Marine geological engineering sampling device and sampling method

Abstract

The invention relates to the technical field of surveying and mapping equipment, in particular to a marine geological engineering sampling device and a sampling method. Comprising a sampler and a plugging cover, a lifting hook is arranged at the top of the sampler, and the bottom of the sampler is open; the lifting hook is connected with a plugging cover rotating mechanism arranged at the upper part of the sampler, the plugging cover rotating mechanism is connected with a plugging cover through a connecting rod, the plugging cover is fixedly connected with the connecting rod, a sealing plug is arranged in the plugging cover, and the sealing plug is connected with a pushing mechanism; in the process that the plugging cover rotating mechanism drives the connecting rod to rotate, the plugging cover is driven to swing downwards until the plugging cover rotates to the bottom of the sampler, the pushing mechanism pushes the sealing plug upwards to the bottom of the sampler, and an opening in the bottom of the sampler is plugged. The sample is blocked in time after being collected, pollution caused by leakage of the sample is avoided, and operation is easy.

Description

Technical Field

[0001] The present invention relates to the technical field of exploration and surveying equipment, and specifically to an ocean geological engineering sampling device and a sampling method. Background Art

[0002] Ocean geological engineering exploration and surveying refers to the work of investigating, measuring, and analyzing the ocean geological environment, geological structure, seabed topography and geomorphology, geotechnical properties, etc. by using the theories and methods of multiple disciplines such as geology, geophysics, and geochemistry, as well as advanced technical means, so as to provide basic data and scientific basis for ocean engineering construction, ocean resource development, ocean environmental protection, etc.

[0003] Geophysical exploration uses geophysical methods such as gravity, magnetism, and seismic to detect the seabed stratum structure, geological structure, and potential geological disaster bodies, etc. For example, seismic exploration can understand the stratification and geological structure of the stratum by analyzing the propagation characteristics of seismic waves in the seabed stratum.

[0004] Ocean drilling drills holes on the seabed through a drilling ship or platform to obtain physical samples such as core samples, and conducts indoor experimental analysis to directly understand information such as the lithology, physical and mechanical properties, and geological age of the seabed stratum. During the process of ocean geological engineering exploration, it is necessary to complete the soil sampling work on the seabed in order to analyze and understand the ocean geology. Since the existing sampling device has no sealing structure at the bottom, when extracting the sample after the sampling device has collected the sample, the sample is prone to leakage and pollution. Summary of the Invention

[0005] In order to solve the technical problem that the existing sampling device has no sealing structure at the bottom, resulting in the sample being prone to leakage and pollution when extracting the sample after the sampling device has collected the sample, the present invention provides an ocean geological engineering sampling device and a sampling method.

[0006] The present invention is realized by adopting the following technical solutions: An ocean geological engineering sampling device includes a sampler and a sealing cover. Among them,

[0007] A hook is provided at the top of the sampler, and the bottom of the sampler is in an open shape;

[0008] The hook is connected to a sealing cover rotating mechanism arranged on the upper part of the sampler. The sealing cover rotating mechanism is connected to the sealing cover through a connecting rod. The sealing cover is fixedly connected to the connecting rod. A sealing plug is arranged inside the sealing cover, and the sealing plug is connected to a pushing mechanism;

[0009] During the process that the sealing cover rotating mechanism drives the connecting rod to rotate, it drives the sealing cover to swing downward until the sealing cover rotates to the bottom of the sampler, and the pushing mechanism pushes the sealing plug upward to the bottom of the sampler to seal the opening at the bottom of the sampler.

[0010] In the present invention, the plug cover rotating mechanism includes:

[0011] A first movable rod, which is fixed to the bottom of the lifting hook and can move up and down;

[0012] A first fixing pin, one end of which is fixedly connected to the push rod and can move horizontally. There is a groove in the first movable rod, and the other end of the first fixing pin can be inserted into the groove in the first movable rod. The first fixing pin is connected to a return spring, and the horizontal reciprocating movement of the first fixing pin is realized through the push rod and the return spring;

[0013] A rotating shaft. During the up and down movement of the first movable rod, power is transmitted to the rotating shaft through a power transmission mechanism to realize the rotation of the rotating shaft.

[0014] The upper end of the first movable rod is fixedly connected to the lifting hook, the lower end of the first movable rod is fixedly connected to a rack, a gear is fixed on the rotating shaft, the rack and the gear are meshed with each other, and a first limiting block is fixed at the bottom end of the rack;

[0015] A clamping block is fixed at the bottom of the groove of the first movable rod. Correspondingly, a clamping groove is provided at the bottom end of the first fixing pin facing the first movable rod. When the clamping block is arranged in the clamping groove, the insertion between the first movable rod and the first fixing pin is realized;

[0016] A movable block is fixed in the middle of the first fixing pin, and a return spring is provided on the side of the movable block facing the push rod.

[0017] The plug cover rotating mechanism further includes a second movable rod. The top of the second movable rod is fixedly connected to the bottom of the lifting hook, and a second limiting block is fixed at the bottom of the second movable rod;

[0018] There is a groove in the second movable rod. One end of a second fixing pin is movably inserted into the groove of the second movable rod, the other end of the second fixing pin is fixedly connected to the push rod, a movable block is fixed in the middle of the second fixing pin, and a return spring is provided on the side of the movable block facing the push rod.

[0019] A first movable groove is provided in the sampler along the vertical direction, a first limiting groove is provided below the first movable groove, the first movable rod is movably arranged in the first movable groove, and the rack and the first limiting block are movably arranged in the first limiting groove;

[0020] A gear groove is provided in the sampler, and the gear is rotatably arranged in the gear groove;

[0021] The movable block and the return spring are arranged in a connecting groove in the sampler. The movable block can move horizontally in the connecting groove. One end of the return spring is connected to the movable block, and the other end of the return spring is connected to the groove wall of the connecting groove.

[0022] The plugging cover is provided with a movable inner cavity, and the sealing plug is movably arranged in the movable inner cavity. The plugging cover is provided with a fixed block;

[0023] One end of the pushing mechanism contacts the sampler, and the other end of the pushing mechanism is connected to the sealing plug. By changing the oil pressure in the pushing mechanism, the sealing plug is driven to move upward to plug the bottom opening of the sampler.

[0024] The pushing mechanism includes:

[0025] An extrusion block, which is slidably arranged in the third movable groove. The third movable groove is provided at the side of the fixed block facing the sampler;

[0026] A first hydraulic cylinder, which is arranged in the fixed block, and its telescopic end is connected to the extrusion block;

[0027] A second hydraulic cylinder, which is arranged in the plugging cover, and its telescopic end is fixedly connected to the bottom of the sealing plug. The second hydraulic cylinder is connected to the first hydraulic cylinder through a connecting block.

[0028] This application also discloses a method for sampling by using the above-mentioned marine geological engineering sampling device, which includes the following steps:

[0029] S1. During the process of placing the sampler into the seabed, the plugging cover rotating mechanism does not act. At this time, the plugging cover is located outside the sampler, and the opening at the bottom of the sampler is in an open state;

[0030] After the sampler is placed into the seabed, the plugging cover rotating mechanism starts to act. At this time, the plugging cover can rotate. At the same time, the sampler completes the sampling work;

[0031] S3. After the sampling work is completed, the plugging cover rotating mechanism drives the plugging cover to rotate. The plugging cover rotates to the bottom of the sampler and below the opening at the bottom of the sampler;

[0032] The pushing mechanism drives the sealing plug to move upward until the sealing bag moves to the opening at the bottom of the sampler to plug the bottom of the sampler.

[0033] In step S1, push the push rod. The push rod drives the first fixed pin and the second fixed pin to move. Insert the first fixed pin into the groove inside the first movable rod, and insert the second fixed pin into the groove inside the second movable rod. At this time, the return springs connected to the first fixed pin and the second fixed pin are both in a stretched state;

[0034] Lift the hook upward. The hook drives the first movable rod and the second movable rod to move upward. The first movable rod drives the clamping block to be inserted into the inside of the card slot. The first fixed pin limits the first movable rod and the second movable rod to fix the positions of the first movable rod and the second movable rod to prevent the rack from moving up and down;

[0035] In step S2, after the sampler is placed on the seabed, the rope is relaxed. Under the action of gravity, the hook drives the first movable rod to move downward. The first movable rod drives the clamping block to move downward. When the clamping block disengages from the clamping groove, the return spring automatically resets and drives the first fixing pin to disengage from the groove of the first movable rod through the movable block, releasing the limit on the first movable rod. At the same time, the second fixing pin disengages from the groove of the second movable rod.

[0036] The bottom of the sampler is open to complete seabed sampling.

[0037] In step S3, after sampling is completed, the hook is lifted upward through the rope. The hook drives the first movable rod to move upward. The first movable rod drives the rack to move upward. Through the meshing transmission between the rack and the gear, the gear drives the rotating shaft to rotate. At the same time, the rotation of the rotating shaft drives the two connecting rods to rotate downward. The connecting rods drive the sealing cover to rotate downward around the rotating shaft to rotate the sealing cover to the bottom of the sampler.

[0038] When the sealing cover rotates to the bottom of the sampler, one end face of the extrusion block contacts the outer surface of the sampler. The outer surface of the sampler generates an extrusion force on the extrusion block, causing the extrusion block to move along the third movable groove towards the inside of the groove.

[0039] The movement of the extrusion block drives the piston rod of the first hydraulic cylinder to move. The piston rod pushes out the hydraulic oil inside the first hydraulic cylinder. The hydraulic oil flows through the connecting pipe to the inside of the second hydraulic cylinder. Under the action of the oil pressure, the piston rod of the second hydraulic cylinder extends and retracts outward, pushing the sealing plug upward until the sealing plug is pushed to the bottom opening of the sampler to seal the bottom of the sampler.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] (1) When the present invention is in use, after sampling is completed, the hook is lifted upward through the rope. The hook will drive the first movable rod and the rack to move upward. The rack will drive the gear to rotate. The gear will drive the rotating shaft to rotate. The rotating shaft will drive the two connecting rods to rotate. The connecting rods will drive the sealing cover to rotate downward around the rotating shaft to rotate the sealing cover to the bottom of the sampler. The sampler will extrude the extrusion block. The movement of the extrusion block will drive the piston rod of the first hydraulic cylinder to move. The piston rod will push the hydraulic oil inside the first hydraulic cylinder to move. The hydraulic oil will reach the inside of the second hydraulic cylinder through the connecting pipe. Finally, the hydraulic oil will push the piston rod inside the second hydraulic cylinder. The piston rod will drive the sealing plug upward to seal the bottom of the sampler. The operation is convenient and simple.

[0042] (2) When the present invention is in use, by pushing the push rod, the push rod will drive the fixed pin to be movably inserted into the groove inside the first movable rod, and then the lifting hook is lifted. The lifting hook will drive the first movable rod and the second movable rod to move upward. The first movable rod will drive the clamping block to be inserted into the clamping groove, so as to limit the fixed pin, and further limit the first movable rod and the second movable rod through the fixed pin, avoiding the movement of the rack and the gear, and ensuring the safety of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is the schematic diagram of the overall structure of the present invention;

[0044] Figure 2 is the schematic diagram of the side sectional structure of the sampler of the present invention;

[0045] Figure 3 is the schematic diagram of the structure of the lifting hook, the first movable rod and the second movable rod;

[0046] Figure 4 is the schematic diagram of the transverse sectional structure of the sampler of the present invention;

[0047] Figure 5 is the schematic diagram of the structure of the movable block and the return spring;

[0048] Figure 6 is the schematic diagram of the connection structure of the first movable rod and the first fixed pin of the present invention;

[0049] Figure 7 is the schematic diagram of the structure of the sampler when it is closed according to the present invention;

[0050] Figure 8 is the schematic diagram of the structure of the sealing plug and the sampler;

[0051] Figure 9 is the schematic diagram of the structure of the plugging cover.

[0052] In the figure: 1. Sampler; 2. Plugging cover; 3. Lifting hook; 4. First movable rod; 5. Rack; 6. Gear; 7. Rotating shaft; 8. Connecting rod; 9. First limiting block; 10. First movable groove; 11. First limiting groove; 12. Second movable rod; 13. Second limiting block; 14. Second movable groove; 15. Second limiting groove; 16. Push rod; 17. First fixed pin; 18. Movable block; 19. Return spring; 20. Guide groove; 21. Connecting groove; 22. Clamping groove; 23. Clamping block; 24. Fixed block; 25. Extrusion block; 26. First hydraulic cylinder; 27. Connecting pipe; 28. Second hydraulic cylinder; 29. Sealing plug; 30. Third movable groove; 31. Movable inner cavity; 32. Second fixed pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] Next, in combination with the accompanying drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of non-conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0054] As Figure 1 shown, a marine geological engineering sampling device according to the present invention includes a sampler 1 and a sealing cover 2. A hook 3 is provided at the top of the sampler 1, and the bottom of the sampler 1 is open. An inner upper part of the sampler 1 is provided with a sealing cover rotation mechanism, and the sealing cover rotation mechanism is connected to the sealing cover 2 through a connecting rod 8. During the operation of the sealing cover rotation mechanism, the sealing cover 2 is driven to rotate through the connecting rod 8, so that the sealing cover 2 can rotate to the bottom opening of the sampler 1 to realize the sealing of the sampler. The bottom of the hook 3 is fixedly connected to the sealing cover rotation mechanism, and the sealing cover rotation mechanism is movably arranged in the sampler 1. As Figures 2 to 6 shown, the sealing cover rotation mechanism includes a first movable rod 4, a rack 5, a gear 6 and a rotating shaft 7. The bottom of the hook 3 is fixed with a first movable rod 4, and the bottom of the first movable rod 4 is fixedly connected to the rack 5. A gear 6 is provided outside the rack 5, and the rack 5 and the gear 6 are meshed with each other. The center of the gear 6 is fixed with a rotating shaft 7, and the rotating shaft 7 is rotatably connected to the sampler 1. Both ends of the rotating shaft 7 are located outside the sampler 1, and both ends of the rotating shaft 7 located outside the sampler are respectively connected to the sealing cover 2 through a connecting rod 8.

[0055] Correspondingly, an inner upper end of the sampler 1 is provided with a first movable groove 10 arranged in the vertical direction, and the first movable rod 4 is movably arranged in the first movable groove 10. The first movable rod 4 can move up and down in the first movable groove 10, and the first movable groove 10 plays a guiding role in the up and down movement of the first movable rod 4. A first limiting groove 11 arranged in the vertical direction is provided at the bottom of the first movable groove 10. The first limiting groove 11 is communicated with the first movable groove 10. The bottom of the rack 5 is fixed with a first limiting block 9, and the rack 5 and the first limiting block 9 are movably arranged in the first movable groove 10, that is, the rack 5 and the first limiting block 9 can move up and down in the first movable groove 10. When the rack 5 moves, the first limiting block 9 is driven to move up and down along the first limiting groove 11 at the same time. When the sealing cover 2 is located at the bottom of the sampler 1, the first limiting block 9 will reach the top of the first limiting groove 11.

[0056] One end of the bottom of the lifting hook 3 is fixedly connected with a second movable rod 12, and the bottom of the second movable rod 12 is fixedly connected with a second limiting block 13. Correspondingly, a second movable groove 14 arranged in the vertical direction is provided inside the sampler 1, the second movable rod 12 can be movably arranged inside the second movable groove 14, a second limiting groove 15 arranged in the vertical direction is provided below the second movable groove 14, the second limiting block 13 can be movably arranged inside the second limiting groove 15, and the second movable groove 14 and the second limiting groove 15 communicate with each other. The first limiting groove 11 and the second limiting groove 15 have the same height, which is convenient for keeping the sampler 1 in a balanced state by the first limiting block 9 and the second limiting block 13 when lifting the lifting hook 3.

[0057] A gear groove is also provided inside the sampler 1, the gear 6 can be rotatably arranged inside the gear groove, and the gear groove communicates with the first movable groove 10 and the first limiting groove 11.

[0058] A groove is provided inside the first movable rod 4, a first fixing pin 17 is inserted into the groove, and one end of the first fixing pin 17 can move inside the groove. In this embodiment, a clamping block 23 is fixed at the bottom wall of the groove, and correspondingly, a clamping groove is provided at the bottom of one end of the first fixing pin 17. When the clamping block 23 is arranged in the clamping groove 22, the connection between the first movable rod 4 and the first fixing pin 17 can be realized. The other end of the first fixing pin 17 is fixedly connected with the push rod 16. An activity block 18 is fixedly connected to the middle of the first fixing pin 17, and a return spring 19 is provided on the side of the activity block 18 facing away from the first movable rod 4.

[0059] Similarly, a groove is provided inside the second movable rod 12, a second fixing pin 32 is inserted into the groove, and one end of the second fixing pin 32 can move inside the groove. In this embodiment, a clamping block 23 can also be fixed at the bottom wall of the groove, and correspondingly, a clamping groove is provided at the bottom of one end of the second fixing pin 32. When the clamping block 23 is arranged in the clamping groove 22, the connection between the second movable rod 12 and the second fixing pin 32 can be realized. The other end of the second fixing pin 32 is fixedly connected with the push rod 16, that is, the first fixing pin 17 and the second fixing pin 32 are fixedly connected through the push rod 16. An activity block 18 is fixedly connected to the middle of the second fixing pin 32, and a return spring 19 is provided on the side of the activity block 18 facing away from the first movable rod 4.

[0060] Such as Figure 4As shown in the figure, on one side of the first movable slot 10 and the second movable slot 14 facing the push rod, there are respectively guide slots 20 extending in the vertical direction. The guide slots 20 are respectively communicated with the first movable slot 10 and the second movable slot 14. The first fixing pin 17 is movably arranged in the guide slot 20 communicated with the first movable slot 10, and the second fixing pin 32 is movably arranged in the guide slot 20 communicated with the second movable slot 14. On one side of the two guide slots 20 facing the movable block, there are respectively connection slots 21 extending in the vertical direction. The connection slots 21 are communicated with the guide slots 20. The movable blocks 18 respectively connected to the first fixing pin 17 and the second fixing pin 32 are movably arranged in the connection slots 21. One end of the return spring 19 is fixedly connected to the movable block 18, and the other end of the return spring 19 is fixedly connected to the inner side wall of the connection slot 21.

[0061] When the push rod 16 is pressed, the first fixing pin 17 moves along the guide slot 20 towards the groove in the first movable rod 4, and the second fixing pin 32 moves along the guide slot 20 towards the groove in the second movable rod 12. At this time, the movable blocks 18 fixedly connected to the first fixing pin 17 and the second fixing pin 32 move away from the push rod, and at this time, the return spring 19 between the movable block 18 and the side wall of the connection slot 21 is in a stretched state. When the push rod 16 is released and the clamping block 23 disengages from the clamping slot 22, while the return spring 19 automatically resets, it drives the movable block 18, as well as the first fixing pin 17 and the second fixing pin 32, to move towards the push rod, so that the first fixing pin 17 disengages from the first movable rod 4, and the second fixing pin 32 disengages from the second movable rod 12.

[0062] When it is necessary to sample marine geology, push the push rod 16. The push rod 16 will drive the first fixing pin 17 and the second fixing pin 32 to move, so that the first fixing pin 17 is inserted into the groove inside the first movable rod 4, and the second fixing pin 32 is inserted into the groove inside the second movable rod 4. Then lift the hook 3 by the rope. The hook 3 will drive the first movable rod 4 and the second movable rod 12 to move upward. The first movable rod 4 will drive the clamping block 23 to be inserted into the inside of the clamping slot 22, so as to limit the first fixing pin 17. At the same time, the first fixing pin 17 limits the first movable rod 4 and the second movable rod 12 to prevent the rack 5 from moving up and down. Next, the sampler 1 can be placed into the seabed through the rope for sampling.

[0063] When the sampler 1 reaches the seabed, relax the rope. Under the action of gravity, the hook 3 drives the first movable rod 4 to move downward. The first movable rod 4 drives the clamping block 23 to move downward. When the clamping block 23 disengages from the clamping slot 22, the return spring 19 automatically resets and retracts, and drives the movable block 18 to automatically reset. The movable block 18 drives the first fixing pin 17 to disengage from the groove of the first movable rod 4, thereby releasing the limit on the first movable rod 4.

[0064] After sampling is completed, the lifting hook 3 is lifted upward through the rope. The lifting hook 3 drives the first movable rod 4 to move upward, and the first movable rod 4 drives the rack 5 to move upward. Through the meshing transmission between the rack 5 and the gear 6, the gear 6 drives the rotating shaft 7 to rotate. While the rotating shaft 7 rotates, it drives two connecting rods 8 to rotate downward, and the connecting rods 8 drive the sealing cover 2 to rotate downward around the rotating shaft 7, rotating the sealing cover 2 to the bottom of the sampler 1, thus facilitating the sealing of the bottom of the sampler 1.

[0065] As Figures 7 to 9 shown, the shape of the sealing cover 2 corresponds to that of the sampler 1. One end of the sealing cover 2 facing the sampler 1 is open, and the other end face of the corresponding sealing cover 2 is closed. An active inner cavity 31 is provided at one end of the sealing cover 2 facing the sampler 1. A sealing plug 29 is provided in the active inner cavity 31. The sealing plug 29 can move up and down. When the sealing plug 29 moves to the bottom of the sampler 1, it plays a role in blocking the bottom opening of the sampler 1.

[0066] The sealing plug 29 is movably connected to the inside of the active inner cavity 31. The sealing plug 29 moves upward along the active inner cavity 31. Therefore, the active inner cavity 31 plays a guiding role in the movement of the sealing plug 29.

[0067] A fixing block 24 is provided at the annular outer side of the sealing cover 2. One end of the fixing block 24 is fixedly connected to the annular outer side of the sealing cover 2. The other end of the fixing block 24 and the side facing the sampler are provided with a third active groove 30. An extrusion block 25 is movably provided in the third active groove, that is, the extrusion block 25 can reciprocate in the third active groove 30. In the initial state, one side end face of the extrusion block 25 is located outside the third active groove 30.

[0068] When the sealing cover 2 rotates to the bottom of the sampler 1, one side end face of the extrusion block 25 contacts the outer surface of the sampler 1. The outer surface of the sampler 1 generates an extrusion force on the extrusion block 25, causing the extrusion block 25 to move along the third active groove 30 towards the inner direction of the groove.

[0069] A first hydraulic cylinder 26 is provided in the fixing block 24. The telescopic end of the first hydraulic cylinder 26 is fixedly connected to the extrusion block 25. The other end of the first hydraulic cylinder 26 is connected to a second hydraulic cylinder 28 through a connecting pipe 27. The second hydraulic cylinder 28 is provided in the sealing cover 2. The telescopic end of the second hydraulic cylinder 28 is fixedly connected to the bottom of the sealing plug 29.

[0070] The extrusion block 25 moves actively to drive the piston rod of the first hydraulic cylinder 26 to move. The piston rod pushes out the hydraulic oil inside the first hydraulic cylinder 26. The hydraulic oil flows through the connecting pipe 27 into the inside of the second hydraulic cylinder 28. Under the action of the hydraulic pressure, the piston rod of the second hydraulic cylinder 28 extends outwards and pushes the sealing plug 29 to move upwards until the sealing plug 29 is pushed to the bottom opening of the sampler 1 to block the bottom of the sampler 1.

[0071] After sampling is completed, the lifting hook 3 is lifted upwards by the rope. The lifting hook 3 drives the first movable rod 4 and the rack 5 to move upwards. The rack 5 drives the gear 6 to rotate through meshing transmission. The gear 6 drives the rotating shaft 7 to rotate. The rotating shaft 7 drives the connecting rods 8 at both ends thereof and the sealing cover 2 fixedly connected to the connecting rod 8 to rotate downwards, so that the sealing cover 2 rotates to the bottom opening of the sampler 1. During the downward movement of the sampler 1, the outer wall surface of the sampler will generate an extrusion force on the extrusion block 25 in the third movable groove 30. During the movement of the extrusion block 25 along the third movable groove 30, it drives the piston rod of the first hydraulic cylinder 26 connected thereto to move. The piston rod extrudes the hydraulic oil in the first hydraulic cylinder 26 through the connecting pipe 27 into the inside of the second hydraulic cylinder 28, and pushes the piston rod of the second hydraulic cylinder 28 to move upwards, and at the same time drives the sealing plug 29 to move upwards to block the bottom opening of the sampler 1.

[0072] This application also discloses a method for realizing seabed sampling by using the above-mentioned marine geological engineering sampling device. The method includes the following steps.

[0073] In the first step, the push rod 16 is pushed. The push rod 16 drives the first fixing pin 17 and the second fixing pin 32 to move. The first fixing pin 17 is inserted into the groove inside the first movable rod 4, and the second fixing pin 32 is inserted into the groove inside the second movable rod 4. At this time, the return springs 19 connected to the first fixing pin 17 and the second fixing pin 32 are both in a stretched state.

[0074] The lifting hook 3 is lifted upwards. The lifting hook 3 drives the first movable rod 4 and the second movable rod 12 to move upwards. The first movable rod 4 drives the clamping block 23 to be inserted into the inside of the clamping groove 22, so as to limit the first fixing pin 17. At the same time, the first fixing pin 17 limits the first movable rod 4 and the second movable rod 12, so that the positions of the first movable rod 4 and the second movable rod 12 are fixed, and the up and down movement of the rack 5 is avoided.

[0075] In the second step, after the sampler 1 is placed on the seabed, the rope is relaxed. Under the action of gravity, the hook 3 drives the first movable rod 4 to move downward, and the first movable rod 4 drives the clamping block 23 to move downward. When the clamping block 23 disengages from the clamping groove 22, the return spring 19 automatically resets and drives the first fixing pin 17 to disengage from the groove of the first movable rod 4 through the movable block 18, thereby releasing the limit on the first movable rod 4. At the same time, the second fixing pin 32 disengages from the groove of the second movable rod 12.

[0076] The bottom of the sampler 1 is open, and the seabed substances enter the sampler 1 through the opening at the bottom of the sampler, achieving seabed sampling.

[0077] In the third step, after the sampling is completed, the hook 3 is lifted upward through the rope. The hook 3 drives the first movable rod 4 to move upward, and the first movable rod 4 drives the rack 5 to move upward. Through the meshing transmission between the rack 5 and the gear 6, the gear 6 drives the rotating shaft 7 to rotate. While the rotating shaft 7 rotates, it drives the two connecting rods 8 to rotate downward, and the connecting rods 8 drive the sealing cover 2 to rotate downward around the rotating shaft 7 to rotate the sealing cover 2 to the bottom of the sampler 1, thereby facilitating the sealing of the bottom of the sampler 1.

[0078] When the sealing cover 2 rotates to the bottom of the sampler 1, one end face of the extrusion block 25 contacts the outer surface of the sampler 1, and the outer surface of the sampler 1 generates an extrusion force on the extrusion block 25, causing the extrusion block 25 to move along the third movable groove 30 toward the inside of the groove.

[0079] The movement of the extrusion block 25 drives the piston rod of the first hydraulic cylinder 26 to move. The piston rod pushes out the hydraulic oil inside the first hydraulic cylinder 26, and the hydraulic oil flows through the connecting pipe 27 into the inside of the second hydraulic cylinder 28. Under the action of the hydraulic pressure, the piston rod of the second hydraulic cylinder 28 extends and retracts outward, pushing the sealing plug 29 to move upward until the sealing plug 29 is pushed to the bottom opening of the sampler 1 to seal the bottom of the sampler 1.

[0080] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A marine geological engineering sampling device, comprising a sampler and a plugging cover, characterized in that: The top of the sampler is provided with a hook, and the bottom of the sampler is open; The hook is connected to a plugging cover rotating mechanism arranged on the upper part of the sampler, the plugging cover rotating mechanism is connected to the plugging cover through a connecting rod, the plugging cover is fixedly connected to the connecting rod, a sealing plug is arranged in the plugging cover, and the sealing plug is connected to the pushing mechanism; When the sealing cover rotating mechanism drives the connecting rod to rotate, the sealing cover is driven to swing downward until the sealing cover rotates to the bottom of the sampler, and the pushing mechanism pushes the sealing plug upward to the bottom of the sampler to seal the opening at the bottom of the sampler.

2. A marine geological engineering sampling device according to claim 1, characterized in that: The blocking cover rotating mechanism comprises: A first movable rod, which is fixed to the bottom of the hook and can move up and down; A first fixed pin, one end of which is fixedly connected to the push rod and can move horizontally. A groove is provided in the first movable rod. The other end of the first fixed pin can be plugged into the groove in the first movable rod. The first fixed pin is connected to a return spring. The push rod and the return spring are used to realize the horizontal reciprocating motion of the first fixed pin. The rotating shaft, when the first movable rod moves up and down, the power is transmitted to the rotating shaft through the power transmission mechanism to realize the rotation of the rotating shaft.

3. A marine geological engineering sampling device according to claim 2, characterized in that: The upper end of the first movable rod is fixedly connected to the hook, the lower end of the first movable rod is fixedly connected to the rack, a gear is fixed on the rotating shaft, the rack and the gear are meshed with each other, and a first limit block is fixed to the bottom end of the rack; A clamping block is fixed at the bottom of the groove of the first movable rod, and a clamping slot is correspondingly provided at the bottom of one end of the first fixing pin facing the first movable rod. When the clamping block is arranged in the clamping slot, the first movable rod and the first fixing pin are plugged in. A movable block is fixed at the middle of the first fixing pin, and a return spring is arranged on one side of the movable block facing the push rod.

4. A marine geological engineering sampling device according to claim 2, characterized in that: The blocking cover rotation mechanism also includes a second movable rod, the top of the second movable rod is fixedly connected to the bottom of the hook, and the bottom of the second movable rod is fixed with a second limit block; A groove is provided in the second movable rod, one end of the second fixed pin can be movably inserted into the groove of the second movable rod, the other end of the second fixed pin is fixedly connected to the push rod, a movable block is fixed in the middle of the second fixed pin, and a return spring is provided on the side of the movable block facing the push rod.

5. A marine geological engineering sampling device according to claim 3 or 4, characterized in that: The sampler is provided with a first movable groove arranged in the vertical direction, a first limiting groove is provided below the first movable groove, a first movable rod is movably arranged in the first movable groove, and a rack and a first limiting block are movably arranged in the first limiting groove; The sampler is provided with a gear groove, and the gear is rotatably arranged in the gear groove; The movable block and the reset spring are arranged in the connecting groove in the sampler. The movable block can move horizontally in the connecting groove. One end of the reset spring is connected to the movable block, and the other end of the reset spring is connected to the groove wall of the connecting groove.

6. A marine geological engineering sampling device according to claim 1, characterized in that: The blocking cover is provided with a movable inner cavity, the sealing plug is movably arranged in the movable inner cavity, and the blocking cover is provided with a fixing block; One end of the pushing mechanism contacts the sampler, and the other end of the pushing mechanism is connected to the sealing plug. The sealing plug is driven to move upward through the change of oil pressure in the pushing mechanism to seal the bottom opening of the sampler.

7. A marine geological engineering sampling device according to claim 6, characterized in that: The driving mechanism comprises: The extrusion block is slidably disposed in the third movable groove, and the third movable groove is disposed on the side of the fixed block facing the sampler; A first hydraulic cylinder is disposed in the fixed block, and a retractable end thereof is connected to the extrusion block; The second hydraulic oil cylinder is arranged in the sealing cover, and its retractable end is fixedly connected to the bottom of the sealing plug. The second hydraulic oil cylinder is connected to the first hydraulic oil cylinder through a connecting block.

8. A method for sampling using a marine geological engineering sampling device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. When placing the sampler into the seabed, the plugging cover rotation mechanism does not move. At this time, the plugging cover is located outside the sampler, and the opening at the bottom of the sampler is open; S2. After the sampler is placed on the seabed, the plugging cover rotation mechanism starts to work, and the plugging cover can rotate at this time, and at the same time the sampler completes the sampling work; S3. After the sampling work is completed, the rotating mechanism is blocked to drive the blocking cover to rotate, and the blocking cover rotates to the bottom of the sampler and below the bottom opening of the sampler; The pushing mechanism drives the sealing plug to move upward until the sealing bag moves to the opening at the bottom of the sampler to seal the bottom of the sampler.

9. The sampling method according to claim 8, characterized in that: In step S1, the push rod is pushed, and the push rod drives the first fixed pin and the second fixed pin to move, and the first fixed pin is inserted into the groove of the first movable rod, and the second fixed pin is inserted into the groove of the second movable rod. At this time, the return springs connected to the first fixed pin and the second fixed pin are both in a stretched state; Lift the hook upward, the hook drives the first movable rod and the second movable rod to move upward, the first movable rod drives the card block to be inserted into the card slot, the first fixing pin limits the first movable rod and the second movable rod, so that the positions of the first movable rod and the second movable rod are fixed, and the rack is prevented from moving up and down; In step S2, after the sampler is placed on the seabed, the rope is loosened, and the hook drives the first movable rod to move downward under the action of gravity, and the first movable rod drives the clamping block to move downward. When the clamping block is separated from the clamping slot, the reset spring automatically resets and drives the first fixed pin to separate from the groove of the first movable rod through the movable block, thereby releasing the limit on the first movable rod, and at the same time, the second fixed pin separates from the groove of the second movable rod; The bottom of the sampler is open, which completes the seabed sampling.

10. The sampling method according to claim 8, characterized in that: In step S3, when sampling is completed, the hook is lifted upward by the rope, the hook drives the first movable rod to move upward, the first movable rod drives the rack to move upward, through the meshing transmission between the rack and the gear, the gear drives the shaft to rotate, and at the same time, the rotation of the shaft drives the two connecting rods to rotate downward, and the connecting rod drives the blocking cover to rotate downward around the shaft, and the blocking cover is rotated to the bottom of the sampler; When the blocking cover rotates to the bottom of the sampler, one end surface of the extrusion block contacts the outer surface of the sampler, and the outer surface of the sampler generates an extrusion force on the extrusion block, so that the extrusion block moves along the third movable groove toward the inner direction of the groove; The movement of the extrusion block drives the movement of the piston rod of the first hydraulic cylinder, and the piston rod pushes the oil inside the first hydraulic cylinder out, and the oil flows to the inside of the second hydraulic cylinder through the connecting pipe. Under the action of the oil pressure, the piston rod of the second hydraulic cylinder retracts and contracts outwards, pushing the sealing plug upward until the sealing plug is pushed to the bottom opening of the sampler, thereby sealing the bottom of the sampler.

Images