Badge type passive sampler

Abstract

The utility model discloses a badge type passive sampler which comprises a cover, an end cover, a connecting piece and a base, the base is of a cylindrical structure, a groove is formed in the top of the base, and the bottom membrane layer filter membrane and the absorption layer filter membrane are arranged in the groove; the connecting piece is in buckled connection with the base, the bottom membrane layer filter membrane and the absorption layer filter membrane are clamped and fixed between the inner bottom of the groove and the connecting piece, and a first sealing piece is arranged between the outer circumferential surface of the connecting piece and the inner circumferential surface of the groove; the end cover is connected with the top of the connecting piece in a buckled mode, and a wind blocking net and a dustproof film are arranged in the end cover and clamped and fixed between the top of the connecting piece and the end cover. The cover covers the end cover and surrounds the top of the connecting piece, and a second sealing piece is arranged between the outer circumferential surface of the connecting piece and the inner circumferential surface of the cover; the connecting piece and the base are connected in a buckling manner, so that the operation is convenient, the sealing performance of the sampler is improved, and the validity period of the sampler is prolonged; meanwhile, absorption liquid is prevented from contaminating the base, and the recovery rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a badge type passive sampler and belongs to the technical field of air pollutant monitoring. BACKGROUND

[0002] According to different classification standards, passive samplers can be roughly divided into the following types: according to different absorption principles, they can be divided into permeation type and diffusion type; according to different states of collected pollutants, they can be divided into gas passive samplers and liquid passive samplers; according to different geometric shapes, they can be divided into badge type passive samplers and tube type passive samplers; among them, the badge type passive sampler is similar to a button, has a short diffusion distance, a large diffusion area, and a high sampling efficiency, but is easily affected by wind speed, so the badge type passive sampler usually contains a wind-blocking layer, so that the collection of pollutants is only completed by diffusion.

[0003] Patent No. ZL200720069075.0 discloses a kind of unpowered diffusion sampler, the unpowered diffusion sampler is a closed container with a sampling port, comprising an end cap, a wind-blocking layer, a middle connecting piece, an absorption layer, a plurality of joints are provided between the end cap and the middle connecting piece, and the connection mode of the joint and the middle connecting piece is sealed connection; It overcomes the defects of small diffusion cross-sectional area, large system error and large influence of sampling rate by external wind speed in the prior art.

[0004] The existing sampler (Patent No. ZL200720069075.0) has the following problems:

[0005] (1) The sealing performance is relatively poor, resulting in a short effective period of the sampler;

[0006] (2) There is only one absorption layer at the bottom, and the absorption liquid can be contaminated by the bottom cover, reducing the recovery rate;

[0007] (3) The absorption layer is filter paper, and the extraction process will produce debris, which must be filtered, affecting the detection efficiency;

[0008] (4) The sampler has few colors, making it difficult to distinguish different types of samplers. UTILITY MODEL CONTENT

[0009] In order to solve the problems existing in the prior art, the utility model provides a badge type passive sampler.

[0010] The technical solution adopted by the utility model is as follows:

[0011] The utility model relates to a badge type passive sampler, including lid, end cover, connecting piece and base, the base is cylindrical structure, forms the recess at the top of base, sets up the filter membrane of bottom membrane layer and absorption layer filter membrane in the recess, the connecting piece is tubular structure, the connecting piece is buckled with base, and the connecting piece bottom is located in recess inside, and the filter membrane of bottom membrane layer and absorption layer filter membrane are clamped and fixed between the recess inside bottom and connecting piece, and the first sealing piece is arranged between the outer circumferential surface of connecting piece and the inner circumferential surface of recess, the end cover is buckled with the top of connecting piece, and the end cover forms the through -hole, and the inside of end cover sets up the wind -proof net and dustproof membrane, and the wind -proof net and dustproof membrane are clamped and fixed between the top of connecting piece and end cover, the lid covers the end cover, and the connecting piece top is surrounded by the lid, and the second sealing piece is arranged between the outer circumferential surface of connecting piece and the inner circumferential surface of lid.

[0012] As the utility model's preferred, two annular clamping groove structures are formed on the outer circumferential surface of the connecting piece, and the first sealing piece and the second sealing piece are respectively sleeved at the two annular clamping groove structures.

[0013] As the utility model's preferred, the first sealing piece and the second sealing piece are O-shaped silica gel sealing rings.

[0014] As the utility model's preferred, a buckle groove structure corresponding to the first sealing piece is formed on the inner circumferential surface of the recess, and a buckle groove structure corresponding to the second sealing piece is formed on the inner circumferential surface of the lid.

[0015] As the utility model's preferred, a clamping portion is formed on the top of the connecting piece, and the end cover is buckled with the clamping portion on the top of the connecting piece.

[0016] As the utility model's preferred, the filter membrane of the bottom membrane layer is a hydrophobic filter membrane, and the filter membrane of the absorption layer is a hydrophilic filter membrane or a hydrophobic filter membrane.

[0017] As the utility model's preferred, the wind -proof net is a stainless steel wire net or nylon net, and the dustproof membrane is a hydrophobic filter membrane.

[0018] As the utility model's preferred, at least one of the lid, the end cover, the connecting piece and the base has a bright color, and the bright color is used for distinguishing different kinds of samplers.

[0019] As the utility model's preferred, the lid, the end cover, the connecting piece and the base are made of the same material, and are all made of polypropylene material.

[0020] The utility model has the advantages of:

[0021] (1) the buckle connection mode is adopted between the connecting piece and the base, which is more convenient to operate than other connection modes;

[0022] (2) Design two annular clamping groove structures on the connecting piece, and install sealing pieces at the two annular clamping groove structures respectively, so as to increase the sealing property of the sampler and prolong the effective period of the sampler;

[0023] (3) Increase a bottom membrane filter film under the absorption layer filter film, prevent the absorption liquid from staining the base, and improve the recovery rate;

[0024] (4) Change the existing absorption layer filter paper or non-woven fabric into a polytetrafluoroethylene hydrophilic membrane or a hydrophobic membrane, and no debris is generated in the extraction process;

[0025] (5) Part of the parts are bright in color, so as to facilitate the differentiation of different types of samplers;

[0026] (6) The unified material of part of the parts facilitates production and manufacturing, and saves raw material cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the decomposition structure of the utility model;

[0028] Figure 2 is a schematic diagram of the assembled utility model;

[0029] Figure 3 is Figure 2 A towards the sectional view schematic diagram in;

[0030] Figure 4 is Figure 3 B place enlarged schematic diagram in.

[0031] Meaning of the reference signs in the drawing:

[0032] 1-cap, 2-end cover, 3-connecting piece, 4-base;

[0033] 5-groove, 6-through hole, 7-annular clamping groove structure, 8-buckling groove structure, 9-clamping part;

[0034] 11-bottom membrane filter film, 12-absorption layer filter film, 13-windproof net, 14-dustproof film;

[0035] 21-first sealing piece, 22-second sealing piece. DETAILED DESCRIPTION

[0036] The utility model will be specifically introduced below in combination with the drawings and specific embodiments.

[0037] For example, Figures 1-4As shown, the embodiment is a badge type passive sampler, comprising a cover 1, an end cap 2, a connecting piece 3 and a base 4; wherein the base 4 is a cylindrical structure, a groove 5 is formed at the top of the base 4, a bottom membrane filter 11 and an absorption layer filter 12 are arranged inside the groove 5; the connecting piece 3 is a tubular structure, the connecting piece 3 is snap connected with the base 4, and the bottom of the connecting piece 3 is located inside the groove 5, the bottom membrane filter 11 and the absorption layer filter 12 are clamped and fixed between the bottom of the groove 5 and the connecting piece 3, a first sealing element 21 is arranged between the outer circumferential surface of the connecting piece 3 and the inner circumferential surface of the groove 5; the end cap 2 is snap connected with the top of the connecting piece 3, the end cap 2 is formed with a through hole 6, a windproof net 13 and a dustproof film 14 are arranged inside the end cap 2, and the windproof net 13 and the dustproof film 14 are clamped and fixed between the top of the connecting piece 3 and the end cap 2; the cover 1 covers the end cap 2, and the cover 1 surrounds the top of the connecting piece 3, a second sealing element 22 is arranged between the outer circumferential surface of the connecting piece 3 and the inner circumferential surface of the cover 1; when in use, the cover 1 is removed, and the through hole 6 on the end cap 2 serves as a sampling port for air to pass through.

[0038] Two annular clamping groove structures 7 are formed on the outer circumferential surface of the connecting piece 3 in the embodiment, and the first sealing element 21 and the second sealing element 22 are respectively sleeved on the two annular clamping groove structures 7; in the embodiment, the first sealing element 21 and the second sealing element 22 are O-shaped silica gel sealing rings, which are used to increase the sealing performance of the sampler and prolong the effective period of the sampler; in actual use, other types of sealing elements with similar materials can also be used.

[0039] A clamping groove structure 8 corresponding to the first sealing element 21 is formed on the inner circumferential surface of the groove 5 in the embodiment, and a clamping groove structure corresponding to the second sealing element 22 is formed on the inner circumferential surface of the cover 1.

[0040] A clamping part 9 is formed on the top of the connecting piece 3 in the embodiment, and the end cap 2 is snap connected with the clamping part 9 on the top of the connecting piece 3.

[0041] The bottom membrane filter 11 is a hydrophobic filter film, and in the embodiment, the bottom membrane filter 11 is a hydrophobic polytetrafluoroethylene filter film.

[0042] The absorption layer filter 12 is a hydrophilic filter film or a hydrophobic filter film, and in the embodiment, the absorption layer filter 12 is a hydrophilic polytetrafluoroethylene filter film; in actual application, the absorption layer filter 12 can also be a hydrophobic polytetrafluoroethylene filter film.

[0043] The windproof net 13 is a stainless steel mesh, and in actual application, the windproof net 13 can also be a nylon mesh.

[0044] The dustproof film 14 is a hydrophobic filter film, and in the embodiment, the dustproof film 14 is a hydrophobic polytetrafluoroethylene filter film.

[0045] In the embodiment, at least one of the cover 1, the end cover 2, the connecting piece 3 and the base 4 has a bright color, the bright color is used for distinguishing different kinds of samplers, the bright color can adopt red, orange, yellow, green, blue and the like, if two or more of the cover 1, the end cover 2, the connecting piece 3 and the base 4 have bright colors, the bright colors are the same, for example, the base 4 and the cover 1 have red simultaneously, or the cover 1, the end cover 2 and the connecting piece 3 have yellow simultaneously, so that the kinds of samplers can be distinguished intuitively; in actual use, the basic color of the cover 1, the end cover 2, the connecting piece 3 and the base 4 is transparent natural color, without adding any color, which is also a basic type in the sampler, or the basic color adopts transparent white color, black and the like.

[0046] In the embodiment, the cover 1, the end cover 2, the connecting piece 3 and the base 4 are made of the same material, i.e., polypropylene material; the unified material is used, so that the production and manufacturing are facilitated, and the raw material cost is saved.

[0047] In the description of the utility model, it is understood that: the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model, and cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model; in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the utility model, it is understood that: unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "setting", "forming" should be understood broadly; for example: it can be fixedly connected, set, or can be detachably connected, or an integral structure is adopted; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements; for those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0049] In the description of the utility model, the terms "embodiment", "specific example" or "actual application" and the like mean that the specific features, structures, materials or characteristics described in combination with the embodiment are contained in at least one embodiment or example of the utility model; the illustrative description of the above terms does not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above embodiments are only used to illustrate the technical solutions of the present application, and those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A badge-style passive sampler, characterized by: The sampler comprises a cover, an end cap, a connecting piece and a base; the base is a cylindrical structure, a groove is formed at the top of the base, a bottom membrane filter and an absorption layer filter are arranged in the groove; the connecting piece is a tubular structure, the connecting piece is buckled with the base, and the bottom of the connecting piece is located in the groove, the bottom membrane filter and the absorption layer filter are clamped and fixed between the bottom of the groove and the connecting piece, a first sealing member is arranged between the outer circumferential surface of the connecting piece and the inner circumferential surface of the groove; the end cap is buckled with the top of the connecting piece, the end cap is provided with a through hole, a windproof net and a dustproof film are arranged in the end cap, and the windproof net and the dustproof film are clamped and fixed between the top of the connecting piece and the end cap; the cover covers the end cap, and the cover surrounds the top of the connecting piece; a second sealing member is arranged between the outer circumferential surface of the connecting piece and the inner circumferential surface of the cover.

2. The badge-style passive sampler of claim 1, wherein, Two annular clamping groove structures are formed on the outer circumferential surface of the connecting piece, and the first sealing member and the second sealing member are respectively sleeved on the two annular clamping groove structures.

3. The badge-style passive sampler of claim 1 or 2, wherein, The first sealing member and the second sealing member are O-shaped silica gel sealing rings.

4. The badge-type passive air sampler according to claim 1 or 2, characterized in that, A clamping groove structure corresponding to the first sealing member is formed on the inner circumferential surface of the groove, and a clamping groove structure corresponding to the second sealing member is formed on the inner circumferential surface of the cover.

5. The badge-type passive air sampler according to claim 1 or 2, wherein A clamping portion is formed on the top of the connecting piece, and the end cap is buckled with the clamping portion on the top of the connecting piece.

6. The badge-style passive sampler of claim 1, wherein, The bottom membrane filter is a hydrophobic filter, and the absorption layer filter is a hydrophilic filter or a hydrophobic filter.

7. The badge-style passive sampler of claim 1, wherein, The windproof net is a stainless steel wire mesh or a nylon mesh, and the dustproof film is a hydrophobic filter.

8. The badge-style passive sampler of claim 1, wherein, At least one of the cover, the end cap, the connecting piece and the base has a bright color, and the bright color is used to distinguish different kinds of samplers.

9. The badge-style passive sampler of claim 1 or 8, wherein, The cover, the end cap, the connecting piece and the base are made of the same material, and are all made of polypropylene material.

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