A multi-point sampling collector for deep water reservoir silt

Abstract

The present application relates to the technical field of soil sampling equipment, and specifically discloses a multi-point sampling collector for deep-water reservoir silt, which comprises a top ring, the top ring is hexagonal, an elastic sliding connection is formed between the upper surface of the top ring and a connecting rod, the bottom of the connecting rod is fixedly connected with a bottom ring, and the bottom of the bottom ring is fixedly connected with a ground-touching ring through a connecting rod. When sampling is completed, the threaded rod is driven to move upwards, the sleeve is reversed, the ground-touching ring still adheres to the reservoir soil due to the elastic force, the top ring drives the sampling tube to move upwards, and finally the bottom of the sampling tube re-enters the bottom ring gradually, at this time, the sleeve still drives the lower connecting frame to rotate as the threaded rod continues to move upwards, at this time, the lower connecting frame drives the closing ring to reverse, gradually closing the bottom of the sampling tube, and thus the bottom of the sampling tube is closed after sampling is completed, thereby avoiding the problem that the bottom of the sampling tube leaks due to contact with water, resulting in loss of soil samples.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil sampling equipment, specifically a multi-point sampling collector for deep water reservoir silt. BACKGROUND

[0002] In the environmental monitoring and management of deep water reservoirs, a multi-point sampling collector for silt is a core device for obtaining silt samples. Its main function is to collect silt samples at multiple points on the bottom of the reservoir through mechanical structure design, providing data support for water quality analysis, ecological assessment, etc. The device achieves efficient and accurate collection of silt in deep water areas through hydraulic drive and multi-point synchronous sampling technology, and is widely used in water conservancy engineering, environmental protection and other fields, which is of great significance to the safety and ecological balance of reservoirs.

[0003] Traditional deep water silt sampling equipment has significant shortcomings. In terms of sampling sealing, traditional devices lack effective automatic sealing mechanisms, and the sampling tube is prone to soil leakage due to water flow impact during lifting, affecting sample integrity. Single-point sampling design makes the device need to be frequently adjusted when encountering obstacles such as stones, resulting in low sampling efficiency, and single-point data is difficult to fully reflect the distribution characteristics of the reservoir bottom silt. In terms of structural stability, traditional equipment often uses rigid connections and lacks elastic buffer protection, so the sampling tube is prone to deformation or damage due to excessive resistance, shortening the service life of the equipment. In addition, traditional devices rely on manual operation and are difficult to adapt to complex underwater environments, limiting sampling depth and accuracy, and cannot meet the needs of modern reservoir monitoring for automation and efficiency. These problems restrict the application efficiency of traditional sampling equipment, and it is urgent to improve its reliability and adaptability through intelligent and adaptive design. SUMMARY

[0004] (I) Technical problems solved

[0005] The present application provides a multi-point sampling collector for deep water reservoir silt, which solves the problems mentioned in the background.

[0006] (II) Technical solutions

[0007] In order to achieve the above object, the present application is realized by the following technical scheme: a multi-point sampling collector for deep water reservoir silt, comprising a top ring, the top ring is hexagonal, an upper surface of the top ring is connected with a connecting rod through elastic sliding, a bottom of the connecting rod is fixedly connected with a bottom ring, a bottom of the bottom ring is fixedly connected with a ground-touching ring through a connecting rod, further comprising: a sampling mechanism movably installed on the top ring and the bottom ring; an auxiliary mechanism fixedly installed on the top ring; wherein the sampling mechanism comprises a sampling pipe, upper and lower ends of the sampling pipe are slidably connected with the upper surfaces of the top ring and the bottom ring respectively, six sampling pipes are fixedly arranged along the central axis of the top ring and the bottom ring at a fixed interval, outer surfaces of both sides of the sampling pipe are fixedly connected with a clamping strip, and the clamping strip is arranged in a corrugated shape.

[0008] According to one embodiment of the present application, an inner surface of the top ring is fixedly connected with an upper connecting frame, an inner surface of the upper connecting frame is rotationally connected with a sleeve, an inner surface of the sleeve is threadedly connected with a threaded rod, a top outer surface of the threaded rod is fixedly connected with a support rod, and a bottom of the support rod is fixedly connected with an upper surface of the upper connecting frame.

[0009] According to one embodiment of the present application, an outer surface of the bottom ring is slidably connected with a closing ring, a cross section of the closing ring is arranged in an L shape, a bottom surface of the closing ring is provided with a staggered slot, and the staggered slot is initially staggered with the through hole on the bottom ring.

[0010] According to one embodiment of the present application, an inner side surface of the closing ring is provided with a ring groove, a friction block is frictionally and slidably connected in the ring groove, an inner side surface of the friction block is fixedly connected with a lower connecting frame, a middle upper surface of the lower connecting frame is fixedly connected with a bottom of the sleeve, an inner surface of the closing ring is fixedly connected with a protrusion, and a side surface of the bottom ring is provided with a limiting slot, and the protrusion is slidably connected in the limiting slot.

[0011] According to one embodiment of the present application, the auxiliary mechanism comprises an extrusion rod, an inside of the threaded rod is hollow, the extrusion rod is slidably inserted in the inner surface of the threaded rod, a bottom of the extrusion rod and a bottom of the threaded rod are provided with a cavity, an outer surface of the bottom of the extrusion rod is fixedly connected with an elastic cover, a top of the elastic cover is fixedly connected with an inner surface of the bottom of the threaded rod, and the elastic cover is arranged in a horn shape.

[0012] According to one embodiment of the present application, an inside of the extrusion rod is hollow, a top outer surface of the extrusion rod is fixedly sleeved with a sleeve ring, an outer surface of the sleeve ring is fixedly connected with a hose, one end of the hose away from the sleeve ring is fixedly connected with an upper surface of the top ring, and a top of the hose is in communication with the internal cavity of the extrusion rod.

[0013] According to one embodiment of the present application, the inner part of the top ring is provided with sliding grooves, the sliding grooves are arranged in pairs as a group, the sliding grooves in the same group are symmetrically arranged on both sides of the sampling tube, the inner part of the sliding groove is fixedly connected with an expansion bag, and one end of the expansion bag close to the sampling tube is fixedly connected with a sliding block.

[0014] According to one embodiment of the present application, the inner part of the top ring is provided with a communication groove, the two ends of the communication groove are communicated with the two expansion bags in the adjacent sliding grooves respectively, and the communication groove is communicated with the bottom of the hose.

[0015] According to one embodiment of the present application, one end of the sliding block away from the expansion bag is in elastic clamping contact with the clamping strip, the surface of the sliding block away from the expansion bag is not in contact with the vertical surface of the clamping strip, the two sides of one end of the sliding block close to the clamping strip are provided as inclined surfaces, and the two sides of one end of the sliding block close to the clamping strip are provided with buffer grooves. If it is necessary to collect bottom mud, the extrusion rod at the top of the collector can be connected with a hydraulic device, and the collector as a whole can be immersed in water in the reservoir and gradually lowered. With the lowering of the collector, the bottom surface of the ground contact ring finally contacts the soil at the bottom of the water. At this time, with the gradual driving of the external hydraulic device, the threaded rod starts to descend, and then drives the sleeve connected with it to start rotating, so that the sleeve drives the lower connecting frame to rotate, and the friction block starts to rotate. Because the friction block is in frictional connection with the ring groove, the rotation of the friction block will drive the closed ring to start rotating along the outer surface of the bottom ring at the beginning, and finally make the misaligned slot on the closed ring align with the slot on the bottom ring. When the alignment is completed, the limiting effect between the protrusion and the limiting groove makes the closed ring unable to continue rotating along the outer surface of the bottom ring. At this time, the friction block starts to rotate in the ring groove relative to the closed ring, and at this time, with the continuous downward movement of the threaded rod, the upper connecting frame is also driven to move downward through the support rod, and then the top ring is moved downward, so that the sampling tube on the top ring starts to gradually contact the soil at the bottom of the water through the misaligned slot and gradually enter the silt for soil sampling. Finally, six sampling tubes realize multi-point soil sampling.

[0016] (Three) beneficial effects

[0017] The present application provides a multi-point sampling collector for deep water reservoir silt. The following beneficial effects are achieved:

[0018] (I) The multi-point sampling collector of deep water reservoir silt, when the sampling is completed, the threaded rod is driven to move upward, the sleeve reverses, at this time the ground ring still adheres to the reservoir soil due to the elastic force, and the top ring drives the sampling tube to move upward, and finally the bottom of the sampling tube reenters the bottom ring step by step, at this time the sleeve still drives the lower connecting frame to rotate with the continuous upward movement of the threaded rod, at this time the lower connecting frame drives the sealing ring to reverse without the blockage of the sampling tube, and the bottom of the sampling tube is gradually sealed, thereby achieving the sealing of the bottom of the sampling tube after the sampling is completed, avoiding the problem that the bottom of the sampling tube leaks due to contact with water, resulting in the loss of soil samples.

[0019] (II) The multi-point sampling collector of deep water reservoir silt, if six sampling tubes encounter hard materials such as stones during the downward sampling process, the sampling tubes cannot continue to move downward, at this time the sampling tube that cannot continue to move downward starts to move upward relative to the top ring due to the elastic extrusion of the slide block in the top ring by the existence of the blocking strip, and the sampling tubes that are not blocked continue to move downward for sampling, thereby achieving the sampling operation of other sampling tubes when part of the sampling tubes are blocked and cannot continue to sample, avoiding the problem that the current sampling equipment cannot complete sampling when encountering hard materials such as stones and needs to be frequently adjusted, thereby greatly improving the sampling efficiency.

[0020] (III) The multi-point sampling collector for sediment in this deep-water reservoir, when the threaded rod moves downward, first drives the extrusion rod to move downward within the threaded rod, thus extruding the cavity at the bottom of the threaded rod. This extrusion rod then delivers its internal air pressure into the extrusion rod, which is then delivered through a hose to the connecting groove in the top ring. The air pressure is then fed into the expansion bladder in the sliding groove, causing the expansion bladder to push the slider closer to the sampling tube within the sliding groove. Finally, the slider is pressed against the retaining strips on both sides of the sampling tube, significantly improving the fixation of the sampling tube. Under sufficiently strong downward pressure, the sampling tube can still move relative to the top ring, protecting the sampling tube from obstructions such as rocks. This ensures the sampling tube enters the soil stably during sampling, greatly improving its operational stability. After sampling is complete, the extrusion rod and threaded rod move upward synchronously. When the extrusion rod and threaded rod reach the top simultaneously, the top ring can no longer move. At this point, the extrusion rod continues to move upward relative to the threaded rod, causing the threaded rod to... The cavity at the bottom is stretched into a negative pressure state, drawing air pressure from inside the extrusion rod. This causes the expansion bladder to contract, moving the slider into the groove and losing its fixing effect on the sampling tube. This facilitates the repositioning of the six sampling tubes for the next sampling. If a sampling tube is blocked, the locking strips on both sides of the sampling tube begin to move relative to the top ring, squeezing the slider. This causes the sliders on both sides of the blocked sampling tube to move into the groove, squeezing the expansion bladder at the top of the blocked sampling tube. This increases the air pressure in the expansion bladders on both sides of the other sampling tubes, increasing the squeezing force between the slider and the locking strips on the sampling tube. As a result, the sliders on the unblocked sampling tubes continue to approach the locking strips and engage with them. At this time, the buffer groove on the slider is squeezed, providing buffer space for the slider. This enhances the fixing effect between the remaining sampling tubes and the top ring even when some sampling tubes are blocked, thus significantly improving the working stability of the sampling tubes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the flexible hose and its connection structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the lower connecting frame and its connecting structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the top ring of the present invention;

[0025] Figure 5 This is a schematic diagram of the slider and its connection structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the closed ring structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the threaded rod of the present invention;

[0028] Figure 8 This is a schematic diagram of the buffer groove of the present invention.

[0029] In the diagram: 1. Top ring; 2. Connecting rod; 3. Bottom ring; 4. Ground contact ring; 5. Sampling mechanism; 51. Sampling tube; 52. Locking strip; 53. Upper connecting frame; 54. Sleeve; 55. Threaded rod; 56. Support rod; 57. Closing ring; 58. Misaligned groove; 59. Ring groove; 510. Friction block; 511. Lower connecting frame; 512. Protrusion; 513. Limiting groove; 6. Auxiliary mechanism; 61. Extrusion rod; 62. Elastic cover; 63. Collar; 64. Hoses; 65. Slide groove; 66. Expansion bladder; 67. Sliding block; 68. Connecting groove; 69. Buffer groove. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] First embodiment: as follows Figures 1 to 8 As shown, the present invention provides a technical solution: a multi-point sampling collector for sediment deposits in deep-water reservoirs, comprising a top ring 1, the top ring 1 being hexagonal in shape, a connecting rod 2 being elastically slidably connected through the upper surface of the top ring 1, a bottom ring 3 being fixedly connected to the bottom of the connecting rod 2, and a ground contact ring 4 being fixedly connected to the bottom of the bottom ring 3 via a connecting rod, and further comprising:

[0032] Sampling mechanism 5 is movably mounted on top ring 1 and bottom ring 3;

[0033] Auxiliary mechanism 6 is fixedly installed on top ring 1;

[0034] The sampling mechanism 5 includes a sampling tube 51. The upper and lower ends of the sampling tube 51 are slidably connected to the upper surfaces of the top ring 1 and the bottom ring 3, respectively. Six sampling tubes 51 are fixedly spaced along the central axis of the top ring 1 and the bottom ring 3. The outer surfaces of both sides of the sampling tube 51 are symmetrically fixedly connected with clips 52, which are corrugated.

[0035] The inner surface of the top ring 1 is fixedly connected to the upper connecting frame 53, the inner surface of the upper connecting frame 53 is rotatably connected to the sleeve 54, the inner surface of the sleeve 54 is threadedly connected to the threaded rod 55, the top outer surface of the threaded rod 55 is fixedly connected to the support rod 56, and the bottom of the support rod 56 is fixedly connected to the upper surface of the upper connecting frame 53.

[0036] A closed ring 57 is slidably connected to the outer surface of the bottom ring 3. The cross-section of the closed ring 57 is L-shaped. A misaligned slot 58 is opened through the bottom surface of the closed ring 57. Initially, the misaligned slot 58 is misaligned with the through hole on the bottom ring 3.

[0037] The inner surface of the closed ring 57 is provided with an annular groove 59, and a friction block 510 is slidably connected in the annular groove 59. The inner surface of the friction block 510 is fixedly connected with a lower connecting frame 511. The upper surface of the middle part of the lower connecting frame 511 is fixedly connected to the bottom of the sleeve 54. The inner surface of the closed ring 57 is fixedly connected with a protrusion 512. The side surface of the bottom ring 3 is provided with a limiting groove 513, and the protrusion 512 is slidably connected in the limiting groove 513.

[0038] Second embodiment: as follows Figures 1 to 8 As shown, the auxiliary mechanism 6 includes a pressing rod 61. The inside of the threaded rod 55 is hollow. The pressing rod 61 is slidably inserted into the inner surface of the threaded rod 55. A cavity is reserved between the bottom of the pressing rod 61 and the bottom of the threaded rod 55. An elastic cover 62 is fixedly connected to the outer surface of the bottom of the pressing rod 61. The top of the elastic cover 62 is fixedly connected to the inner surface of the bottom of the threaded rod 55. The elastic cover 62 is flared.

[0039] The inside of the extrusion rod 61 is hollow. A collar 63 is fixedly sleeved on the top outer surface of the extrusion rod 61. A hose 64 is fixedly connected to the outer surface of the collar 63. The end of the hose 64 away from the collar 63 is fixedly connected to the upper surface of the top ring 1. The top of the hose 64 communicates with the internal cavity of the extrusion rod 61.

[0040] The top ring 1 has a sliding groove 65 inside. The sliding grooves 65 are arranged in pairs as a group. The same group of sliding grooves 65 are symmetrically arranged on both sides of the sampling tube 51. An expansion bladder 66 is fixedly connected inside the sliding groove 65. A slider 67 is fixedly connected to one end of the expansion bladder 66 near the sampling tube 51.

[0041] The top ring 1 has a connecting groove 68 inside. The two ends of the connecting groove 68 are connected to two expansion bladders 66 in the adjacent sliding groove 65 respectively. The connecting groove 68 is connected to the bottom of the hose 64.

[0042] The end of the slider 67 away from the expansion bladder 66 is in elastic contact with the locking strip 52. The surface of the slider 67 away from the expansion bladder 66 does not contact the vertical surface of the locking strip 52. The two sides of the end of the slider 67 near the locking strip 52 are set as inclined surfaces. Buffer grooves 69 are opened through the two sides of the end of the slider 67 near the locking strip 52.

[0043] During operation, if sediment collection is required, the squeezing rod 61 at the top of the collector can be connected to the hydraulic equipment, and the entire collector can be submerged in the reservoir water and gradually lowered. As the collector descends, the bottom surface of the contact ring 4 eventually contacts the soil at the bottom of the water. At this time, with the gradual drive of the external hydraulic equipment, the threaded rod 55 begins to descend, which in turn drives the sleeve 54 connected to it to rotate. This causes the lower connecting frame 511 to rotate through the sleeve 54, causing the friction block 510 to rotate. Due to the frictional connection between the friction block 510 and the ring groove 59, the initial rotation of the friction block 510 will cause the closing ring 57 to start rotating along the outer surface of the bottom ring 3. Ultimately, the misaligned groove 58 on the closing ring 57 will align with the bottom ring 3. The slots for installing sampling tube 51 are aligned and connected. After alignment, the limiting effect between the protrusion 512 and the limiting groove 513 prevents the closed ring 57 from continuing to rotate along the outer surface of the bottom ring 3. At this time, the friction block 510 begins to rotate relative to the closed ring 57 in the ring groove 59. As the threaded rod 55 continues to move downward, it will simultaneously drive the upper connecting frame 53 downward through the support rod 56, thereby causing the top ring 1 to move downward. This causes the sampling tube 51 on the top ring 1 to gradually contact the soil at the bottom of the water through the misaligned slot 58 and gradually enter the silt for soil sampling. Finally, multi-point soil sampling is achieved through six sampling tubes 51. After sampling is completed, the threaded rod 55 is driven upward, and the sleeve 54 reverses. At this time, the ground contact ring 4 is still attached to the water due to the elasticity. On the soil, the top ring 1 drives the sampling tube 51 upward, and eventually the bottom of the sampling tube 51 gradually re-enters the bottom ring 3. At this time, as the threaded rod 55 continues to move upward, the sleeve 54 still drives the lower connecting frame 511 to rotate. At this time, without the obstruction of the sampling tube 51, the lower connecting frame 511 drives the closing ring 57 to reverse, gradually sealing the bottom of the sampling tube 51. This achieves the sealing of the bottom of the sampling tube 51 after sampling, avoiding the problem of soil sample loss due to leakage caused by the bottom of the sampling tube 51 coming into contact with water. However, during the downward sampling process, if any of the six sampling tubes 51 encounters hard objects such as stones, it cannot continue to move downward. At this time, the sampling tube 51 cannot continue due to the elastic compression of the slider 67 in the top ring 1 by the presence of the locking strip 52. The downward-moving sampling tube 51 begins to move upward relative to the top ring 1, while the unobstructed sampling tubes 51 continue to move downward for sampling. This allows other sampling tubes 51 to continue sampling even if some are blocked, avoiding the problem of current sampling equipment needing to frequently adjust the sampling position when encountering hard objects such as stones. This significantly improves sampling efficiency. When the threaded rod 55 moves downward, it first drives the extrusion rod 61 downward within the threaded rod 55, extruding the cavity at the bottom of the threaded rod 55. This extrudes the internal air pressure into the extrusion rod 61, which is then delivered through the hose 64 to the connecting groove 68 in the top ring 1, and finally into the expansion bladder 66 in the slide groove 65.This causes the expansion bladder 66 to push the slider 67 closer to the sampling tube 51 within the groove 65, ultimately squeezing and fitting it against the retaining strips 52 on both sides of the sampling tube 51. This significantly improves the fixation effect on the sampling tube 51. Under sufficiently strong downward pressure, the sampling tube 51 can still move relative to the top ring 1, thus protecting the sampling tube 51 from obstruction by hard objects such as stones. This ensures that the sampling tube 51 stably enters the soil during sampling, greatly improving the working stability of the sampling tube 51. After sampling is completed, the squeezing rod 61 and the threaded rod 55 move upwards synchronously. When the squeezing rod 61 and the threaded rod 55 reach the top synchronously, the top ring 1 can no longer move. At this time, the squeezing rod 61 continues to move upwards relative to the threaded rod 55, causing the cavity at the bottom of the threaded rod 55 to be stretched into a negative pressure. Air pressure is drawn from inside the squeezing rod 61, causing the expansion bladder 66 to contract. This causes the slider 67 to move into the groove 65, losing its fixation effect on the sampling tube 51. To facilitate the reset of the six sampling tubes 51 for subsequent sampling, if any sampling tube 51 is blocked, the retaining strips 52 on both sides of the sampling tube 51 begin to move relative to the top ring 1. This causes the retaining strips 52 to press against the slider 67, causing the sliders 67 on both sides of the blocked sampling tube 51 to move into the groove 65. This, in turn, compresses the expansion bladder 66 at the top of the blocked sampling tube 51, increasing the air pressure in the expansion bladders 66 on both sides of the other sampling tubes 51. This increases the pressure between the slider 67 and the retaining strips 52 on the sampling tube 51, causing the slider 67 on the unblocked sampling tube 51 to continue moving closer to the retaining strips 52 and engage with them. At this time, the buffer groove 69 on the slider 67 is compressed, providing buffer space for the slider 67. This achieves the goal of simultaneously enhancing the fixing effect between the remaining sampling tubes 51 and the top ring 1 when some sampling tubes 51 are blocked, thereby significantly improving the working stability of the sampling tubes 51.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-point sampling collector for sediment deposits in deep-water reservoirs, comprising a top ring (1), characterized in that: The top ring (1) is hexagonal, and a connecting rod (2) is elastically and slidably connected through the upper surface of the top ring (1). A bottom ring (3) is fixedly connected to the bottom of the connecting rod (2), and a ground contact ring (4) is fixedly connected to the bottom of the bottom ring (3) through a connecting rod. The system also includes: A sampling mechanism (5) is movably mounted on a top ring (1) and a bottom ring (3); Auxiliary mechanism (6), which is fixedly installed on top ring (1); The sampling mechanism (5) includes a sampling tube (51), the upper and lower ends of which are slidably connected to the upper surfaces of the top ring (1) and the bottom ring (3), respectively. Six sampling tubes (51) are fixedly spaced along the central axis of the top ring (1) and the bottom ring (3). The outer surfaces of both sides of the sampling tube (51) are symmetrically fixedly connected with clips (52), and the clips (52) are corrugated. The inner surface of the top ring (1) is fixedly connected to an upper connecting frame (53), the inner surface of the upper connecting frame (53) is rotatably connected to a sleeve (54), the inner surface of the sleeve (54) is threadedly connected to a threaded rod (55), the top outer surface of the threaded rod (55) is fixedly connected to a support rod (56), and the bottom of the support rod (56) is fixedly connected to the upper surface of the upper connecting frame (53). The auxiliary mechanism (6) includes a pressing rod (61), the inside of the threaded rod (55) is hollow, the pressing rod (61) is slidably inserted into the inner surface of the threaded rod (55), the bottom of the pressing rod (61) and the bottom of the threaded rod (55) are reserved with a cavity, an elastic cover (62) is fixedly connected to the bottom outer surface of the pressing rod (61), the top of the elastic cover (62) is fixedly connected to the bottom inner surface of the threaded rod (55), and the elastic cover (62) is set in a trumpet shape; A closed ring (57) is slidably connected to the outer surface of the bottom ring (3). The cross-section of the closed ring (57) is set to L-shape. A misaligned slot (58) is opened through the bottom surface of the closed ring (57). The misaligned slot (58) is initially misaligned with the through hole on the bottom ring (3). The inner surface of the closed ring (57) is provided with an annular groove (59), and a friction block (510) is slidably connected in the annular groove (59). The inner surface of the friction block (510) is fixedly connected with a lower connecting frame (511). The upper surface of the middle part of the lower connecting frame (511) is fixedly connected to the bottom of the sleeve (54). The inner surface of the closed ring (57) is fixedly connected with a protrusion (512). The side surface of the bottom ring (3) is provided with a limiting groove (513), and the protrusion (512) is slidably connected in the limiting groove (513).

2. A multi-point sampling collector for sediment deposits in deep-water reservoirs according to claim 1, characterized in that: The inside of the extrusion rod (61) is hollow. A collar (63) is fixedly sleeved on the top outer surface of the extrusion rod (61). A hose (64) is fixedly connected to the outer surface of the collar (63). One end of the hose (64) away from the collar (63) is fixedly connected to the upper surface of the top ring (1). The top of the hose (64) communicates with the internal cavity of the extrusion rod (61).

3. A multi-point sampling collector for sediment deposits in deep-water reservoirs according to claim 2, characterized in that: The top ring (1) has a sliding groove (65) inside. The sliding grooves (65) are arranged in pairs. The sliding grooves (65) in the same group are symmetrically arranged on both sides of the sampling tube (51). An expansion bladder (66) is fixedly connected inside the sliding groove (65). A slider (67) is fixedly connected to one end of the expansion bladder (66) near the sampling tube (51).

4. A multi-point sampling collector for sediment deposits in deep-water reservoirs according to claim 3, characterized in that: The top ring (1) has a connecting groove (68) inside. The two ends of the connecting groove (68) are connected to two expansion bladders (66) in the adjacent sliding groove (65) respectively. The connecting groove (68) is connected to the bottom of the hose (64).

5. A multi-point sampling collector for sediment deposits in deep-water reservoirs according to claim 4, characterized in that: The end of the slider (67) away from the expansion bladder (66) is elastically engaged with the locking strip (52). The side surface of the slider (67) away from the expansion bladder (66) does not contact the vertical surface of the locking strip (52). The two sides of the end of the slider (67) near the locking strip (52) are set as inclined surfaces. The two sides of the end of the slider (67) near the locking strip (52) are provided with buffer grooves (69).

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