Multipoint sampling device for seabed sediments

Abstract

The invention belongs to the technical field of sample collection, and particularly relates to a seabed sediment multipoint sampling device, which is characterized in that a main body unit is arranged outside a framework, and a collection unit is arranged in the middle of the interior of the framework; the axial feeding action of the collecting cylinder is matched with the containing cylinder, sediment is gradually collected into the containing cylinder through the through groove, then the containing cylinder rotates by a certain angle till the water tank on the outer wall of the containing cylinder does not communicate with the water tank on the outer wall of the steel ring, and therefore it is ensured that the containing environment of the collected seabed sediment is relatively sealed; the internal pressure and the external pressure of the storage barrel are ensured to be relatively consistent through transient circulation between the opening groove and the double-head plug, and finally, transient influence on the internal pressure of the storage barrel when the double-head plug is subjected to external pressure change is compensated through reciprocating motion of the spring plug, so that the problem of pressure loss in a sample recovery and collection process is further reduced; the stability of the pore structure of the seabed sediment is guaranteed, and the rationality and authenticity of research on marine environment change are further improved.

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, that is, to collect seabed mud, clay, biological remains or various substances contained therein, such as microorganisms, minerals and paleontological fossils, etc., at a fixed point; thereby achieving research in many fields such as marine geology, marine ecology and paleoclimate, that is, to understand the evolution of the marine environment by accurately analyzing the composition and structure of seabed sediments;

[0003] Common collection devices include gravity samplers, box samplers, piston samplers, grab samplers and deep-sea drilling equipment. The aforementioned collection methods usually utilize the relative movement between the drill pipe and the core to trap part of the core inside the drill pipe, and then collect it by hoisting through an offshore operating platform. During this process, due to the relatively high water pressure in the deep sea area, some collection equipment has problems such as insufficient penetration ability or limited equipment capacity, and thus cannot effectively achieve the quantitative collection task in the designated area;

[0004] In addition, the physical properties of seabed sediments change during the process of transferring from deep-sea high-pressure and low-temperature environments 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 deep-sea high-pressure environment 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, structural changes will gradually occur, such as increased porosity, gas escape, etc., resulting in changes in the pore structure and density of the samples, affecting the objective study of the properties of the sediments.

[0005] At the same time, the traditional collector has simple but rough steps in the sample recovery process, that is, there are certain limitations in the protection of the collected samples. In the transfer process, marine biological activities, storm invasions and ocean current erosion will cause the collected samples to experience different degrees of impact or vibration. After that, the mechanical energy is converted into thermal energy, the internal temperature of the collected sample 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 by the liquid in all directions 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 is arranged outside the skeleton, a collection unit is arranged in the middle position inside the skeleton, and a balance unit is arranged outside the collection unit;

[0007] The acquisition unit comprises:

[0008] The stage warehouse is arranged 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 surface of the winch away from the stage;

[0012] There is at least one suspension rod, which is circumferentially arranged on the side of the winch away from the silo, and the suspension rod is installed with the winch in a snap-fitting manner;

[0013] The ear seat is installed at the end of the boom away from the stage;

[0014] The steel ring is coaxially arranged on the side of the stage warehouse close to the boom, and the steel ring is installed with the ear seat in a snap-fitting manner;

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

[0016] The collecting tube is mounted at one end of the steel ring away from the bin through a snap-fit ​​connection, and the collecting tube is mounted in a rotating and fitting manner with the storing tube.

[0017] Preferably, the steel ring and the outer wall of the storage cylinder are evenly provided with water grooves, the end surface on the side where the storage cylinder and the collecting cylinder are in contact are provided with through grooves, and there is at least one through groove; a column is installed through the end surface of the storage cylinder away from the warehouse and is rotatably cooperated with the collecting cylinder. In addition, the column is installed with an end close to the warehouse and is installed with an end of the waterproof motor away from the warehouse, and a sealing ring is installed with a sleeve on the outer wall of the column on the end surface of the storage cylinder close to the warehouse, and a connecting ring is installed with a connecting ring at one end of the outer ring of the end surface of the storage cylinder close to the warehouse, and a conduit is installed with a connecting ring at one end of the connecting ring close to the warehouse, and a one-way valve is installed with a connecting valve in the middle position of the conduit, and a cloth bag is installed with a cloth bag at one end of the conduit away from the warehouse, and a spring plug is installed with a spring plug that fits the inner wall of the connecting ring and is slidably connected to the inner wall of the conduit close to the connecting ring.

[0018] Preferably, a high-combination tube is installed on the other end of the outer ring of the end face of the storage tube close to the stage, and grooves are evenly opened on the outer wall of the high-combination tube close to the storage tube. A gasket is installed on the inner wall of the end of the high-combination tube away from the stage, and a T-face column is installed at the axis of the gasket in a sliding manner and is installed with the same sliding connection as the inner wall of the high-combination tube. A ring piece is installed on the outer wall of the T-face column close to the gasket, and a double-headed plug is installed on the end of the T-face column away from the stage, and a telescopic spring located between the gasket and the ring piece is installed on the outer wall of the T-face column, and an air valve is installed on the end of the storage tube close to the stage.

[0019] Preferably, the main unit comprises:

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

[0021] The shaft seat is embedded and clamped and installed 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 of the end surface of the shaft seat away from the ceiling;

[0023] The counterweight block is mounted on the middle of the outer wall of the hydraulic rod at the end away from the ceiling;

[0024] The chassis is mounted on the end of the hydraulic rod away from the ceiling;

[0025] The corner tube is mounted on the end of the chassis away from the ceiling by snap-fitting; in addition, the platform is mounted on the inner wall of the corner tube close to the ceiling by snap-fitting;

[0026] The supports are evenly arranged on the outer wall of the angle 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 on the frame by 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 installed by snapping and matching with the end surface of the stage warehouse away from the ceiling;

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

[0031] The outer protective bracket is mounted on the middle position of the end surface 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 frame by sliding and snap-fitting;

[0034] A 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-sectional shape of one eighth of a circular ring and is clamped and installed at one end of the vertical rod close to the axis of the hydration ring;

[0036] A temperature control component, 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 corner tube and the collecting tube are both circumferentially provided with continuous serrated grooves at the end away from the ceiling. In addition, the outer wall of the corner tube is provided with through holes for opposite flow. The outer diameter of the corner 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 at one end away from the stage warehouse is equal to the volume of the double-headed plug at one end away from the stage warehouse, and the cross-sectional shape of the T-face column near one end of the stage warehouse is a circle.

[0040] Preferably, the maximum extension amount of the electric telescopic rod is smaller 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 both 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 under pressure, and the specific steps are as follows:

[0042] S1: First, the chassis is controlled by hydraulic rods to drive the angle tube to move to the target area under the guidance of the skeleton. The angle tube collects the target area, provides basic protection and combing effects, and reduces the impact of external marine life or turbulence;

[0043] S2: Then, through the telescopic action of the electric telescopic rod, the suspension rod 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 to the specified depth of the seabed sediment. After that, the waterproof motor is used to rotate 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 relative consistency of the pressure inside and outside the storage tube is achieved within 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, liberating the freedom of the inner support plate, absorbing the external impact kinetic energy, and reducing 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 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 with 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 short-term circulation between the mouth groove and the double-headed plug, the relative consistency of the pressure inside and outside the storage tube is guaranteed. 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 tube when it is subjected to external pressure changes is compensated, thereby 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 the changes in the marine environment.

[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 external impact is reduced to a certain extent, thereby reducing the frequency of mechanical energy conversion, 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 The present invention is attached Figure 1 Front view of the structure.

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

[0051] Figure 4 It is a three-dimensional structure display diagram of the internal collection unit and the balance unit of the corner tube of the present invention.

[0052] Figure 5 The present invention is attached Figure 3 A three-dimensional structural display of the local structure.

[0053] Figure 6 The present 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 It is a three-dimensional structural diagram of the balance unit in the present invention.

[0056] Fig. 9 It is a three-dimensional display diagram of the catheter of the present invention and the local structure thereon.

[0057] Fig.10 It 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. Warehouse; 32. Electric telescopic rod; 33. Winch; 34. Waterproof motor; 35. Hanging rod; 36. Ear seat; 37. Steel ring; 38. Storage cylinder; 39. Collection cylinder;

[0061] 311, water tank; 312, through groove; 313, column; 314, sealing ring; 315, connecting ring; 316, catheter; 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 piece; 326, double-head plug; 327, telescopic spring; 328, air valve;

[0063] 41. Hydration ring; 42. Sheet plate; 43. External protective bracket; 44. Mouth bracket; 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 solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 in this document are only for the purpose of explanation and do not represent the only implementation method.

[0066] The specific implementation of the present invention is described in detail below in conjunction with 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 outside the skeleton 1, a collection unit 3 is arranged in the middle position inside the skeleton 1, and a balance unit 4 is arranged outside 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 installed at one end of the frame 1; an axle seat 22, which is embedded and clamped and installed at the middle position of the end surface of the ceiling 21 close to the frame 1; a hydraulic rod 23, which is clamped and installed at the middle position of the end surface of the axle seat 22 away from the ceiling 21; a counterweight 24, which is clamped and installed 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 clamped and installed at the end of the hydraulic rod 23 away from the ceiling 21;

[0069] The angle tube 26 is mounted on the end of the chassis 25 away from the ceiling 21 by snap-fitting; in addition, the stage bin 31 is mounted on the inner wall of the angle tube 26 close to the ceiling 21 by snap-fitting; the support 27 is evenly arranged on the outer wall of the angle tube 26 in the circumferential direction, and the support 27 is mounted on the inner wall of the vertical section of the frame 1 by sliding snap-fitting; the baffle 28 is arranged on the outer wall of the vertical section of the frame 1 in the circumferential direction, and the baffle 28 is detachably mounted on 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 flow. 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] Hereby note: A protective shell is provided for the outside of the moving parts (not shown in the figure)

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

[0073] When implementing:

[0074] First, through the offshore operation platform, the cable migration device is used to connect the ring buckle at one end of the ceiling 21, and 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 frame 1 away from the ceiling 21 contacts the seabed operation surface;

[0075] Next, the chassis 25 is controlled by the hydraulic rod 23 (the connection stability between the hydraulic rod 23 and the ceiling 21 is strengthened by the shaft seat 22, and the difficulty of later maintenance is reduced) to drive the corner tube 26 to move toward the seabed sediment area until the sawtooth end of the corner tube 26 (the sawtooth shape is set for the purpose of reducing the force area, increasing the local pressure, reducing the difficulty of the corner tube 26 penetrating into the seabed working surface, and improving the feasibility of the corner tube 26 protecting the initial state of the seabed sediment) is inserted into the specified depth of the seabed working surface;

[0076] In this process, the baffle 28 is used to resist the instantaneous impact of the external seawater, while reducing the impact damage of marine biological activities on the main device of the present invention, and the seawater flowing into the corner tube 26 is cut, split and integrated through the through holes arranged opposite to each other on the outer wall 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 the 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 acquisition 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 at the end of the electric telescopic rod 32 away from the stage 31; a waterproof motor 34, which is embedded and installed in the middle position of the end surface of the winch 33 away from the stage 31; at least one suspension rod 35, which is circumferentially arranged on the side of the winch 33 away from the stage 31, and the suspension rod 35 is snap-fitted and installed with the winch 33;

[0079] The ear seat 36 is plug-fitted and installed at the end of the suspension rod 35 away from the stage warehouse 31; the steel ring 37 is coaxially arranged on the side of the stage warehouse 31 close to the suspension rod 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 close-fitting rotational manner; the collection cylinder 39 is snap-fitted and installed at the end of the steel ring 37 away from the stage warehouse 31, and the collection cylinder 39 and the storage cylinder 38 are installed in a rotational manner;

[0080] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig. 9It can be seen that the outer walls of the steel ring 37 and the storage cylinder 38 are uniformly 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 312, and the end face of the storage cylinder 38 away from the stage warehouse 31 is through-type clamped and installed 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 installed with the waterproof motor 34 away from the stage warehouse 31, and the end face of the storage cylinder 38 close to the stage warehouse 31 is clamped and installed with the column A sealing ring 314 is sleeved and installed on the outer wall of 313, a connecting ring 315 is installed on the outer ring of the end surface of the storage tube 38 close to the stage warehouse 31, a guide tube 316 is installed on the connecting ring 315 close to the stage warehouse 31, a one-way valve 317 is installed on the middle position 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, and a spring plug 319 is installed on the inner wall of the connecting ring 315 close to the end of the guide tube 316 slidingly and fittingly;

[0081] Reference Figure 6 and Fig.10 It can be known that a high-combination tube 321 is installed at the other end of the outer ring of the end surface of the storage tube 38 close to the stage 31, and a groove 322 is evenly opened on the outer wall of the high-combination tube 321 close to the storage tube 38. A gasket 323 is installed on the inner wall of the high-combination tube 321 away from the stage 31. A T-face column 324 is installed at the axis of the gasket 323 and is slidably installed with the same inner wall of the high-combination tube 321. A ring piece 325 is installed on the outer wall of the T-face column 324 close to the gasket 323. A double-headed plug 326 is installed on the end of the T-face column 324 away from the stage 31. A telescopic spring 327 is sleeved on the outer wall of the T-face column 324 between the gasket 323 and the ring piece 325. An air valve 328 is installed at the end of the storage tube 38 close to the stage 31.

[0082] The cross-sectional shape of the double-headed plug 326 is a mirror-image isosceles trapezoid, 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.

[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 stage warehouse 31 (the stage warehouse 31 protects and drives the internal electrical components of the telescopic rod, that is, the flow channel between the internal electrical components of the electric telescopic rod 32 and the external seawater is isolated, 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 stage warehouse 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 force perpendicular to the seabed working surface and a horizontal component force. The vertical component force overcomes the resistance of the seabed working surface and reduces the difficulty of the collection cylinder 39 to penetrate deeply. The horizontal component force reduces the difficulty of pushing the soil to both sides, accelerates the movement of the collection cylinder 39, and improves the collection efficiency).

[0087] Next, as the collecting tube 39 goes deeper, the seabed sediments, the collecting tube 39 and the storage tube 38 generate relative movement. At this time, the seabed sediments gradually flow into the storage tube 38 through the through groove 312, and when the collecting tube 39 reaches the specified collecting depth (in specific implementation, a displacement sensor can be used to monitor the single moving distance of the collecting tube 39), the electric telescopic rod 32 stops working and the waterproof motor 34 is turned on. After that, the storage tube 38 is driven by the column 313 and supported and guided by the steel ring 37, and rotates a certain angle until the steel ring The water groove 311 on the outer wall of 37 is completely staggered with 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 staggered with the through groove 312 at the end of the collection tube 39 (when the storage tube 38 rotates, the seabed sediment surges into the storage tube 38, and the external seawater flows into the storage tube 38 through the water groove 311 (partial seawater enters the storage tube 38 through the mouth groove 322 via the double-headed plug 326 and the connection end of the high-combination pipe 321), and within a certain period of time, the pressure inside and outside the storage tube 38 is consistent, and the waterproof motor 34 is turned on at this time);

[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 pressure equivalent to stability (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 equipped with a telescopic spring 327 with an appropriate elastic coefficient (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 to 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 tube 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, take the external pressure reduction as an example: the telescopic spring 327, under the action of the internal pressure of the storage tube 38, squeezes the double-headed plug 326 to move away from the collection tube 39 until the double-headed plug 326 is close to the "wide head" at one end of the collection tube 39 to close the high-pressure tube 321 is blocked from 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-face column 324 at one end away from the collection tube 39 is squeezed by the external pressure, forcing it to drive the double-headed plug 326 to move toward the collection tube 39, until the "wide head" of the double-headed plug 326 at one end close to the collection tube 39 blocks the opening 322 for external circulation of the high-combination tube 321, that is, the double-headed plug 326 can be used to block the opening 322 regardless of how the external pressure changes, so as to maintain the internal pressure of the storage tube 38);

[0090] 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 direction close to 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 close to the collecting tube 39, is compressed to a certain extent under the reverse action of the internal pressure of the storage tube 38 (thereby ensuring the consistency of the internal space volume of the front and rear storage tubes 38, and connecting to the external inflation device through the angle valve to provide timely adjustment for the slight change of 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 sealing of the connection between the column 313 and the storage tube 38 when the column 313 rotates;

[0093] Cloth bag 318: In a specific implementation, a rigid structure that can be expanded 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 mounted by snapping and matching 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; the outer protective bracket 43 is snap-fitted and mounted in the middle position of the end face of the plate 42 away from the hydration ring 41; the mouth frame 44 is snap-fitted and mounted 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; the vertical rod 45 is at least two in a group, and is slidably snap-fitted and mounted in the middle position of the vertical section of the mouth frame 44;

[0095] The reset spring 46 is sleeved and installed 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; the inner support plate 47 has a cross-sectional shape of one eighth of a circle and is clamped and installed at one end of the vertical rod 45 close to the axis of the hydration ring 41; the temperature control component 48 is embedded and installed on the inner wall of the inner support plate 47 close to the hydration ring 41; the temperature sensor 49 is embedded and installed on the inner wall of the inner support plate 47 away from the hydration ring 41;

[0096] The maximum extension amount of the electric telescopic rod 32 is smaller 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 internal pressure of 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 being separated 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] Through the axial elasticity of the return spring 46, the contact freedom between the inner support plate 47 and the ear seat 36 is released, the jointness and identity of the rigid contact are reduced, and the radial runout of the steel ring 37 or the collection tube 39 under the 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 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, the consistency of the temperature before and after the storage tube 38 is further ensured, reducing the influence 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 multi-directional collection at a fixed point, and working asynchronously can realize a single trip to the sea to collect seabed sediments in different sea areas.

[0101] The working principle of the multi-point sampling device for seabed sediment provided by the present invention is as follows: Step 1: First, the chassis 25 is controlled by the hydraulic rod 23 to drive the angle tube 26 to move to the target area under the guidance of the skeleton 1, and the angle tube 26 collects the target area, providing basic protection and combing effects to reduce the impact of external marine organisms or turbulence;

[0102] Step 2: Then, under the telescopic effect 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 to 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 through the connectivity between the mouth groove 322 and the storage tube 38, the relative consistency of the internal and external pressures of the storage tube 38 is achieved within a certain period of time. When the seawater pressure changes, the reciprocating motion of the spring plug 319 compensates for the temporary influence of the double-headed plug 326 on the internal volume of the storage tube 38 when it undergoes external pressure changes, 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 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 only 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 specification 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, characterized in that: The frame (1) is provided with a main body unit (2) outside, a collection unit (3) is provided at a middle position inside the frame (1), and a balancing unit (4) is provided outside the collection unit (3); The collection unit (3) comprises: A stage warehouse (31) is arranged in the middle of the frame (1); At least one electric telescopic rod (32) is circumferentially arranged in a space on one side of the stage warehouse (31), and the electric telescopic rod (32) is plugged and installed between the stage warehouse (31); A winch (33) is mounted on an end of the electric telescopic rod (32) away from the stage (31); A waterproof motor (34) is embedded and installed in the middle of the end surface of the winch (33) away from the stage (31); There is at least one suspension rod (35) which is circumferentially arranged on a side of the winch (33) away from the silo (31), and the suspension rod (35) is installed with the winch (33) by means of a snap fit; The ear seat (36) is plugged and installed on the end of the suspension rod (35) away from the stage warehouse (31); The steel ring (37) is coaxially arranged on a side of the stage warehouse (31) close to the suspension rod (35), and the steel ring (37) is installed by snap-fitting 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 installed in a close-fitting rotational manner; The collecting tube (39) is mounted in a snap-fit ​​manner at one end of the steel ring (37) away from the stage bin (31), and the collecting tube (39) is mounted in a rotationally fitting manner with the storage tube (38).

2. A multi-point sampling device for seabed sediments according to claim 1, characterized in that: The outer walls of the steel ring (37) and the storage tube (38) are evenly provided with water grooves (311); the end surface of the storage tube (38) on the side in contact with the collection tube (39) is provided with a through groove (312), and the number of through grooves (312) is at least one; the end surface of the storage tube (38) away from the storage bin (31) is through-connected with a column (313) that is rotatably mounted with the collection tube (39); in addition, the end of the column (313) close to the storage bin (31) is connected with the end of the waterproof motor (34) away from the storage bin (31); the end surface of the storage tube (38) close to the storage bin (31) is connected with the column A sealing ring (314) is sleeved on the outer wall of the storage tube (38), a connecting ring (315) is installed on one end of the outer ring of the end surface of the storage tube (38) close to the storage tank (31), a conduit (316) is installed on the end of the connecting ring (315) close to the storage tank (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 storage tank (31), and a spring plug (319) is installed on the inner wall of the conduit (316) close to the connecting ring (315) through sliding engagement.

3. A multi-point sampling device for seabed sediments according to claim 2, characterized in that: The other end of the outer ring of the end surface 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 slots (322). The inner wall of the end of the high-joint tube (321) away from the stage warehouse (31) is clamped with a gasket (323), and the gasket (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 (324) is slidably mounted on the inner wall of the high-joint tube (321). A ring piece (325) is clamped and installed on the outer wall of one end of the gasket (324) close to the gasket (323), 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 with the inner wall of the same height joint pipe (321). A telescopic spring (327) is sleeved and installed on the outer wall of the T-face column (324) and is located 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).

4. A multi-point sampling device for seabed sediments according to claim 3, characterized in that: The main unit (2) comprises: A suspended ceiling (21) is mounted on one end of the frame (1) by snap-fitting; The shaft seat (22) is embedded and clamped and installed at the middle position of the end surface of the ceiling (21) close to the frame (1); A hydraulic rod (23) is mounted in a clamping connection at a middle position of an end surface of the shaft seat (22) away from the ceiling (21); A counterweight block (24) is mounted on the hydraulic rod (23) at a middle position of the outer wall at one end away from the ceiling (21); A chassis (25) is mounted on the end of the hydraulic rod (23) away from the ceiling (21) by clamping; The corner tube (26) is mounted on the end of the chassis (25) away from the ceiling (21) by snap-fitting; in addition, the platform warehouse (31) is mounted on the inner wall of the end of the corner tube (26) close to the ceiling (21) by snap-fitting; The support (27) is evenly arranged on the outer wall of the corner tube (26) in the circumferential direction, and the support (27) is installed in a sliding and clamping manner with 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) and the frame (1) are detachably mounted via bolts.

5. A multi-point sampling device for seabed sediments according to claim 4, characterized in that: The balancing unit (4) comprises: There is at least one hydration ring (41), which corresponds to the position of the electric telescopic rod (32) one by one. In addition, the hydration ring (41) is mounted by snap-fitting with the end surface of the stage warehouse (31) away from the ceiling (21); The plates (42) are grouped in three and are circumferentially distributed on the end surface of the hydration ring (41) away from the stage warehouse (31); The outer protective bracket (43) is mounted on the middle position of the end surface of the plate (42) away from the hydration ring (41); A mouth frame (44) is mounted on a middle position of the outer wall of the outer protective support (43) at one end away from the axis of the hydration ring (41); The vertical rods (45) are at least two in a group and are installed in a sliding and snap-fitting manner at the middle position of the vertical section of the mouth frame (44); A return spring (46) is sleeved and installed 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 support (43); The inner support plate (47) has a cross-sectional shape of one eighth of a circular ring and is mounted on the vertical rod (45) at one end close to the axis of the hydration ring (41); A temperature control component (48) is embedded and installed on the inner wall of one end of the inner support plate (47) close to the hydration ring (41); The temperature sensor (49) is embedded and installed on the inner wall of one end of the inner support plate (47) away from the hydration ring (41).

6. A multi-point sampling device for seabed sediments according to claim 5, characterized in that: The corner tube (26) and the collecting tube (39) are both provided with continuous sawtooth grooves in the circumferential direction at the ends away from the suspended 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 end of the frame (1) away from the suspended ceiling (21) and the collar edge. The end of the suspended ceiling (21) away from the frame (1) is provided with a buckle for traction and hanging.

7. A multi-point sampling device for seabed sediments according to claim 6, 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.

8. A multi-point sampling device for seabed sediments according to claim 7, 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).

Images