Convex spherical smoke filtering layer

Abstract

The utility model provides a convex ball type smoke filtering layer, which comprises a shell and a filter element, the shell is of a spherical crown-shaped structure, the filter element comprises a wave-shaped folded filter membrane, the folded filter membrane is of an arc-shaped annular structure, and elastic sealants are arranged on the inner ring of the folded filter membrane and between the folded filter membrane and the shell. The smoke filtering layer is in a convex spherical shape and is used in the canister, the canister is used in cooperation with the mask, and toxic and harmful aerosol, bacterial viruses and the like can be effectively filtered out.

Description

Technical Field

[0001] The utility model relates to the field of protection technology, in particular to a convex ball-shaped smoke filter layer. Background Art

[0002] At present, most of the smoke filter layers of gas canisters are flat cylindrical, and the surface of the smoke filter layer has no curvature. With the development and continuous improvement of this product, it is necessary to increase the compactness of the gas canister and the mask, reduce the suspension torque, and improve the appearance. A small number of smoke filter layers have curvatures, but they are all smoke filter layers with surface coatings such as PTFE or polypropylene that can be heat-folded and formed. Not only are they not suitable for smoke filter layers made of glass fiber filter paper, but they are also prone to uneven fold spacing, thereby increasing the resistance of the gas canister. In the field of military chemical defense products, oil and salt aerosols need to be protected. PTFE or polypropylene materials have good protection effects on salt aerosols, but have very poor protection effects on oil aerosols. Therefore, in the field of military chemical defense, it is necessary to produce a convex spherical smoke filter layer of filter material folded and formed with a connecting glue, such as glass fiber filter paper.

[0003] During the manufacturing process of the smoke filter layer, especially after the filter materials are bonded end to end and the filter materials are reduced to a size that can fit into the shell and then placed into the shell, the filter materials are prone to warping and changing shape, making it difficult to fit into the shell. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a convex spherical smoke filter layer, which has a convex spherical shape and is used in a gas filter canister. The gas filter canister is used in conjunction with a mask to effectively filter toxic and harmful aerosols, bacteria, viruses, etc.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a convex spherical smoke filter layer, including a shell and a filter element, the shell is a spherical crown structure, the filter element includes a wavy pleated filter membrane, the pleated filter membrane is an arc-shaped ring structure, and an elastic sealant is provided on the inner ring of the pleated filter membrane and between the pleated filter membrane and the shell.

[0006] In a preferred solution, a support seat is provided at the center of the shell to support the middle part of the filter element, and an annular support surface is provided around the shell to support the pleated filter membrane.

[0007] In a preferred embodiment, a connecting glue is provided on the front and / or back of the pleated filter membrane, and the connecting glue is evenly distributed and connected between each fold of the pleated filter membrane.

[0008] In a preferred embodiment, the angle between the curved surface of the pleated filter membrane and the horizontal direction is 0° to 15°.

[0009] In a preferred embodiment, the pleated filter membrane is made of one of glass fiber material, PTFE filter material or polypropylene filter material.

[0010] The utility model provides a convex spherical smoke filter layer, which has the following beneficial effects:

[0011] 1. It is suitable for making filter elements of gas filter canisters with filter materials that cannot be heat-processed and formed, such as glass fiber filter paper, and meets the requirements of various protections of arc-shaped gas filter canisters (such as oil mist penetration efficiency, sodium salt filtration efficiency and other indicators).

[0012] 2. The folds are evenly spaced to reduce the resistance of the gas filter canister.

[0013] 3. The spherical structure fits the mask cheek better and effectively reduces the canister suspension torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a cross-sectional view of the convex spherical smoke filter layer of the utility model;

[0016] Figure 2 It is a top view of the convex spherical smoke filter layer of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of spraying connecting glue on one side of the folded filter membrane;

[0018] Figure 4 It is the discounted filter material;

[0019] Figure 5 It is a schematic diagram of the structure of connecting the ends of the long strip folded filter strip;

[0020] Figure 6 It is a schematic diagram of the tightening process operation;

[0021] Figure 7 This is a schematic diagram of the canning operation;

[0022] Figure 8 This is a schematic diagram of the placement of the filter element pressing block;

[0023] In the figure: housing 1, support seat 101, annular support surface 102; filter element 2, pleated filter membrane 201, connecting glue 202; elastic sealant 3; support plate 4; tightening arc plate 5; tightening push rod 6; filter element fixing cylinder 7, center hole 701; filter element pressing block 8, elastic sealant injection hole 801. DETAILED DESCRIPTION

[0024] like Figure 1~2As shown, a convex spherical smoke filter layer includes a shell 1 and a filter element 2. The shell 1 is a spherical crown structure. A support seat 101 is provided in the center of the shell 1 to support the middle part of the filter element 2. The support seat 101 is arranged at the air inlet position of the shell 1. The support seat 101 includes a supporting surface and a plurality of supporting blocks arranged at the bottom of the supporting surface. The supporting blocks are connected to the shell 1, and gas channels are formed between the supporting blocks. An annular supporting surface 102 is provided around the shell 1 to support the pleated filter membrane 201.

[0025] The filter element 2 includes a wavy pleated filter membrane 201, which is an arc-shaped ring structure. After the filter element 2 is installed in the housing 1, the angle between the arc surface of the filter element 2 and the horizontal is not too large, and varies between about 0° and 15°. The filter element is not a conventional plane filter element, but a long strip plane filter element connected end to end, with the center of the circle placed on the bottom surface of the housing 1 and the circumference placed on the annular support surface 102. The circumference is not in the same plane as the center of the circle, and is assembled with the housing 1 to form a filter element with a curved surface and a convex spherical shape.

[0026] Elastic sealant 3 is provided on the inner circle of the pleated filter membrane 201 and between the pleated filter membrane 201 and the housing 1. The middle part and the outer edge of the filter element 2 and the housing 1 are sealed to ensure that all the air to be filtered entering from the inlet is filtered by the filter element before entering other parts of the canister, thereby achieving the specified filtering efficiency.

[0027] In this embodiment, the front and / or back sides of the pleated filter membrane 201 are provided with a connecting glue 202, and the connecting glue 202 is evenly distributed and connected between each fold of the pleated filter membrane 201. The connecting glue is a flexible glue that can be evenly distributed and connected between each fold of the filter material. When used, the connecting glue can be a hot melt glue. The front side of the pleated filter membrane 201 has a circle of glue or both sides have a circle of glue, that is, the connecting glue 202 can be set on one side or both sides, such as Figure 3 , which is a schematic diagram of the structure in which the connecting adhesive 202 is set on one side.

[0028] The connecting glue 202 can be located at different positions in the area between the center and the circumference of the pleated filter membrane 201 depending on the thickness and flexibility of the glue line.

[0029] In this embodiment, the material of the pleated filter membrane 201 is one of glass fiber material, PTFE filter material or polypropylene filter material.

[0030] When used specifically, the following processing steps are used for preparation:

[0031] Prepare the housing for the convex spherical filter element. The outer surface of the housing is spherical, the inner periphery is round, the bottom has a surface to support the center end of the filter element, and the inner periphery has the edge end support surface of the filter element. Figure 1 The angle between the curved surface of the filter element and the horizontal surface should not be too large, and it varies between about 0° and 15°. It is adjusted and determined according to the adhesion, flexibility and plasticity of the connecting glue and the material processing of the filter material; the filter material to be used, the filter material is a filter material that can filter toxic and harmful aerosols, and can be glass fiber materials, PTFE filter materials, polypropylene and other materials that can be filtered; the elastic sealant to be used can be the elastic sealant used for general gas filter canister processing; the connecting glue to be used has strong adhesion, good flexibility and plasticity; folding equipment, etc.

[0032] Step 1: Figure 4 As shown, filter material is prepared, the filter material is folded by a folding machine, and after folding, the filter material is cut into long strips of processed material.

[0033] If processing glass fiber filter materials, etc., requires connecting glue to fix the filter materials into folded arc-shaped smoke filter layer filter elements, the connecting glue can be added on one side or on both sides during the folding process. According to the required position of the connecting glue, when folding, control the position of the nozzle for adding the connecting glue to maximize the utilization rate of the filter material.

[0034] If processing other non-glass fiber filter materials such as PTFE and other heat-settable arc-shaped smoke filter layer filter elements, connecting glue can be added or not during the folding process.

[0035] The filter material with connecting glue folded by the machine is cut into small strips one by one.

[0036] During the cutting process, ensure that the connection glue on each small strip is in the same position. However, depending on the width of each small strip, the thickness and flexibility of the connection glue line are different, and it can be in different positions on the small strip. At the same time, there is only one circle of connection glue on each small strip, and the connection glue can be added on one side or on both sides at the corresponding position. The connection glue is a flexible glue that can be evenly distributed and connected between each fold of the filter material.

[0037] Step 2: Connect the ends and form.

[0038] like Figure 5 As shown, the cut long strips of processed materials are bonded end to end to form a ring-shaped pleated filter membrane 201 to form a filter element 2. When connecting the ends, it is necessary to ensure that the connection between the filter materials at the end is completely sealed with glue to prevent air leakage at the bonding point.

[0039] Step 3: Tighten.

[0040] like Figure 6 As shown, the filter element 2 is placed on the support plate 4, the tightening arc plate 5 is placed on the outside of the filter element 2, and the tightening arc plate 5 is pushed to tighten the filter element 2. After the tightening is completed, the filter element 2 is fixed by the filter element fixing cylinder 7, and the filter element pressing block 8 is placed from the center hole 701 of the filter element fixing cylinder 7.

[0041] During the tightening process, force must be applied evenly all around to avoid damaging the outer periphery of the filter material. Tightening the arc plate 5 is conducive to tightening the filter element 2.

[0042] Step 4: Canning.

[0043] like Figure 7 As shown, the support plate 4 together with the filter element 2 and the filter element fixing cylinder 7 are moved to the upper side of the housing 1, the support plate 4 is tilted, and the support plate 4 is slowly pulled out. When the support plate 4 is pulled out, the filter element 2 is released from the filter element fixing cylinder 7 under the action of the filter element pressing block 8. After the support plate 4 is pulled out, the filter element 2 and the filter element pressing block 8 fall into the housing 1.

[0044] like Figure 8 As shown, step five, block dispensing: inject elastic sealant from the elastic sealant injection hole 801 of the filter element block 8, and place the filter element block 8 on the surface of the filter element 2 until the elastic sealant solidifies and then take out the filter element block 8.

[0045] Step 6: Glue filling around: Fill the space between the filter element 2 and the housing 1 with elastic sealant to obtain a qualified smoke filter layer.

Claims

1. A convex spherical smoke filter layer, comprising a housing (1) and a filter element (2), characterized in that: The housing (1) is in a spherical crown structure, and the filter element (2) comprises a wavy pleated filter membrane (201), the pleated filter membrane (201) is in an arc-shaped ring structure, and elastic sealant (3) is provided on the inner ring of the pleated filter membrane (201) and between the pleated filter membrane (201) and the housing (1).

2. The convex spherical smoke filter layer according to claim 1, characterized in that: A support seat (101) for supporting the middle of the filter element (2) is provided at the center of the housing (1), and an annular support surface (102) for supporting the pleated filter membrane (201) is provided around the inside of the housing (1).

3. The convex spherical smoke filter layer according to claim 1, characterized in that: A connecting glue (202) is provided on the front side and / or the back side of the pleated filter membrane (201), and the connecting glue (202) is evenly distributed and connected between each fold of the pleated filter membrane (201).

4. The convex spherical smoke filter layer according to claim 1, characterized in that: The angle between the curved surface of the pleated filter membrane (201) and the horizontal direction is 0° to 15°.

5. The convex spherical smoke filter layer according to claim 1, characterized in that: The material of the pleated filter membrane (201) is one of glass fiber material, PTFE filter material or polypropylene filter material.

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