Composite needle punched filter material

Abstract

The utility model belongs to filter material field, concretely relates to a kind of composite needle punching filter material, including net rack, the upper and lower portion of the net rack is equipped with ring, the inner layer of the net rack is covered with base cloth, and outer layer is covered with inner filter cloth;The end face of the outer side of the inner filter cloth is provided with first filter layer, radial fold is provided on the first filter layer, the end face of the outer side of the first filter layer is provided with second filter layer;Each filter layer is the wave structure of fold, fold part can be telescopic, soft and convenient bending, fold area is channel-like, act as buffer area in needle punching process, needle punching fiber is stuck into fold, prevent too tight between each filter layer, to avoid leak point generation, and different orientation fold channel can increase filtration area, make to be filtered object sufficient filtration, blocked filter object is captured in fold channel, collect in bottom under the action of gravity, prevent filter object direct accumulation in each filter layer surface layer and cause blockage, to improve filtration performance.

Description

Technical Field

[0001] This utility model relates to the field of filter media, specifically to a composite needle-punched filter media. Background Technology

[0002] Polyester needle-punched filter felt is an industrial filter material mainly used in dust control, liquid filtration, and air purification in metallurgy, chemical industry, building materials, machinery, petroleum, and pharmaceutical fields. It is made from polyester fibers, with the base fabric and filter media layer composited through a needle-punching process. The surface is hot-rolled or singed to improve smoothness, and some products have an additional PTFE coating for water and oil repellency.

[0003] Existing composite needled filter media are made by needled process of each filter layer. After needled, the filter layer becomes too hard and inconvenient to bend. Moreover, the taut filter layer is prone to leakage points after repeated needled, which causes some filter layers to fail to filter dust properly, which is a shortcoming. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a composite needle-punched filter material, which features a pleated structure design that facilitates bending and eliminates leakage points after needle punching.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a composite needle-punched filter material, including a mesh frame, with rings installed on the upper and lower parts of the mesh frame, the inner layer of the mesh frame being covered with a base fabric, and the outer layer being covered with an inner filter cloth;

[0008] The inner filter cloth has a first filter layer on its outer end face, and the first filter layer has radial pleats. The second filter layer has axial pleats on its outer end face.

[0009] An outer filter cloth is formed on the outer side of the second filter layer.

[0010] Preferably, the mesh frame is bonded between the base fabric and the inner filter fabric, and the upper and lower parts of the base fabric and the inner filter fabric are connected to the ring hoop.

[0011] Preferably, the upper part of the inner filter cloth is connected to a raised frame, and the upper and lower parts of the first filter layer, the second filter layer, and the outer filter cloth are connected to the frame.

[0012] Preferably, both the first filter layer and the second filter layer have a pleated "wave" structure, and the pleated areas are groove-shaped.

[0013] Preferably, the inner filter cloth, the first filter layer, and the second filter layer are composite molded together, and the fibers of the first filter layer and the second filter layer are inserted into the inner layer of the inner filter cloth.

[0014] Preferably, the outer filter cloth has filter holes and is coated with an antistatic coating.

[0015] The above-mentioned technical solution of this utility model has the following beneficial technical effects: each filter layer is a pleated wave structure, the pleated part can be stretched and stretched, soft and easy to bend, the pleated area is groove-shaped, which acts as a buffer area in the needle punching process. The needle punching fiber is inserted into the pleats to prevent the filter layers from being too tight, thereby avoiding the generation of leakage points. Moreover, the pleated grooves with different orientations can increase the filtration area, so that the filterable material can be fully filtered. The blocked filterable material is captured in the pleated groove and collected at the bottom under the action of gravity, preventing the filterable material from directly accumulating on the surface of each filter layer and causing blockage, thereby improving the filtration performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the planar structure of this utility model.

[0019] Figure label:

[0020] 1. Frame; 2. Hoop; 3. Base fabric; 4. Filter cloth; 5. Frame; 6. First filter layer; 7. Second filter layer; 8. Outer filter cloth. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0022] like Figure 1-3 As shown, the present invention proposes a composite needle-punched filter material, including a mesh frame 1, with rings 2 installed on the upper and lower parts of the mesh frame 1, the inner layer of the mesh frame 1 being covered with a base fabric 3, and the outer layer being covered with an inner filter cloth 4.

[0023] The inner filter cloth 4 has a first filter layer 6 on its outer end face, and radial pleats on the first filter layer 6. The second filter layer 7 has an axial pleat on its outer end face.

[0024] The outer side of the second filter layer 7 is formed with an outer filter cloth 8.

[0025] It should be noted that: the mesh frame 1 is bonded between the base fabric 3 and the inner filter fabric 4, and the upper and lower parts of the base fabric 3 and the inner filter fabric 4 are connected to the ring 2; firstly, the mesh frame 1 supports the base fabric 3 and the inner filter fabric 4, so that the two have a supporting skeleton, and the ring 2 is used to fix the ends of the base fabric 3 and the inner filter fabric 4, so as to shape and support the two, and combine the base fabric 3 and the inner filter fabric 4 into a whole.

[0026] In this embodiment, both the first filter layer 6 and the second filter layer 7 have a pleated "wave" structure. The pleated parts can stretch slightly, are soft and easy to bend. The pleated areas are groove-shaped and act as buffer areas in the needle punching process. The needle-punched fibers are inserted into the pleats to prevent the filter layers from being too tight, thereby avoiding leakage points. The pleated grooves with different orientations can increase the filtration area, allowing the filterable material to be fully filtered. The blocked filterable material is captured in the pleated grooves and collected at the bottom under the action of gravity, preventing the filterable material from accumulating directly on the surface of each filter layer and causing blockage, thereby improving the filtration performance.

[0027] It is understandable that the upper part of the inner filter cloth 4 is connected to the raised frame 5, and the upper and lower parts of the first filter layer 6, the second filter layer 7 and the outer filter cloth 8 are connected to the frame 5; the frame 5 is used to shape the ends of the first filter layer 6, the second filter layer 7 and the outer filter cloth 8, so that the first filter layer 6 and the second filter layer 7 can maintain the pleated shape during the composite molding process.

[0028] As an example of composite molding of filter media: the inner filter cloth 4, the first filter media layer 6, and the second filter media layer 7 are composite molded together, and the fibers of the first filter media layer 6 and the second filter media layer 7 are inserted into the inner layer of the inner filter cloth 4.

[0029] In this process, the first filter layer 6 and the second filter layer 7 are sequentially laid on the outer layer of the inner filter cloth 4. The first filter layer 6 and the second filter layer 7 are pleated. By piercing the first filter layer 6 and the second filter layer 7 with a needle, the limiting channels intertwine and interweave with each other during the up and down movement, tightly bonding the first filter layer 6 and the second filter layer 7 with the inner filter cloth 4 into one unit. The needle-punched composite can maintain the loose structure and filtration pores of the crude oil filter media, without affecting the filtration performance.

[0030] To further enhance the antistatic performance of the filter media, the outer filter cloth 8 is provided with filter holes to allow for normal transmission of the material to be filtered. Its surface is coated with an antistatic coating to prevent static electricity from adsorbing dust on the surface of the filter cloth and causing blockage of the filter channel. In addition, the mesh frame 1 is a conductive structure that can conduct static electricity internally, thereby achieving a combined internal and external antistatic function.

[0031] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A composite needle-punched filter material, characterized in that, Includes a mesh frame (1), with rings (2) installed on the upper and lower parts of the mesh frame (1), the inner layer of the mesh frame (1) is covered with a base fabric (3), and the outer layer is covered with an inner filter cloth (4); The inner filter cloth (4) has a first filter layer (6) on its outer end face, the first filter layer (6) has radial pleats, the first filter layer (6) has a second filter layer (7) on its outer end face, and the second filter layer (7) has axial pleats. The outer side of the second filter layer (7) is formed with an outer filter cloth (8).

2. The composite needle-punched filter material according to claim 1, characterized in that, The mesh frame (1) is bonded between the base fabric (3) and the inner filter cloth (4), and the upper and lower parts of the base fabric (3) and the inner filter cloth (4) are connected to the ring hoop (2).

3. The composite needle-punched filter material according to claim 1, characterized in that, The upper part of the inner filter cloth (4) is connected to a protruding frame (5), and the upper and lower parts of the first filter layer (6), the second filter layer (7) and the outer filter cloth (8) are connected to the frame (5).

4. The composite needle-punched filter material according to claim 1, characterized in that, Both the first filter layer (6) and the second filter layer (7) have a pleated "wave" structure, and the pleated areas are groove-shaped.

5. The composite needle-punched filter material according to claim 1, characterized in that, The inner filter cloth (4), the first filter layer (6) and the second filter layer (7) are compositely formed, and the fibers of the first filter layer (6) and the second filter layer (7) are inserted into the inner layer of the inner filter cloth (4).

6. The composite needle-punched filter material according to claim 1, characterized in that, The outer filter cloth (8) has filter holes and is coated with an antistatic coating.

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