Strip steel coating weight control device

Abstract

The invention relates to the field of control equipment, and discloses a strip steel coating weight control device which comprises a hot galvanizing pool, the top of the hot galvanizing pool is fixedly connected with a supporting frame, and the supporting frame is provided with a thickness control mechanism, a heat dissipation and dehumidification mechanism and a disassembly and assembly mechanism; the thickness control mechanism comprises a hydraulic cylinder, a push frame, a strip steel placing seat, a connecting pipe, a jet head, a gas guide pipe I, a gas guide pipe II, a solenoid valve I, a solenoid valve II and a jacking block; the hydraulic cylinder is fixedly installed on the top of the supporting frame, a hydraulic rod of the hydraulic cylinder is fixedly connected with the pushing frame, the top of the strip steel containing base is fixedly connected with the pushing frame, the connecting pipe is fixedly installed on the pushing frame, the air spraying head is fixedly installed on the connecting pipe, and the first air guiding pipe is fixedly installed on the supporting frame. The invention has the following advantages and effects: the processing efficiency is improved, the programmable logic controller is convenient to disassemble and assemble, and the programmable logic controller is convenient to dehumidify and dissipate heat.

Description

Technical Field

[0001] This invention relates to the field of control equipment technology, and in particular to a strip steel coating weight control device. Background Technology

[0002] Galvanized steel strip is made by coating long, narrow strips of cold-rolled or hot-rolled steel with a layer of raw material called zinc or aluminum to varying degrees. Hot-dip galvanizing has advantages such as uniform coating, strong adhesion, and long service life. In hot-dip galvanized steel strip, the substrate undergoes a complex physical and chemical reaction with the molten galvanizing solution, forming a corrosion-resistant, tightly structured zinc-iron alloy layer. This alloy layer is integrated with the pure zinc layer and the steel strip substrate, resulting in strong corrosion resistance.

[0003] The prior art, with publication number CN220300827U, discloses a hot-dip galvanized strip edge coating control device, including a machine compartment. Air knives are fixed at both the upper and lower ends of the inner cavity of the machine compartment. An adjustment component is provided inside the machine compartment. The adjustment component includes a compartment body fixed to the upper surface of the machine compartment. Two fans are fixed at the upper end of the compartment body. Multiple heating plates are fixed inside the compartment body. Conduits are fixed at both the left and right ends of the compartment body. Corrugated pipes are fixed at the other end of the conduits.

[0004] This hot-dip galvanized strip edge coating control device, equipped with adjustment components, can heat the edge of the strip, slowing down the cooling rate of the edge coating and preventing excessively thick edge coating. Furthermore, the strip is less prone to vibration, avoiding damage from the air knife. Strip stability also helps control the coating thickness and allows for adjustment of the distance between the two sets of nozzles, enabling heating of strips of different sizes.

[0005] In use, the electrical components are controlled by an external programmable logic controller (PLC). The PLC uses a programmable memory to store programs and execute user-oriented instructions such as logical operations, sequential control, timing, counting, and arithmetic operations. It controls various types of machinery or production processes through digital or analog input / output. During the hot-dip galvanizing process of strip steel, the ambient temperature and humidity are high, and the PLC cannot efficiently dissipate heat and dehumidify, affecting its service life. Furthermore, the PLC is inconvenient to disassemble and maintain, and it slows down the cooling rate of the strip steel edge coating. This delay makes it difficult to accelerate the cooling of the steel edge coating after completion, affecting overall processing efficiency. Therefore, a strip steel coating weight control device needs to be designed to solve these problems. Summary of the Invention

[0006] The purpose of this invention is to provide a strip coating weight control device to solve the above-mentioned problems.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a strip steel coating weight control device, comprising:

[0008] A hot-dip galvanizing tank, the top of which is fixedly connected to a support frame, which is equipped with a thickness control mechanism, a heat dissipation and dehumidification mechanism and a disassembly and assembly mechanism.

[0009] The thickness control mechanism includes a hydraulic cylinder, a pusher, a strip steel placement seat, a connecting pipe, a jet nozzle, an air guide pipe one, an air guide pipe two, a solenoid valve one, a solenoid valve two, and a jacking block.

[0010] The hydraulic cylinder is fixedly installed on the top of the support frame, the hydraulic rod of the hydraulic cylinder is fixedly connected to the push frame, the top of the strip steel placement seat is fixedly connected to the push frame, the connecting pipe is fixedly installed on the push frame, the jet nozzle is fixedly installed on the connecting pipe, the first air guide pipe is fixedly installed on the support frame, the first air guide pipe and the connecting pipe are in sliding sealing contact, the second air guide pipe is fixedly installed on the first air guide pipe, the first solenoid valve and the second solenoid valve are fixedly installed on the first air guide pipe and the second air guide pipe respectively, and the bottom of the jacking block is fixedly connected to the push frame.

[0011] A further configuration of the present invention is as follows: the disassembly and assembly mechanism includes a programmable logic controller, a suction cup, a conductive tube, a vertical tube, an inner tube, a sleeve, and a spring. The suction cup is fixedly installed at the bottom of the programmable logic controller and is attracted to the support frame. The conductive tube is fixedly installed on two suction cups. The vertical tube is fixedly installed on the support frame. The inner tube is slidably and sealingly installed on the vertical tube. The top of the inner tube is closed. The inner tube has multiple vent holes near the top outer side. The vent holes are located inside the vertical tube. The sleeve is fixedly sleeved on the outer side of the inner tube. The spring is fixedly installed between the sleeve and the support frame.

[0012] A further configuration of the present invention is as follows: the heat dissipation and dehumidification mechanism includes an air pump, a return pipe, a water box, a side box, a first pipe body, a second pipe body, absorbent cotton, a first mesh plate, a counterweight, and a second mesh plate. The air pump is fixedly installed on the top of the programmable logic controller (PLC), the water box is fixedly installed on the top of the support frame, the return pipe is fixedly installed on the air pump, the water box, and the PLC, the side box is fixedly installed on the PLC, the first pipe body is fixedly installed between the side box and the PLC, the second pipe body is fixedly installed between the side box and the air pump, the first mesh plate is fixedly installed inside the side box, the absorbent cotton is fixedly installed at the bottom of the first mesh plate, the top of the counterweight is fixedly connected to the second mesh plate, and the counterweight is slidably installed on the side box and the support frame.

[0013] By adopting the above technical solution, it is convenient to perform dehumidification and heat dissipation treatment on programmable logic controllers.

[0014] A further feature of the present invention is that the water box has an installation hole, and the right air guide tube is fixedly installed in the installation hole.

[0015] A further provision of the present invention is that the bottom of the counterweight is in contact with the jacking block.

[0016] By adopting the above technical solution, the upward movement of the jacking block can move the counterweight block.

[0017] A further feature of the present invention is that a drain pipe is fixedly installed on the side box.

[0018] By adopting the above technical solution, it is convenient to drain the water squeezed out of the absorbent cotton.

[0019] A further feature of the present invention is that the water box contains clean water.

[0020] A further feature of the present invention is that the water box contains clean water.

[0021] A further feature of the present invention is that the second air duct is connected to a cooler.

[0022] A further provision of the present invention is that the bottom of the second mesh plate is in contact with the bottom inner wall of the side box.

[0023] The beneficial effects of this invention are:

[0024] 1. This invention uses a hydraulic cylinder to lift and lower the strip steel placement seat, and uses a solenoid valve to control the opening and closing of the air guide pipe one and the air guide pipe two. Hot air can be blown out first to slow down the cooling rate of the coating on the edge of the strip steel to prevent the coating on the edge from being too thick. Then, cold air is blown out to quickly cool both sides of the strip steel, thereby improving processing efficiency.

[0025] 2. This invention utilizes a mechanism consisting of a push block, an inner tube, a sleeve, and a spring. When the push block is moved upward by the push frame, the inner tube can be moved upward, allowing the inside of the suction cup to connect with the outside, relieving the negative pressure, facilitating the disassembly and assembly of the programmable logic controller, and making it convenient for inspection and maintenance.

[0026] 3. This invention uses an air pump to extract hot air from inside the programmable logic controller (PLC), and then allows the hot air to pass through a water box filled with clean water for cooling via a return air pipe. The cooled air then returns to the PLC, achieving rapid heat dissipation. At the same time, the flow of cold air in the second air duct can cool the clean water. The moisture-absorbing cotton can absorb internal moisture, and the actuating block actuates the counterweight block, causing the second mesh plate to squeeze the moisture-absorbing cotton to squeeze out the water, ensuring the dehumidification effect of the moisture-absorbing cotton. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a strip steel coating weight control device proposed in this invention. Figure 1 .

[0029] Figure 2 This is a schematic diagram of the structure of a strip steel coating weight control device proposed in this invention. Figure 2 .

[0030] Figure 3 This is a schematic cross-sectional view of a strip steel coating weight control device proposed in this invention. Figure 1 .

[0031] Figure 4 This is a schematic cross-sectional view of a strip steel coating weight control device proposed in this invention. Figure 2 .

[0032] Figure 5 yes Figure 1 A schematic diagram of part A in the diagram.

[0033] Figure 6 yes Figure 2 A schematic diagram of part B in the diagram.

[0034] Figure 7 yes Figure 3 A schematic diagram of part C in the diagram.

[0035] In the diagram, 1. Hot-dip galvanizing tank; 2. Support frame; 3. Hydraulic cylinder; 4. Push frame; 5. Strip steel placement seat; 6. Connecting pipe; 7. Jet nozzle; 8. Air guide pipe one; 9. Air guide pipe two; 10. Solenoid valve one; 11. Solenoid valve two; 12. Programmable logic controller; 13. Suction cup; 14. Conductor pipe; 15. Vertical pipe; 16. Inner pipe; 17. Sleeve disc; 18. Spring; 19. Pushing block; 20. Air pump; 21. Air return pipe; 22. Water box; 23. Side box; 24. Pipe body one; 25. Pipe body two; 26. Moisture-absorbing cotton; 27. Mesh plate one; 28. Counterweight; 29. ​​Mesh plate two. Detailed Implementation

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0037] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The present invention provides a strip steel coating weight control device, comprising:

[0039] Hot-dip galvanizing tank 1, with a support frame 2 fixedly connected to the top of the hot-dip galvanizing tank 1. The support frame 2 is equipped with a thickness control mechanism, a heat dissipation and dehumidification mechanism and a disassembly and assembly mechanism.

[0040] The thickness control mechanism includes a hydraulic cylinder 3, a pusher 4, a strip steel placement seat 5, a connecting pipe 6, a jet nozzle 7, an air guide pipe 1 8, an air guide pipe 2 9, a solenoid valve 10, a solenoid valve 2 11, and an actuating block 19.

[0041] Hydraulic cylinder 3 is fixedly installed on the top of support frame 2. The hydraulic rod of hydraulic cylinder 3 is fixedly connected to push frame 4. The top of strip steel placement seat 5 is fixedly connected to push frame 4. Connecting pipe 6 is fixedly installed on push frame 4. Jet nozzle 7 is fixedly installed on connecting pipe 6. Air guide pipe 1 8 is fixedly installed on support frame 2. Air guide pipe 1 8 and connecting pipe 6 are in sliding sealing contact. Air guide pipe 2 9 is fixedly installed on air guide pipe 1 8. Solenoid valve 1 10 and solenoid valve 2 11 are fixedly installed on air guide pipe 1 8 and air guide pipe 2 9 respectively. The bottom of push block 19 is fixedly connected to push frame 4.

[0042] With the above structure, starting the hydraulic cylinder 3 allows the strip steel placement seat 5 to move the strip steel down into the hot-dip galvanizing bath 1 for galvanizing. After galvanizing, the strip steel placement seat 5 returns to its original position. At this time, the solenoid valve 10 is opened, allowing hot air to be blown out through the jet nozzle 7 and directed towards both sides of the strip steel. This slows down the cooling rate of the coating on the edges of the strip steel, thus preventing the coating from becoming too thick. Then, the solenoid valve 21 is opened and the solenoid valve 10 is closed, allowing cold air to be blown out from the jet nozzle 7 to quickly cool both sides of the strip steel and improve processing efficiency.

[0043] Specifically, the disassembly and assembly mechanism includes a programmable logic controller 12, a suction cup 13, a conductive tube 14, a vertical tube 15, an inner tube 16, a sleeve 17, and a spring 18. The suction cup 13 is fixedly installed on the bottom of the programmable logic controller 12 and is attracted to the support frame 2. The conductive tube 14 is fixedly installed on two suction cups 13. The vertical tube 15 is fixedly installed on the support frame 2. The inner tube 16 is slidably and sealed on the vertical tube 15. The top of the inner tube 16 is closed. Multiple vent holes are opened on the outer side of the inner tube 16 near the top. The vent holes are located inside the vertical tube 15. The sleeve 17 is fixedly sleeved on the outer side of the inner tube 16. The spring 18 is fixedly installed between the sleeve 17 and the support frame 2.

[0044] With the above structure, the hydraulic cylinder 3 is activated, causing the pusher 4 to move the actuating block 19 upward. The actuating block 19 can actuate the sleeve 17, which compresses the spring 18. The sleeve 17 moves the inner tube 16 upward, so that the vent hole on the inner tube 16 is connected to the inside of a suction cup 13. At this time, the inside of the suction cup 13 is connected to the outside, relieving the negative pressure inside the suction cup 13, thus facilitating the disassembly and assembly of the programmable logic controller 12.

[0045] Specifically, the heat dissipation and dehumidification mechanism includes an air pump 20, a return pipe 21, a water box 22, a side box 23, a first pipe body 24, a second pipe body 25, a moisture-absorbing cotton 26, a first mesh plate 27, a counterweight 28, and a second mesh plate 29. The air pump 20 is fixedly installed on the top of the programmable logic controller 12, the water box 22 is fixedly installed on the top of the support frame 2, the return pipe 21 is fixedly installed on the air pump 20, the water box 22, and the programmable logic controller 12, the side box 23 is fixedly installed on the programmable logic controller 12, the first pipe body 24 is fixedly installed between the side box 23 and the programmable logic controller 12, the second pipe body 25 is fixedly installed between the side box 23 and the air pump 20, the first mesh plate 27 is fixedly installed inside the side box 23, the moisture-absorbing cotton 26 is fixedly installed at the bottom of the first mesh plate 27, the top of the counterweight 28 is fixedly connected to the second mesh plate 29, and the counterweight 28 is slidably installed on the side box 23 and the support frame 2.

[0046] With the above structure, starting the air pump 20 can extract the hot air from inside the programmable logic controller 12. The hot air can flow in the return air pipe 21, and the cold water in the water box 22 cools the hot air, allowing the cold air to re-enter the programmable logic controller 12. This can quickly dissipate heat from the programmable logic controller 12. When the cold air flows in the air guide pipe 29, it can carry away the heat from the water and cool the water, keeping it at a low temperature. The moisture-absorbing cotton 26 can absorb the internal moisture for dehumidification. Starting the hydraulic cylinder 3 causes the pusher 4 to move the top block 19 upward. The top block 19 can push the counterweight 28, which causes the mesh plate 29 to squeeze the moisture-absorbing cotton 26, thus squeezing out the water from the moisture-absorbing cotton 26 and ensuring the dehumidification effect of the moisture-absorbing cotton 26.

[0047] Specifically, the water box 22 has an installation hole, the right air guide pipe 29 is fixedly installed in the installation hole, the bottom of the counterweight 28 is in contact with the jacking block 19, the side box 23 is fixedly installed with a drain pipe, and the water box 22 is filled with clean water. It should be added that this facilitates the cooling of the clean water in the water box 22.

[0048] Specifically, air duct 8 is connected to a hot air blower, and air duct 9 is connected to a cold air blower. It should be noted that this facilitates the introduction of hot or cold air.

[0049] Specifically, the bottom of the second mesh plate 29 contacts the bottom inner wall of the side box 23. It should be added that the second mesh plate 29 can be limited.

[0050] Working principle:

[0051] Start hydraulic cylinder 3, its hydraulic rod extends and pushes push frame 4 downward. Since strip steel placement seat 5 is fixedly connected to push frame 4, strip steel placement seat 5 descends accordingly, causing the strip steel placed on it to move down and be immersed in hot-dip galvanizing bath 1 for hot-dip galvanizing. After galvanizing is completed, hydraulic rod of hydraulic cylinder 3 retracts, causing push frame 4 and strip steel placement seat 5 to rise back to their original positions. After returning to their original positions, solenoid valve 10 is opened. At this time, hot air generated by hot air blower connected to air guide pipe 8 is blown out from jet nozzle 7 through air guide pipe 8 and connecting pipe 6, directly blowing towards both sides of strip steel. Under the action of hot air, the cooling rate of the coating on the edge of strip steel is slowed down, effectively preventing the coating on the edge from becoming too thick due to excessive cooling.

[0052] After the delayed cooling has achieved a certain effect, the solenoid valve 10 is closed and the solenoid valve 21 is opened. The cold air generated by the air cooler connected to the air guide pipe 29 passes through the air guide pipe 29 and the connecting pipe 6 and is blown out from the jet head 7 to quickly cool both sides of the strip steel. This cooling method of slow cooling followed by fast cooling ensures the coating quality and improves the overall processing efficiency.

[0053] The suction cup 13 at the bottom of the programmable logic controller 12 is tightly attached to the support frame 2. The conductive tube 14 connects the two suction cups 13, forming a relatively closed space inside the suction cup 13 and maintaining negative pressure to ensure that the programmable logic controller 12 is firmly installed on the support frame 2. When it is necessary to disassemble or assemble the programmable logic controller 12, the hydraulic cylinder 3 is activated, the pusher 4 drives the push block 19 to move upward, the push block 19 pushes the sleeve 17 upward, the sleeve 17 compresses the spring 18 and drives the inner tube 16 to move upward synchronously, the inner tube 16 moves upward to the vent hole and connects with the inside of one of the suction cups 13, so that the inside of the suction cup 13 is connected to the outside atmosphere, breaking the negative pressure state, thereby releasing the suction cup 13 from the support frame 2, making it convenient to disassemble the programmable logic controller 12 for inspection and maintenance. The installation is done by reversing the operation.

[0054] Start the air pump 20. The air pump 20 extracts the hot air generated inside the programmable logic controller 12 during operation. The hot air enters the side box 23 through the first pipe 24, then enters the air pump 20 through the second pipe 25, and is then delivered to the water box 22 through the return air pipe 21. The water box 22 is filled with clean water. Since the second air guide pipe 9 on the right is fixed in the mounting hole of the water box 22, the flow of cold air in the second air guide pipe 9 can carry away the heat in the clean water during the thickness control process, so that the clean water is kept at a low temperature. When the hot air flows through the water box 22, it is cooled by the low temperature clean water. The cooled air then re-enters the programmable logic controller 12 through the return air pipe 21, realizing the cyclic heat dissipation of the programmable logic controller 12.

[0055] During the airflow process inside the programmable logic controller 12, the moisture-absorbing cotton 26 in the side box 23 plays a role. When the air passes through the moisture-absorbing cotton 26, the moisture in it is absorbed, achieving a dehumidification effect. When it is necessary to squeeze the moisture in the moisture-absorbing cotton 26 to ensure its continuous dehumidification capacity, the hydraulic cylinder 3 is activated, and the pusher 4 drives the top block 19 to move upward. The top block 19 pushes the counterweight 28 upward, and the counterweight 28 drives the mesh plate 29 to rise. The rising mesh plate 29 squeezes the moisture-absorbing cotton 26, squeezing out the moisture absorbed by the moisture-absorbing cotton 26 and discharging it through the drain pipe on the side box 23, ensuring that the moisture-absorbing cotton 26 always maintains good dehumidification performance.

[0056] The foregoing has provided a detailed description of the strip coating weight control device provided by the present invention. Specific embodiments have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A strip steel coating weight control device, characterized in that, include: A hot-dip galvanizing tank (1) is fixedly connected to the top of the hot-dip galvanizing tank (1), and a support frame (2) is provided on the support frame (2). The support frame (2) is equipped with a thickness control mechanism, a heat dissipation and dehumidification mechanism and a disassembly and assembly mechanism. The thickness control mechanism includes a hydraulic cylinder (3), a pusher (4), a strip steel placement seat (5), a connecting pipe (6), a jet nozzle (7), an air guide pipe one (8), an air guide pipe two (9), a solenoid valve one (10), a solenoid valve two (11), and a top moving block (19). The hydraulic cylinder (3) is fixedly installed on the top of the support frame (2). The hydraulic rod of the hydraulic cylinder (3) is fixedly connected to the push frame (4). The top of the strip steel placement seat (5) is fixedly connected to the push frame (4). The connecting pipe (6) is fixedly installed on the push frame (4). The jet head (7) is fixedly installed on the connecting pipe (6). The first air guide pipe (8) is fixedly installed on the support frame (2). The first air guide pipe (8) and the connecting pipe (6) are in sliding sealing contact. The second air guide pipe (9) is fixedly installed on the first air guide pipe (8). The first solenoid valve (10) and the second solenoid valve (11) are fixedly installed on the first air guide pipe (8) and the second air guide pipe (9) respectively. The bottom of the jacking block (19) is fixedly connected to the push frame (4).

2. The strip steel coating weight control device according to claim 1, characterized in that, The disassembly and assembly mechanism includes a programmable logic controller (12), a suction cup (13), a conductive tube (14), a vertical tube (15), an inner tube (16), a sleeve plate (17), and a spring (18). The suction cup (13) is fixedly installed at the bottom of the programmable logic controller (12) and is attracted to the support frame (2). The conductive tube (14) is fixedly installed on two suction cups (13). The vertical tube (15) is fixedly installed on the support frame (2). The inner tube (16) is slidably and sealed on the vertical tube (15). The top of the inner tube (16) is closed. Multiple ventilation holes are opened near the top outer side of the inner tube (16). The ventilation holes are located inside the vertical tube (15). The sleeve plate (17) is fixedly sleeved on the outside of the inner tube (16). The spring (18) is fixedly installed between the sleeve plate (17) and the support frame (2).

3. The strip steel coating weight control device according to claim 2, characterized in that, The heat dissipation and dehumidification mechanism includes an air pump (20), a return air pipe (21), a water box (22), a side box (23), a first pipe body (24), a second pipe body (25), absorbent cotton (26), a mesh plate (27), a counterweight (28), and a second mesh plate (29). The air pump (20) is fixedly installed on the top of the programmable logic controller (12), the water box (22) is fixedly installed on the top of the support frame (2), and the return air pipe (21) is fixedly installed on the air pump (20), the water box (22), and the programmable logic controller (12). The side box (23) 23) The first tube (24) is fixedly installed on the programmable logic controller (12). The second tube (25) is fixedly installed between the side box (23) and the programmable logic controller (12). The third tube (27) is fixedly installed between the side box (23) and the air pump (20). The first mesh plate (27) is fixedly installed inside the side box (23). The absorbent cotton (26) is fixedly installed at the bottom of the first mesh plate (27). The top of the counterweight (28) is fixedly connected to the second mesh plate (29). The counterweight (28) is slidably installed on the side box (23) and the support frame (2).

4. The strip steel coating weight control device according to claim 3, characterized in that, The water box (22) has an installation hole, and the right air guide tube (9) is fixedly installed in the installation hole.

5. The strip steel coating weight control device according to claim 3, characterized in that, The bottom of the counterweight (28) is in contact with the jacking block (19).

6. The strip steel coating weight control device according to claim 3, characterized in that, A drain pipe is fixedly installed on the side box (23).

7. The strip steel coating weight control device according to claim 3, characterized in that, The water box (22) contains clean water.

8. The strip steel coating weight control device according to claim 1, characterized in that, The air duct (8) is connected to a hot air blower.

9. The strip steel coating weight control device according to claim 1, characterized in that, The second air duct (9) is connected to a cold air blower.

10. The strip steel coating weight control device according to claim 3, characterized in that, The bottom of the second mesh plate (29) is in contact with the bottom inner wall of the side box (23).

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