Stretchable oil-proof and dust-proof filter bag

Abstract

The utility model relates to a kind of stretchable oil-proof dust-removing filter bag, belong to dust-removing filter bag technical field, including installation shell and the dust-removing filter bag main part of sliding connection in installation shell inside and extending to its bottom, oil-proof structure that can be carried out oil-proof treatment is provided on the dust-removing filter bag main part, the oil-proof structure includes the base cloth layer being set in the dust-removing filter bag main part inside, the outer portion of the base cloth layer is provided with intermediate filter layer, the side away from the base cloth layer of the intermediate filter layer is provided with surface protective layer. The stretchable oil-proof dust-removing filter bag, by setting base cloth layer, the whole dust-removing filter bag main part can be supported, while improving the mechanical strength of dust-removing filter bag main part, by setting intermediate filter layer, dust in gas can be filtered, while by setting surface protective layer, the surface of dust-removing filter bag main part can be oil-stain-proof, avoid oil stain to cause the blockage of dust-removing filter bag main part, improve the dust-removing efficiency of dust-removing filter bag main part.

Description

Technical Field

[0001] This utility model relates to the field of dust removal filter bag technology, specifically a stretchable oil-proof dust removal filter bag. Background Technology

[0002] As a core component of baghouse dust collectors, the performance of dust collector filter bags directly affects the effectiveness of industrial dust control and the system's operating costs. Dust collector filter bags are a highly efficient dust collection medium, made from raw materials such as polyester staple fiber, PPS fiber, PP polypropylene, aramid fiber, and nylon fiber. They typically have a service life of 2-4 years, good air permeability, high dust collection rate, and are easy to clean, achieving a dust removal efficiency of up to 98.99% and effectively removing PM2.5.

[0003] Chinese utility model patent CN220370635U discloses a dust collector filter bag with a stretching structure, relating to the technical field of auxiliary devices for dust collection and filtration. The bag includes a stretching upper ring block placement groove, positioned above a dust collection limiting ring block, with a stretching upper ring block inside the groove. The stretching upper ring block and the dust collection limiting ring block are fixedly connected by a stretching soft cover. An anti-bending inner ring block is located at the center of the stretching upper ring block, and is fixedly connected to the stretching upper ring block by a slot. Limiting inner blocks are located on both sides below the stretching upper ring block and are fixedly connected to the dust collection limiting ring block. A dust collection filter lower bag is located below the dust collection limiting ring block. This dust collector filter bag with a stretching structure, through the design of the stretching soft cover, makes it easier to fix the stretching upper ring block. The combined design of the stretching upper ring block and the stretching soft cover makes it easier to stretch the dust collector filter bag during use.

[0004] However, this utility model does not have a corresponding oil-proof structure during use. In working conditions containing oil mist, oil fumes, or oily dust, oil mist or oily dust particles will be adsorbed on the surface of the filter bag fibers, forming a sticky film that blocks the pores of the filter material, thereby affecting the dust removal effect of the dust collector filter bag and failing to meet production needs. Therefore, a stretchable oil-proof dust collector filter bag is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a stretchable oil-proof dust collector filter bag, which has the advantage of being oil-proof. This solves the problem that existing dust collector filter bags do not have corresponding oil-proof structures, and in working conditions containing oil mist, oil fumes, or oily dust, oil mist or oily dust particles will be adsorbed on the surface of the filter bag fibers, forming a sticky film that blocks the pores of the filter material, thereby affecting the dust removal effect of the dust collector filter bag.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stretchable oil-proof dust removal filter bag, comprising an installation shell and a dust removal filter bag body slidably connected inside the installation shell and extending to its bottom, wherein the dust removal filter bag body is provided with an oil-proof structure capable of being treated to prevent oil.

[0007] The oil-proof structure includes a base fabric layer disposed inside the dust collector filter bag body, an intermediate filter layer disposed outside the base fabric layer, and a surface protection layer disposed on the side of the intermediate filter layer away from the base fabric layer. The surface protection layer consists of an oil-proof treatment layer and a coating layer.

[0008] Furthermore, the oil-resistant treatment layer is located on the outermost layer of the surface protective layer, and an anti-collapse ring is fixedly connected inside the base fabric layer.

[0009] Furthermore, the number of anti-collapse rings is three, and the three anti-collapse rings are evenly distributed inside the base fabric layer, and the diameter of the anti-collapse rings is 3 mm.

[0010] Furthermore, the thickness of the coating layer is 30 micrometers, the thickness of the intermediate filter layer is 0.5 millimeters, and the thickness of the base fabric layer is 0.6 millimeters.

[0011] Furthermore, an elastic ring is fixedly connected to one side of the dust filter bag body located inside the mounting shell, and a return spring is fixedly connected between the elastic ring and the inner bottom wall of the mounting shell.

[0012] Furthermore, positioning blocks extending into the interior of the mounting housing are fixedly connected to both sides of the elastic ring, and positioning grooves adapted to the positioning blocks are provided on the inner wall of the mounting housing.

[0013] Compared with the prior art, the present invention provides a stretchable oil-proof dust removal filter bag, which has the following beneficial effects:

[0014] This stretchable, oil-resistant dust collector filter bag features a base fabric layer that provides support and enhances the bag's mechanical strength. An intermediate filtration layer filters dust from the gas, while a surface protective layer protects the filter bag from oil contamination, preventing clogging and improving dust collection efficiency. This solution addresses the problem of existing dust collector filters lacking an oil-resistant structure, where oil mist, fumes, or oily dust particles adhere to the filter fiber surface, forming a sticky film that clogs the filter material pores and hinders dust collection. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the oil-proof structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the surface protective layer of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the reset spring of this utility model.

[0019] In the diagram: 1. Mounting shell; 2. Dust collector filter bag body; 21. Base fabric layer; 22. Intermediate filter layer; 23. Surface protective layer; 231. Oil-proof treatment layer; 232. Coating layer; 3. Anti-collapse ring; 4. Elastic ring; 5. Return spring. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 3 This embodiment of a stretchable oil-proof dust collector filter bag includes a mounting shell 1 and a dust collector filter bag body 2 that is slidably connected to the inside of the mounting shell 1 and extends to its bottom. The dust collector filter bag body 2 is provided with an oil-proof structure that can be oil-proofed. The oil-proof structure includes a base fabric layer 21 disposed inside the dust collector filter bag body 2, an intermediate filter layer 22 disposed outside the base fabric layer 21, and a surface protective layer 23 disposed on the side of the intermediate filter layer 22 away from the base fabric layer 21. The surface protective layer 23 is composed of an oil-proof treatment layer 231 and a coating layer 232.

[0022] Specifically, the oil-resistant treatment layer 231 is located on the outermost layer of the surface protective layer 23, and anti-collapse rings 3 are fixedly connected inside the base fabric layer 21. There are three anti-collapse rings 3, which are evenly distributed inside the base fabric layer 21. The diameter of the anti-collapse rings 3 is 3 mm.

[0023] It should be noted that the thickness of the coating layer 232 is 30 micrometers, the thickness of the intermediate filter layer 22 is 0.5 millimeters, and the thickness of the base fabric layer 21 is 0.6 millimeters.

[0024] It should be noted that the membrane layer 232 is made of expanded polytetrafluoroethylene (ePTFE) film, which is hot-pressed onto the surface of the filter media. Its ultra-thin design ensures low airflow resistance, while the microporous structure (pore size 0.1-3μm) enables surface filtration, preventing oil mist penetration and improving dust removal efficiency. The oil-resistant treatment layer 231 is formed by impregnating fluorocarbon resin or PTFE emulsion into the fiber surface through an impregnation process, creating a molecular-level oil-resistant coating. This layer does not significantly increase the overall thickness, but it reduces the fiber surface energy to 10-15 dynes / cm². 2 This achieves the "lotus effect".

[0025] It should be noted that the intermediate filter layer 22 is typically a gradient needle-punched felt structure, consisting of layers of fine denier fibers (surface layer) to coarse fibers (bottom layer). The fine fiber layer captures fine dust, while the coarse fiber layer provides dust holding space and support. The base fabric layer 21 is mostly made of polyester, PPS, or fiberglass woven fabric, providing tensile strength and dimensional stability. The fiberglass base fabric needs to be coated with a PTFE coating for corrosion protection. The anti-collapse ring 3 is made of stainless steel to prevent the dust collector filter bag body 2 from being sucked down or twisted during negative pressure or dust removal, ensuring unobstructed airflow and effective dust removal.

[0026] Please see Figure 1 and Figure 4 In this embodiment, an elastic ring 4 is fixedly connected to one side of the dust filter bag body 2 inside the mounting shell 1, and a return spring 5 is fixedly connected between the elastic ring 4 and the inner bottom wall of the mounting shell 1.

[0027] Specifically, positioning blocks extending into the interior of the mounting shell 1 are fixedly connected to both sides of the elastic ring 4, and positioning grooves that are adapted to the positioning blocks are provided on the inner wall of the mounting shell 1.

[0028] It should be noted that the elastic ring 4 is made of corrugated metal elastic material, and the elastic ring 4 and the return spring 5 form a double-layer shock absorption structure: the vibration generated during equipment operation (such as fan start-up and pulse cleaning) will be absorbed by the elastic ring 4 first, and the remaining vibration will be further attenuated by the return spring. Traditional rigid-installed filter bags are directly subjected to vibration, resulting in frequent friction between the fibers and the shell and a shortened lifespan; while this design can reduce the frictional contact force between the filter bag and the shell, thereby improving the service life of the dust collector filter bag body 2.

[0029] The working principle of the above embodiments is as follows:

[0030] First, the staff installs the dust collector filter bag body 2 together with the mounting shell 1 into the dust collector. Then, when the dust-containing gas enters the dust collector, the dust in the gas can be filtered by the intermediate filter layer 22. At the same time, the surface protective layer 23 can prevent oil stains from the surface of the dust collector filter bag body 2, thus preventing oil stains from clogging the dust collector filter bag body 2 and improving the dust removal efficiency of the dust collector filter bag body 2. After a certain period of use, the dust collector filter bag body 2 can be cleaned and replaced.

[0031] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0032] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stretchable oil-proof dust collector filter bag, comprising a mounting shell (1) and a dust collector filter bag body (2) slidably connected inside the mounting shell (1) and extending to its bottom, characterized in that: The dust collector filter bag body (2) is provided with an oil-proof structure that can be used to prevent oil from entering it; The oil-proof structure includes a base fabric layer (21) disposed inside the dust filter bag body (2), an intermediate filter layer (22) disposed outside the base fabric layer (21), and a surface protection layer (23) disposed on the side of the intermediate filter layer (22) away from the base fabric layer (21). The surface protection layer (23) is composed of an oil-proof treatment layer (231) and a coating layer (232).

2. The stretchable oil-proof dust removal filter bag according to claim 1, characterized in that: The oil-resistant treatment layer (231) is located on the outermost layer of the surface protection layer (23), and an anti-collapse ring (3) is fixedly connected inside the base fabric layer (21).

3. The stretchable oil-proof dust removal filter bag according to claim 2, characterized in that: The number of anti-collapse rings (3) is three, and the three anti-collapse rings (3) are evenly distributed inside the base fabric layer (21). The diameter of the anti-collapse rings (3) is 3 mm.

4. The stretchable oil-proof dust removal filter bag according to claim 1, characterized in that: The thickness of the coating layer (232) is 30 micrometers, the thickness of the intermediate filter layer (22) is 0.5 millimeters, and the thickness of the base fabric layer (21) is 0.6 millimeters.

5. The stretchable oil-proof dust removal filter bag according to claim 1, characterized in that: The dust filter bag body (2) is fixedly connected to an elastic ring (4) on one side inside the mounting shell (1), and a return spring (5) is fixedly connected between the elastic ring (4) and the inner bottom wall of the mounting shell (1).

6. The stretchable oil-proof dust removal filter bag according to claim 5, characterized in that: The elastic ring (4) has positioning blocks that extend into the interior of the mounting shell (1) fixedly connected to both the left and right sides. The inner wall of the mounting shell (1) is provided with positioning grooves that are compatible with the positioning blocks.

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