CN209992239U - Sample collecting device for determining apparent age of seawater by utilizing radioactive krypton isotope - Google Patents
Sample collecting device for determining apparent age of seawater by utilizing radioactive krypton isotope Download PDFInfo
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- CN209992239U CN209992239U CN201920799142.7U CN201920799142U CN209992239U CN 209992239 U CN209992239 U CN 209992239U CN 201920799142 U CN201920799142 U CN 201920799142U CN 209992239 U CN209992239 U CN 209992239U
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Abstract
The utility model relates to a sample collection device for determining sea water apparent age by utilizing radioactive krypton isotope, wherein one interface of a tee joint is connected with a liquefied gas tank through a connecting pipeline A, a direct reading barometer is arranged on the connecting pipeline A, the other two interfaces of the tee joint are respectively connected with a vacuum pump and a nitrogen bottle through a connecting pipeline B and a connecting pipeline C, three interfaces are respectively provided with a three-way valve switch, the vacuum pump vacuumizes the liquefied gas tank before sampling, and then the liquefied gas tank before sampling is filled with nitrogen through the nitrogen bottle; when the liquefied gas tank is used for sampling, the vacuum pump is used for vacuumizing, and then the liquefied gas tank is connected with the myriameter warm salt deep water sampler through the connecting pipeline D, so that seawater in a water sampling bottle on the myriameter warm salt deep water sampler is sucked into the liquefied gas tank. The utility model adopts the circulating air pumping and charging mode to reduce the air residue in the system as much as possible, and provides a good blank for the closed collection of seawater samples; the sampling is carried out by adopting a mode of sucking a seawater sample in vacuum, so that the seawater sample is prevented from being polluted by the atmosphere.
Description
Technical Field
The utility model belongs to the ocean equipment field, specifically speaking are sample collection system who utilizes radioactive krypton (krypton-81 and krypton-85) isotope survey sea water apparent age.
Background
The radioactive inert gas element is very suitable for corresponding tracing monitoring and age determination due to the special chemical stability of the inert gas element, and has the advantages that the inert gas element is dissolved in the ocean in a small amount, is mainly distributed in the atmosphere and is not polluted by geological environment. The age of water samples in different periods can be determined by using two nuclides of krypton-81 (half-life period of 23 ten thousand years) and krypton-85 (half-life period of 10.76 years). At present, international scientists have successfully isolated air by using krypton-81 and krypton-85 through vacuum atomization of a submersible pump to determine the age of shallow surface water; for determining the apparent age of deep ocean water, devices capable of effectively isolating air to collect deep seawater samples are still lacking.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an utilize sample collection system of radioactive krypton isotope determination sea water apparent age. The sample collection device isolates air to collect deep seawater, solves the problem that deep seawater samples are easy to be contaminated by air in the acquisition and transfer processes, and avoids the change of gas components and concentration in the process of analyzing the deep seawater in a laboratory. The utility model discloses be favorable to scientific research personnel to accurately analyze deep sea water's krypton-81 and krypton-85 concentration, establish the basis for surveying deep sea water apparent age.
The purpose of the utility model is realized through the following technical scheme:
the utility model discloses a ten thousand meters deep water sampler of warm salt, liquefied gas jar, vacuum pump, nitrogen cylinder, direct reading barometer, three way valve switch and tee bend, wherein a tee bend interface through connecting line A with the liquefied gas jar links to each other, be equipped with the direct reading barometer that detects the gas pressure situation in the liquefied gas jar on this connecting line A, tee bend second interface through connecting line B with the vacuum pump links to each other, tee bend third interface through connecting line C with the nitrogen cylinder links to each other, install three way valve switch on this tee bend three interface respectively, the vacuum pump is to the liquefied gas jar evacuation before the sampling, rethread the nitrogen cylinder fills nitrogen gas to the liquefied gas jar before the sampling; the liquid gas storage tank is vacuumized by a vacuum pump during sampling, and then is connected with the myriameter warm salt deep water sampler through a connecting pipeline D, and seawater in a water sampling bottle on the myriameter warm salt deep water sampler is sucked into the liquid gas storage tank;
wherein: a pressure reducing valve is arranged at the air outlet of the nitrogen cylinder and is connected with a third interface of the tee joint through a connecting pipeline C; or the connecting pipeline C is provided with a pressure reducing valve which is positioned between a three-way valve switch on a third interface of the three-way valve and the gas outlet of the nitrogen gas cylinder;
the connecting pipeline A comprises a stainless steel pipe and a polytetrafluoroethylene pipe which are connected with each other, and the direct-reading barometer is arranged on the stainless steel pipe;
and the connecting pipeline B, the connecting pipeline C and the connecting pipeline D are all polytetrafluoroethylene pipes.
The utility model discloses an advantage does with positive effect:
1. the utility model discloses simple structure does not have harsh requirement to service environment, is fit for carrying out the on-the-spot collection of deep sea water sample on the ship.
2. The utility model discloses a circulation is bled and the mode of aerifing, reduces the remaining of air in the system, provides good blank for airtight collection sea water sample.
3. The utility model discloses a mode of vacuum suction sea water sample is sampled, has avoided the atmosphere to stain sea water sample.
4. The utility model discloses effectively solved deep sea water sample and easily received the problem that the air stains at the in-process that acquires and shift, guaranteed that radioactivity krypton-85 and krypton-81 concentration in the deep sea water sample remain unanimous basically with its concentration under deep sea normal position state in laboratory analysis process, provide the powerful guarantee for krypton-81 and krypton-85 in the realization utilization seawater determine the apparent age of sea water and confirm the velocity of flow, the flow direction of deep ocean current.
Drawings
FIG. 1 is a schematic structural view of the pretreatment of the sample tank of the present invention;
FIG. 2 is a schematic structural view of the seawater sample collected on site according to the present invention;
FIG. 3 is a graph showing the change of measured Krypton-85 radioactivity per minute with the depth of seawater according to the present invention;
wherein: the device comprises a ten-thousand-meter-temperature salt deep water sampler 1, a polyvinyl fluoride tube 2, a liquefied gas tank 3, a vacuum pump 4, a nitrogen gas bottle 5, a direct-reading barometer 6, a stainless steel tube 7, a three-way valve 8, a three-way valve 9, a pressure reducing valve 10 and an electronic scale 11.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model comprises a myriameter-temperature salt deep water sampler 1, a liquefied gas tank 3, a vacuum pump 4, a nitrogen gas bottle 5, a direct reading barometer 6, a three-way valve switch 8 and a three-way valve 9, wherein one interface of the three-way valve 9 is connected with the liquefied gas tank 3 through a connecting pipeline A, and the connecting pipeline A is provided with the direct reading barometer 6 for detecting the gas pressure condition in the liquefied gas tank 3; the second interface of the tee joint 9 is connected with a vacuum pump 4 through a connecting pipeline B, and the vacuum pump 4 can pump out the gas in the liquefied gas tank 3; the third interface of the tee joint 9 is connected with a nitrogen cylinder 5 through a connecting pipeline C, and the nitrogen cylinder 5 provides nitrogen for the liquefied gas tank 3. Three ports of the tee joint 9 are respectively provided with a three-way valve switch 8, and the liquefied gas tank 3 is ensured to be pumped into absolute vacuum by changing the closing of the three-way valve switches 8, so that preparation is made for connecting the myriameter-temperature salt deep water sampler 1 to carry out closed water sampling.
A pressure reducing valve 10 is arranged at the air outlet of the nitrogen cylinder 5, and the pressure reducing valve 10 is connected with a third interface of the tee joint 9 through a connecting pipeline C; or, a pressure reducing valve 10 is arranged on the connecting pipeline C, and the pressure reducing valve 10 is positioned between a three-way valve switch 8 on a third interface of the three-way valve 9 and the air outlet of the nitrogen gas cylinder 5. In this embodiment, a pressure reducing valve 10 is provided at the gas outlet of the nitrogen gas cylinder 5.
The connecting pipeline a of this embodiment includes a stainless steel pipe 7 and a teflon pipe 2 connected to each other, and the direct reading barometer 6 is disposed on the stainless steel pipe 7. The connecting pipeline B, the connecting pipeline C and the connecting pipeline D of this embodiment are all polytetrafluoroethylene pipes 2.
The utility model provides a ten thousand meters warm salt deep water sampler 1 is the market purchase product, purchases in US SBEBIRD GONGSI company, and the model is SBE 911. The myriameter warm salt deep water sampler 1 is provided with 24 bottles of 10L water sampling bottles, the 24 bottles of 10L water sampling bottles surround the periphery of a warm salt deep sensor of the myriameter warm salt deep water sampler 1 according to numbers 1-24 respectively, and seawater samples of water layers with different depths are collected in a deep sea in-situ bottle closing mode based on an electromagnetic principle. The water collection of 24 bottles of 10L water collection bottles of the myriameter-temperature salt deep water collector 1 only collects middle-layer water, so that sample contamination caused by the exchange of upper-layer water and air after an air valve of the water collection bottle is opened is avoided. The utility model discloses direct reading barometer 6 among the sample collection device is prior art, and direct reading barometer 6 that sets up on nonrust steel pipe 7 under a standard atmospheric pressure, direct reading barometer 6's reading is zero, and the gas pressure that can detect liquefied gas jar 3 in real time through direct reading barometer 6's reading changes. The water outlet of the myriameter-temperature salt deep water sampler 1 is connected with the water inlet of a liquefied gas tank 3 through a polytetrafluoroethylene pipe 2 and is used for collecting deep seawater in a sealed mode. The liquefied gas tank 3 is placed on the electronic scale 11 and used for monitoring the weight of the collected water sample in real time. All joints are fixedly locked by adopting sealing rings and buckles, and the air tightness of the pipeline is ensured.
The utility model discloses an acquisition method does:
preparation work before sampling: vacuumizing the liquefied gas tank 3 by using the vacuum pump 4, and then filling nitrogen into the liquefied gas tank 3 by using a nitrogen bottle 5 to keep the pressure in the liquefied gas tank 3 positive;
sampling on site: the nitrogen in the liquefied gas tank 3 is pumped out to the liquefied gas tank 3 by the vacuum pump 4 to be vacuumized, the liquefied gas tank 3 which is vacuumized is connected with the water outlet of the myriameter-temperature salt deep water sampler 1 through the connecting pipeline D, and the seawater in the water sampling bottle of the myriameter-temperature salt deep water sampler 1 is sucked into the liquefied gas tank 3 to realize sampling. The method specifically comprises the following steps:
preparation work before sampling:
the liquefied gas tank 3 (sample tank) is connected to a first interface of a tee joint 9 through a stainless steel pipe 7 and a polytetrafluoroethylene pipe 2, and a direct reading barometer 6 is attached to the stainless steel pipe 7 and used for detecting the gas pressure condition in the liquefied gas tank 3; the vacuum pump 4 and the nitrogen gas bottle 5 are respectively connected with a second interface and a third interface of a tee joint 9 through a polytetrafluoroethylene tube 2, and three interfaces of the tee joint 9 are respectively provided with a tee valve switch 8. In the initial state, three-way valve switches 8 on three interfaces of the three-way valve 9 are all in a closed state.
When the vacuum pump 4 is used for vacuumizing the liquefied gas tank 3, the three-way valve switch 8 on the first interface connected with the liquefied gas tank 3 and the three-way valve switch 8 on the second interface connected with the vacuum pump 4 are opened, the direct reading barometer 6 is plugged into a power supply, all connecting parts of a pipeline are screwed, the vacuum pump 4 is opened, air in the liquefied gas tank 3 is extracted, and when the reading number of the direct reading barometer 6 shows a set value (98 kpa in the embodiment) lower than 0, the three-way valve switch 8 on the second interface connected with the vacuum pump 4 is closed; then, pull out the one end that connecting line C and tee bend 9 are connected, open the relief pressure valve 10 of 5 gas outlets of nitrogen cylinder, the air current that produces at least one atmospheric pressure (this embodiment is 1 ~ 2 atmospheric pressures) fills in behind connecting line C, be connected connecting line C and tee bend 9 again, open the three-way valve switch 8 on the third interface of tee bend 9, be full of nitrogen gas in making liquefied gas jar 3, when the reading of direct reading barometer 6 shows to be greater than 0, close the three-way valve switch 8 on the third interface of tee bend 9, accomplish the process that a liquefied gas jar 3 takes out the vacuum and fills nitrogen gas. And then repeating the process of vacuumizing and filling nitrogen, opening a three-way valve switch 8 on a second interface connected with the vacuum pump 4, opening the vacuum pump 4 to continuously vacuumize the liquefied gas tank 3 until the reading of the direct-reading barometer 6 shows-98 kpa, closing the three-way valve switch 8 on the second interface, opening the three-way valve switch 8 on a third interface connected with the nitrogen gas bottle 5, opening a pressure reducing valve 10, generating 1-2 atmospheric pressure air flows to fill nitrogen into the liquefied gas tank 3, and stopping filling the nitrogen until the reading of the direct-reading barometer 6 is greater than 0. The process of filling nitrogen gas in 3 evacuation of liquefied gas jar circulates twice at least, closes gas outlet on 3 liquefied gas jars through screwing up the knob, guarantees 3 keeping malleation of liquefied gas jar.
In the field sampling stage:
and pumping the nitrogen in the liquefied gas tank 3 into vacuum through a vacuum pump 4, and then screwing a switch to prepare for closed water collection on the deck site. Opening an air valve at the upper end of the myriameter-temperature salt deep water sampler 1, connecting one end of a connecting pipeline D with a water outlet of a numbered water sampling bottle in the myriameter-temperature salt deep water sampler 1, discharging bubbles adhered to the pipe wall of the connecting pipeline D in a turbulent flow mode by continuously pressing a port at the other end through a thumb, then transitionally connecting the other end of the connecting pipeline D to a nut at a water inlet of a liquefied gas tank 3 through a threaded inner pipe, opening a knob of the liquefied gas tank 3, and sucking seawater of the water sampling bottle into the liquefied gas tank 3; the volume of the seawater in the liquefied gas tank 3 is measured through the reading of the electronic scale 11, when the water quantity in the water sampling bottle with the serial number is remained for 2-3 liters, the knob of the liquefied gas tank 3 is closed, the water sampling of the water sampling bottle with the serial number is stopped, the same method is adopted to carry out the water sampling of the water sampling bottle with the next serial number on the same water layer, and the collection of the seawater sample on the water layer is completed until the volume of the seawater in the liquefied gas tank 3 accounts for two thirds of the volume of the liquefied gas tank 3.
The utility model discloses at laboratory test result's verification:
in order to verify the feasibility of the utility model, the applicant passes through the utility model on the spot with the comprehensive survey ship of science number, the laboratory measurement result of the collected seawater samples has the sampling time of 21 points to 23 points in 11 months in 2016, the longitude of the standing position is 139 degrees, the latitude is 11.35 degrees, the sampling levels are respectively 100m, 200m, 300m, 400m, 500m and 1000m, and each layer is sampled by 18L (the volume of the sample tank is 24L); FIG. 3 is a graph of the change in Krypton-85 radioactivity per minute versus seawater depth on the abscissa for Krypton-85 radioactivity per minute and on the ordinate for seawater depth; it can be seen that the number of nuclei decayed per minute by Kr-85 shows a decreasing trend with increasing depth, the dotted line on the right side is the number of nuclei decayed per minute by Kr-85 in modern atmosphere, and the standard deviation measured by sampling six water layers is controlled within 10%. As shown in FIG. 3, the number of nuclei decayed per minute by Kr-85 is nearly zero at a depth of 1000m, demonstrating that seawater at this depth is unaffected by modern atmospheric air, and apparent ages at different depths of seawater can be resolved by the half-life of Kr-85.
Claims (4)
1. A sample collection device for determining apparent age of seawater by utilizing radioactive krypton isotopes is characterized in that: comprises a myriameter warm salt deep water sampler (1), a liquefied gas tank (3), a vacuum pump (4), a nitrogen cylinder (5), a direct reading barometer (6), a three-way valve switch (8) and a three-way valve (9), wherein one interface of the tee joint (9) is connected with the liquefied gas tank (3) through a connecting pipeline A, the connecting pipeline A is provided with a direct reading barometer (6) for detecting the gas pressure condition in the liquefied gas tank (3), the second interface of the tee joint (9) is connected with the vacuum pump (4) through a connecting pipeline B, the third interface of the tee joint (9) is connected with the nitrogen cylinder (5) through a connecting pipeline C, three ports of the tee joint (9) are respectively provided with a tee valve switch (8), the vacuum pump (4) is used for vacuumizing the liquefied gas tank (3) before sampling, and then the nitrogen bottle (5) is used for filling nitrogen into the liquefied gas tank (3) before sampling; the liquid gas storage tank (3) is vacuumized by the vacuum pump (4) during sampling, and then is connected with the myriameter warm salt deep water sampler (1) through the connecting pipeline D, so that seawater in a water sampling bottle on the myriameter warm salt deep water sampler (1) is sucked into the liquid gas storage tank (3).
2. The sample collection device for measuring the apparent age of seawater using a radioactive krypton isotope according to claim 1, characterized in that: a pressure reducing valve (10) is arranged at an air outlet of the nitrogen cylinder (5), and the pressure reducing valve (10) is connected with a third interface of the tee joint (9) through a connecting pipeline C; or a pressure reducing valve (10) is arranged on the connecting pipeline C, and the pressure reducing valve (10) is positioned between a three-way valve switch (8) on a third interface of the three-way valve (9) and the air outlet of the nitrogen cylinder (5).
3. The sample collection device for measuring the apparent age of seawater using a radioactive krypton isotope according to claim 1, characterized in that: the connecting pipeline A comprises a stainless steel pipe (7) and a polytetrafluoroethylene pipe (2) which are connected with each other, and the direct-reading barometer (6) is arranged on the stainless steel pipe (7).
4. The sample collection device for measuring the apparent age of seawater using a radioactive krypton isotope according to claim 1, characterized in that: and the connecting pipeline B, the connecting pipeline C and the connecting pipeline D are all polytetrafluoroethylene pipes (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920799142.7U CN209992239U (en) | 2019-05-30 | 2019-05-30 | Sample collecting device for determining apparent age of seawater by utilizing radioactive krypton isotope |
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| CN201920799142.7U CN209992239U (en) | 2019-05-30 | 2019-05-30 | Sample collecting device for determining apparent age of seawater by utilizing radioactive krypton isotope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095318A (en) * | 2019-05-30 | 2019-08-06 | 中国科学院海洋研究所 | Utilize the sample collecting apparatus and acquisition method of radioactive krypton isotope measurement seawater apparent age |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095318A (en) * | 2019-05-30 | 2019-08-06 | 中国科学院海洋研究所 | Utilize the sample collecting apparatus and acquisition method of radioactive krypton isotope measurement seawater apparent age |
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