CN113281098A - Isotope sample collection device for inhibiting evaporation and exchange of water sample - Google Patents
Isotope sample collection device for inhibiting evaporation and exchange of water sample Download PDFInfo
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- CN113281098A CN113281098A CN202110402036.2A CN202110402036A CN113281098A CN 113281098 A CN113281098 A CN 113281098A CN 202110402036 A CN202110402036 A CN 202110402036A CN 113281098 A CN113281098 A CN 113281098A
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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
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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Abstract
The invention belongs to the technical field of isotope collection devices, and particularly relates to an isotope sample collection device for inhibiting evaporation and exchange of a water sample, which comprises a sample storage container, a funnel and a water guide pipe, wherein the sample storage container and the funnel are in sealed connection through the water guide pipe, the top end of the water guide pipe is in sealed communication with a water leakage port at the bottom of the funnel, and a floating ball is placed at the bottom of the funnel; the bottom end of the water guide pipe extends into the bottom end of the sample storage container, threads are arranged on the outer surface of the bottom end of the water guide pipe, a water outlet hole is formed above the threads, a closed sleeve is sleeved at the bottom end of the water guide pipe, and the threads formed at the bottom end inside the closed sleeve are matched and screwed with the threads at the bottom end of the water pipe; the funnel bottom still communicates with the pressure release pipe, and the pressure release pipe setting is in the floater bottom, the pressure release pipe other end and storage appearance container intercommunication. A small amount of first precipitation is stored in the water guide pipe to form a small liquid level, so that large-area water sample evaporation is avoided; the pressure relief pipe is arranged to enable all rainfall in the funnel to flow into the sample storage container.
Description
Technical Field
The invention belongs to the technical field of isotope collection devices, and particularly relates to an isotope sample collection device for inhibiting evaporation and exchange of a water sample.
Background
The previous monthly accumulated sample collection devices adopted in the atmospheric precipitation isotope monitoring have defects of different degrees although the manufacture is simpler. If the applicability of the area is not strong, the evaporation and the exchange of water samples are prevented from being incomplete, the operation is inconvenient and the like, none of the water samples is generally accepted, popularized and used.
In the existing sampling devices, an oil film closed device is inconvenient to operate for oil-water separation, and particularly a small amount of water sample is more difficult to separate; when the ball seal type sampling device is used in forest areas or areas with large wind and sand, the ball seal is often out of work due to falling of foreign matters, and the floating ball can float only when a certain amount of rainwater is exceeded, so that a small amount of retained water can not flow into the plastic barrel after each precipitation process; the retention water is partially evaporated and then brought into the container by the following rainfall; the bag-tube type sampling device prevents later rainwater from flowing into the bag or the barrel continuously due to pressure generated when the rainwater flows into the bag or the barrel in the earlier stage, so that the bag or the barrel is provided with the vent hole, and moisture in the bag or the barrel is partially evaporated once the vent hole is formed.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides an isotope sample collection device for inhibiting water sample evaporation and exchange, is suitable for various regions with different weather and different precipitation, can effectively inhibit water sample evaporation and exchange, adopts a double-barrier technology of small liquid level exposure and floating ball closure to replace the traditional oil seal type design, and avoids the difficulties of hydrogen isotope exchange between oil and water and small sample transfer.
The invention adopts the specific technical scheme that: the utility model provides an restrain isotope sample collection system of water sample evaporation and exchange, is including storing up appearance container, funnel and aqueduct, storage appearance container and funnel with the help of aqueduct sealing connection, the key is: the top end of the water guide pipe is communicated with a water leakage port at the bottom of the funnel in a sealing way, and a floating ball is placed at the bottom of the funnel; the bottom end of the water guide pipe extends into the bottom end of the sample storage container, the outer surface of the bottom end of the water guide pipe is provided with threads, a water outlet hole is formed above the threads, the bottom end of the water guide pipe is sleeved with a closed sleeve, the threads formed at the bottom end inside the closed sleeve are matched and screwed with the threads at the bottom end of the water pipe, the diameter of the upper end inside the closed sleeve is larger than that of the outer surface of the water guide pipe, and a gap between the closed sleeve and the outer surface of the water guide pipe and the;
the bottom end of the funnel is communicated with a pressure relief pipe, the pressure relief pipe is arranged at the bottom of the floating ball, and the other end of the pressure relief pipe is communicated with the sample storage container.
Preferably, the pressure relief pipe is a long pressure relief pipe, and the middle section of the pressure relief pipe is wound on the aqueduct.
Preferably, the sample storage container is hermetically connected with the water guide pipe by virtue of a first stainless steel cover, a first sealing groove is formed in the outer surface of the part, matched with the first stainless steel cover, of the water guide pipe, a first sealing ring is arranged in the first sealing groove, and the pressure relief pipe is hermetically connected with the sample storage container through the first stainless steel cover; the water guide pipe and the funnel are connected in a sealing mode through a second stainless steel cover, a second sealing groove is formed in the outer surface of the part, matched with the second stainless steel cover, of the water guide pipe, and a second sealing ring is arranged in the second sealing groove.
Preferably, a cover net is arranged in the funnel.
Preferably, a small-aperture cover net is arranged below the cover net.
Preferably, the funnel is fixedly arranged on the bracket.
The invention has the beneficial effects that: the invention relates to an improvement of a device for observing a monthly accumulated sample by an atmospheric precipitation isotope, on the basis of which, how to effectively inhibit evaporation and exchange of a water sample needs to be considered, so that the water sample in a sample storage container can not generate excessive evaporation and exchange within one month or even two months;
the sealing oil film is avoided; the joints of all the components embedded into the nitrile rubber ring are easy to disassemble and assemble, and samples are very convenient to be taken;
secondly, double measures of small liquid surface evaporation and floating ball sealing are adopted, so that more effective control on water sample evaporation is realized, and the phenomenon that the floating ball is sealed and loses effectiveness in a short time due to the invasion of foreign matters is avoided;
the unique design of the water outlet of the water guide pipe enables a small amount of rainfall to form a small liquid level, and the device is more suitable for being used in arid areas;
the small inner diameter long pressure relief pipe is designed to reduce water sample evaporation and exchange with external water vapor;
the inlet of the pressure relief pipe is led to the bottom of the floating ball, so that water vapor escape and exchange are further blocked, floating delay of the floating ball caused by residual pressure in the water storage container after precipitation is finished can be utilized, and a small amount of residual rainwater which can not float up any more can continuously flow into the water storage container.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion A of the present invention;
FIG. 3 is an enlarged view of a portion B of the present invention;
FIG. 4 is an enlarged view of a portion C of the present invention;
in the attached drawing, the sample storage container 1, the sample storage container 2, the funnel 3, the water guide pipe 4, the floating ball 5, the water outlet hole 6, the sealing sleeve 7, the pressure relief pipe 8, the first stainless steel cover 9, the first sealing ring 10, the second stainless steel cover 11, the second sealing ring 12, the cover net 13, the small-aperture cover net 14 and the support.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
the utility model provides an restrain isotope sample collection system of water sample evaporation and exchange, is including storing up appearance container 1, funnel 2 and aqueduct 3, storage appearance container 1 and funnel 2 with the help of aqueduct 3 sealing connection, the key is: the top end of the water guide pipe 3 is hermetically communicated with a water leakage port at the bottom of the funnel 2, and a floating ball 4 is placed at the bottom of the funnel 2; the bottom end of the water guide pipe 3 extends into the bottom end of the sample storage container 1, the outer surface of the bottom end of the water guide pipe 3 is provided with threads, a water outlet hole 5 is formed above the threads, the bottom end of the water guide pipe 3 is sleeved with a closed sleeve 6, the bottom end inside the closed sleeve 6 is provided with threads which are matched and screwed with the threads at the bottom end of the water pipe 3, the diameter of the upper end inside the closed sleeve 6 is larger than that of the outer surface of the water guide pipe 3, and a water outlet channel is formed by a gap between the closed sleeve 6 and the outer surface of the water guide pipe 3 and the water outlet hole 5;
the bottom end of the funnel 2 is also communicated with a pressure relief pipe 7, the pressure relief pipe 7 is arranged at the bottom of the floating ball 4, and the other end of the pressure relief pipe 7 is communicated with the sample storage container 1.
As shown in fig. 1, 2, 3 and 4, the upper end of a water conduit 3 is tightly connected with a water collecting funnel 2, the lower end of the water conduit extends into a sample storage container 1, a closed sleeve 6 is sleeved at the lower end of the water conduit 3 in a threaded manner, so that rainwater entering the water conduit 3 can overflow and flow into the sample storage container 1 only after the closed sleeve 6 is filled, namely the liquid level is higher than the highest point of the closed sleeve 6, and a small amount of primary rainfall is stored at the bottom end inside the water conduit 3 to form a small liquid level, thereby preventing a large area of water sample from evaporating;
the pressure relief pipe 7 is arranged, so that the floating ball 4 can be continuously floated for a short time by residual pressure caused by resistance to airflow after the rainfall process is finished, and all rainfall in the funnel 2 flows into the sample storage container 1;
the funnel 2 is made of stainless steel, and the caliber of the funnel is designed according to the maximum and minimum monthly rainfall in the area to ensure that the water sample does not overflow from the container, and can collect rainwater as much as possible, and not less than T, D and the minimum monthly rainfall are finished18The volume of water sample required for O (i.e. tritium, deuterium and oxygen 18) analysis.
Example 1
In 2006, the effect of preventing water sample evaporation and exchange of a newly manufactured sampling device is tested by selecting 6-7 months with hot and humid climate. 300mL of distilled water was put into a water container, 10mL of water was taken out every 5 days and put into a high density polyethylene vial with a screw cap (lining polytetrafluoroethylene pad), and delta was performed together after 50 days18And (4) analyzing. The results (table 1) show that no discernible change was found within the analytical method uncertainty (0.2 ‰), see table 1:
as shown in fig. 1, 2 and 3, the pressure relief pipe 7 is a long pressure relief pipe, and the middle section is wound around the water conduit 3.
The pressure relief pipe 7 is a long plastic pipe with a small inner diameter, the pressure relief pipe 7 is long in path, the gas path is long, and air can enter the long pressure relief pipe 7 with the small inner diameter from the water storage container 1 by utilizing the residual pressure in the water storage container 1 after the rainfall process is finished, so that the floating ball 4 is blown up to delay the continuous floating, and all rainfall in the funnel 2 flows into the sample storage container 1.
As shown in fig. 1, 2 and 3, the sample storage container 1 is hermetically connected with the water conduit 3 by means of a first stainless steel cover 8, a first sealing groove is formed in the outer surface of the part, matched with the first stainless steel cover 8, of the water conduit 3, a first sealing ring 9 is arranged in the first sealing groove, and the pressure relief pipe 7 is hermetically connected with the sample storage container 1 by means of the first stainless steel cover 8; aqueduct 3 and funnel 2 with the help of second stainless steel lid 10 sealing connection, aqueduct 3 and second stainless steel lid 10 complex partial surface set up the second seal groove, be provided with second sealing washer 11 in the second seal groove.
The first sealing ring 9 and the second sealing ring 11 are both made of nitrile rubber rings and are used for sealing connection between the sample storage container 1 and the funnel 2 and between the water guide pipes 3.
As shown in fig. 1, a cover net 12 is arranged in the funnel 2.
The cover net 12 can isolate foreign matters such as external leaves, ensures the cleanliness of collected rainwater, and is suitable for windless and sandy areas or less windy and sandy areas.
As shown in fig. 1, a small-aperture cover net 13 is arranged below the cover net 12.
The small-aperture cover net 13 can isolate finer sundries such as gravel, and the double-layer cover net is more suitable for areas with more wind and sand.
As shown in fig. 1, the funnel 2 is fixedly mounted on a support 14.
The funnel 2 is fixed by a detachable bracket 14, and is stable and not easy to be blown down by wind.
Claims (6)
1. The utility model provides an restrain isotope sample collection system of water sample evaporation and exchange, is including storing up appearance container (1), funnel (2) and aqueduct (3), storage appearance container (1) and funnel (2) with the help of aqueduct (3) sealing connection, its characterized in that: the top end of the water guide pipe (3) is communicated with a water leakage port at the bottom of the funnel (2) in a sealing way, and a floating ball (4) is placed at the bottom of the funnel (2); the bottom end of the water guide pipe (3) extends into the bottom end of the sample storage container (1), the outer surface of the bottom end of the water guide pipe (3) is provided with threads, a water outlet hole (5) is formed above the threads, the bottom end of the water guide pipe (3) is sleeved with a closed sleeve (6), the bottom end inside the closed sleeve (6) is provided with threads which are matched and screwed with the threads at the bottom end of the water guide pipe (3), the diameter of the upper end inside the closed sleeve is larger than that of the outer surface of the water guide pipe (3), and a gap between the closed sleeve (6) and the outer surface of the water guide pipe (3) and the water outlet hole (5) form a water outlet channel;
the bottom end of the funnel (2) is communicated with a pressure relief pipe (7), the pressure relief pipe (7) is arranged at the bottom of the floating ball (4), and the other end of the pressure relief pipe (7) is communicated with the sample storage container (1).
2. An isotope sample collection assembly for inhibiting evaporation and exchange of a water sample as recited in claim 1, wherein: the pressure relief pipe (7) is a long pressure relief pipe, and the middle section of the pressure relief pipe is wound on the water guide pipe (3).
3. An isotope sample collection assembly for inhibiting evaporation and exchange of a water sample as recited in claim 2, wherein: the sample storage container (1) is hermetically connected with the water guide pipe (3) by virtue of a first stainless steel cover (8), a first sealing groove is formed in the outer surface of the part, matched with the first stainless steel cover (8), of the water guide pipe (3), a first sealing ring (9) is arranged in the first sealing groove, and the pressure relief pipe (7) is hermetically connected with the sample storage container (1) by virtue of the first stainless steel cover (8); aqueduct (3) and funnel (2) with the help of second stainless steel lid (10) sealing connection, aqueduct (3) and second stainless steel lid (10) complex partial surface set up the second seal groove, be provided with second sealing washer (11) in the second seal groove.
4. An isotope sample collection assembly for inhibiting evaporation and exchange of a water sample as recited in claim 3, wherein: a cover net (12) is arranged in the funnel (2).
5. An isotope sample collection assembly for inhibiting evaporation and exchange of a water sample as recited in claim 4, wherein: a small-aperture cover net (13) is arranged below the cover net (12).
6. An isotope sample collection assembly for inhibiting evaporation and exchange of a water sample as recited in claim 1, wherein: the funnel (2) is fixedly arranged on the bracket (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402036.2A CN113281098A (en) | 2021-04-14 | 2021-04-14 | Isotope sample collection device for inhibiting evaporation and exchange of water sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402036.2A CN113281098A (en) | 2021-04-14 | 2021-04-14 | Isotope sample collection device for inhibiting evaporation and exchange of water sample |
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| CN113281098A true CN113281098A (en) | 2021-08-20 |
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| CN202110402036.2A Pending CN113281098A (en) | 2021-04-14 | 2021-04-14 | Isotope sample collection device for inhibiting evaporation and exchange of water sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279103A (en) * | 2022-01-07 | 2022-04-05 | 海南大学 | Automatic rainwater collector |
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2021
- 2021-04-14 CN CN202110402036.2A patent/CN113281098A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279103A (en) * | 2022-01-07 | 2022-04-05 | 海南大学 | Automatic rainwater collector |
| CN114279103B (en) * | 2022-01-07 | 2022-10-28 | 海南大学 | Automatic rainwater collector |
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