Deep sea pore water circulation collection device and method

Abstract

The invention relates to the technical field of deep sea pore water detection, and discloses a deep sea pore water circulation collecting device which comprises a GNSS module, a floating body, a control cabin, a release module, a supporting column, a temperature sensor, a pore water circulation collecting cabin and a pointed end. The GNSS module is fixedly connected to the upper portion of the floating body, the floating body is fixedly connected to the upper portion of the control cabin, and the control cabin is fixedly connected to the lower portion of the pointed end; the control cabin is fixedly connected to the upper portion of the release module, the release module is connected to the upper portion of the supporting column, the temperature sensor is fixed to the side face of the supporting column, the pore water circulation collecting cabin is fixedly connected to the lower portion of the supporting column, and the tip is fixedly connected to the lower portion of the pore water circulation collecting cabin. A control circuit and the like are arranged in the control cabin; according to the device, in-situ circulating collection and detection of the sediment pore water are realized, the system can realize automatic recovery, and a technical basis is provided for in-situ measurement of the sediment pore water.

Description

Technical Field

[0001] The present invention relates to the technical field of deep - sea pore water detection, and particularly relates to a deep - sea pore water circulation collection device and method. Background Art

[0002] In the exploration of natural gas hydrates and in - situ monitoring of the seabed environment, the observation of the properties of pore water in seabed sediments plays a crucial role. In areas rich in natural gas hydrates, the Cl — and SO4 2— ion contents in the pore water of seabed sediments are bound to be different from those in other areas. In the prior art, there are two methods for collecting pore water: the first is non - in - situ pore water collection, that is, first collecting sediments, and then collecting pore water in the laboratory through means such as pressing, centrifuging, and vacuum filtration extraction. Since the collection process will cause the escape of dissolved gases, decomposition of organic components, and oxidation of variable - valence ions in the pore water, it is difficult for this method to fully reflect the original composition and information of the pore water, especially the information of dissolved gases will be completely lost; the second is in - situ pore water collection. The geochemical characteristics of the pore water collected by this method are more real. However, due to the complex deep - sea seabed environment with problems such as pressure and corrosion, it is difficult to collect in - situ sediment pore water, and long - term, multiple - cycle collection and detection cannot be achieved, resulting in a relatively high detection cost for pore water - related indicators. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a deep - sea pore water circulation collection device and method, which can achieve long - term and multiple - cycle collection and detection of deep - sea pore water.

[0004] To achieve the above object, the present invention provides the following technical solutions: A deep-sea pore water circulation collection device, comprising: a GNSS module, a floating body, a control cabin, a release module, a support column, a temperature sensor, a pore water circulation collection cabin and a pointed tip. The GNSS module is fixedly connected above the floating body, the floating body is fixedly connected above the control cabin, the control cabin is fixedly connected above the release module, the release module is connected above the support column, the temperature sensor is fixed on the side of the support column, the pore water circulation collection cabin is fixedly connected below the support column, and the pointed tip is fixedly connected below the pore water circulation collection cabin; a control circuit is arranged inside the control cabin, and the GNSS module, the release module, the temperature sensor, and the pore water circulation collection cabin are respectively electrically connected to the control circuit; the GNSS module is used to send positioning information back to the ground receiving station, the floating body is used to provide the buoyancy required for the control cabin to float, the control cabin is used to complete the control of the system timing, pore water circulation collection, and parameter measurement of the deep-sea pore water circulation collection device, the release module is used to separate the control cabin from the support column, the temperature sensor is used to measure the temperature, and the pore water circulation collection cabin is used to complete the cyclic collection of sediment pore water.

[0005] In the present invention, preferably, a water sampler, a water collection cabin, a water pump, a first solenoid valve, a second solenoid valve and a filter are arranged inside the pore water circulation collection cabin. The filter is fixed on the side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin; the first solenoid valve is connected to the filter, the water sampler is connected to the first solenoid valve, and a multi-parameter sensor is arranged inside the water sampler for measuring the ion content in the pore water; the input end of the water pump is connected to the water sampler, the output end of the water pump is connected to the second solenoid valve, and the second solenoid valve is connected to the water collection cabin; the water pump, the first solenoid valve, the second solenoid valve and the multi-parameter sensor are all electrically connected to the control circuit.

[0006] In the present invention, preferably, a water sampler, a water pump, a first solenoid valve, a second solenoid valve and a filter are arranged inside the pore water circulation collection cabin. The filter is fixed on the side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin; the first solenoid valve is connected to the filter, the water sampler is connected to the first solenoid valve, and a multi-parameter sensor is arranged inside the water sampler for measuring the ion content in the pore water; the input end of the water pump is connected to the water sampler, the output end of the water pump is connected to the second solenoid valve, and the water pump adopts a high-pressure pump; the second solenoid valve is fixed on the top side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin; the water pump, the first solenoid valve, the second solenoid valve and the multi-parameter sensor are all electrically connected to the control circuit.

[0007] In the present invention, preferably, the filter element of the filter uses a stainless steel fiber sintered felt as the support layer, the surface of the support layer is covered with two layers of microporous filter membranes, and the surface layer of the filter is a stainless steel screen protection layer.

[0008] In the present invention, preferably, the control circuit includes a CPU, an external memory, a clock chip, and a power supply module. The power supply module is used to supply power to the control circuit, and the CPU is electrically connected to the external memory and the clock chip respectively.

[0009] In the present invention, preferably, the CPU is electrically connected to the GNSS module, the temperature sensor, the water pump, the first solenoid valve, the second solenoid valve, and the multi-parameter sensor respectively through the RS-232 interface, is electrically connected to the release module through the I / O interface, is electrically connected to the clock chip through the I2C interface, and is electrically connected to the external memory through the SPI interface.

[0010] In the present invention, preferably, the release module realizes release by means of electrochemical corrosion.

[0011] In the present invention, preferably, the floating body is made of glass microsphere material and is coated with a polyurea coating.

[0012] A deep-sea pore water circulation collection method uses the aforementioned deep-sea pore water circulation collection device provided with a water collection chamber, and includes: S1, evacuating the water sampler, the water collection chamber, and the water pump; S2, setting parameters for the control circuit; S3, deploying the deep-sea pore water circulation collection device into the sea through the connection of the ship's winch cable, and the deep-sea pore water circulation collection device penetrates into the seabed sediment by its own weight; S4, starting the deep-sea pore water circulation collection device according to a predetermined time sequence; S5, the control circuit controls the first solenoid valve to open, and uses the hydrostatic pressure difference inside and outside the water sampler to make the pore water of the sediment enter the water sampler through the filter; S6, the control circuit controls the first solenoid valve to lock, and uses the multi-parameter sensor to measure parameters; S7, the control circuit controls the second solenoid valve to open, and the control circuit controls the water pump to drain the pore water in the water sampler into the water collection chamber; S8, standby waiting for the next cycle of collection and detection, and the actions of S5 to S7 are performed for each cycle of collection and detection; S9, after all detection tasks are completed, the control cabin is released according to a predetermined time sequence, and the control cabin floats to the water surface under the drive of the floating body, and is positioned through the GNSS module and waits to be recovered.

[0013] A deep-sea porous water circulation collection method, using the aforementioned deep-sea porous water circulation collection device without a water collection chamber and using a high-pressure pump as a water delivery pump, comprising: S1, vacuuming a water sampler and a water delivery pump; S2, setting parameters of a control circuit; S3, placing the deep-sea porous water circulation collection device into the sea through a winch cable connection on board, and the deep-sea porous water circulation collection device penetrates into the seabed sediment by its own weight; S4, the deep-sea porous water circulation collection device is started according to a predetermined timing; S5, the control circuit controls the first solenoid valve to open, and uses the hydrostatic pressure difference inside and outside the water sampler to make the sediment The pore water enters the water sampler through the filter; S6, the control circuit controls the first solenoid valve to lock, and uses the multi-parameter sensor to measure the parameters; S7, the control circuit controls the second solenoid valve to open, and the control circuit controls the water pump to discharge the pore water in the water sampler to the outside of the deep-sea pore water circulation collection device; S8, wait for the next cycle of collection and detection, and each cycle of collection and detection performs actions from S5 to S7; S9, after all detection tasks are completed, the control cabin is released according to the predetermined timing, and the control cabin floats to the surface of the water driven by the float, is positioned by the GNSS module, and waits for recovery.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The deep-sea pore water circulation collection device of the present invention uses filter pressing and dialysis to complete single pore water collection, and then transfers pore water through water transfer pumps, solenoid valves, water collection chambers and other devices under the control of the control cabin, thereby realizing the automatic collection of sediment pore water circulation; the control cabin uses the electrochemical corrosion of seawater to release the control cabin through the breakage of the steel wire, and then the control cabin floats to the water surface driven by the float to complete the self-return. The present invention breaks through the sediment pore water circulation collection technology, realizes the in-situ circulation collection and detection of sediment pore water, and the system can realize automatic recovery, providing a technical basis for the in-situ measurement of sediment pore water, and thus provides a new technical means for geochemical detection and related scientific research. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a deep-sea pore water circulation collection device according to an embodiment of the present invention.

[0016] Figure 2 The figure is a schematic diagram of the internal structure of a pore water circulation collection chamber in a deep sea pore water circulation collection device according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure of a pore water circulation collection chamber in a deep-sea pore water circulation collection device according to another embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of a control circuit in a deep-sea pore water circulation collection device according to another embodiment of the present invention.

[0019] Figure 5 This is a flowchart of the deep - sea pore water circulation collection method according to another embodiment of the present invention.

[0020] Figure 6 This is a flowchart of the deep - sea pore water circulation collection method according to another embodiment of the present invention.

[0021] In the attached drawings: 1. GNSS module; 2. Floating body; 3. Control cabin; 301. CPU; 302. External memory; 303. Clock chip; 304. Power module; 4. Release module; 5. Support column; 6. Temperature sensor; 7. Pore water circulation collection cabin; 701. Water sampler; 702. Water transfer pump; 703. First solenoid valve; 704. Second solenoid valve; 705. Filter; 706. Water collection cabin; 8. Tip. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figure 1 , a preferred embodiment of the present invention provides a deep - sea pore water circulation collection device, including: GNSS module 1, floating body 2, control cabin 3, release module 4, support column 5, temperature sensor 6, pore water circulation collection cabin 7 and tip 8.

[0026] The GNSS module 1 is fixedly connected above the floating body 2. The main function of the GNSS module 1 is to float to the water surface with the control cabin 3 after completing the measurement task and send the positioning information back to the ground receiving station.

[0027] The floating body 2 is fixedly connected above the control cabin 3. The main function of the floating body 2 is to adjust the overall attitude of the deep - sea pore water circulation collection device in water and provide the buoyancy required for the control cabin 3 to float. Preferably, the floating body 2 is made of glass microsphere material and coated with a polyurea coating. Glass microspheres are emerging buoyancy materials, which have the characteristics of high - pressure resistance, light weight, corrosion resistance, and easy machining.

[0028] The control cabin 3 is fixedly connected above the release module 4. The control cabin 3 is the control core of the entire deep - sea pore water circulation collection device. It is internally equipped with a control circuit, and its main function is to complete the control of system timing, pore water circulation collection, parameter measurement, etc. The GNSS module 1, the release module 4, the temperature sensor 6, and the pore water circulation collection cabin 7 are respectively electrically connected to the control circuit.

[0029] The release module 4 is connected above the support column 5. The main function of the release module 4 is to separate the control cabin 3 from the support column 5. Preferably, the release module 4 realizes the release by means of electrochemical corrosion. The basic principle is to use the natural salinity environment in seawater as the electrolyte, apply the electrolysis reaction principle in electrochemistry, and the control circuit turns on the analog switch to apply a potential difference to the electrolytic wire immersed in water and the cathode, so as to fuse the electrolytic wire of the locking device at the anode and complete the release action. The signal connection lines between the control cabin 3 and the temperature sensor 6 and the pore water circulation collection cabin 7 are pulled off under the strong buoyancy of the floating body 2, so that the control cabin 3 is completely separated from the components below it; or the circuits of the temperature sensor 6 and the pore water circulation collection cabin 7 and the control circuit can also be set to transmit signals wirelessly inside the deep - sea pore water circulation collection device. In this way, when the release module 4 releases the floating body 2 and the control cabin 3, the control cabin 3 can also be completely separated from the components below it.

[0030] The temperature sensor 6 is fixed on the side of the support column 5. The main function of the temperature sensor 6 is to measure temperature and store it self - contained. The temperature measurement is realized by using a thermistor element.

[0031] The pore water circulation collection cabin 7 is fixedly connected below the support column 5, and the pointed head is fixedly connected below the pore water circulation collection cabin 7. The pore water circulation collection cabin 7 mainly completes the multiple - cycle collection and detection of sediment pore water and is the core module of the entire device.

[0032] In a preferred embodiment of the present invention, as Figure 2As shown in the figure, a water sampler 701, a water collection tank 706, a water pump 702, a first solenoid valve 703, a second solenoid valve 704, and a filter 705 are arranged inside the pore water circulation collection tank 7. The filter 705 is fixed on the side of the pore water circulation collection tank 7 and is communicated with the outside of the pore water circulation collection tank 7. The first solenoid valve 703 is connected to the filter 705, and the water sampler 701 is connected to the first solenoid valve 703. A multi-parameter sensor is arranged inside the water sampler 701 for measuring the ion content in the pore water. The multi-parameter sensor is a highly integrated technical device that can simultaneously measure multiple parameters related to the marine environment, including but not limited to temperature, salinity, dissolved oxygen, flow velocity and direction, turbidity, pH value, nutrient concentration, wave characteristics, and marine acoustic characteristics, etc. In addition to measuring the Cl— and SO42— ion content in the pore water, it can also measure more parameters for other research. The input end of the water pump 702 is connected to the water sampler 701, the output end of the water pump 702 is connected to the second solenoid valve 704, and the second solenoid valve 704 is connected to the water collection tank 706. The above connections all refer to connections through pipelines, so that the pore water can flow between the water sampler 701, the water collection tank 706, the water pump 702, the first solenoid valve 703, the second solenoid valve 704, and the filter 705. The water pump 702, the first solenoid valve 703, the second solenoid valve 704, and the multi-parameter sensor are all electrically connected to the control circuit. In the pore water circulation collection tank 7 with this structure, after the water sampler 701 collects and detects the pore water, the pore water is discharged into the water collection tank 706 through the water pump 702 and the second solenoid valve 704. Therefore, the number of times the water sampler 701 circulates and collects is restricted by the volume of the water collection tank 706.

[0033] In another preferred embodiment of the present invention, as Figure 3As shown in the figure, a water sampler 701, a water pump 702, a first solenoid valve 703, a second solenoid valve 704, and a filter 705 are arranged inside the pore water circulation collection chamber 7. The filter 705 is fixed to the side of the pore water circulation collection chamber 7 and is communicated with the outside of the pore water circulation collection chamber 7. The first solenoid valve 703 is connected to the filter 705, and the water sampler 701 is connected to the first solenoid valve 703. A multi-parameter sensor is arranged inside the water sampler 701 and is used to measure the ion content in the pore water. The multi-parameter sensor is a highly integrated technical device that can simultaneously measure multiple parameters related to the marine environment, including but not limited to temperature, salinity, dissolved oxygen, flow velocity and direction, turbidity, pH value, nutrient concentration, wave characteristics, and marine acoustic characteristics, etc. In addition to measuring the Cl— and SO42— ion content in the pore water, it can also measure more parameters for other research. The input end of the water pump 702 is connected to the water sampler 701, and the output end of the water pump 702 is connected to the second solenoid valve 704. The above connections all refer to connections through pipelines, so that the pore water can flow between the water sampler 701, the water pump 702, the first solenoid valve 703, the second solenoid valve 704, and the filter 705. The second solenoid valve 704 is fixed to the top side of the pore water circulation collection chamber 7 and is communicated with the outside of the pore water circulation collection chamber 7. The water pump 702, the first solenoid valve 703, the second solenoid valve 704, and the multi-parameter sensor are all electrically connected to the control circuit. In the pore water circulation collection chamber 7 with this structure, after the water sampler 701 collects and detects the pore water, the pore water is discharged outside the pore water circulation collection chamber 7 through the water pump 702 and the second solenoid valve 704. However, there is a huge pressure in the seabed environment outside the pore water circulation collection chamber 7. To discharge the pore water in the water sampler 701, a relatively large internal pressure is required to achieve this. Therefore, the water pump 702 here must be a high-pressure pump to smoothly discharge the pore water. The advantage of this structure is also obvious, that is, it will not be restricted by the limited wastewater discharge space, and more cyclic collection and detection times can be achieved.

[0034] Among them, the water sampler 701 collects pore water under different working water depths. Due to the huge pressure difference between the inside and outside of the water sampler 701, to achieve the smooth collection of pore water, it is necessary to completely separate mud and water and ensure that sediment does not enter the water sampler 701. Otherwise, the valve will be damaged, and even the water sampler 701 equipment will be damaged. Therefore, the selection and setting of the filter 705 are very crucial. Preferably, the filter 705 of the present invention can be set to 4 layers. The filter element at the water inlet of the water sampler 701 uses a stainless steel fiber sintered felt as the support layer, and its surface is covered with two layers of microporous filter membranes (pore diameter 0.22 microns), and the outermost layer is a stainless steel screen protection layer. The support layer fiber sintered felt is sintered in a sintering furnace from 316L stainless steel fibers under high temperature and vacuum protection. After sintering, the sintered felt has high strength, stable structure, good corrosion resistance, a three-dimensional network porous structure, high porosity, large surface area, tiny pores, and uniform distribution, and is an ideal pore water filtering material for adjusting pressure difference and controlling flow rate.

[0035] The first solenoid valve 703 can be selected as a normally closed solenoid valve, with a maximum working pressure of 15 MPa and an opening voltage of 12 - 24 VDC. During sampling, the pore water flows through the filter 705 and enters the first solenoid valve 703 through the channel. The electromagnet will open the valve under the opening voltage. At this time, the pore water can enter the water storage chamber of the water sampler 701 from the first solenoid valve 703. When the water sampling reaches the predetermined working time, the water sampler 701 is already filled with pore water, the electromagnet is powered off, and the first solenoid valve 703 automatically closes to complete the collection of pore water and wait for detection. After the multi-parameter sensor completes the detection, the second solenoid valve 704 is opened according to the time program, and the water pump 702 is used to drain the water (into the water collection tank 706 or outside the pore water circulation collection tank 7), and the second solenoid valve 704 is closed to wait for the next sampling cycle.

[0036] In a preferred embodiment of the present invention, as Figure 4 shown, the control circuit includes a CPU (Central Processing Unit) 301, an external memory 302, a clock chip 303, and a power module 304. The power module 304 is used to supply power to the control circuit, and the CPU 301 is electrically connected to the external memory 302 and the clock chip 303 respectively.

[0037] Specifically, the CPU 301 is electrically connected to the GNSS module 1, the temperature sensor 6, the water pump 702, the first solenoid valve 703, the second solenoid valve 704, and the multi-parameter sensor through the RS-232 interface, is electrically connected to the release module 4 through the I / O interface, is electrically connected to the clock chip 303 through the I2C interface, and is electrically connected to the external memory 302 through the SPI interface.

[0038] In addition to the above designs, based on the posture of the deep-sea porous water circulation collection device in the water and its penetration characteristics, its overall design should also consider: (1) The shell of the device reduces the area of ​​the frontal surface, and the frontal surface adopts a chamfer design to remove burrs, reduce water resistance and jitter; (2) The shell surface of the device adopts a polished design to reduce viscous water resistance; (3) The control cabin 3 and the buoyancy module can be equipped with tail fins, which are evenly and symmetrically distributed on the outer wall as auxiliary mechanisms for stabilizing the posture.

[0039] The embodiment of the present invention also provides a deep-sea pore water circulation collection method, using the aforementioned deep-sea pore water circulation collection device provided with a water collection chamber 706, such as Figure 5 As shown, including: S1, evacuate the water sampler 701, the water collection chamber 706, and the water delivery pump 702.

[0040] Before launching the deep-sea pore water circulation collection device, the water sampler 701 and the circulation system are first evacuated to prevent the internal air pressure from hindering the entry of pore water.

[0041] S2, set parameters for the control circuit.

[0042] The deep-sea pore water circulation collection device is used for in-situ collection and circulation procedures. The deployment, recovery and opening / closing of the water sampler 701 for water collection and circulation are fully automatically monitored through an underwater computer. The system is started at a scheduled time.

[0043] S3, the deep-sea pore water circulation collection device is placed into the sea through the winch cable connection on the ship, and the deep-sea pore water circulation collection device penetrates into the seabed sediments by its own weight.

[0044] When deployed, the device is hoisted into the sea through the winch cable connection on the ship, and a special releaser is used to disconnect the system from the cable, so that the device sinks to the seabed. The maximum working water depth of the device is 1000m. The device is designed to be streamlined and penetrates into the seabed sediment by its own weight, with a penetration depth of not less than 2 meters.

[0045] S4, the deep-sea pore water circulation collection device is started according to the scheduled sequence.

[0046] S5, the control circuit controls the first solenoid valve 703 to open, and utilizes the hydrostatic pressure difference between the inside and outside of the water sampler 701 to allow the sediment pore water to pass through the filter 705 and enter the water sampler 701.

[0047] Collecting sediment pore water: Using the strong hydrostatic pressure difference inside and outside the water sampler 701, the sediment pore water passes through the filter 705 and enters the sampler, completing the efficient collection of pore water, and the collected water volume is not less than 100ml.

[0048] S6, the control circuit controls the first solenoid valve 703 to lock, and uses a multi-parameter sensor to measure parameters.

[0049] S7, the control circuit controls the second solenoid valve 704 to open, and the control circuit controls the water pump 702 to discharge the pore water in the water sampler 701 into the water collection tank 706.

[0050] S8, standby and wait for the next cycle of collection and detection. The actions of S5 to S7 are performed for each cycle of collection and detection.

[0051] S9, after all the detection tasks are completed, the control cabin 3 is released according to the predetermined time sequence. The control cabin 3 floats to the water surface driven by the floating body 2, is positioned by the GNSS module 1, and waits to be recovered.

[0052] Another embodiment of the present invention also provides a deep-sea pore water circulation collection method, which uses the aforementioned deep-sea pore water circulation collection device without a water collection tank and with the water pump 702 being a high-pressure pump, as Figure 6 shown, including: S1, evacuate the water sampler 701 and the water pump 702.

[0053] Before the deep-sea pore water circulation collection device is put into the water, first evacuate the water sampler 701 and the circulation system to prevent the internal air pressure from hindering the entry of pore water.

[0054] S2, set parameters for the control circuit.

[0055] Adopt the in-situ collection and circulation program of the deep-sea pore water circulation collection device, and realize the full-automatic monitoring of the deployment, recovery of the device, the opening / closing of the water sampler 701 for water collection, and the circulation process through an underwater computer. The system starts regularly.

[0056] S3, deploy the deep-sea pore water circulation collection device into the sea through the connection of the steel cable of the ship's winch. The deep-sea pore water circulation collection device penetrates into the seabed sediment by its own weight.

[0057] During deployment, the device is lifted into the sea through the connection of the steel cable of the ship's winch, and a special release is used to disconnect the system from the steel cable, so that the device sinks to the seabed. The maximum working depth of the device is 1000m. The device is designed with a streamlined shape and penetrates into the seabed sediment by its own weight, and the penetration depth is not less than 2 meters.

[0058] S4, the deep-sea pore water circulation collection device starts according to the predetermined time sequence.

[0059] S5, the control circuit controls the first solenoid valve 703 to open, and uses the hydrostatic pressure difference inside and outside the water sampler 701 to make the pore water in the sediment enter the water sampler 701 through the filter 705.

[0060] Collecting sediment pore water: By utilizing the strong hydrostatic pressure difference between the inside and outside of the water sampler 701, the sediment pore water is made to enter the sampler through the filter 705, completing the efficient collection of the pore water, and the collected water volume is not less than 100 ml.

[0061] S6, the control circuit controls the first solenoid valve 703 to lock, and uses the multi-parameter sensor to measure parameters.

[0062] S7, the control circuit controls the second solenoid valve 704 to open, and the control circuit controls the water pump 702 (high-pressure pump) to discharge the pore water in the water sampler 701 outside the deep-sea pore water circulation collection device.

[0063] S8, standby and wait for the next cycle of collection and detection, and the actions of S5 to S7 are performed for each cycle of collection and detection.

[0064] S9, after all the detection tasks are completed, the control cabin 3 is released according to the predetermined sequence. The control cabin 3 floats to the water surface driven by the floating body 2, and is positioned through the GNSS module 1 and waits to be recovered.

[0065] The above description is a detailed description of the preferred and feasible embodiments of the present invention, but the embodiments are not intended to limit the patent application scope of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the patent scope covered by the present invention.

Claims

1. A deep - sea pore water circulation collection device, characterized in that, Including: A GNSS module, a floating body, a control cabin, a release module, a support column, a temperature sensor, a pore water circulation collection cabin, and a pointed tip. The GNSS module is fixedly connected above the floating body. The floating body is fixedly connected above the control cabin. The control cabin is fixedly connected above the release module. The release module is connected above the support column. The temperature sensor is fixed on the side of the support column. The pore water circulation collection cabin is fixedly connected below the support column. The pointed tip is fixedly connected below the pore water circulation collection cabin. A control circuit is arranged inside the control cabin. The GNSS module, the release module, the temperature sensor, and the pore water circulation collection cabin are respectively electrically connected to the control circuit. The GNSS module is used to send positioning information back to the ground receiving station. The floating body is used to provide the buoyancy required for the control cabin to float. The control cabin is used to complete the control of the system timing, pore water circulation collection, and parameter measurement of the deep-sea pore water circulation collection device. The release module is used to separate the control cabin from the support column. The temperature sensor is used for temperature measurement. The pore water circulation collection cabin is used to complete the cyclic collection of sediment pore water.

2. The deep-sea pore water circulation collection device according to claim 1, wherein, Inside the pore water circulation collection cabin, there are a water sampler, a water collection tank, a water pump, a first solenoid valve, a second solenoid valve, and a filter. The filter is fixed on the side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin. The first solenoid valve is connected to the filter. The water sampler is connected to the first solenoid valve. Inside the water sampler, there are multi-parameter sensors for measuring the ion content in the pore water. The input end of the water pump is connected to the water sampler. The output end of the water pump is connected to the second solenoid valve. The second solenoid valve is connected to the water collection tank. The water pump, the first solenoid valve, the second solenoid valve, and the multi-parameter sensors are all electrically connected to the control circuit.

3. The deep-sea pore water circulation collection device according to claim 1, characterized in that Inside the pore water circulation collection cabin, there are a water sampler, a water pump, a first solenoid valve, a second solenoid valve, and a filter. The filter is fixed on the side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin. The first solenoid valve is connected to the filter. The water sampler is connected to the first solenoid valve. Inside the water sampler, there are multi-parameter sensors for measuring the ion content in the pore water. The input end of the water pump is connected to the water sampler. The output end of the water pump is connected to the second solenoid valve. The water pump uses a high-pressure pump. The second solenoid valve is fixed on the top side of the pore water circulation collection cabin and is communicated with the outside of the pore water circulation collection cabin. The water pump, the first solenoid valve, the second solenoid valve, and the multi-parameter sensors are all electrically connected to the control circuit.

4. The deep-sea pore water circulation collection device according to claim 2 or 3, characterized in that, The filter element of the filter uses a stainless steel fiber sintered felt as the support layer. The surface of the support layer is covered with two layers of microporous filter membranes. The surface layer of the filter is a stainless steel screen protection layer.

5. The deep-sea pore water circulation collection device according to claim 2 or 3, characterized in that, The control circuit includes a CPU, an external memory, a clock chip, and a power module. The power module is used to supply power to the control circuit. The CPU is electrically connected to the external memory and the clock chip respectively.

6. The deep-sea pore water circulation collection device according to claim 5, wherein, The CPU is electrically connected to the GNSS module, the temperature sensor, the water pump, the first solenoid valve, the second solenoid valve and the multi-parameter sensor through the RS-232 interface, is electrically connected to the release module through the I / O interface, is electrically connected to the clock chip through the I2C interface, and is electrically connected to the external memory through the SPI interface.

7. The deep-sea pore water circulation collection device according to claim 1, characterized in that, The release module realizes release by electrochemical corrosion.

8. The deep-sea pore water circulation collection device according to claim 1, characterized in that The float is made of glass microbead material and is covered with a polyurea coating.

9. A deep - sea pore water circulation collection method, characterized in that, The deep sea pore water circulation collection device as claimed in claim 2 comprises: S1, vacuum the water sampler, water collection tank and water delivery pump; S2, setting parameters of the control circuit; S3, the deep-sea pore water circulation collection device is placed in the sea through the winch steel cable connection on the ship, and the deep-sea pore water circulation collection device penetrates into the seabed sediment by its own weight; S4, the deep-sea pore water circulation collection device is started according to the scheduled sequence; S5, the control circuit controls the first solenoid valve to open, and utilizes the hydrostatic pressure difference between the inside and outside of the water sampler to allow the sediment pore water to pass through the filter and enter the water sampler; S6, the control circuit controls the first solenoid valve to lock, and uses the multi-parameter sensor to measure parameters; S7, the control circuit controls the second solenoid valve to open, and the control circuit controls the water delivery pump to discharge the pore water in the water sampler into the water collection tank; S8, waiting for the next cycle of collection and detection, each cycle of collection and detection performs the actions of S5 to S7; S9, after all detection tasks are completed, the control cabin is released according to the predetermined sequence. The control cabin floats to the surface driven by the float, is positioned by the GNSS module, and waits for recovery.

10. A deep-sea pore water circulation collection method, characterized in that The deep sea pore water circulation collection device as claimed in claim 3 comprises: S1, evacuate the water sampler and water delivery pump; S2, setting parameters of the control circuit; S3, the deep-sea pore water circulation collection device is placed in the sea through the winch steel cable connection on the ship, and the deep-sea pore water circulation collection device penetrates into the seabed sediment by its own weight; S4, the deep-sea pore water circulation collection device is started according to the scheduled sequence; S5, the control circuit controls the first solenoid valve to open, and utilizes the hydrostatic pressure difference between the inside and outside of the water sampler to allow the sediment pore water to pass through the filter and enter the water sampler; S6, the control circuit controls the first solenoid valve to lock, and uses the multi-parameter sensor to measure parameters; S7, the control circuit controls the second solenoid valve to open, and the control circuit controls the water delivery pump to discharge the pore water in the water sampler to outside the deep-sea pore water circulation collection device; S8, waiting for the next cycle of collection and detection, each cycle of collection and detection performs the actions of S5 to S7; S9, after all detection tasks are completed, the control cabin is released according to the predetermined sequence. The control cabin floats to the surface driven by the float, is positioned by the GNSS module, and waits for recovery.

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