A sediment sampling device for land quality investigation

Abstract

The invention discloses a sediment sampling device for land quality investigation, relates to the technical field of soil sampling, and mainly solves the problems that the sampling samples of the existing sampling equipment are easy to lose and the sampling depth is difficult to confirm. The device comprises a connecting column and a truncated cone connecting frame connected to the connecting column, a sampling tube is fixedly connected to the inner side of the truncated cone connecting frame, a closing tube is sealed and sleeved on the outer side of the sampling tube, a plug-in cone is installed at the bottom of the sampling tube, the sampling tube and the closing tube are rotatably installed, a plurality of sampling holes are spirally distributed on the side wall of the sampling tube, a lifting receiving mechanism and a sampling mechanism are arranged in the sampling tube, a clearance groove is arranged on the side wall of the closing tube, the sampling mechanism and the sampling tube are synchronously rotatably installed, the sampling mechanism is aligned with the clearance groove on the closing tube and passes through the sampling hole and the clearance groove to perform sediment sampling, so as to realize equal-spaced sampling of sediments at different depths, and the obtained samples are stored in a receiving spoon to avoid loss caused by contact between the samples and the outside.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a bottom mud sampling device for land quality investigation. Background Art

[0002] Bottom sediment refers to fine-grained soil containing organic matter that is deposited in still water and slow-flowing water environments. By sampling and testing the bottom sediment, it is possible to monitor underwater water quality and provide reference data for water environment management. At the same time, the water pollution situation in different periods can be obtained based on the bottom sediment sampling and analysis at different depths.

[0003] Most existing sampling equipment uses direct salvage to collect samples when sampling sediment. The collected silt samples are easily lost with the water body. At the same time, it is difficult to confirm the sampling depth of the sediment, which can easily cause inaccurate sediment detection data. Summary of the invention

[0004] The purpose of the present invention is to provide a sediment sampling device for land quality investigation to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sediment sampling device for land quality investigation comprises a plurality of connecting columns, which are connected by threads, a handle is arranged at the end of the connecting column, a truncated cone connecting frame is connected to the other end of the connecting column, a sampling tube is fixedly connected to the inner side of the truncated cone connecting frame, a closing tube is sealed and sleeved on the outer side of the sampling tube, a plug-in cone is installed in a closed bottom of the sampling tube, the sampling tube and the closing tube are rotatably installed, a plurality of sampling holes are spirally distributed on the side wall of the sampling tube, a lifting receiving mechanism is arranged in the sampling tube, a sampling mechanism is arranged on the lifting receiving mechanism, a vertical making way groove is arranged on the side wall of the closing tube, the sampling mechanism and the closing tube are synchronously rotatably installed, the sampling mechanism is aligned with the making way groove on the closing tube, and when the sampling mechanism is aligned with the sampling hole, the sediment is sampled through the sampling hole and the making way groove.

[0007] As a further solution of the present invention: the lifting and receiving mechanism includes a lifting frame arranged on the inner side of the sampling cylinder, vertical matching grooves are evenly arranged on the inner side of the sampling cylinder, matching blocks are arranged on the edges of the lifting frame corresponding to the vertical matching grooves, the lifting frame is installed by sliding between the matching blocks and the vertical matching grooves, a motor three is arranged at the top center of the sampling cylinder, a screw is connected to the motor three, the screw is threadedly connected to the lifting frame, plug-in columns one are arranged at intervals on the circumference of the lifting frame corresponding to the arrangement angle of the sampling holes, a tensioning spring is arranged between the plug-in column one and the lifting frame, a receiving spoon is connected to the upper end of the plug-in column one, and the receiving spoon is arranged to point to the central axis of the lifting frame.

[0008] As a further solution of the present invention: The sampling mechanism includes a socket tooth rotatably installed coaxially with the lifting frame. A socket disk is fixedly arranged on the upper side of the socket tooth. A driving gear is rotatably installed on the lifting frame. The driving gear is connected to a power motor. The driving gear meshes with the socket tooth. An extension frame is connected to the socket disk. A vertical plate is arranged on the extension frame. A rotary motor is arranged on the vertical plate. A telescopic cylinder II is connected to the output shaft of the rotary motor. The telescopic cylinder II is connected to a sampling spoon. A telescopic cylinder I is arranged at the bottom of the extension frame. The telescopic cylinder I is connected to a push-pull frame. A wedge-shaped push block is arranged on the push-pull frame. A wedge-shaped block is arranged on the plugging post I corresponding to the wedge-shaped push block. Roller shafts are evenly arranged on the wedge-shaped surface of the wedge-shaped block.

[0009] As a further solution of the present invention: An annular groove and a resistance groove are arranged on the lifting frame. A support ball and an electrical contact block are arranged at the bottom of the extension frame. The support ball is slidably installed between the annular groove. The electrical contact block is electrically connected to the resistance groove.

[0010] As a further solution of the present invention: An installation hole is arranged on the lower side of the sampling hole. A return spring is arranged in the installation hole. The return spring is connected to a mating bead. Potential holes are evenly arranged on the edge of the lifting frame. When the lifting frame reaches the position of the installation hole, the mating bead cooperates with the potential holes, and the motor III stops driving the screw to rotate.

[0011] As a further solution of the present invention: Damping protrusions are evenly arranged on the inner side of the sampling spoon. A relief groove is arranged on the edge of the sampling spoon. A bending frame is arranged on the vertical plate. A scraping plate is connected to the end of the bending frame. When the sampling spoon is retracted horizontally upwards, the bottom end of the scraping plate is flush with the upper surface of the sampling spoon.

[0012] As a further solution of the present invention: An internal gear ring is arranged on the top of the closed cylinder. A gear I is rotatably installed on the top of the sampling cylinder. The gear I is connected to a motor I. The gear I meshes with the internal gear ring. An annular clamping groove is arranged on the top of the sampling cylinder. A mating ring is arranged on the closed cylinder corresponding to the annular clamping groove. The mating ring and the annular clamping groove cooperate with each other.

[0013] As a further scheme of the present invention: it also includes a surface cleaning mechanism, the surface cleaning mechanism includes a fixed plate and a lifting plate arranged on the connecting column, the fixed plate and the connecting column are fixedly connected, a second motor is arranged on the fixed plate, the second motor is connected to a second gear, the lifting plate and the connecting column are sleeved, a matching gear is coaxially fixedly arranged on the lifting plate, a supporting spring is arranged between the upper surface of the matching gear and the fixed plate, when the lifting plate is raised, the matching gear and the second gear are meshed with each other, an extension plate is arranged on the edge of the lifting plate, a second plug-in column is plugged into the extension plate, a locking hole is arranged on the second plug-in column, a locking telescopic column is fixedly installed on the extension plate, a horizontal frame is arranged at the bottom of the second plug-in column, the horizontal frame points to the installation axis of the sampling cylinder, a rotating column is elastically plugged into the horizontal frame, a contact wheel is rotatably installed on the end of the rotating column, a cleaning frame is arranged at the end of the horizontal frame away from the rotating column, and a scraper is evenly arranged on the surface of the cleaning frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The sampling tube is connected to the connecting column through a truncated cone connecting frame. When in use, the number of connecting columns can be adjusted according to the water depth to send the sampling tube to the underwater mud area. A closing tube is set on the outside of the sampling tube to seal the sampling hole on the outer wall of the sampling tube to prevent water from entering the sampling tube when it is placed on the bottom of the water or taken out of the water after sampling, causing the bottom mud sample to be mixed. When the sampling tube and the closing tube are inserted into the bottom mud as a whole with the connecting column pressed down, the mud can form a good sealing effect with the closing tube to prevent water from entering the sampling tube through the sampling hole when sampling the bottom mud. When the sampling mechanism rotates to point to the sampling hole during sampling, the sampling hole part on the outer closing tube rotates synchronously to open the sampling hole, thereby facilitating the sampling mechanism to pass through the sampling hole to sample the bottom mud;

[0016] (2) After completing a sediment sampling, the lifting frame is lifted by the motor 3 and the screw rod, and the power motor controls the sleeve gear to rotate, thereby driving the extension frame and the sampling spoon to rotate to the next sampling hole. The sampling spoon is extended out of the sampling hole by the telescopic cylinder 2, and the sampling spoon at the end is rotated by the rotary motor to realize the digging and sampling of the outer sediment. After the sampling is completed, the sampling spoon is retracted into the sampling tube, and the sampling spoon is controlled downward by the rotary motor. The telescopic cylinder 1 is controlled to push the push-pull frame outward, so that the wedge-shaped push block squeezes the wedge-shaped block on the plug-in column 1, and then the plug-in column 1 rises upward. At this time, the receiving spoon is aligned with the sampling spoon, and the sampling spoon is controlled to rotate around the outer side of the receiving spoon by the rotary motor. The sediment sample on the inside of the sampling spoon is received by the receiving spoon. After the sampling is completed, the push-pull frame is controlled to be retracted, and the plug-in column 1 carries the receiving spoon back to the initial height. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 Schematic diagram of the socket structure of the sampling cylinder and the sealing cylinder in the present invention.

[0019] Figure 3 Schematic diagram of the outer structure of the sampling cylinder in the present invention.

[0020] Figure 4 Schematic diagram of the internal structure of the sampling cylinder in the present invention.

[0021] Figure 5 Schematic diagram of the connection between the top of the sampling cylinder and the sealing cylinder in the present invention.

[0022] Figure 6 Schematic diagram of the combined structure of the lifting and receiving mechanism and the sampling mechanism with the sampling cylinder in the present invention.

[0023] Figure 7 Schematic diagram of the installation of the mating beads in the present invention.

[0024] Figure 8 Schematic diagram of the structure of the lifting and receiving mechanism in the present invention.

[0025] Figure 9 Schematic diagram of the bottom structure of the lifting frame in the present invention.

[0026] Figure 10 Schematic diagram of the structure of the sampling mechanism in the present invention.

[0027] Figure 11 Schematic diagram of the structure of the sampling spoon in the present invention.

[0028] Figure 12 Schematic diagram of the structure of the surface cleaning mechanism in the present invention.

[0029] Figure 13 Schematic diagram of the position of the locking hole in the present invention.

[0030] Figure 14 Schematic diagram of the installation of the cleaning frame in the present invention.

[0031] In the figure: 1, connecting column; 10, handle; 11, frustum connecting frame; 2, sampling cylinder; 20, sampling hole; 200, mating bead; 201, return spring; 21, annular clamping groove; 22, vertical mating groove; 3, sealing cylinder; 30, relief groove; 31, internal gear ring; 32, mating ring; 33, motor I; 34, gear I; 4, surface cleaning mechanism; 40, fixed disk; 41, motor II; 42, gear II; 43, lifting disk; 44, mating gear; 45, support spring; 46, extension plate; 47, plugging column II; 470, locking hole; 471, rotating column; 472, contact wheel; 473, cleaning frame; 474, scraper; 475, horizontal frame; 48, locking telescopic column; 5, plugging cone; 6, lifting frame; 60, screw; 61, motor III; 62, mating block; 63, potential hole; 64, receiving spoon; 65, plugging column I; 66, tension spring; 67, wedge block; 7, sampling mechanism; 70, socketed tooth; 71, socketed disk; 72, extension frame; 73, driving gear; 74, telescopic cylinder I; 75, pushing and pulling frame; 750, wedge-shaped pushing block; 76, vertical plate; 77, rotating motor; 78, telescopic cylinder II; 79, sampling spoon; 790, damping protrusion; 791, relief groove; 710, bending frame; 711, scraper; 712, annular groove; 713, support ball; 714, resistance groove; 715, electrical contact block. Detailed implementation mode

[0032] The technical solution of the present invention will be further described in detail below in conjunction with the specific implementation mode.

[0033] As Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in the figure, a bottom sediment sampling device for land quality investigation includes multiple connecting columns 1, which are connected by threads. A handle 10 is provided at the end of the connecting column 1, and a frustum connecting frame 11 is connected to the other end of the connecting column 1. A sampling cylinder 2 is fixedly connected inside the frustum connecting frame 11. A sealing cylinder 3 is hermetically sleeved outside the sampling cylinder 2. A plugging cone 5 is fixedly installed at the bottom of the sampling cylinder 2. The sampling cylinder 2 and the sealing cylinder 3 are rotatably installed. A plurality of sampling holes 20 are spirally distributed on the side wall of the sampling cylinder 2. A lifting and receiving mechanism is arranged inside the sampling cylinder 2, and a sampling mechanism 7 is arranged on the lifting and receiving mechanism. A vertical relief groove 30 is arranged on the side wall of the sealing cylinder 3. The sampling mechanism 7 and the sealing cylinder 3 are synchronously rotatably installed. The sampling mechanism 7 is aligned with the relief groove 30 on the sealing cylinder 3. When the sampling mechanism 7 is aligned with the sampling hole 20, it passes through the sampling hole 20 and the relief groove 30 to perform bottom sediment sampling.

[0034] Specifically, the sampling tube 2 is connected to the connecting column 1 through a truncated cone connecting frame 11. When in use, the number of connecting columns 1 can be adjusted according to the water depth to deliver the sampling tube 2 to the underwater mud area. A closing tube 3 is arranged on the outside of the sampling tube 2 to block the sampling hole 20 on the outer wall of the sampling tube 2 to prevent water from entering the sampling tube 2 when it is put into the bottom of the water or taken out of the water surface after sampling, resulting in mixing of the bottom mud samples. When the sampling tube 2 and the closing tube 3 are inserted into the bottom mud as a whole with the connection column 1 pressed down, the mud can form a good sealing effect with the closing tube 3 to prevent water from entering the sampling tube 2 through the sampling hole 20 when sampling the bottom mud. When the sampling mechanism 7 rotates to point to the sampling hole 20 during sampling, the position of the yield groove 30 on the outer closing tube 3 rotates synchronously with the sampling hole 20 to open the sampling hole 20, thereby facilitating the sampling mechanism 7 to pass through the sampling hole 20 for bottom mud sampling.

[0035] Further, such as Figure 5 , Figure 6 , Figure 8 , Figure 9 As shown, the lifting and receiving mechanism includes a lifting frame 6 arranged on the inner side of the sampling cylinder 2, and vertical matching grooves 22 are evenly arranged on the inner side of the sampling cylinder 2. Matching blocks 62 are arranged on the edges of the lifting frame 6 corresponding to the vertical matching grooves 22. The lifting frame 6 is slidably installed between the matching blocks 62 and the vertical matching grooves 22. A motor 3 61 is arranged at the top center of the sampling cylinder 2, and the motor 3 61 is connected to a screw 60. The screw 60 is threadedly connected to the lifting frame 6. The lifting frame 6 is arranged with plug-in columns 65 at intervals corresponding to the arrangement angle of the sampling holes 20. A tensioning spring 66 is arranged between the plug-in column 65 and the lifting frame 6. A receiving spoon 64 is connected to the upper end of the plug-in column 65, and the receiving spoon 64 is arranged to point to the central axis of the lifting frame 6.

[0036] Specifically, the sampling holes 20 are arranged evenly spaced along the spiral line. After completing a single sampling, the lifting frame 6 is raised by controlling the motor 3 61 and the screw 60, and at the same time, the sampling mechanism 7 is driven to rotate on the lifting frame 6 to the next sampling hole 20. After the sampling mechanism 7 passes through the sampling hole 20 to complete the bottom mud sampling, it is retracted into the interior of the sampling tube 2, and the sampled sample is received by the receiving spoon 64.

[0037] Further, such as Figure 10As shown, the sampling mechanism 7 includes a socket tooth 70 which is coaxially rotatably installed with the lifting frame 6, a socket disk 71 is fixedly arranged on the upper side of the socket tooth 70, a driving gear 73 is rotatably installed on the lifting frame 6, the driving gear 73 is connected to a power motor, the driving gear 73 and the socket tooth 70 are meshed with each other, an extension frame 72 is connected to the socket disk 71, a vertical plate 76 is arranged on the extension frame 72, a rotating motor 77 is arranged on the vertical plate 76, a telescopic cylinder 2 78 is connected to the output shaft of the rotating motor 77, the telescopic cylinder 2 78 is connected to a sampling spoon 79, a telescopic cylinder 1 74 is arranged at the bottom of the extension frame 72, the telescopic cylinder 1 74 is connected to a push-pull frame 75, a wedge-shaped push block 750 is arranged on the push-pull frame 75, a wedge-shaped block 67 is arranged on the plug-in column 1 65 corresponding to the wedge-shaped push block 750, and rollers are evenly arranged on the wedge-shaped surface of the wedge-shaped block 67.

[0038] Specifically, after completing a sediment sampling, the lifting frame 6 is lifted along with the motor 3 61 and the screw 60, and at the same time, the power motor controls the sleeve gear 70 to rotate, thereby driving the extension frame 72 and the sampling spoon 79 to rotate to the next sampling hole 20, and the sampling spoon 79 is extended out of the sampling hole 20 by the telescopic cylinder 2 78, and the sampling spoon 79 at the end is controlled to rotate by the rotary motor 77, so as to realize the digging and sampling of the outer sediment, and the sampling spoon 79 that completes the sampling is retracted into the sampling tube 2, and the sampling spoon 79 is rotated. The motor 77 controls the sampling spoon 79 to move downward, controls the telescopic cylinder 74 to push the push-pull frame 75 outward, and causes the wedge-shaped push block 750 to squeeze the wedge-shaped block 67 on the plug-in column 65, thereby causing the plug-in column 65 to rise upward. At this time, the receiving spoon 64 is aligned with the sampling spoon 79, and the sampling spoon 79 is controlled to rotate around the outside of the receiving spoon 64 in combination with the rotating motor 77. The bottom mud sample on the inside of the sampling spoon 79 is received by the receiving spoon 64. After the sampling is completed, the push-pull frame 75 is controlled to be retracted, and the plug-in column 65 carries the receiving spoon 64 back to the initial height.

[0039] Further, such as Figure 10 As shown, the lifting frame 6 is provided with an annular groove 712 and a resistor groove 714 , and the bottom of the extension frame 72 is provided with a supporting ball 713 and an electrical contact block 715 , the supporting ball 713 is slidably installed with the annular groove 712 , and the electrical contact block 715 is electrically connected with the resistor groove 714 .

[0040] Specifically, the extension frame 72 and the telescopic cylinder 1 74, the telescopic cylinder 2 78 and other components on the extension frame 72 are supported by providing an annular groove 712 and a supporting ball 713, so as to ensure that the sampling spoon 79 connected at the end is installed horizontally. At the same time, the resistor groove 714 and the electrical contact block 715 are provided to ensure that the sealing cylinder 3 outside the sampling cylinder 2 can rotate synchronously when the sampling mechanism 7 rotates to the next sampling hole 20, so that the giving way groove 30 stays at the next sampling hole 20, ensuring accurate sampling.

[0041] Further, such as Figure 6 , Figure 7 As shown, a mounting hole is provided at the lower side of the sampling hole 20, a return spring 201 is provided in the mounting hole, the return spring 201 is connected with a matching bead 200, and potential holes 63 are evenly provided at the edge of the lifting frame 6. When the lifting frame 6 reaches the position of the mounting hole, the matching bead 200 and the potential hole 63 cooperate with each other, and the motor three 61 stops driving the screw 60 to rotate.

[0042] Specifically, in order to ensure that the lifting frame 6 can accurately stay at the lower side of each sampling hole 20 for sampling, a mounting hole is set at the bottom of the sampling hole 20. When the lifting frame 6 is raised, the potential hole 63 on the side cooperates with the matching bead 200 in the mounting hole, and the potential in the potential hole 63 is reversed. At this time, the motor three 61 is controlled to stop driving, so that the lifting frame 6 stops moving, until the sampling and receiving operations are completed, the motor three 61 is controlled to start again, and the sampling operation of the next step is repeated.

[0043] Further, such as Figure 10 , Figure 11 As shown, damping protrusions 790 are evenly arranged on the inner side of the sampling spoon 79, a yield groove 791 is arranged on the edge of the sampling spoon 79, a bending frame 710 is arranged on the vertical plate 76, and a scraper 711 is connected to the end of the bending frame 710. When the sampling spoon 79 is retracted horizontally upward, the bottom end of the scraper 711 is flush with the upper surface of the sampling spoon 79.

[0044] Specifically, in order to ensure that the bottom mud in the downward sampling spoon 79 will not separate from the sampling spoon 79, a damping protrusion 790 is provided in the sampling spoon 79 to enhance the adhesion between the bottom mud sample and the sampling spoon 79, thereby ensuring the reliability of sampling. At the same time, when the sampling spoon 79 is retracted to the top of the receiving spoon 64, the sampling spoon 79 is controlled by the rotating motor 77 to flip downward. Even if the bottom mud in the sampling spoon 79 is not sufficiently adhered to the inner wall and separates from the sampling spoon 79, the bottom mud sample can still be received by the receiving spoon 64 directly below, thereby ensuring the reliability of sampling.

[0045] Further, such as Figure 5 As shown, an inner gear ring 31 is provided at the top of the closing cylinder 3, a gear 34 is rotatably installed at the top of the sampling cylinder 2, the gear 34 is connected to a motor 33, the gear 34 and the inner gear ring 31 are meshed with each other, an annular clamping groove 21 is provided at the top of the sampling cylinder 2, and a matching ring 32 is provided at the position of the closing cylinder 3 corresponding to the annular clamping groove 21, and the matching ring 32 and the annular clamping groove 21 cooperate with each other.

[0046] Specifically, the closing cylinder 3 is rotatably installed through the inner gear ring 31, gear 1 34 and motor 1 33. When the sampling mechanism 7 inside the sampling cylinder 2 rotates around the central axis of the lifting frame 6, the motor 1 33 synchronously controls the closing cylinder 3 to rotate around the outer wall of the sampling cylinder 2, so that the make way groove 30 on the closing cylinder 3 rotates to the sampling hole 20 correspondingly, which is convenient for sampling operation. At the same time, the sampling hole 20 is blocked to prevent bottom mud from entering the sampling cylinder 2, thereby ensuring the reliability of sampling.

[0047] Further, such as Figure 12 , Figure 13 , Figure 14 As shown, it also includes a surface cleaning mechanism 4, which includes a fixed disk 40 and a lifting disk 43 arranged on the connecting column 1. The fixed disk 40 is fixedly connected to the connecting column 1. A motor 2 41 is arranged on the fixed disk 40, and a gear 2 42 is connected to the motor 2 41. The lifting disk 43 is sleeved with the connecting column 1. A matching gear 44 is coaxially fixedly arranged on the lifting disk 43. A supporting spring 45 is arranged between the upper surface of the matching gear 44 and the fixed disk 40. When the lifting disk 43 is raised, the matching gear 44 and the gear 2 42 are meshed with each other, and the lifting disk 43 is An extension plate 46 is provided at the edge, a plug-in column 47 is plugged into the extension plate 46, a locking hole 470 is provided on the plug-in column 47, a locking telescopic column 48 is fixedly installed on the extension plate 46, a horizontal frame 475 is provided at the bottom of the plug-in column 47, the horizontal frame 475 points to the installation axis of the sampling tube 2, a rotating column 471 is elastically plugged into the horizontal frame 475, a contact wheel 472 is rotatably installed at the end of the rotating column 471, a cleaning frame 473 is provided at the end of the horizontal frame 475 away from the rotating column 471, and a scraper 474 is evenly arranged on the surface of the cleaning frame 473.

[0048] Specifically, when the connection column 1 carrying the sampling tube 2 falls to the bottom of the water, the sampling tube 2 continues to fall through the plug cone 5, and the plug column 2 47 is locked by the locking telescopic column 48, and the cleaning rack 473 at the bottom is blocked, thereby driving the lifting plate 43 to approach the fixed plate 40 along the connection column 1, and then the matching gear 44 and the gear 2 42 are meshed with each other, thereby driving the lifting plate 43 and the plug column 2 47 and the cleaning rack 473 to rotate around the central axis of the sampling tube 2, and the cleaning operation of the sampling part is realized. After the cleaning is completed, the locking telescopic column 48 releases the lock of the plug column 2 47, and when the sampling tube 2 continues to be inserted into the bottom mud, the plug column 2 47 carrying the cleaning rack 473 at the bottom will continue to rise along the extension plate 46, thereby avoiding blocking the insertion of the sampling tube 2 into the bottom mud, and ensuring the smooth progress of the subsequent bottom mud sampling.

[0049] The working principle of the embodiment of the present invention is:

[0050] like Figures 1 - 14As shown, the sampling tube 2 is connected to the connecting column 1 through a truncated cone connecting frame 11. When in use, the number of connecting columns 1 can be adjusted according to the water depth to deliver the sampling tube 2 to the underwater mud area. A closing tube 3 is arranged on the outside of the sampling tube 2 to block the sampling hole 20 on the outer wall of the sampling tube 2 to prevent water from entering the sampling tube 2 when it is put into the bottom of the water or taken out of the water surface after sampling, resulting in mixing of the bottom mud samples. When the sampling tube 2 and the closing tube 3 are inserted into the bottom mud as a whole along with the pressing connecting column 1, the mud can form a good sealing effect with the closing tube 3 to prevent water from entering the sampling tube 2 through the sampling hole 20 when sampling the bottom mud. When the sampling mechanism 7 rotates to point to the sampling hole 20 during sampling, the position of the yield groove 30 on the outer closing tube 3 rotates synchronously with the sampling hole 20 to open the sampling hole 20, thereby facilitating the sampling mechanism 7 to pass through the sampling hole 20 for bottom mud sampling. The sampling holes 20 are evenly spaced along the spiral line. After completing a single sampling, the lifting frame 6 is raised by the motor three 61 and the screw 60, and the sampling mechanism 7 is driven to rotate on the lifting frame 6 to the next sampling hole 20. After the sampling mechanism 7 passes through the sampling hole 20 to complete the bottom mud sampling, it is retracted into the interior of the sampling tube 2, and the sample is received by the receiving spoon 64. After completing a bottom mud sampling, the lifting frame 6 is lifted by the motor three 61 and the screw 60, and the socket teeth 70 are controlled to rotate in combination with the power motor, thereby driving the extension frame 72 and the sampling spoon 79 to rotate to the next sampling hole 20. The sampling spoon 79 is controlled to extend out of the sampling hole 20 by the telescopic cylinder two 78, and the sampling spoon 79 at the end is controlled to rotate in combination with the rotating motor 77, so as to realize the digging and sampling of the bottom mud on the outside. The sampling spoon 79 that completes the sampling is retracted into the sampling tube 2, and the rotating motor is used to rotate. 77 controls the sampling spoon 79 downward, controls the telescopic cylinder 1 74 to push the push-pull frame 75 outward, and makes the wedge-shaped push block 750 squeeze the wedge-shaped block 67 on the plug-in column 1 65, thereby making the plug-in column 1 65 rise upward. At this time, the receiving spoon 64 is aligned with the sampling spoon 79, and the sampling spoon 79 is controlled to rotate around the outside of the receiving spoon 64 in combination with the rotating motor 77. The bottom mud sample inside the sampling spoon 79 is received by the receiving spoon 64. After the sampling is completed, the push-pull frame 75 is controlled to be retracted, and the plug-in column 1 65 carries the receiving spoon 64 back to the initial height. The annular groove 712 and the supporting ball 713 are provided to support the extension frame 72 and the telescopic cylinder 1 74, the telescopic cylinder 2 78 and other components on the extension frame 72, so as to ensure that the sampling spoon 79 connected at the end is kept horizontally installed. The resistor slot 714 and the electrical contact block 715 are provided to ensure that the sealing tube 3 outside the sampling tube 2 can rotate synchronously when the sampling mechanism 7 rotates to the next sampling hole 20, so that the giving way slot 30 stays at the next sampling hole 20 to ensure accurate sampling.To ensure that the lifting frame 6 can accurately stop below each sampling hole 20 for sampling, mounting holes are provided at the bottom of the sampling holes 20. When the lifting frame 6 rises, the potential holes 63 on the side are engaged with the mating beads 200 in the mounting holes, and the potential in the potential holes 63 flips. At this time, the control motor three 61 stops driving, so that the lifting frame 6 stops moving. Until after the sampling and receiving operations are completed, the control motor three 61 is restarted to repeat the sampling operation of the next step. To ensure that the sediment in the downward sampling spoon 79 does not detach from the sampling spoon 79, damping protrusions 790 are provided in the sampling spoon 79 to enhance the adhesion between the sediment sample and the sampling spoon 79 and ensure the reliability of sampling. At the same time, when the sampling spoon 79 is retracted directly above the receiving spoon 64, the sampling spoon 79 is controlled by the rotating motor 77 to flip downward. Even if the adhesion between the sediment in the sampling spoon 79 and the inner wall is insufficient and the sediment detaches from the sampling spoon 79, the sediment sample can be received by the receiving spoon 64 directly below, thus ensuring the sampling reliability. The closed cylinder 3 is rotationally mounted through the internal gear ring 31, the first gear 34, and the first motor 33. When the sampling mechanism 7 inside the sampling cylinder 2 rotates around the central axis of the lifting frame 6, the first motor 33 synchronously controls the closed cylinder 3 to rotate around the outer wall of the sampling cylinder 2, so that the relief groove 30 on the closed cylinder 3 is correspondingly rotated to the position of the sampling hole 20, facilitating the sampling operation. At the same time, the other sampling holes 20 are blocked to prevent sediment from entering the sampling cylinder 2 and ensure the sampling reliability. When the connecting column 1 carries the sampling cylinder 2 and descends to the bottom of the water, the sampling cylinder 2 continues to descend through the plugging cone 5. Due to the locking effect of the locking telescopic column 48 on the second plugging column 47, the cleaning frame 473 at the bottom is blocked, which drives the lifting disk 43 to approach the fixed disk 40 along the connecting column 1, and further enables the mating gear 44 to mesh with the second gear 42, thereby driving the lifting disk 43, the second plugging column 47, and the cleaning frame 473 to rotate around the central axis of the sampling cylinder 2 to realize the cleaning operation of the sampling part. After the cleaning is completed, the locking telescopic column 48 releases the locking of the second plugging column 47. When the sampling cylinder 2 continues to be inserted into the sediment, the second plugging column 47 carrying the cleaning frame 473 at the bottom will continue to rise along the extension plate 46, thus preventing the insertion of the sampling cylinder 2 into the sediment and ensuring the smooth progress of subsequent sediment sampling.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Any reference signs in the claims shall not be regarded as limiting the claimed claims.

[0052] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sediment sampling device for land quality survey, comprising a plurality of connecting columns (1), wherein the connecting columns (1) are connected to each other by threads, a handle (10) is provided at the end of the connecting column (1), the other end of the connecting column (1) is connected to a truncated cone connecting frame (11), a sampling cylinder (2) is fixedly connected to the inner side of the truncated cone connecting frame (11), a sealing cylinder (3) is sealedly sleeved on the outer side of the sampling cylinder (2), and a plug-in cone (5) is sealed and installed at the bottom of the sampling cylinder (2), characterized in that: The sampling cylinder (2) is rotatably mounted on the closed cylinder (3); a plurality of sampling holes (20) are spirally arranged on the side wall of the sampling cylinder (2); a lifting receiving mechanism is arranged inside the sampling cylinder (2); a sampling mechanism (7) is arranged on the lifting receiving mechanism; a vertical clearance groove (30) is arranged on the side wall of the closed cylinder (3); the sampling mechanism (7) is synchronously rotatably mounted on the closed cylinder (3); the sampling mechanism (7) is aligned with the clearance groove (30) on the closed cylinder (3); when the sampling mechanism (7) is aligned with the sampling hole (20), the sampling mechanism (7) passes through the sampling hole (20) and the clearance groove (30) to perform sediment sampling; The lifting receiving mechanism comprises a lifting frame (6) arranged inside the sampling cylinder (2), the inside of the sampling cylinder (2) is evenly provided with vertical matching grooves (22), the edge of the lifting frame (6) is provided with matching blocks (62) corresponding to the vertical matching grooves (22), the lifting frame (6) is slidably installed between the matching blocks (62) and the vertical matching grooves (22), a motor three (61) is provided at the top center of the sampling cylinder (2), the motor three (61) is connected with a screw rod (60), the screw rod (60) and the lifting frame (6) are threadedly connected, the lifting frame (6) is provided with plug-in columns (65) at intervals corresponding to the arrangement angle of the sampling holes (20) in the circumference, a tensioning spring (66) is provided between the plug-in columns (65) and the lifting frame (6), the upper end of the plug-in column (65) is connected with a receiving spoon (64), and the receiving spoon (64) is arranged to point to the central axis of the lifting frame (6); The sampling mechanism (7) comprises a sleeve tooth (70) coaxially rotatably mounted with the lifting frame (6); a sleeve disc (71) is fixedly arranged on the upper side of the sleeve tooth (70); a driving gear (73) is rotatably mounted on the lifting frame (6); the driving gear (73) is connected to a power motor; the driving gear (73) and the sleeve tooth (70) are meshed with each other; an extension frame (72) is connected to the sleeve disc (71); a vertical plate (76) is arranged on the extension frame (72); and a rotating motor is arranged on the vertical plate (76). (77), the output shaft of the rotating motor (77) is connected to a telescopic cylinder 2 (78), the telescopic cylinder 2 (78) is connected to a sampling spoon (79), a telescopic cylinder 1 (74) is arranged at the bottom of the extension frame (72), the telescopic cylinder 1 (74) is connected to a push-pull frame (75), a wedge-shaped push block (750) is arranged on the push-pull frame (75), a wedge-shaped block (67) is arranged on the plug-in column 1 (65) corresponding to the wedge-shaped push block (750), and rollers are evenly arranged on the wedge-shaped surface of the wedge-shaped block (67).

2. A sediment sampling device for land quality survey according to claim 1, characterized in that: The lifting frame (6) is provided with an annular groove (712) and a resistor groove (714), and the bottom of the extension frame (72) is provided with a supporting ball (713) and an electrical contact block (715), the supporting ball (713) and the annular groove (712) are slidably mounted, and the electrical contact block (715) and the resistor groove (714) are electrically connected.

3. The sediment sampling device for land quality survey according to claim 1, characterized in that: A mounting hole is provided at the lower side of the sampling hole (20), a return spring (201) is provided in the mounting hole, the return spring (201) is connected to a matching bead (200), and potential holes (63) are evenly provided at the edge of the lifting frame (6). When the lifting frame (6) reaches the position of the mounting hole, the matching bead (200) and the potential hole (63) cooperate with each other, and the motor three (61) stops driving the screw rod (60) to rotate.

4. The sediment sampling device for land quality survey according to claim 1, characterized in that: The inner side of the sampling spoon (79) is evenly provided with damping protrusions (790), the edge of the sampling spoon (79) is provided with a clearance groove (791), a bending frame (710) is provided on the vertical plate (76), and the end of the bending frame (710) is connected to a scraper (711), and when the sampling spoon (79) is retracted horizontally upward, the bottom end of the scraper (711) is flush with the upper surface of the sampling spoon (79).

5. The sediment sampling device for land quality survey according to claim 1, characterized in that: An inner gear ring (31) is arranged at the top of the closing cylinder (3), a gear 1 (34) is rotatably mounted on the top of the sampling cylinder (2), the gear 1 (34) is connected to a motor 1 (33), the gear 1 (34) and the inner gear ring (31) are meshed with each other, an annular clamping groove (21) is arranged at the top of the sampling cylinder (2), a matching ring (32) is arranged at a position of the closing cylinder (3) corresponding to the annular clamping groove (21), and the matching ring (32) and the annular clamping groove (21) are matched with each other.

6. The sediment sampling device for land quality survey according to claim 1, characterized in that: The surface cleaning mechanism (4) further comprises a surface cleaning mechanism (4), the surface cleaning mechanism (4) comprising a fixed disk (40) and a lifting disk (43) arranged on the connecting column (1), the fixed disk (40) being fixedly connected to the connecting column (1), a second motor (41) being arranged on the fixed disk (40), the second motor (41) being connected to a second gear (42), the lifting disk (43) being sleeved with the connecting column (1), a mating gear (44) being coaxially fixedly arranged on the lifting disk (43), a supporting spring (45) being arranged between the upper surface of the mating gear (44) and the fixed disk (40), and when the lifting disk (43) is raised, the mating gear (44) and the second gear (42) are meshed with each other, and the lifting disk (43) is supported by the fixing plate (40). ) is provided with an extension plate (46) at the edge thereof, a plug-in column (47) is plugged into the extension plate (46), a locking hole (470) is provided on the plug-in column (47), a locking telescopic column (48) is fixedly mounted on the extension plate (46), a horizontal frame (475) is provided at the bottom of the plug-in column (47), the horizontal frame (475) points to the installation axis of the sampling cylinder (2), a rotating column (471) is elastically plugged into the horizontal frame (475), a contact wheel (472) is rotatably mounted on the end of the rotating column (471), a cleaning frame (473) is provided at one end of the horizontal frame (475) away from the rotating column (471), and a scraper (474) is evenly arranged on the surface of the cleaning frame (473).

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