CN117168910A - Deep sea shallow surface pore water sampling device and sampling method thereof - Google Patents
Deep sea shallow surface pore water sampling device and sampling method thereof Download PDFInfo
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- CN117168910A CN117168910A CN202311237573.1A CN202311237573A CN117168910A CN 117168910 A CN117168910 A CN 117168910A CN 202311237573 A CN202311237573 A CN 202311237573A CN 117168910 A CN117168910 A CN 117168910A
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- 238000005070 sampling Methods 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000011148 porous material Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 72
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 54
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 239000013049 sediment Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000007774 longterm Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000012864 cross contamination Methods 0.000 abstract description 7
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 238000011065 in-situ storage Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 6
- 239000013535 sea water Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 108010066057 cabin-1 Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002572 peristaltic effect Effects 0.000 description 2
- 102100033121 Transcription factor 21 Human genes 0.000 description 1
- 101710119687 Transcription factor 21 Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention discloses a deep sea shallow surface pore water sampling device and a sampling method thereof, which belong to the technical field of deep sea sampling and comprise a sample tube contact pin and a plurality of sampling units, wherein each sampling unit comprises a storage cabin, a negative pressure generating mechanism and a sampling guide tube, one end of the sample tube contact pin is provided with an opening penetrating through a cavity of the sample tube contact pin, the other end of the sample tube contact pin is provided with a cutter head, the side wall of the sample tube contact pin, which is a certain distance away from the cutter head, is provided with a plurality of sampling ports, one end of the sampling guide tube enters the cavity through the opening and is connected with the sampling ports, the other end of the sampling guide tube is connected with the storage cabin, the sampling ports are correspondingly communicated with the storage cabin one by one through the sampling guide tube, and the storage cabin generates negative pressure adsorption force through the negative pressure generating mechanism so as to suck pore water at the sampling ports into the storage cabin. According to the invention, pore water at the sample inlet can enter different storage cabins according to different time sequences, the pore water at the previous time sequence can not be doped, and the sampling can be performed according to different time sequences on the basis of ensuring the relative independence between samples, so that the cross contamination is effectively avoided.
Description
Technical Field
The invention relates to the technical field of deep sea sampling, in particular to a deep sea shallow surface pore water sampling device and a sampling method thereof.
Background
The deep sea sediment pore water sampling research has important significance for marine resource exploration and development, and particularly can provide effective geochemical characteristic information in the aspect of submarine natural gas hydrate exploration, so that the application range is more common in the fields of marine oil gas and marine environment resource exploration and the like.
Because the deep sea bottom is a high-pressure, low-temperature and strong-corrosion environment, the sea bottom topography is complex, and the surrounding seawater solution is in a dynamic change process all the time, the conditions cause that the collection of the sediment pore water of the sea bottom is more difficult than the collection of the sediment pore water of other areas. Pore water sampling commonly used at present is mainly divided into ex-situ sampling and in-situ sampling. In-situ sampling mainly comprises dialysis bag devices (pepers), rhizons, DGT and other in-situ sampling devices for short term and in-situ sampling devices powered by peristaltic pumps or osmotic pumps. In-situ sampling devices for short periods cannot meet the long-term sampling requirements. The existing in-situ acquisition device using peristaltic pumps and the like as power has the defects of complex structure, limited sampling depth and point location, incapability of simultaneously considering the problems of rich sampling density and sample quantity, and incapability of determining corresponding sampling within a certain time. When the device is applied to a deep sea environment, the problems of difficult heat preservation, pressure maintaining and the like are very easy to occur due to the complex deep sea environment, and the in-situ autonomous sampling of the pore water of the deep sea sediment is difficult to realize.
The application publication number is CN 116046469A's chinese patent discloses a spring drive formula pore water sampler, including spring drive subassembly, piston assembly, sampling tube and sampling contact pin, piston assembly's piston rod and spring drive subassembly's drive end fixed connection, piston assembly's piston chamber and sampling tube intercommunication, piston assembly and sampling contact pin's top fixed connection, sampling contact pin's bottom is most advanced and is used for inserting subaerial, sampling inlet has been seted up to sampling contact pin lateral wall, the sampling tube is kept away from piston chamber's one end and can be with the sample inlet intercommunication, be full of protection solution in the sampling tube in advance, spring drive subassembly can drive the piston rod after external force triggers the start-up and with the protection solution extraction in the sampling tube to the piston intracavity store, the pore water in the sampling contact pin outside can flow in the sampling tube when presenting the negative pressure in the sampling tube. The scheme can realize in-situ sampling of pore water, but has only a single function of sampling and does not have a function of sampling at different time sequences.
For example, chinese patent with the publication number CN 215218198U discloses a water quality fixed point monitoring recoverer in sea area, which comprises a box body, the balancing weight, water pump and air pump, the water inlet in box inner chamber intercommunication is seted up to the bottom of box, water inlet department is provided with the water pump, the delivery port intercommunication of water pump has the delivery elbow that sets up in box inner chamber, a plurality of wash ports that set up side by side are seted up to the lateral wall of delivery elbow, and this wash port intercommunication has the collector pipe, the inside of collector pipe is provided with the solenoid valve, the other end intercommunication of delivery elbow has the air pump, the inside of air pump and box is provided with the PLC controller that is used for controlling the operation of water pump, air pump and solenoid valve, control a plurality of solenoid valves and open at different time points in proper order through the PLC controller, can make the sea water sample of different time periods of collecting in each collecting bottle. However, this solution shares a common water inlet, which is prone to cross-contamination when sampling seawater samples at different time periods, resulting in inaccurate sampling results.
Therefore, how to sample according to different time sequences, and the samples are relatively independent, so that cross contamination is avoided, and the method is a technical problem faced when deep sea sediment pore water is sampled.
Disclosure of Invention
The invention aims to provide a deep sea shallow surface pore water sampling device and a sampling method thereof, which are used for solving the problems in the prior art, different sampling inlets are communicated with storage cabins in a one-to-one correspondence manner by utilizing different sampling pipes, pore water at the sampling inlets can enter different storage cabins according to different time sequences, the pore water entering each storage cabin enters from different sampling inlets, and the pore water at the previous time sequence cannot be doped, so that sampling can be carried out according to different time sequences on the basis of ensuring relative independence between samples, and cross contamination is effectively avoided.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a deep sea shallow surface pore water sampling device which comprises a sample tube contact pin and a plurality of sampling units, wherein each sampling unit comprises a storage cabin, a negative pressure generating mechanism and a sampling guide pipe, each sample tube contact pin is provided with a cavity for accommodating the corresponding sampling guide pipe, one end of each sample tube contact pin is provided with an opening penetrating through the corresponding cavity, the other end of each sample tube contact pin is provided with a cutter head, a plurality of sampling ports are arranged on the side wall of each sample tube contact pin, which is spaced from the corresponding cutter head by a certain distance, one end of each sampling guide pipe enters the corresponding cavity through the corresponding opening and is connected with the corresponding sampling port, the other end of each sampling guide pipe is connected with the corresponding storage cabin, the corresponding storage cabin generates negative pressure adsorption force through the corresponding negative pressure generating mechanism, and pore water at the corresponding sampling port is sucked into the corresponding storage cabin.
Preferably, the sample inlet comprises a plurality of first sample inlets and a plurality of second sample inlets, a filtering sieve plate is respectively arranged in the first sample inlets and the second sample inlets, the first sample inlets and the second sample inlets are respectively distributed along the circumferential direction of the sample tube pins, and the distance between the first sample inlets and the cutter head is smaller than the distance between the second sample inlets and the cutter head.
Preferably, the storage cabin comprises a cabin body, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are connected to two ends of the cabin body, the lower end cover is provided with a one-way liquid inlet, the one-way liquid inlet is connected with the sample introduction guide pipe, a liquid level sensor is arranged in the cabin body, and the liquid level sensor is arranged on the upper end cover.
Preferably, the negative pressure generating mechanism comprises a driving structure and a piston arranged in the cabin body, the driving structure is connected with the piston through a piston rod, the driving structure is utilized to drive the piston to move along the axial direction of the cabin body, and a one-way liquid outlet is arranged at one end of the cabin body, which is close to the lower end cover.
Preferably, the driving structure comprises a motor, a screw rod connected to the output end of the motor and a linkage limiting support in threaded connection with the screw rod, a pair of storage cabins are mounted on the linkage limiting support, the piston rods of the storage cabins penetrate through the linkage limiting support, an axial limiting structure is arranged between the piston rods and the linkage limiting support, and the screw rod drives the linkage limiting support to axially move when rotating, so that the piston is driven to axially move.
Preferably, a mixing stirring blade is arranged at one end of the piston, which is close to the unidirectional liquid inlet, the mixing stirring blade is connected to the piston rod, the end part of the piston rod, which penetrates through the linkage limiting support, is connected with a rotation driving structure, and the mixing stirring blade rotates along with the rotation of the piston rod.
Preferably, the storage cabins are arranged on the same linkage limiting bracket, one storage cabin is communicated with the first sample inlet, and the other storage cabin is communicated with the second sample inlet.
Preferably, the storage compartment comprises an upper support plate, a lower support plate and a support rod connected between the upper support plate and the lower support plate, wherein a placement space for accommodating the storage compartment is formed between the upper support plate and the lower support plate.
The invention also provides a sampling method using the deep sea shallow surface pore water sampling device, which comprises the following steps:
filling pure water in the sample introduction guide pipe in advance;
fixing the sampling device in a deep sea sediment soil layer or carrying a lander for long-term monitoring work, and waiting for a period of time before starting sampling so as to restore the original surrounding environment;
after the external environment is stable, the piston moves upwards in the cabin body, pore water continuously replaces pure water in the sample introduction conduit, and the pure water in the sample introduction conduit enters the cabin body through the one-way liquid inlet;
the liquid level reaches a specified liquid level, and the piston stops moving;
after stopping for a period of time, the piston moves downwards, pure water in the cabin body is discharged through the one-way liquid discharge port, and after the pure water is completely discharged, the piston stops moving downwards;
after stopping for a period of time, the piston moves upwards, and pore water in the sample introduction guide pipe is sucked into the cabin;
after sampling of one storage cabin is completed, setting sampling starting time of other storage cabins according to requirements, and obtaining sampling samples of different time sequences.
Preferably, a three-way valve is arranged on the sample injection conduit, one of the through openings of the three-way valve is used as an alcohol injection opening, alcohol is injected into the sample injection conduit from the alcohol injection opening, the piston rod drives the mixing stirring blade to rotate, pore water and alcohol in the cabin body are uniformly mixed, and a pore water sample is stored.
Compared with the prior art, the invention has the following technical effects:
according to the invention, different sample inlets are communicated with the storage cabins in a one-to-one correspondence manner by utilizing different sample introduction conduits, so that pore water at different sample inlets can enter different storage cabins according to different time sequences, and as the pore water entering each storage cabin enters from different sample inlets, the pore water at the next time sequence cannot be doped with the pore water at the previous time sequence, and thus, on the basis of ensuring relative independence between samples, sampling can be carried out according to different time sequences, and cross contamination is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a part of the storage compartment of FIG. 1;
FIG. 3 is a schematic diagram of a single sampling unit in FIG. 2;
FIG. 4 is a cross-sectional view of a storage compartment of the present invention;
1, a motor cabin; 2. a screw rod protecting sleeve; 3. a screw rod; 4. an upper support plate; 5. a lower support plate; 6. a sample tube pin; 7. a cutter head; 8. a first sample inlet; 9. a second sample inlet; 10. a support rod; 11. a storage compartment; 12. a linkage limiting bracket; 13. an upper end cap; 14. a piston rod; 15. a cabin body; 16. a piston; 17. a lower end cap; 18. a unidirectional liquid inlet; 19. a one-way liquid discharge port; 20. mixing and stirring blades; 21. a liquid level sensor; 22. and (5) supporting frames.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a deep sea shallow surface pore water sampling device and a sampling method thereof, which are used for solving the problems in the prior art, different sampling inlets are communicated with storage cabins in a one-to-one correspondence manner by utilizing different sampling pipes, pore water at the sampling inlets can enter different storage cabins according to different time sequences, the pore water entering each storage cabin enters from different sampling inlets, and the pore water at the previous time sequence cannot be doped, so that the sampling can be carried out according to different time sequences on the basis of ensuring relative independence between samples, and cross contamination is effectively avoided.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 4, the invention provides a deep sea shallow surface pore water sampling device, which comprises a sample tube contact pin 6 and a plurality of sampling units, wherein the sample tube contact pin 6 is used for being inserted into a pore of a position to be sampled so as to enable a sample inlet to reach a set position for sampling. The sampling unit comprises one or more storage cabins 11, a negative pressure generating mechanism and a sample introduction conduit, the storage cabins 11 are used for storing the acquired pore water samples, the negative pressure generating mechanism provides negative pressure suction force for sucking the pore water by the storage cabins 11, the negative pressure generating mechanism can be in the structural forms of a piston structure, a pump body structure and the like, and of course, other structures capable of realizing negative pressure adsorption in the field can be applied as long as the suction of the pore water can be realized. The sample introduction conduit can adopt a pipe body structure for flowing pore water, pure water, alcohol and other mediums, is not particularly limited and restricted, and can be a plastic hose, a metal pipe or the like, and the sample introduction conduit is not shown in the drawings. The sample tube contact pin 6 can adopt a straight tubular structure, a cavity for accommodating the sample introduction pipe is formed in the straight tubular structure, an opening (the setting of the sample introduction pipe is convenient) penetrating through the cavity is formed in one end (the upper end when sampling is performed) of the sample tube contact pin 6, a tool bit 7 is arranged at the other end (the lower end when sampling is performed, namely, the sampling end directly inserted into the hole) of the sample tube contact pin 6, the tool bit 7 can adopt a conical structure, and the tool bit 7 can be conveniently inserted into sediment. Be provided with a plurality of sample inlets on the lateral wall of sample tube contact pin 6, the sample inlet has certain interval apart from tool bit 7, and the interval of different sample inlets apart from tool bit 7 can be different, and the purpose can collect the pore water of different degree of depth. When the sample introduction guide pipes are connected, one end of the sample introduction guide pipe enters the cavity through the opening of the sample tube contact pin 6 to connect with a sample introduction port, one sample introduction guide pipe is connected with one sample introduction port, and the other end of the sample introduction guide pipe is connected with the storage cabin 11. The sample inlets are communicated with the storage cabins 11 in a one-to-one correspondence manner through sample introduction conduits, the storage cabins 11 generate negative pressure adsorption force through a negative pressure generating mechanism, and pore water at the sample inlets is sucked into the storage cabins 11.
According to the invention, different sample inlets are communicated with the storage cabins 11 in a one-to-one correspondence manner by utilizing different sample introduction pipes, pore water at different sample inlets can enter different storage cabins 11 through different sample introduction pipes, the pore water at different sample inlets can enter different storage cabins 11 according to different time sequences by setting the starting time of the negative pressure generating mechanism corresponding to different storage cabins 11, and the pore water entering each storage cabin 11 enters from different sample inlets and passes through different sample introduction pipes, so that the pore water collected at different time sequences does not interfere with each other, the pore water at the next time sequence cannot be doped with the pore water at the previous time sequence, and thus, on the basis of ensuring the relative independence between samples, the pore water at the next time sequence can be sampled according to different time sequences, and cross contamination is effectively avoided. The device and the sampling mode fill the blank of the in-situ pore water sampler in terms of time precision, simultaneously provide important technical means support for the in-situ autonomous sampling of the deep sea pore water, and can be applied to the fields of marine natural gas hydrate exploration and exploitation, marine ecological environment monitoring and the like.
As shown in fig. 1, the sample inlet may include a plurality of first sample inlets 8 and a plurality of second sample inlets 9, where the first sample inlets 8 are distributed along the circumferential direction of the sample tube pins 6, for example, three sample inlets are distributed, and the distances between the three first sample inlets 8 and the tool bit 7 are consistent; the second sample inlets 9 are distributed along the circumferential direction of the sample tube pins 6, for example, three second sample inlets 9 are distributed, and the distances between the three second sample inlets 9 and the cutter head 7 are consistent; furthermore, the distance between the first sample inlet 8 and the cutter head 7 is smaller than the distance between the second sample inlet 9 and the cutter head 7, for example, the distance between the first sample inlet and the cutter head 7 is 10cm, and the distance between the second sample inlet and the cutter head 9 is 30cm. And a filtering sieve plate is arranged in the first sample inlet 8 and the second sample inlet 9 respectively, and large-particle impurities in sediment can be roughly filtered through the arrangement of the filtering sieve plate, so that pore water can be efficiently obtained.
As shown in fig. 4, the storage compartment 11 includes a compartment body 15, and an upper end cap 13 and a lower end cap 17 connected to both ends of the compartment body 15, the compartment body 15 may have a cylindrical structure, the cross section of which is generally circular, and particularly may have other shapes such as a triangle, a rectangle, etc., and if the piston 16 is provided, the shape of the piston 16 should be consistent with the cross section of the cylindrical structure so that the piston 16 may move in an axial direction to change the size of the cavity. The lower end cover 17 is provided with a one-way liquid inlet 18, the one-way liquid inlet 18 can only feed liquid into the cabin body 15 in a one-way, and the one-way liquid inlet 18 can be realized by arranging a one-way valve, and is connected with a sample injection duct, so that pore water of the sample injection port can only flow into the cabin body 15 in one-way through the sample injection duct. The liquid level sensor 21 is arranged in the cabin 15, the liquid level sensor 21 can be arranged on the upper end cover 13, and the liquid level height reached by the liquid in the cabin 15 can be detected through the liquid level sensor 21.
As shown in fig. 1 to 4, the negative pressure generating mechanism may include a driving structure and a piston 16 disposed in the cabin 15, where the driving structure may be in a form of a linear motor, a telescopic cylinder, or the like, and the driving structure is connected to the piston 16 through a piston rod 14, and the driving structure is used to drive the piston 16 to move along the axial direction of the cabin 15. One-way liquid draining port 19 is arranged at one end of the cabin body 15 close to the lower end cover 17, and the one-way liquid draining port 19 can only drain liquid to the outside of the cabin body 15 in one way, and can be realized by arranging a one-way valve. When the piston 16 moves away from the lower end cover 17, liquid can enter the cabin 15 through the one-way liquid inlet 18; when the piston 16 moves towards the lower end cover 17, liquid can be discharged out of the cabin 15 through the one-way liquid discharge port 19.
Further, the driving structure may include a motor, a screw rod 3 connected to an output end of the motor, and a linkage limiting support 12 screwed to the screw rod 3, and it should be noted that, due to sampling in a deep sea environment, the motor casing is installed in the motor cabinet 1, and the motor cabinet 1 is used as a protection casing to ensure normal operation of the motor, and meanwhile, the screw rod 3 may also be protected by adopting the screw rod protection sleeve 2, so as to be adapted to a marine environment. The two storage cabins 11 are synchronously operated by the same linkage limiting bracket 12, and meanwhile, the two storage cabins 11 are arranged side by side and also play a limiting role in the rotation of the linkage limiting bracket 12, so that a screw nut structure is integrally formed by the screw 3 and the linkage limiting bracket 12, and a limiting structure for the rotation of the linkage limiting bracket 12 is omitted. An axial limiting structure is arranged between the piston rod 14 and the linkage limiting support 12, and the axial limiting structure can be a baffle plate, an annular groove and the like, so that when the screw rod 3 rotates to drive the linkage limiting support 12 to axially move, the piston 16 can be smoothly driven to axially move, and then the purposes of liquid inlet and liquid outlet are realized by matching with the unidirectional liquid inlet 18 and the unidirectional liquid outlet 19.
As shown in fig. 4, a mixing blade 20 is disposed at one end of the piston 16 near the unidirectional liquid inlet 18, the mixing blade 20 is connected to the piston rod 14, the mixing blade 20 moves axially along with the piston rod 14 when the piston rod 14 moves axially, and the mixing blade 20 rotates along with the piston rod 14 when the piston rod rotates. In order to realize the rotation of the piston rod 14, the end part of the piston rod 14 penetrating through the linkage limiting support 12 is connected with a rotation driving structure, the rotation driving structure can be another rotation motor, the rotation motor can be arranged on the linkage limiting support 12, the mixing stirring vane 20 rotates along with the rotation of the piston rod 14 under the drive of the rotation motor, and stirring and mixing of liquid in the cabin 15 are realized through the rotation of the piston rod 14.
As shown in fig. 1 to 3, there may be two storage tanks 11 mounted on the same linkage limiting support 12, where one storage tank 11 is connected to the first sample inlet 8, and the other storage tank 11 is connected to the second sample inlet 9, and when the linkage limiting support 12 is used to drive different piston rods 14 of the two storage tanks 11 to move, pore water with different depths of the first sample inlet 8 and the second sample inlet 9 may be simultaneously taken.
As shown in fig. 1 to 3, it may further include an upper support plate 4, a lower support plate 5, and a support rod 10 connected between the upper support plate 4 and the lower support plate 5, and an end of the support rod 10 may be provided with threads, directly connected to the upper support plate 4 by the threads or locked by nuts. The center of the lower supporting plate 5 is provided with a round hole, and the round hole corresponds to the opening of the sample tube contact pin 6 and can pass through the sample introduction guide tube. A space for accommodating the storage compartment 11 is formed between the upper support plate 4 and the lower support plate 5, a support frame 22 is provided in the space for accommodating the storage compartment 11, the compartment body 15 (or the lower end cover 17) of the storage compartment 11 is fixed on the support frame 22, the support frame 22 is further provided with a mounting hole penetrating the support rod 10, and the support frame 22 is mounted on the support rod 10, at this time, the support frame 22 is limited by the support rod 10, and the position of the storage compartment 11 can be stably fixed.
As shown in fig. 1 to 4, the present invention further provides a sampling method using the deep sea shallow surface pore water sampling device as described above, comprising the following steps:
filling pure water in the sample introduction guide pipe in advance;
fixing the sampling device in a deep sea sediment soil layer or carrying a lander for long-term monitoring work, and waiting for a period of time before starting sampling so as to restore the original surrounding environment;
after the external environment is stable, the piston 16 moves upwards in the cabin 15, pore water continuously replaces pure water in the sample introduction conduit, and the pure water in the sample introduction conduit enters the cabin 15 through the one-way liquid inlet 18;
the liquid level reaches a prescribed liquid level, and the piston 16 stops moving;
after stopping for a period of time, the piston 16 moves downwards, pure water in the cabin body 15 is discharged through the one-way liquid outlet 19, and after the pure water is completely discharged, the piston 16 stops moving downwards;
after stopping for a period of time, the piston 16 moves upwards, and pore water in the sample introduction pipe is sucked into the cabin 15;
after sampling of one storage cabin 11 is completed, the sampling starting time of other storage cabins 11 is set according to the requirement, and sampling samples of different time sequences are obtained.
Further, a three-way valve may be disposed on the sample injection conduit, one of the ports of the three-way valve is used as an alcohol injection port, alcohol is injected into the sample injection conduit from the alcohol injection port, the alcohol and pore water enter the chamber 15 together, the piston rod 14 drives the mixing blade 20 to rotate, the pore water and alcohol in the chamber 15 are uniformly mixed, and a pore water sample is stored.
The invention also provides the following embodiments:
before sampling: pure water is filled in the sample introduction guide pipe in advance so as to prevent the seawater from polluting the pipeline.
The sampling process comprises the following steps: the whole set of device is fixed in a deep sea sediment soil layer through carrying a movable ground detection platform and a laying device of a platform body or carries a lander for long-term monitoring work. Because the sample tube pin 6 and the tool bit 7 inevitably generate disturbance to the sediment layer when penetrating, a period of time is needed to wait for the surrounding environment to be restored before sampling is started.
After the external environment is stable, the sampling action is started.
One of the motor pods 1 begins to operate and the motor pod 1 drives the plunger 16 upward. The filter sieve plate is arranged in the holes of the first sample inlet 8 and the second sample inlet 9, so that large-particle impurities in sediment can be roughly filtered, and pore water can be efficiently obtained. The filtered pore water with different depths enters the sample introduction guide pipe from the first sample introduction port 8 and the second sample introduction port 9 at the same time. In the sampling process, the piston rod 14 moves upwards, pore water continuously replaces pure water in the sample introduction pipe, and the pure water in the sample introduction pipe enters the storage cabin 11 through the one-way liquid inlet 18. The liquid level sensor 21 judges that the liquid level reaches the prescribed liquid level, and the motor compartment 1 stops driving to move upwards after the sampling is completed.
After stopping 5s, the motor cabinet 1 controls the piston 16 to move downwards, pure water in the storage cabinet 11 is discharged through the one-way liquid outlet 19, and the pure water is judged to be completely discharged through the liquid level sensor 21, so that the motor cabinet 1 stops driving to move downwards.
After stopping for 5 seconds, the motor cabin 1 controls the piston 16 to move upwards, pore water in the sample injection conduit is sucked into the storage cabin 11, alcohol is injected into the sample injection conduit from the alcohol injection port, at the moment, the motor is rotated to control the piston rod 14 to drive the mixing stirring blade 20 to rotate, the pore water in the cabin body 15 and the alcohol are uniformly mixed, and a pore water sample is stored.
After the motor cabin 1 is sampled, sampling time for the second and third motor cabins 1 can be set according to requirements, sampling samples with different time sequences can be obtained, and the blank of the in-situ pore water sampler in time precision is filled.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a shallow superficial pore water sampling device of deep sea which characterized in that: including sample tube contact pin and a plurality of sampling unit, sampling unit includes storage cabin, negative pressure production mechanism and advances kind pipe, the sample tube contact pin has the holding advance kind pipe's cavity, the one end of sample tube contact pin is provided with and link up the opening of cavity, the other end of sample tube contact pin is provided with the tool bit, and is apart from the certain interval of tool bit be provided with a plurality of sample inlets on the lateral wall of sample tube contact pin the one end of advance kind pipe passes through the opening gets into the cavity internal connection advance kind mouth, advance kind pipe's the other end and connect advance the storage cabin, advance kind pipe with advance kind pipe one-to-one intercommunication of storage cabin, advance kind mouth and pass through negative pressure production mechanism produces negative pressure adsorption force, will the pore water of advance kind mouth department is inhaled advance the storage cabin.
2. The deep sea shallow skin pore water sampling device of claim 1, wherein: the sample inlet comprises a plurality of first sample inlets and a plurality of second sample inlets, wherein a filtering sieve plate is respectively arranged in the first sample inlets and the second sample inlets, the first sample inlets and the second sample inlets are respectively distributed along the circumferential direction of the sample tube contact pin, and the distance between the first sample inlets and the cutter head is smaller than the distance between the second sample inlets and the cutter head.
3. The deep sea shallow skin pore water sampling device of claim 2, wherein: the storage cabin comprises a cabin body, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are connected with the two ends of the cabin body, the lower end cover is provided with a one-way liquid inlet, the one-way liquid inlet is connected with the sample introduction guide pipe, a liquid level sensor is arranged in the cabin body, and the liquid level sensor is arranged on the upper end cover.
4. A deep sea shallow skin pore water sampling apparatus as claimed in claim 3, wherein: the negative pressure generating mechanism comprises a driving structure and a piston arranged in the cabin body, the driving structure is connected with the piston through a piston rod, the driving structure is utilized to drive the piston to move along the axial direction of the cabin body, and a one-way liquid outlet is arranged at one end, close to the lower end cover, of the cabin body.
5. The deep sea shallow skin pore water sampling device of claim 4, wherein: the driving structure comprises a motor, a screw rod connected to the output end of the motor and a linkage limiting support in threaded connection with the screw rod, a pair of storage cabins are mounted on the linkage limiting support, the piston rods of the storage cabins penetrate through the linkage limiting support, an axial limiting structure is arranged between the piston rods and the linkage limiting support, and the screw rod drives the linkage limiting support to axially move when rotating, so that the piston is driven to axially move.
6. The deep sea shallow skin pore water sampling device of claim 5, wherein: the one end that the piston is close to one-way inlet is provided with mixing stirring vane, mixing stirring vane connects on the piston rod, the piston rod runs through the end connection of the spacing support of linkage has rotation drive structure, mixing stirring vane rotates along with the rotation of piston rod.
7. The deep sea shallow skin pore water sampling device of claim 5, wherein: the storage cabins are arranged on the same linkage limiting support, one storage cabin is communicated with the first sample inlet, and the other storage cabin is communicated with the second sample inlet.
8. The deep sea shallow skin pore water sampling device of claim 1, wherein: including last backup pad, lower bolster connect go up the backup pad with bracing piece between the lower bolster, go up the backup pad with form between the lower bolster and hold the space of laying of bin.
9. A sampling method using the deep sea shallow surface pore water sampling device according to any one of claims 4 to 8, comprising the following steps:
filling pure water in the sample introduction guide pipe in advance;
fixing the sampling device in a deep sea sediment soil layer or carrying a lander for long-term monitoring work, and waiting for a period of time before starting sampling so as to restore the original surrounding environment;
after the external environment is stable, the piston moves upwards in the cabin body, pore water continuously replaces pure water in the sample introduction conduit, and the pure water in the sample introduction conduit enters the cabin body through the one-way liquid inlet;
the liquid level reaches a specified liquid level, and the piston stops moving;
after stopping for a period of time, the piston moves downwards, pure water in the cabin body is discharged through the one-way liquid discharge port, and after the pure water is completely discharged, the piston stops moving downwards;
after stopping for a period of time, the piston moves upwards, and pore water in the sample introduction guide pipe is sucked into the cabin;
after sampling of one storage cabin is completed, setting sampling starting time of other storage cabins according to requirements, and obtaining sampling samples of different time sequences.
10. The sampling method according to claim 9, wherein: the three-way valve is arranged on the sample injection guide pipe, one of the ports of the three-way valve is used as an alcohol injection port, alcohol is injected into the sample injection guide pipe from the alcohol injection port, the piston rod drives the mixing stirring blade to rotate, pore water and alcohol in the cabin body are uniformly mixed, and a pore water sample is stored.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117491090A (en) * | 2023-12-27 | 2024-02-02 | 阳光学院 | Sampling device and method for water pollution detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491090A (en) * | 2023-12-27 | 2024-02-02 | 阳光学院 | Sampling device and method for water pollution detection |
| CN117491090B (en) * | 2023-12-27 | 2024-03-29 | 阳光学院 | Sampling device and method for water pollution detection |
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