Novel flow path for protecting pipeline of VOCs portable detector from being polluted and blocked

Abstract

The utility model discloses a novel flow path for protecting pollution and blockage of a pipeline of a VOCs (volatile organic compounds) portable detector. The novel flow path comprises a sampling unit and a filtering unit, the sampling unit comprises a sampling probe rod, an inlet of the sampling probe rod is connected with a sampling tube, and an outlet of the sampling probe rod is connected with a sampling handle; sample gas pipelines for circulating sample gas are arranged in the sampling handle and the sampling probe rod; the filtering unit comprises a stainless steel filter, a micro dewatering filter and a filtering membrane; according to the utility model, the sampling unit and the filtering unit are internally provided with a stainless steel filter, a micro dewatering filter, a filtering membrane and other multiple filtering means, so that the comprehensive purification of sample gas is realized; the stainless steel filter can preliminarily filter particulate matters in the sample gas, the micro dewatering filter further removes water vapor in the sample gas, and the filter membrane is used as a final filter layer to ensure that the sample gas entering the FID chamber is pure and pollution-free, so that the accuracy and the stability of the detector are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical field especially relates to a novel protection VOCs portable detector pipeline pollution and the flow path of blocking. BACKGROUND

[0002] In laboratory and industrial environment, the detection of volatile organic compounds (VOCs) is crucial. Traditional portable VOCs detector usually extracts sample gas to FID (flame ionization detector) chamber for combustion sampling analysis through micro diaphragm pump. However, in the actual application process, the pipeline system of the detector often faces the problems of pollution and blockage, which seriously affects the accuracy and stability of the instrument.

[0003] Specifically, the traditional detector only sets a filter membrane (such as shown in Figure 6 ) in the probe rod to filter impurities in the sample gas. However, this single filtering method often cannot effectively prevent particulate matter and water vapor and other pollutants from entering the pipeline system. Particulate matter not only easily blocks the pipeline, but also accelerates the wear of the filter membrane, resulting in increased replacement frequency, thereby increasing the maintenance cost. At the same time, the presence of water vapor also pollutes the subsequent diaphragm pump and FID chamber, further affecting the detection performance and service life of the instrument.

[0004] In order to solve the above problems, the market urgently needs a protection device that can effectively prevent pipeline pollution and blockage. Such a device needs to be able to filter out particulate matter and water vapor in the sample gas at the same time, ensuring that the sample gas entering the FID chamber is pure and free of pollution. In addition, the protection device should also have the characteristics of easy maintenance, low replacement cost and long service life of the detector.

[0005] Therefore, the utility model provides a novel protection VOCs portable detector pipeline pollution and blockage flow path device, which realizes effective purification of sample gas by combining stainless steel filter, micro water removal filter and filter membrane and other multiple filtering means, solving the problems of pipeline pollution and blockage existing in the use of traditional detector. SUMMARY

[0006] This part aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] Therefore, in order to solve the above technical problems, the utility model provides the following technical scheme: a novel protection VOCs portable detector pipeline pollution and blockage flow path, comprising a sampling unit and a filtering unit;

[0008] The sampling unit comprises a sampling probe, a sampling tube is connected at the inlet of the sampling probe for extracting sample gas to be detected, a sampling handle is connected at the outlet of the sampling probe for facilitating handheld operation, and a sample gas pipeline is arranged in the sampling handle and the sampling probe for sample gas flow.

[0009] The filtering unit comprises a stainless steel filter, a micro water removal filter and a filter membrane, the stainless steel filter is arranged at the connection between the sampling tube and the sampling probe for preliminarily filtering particulate matters in the sample gas, the micro water removal filter is arranged at the side of the sampling probe close to the sampling handle for further filtering water vapor in the sample gas, and the filter membrane is arranged at the side of the sampling handle close to the sampling probe as a final filter layer for further purifying the sample gas.

[0010] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blocked flow path, the sampling tube is arranged at the inlet of the sampling probe in a downward inclination, and the connection between the sampling tube and the sampling probe is in a circular arc structure.

[0011] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blocked flow path, the aperture of the stainless steel filter is less than or equal to 5 mm, which effectively prevents particulate matters from entering the sample gas pipeline, and the stainless steel filter is installed at a position about 2 cm from the inlet of the sampling probe to ensure that the particulate matters are effectively filtered before entering the sample gas pipeline.

[0012] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blocked flow path, the bottom of the micro water removal filter is provided with a water outlet, the micro water removal filter filters water vapor in the sample gas to ensure that the inside of the sample gas pipeline is dry, increase the use efficiency and service life of the filter membrane, and protect the subsequent diaphragm pump and FID chamber from pollution.

[0013] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blocked flow path, an O-shaped sealing ring is arranged at the connection between the filter membrane and the inner cavity of the sampling handle to ensure the air tightness of the inner cavity of the sampling handle.

[0014] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blocked flow path, an installation cavity is formed in the sampling probe at a position corresponding to the filter membrane, the filter membrane is arranged in the installation cavity, a sealing sleeve is arranged outside the installation cavity, and the sealing sleeve is also sealingly connected with the sampling handle through a sealing ring structure.

[0015] As a preferred scheme of the novel protection VOCs portable detector pipeline pollution and blockage of flow path, wherein: the filter membrane includes a diaphragm body and a mounting seat, the diaphragm body is arranged corresponding to the position of the sample gas pipeline, the mounting seat is arranged at the outer edge of the diaphragm body, the cross section of the mounting seat is an annular structure with the inside wide and the outside narrow, the contact area of the whole filter membrane and the sampling handle is improved, and the sample gas leakage is prevented.

[0016] The utility model discloses the beneficial effect:

[0017] 1, the utility model discloses possess multiple filtration medium, effectively prevent the pollutant from entering: the utility model discloses a plurality of filtration means such as setting up stainless steel filter, micro water trap filter and filter membrane in sampling unit and filter unit, realizes the overall purification of sample gas. The stainless steel filter can filter out the particulate matter in the sample gas initially, and the micro water trap filter further removes the water vapor in the sample gas, and the filter membrane is as the final filter layer, ensuring that the sample gas entering the FID chamber is pure and pollution-free. This multiple filtration medium effectively prevents the pollutant from entering the pipeline system, improves the accuracy and stability of the detector.

[0018] 2, the utility model discloses through optimizing structure design, improves the filtration efficiency of device, the stainless steel filter in the scheme adopts small aperture design (aperture is less than or equal to 5mm), can effectively prevent the entry of small particulate matter, and simultaneously, the bottom of micro water trap filter is provided with a drain, can discharge the water vapor filtered out in time, guarantees the dryness inside the pipeline, in addition, the connecting place of filter membrane and sampling handle inner chamber is arranged with O type sealing ring, ensures the air tightness of sampling handle inner chamber, prevents sample gas leakage, and these optimization structure designs improve the filtration efficiency, prolong the service life of filter membrane.

[0019] 3, the utility model discloses easy to maintain, reduces maintenance cost, the pipeline design structure of the utility model is simple and clear, and the connection between various components is close and reliable, when needing to replace filter membrane or carrying out other maintenance operation, only needs simple disassembly relevant components, does not need complicated operation process, and this easy-to-maintain design reduces the maintenance cost, improves the work efficiency. ACCURACY

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings. Wherein:

[0021] Figure 1 It is the whole structure schematic diagram of the utility model.

[0022] Figure 2 is a sectional structure schematic view of the present application.

[0023] Figure 3 is a mounting structure schematic view of the stainless steel filter of the present application.

[0024] Figure 4 is a mounting structure schematic view of the filter membrane of the present application.

[0025] Figure 5 is a work flow chart of the present application.

[0026] Figure 6 is a work flow chart of the prior art.

[0027] In the figure: 100, sampling unit; 101, sampling probe; 102, sampling tube; 103, sampling handle; 104, sample gas pipeline;

[0028] 200, filtering unit; 201, stainless steel filter; 202, micro water removal filter; 2021, water outlet; 203, filter membrane; 2031, membrane main body; 2032, mounting seat; 204, O-shaped sealing ring; 205, mounting cavity; 206, sealing sleeve. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can be practiced in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0031] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0032] Thirdly, the present application is described in detail in conjunction with the schematic view, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0033] Referring toFigures 1-5 The utility model provides an embodiment provides a novel protection VOCs portable detector pipeline pollution and blocked flow path, including sampling unit 100 and filter unit 200,

[0034] The sampling unit 100 includes sampling probe 101, the inlet of sampling probe 101 is connected with sampling tube 102, for extracting the sample gas to be detected, the sampling tube 102 is arranged at the inlet of sampling probe 101 and is inclined downward, the connection of sampling tube 102 and sampling probe 101 is circular arc structure, the outlet of sampling probe 101 is connected with sampling handle 103, which is convenient for handheld operation, the sampling handle 103 and sampling probe 101 are both provided with sample gas pipeline 104 for sample gas flow,

[0035] The filter unit 200 includes stainless steel filter 201, micro water removal filter 202 and filter membrane 203, the stainless steel filter 201 is arranged at the connection of sampling tube 102 and sampling probe 101, for preliminary filtering particulate matter in sample gas, the aperture of stainless steel filter 201 is less than or equal to 5mm, effectively prevents particulate matter from entering sample gas pipeline 104, the stainless steel filter 201 is installed at the position about 2cm of the inlet of sampling probe 101, to ensure that particulate matter is effectively filtered before entering sample gas pipeline 104, the micro water removal filter 202 is arranged at the side of sampling rod close to sampling handle 103, for further filtering water vapor in sample gas, the bottom of micro water removal filter 202 is provided with drain 2021, micro water removal filter 202 removes water vapor in sample gas, ensures that sample gas pipeline 104 is dry, increases the use efficiency and life of filter membrane 203, and protects subsequent diaphragm pump and FID chamber from pollution, the filter membrane 203 is arranged at the side of sampling handle 103 close to sampling probe 101, as the final filter layer, further purifies sample gas, the connection of filter membrane 203 and the inner chamber of sampling handle 103 is provided with O-shaped sealing ring 204, for ensuring the air tightness of the inner chamber of sampling handle 103,

[0036] The sampling probe 101 is provided with mounting cavity 205 corresponding to the position of filter membrane 203, the filter membrane 203 is arranged in mounting cavity 205, the outer portion of mounting cavity 205 is provided with sealing sleeve 206, the sealing sleeve 206 can also be sealingly connected with sampling handle 103 through sealing ring structure, the filter membrane 203 includes diaphragm main body 2031 and mounting seat 2032, the diaphragm main body 2031 is arranged corresponding to the position of sample gas pipeline 104, the mounting seat 2032 is arranged at the outer edge of diaphragm main body 2031, the cross section of mounting seat 2032 is annular structure with inner wide and outer narrow, improves the contact area of filter membrane 203 and sampling handle 103 as a whole, prevents sample gas leakage.

[0037] In the embodiment, in actual use, the sampling probe 101 draws the sample gas to be detected through the sampling tube 102. The sampling tube 102 is arranged downwardly at the inlet of the sampling probe 101, facilitating the smooth entry of the sample gas. Meanwhile, the connection between the sampling tube 102 and the sampling probe 101 is in a circular arc structure, reducing the resistance of the sample gas in the flow process.

[0038] After entering the sampling probe 101, the sample gas is firstly subjected to preliminary filtration by the stainless steel filter 201, the aperture of which is about 5 mm, which can effectively prevent particulate matters from entering the sample gas pipeline 104.

[0039] The sample gas subjected to preliminary filtration continues to flow in the sampling pipeline 104 to the micro water removal filter 202, through which the water vapor in the sample gas is removed, ensuring the dryness inside the sample gas pipeline 104. Meanwhile, the water vapor filtered out can be timely discharged through the water outlet 2021 arranged at the bottom of the micro water removal filter 202.

[0040] The sample gas subjected to water removal treatment is finally subjected to final filtration by the filter membrane 203. As the final filtration layer, the filter membrane 203 can further purify the sample gas, ensuring that the sample gas entering the FID chamber is pure and uncontaminated, avoiding the drift of data and repeated work, causing the waste of time and the loss of enterprise shutdown. Meanwhile, the filter membrane 203 is arranged with the O-shaped sealing ring 204 at the connection with the inner cavity of the sampling handle 103, ensuring the air tightness of the inner cavity of the sampling handle 103.

[0041] The sample gas subjected to comprehensive purification enters the FID chamber for combustion sampling analysis, and finally the accurate detection result is obtained.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A novel flow path to protect the VOCs portable detector tubing from contamination and clogging, characterized in that: The sampling unit (100) and the filtering unit (200) are comprised; The sampling unit (100) comprises a sampling probe (101), a sampling tube (102) is connected at the inlet of the sampling probe (101) for extracting sample gas to be detected; a sampling handle (103) is connected at the outlet of the sampling probe (101) for facilitating handheld operation; a sample gas pipeline (104) is arranged in the sampling handle (103) and the sampling probe (101) for sample gas flow. The filtering unit (200) comprises a stainless steel filter (201), a micro water removal filter (202) and a filter membrane (203); the stainless steel filter (201) is arranged at the connection between the sampling tube (102) and the sampling probe (101) for preliminarily filtering particulate matters in the sample gas; the micro water removal filter (202) is arranged at the side of the sampling probe close to the sampling handle (103) for further filtering water vapor in the sample gas; and the filter membrane (203) is arranged at the side of the sampling handle (103) close to the sampling probe (101) as a final filter layer for further purifying the sample gas.

2. The novel flow path for protecting the VOCs portable detector tubing from contamination and clogging as claimed in claim 1, wherein: The sampling tube (102) is arranged at the inlet of the sampling probe (101) in a downward inclination, and the connection between the sampling tube (102) and the sampling probe (101) is in a circular arc structure.

3. The novel flow path for protecting the VOCs portable detector tubing from contamination and clogging as claimed in claim 1, wherein: The bottom of the micro water removal filter (202) is provided with a water outlet (2021); the micro water removal filter (202) filters water vapor in the sample gas to ensure the dryness inside the sample gas pipeline (104), increase the use efficiency and service life of the filter membrane (203), and protect the subsequent diaphragm pump and FID chamber from pollution.

4. The novel flow path for protecting the VOCs portable detector tubing from contamination and clogging according to claim 1, wherein: An O-shaped sealing ring (204) is arranged at the connection between the filter membrane (203) and the inner cavity of the sampling handle (103) for ensuring the air tightness of the inner cavity of the sampling handle (103).

5. The novel flow path for protecting the VOCs portable detector tubing from contamination and clogging as claimed in claim 1, wherein: An installation cavity (205) is arranged at the position of the sampling probe (101) corresponding to the filter membrane (203) and adapted to the structure of the filter membrane (203); the filter membrane (203) is arranged in the installation cavity (205); and a sealing sleeve (206) is arranged outside the installation cavity (205) and sleeved with the front end of the sampling handle (103).

6. The novel flow path for protecting the VOCs portable detector tubing from contamination and clogging as claimed in claim 1, wherein: The filter membrane (203) comprises a membrane body (2031) and a mounting seat (2032); the membrane body (2031) is arranged at the position corresponding to the sample gas pipeline (104); and the mounting seat (2032) is arranged at the outer edge of the membrane body (2031) and has an annular structure with a wide inner part and a narrow outer part.

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