Multi-layer filtering structure for alloy melt

Abstract

The utility model discloses a multilayer filtering structure for alloy melt, which comprises a container for accommodating the alloy melt, an opening at the upper end of the container and a material spraying nozzle at the lower end of the container, and further comprises a filtering structure, the filtering structure comprises a cylinder body with openings at two ends, and the cylinder body is detachably connected with the upper end of the container. A plurality of layers of filter screens made of foamed ceramic are arranged in the cylinder body and are distributed at intervals along the axial direction of the cylinder body, and the diameters of meshes of the filter screens are gradually reduced from top to bottom. According to the utility model, multi-layer filtration is adopted, so that oxides or impurities in alloy melt can be effectively filtered out, the filtering effect is better, and the material spraying nozzle is not easy to block.

Description

Technical Field

[0001] This utility model relates to the field of alloy filtration technology, specifically to a multi-layer filtration structure for alloy melts. Background Technology

[0002] For reactive metals and alloys (such as rare earth elements and zirconium), due to their extremely active chemical properties, they are readily oxidized into slag in the molten state. During rapid solidification, if oxides enter the nozzle system, they can cause instability in the injected liquid, or even blockage of the nozzles, preventing liquid flow and halting production. Since the nozzle system operates in a vacuum and high-temperature environment, mechanically clearing the nozzles is impractical. Therefore, it is essential to minimize the entry of oxides or impurities into the nozzles.

[0003] Currently, foam ceramic filter technology is used in magnesium alloys, aluminum-silicon alloys, gold alloys, and aluminum castings. Although it has a certain filtering effect, it is basically a single-layer filter with poor filtering effect. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer filtration structure for alloy melts. By using multi-layer filtration, oxides or impurities in the alloy melt can be effectively filtered out, resulting in better filtration and less clogging of the nozzle.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A multi-layer filtration structure for alloy melt includes a container for containing the alloy melt, the container being open at the top and having a nozzle at the bottom. The filtration structure includes a cylindrical body with openings at both ends, the cylindrical body being detachably connected to the top of the container. The cylindrical body contains multiple layers of foam ceramic filter screens, the multiple layers of filter screens being spaced apart along the axial direction of the cylindrical body, with the mesh diameter of the filter screens decreasing progressively from top to bottom.

[0007] In this design, the cylinder and the upper part of the container are detachably connected, which facilitates the installation, disassembly, and cleaning of the filter structure, reduces maintenance difficulty, and improves the efficiency of the equipment. The cylinder is equipped with multiple layers of foam ceramic filter screens, with the mesh diameter decreasing from top to bottom. The foam ceramic filter screen has a three-dimensional mesh structure, high porosity, and large specific surface area, which can efficiently adsorb and intercept non-metallic inclusions, oxide slag, and other impurities in the alloy melt, significantly improving the purity of the alloy melt. When the alloy melt flows through the filter structure, it first passes through a large-pore filter screen to remove larger impurities or oxides, then passes through a small-pore filter screen to further intercept tiny impurities, and finally is output through the nozzle, achieving graded filtration, effectively improving the filtration effect, and ensuring that the nozzle is not easily clogged.

[0008] Optionally, the size of the filter screen is adapted to the inner diameter of the cylinder. The filter screen has two layers. The upper filter screen has an upward convex spherical structure in the middle, and the lower filter screen has a downward concave spherical structure in the middle.

[0009] Optionally, the inner diameter of the cylinder is adapted to the inner diameter of the container. An upper connecting seat is provided circumferentially on the lower side wall of the cylinder, and a lower connecting seat is provided circumferentially on the upper side wall of the container. A vertical positioning rod is provided on the top surface of the lower connecting seat, and a positioning hole adapted to the positioning rod is provided on the bottom surface of the upper connecting seat. A threaded section is provided on the upper surface of the positioning rod, and a locking nut located above the upper connecting seat is provided on the threaded section.

[0010] Optionally, the positioning rods are arranged in a cross shape around the container.

[0011] Optionally, the bottom surface of the upper connecting seat and the top surface of the lower connecting seat are both parallel inclined surfaces, with the inclined surface of the lower connecting seat tilted towards the container side.

[0012] Optionally, the top of the container is provided with a retaining ring located inside the lower connecting seat, and the bottom of the cylinder is provided with a groove that allows the retaining ring to be inserted, the groove being located inside the upper connecting seat.

[0013] Optionally, both the upper connecting seat and the lower connecting seat are annular structures.

[0014] Optionally, the upper connecting seat is integrally formed with the cylinder body, and the lower connecting seat is integrally formed with the container.

[0015] Optionally, the top of the cylinder is provided with a funnel-shaped feed inlet.

[0016] Optionally, the bottom of the container is V-shaped, and the nozzle is located at the center of the bottom of the container.

[0017] The beneficial effects of this utility model are:

[0018] In this invention, the upper part of the cylinder and the container are detachably connected, which facilitates the installation, disassembly and cleaning of the filter structure, reduces the maintenance difficulty and improves the efficiency of the equipment. The cylinder is equipped with multiple layers of foam ceramic filter screens, with the mesh diameter decreasing from top to bottom. When the alloy melt flows through the filter structure, it first passes through the large-diameter filter screen to remove larger impurities, then passes through the small-diameter filter screen to further intercept tiny impurities, and finally is output through the nozzle, realizing graded filtration, effectively improving the filtration effect and ensuring that the nozzle is not easily clogged. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a structural diagram showing the assembly of the cylinder and container.

[0021] Figure 3 This is a schematic diagram of the distribution structure of the retaining rings at the top of the container.

[0022] Reference numerals: 1-Container, 2-Cylinder, 3-Upper connecting seat, 4-Lower connecting seat, 5-Positioning rod, 6-Locking nut, 7-Feed inlet, 8-Filter screen, 9-Steel retainer ring, 10-Spray nozzle, 11-Positioning hole, 12-Threaded section, 13-Inclined surface, 14-Groove. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] A multi-layer filtration structure for alloy melt includes a container 1 for containing the alloy melt, the upper end of the container 1 is open, and the lower end of the container 1 is provided with a nozzle 10. It also includes a filtration structure, which includes a cylinder 2 with openings at both ends. The cylinder 2 is detachably connected to the upper end of the container 1. The cylinder 2 is provided with multiple layers of foam ceramic filter screens 8. The multiple layers of filter screens 8 are distributed at intervals along the axial direction of the cylinder 2, and the mesh diameter of the filter screens 8 decreases step by step from top to bottom.

[0027] In this embodiment, as Figure 1 and Figure 2As shown, the upper end of the cylinder 2 and the container 1 are detachably connected, which facilitates the installation, disassembly and cleaning of the filter structure, reduces the difficulty of maintenance and improves the efficiency of the equipment. During rapid solidification, the molten ingot melts in the melting crucible, and its oxides float on the surface of the molten metal. If the molten metal is directly poured into container 1, the oxides or impurities will clog the nozzle 10. In this embodiment, a multi-layer foam ceramic filter screen 8 is set inside the cylinder 2, with the mesh diameter decreasing from top to bottom. The foam ceramic filter screen 8 has a three-dimensional mesh structure, high porosity, and large specific surface area, which can efficiently adsorb and intercept non-metallic inclusions, oxide slag, and other impurities in the alloy melt, significantly improving the purity of the alloy melt. Thus, each time the alloy melt is poured, when it flows through the filter structure, it first passes through the large-pore filter screen 8 to remove larger impurities or oxides, and then passes through the small-pore filter screen 8 to further intercept tiny impurities. Finally, it is output through the nozzle 10, realizing graded filtration, effectively improving the filtration effect, ensuring that the nozzle 10 is not easily clogged, and that oxides or impurities remain in the filter structure, ensuring the cleanliness of the alloy melt in container 1.

[0028] Furthermore, the size of the filter screen 8 is adapted to the inner diameter of the cylinder 2. The filter screen 8 has two layers. The upper filter screen 8 has an upward convex spherical structure in the middle, and the lower filter screen 8 has a downward concave spherical structure in the middle.

[0029] Specifically, the convex spherical design of the upper filter screen 8 allows the molten alloy to diffuse from the center of the cylinder 2 outwards, forming a radially uniform liquid flow. The concave spherical design of the lower filter screen 8 guides the dispersed liquid flow back to the central area, forming an axially concentrated flow, thus improving filtration efficiency. The curved structure ensures that the liquid pressure is evenly distributed on the surface of the filter screen 8, preventing deformation or breakage of the filter screen 8 due to pressure concentration. The curved design of the upper and lower filter screens 8 forms a dynamic balance, with the upper layer dispersing the liquid flow and the lower layer converging the liquid flow, reducing the direct impact of the liquid flow on the filter screen 8.

[0030] Furthermore, the inner diameter of the cylinder 2 is adapted to the inner diameter of the container 1. The lower end side wall of the cylinder 2 is provided with an upper connecting seat 3, and the upper end side wall of the container 1 is provided with a lower connecting seat 4. The top surface of the lower connecting seat 4 is provided with a vertical positioning rod 5, and the bottom surface of the upper connecting seat 3 is provided with a positioning hole 11 adapted to the positioning rod 5. The upper surface of the positioning rod 5 is provided with a threaded section 12, and a locking nut 6 located above the upper connecting seat 3 is provided on the threaded section 12.

[0031] Specifically, after prolonged use, the filter structure requires regular cleaning of the filter screen 8. To ensure production efficiency, the filter structure adopts a modular design. When cleaning the filter screen 8 is needed, simply disassemble the cylinder 2 and replace it with a new cylinder 2 containing the filter screen 8, which can then be installed onto the container 1. Figure 2As shown, during assembly, align the upper connecting seat 3 at the lower end of the cylinder 2 with the lower connecting seat 4 at the upper end of the container 1, insert the positioning rod 5 into the positioning hole 11, and then tighten the locking nut 6 on the threaded section 12 of the positioning rod 5, causing it to descend along the threaded section 12 and press against the upper connecting seat 3, thus completing the fixation. During disassembly, rotate the locking nut 6 in the opposite direction to release the pressure on the upper connecting seat 3, lift the cylinder 2, and disengage the positioning rod 5 from the positioning hole 11, completing the disassembly. The entire disassembly and assembly process is simple and quick, requiring no complex tools, and significantly shortening equipment maintenance time. To prevent molten alloy from leaking from the connection, a high-temperature resistant sealing gasket, such as a graphite gasket, can be added to the contact surface of the two connecting seats.

[0032] Furthermore, the positioning rods 5 are arranged in a cross shape around the container 1.

[0033] Furthermore, the bottom surface of the upper connecting seat 3 and the top surface of the lower connecting seat 4 are both parallel inclined surfaces 13, with the inclined surface 13 of the lower connecting seat 4 inclined toward the container 1.

[0034] Specifically, the bottom surface of the upper connecting seat 3 and the top surface of the lower connecting seat 4 have parallel inclined surfaces 13. The inclined surface 13 on the lower connecting seat 4 is inclined towards the container 1, which means that the cross-section of the lower connecting seat 4 and the upper connecting seat 3 forms a V-shaped structure. This can prevent a small amount of molten liquid from leaking to the outside through the assembly gap. The inclined surface 13 also makes the sealing gasket fit more tightly when connected, increasing the contact area and improving the anti-seepage effect.

[0035] Furthermore, the top of the container 1 is provided with a retaining ring 9 located inside the lower connecting seat 4, and the bottom of the cylinder 2 is provided with a groove 14 that allows the retaining ring 9 to be inserted. The groove 14 is located inside the upper connecting seat 3.

[0036] Specifically, such as Figure 3 As shown, in order to further improve the anti-leakage effect, a retaining ring 9 is integrally formed at the top of the container 1, and a groove 14 is integrally formed at the bottom of the cylinder 2. When the cylinder 2 and the container 1 are assembled, the retaining ring 9 is inserted into the groove 14. In this way, the alloy molten liquid can not leak from the installation gap between the cylinder 2 and the container 1 to the outside. The two sides of the top of the retaining ring 9 can be set as bevels, which makes it easier to insert into the groove 14.

[0037] Furthermore, both the upper connecting seat 3 and the lower connecting seat 4 are annular structures.

[0038] Furthermore, the upper connecting seat 3 is integrally formed with the cylinder 2, and the lower connecting seat 4 is integrally formed with the container 1.

[0039] Furthermore, the top of the cylinder 2 is provided with a funnel-shaped feed inlet 7.

[0040] Furthermore, the bottom of the container 1 is V-shaped, and the nozzle 10 is located at the center of the bottom of the container 1. Specifically, the V-shaped bottom of the container 1 facilitates the collection of molten alloy above the nozzle 10, thereby improving the discharge efficiency.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A multi-layer filtration structure for molten alloy, comprising a container (1) for containing molten alloy, the upper end of the container (1) being open, and a nozzle (10) being provided at the lower end of the container (1), characterized in that, It also includes a filter structure, which includes a cylinder (2) with openings at both ends. The cylinder (2) is detachably connected to the upper end of the container (1). The cylinder (2) is provided with a multi-layered foam ceramic filter screen (8). The multi-layered filter screen (8) is distributed at intervals along the axial direction of the cylinder (2). The mesh diameter of the filter screen (8) decreases gradually from top to bottom. The size of the filter screen (8) is adapted to the inner diameter of the cylinder (2). The filter screen (8) has two layers. The upper filter screen (8) has a convex spherical structure with the middle part raised upward, and the lower filter screen (8) has a concave spherical structure with the middle part recessed downward. The inner diameter of the cylinder (2) is adapted to the inner diameter of the container (1). The lower end side wall of the cylinder (2) is provided with an upper connecting seat (3) and the upper end side wall of the container (1) is provided with a lower connecting seat (4). The top surface of the lower connecting seat (4) is provided with a vertical positioning rod (5). The bottom surface of the upper connecting seat (3) is provided with a positioning hole (11) adapted to the positioning rod (5). The upper surface of the positioning rod (5) is provided with a threaded section (12) and a locking nut (6) located above the upper connecting seat (3) is provided on the threaded section (12).

2. The multi-layer filtration structure for alloy melt according to claim 1, characterized in that, The positioning rods (5) are arranged in a cross shape around the container (1).

3. The multi-layer filtration structure for alloy melt according to claim 1, characterized in that, The bottom surface of the upper connecting seat (3) and the top surface of the lower connecting seat (4) are both inclined surfaces (13) that are parallel to each other, and the inclined surface (13) of the lower connecting seat (4) is inclined toward the container (1).

4. A multi-layer filtration structure for molten alloys according to claim 1, characterized in that, The container (1) has a retaining ring (9) at the top, which is located inside the lower connecting seat (4), and the cylinder (2) has a groove (14) at the bottom, which allows the retaining ring (9) to be inserted. The groove (14) is located inside the upper connecting seat (3).

5. A multi-layer filtration structure for alloy melt according to claim 1, characterized in that, Both the upper connecting seat (3) and the lower connecting seat (4) are ring structures.

6. A multi-layer filtration structure for alloy melt according to claim 1, characterized in that, The upper connecting seat (3) is integrally formed with the cylinder (2), and the lower connecting seat (4) is integrally formed with the container (1).

7. A multi-layer filtration structure for alloy melt according to claim 1, characterized in that, The top of the cylinder (2) is provided with a funnel-shaped feed inlet (7).

8. A multi-layer filtration structure for alloy melt according to claim 1, characterized in that, The container (1) has a V-shaped bottom and the nozzle (10) is located at the center of the bottom of the container (1).

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