A sampling device for marine geological investigations

Abstract

A kind of sampling device for marine geological survey belongs to the field of marine geological survey, to solve the problem that sample mixing occurs, which will cause the sample characteristics originally representing the information of specific location and depth to be destroyed, so that the analysis result cannot accurately reflect the true situation of each sampling point, and then cause inaccurate data, seriously affect the reliability and scientificity of marine geological survey result, a kind of sampling device for marine geological survey, including cylinder placing box, negative pressure machine arranged outside the cylinder placing box, first hose communicated with the input end of negative pressure machine, negative pressure head communicated with the other end of first hose, second hose communicated with the output end of negative pressure machine, by setting elastic mechanism, when the pushing mechanism moves downward, the elastic mechanism is driven to move upward, each sampling is separated, compared with the prior art, reduce the mixing of sample, thereby improve the accuracy of sample.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of marine geological survey, in particular to a sampling device for marine geological survey. BACKGROUND

[0002] The sampling device for marine geological survey is mainly used for collecting geological samples at the bottom of the sea, including sediments, rocks, etc., so that scientists can study the marine geological structure, geological history, marine environmental changes, etc.

[0003] Publication No. CN118275164B discloses a marine geological sediment sampling device, belonging to the field of marine geological sampling technology, to solve the problem of low efficiency of existing sampling devices in penetrating sediments. During operation, when the contact box falls on the sediments, the contact box is equipped with a counterweight, and the gravity of the counterweight causes the lower end of the contact box to penetrate into the sediments. Marine geological survey is an important means of exploring the mysteries of the ocean and understanding the evolution of the Earth, and plays an irreplaceable role in the development and utilization of marine resources, the protection of marine safety, and the study of global climate change. Among many survey tasks, sampling and analysis of seabed silt is one of the key steps to obtain marine geological information.

[0004] Seabed silt, as an important sediment at the bottom of the sea, contains rich geological history information. Changes in its composition, structure and properties can reflect the evolution of the marine environment and the characteristics of geological tectonic activity. Through detailed analysis of seabed silt samples, scientists can infer changes in the marine ecosystem, trends in paleoclimate changes, and provide necessary basic data for seabed mineral resource exploration, marine engineering construction, etc.

[0005] In actual operation, the device for sampling seabed silt often adopts the method of placing all collected silt samples in a placement box. However, due to its special physical properties, seabed silt has significant fluidity. When silt samples from different locations and depths are collected together in the placement box, they are easily mixed with each other during transportation and subsequent processing of the device due to the rocking and vibration of the ship and the gravity of the samples themselves. Once the samples are mixed, the characteristics of the samples representing specific locations and depths are destroyed, making the analysis results unable to accurately reflect the true situation of each sampling point, thus causing inaccurate data and seriously affecting the reliability and scientificity of marine geological survey results. This data error may mislead the evaluation of marine geological environment, bringing potential risks to related decisions on marine resource development, environmental protection and engineering construction, etc.

[0006] To solve the above problems, a sampling device for marine geological survey is proposed. SUMMARY

[0007] The present application aims to provide a sampling device for marine geological survey, solves the problem of inaccurate data.

[0008] To achieve the above object, the present application provides the following technical solutions: a sampling device for marine geological survey, comprising a cylindrical placing box, a negative pressure machine arranged outside the cylindrical placing box, a first hose communicated with the input end of the negative pressure machine, a negative pressure head communicated with the other end of the first hose, a second hose communicated with the output end of the negative pressure machine, a pushing mechanism arranged above the cylindrical placing box, and an elastic mechanism arranged inside the cylindrical placing box.

[0009] The pushing mechanism comprises a rotating assembly and a reciprocating assembly, and the reciprocating assembly is arranged inside the rotating assembly.

[0010] The rotating assembly comprises a first support cylinder fixedly connected to the inside of the upper part of the cylindrical placing box, a rotating cylinder rotatably connected to the upper part of the first support cylinder, a rotating plate rotatably connected to the upper surface of the rotating cylinder, a pulling plate fixedly connected to the upper part of the rotating plate, an electric push rod fixedly connected to the middle of the lower surface of the rotating plate, a rotating motor fixedly connected to the output end of the electric push rod, a rotating shaft fixedly connected to the output end of the rotating motor, a first connecting plate vertically slidably connected to the outside of the rotating shaft, a second connecting plate fixedly connected to the other end of the first connecting plate, the second connecting plate being fixedly connected to the negative pressure head, a controller fixedly connected to the outside of the lower surface of the rotating plate, the first connecting plate being fixedly connected to the negative pressure machine, a discharge port being formed in the inside of the cylindrical placing box away from the central axis of the rotating shaft and being communicated with the outside of the cylindrical placing box, and a plug head being threadedly connected to the inside of the discharge port.

[0011] Preferably, the central axis of the second connecting plate is parallel to the central axis of the cylindrical placing box.

[0012] Preferably, the central axis of the first support cylinder, the central axis of the rotating cylinder, the central axis of the rotating plate, and the central axis of the cylindrical placing box are on the same vertical central axis.

[0013] Preferably, the reciprocating assembly comprises a rotating disc fixedly connected to the outside of the output end of the electric push rod, the lower end of the rotating disc is fixedly connected with a rotating ring, the inside of the rotating ring is provided with a first guide groove, one end of the first guide groove is communicated with a second guide groove, the inside of the second guide groove is provided with a first guide rod, one end of the first guide rod is fixedly connected with a first connecting rod fixedly connected with the first connecting plate, the inside of the lower side of the second connecting plate is provided with a sliding groove, the inside of the sliding groove is provided with a sliding block, one end of the sliding block is fixedly connected with a scraper fixedly connected with the first connecting plate, the inside of the rotating cylinder is provided with a first hole, the lower inside of the rotating cylinder is provided with a first baffle, the connection between the first baffle and the first connecting plate is fixed connection, and the width of the first baffle is greater than the width of the first hole.

[0014] Preferably, the first guide groove is provided with a plurality of first guide grooves, and the first guide grooves are circumferentially equidistantly distributed on the inside of the rotating ring, and the appearance structure of the first guide groove is horizontal circular arc shape.

[0015] Preferably, the number of the second guide groove is consistent with the number of the first guide groove, the appearance structure of the second guide groove is "V" shape, and the number of the second guide groove is spaced apart from the first guide groove.

[0016] Preferably, the width of the sliding block close to the one end of the second connecting plate central axis is greater than the width of the sliding block away from the one end of the second connecting plate central axis, and the up-down direction length of the sliding block is less than the up-down direction length of the sliding groove.

[0017] Preferably, the elastic mechanism comprises a first partition plate fixedly connected in the inside of the cylinder placing box, the number of the first partition plate is consistent with the number of the second guide groove, the inside wall of the cylinder placing box is communicated with a second hole, a plurality of the second holes are equidistantly distributed on the upper wall of the one side of the cylinder placing box, and a plurality of groups of the second holes are provided along the circumferential direction of the cylinder placing box, the upper wall of the one side of the cylinder placing box is communicated with a groove, the inside of the second hole is slidably connected with a second partition plate, the upper side of the one side of the cylinder placing box is fixedly connected with a second baffle, the second baffle and the cylinder placing box are fixedly connected with a spring, the inner wall of the cylinder placing box is provided with a push plate, the inside of the upper side of the push plate is provided with a third hole, the rotating shaft is nested in the inside of the third hole, the lower end of the rotating shaft is rotatably connected with a first rack, the inside of the first rack is meshingly connected with a gear, the outside of the gear is meshingly connected with a second rack fixedly connected with the push plate, the upper surface of the third baffle is fixedly connected with a telescopic rod fixedly connected with the first connecting plate, the inside of the gear is fixedly connected with a rotating shaft rotatably connected with the cylinder placing box, and the inside of the push plate is provided with a fourth hole for the rotating shaft to be nested.

[0018] Preferably, the upper surface of the second partition plate is a horizontal plane, and the lower surface of the second partition plate is an inclined plane.

[0019] Preferably, the upper end of the pushing plate is conical in appearance, the lower end of the pushing plate is cylindrical in appearance, and the outer side of the pushing plate is attached to the inner side of the cylinder placing box.

[0020] Compared with the prior art, the sampling device for marine geological survey has the advantages that the elastic mechanism is arranged, the elastic mechanism is driven to move upward when the pushing mechanism moves downward, the sampling is separated each time, the mixing of the samples is reduced, and the accuracy of the samples is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;

[0022] Figure 2 It is a schematic diagram of the front view of the rotating cylinder of the present application;

[0023] Figure 3 It is a schematic diagram of the structure of the present application; Figure 2 at A in the middle;

[0024] Figure 4 It is a schematic diagram of the structure of the present application; Figure 2 at B in the middle;

[0025] Figure 5 It is a schematic diagram of the structure of the present application; Figure 2 at C in the middle;

[0026] Figure 6 It is a schematic diagram of the second baffle of the present application;

[0027] Figure 7 It is a schematic diagram of the left view of the negative pressure head of the present application;

[0028] Figure 8 It is a schematic diagram of the top view of the rotating ring of the present application.

[0029] In the figure: 1, cylinder placing box; 2, negative pressure machine; 3, first hose; 4, negative pressure head; 7, second hose; 5, pushing mechanism; 6, elastic mechanism; 51, rotating assembly; 52, reciprocating assembly; 511, first supporting cylinder; 512, rotating cylinder; 513, rotating plate; 514, pulling plate; 515, electric push rod; 516, rotating motor; 517, rotating shaft; 518, first connecting plate; 5110, second connecting plate; 519, controller; 5111, discharge port; 5112, blocking head; 521, rotating disc; 522, rotating ring; 523, first guide groove; 524, second guide groove; 525, first guide rod; 526, first connecting rod; 527, sliding groove; 528, sliding block; 529, scraper; 5210, first hole; 5211, first baffle; 601, first partition plate; 602, second hole; 603, groove; 604, second partition plate; 605, second baffle; 606, spring; 607, pushing plate; 608, third hole; 609, first rack; 610, gear; 611, second rack; 612, third baffle; 613, telescopic rod; 614, rotating shaft; 615, fourth hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figures 1-8 The present application provides a technical solution: a sampling device for marine geological survey, comprising a cylinder placing box 1, a negative pressure machine 2 arranged outside the cylinder placing box 1, a first hose 3 connected to the input end of the negative pressure machine 2, a negative pressure head 4 connected to the other end of the first hose 3, a second hose 7 connected to the output end of the negative pressure machine 2, a pushing mechanism 5 arranged above the cylinder placing box 1, and an elastic mechanism 6 arranged inside the cylinder placing box 1.

[0032] The pushing mechanism 5 comprises a rotating assembly 51 and a reciprocating assembly 52, and the reciprocating assembly 52 is arranged inside the rotating assembly 51.

[0033] The rotating assembly 51 comprises a first supporting cylinder 511 fixedly connected to the upper side of the inner side of the cylinder placing box 1, a rotating cylinder 512 rotatably connected to the upper side of the first supporting cylinder 511, a rotating plate 513 rotatably connected to the upper surface of the rotating cylinder 512, a pulling plate 514 fixedly connected to the upper side of the rotating plate 513, an electric push rod 515 fixedly connected to the lower surface of the rotating plate 513, a rotating motor 516 fixedly connected to the output end of the electric push rod 515, a rotating shaft 517 fixedly connected to the output end of the rotating motor 516, a first connecting plate 518 vertically slidably connected to the outer side of the rotating shaft 517, a second connecting plate 5110 fixedly connected to the other end of the first connecting plate 518, the central axis of the second connecting plate 5110 being parallel to the central axis of the cylinder placing box 1, the second connecting plate 5110 being fixedly connected to the negative pressure head 4, a controller 519 fixedly connected to the lower surface of the rotating plate 513, the first connecting plate 518 being fixedly connected to the negative pressure machine 2, the central axis of the first supporting cylinder 511, the central axis of the rotating cylinder 512, the central axis of the rotating plate 513 and the central axis of the cylinder placing box 1 being on the same vertical central axis, the cylinder placing box 1 being provided with a discharge port 5111 on the inner side away from the central axis of the rotating shaft 517, the discharge port 5111 being in communication with the outer side of the cylinder placing box 1, and a plug head 5112 being threadedly connected to the inner side of the discharge port 5111.

[0034] The reciprocating assembly 52 comprises a rotating disc 521 fixedly connected outside the output end of the electric push rod 515, the lower end outside of the rotating disc 521 is fixedly connected with a rotating ring 522, the inside of the rotating ring 522 is provided with a first guide groove 523, a plurality of first guide grooves 523 are arranged, and the first guide grooves 523 are circumferentially equidistantly distributed on the inside of the rotating ring 522, and the appearance structure of the first guide groove 523 is a horizontal circular arc, so that the first guide rod 525 does not move up and down when rotating on the inside of the first guide groove 523, one end of the first guide groove 523 is communicated with a second guide groove 524, the number of the second guide groove 524 is consistent with the number of the first guide groove 523, and the appearance structure of the second guide groove 524 is a "V" shape, so that the first guide rod 525 can move up and down when moving on the inside of the first guide groove 523, the inside of the second guide groove 524 is provided with the first guide rod 525, one end of the first guide rod 525 is fixedly connected with the first connecting rod 526 fixedly connected with the first connecting plate 518, the inside of the lower side of the second connecting plate 5110 is provided with a sliding groove 527, the inside of the sliding groove 527 is provided with a sliding block 528, one end of the sliding block 528 is fixedly connected with a scraper 529 fixedly connected, the inside of the rotating cylinder 512 is provided with a first hole 5210, the lower side of the inside of the rotating cylinder 512 is provided with a first baffle 5211, the connection between the first baffle 5211 and the first connecting plate 518 is fixed connection, the width of the first baffle 5211 is greater than the width of the first hole 5210, the width of the end of the sliding block 528 close to the central axis of the second connecting plate 5110 is greater than the width of the end of the sliding block 528 away from the central axis of the second connecting plate 5110, and the up-down direction length of the sliding block 528 is less than the up-down direction length of the sliding groove 527, so that the sliding block 528 does not move out of the inside of the sliding groove 527 when moving on the inside of the sliding groove 527.

[0035] The elastic mechanism 6 comprises a first partition plate 601 fixedly connected inside the cylindrical placing box 1, the first partition plates 601 arranged in an annular array divide the inside of the cylindrical placing box 1 into multiple partition spaces, the number of the first partition plates 601 is consistent with the number of the second guide grooves 524, the inner side wall of the cylindrical placing box 1 is provided with second holes 602, multiple second holes 602 are equidistantly distributed on the upper and lower sides, and multiple groups of second holes 602 are arranged along the circumferential direction of the cylindrical placing box 1, one group of second holes 602 is correspondingly connected with the partition space on the same side, the second holes 602 are connected with a groove 603 on the upper wall close to one side of the cylindrical placing box 1, the inner side of the second holes 602 is slidably connected with a second partition plate 604, the second partition plates 604 on the same side extend into the partition space on the same side and divide the partition space into multiple storage spaces, each storage space is correspondingly connected with the discharge port 5111, the second partition plate 604 close to the upper wall of one side of the cylindrical placing box 1 is fixedly connected with a second baffle 605, the second baffle 605 and the cylindrical placing box 1 are fixedly connected with a spring 606, the inner wall of the cylindrical placing box 1 is provided with a push plate 607, the upper part of the push plate 607 is provided with a third hole 608, the rotating shaft 517 is nested in the third hole 608, the lower end of the rotating shaft 517 is rotatably connected with a first rack 609, the inner side of the first rack 609 is meshingly connected with a gear 610, the outer side of the gear 610 is meshingly connected with a second rack 611 fixedly connected with the push plate 607, the upper side of the cylindrical placing box 1 is rotatably connected with a third baffle 612 connected with the second hose 7, the upper surface of the third baffle 612 is fixedly connected with an extension rod 613 fixedly connected with the first connecting plate 518, the inner part of the gear 610 is fixedly connected with a rotating shaft 614 rotatably connected with the cylindrical placing box 1, the inner part of the push plate 607 is provided with a fourth hole 615 for the rotating shaft 614 to be nested, the upper surface of the second partition plate 604 is a horizontal surface, and the lower surface of the second partition plate 604 is an inclined surface, so that the second partition plate 604 can seal the upper surface of the second hole 602, the upper end of the push plate 607 is conical in appearance, the lower end of the push plate 607 is cylindrical in appearance, and the outer side of the push plate 607 is flush with the inner side of the cylindrical placing box 1, so that the push plate 607 can push the second partition plate 604 to move outward.

[0036] When sampling is needed, the rope or connecting plate is used to fix the pulling plate 514, the whole device is put into the sea, the support under the cylinder placing box 1 is inserted into the seabed, the rotating motor 516 is started to drive the first connecting plate 518 and the rotating cylinder 512 to rotate, the second connecting plate 5110, the first hose 3, the negative pressure machine 2, the negative pressure head 4, the telescopic rod 613 and the third baffle 612 are driven by the negative pressure machine 2 to rotate, under the action of gravity, the second connecting plate 5110 is inserted into the inside of the silt, a part of the silt is rotated and pushed, when the first connecting plate 518 rotates, the first connecting rod 526 and the first guide rod 525 are driven to rotate, because the first guide groove 523 is provided with a plurality of arc equidistantly distributed on the inside of the rotating ring 522, and the appearance structure of the first guide groove 523 is a horizontal circular arc, the number of the second guide groove 524 is consistent with that of the first guide groove 523, and the appearance structure of the second guide groove 524 is a "V" shape, and the number of the second guide groove 524 is spaced apart from that of the first guide groove 523, so that when the first guide rod 525 rotates in the first guide groove 523, the first guide rod 525 drives the first connecting rod 526 and the first connecting plate 518 to move upwards, so that the second connecting plate 5110 and the negative pressure head 4 rotate upwards and do not contact the surface of the silt, the sliding block 528 drives the scraper 529 to rotate to accumulate the silt, when the first guide rod 525 moves to the inside of the second guide groove 524, the first guide rod 525 drives the first connecting rod 526 and the first connecting plate 518, the second connecting plate 5110 and the negative pressure head 4 to move downwards to cover the accumulated silt, at this time, the program in the controller 519 controls the negative pressure machine 2 to start, the accumulated silt enters the first hose 3, enters the second hose 7 and enters the inside of the cylinder placing box 1 between the first partition plates 601 to complete sampling, and the action is repeated, after the scraper 529 rotates one circle to complete sampling, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525 and the negative pressure head 4 to move downwards for the next circle of sampling.

[0037] Because the first guide groove 523 is provided with a plurality of arc equidistantly distributed on the inside of the rotating ring 522, and the appearance structure of the first guide groove 523 is a horizontal circular arc, the number of the second guide groove 524 is consistent with that of the first guide groove 523, and the appearance structure of the second guide groove 524 is a "V" shape, and the number of the second guide groove 524 is spaced apart from that of the first guide groove 523, so that when the first guide rod 525 rotates in the first guide groove 523, the first guide rod 525 drives the first connecting rod 526 and the first connecting plate 518 to move upwards, so that the second connecting plate 5110 and the negative pressure head 4 rotate upwards and do not contact the surface of the silt, the sliding block 528 drives the scraper 529 to rotate to accumulate the silt, when the first guide rod 525 moves to the inside of the second guide groove 524, the first guide rod 525 drives the first connecting rod 526 and the first connecting plate 518, the second connecting plate 5110 and the negative pressure head 4 to move downwards to cover the accumulated silt, at this time, the program in the controller 519 controls the negative pressure machine 2 to start, the accumulated silt enters the first hose 3, enters the second hose 7 and enters the inside of the cylinder placing box 1 between the first partition plates 601 to complete sampling, and the action is repeated, after the scraper 529 rotates one circle to complete sampling, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraper 529, the first guide rod 525 and the negative pressure head 4 to move downwards for the next circle of sampling.

[0038] Because the scraper 529 is always inserted into the inside of the silt to push the silt, the circumferential silt can be pushed up and then adsorbed into the inside of the cylinder placing box 1 by the negative pressure head 4 for storage, so that the sampling is more comprehensive.

[0039] After the scraping plate 529 completes one circle of sampling, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraping plate 529, the first guide rod 525, and the negative pressure head 4 to move downward for the next circle of sampling. The depth of the scraping plate 529 in one pass is not very deep, so when the mud is taken out, a vacuum-like environment is formed around the seawater, which moves inward under pressure, driving the surrounding surface mud inward, which reduces the accuracy of subsequent sampling. Because the scraping plate 529 and the negative pressure head 4 are used for sampling, after one circle, the next circle is rotated, and the depth generated in between is not very deep. It is not like the sampling cylinder directly inserted into the mud to the required depth and then pulled out, which generates a large impact. Therefore, after the scraping plate 529 completes one circle of sampling, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraping plate 529, the first guide rod 525, and the negative pressure head 4 to move downward for the next circle of sampling, which reduces the seawater around the un-sampled mud and improves the accuracy of subsequent sampling.

[0040] After the scraping plate 529 completes one circle of sampling, the electric push rod 515 is started to drive the rotating motor 516, the rotating ring 522, the scraping plate 529, the first guide rod 525, and the negative pressure head 4 to move downward for the next circle of sampling. The scraping plate 529 and the negative pressure head 4 do not need to move downward by much distance, and the extrusion of the mud is not very deep, which reduces the destruction of the internal sample of the mud and improves the completeness of the sampling.

[0041] After the scraping plate 529 completes one circle of sampling, the electric push rod 515 is started to drive the rotating motor 516 to move downward, driving the rotating shaft 517 and the first rack 609 connected to the rotating shaft 517 to move downward, causing the gear 610 to rotate and drive the second rack 611 to move upward. The upper end of the push plate 607 is conical in appearance, and the lower end is cylindrical. The outer side of the push plate 607 is in contact with the inner side of the cylinder box 1. The upper surface of the second partition 604 is horizontal, and the lower surface is inclined. When the push plate 607 moves upward, it pushes the second partition 604 outward along the direction of the second hole 602, blocking the mud sample that has just been absorbed. The upper surface of the second partition 604 is horizontal and can be used as a carrier for the next mud sample, reducing sample mixing and improving sample accuracy.

[0042] When the electric push rod 515 moves downward for the next sampling, the previous sample is isolated and separated, avoiding the next sample from mixing with the previous sample due to impact, and further improving the accuracy of the sample.

[0043] After the sampling is completed, the whole device is pulled out from the seabed and placed on a stable platform. When the sample is discharged, the corresponding plug head 5112 is rotated so that the sample flows out from the discharge port 5111, and the final sampling is completed.

[0044] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made in the embodiments without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A sampling device for marine geological survey, comprising a cylindrical placing box (1), a negative pressure machine (2) arranged outside the cylindrical placing box (1), a first hose (3) communicated with the input end of the negative pressure machine (2), a negative pressure head (4) communicated with the other end of the first hose (3), and a second hose (7) communicated with the output end of the negative pressure machine (2), characterized in that: The upper portion of the cylinder placement box (1) is provided with a pushing mechanism (5), the inside of the cylinder placement box (1) is provided with an elastic mechanism (6), the sliding block (528) of the pushing mechanism (5) drives the scraper (529) to rotate to accumulate the sludge, when the first guide rod (525) of the pushing mechanism (5) moves to the inside of the second guide groove (524), the first guide rod (525) drives the negative pressure head (4) to move downward to cover the accumulated sludge, and the sludge is sucked into the inside of the cylinder placement box (1) by the negative pressure machine (2); The elastic mechanism (6) comprises a plurality of first partition plates (601) arranged in an annular array, the plurality of first partition plates (601) separate the inside of the cylinder placement box (1) into a plurality of separated spaces, the inside wall of the cylinder placement box (1) is communicated with a plurality of second holes (602) arranged in a group, the second holes (602) are equidistantly distributed upwards and downwards, and the second holes (602) are provided with a plurality of groups along the circumferential direction of the cylinder placement box (1), and the inside of the second hole (602) is slidably connected with a second partition plate (604), so that the separated space is divided into a plurality of storage spaces in the longitudinal direction. After the scraper (529) rotates one circle to complete sampling, the electric push rod (515) is started to drive the scraper (529) and the negative pressure head (4) to move downward to sample the next circle, and the electric push rod (515) drives the rotating shaft (517) to move downward, so as to drive the push plate (607) to move upward through the first rack (609), the gear (610) and the second rack (611). When the push plate (607) moves upward, the second partition plate (604) is pushed along the inclined lower surface of the second partition plate (604) to move outward along the direction of the second hole (602), so as to block the sludge sample just adsorbed.

2. The sampling device of claim 1, wherein: The pushing mechanism (5) comprises a rotating assembly (51) and a reciprocating assembly (52), and the reciprocating assembly (52) is arranged inside the rotating assembly (51).

3. The sampling device of claim 2, wherein, The rotating assembly (51) comprises a first support cylinder (511) fixedly connected to the upper portion of the inside of the cylinder placement box (1), a rotating cylinder (512) rotatably connected to the upper portion of the first support cylinder (511), a rotating plate (513) rotatably connected to the upper surface of the rotating cylinder (512), an electric push rod (515) fixedly connected to the lower surface of the rotating plate (513), a rotating motor (516) fixedly connected to the output end of the electric push rod (515), a rotating shaft (517) fixedly connected to the output end of the rotating motor (516), a first connecting plate (518) vertically slidably connected to the outside of the rotating shaft (517), a second connecting plate (5110) fixedly connected to the other end of the first connecting plate (518), and the negative pressure head (4) is fixedly connected to one end of the second connecting plate (5110).

4. The sampling device of claim 3, wherein: The reciprocating assembly (52) comprises a rotating disc (521) fixedly connected outside the output end of the electric push rod (515), the lower end of the rotating disc (521) is fixedly connected with a rotating ring (522), the inside of the rotating ring (522) is provided with a first guide groove (523), one end of the first guide groove (523) is communicated with a second guide groove (524), the inside of the second guide groove (524) is provided with a first guide rod (525), one end of the first guide rod (525) is fixedly connected with a first connecting rod (526) fixedly connected with a first connecting plate (518), the inside of the lower side of the second connecting plate (5110) is provided with a sliding groove (527), the inside of the sliding groove (527) is provided with a sliding block (528), one end of the sliding block (528) is fixedly connected with a scraper (529).

5. The sampling device of claim 1, wherein: The second partition plate (604) is slidably connected in the second hole (602) in the side wall of the cylindrical placing box (1), the lower surface of the second partition plate (604) is an inclined surface, and the upper end of the push plate (607) is conical.

6. The sampling device of claim 5, wherein: The second partition plate (604) is fixedly connected with a second baffle (605) above the side of the cylindrical placing box (1), and the second baffle (605) is fixedly connected with a spring (606) between the cylindrical placing box (1).

7. The sampling device of claim 1, wherein: The outer side surface of the push plate (607) is attached to the inner side surface of the cylindrical placing box (1).

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