A filter

Abstract

The application discloses a filter, which comprises a filter body and a connecting piece, the connecting piece is located at a connecting end of the filter body, the filter body comprises n layers of filter screens and a filtering cavity formed by the n layers of filter screens, the n layers of filter screens are sequentially connected to form n-1 layers of filter hole channels, wherein n is a positive integer greater than or equal to 2, filter holes on two adjacent layers of filter screens are staggered, the two adjacent layers of filter screens are connected through a plurality of connecting columns, and the connecting columns and the staggered filter holes form the filter hole channels. The filter of the application can effectively filter non-metallic inclusions and impurities such as oxides in liquid through the multi-layer filter screens and the staggered filter holes, meanwhile, the filter has a large effective filtering area and a large number of recycling times, so that the internal quality of castings is improved and the yield of low-pressure aluminum alloy castings is improved.

Description

Technical Field

[0001] This application relates to the field of low-pressure casting equipment, and more specifically, to a filter. Background Technology

[0002] Molten liquid metals often contain various oxides and impurities, which affect the metal's crystal structure, ultimately significantly reducing the mechanical properties of the formed metal, such as yield strength and tensile strength. In existing technologies, low-pressure cast aluminum alloys primarily utilize fiber mesh, wire mesh, and some foam ceramic filters and straight-hole press filters for filtration. Fiber mesh filters have short filtration processes; straight-hole press filters have straight channels and low filtration efficiency; foam ceramic filters are prone to breakage during use. All these filters have different shortcomings and cannot completely remove inclusions from the aluminum alloy. Therefore, there is a need in this field for a filter that simultaneously satisfies both filtration efficiency and filtration strength. Utility Model Content

[0003] To address the problems existing in the low-pressure casting process mentioned above, this application provides a filter that can largely remove inclusions.

[0004] The technical solution of this application is as follows:

[0005] 1. A filter, characterized in that the filter comprises a filter body and a connector, the connector being located at the connecting end of the filter body.

[0006] The filter body includes n layers of filter screens and a filter chamber formed by the n layers of filter screens. The n layers of filter screens are connected in sequence to form n-1 layers of filter pore channels, where n is a positive integer greater than or equal to 2. The filter pores on adjacent filter screens are staggered and the adjacent filter screens are connected by multiple connecting posts. The two staggered filter pores on adjacent filter screens are called staggered filter pore groups. The connecting posts and the staggered filter pore groups constitute the filter pore channels.

[0007] 2. The filter according to item 1, characterized in that the number of the staggered filter pore groups is equal to the number of filter pore channels between the two adjacent layers.

[0008] 3. The filter according to item 1, characterized in that the plurality of connecting posts are arranged circumferentially along the filter holes; the two ends of the connecting posts are respectively located on the corresponding filter holes between two adjacent filter screens.

[0009] 4. The filter according to item 1, characterized in that the stagger ratio of filter holes on two adjacent filter screens is 10% to 100%.

[0010] 5. The filter according to item 1, characterized in that the shape of the filter pore is a standard or non-standard circle, ellipse, or m-sided shape, where m is a positive integer greater than or equal to 3, and the pore diameter of the filter pore is 10-30 ppi.

[0011] 6. The filter according to item 1, wherein the filter body can be one or more of the following shapes: spherical, cylindrical, frustum-shaped, or cuboid.

[0012] 7. The filter according to item 1, characterized in that the thickness of the filter body is 18-30 mm.

[0013] 8. The filter according to claim 1, characterized in that the connector includes a connecting unit and a connecting surface, wherein the connecting unit is a hollow column, one end of which is connected to the filter body and the other end of which is connected to the connecting surface.

[0014] 9. The filter according to item 8, characterized in that a connection hole is present on the connection surface.

[0015] The beneficial effects of this application are as follows:

[0016] This application provides a filter that, through a multi-layered filter screen and staggered filter holes, can effectively filter non-metallic inclusions and oxides and other impurities in liquids. At the same time, the filter has a large effective filtration area and can be recycled many times, thus improving the internal quality of castings and increasing the yield of low-pressure aluminum alloy castings. Attached Figure Description

[0017] The accompanying drawings are provided to better understand this application and do not constitute an undue limitation thereof. Wherein:

[0018] Figure 1 This is a cross-sectional view of the front view of the filter;

[0019] Figure 2 This is a front view of the filter;

[0020] Figure 3 This is a top view of the filter.

[0021] Among them, 1 is the filter body, 2 is the connector, 3 is the filter screen, 4 is the connecting column, 5 is the filter channel, 6 is the connecting surface, 7 is the filter hole, 8 is the connecting unit, and 9 is the filter chamber. Detailed Implementation

[0022] The present application is further illustrated below with reference to embodiments. It should be understood that the embodiments are only used to further illustrate and explain the present application and are not intended to limit the present application.

[0023] This application provides a filter, which includes a filter body 1 and a connector 2. The connector 2 is located at the connection end of the filter body. The filter body 1 includes n layers of filter screens 3 and a hollow filter cavity formed by the n layers of filter screens 3. The n layers of filter screens 3 are connected in sequence to form n-1 layers of filter pore channels 5, where n is a positive integer greater than or equal to 2. The filter pores 7 on adjacent layers of filter screens 3 are arranged alternately.

[0024] For example, the filter 3 can have 2, 3, 4, 5, 6, 7, 8, 9, or 10 layers.

[0025] like Figure 1 As shown, the filter chamber 9 is located at the center of the filter body 1. Liquid flows from the outside of the filter body 1 through the filter screen 3, flows inward to the filter chamber 9, is temporarily collected in the filter chamber, and then flows out of the filter chamber 9 via the connector 2.

[0026] In one specific embodiment of this application, the filter screen 3 includes a plurality of filter holes 7, and a connecting post 4 is included between two adjacent filter screens 3, and the filter holes 7 and the connecting post 4 form a filter hole channel 5.

[0027] In one specific embodiment of this application, in the filter, two filter holes 7 arranged alternately on two adjacent filter layers 3 are called an alternating filter hole group. In each alternating filter hole group, two filter holes 7 are respectively located on two adjacent filter layers 3. The adjacent filter layers 3 are connected by multiple connecting posts 4. The connecting posts 4 and the alternating filter hole groups constitute the filter hole channels 5. Therefore, each existence of an alternating filter hole group corresponds to a filter hole channel 5. Thus, the number of alternating filter hole groups is equal to the number of filter hole channels 5 between the two adjacent layers.

[0028] It should also be understood that when the filter holes 7 on the filter screen 3 are far apart from the filter holes 7 on the adjacent filter screen 3, making it difficult to form a connecting column 4, they can also be called staggered filter holes. However, in this case, the staggered filter holes cannot form a filter hole channel 5, so they cannot be called a staggered filter hole group. That is, the staggered filter hole group can definitely form the filter hole channel, and the two filter holes at both ends of the filter hole channel must also be the staggered filter hole group.

[0029] In one specific embodiment of this application, in the filter, a plurality of connecting posts 4 are arranged circumferentially along the filter holes 7; the two ends of the connecting posts 4 are respectively located on the corresponding filter holes 7 between two adjacent filter screens 3, more specifically, the two ends of the connecting posts 4 are respectively located on the edges of the corresponding filter holes 7 between two adjacent filter screens 3. Meanwhile, it should be understood that since the filter holes 7 on the two adjacent filter screens 3 are staggered, the filter hole channels 5 may not be perpendicular to the filter screens 3.

[0030] In one specific embodiment of this application, each filter hole 7 on the filter screen 3 shown may correspond to multiple filter channels 5. It should also be understood that the filter channels 5, except for the filter holes 7 at both ends, may not be completely closed. Liquid can flow from one filter hole 7 through the filter channel 5 to another filter hole 7 in the corresponding filter hole group, or liquid can flow through the gaps between the connecting posts 4 in the filter channel 5 layer and flow out through any filter hole 7. However, it should be understood that the above description is based on the absence of any external pressure, and is intended to describe the incompletely closed state of the filter channels 5.

[0031] By setting the filter channels using the above method, the contact area between the filter and the liquid is increased, allowing the liquid to flow more freely inside the filter body, thus improving the filter's filtration efficiency and adsorption capacity. Furthermore, when the liquid enters the filter chamber through the filter channels, its turbulent flow pattern changes to a horizontal flow pattern, making the liquid flow more stable.

[0032] In this application, the staggered arrangement of filter holes means that when viewed through the filter holes at an angle perpendicular to the filter screen, only a portion of the filter holes on adjacent filter screens can be observed. In this application, the staggered ratio refers to the proportion of the area of ​​the filter holes on adjacent filter screens that can be observed when viewed through the filter holes at an angle perpendicular to the filter screen, relative to the total area of ​​the filter holes. Therefore, in one specific embodiment of this application, the staggered ratio of filter holes on two adjacent filter screens is 10% to 100%, preferably 10% to 50%.

[0033] It should be understood that when the filter holes 7 on filter screen 3 are far apart from the filter holes 7 on adjacent filter screen 3, it is impossible to observe another filter hole on the adjacent filter screen through the filter hole from an angle perpendicular to the filter screen. In this case, it is impossible to calculate the ratio of filter hole overlap.

[0034] In this application, another manifestation of the staggered arrangement of filter pores is that the filter pore channels 5 on adjacent filter pore channel layers are staggered, such as... Figure 1 As shown in number 5, the filter channel 5 on the filter channel layer can be connected to two or more filter channels 5 on adjacent filter channel layers. Therefore, it should be understood that after liquid flows out of another filter hole 7 of the corresponding filter group through the filter channel 5 from one filter hole 7, it can freely flow into two or more filter channels 5 on adjacent filter channel layers.

[0035] By setting the filter holes using the above method, the problem of blocked filter holes and obstructed liquid flow can be effectively prevented. At the same time, the staggered arrangement of filter holes reduces the pore size that the liquid passes through when flowing through multiple layers of filter screen, further improving filtration and adsorption efficiency.

[0036] The shape of the filter hole 7 described in this application can be a shape or graphic, such as a circle, ellipse, m-sided shape, rectangle, trapezoidal part of shape, and other m-sided or irregular shapes, where m is a positive integer greater than or equal to 3. The shape of the filter hole 7 can also be changed according to actual production needs.

[0037] In this application, ppi is porosity density, used to represent the average number of pores per unit inch. In one specific embodiment of this application, the pore size of the filter is 10-30 ppi. For example, the pore size of the filter can be 10 ppi, 11 ppi, 12 ppi, 13 ppi, 14 ppi, 15 ppi, 16 ppi, 17 ppi, 18 ppi, 19 ppi, 20 ppi, 21 ppi, 22 ppi, 23 ppi, 24 ppi, 25 ppi, 26 ppi, 27 ppi, 28 ppi, 29 ppi, or 30 ppi, preferably 10-20 ppi.

[0038] It should be understood that the pore size on each filter layer can be different. For example, a filter layer may contain pores with a pore size of 20 ppi, 15 ppi, or 10 ppi. It should also be understood that the pore size on different filter layers can also be different; for example, one filter layer may have pores with a pore size of 20 ppi, while another filter layer may have pores with a pore size of 15 ppi.

[0039] In one specific embodiment of this application, the filter body 1 can be one or more of the following shapes: spherical, columnar, frustum, and polyhedral, preferably spherical. The shape and size of the filter body 1 can be adjusted according to actual production needs. It should be understood that in the multi-layer filter structure of the filter body 1, each layer of filter 3 can have a different shape. The filter 3 can be one or more of the following shapes: spherical, columnar, frustum, and polyhedral, preferably spherical. For example, the outermost filter 3 can be spherical, and the innermost filter 3 can be decahedral. The shape of the filter cavity 9 is determined by the shape of the innermost filter 3.

[0040] In this application, the thickness of the filter body 1 refers to the overall thickness of the n layers of filter screens 3 and the filter pore channels therein. The thickness of the filter body is 18-30 mm, for example, the thickness of the filter body can be 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm, preferably 20-25 mm.

[0041] In one specific embodiment of this application, the connector 2 includes a connecting unit 8 and a connecting surface 6, wherein the connecting unit 8 is a hollow column, one end of which is connected to the filter body 1 and the other end of which is connected to the connecting surface 6.

[0042] In one specific embodiment of this application, the connecting unit 8 can also be composed of n layers of filter screens 3. That is, the connecting unit 8 is a hollow column with filter screens as sidewalls. The n layers of filter screens are connected sequentially to form n-1 layers of filter pore channels, where n is a positive integer greater than or equal to 2, and the filter pores on adjacent layers of filter screens are arranged alternately. For example, the filter screens can be 2, 3, 4, 5, 6, 7, 8, 9, or 10 layers. After being filtered by the filter screens 3, the liquid flows inward into the filter chamber 9 and is stored in the filter chamber 9, and then flows out through the connector 2. Alternatively, after being filtered by the filter screens 3, the liquid flows out directly through the connector 2. By setting the connector in this way, the contact area between the filter and the liquid and the effective filtration area can be further increased, thus improving the filtration efficiency.

[0043] In one specific embodiment of this application, the connector 2 can be a hollow cylinder, a hollow cube, or other hollow shapes can be selected according to actual production needs. For example, the connector 2 can be a pipe with an arc. For another example, the outermost filter 3 can be a hollow cylinder, and the innermost filter 3 can be a cube.

[0044] In one specific embodiment of this application, the connecting surface 6 has one or more of the following: connecting holes, threads, snap fasteners, and grooves, for connecting with the riser pipe. In another specific embodiment, the connecting surface 6 is a flange with bolt holes. In yet another specific embodiment, the connecting surface 6 has threads, and in yet another specific embodiment, it has snap fasteners. Other connection methods can also be selected for the connecting surface 6 according to actual production needs. This type of connecting surface allows for quick installation or removal of the filter as needed, resulting in a high degree of automation and facilitating filter inspection, replacement, or continuous use. Furthermore, when the connecting surface of the connector has regularly distributed circular holes, it can reduce the stress generated during ceramic sintering and prevent cracks in the ceramic product.

[0045] Example

[0046] This application provides a filter, such as Figure 1As shown, the filter body 1 is spherical, and the filter screen 3 has three layers, thus containing two layers of filter channels. The filter channels 5 of adjacent filter channels are arranged alternately, and the connecting posts 4 are arranged perpendicular to the filter screen 3, so the filter channels 5 are also arranged perpendicular to the filter screen. In this embodiment, all three filter screens 3 are spherical, and the filter cavity 9 is also spherical.

[0047] In this embodiment, the filter channel 5 of the outer filter channel layer is connected to the two filter channels 5 of the inner filter channel layer, and the filter channel 5 is not completely closed, and any filter channel 5 is perpendicular to the cross-section of the filter screen 3.

[0048] like Figure 1 and Figure 2 As shown, the filter pore 7 is a regular hexagon with an interleaving ratio of 25%, the pore diameter is 10ppi, and the thickness of the filter body is 20mm.

[0049] like Figure 1 and Figure 2 As shown, the connector 2 includes a connecting unit 8 and a connecting surface 6. The connecting unit 8 is a hollow cylinder, with one end connected to the filter body 1 and the other end connected to the connecting surface 6. The sidewalls of the connecting unit 8 are solid and not made of filter screen. Figure 3 As shown, the connecting surface 6 is a flange with bolt holes.

[0050] In summary, the filter of this application is used in the following manner. The filter is connected to a riser pipe via a flange on the filter connection surface, and the filter is placed into the liquid along with the riser pipe. During use, under pressure, the liquid passes through the filter holes from the outside, enters the filter chamber inside the filter body sphere via the filter hole channels, and then flows along the connection unit into the riser pipe, achieving both filtration and adsorption effects.

[0051] The filter provided in this application has a large effective filtration area and can be recycled many times. It is easy to connect with the low-pressure equipment when used in low-pressure aluminum alloy casting equipment. It has a high degree of automation and can filter and adsorb inclusions and impurities in molten metal, ensuring the purity of molten metal, improving the internal quality of castings, reducing internal defects in castings, and greatly improving the yield of aluminum alloy castings.

[0052] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A filter, characterized in that, The filter includes a filter body and connectors. The connector is located at the connection end of the filter body. The filter body includes n layers of filter screens and a filter chamber formed by the n layers of filter screens. The n layers of filter screens are connected in sequence to form n-1 layers of filter pore channels, where n is a positive integer greater than or equal to 2. The filter pores on adjacent two layers of filter screens are staggered and the adjacent two layers of filter screens are connected by multiple connecting posts. The two staggered filter pores on adjacent two layers of filter screens are called staggered filter pore groups. The connecting posts and the staggered filter pore groups constitute the filter pore channels. The connector includes a connecting unit and a connecting surface, wherein the connecting unit is a hollow column, one end of which is connected to the filter body and the other end is connected to the connecting surface; The filter chamber is located at the center of the filter body. The shape of the filter chamber is determined by the shape of the innermost filter screen. The connecting surface has one or more of the following: connecting holes, threads, snaps, and grooves.

2. The filter according to claim 1, characterized in that, The number of staggered filter pore groups is equal to the number of filter pore channels between two adjacent layers.

3. The filter according to claim 1, characterized in that, The multiple connecting posts are arranged circumferentially along the filter holes; the two ends of the connecting posts are respectively located on the corresponding filter holes between two adjacent filter layers.

4. The filter according to claim 1, characterized in that, The staggered ratio of filter holes on two adjacent filter layers is 10% to 100%.

5. The filter according to claim 1, characterized in that, The filter pores are in the shape of standard or non-standard circles, ellipses, or m-sided shapes, where m is a positive integer greater than or equal to 3, and the pore diameter is 10-30 ppi.

6. The filter according to claim 1, characterized in that, The filter body can be one or more shapes, such as spherical, cylindrical, frustum-shaped, or cuboid.

7. The filter according to claim 1, characterized in that, The thickness of the filter body is 18-30mm.

Images