field urgently need to solve. SUMMARY

[0008] The first technical problem to be solved by the present application is to provide a steel material roller coating device that can effectively suppress coating liquid fluctuation from the source, improve coating uniformity and reduce coating liquid waste.

[0009] The second technical problem to be solved by the present application is to provide a steel material roller coating device that can achieve rapid adaptation to different thickness of steel materials and stable pressing to improve operation efficiency and coating quality.

[0010] The third technical problem to be solved by the present application is to provide a steel material roller coating device that can provide smooth transition for coated steel materials by setting auxiliary rollers and adjustable porting devices, and can flexibly adjust the size of the porting according to the thickness of the plate.

[0011] The technical solution adopted by the present application to solve the first technical problem is a steel material roller coating device, comprising a solution tank and a coating roller assembly, the coating roller assembly comprising an upper coating roller and a lower coating roller, the upper coating roller and the lower coating roller being arranged opposite to each other in the vertical direction, a sub-tank is arranged in the solution tank, the sub-tank has an opening and is in communication with the solution tank, the lower coating roller is located in the sub-tank, and a flow channel structure capable of buffering and guiding the coating liquid in the solution tank to the sub-tank is arranged at the communication part of the sub-tank and the solution tank.

[0012] In order to form a more stable and physically isolated sub-tank structure, and at the same time optimize the coating liquid flow path, preferably, the sub-tank comprises two oppositely arranged inclined plates and a bottom plate connected at the bottom of the two inclined plates, the two inclined plates gradually converge from top to bottom, and the side ends of the two inclined plates and the bottom plate are connected with the inner wall of the solution tank.

[0013] In order to realize effective buffering of the coating liquid when flowing between the solution tank and the sub-tank, and reduce fluid impact, preferably, the flow channel structure comprises a buffering section arranged inside the inclined plate in the inclined direction, an inlet section communicated between the upper end of the buffering section and the solution tank, and an outlet section communicated between the lower end of the buffering section and the sub-tank.

[0014] In order to ensure the uniformity and stability of the coating liquid supply, and avoid interference of the flow channel with the working area of the coating roller, preferably, the flow channel structure has a plurality of flow channel structures, each flow channel structure is arranged on at least one inclined plate with a spacing, and the horizontal height of each flow channel structure is lower than the horizontal height of the lower coating roller.

[0015] In order to realize the smooth exchange of the solution tank and the coating liquid at the bottom of the sub-tank, prevent the generation of turbulence, preferably, a plurality of through holes are arranged on the bottom plate and are spaced to communicate the solution tank and the sub-tank.

[0016] The technical scheme adopted by the present application to solve the second technical problem is that an adjusting support is arranged on the solution tank, a hydraulic cylinder is mounted on the top of the adjusting support, a roller support is connected to the piston rod of the hydraulic cylinder after penetrating the adjusting support, and the upper coating roller is mounted in the roller support and is driven to ascend and descend by the hydraulic cylinder to adjust the distance between the upper coating roller and the lower coating roller.

[0017] In order to ensure the guiding accuracy and running stability of the upper coating roller during the ascending and descending process, prevent the generation of deflection, preferably, a guiding structure is arranged between the roller support and the adjusting support, the guiding structure comprises a first guiding block mounted on the outer side of the roller support, a second guiding block mounted on the inner side of the adjusting support, and a guide rod vertically fixed on the adjusting support, the guide rod penetrates the first guiding block and the second guiding block, and the first guiding block can slide up and down along the guide rod.

[0018] The technical scheme adopted by the present application to solve the third technical problem is that an auxiliary roller is arranged in the sub-tank downstream of the lower coating roller, a surrounding plate is arranged on the upper end of the solution tank and forms a semi-enclosing structure for the auxiliary roller, an opening is formed in the surrounding plate for the steel to pass through, and a shielding plate is arranged at the opening to adjust the opening size.

[0019] In order to realize the forced circulation and accurate supply of the coating liquid, prevent the precipitation and ensure that the coating area obtains stable and uniform coating liquid, preferably, a delivery pump and a circulation pipe are further included, the circulation pipe comprises an inlet pipe and an outlet pipe, the inlet end of the inlet pipe is communicated with the solution tank, and the outlet end is connected with the inlet of the delivery pump; the inlet end of the outlet pipe is connected with the outlet of the delivery pump, and the outlet end is connected with a spray pipe arranged along the axial direction of the lower coating roller, and a plurality of nozzles are arranged on the spray pipe and are directed to the contact area between the lower coating roller and the steel.

[0020] In order to realize the stable and reliable driving of the lower coating roller and have the transmission self-locking characteristic to improve the safety of the equipment, preferably, a motor is arranged on the side of the solution tank and is used to drive the lower coating roller to rotate, a gear box is connected with the output end of the motor, a worm and a worm wheel are arranged in the gear box and are meshed with each other, the worm is coaxially connected with the rotating shaft of the motor, and the output shaft of the worm wheel is in transmission connection with the roller shaft of the lower coating roller.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. By setting a sub-tank with an opening and intercommunicating with the solution tank in the solution tank, and setting the lower coating roller in the sub-tank, and setting the flow channel structure at the communication place of the sub-tank and the solution tank, since the sub-tank physically isolates the rotating area of the lower coating roller from the main liquid area of the solution tank, only the local coating liquid in the sub-tank is fluctuated when the lower coating roller rotates, avoiding the direct transmission to the large amount of coating liquid in the solution tank, and the flow channel structure can buffer and guide the coating liquid flowing from the solution tank to the sub-tank, thus effectively inhibiting the violent agitation of the coating liquid in the main liquid area when the lower coating roller rotates, reducing or avoiding the coating liquid fluctuation (undulation) phenomenon from the source, not only significantly improving the uniformity and stability of the coating liquid film on the surface of the lower coating roller, thereby ensuring the uniformity of the coating layer on the surface of the steel, but also effectively reducing the splashing of the coating liquid due to fluctuation, reducing the waste of coating liquid and equipment pollution.

[0023] 2. By additionally setting the upper coating roller and its guide structure which can be lifted and adjusted, the quick adaptation and stable compression of steel materials of different thicknesses are realized, and the operation efficiency and coating quality are improved.

[0024] 3. By setting the auxiliary roller and the fence with adjustable shielding plate, a smooth transition is provided for the coated steel, and the outlet size can be flexibly adjusted according to the thickness of the plate, effectively controlling the splashing of the coating liquid. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic diagram of a steel material roller coating device;

[0026] Figure 2 It is another perspective three-dimensional structure schematic diagram of a steel material roller coating device;

[0027] Figure 3 It is an exploded state bottom perspective three-dimensional structure schematic diagram of a steel material roller coating device;

[0028] Figure 4 It is a guide structure and gear box internal structure schematic diagram of a steel material roller coating device.

[0029] Figure 5 It is a sectional view structure schematic diagram of a steel material roller coating device.

[0030] 1, solution tank; 2, coating roller assembly; 2a, upper coating roller; 2b, lower coating roller; 3, sub-tank; 3a, inclined plate; 3b, bottom plate; 3b1, fine hole; 4, flow channel structure; 4a, buffer section; 4b, inlet section; 4c, outlet section; 6, adjusting support; 7, hydraulic cylinder; 8, roller support; 9, guide structure; 9a, first guide block; 9b, second guide block; 9c, guide rod; 10, auxiliary roller; 11, baffle; 11a, through opening; 12, shutter; 13, delivery pump; 14, circulation pipe; 14a, liquid inlet pipe; 14b, liquid outlet pipe; 15, spray pipe; 16, nozzle; 17, motor; 18, gear box; 18a, worm; 18b, worm wheel; 19, pad foot; 20, universal wheel; 21, side plate; 24, scraper; 25, mounting block; 26, adjusting screw hole; 27, locking bolt; 30, connecting flange; 33, adjusting piece; 34, insertion block; 35, handle; 36, insertion plate; 37, screw hole; 39, electromagnetic flow valve. DETAILED DESCRIPTION

[0031] The advantages and effects of the present application can be easily understood by those skilled in the art from the description. The present application can also be implemented or applied by different specific embodiments, and the details in the description can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0032] Example 1, Figures 1-5 As shown, the steel roller coating device in the embodiment mainly includes a solution tank 1, a coating roller assembly 2, a sub-tank 3, a flow channel structure 4, an adjusting support 6, a hydraulic cylinder 7, a roller support 8, a guide structure 9, an auxiliary roller 10, a baffle 11, a shutter 12, a delivery pump 13, a circulation pipe 14, a spray pipe 15, a nozzle 16, a motor 17, and a gear box 18. The steel roller coating device disclosed in the embodiment aims to solve the problems of low efficiency, uneven coating, and liquid splashing caused by the rotation of the coating roller in the existing laboratory coating device. The overall structure is isolated by the sub-tank, buffered and guided by the flow channel, and cooperated by multiple modules, so as to realize efficient and accurate coating of steel and adapt to the small batch test demand of the laboratory.

[0033] The structure and connection relationship of each component are as follows:

[0034] Solution tank 1: refer to Figures 1 to 5As shown, the solution tank 1 is used as a coating liquid storage and the basic component of the whole device, which is a tank structure with an open top; the inner wall is reserved for the installation position connected with the sub-tank 3, and the side is provided with a structure for fixing the motor 17, and the outer side wall is used for installing the conveying pump 13, and the upper end face is used for fixing the adjusting bracket 6 and the fence 11 respectively, providing a stable installation basis for each functional component. The bottom of the solution tank 1 is provided with a foot 19, and the foot 19 can be configured with a universal wheel 20 with a brake, which is convenient for the overall movement and fixation of the device, and meets the adjustment needs of different working positions in the laboratory; and the upper end face of the solution tank 1 is also provided with side plates 21 located on both sides of the coating roller assembly 2, which can further reduce the splashing of the coating liquid.

[0035] Coating roller assembly 2: refer to Figures 1 to 5 As shown, the coating roller assembly 2 includes an upper coating roller 2a and a lower coating roller 2b, which are arranged opposite to each other along the vertical direction to cooperate to realize the coating of steel materials; the roller shaft of the upper coating roller 2a is installed at both ends inside the roller bracket 8 and can rotate freely relative to the roller bracket 8; the roller shaft of the lower coating roller 2b penetrates through the side wall of the solution tank 1, and the penetration is sealed to prevent leakage of the coating liquid, and one end of the roller shaft of the lower coating roller 2b is in transmission connection with the output shaft of the gear box 18, which can be driven to rotate under the drive of the gear box 18. The diameter of the upper coating roller 2a is smaller than that of the lower coating roller 2b, and the lengths of the two are consistent, which not only meets the coating effect of silicon steel sheets, but also reduces the overall weight of the roller bracket 8 and the upper coating roller 2a, and reduces the load when the hydraulic cylinder 7 is lifted; at the same time, the roller shaft of the upper coating roller 2a is sleeved with bearings at both ends, which are installed in the bearing seat on the inner side wall of the roller bracket 8, ensuring smooth rotation of the upper coating roller 2a.

[0036] Sub-tank 3: refer to Figures 1 to 5As shown, the sub-tank 3 is arranged inside the solution tank 1, has an opening and is in communication with the solution tank 1, and the lower coating roller 2b is located in the sub-tank 3; the sub-tank 3 specifically comprises two oppositely arranged inclined plates 3a and a bottom plate 3b connected at the bottom of the two inclined plates 3a, the two inclined plates 3a gradually converge from top to bottom, and the side ends of the two inclined plates 3a and the bottom plate 3b are connected with the inner wall of the solution tank 1 to form a relatively independent sub-chamber, and the top of the inclined plate 3a is flush with the top of the solution tank 1; a plurality of spaced-apart fine holes 3b1 are arranged through the bottom plate 3b, the fine holes 3b1 are used to communicate the solution tank 1 and the sub-tank 3, and realize slow circulation of the coating liquid between the two. The sub-tank 3 has a trapezoidal shape with the top being larger than the bottom, and an auxiliary roller 10 is further arranged in the sub-tank 3, the auxiliary roller 10 has the same shape and size as the lower coating roller 2b and is located in the same horizontal plane, and can support and transition the coated steel. In addition, the inner walls of the two inclined plates 3a are symmetrically provided with scrapers 24, the scrapers 24 are connected with the inclined plates 3a through mounting blocks 25, a plurality of adjusting screw holes 26 are arranged in the inclined plates 3a from top to bottom, locking bolts 27 penetrate the mounting blocks 25 and are screwed into the adjusting screw holes 26 at different positions, so that the distance between the scrapers 24 and the lower coating roller 2b and the auxiliary roller 10 can be changed, the coating liquid on the surface of the coating roller is more uniform, and the excess coating liquid can be scraped off at the same time.

[0037] Flow channel structure 4: refer to Figure 5 As shown, the flow channel structure 4 is arranged at the communication position between the sub-tank 3 and the solution tank 1, and is used to buffer and guide the coating liquid in the solution tank 1 to the sub-tank 3; the flow channel structure 4 is arranged in the inclined plate 3a, each flow channel structure 4 comprises a buffer section 4a arranged along the inclined direction of the inclined plate 3a, an inlet section 4b in communication between the upper end of the buffer section 4a and the solution tank 1, and an outlet section 4c in communication between the lower end of the buffer section 4a and the sub-tank 3; the flow channel structure 4 has a plurality of flow channel structures 4, each flow channel structure 4 is arranged on at least one inclined plate 3a and is spaced apart, and the horizontal height of each flow channel structure 4 is lower than the horizontal height of the lower coating roller 2b, so that the coating liquid in the sub-tank 3 can always immerse the lower coating roller 2b. The flow channel structure 4 is distributed in multiple rows in the inclined plate 3a, and each row has a plurality of flow channel structures 4, the flow channel structure 4 is located in the middle and lower parts of the inclined plate 3a, so that even if the coating liquid in the solution tank 1 is less, the coating liquid can also be circulated stably, and the coating liquid can also be prevented from being impacted when circulating in the sub-tank 3.

[0038] Adjusting bracket 6: refer to Figure 1 and Figure 4 As shown, the adjusting bracket 6 is arranged on the solution tank 1, the top of the adjusting bracket 6 is used to mount the hydraulic cylinder 7, provides stable support for the hydraulic cylinder 7, and provides a guiding basis for the lifting of the roller bracket 8 through its structure. The adjusting bracket 6 has a frame structure, can be fixed with the upper end surface of the solution tank 1 through bolts or other fixing modes, and the connection position can also be provided with anti-skid washers to improve the installation stability.

[0039] Hydraulic cylinder 7 and roller bracket 8: refer toFigure 1 and Figure 4 As shown, hydraulic cylinder 7 is installed on top of adjusting bracket 6. The piston rod of hydraulic cylinder 7 passes through adjusting bracket 6 and connects to roller bracket 8. Roller bracket 8 is used to install upper coating roller 2a. By driving roller bracket 8 to rise and fall through hydraulic cylinder 7, the distance between upper coating roller 2a and lower coating roller 2b can be adjusted to meet the coating requirements of steel of different thicknesses. Roller bracket 8 has an overall "U" shaped structure. Its top center has a connecting flange 30 that matches the piston rod of hydraulic cylinder 7. It is fixed to the piston rod with bolts. Hydraulic cylinder 7 can be replaced with a matching cylinder or electric push rod, as long as it can accurately control the rise and fall of upper coating roller 2a to the required position.

[0040] Guide Structure 9: Reference Figure 4 As shown, the guide structure 9 is disposed between the roller support 8 and the adjusting support 6 to ensure smooth lifting and lowering of the roller support 8. The guide structure 9 includes a first guide block 9a installed on the outside of the roller support 8, a second guide block 9b installed on the inside of the adjusting support 6, and a guide rod 9c vertically fixed on the adjusting support 6. The guide rod 9c passes through the first guide block 9a and the second guide block 9b, and the first guide block 9a can slide up and down along the guide rod 9c to prevent the roller support 8 from deviating during lifting and lowering. The surface of the guide rod 9c can be smoothed to ensure smoothness and reduce the frictional resistance when the first guide block 9a slides. The second guide block 9b mainly serves to support the bottom of the guide rod 9c to ensure the verticality of the guide rod 9c.

[0041] Auxiliary roller 10, surrounding plate 11 and blind plate 12: Reference Figure 2 and Figure 5 As shown, the auxiliary roller 10 is set in the sub-groove 3 and is located downstream of the lower coating roller 2b, which serves to support and transition the coated steel. The surrounding plate 11 is installed at the upper end of the solution tank 1, forming a semi-enclosed structure for the auxiliary roller 10. The surrounding plate 11 has an opening 11a for the steel to pass through. The shielding plate 12 is adjustablely set at the opening 11a. By adjusting the position of the shielding plate 12, the opening size of the opening 11a can be changed to accommodate steel of different thicknesses and prevent the coating liquid from splashing. The position of the mask 12 is adjusted by the adjusting component 33. The adjusting component 33 includes a U-shaped insert 34 and a handle 35 with a screw. The insert 34 is fixed on the surrounding plate 11. An insert 36 is fixed in the middle of the mask 12. A row of screw holes 37 are opened on the insert 36 along the length direction. The screw of the handle 35 passes through the insert and is screwed into the screw hole 37. By rotating the handle 35, the screw can be engaged with different screw holes 37, thereby fixing the position of the mask 12 and changing the size of the passage 11a. The mask 12 is located on the back of the outer side of the surrounding plate 11, which can help the steel to pass smoothly through the passage 11a and prevent the steel from curling up after moving away from the lower coating roller 2b.

[0042] Delivery pump 13, circulation pipe 14, nozzle 15 and nozzle 16: Reference Figure 1 andFigure 3 As shown, the conveying pump 13 is used for conveying the coating liquid; the circulating pipe 14 comprises a liquid inlet pipe 14a and a liquid outlet pipe 14b, the inlet end of the liquid inlet pipe 14a is communicated with the solution tank 1, and the outlet end is connected with the inlet of the conveying pump 13; the inlet end of the liquid outlet pipe 14b is connected with the outlet of the conveying pump 13, and the outlet end is connected with a spray pipe 15; the spray pipe 15 is arranged along the axial direction of the lower coating roller 2b, a plurality of nozzles 16 are arranged on the spray pipe 15 at intervals, the nozzles 16 are directed towards the contact area between the lower coating roller 2b and the steel material, and are used for supplementing the coating liquid to the coating area. The inlet end of the liquid inlet pipe 14a is directly below the bottom plate 3b of the sub-tank 3, so as to ensure that the coating liquid at the bottom of the solution tank 1 can be pumped; the inlet end of the conveying pump 13 is provided with a filter core, so as to prevent impurities from blocking the pipeline; an electromagnetic flow valve 39 can be arranged on the liquid outlet pipe 14b, so as to control the intermittent conduction and closing of the liquid outlet pipe 14b, and further control the flow rate of the coating liquid; and the opening of the nozzle 16 is in a flat strip structure, so that the coating liquid can more comprehensively cover the contact area between the lower coating roller 2b and the steel material, and the positions of the spray pipe 15 and the nozzle 16 are all lower than the highest top position of the lower coating roller 2b, so as to avoid affecting the conveying of the steel material.

[0043] Motor 17 and gear box 18: reference Figure 1 and Figure 4 As shown, the motor 17 is installed on the side of the solution tank 1, and is used for driving the lower coating roller 2b to rotate; the output end of the motor 17 is connected with the gear box 18, the gear box 18 is provided with a worm 18a and a worm wheel 18b which are meshed with each other, the worm 18a is fixedly connected with the rotating shaft of the motor 17, the output shaft of the worm wheel 18b is in driving connection with the roller shaft of the lower coating roller 2b, and the meshing transmission of the worm 18a and the worm wheel 18b realizes the transmission of the motor power to the lower coating roller 2b. The motor 17 can be selected from a stepping motor or a servo motor, and the specific model is selected according to actual needs; in addition to the worm and worm wheel transmission, the driving mode of the motor 17 to the lower coating roller 2b can also adopt direct connection driving, chain transmission or other speed reduction mechanism transmission, and can be flexibly selected according to actual scenes.

[0044] The working principle of the steel material roller coating device in the embodiment is as follows:

[0045] 1. Preparation before coating and adjustment of distance: according to the thickness of the steel material to be coated, such as silicon steel sheet, start the hydraulic cylinder 7, the piston rod of the hydraulic cylinder 7 drives the roller support 8 to slide up and down along the guide rod 9c, the first guide block 9a synchronously slides along the guide rod 9c with the roller support 8, and the distance between the upper coating roller 2a and the lower coating roller 2b is adjusted to adapt to the thickness of the steel material; inject the coating solution into the solution tank 1, the coating solution enters the buffer section 4a through the inlet section 4b of the flow channel structure 4, after buffering, flows into the sub-tank 3 from the outlet section 4c, and part of the coating solution seeps into the sub-tank 3 through the fine holes 3b1 of the bottom plate 3b, until the lower part of the lower coating roller 2b is immersed in the coating solution (ensure that the lower coating roller 2b is partially immersed in the coating solution); adjust the baffle 12 according to the thickness of the steel material, rotate the handle 35 of the adjusting part 33, make the screw hole 37 at the corresponding position on the screw rod cooperate with the plug plate 36, fix the baffle 12, and the opening size of the through opening 11a of the surrounding plate 11 adapts to the steel material; at the same time, adjust the position of the scraper 24 in the inner wall of the inclined plate 3a, fix the scraper 24 at the appropriate adjusting screw hole 26 by the locking bolt 27, so that the scraper maintains a predetermined distance with the lower coating roller 2b and the auxiliary roller 10.

[0046] 2. Coating solution circulation and power transmission: start the delivery pump 13 and the motor 17, if the electromagnetic flow valve 39 is provided on the outlet pipe 14b, it can be opened synchronously and the flow parameter is set; the delivery pump 13 extracts the coating solution from the solution tank 1 through the inlet pipe 14a, delivers it to the spray pipe 15 through the outlet pipe 14b, and then sprays it to the contact area between the lower coating roller 2b and the steel material through the nozzle 16; the motor 17 drives the worm 18a to rotate, the worm 18a engages the drive worm gear 18b, and the worm gear 18b drives the lower coating roller 2b to rotate stably, the lower coating roller 2b absorbs the coating solution in the sub-tank 3 when rotating, forming a uniform coating solution film, and the scraper 24 removes the excess coating solution on the surface of the lower coating roller 2b, further ensuring the uniform thickness of the coating solution film.

[0047] 3. Steel coating and transition support: one end of the steel material to be coated is horizontally sent into the steel material from between the lower coating roller 2b and the upper coating roller 2a, the upper coating roller 2a is passively rotated by the steel material, the coating solution film on the surface of the lower coating roller 2b is transferred to the surface of the steel material, and the upper coating roller 2a cooperates to apply pressure to make the coating solution uniformly distributed; the coated steel material is continuously conveyed above the auxiliary roller 10, the auxiliary roller 10 rotates with the steel material and supports the steel material, preventing the steel material from sagging and causing the coating to deform, the coating solution on the surface of the auxiliary roller 10 can also perform secondary coating on the surface of the steel material, improving the uniformity of coating, and the scraper 24 removes the excess coating solution on the surface of the auxiliary roller 10; the steel material is finally output through the through opening 11a of the surrounding plate 11, the baffle 12 blocks the coating solution in the sub-tank 3 from splashing out of the through opening 11a, the excess coating solution in the sub-tank 3 flows back to the solution tank 1 through the fine holes 3b1 of the bottom plate 3b, forming a coating solution circulation, which can reduce the precipitation of the coating solution and ensure the stability of the coating quality.

[0048] The above specific embodiments are only several optional embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A steel roller coating apparatus, comprising a solution tank (1) and a coating roller assembly (2), wherein the coating roller assembly (2) comprises an upper coating roller (2a) and a lower coating roller (2b), the upper coating roller (2a) and the lower coating roller (2b) being arranged vertically opposite to each other, characterized in that: The solution tank (1) is provided with a sub-tank (3), the sub-tank (3) has an opening and is connected to the solution tank (1), the lower coating roller (2b) is located in the sub-tank (3), and the sub-tank (3) and the solution tank (1) are also provided with a flow channel structure (4) that allows the coating liquid in the solution tank (1) to be buffered and guided to the sub-tank (3).

2. The steel roller coating apparatus according to claim 1, characterized in that: The sub-tank (3) includes two opposing inclined plates (3a) and a bottom plate (3b) connected to the bottom of the two inclined plates (3a). The two inclined plates (3a) gradually approach each other from top to bottom, and the side ends of the two inclined plates (3a) and the bottom plate (3b) are connected to the inner wall of the solution tank (1).

3. The steel roller coating apparatus according to claim 2, characterized in that: The flow channel structure (4) includes a buffer section (4a) disposed inside the inclined plate (3a) along the inclined direction, an inlet section (4b) connecting the upper end of the buffer section (4a) to the solution tank (1), and an outlet section (4c) connecting the lower end of the buffer section (4a) to the sub-tank (3).

4. The steel roller coating apparatus according to claim 2, characterized in that: The flow channel structure (4) has multiple flow channel structures (4) spaced apart on at least one inclined plate (3a), and the horizontal height of each flow channel structure (4) is lower than the horizontal height of the lower coating roller (2b).

5. The steel roller coating apparatus according to claim 2, characterized in that: The base plate (3b) is provided with a plurality of spaced holes (3b1) to connect the solution tank (1) and the sub-tank (3).

6. The steel roller coating apparatus according to any one of claims 1 to 5, characterized in that: The solution tank (1) is provided with an adjustment bracket (6), and a hydraulic cylinder (7) is installed on the top of the adjustment bracket (6). The piston rod of the hydraulic cylinder (7) passes through the adjustment bracket (6) and is connected to a roller bracket (8). The upper coating roller (2a) is installed in the roller bracket (8). The roller bracket (8) is driven to rise and fall by the hydraulic cylinder (7) to adjust the distance between the upper coating roller (2a) and the lower coating roller (2b).

7. The steel roller coating apparatus according to claim 6, characterized in that: A guide structure (9) is provided between the roller support (8) and the adjusting support (6). The guide structure (9) includes a first guide block (9a) installed on the outside of the roller support (8), a second guide block (9b) installed on the inside of the adjusting support (6), and a guide rod (9c) vertically fixed on the adjusting support (6). The guide rod (9c) passes through the first guide block (9a) and the second guide block (9b), and the first guide block (9a) can slide up and down along the guide rod (9c).

8. The steel roller coating apparatus according to any one of claims 1 to 5 and 7, characterized in that: The sub-trough (3) is provided with an auxiliary roller (10) located downstream of the lower coating roller (2b). A surrounding plate (11) forming a semi-enclosed structure for the auxiliary roller (10) is installed at the upper end of the solution tank (1). The surrounding plate (11) has an opening (11a) for steel to pass through, and a baffle (12) is provided at the opening (11a) to adjust the size of the opening.

9. The steel roller coating apparatus according to claim 1, characterized in that: It also includes a delivery pump (13) and a circulation pipe (14). The circulation pipe (14) includes an inlet pipe (14a) and an outlet pipe (14b). The inlet end of the inlet pipe (14a) is connected to the solution tank (1), and the outlet end is connected to the inlet of the delivery pump (13). The inlet end of the outlet pipe (14b) is connected to the outlet of the delivery pump (13), and the outlet end is connected to a spray pipe (15) arranged axially along the lower coating roller (2b). The spray pipe (15) is provided with a plurality of nozzles (16) spaced apart toward the contact area between the lower coating roller (2b) and the steel.

10. The steel roller coating apparatus according to claim 1, characterized in that: A motor (17) for driving the lower coating roller (2b) to rotate is installed on the side of the solution tank (1). The output end of the motor (17) is connected to a gearbox (18). The gearbox (18) is provided with a worm (18a) and a worm wheel (18b) that mesh with each other. The worm (18a) is coaxially connected to the rotating shaft of the motor (17). The output shaft of the worm wheel (18b) is connected to the roller shaft of the lower coating roller (2b) for transmission.

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