Crucible bottom plug for suspension smelting

Abstract

The utility model relates to a crucible bottom plug for suspension smelting, which comprises a crucible bottom plug body, the upper part of the crucible bottom plug body is provided with a plurality of split petal body structures, and a water inlet loop and a water return loop which are communicated with each other are respectively arranged in each petal body structure; a water return port and a water inlet are further formed in the lower portion of the crucible bottom plug body, the water inlet is connected with a water inlet loop of each petal body structure, and the water return port is connected with a water return loop of each petal body structure. The bottom plug has the advantages that an innovative split type structure is adopted, the main water inlet and the main water return opening are formed in the bottom of the bottom plug, it is guaranteed that cooling water can efficiently enter and flow out, the independent water inlet pipeline and the independent water return pipeline are arranged in each split type structure, the water flow area and the consistency of the thickness of the water cooling wall are increased, and the water cooling effect is improved. And it is ensured that cooling water uniformly flows through all the parts in the using process, the cooling effect and cooling uniformity of the contact position of the top of the crucible bottom plug and molten metal are improved, and then the service life of the crucible bottom plug is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vacuum suspension smelting, especially to a crucible bottom plug for suspension smelting. BACKGROUND

[0002] At present, the structure of the crucible bottom plug generally adopts a split design, which means that each component of the crucible bottom plug is manufactured independently. After the manufacture of each subcomponent is completed, they are connected into a complete bottom plug through welding technology. However, this manufacturing method puts strict requirements on the welding technology. If the welding quality is not high, it may cause unstable connection between components, thereby causing component separation or tiny cracks at the connection, which may cause water leakage after the bottom plug is watered, or in the case of micro leakage, it may make the vacuum degree of the equipment unable to meet the requirements of the smelting process.

[0003] In addition, as a key component in suspension smelting, the existing preparation process of the water-cooled copper crucible bottom plug is complex, and the cooling water path in the crucible bottom plug is not reasonably designed. The existing cooling method of the crucible bottom plug is usually to cool the entire bottom plug, but this method is not ideal for the cooling effect of the bottom of the crucible, and the cooling effect is unevenly distributed. This uneven cooling effect greatly shortens the service life of the crucible bottom plug and increases the operating cost of the crucible bottom plug in an invisible way. Moreover, the preparation process of the existing crucible bottom plug is complex. Therefore, it is urgent to explore a new design scheme of the crucible bottom plug to improve the performance and reliability of the crucible bottom plug while reducing its manufacturing and maintenance cost. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a crucible bottom plug for suspension smelting to solve at least one of the technical problems mentioned in the background.

[0005] The technical solution for solving the above technical problem is as follows: a crucible bottom plug for suspension smelting, comprising: a crucible bottom plug body, the upper part of the crucible bottom plug body is a plurality of petal structure of split type, a water inlet circuit and a water return circuit are respectively arranged in each petal structure;

[0006] A water return port and a water inlet port are further arranged below the crucible bottom plug body, the water inlet port is connected to the water inlet circuit of each petal structure, and the water return port is connected to the water return circuit of each petal structure.

[0007] The utility model discloses beneficial effect is: adopt the innovative split -type structure, and revolutionary improvement is brought to crucible bottom plug, and this design is ingeniously set up total water inlet and total backwater mouth at the bottom of bottom plug, and the cooling water can be efficiently entered and flowed out, and the independent water inlet and backwater pipeline are ingeniously arranged in the inside of every split -type structure, and this unique internal pipeline layout ensures that the cooling water can evenly flow through every part in the use process of crucible bottom plug, improves the cooling effect of the top of crucible bottom plug and metal liquid contact, and through the waterway structure design of the inside of crucible bottom plug, the water flow area and the wall thickness consistency of water cooling wall are increased, and the water flow and the cooling uniformity of the top of crucible plug and metal liquid contact are improved.

[0008] On the basis of the above technical scheme, the utility model still can make following improvement.

[0009] Further, the upper part of the crucible bottom plug body is evenly divided into a plurality of petal structures in the circumferential direction.

[0010] The beneficial effect of the above further scheme is: the split -type structure and the independent and connected water inlet and backwater circuit arranged in each split -type interior make the cooling effect better and more uniform, ensuring the stability and durability of the crucible bottom plug in the high-temperature smelting process.

[0011] Further, the upper part of the crucible bottom plug body is evenly divided into 4-16 petal structures in the circumferential direction.

[0012] The beneficial effect of the above further scheme is: meet the production needs, seamless connection between each petal structure, avoid various defects that may occur in the traditional welding process, ensure the sealing performance of the bottom plug, eliminate the risk of micro leakage, provide reliable guarantee for the smelting process, meet the requirements of smelting process.

[0013] Further, the water inlet circuit and the backwater circuit are arranged in each petal structure, the water inlet circuit and the backwater circuit are parallel to each other and arranged in the vertical direction, and the backwater circuit is arranged on the outer side of the water inlet circuit.

[0014] The beneficial effect of the above further scheme is: by setting up independent water inlet circuit and backwater circuit to undertake water inlet and backwater function respectively, the path is clear, and the cooling water can evenly flow through every part to realize the effect of overall cooling, improve the cooling efficiency, and the evenly arranged petal structure makes the heat dissipation more uniform.

[0015] Further, each of the petal body structures is provided with independent water inlet circuits and water return circuits, which are parallel to each other and arranged in the vertical direction, and the water inlet circuits are arranged outside the water return circuits.

[0016] The above further scheme has the beneficial effect of providing a position that is various and flexible.

[0017] Further, the water inlet circuits and the water return circuits are connected above.

[0018] The above further scheme has the beneficial effect of forming a closed circulation system inside each petal body structure through the upper connecting pipeline, realizing internal circulation cooling, and the head of the crucible plug is attached to the bottom of the water-cooled crucible, which is arranged close to the water-cooled crucible through the upper connecting pipeline, and is more conducive to heat exchange, thereby improving the cooling efficiency.

[0019] Further, the water inlet and the water return are arranged on the same side below the crucible plug body.

[0020] The above further scheme has the beneficial effect of ensuring that the cooling water can efficiently enter and flow out by arranging the total water inlet and the total water return below the crucible plug body.

[0021] Further, the crucible plug body below the petal body structure is further provided with a water inlet pipe connecting the water inlet and the water inlet circuit, and a water return pipe connecting the water return and the water return circuit.

[0022] The above further scheme has the beneficial effect of carefully constructing the hollow water inlet and outlet channels inside the crucible plug, which not only optimizes the flow path of the cooling water, but also improves the heat exchange efficiency.

[0023] Further, the water return pipe is arranged outside the water inlet pipe.

[0024] Or, the water inlet pipe is arranged outside the water return pipe.

[0025] The above further scheme has the beneficial effect of optimizing the layout of the water inlet and outlet channels inside the crucible plug, which is conducive to improving the cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a front view of an embodiment of the utility model;

[0027] Figure 2 It is a side view of an embodiment of the utility model;

[0028] Figure 3An embodiment of the utility model for a top view;

[0029] Figure 4 An embodiment of the utility model for a partial sectional view;

[0030] Figure 5 An embodiment of the utility model for a sectional view;

[0031] Figure 6 An embodiment of the utility model for a sectional view of the petal structure.

[0032] In the drawings, the components represented by each reference numeral are listed as follows:

[0033] 1, the crucible bottom plug body, 2, petal structure, 3, water inlet circuit, 4, water return circuit, 5, water inlet, 6, water return, 7, communication pipeline, 8, water inlet pipe, 9, water return pipe. Specific implementation

[0034] The principles and characteristics of the utility model are described below in conjunction with the drawings, and the examples are only used to explain the utility model and not to limit the scope of the utility model.

[0035] As Figures 1-3 The utility model provides a crucible bottom plug for suspension smelting, include: crucible bottom plug body 1, the upper of crucible bottom plug body 1 is the multiple petal structure 2 of split petal, and is provided with the water inlet circuit 3 and water return circuit 4 of communication in each petal structure 2 respectively, namely in each petal structure 2 is independently provided with a cooling water circuit respectively.In the lower of crucible bottom plug body 1 still be provided with water return 6 and water inlet 5, water inlet 5 connects the water inlet circuit 3 of each petal structure 2, water return 6 connects the water return circuit 4 of each petal structure 2.Cooling water is dispersed and circulated to the water inlet circuit 3 of each petal structure 2 through water inlet 5, cooling water flows through water inlet circuit 3 and water return circuit 4 in turn, and flows out through water return 6, so that a closed circulation system is formed inside the crucible bottom plug, realizing internal circulation cooling, not only simplifying the layout of external pipeline, but also reducing heat loss, ensuring the stability and durability of the crucible bottom plug in the high-temperature smelting process.

[0036] In the embodiment, the crucible bottom plug, the water inlet pipe 8 and the water return pipe 9 are all made of copper material, and the crucible bottom plug is integrally formed by a 3D printing method, and the specific steps are as follows:

[0037] S1: put the copper powder into the powder cylinder of the 3D printer.

[0038] S2: use drawing software to design the crucible bottom plug drawing and perform slicing processing.

[0039] S3: During printing, the mold moves down layer by layer, and the powder tank moves up layer by layer. The copper powder is scraped into the mold and melted by laser.

[0040] S4: After printing, the mold is raised to the set position, and the remaining powder is recovered. The printed part is post-processed, including but not limited to surface treatment and heat treatment.

[0041] In this step, the copper powder particle size is 15-53 μm, the purity should not be lower than 99.95%, and the powder morphology is spherical. The drawing software includes but is not limited to CAD, Solidworks, etc.; the post-processing method includes but is not limited to wire cutting, machining, etc.

[0042] By adopting advanced 3D printing technology, the integrated forming process of the crucible bottom plug is realized, which is carried out in a strictly controlled vacuum environment, ensuring the seamless connection between the various parts of the bottom plug, thereby avoiding various defects that may occur in the traditional welding process. This process not only simplifies the preparation process of the bottom plug, but also ensures the excellent sealing performance of the bottom plug, eliminating the risk of micro-leakage and providing reliable protection for the smelting process.

[0043] In this embodiment, an innovative split structure is adopted, which brings revolutionary improvements to the crucible bottom plug. This design cleverly sets a total water inlet 5 and a total water return outlet 6 at the bottom of the bottom plug, ensuring that the cooling water can efficiently enter and flow out. By cleverly arranging independent water inlet and return pipelines inside each split structure, this unique internal pipeline layout ensures that cooling water can uniformly flow through each part during the use of the crucible bottom plug, improving the cooling effect at the top of the crucible bottom plug where it contacts the metal liquid. Through the internal waterway structure design of the crucible bottom plug, the water flow area and the consistency of the wall thickness of the water cooling wall are increased, improving the water flow and the cooling uniformity of the contact between the top of the crucible plug and the metal liquid. At the same time, the service life of the crucible plug is extended, and the cooling effect and cooling uniformity are improved, reducing the reaction erosion of the metal liquid to the crucible plug and prolonging the service life.

[0044] In some feasible embodiments, the upper part of the crucible bottom plug body 1 is uniformly divided into multiple petal structures 2 circumferentially, wherein a section of the upper part of the crucible bottom plug body 1 is split, and a section is not split. During operation, the head of the bottom plug is attached to the bottom of the water-cooled crucible. The split structure and the independently arranged and connected water inlet and return circuits 3 and 4 inside each split part make the cooling effect better and more uniform, ensuring the stability and durability of the crucible bottom plug during high-temperature smelting.

[0045] In this embodiment, the upper part of the crucible bottom plug body 1 can be uniformly divided into 4-16 petal structures 2 circumferentially. In the preferred scheme of this embodiment, as shown in Figure 3 、 Figure 6As shown, the upper part of the crucible bottom plug body 1 is evenly divided into ten petal structures 2 in the circumferential direction, meeting the production needs. It is conceivable that, as an alternative, the number of petal structures 2 can be reasonably set according to production needs. Moreover, in this embodiment, the crucible bottom plug is integrally formed by 3D printing technology, realizing the integrated forming process of the crucible bottom plug and ensuring the seamless connection between the petal structures 2, thereby avoiding various defects that may occur in the traditional welding process, ensuring the sealing performance of the plug, eliminating the risk of micro-leakage, providing reliable protection for the smelting process, and meeting the requirements of the smelting process.

[0046] As shown in the cross-sectional view, Figure 5 In the preferred scheme, each petal structure 2 is provided with an independent water inlet circuit 3 and a water return circuit 4. The water inlet circuit 3 and the water return circuit 4 are vertically arranged along the height direction of the petal structure 2, and the water inlet circuit 3 and the water return circuit 4 are arranged in parallel with each other, wherein the water return circuit 4 is arranged outside the water inlet circuit 3. As shown in the cross-sectional view, Figure 6 The cross section of the water inlet circuit 3 is an area enclosed by two straight sides parallel to the two side edges of the petal structure 2 and a circular arc, and the cross section of the water return circuit 4 is an area enclosed by two straight sides parallel to the two side edges of the petal structure 2 and two circular arcs with different radii. By arranging independent water inlet circuit 3 and water return circuit 4 to undertake water inlet and water return functions respectively, the path is clear, ensuring that the cooling water can uniformly flow through each part to achieve the effect of overall cooling, improve the cooling efficiency, and the uniform arrangement of the petal structure 2 makes the heat dissipation more uniform.

[0047] It is conceivable that, as an alternative, the water inlet circuit 3 can be arranged outside the water return circuit 4, i.e. the positions of the water inlet circuit 3 and the water return circuit 4 are exchanged, and the corresponding positions of the pipeline connecting the water return port 6 and the water return circuit 4 and the pipeline connecting the water inlet port 5 and the water inlet circuit 3 are exchanged, and the setting positions are diverse and flexible.

[0048] In this embodiment, the water inlet circuit 3 and the water return circuit 4 are connected at the top, and the pipeline connecting the water inlet circuit 3 and the water return circuit 4 is defined as the connecting pipeline 7, and the water inlet circuit 3, the water return circuit 4 and the connecting pipeline 7 are arranged inside the petal structure 2. The upper connecting pipeline 7 forms a closed circulation system inside each petal structure 2, realizes internal circulation cooling, and the head of the crucible bottom plug is attached to the bottom of the water-cooled crucible. Through the upper connecting pipeline 7, it is closer to the water-cooled crucible, which is more conducive to heat exchange, thereby improving the cooling efficiency.

[0049] As shown in the cross-sectional view, Figure 1 , Figure 5As shown, in this embodiment, the water inlet 5 and the water return port 6 are disposed on the same side below the crucible bottom plug body 1 for ease of installation. The diameter of the bottom of the crucible bottom plug body 1 is smaller than the diameter of the top of the crucible bottom plug body 1. It is conceivable that, as an alternative, the water inlet 5 and the water return port 6 can be disposed on different sides of the crucible bottom plug body 1, respectively. Providing the main water inlet 5 and the main water return port 6 below the crucible bottom plug body 1 ensures efficient inflow and outflow of cooling water.

[0050] like Figures 4-5 As shown, in a preferred embodiment, a water inlet pipe 8 and a water return pipe 9 are further provided in the crucible bottom plug body 1 below the petal structure 2. The water inlet pipe 8 connects the water inlet 5 and the water inlet circuit 3, and the water return pipe 9 connects the water return port 6 and the water return circuit 4. By carefully constructing hollow water inlet and outlet channels inside the crucible bottom plug, these channels not only optimize the flow path of the cooling water, but also improve the heat exchange efficiency. In this embodiment, the return water circuit 4 is arranged on the outside of the water inlet circuit 3, and correspondingly, the water inlet 5 is arranged at the bottom of the crucible bottom plug body 1, and the return water port 6 is arranged on the side wall near the bottom of the crucible bottom plug body 1, and the water inlet 5 and the return water port 6 are opened in the same direction, so the water inlet pipe 8 located below the crucible bottom plug body 1 is located on the central axis below the crucible bottom plug body 1, and the return water pipe 9 surrounds the water inlet pipe 8 and is arranged on the outside of the water inlet pipe 8, and the top of the water inlet pipe 8 and the return water pipe 9 extend all the way to the undivided position above the crucible bottom plug body 1, the water inlet pipe 8 is connected to the bottom of each water inlet circuit 3, and the return water pipe 9 is connected to the bottom of each return water circuit 4.

[0051] In terms of performance, the optimized crucible bottom plug has significantly increased water flow, greatly enhancing the cooling effect and uniformity of the crucible bottom plug and the crucible bottom. The petal-shaped structure ensures that every part of the crucible bottom plug receives uniform and effective cooling, improving the cooling effect at the point where the top of the crucible bottom plug contacts the molten metal. This increases the water flow area and the wall thickness consistency of the water-cooled stave, improving the water flow rate and cooling uniformity at the point where the top of the crucible plug contacts the molten metal. This ensures that the crucible bottom plug exhibits excellent resistance to ablation in the high-temperature molten pool. At the same time, it extends the service life of the crucible plug. By improving cooling effect and cooling uniformity, the reactive erosion of the molten metal on the crucible plug is reduced, thus extending its service life.

[0052] In the embodiment in which the water inlet circuit 3 is arranged outside the water return circuit 4, as an alternative, it is conceivable to adjust the positions of the water return port 6, the water inlet port 5, the water return pipe 9 and the water inlet pipe 8 correspondingly, specifically, the water return port 6 is arranged at the bottom of the crucible plug body 1, the water inlet port 5 is arranged on the side wall close to the bottom of the crucible plug body 1, wherein the water inlet port 5 and the water return port 6 can be arranged in the same direction or at a certain angle, and the water return pipe 9 is arranged on the central axis below the crucible plug body 1, and the water inlet pipe 8 is arranged outside the water return pipe 9.

[0053] In the embodiment, the water inlet pipeline and the water return pipeline in the original crucible plug are simplified, the original combination mode of the outer pipe and the inner pipe is cancelled, and the water jacket, which is the connecting piece of the total water inlet pipeline, the total water return pipeline and each sub water inlet pipeline and sub water return pipeline, is cancelled, each split part does not need to be connected with an additional metal pipeline or sealing device, and the water inlet and water return paths in the entire crucible plug do not need to rely on additional metal pipelines or sealing devices, but realize smooth conversion of water inlet and water return through a single pipeline system, simplify the preparation process, improve the water flow in the crucible plug, and improve the cooling effect and cooling uniformity of the crucible plug.

[0054] Compared with the split type preparation method in which each subcomponent is connected through welding, the 3D powder printing integrated forming process for preparing the crucible plug not only greatly reduces the number of welded parts, but also effectively reduces the risk of potential problems such as micro-leakage; in addition, due to the optimization of the internal structure of the crucible plug, the water jacket and the traditional components such as the inner and outer water pipes are cancelled, the preparation work such as drawing and mold preparation can be obviously shortened, the amount of copper powder used and the number of subcomponents required for manufacturing the crucible plug are further reduced, the problems that may be encountered in the welding process of the split type structure are avoided, thereby avoiding damage to the crucible plug caused by welding, shortening the production cycle and reducing the labor cost and manufacturing cost.

[0055] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A crucible bottom plug for use in suspension smelting, characterized in that The utility model relates to a bottom plug for a crucible, comprising: a bottom plug body (1) having a plurality of split petal structures (2) on the top thereof, each of the petal structures (2) being provided with a water inlet circuit (3) and a water return circuit (4) in communication; the bottom plug body (1) is further provided with a water return port (6) and a water inlet port (5) on the bottom thereof, the water inlet port (5) being connected to the water inlet circuit (3) of each of the petal structures (2), and the water return port (6) being connected to the water return circuit (4) of each of the petal structures (2).

2. The crucible bottom plug for use in the floating zone melting according to claim 1, wherein The top of the bottom plug body (1) is uniformly divided into a plurality of petal structures (2) in the circumferential direction.

3. The crucible bottom plug for use in the floating zone melting according to claim 2, wherein The top of the bottom plug body (1) is uniformly divided into 4-16 petal structures (2) in the circumferential direction.

4. The crucible bottom plug for use in the floating zone melting according to claim 2, wherein Each of the petal structures (2) is provided with an independent water inlet circuit (3) and an independent water return circuit (4), the water inlet circuit (3) and the water return circuit (4) being parallel to each other and arranged in the vertical direction, and the water return circuit (4) being arranged outside the water inlet circuit (3).

5. The crucible bottom plug for use in the floating zone melting according to claim 2, wherein Each of the petal structures (2) is provided with an independent water inlet circuit (3) and an independent water return circuit (4), the water inlet circuit (3) and the water return circuit (4) being parallel to each other and arranged in the vertical direction, and the water inlet circuit (3) being arranged outside the water return circuit (4).

6. A crucible bottom plug for use in a suspension smelting process according to claim 4 or 5, characterized in that The top of the water inlet circuit (3) and the top of the water return circuit (4) are in communication.

7. The crucible bottom plug for use in the floating zone melting according to claim 1, wherein The water inlet port (5) and the water return port (6) are arranged on the same side of the bottom of the bottom plug body (1).

8. The crucible bottom plug according to claim 1 or 7, wherein The bottom plug body (1) is further provided with a water inlet pipe (8) connecting the water inlet port (5) and the water inlet circuit (3) and a water return pipe (9) connecting the water return port (6) and the water return circuit (4) below the petal structure (2).

9. A crucible bottom plug for use in a floating zone melting process according to claim 8, characterized in that The water return pipe (9) is arranged outside the water inlet pipe (8) in a surrounding manner. Alternatively, the water inlet pipe (8) is arranged outside the water return pipe (9) in a surrounding manner.

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