A graphite degassing rotor that is easy to install

Abstract

This utility model belongs to the field of degassing technology in aluminum and aluminum alloy melt casting, and aims to provide an easy-to-install graphite degassing rotor, including a rotating rod and an impeller. The rotating rod is a long cylindrical structure with a through hole inside, an installation section at the top, and an external thread at the bottom. The top of the installation section has a step, and below the step is an arc-shaped groove with two symmetrical slots below the arc-shaped groove. The impeller is a circular double-layer structure with an internal thread and a flat section at the top, which connects to an inclined surface. The side of the impeller has evenly distributed hollow structures, which divide the impeller into upper and lower layers. The hollow structures are connected to a central hole, and the upper end of the hollow structures has toothed holes. This utility model has the characteristics of simple structure, convenient installation and disassembly, good connection stability, and good sealing performance, and can be widely used in the field of degassing technology in aluminum and aluminum alloy melt casting.

Description

Technical Field

[0001] This utility model relates to the field of degassing technology in aluminum and aluminum alloy melt casting, specifically, it is an easy-to-install graphite degassing rotor. Background Technology

[0002] In the aluminum molten casting process, it is necessary to degas the high-temperature aluminum liquid to ensure its purity. Graphite rotors, due to their excellent non-stick properties and machinability, are widely used in aluminum molten liquid purification. Graphite rotors typically consist of a rotor and an impeller. The rotor has internal ventilation holes through which high-purity inert gases (such as nitrogen and argon) enter the bottom of the high-temperature aluminum molten liquid. Under the high-speed rotation of the impeller, these gases disperse into tiny bubbles, which, under the pressure difference, remove hydrogen and oxide inclusions from the aluminum molten liquid, achieving the purification effect of removing hydrogen and slag.

[0003] Patent application number "201420568995.7" describes a graphite rotor for a degassing machine in an aluminum melt purification device, including a motor, rotor shaft, graphite shaft, graphite impeller, silicon carbide protective sleeve, and bracket. The motor is connected to the bracket; the rotor shaft is located inside the bracket; the rotor shaft has a vent hole inside and a silicon carbide protective sleeve on the outside. It features a simple structure, long service life, and good degassing effect. Patent application number "201020600241.7" describes a graphite rotor used in an aluminum liquid degassing machine. The surface of the graphite rotor is provided with an aluminum dihydrogen phosphate permeation layer. The service life of this aluminum dihydrogen phosphate permeated graphite rotor is four times longer than that of a graphite rotor processed from pure graphite. For example, patent application number "202421085831.9" describes a graphite degassing rotor, including a rotor and an impeller. The rotor is a long cylindrical structure with an external connecting thread at the bottom and an internal connecting thread at the top. The external connecting thread connects to the impeller, and the upper end of the internal connecting thread has a circular hole step. The rotor is covered with a protective sleeve, featuring a compact structure, good degassing effect, low production cost, and long service life. However, the rotors of the graphite rotors described in the above patents all have internal or external thread structures, and are connected to the degassing machine connectors via threads. The installation and disassembly process is relatively cumbersome and time-consuming. In addition, the threaded connectors of the degassing machine are prone to shrinkage under long-term high-temperature wear, which can easily lead to gaps after connecting with the graphite rotor, causing graphite slippage and thread wear, resulting in unnecessary production waste. Therefore, the existing graphite degassing rotor structure needs further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide an easy-to-install graphite degassing rotor, which features simple structure, convenient installation and disassembly, good connection stability and good sealing performance, and can be widely used in the field of degassing technology for aluminum and aluminum alloy melt casting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an easy-to-install graphite degassing rotor, comprising a rotating rod and an impeller, wherein the rotating rod is a long cylindrical structure with a through hole inside, an installation section at the top, and an external thread at the bottom; the installation section has a step at the top, an arc groove below the step, and two symmetrical slots below the arc groove; the impeller is a circular double-layer structure with an internal thread, a flat section at the top, and the flat section is connected to an inclined surface; the side of the impeller has a uniformly distributed hollow structure, which divides the impeller into upper and lower layers; the hollow structure is connected to a central hole, and the upper end of the hollow structure has a toothed hole.

[0006] As a further improvement of this utility model, the through hole is a circular through hole and is located at the center of the rotating rod, and the diameter of the through hole is φ8mm~φ16mm.

[0007] As a further improvement of this utility model, the diameter of the mounting section is less than or equal to the diameter of the rotating rod.

[0008] As a further improvement of this utility model, the step is a circular step with a height of 1~3mm.

[0009] As a further improvement of this utility model, a sealing gasket is placed at the step, and the thickness of the sealing gasket is 0.1~1.0mm higher than the height of the step.

[0010] As a further improvement of this utility model, the arc groove is a full-circle arc groove with a groove width of 15~35mm.

[0011] As a further improvement of this utility model, the slot is an inward arc structure with a length of 15~25mm.

[0012] As a further improvement of this utility model, the hollow structure has 3 to 6 holes, and is a fan-shaped structure.

[0013] As a further improvement of this utility model, the central hole is a truncated cone structure with a smaller upper part and a larger lower part, and the top of the hole is connected to the internal thread.

[0014] As a further improvement of this utility model, the toothed holes are provided in a total of 4 to 10, and are U-shaped.

[0015] As a further improvement of this utility model, the surfaces of the rotating rod and impeller are provided with an anti-oxidation layer.

[0016] The beneficial effects of this utility model are as follows: An easy-to-install graphite degassing rotor features simple structure, convenient installation and disassembly, good connection stability, and good sealing performance. By setting a full-circle arc-shaped groove and symmetrical slots at the top of the rotor, it is snapped together with the connecting rod at the top of the degasser, making operation simple and convenient. Simultaneously, a step is set at the top of the rotor, and a sealing gasket is used for sealing to prevent gas leakage during degassing, thus avoiding affecting the degassing effect. By setting the impeller to a double-layer structure with a circular arc profile, the stirring is more gentle, thereby increasing the rotor rotation speed to a certain extent and avoiding the generation of eddies in the high-temperature aluminum liquid. The increased rotation speed helps to disperse the gas entering the high-temperature aluminum liquid more effectively, resulting in better bubble dispersion and further improving the degassing effect. In addition, by applying an anti-oxidation layer to the surfaces of the rotor and impeller, the service life of the graphite rotor is also effectively improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the graphite degassing rotor rod of this utility model, which is easy to install;

[0018] Figure 2 This is a front view of the graphite degassing rotor rod of this utility model, which is easy to install;

[0019] Figure 3 This is a schematic diagram of the structure of the graphite degassing rotor impeller of this utility model, which is easy to install;

[0020] Figure 4 This is a cross-sectional view of the graphite degassing rotor impeller of this utility model, which is easy to install.

[0021] In the diagram: 1. Rotating rod; 2. Impeller; 3. Through hole; 4. Mounting section; 5. Step; 6. Arc groove; 7. Slot; 8. Internal thread; 9. Plane; 10. Inclined surface; 11. Hollow structure; 12. Center hole; 13. Toothed hole; 14. External thread. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Figures 1-4 As shown, this utility model discloses an easy-to-install graphite degassing rotor, comprising a rotating rod 1 and an impeller 2. The rotating rod 1 is a long cylindrical structure with a through hole 3 inside, an installation section 4 at the top, and an external thread 14 at the bottom. The installation section 4 has a step 5 at the top, an arc groove 6 below the step 5, and two symmetrical slots 7 below the arc groove 6. The impeller 2 is a circular double-layer structure with an internal thread 8 inside, a flat surface 9 at the top, and the flat surface 9 connected to an inclined surface 10. The side of the impeller 2 has evenly distributed hollow structures 11, which divide the impeller 2 into upper and lower layers. The hollow structures 11 are connected to a central hole 12, and the upper end of the hollow structures 11 has toothed holes 13.

[0023] Furthermore, the through hole 3 is a circular through hole located at the center of the rotating rod 1. The diameter of the through hole 3 is φ8mm~φ16mm, preferably φ10mm~φ12mm. Inert gases such as nitrogen or argon are introduced into the bottom of the high-temperature aluminum liquid through the through hole 3, thereby removing hydrogen and slag from the aluminum liquid.

[0024] Furthermore, the diameter of the mounting section 4 is less than or equal to the diameter of the rotating rod 1; specifically, the mounting section 4 needs to be machined, and the diameter after machining is 3 to 8 mm smaller than that of the rotating rod 1. Specifically, the diameter of the mounting section 4 is φ75 mm, the diameter of the rotating rod 1 is φ80 mm, and the length of the mounting section 4 is generally 150 to 350 mm.

[0025] Furthermore, the step 5 is a circular step with a height of 1~3mm, preferably 1.5~2mm; specifically, a sealing gasket is placed at the step 5, and the thickness of the sealing gasket is 0.1~1.0mm higher than the height of the step. When the height of the step 5 is 2mm, the thickness of the sealing gasket is 3mm, and the sealing gasket is a high-temperature resistant graphite gasket.

[0026] Furthermore, the arc groove 6 is a full-circle arc groove with a groove width of 15~35mm. Specifically, the full-circle arc groove 6, in conjunction with the buckle protruding from the connecting rod, achieves a rotational connection. Then, it is positioned and fixed by two inward arc-shaped slots 7, with a length of 15~25mm, to facilitate positioning and clamping.

[0027] Furthermore, the hollow structure 11 has 3 to 6 segments and is fan-shaped; specifically, the hollow structure 11 has 4 segments and is evenly and symmetrically distributed. Through the hollow structure 11, and in conjunction with the toothed holes 13, the introduced gas can be dispersed into tiny bubbles, resulting in better gas dispersion.

[0028] Furthermore, the central hole 12 is a truncated cone structure with a smaller upper part and a larger lower part, and the top is connected to the internal thread 8. The hollow 12 with the truncated cone structure with a smaller upper part and a larger lower part improves the smoothness of gas entering the aluminum liquid. The larger flow rate can obtain more dispersed bubbles and improve the hydrogen removal effect.

[0029] Furthermore, the toothed holes 13 are provided in a total of 4 to 10, preferably 8, and are U-shaped; specifically, the toothed holes 13 can improve the aluminum liquid rotation efficiency and quickly improve the degassing efficiency.

[0030] Furthermore, the surfaces of the rotating rod 1 and the impeller 2 are provided with an anti-oxidation layer; specifically, the anti-oxidation layer is a dense anti-oxidation layer formed by adsorbing aluminum dihydrogen phosphate onto the surface and then drying it at low temperature.

[0031] This utility model features an easy-to-install graphite degassing rotor, characterized by its simple structure, convenient installation and disassembly, good connection stability, and excellent sealing performance. The graphite rotor is used as a set, with the top of the rotor connecting to the transmission device, and the external thread 14 at the bottom of the rotor connecting to the internal thread 8 of the impeller. A full-circle arc-shaped groove 6 and symmetrical slots 7 are provided at the top mounting section 4 of the rotor 1, allowing for a snap-fit ​​connection with the connecting rod at the top of the degasser. Installation and disassembly are very convenient, avoiding the problems of threaded connections requiring rotation and the inability to install if the threads are slightly mismatched. Simultaneously, a step 5 is provided at the top of the rotor 1, and a sealing gasket is used for sealing to prevent gas leakage during degassing, thus avoiding affecting the degassing effect. By setting the impeller 2 to a double-layer structure with a circular arc profile, the stirring is gentler, thereby increasing the rotor rotation speed to a certain extent and preventing eddies from forming in the high-temperature aluminum liquid. The increased rotation speed helps to disperse the gas entering the high-temperature aluminum liquid more effectively, resulting in better bubble dispersion and further improving the degassing effect, achieving aluminum liquid purification, and meeting the physical and chemical performance requirements of aluminum castings.

[0032] This utility model can be summarized in other specific forms that do not depart from the spirit and main features of this utility model. Therefore, in any respect, the above-described embodiments of this utility model should only be considered as illustrative of this utility model and not as limiting it. Thus, any changes within the meaning and scope equivalent to the claims of this utility model should be considered as included within the scope of the claims.

Claims

1. A graphite degassing rotor easy to install, comprising a rotor shaft (1) and an impeller (2), characterized in that, The rotating rod (1) is a long cylindrical structure with a through hole (3) inside, an installation section (4) at the top, and an external thread (14) at the bottom; the installation section (4) has a step (5) at the top, an arc groove (6) below the step (5), and two symmetrical slots (7) below the arc groove (6); the impeller (2) is a circular double-layer structure with an internal thread (8) inside, a flat section (9) at the top, and the flat section is connected to an inclined surface (10); the side of the impeller (2) has a uniformly distributed hollow structure (11), which divides the impeller (2) into upper and lower layers; the hollow structure (11) is connected to the central hole (12), and the upper end of the hollow structure (11) has a toothed hole (13).

2. The easy-to-install graphite outgassing rotor of claim 1, wherein, The through hole (3) is a circular through hole and is located at the center of the rotating rod (1). The diameter of the through hole (3) is φ8mm~φ16mm.

3. The easy-to-install graphite outgassing rotor of claim 2, wherein, The diameter of the mounting section (4) is less than or equal to the diameter of the rotating rod (1).

4. The easy-to-install graphite outgassing rotor of claim 1, wherein, The step (5) is a circular step with a height of 1~3mm.

5. The easy-to-install graphite outgassing rotor of claim 4, wherein, A sealing gasket is placed at the step (5), and the thickness of the sealing gasket is 0.1~1.0mm higher than the height of the step (5).

6. The easy-to-install graphite outgassing rotor of claim 1, wherein, The circular groove (6) is a full-circle arc groove with a groove width of 15~35mm.

7. The easy-to-install graphite outgassing rotor of claim 1, wherein, The slot (7) is an inward-facing arc structure.

8. The easy-to-install graphite outgassing rotor of claim 1, wherein, The hollow structure (11) has 3 to 6 holes and is a fan-shaped structure.

9. The easy-to-install graphite outgassing rotor of claim 1, wherein, The central hole (12) is a truncated cone structure with a smaller upper part and a larger lower part, and its top is connected to the internal thread (8) in a transitional manner.

10. The easy-to-install graphite outgassing rotor of claim 1, wherein, The toothed holes (13) are provided in a total of 4 to 10, and are U-shaped.

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