A multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage device based on a manned submersible

Abstract

The present application discloses a multi-chamber deep-sea hydrothermal fluid heat preservation and pressure-maintaining sampling and storage device based on a manned submersible, belonging to the field of deep-sea sampling. The device comprises a sequential sampling valve, the bottom of which is connected to an in-situ liquid storage mechanism, the bottom of which is connected to an energy storage mechanism, the energy storage mechanism being connected to a sample fidelity storage mechanism via a third pipeline. The sequential sampling valve is internally provided with a cavity, the cavity being provided with a valve core component, the in-situ liquid storage mechanism is internally provided with an in-situ liquid heat preservation and pressure-maintaining storage cavity, the sample fidelity storage mechanism being connected to the in-situ liquid heat preservation and pressure-maintaining storage cavity via a first pipeline and a second pipeline, respectively. A driving member within the sequential sampling valve drives the valve core component to move up and down within the cavity to connect the sampling tube connection port on the sequential sampling valve and the second pipeline. Therefore, the present application adopts the above-mentioned multi-chamber deep-sea hydrothermal fluid sampling and storage device based on a manned submersible to solve the technical problems of existing deep-sea hydrothermal fluid sampling and storage devices in achieving multi-point heat preservation, pressure maintenance, and high-purity sampling.

Description

Technical Field

[0001] The present application belongs to the field of deep-sea sampling technology, and specifically relates to a multi-chamber deep-sea hydrothermal heat preservation and pressure maintaining sampling storage device based on a manned submersible. Background Art

[0002] Deep-sea hydrothermal vents are rich in marine biological and mineral resources, especially high-temperature microorganisms in extreme environments. With their unique biodiversity and extremely high survival density, they will become valuable biological genes and medical resources in the future, with inestimable biochemical and medical value. However, the extreme high temperature and high pressure environment of deep-sea hydrothermal vents makes sampling extremely difficult. Existing sampling storage devices have certain shortcomings in achieving multi-point heat preservation, pressure maintenance, and high-purity sampling. This is mainly due to the inability of existing sampling storage devices to maintain the in-situ temperature and pressure of the hydrothermal vents during the sampling process, and it is difficult to avoid sample contamination. As a result, a large number of microorganisms in the obtained hydrothermal samples die due to the in-situ temperature and pressure environment after sampling, which limits human research on in-situ microorganisms in deep-sea hydrothermal environments. To overcome these difficulties, it is necessary to provide a multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage device based on a manned submersible to obtain deep-sea hydrothermal samples maintained in situ for scientific research. Summary of the Invention

[0003] The purpose of this application is to prepare a multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage device based on a manned submersible, so as to solve the shortcomings of existing sampling storage devices in achieving in-situ heat preservation, pressure maintenance and multi-point high-purity sampling of deep-sea hydrothermal fluids.

[0004] In order to achieve the above-mentioned objectives, the present invention provides a multi-chamber deep-sea hydrothermal heat preservation and pressure maintaining sampling storage device based on a manned submersible, including a sequential sampling valve, the bottom of the sequential sampling valve is connected to an in-situ liquid storage mechanism, the bottom of the in-situ liquid storage mechanism is connected to an energy storage mechanism, the energy storage mechanism is connected to a sample fidelity storage mechanism through a third pipeline, a cavity is provided inside the sequential sampling valve, a valve core part is provided in the cavity, an in-situ liquid heat preservation and pressure maintaining storage cavity is provided inside the in-situ liquid storage mechanism, the sample fidelity storage mechanism is connected to the in-situ liquid heat preservation and pressure maintaining storage cavity and the cavity through a first pipeline and a second pipeline respectively, a sampling tube connecting port is provided on the sequential sampling valve, the sampling tube is connected to the cavity through the sampling tube connecting port, and a driving member inside the sequential sampling valve drives the valve core part to move up and down in the cavity to connect the sampling tube and the second pipeline on the sequential sampling valve.

[0005] Preferably, the sequential sampling valve includes a sampling outer shell, a sampling inner shell is provided inside the sampling outer shell, a pressure balancing head is provided on the inner top of the sampling inner shell, the interior of the pressure balancing head is connected to a sliding head through a sealing ring, the bottom of the pressure balancing head is connected to a first valve core part, a liquid flow hole is provided on the first valve core part, and annular grooves are provided at positions corresponding to both ends of the first valve core part and the liquid flow hole, the annular grooves include a lower annular groove and an upper annular groove, and an in-situ liquid thermal insulation and pressure storage chamber connection port and a second pipeline connection port are also provided on the sampling outer shell. When the first valve core part connects the sampling tube connection port with the second pipeline, the in-situ liquid enters the lower annular groove from the sampling tube connection port, flows through the liquid flow hole, and enters the sample fidelity storage mechanism from the upper annular groove through the second pipeline.

[0006] Preferably, a second valve core part is provided at the bottom of the first valve core part, a limiting part is provided on the sampling inner shell body, a hollow servo motor is built into the bottom of the limiting part, a circumferential positioning part is provided at the bottom of the hollow servo motor, the inner diameter of the limiting part corresponds to the outer diameter of the second valve core part, the hollow servo motor, the second valve core part, the limiting part and the circumferential positioning part form a screw mechanism, the hollow servo motor drives the second valve core part and the first valve core part to move up and down, a valve core placement cavity is provided at the top of the in-situ liquid storage mechanism, and the bottom of the second valve core part is provided in the valve core placement cavity.

[0007] Preferably, the sample fidelity storage mechanism includes a sample fidelity outer shell, a sample fidelity inner shell is arranged inside the sample fidelity outer shell, a heat-insulating heating wire is arranged on the outside of the sample fidelity inner shell, the heat-insulating heating wire is electrically connected to the controller arranged on the sampling storage device, a sample fidelity storage cavity is opened inside the sample fidelity inner shell, the bottom of the sample fidelity storage cavity is sealedly connected to the accumulator inside the energy storage mechanism through a threaded head and a third pipeline, a sealed fidelity piston is arranged on the upper part of the sample fidelity storage cavity, one end of the fidelity piston is fixedly connected to the second pipeline, and the other end of the fidelity piston is connected to the first pipeline through a one-way valve.

[0008] Preferably, the in-situ liquid storage mechanism is fixedly connected to the sequential sampling valve and the energy storage mechanism respectively, and the three are fixedly connected to the sample fidelity storage mechanism via a fixed bracket and an outer frame.

[0009] Preferably, a first sealing ring and a lower sealing ring are provided on the sampling inner shell body, a valve core sealing ring is provided at the lower end of the second valve core part, one side of the first pipeline is sealedly connected to the in-situ liquid insulation and pressure storage chamber through a piston, the middle part of the first pipeline is arranged on the in-situ liquid insulation and pressure storage chamber connection port through a threaded head, the other side of the first pipeline is sealedly connected to the sample fidelity inner shell through a threaded head, the second pipeline is sealedly arranged on the second pipeline connection port through a threaded head, one side of the second pipeline is fixedly connected to the cavity, the other side of the second pipeline is sealedly connected to the sample fidelity inner shell through a threaded head, and the sampling tube is sealedly connected to the sampling tube connection port through a threaded head.

[0010] Preferably, the controller is electrically connected to the energy storage mechanism, the hollow servo motor and the heat-insulating heating wire.

[0011] Preferably, the sampling tube connection port is provided on the sampling outer shell, the sampling tube connection port is communicated with the cavity, and the sampling tube connection port is connected to the sampling tube connection port.

[0012] Preferably, when the multi-chamber deep-sea hydrothermal insulation and pressure maintaining sampling storage device is working, a pressure of 3-5MPa is first pre-charged through the accumulator, and the piston in the sample fidelity storage chamber is pushed to the side away from the accumulator. Then the sampling tube is aligned with the in-situ liquid, and the rotation angle of the hollow servo motor is controlled by the controller. Then, the sampling tube and the second pipeline are connected, so that the in-situ liquid enters the lower annular groove from the sampling port, flows through the liquid flow hole, and enters the sample fidelity storage chamber from the upper annular groove through the second pipeline. Then, the one-way valve is opened to allow the in-situ liquid to enter the in-situ liquid insulation and pressure maintaining storage chamber from the sample fidelity storage chamber. When the in-situ liquid insulation and pressure maintaining storage chamber is filled, the in-situ liquid continues to press the piston down to enter the sample fidelity storage chamber.

[0013] Therefore, the present application adopts the above-mentioned multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage device based on a manned submersible, which solves the technical problems of the existing sampling storage device in achieving multi-point heat preservation, pressure maintenance and high-purity sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0015] Figure 1 This is the overall structural diagram of the sampling memory of this application;

[0016] Figure 2 This is a diagram of the internal structure of the sampling memory of this application;

[0017] Figure 3 A cross-sectional view of the internal structure of the sampling memory of the present application;

[0018] Figure 4This is a diagram of the sample fidelity storage mechanism for this application;

[0019] Figure 5 This is a diagram of the internal structure of the sample fidelity storage chamber of this application;

[0020] Figure 6 This is a structural diagram of the heat preservation heating wire of this application;

[0021] Figure 7 This is a diagram of the internal structure of the in-situ liquid storage mechanism and energy storage mechanism of the present application;

[0022] Figure 8 This is the overall structural diagram of the sequential sampling valve of this application;

[0023] Figure 9 This is an overall structural diagram of the sequential sampling valve of the present application from another angle;

[0024] Figure 10 A cross-sectional view of a sequential sampling valve according to the present application;

[0025] Figure 11 A bottom view of the sequential sampling valve of the present application;

[0026] Figure 12 This is a structural diagram of the sampling inner shell of this application;

[0027] Figure 13 This is a diagram of the internal structure of the pressure balancing head of this application;

[0028] Figure 14 This is a diagram showing the internal structure of the first valve core component of the present application;

[0029] Figure 15 This is an assembly cross-sectional view of the valve core parts of this application;

[0030] Figure 16 This is the circuit diagram of this application.

[0031] Reference numerals

[0032] 1. Sequential sampling valve; 11. Sampling outer shell; 12. Sampling inner shell; 120. Stopper; 121. First sealing ring; 122. Lower sealing ring; 123. Pressure balancing head; 1231. Sliding head; 1232. Pressure chamber; 124. Hollow servo motor; 125. Sealing ring; 126. First valve core component; 1261. Upper annular groove; 1262. Lower annular groove; 1263. Liquid flow hole; 1264. Connecting hole; 127. Second valve core component; 128. Circumferential positioning member; 129. Valve core sealing ring; 13. In-situ liquid heat and pressure storage chamber Connecting port; 14, second pipeline connecting port; 15, sampling tube connecting port; 16, cavity; 2, in-situ liquid storage mechanism; 21, in-situ liquid heat preservation and pressure maintaining storage chamber; 22, valve core placement chamber; 3, energy storage mechanism; 31, accumulator piston head; 4, third pipeline; 5, first pipeline; 6, second pipeline; 7, fixed bracket; 8, outer frame; 9, sample fidelity storage mechanism; 91, sample fidelity inner shell; 92, heat preservation heating wire; 93, one-way valve; 94, sample fidelity outer shell; 10, sampling tube; 101, sampling head; 102, fidelity piston; 103, fidelity sealing ring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0034] As attached Figure 1-16 As shown, the present application provides a multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage based on a manned submersible, including a sequential sampling valve 1, the bottom of the sequential sampling valve 1 is connected to an in-situ liquid storage mechanism 2, the bottom of the in-situ liquid storage mechanism 2 is connected to an energy storage mechanism 3, the energy storage mechanism 3 is connected to a sample fidelity storage mechanism 9 through a third pipeline 4, the interior of the sequential sampling valve 1 is provided with a cavity 16, the cavity 16 is provided with a valve core part, the interior of the in-situ liquid storage mechanism 2 is provided with an in-situ liquid heat preservation and pressure maintenance storage chamber 21. The sample fidelity storage mechanism 9 is connected to the in-situ liquid heat preservation and pressure maintaining storage chamber 21 and the cavity 16 through the first pipeline 5 and the second pipeline 6 respectively. The sequential sampling valve 1 is provided with a sampling tube connection port 15. The sampling tube 10 is connected to the cavity 16 through the sampling tube connection port 15. The driving member inside the sequential sampling valve 1 drives the valve core part to move up and down in the cavity 16 to connect the sampling tube 10 and the second pipeline 6 on the sequential sampling valve 1. The valve core part includes a first valve core part 126 and a second valve core part 127.

[0035] The sequential sampling valve 1 includes a sampling outer shell 11, the inner sealing of the sampling outer shell 11 is provided with a sampling inner shell 12, the sampling inner shell 12 is provided with a first sealing ring 121 and a lower end sealing ring 122, and the sampling outer shell 11 is also provided with four in-situ liquid heat preservation and pressure storage chamber connection ports 13 and four second pipeline connection ports 14, the four in-situ liquid heat preservation and pressure storage chamber connection ports 13 and the four second pipeline connection ports 14 are not arranged at the same horizontal plane, the sampling tube connection port 15 is located below the second pipeline connection port 14, and the sampling tube 10 and the sampling tube connection port 15 are connected by a threaded head. Sealed connection, the in-situ liquid thermal insulation and pressure maintenance storage chamber connection port 13 is connected to the first pipeline 5 through a threaded head, one side of the first pipeline 5 is sealed and connected to the in-situ liquid thermal insulation and pressure maintenance storage chamber 21 through a piston, the other side of the first pipeline 5 is sealed and connected to the sample fidelity housing 94 through a threaded head, the second pipeline connection port 14 is connected to the second pipeline 6 through a threaded head, one side of the second pipeline 6 is connected to the cavity 16, the other side of the second pipeline 6 is sealed and connected to the sample fidelity housing 94 through a threaded head, the first pipeline 5 is connected to the fidelity piston 102 through a one-way valve 93, and the second pipeline 6 is fixedly connected to the fidelity piston 102.

[0036] The interior of the sampling inner housing 12 is provided with a cavity 16, and the inner top of the cavity 16 is provided with a pressure balancing head 123 connected to the ambient pressure. The pressure balancing head 123 is provided with an internal cavity, and the internal pressure cavity 1232 of the pressure balancing head 123 is connected to the sliding head 1231 through a sealing ring 125. The sampling inner housing 12 is provided with a cavity 16 connected to the internal cavity, and the valve core parts are provided in the cavity 16. The valve core parts include a first valve core part 126 and a second valve core part 127. The bottom of the pressure balancing head 123 is connected to the first valve core part 126, and the bottom of the first valve core part 126 is fixedly provided with the second valve core part 127. The sampling inner housing 1 2 is provided with a limit member 120, and a hollow servo motor 124 is built into the bottom of the limit member 120. A circumferential positioning member 128 is provided at the bottom of the hollow servo motor 124. The inner diameter of the limit member 120 corresponds to the outer diameter of the second valve core part 127, so that the hollow servo motor 124, the second valve core part 127, the limit member 120 and the circumferential positioning member 128 form a screw mechanism. The first valve core part 126 and the second valve core part 127 can only move up and down in the cavity 16. A valve core placement cavity 22 is provided at the top of the in-situ liquid storage mechanism 2, and the bottom of the second valve core part 127 is arranged in the valve core placement cavity 22 through a valve core sealing ring 129.

[0037] The first valve core part 126 is provided with a liquid flow hole 1263, and connecting holes 1264 are respectively provided at both ends of the liquid flow hole 1263. The first valve core part 126 and the corresponding positions of the two ends of the liquid flow hole 1263 are respectively provided with a lower annular groove 1262 and an upper annular groove 1261. The connecting holes 1264 are respectively connected to the upper annular groove 1261 and the lower annular groove 1262. The sampling tube connection port 15 is provided on the sampling outer shell 11. When the first valve core part 126 connects the sampling tube connection port 15 with the second pipeline 6, the in-situ liquid enters the lower annular groove 1262 from the sampling tube connection port 15, flows through the liquid flow hole 1263, and enters the sample fidelity storage mechanism 9 from the upper annular groove 1261 through the second pipeline 6. Figure 10 As shown in the figure, the sliding head 1231 and the second valve core part 127 withstand external pressure by contacting the in-situ high-pressure environment, and can both move up and down, and achieve sealing by contact with the first sealing ring 121 and the lower end sealing ring 122. Since the two parts have the same cross-sectional area exposed to the outside, the environmental pressures on both sides of the valve core offset each other, so that when the servo motor drives the valve core to move, it is only subject to the friction resistance of the mechanism movement, and the servo motor drive resistance is reduced by balancing the pressure on both sides.

[0038] The sample fidelity storage mechanism 9 includes a sample fidelity outer shell 94, a sample fidelity inner shell 91 is provided inside the sample fidelity outer shell 94, a heat-insulating heating wire 92 is provided on the outside of the sample fidelity inner shell 91, and a fidelity sealing ring 103 is also provided between the sample fidelity outer shell 94 and the sample fidelity inner shell 91. The heat-insulating heating wire 92 is electrically connected to the controller. A sample fidelity storage chamber is provided inside the sample fidelity inner shell 91. The bottom of the sample fidelity storage chamber is sealedly connected to the accumulator inside the energy storage mechanism 3 through a threaded head and a third pipeline 4. The accumulator is sealedly connected to the energy storage mechanism 3 through an accumulator piston head 31. A sealed fidelity piston 102 is provided on the upper part of the sample fidelity storage chamber. One end of the fidelity piston 102 is fixedly connected to the second pipeline 6, and the other end of the fidelity piston 102 is connected to the first pipeline 5 through a one-way valve 93.

[0039] The in-situ liquid storage mechanism 2 is fixedly connected to the sequential sampling valve 1 and the energy storage mechanism 3 , respectively. The three are fixedly connected to the sample fidelity storage mechanism 9 via a fixed bracket 7 and an outer frame 8 .

[0040] The controller provided on the sampling storage device is electrically connected to the accumulator in the energy storage mechanism 3, the hollow servo motor 124, and the heat-insulating heating wire 92. The accumulator in this application is a common piston-type pre-charged pressure accumulator. Before sampling, each accumulator compartment inside the housing of the energy storage mechanism 3 needs to be pre-charged with air at a certain pressure through the upper pressure injection port.

[0041] When the multi-chamber deep-sea hydrothermal sampling storage device is working, the sliding head 1231 of the pressure balancing head 123 and the second valve core part 127 are connected to the external environment, and the second valve core part 127 is placed in the valve core placement chamber 22. A small hole is opened in the valve core placement chamber 22 to connect to the external high-pressure environment. The ROV or manned submersible is carried to the sampling position, and the sample fidelity storage chamber is pre-charged with 3-5MPa pressure through the accumulator. The piston in the sample fidelity storage chamber is pushed to the side away from the accumulator, and then the sampling head 101 of the sampling tube 10 is aligned with the in-situ liquid. The air is controlled by the controller. The central servo motor 124 rotates an angle, connecting the sampling tube 10 and the second pipeline 6. Due to the pressure differential, the in-situ liquid enters the lower annular groove 1262 from the sampling port, flows through the liquid flow hole 1263, and then flows from the upper annular groove 1261 through the second pipeline 6 into the sample fidelity storage chamber. The one-way valve 93 then opens. Due to the pressure differential, the in-situ liquid enters the in-situ liquid heat preservation and pressure maintenance storage chamber 21. When the in-situ liquid heat preservation and pressure maintenance storage chamber 21 is full, the pressure differential causes the in-situ liquid to continue to push down the piston and enter the sample fidelity storage chamber. Because impurities such as air are inevitably present in the sampling tube 10 during sampling, it is necessary to first introduce the in-situ liquid into the in-situ liquid heat preservation and pressure maintenance storage chamber 21. Once the in-situ liquid heat preservation and pressure maintenance storage chamber 21 is full, the subsequent liquid is heated by the heat preservation heating wire 92 to become pure hot liquid. The sample fidelity storage chamber is then driven by the pressure differential to begin collecting the pure in-situ hot liquid. When the first sample-fidelity storage chamber is filled with in-situ liquid, the controller controls the hollow servo motor 124 to rotate a predetermined angle. Since the four in-situ liquid heat-insulating and pressure-maintaining storage chambers 21 and the four second pipeline connections 14 are not arranged on the same horizontal plane, the first valve core component 126 and the second valve core component 127 block the previous liquid path and connect the sampling tube connection 15 and the second pipeline 6 of the next sample-fidelity storage mechanism 9. The above steps are then repeated.

[0042] When the sampling storage device transfers hot liquid from the sample fidelity storage chamber to the external equipment, first disconnect the connection between the sampling inner shell 12 and the accumulator, then connect the bottom of the sampling fidelity storage chamber to the pressurized transfer test equipment, complete the sample transfer under the conditions of heat and pressure maintenance, and carry out subsequent testing work.

[0043] Therefore, the present application provides a multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage device based on a manned submersible, which solves the technical problems of the existing sampling storage device in achieving multi-point heat preservation, pressure maintenance and high-purity sampling.

[0044] In this specification, references to terms such as "an experimental example," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that experimental example or example are included in at least one experimental example or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same experimental example or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more experimental examples or examples.

[0045] Finally, it should be noted that the above experimental examples are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred experimental examples, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage based on a manned submersible, characterized in that: The invention comprises a sequential sampling valve, wherein the bottom of the sequential sampling valve is connected to an in-situ liquid storage mechanism, the bottom of the in-situ liquid storage mechanism is connected to an energy storage mechanism, the energy storage mechanism is connected to a sample fidelity storage mechanism via a third pipeline, a cavity is provided inside the sequential sampling valve, a valve core component is provided in the cavity, an in-situ liquid heat preservation and pressure maintenance storage cavity is provided inside the in-situ liquid storage mechanism, the sample fidelity storage mechanism is connected to the in-situ liquid heat preservation and pressure maintenance storage cavity and the cavity via a first pipeline and a second pipeline respectively, a sampling tube connection port is provided on the sequential sampling valve, the sampling tube is connected to the cavity via the sampling tube connection port, and a driving member inside the sequential sampling valve drives the valve core component to move up and down in the cavity to connect the sampling tube on the sequential sampling valve and the second pipeline; The sequential sampling valve includes a sampling outer shell, a sampling inner shell is provided inside the sampling outer shell, a cavity is provided inside the sampling inner shell, a pressure balancing head connected to the ambient pressure is provided on the inner top of the cavity, a sliding head is connected to the inner part of the pressure balancing head through a sealing ring, the valve core parts include a first valve core part and a second valve core part, the bottom of the pressure balancing head is connected to the first valve core part, a liquid flow hole is provided on the first valve core part, and connecting holes are provided at both ends of the liquid flow hole, and an annular groove is provided at the corresponding positions of the first valve core part and the two ends of the liquid flow hole, and the annular groove includes The lower annular groove and the upper annular groove, and the sampling tube connection port are arranged on the sampling outer shell. The sampling outer shell is also provided with four in-situ liquid heat preservation and pressure maintenance storage chamber connection ports and four second pipeline connection ports. The four in-situ liquid heat preservation and pressure maintenance storage chamber connection ports and the four second pipeline connection ports are not arranged on the same horizontal plane. The sampling tube connection port is located below the second pipeline connection port. When the first valve core component connects the sampling tube connection port with the second pipeline, the in-situ liquid enters the lower annular groove from the sampling tube connection port, flows through the liquid flow hole, and enters the sample fidelity storage mechanism from the upper annular groove through the second pipeline. A second valve core part is provided at the bottom of the first valve core part, a limiting part is provided on the sampling inner shell, a hollow servo motor is built into the bottom of the limiting part, a circumferential positioning part is provided at the bottom of the hollow servo motor, the inner diameter of the limiting part corresponds to the outer diameter of the second valve core part, the hollow servo motor, the second valve core part, the limiting part and the circumferential positioning part form a screw mechanism, the hollow servo motor drives the second valve core part and the first valve core part to move up and down, a valve core placement cavity is provided at the top of the in-situ liquid storage mechanism, and the bottom of the second valve core part is provided in the valve core placement cavity; The sample fidelity storage mechanism includes a sample fidelity outer shell, a sample fidelity inner shell is provided inside the sample fidelity outer shell, a heat preservation heating wire is provided on the outside of the sample fidelity inner shell, and the heat preservation heating wire is electrically connected to a controller provided on the sample storage device. A sample fidelity storage chamber is provided inside the sample fidelity inner shell, and the bottom of the sample fidelity storage chamber is sealedly connected to the accumulator inside the energy storage mechanism through a threaded head and a third pipeline. A sealed fidelity piston is provided on the upper part of the sample fidelity storage chamber, one end of the fidelity piston is fixedly connected to the second pipeline, and the other end of the fidelity piston is connected to the first pipeline through a one-way valve; A first sealing ring and a lower sealing ring are provided on the sampling inner shell body, and a valve core sealing ring is provided at the lower end of the second valve core part. One side of the first pipeline is sealed and connected to the in-situ liquid insulation and pressure storage chamber through a piston, and the middle part of the first pipeline is arranged on the in-situ liquid insulation and pressure storage chamber connection port through a threaded head, and the other side of the first pipeline is sealed and connected to the sample fidelity inner shell through a threaded head, and the second pipeline is sealed and arranged on the second pipeline connection port through a threaded head, one side of the second pipeline is fixedly connected to the cavity, and the other side of the second pipeline is sealed and connected to the sample fidelity inner shell through a threaded head, and the sampling tube is sealed and connected to the sampling tube connection port through a threaded head.

2. The multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage based on a manned submersible according to claim 1, characterized in that: The in-situ liquid storage mechanism is fixedly connected to the sequential sampling valve and the energy storage mechanism respectively, and the three are fixedly connected to the sample fidelity storage mechanism through a fixed bracket and an outer frame.

3. The multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage based on a manned submersible according to claim 1, characterized in that: The controller is electrically connected to the energy storage mechanism, the hollow servo motor and the heat-insulating heating wire.

4. The multi-chamber deep-sea hydrothermal heat preservation and pressure maintenance sampling storage based on a manned submersible according to claim 1, characterized in that: When the multi-chamber deep-sea hydrothermal insulation and pressure maintaining sampling storage device is working, the accumulator is first pre-charged with a pressure of 3-5MPa, and the piston in the sample fidelity storage chamber is pushed to the side away from the accumulator. Then the sampling tube is aligned with the in-situ liquid, and the rotation angle of the hollow servo motor is controlled by the controller. Then the sampling tube and the second pipeline are connected, so that the in-situ liquid enters the lower annular groove from the sampling tube connection port, flows through the liquid flow hole, and enters the sample fidelity storage chamber from the upper annular groove through the second pipeline. Then the one-way valve is opened to allow the in-situ liquid to enter the in-situ liquid insulation and pressure maintaining storage chamber from the sample fidelity storage chamber. When the in-situ liquid insulation and pressure maintaining storage chamber is filled, the in-situ liquid continues to press the piston down to enter the sample fidelity storage chamber.

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