An automatic continuous passivation tank for galvanized steel strip

Abstract

This utility model belongs to the technical field of material passivation devices and discloses an automatic continuous passivation tank for galvanized steel strip, including a high-gravity rotating bed. The top and interior of the high-gravity rotating bed are respectively set as a liquid inlet area and a conveying area. The surface of the high-gravity rotating bed is respectively provided with a feed trough and a discharge trough. A galvanized steel strip body is rotatably connected inside the high-gravity rotating bed. The surface of the galvanized steel strip body is connected to the feed trough and discharge trough of the high-gravity rotating bed. The galvanized steel strip body is placed inside the high-gravity rotating bed. As the galvanized steel strip body rotates inside the high-gravity rotating bed, passivation liquid is sprayed onto the surface of the galvanized steel strip body through an L-shaped metal wire mesh and sprayed onto the surface of the galvanized steel strip body through the discharge trough on the surface of the spray pipe. Through the above solution, the problems of poor passivation effect and large subsequent pollution during the passivation process of metal material passivation in the automatic liquid-changing uniform passivation tank are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of material passivation devices, specifically an automatic continuous passivation tank for galvanized steel strip. Background Technology

[0002] Passivation is a process in which metal is treated in a solution of nitrite, nitrate, chromate or dichromate to form a chromate passivation film on the metal surface. Typically, the metal material is placed inside the passivation teeth, and a passivation film is formed on the surface of the steel strip through chemical or electrochemical methods to improve its corrosion resistance, adhesion and appearance quality.

[0003] Meanwhile, patent application number 201921535141.8 discloses an automatic liquid-changing uniform passivation tank for pre-treatment of aluminum profile polishing, including a shell, a base at the bottom of the shell, a substrate at the top of the base, a passivation tank at the top of the substrate, a liquid outlet pipe at the top of the passivation tank, an electromagnetic flow meter on one side of the liquid outlet pipe, and a replenishment tank on the side of the liquid outlet pipe away from the electromagnetic flow meter. Beneficial effect: By providing cooperating connecting rods one and two on the base, automatic liquid replacement is achieved when passivating another batch of aluminum materials after the liquid has been drained.

[0004] However, during the implementation of the relevant technology, it was found that the passivation pool for automatic liquid replacement and uniform passivation in the pretreatment of aluminum profile polishing had poor passivation effect and significant subsequent pollution problems during the passivation process of metal materials. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an automatic continuous passivation tank for galvanized steel strip, which has the advantages of good passivation effect, collection and reuse of pollutants, and compliance with the path of continuous, efficient and sustainable development.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic continuous passivation tank for galvanized steel strip, comprising a high-gravity rotating bed, wherein the top and interior of the high-gravity rotating bed are respectively configured as an inlet area and a conveying area, a top cover is fixedly connected to the top of the high-gravity rotating bed, and a feed trough and a discharge trough are respectively opened on the surface of the high-gravity rotating bed, and a galvanized steel strip body is rotatably connected inside the high-gravity rotating bed, wherein the surface of the galvanized steel strip body is respectively connected through the feed trough and the discharge trough of the high-gravity rotating bed; The inner cavity of the high-gravity rotating bed, i.e., the transmission area, is rotatably connected to a spray pipe. The surface of the spray pipe has an opening downward-facing liquid outlet groove. The galvanized steel strip body is located at the bottom end of the liquid outlet groove of the spray pipe. A rotating shaft is installed inside the galvanized steel strip body. An inlet connector is slidably connected inside the rotating shaft. A sponge is fixedly connected to the bottom end of the inlet connector. A porous cylinder is sleeved on the outside of the sponge. The porous cylinder is fixed inside the rotating shaft. L-shaped metal wire meshes are fixedly connected to both sides of the circular groove of the porous cylinder. Several sets of L-shaped metal wire meshes are arranged in a ring array and fixed on the surface of the porous cylinder. The L-shaped metal wire meshes rotate in the inner cavity of the high-gravity rotating bed.

[0007] Preferably, a protective shell is fixedly connected to the surface of the high-gravity rotating bed, and a motor is provided at the top of the protective shell. The output end of the motor passes through the inner cavity of the protective shell and is fixedly connected to a rotating drum. The surface of the rotating drum is rotatably connected to the surface of the galvanized steel strip body.

[0008] Preferably, a reinforcing rod is provided between the high-gravity rotating bed and the protective shell. An automatic tensioner is fixedly connected to the top end of the reinforcing rod, and a fixing rod is rotatably connected to the other end of the automatic tensioner. A roller is rotatably connected to the bottom end of the fixing rod. The roller is located between the high-gravity rotating bed and the protective shell and is attached to the surface of the galvanized steel strip body.

[0009] Preferably, a support frame is fixedly connected to the top of the cover. The support frame is configured in two layers. The two sides of the cover are respectively configured as a purification area and a chemical area from top to bottom. A water storage tank is fixedly connected inside the purification area of ​​the cover. A valve is sleeved on the surface of the liquid outlet end of the water storage tank. The output end of the water storage tank passes through the interior of the support frame and is connected to a passivation liquid tank. The passivation liquid tank is located in the chemical area of ​​the cover.

[0010] Preferably, the surface of the passivation liquid tank is provided with inlet and outlet holes, the outlet hole of the passivation liquid tank is connected to an outlet pipe, the outlet pipe passes through one side of the support frame, and the inlet hole of the passivation liquid tank is connected to a U-shaped pipe.

[0011] Preferably, a water pump is fitted onto the surface of the U-shaped tube, one side of the water pump is fixedly connected to the surface of the support frame, and the other end of the U-shaped tube is connected to the surface of the high-gravity rotating bed.

[0012] Preferably, the outlet end of the passivation liquid tank penetrates the surface of the upper cover and communicates with the top end of the spray pipe, and the passivation liquid tank is also fitted with a valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model changes the traditional structure of immersing the galvanized steel strip in a passivation tank, which requires the galvanized steel strip to be continuously placed in and lifted. This passive passivation process is inefficient. Instead, a rotating structure is used, placing the galvanized steel strip inside a high-gravity rotating bed. As the galvanized steel strip rotates inside the bed, passivation liquid is sprayed onto the surface of the galvanized steel strip through an L-shaped wire mesh and sprayed onto the surface of the galvanized steel strip through a liquid outlet groove on the surface of the spray pipe. This high-gravity rotating bed structure saves space and requires no manual operation.

[0014] 2. This utility model divides the passivation device into two groups of areas. A U-shaped tube connects the liquid inlet area and the conveying area, allowing the passivation liquid inside the high-gravity rotating bed to be re-drawn into the passivation liquid tank for processing. After processing, the passivation liquid flows out of the high-gravity rotating bed again to participate in the passivation of the galvanized steel strip body. Then, the passivation liquid tank is placed at the bottom of the water storage tank, and water is drained from the water storage tank to the passivation liquid tank to remove impurities and allow clean water to flow into the high-gravity rotating bed. Under the action of thermal expansion and contraction, the impurities on the inner wall of the high-gravity rotating bed are agglomerated, which facilitates the cleaning of the inner wall of the high-gravity rotating bed and improves the passivation effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the supergravity rotating bed of this utility model; Figure 3 This is a schematic diagram of the galvanized steel strip body of this utility model on a high-gravity rotating bed; Figure 4 This is a schematic diagram of the structure of the water storage tank and passivation liquid tank of this utility model; Figure 5 This is a cross-sectional view of the supergravity rotating bed of this utility model. Figure 6 This is an enlarged structural schematic diagram of the supergravity rotating bed of this utility model.

[0016] In the diagram: 1. High-gravity rotating bed; 2. Top cover; 21. Support frame; 22. Water storage tank; 23. Valve; 24. Passivation liquid tank; 25. Water pump; 26. U-shaped tube; 27. Liquid outlet pipe; 3. Protective shell; 31. Roller; 32. Automatic tensioner; 33. Reinforcing rod; 34. Fixing rod; 35. Rotating drum; 36. Motor 1; 4. Galvanized steel strip body; 5. Spray pipe; 6. Rotating shaft; 61. Liquid inlet connector; 62. Sponge; 63. Perforated cylinder; 64. L-shaped metal wire mesh; 7. Motor 2. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 6 As shown, this utility model provides an automatic continuous passivation tank for galvanized steel strip, including a gravity rotating bed 1. The top and interior of the gravity rotating bed 1 are respectively set as an inlet area and a conveying area. A top cover 2 is fixedly connected to the top of the gravity rotating bed 1. A feed trough and a discharge trough are respectively opened on the surface of the gravity rotating bed 1. A galvanized steel strip body 4 is rotatably connected inside the gravity rotating bed 1. The surface of the galvanized steel strip body 4 is respectively penetrated through the feed trough and discharge trough of the gravity rotating bed 1. The inner cavity of the high-gravity rotating bed 1, i.e., the transmission area, is rotatably connected to a spray pipe 5. The surface of the spray pipe 5 has an opening-downward-facing outlet groove. A galvanized steel strip body 4 is located at the bottom of the outlet groove of the spray pipe 5. A rotating shaft 6 is installed inside the galvanized steel strip body 4, and an inlet connector 61 is slidably connected inside the rotating shaft 6. A sponge 62 is fixedly connected to the bottom end of the inlet connector 61. The sponge 62 is used to absorb the passivation liquid for subsequent passivation of the surface of the galvanized steel strip body 4. A sleeve is fitted on the outside of the sponge 62. A porous cylinder 63 is fixed inside the rotating shaft 6. L-shaped metal wire mesh 64 is fixedly connected to both sides of the circular groove of the porous cylinder 63. Several sets of L-shaped metal wire mesh 64 are arranged in a ring array and fixed on the surface of the porous cylinder 63. When the L-shaped metal wire mesh 64 is set, the liquid discharged from the porous cylinder 63 passes through the L-shaped metal wire mesh 64 and throws the passivation liquid toward the inner wall of the high gravity rotating bed 1. By controlling the rotation speed, the passivation liquid impacts the surface of the galvanized steel strip body 4 to form a laminar liquid film.

[0019] Specifically, a protective shell 3 is fixedly connected to the surface of the supergravity rotating bed 1. A motor 36 is installed at the top of the protective shell 3. The output end of the motor 36 passes through the inner cavity of the protective shell 3 and is fixedly connected to a rotating drum 35. The rotating drum 35 drives the galvanized steel belt body 4 to rotate inside the protective shell 3.

[0020] Furthermore, a reinforcing rod 33 is provided between the high-gravity rotating bed 1 and the protective shell 3. An automatic tensioner 32 is fixedly connected to the top of the reinforcing rod 33. The automatic tensioner 32 is used to press against the surface of the galvanized steel strip body 4 during the sliding process inside the high-gravity rotating bed 1. During the sliding process, the galvanized steel strip body 4 provides a certain tension. A fixing rod 34 is rotatably connected to the other end of the automatic tensioner 32. A roller 31 is rotatably connected to the bottom end of the fixing rod 34. The roller 31 is located between the high-gravity rotating bed 1 and the protective shell 3 and is used to fit against the surface of the galvanized steel strip body 4. During the sliding process, the automatic tensioner 32, together with the fixing rod 34, can press against the galvanized steel strip body 4 that is shaking.

[0021] Furthermore, a support frame 21 is fixedly connected to the top of the cover 2. The support frame 21 is configured in two layers. The two sides of the cover 2 are respectively configured as a purification area and a chemical area from top to bottom. With this structure, after the passivation of the galvanized steel strip body 4 is completed, the water flowing out from the water storage tank 22 flows to the passivation liquid tank 24 and the inner wall of the high gravity rotating bed 1 to rinse the inside of the passivation liquid tank 24, preventing any mixture from adhering to the inner wall of the passivation liquid tank 24. A valve 23 is fitted on the surface of the liquid outlet of the water storage tank 22 to control the drainage properly.

[0022] It is worth noting that the passivation liquid tank 24 has inlet and outlet holes on its surface. The outlet hole of the passivation liquid tank 24 is connected to an outlet pipe 27, which passes through one side of the support frame 21. The inlet hole of the passivation liquid tank 24 is connected to a U-shaped pipe 26.

[0023] It is worth noting that a water pump 25 is fitted on the surface of the U-shaped tube 26. One side of the water pump 25 is fixedly connected to the surface of the support frame 21, and the other end of the U-shaped tube 26 is connected to the surface of the high gravity rotating bed 1. When the passivation liquid inside the high gravity rotating bed 1 has a poor passivation effect after long-term use, it needs to be treated with passivation liquid. The water pump 25 draws the passivation liquid inside the high gravity rotating bed 1 into the passivation liquid tank 24, mixes it with the solution inside the passivation liquid tank 24, and then discharges it back into the interior of the high gravity rotating bed 1 for continued use.

[0024] It is worth mentioning that the passivation liquid flowing out from the outlet end of the passivation liquid tank 24 penetrates the surface of the upper cover 2 and is connected to the top of the spray pipe 5. The spray pipe 5 flows out from the center to several sets of drainage grooves around the surface. The passivation liquid tank 24 is also equipped with a valve 23, which controls the flow rate of the passivation liquid inside the passivation liquid tank 24.

[0025] Among them, motor 36, galvanized steel strip body 4, and motor 7 are existing technologies and will not be described in detail; at the same time, this utility model also includes power supply, controller, and switch, etc., which are not the main technical points of this patent and will not be described in detail; the "front, back, left, and right" perspectives of this device are as follows: Figure 1 The direction shown in the diagram is the reference.

[0026] Working principle: One end of the galvanized steel strip body 4 passes through the feed chute on the surface of the high gravity rotating bed 1 and is pulled out from the discharge chute of the high gravity rotating bed 1. The galvanized steel strip body 4 pulled out from the discharge chute is wrapped around the surface of the rotating drum 35. The passivation liquid tank 24 in the chemical area of ​​the upper cover 2 is started. The liquid inside the passivation liquid tank 24 is connected to the interface of the spray pipe 5 through the inside of the high gravity rotating bed 1. The liquid flows from the inside of the spray pipe 5 to the inlet connector 61. During the flow, the liquid wets the surface of the sponge 62 and keeps the sponge 62 saturated. Simultaneously, motor 7 and motor 36 are started. Motor 7 controls the rotating shaft 6 to rotate, and motor 36 controls the rotating drum 35 to rotate. During the rotation of the rotating drum 35, the galvanized steel strip body 4 slides on the surface of the high-gravity rotating bed 1. In conjunction with the passivation liquid being sprayed onto the surface of the galvanized steel strip body 4, the rotating shaft 6, under the action of centrifugal force, throws the liquid out from the inside of the sponge 62 to the outside. During the throwing process, the liquid is sprayed out through the porous cylinder 63 to form a laminar liquid film. In order to avoid uneven passivation of the surface of the galvanized steel strip body 4 caused by "air film obstruction" in the traditional process, the speed of motor 7 is increased, and the spray pipe 5 is started to spray onto the surface of the galvanized steel strip body 4. In conjunction with the passivation liquid discharged from the porous cylinder 63 to the outside of the L-shaped metal wire mesh 64, it is sprayed through the atomizing nozzle. The passivation liquid forms a nanoscale liquid film that fully contacts the surface of the galvanized steel strip body 4. As the galvanized steel strip body 4 slides outward, the passivation liquid inside the high gravity rotating bed 1 reacts chemically with the galvanized steel strip body 4, producing chloride ions. As the number of impurity ions increases, the conductivity increases, requiring treatment of the passivation liquid inside the high gravity rotating bed 1. A portion of the passivation liquid in the core of the high gravity rotating bed 1 is drawn by the water pump 25 and transferred to the inside of the passivation liquid tank 24. An agent for acid-base neutralization is added to the inside of the passivation liquid tank 24 to restore the passivation liquid inside the tank 24 to its original conductivity value. The liquid is then flushed out of the high gravity rotating bed 1. The neutralized impurities are discharged outward through the outlet pipe 27, which is connected to the passivation liquid tank 24. After the passivation of the galvanized steel strip body 4 is completed, the water inside the water storage tank 22 flows into the passivation liquid tank 24 and into the interior of the high gravity rotating bed 1, where it combines with the impurities on the inner wall of the high gravity rotating bed 1 and lowers the temperature inside the high gravity rotating bed 1. The passivation slag is then removed by utilizing the thermal expansion and contraction effect, thus completing the cleaning of the passivation liquid tank 24 and its inner wall.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic continuous passivation cell for galvanized steel strip comprising a supergravity rotating bed (1), characterized in that: The top and interior of the supergravity rotating bed (1) are respectively set as a liquid inlet area and a conveying area. The top of the supergravity rotating bed (1) is fixedly connected to a top cover (2). The surface of the supergravity rotating bed (1) is respectively provided with a feed trough and a discharge trough. The interior of the supergravity rotating bed (1) is rotatably connected to a galvanized steel strip body (4). The surface of the galvanized steel strip body (4) is respectively connected to the feed trough and the discharge trough of the supergravity rotating bed (1). The inner cavity of the high-gravity rotating bed (1), which is also the transmission area, is rotatably connected to a spray pipe (5). The surface of the spray pipe (5) has a downward-facing outlet groove. The galvanized steel strip body (4) is located at the bottom of the outlet groove of the spray pipe (5). A rotating shaft (6) is installed inside the galvanized steel strip body (4). A motor (7) is installed at the bottom of the rotating shaft (6). An inlet connector (61) is slidably connected inside the rotating shaft (6). 1) A sponge (62) is fixedly connected to the bottom end. A porous cylinder (63) is sleeved on the outside of the sponge (62). The porous cylinder (63) is fixed inside the rotating shaft (6). L-shaped metal wire mesh (64) is fixedly connected to both sides of the circular slot of the porous cylinder (63). Several sets of L-shaped metal wire mesh (64) are arranged in a ring array and fixed on the surface of the porous cylinder (63). The L-shaped metal wire mesh (64) rotates in the inner cavity of the high gravity rotating bed (1).

2. An automatic continuous passivation tank for galvanized strip steel according to claim 1, characterized in that: The surface of the supergravity rotating bed (1) is fixedly connected to a protective shell (3). A motor (36) is provided at the top of the protective shell (3). The output end of the motor (36) passes through the inner cavity of the protective shell (3) and is fixedly connected to a rotating drum (35). The surface of the rotating drum (35) is rotatably connected to the surface of the galvanized steel strip body (4).

3. An automatic continuous passivation tank for galvanized strip steel according to claim 2, characterized in that: A reinforcing rod (33) is provided between the supergravity rotating bed (1) and the protective shell (3). An automatic tensioner (32) is fixedly connected to the top end of the reinforcing rod (33). A fixing rod (34) is rotatably connected to the other end of the automatic tensioner (32). A roller (31) is rotatably connected to the bottom end of the fixing rod (34). The roller (31) is located between the supergravity rotating bed (1) and the protective shell (3) and is attached to the surface of the galvanized steel strip body (4).

4. The automatic continuous passivation tank for galvanized strip steel of claim 1, characterized in that: The top of the cover (2) is fixedly connected to a support frame (21). The support frame (21) is configured in two layers. The two sides of the cover (2) are respectively configured as a purification area and a chemical area from top to bottom. A water storage tank (22) is fixedly connected inside the purification area of ​​the cover (2). A valve (23) is sleeved on the surface of the liquid outlet end of the water storage tank (22). The output end of the water storage tank (22) passes through the interior of the support frame (21) and is connected to a passivation liquid tank (24). The passivation liquid tank (24) is located in the chemical area of ​​the cover (2).

5. An automatic continuous passivation tank for galvanized strip steel according to claim 4, characterized in that: The passivation liquid tank (24) has inlet and outlet holes on its surface. The outlet hole of the passivation liquid tank (24) is connected to an outlet pipe (27), which passes through one side of the support frame (21). The inlet hole of the passivation liquid tank (24) is connected to a U-shaped pipe (26).

6. An automatic continuous passivation tank for galvanized strip steel according to claim 5, characterized in that: A water pump (25) is fitted onto the surface of the U-shaped tube (26). One side of the water pump (25) is fixedly connected to the surface of the support frame (21), and the other end of the U-shaped tube (26) is connected to the surface of the supergravity rotating bed (1).

7. An automatic continuous passivation tank for galvanized strip steel according to claim 5, characterized in that: The outlet end of the passivation liquid tank (24) penetrates the surface of the upper cover (2) and communicates with the top of the spray pipe (5). The passivation liquid tank (24) is also fitted with a valve (23).

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