CN118067444A

CN118067444A - Quantitative collection device and method for marine sediments

Info

Publication number: CN118067444A
Application number: CN202311194845.4A
Authority: CN
Inventors: 范颖; 邴雪; 马自强
Original assignee: Qingdao Spata Analysis Testing Co ltd
Current assignee: Qingdao Spata Analysis Testing Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-24

Abstract

The invention discloses a quantitative marine sediment collecting device and method, comprising a first bracket, wherein a mounting plate is fixedly arranged on the first bracket, a vertical plate is fixedly arranged on the mounting plate, a closed box for conveniently collecting marine sediment in a closed space is fixedly arranged on the vertical plate, a vent pipe for venting the closed box is fixedly arranged on the closed box, a drain pipe for draining water in the closed box out of the closed box is fixedly arranged on the left side of the closed box and positioned on the vent pipe, and a driving assembly is arranged on the mounting plate and provided with a quantitative barrel for quantitatively collecting marine sediment. In the using process, through the arrangement of the expelling assembly, the rotating plate can be driven to be unfolded outwards by pushing the quantitative cylinder during descending, impurities on the surface of the sediment can be pulled out by the unfolded rotating plate, the quantitative cylinder can be conveniently introduced into the sediment, and therefore the sediment can be taken out by the quantitative cylinder.

Description

Quantitative collection device and method for marine sediments

Technical Field

The invention relates to the technical field of marine sediment sample collection, in particular to a device and a method for quantitatively collecting marine sediment.

Background

In different sea areas, the dynamic conditions of material transportation are different, land materials enter the sea mainly for transportation of rivers, then for transportation of geological effects such as floating ice and wind power, land debris transported into the sea by the rivers rarely reaches deep sea and is mainly deposited in coastal estuary areas and inland frames, only a small amount of fine materials are brought to external land frames and further away, and in high-latitude sea areas, a large amount of coarse debris deposition is formed due to glacier effect and floating ice transportation, wherein ocean sediment refers to the sum of submarine sediments formed by various ocean sediments. The deposition of substances on the sea floor using sea water as a medium can be generally divided into 3 different processes, physical, chemical and biological, and the deposition can be regarded as a geological body generated by the combined action because the processes are often not performed in isolation. Traditionally, the deposit is divided by depth into: offshore deposition (0-20 m), shallow sea deposition (20-200 m), semi-deep sea deposition (200-2000 m), deep sea deposition (greater than 2000 m).

In the prior art, publication number is CN 207570850U' discloses a marine sampling device, through be equipped with a plurality of liquid collecting bottle on a support frame, all be equipped with the solenoid valve in every liquid collecting bottle bottom, and set up the supporter, the buoy, the guide bar, the sealing plug, every control button and every solenoid valve one-to-one on the control handle, when the sea water of different degree of depth is sampled in same sea area like this, can realize the sampling work to the sea water of different degree of depth through controlling opening and closing of different solenoid valves, improve the efficiency of sampling, among the current sampling device, because sampling device own structure function is more single, consequently, only can accomplish the sampling work of one sample at every turn, so when need to sample to same sea area, the sea water of different degree of depth just needs many times repetitive operation, thereby cause the problem that sampling work efficiency is low

However, the prior art still has great disadvantages, such as:

Most of the current sampling devices adopt sealed boxes to seal the positions of sampled marine sediments, then seawater in the boxes is discharged to collect the marine sediments, but excessive impurities fall on the marine offshore sediments due to the fluctuation of the seawater, the impurities are directly collected in the sampling devices when the sampling devices directly extract the marine sediments, and the impurities are required to be cleaned after being taken out, so that the efficiency of sampling the marine sediments is seriously affected by excessive time wasted during cleaning.

Disclosure of Invention

The invention aims to provide a quantitative marine sediment collection device and a quantitative marine sediment collection method, which are used for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The device comprises a first bracket, wherein a mounting plate is fixedly arranged on the first bracket, a vertical plate is fixedly arranged on the mounting plate, a closed box which is used for conveniently collecting marine sediments in a closed space is fixedly arranged on the vertical plate, a vent pipe which is used for ventilating the closed box is fixedly arranged on the closed box, and a drain pipe which is used for draining water in the closed box out of the closed box is fixedly arranged on the left side of the closed box;

The device comprises a mounting plate, wherein a driving assembly is arranged on the mounting plate, a quantitative barrel for quantitatively collecting marine sediments is arranged on the driving assembly, and a grid ring for discharging seawater in the marine sediments is arranged on the side surface of the quantitative barrel;

And a expelling assembly for expelling impurities on the surface of the marine sediment is arranged on the driving assembly and outside the quantitative cylinder.

Preferably, the drive assembly includes the first electric putter of installing on the mounting panel, the output fixed mounting of first electric putter has the second support, the output fixed mounting of second support has the lifter plate, fixed mounting has the motor on the lifter plate, the output fixed mounting of motor has the rotary drum, the inside fixed mounting of rotary drum has the fourth electric putter, the threaded rod is installed through screw thread logical groove screw thread to the inside of rotary drum, the commentaries on classics piece that is used for connecting the output shaft of fourth electric putter is installed in the rotation on the threaded rod, the bottom fixed mounting of threaded rod has the connecting rod, the one end fixed mounting that the threaded rod was kept away from to the connecting rod has the connecting plate, the connecting plate passes through fastening bolt and quantitative section of thick bamboo fixed connection, through the fourth electric putter promotes the threaded rod and can utilize the screw thread logical groove screw thread rotation in threaded rod and the rotary drum, can drive the quantitative section of thick bamboo takes place the rotation when descending.

Preferably, the expelling assembly comprises a second electric push rod arranged on the lifting plate, a lifting rod is fixedly arranged at the output end of the second electric push rod, a pressing plate is fixedly arranged on the lower end face of the lifting rod, a square through groove is formed in the pressing plate, a rotating groove is formed in the inner side face of the square through groove, a rotating shaft is rotatably arranged in the rotating groove, a rotating plate is fixedly arranged at one end, far away from the rotating groove, of the rotating shaft, a torsion spring is fixedly arranged on the rotating plate, one end, far away from the rotating plate, of the torsion spring is fixedly arranged in the rotating groove, and the rotating plate in a horizontal state can be unfolded to two sides through the rotating shaft by virtue of thrust generated during descending of the quantitative cylinder.

Preferably, the inside of revolving plate is provided with the ventilation chamber, the inside in ventilation chamber is provided with the exhaust hole with external intercommunication, the inside connecting pipe that is provided with external intercommunication in ventilation chamber, the connecting pipe has U type pipe through flexible hose fixed mounting, the one end that flexible hose was kept away from to U type pipe is linked together with the breather pipe, the inside of U type pipe is provided with the valve, through will the valve is opened, can let in gas in the U type intraductal, rethread flexible hose and connecting pipe are with gas let in ventilation intracavity.

Preferably, a storage groove is formed in the lower end face of the inner side wall of the closed box, a third electric push rod is fixedly mounted at the inner top of the storage groove, and a sealing plate for enhancing the sealing effect of the closed box is fixedly mounted at the output end of the third electric push rod.

Preferably, the lateral surface fixed mounting of enclosure has the receiver, the inside of receiver is provided with the air cushion, fixed mounting has the first siphunculus that is in the inside of enclosure on the breather pipe, the one end fixed mounting that the breather pipe was kept away from to first siphunculus has the second siphunculus, the one end that the first siphunculus was kept away from to the second siphunculus is connected with the air cushion, the inside of first siphunculus is provided with the valve, the inside of receiver is provided with the logical groove with external intercommunication, opens through the valve, can let in first siphunculus with the utilization breather pipe in, rethread the second siphunculus can let in it in the air cushion.

Preferably, the lower end face of the vertical plate is fixedly provided with an L-shaped positioning rod, and the positioning rod is provided with a first through hole for the lifting rod to pass through.

Preferably, the upper end face of the closed box is used for the inner side wall of the through hole II through which the rotary drum and the lifting rod pass is provided with a sealing ring.

Preferably, an auxiliary frame is fixedly arranged on the side end face of the lifting plate, a pulley is rotatably arranged on the auxiliary frame, and a sliding groove which is same with the limiting sliding of the pulley is formed in the inner side wall of the vertical plate.

The quantitative marine sediment collection method comprises the following steps of:

s1: firstly, placing a closed box at a position to be taken of marine sediments through a first bracket, sealing the position to be taken of the marine sediments by using the closed box, then filling gas into the closed box through an external air pump, opening a valve in a drain pipe, and discharging water in the closed box out of the closed box through the drain pipe on the closed box;

S2: then the valve in the drain pipe is closed, the sealing plate is driven by the third electric push rod to extend into the sludge near the ocean, the sealing box can be sealed for the first time, meanwhile, the valve in the first through pipe is opened, gas is discharged into the first through pipe through the vent pipe, then the gas is filled into the air cushion through the second through pipe, then the air cushion in the storage shell can extend outwards through the through groove, the sealing box and the ocean bottom can be sealed for the second time by utilizing the air cushion, and the sealing effect of the sealing box and the ocean bottom can be improved;

S3: the first electric push rod drives the second support to move downwards so as to drive the lifting plate to move, the lifting plate can slide in the chute in a limiting manner through the pulley, the motor drives the rotary drum to rotate, meanwhile, the fourth electric push rod drives the threaded rod to move downwards, the threaded rod rotates in the rotary drum through the rotating block and the threaded rod, the quantitative cylinder can synchronously follow the threaded rod to descend and rotate through the connecting rod, the rotating plate in a horizontal state can be directly rotated outwards through the rotating shaft under the action of the downward pressure and the rotating force of the quantitative cylinder, impurities on the surface of the sediment can be pulled out through the rotating plate, the valve in the first through pipe is opened during rotation, the gas is introduced into the U-shaped pipe through the vent pipe, the gas can be introduced into the vent cavity in the connecting pipe through the telescopic hose, the gas in the vent cavity can be directly discharged through the vent hole, and the discharged gas can directly blow the impurities pulled out by the rotating plate;

s4: the quantitative cylinder can be directly drilled into sediment by pushing the threaded rod, the sediment can directly enter the quantitative cylinder through a feed inlet on the quantitative cylinder, finally the sediment can be collected by the quantitative cylinder, and then the sediment can be quantitatively taken out by lifting the threaded rod.

Compared with the prior art, the invention has the beneficial effects that:

1. through the arrangement of the expelling assembly, the rotating plate can be driven to be unfolded outwards by pushing the quantitative cylinder during descending, impurities on the surface of the sediment can be unfolded by using the unfolded rotating plate, the quantitative cylinder can be conveniently introduced into the sediment, and therefore the sediment can be taken out by the quantitative cylinder;

2. through the arrangement of the driving assembly, the fourth electric push rod can drive the threaded rod to move downwards, then the threaded rod and the rotary drum are rotated through threads, the quantitative cylinder can be driven to move downwards and rotate simultaneously, larger impurities can be pulled out, the quantitative cylinder can be more conveniently introduced into sediment, and the convenience of taking out the sediment by the quantitative cylinder is further improved;

3. Through the arrangement of the exhaust holes, the first through pipe and the second through pipe can be used for introducing the gas in the exhaust pipe into the ventilation cavity, then the gas can be exhausted through the exhaust holes, and the exhausted gas can directly blow out the impurity pulled out by the rotating plate, so that the effect of pulling out the impurity by the rotating plate can be further improved;

4. through the arrangement of the sealing plate, the sealing plate can be driven to extend out of the sealing plate in the storage groove in the closed box by the third electric push rod, and the extending sealing plate can be directly inserted into the bottom of the ocean, so that the sealing effect of the closed box can be improved on the basis of the closed box;

5. Through the setting of air cushion, utilize first siphunculus and second siphunculus can be with the gas in the breather pipe lets in the air cushion in, the air cushion of inflation passes through the logical groove protrusion of receiver, and convex air cushion can hug closely in the junction of seal box and ocean bottom, can further improve the sealed effect of seal box on the basis of closing plate.

Drawings

FIG. 1 is a schematic perspective view of the whole structure of the present invention;

FIG. 2 is a schematic view of the structure of the enclosure of the present invention;

FIG. 3 is a schematic view showing the structure of the quantifying cylinder according to the present invention;

FIG. 4 is a schematic view of the structure of the drum according to the present invention;

FIG. 5 is a schematic view of the structure of the threaded rod of the present invention;

Fig. 6 is a schematic view showing the internal structure of the enclosure of the present invention.

Fig. 7 is an enlarged view at a in fig. 6.

Fig. 8 is an enlarged view at B in fig. 6.

Fig. 9 is a schematic structural view of a lifting block in the present invention.

Fig. 10 is a cross-sectional view of a platen in accordance with the present invention.

Fig. 11 is a rear view of the platen of the present invention.

Fig. 12 is a schematic view of the internal structure of the transfer plate according to the present invention.

FIG. 13 is a schematic view showing the internal structure of the platen according to the present invention.

Fig. 14 is an enlarged view at C in fig. 13.

Fig. 15 is a schematic view showing the internal structure of the metering cylinder according to the present invention.

Fig. 16 is a schematic view showing a part of the structure of the housing case in the present invention.

In the figure: 1. a first bracket; 2. a mounting plate; 3. a riser; 4.a closed box; 5. a vent pipe; 6. a drain pipe; 7. a first electric push rod; 8. a second bracket; 9. a lifting plate; 91. an auxiliary frame; 92. a pulley; 93. a chute; 10. a motor; 11. a rotating drum; 12. a threaded rod; 13. a rotating block; 14. a connecting rod; 15. a connecting plate; 16. a fastening bolt; 17. a quantitative cylinder; 18. a mesh ring; 19. a second electric push rod; 20. a lifting rod; 21. a pressing plate; 22. square through groove; 23. a rotary groove; 24. a rotating shaft; 25. a rotating plate; 26. a torsion spring; 27. a ventilation chamber; 28. an exhaust hole; 29. a connecting pipe; 30. a U-shaped tube; 31. a positioning rod; 32. a first through pipe; 33. a second through pipe; 34. an air cushion; 35. a third electric push rod; 36. a sealing plate; 37. a storage groove; 38. a seal ring; 39. a storage case; 40. fourth electric putter.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-16, the present invention provides a technical solution:

Example 1

The utility model provides a marine sediment quantitative collection device, including first support 1, first support 1 can install the elevating gear at the external world, elevating gear is current device, do not make details in this department, can be provided with control panel on first support 1, utilize control panel can control the electrical equipment in this device, this technique is the conventional means in the art, do not make details in this department, fixedly mounting plate 2 on first support 1, fixedly mounting riser 3 on mounting plate 2, riser 3's lower terminal surface fixed mounting has L type locating lever 31, be provided with the through-hole one that is used for lifter 20 to pass on the locating lever 31, the through-hole makes lifter 20 stability when going up and down for a while, and can strengthen lifter 20 stability, can make the clamp plate 21 who descends certain position can not appear rocking phenomenon, be used for the enclosure 4 of enclosure space convenience collection sediment sealing ring on riser 3, the up end of enclosure 4 is used for rotary drum 11 and riser 20 to pass two inside walls of through-hole two of riser 4 all are provided with 38, can make use the sealing ring 11 and can be used for the inner side of the drain pipe 4 to seal up and seal up the drain pipe 4 when the side of the drain pipe 4 can be fixed in the drain pipe 4 can be fixed to the inner side of the sealed tank 4 of the drain pipe 5 when the drain pipe 4 is fixed according to the drain pipe 5 of the drain pipe 5 can be fixed in the side of the drain pipe 4 of the sealing box 4 can be fixed to the side of the drain pipe 4 to be arranged in the side of the drain pipe 4 to the side of the sealing can be fixed to the side of the side 6 to be in the side of the drain 4 to the drain pipe 4 to be in the side can is sealed to the side 6 to be in the lift 4 to the lift to can has the stability to be in the lift;

The mounting plate 2 is provided with a driving component, the driving component is provided with a quantifying cylinder 17 for quantitatively collecting marine sediments, the marine sediments in the quantifying cylinder 17 can be detached by rotating a fastening bolt 16, then the quantifying cylinder 17 is moved downwards, the marine sediments in the quantifying cylinder 17 can be taken out by using a connecting plate 15, the side surface of the quantifying cylinder 17 is provided with a grid ring 18 for discharging the seawater in the marine sediments, the seawater in the marine sediments can be discharged from the quantifying cylinder 17 by using the grid ring 18, the driving component comprises a first electric push rod 7 arranged on the mounting plate 2, the output end of the first electric push rod 7 is fixedly provided with a second bracket 8, the output end of the second bracket 8 is fixedly provided with a lifting plate 9, the side end surface of the lifting plate 9 is fixedly provided with an auxiliary bracket 91, the pulley 92 is rotatably arranged on the auxiliary frame 91, a sliding groove 93 which is in limit sliding with the pulley 92 is formed in the inner side wall of the vertical plate 3, the motor 10 is fixedly arranged on the lifting plate 9, the rotary drum 11 is fixedly arranged at the output end of the motor 10, the fourth electric push rod 40 is fixedly arranged in the rotary drum 11, the threaded rod 12 is arranged in the rotary drum 11 through a thread through groove thread, the rotating block 13 for connecting the output shaft of the fourth electric push rod 40 is rotatably arranged on the threaded rod 12, the connecting rod 14 is fixedly arranged at the bottom end of the threaded rod 12, the connecting plate 15 is fixedly arranged at one end, far away from the threaded rod 12, of the connecting rod 14, the connecting plate 15 is fixedly connected with the quantitative cylinder 17 through the fastening bolt 16, the threaded rod 12 can be pushed by the fourth electric push rod 40 to rotate through the thread through groove thread in the threaded rod 12 and the rotary drum 11, and the quantitative cylinder 17 can be driven to rotate while descending;

a dislodging assembly for dislodging marine sediment surface impurities is provided on the drive assembly and outside the metering cylinder 17.

Example 2

On the basis of the first embodiment, the expelling assembly is described in detail, the expelling assembly comprises a second electric push rod 19 mounted on a lifting plate 9, a lifting rod 20 is fixedly mounted at the output end of the second electric push rod 19, a pressing plate 21 is fixedly mounted on the lower end face of the lifting rod 20, a square through groove 22 is formed in the pressing plate 21, the square through groove 22 is convenient for a quantitative cylinder 17 to pass through the pressing plate 21, a rotary groove 23 is formed in the inner side face of the square through groove 22, a rotary shaft 24 is rotatably mounted in the rotary groove 23, a rotary plate 25 is fixedly mounted at one end, far from the rotary groove 23, of the rotary shaft 24, a torsion spring 26 is fixedly mounted on the rotary plate 25, the rotary plate jacked by the quantitative cylinder 17 can be restored to the original state by utilizing the torsion force of the torsion spring 26, one end, far from the rotary plate 25, of the torsion spring 26 is fixedly mounted in the rotary groove 23, and the rotary plate 25 can be unfolded to two sides through the rotary shaft 24 by thrust generated during descending of the quantitative cylinder 17.

Example 3

On the basis of embodiment one, in order to make the impurity that the revolving plate 25 dialled can not block up the exhaust hole, can directly dial impurity through exhaust hole 28 and open, the inside of revolving plate 25 is provided with ventilation cavity 27, the inside of ventilation cavity 27 is provided with the exhaust hole 28 with external intercommunication, the quantity of exhaust hole 28 is a plurality of, utilize a plurality of exhaust holes 28 can blow the ocean impurity that the revolving plate 25 dialled open, improve the effect that the revolving plate 25 dialled impurity, ventilation cavity 27 is inside be provided with the connecting pipe 29 with external intercommunication, connecting pipe 29 has U type pipe 30 through flexible hose fixed mounting, U type pipe 30 has for the convenience be connected with connecting pipe 29 on two revolving plates 25, the convenience can be respectively with the gas in the ventilation pipe 5 in the ventilation cavity 27 of two revolving plates 25, the one end that flexible hose was kept away from to U type pipe 30 is linked together with ventilation pipe 5, wherein flexible hose does not draw out in the figure, this flexible hose is current device, do not make specific details in this place, the inside of U type pipe 30 is provided with the valve through opening the valve, wherein valve is current device, can be directly let in the ventilation cavity 29 through flexible hose 30 again in the ventilation cavity can be followed by the fact through flexible hose 30.

Example 4

On the basis of the first embodiment, in order to enable the sealing effect of the sealing box 4 to be improved through the sealing plate 36, a containing groove 37 is formed in the lower end face of the inner side wall of the sealing box 4, the containing groove 37 can contain the sealing plate 36, third electric push rods 35 are fixedly arranged at the inner top of the containing groove 37, the number of the third electric push rods 35 is three, the sealing plate 36 in the containing groove 37 can be stretched out through the third electric push rods 35, the stretched sealing plate 36 can be directly inserted into marine sediments, the sealing plate 36 for enhancing the sealing effect of the sealing box 4 is fixedly arranged at the output end of the third electric push rods 35, and sealing performance between the sealing box 4 and the offshore bottom can be enhanced through the sealing plate 36.

Example 5

On the basis of the first embodiment, in order to further improve the sealing effect of the closed tank 4, the air cushion 34 is used for achieving the effect, the outer side surface of the closed tank 4 is fixedly provided with the containing shell 39, the containing shell 39 is arc-shaped, the air cushion 34 is arranged in the containing shell 39, the first through pipe 32 which is positioned in the closed tank 4 is fixedly arranged on the air pipe 5, one end of the first through pipe 32 which is far away from the air pipe 5 is fixedly provided with the second through pipe 33, one end of the second through pipe 33 which is far away from the first through pipe 32 is connected with the air cushion 34, the valve is arranged in the first through pipe 32 and is not drawn in the figure, when the valve is closed, gas in the air pipe 5 can directly enter the closed tank 4, a through groove which is communicated with the outside is formed in the containing shell 39, the air cushion 32 is opened through the valve in the containing shell, the gas can be introduced into the first through pipe 32 by using the air pipe 5, the second through pipe 33 can be introduced into the air cushion 34, the expanded through the through groove of the containing shell is protruded, the protruding through the containing shell can be tightly attached to the bottom of the closed tank, and the sealing plate can be further sealed on the sealing plate of the closed tank can be sealed on the sealing plate.

S1: firstly, placing a closed box at a position to be taken of marine near-shore sediments through a first bracket, sealing the position to be taken of the marine sediments by using the closed box, then filling gas into the closed box through an external air pump, then opening a valve in a drain pipe, and then draining water in the closed box out of the closed box through the drain pipe on the closed box;

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a marine sediment ration collection system, includes first support (1), its characterized in that: the marine sediment collection device is characterized in that a mounting plate (2) is fixedly mounted on the first support (1), a vertical plate (3) is fixedly mounted on the mounting plate (2), a closed box (4) used for conveniently collecting marine sediment in a closed space is fixedly mounted on the vertical plate (3), a vent pipe (5) used for ventilating the closed box (4) is fixedly mounted on the closed box (4), and a drain pipe (6) used for discharging water in the closed box (4) out of the closed box (4) is fixedly mounted on the left side of the closed box (4) and positioned on the vent pipe (5);

A driving assembly is arranged on the mounting plate (2), a quantifying cylinder (17) for quantitatively collecting marine sediments is arranged on the driving assembly, and a grid ring (18) for discharging seawater in the marine sediments is arranged on the side surface of the quantifying cylinder (17);

and a expelling assembly for expelling impurities on the surface of the marine sediment is arranged on the driving assembly and outside the quantitative cylinder (17).

2. The marine sediment quantitative collection assembly of claim 1, wherein: the driving assembly comprises a first electric push rod (7) mounted on a mounting plate (2), a second support (8) is fixedly mounted at the output end of the first electric push rod (7), a lifting plate (9) is fixedly mounted at the output end of the second support (8), a motor (10) is fixedly mounted on the lifting plate (9), a rotary drum (11) is fixedly mounted at the output end of the motor (10), a fourth electric push rod (40) is fixedly mounted inside the rotary drum (11), a threaded rod (12) is mounted inside the rotary drum (11) through threads, a rotating block (13) for connecting an output shaft of the fourth electric push rod (40) is rotatably mounted on the threaded rod (12), a connecting rod (14) is fixedly mounted at the bottom end of the threaded rod (12), a connecting plate (15) is fixedly mounted at one end of the connecting rod (14) away from the threaded rod (12), the connecting plate (15) is fixedly connected with a quantitative drum (17) through a fastening bolt (16), the threaded rod (12) can be pushed by the fourth electric push rod (40) to utilize the threaded rod (12) to drive the threaded rod (11) to rotate in the threaded drum (17) through threads simultaneously.

3. The marine sediment quantitative collection assembly of claim 2, wherein: the driving component comprises a second electric push rod (19) arranged on a lifting plate (9), a lifting rod (20) is fixedly arranged at the output end of the second electric push rod (19), a pressing plate (21) is fixedly arranged on the lower end face of the lifting rod (20), a square through groove (22) is formed in the pressing plate (21), a rotating groove (23) is formed in the inner side face of the square through groove (22), a rotating shaft (24) is rotatably arranged in the rotating groove (23), a rotating plate (25) is fixedly arranged at one end, far away from the rotating groove (23), of the rotating shaft (24), a torsion spring (26) is fixedly arranged at one end, far away from the rotating plate (25), of the torsion spring (26) is fixedly arranged in the rotating groove (23), and the rotating plate (25) in a horizontal state can be unfolded to two sides through the rotating shaft (24) by virtue of thrust generated during descending of the quantifying cylinder (17).

4. A marine sediment quantitative collection assembly according to claim 3, wherein: the inside of revolving plate (25) is provided with ventilation chamber (27), the inside of ventilation chamber (27) is provided with exhaust hole (28) with external intercommunication, ventilation chamber (27) inside be provided with connecting pipe (29) of external intercommunication, connecting pipe (29) are through flexible hose fixed mounting have U type pipe (30), the one end that flexible hose was kept away from to U type pipe (30) is linked together with breather pipe (5), the inside of U type pipe (30) is provided with the valve, through with the valve is opened, can let in gas U type pipe (30) in, rethread flexible hose and connecting pipe (29) are with gas let in ventilation chamber (27).

5. The marine sediment quantitative collection assembly of claim 2, wherein: the sealing device is characterized in that a storage groove (37) is formed in the lower end face of the inner side wall of the sealing box (4), a third electric push rod (35) is fixedly arranged at the inner top of the storage groove (37), and a sealing plate (36) for enhancing the sealing effect of the sealing box (4) is fixedly arranged at the output end of the third electric push rod (35).

6. The marine sediment quantitative collection assembly of claim 1, wherein: the utility model discloses a sealed box, including sealed box (4), sealing box, valve, vent pipe (33), valve, air cushion (34) are provided with to the inside of receiving shell (39), fixed mounting has first siphunculus (32) that are in sealing box (4) inside on vent pipe (5), one end fixed mounting that vent pipe (5) was kept away from to first siphunculus (32) has second siphunculus (33), one end that first siphunculus (32) was kept away from to second siphunculus (33) is connected with air cushion (34), the inside of first siphunculus (32) is provided with the valve, the inside of receiving shell (39) is provided with the logical groove with external intercommunication, opens through the valve, can be with utilizing vent pipe (5) to let in first siphunculus (32) in the rethread second siphunculus (33) can let it in air cushion (34).

7. The marine sediment quantitative collection assembly of claim 1, wherein: the lower end face of the vertical plate (3) is fixedly provided with an L-shaped positioning rod (31), and the positioning rod (31) is provided with a first through hole for the lifting rod (20) to pass through.

8. The marine sediment quantitative collection assembly of claim 1, wherein: the upper end face of the closed box (4) is used for the inner side wall of a through hole II through which the rotary drum (11) and the lifting rod (20) pass is provided with a sealing ring (38).

9. The marine sediment quantitative collection assembly of claim 2, wherein: the lifting plate is characterized in that an auxiliary frame (91) is fixedly arranged on the side end face of the lifting plate (9), a pulley (92) is rotatably arranged on the auxiliary frame (91), and a sliding groove (93) which is used for limiting and sliding with the pulley (92) is formed in the inner side wall of the vertical plate (3).

10. A method for quantitatively collecting marine sediments, comprising a device for quantitatively collecting marine sediments according to any one of claims 1 to 9, characterized by comprising the steps of:

S1: firstly, placing a closed box (4) at a position to be taken out of marine near-shore sediments through a first bracket (1), sealing the position to be taken out of the marine sediments by using the closed box (4), then filling gas into the closed box (4) through an external air pump, opening a valve in a drain pipe (6), and then draining water in the closed box (4) out of the closed box (4) through the drain pipe (6) on the closed box (4);

S2: the valve in the drain pipe (6) is closed, then the sealing plate (36) is driven by the third electric push rod (35) to extend into the sludge near the ocean, the sealing box (4) can be sealed for the first time, meanwhile, the valve in the first through pipe (32) is opened, gas is discharged into the first through pipe (32) through the vent pipe (5), the gas is filled into the air cushion (34) through the second through pipe (33), then the air cushion (34) in the storage shell (39) can extend outwards through the through groove, the sealing box (4) and the ocean bottom can be sealed for the second time by utilizing the air cushion (34), and the sealing effect of the sealing box (4) and the ocean bottom can be improved;

S3: the second bracket (8) is driven to move downwards through the first electric push rod (7), so that the lifting plate (9) can be driven to move, the lifting plate (9) can slide in the chute (93) in a limiting manner through the pulley (92), the rotary drum (11) is driven to rotate through the motor (10), meanwhile, the threaded rod (12) is driven to move downwards through the fourth electric push rod (40), the threaded rod (12) rotates in the rotary drum (11) through the rotary block (13) and the threaded rod (12), the quantitative cylinder (17) can synchronously follow the threaded rod (12) to descend and rotate through the connecting rod (14), the rotary plate (25) in a horizontal state can be directly rotated outwards through the lower pressure and the rotating force of the quantitative cylinder (17), impurities on the surface of a sediment can be pulled out through the rotary plate (25), the valve in the first through the rotary pipe (32) is opened at the same time of rotation, gas is introduced into the U-shaped pipe (30) through the vent pipe (5), the gas can be introduced into the connecting pipe (29) through the telescopic hose and finally the gas can be directly discharged into the rotary plate (27) through the rotary air vent hole (27), and finally the gas can be directly discharged out of the rotary plate (27);

S4: the quantitative cylinder (17) can be directly drilled into the sediment by pushing the threaded rod (12), the sediment can directly enter the quantitative cylinder (17) through a feed inlet on the quantitative cylinder (17), finally the sediment can be collected by the quantitative cylinder (17), and then the sediment can be quantitatively taken out by lifting the threaded rod (12).