A multiple filtration ceramic filter assembly and casting line

Abstract

A multiple filtering ceramic filter combination structure and a casting processing line; the ceramic filter combination structure comprises: a ceramic core and a foam ceramic assembly; the ceramic core is provided with a containing cavity with an opening facing upward, and the bottom of the containing cavity is provided with a filtering hole; a plurality of foam ceramic assemblies are stacked in one body from high to low and are arranged in the containing cavity; each foam ceramic assembly corresponds to a specification of ceramic filter; the ceramic support seat is provided with a ceramic cavity which is hollow upward and downward; the ceramic filter is installed in the ceramic cavity; the ceramic support seats of the plurality of foam ceramic assemblies are sequentially stacked, the ceramic cavities of the plurality of ceramic support seats are communicated with each other, and the filtering hole is coaxially aligned with the ceramic cavity of the lowermost ceramic support seat. The scheme avoids the situation that the lower ceramic filter is easily pressed and the outer edge of the ceramic filter is easily broken when a plurality of ceramic filters are used in combination.

Description

Technical Field

[0001] This utility model relates to the field of ceramic filters, and in particular to a multi-stage ceramic filter assembly structure and casting processing line. Background Technology

[0002] Some metal products are typically cast and then polished. Since molten metal often contains air bubbles and impurities, a filtration device with high-temperature resistance and impact resistance is required in the casting mold. Foam ceramic filters are made from a porous sponge matrix through molding and firing. Their high porosity effectively removes impurities from the molten metal. Generally, existing technologies use only a single type of foam ceramic filter for filtration. However, the impurities in the molten metal have complex physical parameters and chemical compositions, and a single foam ceramic filter can only filter some of them. Existing technologies also directly stack multiple foam ceramic filters together. However, the contact area between the upper and lower foam ceramic filters is non-planar, and the uppermost foam ceramic filter is impacted by the molten metal. The lowermost foam ceramic filter is subjected to the pressure of the multiple filters above it. This can easily lead to displacement of the foam ceramic filters during casting, resulting in low filtration efficiency. It can also easily cause the edge structure of the foam ceramic to crack and form residues. These residues can cause collision damage between the polishing wheel and ceramic particles during subsequent polishing processes. Utility Model Content

[0003] The purpose of this invention is to propose a multi-filtration ceramic filter assembly structure, which stacks foam ceramic assemblies in the cavity of a ceramic core. Each foam ceramic assembly corresponds to a ceramic filter of a certain specification. Multiple ceramic filters can be combined and applied to filtration processes. The ceramic support provides support and protection for the ceramic filters.

[0004] This invention also proposes a casting processing line that uses the aforementioned multi-stage ceramic filter combination structure.

[0005] To achieve this objective, the present invention adopts the following technical solution: A multi-stage filtration ceramic filter assembly structure includes: a ceramic core and a foam ceramic assembly; The ceramic core has an upward-facing receiving cavity, and the bottom of the receiving cavity has filter holes; multiple foam ceramic assemblies are stacked together from high to low and disposed in the receiving cavity; The foam ceramic assembly includes: a ceramic filter and a ceramic support base; Each of the foam ceramic assemblies corresponds to one specification of the ceramic filter; The ceramic support base has a hollowed-out ceramic cavity at the top and bottom; the ceramic filter is installed in the ceramic cavity; the ceramic support bases of multiple foam ceramic assemblies are stacked in sequence, the ceramic cavities of the multiple ceramic support bases are interconnected, and the filter holes are coaxially aligned with the ceramic cavity of the bottommost ceramic support base.

[0006] Optimally, the bottom of the ceramic cavity is provided with a base support, the middle of which exposes the opening of the ceramic cavity; the lower outer edge of the ceramic filter contacts the upper surface of the base support; for two adjacent ceramic supports, the ceramic support located above the other contacts the upper end of the ceramic support located below the other through the lower surface of the base support.

[0007] Alternatively, the inner ring of the base is provided with a downwardly oriented flow guide slope, which is inclined toward the center of the ceramic filter below.

[0008] Optimally, an assembly gap is formed between the outer side of the ceramic filter and the inner sidewall of the ceramic cavity; the lower assembly gap is vertically located directly below the upper base.

[0009] Optimally, the upper surface of the ceramic filter is close to or horizontally aligned with the opening of the ceramic cavity.

[0010] Optimally, it may also include: a retaining ring; The retaining ring is detachably installed at the opening of the receiving cavity; the inner ring of the retaining ring protrudes from the receiving cavity; the retaining ring covers the outer edges of both the uppermost ceramic filter and the ceramic support.

[0011] Optimally, the opening of the receiving cavity is provided with a receiving recess; the fixing ring is located in the receiving recess.

[0012] Alternatively, the plurality of filter holes may be arranged in a hexagonal array on the bottom wall of the receiving cavity.

[0013] Alternatively, the ceramic filter can be a silicon carbide filter.

[0014] A casting processing line is provided with the above-mentioned multi-stage ceramic filter combination structure.

[0015] Compared with the prior art, one of the above technical solutions has the following beneficial effects: This solution provides a multi-stage ceramic filter assembly structure, which stacks foam ceramic assemblies in the cavity of a ceramic core. Each foam ceramic assembly corresponds to a ceramic filter of a certain specification. Multiple ceramic filters can be combined and applied to filtration. The ceramic support provides support and protection for the ceramic filters, thereby avoiding the situation where the lower ceramic filter is easily compressed and the outer edge of the ceramic filter is easily broken when multiple ceramic filters are used in combination. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the ceramic filter assembly structure; Figure 2 This is an exploded structural diagram of one embodiment of the ceramic filter assembly structure; Figure 3 This is a cross-sectional structural diagram of one embodiment of the ceramic filter assembly structure; Figure 4 yes Figure 3 Enlarged view of section A.

[0017] in: 1. Ceramic core; 2. Foam ceramic assembly; 3. Retaining ring; Receiving cavity 11; Filter hole 12; Receiving recess 13; Ceramic filter 21, ceramic support base 22; Ceramic cavity 221; base 222; flow guide slope 223; assembly gap 224. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0020] like Figure 1-4 A multi-stage ceramic filter assembly structure includes: a ceramic core 1 and a foam ceramic assembly 2; The ceramic core 1 has an upward-facing receiving cavity 11, and the bottom of the receiving cavity 11 has a filter hole 12; multiple foam ceramic assemblies 2 are stacked together from high to low and disposed in the receiving cavity 11; The foam ceramic assembly 2 includes: a ceramic filter 21 and a ceramic support 22; Each of the foam ceramic assembly 2 corresponds to a ceramic filter 21 of a certain specification; The ceramic support 22 is provided with a ceramic cavity 221 with upper and lower hollows; the ceramic filter 21 is installed in the ceramic cavity 221; the ceramic support 22s of multiple foam ceramic assemblies 2 are stacked in sequence, the ceramic cavities 221 of the multiple ceramic support 22s are interconnected, and the filter hole 12 is coaxially aligned with the ceramic cavity 221 of the lowest ceramic support 22.

[0021] This solution provides a multi-filtration ceramic filter combination structure, in which foam ceramic assemblies 2 are stacked in the receiving cavity 11 of the ceramic core 1. Each foam ceramic assembly 2 corresponds to a ceramic filter 21 of a certain specification. Multiple ceramic filters 21 can be combined and applied to filtration. The ceramic support 22 provides support and protection for the ceramic filters 21, thereby avoiding the situation where the lower ceramic filter 21 is easily compressed and the outer edge of the ceramic filter 21 is easily broken when multiple ceramic filters 21 are used in combination.

[0022] Specifically, the ceramic core 1 has a receiving cavity 11, the opening of which is located at the top, and a filter hole 12 at the bottom. The number of foam ceramic assemblies 2 is at least two, with multiple foam ceramic assemblies 2 stacked together and respectively disposed in the receiving cavity 11. Each foam ceramic assembly 2 has a ceramic filter 21 and a ceramic support 22. The ceramic filter 21 is disposed in the ceramic cavity 221 of the ceramic support 22. The stacking of the foam ceramic assemblies 2 mainly relies on the ceramic support 22 being stacked from high to low, with the lower end of the upper ceramic support 22 abutting the upper end of the lower ceramic support 22. The lower end of the upper ceramic support 22 in the ceramic cavity 221 is connected to the upper end of the lower ceramic support 22 in the ceramic cavity 221. During assembly, the ceramic filter 21 can be pre-installed in the ceramic cavity 221 of the ceramic support 22, and the components are assembled separately. Multiple foam ceramic assemblies 2 are synthesized, and each foam ceramic assembly 2 is placed sequentially into the receiving cavity 11 through the opening, thereby distributing the ceramic filters 21 from high to low. Each foam ceramic assembly 2 in this scheme can correspond to a ceramic filter 21 of a certain specification. The ceramic filters 21 of each foam ceramic assembly 2 can be different in terms of specifications, such as having different porosities, different thicknesses, different compositions, etc. The application of ceramic filters 21 is more flexible. Different specifications of ceramic filters 21 can be used in combination as needed. For example, the upper foam ceramic assembly 2 can use ceramic filters 21 with larger porosities to remove large particulate impurities first, while the lower foam ceramic assembly 2 can use ceramic filters 21 with smaller porosities to handle finer contaminants. During maintenance, only the ceramic filters 21 with a shorter service life need to be replaced.

[0023] During filtration, the liquid enters the receiving cavity 11 through the opening and passes sequentially through the stacked ceramic cavities 221 and their ceramic filters 21, before flowing out through the filter holes 12 of the receiving cavity 11. Since the ceramic filters 21 are not in direct contact with each other, the ceramic filters 21 are mainly supported by the ceramic support base 22. The bottom ceramic filter 21 is not subjected to pressure from the stacked foam ceramic assembly 2 above, thus maintaining the structural stability of the multi-layer ceramic filter 21. At the same time, when the liquid passes through the foam ceramic assembly 2, the sidewall of the ceramic cavity 221 shares the impact force of the liquid on the ceramic filter 21, protecting the edges of the ceramic filter 21 and preventing it from breaking.

[0024] Optimally, the bottom of the ceramic cavity 221 is provided with a base support 222, and the middle part of the base support 222 exposes the opening of the ceramic cavity 221; the lower outer edge of the ceramic filter 21 contacts the upper surface of the base support 222; for two adjacent ceramic support seats 22, the ceramic support seat 22 located above the other contacts the upper end of the ceramic support seat 22 located below the other through the lower surface of the base support 222.

[0025] A base support 222 is provided at the bottom of the ceramic cavity 221. The base support 222 supports the ceramic filter 21, and the lower outer edge of the ceramic filter 21 contacts the base support 222, thereby fixing it to the ceramic cavity 221. In addition, the base support 222 is also cleverly used in the stacking structure of the foam ceramic assembly 2. Since the ceramic supports 22 are stacked on top of each other, the upper ceramic support 22 contacts the upper end of the lower ceramic support 22 through the lower surface of the base support 222. The base support 222 can increase the contact area between the ceramic supports 22 and maintain the stacking stability of the ceramic supports 22. The base support 222 of the ceramic support 22 located at the bottom of the stacking sequence contacts the bottom wall of the receiving cavity 11.

[0026] Alternatively, the inner ring of the base 222 may be provided with a downwardly oriented guide slope 223, which is inclined toward the center of the ceramic filter 21 below.

[0027] The inner ring of the base 222 has a downward-sloping guide slope 223. The guide slope 223 is inclined towards the middle of the ceramic filter 21. When liquid is discharged from the ceramic cavity 221 of each ceramic support 22, it falls onto the base 222. When the guide slope 223 of the base 222 comes into contact with the liquid, the liquid moves along the inclined direction of the guide slope 223, thereby guiding the liquid to flow obliquely towards the middle of the ceramic filter 21, so that the liquid flows away from the outer edge of the ceramic filter 21, and the liquid flows through multiple foam ceramic assemblies 2 in sequence. The guide slope 223 of the lowest ceramic support 22 faces the filter hole 12, which can concentrate the liquid flow to the filter hole 12.

[0028] Optimally, an assembly gap 224 is formed between the outer side of the ceramic filter 21 and the inner sidewall of the ceramic cavity 221; the lower assembly gap 224 is vertically located directly below the upper base 222.

[0029] To facilitate the installation and removal of the ceramic filter 21 within the ceramic cavity 221, an assembly gap 224 is appropriately provided between the ceramic filter 21 and the inner wall of the ceramic cavity 221, meaning the outer diameter of the ceramic filter 21 is slightly smaller than the inner diameter of the ceramic cavity 221. To prevent liquid from flowing through the assembly gap 224, the assembly gap 224 of the lower foam ceramic assembly 2 is vertically aligned with the base 222 of the upper foam ceramic assembly 2 between two adjacent foam ceramic assemblies 2, meaning the lower assembly gap 224 is vertically located between the inner and outer rings of the upper base 222. Between the rings, the cross-sectional area of ​​the base 222 is larger than the cross-sectional area of ​​the assembly gap 224. The base 222 covers the area between the outer edge of the upper end of the ceramic filter 21 and the assembly gap 224. When the ceramic filter assembly structure filters liquid, the liquid falls from top to bottom. The base 222 blocks the assembly gap 224 between the outer side of the ceramic filter 21 and the inner wall of the ceramic cavity 221. The liquid will flow out along the inclined direction of the guide slope 223, thereby preventing the liquid from falling directly along the inner wall of the ceramic cavity 221 and improving the filtration stability of each foam ceramic assembly 2.

[0030] Optimally, the upper surface of the ceramic filter 21 is close to or horizontally aligned with the opening of the ceramic cavity 221.

[0031] The upper surface of the ceramic filter 21 is preferably infinitely close to the opening at the upper end of the ceramic cavity 221. Since the upper ceramic support 22 contacts the upper end of the lower ceramic support 22 through the base 222, and the upper surface of the ceramic filter 21 of the lower ceramic support 22 is close to the opening of the ceramic cavity 221, the base 222 is infinitely close to the upper surface of the ceramic cavity 221. This makes the structure between the foam ceramic assemblies 2 more compact, minimizes the gap when liquid passes between the foam ceramic assemblies 2, and increases the filtration efficiency of the ceramic filter assembly structure. At the same time, this structure also reduces the gap between the lower surface of the upper base 222 and the upper surface of the ceramic filter 21, thereby reducing the probability of liquid entering the assembly gap 224.

[0032] Optimally, it also includes: a retaining ring 3; The fixing ring 3 is detachably installed in the opening of the receiving cavity 11; the inner ring of the fixing ring 3 is exposed in the receiving cavity 11; the fixing ring 3 covers the outer edges of both the uppermost ceramic filter 21 and the ceramic support 22.

[0033] The fixing ring 3 is installed in the opening above the receiving cavity 11. The inner and outer rings of the fixing ring 3 are located directly above the outer edge of the uppermost ceramic filter 21 and the outer edge of the ceramic support 22. This can shield the outer edge of the uppermost ceramic filter 21 and the outer edge of the ceramic support 22, thereby preventing the outer edge of the ceramic filter 21 from being broken by impact and also preventing the ceramic support 22 from entering the receiving cavity 11 from the outer edge.

[0034] Alternatively, the opening of the receiving cavity 11 may be provided with a receiving recess 13; the fixing ring 3 may be located within the receiving recess 13.

[0035] The receiving recess 13 is used to install the retaining ring 3, so that the retaining ring 3 is confined to the opening of the receiving cavity 11, thereby covering the outer edge of the uppermost ceramic filter 21.

[0036] Alternatively, the plurality of filter holes 12 may be arranged in a hexagonal array on the bottom wall of the receiving cavity 11.

[0037] The bottom wall of the receiving cavity 11 has filter holes 12 arranged in a hexagonal array. The gap between the filter holes 12 can be further reduced to improve the space utilization of the bottom wall of the receiving cavity 11.

[0038] Alternatively, the ceramic filter 21 can be a silicon carbide filter.

[0039] Silicon carbide filters are primarily made of silicon carbide, which can operate stably in air at temperatures exceeding 1600°C. Its oxidation resistance far surpasses that of traditional ceramic materials (such as alumina ceramics). This characteristic makes it suitable for molten metal filtration, maintaining structural integrity and filtration accuracy even at high temperatures.

[0040] A casting processing line is provided with the above-mentioned multi-stage ceramic filter combination structure.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-stage ceramic filter assembly structure, characterized in that, include: Ceramic core and foam ceramic assembly; The ceramic core has an upward-facing receiving cavity, and the bottom of the receiving cavity has a filter hole; Multiple foam ceramic assemblies are stacked together from high to low and disposed in the receiving cavity; The foam ceramic assembly includes: a ceramic filter and a ceramic support base; Each of the foam ceramic assemblies corresponds to one specification of the ceramic filter; The ceramic support base has a hollowed-out ceramic cavity at the top and bottom; the ceramic filter is installed in the ceramic cavity; the ceramic support bases of multiple foam ceramic assemblies are stacked in sequence, the ceramic cavities of the multiple ceramic support bases are interconnected, and the filter holes are coaxially aligned with the ceramic cavity of the bottommost ceramic support base.

2. The multi-stage ceramic filter assembly structure according to claim 1, characterized in that, The bottom of the ceramic cavity is provided with a base support, and the opening of the ceramic cavity is exposed in the middle of the base support; the lower outer edge of the ceramic filter contacts the upper surface of the base support; for two adjacent ceramic support seats, the ceramic support seat located above the other contacts the upper end of the ceramic support seat located below the other through the lower surface of the base support.

3. The multi-stage ceramic filter assembly structure according to claim 2, characterized in that, The inner ring of the base is provided with a downward-sloping guide slope, which is inclined toward the middle of the ceramic filter below.

4. The multi-stage ceramic filter assembly structure according to claim 3, characterized in that, An assembly gap is formed between the outer side of the ceramic filter and the inner wall of the ceramic cavity; the lower assembly gap is vertically located directly below the upper base.

5. The multi-stage ceramic filter assembly structure according to claim 4, characterized in that, The upper surface of the ceramic filter is close to or horizontally aligned with the opening of the ceramic cavity.

6. The multi-stage ceramic filter assembly structure according to claim 1, characterized in that, Also includes: retaining ring; The retaining ring is detachably installed at the opening of the receiving cavity; the inner ring of the retaining ring protrudes from the receiving cavity; the retaining ring covers the outer edges of both the uppermost ceramic filter and the ceramic support.

7. The multi-stage ceramic filter assembly structure according to claim 6, characterized in that, The opening of the receiving cavity is provided with a receiving recess; the fixing ring is located in the receiving recess.

8. The multi-stage ceramic filter assembly structure according to claim 1, characterized in that, The plurality of filter holes are arranged in a hexagonal array on the bottom wall of the receiving cavity.

9. A multi-stage ceramic filter assembly structure according to any one of claims 1-8, characterized in that, The ceramic filter is a silicon carbide filter.

10. A casting processing line, characterized in that, A ceramic filter assembly structure with multiple filtration as described in any one of claims 1-9 is provided.

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