一种用于铝合金晶粒细化的冷料定量添加装置
By combining the magnetically driven scraper assembly with the double-flip valve isolation channel, the sealing and quantitative accuracy problems of the cold material addition device are solved, realizing the continuous and uniform addition of cold material and improving the stability and reliability of the aluminum alloy smelting process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2026-01-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cold material adding devices are prone to moisture and clumping in the storage silo, leading to poor material discharge or uneven material feeding. Furthermore, they lack effective sealing, which can easily cause the cold material to oxidize and fail, as well as dust to spill out.
A non-contact magnetically driven scraping assembly and a two-stage flap valve isolation channel are used to construct a highly sealed and reliable cold material quantitative addition structure, including a storage bin, a quantitative feeding mechanism and a magnetically driven scraping assembly. The flexible scraping arm and magnetic transmission achieve shaft seal-free self-cleaning, and the double flap valve isolation channel establishes a dynamic airtight barrier.
It enables continuous, uniform, and precise addition of cold materials, preventing agglomeration and oxidation, ensuring that the furnace atmosphere does not backflow, and improving the stability and reliability of the aluminum alloy smelting process.
Smart Images
Figure CN224517404U_ABST
Abstract
Claims
1. A cold feed dosing device for aluminum alloy grain refinement, characterized by: Includes a storage silo, a quantitative feeding mechanism, a magnetic drive scraper assembly, and a double-flap valve isolation channel, wherein: The storage silo has a conical shell structure that is larger at the top and smaller at the bottom, with a smooth and continuous inner wall. The top of the storage silo is provided with a feeding port, and a metal sealing cover is provided on the feeding port through a flange structure. A ceramic fiber sealing gasket is provided between the metal sealing cover and the flange structure of the feeding port. The bottom center of the storage silo has a discharge hole. A magnetically driven scraping assembly is disposed inside the storage bin. The magnetically driven scraping assembly includes a flexible scraping arm, a rotating shaft, an inner magnetic rotor, an outer magnetic rotor, a drive motor, and a non-magnetic protective cover. The flexible scraping arm extends downward along the inner wall of the storage bin. The top end of the flexible scraping arm is connected to the rotating shaft. The upper end of the rotating shaft passes through the metal sealing cover and is fitted with the inner magnetic rotor. The inner magnetic rotor is completely enclosed within the non-magnetic protective cover, and the non-magnetic protective cover is fixedly disposed outside the metal sealing cover. An outer magnetic rotor is disposed on the outside of the non-magnetic protective cover, directly opposite the inner magnetic rotor, and the outer magnetic rotor is coaxially arranged with the inner magnetic rotor. The outer magnetic rotor is connected to the output shaft of the drive motor, and the inner magnetic rotor and the outer magnetic rotor transmit torque through magnetic coupling. The quantitative feeding mechanism is a horizontally arranged screw meter, including a housing, a single-headed screw and a variable frequency motor. One end of the housing is provided with a feed inlet and the other end is provided with a discharge outlet. The feed inlet and the discharge outlet are sealed together. The discharge outlet faces vertically downward. The single-headed screw is located inside the housing, and one end of the single-headed screw extends out of the housing and is connected to the variable frequency motor. The double flap valve isolation channel is arranged vertically, with the upper end connected to the outlet of the quantitative feeding mechanism and the lower end connected to the smelting furnace. The double flap valve isolation channel is equipped with an upper flap valve and a lower flap valve, and a transition cavity is formed between the upper flap valve and the lower flap valve.
2. A cold feed device for the dosing of a grain refiner for aluminium alloys according to claim 1, characterized in that: The flexible scraper arm is integrally molded from high-temperature resistant silicone material, and the cross-section of the flexible scraper arm is arc-shaped. The outer edge contour of the flexible scraper arm fits into the conical inner wall of the storage bin, and the end of the flexible scraper arm is close to the edge of the discharge hole but does not contact it.
3. A cold feed device for the dosing of a grain refiner for aluminium alloys according to claim 2, characterized in that: The surface of the single-headed screw is coated with a tungsten carbide wear-resistant layer, and the outer wall of the housing is provided with reinforcing ribs.
4. The cold feed quantitative adding device for aluminum alloy grain refinement according to claim 3, characterized in that: The upper flap valve includes an upper valve plate, an upper rotating shaft, and an upper drive cylinder. The upper valve plate is a circular metal plate with a graphite sealing ring embedded in its edge. The upper rotating shaft passes through the side wall of the double flap valve isolation channel and is supported by a bearing. The upper rotating shaft coincides with any diameter of the upper valve plate. The piston rod of the upper drive cylinder is hinged to the outer side of the upper valve plate, pushing the upper valve plate to rotate around the upper rotating shaft.
5. A cold feed device for the dosing of a grain refiner for aluminium alloys according to claim 4, characterized in that: The lower flap valve includes a lower valve plate, a lower rotating shaft, and a lower drive cylinder. The lower valve plate is also a circular metal plate, and a graphite sealing ring is embedded in the edge of the lower valve plate. The lower rotating shaft passes through the side wall of the isolation channel of the double flap valve and is supported by a bearing. The lower rotating shaft coincides with any diameter of the lower valve plate. The piston rod of the lower drive cylinder is hinged to the outer side of the lower valve plate, pushing the upper valve plate to rotate around the upper rotating shaft. Furthermore, the upper drive cylinder and the lower drive cylinder are interlocked by a pneumatic logic circuit.
6. The cold material quantitative addition device for refining aluminum alloy grains according to claim 5, characterized in that: The drive motor is a stepper motor, which is fixed to the top support of the storage silo.
7. A cold feed device for the dosing of a grain refiner for aluminium alloys according to claim 6, characterized in that: The cold material metering device is supported by a rigid frame.
8. A cold feed device for the dosing of a grain refiner for aluminium alloys according to claim 7, characterized in that: The outer wall of the storage silo is provided with an insulation layer, which is composed of aluminum silicate fiber felt and is fixed with a stainless steel sheet.