CN114062048A - Modular multilayer time sequence deep sea sediment pore fluid sampler and method - Google Patents

Abstract

The invention relates to a modular multi-level time-series deep-sea sediment pore fluid sampler and method, comprising a penetration probe rod, a pressure-resistant bin is arranged on the top of the uppermost casing of the penetration probe rod, and the top surface of the pressure-resistant bin is embedded and installed There are two water-tight connectors. The connector includes a columnar body and an annular boss protruding from the middle of the columnar body. The center of the columnar body is provided with a signal transmission channel, and the columnar body is provided with a through columnar body in the circumferential direction of the signal transmission channel. The upper and lower pore fluid channels, and the upper and lower ends of the pore fluid channels are respectively screwed with open sampling bottles, the annular boss is provided with a fixed channel that communicates with the pore fluid channel, and a control valve and an annular boss are installed in the fixed channel. A metal filter is embedded and installed in the fixed channel port, and the wire interface of the control valve is arranged in the signal transmission channel and is electrically connected with the master control system through the wire. Based on the bluetooth communication technology, the invention can realize large-capacity, high-fidelity and high-efficiency sample collection.

Description

Modular multilayer time sequence deep sea sediment pore fluid sampler and method

Technical Field

The invention relates to the technical field of submarine geological detection, in particular to a modularized multilayer time sequence deep sea sediment pore fluid sampler and a method.

Background

In the water-soil interface region across ocean sediments and the underlying seawater, complex physical, chemical, biological reactions and frequent mass exchanges occur at the moment. Pore fluids (pore water and pore gas) are important ties connecting seabed sediments and seabed seawater, are important sites for carrying out physical, chemical and biological reactions inside sediments, and are main media for exchanging substances across the deep seabed water-soil interface. The research and the understanding of the property change of the pore fluid at the sea water-soil interface and the vicinity thereof have important theoretical and practical significance for revealing the evolution of the marine geological environment, the source and sink process of the marine carbon cycle and the like.

Sampling pore fluids from the interior of deep-sea bottom sediments is the most straightforward and effective method for studying pore fluids. At present, there are two main ways for collecting the pore fluid of marine sediments: one is sampling in a laboratory, namely, sampling seabed sediments firstly, and extracting pore fluid in the sediment sample in a laboratory on a ship by a preparation method such as a centrifugal method, a squeezing filtration method, a vacuum extraction method and the like; one is in-situ sampling, namely, the large in-situ pore fluid sampling device is directly penetrated into the submarine sediment, and the pore fluid is directly sucked into a sampling container on the deep sea bottom to be sealed to finish sampling. In the laboratory sampling method, due to the fact that the deep sea bottom and the laboratory environment have great temperature and pressure difference, gas escape, component variation and ion valence change in pore fluid can be caused in the sampling process, and original information of the pore fluid is difficult to reflect truly; the in-situ sampling method can realize in-situ collection of pore fluid under a real deep sea environment, can furthest store original information of the pore fluid, and is an optimal deep sea sediment pore fluid sampling method, but the conventional large in-situ pore fluid sampling device generally has the problems of poor sampling durability, small sample collection amount, poor container tightness, low sampling efficiency and the like.

Chinese patent application CN108344597A discloses an in-situ automatic deep sea sediment pore water collecting device with simple operation, but the device needs to be operated by a deep submersible vehicle or an ROV mechanical arm, the sampling cost process is complex, the sample collecting amount is small, and the sampling efficiency is low.

Chinese patent application CN105954063A discloses a seabed pore water collection system, which completes pore water sampling by closing a sampling bottle controlled by a solenoid valve, and can simultaneously collect 20 in-situ pore water samples each of which is not less than 100 ml, and the sampling depth is not less than 8 m, the sampling interval is 0.4 m, and can simultaneously collect bottom layer seawater samples of 0.6 m above 3 seabed, the sampling interval is 0.3 m, and no sample is not less than 200 ml. However, the device has the problems of poor sampling durability, small sample collection amount, poor container tightness and the like, and cannot meet the requirement of in-situ sampling of in-situ pore water for a long period.

Chinese patent application CN 105842005A discloses a device for collecting pore water of marine sediments and detecting gas on line in situ and a control method thereof, wherein a solenoid valve is also adopted to control the closing of a sampling bottle to finish the sampling of the pore water, but a pore water collector gas chamber is provided, and the preliminary detection of the components and the content of pore gas can be carried out. However, the device has small sample collection amount, can not meet the requirement of in-situ sampling of in-situ pore water for a long period, has larger initial detection error of pore gas components and content, can not effectively analyze biogeochemical information of pore gas, and is difficult to solve the actual scientific problem.

Chinese patent application CN104833547A discloses an in-situ pore water sampling column and a water sample collecting method, which can realize sampling of seabed pore water with the water depth of 4000 m, and also adopts an electromagnetic valve to control the closing of a sampling bottle to finish sampling of the pore water. However, the device needs to be arranged inside the seabed by using drilling equipment and a drilling head, so that the disturbance to the seabed environment is large, and the collection quality of the pore water sample is greatly influenced.

Chinese patent application CN101398349A discloses an in-situ airtight collection system for pore water of sediment, which also adopts an electromagnetic valve to control the closing of a sampling bottle to complete the sampling of pore water, and is also designed with a buffer chamber capable of releasing and storing water-soluble gas in the pore water sample. However, the sampling bottle of the device is susceptible to external pressure, cannot store the original information of the pore water sample, and has great influence on data quality.

At present, a reliable submarine sediment pore fluid in-situ sampling device is not available, and long-period, large-capacity, high-efficiency and high-fidelity sample collection can be effectively carried out on sediment pore fluid in a complex and variable deep submarine environment, so that the problem to be solved at present is urgently solved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a modularized multi-level time sequence deep sea sediment pore fluid sampler and a method thereof, which can realize high-capacity, high-fidelity and high-efficiency sample collection based on a Bluetooth communication technology.

The invention is realized by the following technical scheme:

the utility model provides a modularization multi-level time sequence deep sea sediment pore fluid sampler, including the injection probe rod that is formed by the vertical concatenation of sleeve pipe through the connecting piece, the injection probe rod is provided with sealed and the inside withstand voltage storehouse that is provided with total control system at the intraductal top of the cover of top, the top surface embedding of withstand voltage storehouse is installed two watertight connectors that are connected with total control system electricity, the connecting piece includes the columnar body that is used for with bushing connection and the protruding annular boss that locates the columnar body middle part, the center of columnar body is seted up the signal transmission passageway that runs through, the columnar body is seted up the pore fluid passageway that runs through the columnar body upper and lower face in the circumference of signal transmission passageway, and the upper and lower end of pore fluid passageway threaded connection has open sampling bottle respectively, set up the fixed passage with pore fluid passageway intercommunication on the annular boss, install control valve and annular boss and install metal filter at the fixed passage mouth in the fixed passage, and a wire interface of the control valve is arranged in the signal transmission channel and is electrically connected with the master control system through a wire.

Further, the top that penetrates into the probe rod is connected with protection frame, protection frame includes supporting disk and under bracing dish, connect through the bracing piece between two supporting disks, go up still being fixed with rings on the supporting disk, go up the embedding in the supporting disk and install the base, set up the passageway that runs through the base on the base, the filter is installed on passageway upper portion to the base, the base has open sampling bottle at passageway lower part threaded connection, install control valve between the inherent filter of passageway of base and the sampling bottle opening end, the watertight connector of being connected with the control valve electricity is installed to the base bottom surface.

Further, the bottom is connected with the toper pointed end in the intraductal bottom of the sleeve that penetrates into the probe rod of lowermost end, the toper pointed end includes the awl point of lower part and is located upper portion and with awl point integrated into one piece's connecting portion, the most advanced signal transmission passageway with sleeve pipe intercommunication is seted up at the center of connecting portion, connecting portion have vertically seted up most advanced hole fluid passage in most advanced signal transmission passageway's circumference, and most advanced hole fluid passage's upper end threaded connection is located the sleeve pipe and open sampling bottle, set up the most advanced fixed passage with most advanced hole fluid passage intercommunication on the connecting portion global, install control flap and connecting portion in the most advanced fixed passage and install metal filter at most advanced fixed passage mouth, control flap's wire interface sets up in most advanced signal transmission passageway and is connected with total control system electricity through the wire.

The conical tip is convenient to penetrate into the seabed, the conical tip is matched with a sampling bottle in the sleeve to collect seabed pore fluid at the lowermost layer, and the controllable valve of the master control system samples the sampling bottle to increase the sampling range.

Further, control flap includes the shell, be provided with smooth chamber and sliding connection has the piston in smooth chamber along fixed passage length direction in the shell, the opening just right with metal filter is seted up to smooth chamber one end, the inherent one end that is close to signal transmission passageway of smooth chamber is provided with the electromagnetic drive mechanism with piston connection, the runner has been seted up along fixed passage length direction at the piston middle part and the runner sets up the runner entry in smooth chamber opening one side, the last shell passageway and the lower shell passageway that run through are seted up respectively on the surface just to pore fluid channel in the upper and lower two sides of shell, the piston is seted up respectively in the top of runner and below can with the first piston passageway of last shell passageway intercommunication and can with the second piston passageway of lower shell passageway intercommunication.

Through the movement of the piston in two directions in the sliding cavity, the first piston channel and the upper shell channel or the second piston channel and the lower shell channel can be respectively communicated, and then pore fluid can be conveniently collected into upper and lower sampling bottles respectively.

Furthermore, the electromagnetic driving mechanism comprises a Bluetooth control module, an electromagnetic coil and a lithium battery, wherein the Bluetooth control module and the electromagnetic coil are arranged in the sliding cavity, the lithium battery is used for supplying power, a telescopic rod extending to the piston is fixed on an electromagnetic coil axis, the end part of the telescopic rod is fixedly connected with the piston through an iron block, and a spring is sleeved on the telescopic rod between the electromagnetic coil and the piston.

Whether solenoid accessible bluetooth control module control is got the electricity, through producing magnetic force and iron plate attraction when getting the electricity, makes the telescopic link shrink, drives the piston and removes, with the second piston passageway of hole fluid through the piston with lower shell passageway intercommunication and leading-in lower part sampling bottle, otherwise, then lose the electricity through solenoid, with the leading-in upper portion sampling bottle of hole fluid.

Furthermore, the power supply cable of the Bluetooth control module is connected to the lithium battery, the control cable of the lithium battery is connected to the electromagnetic coil, and the control end of the Bluetooth control module is electrically connected with the master control system through a wire interface.

The Bluetooth control module is powered by the lithium battery, can control the lithium battery to supply power or cut off the power to the electromagnetic coil, and is connected with the Bluetooth control module through the master control system, so that the master control system can control the on-off control of the electromagnetic coil.

Further, the sampling bottle is seted up the passageway and is provided with sealed piston at the passageway internalization at the other end relative with the opening end, sealed piston connection has the piston release portion that sets up at this terminal surface of sampling bottle, it is the hole runner of T type to have seted up the cross-section in the piston release portion, the opening has all been seted up at the T type both ends of hole runner in the piston release portion, the release mouth has been seted up in the bottom of piston release portion to the T type bottom of hole runner, the collection bottle is at one side vertical fixation of piston release portion with the gag lever post, be fixed with the bellying in the piston release portion, and set up the spacing through-hole that supplies the gag lever post to pass on the bellying.

Carry out the shutoff to the passageway through setting up sealed piston, the pore flow way and the sampling bottle intercommunication of piston release accessible about the activity with the T type, the position of piston release accessible gag lever post and spacing through-hole cooperation can be convenient for adjust piston release to in retrieving the sampling bottle sample.

Furthermore, the top of the penetration probe rod is provided with an anti-settling baffle which is sleeved on the sleeve and is in an inverted cone shape.

The anti-settling baffle is used for preventing the sampler from over-settling caused by the self weight of the sampler after the sampler is completely distributed on the seabed, so that the field distribution effect and the quality of the collected sample are influenced. The anti-settling baffle is a conical stainless steel shell, is directly embedded into the outside of the penetrating rod body of the sampler, and the upper part of the anti-settling baffle is fixedly connected with the upper part protection frame through screw fastening.

A sampling method using a modular multilevel time series deep sea sediment pore fluid sampler, comprising the steps of:

s1, connecting the watertight connector on the pressure-resistant bin to an upper computer through a communication cable to wake up a master control system, setting the working parameters of each control valve, the acquisition frequency and the time sequence of pore fluid acquisition, disconnecting the communication cable after the setting is finished, sealing the watertight connector, and vacuumizing an acquisition bottle;

s2, arranging a sampler, wherein after the sampler enters water, seawater enters the penetration probe rod from the metal filter to fill the pore fluid channel of the connecting piece, and sampling the seabed according to the set sampling frequency;

s3, after the sampler penetrates into the submarine sediment, when the preset acquisition time is reached, the master control system sends a control command to the control valve through the Bluetooth control module, the lithium battery pack supplies power to the electromagnetic coil, the electromagnetic coil generates magnetic force after being electrified, the piston is driven to move by attracting or repelling the permanent magnet, the sampling bottle is communicated with the pore fluid channel, the pore fluid in the submarine sediment and the seawater on the bottom layer of the offshore bottom are attracted to enter the sampling bottle, after the sample collection is completed, the master control system controls the electromagnetic coil to be powered off, the spring drives the piston to reset, the sampling bottle and the pore fluid channel are closed, the sampling bottle sets the acquisition time respectively and acquires the pore fluid in a time sequence;

s4, after the sampler completes a submarine sampling task, the connection between the shipborne geological cable and the top hanging ring of the pore fluid sampler is completed in a way that the ROV underwater robot dives the auxiliary hook, and the pore fluid sampler is pulled up and recovered through the shipborne geological cable.

Furthermore, after the recovery of the pore fluid sampler is finished, the sealed piston is opened by adjusting the piston release part at one end of the sampling bottle, and the pore fluid sample in the sampling bottle is recovered.

The invention has the beneficial effects that:

firstly, a time sequence sampling technology of a pore fluid change profile of a submarine sediment is initiated, long-period, time-averaged and in-situ continuous sampling of cross-deep-seabed-stratum water-soil interface substance exchange is realized, and quantitative research and theoretical understanding on deep-seabed-stratum pore fluid migration and release are improved.

And secondly, a pore fluid collection technology driven by deep seabed super-pore pressure is innovated, the volume capacity of the sampling container is increased, the sample collection efficiency and the collection amount are improved, the structure is simple, the number of movable parts is small, the overall stability is high, the reliability is good, and the reliability and the sample collection rate of the structure can be considered.

And thirdly, a heat preservation and pressure maintaining technology of the pore fluid sampling container is innovated, the pore fluid sample in the sampling container is less influenced by the external environment pressure and temperature change, the sample stability is good, the collection quality is high, and the original information of the pore fluid can be furthest preserved.

And fourthly, the modular sampler structure is innovated, the processing procedure is simplified, the production efficiency is improved, the sampler is easy to disassemble and assemble, convenient to arrange and maintain, high in reliability and long in service life, the length of the sampler can be prolonged or shortened on site according to actual sampling requirements, the sampler does not need to be reprocessed and reformed, and the environment adaptability is strong.

Fifthly, opening and closing of the pore fluid sampling containers are controlled by the innovative Bluetooth communication technology, each sampling container does not need to be connected through a cable, the overall pressure-resistant and corrosion-resistant requirements of the sampler are reduced, the volume is small, integration is easy, the response speed is high, the power consumption is extremely low, the electric quantity requirements of long-period sampling can be met, and the service life is long.

The pore fluid sampler is integrally of a modular structure, and the length of the sampler can be lengthened by connecting the hollow sleeve and the connecting piece according to the sampling depth. The hollow sleeve has a simple structure, the length of the sleeve can be customized according to actual needs, and the process flow is very simple.

Drawings

FIG. 1 is a schematic diagram of the general structure of a modular multilevel time-series deep sea sediment pore fluid sampler in the invention.

FIG. 2 is a schematic diagram of the sampler of the present invention penetrating the seabed for collection.

Fig. 3 is a front view of fig. 1.

Fig. 4 is a top view of the protective frame of the present invention.

Fig. 5 is a perspective view of fig. 4.

FIG. 6 is a schematic view of the connection structure of the base and the sampling bottle of the present invention.

Fig. 7 is a schematic structural view of the connector of the present invention.

Fig. 8 is a schematic view of the installation structure between the connector and the sampling bottle in the present invention.

FIG. 9 is a schematic view of the connection of the connector, the cannula and the sampling bottle of the present invention.

Fig. 10 is a schematic view of the structure of the tapered tip of the present invention.

FIG. 11 is a schematic view of the mounting structure of the conical tip and the sample bottle of the present invention.

FIG. 12 is a schematic view of a sample bottle according to the present invention.

Fig. 13 is a cross-sectional view of fig. 12.

Fig. 14 is a bottom view at a in fig. 12.

Fig. 15 is a schematic structural view of a control valve according to the present invention.

Fig. 16 is a schematic diagram of the control valve control of the present invention.

FIG. 17 is a diagram of the process of collecting void fluid in a sample bottle of the present invention.

FIG. 18 is a diagram of the process of releasing pore fluid from a sample bottle of the present invention.

Shown in the figure:

1. a sleeve, 2, a conical tip, 3, a connecting piece, 4, a sedimentation prevention baffle, 5, a watertight connector, 6, a support rod, 7, a base metal filter, 8, a lifting ring, 9, a base, 10, an upper support plate, 11, a lower support plate, 12, a fastening screw, 13, a sampling bottle, 14, a piston release part, 15, a cylindrical body, 16, an annular boss, 17, a pore fluid channel, 18, a signal transmission channel, 19, a fixing channel, 20, an O-shaped rubber ring mounting groove, 21, a screw hole, 22, a lead interface, 23, a tip pore fluid channel, 24, a tip signal transmission channel, 25, a tip fixing channel, 26, a tip, 27, a thread structure, 28, a bulge, 29, a limiting rod, 30, a release hole, 31, a Bluetooth control module, 32, a main telescopic rod, 33, a spring, 34, an auxiliary telescopic rod, 35, a lithium battery, 36, an electromagnetic coil, 37. iron block, 38, lower housing channel, 39, upper housing channel, 40, housing, 41, plastic housing, 42, piston, 43, opening, 44, flow passage, 45, second piston flow passage, 46, first piston flow passage, 47, sealing piston, 48, T-shaped aperture flow passage, 49, connecting part.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Example 1:

the utility model provides a multilayer time sequence deep sea deposit pore fluid sample thief of modularization, include the injection probe rod that is formed by sleeve pipe 1 through the vertical concatenation of connecting piece 3, sleeve pipe 1 is hollow stainless steel sleeve pipe, establish ties through connecting piece 3, connect through fastening screw 12 by connecting piece 3 between every two adjacent sleeve pipes 1, both sides junction is provided with double-deck water proof O type rubber circle through O type rubber circle mounting groove 20 about connecting piece 3, guarantee that pore fluid can only get into inside the sample thief from metal filter department. The length of the sampler can be lengthened by connecting the hollow sleeve and the connecting piece according to the sampling depth.

The penetration probe rod is provided with a sealed pressure-resistant bin which is internally provided with a master control system at the top in a sleeve 1 at the uppermost end, two watertight connectors 5 which are electrically connected with the master control system are embedded in the top surface of the pressure-resistant bin, a connecting piece 3 comprises a cylindrical body 15 which is used for being connected with the sleeve 1 and an annular boss 16 which is convexly arranged in the middle of the cylindrical body 15, a through signal transmission channel 18 is arranged in the center of the cylindrical body 15, a pore fluid channel 17 which penetrates through the upper surface and the lower surface of the cylindrical body 15 is arranged in the circumferential direction of the signal transmission channel 18 in the cylindrical body 15, the upper end and the lower end of the pore fluid channel 17 are respectively in threaded connection with an open sampling bottle 13, a fixed channel 19 which is communicated with the pore fluid channel 17 is arranged on the annular boss 16, a control valve is arranged in the fixed channel 19, a metal filter is embedded in the opening of the fixed channel 19 in the annular boss 16, and a single-layer water-resisting O-type rubber ring is arranged at the joint of the metal filter and the hollow stainless steel sleeve 1 at the upper side and the lower side, the control valve inside the sampler connector can only be accessed from the metal filter, and the wire interface 22 of the control valve is arranged in the signal transmission channel 18 and is electrically connected with the master control system through a wire.

The center of the sampler connecting piece 3 is a control signal transmission channel 18, the upper and lower surfaces of the cylindrical body 15 are respectively provided with five pore fluid channels 17, the two ends of the channels are provided with threaded openings which are used as mounting bases of the collecting container and are respectively connected to the sampling bottles 13, in the invention, the base 9, the connecting piece 3 and the filter on the conical tip 2 are all metal filters, and the filter is a filter element structure formed by sintering 316L stainless steel powder at a high temperature, and the filter has the characteristics of high mechanical strength, high temperature resistance, corrosion resistance and uniform pore diameter, and can enable pore fluid to permeate and sediment particles to be blocked outside.

In this embodiment, five sampling bottles 13 can be fixedly installed on the upper portion of each connecting piece 3, five sampling bottles 13 can also be fixedly installed on the lower portion of each connecting piece 3, five control valves are installed inside each connecting piece 3, the control valves are used for controlling the closing of the sampling bottles 13, pore fluid inside submarine sediments is driven by external super-pore pressure to enter the sampling bottles 13 through the closing of the sampling bottles 13, so that sampling is completed, each control valve can control the pore fluid sample collection of the upper sampling bottle 13 and the lower sampling bottle 13 in the same direction, and each sampler connecting piece and the ten fixed sampling bottles 13 form a connecting piece pore fluid collection container group.

The pressure-resistant storehouse of sample thief is complete water-proof seal structure, and inside the direct nested entering hollow sleeve 1 of the outside casing of pressure-resistant storehouse, pressure-resistant storehouse upper portion casing passed through the stainless steel screw and is connected with injection body of rod sleeve 1, and the pressure-resistant storehouse of sample thief is provided with double-deck water-proof O type rubber circle with sleeve 1 junction, guarantees that the sample thief penetrates into that the body of rod is inside to be complete water-proof seal structure. Two watertight connectors 5 are mounted at the top end of the pressure-resistant bin of the sampler, and one watertight connector 5 is connected to five watertight connectors of the control valves of the offshore bottom seawater collection container group through one-to-five joints and is used for signal control communication between the control valves and a pressure-resistant bin master control system; the other watertight connector 5 can be connected with an external computer through a communication cable and is used for data communication between the sampler and the external computer and electric quantity supplement of the rechargeable lithium battery pack in the pressure-resistant cabin.

The sampler withstand voltage storehouse internally mounted has bluetooth control module, chargeable lithium cell group, total control system. The Bluetooth control module is connected with the master control system, and the master control system sends control signals to the control valves of the acquisition containers through the Bluetooth control module; the 12V rechargeable lithium battery pack is connected with the master control system and the Bluetooth control module and supplies electricity for the master control system and the Bluetooth control module, and the rechargeable lithium battery pack is connected with the water tight plug-in at the top end of the pressure-resistant bin of the sampler through a power supply cable and used for charging the lithium battery pack by an external power supply.

The main control system body part comprises an ARM microcontroller and a 256G high-speed data storage SD card, the main control system sends a total control command through each acquisition container control valve of the ARM processor, and system information is stored through the data storage SD card; the power supply cable and the communication cable of the master control system are respectively connected to the rechargeable lithium battery pack and the Bluetooth control module inside the pressure-resistant bin of the sampler. The master control system implements bidirectional data communication through an RS232 interface between the communication cable and the Bluetooth control module: on one hand, the master control system can send control commands to the control valves of the acquisition containers, and on the other hand, the master control system can receive working state information fed back by the control valves of the acquisition containers.

Penetrate into the top of probe rod and be connected with protection frame, protection frame includes supporting disk 10 and lower supporting disk 11, connect through bracing piece 6 between two supporting disks, go up and still be fixed with rings 8 on the supporting disk 10, it installs base 9 to go up the embedding in supporting disk 10, set up the passageway that runs through the base on the base 9, filter 7 is installed on passageway upper portion to base 9, base 9 has open sampling bottle 13 at passageway lower part threaded connection, install control flap between filter 7 and the 13 opening end of sampling bottle in the passageway of base 9, the watertight connector who is connected with the control flap electricity is installed to the base 9 bottom surface.

In this embodiment, four sets of offshore bottom seawater collecting container sets are mounted on the upper supporting tray 10 and located inside the protection frame, and are used for collecting offshore bottom seawater samples; every coastal waters bottom sea water of group gathers container group and includes five sampling bottles 13, and every sampling bottle 13 passes through the screw thread mouth and installs in base 9 lower part, and filter 7 UNICOM external sea water is passed through on base 9 upper portion, and between every sampling bottle 13 of base 9 inside and filter 7, install control flap respectively for the closure of control coastal waters bottom sea water gathers container group and gathers the container, by inside external hydrostatic pressure drive bottom sea water gets into the sampling bottle, thereby accomplishes the sampling.

The lower part of a base 9 of each offshore bottom seawater collection container group is provided with a watertight connector in the center of each of five sampling bottles 13, and a control valve inside the base 9 is connected with a watertight connector 5 of a pressure-resistant bin of a sampler through the watertight connector and is used for signal control communication between the control valve and a pressure-resistant bin master control system.

The top sleeve 1 of the penetration probe is provided with an inverted-cone-shaped anti-sedimentation baffle 4 which is sleeved on the sleeve 1 below the lower supporting disc 11 and is used for preventing the sampler from over-sedimentation caused by the self weight of the sampler after the submarine arrangement of the sampler is finished, so that the field arrangement effect and the quality of the collected sample are influenced; the anti-settling baffle 4 is a conical stainless steel shell, is directly embedded into the outside of the penetrating rod body of the sampler, and the upper part of the anti-settling baffle 4 is fixedly connected with the upper part protection frame through screw fastening.

The bottom of the penetration probe rod in the casing 1 at the lowest end is connected with a conical tip 2, and a double-layer water-proof O-shaped rubber ring is used for ensuring that pore fluid can only enter the sampler from the metal filter. The conical tip 2 comprises a conical tip 26 at the lower part and a connecting part 49 which is positioned at the upper part and is integrally formed with the conical tip 26, the center of the connecting part 49 is provided with a tip signal transmission channel 24 communicated with the sleeve 1, the connecting part 49 is vertically provided with five tip pore fluid channels 23 in the circumferential direction of the tip signal transmission channel 24, and the upper end threaded connection of every most advanced pore fluid passageway 23 is located sleeve pipe 1 and open sampling bottle 13, set up most advanced fixed passage 25 with the intercommunication of most advanced pore fluid passageway 24 on connecting portion 49 global, install control valve and connecting portion 49 and establish at most advanced fixed passage 25 mouthful global cover and install annular metal filter in most advanced fixed passage 25, metal filter and the hollow stainless steel sleeve pipe 1 of upside and the conical point 26 junction of downside are provided with the water proof O type rubber circle of individual layer, guarantee that pore fluid can only follow metal filter and get into the inside control valve of sample thief conical point. The wire interface of the control valve is arranged in the tip signal transmission channel 24 and is electrically connected with the master control system through a wire. The control valve inside the conical tip of the sampling bottle 12 is used for controlling the closing of the sampling container, pore fluid inside seabed sediments is driven to enter the sampling bottle by the external over-pore pressure through the closing of the sampling bottle, so that sampling is completed, each control valve can control the pore fluid sample collection of the upper sampling bottle 13, and the conical tip of each sampler and five sampling bottles 13 fixedly installed form a conical tip pore fluid collecting container group.

The control valve comprises a shell 40 which is wrapped by ABS plastic 41 of waterproof rubber, a sliding cavity is arranged in the shell 40 along the length direction of a fixed channel, a piston 42 is connected in the sliding cavity in a sliding mode, an opening 43 which is right opposite to a metal filter is formed in one end of the sliding cavity, an electromagnetic driving mechanism which is connected with the piston 42 is arranged at one end, close to a signal transmission channel, in the sliding cavity, 42 in the piston, a flow channel 44 is formed in the length direction of the fixed channel, a flow channel inlet is formed in one side of the opening 43 of the sliding cavity, a penetrating upper shell channel 39 and a penetrating lower shell channel 38 are formed in the upper surface and the lower surface of the shell 40 respectively, and a first piston channel 46 which can be communicated with the upper shell channel 39 and a second piston channel 45 which can be communicated with the lower shell channel 38 are formed in the upper side and the lower side of the flow channel respectively.

The electromagnetic driving mechanism comprises a Bluetooth control module 31 arranged in the sliding cavity, an electromagnetic coil 36 and a lithium battery 35 used for supplying power, a telescopic rod extending to the piston is fixed on the axis of the electromagnetic coil 36, the end part of the telescopic rod is fixedly connected with the piston 42 through an iron block 37, and a spring 33 is sleeved on the telescopic rod between the electromagnetic coil 36 and the piston 42. In this embodiment, the telescopic rods include a main telescopic rod 32 and an auxiliary telescopic rod 34, the auxiliary telescopic rod 34 can be extended and retracted into the main telescopic rod 32, and the main telescopic rod 32 serves the purpose of accommodating the auxiliary telescopic rod 34 on one hand and serves the function of limiting the movement position of the iron block 37 on the other hand.

The power supply cable of the Bluetooth control module 31 is connected to the lithium battery 35, the control cable of the lithium battery 35 is connected to the electromagnetic coil 36, and the control end of the Bluetooth control module 31 is electrically connected with the master control system through a wire interface.

The power supply cable of the electromagnetic coil 36 is connected to the lithium battery 35 inside the control valve, the electromagnetic coil 36 can generate magnetic force after being electrified, the power supply or the power failure of the lithium battery 35 to the electromagnetic coil 36 is changed through the Bluetooth control module 31, so that the effect that the electromagnetic coil 36 attracts an iron block or does not attract the iron block 37 is changed, the iron block 37 drives the piston 42 to move, the spring 33 is stretched or compressed, the pore fluid channel inside the control piston 42 is opened or closed to sampling bottles in different directions, and pore fluid is guided to enter different sampling bottles 13.

One end of the sampling bottle 13 is of a threaded structure 27 and can be matched and fixedly installed with the sampler connecting piece 3, and a single-layer waterproof O-shaped rubber ring is arranged at the joint; the outside of sampling bottle 13 is 316L stainless steel shell, and inside is double glazing insulating layer, and the silvering on glass surface is used for isolated thermal radiation, evacuation between the two-layer glass to destroy heat convection conduction, reach heat retaining purpose.

Sampling bottle 13 sets up the passageway and is provided with sealed piston 47 in the passageway activity at the other end relative with the opening end, sealed piston 47 is connected with the piston release portion 14 that sets up at this terminal surface of sampling bottle 13, it is the hole runner 48 of T type to have seted up the cross-section in the piston release portion 14, the opening has all been seted up on piston release portion 14 at the T type both ends of hole runner, release mouth 30 has been seted up in piston release portion 14's bottom to the T type bottom of hole runner, collection bottle 13 is fixed with stopper rod 29 in one side vertical fixation of piston release portion 14, be fixed with bellying 28 on the piston release portion 14, and set up the spacing through-hole that supplies stopper rod 29 to pass on the bellying 28.

The piston release part 14 is used for guiding out the collected pore fluid sample, and a sealing piston 47 connected with the piston release part 14 is directly nested into the bottom of the pore fluid sampling bottle 13, can extend and retract towards the interior of the pore fluid collection container and can rotate along the central axis of the pore fluid collection container; the sealing piston 47 is a sealed, water-tight and heat-proof material, and is internally provided with a T-shaped pore flow channel 48 for guiding pore fluid in the pore fluid collection container to the external sample container. After the limiting through hole on the boss 28 of the piston releasing part 14 rotates to the position aligned with the limiting rod 29, the piston releasing part 14 can be pushed towards the inside of the sampling bottle 13, at the moment, the T-shaped pore flow channel 48 on the sealing piston 47 is communicated with the inside of the sampling bottle 13, and the pore fluid in the pore fluid sampling bottle can be discharged from the releasing hole 30; when the limiting through hole of the piston releasing part 14 is not rotated to the position aligned with the limiting rod 29, the piston releasing part 14 cannot be retracted into the pore fluid sampling bottle 13, and at this time, the sealing piston 47 is closed, and the pore fluid in the pore fluid sampling bottle 13 cannot be discharged.

Example 2:

a sampling method using a modular multilevel time series deep sea sediment pore fluid sampler, comprising the steps of:

s1, one end of a one-to-two data communication cable is connected with a watertight connector of the pressure-resistant cabin, the other end of the one-to-two data communication cable is connected with an external computer upper computer and an external power supply through a USB interface and a power supply interface respectively, the master control system is awakened through the external computer upper computer, system state information is checked, equipment is charged through the external power supply, the working state of each control valve is debugged, the working parameters and the collection frequency of each control valve are set, the time sequence for collecting pore fluid is set, the spring inside the pore fluid controller is in a normal state at the moment, and the pore fluid cannot reach a pore fluid sampling bottle. After the setting is finished, disconnecting the external cable, and sealing the watertight connector by using a watertight connector cap; piston release 14 of adjustment pore fluid sampling bottle 13 lower part, make spacing through-hole rotatory to with gag lever post 29 align the position after, with piston release 14 push into sampling bottle 13 in, sealed piston 47 is opened this moment, use interior pump type vacuum machine to connect the release hole and take out inside air, extract piston release 14 to the outside after accomplishing, sealed piston 47 closes this moment, make spacing through-hole and gag lever post 29 be in the dislocation state, pore fluid sampling bottle 13 is the vacuum negative pressure state this moment, accomplish total control system setting this moment, pore fluid sampling bottle can lay.

S2, the deep sea sediment pore fluid sampler can perform seabed penetration distribution in various modes such as static penetration and dynamic penetration, and seabed sampling is performed according to a set sampling frequency after the seabed penetration distribution is completed; after the assembly of the pore fluid sampler and the penetration device on the deck is finished, the shipborne geological cable is used for hoisting the water. At this time, the spring 33 inside the control valve is in a normal state, and the pore fluid passage of the pore fluid sampling bottle 13 is in a closed state. After the pore fluid sampler enters water, seawater enters from the filter penetrating into the rod body and finally fills the pore fluid channel of the connecting piece.

S3, after the pore fluid sampler is completely penetrated, the penetrating rod body is positioned inside the submarine sediment, the upper protective frame is positioned above the sea bottom surface, and the anti-settling baffle 4 is tightly attached to the sea bottom surface. When reaching the predetermined acquisition time, total control system sends control command to control valve through bluetooth control module, control valve's bluetooth control module receives communication signal after, send control command to the inside lithium cell package of control valve, the lithium cell package is to the inside solenoid 36 power supply of control valve, solenoid 36 can produce magnetic force after the circular telegram, attract iron plate 37, thereby drive piston 42 motion, make spring 33 compression or tensile, the inside pore fluid collection container end pore fluid passageway of the injection body of rod this moment is in the open mode. Due to the large differential pressure driving effect between the negative pressure pre-established inside the pore fluid sampling bottle and the pore fluid's super-pore pressure, and the hydrostatic pressure of the upper seawater, the pore fluid inside the seafloor sediment and the sub-sea bottom seawater are drawn into the pore fluid sampling bottle 13. After 10-15 minutes the sample collection is complete, at which point the pressure equilibrates between the interior of the pore fluid sampling bottle and the super-pore pressure of the pore fluid, as well as the hydrostatic pressure of the upper seawater. The total control system passes through bluetooth control module and sends control command to control valve, control valve's bluetooth control module receives communication signal after, send control command to the inside lithium cell of control valve, the lithium cell stops to the inside solenoid 36 power supply of control valve, solenoid 36 stops magnetic force disappearance after the circular telegram, spring 33 drives piston 42 and resets, the inside pore fluid sampling bottle pore fluid passageway of the body of rod of penetrating this moment is in the encapsulated situation, reach the purpose of pressurize. The pore fluid collecting container can separately set collecting time according to needs, and finally, the purpose of collecting pore fluid in time series is achieved.

S4, after the pore fluid sampler completes a seabed sampling task, the connection between the shipborne geological cable and the pore fluid sampler is finally completed in a way that the ROV underwater robot dives the auxiliary hook, and the pore fluid sampler is pulled up and recovered through the shipborne geological cable. After recovery of the pore fluid sampler is complete, the sealing piston 47 is opened and the collected pore fluid sample is recovered using the sample bottle 13. One end of a one-to-two data communication cable is connected with a watertight connector of the pressure-resistant cabin, the other end of the one-to-two data communication cable is connected with an external computer upper computer and an external power supply through a USB interface and a power supply interface respectively, the master control system is awakened through the external computer upper computer, system state information is checked, the working states of all control valves are debugged, and system working logs are downloaded.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.

Claims (10)

1. A modularized multi-level time sequence deep sea sediment pore fluid sampler is characterized in that: comprises a penetration probe rod formed by vertically splicing sleeves through a connecting piece, wherein the top of the penetration probe rod in the uppermost sleeve is provided with a sealed pressure-resistant bin, the interior of the pressure-resistant bin is provided with a master control system, the top surface of the pressure-resistant bin is embedded with two watertight connectors electrically connected with the master control system, the connecting piece comprises a cylindrical body connected with the sleeves and an annular boss convexly arranged at the middle part of the cylindrical body, a penetrating signal transmission channel is arranged at the center of the cylindrical body, and a pore fluid channel penetrating through the upper surface and the lower surface of the cylindrical body is arranged on the cylindrical body in the circumferential direction of the signal transmission channel, and the upper end and the lower end of the pore fluid channel are respectively in threaded connection with an open sampling bottle, a fixed channel communicated with the pore fluid channel is arranged on the annular boss, a control valve is arranged in the fixed channel, a metal filter is arranged at the opening of the fixed channel by the annular boss, and a wire interface of the control valve is arranged in the signal transmission channel and is electrically connected with a master control system through a wire.

2. The modular multilevel time series deep sea sediment pore fluid sampler of claim 1, wherein: the top that penetrates into the probe rod is connected with protective frame, protective frame includes supporting disk and under bracing dish, connect through the bracing piece between two supporting disks, go up still be fixed with rings on the supporting disk, go up the embedding in the supporting disk and install the base, set up the passageway that runs through the base on the base, the filter is installed on passageway upper portion to the base, the base has open sampling bottle at passageway lower part threaded connection, install control flap between the inherent filter of passageway of base and the sampling bottle opening end, the watertight connector who is connected with the control flap electricity is installed to the base bottom surface.

3. The modular multilevel time series deep sea sediment pore fluid sampler of claim 1, wherein: the bottom of the casing pipe of the lowest end of the injection probe rod is connected with a conical tip, the conical tip comprises a conical tip at the lower part and a connecting part which is positioned on the upper part and is integrally formed with the conical tip, a tip signal transmission channel communicated with the casing pipe is arranged at the center of the connecting part, a tip pore fluid channel is vertically arranged on the connecting part in the circumferential direction of the tip signal transmission channel, an upper end thread of the tip pore fluid channel is connected with an open sampling bottle in the casing pipe, a tip fixing channel communicated with the tip pore fluid channel is arranged on the circumferential surface of the connecting part, a control valve is arranged in the tip fixing channel, a metal filter is arranged at a tip fixing channel port of the connecting part, and a lead interface of the control valve is arranged in the tip signal transmission channel and is electrically connected with a master control system through a lead.

4. The modular multilevel time series deep sea sediment pore fluid sampler of claim 1, 2 or 3, wherein: control flap includes the shell, be provided with the sliding chamber and have the piston at sliding chamber sliding connection along fixed passage length direction in the shell, sliding chamber one end is seted up the opening just right with metal filter, the one end that is close to signal transmission passageway in the sliding chamber is provided with the electromagnetic drive mechanism with piston connection, the runner has been seted up at the piston middle part along fixed passage length direction and the runner sets up the runner entry in sliding chamber opening one side, the last shell passageway and the lower shell passageway that run through are seted up respectively on the surface just to the pore fluid passageway on the two sides about the shell, the piston is seted up respectively in the top of runner and below can with the first piston passageway of last shell passageway intercommunication and can with the second piston passageway of lower shell passageway intercommunication.

5. The modular multilevel time series deep sea sediment pore fluid sampler of claim 4, wherein: the electromagnetic driving mechanism comprises a Bluetooth control module, an electromagnetic coil and a lithium battery, wherein the Bluetooth control module and the electromagnetic coil are arranged in a sliding cavity, the lithium battery is used for supplying power, a telescopic rod extending to a piston is fixed on an electromagnetic coil axis, the end part of the telescopic rod is fixedly connected with the piston through an iron block, and a spring is sleeved on the telescopic rod between the electromagnetic coil and the piston.

6. The modular multilevel time series deep sea sediment pore fluid sampler of claim 5, wherein: the power supply cable of the Bluetooth control module is connected to the lithium battery, the control cable of the lithium battery is connected to the electromagnetic coil, and the control end of the Bluetooth control module is electrically connected with the master control system through the wire interface.

7. The modular multilevel time series deep sea sediment pore fluid sampler of claim 1, 2 or 3, wherein: the passageway is seted up and the sealed piston is provided with in the passageway internalization to the other end that the sampling bottle is relative with the opening end, sealed piston connection has the piston release portion of setting at this terminal surface of sampling bottle, the hole runner that the cross-section is the T type has been seted up in the piston release portion, the opening has all been seted up at the T type both ends of hole runner in piston release portion, the release mouth has been seted up in piston release switch's bottom to the T type bottom of hole runner, the collection bottle is at one side vertical fixation of piston release portion with the gag lever post, be fixed with the bellying in the piston release portion, and set up the spacing through-hole that supplies the gag lever post to pass on the bellying.

8. The modular multilevel time series deep sea sediment pore fluid sampler of claim 1 or 2, characterized in that: the top of the penetration probe rod is provided with an anti-settling baffle which is sleeved on the sleeve and is in an inverted cone shape.

9. A sampling method using the modular multilevel time series deep sea sediment pore fluid sampler of claim 1, characterized in that: the method comprises the following steps:

s1, connecting the watertight connector on the pressure-resistant bin to an upper computer through a communication cable to wake up a master control system, setting the working parameters of each control valve, the acquisition frequency and the time sequence of pore fluid acquisition, disconnecting the communication cable after the setting is finished, sealing the watertight connector, and vacuumizing an acquisition bottle;

s2, arranging a sampler, wherein after the sampler enters water, seawater enters the penetration probe rod from the metal filter to fill the pore fluid channel of the connecting piece, and sampling the seabed according to the set sampling frequency;

s3, after the sampler penetrates into the submarine sediment, when the preset acquisition time is reached, the master control system sends a control command to the control valve through the Bluetooth control module, the lithium battery pack supplies power to the electromagnetic coil, the electromagnetic coil generates magnetic force after being electrified, the piston is driven to move by attracting or repelling the permanent magnet, the sampling bottle is communicated with the pore fluid channel, the pore fluid in the submarine sediment and the seawater on the bottom layer of the offshore bottom are attracted to enter the sampling bottle, after the sample collection is completed, the master control system controls the electromagnetic coil to be powered off, the spring drives the piston to reset, the sampling bottle and the pore fluid channel are closed, the sampling bottle sets the acquisition time respectively and acquires the pore fluid in a time sequence;

s4, after the sampler completes a submarine sampling task, the connection between the shipborne geological cable and the top hanging ring of the pore fluid sampler is completed in a way that the ROV underwater robot dives the auxiliary hook, and the pore fluid sampler is pulled up and recovered through the shipborne geological cable.

10. The method for sampling a modular multilevel time-series deep sea sediment pore fluid sampler as claimed in claim 9, wherein the method comprises the following steps: and after the recovery of the pore fluid sampler is finished, opening the sealing piston by adjusting a piston release part at one end of the sampling bottle, and recovering the pore fluid sample in the sampling bottle.

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