High-pressure-resistant melt filtering disc capable of being repeatedly cleaned

Abstract

The utility model discloses a kind of high pressure-bearing repeatable cleaning formula melt filter disc, it is related to filter disc piece technical field, including support frame and filter sheet;Several extension connecting rods are made on the support frame, and connecting rod divides the horizontal plane where support frame is located into several independent areas;The filter sheet is composed of the superposition of multiple independent metal layers according to specific order, and different metal layers have different density of aperture and / or three-dimensional structure, and the filter sheet has the ability to filter impurities in melt;Each area formed by connecting rod division is provided with an independent filter sheet, and each filter sheet is movably connected with connecting rod to be replaced and cleaned individually;The utility model can facilitate the cleaning process of filter disc, realize the repeated use of filter disc.

Description

Technical Field

[0001] This utility model relates to the field of filter disc technology, specifically a high-pressure, repeatedly washable melt filter disc. Background Technology

[0002] In the production of polymer products, when the polymer masterbatch is melted from solid to liquid, there will be unmelted particles, impurities, and non-liquid dopants such as gel-like materials. These dopants reduce the cleanliness of the polymer melt and will cause pipeline blockage, product defects and scrapping and other adverse consequences in subsequent production processes such as melt transportation and extrusion.

[0003] Existing technologies use melt filter discs to filter high-viscosity melts. These discs feature a three-dimensional mesh-like porous structure with high porosity, large surface area, and is made of high-temperature resistant materials, enabling thorough filtration of high-temperature, high-viscosity melts. However, after filtering and intercepting impurities for a period, the pores of the melt filter disc become clogged, reducing melt throughput and significantly slowing down the filtration process, thus impacting production efficiency. Furthermore, the filter screens in existing melt filter discs are often fixedly mounted on a filter support, and the filter layer structure cannot be disassembled. The filter surface is also obstructed by the support, making thorough cleaning difficult and leaving dirt on the screen. Over time, this buildup of dirt eventually leads to an irreversible decrease in filter throughput, requiring replacement with a new, complete filter disc to restore filtration efficiency, which incurs significant economic costs. Utility Model Content

[0004] To address the problem mentioned in the background art that existing melt filter discs cannot be disassembled and are difficult to clean, a high-pressure, reusable melt filter disc is proposed. The filter screen can be disassembled and cleaned separately, making the cleaning and maintenance of the melt filter disc convenient.

[0005] This utility model discloses a high-pressure, reusable, washable melt filter disc, comprising a support frame and filter discs. The support frame has several extending connecting rods that divide the horizontal plane of the support frame into several independent regions. The filter discs are composed of multiple independent metal layers stacked in a specific order, with different metal layers having different pore sizes and / or three-dimensional structures. The filter discs have the ability to filter impurities in the melt. Each region formed by the connecting rods contains an independent filter disc, and each filter disc is detachably connected to the connecting rod for individual replacement and cleaning.

[0006] As a further improvement of this utility model, the support frame also includes a ring seat, and a number of connecting rods are arranged at the same angular intervals on the horizontal outer side of the ring seat. The ends of all connecting rods are fixedly connected to the outer circumferential surface of the ring seat. The connecting rods divide the horizontal space on the outer side of the ring seat into a number of fan-shaped areas.

[0007] As a further improvement of this utility model, the outer periphery of the ring seat is recessed towards the ring center to form a ring seat groove. Each connecting rod has an embedding groove on both sides along the length direction. The filter sheet is slidably embedded in the embedding groove on both sides. The bottom end of the filter sheet has the same arc contour as the ring seat groove and abuts against the ring seat groove.

[0008] As a further improvement of this utility model, the bottom of the annular groove is provided with evenly spaced connecting holes along the horizontal radial direction of the annular seat, and the connecting holes horizontally penetrate the annular seat.

[0009] As a further improvement of this utility model, the filter sheet includes a protective layer, a filter layer, a separation layer, and a support layer; the protective layer is located on the outermost side of the filter sheet and has a uniform mesh structure to resist the flow impact of melt and impurities; the filter layer is disposed on the inner side of the protective layer, the mesh size of the filter layer is smaller than that of the protective layer, and the mesh of the filter layer and the mesh of the protective layer are staggered; the separation layer is located on the inner side of the filter layer, and the mesh gap is larger than that of the filter layer; the support layer is located on the innermost side of the filter sheet and has the largest mesh gap; the interlayer pore size of the filter sheet changes in a gradient from the outside to the inside, first decreasing and then increasing.

[0010] As a further improvement of this utility model, an edge band is provided on the outer edge of the filter sheet, which fixes and clamps the edges of different metal layers on the filter sheet together; when the filter sheet is installed, the edge band engages and abuts with the installation groove.

[0011] As a further improvement of this utility model, a sealing ring is fixedly connected to the upper side of the connecting rod. The sealing ring is wrapped around both the fixed end and the non-fixed end of the connecting rod, and the sealing ring is in contact with the surface of the filter disc. When multiple filter discs are stacked and combined, the sealing ring on the lower filter disc abuts against the surface of the filter disc on the lower side of the upper filter disc to seal the gap between the ring seats on the adjacent filter discs.

[0012] As a further improvement of this utility model, it also includes a discharge pipe, which is inserted through the center of the support frame. The wall of the discharge pipe has uniform holes to allow the melt filtered by the filter disc to flow into the discharge pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The melt filter disc of this invention is composed of multiple individual filter discs. When there are too many impurities on the filter disc, the filter disc can be directly removed from the filter disc for cleaning, without having to disassemble the entire filter element, thus simplifying the disassembly and assembly process. During cleaning, only the dirty filter discs can be removed for cleaning, while the clean filter discs do not require unnecessary disassembly and assembly. The multiple metal layers of the filter disc are clamped on both sides by edge strips and pressed tightly at the inner and outer ends by sealing strips, realizing the detachable connection of the multiple metal layers. During filter disc cleaning, each layer can be disassembled for cleaning, achieving a thorough cleaning of the filter disc. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the filter disc of this utility model;

[0016] Figure 2 This is a schematic diagram of the upper and lower sides of the filter disc of this utility model;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0018] Figure 4 This is a schematic diagram showing the disassembly of the filter disc on the filter disk of this utility model.

[0019] Figure 5 for Figure 4 Cross-sectional view of the filter disc in the BB direction;

[0020] Figure 6 This is a schematic diagram of the interlayer structure of the filter.

[0021] Figure 7 This is a structural diagram of the ring seat and connecting rod on the support frame;

[0022] Figure 8 This is a schematic diagram of filter discs stacked on top of each other and installed on the outer periphery of the discharge pipe (the upper right corner of the diagram shows a cross-sectional view of the filter discs stacked in the CC direction).

[0023] 1. Support frame; 11. Ring seat; 111. Ring seat groove; 1111. Connecting hole; 12. Connecting rod; 121. Embedding groove; 122. Outer sealing strip; 123. Inner sealing strip; 2. Filter sheet; 20. Edge banding strip; 21. Protective layer; 22. Filter layer; 23. Separation layer; 24. Support layer; 3. Discharge pipe. Detailed Implementation

[0024] Specific Implementation Example 1: Please refer to the appendix Figure 1 -Appendix Figure 7

[0025] A high-pressure, reusable melt filter disc includes a support frame 1 and a filter disc 2.

[0026] The support frame 1 includes a ring seat 11 and a connecting rod 12. The ring seat 11 is a ring-shaped metal frame, such as... Figure 7 As shown, at the middle height of the outer circumference of the ring seat 11, a recess is formed towards the center, creating a ring seat groove 111. A connecting hole 1111 is provided at the bottom of the ring seat groove 111, penetrating both sides of the arcuate wall of the ring seat groove 111 along the horizontal radial direction of the ring seat 11. There are a total of 80 connecting holes 1111, arranged circumferentially at equal intervals at the bottom of the ring seat groove 111. The connecting rod 12 is located at the same horizontal height as the ring seat 11, and one end of the connecting rod 12 is fixedly connected to the outside of the ring seat 11. There are a total of 8 connecting rods 12, arranged circumferentially around the outside of the ring seat 11 at equal intervals. The longitudinal axis of each connecting rod 12 is located on the radial extension line of the ring seat 11. The horizontal space outside the ring seat 11 is evenly divided into 8 fan-shaped areas by the connecting rods 12. Figure 7 As shown, at the midpoint of the vertical walls on both sides of the connecting rod 12, an embedding groove 121 is provided along the length extension direction of the connecting rod 12, and the embedding groove 121 extends through both ends of the connecting rod 12.

[0027] The filter element 2 includes an edge strip 20 and a metal filter layer, the metal filter layer including a protective layer 21, a filter layer 22, a separation layer 23, and a support layer 24. Figure 3 , Figure 5 and Figure 6 As shown, the metal filter layer has a total of 8 layers. The upper 4 layers are symmetrical about the middle plane to the lower 4 layers. All 4 different metal layers have a uniform mesh structure. From the outside to the inside, the outermost layer is the protective layer 21. The protective layer 21 is the first to contact the melt during filtration and is used to resist the flow impact of the melt. The filter layer 22 is arranged adjacent to the inner side of the protective layer 21. The filter layer 22 has the smallest mesh structure and is responsible for the main impurity filtration function. The separation layer 23 is arranged adjacent to the inner side of the filter layer 22. The mesh gap of the separation layer 23 is larger than that of the filter layer 22 and is used to guide and divert the melt that has passed through the filter layer 22. The support layer 24 is arranged inside the separation layer 23, that is, in the middle of the filter sheet 2. The mesh gap of the support layer 24 is the largest among the 4 metal mesh layers and has the thickest metal mesh fibers. It is used to support the outer metal layers and form gaps that allow the melt to pass through easily. The mesh of the four metal layers is staggered, with the mesh spacing gradually decreasing and then increasing from the outside to the inside. Filter 2 is cut to form the shape of a fan-shaped area on the outer side of the matching ring seat, such as... Figure 3As shown, at the radial edges on both sides of the filter sheet 2, eight metal layers are flattened and stacked together, and the flattened areas are uniformly clamped and fixed by the edge banding strip 20. The vertical thickness of the filter sheet 2 at the edge banding strip 20 matches the vertical groove width of the embedded groove 121, and the thickness of the inner short arc edge of the filter sheet 2 matches the vertical thickness of the annular seat groove 111, as shown. Figure 3 and Figure 4 As shown, the two sides of the filter element 2 are slidably embedded in the mounting grooves 121 of the connecting rod 12(a) and the connecting rod 12(b). The inner short arc edge of the filter element 2 is abutted and snapped into the groove 111 of the ring seat. When the filter element 2 needs to be cleaned, a specific dirty filter element 2 can be removed, the metal filter layer can be separated for cleaning, and the filter element can be reassembled after cleaning to achieve repeated cleaning and use of the filter element.

[0028] Furthermore, the connecting rod 12 also includes a sealing pressure ring, such as... Figure 2 and Figure 5 As shown, the sealing ring includes an outer sealing strip 122 and an inner sealing strip 123. The outer sealing strip 122 is fixedly connected to the outer non-fixed end of the eight connecting rods 12, and the diameter of the outer sealing strip 122 matches the outer edge of the filter 2 after installation. The inner sealing strip 123 is fixed to the inner fixed end of the eight connecting rods 12, close to the outer side of the ring seat 11. Both the outer sealing strip 122 and the inner sealing strip 123 are located on the upper side of the connecting rods 12, and the lower surfaces of the outer sealing strip 122 and the inner sealing strip 123 abut against the outermost protective layer 21 of the filter 2.

[0029] Specific Implementation Example 2: Please refer to the appendix Figure 8 Based on the first specific embodiment, the melt filter discs can be stacked and installed to form a multi-layer filter element structure. The assembled melt filter discs are fitted and installed around the outer periphery of the discharge pipe 3, which has uniform holes on the pipe wall.

[0030] Working principle:

[0031] When melt filter discs are stacked into filter cartridges, such as Figure 8As shown in the upper right corner, the vertical thickness of the outer sealing strip 122 and the inner sealing strip 123 is greater than the combined thickness of the upper and lower ring seats 11 on adjacent sides above the filter element 2. The sealing ring on the lower filter disc abuts and presses against the surface of the filter element 2 on the lower side of the upper filter disc. The inner sealing strip 123 blocks the gap of the ring seats 11 on adjacent filter discs, preventing the molten material from directly entering the inner side of the ring seats 11. The radius of the outer sealing strip 122 is greater than the outer arc radius of the filter element 2. The outer wall of the outer sealing strip 122 forms a circumferential protrusion beyond the edge of the filter element 2, which can form an abutment fit with the inner wall of the cavity during filter disc installation, preventing the molten material from directly entering from the outer edge of the filter element. In addition, after the outer sealing strip 122 and the inner sealing strip 123 overlap and press against the surface of the filter element 2, they prevent the horizontal sliding movement of the filter element 2, preventing the filter element 2 from slipping off during filtration.

[0032] The above description is only a preferred embodiment of the present utility model and is intended to illustrate the principle and effect of the present utility model, and is not intended to limit the present utility model. All variations, modifications and substitutions within the spirit and principle of the present design are within the protection scope of the present utility model.

Claims

1. A high-pressure, reusable, washable melt filter disc, characterized in that: It includes a support frame (1) and a filter (2); the support frame (1) is provided with several connecting rods (12) extending in a certain direction, and the connecting rods (12) divide the horizontal plane where the support frame (1) is located into several independent areas; the filter (2) is composed of multiple independent metal layers stacked in a specific order, and different metal layers have different pore sizes and / or three-dimensional structures, and the filter (2) has the ability to filter impurities in the melt; each area divided by the connecting rods (12) is provided with an independent filter (2), and each filter (2) is movably and detachably connected to the connecting rods (12) for individual replacement and cleaning.

2. The high-pressure, reusable, washable melt filter disc according to claim 1, characterized in that: The support frame (1) also includes a ring seat (11), and several connecting rods (12) are arranged at the same angle on the horizontal outer side of the ring seat (11). The ends of all connecting rods (12) are fixedly connected to the outer circumferential surface of the ring seat (11). The connecting rods (12) divide the horizontal space outside the ring seat (11) into several fan-shaped areas.

3. The high-pressure, reusable, washable melt filter disc according to claim 2, characterized in that: The outer periphery of the ring seat (11) is recessed towards the center of the ring, forming a ring seat groove (111). Each connecting rod (12) has an embedding groove (121) on both sides along the length direction. The filter sheet (2) is slidably embedded in the embedding groove (121) on both sides. The bottom end of the filter sheet (2) has the same arc profile as the ring seat groove (111) and abuts against the ring seat groove (111).

4. A high-pressure, reusable, washable melt filter disc according to claim 3, characterized in that: The bottom of the groove (111) of the ring seat has a connecting hole (1111) arranged evenly at intervals along the horizontal radial direction of the ring seat (11), and the connecting hole (1111) passes through the ring seat (11) horizontally.

5. A high-pressure, reusable, washable melt filter disc according to claim 1, characterized in that: The filter (2) includes a protective layer (21), a filter layer (22), a separation layer (23), and a support layer (24). The protective layer (21) is located on the outermost side of the filter (2) and has a uniform mesh structure to resist the flow impact of melt and impurities. The filter layer (22) is provided on the inner side of the protective layer (21). The mesh size of the filter layer (22) is smaller than that of the protective layer (21), and the mesh of the filter layer (22) and the mesh of the protective layer (21) are arranged alternately. The separation layer (23) is located on the inner side of the filter layer (22) and the mesh gap is larger than that of the filter layer (22). The support layer (24) is located on the innermost side of the filter (2) and has the largest mesh gap. The interlayer pore size of the filter (2) changes from the outside to the inside in a gradient that first decreases and then increases.

6. A high-pressure, reusable, washable melt filter disc according to claim 3, characterized in that: An edge band (20) is provided on the outer edge of the filter (2). The edge band (20) fixes and clamps the edges of different metal layers on the filter (2) together. When the filter (2) is installed, the edge band (20) fits and abuts against the mounting groove (121).

7. A high-pressure, reusable, washable melt filter disc according to claim 2, characterized in that: A sealing ring is fixedly connected to the upper side of the connecting rod (12). The sealing ring is wrapped around both the fixed end and the non-fixed end of the connecting rod (12) and fits against the surface of the filter disc (2). When multiple filter discs are stacked and combined, the sealing ring on the lower filter disc abuts against the surface of the filter disc (2) on the lower side of the upper filter disc to seal the gap between the ring seat (11) on the adjacent filter discs.

8. A high-pressure, reusable, washable melt filter disc according to claim 1, characterized in that: It also includes a discharge pipe (3), which is installed in the center of the support frame (1). The wall of the discharge pipe (3) has uniform holes to allow the melt filtered by the filter disc to flow into the discharge pipe (3).

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