In-situ deep-sea animal capturing and pressure-maintaining sampling device and control method thereof

Abstract

The application provides a device for in-situ capturing and pressure-keeping sampling of deep-sea animals and a control method thereof, which mainly comprises a sampler and a pressure compensator, and the sampler is connected with the pressure compensator through a fluid pipeline. The sampler is provided with opposite biological capturing openings, and the inner sides of the openings are respectively provided with a capturing opening sealing cover which can make reciprocating motion. The pressure compensator is externally provided with a liquid inlet, and is internally provided with a pressure-keeping liquid cabin and a pressure balance cabin; the pressure-keeping liquid cabin is connected with the pressure balance cabin and the liquid inlet. The application has simple structure and low cost, and through the combined use of the sampler and the pressure compensator, automatic pressure compensation and pressure keeping work can be carried out after the deep-sea animals are captured, and the opposite biological capturing openings can realize rapid and continuous capturing activities, so that the efficiency of overall task execution and the stability of the preservation environment after biological capturing are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of marine scientific research equipment, specifically relating to a deep-sea animal in-situ capture and pressure-holding sampling device and its control method. Background Technology

[0002] The deep sea, as one of the most unexplored areas on Earth, is rich in biological resources, and research on it has significant scientific importance and value.

[0003] The deep-sea environment is unique, characterized by extreme conditions such as high pressure, low temperature, and darkness, which have fostered biological communities adapted to these special environments. Studying deep-sea marine life helps to understand the origin, evolution, and adaptive mechanisms of life, providing important insights for the development of life sciences.

[0004] However, the extreme environmental characteristics of the deep sea also lead to many technical challenges in deep-sea marine life research. Among these, biological capture and in-situ pressure retention techniques are key issues.

[0005] On the one hand, there is biological capture: specialized capture equipment needs to be designed to accurately capture target organisms in high-pressure, low-temperature, and dark environments, while avoiding damage to the organisms.

[0006] On the other hand, there is in-situ pressure maintenance: In order to maintain the state of deep-sea organisms under their original environmental pressure, it is necessary to develop efficient in-situ pressure maintenance technology to ensure that the pressure does not change significantly during the transfer of organisms.

[0007] In existing technologies, a common approach is to use a submersible carrying a remotely operated robot / mechanical arm, combined with specialized capture tools (such as negative pressure mechanisms and openable biological capture boxes) to capture organisms. Ideally, this method can accurately capture target organisms. While this method is relatively straightforward, easy to design initially, and readily manufactured, it suffers from complex structures, high costs, and requires numerous supporting devices, taking up valuable internal space within the submersible and making it prone to mechanical failures. Furthermore, it demands high operational skill; a failed capture attempt results in a long interval between attempts, and the low density of deep-sea organisms further complicates the process, leading to a prolonged capture cycle and overall high costs. Furthermore, in order to achieve in-situ pressure maintenance, existing equipment has also designed a separate pressure-maintaining container. The organisms in the capture tool need to be transferred to the pressure-maintaining container in the capture environment, which not only increases the complexity and cost of the equipment, but also reduces the stability and efficiency of use. Moreover, existing technologies rarely address the issue of compensating for pressure fluctuations during the pressure maintenance process. Specifically, they do not address the issue of pressure fluctuations in the pressure-resistant chamber structure caused by changes in external pressure and temperature during the submersible's descent and ascent, which leads to changes in the pressure inside the pressure-maintaining chamber of deep-sea animals. If this issue is ignored, it can cause stress in the organisms, resulting in sudden death and mission failure.

[0008] In summary, it is necessary to design a device with a simple structure and low cost that can perform in-situ efficient capture of deep-sea organisms and automated pressure compensation, so as to improve the success rate and efficiency of deep-sea animal capture and reduce the overall cost. Summary of the Invention

[0009] This invention addresses the problems existing in the prior art by providing a deep-sea animal in-situ capture and pressure-holding sampling device, which solves the aforementioned problems through improved structural design.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] On the one hand, the present invention provides a deep-sea animal in-situ capture and pressure-holding sampling device, which mainly includes a sampler and a pressure compensator; the sampler is connected to the pressure compensator through a fluid pipeline;

[0012] The sampler has a tank structure with opposing biological capture ports at both ends; each biological capture port has a capture port sealing cap on its inner side, and a reciprocating motion mechanism is provided between the capture port sealing cap and the tank structure of the sampler; the direction of motion of the reciprocating motion mechanism is perpendicular to the plane where the biological capture port is located.

[0013] The outer shell of the pressure compensator is a tank structure sealed at both ends, and is provided with at least one liquid inlet; the interior of the pressure compensator is provided with a pressure-holding liquid chamber and a piston-type pressure balance chamber.

[0014] The pressure balance chamber is equipped with a sample pressure chamber, a pressure regulating valve, and a regulating piston. The sample pressure chamber is connected to the interior of the sampler through the fluid pipeline, and the regulating piston is located at one end of the sample pressure chamber. The regulating piston moves with the pressure change of the sample pressure chamber. The regulating piston is linked to the valve core of the pressure regulating valve.

[0015] The pressure-holding liquid chamber is connected to the pressure balance chamber and the liquid inlet, respectively; when the pressure regulating valve is open, the pressure-holding liquid chamber is connected to the sample pressure chamber.

[0016] Furthermore, the biological capture port is an opening structure with an inner conical surface;

[0017] The capture port sealing cap is a plug structure with an outer conical surface.

[0018] Furthermore, the sealing cap of the capture port is made of magnetic material;

[0019] The reciprocating motion mechanism includes an elastic reset mechanism and an electromagnet;

[0020] One end of the elastic reset mechanism is fixedly connected to the outer shell of the sampler, and the other end is connected to or in contact with the sealing cap of the capture port;

[0021] The electromagnet is fixed in the sampler.

[0022] Furthermore, the capture port sealing cover is made of non-magnetic metal; the tail of the capture port sealing cover is provided with a magnet mounting groove, and a permanent magnet is fixed in the magnet mounting groove;

[0023] The reciprocating motion mechanism includes an elastic reset mechanism and an electromagnet;

[0024] One end of the elastic reset mechanism is fixedly connected to the outer shell of the sampler, and the other end is connected to or in contact with the sealing cap of the capture port;

[0025] The electromagnet is fixed in the sampler.

[0026] Furthermore, a contact sealing structure is provided between the biological capture port and the capture port sealing cap.

[0027] Furthermore, the pressure balance chamber has a two-section spliced ​​structure, including two sample pressure chambers, namely the first sample pressure chamber and the second sample pressure chamber.

[0028] Each of the sample pressure chambers is connected to the interior of the sampler via a fluid conduit;

[0029] The pressure balance chamber is also provided with a three-way connecting block in the middle, and an adjusting piston is slidably installed between the three-way connecting block and the first and second sample pressure chambers; a pressure sensing chamber is provided between the three-way connecting block and the adjusting pistons on both sides respectively;

[0030] There are two pressure regulating valves, located at both ends of the pressure balance chamber, namely a pressure-holding cone valve and a regulating cone valve; the regulating piston is fixedly connected to the valve core of the pressure regulating valve on the same side;

[0031] When the pressure-holding chamber cone valve is open, the first sample pressure chamber is connected to the pressure-holding liquid chamber; when the regulating chamber cone valve is open, the second sample pressure chamber is connected to the interior of the pressure compensator.

[0032] The pressure compensator also includes an environmental pressure chamber, which is connected to the two pressure sensing chambers respectively through the flow path of the three-way connecting block.

[0033] Furthermore, the liquid inlet includes a first liquid inlet and a second liquid inlet;

[0034] The first liquid inlet is equipped with a first ball valve, and the second liquid inlet is equipped with a second ball valve;

[0035] The first liquid inlet is connected to the pressure-holding liquid chamber, and the second liquid inlet is connected to the environmental pressure chamber.

[0036] On the other hand, the present invention also provides a control method for the above-mentioned deep-sea animal in-situ capture and pressure-holding sampling device, which includes the following steps:

[0037] S1. Before diving, install the deep-sea animal in-situ capture and pressure-holding sampling device on the submersible and turn on the switches of each flow path.

[0038] S2. Pre-charge the sampler and pressure compensator according to the task requirements, and close the switches of each flow path after reaching the preset pressure value.

[0039] S3. The submersible performs a diving mission. After reaching the operating depth, it selects to stay in a preset area and performs deep-sea seabed organism capture work by controlling the opening and closing of the biological capture port.

[0040] S4. During the submersible's return or continued descent, the pressure compensator continuously maintains and adjusts the pressure of the sampler until sampling is completed.

[0041] Furthermore, in the deep-sea seabed organism capture operation, the opposing organism capture ports move in the same direction, but have different on / off states.

[0042] Once the deep-sea organism capture operation is complete, all the organism capture ports are closed.

[0043] Furthermore, the liquid inlet includes a first liquid inlet and a second liquid inlet;

[0044] Before the diving operation, the pressure is pre-pressurized through the first liquid inlet, and the second liquid inlet is closed;

[0045] Once the operating depth is reached, the second inlet is opened for in-situ pressure regulation, and the second inlet is closed after the deep-sea organism capture operation is completed.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] This invention has a simple structure and low cost. By combining a sampler and a pressure compensator, it can automatically perform pressure compensation and pressure maintenance after deep-sea organisms are captured. Furthermore, the opposing biological capture ports can enable rapid and continuous capture activities, improving the overall efficiency of the task and the stability of the preservation environment after biological capture. Attached Figure Description

[0048] Figure 1 This is a perspective view of the device in a specific embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the internal structure of the pressure compensator in a specific embodiment of the present invention;

[0050] Figure 3 This is a cross-sectional view of the device in a specific embodiment of the present invention;

[0051] Figure 4 This is a flowchart of a method in a specific embodiment of the present invention.

[0052] In the diagram: 1. Sampler; 2. Pressure compensator; 101. Biocapture port; 102. Capture port sealing cap; 103. Watertight connector; 104. Electromagnet; 105. Spring holder; 106. Spring; 107. O-ring seal; 201. Sealing end cap; 202. Pressure balance chamber; 203. First ball valve; 204. Pressure holding liquid chamber; 205. High-pressure seawater chamber; 206. T-connector block; 207. In-situ seawater chamber; 208. Environmental pressure chamber; 209. Second sample pressure chamber; 210. Adjustment chamber cone valve core; 211. Adjustment chamber cone valve; 212. Second ball valve; 213. Pressure sensing chamber; 214. Adjustment piston; 215. First sample pressure chamber; 216. Pressure holding chamber cone valve; 217. Pressure holding chamber cone valve core; 218. End cap sealing ring. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0055] In the description of this invention, it should be understood that the relative relationships indicated by terms such as "upper," "lower," and "lateral" are based on the vertical relationship of the device in the actual application when it is installed. They are used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific position. Therefore, they should not be construed as limitations on this invention.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] It should be noted that, unless otherwise specified, the methods used in this invention are conventional methods; and the raw materials and apparatus used are, unless otherwise specified, conventional commercially available products.

[0058] This embodiment provides a device for in-situ capture and pressure-holding sampling of deep-sea animals, such as... Figure 1 As shown, it mainly includes a sampler 1 and a pressure compensator 2. The sampler 1 is connected to the pressure compensator 2 through a fluid pipeline and is simultaneously fixed to the sampling basket of the submersible or the end of the robotic arm.

[0059] Combination Figure 3 As shown, the sampler 1 in this embodiment is a horizontally arranged tank structure with opposing biocapture ports 101 at both ends. Optionally, taking two biocapture ports 101 as an example, both are opening structures with inner conical surfaces, and the end face of the sampler 1 is designed as an integral structure with the shell, increasing the overall pressure-bearing capacity of the sampler 1 and reducing the risk of pressure leakage. Correspondingly, each biocapture port 101 has a capture port sealing cap 102 on its inner side, which is a plug structure with an outer conical surface, which can seal with the biocapture port 101 with a conical surface, thereby improving its sealing performance. Especially during the floating stage, the internal pressure is greater than the external pressure, which can make the conical surface fit more tightly and improve the sealing performance. Furthermore, in order to achieve effective sealing during the in-situ capture stage, an annular groove is also processed on the outer conical surface of the capture port sealing cap 102, and an O-ring 107 is installed, thereby increasing the in-situ sealing performance through a contact sealing structure.

[0060] A reciprocating motion mechanism is also provided between the capture port sealing cap 102 and the tank structure of the sampler 1. In this embodiment, the capture port sealing cap 102 is made of magnetic material, and the reciprocating motion mechanism includes an elastic reset mechanism and an electromagnet. Figure 3As shown, when each capture port sealing cover 102 is in the sealed position, an electromagnet 104 is installed at a certain distance from its tail end, and is fixedly connected to the housing of the sampler 1 via a fixed bracket. The elastic reset mechanism includes a spring 106 and a spring holder 105. Each capture port sealing cover 102 has an annular spring holder 105 at its tail end, and the capture port sealing cover 102 is slidably connected to the spring holder 105. The spring holder 105 is fixedly connected to the housing of the sampler 1, and the spring 106 is fitted at the tail end of the capture port sealing cover 102. One end of the spring 106 is fixedly connected to the spring holder 105, and the other end abuts against the outer edge of the cap of the capture port sealing cover 102. Under a certain preload condition, the spring 106 can push the capture port sealing cover 102 to seal, and after the electromagnet 104 is energized, the capture port sealing cover 102 is pulled back, thereby completing the opening and closing of the capture port sealing cover 102. Therefore, the opening and closing working direction, that is, the movement direction of the capture port sealing cover 102, is perpendicular to the plane where the biological capture port 101 is located.

[0061] Optionally, the power of the electromagnet 104 is provided by a cable. Therefore, in this embodiment, a watertight connector 103 is installed by drilling a hole in the top of the sampler 1 to connect the cable of the submersible, and the electromagnet 104 is connected inside by a cable to enable the submersible to control the on and off operation of the electromagnet 104.

[0062] In another embodiment, a preferred design is to replace the material of the capture port sealing cap 102 with a non-magnetic metal, such as copper. The capture port sealing cap 102 also has an external conical plug structure, but it has a concave cylindrical magnet mounting groove at its tail, in which a permanent magnet is fixed. This design aims to address situations where external pressure increases. When the submersible continues to descend for other tasks, the external pressure may exceed the internal pressure of the sampler 1. Relying solely on the spring for sealing limits the applicable depth range, especially when the electromagnet power is significantly limited. Therefore, adding a permanent magnet allows the electromagnet 104 to be reverse-energized when needed, applying an outward thrust to the capture port sealing cap 102. Combined with the thrust of the spring 106, this allows for a wider range of depth increases (increased descent pressure compared to the capture position pressure) while maintaining good sealing performance. Furthermore, the good deformability of copper further enhances the performance of the conical seal.

[0063] like Figure 2 and Figure 3As shown, the outer shell of the pressure compensator 2 is a tank structure sealed at both ends, comprising a cylindrical hollow tube and sealing end caps 201 at both ends, which are sealed together by bolts, and an end cap sealing ring 218 is provided between the sealing end cap 201 and the hollow tube. The two sealing end caps 201 of the pressure compensator 2 are respectively provided with a liquid inlet, namely a first liquid inlet and a second liquid inlet, with a first ball valve 203 installed at the first liquid inlet and a second ball valve 212 installed at the second liquid inlet.

[0064] The pressure compensator 2 internally comprises a pressure-holding liquid chamber 204 and a piston-type pressure balancing chamber 202. Optionally, in this embodiment, the pressure balancing chamber 202 is a two-section spliced ​​structure, consisting of two cylindrical chambers joined together, with a three-way connecting block 206 in the middle, and an internal T-shaped flow path. An adjusting piston 214 is installed on each side of the three-way connecting block 206, and the empty area between the three-way connecting block 206 and the adjusting piston 214 is a pressure sensing chamber 213, thereby connecting the two pressure sensing chambers 213. The adjusting piston 214 can slide within the chamber of the pressure balancing chamber 202. Pressure regulating valves are installed at both ends of the pressure balancing chamber 202, namely a pressure-holding chamber cone valve 216 and an adjusting chamber cone valve 211. A first sample pressure chamber 215 is provided between the pressure-holding chamber cone valve 216 and the adjusting piston 214 on the left side, and the first sample pressure chamber 215 is connected to the internal cavity of the sampler 1 through a separate fluid pipe. A second sample pressure chamber 209 is provided between the regulating cone valve 211 and the regulating piston 214 therebetween, and the second sample pressure chamber 209 is also connected to the internal cavity of the sampler 1 through a separate fluid pipe. Both regulating pistons 214 are fixedly connected to the valve cores of the pressure regulating valves on the same side by connecting rods. The valve cores 217 of the pressure holding chamber cone valve and 210 of the regulating chamber cone valve open and close in the same direction. When the regulating piston 214 slides to the left, the valve core opens, and when it moves to the right, the valve core closes.

[0065] When the pressure-holding chamber cone valve 216 is opened, the first sample pressure chamber 215 is connected to the pressure-holding liquid chamber 204; when the regulating chamber cone valve 211 is opened, the second sample pressure chamber 209 is connected to the inside of the pressure compensator 2.

[0066] The pressure-holding liquid chamber 204 is a liquid storage pressure bottle with a high-pressure seawater chamber 205 inside, which is connected to the pressure balance chamber 202 and the first liquid inlet through pipelines.

[0067] The pressure compensator 2 is also equipped with an environmental pressure chamber 208, which is also a liquid storage pressure bottle. Inside is an in-situ seawater chamber 207, which is connected to two pressure sensing chambers 213 through the flow path of the three-way connecting block 206, and connected to the second liquid inlet through a pipeline.

[0068] like Figure 4As shown, this embodiment, based on the above embodiments, also provides a control method for a deep-sea animal in-situ capture and pressure-holding sampling device, which includes the following steps:

[0069] S1. Before diving, mount the deep-sea animal in-situ capture and pressure-holding sampling device on the ROV sampling basket or robotic arm of the submersible, and turn on the switches of each flow path to connect the compartments that need to be adjusted.

[0070] S2. Calculate the pressure at the working depth according to the task requirements, then open the first ball valve to pre-pressurize the pressure-holding liquid tank of the pressure compensator, that is, fill it with high-pressure seawater to reach the preset pressure value (which matches the pressure at the intended working depth), and then close the first ball valve.

[0071] S3. The submersible performs a diving mission. After reaching the operating depth, it chooses to stay in the preset area and opens the second ball valve through the robotic arm.

[0072] Deep-sea organisms are captured by controlling the opening and closing of the biological capture ports. Optionally, during the deep-sea organism capture process, the opposing biological capture ports move in the same direction but have different opening and closing states. Specifically, in this embodiment, the two opposing biological capture ports can be used in a way where one is closed and the other is open during the capture process. When a target organism is detected, the closed biological capture port is brought close to the target organism. After reaching a suitable distance, the biological capture port opens, while the opposite biological capture port closes, thereby allowing the organism to be sucked in through negative pressure. If the capture fails, the sampler's orientation is quickly changed, and the closed biological capture port on the other side is moved to the vicinity of the target organism to start a second capture. This design can achieve continuous and rapid capture. The negative pressure suction method that simulates biological swallowing does not require the support of a separate negative pressure device. Furthermore, during the subsequent closing process, the pressure inside the sampler is kept moderate by relying on the diversion characteristics of the cone surface, and the backflow during the closing process can also keep the target organism inside the sampler.

[0073] After the capture is completed, the electromagnet is de-energized or energized in reverse through the watertight connector, so that the two biological capture ports close synchronously.

[0074] The second ball valve is closed using a robotic arm;

[0075] S4. During the submersible's return or continued descent, the pressure compensator continuously maintains and adjusts the pressure of the sampler until sampling is completed.

[0076] The adjustment process of the pressure compensator is divided into two types according to the requirements of subsequent tasks:

[0077] S41. The submersible surfaces and returns to the deck;

[0078] S411. At this time, due to the decrease in external pressure, the sampler will undergo axial and radial deformation under the action of internal pressure, which will inevitably cause fluctuation in the volume inside the cylinder and a decrease in pressure.

[0079] S412. Because the pressure inside the environmental pressure chamber and the pressure sensing chamber is the working environment pressure and the pressure remains constant under the action of the outer shell (pressure isolation tank) of the pressure compensator, the left and right adjusting pistons in the pressure balance chamber move to the left and right sides respectively.

[0080] S413. As the left-side adjusting piston moves to the left, it pushes the pressure-holding chamber cone valve to open through the connecting rod. The high-pressure seawater in the pressure-holding liquid chamber flows into the first sample pressure chamber through the cone valve to the sampler, completing the pressure compensation. This process continues until the pressure in the sampler is balanced with the pressure in the environmental pressure chamber.

[0081] S42. As the submersible continues to descend to greater depths;

[0082] S421. At this time, due to the increase in external pressure, the biofidelity cylinder will undergo axial and radial compression under the action of external pressure, which will inevitably cause volume fluctuations inside the cylinder and increase pressure.

[0083] S422. Because the pressure inside the environmental pressure chamber and the pressure sensing chamber is the working environment pressure and the pressure remains constant under the action of the outer shell (pressure isolation tank) of the pressure compensator, the left and right regulating pistons in the pressure balance chamber move toward the three-way connecting block respectively.

[0084] S423. As the right-side adjusting piston moves to the left, it pulls the adjusting chamber cone valve open via the connecting rod. The high-pressure seawater in the sampler flows into the second sample pressure chamber and through the adjusting chamber cone valve into the pressure compensator, completing the depressurization of the sampler. This process continues until the pressure in the sampler is balanced with the pressure in the environmental pressure chamber.

[0085] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A device for in-situ capture and pressure-holding sampling of deep-sea animals, characterized in that: It includes a sampler and a pressure compensator; the sampler is connected to the pressure compensator via a fluid pipeline; The sampler has a tank structure with opposing biological capture ports at both ends; each biological capture port has a capture port sealing cap on its inner side, and a reciprocating motion mechanism is provided between the capture port sealing cap and the tank structure of the sampler; the direction of motion of the reciprocating motion mechanism is perpendicular to the plane where the biological capture port is located. The outer shell of the pressure compensator is a tank structure sealed at both ends, and is provided with at least one liquid inlet; the interior of the pressure compensator is provided with a pressure-holding liquid chamber and a piston-type pressure balance chamber. The pressure balance chamber is equipped with a sample pressure chamber, a pressure regulating valve, and a regulating piston. The sample pressure chamber is connected to the interior of the sampler through the fluid pipeline, and the regulating piston is located at one end of the sample pressure chamber. The regulating piston moves with the pressure change of the sample pressure chamber. The regulating piston is linked to the valve core of the pressure regulating valve. The pressure-holding liquid chamber is connected to the pressure balance chamber and the liquid inlet, respectively; when the pressure regulating valve is open, the pressure-holding liquid chamber is connected to the sample pressure chamber. The pressure balance chamber has a two-section spliced ​​structure, including two sample pressure chambers, namely the first sample pressure chamber and the second sample pressure chamber. Each of the sample pressure chambers is connected to the interior of the sampler via a fluid conduit; The pressure balance chamber is also provided with a three-way connecting block in the middle, and an adjusting piston is slidably installed between the three-way connecting block and the first and second sample pressure chambers; a pressure sensing chamber is provided between the three-way connecting block and the adjusting pistons on both sides respectively; There are two pressure regulating valves, located at both ends of the pressure balance chamber, namely a pressure-holding cone valve and a regulating cone valve; the regulating piston is fixedly connected to the valve core of the pressure regulating valve on the same side; When the pressure-holding chamber cone valve is open, the first sample pressure chamber is connected to the pressure-holding liquid chamber; when the regulating chamber cone valve is open, the second sample pressure chamber is connected to the interior of the pressure compensator. The pressure compensator also includes an environmental pressure chamber, which is connected to the two pressure sensing chambers respectively through the flow path of the three-way connecting block.

2. The deep-sea animal in-situ capture and pressure-holding sampling device according to claim 1, characterized in that: The biological capture port is an opening structure with an inner conical surface; The capture port sealing cap is a plug structure with an outer conical surface.

3. The deep-sea animal in-situ capture and pressure-holding sampling device according to claim 1 or 2, characterized in that: The capture port sealing cap is made of magnetic material; The reciprocating motion mechanism includes an elastic reset mechanism and an electromagnet; One end of the elastic reset mechanism is fixedly connected to the outer shell of the sampler, and the other end is connected to or in contact with the sealing cap of the capture port; The electromagnet is fixed in the sampler.

4. The deep-sea animal in-situ capture and pressure-holding sampling device according to claim 1 or 2, characterized in that: The capture port sealing cover is made of non-magnetic metal; the tail of the capture port sealing cover is provided with a magnet mounting groove, and a permanent magnet is fixed in the magnet mounting groove; The reciprocating motion mechanism includes an elastic reset mechanism and an electromagnet; One end of the elastic reset mechanism is fixedly connected to the outer shell of the sampler, and the other end is connected to or in contact with the sealing cap of the capture port; The electromagnet is fixed in the sampler.

5. The deep-sea animal in-situ capture and pressure-holding sampling device according to claim 1, characterized in that: A contact sealing structure is provided between the biological capture port and the capture port sealing cap.

6. The deep-sea animal in-situ capture and pressure-holding sampling device according to claim 1, characterized in that: The liquid inlet includes a first liquid inlet and a second liquid inlet; The first liquid inlet is equipped with a first ball valve, and the second liquid inlet is equipped with a second ball valve; The first liquid inlet is connected to the pressure-holding liquid chamber, and the second liquid inlet is connected to the environmental pressure chamber.

7. A control method for the in-situ capture and pressure-holding sampling device for deep-sea animals as described in any of the preceding claims, characterized in that: Includes the following steps: S1. Before diving, install the deep-sea animal in-situ capture and pressure-holding sampling device on the submersible and turn on the switches of each flow path. S2. Pre-charge the sampler and pressure compensator according to the task requirements, and close the switches of each flow path after reaching the preset pressure value. S3. The submersible performs a diving mission. After reaching the operating depth, it selects to stay in a preset area and performs deep-sea seabed organism capture work by controlling the opening and closing of the biological capture port. S4. During the submersible's return or continued descent, the pressure compensator continuously maintains and adjusts the pressure of the sampler until sampling is completed.

8. The control method according to claim 7, characterized in that: In the deep-sea seabed organism capture operation, the opposing organism capture ports move in the same direction, but have different on / off states. Once the deep-sea organism capture operation is complete, all the organism capture ports are closed.

9. The control method according to claim 7, characterized in that: The liquid inlet includes a first liquid inlet and a second liquid inlet, the first liquid inlet being connected to the pressure-holding liquid chamber and the second liquid inlet being connected to the environmental pressure chamber; Before the diving operation, the pressure is pre-pressurized through the first liquid inlet, and the second liquid inlet is closed; Once the operating depth is reached, the second inlet is opened for in-situ pressure regulation, and the second inlet is closed after the deep-sea organism capture operation is completed.

Images