Uniform stirring device for multicomponent alloy immersion plating molten pool

Abstract

The invention relates to the technical field of high-strength cable steel wire machining equipment, and particularly discloses a multi-component alloy dip plating molten pool homogenizing stirring device which comprises a stirring mechanism, a reciprocating mechanism and a transmission mechanism used for driving the reciprocating mechanism to rotate. The stirring component is mounted in the molten pool; the reciprocating mechanism comprises a reciprocating screw rod, a guide rod and a sliding block, the reciprocating screw rod and the guide rod are arranged in the horizontal direction, the sliding block is connected with the reciprocating screw rod and the guide rod, a connecting rod is fixed to the lower end of the sliding block and slidably connected with a wedge-shaped block, a spring is arranged between the wedge-shaped block and the sliding block, and a baffle is arranged at the lower end of the wedge-shaped block; a circular ring is arranged on the stirring shaft, a wedge surface matched with the wedge block is arranged on the lower end surface of the circular ring, and the wedge block moves downwards when being in contact with the wedge surface of the circular ring. The invention aims to solve the problem that the elements of the multi-element alloy molten pool have density difference, so that the components in the molten pool are very easy to be uneven.

Description

Technical Field

[0001] This invention relates to the technical field of high-strength cable steel wire processing equipment, and in particular to a device for homogenizing and stirring a multi-alloy immersion plating bath. Background Technology

[0002] Ultra-high strength multi-alloy coated cable assemblies, as core load-bearing components of large-span bridges and other large-scale engineering projects, are the "lifeline" of these bridges. With the development of my country's economic construction, the strength requirements for steel ropes and cables used in ultra-long-span suspension bridges exceed 2100MPa, and the requirements for corrosion resistance have also increased significantly. However, the performance of the wire rods used as raw materials for ultra-high strength multi-alloy coated steel ropes and cable assemblies is approaching its limit, and the corrosion resistance of traditional galvanizing technology is insufficient to meet the requirements. Zn-6%Al-3%Mg, or ZAM alloy, is currently the zinc-based multi-alloy coating with the best known corrosion resistance. According to the results of cyclic salt spray corrosion tests, the corrosion resistance of zinc-aluminum-magnesium alloy coatings can reach 18 times that of pure zinc coatings. If this alloy can be used as the coating metal for the main cable steel wires, the overall corrosion life and corrosion safety of the bridge's main cable will be significantly improved. Therefore, zinc-aluminum-magnesium alloy coatings are the most promising choice for multi-alloy coatings.

[0003] Because the existing Zn-Al-Mg alloy coating process is applied to the galvanizing of steel plates, and galvanizing steel plates does not require the coating material to have the same high anti-coiling properties as steel wire, the performance of the existing multi-element alloy coating cannot directly meet the specific performance requirements of steel wire coating materials. To protect the high strength properties of ultra-high strength steel wire, in addition to lowering the molten pool temperature, a good fluxing process, molten pool homogenization process, molten pool stabilization process, and cooling process are needed throughout the entire process to achieve hot-dip galvanizing of ultra-high strength steel wire. On the other hand, due to the density differences among the elements in the multi-element alloy molten pool, when elements such as magnesium are added to the Zn-Al-M system, most of the Mg will float to the surface of the alloy liquid, making the surface of the alloy pot viscous, resulting in a significant difference between the coating elements and the molten pool elements. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical problem solved by this invention is to provide a homogenizing stirring device for multi-element alloy immersion pools, thereby solving the problem of uneven composition that easily occurs in the molten pool due to the density differences among the elements in the multi-element alloy molten pool.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows: a multi-element alloy immersion plating pool homogenization stirring device, comprising a stirring mechanism, a reciprocating mechanism, and a transmission mechanism for driving the reciprocating mechanism to rotate. The stirring assembly includes a stirring shaft arranged in a vertical direction and stirring blades fixed to the stirring shaft. The stirring assembly is installed in the middle of the molten pool. The reciprocating mechanism includes a reciprocating lead screw and a guide rod arranged in a horizontal direction, and a slider connected to the reciprocating lead screw and the guide rod respectively. A connecting rod is fixed to the lower end of the slider, and a wedge block is slidably connected to the connecting rod. A spring is provided between the wedge block and the slider, and a baffle is provided at the lower end of the wedge block in a vertical direction. The transmission mechanism includes a driving bevel gear arranged on the stirring shaft and a driven bevel gear arranged on the reciprocating lead screw near the stirring shaft and meshing with the driving bevel gear. A ring is provided on the stirring shaft, and a wedge surface that cooperates with the wedge block is provided on the lower end face of the ring, so that the wedge block moves downward when it contacts the wedge surface of the ring.

[0006] The technical principle and beneficial effects of this solution are as follows: the stirring assembly stirs the alloy solution, thereby promoting uniform mixing of elements within the alloy solution; secondly, the stirring shaft drives the reciprocating screw to rotate through the transmission mechanism, and the slider moves back and forth horizontally under the drive of the reciprocating screw, thereby driving the baffle to move back and forth, and thus pushing the Mg element suspended in the upper layer of the alloy solution toward the stirring center; through the cooperation of the annular wedge surface and the wedge block, the baffle automatically sinks when it moves to the stirring zone, and the magnesium-rich liquid on the surface flows downward into the range of action of the stirring blades, thereby actively incorporating the suspended layer that is difficult to reach by traditional stirring into the mixing system, ensuring the uniformity of elements in the alloy solution.

[0007] With uniform distribution of elements within the molten pool, the coating composition obtained from steel wire immersion plating is stable. This avoids a decline in corrosion resistance due to insufficient magnesium content in certain areas, and also helps maintain the coating's ductility and adhesion, meeting the requirements of ultra-high strength steel wire for anti-coiling and long-term corrosion resistance. No separate reciprocating mechanism is needed, making it energy-efficient and compatible with existing steel wire hot-dip galvanizing production lines. While achieving dynamic homogenization of the molten pool, it does not affect the rhythm and stability of continuous steel wire immersion plating. By ensuring uniform molten pool composition, the quality risks caused by coating composition fluctuations can be significantly reduced, minimizing rework or returns due to substandard corrosion resistance. Simultaneously, it improves the utilization rate of alloy raw materials, making it suitable for widespread application in the field of steel wire coatings requiring high strength and high corrosion resistance.

[0008] Furthermore, a cylindrical cam is provided on the stirring shaft, and the inner wall of the ring is slidably connected to the cylindrical cam. A limiting rod arranged vertically is slidably connected to the ring, and one end of the limiting rod is connected to a guide rod. When the wedge surface of the ring contacts the wedge block, the cylindrical cam drives the ring to move upward. When the wedge block moves to the lower end of the ring, it drives the ring to move downward. By driving the ring to move back and forth through the cam, the ring can drive the wedge block to move further downward, further pressing the suspended Mg element to the stirring center, forming a "horizontal collection - vertical pressing - stirring and mixing" cyclic operation mode, ensuring that the magnesium element continuously participates in the alloying process; and promoting uniform mixing of the alloy liquid.

[0009] Furthermore, the baffle has multiple holes, each containing a one-way valve. These valves close when the baffle moves towards the stirring shaft and open when it moves towards the molten pool wall. By using these one-way valves, the solution can pass through the open valves as the baffle moves towards the molten pool wall, pushing the suspended Mg elements towards the molten pool side. When the baffle returns to its original position, the valves close the holes, allowing the baffle to push the suspended Mg elements towards the stirring center, promoting uniform stirring.

[0010] Furthermore, the one-way valve opens diagonally downwards. As the baffle moves towards the side wall of the molten pool through the downward-opening valve, the liquid flows downwards through the valve, causing the denser Mg element to also move downwards, thereby promoting uniform mixing within the multi-element alloy liquid.

[0011] Furthermore, the reciprocating mechanism is symmetrically arranged in two sets along the stirring axis. The two sets of reciprocating mechanisms respectively push the Mg elements suspended in the molten pool on both sides of the stirring axis to the center and then press them down.

[0012] Furthermore, the stirring device also includes an auxiliary mechanism. The side wall of the molten pool is provided with a gas passage, and the bottom of the molten pool is provided with a piston chamber. A first one-way valve is provided in the gas passage to allow gas to flow from the gas passage to the piston chamber, and a second one-way valve is provided at the bottom of the molten pool to allow gas to enter the molten pool liquid from the piston chamber. The auxiliary mechanism includes a piston that reciprocates horizontally along the gas passage. The piston is hinged to a connecting rod, and the other end of the connecting rod is hinged to a rotating disk. The stirring shaft extends downward into the gas passage, and the stirring shaft drives the rotating disk to rotate via a conveyor belt.

[0013] The piston draws inert gas from the molten pool into the piston chamber through the gas passage. During the reciprocating motion of the piston, the inert gas in the piston is discharged into the molten pool through the second one-way valve, thereby creating a bubbling effect in the solution and promoting uniform mixing of the liquid. Secondly, by discharging the inert gas into the liquid, the oxygen content in the liquid is reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention.

[0015] Figure 2 This is a schematic diagram of the baffle structure.

[0016] Figure 3 This is a schematic diagram of Embodiment 2 of the present invention.

[0017] The reference numerals in the accompanying drawings include: molten pool 1, cover plate 11, air passage 12, first one-way valve 13, second one-way valve 14, piston 2, connecting rod 21, stirring shaft 3, stirring blade 31, ring 32, cylindrical cam 33, limit rod 34, reciprocating screw 4, guide rod 41, slider 42, bracket 42, connecting rod 43, wedge block 44, baffle 45, one-way valve plate 451, spring 46, driving bevel gear 5, driven bevel gear 51. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method: Example 1 is as attached. Figure 1 The diagram illustrates a homogenization and stirring device for a multi-element alloy immersion plating bath 1. The device includes a stirring mechanism, a reciprocating mechanism, and a transmission mechanism for driving the reciprocating mechanism. A cover plate 11 is provided on the bath 1. Inert gas is introduced into the bath 1 to expel air, reducing the oxygen content and preventing oxidation of the alloy liquid. The inert gas originates from nitrogen purified and recovered in a subsequent liquid nitrogen cooling process and from a pure nitrogen storage tank. The stirring device is mounted on the side wall of the bath 1 via a frame or on the cover plate 11. This embodiment uses the example of the stirring device being mounted on the cover plate 11 for illustration.

[0019] The stirring assembly includes a vertically oriented stirring shaft 3 and stirring blades 31 fixed to the stirring shaft 3. A cover plate 11 extends upward from the stirring shaft 3 and is connected to a drive motor. The stirring assembly is installed in the middle of the molten pool 1. Two sets of reciprocating mechanisms are symmetrically arranged along the stirring shaft 3. The reciprocating mechanism includes a horizontally oriented reciprocating screw 4, a guide rod 41, and sliders 42 connected to the reciprocating screw 4 and guide rod 41 respectively. One end of the reciprocating screw 4 is rotatably connected to the side wall of the molten pool 1, and the other end is rotatably connected to a bracket 42. The bracket 42 is detachably fixed to the cover plate 11 by bolts. Both ends of the guide rod 41 are detachably fixed to the side wall of the molten pool 1 and the bracket 42 by bolts. A connecting rod 4321 is fixed to the lower end of the slider 42. A wedge block 44 is slidably connected to the connecting rod 4321. A spring 46 is provided between the wedge block 44 and the slider 42. A baffle 45 is provided at the lower end of the wedge block 44 in the vertical direction. The transmission mechanism includes a driving bevel gear 5 set on the stirring shaft 3 and a driven bevel gear 51 set on the end of the reciprocating screw 4 near the stirring shaft 3 and meshing with the driving bevel gear 5. A ring 32 is provided on the stirring shaft 3. The lower end face of the ring 32 is provided with a wedge surface that cooperates with the wedge block 44, so that the wedge block 44 moves downward when it contacts the wedge surface of the ring 32.

[0020] A cylindrical cam 33 is provided on the stirring shaft 3. The inner wall of the ring 32 is slidably connected to the cylindrical cam 33. A limiting rod 34 is slidably connected to the ring 32 along the vertical direction. One end of the limiting rod 34 is connected to the guide rod. When the wedge surface of the ring 32 contacts the wedge block 44, the cylindrical cam 33 drives the ring 32 to move upward. When the wedge block 44 moves to the lower end of the ring 32, it drives the ring 32 to move downward.

[0021] The alloy solution is stirred by the stirring assembly, thereby promoting uniform mixing of elements within the alloy solution. Next, the stirring shaft 3 drives the reciprocating screw 4 to rotate via a transmission mechanism. The slider 42 moves horizontally under the drive of the reciprocating screw 4, thus causing the baffle 45 to move reciprocally. When the baffle 45 moves towards the stirring shaft 3, it pushes the Mg elements suspended in the upper layer of the alloy solution towards the stirring center. Through the cooperation of the wedge surface of the ring 32 and the wedge block 44, the baffle 45 automatically sinks when it moves to the stirring zone, guiding the magnesium-rich surface liquid downwards into the working range of the stirring blade 31. This actively incorporates the suspended layer, which is difficult to reach with traditional stirring, into the mixing system, ensuring the uniformity of elements in the alloy solution. The reciprocating screw 4 further drives the wedge block 44 to move towards the stirring shaft 3, causing the wedge block 44 to move downwards along the wedge surface to below the ring 32 and be limited by the ring 32. Through the sliding engagement between the cylindrical cam 33 and the ring 32, the ring 32 is driven to reciprocate in the vertical direction. When the wedge block 44 moves to the bottom of the ring 32, the ring 32 moves downward to actively press down the wedge block 44 and the baffle, causing the baffle 45 to sink a second time, forcefully guiding the surface magnesium-rich liquid flow into the stirring zone. After the pressing is completed, the ring 32 moves upward to reset, the baffle 45 rises once under the action of the spring 46, and the reciprocating screw 4 moves towards the side wall of the molten pool 1. When the wedge block completely leaves the ring 32, the baffle 45 rises a second time under the action of the spring 46 and resets.

[0022] like Figure 2 As shown, the baffle 45 has multiple holes, and multiple one-way valve plates 451 are installed in the holes. The one-way valve plates 451 close when the baffle 45 moves towards the stirring shaft 3, and open when the baffle 45 moves towards the wall of the molten pool 1. The one-way valve plates 451 open obliquely downwards. When the baffle 45 moves towards the side wall of the molten pool 1 through the downward-opening valve plates, the liquid flows downwards through the valve plates, causing the denser Mg element to also move downwards, thereby promoting uniform mixing inside the multi-element alloy liquid.

[0023] like Figure 3As shown, the similarities between Embodiment 2 and Embodiment 1 will not be repeated here. The difference lies in that the stirring device also includes an auxiliary mechanism. A gas passage 12 is provided on the side wall of the molten pool 1, and a piston chamber 2 is provided at the bottom of the molten pool 1. A first one-way valve 13 is provided in the gas passage 12 to allow gas to flow from the gas passage 12 to the piston chamber 2, and a second one-way valve 14 is provided at the bottom of the molten pool 1 to allow gas to enter the liquid in the molten pool 1 from the piston chamber 2. The auxiliary mechanism includes a piston 2 that reciprocates horizontally along the gas passage 12. The piston 2 is hinged to a connecting rod 4321, and a rotating disk is hinged to the other end of the connecting rod 4321. The stirring shaft 3 extends downward into the gas passage 12, and the stirring shaft 3 drives the rotating disk to rotate via a conveyor belt. The inert gas filled in the molten pool 1 is drawn into the piston chamber 2 through the gas passage 12 by the piston 2. During the reciprocating motion of the piston 2, the inert gas in the piston 2 is discharged into the molten pool 1 through the second one-way valve 14, thereby creating a bubbling effect in the solution and promoting uniform mixing of the liquid. Furthermore, by discharging the inert gas into the liquid, the oxygen content in the liquid is reduced.

[0024] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A multi-component alloy dip-pit homogenization stirring device characterized by: The utility model provides a stirring device, including stirring mechanism, reciprocating mechanism and transmission mechanism for driving reciprocating mechanism rotation, stirring assembly includes the stirring shaft along the vertical direction arrangement, and with the stirring blade fixed in stirring shaft, and stirring assembly installs in the middle part of the molten pool, reciprocating mechanism includes the reciprocating screw rod along the horizontal direction arrangement, guide rod and the sliding block connected with reciprocating screw rod, guide rod respectively, the lower end of sliding block is fixed with connecting rod, and the connecting rod is connected with the wedge block of sliding connection, and the wedge block is equipped with spring between the wedge block and sliding block, and the wedge block lower end is equipped with the baffle along the vertical direction, transmission mechanism includes the driving bevel gear arranged on the stirring shaft, and the driven bevel gear is arranged on the reciprocating screw rod close to the stirring shaft one end and is engaged with driving bevel gear, the stirring shaft is equipped with the ring, and the ring lower end surface is equipped with the wedge surface cooperation with wedge block, and makes the wedge block and the ring wedge surface contact and move downward.

2. The multi-alloy dip tank homogenization stirring apparatus of claim 1, wherein: The stirring shaft is equipped with the cylindrical cam, the ring inner wall and cylindrical cam sliding connection, and the ring sliding connection has the limiting rod along the vertical direction arrangement, and the limiting rod one end is connected with the guide rod, the cylindrical cam drives the ring to move upward when the ring wedge surface and wedge block contact, and when the wedge block moves to the ring lower end, drives the ring to move downward.

3. The multi-alloy dip tank homogenization stirring apparatus of claim 1, wherein: The baffle is opened on multiple holes, and the hole is equipped with multiple one-way valve pieces, and the one-way valve piece closes when the baffle moves to the stirring shaft, and opens when the baffle moves to the molten pool wall.

4. The multi-alloy dip tank homogenization stirring apparatus of claim 3, wherein: The one-way valve piece opens along the oblique downward.

5. The multi-alloy dip tank homogenization stirring apparatus of claim 1, wherein: The reciprocating mechanism is symmetrically equipped with two groups along the stirring shaft.

6. The multi-alloy dip tank homogenization stirring apparatus of claim 1, wherein: The stirring device further includes an auxiliary mechanism, the molten pool side wall is equipped with an air channel, and the molten pool bottom is equipped with a piston cavity; the air channel is equipped with a first one-way valve for allowing gas to flow from the air channel to the piston cavity, the molten pool bottom is equipped with a second one-way valve for allowing gas to enter the molten pool liquid from the piston cavity, the auxiliary mechanism includes a piston reciprocating horizontally along the air channel, the piston is hingedly connected with a connecting rod, the other end of the connecting rod is hingedly connected with a rotating disc, the stirring shaft extends downward into the air channel, and the stirring shaft drives the rotating disc to rotate through a conveyor belt.

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