Colloid filtering disc type filter element for film production

Abstract

The utility model relates to the technical field of disc filter elements, in particular to a colloid filter disc type filter element for film production, which comprises a filter element inner column, and a plurality of steel meshes are arranged on the filter element inner column. A filter assembly used for preventing crystal points from being formed in the film product is arranged on the multiple steel meshes, the filter assembly comprises an outer filter screen and a metal fiber filter screen which are symmetrically arranged on the two sides of the steel meshes, and a metal powder layer is arranged between the outer filter screen and the metal fiber filter screen at the bottom ends of the steel meshes. According to the utility model, the filter assembly is arranged, so that when colloid in a melt material passes through the filter assembly consisting of the metal fiber filter screen, the outer filter screen, the steel mesh and the metal powder layer, the colloid can be primarily filtered and finely filtered by the outer filter screen and the metal fiber filter screen at the upper part, and when the colloid passes through the metal powder layer at the lower part, the colloid can be finely filtered; the irregular and sharp metal powder has a good cutting function, and large-size colloids in the melt can be cut into fine colloids.

Description

Technical Field

[0001] The utility model relates to the technical field of disc filter elements, in particular to a colloid filtering disc filter element for film production. Background Art

[0002] Disc filters are often used in the production of high-quality optical films and lithium battery diaphragms.

[0003] The filter material of most existing traditional disc filter elements is usually sintered metal fiber felt. This filter material has a very obvious filtering effect on solid impurities, but it is not very effective in filtering out colloidal impurities contained in PE, PP or PET melts. The main reason is that the colloid in the melt material is flexible and will deform under the action of a high pressure difference, thereby passing through the filter material to reach the downstream process and forming quality defects such as large crystal points in the film product.

[0004] Therefore, a colloid filtration disc filter element for film production is proposed. Utility Model Content

[0005] The utility model aims to provide a disc filter element for colloid filtration for film production, so as to solve the problem of quality defects such as large crystal points when the conventional disc filter element mentioned in the above background technology is used to filter out the colloidal impurities contained in PE, PP or PET melt.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a colloid filter disc filter element for thin film production, comprising an inner column of the filter element, on which a plurality of steel meshes are arranged; a plurality of the steel meshes are provided with a filter assembly for preventing crystal points from forming in the thin film product, the filter assembly comprising an outer filter mesh and a metal fiber filter mesh symmetrically arranged on both sides of the steel mesh, a metal powder layer is arranged between the outer filter mesh and the metal fiber filter mesh at the bottom of the steel mesh; and also comprising a connecting assembly arranged in the inner column of the filter element that can facilitate the disassembly and assembly of the filter assembly, the connecting assembly comprising an upper pressing piece and a lower pressing piece arranged on the inner column of the filter element, a plurality of clamping blocks for clamping with the upper pressing piece are arranged in the inner cavity of the inner column of the filter element, and a plurality of push blocks for pushing the clamping blocks to move are arranged on one side of the clamping blocks.

[0007] Preferably, a connecting ring is fixedly connected to the outer filter screen, and a groove is provided on the connecting ring, and a protrusion is fixedly connected to the metal fiber filter screen, and the protrusion is buckled in the groove.

[0008] Preferably, a thread groove is formed on the upper pressing piece, an external thread is formed on the lower pressing piece, and the lower pressing piece is threadedly connected in the thread groove, and the steel mesh, the external filter mesh and the metal fiber filter mesh are all slidably connected to the upper pressing piece.

[0009] Preferably, a circular arc groove is provided in the upper pressing piece, and a plurality of limiting rubber rings matching the circular arc groove are provided on the inner column of the filter element.

[0010] Preferably, a threaded rod is rotatably connected in the inner column of the filter element, and the threaded rod is threadedly connected to the push block, a connecting plate is fixedly connected between several of the push blocks, a limiting groove is provided in the inner column of the filter element, and the connecting plate is slidably connected in the limiting groove.

[0011] Preferably, the clamping block is provided with an inclined surface, and the pushing block is arranged in an inclined shape matching the inclined surface.

[0012] Preferably, a clamping groove adapted to the clamping block is provided in the upper pressing member, and a tension spring is fixedly connected between the clamping block and the inner column of the filter element.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model sets a filtering assembly so that when the colloid in the melt material passes through the filtering assembly composed of a metal fiber filter, an outer filter, a steel mesh and a metal powder layer, the outer filter and the metal fiber filter above can perform preliminary filtration and fine filtration on the colloid, and when it passes through the metal powder layer below, the irregular and sharper metal powder has a better cutting function, which can cut the larger sized colloid in the melt into fine colloid, thereby reducing the influence of larger crystals on the quality of the film product.

[0015] 2. The utility model provides a connecting assembly so that when the filter assembly is placed on the inner column of the filter element, the threaded rod is rotated to move the push block upward and the clamping block moves into the clamping groove of the upper pressure piece for clamping, thereby completing the fixation of the filter assembly on the inner column of the filter element. This makes it easy to install or disassemble the entire filter element assembly formed between the filter assembly and the inner column of the filter element, and then to remove and clean the filter assembly to prevent clogging. At the same time, the filter assembly is also a detachable structure, and when it is damaged, it is easy to remove the internal steel mesh for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of a colloid filter disc filter element for film production according to an embodiment of the utility model;

[0018] Figure 2This is a schematic diagram of the cross-sectional structure of a steel mesh of a colloid filter disc filter element for film production according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the inner column structure of a filter element of a colloid filtration disc filter element for film production according to an embodiment of the utility model;

[0020] Figure 4 This is a colloid filter disc filter element for film production according to the utility model embodiment Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 This is a schematic diagram of the connecting plate structure of a colloid filtering disc filter element for film production according to an embodiment of the utility model.

[0022] The markings in the figure are: 1. Inner column of filter element; 2. Steel mesh; 3. Outer filter mesh; 4. Metal fiber filter mesh; 5. Metal powder layer; 6. Upper pressure piece; 7. Lower pressure piece; 8. Block; 9. Push block; 10. Connecting ring; 11. Groove; 12. Bump; 13. Threaded groove; 14. Arc groove; 15. Limiting rubber ring; 16. Threaded rod; 17. Connecting plate; 18. Limiting groove; 19. Inclined surface; 20. Block; 21. Tension spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 5As shown, a specific embodiment of the utility model provides a colloid filter disc filter element for film production, including a filter element inner column 1, on which a plurality of steel meshes 2 are arranged; a filter assembly for preventing crystal points from forming in the film product is arranged on the plurality of steel meshes 2, and by arranging the filter assembly, the formation of crystal points in the film product can be prevented from causing defects, thereby enhancing the filtering effect and reducing quality defects, the filter assembly includes an outer filter mesh 3 and a metal fiber filter mesh 4 symmetrically arranged on both sides of the steel mesh 2, and a metal powder layer 5 is arranged between the outer filter mesh 3 and the metal fiber filter mesh 4 at the bottom of the steel mesh 2; it also includes a connecting assembly arranged in the filter element inner column 1 that can facilitate the disassembly and assembly of the filter assembly, and by arranging the connecting assembly, it is convenient to install or disassemble the filter assembly, thereby facilitating the cleaning of the filter assembly and preventing it from being blocked after long-term use, the connecting assembly includes an upper pressing piece 6 and a lower pressing piece 7 arranged on the filter element inner column 1, and a plurality of clamping blocks 8 for clamping with the upper pressing piece 6 are arranged in the inner cavity of the filter element inner column 1, and a plurality of push blocks 9 for pushing the clamping blocks 8 to move are arranged on one side of the clamping blocks 8.

[0026] like Figures 1 to 5 As shown, specifically, when the entire filter element is in use, it is installed and assembled, the outer filter screen 3 is fixedly connected with a connecting ring 10, and the connecting ring 10 is provided with a groove 11, the metal fiber filter screen 4 is fixedly connected with a protrusion 12, and the protrusion 12 is buckled in the groove 11, the steel mesh 2, the outer filter screen 3 and the metal fiber filter screen 4 are all sleeved and placed on the upper pressure piece 6, stacked layer by layer, so that the protrusion 12 on the metal fiber filter screen 4 is buckled into the groove 11, so that the metal fiber filter screen 4 and the outer filter screen 3 are connected together, and the connection effect between the two is strengthened, the upper pressure piece 6 is provided with a threaded groove 13, the lower pressure piece 7 is provided with an external thread, and the lower pressure piece 7 is threadedly connected to the threaded groove 13, the steel mesh 2, the outer filter screen 3 and the metal fiber filter screen 4 are all slidably connected to the upper pressure piece 6. After the steel mesh 2, the outer filter screen 3 and the metal fiber filter screen 4 are sleeved on the upper pressure piece 6, the lower pressure piece 7 is connected with the upper pressure piece 6 through the cooperation between the thread groove 13 and the external thread, so that the steel mesh 2, the outer filter screen 3 and the metal fiber filter screen 4 are connected and fixed through the connection and cooperation between the lower pressure piece 7 and the upper pressure piece 6. Conversely, the lower pressure piece 7 is rotated so that it can be separated from the upper pressure piece 6, so that the components can be removed. The filter element formed by the combination of the steel mesh 2, the two outer filter screens 3 and the two metal fiber filter screens 4 in the above process can perform filtering.

[0027] like Figures 1 to 5As shown, specifically, in order to enhance the filtering effect, the combined filter elements can be stacked, and several filter elements are gradually slid and placed on the filter element inner column 1. A circular arc groove 14 is opened in the upper pressure piece 6, and a plurality of limiting rubber rings 15 adapted to the circular arc groove 14 are provided on the filter element inner column 1. The filter element slidably placed on the filter element inner column 1 makes its circular arc groove 14 cooperate with the limiting rubber ring 15 on the filter element inner column 1, thereby gradually determining the position of the filter element on the filter element inner column 1, and through the circular arc groove The upper pressing piece 6 is preliminarily fixed on the inner column 1 of the filter element by the buckling action between 14 and the inner column 1 of the filter element, that is, the filter element is fixed on the inner column 1 of the filter element. A threaded rod 16 is rotatably connected in the inner column 1 of the filter element, and the threaded rod 16 is threadedly connected to the push block 9. A connecting plate 17 is fixedly connected between the push blocks 9. A limiting groove 18 is provided in the inner column 1 of the filter element, and the connecting plate 17 is slidably connected in the limiting groove 18. A slope 19 is provided on the block 8, and the push block 9 is in a state of being parallel to the slope 19. The upper pressing member 6 is provided with a card slot 20 adapted to the card block 8, and a tension spring 21 is fixedly connected between the card block 8 and the inner column 1 of the filter element. The threaded rod 16 is rotated so that the connecting plate 17 moves upward in the limit groove 18, so that the push block 9 gradually moves upward and gradually contacts the card block 8 at the top. Since the card block 8 is provided with an inclined surface 19, and the push block 9 is provided with an inclined surface adapted to the inclined surface 19, the card block 8 is gradually pushed under the action of the push block 9. The inner column 1 of the filter element is moved out and inserted into the card slot 20 for card connection. The tension spring 21 is stretched under the force to generate a reaction force, thereby completing the connection and fixation between the upper pressure piece 6 and the inner column 1 of the filter element, that is, the filter element is fixed on the inner column 1 of the filter element, and the threaded rod 16 is rotated in the reverse direction to move the push block 9 downward, so that the push block 9 is disengaged from the card block 8, so that the card block 8 is moved out of the card slot 20 under the reaction force of the tension spring 21. At this time, the filter element can be removed from the inner column 1 of the filter element for replacement or maintenance.

[0028] like Figure 1 and Figure 2As shown, specifically, the filter element is located on the inner column 1 of the filter element to form a laminated filter element, which can enhance the filtering effect through multiple laminated filter elements, and the metal powder layer 5 provided between the outer filter screen 3 at the bottom of the steel mesh 2 and the metal fiber filter screen 4 further enhances the filtering effect. The metal powder in the metal powder layer 5 is irregular in shape, the particle edges are relatively sharp, and it is compounded with the metal fiber filter screen 4, so that the colloid in the melt material can be cut into small colloids when passing through, thereby reducing the impact on the quality of the film product, that is, although the colloid in the melt material is flexible, it will occur under the action of a higher pressure difference. Deformed, so as to pass through the filter material, but cut in the process of passing through, so as to avoid the formation of large crystal points and other quality defects in the film product, and its outer filter 3 is used for preliminary filtration and interception of larger impurities, and preliminary filtration is performed. After the preliminary filtration, it is finely filtered through the metal fiber filter 4 at the upper end and then reaches the steel mesh 2. The steel mesh 2 is used to guide the filtered fluid. The fluid contacts the bottom or top of the middle layer and is evenly guided through the steel mesh 2. The filtered fluid is guided out by the through holes in the inner cavity wall of the steel mesh 2. The fluid immediately reaches the metal fiber filter 4 at the bottom and passes through the metal powder layer 5 in the above process, and finally flows out through the outer filter 3 at the bottom.

[0029] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0030] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A colloidal filter disc filter element for film production, comprising a filter element inner column (1), characterized in that: A plurality of steel meshes (2) are provided on the inner column (1) of the filter element; A filter assembly for preventing crystal points from forming in the film product is provided on the plurality of steel meshes (2), the filter assembly comprising an outer filter mesh (3) and a metal fiber filter mesh (4) symmetrically arranged on both sides of the steel mesh (2), and a metal powder layer (5) is provided between the outer filter mesh (3) and the metal fiber filter mesh (4) at the bottom end of the steel mesh (2); It also includes a connecting assembly arranged in the filter element inner column (1) and capable of facilitating the disassembly and assembly of the filter assembly, the connecting assembly including an upper pressing piece (6) and a lower pressing piece (7) arranged on the filter element inner column (1), a plurality of clamping blocks (8) for clamping with the upper pressing piece (6) being arranged in the inner cavity of the filter element inner column (1), and a plurality of pushing blocks (9) for pushing the clamping blocks (8) to move being arranged on one side of the clamping blocks (8).

2. The colloid filter disc filter element for film production according to claim 1, characterized in that: A connecting ring (10) is fixedly connected to the outer filter screen (3), and a groove (11) is provided on the connecting ring (10); a protrusion (12) is fixedly connected to the metal fiber filter screen (4), and the protrusion (12) is buckled in the groove (11).

3. The colloid filter disc filter element for film production according to claim 1, characterized in that: The upper pressing piece (6) is provided with a thread groove (13), the lower pressing piece (7) is provided with an external thread, and the lower pressing piece (7) is threadedly connected in the thread groove (13), and the steel mesh (2), the outer filter mesh (3) and the metal fiber filter mesh (4) are all slidably connected to the upper pressing piece (6).

4. The colloid filter disc filter element for film production according to claim 1, characterized in that: The upper pressing piece (6) is provided with an arc groove (14), and the filter element inner column (1) is provided with a plurality of limit rubber rings (15) that match the arc groove (14).

5. The colloid filtration disc filter element for film production according to claim 1, characterized in that: A threaded rod (16) is rotatably connected in the filter element inner column (1), and the threaded rod (16) is threadably connected to a push block (9), a connecting plate (17) is fixedly connected between a plurality of the push blocks (9), a limiting groove (18) is provided in the filter element inner column (1), and the connecting plate (17) is slidably connected in the limiting groove (18).

6. The colloid filter disc filter element for film production according to claim 1, characterized in that: The clamping block (8) is provided with an inclined surface (19), and the pushing block (9) is arranged in an inclined shape matching the inclined surface (19).

7. The colloid filtration disc filter element for film production according to claim 1, characterized in that: The upper pressing piece (6) is provided with a clamping groove (20) adapted to the clamping block (8), and a tension spring (21) is fixedly connected between the clamping block (8) and the filter element inner column (1).

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