A hot-dip galvanizing production process

Abstract

The application discloses a hot-dip galvanizing production process, which comprises the following steps: first, setting a lifting bracket and a plurality of zinc baskets, the lifting bracket being provided with at least two liftable frame holes; second, placing workpieces to be galvanized into empty zinc baskets; third, placing the loaded zinc baskets into the frame holes, controlling the lifting bracket to descend to perform the galvanizing operation, and controlling the lifting bracket to ascend after the galvanizing operation; fourth, moving the lifting bracket transversely, so that a centrifugal machine grabs and lifts one loaded zinc basket to perform a centrifugal operation; fifth, taking the loaded zinc basket after the centrifugal operation; sixth, returning the lifting bracket and the centrifugal machine to the fourth step; a transfer mechanism unloads the workpieces, places empty zinc baskets back into a zinc basket placing area to return to the second step; and the transfer mechanism grabs another loaded zinc basket to return to the third step, so that the circulating galvanizing operation of multiple workstations and multiple zinc baskets can be realized, and the utilization rate of the equipment is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of hot-dip galvanizing equipment, and particularly relates to a hot-dip galvanizing production process. Background Technology

[0002] Hot-dip galvanizing, also known as hot-dip zinc plating, involves immersing the rust-removed workpiece in molten zinc at approximately 500°C, causing a zinc layer to adhere to the surface of the workpiece and thus achieving corrosion protection. Hot-dip galvanizing is an effective method of metal corrosion protection and can be applied to metal structures across various industries.

[0003] Currently, the hot-dip galvanizing process for small workpieces typically involves operators loading the workpieces into zinc baskets, which are then passed through the galvanizing and centrifugal processes according to the galvanizing requirements. This method can only process one basket of workpieces per cycle, with significant time intervals between the galvanizing processes of two baskets, resulting in low efficiency. Therefore, some related technologies separate the galvanizing and centrifugal processes into two separate workstations, each with its own function, using conveyor belts to transfer the zinc baskets and workpieces. However, the inventor believes that this method requires a large amount of space in the workshop and necessitates separate operators and equipment for collecting molten zinc and zinc fumes at each workstation, leading to high costs. Therefore, a new hot-dip galvanizing process needs to be designed.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] The inventors discovered through research that if the galvanizing process and the centrifugation process are placed in two separate workstations, each with its own function, and a conveyor belt is used to transfer the zinc basket and workpieces, this process method can improve the time interval between two cycles of zinc basket galvanizing operations. However, it requires a large amount of workspace in the workshop and also requires operators and equipment for collecting zinc liquid and zinc fumes for each workstation, resulting in higher costs.

[0006] In view of at least one of the above technical problems, this disclosure provides a hot-dip galvanizing production process, the specific technical solution of which is as follows:

[0007] A hot-dip galvanizing production process includes the following steps:

[0008] The first step is to install a lifting bracket that can move horizontally on the surface of the zinc pot above the zinc pot. The lifting bracket has at least two lifting holes. Prepare several zinc baskets, with the number of zinc baskets being at least one more than the number of lifting holes.

[0009] The second step is to place the workpiece to be galvanized into an empty zinc basket in the zinc basket placement area to form a material-carrying zinc basket.

[0010] The third step is to use a transfer mechanism to fill the empty slots of the lifting bracket with the zinc basket. After the slots of the lifting bracket are filled, control the lifting bracket to descend until the workpiece inside the zinc basket is immersed in hot zinc liquid for galvanizing. After galvanizing is completed, control the lifting bracket to rise.

[0011] The fourth step is to move the lifting bracket laterally so that a zinc basket is positioned below the gripping centrifuge. The gripping centrifuge then picks up the zinc basket and lifts it until it is no longer in contact with the frame hole, and then rotates the zinc basket to perform centrifugation.

[0012] Fifth, the transfer mechanism removes the zinc basket loaded with material from the centrifuge after the centrifugation process;

[0013] Step 6: The lifting bracket grabs the centrifuge and returns to step 4; the transfer mechanism unloads the workpiece from the zinc basket into the material collection area, making the zinc basket empty again. The empty zinc basket is then placed back into the zinc basket placement area, returning to step 2; the transfer mechanism grabs another zinc basket in the zinc basket placement area and returns to step 3.

[0014] In some embodiments of this disclosure, the workpiece to be galvanized needs to undergo degreasing, pickling, washing, and drying before the galvanizing operation.

[0015] In some embodiments of this disclosure, the zinc basket placement area is provided with a feeding device, which adds a fixed amount of workpieces to be galvanized to an empty zinc basket.

[0016] In some embodiments of this disclosure, before each galvanizing operation as described in step three, a scraper is used to scrape the surface of the molten zinc in the zinc pot.

[0017] In some embodiments of this disclosure, the translation and lifting of the lifting bracket are each controlled by a servo motor.

[0018] In some embodiments of this disclosure, the transfer mechanism is a robotic arm or a handheld clamp.

[0019] In some embodiments of this disclosure, the side plate of the zinc pot is equipped with a zinc fume collection and exhaust system, which collects and exhausts zinc fumes when they evaporate inside the zinc pot.

[0020] In some embodiments of this disclosure, the material collection area is provided with a material unloading conveyor line, and the transfer mechanism unloads the workpieces from the zinc basket onto the material unloading conveyor line.

[0021] In some embodiments of this disclosure, a table frame is provided above the zinc pot, and the lifting bracket and the gripping centrifuge are all connected to the table frame. A linear track is provided on the ground, and a moving part is provided at the lower end of the table frame to form a sliding pair with the linear track. The moving part is equipped with a locking device.

[0022] In some embodiments of this disclosure, a sludge removal machine is provided on one side of the table frame, and the sludge removal machine needs to be preheated before it can be used.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] By setting up the lifting bracket, a multi-station, multi-zinc-basket cyclic galvanizing operation can be realized, integrating galvanizing and centrifugal operations onto one piece of equipment. Galvanizing and centrifugal operations can be carried out simultaneously, shortening the time interval between two cycles of zinc-basket galvanizing operations. The bracket holes can be used to insert the zinc-baskets during centrifugal operations, improving the utilization rate of the equipment.

[0025] By using a grab-and-grab centrifuge and a multi-frame lifting platform that can be moved horizontally, different technical solutions are provided for hot-dip galvanizing production. This allows those skilled in the art to set up a reciprocating multi-station system on the basis of a zinc pot and centrifuge device to connect the galvanizing process and the centrifugal process, thereby increasing the production capacity of hot-dip galvanizing. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the hot-dip galvanizing production equipment of Embodiment 1 of the present invention;

[0027] Figure 2 This is a three-dimensional schematic diagram of the lifting bracket according to Embodiment 1 of the present invention;

[0028] Figure 3 This is a three-dimensional schematic diagram of the gripping centrifuge according to Embodiment 1 of the present invention;

[0029] Figure 4 This is a three-dimensional schematic diagram of the hot-dip galvanizing production equipment of Embodiment 2 of the present invention;

[0030] The following are the labels in the diagram: 1. Zinc pot; 2. Lifting bracket; 21. Frame hole; 22. Servo motor; 3. Zinc basket; 4. Transfer mechanism; 5. Grab centrifuge; 6. Feeding device; 7. Scraper; 8. Zinc fume collection and exhaust system; 9. Material conveying line; 10. Slag drainer. Detailed Implementation

[0031] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0032] The component numbers used in this document are solely for distinguishing the objects described and have no sequential or technical meaning. The term "connection" in this disclosure, unless otherwise specified, includes both direct and indirect connections. In the description of this application, it should be understood that directional terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for a brief description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] As shown in the attached diagram. Figures 1 to 4 As shown, a hot-dip galvanizing production process is designed, including the following steps:

[0034] The first step is to install a lifting bracket 2 above the zinc pot 1 that can move horizontally on the surface of the zinc pot 1. The lifting bracket 2 has at least two lifting holes 21. Prepare several zinc baskets 3, the number of zinc baskets 3 being at least one more than the number of holes 21.

[0035] The second step is to place the workpiece to be galvanized into an empty zinc basket in the zinc basket placement area to form a material-carrying zinc basket.

[0036] The third step is to use the transfer mechanism 4 to fill the empty frame hole 21 of the lifting bracket. After the frame hole 21 of the lifting bracket 2 is filled, the lifting bracket 2 is controlled to descend until the workpiece inside the zinc basket is immersed in hot zinc liquid for galvanizing. After galvanizing is completed, the lifting bracket 2 is controlled to rise.

[0037] The fourth step is to move the lifting bracket 2 laterally so that a zinc basket is positioned below the gripping centrifuge 5. The gripping centrifuge 5 then grabs and lifts the zinc basket until it is no longer in contact with the bracket hole 21, and then rotates the zinc basket to perform centrifugation.

[0038] Fifth step, the transfer mechanism 4 removes the zinc basket loaded with material after the centrifugation operation from the gripping centrifuge 5;

[0039] Step 6: Lifting bracket 2 grabs centrifuge 5 and returns to step 4; Transfer mechanism 4 unloads the workpiece in the zinc basket into the material collection area, and the zinc basket becomes an empty zinc basket again. The empty zinc basket is placed back in the zinc basket placement area and returns to step 2; Transfer mechanism 4 grabs another zinc basket in the zinc basket placement area and returns to step 3.

[0040] The specific operating procedure is as follows: Zinc pot 1 is filled with molten zinc and preheated to the operating temperature. The lifting bracket 2 is raised using the servo motor 22 responsible for lifting. The workpiece to be galvanized is placed into the first empty zinc basket. A transfer mechanism is used to place the first zinc basket into the first rack hole 21. The workpiece to be galvanized is then placed into the second empty zinc basket. The transfer mechanism is used to place the second zinc basket into the second rack hole 21, and so on, until the rack hole 21 is full. Finally, the lifting bracket 2 is lowered using the lifting servo motor until the zinc basket is filled with molten zinc. After the galvanized workpiece is submerged in molten zinc for hot-dip galvanizing, and the zinc is galvanized to the required level, the lifting servo motor raises the lifting bracket 2. Under the action of the traverse servo motor, the bracket moves in the desired direction until a zinc basket is positioned directly below the gripping centrifuge 5. The gripping centrifuge 5 grips the zinc basket below and lifts it until it is completely out of contact with the lifting bracket 2. Then, the centrifugation process begins, throwing out the molten zinc adhering to the surface of the workpiece and the basket. After centrifugation, the transfer mechanism picks up the workpiece. The zinc basket unloads the workpieces inside into the material collection area. Then, the transfer mechanism grabs another zinc basket in the zinc basket placement area and places it back into a rack hole 21. At the same time, the lifting bracket 2 moves horizontally, placing another zinc basket that has finished galvanizing under the grabbing centrifuge 5. The above steps are repeated for continuous operation, achieving the effect of multiple rack holes 21 and multiple zinc baskets 3 working in a cyclical manner. Through the use of the grabbing centrifuge 5 and the lifting bracket 2, the zinc liquid hanging on the wall of the zinc pot 1 can be centrifuged and thrown out above the zinc pot 1. Different zinc baskets 3 can be galvanized and zinc liquid thrown out separately on this equipment. The equipment layout is compact, which improves the efficiency of hot-dip galvanizing of batches of workpieces to be galvanized and the utilization rate of the equipment. By setting up the grabbing centrifuge 5, the lifting bracket 2 and the zinc pot 1, different technical solutions with different ideas are provided for hot-dip galvanizing production. When those skilled in the art need hot-dip galvanizing operations, they can realize the connection between the galvanizing process and the centrifugal process by setting up a reciprocating moving multi-station in one set of equipment, thereby improving the production capacity.

[0041] In the above embodiments, two examples are listed to implement the above technical solution: Example 1

[0042] like Figures 1 to 3 As shown, this embodiment discloses a hot-dip galvanizing production process, including the following steps:

[0043] The first step is to install a lifting bracket 2 above the zinc pot 1, which can move horizontally on the surface of the zinc pot 1. The lifting bracket 2 has two lifting holes 21, and prepare 5 zinc baskets 3.

[0044] The second step is to place the workpiece to be galvanized into an empty zinc basket in the zinc basket placement area to form a material-carrying zinc basket.

[0045] The third step is to use the transfer mechanism 4 to fill the empty frame hole 21 of the lifting bracket. After the frame hole 21 of the lifting bracket 2 is filled, the lifting bracket 2 is controlled to descend until the workpiece inside the zinc basket is immersed in hot zinc liquid for galvanizing. After galvanizing is completed, the lifting bracket 2 is controlled to rise.

[0046] The fourth step is to move the lifting bracket 2 laterally so that a zinc basket is positioned below the gripping centrifuge 5. The gripping centrifuge 5 then grabs and lifts the zinc basket until it is no longer in contact with the bracket hole 21, and then rotates the zinc basket to perform centrifugation.

[0047] Fifth step, the transfer mechanism 4 removes the zinc basket loaded with material after the centrifugation operation from the gripping centrifuge 5;

[0048] Step 6: Lifting bracket 2 grabs centrifuge 5 and returns to step 4; Transfer mechanism 4 unloads the workpiece in the zinc basket into the material collection area, and the zinc basket becomes an empty zinc basket again. The empty zinc basket is placed back in the zinc basket placement area and returns to step 2; Transfer mechanism 4 grabs another zinc basket in the zinc basket placement area and returns to step 3.

[0049] The workpieces to be galvanized need to undergo degreasing, pickling, washing, and drying before galvanizing. The zinc basket placement area is equipped with a feeding device 6, which adds a fixed amount of workpieces to be galvanized to empty zinc baskets. The quantity of workpieces to be galvanized can be monitored by weighing, allowing for precise setting of galvanizing time and conditions. A table frame is installed above the zinc pot 1, and the lifting bracket 2 and the gripping centrifuge 5 are connected to the table frame. A linear track is provided on the ground, and a moving component forming a sliding pair with the linear track is located at the lower end of the table frame. The moving component is equipped with a locking device. In this embodiment, the moving component... The mechanism can be a slider or a pulley; in this embodiment, a slider is used. The locking device can be a triangular wedge or a limit bolt. The gripping centrifuge 5 is connected to the middle of the table frame. A guide sliding mechanism and a transmission screw are provided between the lifting bracket 2 and the table frame. The transmission screw is linked to a servo motor, and the axis of motion of the guide sliding mechanism is consistent with the axis of the screw. The sliding mechanism is a combination structure of a slider and a slide groove, which makes the lifting bracket 2 more stable when it moves horizontally. The lifting bracket 2 achieves its lifting function through a lifting platform. There are four lifting platforms, which are linked together by a coupling. If the distance is too far... The coupling is connected via a long drive shaft, which can be a long shaft with a toothed disc at one end for use with the coupling. The lifting platform is a rack and pinion type lifting platform, with the rack located on the side of the boom. The lower end of each boom is connected to an edge corner of the lifting bracket 2. The coupling includes a linear coupling and a steering coupling, and synchronous lifting of each lifting platform can be achieved by a lifting servo motor. The bracket 5 has two frame holes 21, which are at the same horizontal level. The frame holes 21 are polygonal or circular; in this embodiment, polygonal holes are used. The upper outer side of the zinc basket 3... The lifting bracket 2 is equipped with a frame plate that matches the frame hole 21; the lifting bracket 2 is also fixed with a ash scraping mechanism, which includes a rotating shaft, an ash scraping rotary motor at the upper end of the rotating shaft, and a ash scraping plate 7 connected to the lower end of the rotating shaft. The ash scraping plate 7 can be used to realize the reciprocating rotation ash scraping function, while ensuring that the ash scraping plate 7 moves synchronously with the lifting bracket 2; the transfer mechanism 4 is a robotic arm or a hand-held clamp, which can be a robotic arm in this embodiment; a material unloading conveying line 9 is provided on one side of the robotic arm. The transfer mechanism 4 unloads the workpieces in the zinc basket onto the material unloading conveying line 9 without manual operation, saving time, labor and effort. Example 2

[0050] like Figure 4As shown, this embodiment discloses a hot-dip galvanizing production process. The difference between this embodiment and Embodiment 2 is that a slag draining machine 10 is provided on the outside of the table frame. During the hot-dip galvanizing production process, a large amount of zinc slag will be generated due to the zinc-iron reaction and settle at the bottom of the zinc pot 1. If it is not cleaned in time, it will inevitably affect the quality of the galvanized workpiece and increase the production cost. The slag draining machine 10 is set on one side of the table frame. When the slag draining machine 10 is needed, the table frame is moved to one side so that the opening of the zinc pot 1 is exposed. After the slag draining machine 10 is preheated, the slag draining operation can be carried out. The preheating temperature of the slag draining machine 10 is above 455°C. In this embodiment, the slag draining machine 25 is provided with a translation track on the outside of the table frame. The slag draining machine 10 is equipped with a lifting device, which can be a lift, and can adapt to a larger slag draining area in the zinc pot 1.

[0051] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A hot-dip galvanizing production process, characterized in that, Includes the following steps: First, a lifting bracket (2) that can move horizontally on the surface of the zinc pot (1) is set above the zinc pot (1). The lifting bracket (2) has at least two liftable frame holes (21). Several zinc baskets (3) are prepared, and the number of zinc baskets (3) is at least one more than the number of frame holes (21). A table frame is set above the zinc pot (1). The lifting bracket (2) and the gripping centrifuge (5) are both connected to the table frame. A linear track is provided on the ground. The lower end of the table frame is provided with a moving part that forms a sliding pair with the linear track. The moving part is equipped with a locking device. The second step is to place the workpiece to be galvanized into an empty zinc basket in the zinc basket placement area to form a material-carrying zinc basket; the zinc basket placement area is equipped with a feeding device (6), and a certain amount of workpiece to be galvanized is added to the empty zinc basket through the feeding device (6); The third step is to use the transfer mechanism (4) to fill the empty frame hole (21) of the lifting bracket. After the frame hole (21) of the lifting bracket (2) is filled, control the lifting bracket (2) to descend until the workpiece inside the zinc basket is immersed in hot zinc liquid for galvanizing. After galvanizing is completed, control the lifting bracket (2) to rise. The fourth step is to move the lifting bracket (2) laterally so that a zinc basket is placed below the grabbing centrifuge (5). The grabbing centrifuge (5) grabs and lifts the zinc basket until it is no longer in contact with the frame hole (21), and then rotates the zinc basket to perform centrifugation. Fifth step, the transfer mechanism (4) removes the zinc basket loaded with material after centrifugation from the gripping centrifuge (5); Step 6: Lifting bracket (2) grabs centrifuge (5) and returns to step 4; Transfer mechanism (4) unloads the workpiece in the zinc basket into the material collection area, and the zinc basket becomes an empty zinc basket again. The empty zinc basket is put back into the zinc basket placement area and returns to step 2; Transfer mechanism (4) grabs another zinc basket in the zinc basket placement area and returns to step 3.

2. The hot-dip galvanizing production process according to claim 1, characterized in that, The workpiece to be galvanized needs to be degreased, pickled, washed, and dried before the galvanizing operation.

3. The hot-dip galvanizing production process according to claim 1, characterized in that, Before each galvanizing operation as described in step 3, use a scraper (7) to scrape the surface of the molten zinc in the zinc pot (1).

4. The hot-dip galvanizing production process according to claim 1, characterized in that, The translation and lifting of the lifting bracket (2) are controlled by a servo motor (22).

5. The hot-dip galvanizing production process according to claim 1, characterized in that, The transfer mechanism (4) is a robotic arm or a handheld clamp.

6. The hot-dip galvanizing production process according to claim 1, characterized in that, The zinc pot (1) is equipped with a zinc fume collection and exhaust system (8) on its side. When zinc fumes are volatilized inside the zinc pot (1), the zinc fumes are collected and discharged through the zinc fume collection and exhaust system (8).

7. The hot-dip galvanizing production process according to claim 1, characterized in that, The material collection area is equipped with a material unloading and conveying line (9), and the transfer mechanism (4) unloads the workpieces in the zinc basket onto the material unloading and conveying line (9).

8. The hot-dip galvanizing production process according to claim 1, characterized in that, A slag remover (10) is provided on one side of the table frame. The slag remover (10) needs to be preheated before it can be used.

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