CN108519255B - Detection method for collecting radon concentration in soil - Google Patents
Detection method for collecting radon concentration in soil Download PDFInfo
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- CN108519255B CN108519255B CN201810325678.5A CN201810325678A CN108519255B CN 108519255 B CN108519255 B CN 108519255B CN 201810325678 A CN201810325678 A CN 201810325678A CN 108519255 B CN108519255 B CN 108519255B
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2294—Sampling soil gases or the like
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/02—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids
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- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- High Energy & Nuclear Physics (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
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- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention provides a detection method for collecting radon concentration in soil, which comprises the following steps of ① selecting sampling points, arranging a plurality of sampling points on the soil to be detected, wherein the sampling points are arranged in a grid shape, punching a sampling hole ②, punching the sampling hole into the soil through a punching mechanism, ③ placing an active carbon sampler and burying the sampling hole, ④ recording test data, taking out the active carbon sampler after being placed in the soil for a period of time and placing the active carbon sampler into a radon detector for measurement, and ⑤ analyzing and processing the test data.
Description
Technical Field
The invention relates to the field of nuclear radiation detection, in particular to a detection method for collecting radon concentration in soil.
Background
Generally, natural radioactive substances are difficult to enter human bodies, but radon gas which runs into air from rock soil and soil easily enters lungs along with the breathing of human bodies and moves to the whole body along with the flowing of blood to destroy cell and molecular structures, so that the radon gas is harmful to human bodies.
The measurement method mainly comprises an instantaneous sampling measurement method, a continuous sampling measurement method and an accumulative sampling measurement method, wherein the accumulative sampling measurement method is commonly used for measuring the radon concentration in soil, and the active carbon measurement method is a commonly used accumulative sampling measurement method for measuring the radon concentration in soil. Adopt the drill rod to beat the sampling hole toward soil in the current testing process, then extract the drill rod and put into the sampling hole with the active carbon sample thief, if this in-process does not have in time when inserting the active carbon sample thief into the sampling hole after the drill rod is extracted, because the sampling hole has certain degree of depth and diameter, leads to in some radon gas loss in the sampling hole to the air, therefore causes the radon gas that the extraction was collected to reduce, influences the accuracy of testing result. A sample thief that soil radon detector that chinese novel patent 201420788092.X provided unites two into one drill bit and sampling rod, shortens the time of placing the sample thief, avoids the radon gas loss, has improved detection efficiency. However, this method is suitable for instantaneous sampling measurement, and is not suitable for accumulative sampling measurement requiring a long-term placement of an activated carbon sampler.
In view of the above problems, the applicant has made an intensive study on the above drawbacks in the prior art, and has devised the present application.
Disclosure of Invention
The invention aims to provide a detection method for collecting radon concentration in soil, which effectively reduces the escape of radon gas in the soil from a sampling hole and improves the accuracy of a detection result.
The invention is realized by the following steps:
a detection method for collecting radon concentration in soil is provided, wherein the detection method comprises the following steps:
①, selecting sampling points, namely arranging a plurality of sampling points on the soil to be detected, wherein the sampling points are arranged in a grid shape;
② punching a sampling hole in soil by a punching mechanism, wherein the punching mechanism comprises a drill steel, a shell and a soil container for storing soil, the inner surface and the outer surface of the shell are respectively provided with a first internal thread and a first external thread, the lower part of the drill steel is provided with a tip, the outer surface of the drill steel is provided with a second external thread matched with the first internal thread, the middle part of the soil container is provided with a through hole extending along the up-down direction, the inner surface of the through hole is provided with a second internal thread matched with the first external thread, the inner surface of the through hole is provided with a soil leakage port extending along the left-right direction, the drill steel and the soil container are respectively and spirally connected with the inner surface and the outer surface of the shell, the horizontal height of the upper end of the shell is higher than that of the soil leakage port, the horizontal height of the drill steel is higher than that of the upper end of the shell, the upper end of the drill steel is hinged with the lower ends of two arc baffles to form a punching hole, the tip of the drill steel is attached to the two arc baffles, the tip passes through the punching hole downwards, then the tip is inserted into the soil container, and the soil container is punched in the soil;
③ placing activated carbon sampler and burying sampling hole, wherein the drill steel is upwards screwed to separate from the shell, the activated carbon sampler is then placed in the shell, the shell is upwards rotated relative to the soil container, the arc baffle of the shell is downwards rotated by the activated carbon sampler and ascends along with the body of the shell, soil begins to leak from the soil leakage opening when the shell rotates to the soil leakage opening of the soil container, and the shell is directly drawn out after completely separating from the soil container;
④ recording the test data, placing the activated carbon sampler in the soil for a period of time, taking out and placing the activated carbon sampler in a radon detector for measurement;
⑤ the test data is analyzed.
The measurement result is influenced by the condition of pore forming, and preferably, the diameter of the sampling hole is 0.02 m-0.04 m, the depth of the sampling hole is 0.6 m-0.8 m, and the sampling hole is proper in size, so that the sampling of the activated carbon sampler is facilitated, and the consistency of the activated carbon sampler is maintained.
In order to ensure that the activated carbon can sufficiently adsorb radon gas, the activated carbon sampler is preferably placed in the soil for at least five days.
After the technical scheme is adopted, the invention relates to a detection method for collecting radon concentration in soil, and compared with the prior art, the detection method has the advantages that the punching mechanism is matched with an active carbon sampler, the steps of punching a sampling hole and filling the sampling hole are optimized, the exposure area of the sampling hole is reduced, the exposure time of the sampling hole is shortened, radon gas in soil is effectively prevented from escaping from the sampling hole, and the accuracy of a detection result is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the drill steel extending into the housing;
FIG. 3 is a side view of the drill steel being removed from the housing.
Description of reference numerals:
1. a steel chisel 11, a second external thread 12 and a sharp head; 2. the device comprises a shell, 21, a first internal thread, 22, a first external thread, 23, a body, 24, an arc-shaped baffle, 25 and a punching hole; 3. the soil container 31, a second internal thread 32 and a soil leakage opening; 4. an active carbon sampler.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1-3, the present invention provides a detection method for collecting radon concentration in soil, wherein the method comprises the following steps:
①, taking sampling points, namely arranging a plurality of sampling points on the soil to be measured, wherein the sampling points are arranged in a grid shape, and the point arrangement position should cover the soil to be measured as much as possible, so that the measurement is more accurate and comprehensive.
② A sampling hole is punched into soil by a punching mechanism which comprises a drill rod 1, a shell 2 and a soil container 3 for storing soil, wherein the inner surface and the outer surface of the shell 2 are respectively provided with a first internal thread 21 and a first external thread 22, the lower part of the drill rod 1 is provided with a pointed end 12, the outer surface of the drill rod 1 is provided with a second external thread 11 matched with the first internal thread 21, the middle part of the soil container 3 is provided with a through hole extending along the up-down direction, the inner surface of the through hole is provided with a second internal thread 31 matched with the first external thread 22, the inner surface of the through hole is provided with a soil leakage port 32 extending along the left-right direction, the drill rod 1 and the soil container 3 are respectively screwed on the inner surface and the outer surface of the shell 2, specifically, the drill rod 1 penetrates through the shell 2 to be screwed with the shell 2, the through hole of the soil container 3 is screwed outside the shell 2, the horizontal height of the upper end of the shell 2 is higher than the horizontal height of the soil leakage port 32, the horizontal height of the upper end of the shell 2 is higher than the horizontal height of the upper end of the shell 2, and the horizontal height of the upper end of the drill rod can be directly lifted up by the hammer, and the hammer of the shell 2.
This shell 2 includes body 23 and two cowl 24, the lower extreme at body 23 is articulated to the upper end of these two cowl 24, the lower extreme of two cowl 24 encloses into dozen drill way 25, as shown in fig. 2 and 3, two cowl 24 enclose into the structure of a similar round platform, the tip 12 of this drill rod 1 is laminated with two cowl 24 and the pointed end of tip 12 passes beat drill way 25 and expose downwards, the pointed end of tip 12 pricks soil downwards, that is to say, most sharp-pointed tip can direct contact soil through the drill way, performance sharp-pointed characteristics are in order to do benefit to quick punching, and there is the fender power of drill rod, the arc blocks the board and can not upwards rotate, then strike the upper end of drill rod 1 with the hammer, drill rod 1 and shell 2 are absorbed in soil simultaneously in order to form the sampling hole, and will beat soil dress in holding ware 3 for subsequent use.
③ placing an activated carbon sampler and burying the sampling hole 4, firstly, the drill rod 1 is screwed upwards to be separated from the shell 2, at this time, the exposed soil area is only as large as the area of the punching hole 25, and other parts of the sampling hole are shielded by the shell 2 and can not be exposed, thereby greatly reducing the exposed area of the soil and further reducing the escape of radon gas in the sampling hole, then the activated carbon sampler 4 is put into the shell 2, then the shell 2 is rotated upwards relative to the soil container 3, the arc-shaped baffle 24 of the shell 2 is resisted by the activated carbon sampler 4 to rotate downwards in the slow-rising process and then ascends along with the body 23 of the shell 2, when the shell 2 rotates to the soil leakage port 32 of the soil container 3, the soil begins to leak from the soil leakage port 32 and covers the activated carbon sampler 4, which is equivalent to the start of filling the sampling hole, when the shell 2 is completely separated from the soil container 3, the sampling hole formed by the shell 2 is also filled with the soil, then the soil container 3 is directly extracted, in the actual operation, the soil container 3 is not completely extracted, even the sampling hole is in the whole soil, the soil is not occupied by the radon gas, and the sampling hole is greatly reduced, thereby greatly reducing the escape of the soil.
④ recording the test data, taking out the activated carbon sampler 4 after being placed in the soil for a period of time and placing the activated carbon sampler 4 into a radon detector for measurement;
⑤ the test data is analyzed.
How the hole forming situation affects the measurement result, and in order to ensure that the sampling hole process is sequential and proper in size, the diameter of the sampling hole is preferably 0.02 m-0.04 m, and the depth of the sampling hole is preferably 0.6 m-0.8 m. Is beneficial to taking and placing the active carbon sampler 4.
More preferably, to ensure that the activated carbon sampler 4 sufficiently adsorbs radon gas, the activated carbon sampler 4 is placed in the soil for at least five days.
In conclusion, the punching mechanism is matched with the activated carbon sampler, the steps of punching the sampling hole, placing the activated carbon sampler and burying the sampling hole are optimized, the exposure area of the sampling hole is greatly reduced and the exposure time of the sampling hole is shortened in the whole sampling process, and radon gas in soil is effectively prevented from escaping from the sampling hole, so that the radon concentration detection precision is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. A detection method for collecting radon concentration in soil is characterized by comprising the following steps:
①, selecting sampling points, namely arranging a plurality of sampling points on the soil to be detected, wherein the sampling points are arranged in a grid shape;
② punching a sampling hole in soil by a punching mechanism, the punching mechanism comprises a drill steel, a shell and a soil container for storing soil, the inner surface and the outer surface of the shell are respectively provided with a first internal thread and a first external thread, the lower part of the drill steel is provided with a tip, the outer surface of the drill steel is provided with a second external thread matched with the first internal thread, the middle part of the soil container is provided with a through hole extending along the up-down direction, the inner surface of the through hole is provided with a second internal thread matched with the first external thread, the inner surface of the through hole is provided with a soil leakage port extending along the left-right direction, the drill steel and the soil container are respectively and spirally connected with the inner surface and the outer surface of the shell, the horizontal height of the upper end of the shell is higher than that of the soil leakage port, the horizontal height of the drill steel is higher than that of the upper end of the shell, the shell comprises a body and two arc baffles, the upper ends of the two arc baffles are hinged with the lower ends of the body, the lower ends of the two arc baffles form an orifice, the tip of the drill steel is stuck with the two arc baffles, the tip passes through the punching port and then is hit into the soil container, the soil container is formed by punching mechanism, and the tip and the soil container;
③ placing activated carbon sampler and burying sampling hole, wherein the drill steel is upwards screwed to separate from the shell, the activated carbon sampler is then placed in the shell, the shell is upwards rotated relative to the soil container, the arc baffle of the shell is downwards rotated by the activated carbon sampler and ascends along with the body of the shell, soil begins to leak from the soil leakage opening when the shell rotates to the soil leakage opening of the soil container, and the shell is directly drawn out after completely separating from the soil container;
④ recording the test data, placing the activated carbon sampler in the soil for a period of time, taking out and placing the activated carbon sampler in a radon detector for measurement;
⑤ the test data is analyzed.
2. The detection method for collecting the radon concentration in soil as claimed in claim 1, wherein the diameter of said sampling hole is 0.02 m-0.04 m, and the depth of said sampling hole is 0.6 m-0.8 m.
3. The method of claim 1, wherein the activated carbon sampler is placed in the soil for at least five days.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810325678.5A CN108519255B (en) | 2018-04-12 | 2018-04-12 | Detection method for collecting radon concentration in soil |
| CN202010489555.2A CN111562147B (en) | 2018-04-12 | 2018-04-12 | Soil radon concentration detection device capable of improving detection accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810325678.5A CN108519255B (en) | 2018-04-12 | 2018-04-12 | Detection method for collecting radon concentration in soil |
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| CN202010489555.2A Division CN111562147B (en) | 2018-04-12 | 2018-04-12 | Soil radon concentration detection device capable of improving detection accuracy |
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| Publication Number | Publication Date |
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| CN108519255A CN108519255A (en) | 2018-09-11 |
| CN108519255B true CN108519255B (en) | 2020-07-17 |
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| CN202010489555.2A Active CN111562147B (en) | 2018-04-12 | 2018-04-12 | Soil radon concentration detection device capable of improving detection accuracy |
| CN201810325678.5A Active CN108519255B (en) | 2018-04-12 | 2018-04-12 | Detection method for collecting radon concentration in soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111141892B (en) * | 2020-03-06 | 2022-06-14 | 福建日新检测技术服务有限公司 | Soil radon concentration detection device for environment detection |
| CN112098625B (en) * | 2020-09-05 | 2022-10-25 | 宁波弘宇检测有限公司 | Radon gas detection method |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4880973A (en) * | 1988-07-15 | 1989-11-14 | Reynolds John D | Ground radon flux sampling device |
| US5744730A (en) * | 1997-02-14 | 1998-04-28 | Ballard; John H. | Subsurface in-situ radon gas detection/penetrometer system |
| CN201016878Y (en) * | 2006-10-30 | 2008-02-06 | 核工业北京地质研究院 | Soil radon trap sampling apparatus |
| CN201935837U (en) * | 2010-12-23 | 2011-08-17 | 核工业北京地质研究院 | Activated carbon absorber for collecting radon gas in soil |
| CN202661301U (en) * | 2012-04-13 | 2013-01-09 | 太原理工大学 | All-weather underground radon gas sampling device |
| CN203132886U (en) * | 2012-12-31 | 2013-08-14 | 中国人民解放军63653部队 | Double-filter membrane active carbon box used for sampling Rn-Tn and daughter of Rn-Tn |
| CN104213558B (en) * | 2014-08-26 | 2016-01-27 | 浙江冶民园林工程有限公司 | Mechanical punching stake |
| CN204331045U (en) * | 2014-12-15 | 2015-05-13 | 河南众信质量检验技术研究有限公司 | A kind of sampler of Soil Radon detector |
| CN104677695B (en) * | 2015-02-10 | 2017-04-19 | 福建拓普检测技术有限公司 | Improved portable sampler |
| CN204462401U (en) * | 2015-03-09 | 2015-07-08 | 新奥气化采煤有限公司 | A kind of survey radon sampler |
| CN106932812A (en) * | 2015-12-30 | 2017-07-07 | 核工业北京地质研究院 | A kind of precession hole drilling type active charcoal bag gamma-ray spectrometry surveys radon method |
| CN106018004B (en) * | 2016-06-24 | 2018-09-28 | 北京市环境保护科学研究院 | A kind of passive type soil gas acquisition method |
| CN205919996U (en) * | 2016-08-22 | 2017-02-01 | 中国地震局第一监测中心 | Novel fault gas special drill rod that punches |
| CN106370474B (en) * | 2016-08-26 | 2018-10-12 | 环境保护部南京环境科学研究所 | Flow sampling apparatus and its method of sampling in soil |
| CN106769247A (en) * | 2016-12-23 | 2017-05-31 | 山东科技大学 | A kind of surface geochemical exploration adsorption filament is implanted into retracting device and application method |
| CN106873025A (en) * | 2017-04-10 | 2017-06-20 | 福建师范大学 | A kind of radon harvester and method |
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2018
- 2018-04-12 CN CN202010489555.2A patent/CN111562147B/en active Active
- 2018-04-12 CN CN201810325678.5A patent/CN108519255B/en active Active
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| CN108519255A (en) | 2018-09-11 |
| CN111562147B (en) | 2022-08-05 |
| CN111562147A (en) | 2020-08-21 |
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