A bottom sediment layering sampler

Abstract

The utility model discloses a kind of bottom mud sediment layered sampler, it is related to bottom mud sampling technical field, including spliced pole, the inside of the spliced pole is perforated with through pipe, the inside sliding connection of the through pipe has suction block, the top of the suction block is fixedly connected with telescopic rod, the top of the telescopic rod is provided with telescopic motor, the telescopic rod is fixedly connected in the output end of telescopic motor, the suction block, telescopic rod and telescopic motor are used to extract bottom mud sediment.The utility model is through the thread connection design of spliced pole and thread ring, can quickly adjust device length to adapt to different water depth environment, and after dismounting, it is convenient to transport and store.Moreover, telescopic motor drives suction block to form negative pressure and open in cooperation with sector plate, can efficiently extract bottom mud sample.

Description

Technical Field

[0001] This utility model relates to the field of sediment sampling technology, and in particular to a sediment stratification sampler. Background Technology

[0002] Bottom sediments are mixtures of particulate matter, organic matter, inorganic matter, and pollutants that accumulate over long periods at the bottom of water bodies. Their layered structure records regional environmental evolution, pollution history, and ecological processes. Stratified sampling is a core method for studying the spatiotemporal variations of bottom sediments, revealing the material composition, pollution characteristics, and environmental significance of sediments at different depths through vertical profile analysis.

[0003] In existing sediment sampling processes, sediment may slide downwards due to gravity during extraction, leading to sampling failures. Sediment typically exhibits a clear vertical stratification, with each layer corresponding to environmental information from a specific historical period. Sliding causes sequence mixing, where surface contaminated layers mix with deeper clean layers, obscuring the vertical distribution characteristics of pollutants and making it impossible to accurately trace the pollution history.

[0004] To address the aforementioned issue of sediment sequence mixing, a blocking device is installed at the bottom of the sampler. When the sampler moves downwards, the blocking device opens without affecting sampling; when the sampler moves upwards, the blocking device seals off the sediment. The blocking device opens via a spring during downward movement, allowing the sampler to smoothly insert into the sediment; during upward movement, it automatically closes, forming a physical barrier that completely isolates the collected sediment column from the unsampled area below.

[0005] However, in existing sediment sampling processes, hard mud clumps may be encountered, preventing the sediment from being extracted. Hard mud clumps can hinder the sampler from penetrating the target sediment layer, resulting in the loss of samples at critical depths. If the hard layer cannot be penetrated, samples from these critical layers will be completely lost, disrupting the vertical continuity of the sediment. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sediment stratification sampler that solves the problem of potential sediment stratification mixing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sediment stratification sampler includes a splicing rod with a through-tube extending through its interior. A suction block is slidably connected inside the through-tube. A telescopic rod is fixedly connected to the top of the suction block, and a telescopic motor is mounted at the top of the telescopic rod. The telescopic rod is fixedly connected to the output end of the telescopic motor. The suction block, telescopic rod, and telescopic motor are used to extract sediment. The telescopic motor drives the suction block upward, creating negative pressure. Combined with the opening of a fan-shaped plate, this allows for efficient extraction of sediment samples, avoiding the damage to the sediment layer structure caused by traditional excavation methods.

[0009] As a further improvement of this invention, the outer surface of the suction block is made of halogenated butyl rubber. The high proportion of isoprene units in the molecular structure of halogenated butyl rubber gives it extremely low gas permeability, which can effectively prevent air leakage between the suction block and the inner wall of the through-tube, ensuring a stable negative pressure formation inside the tube when the telescopic motor is driven, and improving the efficiency of bottom mud extraction.

[0010] As a further improvement of this utility model, a threaded ring is fixedly connected to the top of the splicing rod, and a threaded groove is formed on the inner wall of the bottom end of the splicing rod. The threaded ring and threaded groove of different splicing rods can be threaded together. A fitting groove is formed on the inner wall of the splicing rod at the top of the threaded groove. The threaded connection design between the splicing rod and the threaded ring allows for quick adjustment of the device length to adapt to different water depth environments, and facilitates transportation and storage after disassembly.

[0011] As a further improvement of this utility model, a threaded ring II is threadedly connected inside the threaded groove. An insertion tube is fixedly connected to the bottom end of the threaded ring II, and a cross-shaped cutting strip is fixedly connected to the inner wall of the threaded ring II. Two fan-shaped plates are symmetrically arranged at the top end of the threaded ring II. The cross-shaped cutting strip physically cuts large pieces of bottom mud into fine particles, preventing them from accumulating and clogging inside the insertion tube or splicing rod, thus ensuring a continuous and stable negative pressure extraction process.

[0012] As a further improvement of this utility model, each of the fan-shaped plates, on its opposite sides, is fixedly connected to a limiting rod. Each limiting rod is externally equipped with a rotary spring. One end of each rotary spring is fixedly connected to the bottom end of the fan-shaped plate, and the other end is fixedly connected to the top end of the threaded ring. This controls the closing and opening of the splicing rod by the fan-shaped plates.

[0013] As a further improvement of this invention, the interior of the insertion tube is funnel-shaped, and the inclination angle inside the insertion tube is 70°~80°. The steep inclination angle of 70°~80° creates a sharp edge at the front end of the insertion tube, reducing the contact area with the bottom mud surface, thereby reducing frictional resistance during insertion. This design is particularly suitable for hard bottom mud, preventing equipment tilting or shifting due to excessive resistance.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. The threaded connection design between the splicing rod and the threaded ring allows for quick adjustment of the device length to adapt to different water depths, and facilitates transportation and storage after disassembly. Furthermore, the telescopic motor drives the suction block upwards to create negative pressure, which, combined with the opening of the fan-shaped plate, allows for efficient extraction of bottom sediment samples.

[0016] 2. The fan-shaped plate forms a physical barrier after it is closed, preventing the bottom sediments of different depths from mixing due to shaking or gravity during the extraction process, thus ensuring that the bottom sediments in the sampling tube maintain their original vertical layered structure.

[0017] 3. The cross-cutting strip physically cuts large pieces of bottom mud into smaller particles, preventing them from accumulating and clogging inside the insertion tube or splicing rod, thus ensuring a continuous and stable negative pressure extraction process. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This utility model Figure 1 A cross-sectional three-dimensional structural diagram of the splicing rod.

[0020] Figure 3 This is a cross-sectional three-dimensional structural diagram of the splicing rod and the threaded ring in this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the insertion tube and the cross-cutting strip in this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the sector plate and the rotary spring in this utility model.

[0023] In the diagram: 101, splicing rod; 102, threaded ring one; 103, threaded groove; 104, fitting groove; 105, through tube; 106, suction block; 107, telescopic rod; 108, telescopic motor; 201, insertion tube; 202, threaded ring two; 203, cross-cutting strip; 204, sector plate; 205, rotating spring; 206, limit rod. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] See attached document Figure 1 - Appendix Figure 5 A sediment stratification sampler includes a suction block 106, a telescopic rod 107, a telescopic motor 108, an insertion tube 201, and a sector plate 204.

[0027] In this embodiment, sediment collection from a water body is taken as an example. When using this invention, the first section of the splicing rod 101 is first connected to the piston drive system of an existing piston sampler, thereby driving the entire device to move up and down. Since the above solutions are existing technologies, they will not be elaborated here. Then, the suction block 106 is pushed along the through-tube 105, causing it to be pushed above the fitting groove 104 of the first section of the splicing rod 101. At this time, the threaded ring 202 is threadedly connected to the threaded groove 103 at the bottom of the first section of the splicing rod 101. After the threaded connection, the insertion tube 201 is aligned with the water and moved downwards by the pushing mechanism. When the insertion tube 201 contacts the sediment, the horn-shaped design inside the insertion tube 201 causes the fan-shaped plate 204 to open due to air pressure. When the insertion tube 201 moves downwards, the sediment thrust overcomes the spring force of the rotating spring 205, causing the fan-shaped plate 204 to open. When lifted upwards, the spring force automatically closes the fan-shaped plate. Simultaneously, the telescopic motor 108 is activated, driving the suction block 106 upward along the through-tube 105. The suction block 106 is made of halogenated butyl rubber, and its outer diameter is 0.5-1mm larger than the inner diameter of the through-tube 105, forming an interference seal to achieve the extraction effect of bottom sediment. Through the threaded connection design between the splicing rod 101 and the threaded ring 202, the length of the device can be quickly adjusted to adapt to different water depth environments, and it is easy to transport and store after disassembly. Moreover, the telescopic motor 108 drives the suction block 106 upward to create negative pressure, which, together with the opening of the fan-shaped plate 204, can efficiently extract bottom sediment samples, avoiding the damage to the bottom sediment layer structure caused by traditional digging methods.

[0028] When one section of the splicing rod 101 is fully submerged in the bottom sediment and further measurements are needed, another section of the splicing rod 101 is inserted through the top of the telescopic motor 108. At this point, the threaded ring 102 connects to the threaded groove 103 of the other section of the splicing rod 101, thus splicing the splicing rods 101 together. This allows for continuous downward sampling of the bottom sediment, and the number of splicing rods 101 accurately determines the depth of the sediment. Each section of the splicing rod has a fixed length, and the total depth after splicing is the sum of the lengths of each section. The sampling depth can be directly determined by counting the number of splicing rods, eliminating the need for additional measuring tools and avoiding the cumulative error of continuous measurements. Furthermore, once one section of the rod is fully inserted into the bottom sediment, it can be spliced ​​to the next section via threaded connection without being pulled out, enabling a continuous "sampling while inserting" workflow and significantly reducing the time spent on repeated positioning and adjustments.

[0029] As the sediment enters the splicing rod 101 through the insertion tube 201, it first passes through the cross-cutting strip 203, which cuts the sediment to prevent it from becoming too hard and sticky. Sediment tends to form large clumps; the cross-cutting strip 203 physically cuts these clumps into smaller particles, preventing them from accumulating and clogging within the insertion tube 201 or splicing rod 101, thus ensuring a continuous and stable negative pressure extraction process. Furthermore, the cutting action of the strip is limited to a localized area, without damaging the overall structure of the sediment's vertical profile, preserving the original layering information of sediment at different depths.

[0030] After the sediment sampling is completed, the movable splicing rod 101 moves upward, causing the sediment at the flared end of the insertion tube 201 to detach. Then, under the elastic action of the limiting rod 206, the sector plate 204 re-closes the threaded ring 202, thereby preventing sediment layer mixing during extraction. The closed sector plate 204 forms a physical barrier, preventing sediment from different depths from mixing due to shaking or gravity during extraction, ensuring that the sediment inside the sampling tube maintains its original vertical layered structure.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sediment stratification sampler, comprising a splicing rod (101), characterized in that, The splicing rod (101) has a through-tube (105) inside, and a suction block (106) is slidably connected inside the through-tube (105). A telescopic rod (107) is fixedly connected to the top of the suction block (106), and a telescopic motor (108) is provided at the top of the telescopic rod (107). The telescopic rod (107) is fixedly connected to the output end of the telescopic motor (108). The suction block (106), the telescopic rod (107) and the telescopic motor (108) are used to extract bottom sediment.

2. The sediment stratification sampler according to claim 1, characterized in that, The outer surface of the suction block (106) is made of halogenated butyl rubber.

3. A sediment stratification sampler according to claim 1, characterized in that, The top end of the splicing rod (101) is fixedly connected to a threaded ring (102), and the bottom inner wall of the splicing rod (101) is provided with a threaded groove (103). The threaded ring (102) and the threaded groove (103) of different splicing rods (101) can be threaded together. The inner wall of the splicing rod (101) is provided with a fitting groove (104) at the top end of the threaded groove (103).

4. A sediment stratification sampler according to claim 3, characterized in that, The threaded groove (103) is internally threaded with a threaded ring 2 (202), the bottom end of the threaded ring 2 (202) is fixedly connected with an insertion tube (201), the inner wall of the threaded ring 2 (202) is fixedly connected with a cross-cutting strip (203), and the top end of the threaded ring 2 (202) is symmetrically provided with two fan-shaped plates (204).

5. A sediment stratification sampler according to claim 4, characterized in that, Each of the fan-shaped plates (204) has a limiting rod (206) fixedly connected inside on the side away from each other. Each limiting rod (206) has a rotating spring (205) on its outside. One end of the rotating spring (205) is fixedly connected to the bottom end of the fan-shaped plate (204), and the other end of the rotating spring (205) is fixedly connected to the top end of the threaded ring (202).

6. A sediment stratification sampler according to claim 4, characterized in that, The interior of the insertion tube (201) is funnel-shaped, and the inclination angle inside the insertion tube (201) is 70°~80°.

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