Molten zinc surface protection device for hot-dip galvanizing process

Abstract

The utility model belongs to the technical field of hot-dip galvanizing processes, and particularly discloses a molten zinc surface protection device for a hot-dip galvanizing process, which comprises a molten zinc pool, a drain valve is arranged on the outer surface of the molten zinc pool, a mounting cover is detachably mounted at the top of the molten zinc pool, a lifting handle is fixedly connected to the top of the mounting cover, and a liquid outlet is formed in the top of the lifting handle. And an open hole is formed in the top of the mounting cover, an adaptive sealing mechanism is arranged above the open hole, and a support is fixedly connected to the top of the molten zinc pool. According to the zinc liquid surface protection device for the hot-dip galvanizing process, a relatively closed environment can be formed in a zinc liquid pool in the hot-dip galvanizing process through an adaptive closing mechanism and a relatively flexible fan-shaped protection plate, and direct contact between zinc liquid and oxygen in air is effectively reduced, so that the oxidation rate of the zinc liquid is greatly reduced, and the service life of the zinc liquid is prolonged. Therefore, the utilization rate of the zinc liquid is increased, zinc slag generated by oxidation is reduced, and the quality of a zinc layer is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hot-dip galvanizing processes, in particular to a zinc liquid surface protection device for a hot-dip galvanizing process. BACKGROUND

[0002] The hot-dip galvanizing process is to immerse a steel product with a cleaned and activated surface in molten zinc liquid, to form a zinc alloy coating with good adhesion on the surface of the steel product through the reaction and diffusion between iron and zinc, so that the molten metal reacts with the iron matrix to form an alloy layer, thereby combining the matrix and the coating.

[0003] At present, in the hot-dip galvanizing process, the steel product is generally directly placed in an open zinc liquid pool for hot-dip galvanizing treatment. However, the zinc liquid surface in the open state is at a high temperature and is prone to react with oxygen in the air, resulting in oxidation of the zinc liquid surface. This oxidation not only reduces the utilization rate of the zinc liquid, but also affects the quality and adhesion of the zinc coating. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the utility model is to solve the defects in the background art, and a zinc liquid surface protection device for a hot-dip galvanizing process is provided to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the utility model provides a zinc liquid surface protection device for a hot-dip galvanizing process, which comprises a zinc liquid pool, the outer surface of the zinc liquid pool is provided with a liquid discharge valve, the top of the zinc liquid pool is detachably provided with a mounting cover, the top of the mounting cover is fixedly connected with a handle, the top of the mounting cover is provided with an opening, the upper side of the opening is provided with an adaptive sealing mechanism, the top of the zinc liquid pool is fixedly connected with a support, and the support is provided with a driving mechanism for gradually immersing the steel product into the zinc liquid pool.

[0006] Preferably, the adaptive sealing mechanism comprises an annular plate fixedly connected to the top of the mounting cover above the opening, and the inner side of the annular plate is fixedly connected with an inner arc shaft. The adaptive sealing mechanism can basically cover the opening at the appropriate time, thereby reducing the consumption of the zinc liquid pool and affecting the quality of the zinc liquid pool after oxidation.

[0007] Preferably, the outer surface of the inner arc shaft is rotatably connected with a fan-shaped protective plate, and the inner side of the annular plate is provided with a plurality of groups of springs, and the bottom end of the spring is fixedly connected with the upper surface of the fan-shaped protective plate.

[0008] Preferably, the driving mechanism comprises an inner screw cylinder rotatably connected to the inner side of the support, and the inner surface of the inner screw cylinder is threadedly sleeved with a screw rod. The driving mechanism can gradually immerse the zinc immersion head carrying the steel product into the zinc liquid pool for hot-dip galvanizing treatment.

[0009] Preferably, a zinc-immersed head is fixedly connected to the bottom of the screw, and a transmission gear is fixedly sleeved on the outer surface of the inner screw.

[0010] Preferably, a motor is fixedly installed on the top of the bracket, and a drive gear is fixedly connected to the output end of the motor, with the outer surface of the drive gear meshing with the outer surface of the transmission gear.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This zinc bath surface protection device for hot-dip galvanizing process, through an adaptive sealing mechanism and a relatively flexible fan-shaped protective plate, allows the zinc bath to form a relatively closed environment during the hot-dip galvanizing process, effectively reducing the direct contact between the zinc bath and oxygen in the air, thereby significantly reducing the oxidation rate of the zinc bath. This not only improves the utilization rate of the zinc bath, but also reduces the zinc dross generated due to oxidation and improves the quality of the zinc layer.

[0013] 2. The zinc bath surface protection device used in the hot-dip galvanizing process can drive the galvanizing head to rotate and move the steel product into the zinc bath for hot-dip galvanizing treatment. The rotation helps to break the oxide layer on the surface of the steel product, making the surface rougher, thereby increasing the contact area and adhesion between the zinc bath and the steel substrate. This enhanced adhesion helps to prevent the galvanized layer from peeling or cracking during subsequent use. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the overall structure of this application;

[0015] Fig. 2 This is a schematic diagram of the surface structure of the annular plate in this application;

[0016] Fig. 3 This is a schematic diagram of the cross-sectional structure of the annular plate in this application.

[0017] The components include: 1. Zinc bath; 2. Drain valve; 3. Mounting cover; 4. Handle; 5. Opening; 6. Annular plate; 7. Inner arc shaft; 8. Fan-shaped protective plate; 9. Spring; 10. Bracket; 11. Inner screw; 12. Screw; 13. Zinc immersion head; 14. Motor; 15. Drive gear; 16. Transmission gear. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Please refer to Figs. 1-3 The utility model provides a zinc liquid surface protection device for hot dip galvanizing process, including zinc liquid pool 1, the outer surface of zinc liquid pool 1 is provided with drainage valve 2, the top of zinc liquid pool 1 is detachably installed with installation cover 3, the top of installation cover 3 is fixedly connected with handle 4, the top of installation cover 3 is equipped with opening 5, opening 5 is provided with two groups, and adaptive closing mechanism is arranged above opening 5, the top of zinc liquid pool 1 is fixedly connected with support 10, and the drive mechanism for carrying steel products gradually immersed in zinc liquid pool 1 is arranged on support 10.

[0020] Through the above technical scheme, the zinc liquid pool 1 contains the high-temperature zinc liquid in the process of using, and the steel product needs to be inserted into the bottom of the zinc dipping head 13 (the bottom of the zinc dipping head 13 is designed with a groove, and the zinc dipping head 13 is made of rubber product and has a certain elastic deformation capacity, so that the steel product can be tightly clamped therein), and the drive mechanism can carry the steel product to gradually immerse into the zinc liquid pool 1 for hot dip galvanizing treatment. In this process, the adaptive closing mechanism can cover the opening 5 to reduce the oxidation of the zinc liquid.

[0021] Specifically, the adaptive closing mechanism includes a ring plate 6 fixedly connected to the top of the installation cover 3 above the opening 5, and an inner arc shaft 7 fixedly connected to the inner side of the ring plate 6.

[0022] Through the above technical scheme, the inner arc shaft 7 on the inner side of the ring plate 6 is provided with four groups, which are evenly and symmetrically distributed in the ring plate 6, and the related fan-shaped protective plates 8 are also provided with four groups.

[0023] Specifically, the outer surface of the inner arc shaft 7 is rotatably connected with the fan-shaped protective plate 8, and the inner side of the ring plate 6 is provided with a plurality of spring groups 9, and the bottom end of the spring 9 is fixedly connected with the upper surface of the fan-shaped protective plate 8.

[0024] Through the above technical scheme, each group of fan-shaped protective plates 8 is elastically supported by two springs 9, and the spring 9 is designed to be inclined. The four groups of fan-shaped protective plates 8 can cooperate to cover the lower opening 5, and the four groups of fan-shaped protective plates 8 near the axis of the ring plate 6 are all designed to be arc-shaped, which is convenient for the steel product (columnar) to pass through.

[0025] Specifically, the drive mechanism includes an inner screw cylinder 11 rotatably connected to the inner side of the support 10, and a screw rod 12 threadedly connected to the inner surface of the inner screw cylinder 11.

[0026] Through the above technical scheme, the inner screw cylinder 11 can rotate on the inner side of the support 10, and the screw rod 12 passing through the inner screw cylinder 11 will move up and down during rotation.

[0027] Specifically, a zinc-immersed head 13 is fixedly connected to the bottom of the screw 12, and a transmission gear 16 is fixedly sleeved on the outer surface of the inner screw 11.

[0028] With the above technical solution, the zinc immersion head 13 is made of rubber, which allows a cylindrical steel product of a fixed size to be precisely and tightly embedded in the zinc immersion head 13, while the steel product part outside the zinc immersion head 13 is used for hot-dip galvanizing.

[0029] Specifically, a motor 14 is fixedly installed on the top of the bracket 10, and a drive gear 15 is fixedly connected to the output end of the motor 14. The outer surface of the drive gear 15 meshes with the outer surface of the transmission gear 16.

[0030] Through the above technical solution, the motor 14 can drive the drive gear 15 to rotate after it is turned on. During this process, the drive gear 15 can rotate synchronously with the two sets of transmission gears 16 connected to it.

[0031] Working principle: when the device is in use, first pull the handle 4 to take off the installation cover 3 from the zinc liquid pool 1 (at this time the zinc immersion head 13 is located at a relatively high position, which will not affect the installation and removal of the installation cover 3), then inject high-temperature zinc liquid into the zinc liquid pool 1, then reinstall the installation cover 3, insert the fixed specification cylindrical steel product into the groove at the bottom of the zinc immersion head 13, at this time the steel product can be embedded relatively tightly (at this time the part of the steel product used for hot galvanizing is exposed and has a certain distance from the zinc immersion head 13), then start the motor 14 to drive the driving gear 15 to rotate, in this process, the driving gear 15 will be linked with the two sets of transmission gears 16 engaged with it to rotate synchronously, and then the transmission gears 16 drive the corresponding inner screw cylinder 11 to rotate, in the process of the inner screw cylinder 11 rotating inside the support 10, the screw rod 12 inside it connected with it will rotate while gradually moving down (the screw rod 12 is movably arranged through the support 10), thereby linking the zinc immersion head 13 to gradually move down, during which the zinc immersion head 13 will abut against the parts of each sector-shaped protective plate 8 close to the axis of the ring-shaped plate 6, thereby pushing the sector-shaped protective plate 8 to swing along the inner arc shaft 7, and the spring 9 will be stretched synchronously, the parts of the four sector-shaped protective plates 8 close to the axis of the ring-shaped plate 6 will gradually move away during the swinging process, until the zinc immersion head 13 completely passes through the opening 5 and enters the zinc liquid pool 1, thereby performing hot dip galvanizing treatment on the steel product at the bottom of the zinc immersion head 13, the zinc immersion head 13 carrying the steel product is rotated and moved down to enter the zinc liquid pool 1 for hot dip galvanizing treatment, which helps to break the oxide layer on the surface of the steel product, making the surface rougher, thereby increasing the contact area and bonding force between the zinc liquid and the steel base material, in this process, when the zinc immersion head 13 no longer pushes against the sector-shaped protective plate 8, therefore under the elastic resetting action of the spring 9, it will pull the sector-shaped protective plate 8 to swing in the opposite direction along the inner arc shaft 7 (compared with the swinging direction of the sector-shaped protective plate 8 when the zinc immersion head 13 moves down against it), until the four sector-shaped protective plates 8 are in a horizontal state, at this time the space between the parts of the sector-shaped protective plates 8 close to each other can just accommodate the screw rod 12 passing through, that is, the four sector-shaped protective plates 8 play a role in closing the opening 5 in the process of cooperating with each other, which has a relatively closed effect on the zinc liquid pool 1, thereby effectively reducing the oxidation consumption of the zinc liquid in the zinc liquid pool 1, and after completing the hot dip galvanizing, in the process of moving up the zinc immersion head 13, similarly, the parts of the four sector-shaped protective plates 8 close to the axis of the ring-shaped plate 6 will gradually tilt upwards (due to the swinging of the sector-shaped protective plate 8 along the inner arc shaft 7), until the zinc immersion head 13 no longer abuts against the sector-shaped protective plate 8 from bottom to top (i.e. the sector-shaped protective plate 8 completely leaves / does not contact it), under the elastic resetting action of the spring 9, each sector-shaped protective plate 8 will be in a horizontal state, ready for the subsequent insertion of the steel product into the zinc liquid pool 1 for hot galvanizing, which has a relatively closed effect on the surface of the zinc liquid in the zinc liquid pool 1, after the zinc liquid pool 1 is no longer used, the drain valve 2 can be opened to drain the zinc liquid.

[0032] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. A zinc bath surface protection device for hot-dip galvanizing process, comprising a zinc bath (1), characterized in that: The outer surface of the zinc liquid tank (1) is provided with a drain valve (2). The top of the zinc liquid tank (1) is detachably installed with an installation cover (3). The top of the installation cover (3) is fixedly connected with a handle (4). The top of the installation cover (3) is provided with an opening (5). An adaptive sealing mechanism is provided above the opening (5). The top of the zinc liquid tank (1) is fixedly connected with a bracket (10). The bracket (10) is provided with a drive mechanism for carrying steel products into the zinc liquid tank (1) gradually.

2. The zinc bath surface protection device for hot-dip galvanizing process according to claim 1, characterized in that: The adaptive closure mechanism includes an annular plate (6) fixedly connected to the top of the mounting cover (3) above the opening (5), and an inner arc shaft (7) is fixedly connected to the inner side of the annular plate (6).

3. A zinc bath surface protection device for hot-dip galvanizing process according to claim 2, characterized in that: The outer surface of the inner arc shaft (7) is rotatably connected to a fan-shaped protective plate (8), and the inner side of the annular plate (6) is provided with several sets of springs (9), and the bottom end of the springs (9) is fixedly connected to the upper surface of the fan-shaped protective plate (8).

4. A zinc bath surface protection device for hot-dip galvanizing process according to claim 1, characterized in that: The driving mechanism includes an inner screw cylinder (11) rotatably connected to the inside of the bracket (10), and a screw (12) is threaded onto the inner surface of the inner screw cylinder (11).

5. A zinc bath surface protection device for hot-dip galvanizing process according to claim 4, characterized in that: The bottom of the screw (12) is fixedly connected to a zinc-immersed head (13), and a transmission gear (16) is fixedly sleeved on the outer surface of the inner screw (11).

6. A zinc bath surface protection device for hot-dip galvanizing process according to claim 5, characterized in that: A motor (14) is fixedly installed on the top of the bracket (10). The output end of the motor (14) is fixedly connected to a drive gear (15), and the outer surface of the drive gear (15) meshes with the outer surface of the transmission gear (16).

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