A multi-point sampling device for seabed sediments

Abstract

The present invention belongs to the field of sample collection technology, specifically a multi-point sampling device for seabed sediments, wherein a main unit is provided on the outside of the skeleton, and a collection unit is provided at the middle position inside the skeleton; the present invention cooperates with the storage cylinder through the axial feeding action of the collection cylinder to gradually collect the sediment into the interior of the storage cylinder through the through groove, and then the storage cylinder rotates a certain angle until the water groove on the outer wall of the storage cylinder is no longer connected to the water groove on the outer wall of the steel ring, so as to ensure that the storage environment of the collected seabed sediments is relatively sealed, and through the short-term circulation between the mouth groove and the double-headed plug, the relative consistency of the internal and external pressures of the storage cylinder is guaranteed, and finally, through the reciprocating motion of the spring plug, the short-term influence of the double-headed plug on the internal pressure of the storage cylinder when it undergoes external pressure changes is compensated, thereby further reducing the pressure loss problem occurring in the process of recovering and collecting samples, ensuring the stability of the pore structure of the seabed sediments, and then improving the rationality and authenticity of the research on marine environmental changes.

Description

Technical Field

[0001] The invention belongs to the technical field of sample collection, and in particular relates to a multi-point sampling device for seabed sediments. Background Art

[0002] Seabed Sediment Collector: An instrument used to obtain sediment samples from the seabed. This involves collecting mud, clay, biological debris, or various substances contained therein, such as microorganisms, minerals, and paleontological fossils, at a fixed point. This allows for research in a wide range of fields, including marine geology, marine ecology, and paleoclimate. Specifically, accurate analysis of the composition and structure of seabed sediments can be used to understand the evolution of the marine environment.

[0003] Common collection devices include gravity samplers, box samplers, piston samplers, grab samplers, and deep-sea drilling equipment. These collection methods typically utilize the relative motion between the drill pipe and the core to trap a portion of the core inside the drill pipe. This core is then hoisted and collected from an offshore platform. However, due to the relatively high water pressure in deep-sea areas, some collection equipment suffers from insufficient penetration or limited capacity, making it impossible to effectively achieve quantitative collection in a designated area.

[0004] In addition, the physical properties of seabed sediments change during the process of transferring from the high-pressure, low-temperature environment of the deep sea to the normal temperature and pressure environment of the sea surface. That is, the pressure difference caused by different seawater depths has a significant impact on seabed sediments. As the depth increases, the pressure increases and the sediments are further compressed. Therefore, the sediments collected in the high-pressure environment of the deep sea have lower porosity and closer contact between particles. When these sediments are brought to the normal pressure environment of the sea surface, due to the release of pressure, they will gradually undergo structural changes, such as increased porosity and gas escape, which will cause changes in the pore structure and density of the samples, affecting the objective study of the sediment properties.

[0005] At the same time, the traditional collectors have simple but rough steps in the sample recovery process, which means that there are certain limitations in the protection of the collected samples. In the transfer process, marine biological activities, storm invasions and ocean currents will cause the collected samples to undergo varying degrees of impact or vibration. After that, mechanical energy is converted into thermal energy, the internal temperature of the collected samples rises, and the pressure changes (liquids are generally almost incompressible. Therefore, when the seal is impacted or vibrated, the volume of the liquid remains basically unchanged. However, the force generated by the impact or vibration is transmitted through the liquid; according to Pascal's law, the pressure applied to a confined liquid can be transmitted in all directions by the liquid without changing its magnitude). Summary of the Invention

[0006] In order to solve the above problems, the present invention adopts the following technical solution: a multi-point sampling device for seabed sediments, comprising a skeleton, the cross-section of which is hexagonal, a main unit arranged on the outside of the skeleton, a collection unit arranged in the middle of the skeleton, and a balancing unit arranged on the outside of the collection unit;

[0007] The acquisition unit includes:

[0008] The stage warehouse is set in the middle position inside the frame;

[0009] There is at least one electric telescopic rod, which is circumferentially arranged in the space on one side of the stage warehouse, and the electric telescopic rod is plugged and installed between the stage warehouse;

[0010] The winch is mounted on the end of the electric telescopic rod away from the platform;

[0011] The waterproof motor is embedded and installed in the middle of the end face of the winch away from the stage;

[0012] There is at least one boom, which is circumferentially arranged on the side of the winch away from the silo, and the boom is mounted in a snap-fit ​​manner with the winch;

[0013] The ear seat is installed on the end of the boom away from the platform;

[0014] The steel ring is coaxially arranged on the side of the platform warehouse close to the boom, and the steel ring is snap-fitted with the ear seat;

[0015] The storage tube is coaxially arranged inside the steel ring, and the storage tube and the steel ring are installed in a fitting rotational manner;

[0016] The collecting tube is mounted on the end of the steel ring away from the stage bin by snap-fitting, and the collecting tube is mounted in a rotating manner with the storing tube.

[0017] Preferably, the steel ring and the outer wall of the storage tube are evenly provided with water grooves, the end surface on the side where the storage tube and the collection tube are in contact are provided with through grooves, and there is at least one through groove, and the end surface of the storage tube away from the stage is through-type snap-fitted with a column that is rotatably installed with the collection tube. In addition, the column is snap-fitted with the waterproof motor at one end away from the stage, and the end surface of the storage tube close to the stage is snap-fitted with a sealing ring that is sleeved on the outer wall of the column. A connecting ring is snap-fitted with one end of the outer ring of the end surface of the storage tube close to the stage, and a conduit is snap-fitted with the connecting ring at one end close to the stage, a one-way valve is snap-fitted with the middle position of the conduit, a cloth bag is snap-fitted with the end of the conduit away from the stage, and a spring plug that is fitted with the inner wall of the connecting ring is slidingly snap-fitted with the inner wall of the conduit close to the connecting ring.

[0018] Preferably, the other end of the outer ring of the end face of the storage tube close to the stage is plugged into a high-combination tube, and the outer wall of the high-combination tube close to the storage tube is evenly provided with grooves, and the inner wall of the high-combination tube away from the stage is clamped with a gasket, and a T-face column slidingly installed on the axis of the gasket is slidably clamped and fitted with the inner wall of the high-combination tube, and the outer wall of the T-face column close to the gasket is clamped and fitted with a ring piece, and the end of the T-face column away from the stage is clamped and fitted with a double-headed plug slidingly fitted with the inner wall of the high-combination tube, and a telescopic spring located between the gasket and the ring piece is sleeved on the outer wall of the T-face column, and an air valve is plugged into the end of the storage tube close to the stage.

[0019] Preferably, the main unit includes:

[0020] Suspended ceiling, snap-fitted and installed at one end of the frame;

[0021] The shaft seat is embedded and clamped in the middle of the end surface of the ceiling close to the frame;

[0022] The hydraulic rod is clamped and installed in the middle position of the end surface of the shaft seat away from the ceiling;

[0023] The counterweight block is clamped and installed in the middle position of the outer wall of the hydraulic rod away from the ceiling;

[0024] The chassis is snap-fitted to the end of the hydraulic rod away from the ceiling;

[0025] The corner tube is snap-fitted and installed on the end of the chassis away from the ceiling; in addition, the platform is snap-fitted and installed with the inner wall of the corner tube close to the ceiling;

[0026] The supports are evenly arranged on the outer wall of the corner tube in the circumferential direction, and the supports are installed in a sliding and clamping manner with the inner wall of the vertical section of the frame;

[0027] The baffle is circumferentially arranged on the outer wall of the vertical section of the frame, and the baffle is detachably mounted to the frame through bolts.

[0028] Preferably, the balancing unit comprises:

[0029] There is at least one hydration ring, which corresponds to the position of the electric telescopic rod. In addition, the hydration ring is mounted on the end surface of the stage away from the ceiling;

[0030] The plates are grouped in three and are circumferentially distributed on the end face of the hydration ring away from the stage;

[0031] The outer protective bracket is mounted on the middle position of the end face of the plate away from the hydration ring;

[0032] The mouth frame is clamped and installed at the middle position of the outer wall of the outer protective bracket away from the axis of the hydration ring;

[0033] The vertical rods are arranged in groups of at least two and are installed in the middle of the vertical section of the mouth frame by sliding and snap-fitting;

[0034] The return spring is sleeved and installed on the outer wall of the vertical rod, and the return spring is located between the vertical section of the mouth frame and the outer protective bracket;

[0035] The inner support plate has a cross-section of one-eighth of a circle and is mounted on one end of the vertical rod close to the axis of the hydration ring;

[0036] The temperature control component is embedded and installed on the inner wall of the inner support plate near the hydration ring;

[0037] The temperature sensor is embedded and installed on the inner wall of the inner support plate at one end away from the hydration ring.

[0038] Preferably, the angle tube and the collecting tube are circumferentially provided with continuous serrated grooves at the end away from the ceiling. In addition, the outer wall of the angle tube is provided with through holes for opposite flow. The outer diameter of the angle tube is smaller than the vertical distance between the relative collar edges of the end of the frame away from the ceiling. The end of the ceiling away from the frame is clamped with a buckle for traction and hanging.

[0039] Preferably, the cross-sectional shape of the double-headed plug is an isosceles trapezoid with a mirror image distribution, the volume of the spring plug away from the stage warehouse end is equal to the volume of the double-headed plug away from the stage warehouse end, and the cross-sectional shape of the T-face column close to the stage warehouse end is circular.

[0040] Preferably, the maximum extension amount of the electric telescopic rod is less than the vertical distance between the ear seat and the inner support plate away from the end of the stage warehouse. In addition, the inner walls of the temperature control component and the temperature sensor are in contact with the outer wall of the ear seat.

[0041] The method for collecting seabed sediments under pressure is to use the above-mentioned seabed sediment multi-point sampling device to collect the sediments under pressure. The specific steps are as follows:

[0042] S1: First, the chassis is controlled by hydraulic rods, which drive the angle tubes to move towards the target area under the guidance of the skeleton. The angle tubes collect data in the target area, providing basic protection and combing functions to reduce the impact of external marine life or turbulence.

[0043] S2: Then, through the extension and retraction of the electric telescopic rod, the boom is controlled to drive the steel ring to move toward the seabed sediment in the area circled by the corner tube until the collection tube is inserted into the specified depth of the seabed sediment. After that, the waterproof motor rotates the column to close the water tank and the through groove with the outside flow channel, and through the connectivity between the mouth groove and the storage tube, the pressure inside and outside the storage tube is relatively consistent for a certain period of time. When the seawater pressure changes, the reciprocating motion of the spring plug compensates for the temporary impact of the double-headed plug on the internal volume of the storage tube when it undergoes external pressure changes, thereby ensuring the stability of the pore structure of the seabed sediment;

[0044] S3: Finally, the elastic properties of the return spring are used to change the contact form between the inner support plate and the ear seat, thereby freeing the inner support plate and absorbing the external impact kinetic energy. This reduces the radial runout of the steel ring under the external impact, thereby reducing the frequency of mechanical energy conversion and fully ensuring the relative stability of the internal pressure of the storage tube.

[0045] The present invention has the following beneficial effects:

[0046] 1. The present invention cooperates with the storage tube through the axial feeding action of the collecting tube to gradually collect the sediment into the interior of the storage tube through the through groove. After that, the column drives the storage tube to rotate a certain angle under the control of the waterproof motor until the water groove on the outer wall of the storage tube is no longer connected to the water groove on the outer wall of the steel ring, thereby ensuring that the storage environment of the collected seabed sediment is relatively sealed, and through the temporary circulation between the mouth groove and the double-headed plug, the relative consistency of the internal and external pressures of the storage tube is guaranteed. Finally, through the reciprocating motion of the spring plug, the temporary impact of the double-headed plug on the internal pressure of the storage tube when it is subjected to external pressure changes is compensated, further reducing the pressure loss problem occurring in the process of recovering and collecting samples, which is beneficial to ensuring the stability of the pore structure of the seabed sediment, and then improving the rationality and authenticity of the research on marine environmental changes.

[0047] 2. The present invention changes the contact form between the inner support plate and the ear seat through the elastic properties of the reset spring itself, that is, through the axial elasticity of the reset spring, the contact freedom between the inner support plate and the ear seat is released, the connection and identity of the rigid contact are reduced, and the radial runout of the steel ring or the collection tube under the action of external impact is reduced to a certain extent, thereby reducing the conversion frequency of mechanical energy, fully ensuring the relative stability of the internal pressure of the storage tube, improving the state integrity of the seabed sediment when it is transferred to the sea surface, and improving the accuracy of the analysis of the seabed sediment; and through the cooperation between the temperature control component and the temperature sensor, the consistency of the temperature before and after the storage tube is further ensured, reducing the influence of microbial activity on its properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0049] Figure 2 This invention is attached Figure 1 Front view of the structure.

[0050] Figure 3 This is a diagram showing the three-dimensional structure of the corner tube in the present invention.

[0051] Figure 4 This is a three-dimensional structural diagram showing the internal collection unit and balance unit of the corner tube of the present invention.

[0052] Figure 5 This invention is attached Figure 3 Three-dimensional structure display diagram of the local structure.

[0053] Figure 6 This invention is attached Figure 4 Front view of the structure.

[0054] Figure 7 It is a three-dimensional display diagram of the local structure of the collection unit in the present invention.

[0055] Figure 8 This is a three-dimensional structural diagram of the balancing unit in the present invention.

[0056] Figure 9 This is a three-dimensional display diagram of the catheter of the present invention and its local structure.

[0057] Figure 10 This is a three-dimensional display diagram of the double-head plug of the present invention and its local structure.

[0058] Numbers in the figure: 1, skeleton; 2, main unit; 3, acquisition unit; 4, balance unit;

[0059] 21. Ceiling; 22. Axle seat; 23. Hydraulic rod; 24. Counterweight; 25. Chassis; 26. Angle tube; 27. Support; 28. Baffle;

[0060] 31. Platform; 32. Electric telescopic pole; 33. Winch; 34. Waterproof motor; 35. Boom; 36. Ear seat; 37. Steel ring; 38. Storage cylinder; 39. Collection cylinder;

[0061] 311. Water tank; 312. Through slot; 313. Column; 314. Sealing ring; 315. Connecting ring; 316. Conduit; 317. One-way valve; 318. Cloth bag; 319. Spring plug;

[0062] 321. High-pressure pipe; 322. Groove; 323. Gasket; 324. T-face column; 325. Ring; 326. Double-head plug; 327. Telescopic spring; 328. Air valve;

[0063] 41. Hydration ring; 42. Plate; 43. Outer protective bracket; 44. Mouth frame; 45. Vertical rod; 46. Return spring; 47. Inner support plate; 48. Temperature control component; 49. Temperature sensor. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0065] It should be noted that the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0066] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0067] Reference Figure 1 and Figure 3 It can be seen that a multi-point sampling device for seabed sediments includes a skeleton 1, the cross-section of the skeleton 1 is hexagonal, a main unit 2 is arranged on the outside of the skeleton 1, a collection unit 3 is arranged in the middle position inside the skeleton 1, and a balance unit 4 is arranged on the outside of the collection unit 3;

[0068] Reference Figure 1 、 Figure 2 and Figure 3 It can be seen that the main unit 2 includes: a ceiling 21, which is clamped and mounted on one end of the frame 1; an axle seat 22, which is embedded and clamped and mounted in the middle position of the end surface of the ceiling 21 close to the frame 1; a hydraulic rod 23, which is clamped and mounted in the middle position of the end surface of the axle seat 22 away from the ceiling 21; a counterweight 24, which is clamped and mounted in the middle position of the outer wall of the end of the hydraulic rod 23 away from the ceiling 21; and a chassis 25, which is clamped and mounted on the end of the hydraulic rod 23 away from the ceiling 21.

[0069] The angle tube 26 is snap-fitted to the end of the chassis 25 away from the ceiling 21. In addition, the stage 31 is snap-fitted to the inner wall of the angle tube 26 near the ceiling 21. The supports 27 are evenly arranged around the outer wall of the angle tube 26 and are slidably snap-fitted to the inner wall of the vertical section of the frame 1. The baffle 28 is circumferentially arranged on the outer wall of the vertical section of the frame 1 and is detachably mounted to the frame 1 by bolts.

[0070] Reference Figure 1 and Figure 4 It can be seen that the corner tube 26 and the collecting tube 39 are both circumferentially provided with continuous serrated grooves at the end away from the ceiling 21. In addition, the outer wall of the corner tube 26 is provided with through holes for opposite circulation. The outer diameter of the corner tube 26 is smaller than the vertical distance between the relative collar edges of the end of the frame 1 away from the ceiling 21. The end of the ceiling 21 away from the frame 1 is clamped with a buckle for traction and hanging.

[0071] Special note: For the movable parts, a protective shell is provided (not shown in the figure)

[0072] Preparation process of main unit 2 before acquisition:

[0073] When implementing:

[0074] First, the cable transfer device is connected to the ring buckle at one end of the ceiling 21 through the offshore operation platform. Then, the main unit 2 is gradually moved toward the target sea area under the action of the external cable hoisting until the end of the skeleton 1 away from the ceiling 21 contacts the seabed operation surface.

[0075] Next, the chassis 25 is controlled by the hydraulic rod 23 (the shaft seat 22 strengthens the connection stability between the hydraulic rod 23 and the ceiling 21 and reduces the difficulty of subsequent maintenance), driving the corner tube 26 to move toward the seabed sediment area until the sawtooth end of the corner tube 26 (the sawtooth shape is designed to reduce the force-bearing area, increase local pressure, reduce the difficulty of the corner tube 26 penetrating the seabed working surface, and improve the feasibility of the corner tube 26 in protecting the seabed sediment in its initial state) is inserted into the seabed working surface at a specified depth;

[0076] During this process, the baffle 28 resists the instantaneous impact of external seawater, while reducing the impact damage of marine biological activities on the main device of the present invention. The through holes provided on the outer wall of the corner tube 26 are used to cut, divert and integrate the seawater flowing into the interior of the corner tube 26 (reducing the impact of turbulence on the collection body);

[0077] Finally, through the gravity of the counterweight block 24 (in specific implementation, the specific weight of the counterweight block 24 needs to be calculated by considering multiple external factors to ensure the relative stability and smoothness of the collection body) and the sliding guide between the bracket and the skeleton 1, the stability of the main movement process of the angle tube 26 is enhanced, and the operation independence and safety of the internal collection unit 3 and the balance unit 4 in the deep sea environment are improved.

[0078] Reference Figure 4 、 Figure 5 、 Figure 6 and Figure 7 It can be seen that the collection unit 3 includes: a stage 31, which is arranged in the middle position inside the frame 1; at least one electric telescopic rod 32, which is circumferentially arranged in the space on one side of the stage 31, and the electric telescopic rod 32 is plugged and installed between the stage 31; a winch 33, which is snap-fitted and installed on the end of the electric telescopic rod 32 away from the stage 31; a waterproof motor 34, which is embedded in the middle position of the end surface of the winch 33 away from the stage 31; at least one boom 35, which is circumferentially arranged on the side of the winch 33 away from the stage 31, and the boom 35 is snap-fitted and installed between the winch 33;

[0079] The ear seat 36 is plugged and installed at the end of the boom 35 away from the stage 31; the steel ring 37 is coaxially arranged on the side of the stage 31 close to the boom 35, and the steel ring 37 and the ear seat 36 are installed in a snap-fit ​​manner; the storage cylinder 38 is coaxially arranged inside the steel ring 37, and the storage cylinder 38 and the steel ring 37 are installed in a fitting and rotatable manner; the collection cylinder 39 is snap-fitted and installed at the end of the steel ring 37 away from the stage 31, and the collection cylinder 39 and the storage cylinder 38 are installed in a rotatable manner;

[0080] Reference Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 9It can be seen that the outer walls of the steel ring 37 and the storage cylinder 38 are evenly provided with water grooves 311, and the end faces of the storage cylinder 38 and the collection cylinder 39 on the side in contact are provided with through grooves 312, and there is at least one through groove. The end face of the storage cylinder 38 away from the stage warehouse 31 is through-mounted with a column 313 that is rotatably mounted with the collection cylinder 39. In addition, the column 313 is mounted on the end of the stage warehouse 31 away from the end of the waterproof motor 34. A sealing ring 314 is sleeved on the outer wall of 313, and a connecting ring 315 is installed on the outer ring of the end surface of the storage tube 38 near the stage warehouse 31. A guide tube 316 is installed on the end of the connecting ring 315 near the stage warehouse 31. A one-way valve 317 is installed in the middle of the guide tube 316. A cloth bag 318 is installed on the end of the guide tube 316 away from the stage warehouse 31. A spring plug 319 is installed on the inner wall of the end of the guide tube 316 near the connecting ring 315 in a sliding manner.

[0081] Reference Figure 6 and Figure 10 The cam 328 is actuated by a spring 329 which is located between the top and bottom of the cam 329 and the bottom of the cam 329. The cam 329 has a first end cam 329 which is actuated by a spring 329 which is located between the top and bottom of the cam 329 and the bottom of the cam 329.

[0082] The cross-sectional shape of the double-headed plug 326 is a mirror-image isosceles trapezoid. The volume of the spring plug 319 at one end away from the stage warehouse 31 is equal to the volume of the double-headed plug 326 at one end away from the stage warehouse 31. The cross-sectional shape of the T-face column 324 at one end close to the stage warehouse 31 is circular.

[0083] The collection process of seabed sediments in the area demarcated by the diagonal tube 26 of the collection unit 3:

[0084] Take one of the collection tubes 39 as an example:

[0085] In the initial state: the water groove 311 between the steel ring 37 and the storage tube 38 is arranged opposite to each other; the through groove 312 on the contact surface of the storage tube 38 and the collection tube 39 is arranged opposite to each other;

[0086] First, under the control of the electric telescopic rod 32, the winch 33 drives the boom 35 and the ear seat 36 to move away from the platform 31 (the platform 31 protects the internal electrical components of the telescopic rod, that is, isolates the flow channel between the internal electrical components of the electric telescopic rod 32 and the external seawater, which improves the collection safety to a certain extent and increases the service life of the electric telescopic rod 32). At the same time, under the control of the ear seat 36, the steel ring 37 synchronously drives the storage cylinder 38 and the collection cylinder 39 to move away from the platform 31 until the serrated end of the collection cylinder 39 penetrates into the specified depth of the seabed working surface (when the collection cylinder 39 is subjected to the reverse force of the storage cylinder 38, the tooth surface of its toothed end generates a component of force perpendicular to the seabed working surface and a horizontal component of force. The vertical component overcomes the resistance of the seabed working surface and reduces the difficulty of the collection cylinder 39 to penetrate deep. The horizontal component reduces the difficulty of pushing the soil to both sides, accelerates the movement of the collection cylinder 39, and improves the collection efficiency).

[0087] Then, as the collecting tube 39 goes deeper, the seabed sediments, the collecting tube 39 and the receiving tube 38 generate relative motion. At this time, the seabed sediments gradually flow into the receiving tube 38 through the through groove 312. When the collecting tube 39 reaches the specified collection depth (in specific implementation, a displacement sensor can be used to monitor the single movement distance of the collecting tube 39), the electric telescopic rod 32 stops working and the waterproof motor 34 is turned on. After that, the receiving tube 38 rotates a certain angle under the joint action of the column 313 drive and the steel ring 37 support and guide until the steel ring The water groove 311 on the outer wall of 37 is completely offset from the water groove 311 on the outer wall of the storage tube 38, and the through groove 312 at the end of the storage tube 38 is completely offset from the through groove 312 at the end of the collection tube 39 (when the storage tube 38 rotates and the seabed sediment surges into the storage tube 38, the external seawater flows into the storage tube 38 through the water groove 311 (part of the seawater enters the storage tube 38 through the mouth groove 322, the double-headed plug 326 and the connecting end of the high-pressure pipe 321). Within a certain period of time, the pressure inside and outside the storage tube 38 is the same, at which time the waterproof motor 34 is turned on);

[0088] When the storage tube 38 completes its rotation: the steel ring 37, the storage tube 38 and the collection tube 39 form an area with a stable pressure (to accommodate the seabed sediments in the target area, and at this time, the internal pressure of the storage tube 38 is consistent with the pressure of the target sea area). During this period, the slot 322 is the only channel for the storage tube 38 to communicate with the external seawater (in specific implementation, the seawater pressure of the target sea area is scientifically calculated, and then a telescopic spring 327 with an appropriate elastic coefficient is provided (that is, when the storage tube 38 is in the target sea area, the telescopic spring 327 is in a natural state, and the external seawater can pass through the slot 322 and then flow into the storage tube 38 through the narrow area in the middle of the double-headed plug 326 until the pressure inside and outside the storage tube 38 is consistent)).

[0089] Finally, the electric telescopic rod 32 controls the winch 33 to drive the boom 35 to move to the initial position. At the same time, the ceiling 21 is pulled by the cable device of the offshore work platform until the frame 1 is out of the sea surface (in this process, as the storage cylinder 38 continues to rise, the sea water pressure continues to decrease (or suddenly increases in a short period of time under external interference). At this time, taking the reduction of external pressure as an example, the telescopic spring 327, under the action of the internal pressure of the storage cylinder 38, squeezes the double-headed plug 326 to move away from the collection cylinder 39 until the double-headed plug 326 is close to the "wide head" at one end of the collection cylinder 39 and closes the high-pressure pipe). 321 blocks the opening 322 for external circulation, and thereafter the internal pressure of the storage tube 38 is stable; when the external pressure increases, the spherical surface of the T-shaped column 324 at the end away from the collection tube 39 is squeezed by the external pressure, forcing it to drive the double-headed plug 326 toward the collection tube 39 until the "wide head" of the double-headed plug 326 near the end of the collection tube 39 blocks the opening 322 for external circulation of the high-pressure tube 321. That is, the double-headed plug 326 can be used to block the opening 322 regardless of how the external pressure changes, thereby maintaining the internal pressure of the storage tube 38;

[0090] And in order to compensate for the pressure change caused by the double-headed plug 326 changing the internal space of the storage tube 38 during the movement:

[0091] When the double-headed plug 326 moves toward the collecting tube 39 (compressing the internal space of the storage tube 38), the spring plug 319, which has the same volume as the double-headed plug 326 at one end near the collecting tube 39, is compressed to a certain extent under the reverse action of the internal pressure of the storage tube 38 (this ensures the consistency of the internal space volume of the front and rear storage tubes 38, and connects to the external inflation device through the angle valve to provide timely adjustment for slight changes in the internal air pressure of the storage tube 38, further ensuring the uniformity of the internal pressure of the storage tube 38).

[0092] Sealing ring 314: ensures the tightness of the connection between the column 313 and the storage tube 38 when the column 313 rotates;

[0093] Cloth bag 318: In specific implementation, an expandable rigid structure is provided inside the cloth bag 318 to resist deep-sea air pressure.

[0094] Reference Figure 4 and Figure 8It can be seen that the balancing unit 4 includes: at least one hydration ring 41, which corresponds to the position of the electric telescopic rod 32. In addition, the hydration ring 41 is snap-fitted and installed with the end face of the stage warehouse 31 away from the ceiling 21; three plates 42 are grouped together and circumferentially distributed on the end face of the hydration ring 41 away from the stage warehouse 31; an outer protective bracket 43 is snap-fitted and installed in the middle position of the end face of the plate 42 away from the hydration ring 41; a mouth frame 44 is snap-fitted and installed in the middle position of the outer wall of the end of the outer protective bracket 43 away from the axis of the hydration ring 41; and a vertical rod 45 is grouped together with at least two, and is slidably snap-fitted and installed in the middle position of the vertical section of the mouth frame 44.

[0095] A return spring 46 is sleeved and mounted on the outer wall of the vertical rod 45, and the return spring 46 is located between the vertical section of the mouth frame 44 and the outer protective bracket 43; an inner support plate 47, with a cross-sectional shape of one-eighth of a circle, is clamped and mounted on the end of the vertical rod 45 near the axis of the hydration ring 41; a temperature control component 48 is embedded in the inner wall of the inner support plate 47 near the hydration ring 41; a temperature sensor 49 is embedded in the inner wall of the inner support plate 47 away from the hydration ring 41;

[0096] The maximum extension and contraction of the electric telescopic rod 32 is less than the vertical distance between the ear seat 36 and the inner support plate 47 away from the end of the stage warehouse 31. In addition, the inner walls of the temperature control component 48 and the temperature sensor 49 are both in contact with the outer wall of the ear seat 36.

[0097] The balancing unit 4 further ensures the stability of the pressure inside the storage cylinder 38:

[0098] The constant contact between the inner support plate 47 and the ear seat 36 provides further stable support for the movement of the steel ring 37 to ensure smooth collection. On the other hand, it prevents the inner support plate 47 from separating from the ear seat 36 (after separation, the ear seat 36 will collide with the inner support plate 47 when moving to the initial position);

[0099] The axial elasticity of the return spring 46 releases the contact freedom between the inner support plate 47 and the ear seat 36, reduces the jointness and identity of the rigid contact, and to a certain extent reduces the radial runout of the steel ring 37 or the collection tube 39 under the action of external impact, thereby reducing the frequency of mechanical energy conversion, fully ensuring the relative stability of the internal pressure of the storage tube 38, improving the state integrity of the seabed sediment when it is transferred to the sea surface, and improving the accuracy of the analysis of the seabed sediment; and through the cooperation between the temperature control component 48 and the temperature sensor 49, further ensure the consistency of the temperature before and after the storage tube 38, reducing the impact of microbial activity on its properties;

[0100] It is hereby explained that the collecting tubes 39 in the present invention can work one at a time or simultaneously. Working simultaneously can realize fixed-point multi-directional collection. Working asynchronously can realize a single trip to the sea to collect seabed sediments in different sea areas.

[0101] The present invention provides a multi-point sampling device for seabed sediments. The working principle is as follows: Step 1: First, the chassis 25 is controlled by the hydraulic rod 23, driving the angle tube 26 to move toward the target area under the guidance of the frame 1. The angle tube 26 collects the target area, provides basic protection and combing effects, and reduces the impact of external marine organisms or turbulence;

[0102] Step 2: Then, under the telescopic action of the electric telescopic rod 32, the control boom 35 drives the steel ring 37 to move toward the seabed sediment in the area circled by the angle tube 26 until the collection tube 39 is inserted into the specified depth of the seabed sediment. After that, the waterproof motor 34 rotates the column 313 to close the flow channel between the water tank 311 and the through groove 312 and the outside world, and connects the opening 322 with the storage tube 38 to achieve relative consistency of the internal and external pressures of the storage tube 38 for a certain period of time. In addition, when the seawater pressure changes, the reciprocating motion of the spring plug 319 compensates for the temporary impact of the double-headed plug 326 on the internal volume of the storage tube 38 when it undergoes changes in external pressure, thereby ensuring the stability of the pore structure of the seabed sediment.

[0103] Step 3: Finally, through the elastic properties of the reset spring 46, the contact form between the inner support plate 47 and the ear seat 36 is changed, the freedom of the inner support plate 47 is liberated, the external impact kinetic energy is absorbed, and the radial runout of the steel ring 37 under the action of the external impact is reduced, thereby reducing the frequency of mechanical energy conversion and fully ensuring the relative stability of the internal pressure of the storage tube 38.

[0104] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0105] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-point sampling device for seabed sediments, comprising a frame (1), the cross-section of the frame (1) being hexagonal, and characterized in that: The skeleton (1) is provided with a main unit (2) on the outside, a collection unit (3) is provided at a middle position inside the skeleton (1), and a balancing unit (4) is provided outside the collection unit (3); the collection unit (3) comprises: a platform (31) provided at a middle position inside the skeleton (1); at least one electric telescopic rod (32) circumferentially provided in a space on one side of the platform (31), and the electric telescopic rod (32) is plugged and installed between the platform (31); a winch (33) is snap-fitted and installed at one end of the electric telescopic rod (32) away from the platform (31); a waterproof motor (34) is embedded and installed at a middle position of an end face of the winch (33) away from the platform (31); and at least one boom (35). The winch (33) is circumferentially arranged on the side away from the platform (31), and the boom (35) is mounted in a snap-fit ​​manner with the winch (33); the ear seat (36) is plug-fitted and mounted on the end of the boom (35) away from the platform (31); the steel ring (37) is coaxially arranged on the side of the platform (31) close to the boom (35), and the steel ring (37) is mounted in a snap-fit ​​manner with the ear seat (36); the storage cylinder (38) is coaxially arranged inside the steel ring (37), and the storage cylinder (38) and the steel ring (37) are mounted in a fitting rotational manner; the collection cylinder (39) is mounted in a snap-fit ​​manner on the end of the steel ring (37) away from the platform (31), and the collection cylinder (39) and the storage cylinder (38) are mounted in a rotational manner; The outer walls of the steel ring (37) and the storage cylinder (38) are uniformly provided with water grooves (311), and the end surfaces of the storage cylinder (38) and the collection cylinder (39) on the side in contact are provided with through grooves (312), and there is at least one through groove. The end surface of the storage cylinder (38) away from the stage warehouse (31) is through-mounted with a column (313) that is rotatably mounted with the collection cylinder (39). In addition, the end of the column (313) close to the stage warehouse (31) is clamped and mounted with the end of the waterproof motor (34) away from the stage warehouse (31). The end surface of the storage cylinder (38) close to the stage warehouse (31) is clamped and mounted with the column A sealing ring (314) is sleeved on the outer wall of (313), a connecting ring (315) is installed on one end of the outer ring of the end face of the storage tube (38) close to the platform (31), a conduit (316) is installed on the end of the connecting ring (315) close to the platform (31), a one-way valve (317) is installed on the middle position of the conduit (316), a cloth bag (318) is installed on the end of the conduit (316) away from the platform (31), and a spring plug (319) is installed on the inner wall of the end of the conduit (316) close to the connecting ring (315) in a sliding manner.

2. A multi-point sampling device for seabed sediments according to claim 1, characterized in that: The other end of the outer ring of the end face of the storage tube (38) close to the stage warehouse (31) is plugged with a high-joint tube (321), and the outer wall of the high-joint tube (321) close to the storage tube (38) is evenly provided with a slot (322), and the inner wall of the high-joint tube (321) away from the stage warehouse (31) is clamped with a gasket (323), and the washer (323) is slidably clamped and fitted with a T-face column (324) slidably mounted on the inner wall of the high-joint tube (321) at the axis center. The T-face column ( A ring piece (325) is clamped and installed on the outer wall of one end of the gasket (323) near the gasket (324), and a double-headed plug (326) is clamped and installed on the end of the T-face column (324) away from the stage warehouse (31) and is slidably fitted on the inner wall of the same high-height joint pipe (321). A telescopic spring (327) is sleeved and installed on the outer wall of the T-face column (324) between the gasket (323) and the ring piece (325), and an air valve (328) is plugged and installed on the end of the storage tube (38) close to the stage warehouse (31).

3. A multi-point sampling device for seabed sediments according to claim 2, characterized in that: The main unit (2) comprises: a ceiling (21) which is snap-fitted and mounted on one end of the frame (1); an axle seat (22) which is embedded and snap-fitted and mounted at the middle position of the end face of the ceiling (21) on the side close to the frame (1); a hydraulic rod (23) which is snap-fitted and mounted at the middle position of the end face of the axle seat (22) on the side away from the ceiling (21); a counterweight (24) which is snap-fitted and mounted at the middle position of the outer wall of the end of the hydraulic rod (23) away from the ceiling (21); a chassis (25) which is snap-fitted and mounted at the middle position of the outer wall of the end of the hydraulic rod (23) away from the ceiling (21); and a chassis (25) which is snap-fitted and mounted at the middle position of the outer wall of the end of the hydraulic rod (23) away from the ceiling (21). ) one end; the angle tube (26) is snap-fitted and mounted on the end of the chassis (25) away from the ceiling (21); in addition, the platform warehouse (31) is snap-fitted and mounted on the inner wall of the angle tube (26) at one end close to the ceiling (21); the support (27) is evenly arranged on the outer wall of the angle tube (26) in the circumferential direction, and the support (27) is slidably snap-fitted and mounted on the inner wall of the vertical section of the frame (1); the baffle (28) is circumferentially arranged on the outer wall of the vertical section of the frame (1), and the baffle (28) is detachably mounted on the frame (1) by bolts.

4. A multi-point sampling device for seabed sediments according to claim 3, characterized in that: The balancing unit (4) comprises: a hydration ring (41), which is at least one and corresponds to the position of the electric telescopic rod (32). In addition, the hydration ring (41) is mounted by snapping and fitting on the end face of the platform warehouse (31) away from the ceiling (21); three plates (42) are grouped together and circumferentially distributed on the end face of the hydration ring (41) away from the platform warehouse (31); an outer protective bracket (43) is snap-fitted and mounted at the middle position of the end face of the plate (42) away from the hydration ring (41); a mouth frame (44) is snap-fitted and mounted at the middle position of the outer wall of one end of the outer protective bracket (43) away from the axis of the hydration ring (41); a vertical rod (45) is mounted to the outer wall of the outer protective bracket (43) away from the axis of the hydration ring (41). The plurality of support members are arranged in groups of at least two and are slidably mounted in the middle of the vertical section of the mouth frame (44); a reset spring (46) is sleeved and mounted on the outer wall of the vertical rod (45), and the reset spring (46) is located between the vertical section of the mouth frame (44) and the outer protective bracket (43); an inner support plate (47) has a cross-sectional shape of one-eighth of a circular ring and is mounted in a snap connection at one end of the vertical rod (45) close to the axis of the hydration ring (41); a temperature control component (48) is embedded in the inner wall of the inner support plate (47) close to the hydration ring (41); and a temperature sensor (49) is embedded in the inner wall of the inner support plate (47) away from the hydration ring (41).

5. The multi-point sampling device for seabed sediments according to claim 4, characterized in that: The angle tube (26) and the collecting tube (39) are both provided with continuous zigzag grooves in the circumferential direction at the ends away from the suspended ceiling (21). In addition, the outer wall of the angle tube (26) is provided with through holes for opposite circulation. The outer diameter of the angle tube (26) is smaller than the vertical distance between the ends of the frame (1) away from the suspended ceiling (21) and the collar edges. The end of the suspended ceiling (21) away from the frame (1) is provided with a buckle for traction and hanging.

6. The multi-point sampling device for seabed sediments according to claim 5, characterized in that: The cross-sectional shape of the double-headed plug (326) is an isosceles trapezoid with mirror image distribution, the volume of the end of the spring plug (319) away from the stage warehouse (31) is equal to the volume of the end of the double-headed plug (326) away from the stage warehouse (31), and the cross-sectional shape of the end of the T-face column (324) close to the stage warehouse (31) is circular.

7. The multi-point sampling device for seabed sediments according to claim 6, characterized in that: The maximum telescopic amount of the electric telescopic rod (32) is less than the vertical distance between the ear seat (36) and the inner support plate (47) away from one end of the stage warehouse (31). In addition, the inner walls of the temperature control component (48) and the temperature sensor (49) are both in contact with the outer wall of the ear seat (36).

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