CN110160855B - Gas dilution sampling joint and method of use - Google Patents
Gas dilution sampling joint and method of use Download PDFInfo
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- CN110160855B CN110160855B CN201910539134.3A CN201910539134A CN110160855B CN 110160855 B CN110160855 B CN 110160855B CN 201910539134 A CN201910539134 A CN 201910539134A CN 110160855 B CN110160855 B CN 110160855B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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Abstract
The invention discloses a gas dilution sampling joint, which comprises a tubular shell, a front cover, a rear cover, an air inlet, an air outlet, a sampling column, a filtering module, a first porous partition plate, a porous fiber column, a sample gas sampling hole and a second porous partition plate, wherein the front cover and the rear cover are connected with the top and the bottom of the shell through threads, the air inlet is arranged on the front cover, the air outlet is arranged on the rear cover, the sampling column is arranged inside the shell and is coaxial with the shell, the filtering module is arranged around the outer side of the sampling column, the first porous partition plate is detachably arranged on the upper side of the inside of the shell, the porous fiber column is arranged on the upper part of the sampling column, the sample gas sampling hole is arranged on the lower part of the sampling column and is connected with the porous fiber column, and the second porous partition plate is arranged on the lower side of the inside of the shell. The invention mainly aims at the sampling requirement in a high-concentration polluted gas environment, directly dilutes the sampled gas in a fixed proportion dilution mode, and then sends the diluted sampled gas into the detection equipment for detection, and has the advantages of small volume, light weight, simple structure, high modularization degree and easy maintenance.
Description
Technical Field
The invention relates to a sampling device, in particular to a gas dilution sampling joint and a use method thereof.
Background
When a large amount of dangerous chemicals leak and a fire accident occurs, the concentration of dangerous gas is often hundreds of thousands times that of daily trace leakage, and the gas detector equipped by the fire department often has concentration false alarm and sensor poisoning, so that the error is fatal to on-site rescue personnel and is not suitable for use during emergency rescue. In the concentration detection process, the sampled gas is required to be diluted according to a certain proportion and then is sent into detection equipment for detection, and in the existing concentration detection method, if a dilution function is required to be realized, a dilution gas source is required to be arranged for diluting the standard gas, meanwhile, a gas path system for realizing mixing of different proportions is also required to realize mixing of the dilution gas and the standard gas, and accurate control and measurement are required to be carried out on the actual flow of the dilution gas and the standard gas.
The method has the following problems: the present invention solves this problem primarily by providing a sampling device with dilution capability without adding additional components and costs, since the device costs are high and the system is complex and cannot be integrated into a portable test device.
Disclosure of Invention
The invention aims to provide a gas dilution sampling connector and a use method thereof, which integrate the dilution function of gas on the same equipment without adding accessories, thereby reducing the cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a gaseous dilution sampling joint, including the casing that is tubular structure, through screw thread and casing top, the protecgulum of bottom connection and hou gai, set up the air inlet on the protecgulum, set up the gas outlet on the back and cover, still including setting up inside the casing and with the sampling post of casing coaxial, encircle the filtration module that is used for forming clean air that sets up in the sampling post outside, can dismantle the first porous baffle that is used for dividing sampling gas to sampling post and filtration module that sets up in the inside upside of casing, set up the porous fiber post that is arranged in filtering tiny particle in the sampling gas on sampling post upper portion, set up at sampling post lower part and the sample gas sampling hole of being connected with porous fiber post, and set up the second porous baffle that is used for switching on sampling gas and clean air at the inside downside of casing.
Further, a coarse filtration module for filtering dust and oil particles in the sampling gas is arranged in a cavity formed by the front cover and the first porous partition plate.
Further, the rough filtration module is a sintered PP fiber filter element.
Further, a compression spring is arranged between the front cover and the first porous partition plate, and the compression spring is located in a gap formed by the rough filtration module and the inner side wall of the shell.
Further, a pressure sensor for detecting the working condition of the joint is arranged in a cavity formed by the second porous partition plate and the rear cover.
Further, the filter module comprises a first filter module filled with a mixture of potassium permanganate activated alumina column and alkaline coal activated carbon, a second filter module filled with a fine filter element made of non-woven dense paper, a third filter module filled with palladium-catalyzed alumina particles and a fourth filter module filled with high-iodine-value coconut shell activated carbon particles, which are sequentially arranged from top to bottom and are in sealing connection through an O-shaped ring.
Further, the first filter module is an annular box body, the upper end face and the lower end face of the box body are of porous structures, and the structures of the second filter module, the third filter module and the fourth filter module are the same as those of the first filter module.
Further, the housing is made of a transparent material.
Further, a transparent viewing band is arranged on the shell.
Based on the gas dilution sampling joint, the invention also provides a using method of the sampling joint, which comprises the following steps:
(1) After the sampling gas enters the shell through the air inlet, dust and oil particles in the sampling gas are filtered through the coarse filtration module, the sampling gas is divided into two parts after passing through the first porous partition plate, one part of the sampling gas flows into the filtration module, and the other part of the sampling gas flows into the sampling column;
(2) In the filtering module, after the sampling gas is subjected to multistage filtration, clean air is formed and enters a cavity formed by the second porous partition plate and the rear cover;
(3) Meanwhile, the sampling gas entering the sampling column filters out tiny particles in the porous fiber column, and finally enters a cavity formed by the second porous partition plate and the rear cover through the sampling hole of the sampling gas;
(4) In the cavity, air and sampling gas are mixed according to a certain proportion, wherein the dilution proportion is determined according to the size of a sampling hole of the sampling gas, the purpose of diluting the sampling gas is achieved, and finally the diluted sampling gas is discharged through an air outlet.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the diluting function of the gas is integrated on the sampling connector, after the sampling gas enters the sampling connector, one part of the sampling gas is purified into clean air through the filtering module, the other part of the sampling gas is discharged through the porous fiber column and the sampling hole of the sampling gas, and finally the air and the sampling gas are mixed according to a certain proportion, so that the purpose of diluting the sampling gas is achieved, and the subsequent gas detection is facilitated; the invention mainly aims at the sampling requirement in a high-concentration polluted gas environment, directly dilutes the sampling gas in a fixed proportion dilution mode, improves the convenience of use, does not need to additionally increase accessories, reduces the cost, and has simple structure and small volume.
(2) The shell is made of transparent materials, or the transparent observation belt is arranged on the shell, so that the use condition of the filter material filled in the filter module can be observed conveniently, and the filter module is convenient to maintain and replace in time.
(3) When the front cover is connected with the shell through the threads, the compression spring provided by the invention can downwards extrude the first porous partition plate to enable each filter module to be in close contact, and then the purpose of compressing and sealing the filter modules is achieved by matching the action of the O-shaped ring.
(4) The pressure sensor provided by the invention is used for detecting the gas pressure of the cavity, knowing the working condition of the joint in time and preventing the joint from being blocked.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
Fig. 2 is a schematic structural diagram of the first filter module in fig. 1.
Fig. 3 is a schematic view of the external structure of the present invention.
Wherein, the names corresponding to the reference numerals are:
1-front cover, 2-shell, 3-back cover, 4-pressure sensor, 5-hold-down spring, 6-first porous baffle, 7-filtration module, 8-O type circle, 9-air inlet, 10-second porous baffle, 11-sampling post, 12-sample gas sampling hole, 13-porous fiber post, 14-gas outlet, 15-coarse filtration module, 16-viewing zone, 71-first filtration module, 72-second filtration module, 73-third filtration module, 74-fourth filtration module.
Detailed Description
The invention will be further illustrated by the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1 to 3, the gas dilution sampling joint disclosed by the invention comprises a casing 2 in a tubular structure, a front cover 1 and a rear cover 3 which are connected with the top and the bottom of the casing 2 through threads, a gas inlet 9 arranged on the front cover 1, a gas outlet 14 arranged on the rear cover 3, a sampling column 11 arranged inside the casing 2 and coaxial with the casing 2, a filter module 7 which is arranged around the outer side of the sampling column 11 and is used for forming clean air, a first porous partition 6 which is detachably arranged on the upper side inside the casing 2 and is used for dividing the sampling gas into the sampling column 11 and the filter module 7, a porous fiber column 13 arranged on the upper part of the sampling column 11, a sampling gas sampling hole 12 which is arranged on the lower part of the sampling column 11 and is connected with the porous fiber column 13, and a second porous partition 10 which is arranged on the lower side inside the casing 2 and is used for conducting the sampling gas and the clean air.
The invention is provided with a coarse filtration module 15 in a cavity formed by the front cover 1 and the first porous partition plate 6, which is used for filtering out dust, oil and other particles in the sampled gas, and preferably, the coarse filtration module 15 is a sintered PP fiber filter element; the Kong Qianwei column 13 is used for filtering out fine particles in the sampling gas and preventing particles from entering the sampling hole 12 of the sampling gas to influence the dilution ratio of the sampling gas.
The filtering module 7 comprises a first filtering module 71 filled with a mixture of potassium permanganate activated alumina column and alkaline coal activated carbon, a second filtering module 72 filled with a fine filtering core made of non-woven dense paper, a third filtering module 73 filled with palladium catalyzed alumina particles and a fourth filtering module 74 filled with high iodine value coconut shell activated carbon particles, which are sequentially arranged from top to bottom and are connected in a sealing way through an O-shaped ring 8, wherein clean air is formed after a series of purifying treatments such as impurity removal, dechlorination and deodorization are performed on the sampling gas, and the clean air is used for diluting the sampling gas discharged by the sampling hole 12; the first filter module 71 is an annular box body, the upper end face and the lower end face of the box body are porous structures, and the structures of the second filter module 72, the third filter module 73 and the fourth filter module 74 are the same as those of the first filter module 71.
According to the invention, the compression spring 5 is arranged between the front cover 1 and the first porous partition plate 6, the compression spring 5 is positioned in a gap formed between the rough filtration module 15 and the inner side wall of the shell 2, when the front cover 1 is connected with the top of the shell 2 through threads, the first porous partition plate 6 is pressed downwards through the compression spring 5, so that each filtration module 7 is in close contact, the effect of the O-shaped ring 8 is matched, the purpose of compressing and sealing the filtration modules 7 is achieved, and when the two filtration modules are connected through the O-shaped ring 8, the inner side and the outer side of the bottom of one filtration module are respectively and correspondingly connected with the inner side and the outer side of the top of the other filtration module through the O-shaped ring 8.
Further, a pressure sensor 4 is arranged in a cavity formed by the second porous partition plate 10 and the rear cover 3 and used for detecting the gas pressure of the cavity, knowing the working condition of the joint in time and preventing the joint from being blocked.
In order to facilitate observation of the use condition of the filter material filled in the filter module 7, the shell 2 is made of transparent materials, or a transparent observation belt is arranged on the shell 2, so that the use condition of the filter material is timely known, the filter material is convenient to maintain and replace in time, and the first porous partition plate 6 is detachably connected in the shell 2, so that the filter material can be replaced by taking out the first porous partition plate 6 when the filter material is replaced, and the filter module is convenient and quick to use.
The gas dilution sampling joint is used as follows:
(1) After the sampling gas enters the shell through the air inlet, dust and oil particles in the sampling gas are filtered through the coarse filtration module, the sampling gas is divided into two parts after passing through the first porous partition plate, one part of the sampling gas flows into the filtration module, and the other part of the sampling gas flows into the sampling column;
(2) In the filtering module, after the sampling gas is subjected to multistage filtration, clean air is formed and enters a cavity formed by the second porous partition plate and the rear cover;
(3) Meanwhile, the sampling gas entering the sampling column filters out tiny particles in the porous fiber column, and finally enters a cavity formed by the second porous partition plate and the rear cover through the sampling hole of the sampling gas;
(4) In the cavity, air and sampling gas are mixed according to a certain proportion, wherein the dilution proportion is determined according to the size of a sampling hole of the sampling gas, the purpose of diluting the sampling gas is achieved, and finally the diluted sampling gas is discharged through an air outlet.
The invention mainly aims at the sampling requirement in a high-concentration polluted gas environment, directly dilutes the sampled gas in a fixed proportion dilution mode, sends the diluted gas into the detection equipment for detection, integrates the gas dilution function on the sampling joint, improves the convenience of use, does not need to additionally increase accessories, reduces the cost, and has the advantages of simple structure, small volume, high modularization degree and easy maintenance.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present invention are still consistent with the present invention, and all the technical problems to be solved are included in the scope of the present invention.
Claims (7)
1. The gas dilution sampling joint comprises a shell (2) with a tubular structure, a front cover (1) and a rear cover (3) which are connected with the top and the bottom of the shell (2) through threads, an air inlet (9) arranged on the front cover (1), an air outlet (14) arranged on the rear cover (3), and is characterized by further comprising a sampling column (11) which is arranged inside the shell (2) and is concentric with the shell (2), a filter module (7) which is arranged around the outer side of the sampling column (11) and is used for forming clean air, a first porous baffle (6) which is detachably arranged at the upper side inside the shell (2) and is used for dividing the sampling gas into the sampling column (11) and the filter module (7), a porous fiber column (13) which is arranged at the upper part of the sampling column (11) and is used for filtering fine particles in the sampling gas, a sampling gas sampling hole (12) which is arranged at the lower part of the sampling column (11) and is connected with the porous fiber column (13), and a second porous baffle (10) which is arranged at the lower side inside the shell (2) and is used for conducting the sampling gas and the clean air;
a coarse filtration module (15) for filtering dust and oil particles in the sampling gas is arranged in a cavity formed by the front cover (1) and the first porous partition plate (6);
a compression spring (5) is arranged between the front cover (1) and the first porous partition plate (6), and the compression spring (5) is positioned in a gap formed by the rough filtration module (15) and the inner side wall of the shell (2);
the filter module (7) comprises a first filter module (71) filled with a mixture of potassium permanganate activated alumina column and alkaline coal activated carbon, a second filter module (72) filled with a fine filter element made of non-woven dense paper, a third filter module (73) filled with palladium-catalyzed alumina particles and a fourth filter module (74) filled with coconut shell activated carbon particles with high iodine value, which are sequentially arranged from top to bottom and are connected through an O-shaped ring (8) in a sealing mode.
2. A gas dilution sampling joint according to claim 1, wherein the straining module (15) is a sintered PP fiber filter cartridge.
3. A gas dilution sampling joint according to claim 1, characterized in that a pressure sensor (4) for detecting the working condition of the joint is arranged in a cavity formed by the second porous partition (10) and the rear cover (3).
4. The gas dilution sampling joint according to claim 1, wherein the first filter module (71) is an annular box body, the upper end face and the lower end face of the box body are porous structures, and the structures of the second filter module (72), the third filter module (73) and the fourth filter module (74) are the same as those of the first filter module (71).
5. A gas dilution sampling adapter according to claim 4, wherein the housing (2) is made of a transparent material.
6. A gas dilution sampling adapter according to claim 4, wherein the housing (2) is provided with a transparent viewing band (16).
7. The method of using a gas dilution sampling joint according to any one of claims 1-6, comprising the steps of:
(1) After the sampling gas enters the shell through the air inlet, dust and oil particles in the sampling gas are filtered through the coarse filtration module, the sampling gas is divided into two parts after passing through the first porous partition plate, one part of the sampling gas flows into the filtration module, and the other part of the sampling gas flows into the sampling column;
(2) In the filtering module, after the sampling gas is subjected to multistage filtration, clean air is formed and enters a cavity formed by the second porous partition plate and the rear cover;
(3) Meanwhile, the sampling gas entering the sampling column filters out tiny particles in the porous fiber column, and finally enters a cavity formed by the second porous partition plate and the rear cover through the sampling hole of the sampling gas;
(4) In the cavity, air and sampling gas are mixed according to a certain proportion, wherein the dilution proportion is determined according to the size of a sampling hole of the sampling gas, the purpose of diluting the sampling gas is achieved, and finally the diluted sampling gas is discharged through an air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539134.3A CN110160855B (en) | 2019-06-20 | 2019-06-20 | Gas dilution sampling joint and method of use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539134.3A CN110160855B (en) | 2019-06-20 | 2019-06-20 | Gas dilution sampling joint and method of use |
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| Publication Number | Publication Date |
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| CN110160855A CN110160855A (en) | 2019-08-23 |
| CN110160855B true CN110160855B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910539134.3A Active CN110160855B (en) | 2019-06-20 | 2019-06-20 | Gas dilution sampling joint and method of use |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110823833B (en) * | 2019-10-25 | 2021-02-02 | 清华大学 | Mixed sampling type online monitoring device and method for CO concentration in flue gas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706780A (en) * | 2012-06-14 | 2012-10-03 | 苏州苏净仪器自控设备有限公司 | Instrument for monitoring small particulate matters in air |
| CN103471876A (en) * | 2013-09-12 | 2013-12-25 | 北京华泰泽瑞环境技术有限公司 | Dilution sampling probe |
| CN106556707A (en) * | 2015-09-28 | 2017-04-05 | 中国辐射防护研究院 | A kind of full-automatic halogen gas measurement apparatus |
| CN207231865U (en) * | 2017-08-15 | 2018-04-13 | 绵阳悠盟科技有限公司 | A kind of new dilution sampling probe |
| CN210071472U (en) * | 2019-06-20 | 2020-02-14 | 应急管理部四川消防研究所 | A gas dilution sampling connector |
-
2019
- 2019-06-20 CN CN201910539134.3A patent/CN110160855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706780A (en) * | 2012-06-14 | 2012-10-03 | 苏州苏净仪器自控设备有限公司 | Instrument for monitoring small particulate matters in air |
| CN103471876A (en) * | 2013-09-12 | 2013-12-25 | 北京华泰泽瑞环境技术有限公司 | Dilution sampling probe |
| CN106556707A (en) * | 2015-09-28 | 2017-04-05 | 中国辐射防护研究院 | A kind of full-automatic halogen gas measurement apparatus |
| CN207231865U (en) * | 2017-08-15 | 2018-04-13 | 绵阳悠盟科技有限公司 | A kind of new dilution sampling probe |
| CN210071472U (en) * | 2019-06-20 | 2020-02-14 | 应急管理部四川消防研究所 | A gas dilution sampling connector |
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| CN110160855A (en) | 2019-08-23 |
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