A filter screen with variable pore size

Abstract

The utility model discloses a kind of folding filter screen with variable filter hole size, belong to sewage filtering technical field, including filter screen main part;Whole filter screen main part is provided with multiple front and rear extension and left and right linear array distribution crease line, whole filter screen main part can be folded along crease line;The crease line is divided into crease line one and crease line two, wherein crease line one and crease line two are alternately distributed and the height where crease line one is always lower than the height where crease line two, all the place where crease line one is formed by gradually inclined lowering of crease line two to crease line one Lower groove, all the multiple evenly distributed filter holes are linearly provided in lower groove along crease line one;After the whole filter screen main body is driven to stretch or fold, all filter holes are expanded or reduced synchronously at this time.By driving the stretching and folding of filter screen main body, the size of filter hole is adjusted synchronously, solving the problem that traditional fixed filter hole filter screen needs to be replaced frequently and has poor adaptability.

Description

Technical Field

[0001] This utility model relates to the field of wastewater filtration technology, specifically a folded filter screen with variable pore size. Background Technology

[0002] In wastewater filtration, filtration is a crucial step in removing suspended solids from water. Traditional filtration equipment often uses metal mesh or fiber filter cloth with fixed filter holes as the filter medium, which is prone to the following technical problems: Fixed filter holes: For different water qualities (such as those containing large or fine particles), fixed filter holes are difficult to match the best interception requirements. Either the filter holes are too large, causing impurities to pass through, or the filter holes are too small, causing blockage and affecting filtration efficiency. Replacement takes a long time: The machine needs to be stopped to replace the filter, which is time-consuming and labor-intensive, seriously affecting the continuity of processing and reducing the working efficiency of the equipment.

[0003] Therefore, there is an urgent need for a wastewater filtration device that can dynamically adjust the size of the filter holes, reduce the frequency of replacement, and has a compact structure. Utility Model Content

[0004] The first technical problem this invention aims to solve is to provide a folded filter screen with variable pore size. By driving the extension and folding of the filter screen body, the pore size can be adjusted synchronously, thus solving the problem of frequent replacement and poor adaptability of traditional fixed-pore filter screens.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A pleated filter screen with variable pore size, comprising a filter screen body; The core improvement is that the entire filter body has multiple crease lines extending forward and backward and arranged in a linear array on the left and right sides, allowing the entire filter body to fold along the crease lines. The crease lines are divided into crease line one and crease line two, with crease line one and crease line two alternating in distribution and the height of crease line one always being lower than the height of crease line two. At the location of all crease lines one, a depression is formed that gradually slopes down from crease line two to crease line one. Multiple evenly distributed filter holes are linearly opened along crease line one in all depressions. When the entire filter body is driven to extend or fold to the left or right, all filter holes expand or shrink synchronously.

[0006] By adopting the above solution, the entire filter body is a folded plastic sheet (such as PP material). During the molding process, crease lines need to be pressed in advance. The rigidity of the crease lines is reduced by local thinning, scoring, or material orientation design, making it a "flexible node" that can be bent repeatedly. This maintains a certain connection strength while allowing for flexible folding. When the entire filter body is driven to extend or fold left and right, all filter holes expand or shrink synchronously, thus adapting to the interception needs of different water qualities (such as enlarging the filter holes for large particles and shrinking them for fine particles), avoiding frequent filter replacements and making it more adaptable.

[0007] As a preferred embodiment of a pleated filter screen with variable pore size, the filter screen body includes a top filter screen body and a bottom filter screen body; the difference between the top filter screen body and the bottom filter screen body is that the pores of the top filter screen body are larger than those of the bottom filter screen body, thereby forming a double-layer filtration and improving the interception accuracy of impurities in sewage.

[0008] As a preferred embodiment of a pleated filter screen with variable pore size, a set of filter screen bodies is provided, and the set of filter screen bodies is inclined as a whole; a total of two sets of filter screen bodies are provided; the two sets of filter screen bodies are gradually inclined and lowered from the middle to both sides; by tilting the filter screen bodies, the intercepted impurities flow under the guidance of the lower groove, thereby reducing the accumulation of impurities on the upper surface of the filter screen bodies.

[0009] The second technical problem to be solved by this utility model is to provide a folded filter screen with variable pore size, which uses a pneumatic method to drive the extension and folding of the filter screen body to achieve synchronous adjustment of pore size.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: Based on the above solution, a pneumatic folding device is also included, which is installed at both ends of the filter body and drives the filter body to extend or fold left and right. The pneumatic folding device includes multiple suspension plates (such as PP material) connected to the fold lines at the front and rear ends of the filter body, suspension grooves opened on the suspension plates, and suspension rods that slide through all the suspension grooves; wherein the suspension rods are fixed in the filter chamber of the filter equipment. The pneumatic folding device also includes a corrugated air pipe fitted on the suspension rod and simultaneously fixing two adjacent suspension plates, two main air supply pipes (which are rigid air pipes) that are simultaneously connected to the air pump and respectively fixed to one side of the corrugated air pipe, and an auxiliary air supply pipe (which is flexible air pipe) that connects each corrugated air pipe to the main air supply pipe; wherein the main air supply pipe is connected to the air pump outside the filter chamber of the filter equipment.

[0011] By adopting the above scheme, when the air pump inflates or evacuates the corrugated air pipe, the suspension plate drives the entire filter body to extend or fold evenly. At this time, all filter holes expand or shrink synchronously, making the size change of all filter holes more uniform.

[0012] The beneficial effects of this utility model are: 1. Dynamically adjustable filter holes: The filter body is pneumatically driven to extend and retract, and all filter holes expand or shrink synchronously to adapt to the interception needs of different water qualities (such as enlarging the filter holes for large particles and shrinking them for fine particles), avoiding frequent filter replacements. 2. High filtration efficiency: The dual-layer filter body (top coarse filter + bottom fine filter) and dual / multi-stage filtration chamber design improve the filtration area and interception accuracy per unit volume, making it suitable for high-flow sewage scenarios; 3. Pneumatically driven uniform folding: It uses a pneumatic method to drive the filter body to extend or fold. When the air pump inflates or evacuates the corrugated air pipe, the entire filter body is driven to extend or fold evenly through the suspension plate. At this time, all filter holes expand or shrink synchronously, making the size change of all filter holes more uniform. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the pleated filter screen with variable pore size in Example 1; Figure 2 This is a three-dimensional structural diagram of the filter body; Figure 3 This is a top view of the filter body; Figure 4 for Figure 2 A magnified view of a section at point A in the middle; Figure 5 for Figure 1 A magnified view of a section at point B in the middle; Figure 6 This is a three-dimensional structural diagram of the pleated filter screen with variable pore size in Example 2; Reference numerals: 1-Filter body; 1a-Top filter body; 1b-Bottom filter body; 2-Fold line; 2a-Fold line one; 2b-Fold line two; 3-Lower groove; 4-Filter hole; 5-Pneumatic folding device; 51-Suspension plate; 52-Suspension groove; 53-Suspension rod; 54-Corrugated air pipe; 55-Main air pipe; 56-Auxiliary air pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1, as Figures 1 to 4 As shown, a folded filter screen with variable pore size is used in filtration equipment for filtering impurities in wastewater. It includes a filter screen body 1. The entire filter screen body 1 has multiple fold lines 2 extending forward and backward and linearly distributed left and right. The entire filter screen body 1 can be folded along the fold lines 2. The fold lines 2 are divided into fold line 1 2a and fold line 2b, where fold line 1 2a and fold line 2b are alternately distributed, and the height of fold line 1 2a is always lower than the height of fold line 2b. At all locations of fold line 1 2a, a depression 3 is formed that gradually slopes downward from fold line 2b to fold line 1 2a. Multiple uniformly distributed filter holes 4 are linearly opened along fold line 1 2a within all depressions 3. When the entire filter screen body 1 is driven to extend or fold left and right, all filter holes 4 simultaneously expand or shrink. The entire filter body 1 is made of folded plastic sheet (PP material). During the molding process, crease lines 2 need to be pressed in advance. The crease lines 2 are designed by local thinning, scoring or material orientation to reduce the rigidity of the area, making it a "flexible node" that can be bent repeatedly. It maintains a certain connection strength and can be folded flexibly. When the entire filter body 1 is driven to extend or fold left and right, all the filter holes 4 expand or shrink synchronously, so as to adapt to the interception needs of different water qualities (such as increasing the filter holes for large particles and decreasing them for fine particles), avoiding frequent filter replacement and making it more adaptable.

[0017] like Figure 4 As shown, the filter body 1 includes a top filter body 1a and a bottom filter body 1b; the difference between the top filter body 1a and the bottom filter body 1b is that the filter holes 4 of the top filter body 1a are larger than those of the bottom filter body 1b, thus forming a double-layer filtration and improving the interception accuracy of impurities in the sewage.

[0018] like Figure 1 As shown, a set of filter screen bodies 1 is provided, and the filter screen bodies 1 are set at an overall angle. By setting the filter screen bodies 1 at an angle, the intercepted impurities flow under the guidance of the lower groove 3, thereby reducing the accumulation of impurities on the upper surface of the filter screen bodies 1.

[0019] like Figure 1 , Figure 5 As shown, it also includes a pneumatic folding device 5 installed at both ends of the filter body 1 and driving the filter body 1 to extend or fold left and right; the pneumatic folding device 5 includes multiple suspension plates 51 (PP material) respectively connected to the fold lines 2b at both ends of the filter body 1, suspension grooves 52 opened on the suspension plates 51, and suspension rods 53 that slide through all the suspension grooves 52; wherein the suspension rods 53 are fixed in the filter chamber of the filter equipment; the pneumatic folding device 5 also includes a corrugated air pipe 54 fitted on the suspension rod 53 and simultaneously fixing two adjacent suspension plates 51, an air pump installed outside the equipment body, two main air supply pipes 55 (which are rigid air pipes) simultaneously connected to the air pump and respectively fixed to one side of the corrugated air pipes 54, and auxiliary air supply pipes 56 (which are flexible air pipes) that connect each corrugated air pipe 54 to the main air supply pipes 55 respectively. When the air pump fills or draws air into the corrugated air pipe 54, the entire filter body 1 is stretched or folded evenly by the suspension plate 51. At this time, all the filter holes 4 expand or shrink synchronously, making the size change of all the filter holes 4 more uniform.

[0020] The working principle of Example 1: When filtering large particulate impurities, the PLC controls the air pump to inflate the corrugated air pipe 54, and the suspension plate 51 drives the entire filter screen body 1 to extend evenly. At this time, all filter holes 4 expand synchronously, thus filtering large particulate impurities. When filtering small particulate impurities, the PLC controls the air pump to extract air from the corrugated air pipe 54, and the suspension plate 51 drives the entire filter screen body 1 to fold evenly. At this time, all filter holes 4 shrink synchronously. This avoids frequent filter screen replacements and has higher adaptability. Therefore, it adapts to the interception needs of different water qualities (such as enlarging the filter holes for large particulate impurities and reducing them for fine particles), avoiding frequent filter screen replacements and having higher adaptability.

[0021] Example 2, as Figure 6 As shown, the only difference between this embodiment and Embodiment 1 is that: the filter body 1 is provided with two sets; the two sets of filter bodies 1 are gradually tilted and lowered from the middle to both sides; by tilting the filter body 1, the intercepted impurities flow under the guidance of the lower groove 3, thereby reducing the accumulation of impurities on the upper surface of the filter body 1.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pleated filter screen with variable pore size, comprising a filter screen body; Its features are: The entire filter body has multiple crease lines extending front and back and arranged in a linear array on the left and right sides, allowing the entire filter body to be folded along the crease lines. The crease lines are divided into crease line one and crease line two, with crease line one and crease line two alternating in distribution and the height of crease line one always being lower than the height of crease line two. At the location of all crease lines one, a depression is formed that gradually slopes down from crease line two to crease line one. Multiple evenly distributed filter holes are linearly opened along crease line one in all depressions. When the entire filter body is driven to extend or fold to the left or right, all filter holes expand or shrink synchronously.

2. The pleated filter screen with variable pore size according to claim 1, characterized in that: The filter body includes a top filter body and a bottom filter body; the difference between the top filter body and the bottom filter body is that the filter holes of the top filter body are larger than those of the bottom filter body.

3. The pleated filter screen with variable pore size according to claim 1, characterized in that: The filter body is provided in a set, and the filter body is tilted as a whole.

4. The pleated filter screen with variable pore size according to claim 1, characterized in that: The filter body is provided in two sets; the two sets of filter bodies gradually slope downward from the middle to both sides.

5. The pleated filter screen with variable pore size according to claim 1, characterized in that: It also includes a pneumatic folding device installed at both ends of the filter body and driving the filter body to extend or fold left and right; The pneumatic folding device includes multiple suspension plates connected to the fold lines at the front and rear ends of the filter body, suspension grooves opened on the suspension plates, and suspension rods that slide through all the suspension grooves; wherein the suspension rods are fixed in the filter chamber of the filter equipment.

6. The pleated filter screen with variable pore size according to claim 5, characterized in that: The pneumatic folding device also includes a corrugated air pipe fitted on the suspension rod and simultaneously fixing two adjacent suspension plates, two main air supply pipes that are simultaneously connected to the air pump and respectively fixed to one side of the corrugated air pipe, and an auxiliary air supply pipe that connects each corrugated air pipe to the main air supply pipe; wherein the main air supply pipe is connected to the air pump outside the filter chamber of the filter equipment.

7. The pleated filter screen with variable pore size according to claim 6, characterized in that: The main gas supply pipe is a rigid gas pipe.

8. The pleated filter screen with variable pore size according to claim 6, characterized in that: The auxiliary air supply tube is a flexible air tube.

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