CN110749478A - Offshore sediment in-situ interstitial water and overlying water collecting device - Google Patents
Offshore sediment in-situ interstitial water and overlying water collecting device Download PDFInfo
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- CN110749478A CN110749478A CN201910964068.4A CN201910964068A CN110749478A CN 110749478 A CN110749478 A CN 110749478A CN 201910964068 A CN201910964068 A CN 201910964068A CN 110749478 A CN110749478 A CN 110749478A
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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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1472—Devices not actuated by pressure difference
- G01N2001/149—Capillaries; Sponges
Abstract
The invention relates to a device for collecting an offshore water sample, in particular to a device for collecting in-situ interstitial water and overlying water of offshore sediments, which comprises an interstitial water sampling head, an overlying water sampling head, a connecting pipe and a handle which are sequentially connected; the gap water sampling head comprises a gap water capillary tube, the upper water-covering sampling head comprises an upper water-covering capillary tube, one end of the gap water capillary tube and one end of the upper water-covering capillary tube are respectively arranged in the corresponding sampling heads, the other ends of the gap water capillary tube and the upper water-covering capillary tube are respectively connected with a hose, the two hoses are respectively arranged in the connecting pipe in a penetrating manner, extend out of the handle and are respectively connected with the two syringes. The gap water is collected through the gap water sampling head, the upper water is collected through the upper water sampling head, the gap water and the upper water sampling head form a vacuum environment through the injector, the upper water can be prevented from being brought into the collecting process when the gap water is collected, the collecting difficulty of the upper water is also reduced, and the problem that the upper water is inevitably brought into the gap water in the collecting process in the prior art is solved.
Description
Technical Field
The invention relates to a device for collecting an offshore water sample, in particular to a device for collecting in-situ interstitial water and overlying water of offshore sediments.
Background
Offshore is significantly affected by human activity, and large amounts of suspended particulate matter enter the ocean. Suspended substances entering the sea begin to be in a loose state and are distributed in layers when the suspended substances are settled to the sea bottom. Through the diagenetic effects of compaction, cementation, recrystallization and the like, the consolidation condition and the components of deep sediments are different from those of a surface layer, and the composition of interstitial water of the sediments is changed along with the difference of the depth of the sediments. Sediment organic matters can generate a substance absorption or exchange process with seawater in the process of burying and mineralizing at the seabed, and the main path for generating exchange is the transmission of interstitial water and overlying water. The research on the dynamics of substances in the sediment helps to understand the behaviors of the substances in the whole water environment system, such as sediment-water interface diffusion flux and influencing factors, the chemical forms of substances in surface sediment and diagenetic models thereof, and the process of burying water bottom mineralization and nutrient substances, which need to determine the chemical compositions and contents of interstitial water and overlying water.
At present, the collection of the water in the clearance of the sediment is mainly obtained by collecting the sediment through a mud grab bucket and centrifuging. As the sediment is inevitably brought into the overlying water in the collecting process, the actual condition of the interstitial water is difficult to reflect really and has a certain difference with the in-situ interstitial water. The sampling means of the overlying water is less, and the seawater on the surface layer of the sediment is mainly absorbed after the sediment is collected.
The existing method for partially acquiring the sediment interstitial water is applied to lakes or reservoirs, and the method mainly places the interstitial water on a sampling pipe through extraction devices such as solid-phase micro-extraction and low-density polyethylene films to form a vacuum environment to realize passive acquisition of the interstitial water. However, since offshore areas are affected by tides and waves, such devices have been unable to achieve automated collection for a while, and have been unable to achieve sample collection in wetland sub-tidal areas. Therefore, there is a need for a device that can simultaneously collect interstitial water and overlying water below a uniform site to ensure reliable and accurate results.
It can be seen that the following problems exist in the prior art:
1. the gap water is inevitably brought into the overlying water in the collecting process;
2. the difficulty of collecting the overlying water is high;
3. in-situ collection cannot be guaranteed, so that the data for measuring the chemical composition and content of the collected interstitial water and the collected overlying water is inaccurate.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a device for collecting in-situ interstitial water and overlying water of offshore sediments.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a device for collecting in-situ interstitial water and overlying water of offshore sediments comprises an interstitial water sampling head, an overlying water sampling head, a connecting pipe and a handle which are sequentially connected from bottom to top; the gap water sampling head comprises a plurality of gap water capillary tubes, the upper water coating sampling head comprises a plurality of upper water coating capillary tubes, one ends of the gap water capillary tubes and one ends of the upper water coating capillary tubes are respectively arranged in the corresponding sampling heads, the other ends of the gap water capillary tubes and the upper water coating capillary tubes are respectively connected with hoses, and the two hoses are all arranged in the connecting pipe in a penetrating mode, extend out of the handle and are respectively connected with the two syringes.
As an improvement of the technical scheme of the device for collecting the in-situ interstitial water and the overlying water of the offshore sediments, the interstitial water sampling head comprises a conical head arranged at the bottom and a first cylinder arranged at the upper part of the conical head, and the interstitial water capillary is arranged in the first cylinder; the upper water-covering sampling head comprises a second cylinder, and the upper water-covering capillary tube is arranged in the second cylinder; the first cylinder with all be provided with in the second cylinder and set up the recess of capillary, the clearance water capillary with it sets up to cover the water capillary respectively correspondingly in the recess.
As an improvement of the technical solution of the device for collecting in-situ interstitial water and overburden water of offshore sediments, eight grooves are arranged in the first cylinder and the second cylinder, eight interstitial water capillary tubes are arranged in the interstitial water sampling head, and eight overburden water capillary tubes are arranged in the overburden water sampling head.
As an improvement of the technical scheme of the device for collecting the in-situ interstitial water and the overlying water of the offshore sediments, an inner spiral groove is arranged on the upper part of the first cylinder, an outer spiral groove is arranged on the lower part of the second cylinder, and the first cylinder and the second cylinder are connected with each other through the matching of the inner spiral groove and the outer spiral groove.
As an improvement of the technical scheme of the device for collecting the in-situ gap water and the overlying water of the offshore sediments, the handle is a T-shaped polypropylene hard circular tube, and the left end and the right end of the handle are respectively connected with an overlying water injector and a gap water injector; the two hoses are respectively a gap water hose and an upper water covering hose; one end of the gap water hose is connected with the plurality of gap water capillary tubes, and the other end of the gap water hose is connected with the gap water injector; one end of the upper water-covering hose is connected with the upper water-covering capillary tubes, and the other end of the upper water-covering hose is connected with the upper water-covering injector.
As an improvement of the technical solution of the device for collecting in-situ interstitial water and overlying water of offshore sediments, a first connector is arranged at one end of the interstitial water capillary tubes connected with the interstitial water hose, and the first connector is connected with the interstitial water hose; many last water-covering capillary with one of being connected of last water-covering hose is served and is provided with the second connector, the second connector with last water-covering hose is connected, just clearance water hose wears to establish in the second cylinder.
As an improvement of the technical scheme of the device for collecting the in-situ interstitial water and the overlying water of the offshore sediments, the interstitial water hose and the overlying water hose are both polytetrafluoroethylene hoses, and the outer diameters of the interstitial water hose and the overlying water hose are 0.1cm, and the inner diameters of the interstitial water hose and the overlying water hose are 5 mm.
As an improvement of the technical scheme of the device for collecting the in-situ interstitial water and the overlying water of the offshore sediments, the connecting pipe is a telescopic pipe, and the telescopic pipe is made of polypropylene materials; through holes are formed in two opposite side walls of the telescopic pipe.
As an improvement of the technical scheme of the device for collecting the in-situ interstitial water and the overlying water of the offshore sediments, the through hole is a circular hole, and the aperture is 0.3 cm.
The offshore sediment in-situ interstitial water and overlying water collecting device further comprises a foldable fixing support, the fixing support comprises a fixing rod which can be folded relative to the middle of the fixing support, and the middle of the fixing support is respectively connected with the interstitial water sampling head and the overlying water sampling head.
Compared with the prior art, the invention has the beneficial effects that:
because the gap water is collected through the gap water sampling head and forms a vacuum environment through the injector, and meanwhile, the upper covering water is collected through the upper covering water sampling head and also forms a vacuum environment through the injector, when the gap water is collected, the upper covering water can be prevented from being brought into the collection process, the collection difficulty of the upper covering water is also reduced, and the problem that the gap water inevitably brings the upper covering water into the collection process and the collection difficulty of the upper covering water is large in the prior art is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a perspective view of a gap water sampling head according to the present invention;
FIG. 3 is a schematic perspective view of an overburden sampling head of the present invention;
FIG. 4 is a schematic structural view of a connecting tube according to the present invention;
FIG. 5 is a schematic view of the structure of a capillary tube according to the present invention;
FIG. 6 is a schematic view of the handle of the present invention;
FIG. 7 is a schematic structural view of a fixing bracket according to the present invention;
description of reference numerals: 1-a gap water sampling head; 2-covering a water sampling head; 3-connecting pipe; 4-a handle; 5-interstitial water capillary; 6-covering a capillary tube with water; 7-a conical head; 8-a first cylinder; 9-a second cylinder; 10-a groove; 11-interstitial water injector; 12-an overlying water syringe; 13-interstitial water hose; 14-covering a water hose; 15-a through hole; 16-a fixed support; 17-a fixation rod; 18-collection end; 19-a connection end; 20-a first connector; 21-second connector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments.
As shown in figure 1, the device for collecting the in-situ gap water and the overlying water of the offshore sediments comprises a gap water sampling head 1, an overlying water sampling head 2, a connecting pipe 3 and a handle 4 which are sequentially connected from bottom to top.
The gap water sampling head 1 comprises a plurality of gap water capillary tubes 5, the upper water-covering sampling head 2 comprises a plurality of upper water-covering capillary tubes 6, one ends of the gap water capillary tubes 5 and one ends of the upper water-covering capillary tubes 6 are respectively arranged in the corresponding sampling heads, the other ends of the gap water capillary tubes and the upper water-covering capillary tubes 6 are respectively connected with hoses, the two hoses are arranged in the connecting pipe 3 in a penetrating mode, extend out of the handle 4 and are respectively connected with the two syringes.
When the device is used, the in-situ gap water and overlying water collecting device for offshore sediments is inserted into water, the injector connected with the gap water capillary 5 is pulled open to form a vacuum environment, and the injector pull rod is fixed to keep the vacuum environment for a long time. After the bottom environment is stable, the injector connected with the overlying water capillary 6 is pulled open, so that the injector can maintain the vacuum environment for a long time, and then a tester can collect a sample.
Because the gap water is collected through the gap water sampling head 1 and forms a vacuum environment through the injector, and meanwhile, the upper water is collected through the upper water sampling head 2 and also forms a vacuum environment through the injector, when the gap water is collected, the upper water can be prevented from being brought into the collection process, the collection difficulty of the upper water is also reduced, and the problems that the gap water inevitably brings the upper water in the collection process and the collection difficulty of the upper water is great in the prior art are solved.
As shown in fig. 2 and 3, the interstitial water sampling head 1 comprises a conical head 7 and a first cylinder 8, wherein the conical head 7 is arranged at the bottom, the first cylinder 8 is arranged at the upper part of the conical head 7, and the interstitial water capillary 5 is arranged in the first cylinder 8. The upper water sampling head 2 comprises a second cylinder 9, and the upper water capillary 6 is arranged in the second cylinder 9. Furthermore, grooves 10 capable of being provided with capillary tubes are arranged in the first cylinder 8 and the second cylinder 9, and the gap water capillary tube 5 and the upper water capillary tube 6 are correspondingly arranged in the grooves 10 respectively. In detail, the grooves 10 in the first cylinder 8 and the second cylinder 9 are in a circular gully shape, taking the gap water sampling head 1 as an example, one end of each of the plurality of gap water capillary tubes 5 is disposed in the first cylinder 8, the plurality of gap water capillary tubes 5 are fixed by the grooves 10, the other ends of the plurality of gap water capillary tubes 5 are connected to a hose, and after the hose collects gap water collected by the plurality of gap water capillary tubes 5, the gap water flows into a syringe along the hose, so that a tester can sample by using the syringe. Similarly, the tester can sample the overburden water through the injector. When in use, the conical head 7 can be used for facilitating the insertion of the invention into the sediment. In more detail, a first connector 20 is arranged at one end of the plurality of gap water capillary tubes 5 connected with the gap water hose 13, and the first connector 20 is connected with the gap water hose 13; one end of the upper water-covering capillary tubes 6, which is connected with the upper water-covering hose 14, is provided with a second connector 21, the second connector 21 is connected with the upper water-covering hose 14, and the gap water hose 13 penetrates through the second cylinder 9. Preferably, the conical head 7 is made of metal, so that the tester can insert the invention into the sediment more easily.
As an embodiment of the present invention, eight grooves 10 are respectively arranged in the first cylinder 8 and the second cylinder 9, eight interstitial water capillary tubes 5 are arranged in the interstitial water sampling head 1, the eight interstitial water capillary tubes 5 are respectively arranged in the eight grooves 10 of the first cylinder 8, eight overlying water capillary tubes 6 are arranged in the overlying water sampling head 2, and the eight overlying water capillary tubes 6 are respectively arranged in the eight grooves 10 of the second cylinder 9.
Preferably, the interstitial water capillary tube 5 and the overlying water capillary tube 6 are both 5cm in length, 2mm in diameter and 0.45 μm in pore size, and are adapted to the grooves 10 in the first cylinder 8 and the second cylinder 9. The first cylinder 8 and the second cylinder 9 can be made of Teflon materials, and the Teflon materials have the properties of atmospheric aging resistance, non-atmospheric aging resistance, acid and alkali resistance, oxidation resistance and the like, so that the service life of the invention can be ensured. In detail, as shown in fig. 5, each of the interstitial water capillary tube 5 and the overlying water capillary tube 6 includes a collecting end 18 and a connecting end 19, the collecting end 18 is fixed in the first cylinder 8 or the second cylinder 9, and the connecting end 19 is connected with the interstitial water syringe 11 and the overlying water syringe 12 through a first connecting head 20 and a second connecting head 21, respectively. In more detail, taking the interstitial water capillary tube 5 as an example, the collection end 18 of the interstitial water capillary tube 5 is fixed in the interstitial water sampling head 1, and the connection end 19 is connected with the interstitial water injector 11 through the connection tube 3 by the first connection head 20.
Further, as shown in fig. 2 to 6, an inner spiral groove is formed on an upper portion of the first cylinder 8, and an outer spiral groove is formed on a lower portion of the second cylinder 9, so that the first cylinder 8 and the second cylinder 9 are connected to each other by the cooperation of the inner spiral groove and the outer spiral groove. In detail, as an embodiment of the present invention, an inner spiral groove is provided on an upper portion of the first cylinder 8, an outer spiral groove is provided on a lower portion of the second cylinder 9, and the first cylinder 8 and the second cylinder 9 are connected by the outer spiral groove and the inner spiral groove. Through the mutually supporting of outer spiral groove and interior spiral groove, realize the interconnect of first cylinder 8 and second cylinder 9, simultaneously, also can avoid covering water sampling head 2 to get into in the sediment district. As another embodiment of the present invention, the first cylinder 8 is provided with an internal thread on an upper portion thereof, and the second cylinder 9 is provided with an external thread on a lower portion thereof, and the first cylinder 8 and the second cylinder 9 are engaged with each other by the internal thread and the external thread. Furthermore, an inner spiral groove is formed in the upper portion of the second cylinder 9, an outer spiral groove is formed in the lower portion of the connecting pipe 3, and the second cylinder 9 and the connecting pipe 3 are connected with each other and can be used for enabling the collecting device to be exposed out of the water surface when gap water and overlying water are collected in an offshore area, so that water samples can be collected conveniently. Preferably, the upper portion of the connecting pipe 3 is also provided with an inner spiral groove, and the lower portion of the handle 4 is provided with an outer spiral groove, so that the connecting pipe 3 can be connected with another connecting pipe 3 through the inner spiral groove on the upper portion, and also can be connected with the handle 4 through the inner spiral groove, when the water at the sampling place is deep, a plurality of connecting pipes 3 can be connected, and the handle 4 above is exposed out of the water. Meanwhile, the gap water hose 13 and the upper water hose 14 with suitable lengths can be selected according to the water depth, so that the gap water hose 13 and the upper water hose 14 are arranged in the connecting pipe 3 and the handle 4 in a penetrating manner.
As shown in fig. 4, the connection tube 3 is a telescopic tube made of polypropylene, and the two side walls of the telescopic tube are both provided with through holes 15, so that the length of the telescopic connection tube 3 can be conveniently adjusted according to the depth of water in the offshore intertidal zone and the underwater zone, and the automatic sampling effect is realized. As an embodiment of the invention, the through hole 15 is a round hole with the aperture of 0.3cm, and is used for removing seawater during sampling and balancing the pressure in the sampler.
As shown in figure 6, the handle 4 is a T-shaped polypropylene hard circular tube, and the left end and the right end of the handle 4 are respectively connected with an overlying water injector 12 and a gap water injector 11. Preferably, the syringe is a disposable universal syringe, and the syringe can be connected with hoses at the left end and the right end of the handle 4. Furthermore, the two hoses are respectively a gap water hose 13 and an upper water covering hose 14, one end of the gap water hose 13 is connected with the plurality of gap water capillary tubes 5, and the other end of the gap water hose is connected with the gap water injector 11; one end of the upper water-covering hose 14 is connected with a plurality of upper water-covering capillary tubes 6, and the other end is connected with the upper water-covering injector 12. When in use, the interstitial water capillary tube 5 is connected with the interstitial water hose 13, and then the interstitial water hose 13 passes through the connecting tube 3 and the handle 4 and is connected with the interstitial water injector 11. Similarly, the upper watering capillary tube 6 is connected to the upper watering hose 14, and then the upper watering hose 14 is connected to the upper watering syringe 12 through the connecting tube 3 and the handle 4. Therefore, the gap water sampling head 1 and the overlying water sampling head 2 are respectively connected with the left end and the right end of the handle 4, and during sampling, testing personnel can sample the gap water and the overlying water conveniently.
Furthermore, the gap water hose 13 and the upper water-covering hose 14 are polytetrafluoroethylene hoses, the diameters of the gap water hose 13 and the upper water-covering hose 14 are both 0.1cm, the inner diameter is 5mm, smooth outflow in a vacuum environment during suction can be guaranteed, and the catheter can be set to different lengths according to the depth of sampled water.
The device for collecting the in-situ interstitial water and the overlying water of the offshore sediments further comprises a foldable fixed support 16, the fixed support 16 comprises a fixed rod 17 which can be folded relative to the middle of the fixed support 16, the middle of the fixed support 16 is respectively connected with the interstitial water sampling head 1 and the overlying water sampling head 2, and the fixed rod 17 can be used for keeping balance for the fixed support 16 and also can ensure in-situ sampling when the device is used. In detail, as an embodiment of the present invention, the middle portion of the fixing bracket 16 is disposed on the outer surfaces of the interstitial water sampling head 1 and the overlying water sampling head 2 in a clip-type manner and fixed by a connecting member such as a screw, so that the fixing bracket 16 is not easily separated from the interstitial water sampling head 1 and the overlying water sampling head 2. As another embodiment of the present invention, the fixing bracket 16 includes four fixing bars. During transportation, the four fixing rods 17 can be folded relative to the middle part of the fixing support 16, so that transportation is facilitated. When the device is used, the four fixing rods 17 are opened relative to the middle of the fixing support 16, so that the four fixing rods 17 are respectively opened towards four directions, the device can be used for fixing the in-situ interstitial water and overlying water collecting device of the offshore sediment, the collecting device is guaranteed to move under the action of water flow during sampling, and the in-situ sampling effect is achieved, and the problems that in the prior art, in-situ collection cannot be guaranteed, and the chemical composition and content of the collected interstitial water and the collected overlying water are inaccurate in data are solved. As an embodiment of the present invention, each of the fixing bars 17 has a length of 3cm, which can secure the fixing effect of the present invention inserted into the sediment.
The device for collecting the in-situ gap water and the overlying water entering the interior of the sediment is characterized in that after the device for collecting the in-situ gap water and the overlying water of the offshore sediment is assembled, the device is inserted into the sediment, after the device and the water are stable, the gap water injector 11 is pulled open to form a vacuum environment, and an annular hollow cylinder is used for fixing an injector pull rod, so that the vacuum environment can be kept for a long time. After the bottom environment is stable, the pull rod of the overlying water injector 12 is pulled open, so that a long-time vacuum environment is formed. After all the devices are set, the person can leave to collect other samples. Therefore, the sampling device also realizes the automatic collection of the in-situ interstitial water and the overlying water.
All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A device for collecting in-situ gap water and overlying water of offshore sediments is characterized by comprising a gap water sampling head, an overlying water sampling head, a connecting pipe and a handle which are sequentially connected from bottom to top;
the gap water sampling head comprises a plurality of gap water capillary tubes, the upper water coating sampling head comprises a plurality of upper water coating capillary tubes, one ends of the gap water capillary tubes and one ends of the upper water coating capillary tubes are respectively arranged in the corresponding sampling heads, the other ends of the gap water capillary tubes and the upper water coating capillary tubes are respectively connected with hoses, and the two hoses are all arranged in the connecting pipe in a penetrating mode, extend out of the handle and are respectively connected with the two syringes.
2. The offshore sediment in situ interstitial water and overburden water collection device of claim 1, wherein the interstitial water sampling head comprises a conical head disposed at a bottom portion and a first cylinder disposed at an upper portion of the conical head, the interstitial water capillary tube being disposed in the first cylinder; the upper water-covering sampling head comprises a second cylinder, and the upper water-covering capillary tube is arranged in the second cylinder; the first cylinder with all be provided with in the second cylinder and set up the recess of capillary, the clearance water capillary with it sets up to cover the water capillary respectively correspondingly in the recess.
3. The offshore sediment in situ interstitial water and overburden water collection device of claim 2, wherein eight grooves are disposed in each of the first cylinder and the second cylinder, eight interstitial water capillaries are disposed in the interstitial water sampling head, and eight overburden water capillaries are disposed in the overburden water sampling head.
4. Offshore sediment in situ interstitial water and overburden water collecting device according to claim 2 or 3, wherein the first cylinder is provided with an inner spiral groove on the upper part and an outer spiral groove on the lower part, the first cylinder and the second cylinder being connected to each other by cooperation of the inner spiral groove and the outer spiral groove.
5. The offshore sediment in-situ interstitial water and overburden water collection device of claim 2, wherein the handle is a T-shaped rigid polypropylene round tube, and an overburden water injector and an interstitial water injector are connected to the left end and the right end of the handle respectively;
the two hoses are respectively a gap water hose and an upper water covering hose; one end of the gap water hose is connected with the plurality of gap water capillary tubes, and the other end of the gap water hose is connected with the gap water injector; one end of the upper water-covering hose is connected with the upper water-covering capillary tubes, and the other end of the upper water-covering hose is connected with the upper water-covering injector.
6. The offshore sediment in situ interstitial water and overburden water collection device of claim 5, wherein a first connector is disposed at an end of the plurality of interstitial water capillary tubes connected to the interstitial water hose, the first connector being connected to the interstitial water hose; many last water-covering capillary with one of being connected of last water-covering hose is served and is provided with the second connector, the second connector with last water-covering hose is connected, just clearance water hose wears to establish in the second cylinder.
7. The offshore sediment in situ interstitial water and overburden water collection device of claim 5 or 6, wherein the interstitial water hose and the overburden water hose are polytetrafluoroethylene hoses, and the interstitial water hose and the overburden water hose have an outer diameter of 0.1cm and an inner diameter of 5 mm.
8. The offshore sediment in situ interstitial water and overburden water collection device of claim 1, wherein the connection tube is a telescoping tube and the telescoping tube is made of polypropylene; through holes are formed in two opposite side walls of the telescopic pipe.
9. The offshore sediment in situ interstitial water and overburden water collection device of claim 8, wherein the through hole is a circular hole and has a diameter of 0.3 cm.
10. The offshore sediment in-situ interstitial water and overburden water collection device of claim 1, further comprising a foldable fixed bracket, wherein the fixed bracket comprises a fixed rod foldable relative to the middle of the fixed bracket, and the middle of the fixed bracket is connected to the interstitial water sampling head and the overburden water sampling head respectively.
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| CN111487091A (en) * | 2020-03-31 | 2020-08-04 | 河海大学 | Coupling device for synchronous layered sampling and hydrological test of overlying water and interstitial water |
| CN112816643A (en) * | 2020-11-19 | 2021-05-18 | 中国环境科学研究院 | Real-time in-situ acquisition and monitoring device for interstitial water of lake and reservoir sediment |
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| CN207816631U (en) * | 2018-01-19 | 2018-09-04 | 福建师范大学 | Overlying water and sediment interstitial water one harvester |
| CN109490500A (en) * | 2018-11-28 | 2019-03-19 | 安徽理工大学 | Hard deposit water sample stratified sampling and real-time monitoring device |
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| CN111487091A (en) * | 2020-03-31 | 2020-08-04 | 河海大学 | Coupling device for synchronous layered sampling and hydrological test of overlying water and interstitial water |
| CN111487091B (en) * | 2020-03-31 | 2021-04-09 | 河海大学 | Coupling device for synchronous layered sampling and hydrological test of overlying water and interstitial water |
| CN112816643A (en) * | 2020-11-19 | 2021-05-18 | 中国环境科学研究院 | Real-time in-situ acquisition and monitoring device for interstitial water of lake and reservoir sediment |
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