Multi-layer air filter screen

Abstract

The utility model discloses a multilayer air filter screen which comprises a fixing ring, a supporting ring and a plurality of ring bodies, filter screens are installed in the ring bodies, the ring bodies are attached and arranged in the fixing ring, and a plurality of positioning blocks for pressing the ring bodies inwards are arranged on the inner ring face of the fixing ring in pairs. The supporting ring is installed outside the fixing ring. The filter screen fixing device is simple in structure, the fixing ring and the filter screen can be installed in any ventilation pipeline through the supporting ring, the use adaptability is improved, after the positioning block moves inwards, the filter screen can be directly taken out of the fixing ring, and the filter screen can be conveniently disassembled and assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, and particularly relates to a multi-layer air filter screen. Background Art

[0002] An air filter screen refers to a device that captures dust from a gas-solid two-phase flow through the action of a porous filter material and purifies the gas. Its function is to purify the air with a low dust content and send it into the room to ensure the process requirements of a clean room and the air cleanliness in a general air-conditioned room.

[0003] However, the current air filter screen has a simple structure and cannot be installed in any ventilation duct. It can only be installed after improving the duct, which affects the adaptability of the filter screen. Moreover, after the current filter screen is installed, it cannot be quickly disassembled, thus affecting the subsequent replacement efficiency. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a multi-layer air filter screen that can be installed in any ventilation duct and can be quickly disassembled and assembled to solve the problems mentioned in the above background art.

[0005] The utility model is realized by the following technical solutions: a multi-layer air filter screen includes a fixing ring, a support ring and a plurality of ring bodies. Filter screens are installed inside each of the ring bodies. The plurality of ring bodies are attached and arranged inside the fixing ring. On the inner circumferential surface of the fixing ring, a plurality of positioning blocks that press the ring bodies inward are arranged in pairs. The support ring is installed outside the fixing ring.

[0006] As a preferred technical solution, a plurality of fixing blocks are installed on one side surface of the support ring. Screw holes are provided on the fixing blocks, and bolts are threadedly connected in the screw holes. The plurality of fixing blocks are evenly distributed in an annular structure.

[0007] As a preferred technical solution, a plurality of grooves are arranged in pairs on the inner circumferential surface of the fixing ring. One ends of the positioning blocks are inserted into the grooves, and compression springs are installed. The other ends of the compression springs are installed on the inner wall surfaces of the grooves. The distance between each pair of positioning blocks matches the width after adding up the plurality of ring bodies. The inner side surfaces of the positioning blocks are in contact with the outer side surfaces of the ring bodies.

[0008] As a preferred technical solution, a plurality of positioning holes are provided on one side surface of the ring body, and positioning columns are provided on the other side surface of the ring body opposite to the positioning holes. The positioning columns on the ring body are inserted into the positioning holes of the adjacent ring body.

[0009] As a preferred technical solution, an annular groove is provided on the outer circumferential surface of the support ring, and a sealing ring is installed in the annular groove.

[0010] As a preferred technical solution, an external thread is provided on the outer circumferential surface of the fixed ring, and an internal thread is provided on the inner circumferential surface of the support ring. The support ring is engaged and connected to the external thread on the fixed ring through the internal thread.

[0011] As a preferred technical solution, the inner diameter of the fixed ring is set to be the same as the outer diameter of the ring body.

[0012] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple. Through the support ring, the fixed ring and the filter net can be installed in any ventilation duct, which increases the adaptability of use. And after the positioning block moves inward, the filter net can be directly taken out from the fixed ring, which facilitates its disassembly and assembly. Moreover, multiple filter nets can perform multiple filtrations to ensure the air quality. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the present utility model after removing the ring body;

[0016] Figure 3 It is a schematic diagram of the structure of the ring body in the present utility model.

[0017] Among them, 1. Ring body; 2. Filter net; 3. Fixed ring; 4. Support ring; 5. Sealing ring; 6. Fixed block; 7. Screw hole; 8. Bolt; 9. Positioning column; 10. Positioning block; 11. Positioning hole. Detailed Embodiment

[0018] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0019] All the features disclosed in this specification, or all the steps in any method or process disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0020] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless specifically recited, may be replaced by other equivalent or alternative features with similar purposes. That is, unless specifically recited, each feature is only an example of a series of equivalent or similar features.

[0021] As Figure 1 、 Figure 2 and Figure 3 shown, a multi-layer air filter of the present utility model includes a fixing ring 3, a support ring 4 and a plurality of ring bodies 1. A filter screen 2 is installed inside each of the ring bodies 1. The plurality of ring bodies 1 are attached and arranged inside the fixing ring 3. A plurality of positioning blocks 10 for pressing the ring bodies 1 inward are arranged in pairs on the inner circumferential surface of the fixing ring 3. The support ring 4 is installed outside the fixing ring 3.

[0022] In this embodiment, a plurality of fixing blocks 6 are installed on one side surface of the support ring 4. Screw holes 7 are provided on the fixing blocks 6, and bolts 8 are threadedly connected in the screw holes 7. The plurality of fixing blocks 6 are evenly distributed in an annular structure.

[0023] In this embodiment, a plurality of grooves are arranged in pairs on the inner circumferential surface of the fixing ring 3. One end of each positioning block 10 is inserted into the groove, and a compression spring is installed. The other end of the compression spring is installed on the inner wall surface of the groove. The distance between each pair of positioning blocks 10 matches the width after adding the plurality of ring bodies 1. The inner side surfaces of the positioning blocks 10 are in contact with the outer side surfaces of the ring bodies 1.

[0024] In this embodiment, a plurality of positioning holes 11 are provided on one side surface of the ring body 1. Positioning columns 9 are provided on the other side surface of the ring body opposite to the positioning holes 11. The positioning columns 9 on the ring body 1 are inserted into the positioning holes 11 of the adjacent ring body 1.

[0025] In this embodiment, an annular groove is provided on the outer circumferential surface of the support ring 4. A sealing ring 5 is installed in the annular groove. The sealing ring can increase the sealing performance between the support ring and the ventilation duct.

[0026] In this embodiment, an external thread is provided on the outer circumferential surface of the fixing ring 3, and an internal thread is provided on the inner circumferential surface of the support ring 4. The support ring 4 is meshed and connected with the external thread on the fixing ring 3 through the internal thread. The support ring can be quickly installed and disassembled by means of threaded connection, and the support ring can be designed according to the inner diameter of the ventilation duct.

[0027] In this embodiment, the inner diameter of the fixing ring 3 is set to be the same as the outer diameter of the ring body 1, so that after the ring body is installed, the outer circumferential surface of the ring body can be in contact with the inner circumferential surface of the fixing ring, increasing the sealing performance between the two.

[0028] When installed in a ventilation duct, first remove the support ring and select a support ring that matches the inner diameter of the ventilation duct. After the support ring is selected, thread it onto the fixing ring so that after it is inserted into the interior of the ventilation duct, the outer circumferential surface of the support ring can contact the inner circumferential surface of the ventilation duct, and the bolt can be rotated to move the bolt outward along the screw hole until one end of the bolt abuts against the inner wall surface of the ventilation duct to ensure the stability of the installation;

[0029] After multiple ring bodies are fitted together, the positioning posts on the ring bodies can be inserted into the positioning holes of adjacent ring bodies to position the ring bodies. Then, by squeezing the positioning block on one side, the ring body can enter the middle of the fixing ring. After the ring body completely enters and abuts against the positioning block on the other side, the previously squeezed positioning block can pop out outward through the compression spring and abut against the other side of the ring body to complete the axial positioning of the ring body and ensure the stability of the installation;

[0030] The filter screen can perform filtering operations on any channel pipeline, and multiple filter screens can perform multiple filtrations on the passing air to ensure the air quality.

[0031] As described above, only the specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are conceived without creative labor should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A multi-layer air filter, characterized in that: The invention comprises a fixed ring (3), a support ring (4) and a plurality of ring bodies (1), wherein a filter screen (2) is installed inside each of the ring bodies (1), the plurality of ring bodies (1) are attached to and arranged inside the fixed ring (3), a plurality of positioning blocks (10) for pressing the ring bodies (1) inward are arranged in groups of two on the inner ring surface of the fixed ring (3), and the support ring (4) is installed outside the fixed ring (3).

2. The multi-layer air filter according to claim 1, characterized in that: A plurality of fixing blocks (6) are installed on one side surface of the support ring (4), each fixing block (6) is provided with a screw hole (7), each screw hole (7) is threadedly connected with a bolt (8), and the plurality of fixing blocks (6) are evenly distributed in a ring structure.

3. The multi-layer air filter according to claim 1, characterized in that: A plurality of grooves are arranged in groups of two on the inner ring surface of the fixed ring (3), one end of each positioning block (10) is inserted into the groove and a compression spring is installed on each of the positioning blocks (10), and the other end of the compression spring is installed on the inner wall surface of the groove. The distance between each group of positioning blocks (10) matches the width of the multiple ring bodies (1) added together, and the inner side surfaces of the positioning blocks (10) are arranged to contact the outer side surfaces of the ring bodies (1).

4. The multi-layer air filter according to claim 1, characterized in that: A plurality of positioning holes (11) are provided on one side surface of the ring body (1), and positioning posts (9) are provided on the other side surface of the ring body (1) opposite to the positioning holes (11). The positioning posts (9) on the ring body (1) are inserted into the positioning holes (11) of the adjacent ring body (1).

5. The multi-layer air filter according to claim 1, characterized in that: An annular groove is provided on the outer ring surface of the support ring (4), and a sealing ring (5) is installed in the annular groove.

6. The multi-layer air filter according to claim 1, characterized in that: An external thread is arranged on the outer ring surface of the fixing ring (3), and an internal thread is arranged on the inner ring surface of the supporting ring (4). The supporting ring (4) is meshedly connected with the external thread on the fixing ring (3) via the internal thread.

7. The multi-layer air filter according to claim 1, characterized in that: The inner diameter of the fixing ring (3) is set to be the same as the outer diameter of the ring body (1).

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