Continuous pickling device and method for hot galvanizing of metal parts

Abstract

The invention relates to the technical field of hot galvanizing pickling, and provides a continuous pickling device and method for hot galvanizing of metal parts. A pickling chamber of the pickling tank is provided with a first-stage pickling cavity and a second-stage pickling cavity which are adjacent to each other and are separated by a middle partition wall, and the internal composition structures of the first-stage pickling cavity and the second-stage pickling cavity are the same; storage boxes are installed at the front end and the rear end of the pickling tank, through grooves are formed in the front end and the rear end of the pickling tank and communicate with the first-stage pickling cavity and the second-stage pickling cavity, a filter frame is vertically and movably installed in the first-stage pickling cavity, a lifting table is installed above the front end and the rear end of the pickling tank, and pull ropes are slidably installed at the two ends of the lifting table. According to the method, the effects of thick rust removal and fine washing leakage checking and vacancy filling are achieved in a continuous pickling mode, fallen impurities are intercepted, cleared and collected in the period, the cleanliness of pickling liquid is maintained, the method is suitable for being used for multi-batch pickling operation, meanwhile, the liquid changing and dredging frequency is reduced, and the production cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot-dip galvanizing and pickling, and more specifically, to a device and method for continuous pickling of hot-dip galvanized metal parts. Background Art

[0002] Hot-dip galvanizing continuous pickling of metal parts refers to the use of acid solution to remove the dense layer of iron oxide and rust formed on the surface of the steel during rolling, storage and transportation before the metal parts (usually steel strips, steel wires, steel pipes or steel sections) enter the galvanizing pot on the continuous hot-dip galvanizing production line. The surface of the metal parts after pickling is a clean and active pure iron surface, which is an absolute prerequisite for the subsequent molten zinc to be able to well infiltrate and diffuse and form a zinc-iron alloy layer with good bonding strength (galvanized layer); At present, in actual applications, it is found that metal parts enter the next process directly after pickling once. However, for some metal parts with severe rust, one pickling cannot directly achieve the expected effect. The residual rust forms a barrier layer, resulting in "missing plating" in the subsequent process. In order to solve the above problems, the present application proposes a device and method for continuous pickling of hot-dip galvanized metal parts. Summary of the Invention

[0003] The object of the present invention is to provide a device and method for continuous pickling of hot-dip galvanized metal parts, so as to solve the problem of plating leakage caused by insufficient pickling in the above-mentioned background technology.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: A device and method for continuous pickling of hot-dip galvanized metal parts: comprising a pickling tank; The pickling chamber of the pickling tank comprises an adjacent primary pickling chamber and a secondary pickling chamber, which are separated by a partition wall in the middle, and the internal components and structures of the primary pickling chamber and the secondary pickling chamber are the same; Storage boxes are installed at the front and rear ends of the pickling tank. Through slots are opened at the front and rear ends of the pickling tank to connect the primary pickling chamber and the secondary pickling chamber. A filter rack is installed inside the primary pickling chamber so that it can move up and down. A lifting platform is installed above the front and rear ends of the pickling tank. Pull ropes are slidably installed at both ends of the lifting platform, and their movable ends are connected to the filter racks. A cleaning rack is movably installed inside the upper end of the primary pickling chamber.

[0005] As a further optimization of the present invention, bosses are raised upward on the left and right sides of the filter frame, and guide edges are provided on opposite surfaces of adjacent bosses, and the bosses are fixedly connected to the pull rope.

[0006] As a further optimization of the present invention, a rotating shaft is rotatably installed on the outer side of the lifting platform, and detail shafts extend from both ends of the rotating shaft, and a tapered shaft is fixed to one end of the detail shaft.

[0007] As a further optimization of the present invention, one end of the pull rope is connected to one end of the detail shaft adjacent to the rotating shaft.

[0008] As a further optimization of the present invention, scrapers extend from the front and rear sides of the cleaning frame to scrape impurities on the surface of the filter frame. A cavity is provided below the cleaning frame with a built-in vibrating part.

[0009] As a further optimization of the present invention, the cleaning frame is slidably connected to the guide rod through a slider 1 at one end, and the cleaning frame is fixedly connected to a transmission rope through a slider 2 at the other end.

[0010] As a further optimization of the present invention, the transmission rope forms a rotary structure around one side wall of the pickling tank, and a fixing frame is fixed to the outer side of the side wall of the pickling tank for passing the transmission rope.

[0011] As a further optimization of the present invention, a stop is provided at the upper end of the through groove extending toward the interior of the pickling tank, for supporting the boss to limit the rising height.

[0012] As a further optimization of the present invention, when the filter support rises to the highest point, the scraper is in contact with the upper surface of the filter support, and the guide edge is used to prevent impurities from moving to both sides to avoid the scraper.

[0013] A pickling method, the specific steps are as follows: S1, the initial pickling stage, the metal parts are placed in the first pickling chamber with high acid concentration by the crane and the crane of the production line for the first pickling. After pickling, the metal parts are lifted and allowed to stand for leachate; S2, cleaning stage, as the metal parts are hoisted, the shaft rotates to reel in the draw rope, thereby pulling up the filter frame to make it rise, and the stop platform presses against the boss to form a position; S21, driving the transmission rope to move in a circular motion, driving the cleaning frame to slide in the front-back direction, thereby using the scraper to scrape off impurities on the surface of the filter frame and push the impurities into the through groove to be stored in the storage box; S22. During the sliding of the cleaning frame, the built-in vibration unit drives the vibration part to hammer the filter frame to shake out the impurities in the mesh; S3. After draining, the metal parts are placed in a secondary pickling chamber with low acid concentration for secondary pickling, and then S2 is repeated.

[0014] Beneficial effects of the present invention: The present invention adopts a dual-chamber arrangement of the pickling tank, which can perform double pickling on metal parts by using high-concentration acid to remove thick rust and low-concentration acid to break and activate the metal parts. This can not only ensure that the metal parts are fully pickled and avoid residual rust, but also extend the service life of the pickling solution in a single pickling chamber and reduce the overall acid change frequency. Furthermore, when the metal parts are transferred between the two chambers, the filter frame rises up and the impurities intercepted by it are cleaned by the cleaning frame and pushed into the storage box for collection. After this arrangement, the cleanliness of the pickling liquid in the tank can be maintained for a long time, and the frequency of production suspension and silt removal is reduced. In addition, the high-iron waste acid in the primary pickling chamber can be regenerated separately, which is conducive to crystallization recovery and reduces the overall treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the appearance structure of the pickling tank of the present invention; Figure 2 Schematic diagram of the internal structure of the pickling tank of the present invention; Figure 3 This is a schematic diagram of the side structure of the lifting platform of the present invention; Figure 4 This is a schematic diagram of the combined structure of the filter rack and the lifting platform of the present invention; Figure 5 This is a partial enlarged structural diagram of part A of the present invention; Figure 6 It is a partial structural schematic diagram of the cleaning rack of the present invention; Figure 7 This is a schematic diagram of the combined structure of the storage tank and the pickling tank of the present invention; Figure 8 This is a schematic diagram of the partially enlarged structure of part B of the present invention; In the accompanying drawings, the components represented by the reference numerals are as follows: In the picture: 1. Pickling tank; 11. Primary pickling chamber; 12. Secondary pickling chamber; 13. Partition wall; 14. Fixing frame; 15. Through slot; 151. Stop platform; 2. Storage box; 3. Filter frame; 31. Boss; 32. Guide edge; 4. Lifting platform; 41. Pull rope; 42. Rotating shaft; 421. Detail shaft; 422. Tapered shaft; 5. Cleaning frame; 51. Scraper; 52. Transmission rope; 53. Guide rod; 54. Slider 1; 55. Slider 2; 56. Vibrating part. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1 - Figure 8 As shown, the present invention provides a device and method for continuous pickling of hot-dip galvanized metal parts.

[0019] like Figure 1 - Figure 2 As shown, a device and method for continuous pickling of hot-dip galvanized metal parts include a pickling tank 1; The pickling tank 1 consists of two adjacent primary pickling chambers 11 and secondary pickling chambers 12, separated by a partition wall 13. The internal mechanisms, components and structures of the primary pickling chamber 11 and the secondary pickling chamber 12 are the same; Storage boxes 2 are installed at the front and rear ends of the pickling tank 1, corresponding to the primary pickling chamber 11 and the secondary pickling chamber 12. Through grooves 15 are opened at the front and rear ends of the pickling tank 1, one side of which is connected to the pickling chamber, and the other side is connected to the primary pickling chamber 11 and the secondary pickling chamber 12. A filter rack 3 that can move up and down is installed inside the pickling chamber. It is located at the bottom during the pickling operation and is used to intercept particulate impurities and move up after pickling for easy cleaning; a lifting platform 4 is installed above the front and rear ends of the pickling tank 1, and its two ends are passed through a pull rope 41 that slides up and down. The pull rope 41 is made of twisted metal wire, and the lower end is fixedly connected to the corner position of the filter rack 3. A cleaning rack 5 is installed inside the upper end of the pickling chamber for moving back and forth to clean the filter rack 3 after it is raised.

[0020] like Figure 2 As shown, there are bosses 31 protruding upward on the left and right sides of the filter frame 3, and a guide edge 32 is provided on the side close to the filter frame 3 to block impurities moving outward. The pull rope 41 is fixedly connected to the filter frame 3 through the front and rear ends of the boss 31.

[0021] like Figure 3 As shown, a rotating shaft 42 is rotatably installed on the outer side of the lifting platform 4, which is driven to rotate by a motor at one end of the lifting platform. The rotating shaft 42 is located in the middle area of ​​the lifting platform 4, and detailed shafts 421 extend from both ends thereof. A tapered shaft 422 is fixed to the other end of the detailed shaft 421, which is rotatably connected to the plate bodies extending outward from both ends of the lifting platform 4, and one of the tapered shafts 422 is connected to the motor.

[0022] Furthermore, the upper end of the pull rope 41 is fixedly connected to one end of the detail shaft 421 adjacent to the rotating shaft 42. When the pull rope 41 is recovered, the rotation of the rotating shaft 42 will cause the pull rope 41 to first be wound around the outside of the detail rod 421, and then be wound toward one end of the tapered shaft 422 as the recovered length increases.

[0023] like Figure 4 - Figure 5 As shown, scrapers 51 extend from the front and rear sides of the cleaning frame 5, and the outer edges press down against the upper surface of the filter frame 3 to scrape off the impurities collected therein. There is a cavity below the cleaning frame 5, and a vibration part 56 is built in. The bottom is a horizontally placed cylinder, which is driven by a vibration motor built into the cleaning frame 5 to vibrate up and down.

[0024] like Figure 4 - Figure 6 As shown, a guide rod 53 is slidably connected to a slider 1 54 at one end of the cleaning rack 5, and both ends of the rod body are fixedly connected to the front and rear inner walls of the upper end of the pickling tank 1. A slider 2 55 at the other end of the cleaning rack 5 is fixedly connected to a transmission rope 52. The rope body is made of twisted iron wire, and the front and rear ends pass through the upper ends of the front and rear walls of the pickling tank 1.

[0025] Furthermore, the transmission rope 52 forms a rotating structure around one side wall of the pickling tank 1. A fixing frame 14 is fixed to the outside of the side wall of the pickling tank 1. The cylindrical body at one end is used to pass the transmission rope 52 to fix its movement path. Two upper and lower arc-shaped extrusion rollers are installed outside the side wall of the pickling tank 1, which are driven to rotate by a motor. During rotation, the friction force generated by the compression of the transmission rope 52 is used to drive its rotation.

[0026] like Figure 5 As shown, a stop 151 extends from the upper end of the through groove 15 into the pickling tank 1 to support the boss 31 to limit the rising height and position the filter frame 3 for upward movement. The boss 31 can also be used as a counterweight to drive the filter frame 3 to automatically slide down.

[0027] Furthermore, when the filter holder 3 rises to the highest point, the scraper 51 is in contact with the upper surface of the filter holder 3 . At this time, the upper surface of the filter holder 3 is slightly higher than the bottom surface of the through groove 15 , and the pushed impurities are collected inside the storage box 2 through the through groove 15 .

[0028] like Figure 1 - Figure 8As shown, a pickling method has two steps: initial pickling and fine pickling. First, the metal parts are placed in a first-level pickling chamber 11 with a high acid concentration by the crane and the hoist of the production line for the first pickling. During the pickling process, the impurities that fall off are intercepted by the filter rack 3 located at the bottom of the first-level pickling chamber 11 to prevent the impurities from directly depositing on the bottom. After pickling, as the metal parts are lifted, the rotating shaft 42 rotates to reel in the pull rope 41, thereby pulling up the filter rack 3 and making it rise. The stopper 151 presses against the boss 31 to form a position. At this time, the filter rack 3 The rack 3 moves up to be aligned with the through groove 15, and then the transmission rope 52 is driven by the motor outside the pickling tank 1 to move in a circular motion, driving the cleaning rack 5 to slide in the front-back direction, so that the scraper 51 is used to scrape off the impurities on the surface of the filter rack 3, and push the impurities to the through groove 15 so that they are stored in the storage box 2. Repeated sliding can achieve a full cleaning effect. After cleaning, the static leachate of the metal parts is also terminated, and then the metal parts are placed in the secondary pickling chamber 12 with low acid concentration for secondary pickling, and then S2 is repeated until the metal parts are removed.

[0029] In addition, during the sliding of the cleaning frame 5, the built-in vibration motor drives the vibration part 56 to hammer the filter frame 3 to shake out the impurities in the mesh, thereby facilitating the cleaning of the impurities.

[0030] It can be understood that the present invention achieves the effects of removing thick rust and fine washing to check for leaks and fill gaps through continuous pickling, and during this period, the impurities that fall off are intercepted, removed and collected, maintaining the cleanliness of the pickling liquid to be suitable for use in multiple batches of pickling operations, while also reducing the frequency of liquid changes and silt removal, saving a lot of production costs.

[0031] Throughout this specification, references to terms such as "one embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous pickling device and method for hot-dip galvanizing of metal parts, characterized by: including a pickling tank (1); The pickling chamber of the pickling tank (1) comprises a primary pickling chamber (11) and a secondary pickling chamber (12) adjacent to each other, which are separated by a partition wall (13) in the middle, and the internal components of the primary pickling chamber (11) and the secondary pickling chamber (12) are the same; Storage boxes (2) are installed at the front and rear ends of the pickling tank (1). Through slots (15) are opened at the front and rear ends of the pickling tank (1) to connect the primary pickling chamber (11) and the secondary pickling chamber (12). A filter frame (3) is installed in the interior of the primary pickling chamber (11) so as to be movable up and down. A lifting platform (4) is installed above the front and rear ends of the pickling tank (1). Draw ropes (41) are slidably installed at both ends of the lifting platform (4), and the movable ends of the ropes are connected to the filter frame (3). A cleaning frame (5) is installed in the interior of the upper end of the primary pickling chamber (11) so as to be movable up and down.

2. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 1, characterized in that: Bosses (31) protrude upwards on the left and right sides of the filter frame (3), and guide edges (32) are provided on opposite sides of adjacent bosses (31). The bosses (31) are fixedly connected to the pull rope (41).

3. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 2, characterized in that: A rotating shaft (42) is rotatably mounted on the outer side of the lifting platform (4), and detail shafts (421) extend from both ends of the rotating shaft (42), and a tapered shaft (422) is fixed to one end of the detail shaft (421).

4. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 3, characterized in that: One end of the pull rope (41) is connected to one end of the detail shaft (421) adjacent to the rotating shaft (42).

5. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 4, characterized in that: Scrapers (51) extend from the front and rear sides of the cleaning frame (5) for scraping impurities off the surface of the filter frame (3). A cavity is provided below the cleaning frame (5) and a vibration part (56) is built in.

6. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 5, characterized in that: The cleaning frame (5) is slidably connected to a guide rod (53) via a slider 1 (54) at one end, and the cleaning frame (5) is fixedly connected to a transmission rope (52) via a slider 2 (55) at the other end.

7. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 6, characterized in that: The transmission rope (52) surrounds a side wall of the pickling tank (1) to form a rotary structure, and a fixing frame (14) is fixed on the outside of the side wall of the pickling tank (1) for passing the transmission rope (52).

8. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 7, characterized in that: A stopper (151) extends from the upper end of the through groove (15) toward the interior of the pickling tank (1) and is used to abut against the boss (31) to limit the rising height.

9. The continuous pickling device for hot-dip galvanizing of metal parts according to claim 8, characterized in that: When the filter frame (3) rises to the highest point, the scraper (51) fits against the upper surface of the filter frame (3), and the guide edge (32) is used to prevent impurities from moving to the sides to avoid the scraper (51).

10. A pickling method, applied to the hot-dip galvanizing continuous pickling device for metal parts according to claim 9, characterized in that: The specific steps are as follows: S1, the initial pickling stage, the metal parts are placed in the first pickling chamber (11) with high acid concentration by the crane and the crane of the production line for the first pickling, and after pickling, the metal parts are lifted and left to leach; S2, cleaning stage, as the metal part is lifted, the rotating shaft (42) rotates to reel in the pull rope (41), thereby pulling up the filter frame (3) to make it rise, and the stopper (151) presses against the boss (31) to form a positioning; S21, driving the transmission rope (52) to move in a circular motion, driving the cleaning frame (5) to slide in the front-back direction, thereby using the scraper (51) to scrape off impurities on the surface of the filter frame (3), and pushing the impurities into the through groove (15) to be stored in the storage box (2); S22, during the sliding of the cleaning frame (5), the built-in vibration unit drives the vibration part (56) to hammer the filter frame (3) to shake out the impurities in the mesh; S3. After draining, the metal parts are placed in a secondary pickling chamber (12) with a low acid concentration for secondary pickling, and then S2 is repeated.

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