A quantitative hand-held soil sampling device

Abstract

The utility model relates to soil sampling technical field, propose a kind of quantitative hand-held soil sampling device, including sampling cylinder, the top of sampling cylinder is fixedly connected with fixed frame, the inside of sampling cylinder is provided with ration board, ration board and the inner wall of sampling cylinder are slidably connected, the top of ration board is fixedly connected with rack, the top of sampling cylinder is provided with the adjusting mechanism for driving rack to slide in vertical direction, the inside of fixed frame is provided with the measuring mechanism for measuring the vertical displacement of rack. The utility model solves the core problem of quantitative sampling by mechanical precision volume control, ensures the stability of quantitative by the self-locking characteristic of worm gear, avoids cross contamination by integrated push design, while maintaining the portability of handheld device.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, specifically to a quantitative handheld soil sampling device. Background Technology

[0002] Soil sampling is a fundamental and crucial task in fields such as environmental monitoring, agricultural science, and geological exploration. Obtaining representative and accurately quantified soil samples is essential for subsequent laboratory analysis, soil quality assessment, and pollution status determination. Currently, traditional handheld samplers, such as soil augers, tube samplers, or simple sampling cylinders, are widely used for field soil sampling, especially for stratified or quantitative sampling. These devices typically consist of a hollow cylinder and a handle. Operators use their own strength to press or screw the sampler into the soil and then retrieve it for laboratory analysis.

[0003] However, existing sampling devices have obvious technical shortcomings: First, existing samplers rely entirely on the operator's experience and skills to estimate sampling depth and volume. Significant differences in soil sample size can occur between different sampling sessions and between different operators, leading to insufficient sample representativeness and severely impacting the accuracy and comparability of experimental data. For example, in comparative studies of soil chemical composition, inconsistent sample sizes can directly result in errors in concentration calculations. Second, existing samplers lack built-in quantitative control mechanisms, making it difficult to ensure that sample volumes collected from different locations or multiple times at the same location are identical. This poses a significant challenge to applications requiring high-precision quantitative analysis (such as quantitative assessment of pollutants and fertilizer effectiveness studies). Third, after the existing sampler has finished sampling, it usually requires the use of other tools (such as a bulldozer) to knock or poke the sample out of the sampling tube. This process is not easy to clean thoroughly, and the soil remaining on the tube wall may contaminate the next sample collected. Especially when working continuously between different locations, the risk of cross-contamination is high. In view of this, the present invention proposes a quantitative handheld soil sampling device. Utility Model Content

[0004] This invention proposes a quantitative handheld soil sampling device, which solves the problem that quantitative sampling is not possible in the prior art.

[0005] The technical solution of this utility model is as follows: A quantitative handheld soil sampling device includes a sampling tube, a fixing frame fixedly connected to the top of the sampling tube, a quantitative plate provided on the inner side of the sampling tube, the quantitative plate being slidably connected to the inner wall of the sampling tube, a rack fixedly connected to the top of the quantitative plate, an adjustment mechanism for driving the rack to slide in the vertical direction provided on the top of the sampling tube, and a measuring mechanism for measuring the vertical displacement of the rack provided on the inner side of the fixing frame.

[0006] Preferably, an extension rod is fixedly connected to the top of the fixing frame, and a handle is fixedly connected to the top of the extension rod.

[0007] Preferably, the bottom edge of the sampling tube is provided with a plurality of serrated grooves, which are distributed at equal angles around the sampling tube.

[0008] Preferably, the adjustment mechanism includes a mounting base fixedly connected to the top of the sampling tube, and a transmission gear is rotatably connected to the inner side of the mounting base, the transmission gear meshing with a rack.

[0009] Preferably, the adjusting mechanism further includes a worm gear fixedly connected to the transmission gear on the same axis, a worm is rotatably connected to one end of the top of the sampling cylinder, the worm meshes with the worm gear, and a rotating cap is fixedly connected to one end of the worm.

[0010] Preferably, a measuring plate is fixedly connected to the top of the rack, and guide grooves are provided on both sides of the fixing frame in the vertical direction, with the measuring plate and the guide grooves fitting together with a clearance.

[0011] Preferably, a scale is fixedly connected to the outer wall of each of the two guide grooves, and the scale is arranged parallel to the guide groove.

[0012] The working principle and beneficial effects of this utility model are as follows: 1. The rack is driven by a rotary adjustment mechanism (worm gear-worm wheel-gear transmission), thereby precisely controlling the position of the quantitative plate within the sampling cylinder. The position of the quantitative plate determines the volume of the sampling chamber. Operators can intuitively and accurately set the required sampling volume through the dial on the measuring mechanism, ensuring consistent soil sample volume for each collection. This provides highly accurate basic data for laboratory analysis (such as pollutant concentration and nutrient content determination), avoiding calculation errors caused by differences in sample volume.

[0013] 2. The system employs a worm gear and worm wheel transmission combination. The worm gear drives the worm wheel, which has a large reduction ratio. This means that a slight rotation of the rotating cap can generate sufficient torque to move the metering plate, saving effort. More importantly, the worm gear and worm wheel mechanism has a reverse self-locking characteristic, meaning that the worm wheel cannot drive the worm gear in the reverse direction. This ensures that during the process of pressing the sampling tube into the soil, the upward pushing force of the soil on the metering plate cannot cause the transmission system to reverse, thereby locking the preset sampling volume and ensuring the reliability of the metering.

[0014] 3. After sampling, no external tools (such as tapping or using another pusher) are needed. Simply operate the adjustment mechanism again to drive the quantitative plate to continue moving downwards, and the columnar soil sample will be completely pushed out from the bottom of the sampling tube. At the same time, the quantitative plate also acts as a scraper during the pushing process, scraping away the residual soil adhering to the inner wall of the sampling tube, providing a clean container for the next sampling. This is particularly suitable for scenarios that require continuous sampling at different locations (such as the investigation of contaminated sites), effectively preventing the residual pollutants from the previous location from affecting the test results of the next location, and ensuring the independence of each sample. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a quantitative handheld soil sampling device according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a quantitative handheld soil sampling device according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the adjustment mechanism of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the measuring mechanism of this utility model.

[0017] In the diagram: 1. Sampling tube; 11. Serrated groove; 12. Assembly groove; 2. Fixing frame; 3. Extension rod; 4. Handle; 5. Quantitative plate; 6. Rack; 7. Adjustment mechanism; 71. Mounting base; 72. Transmission gear; 73. Worm gear; 74. Worm; 75. Rotating cap; 8. Measuring mechanism; 81. Measuring plate; 82. Guide groove; 83. Dial. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] like Figures 1-5 As shown, this embodiment proposes a quantitative handheld soil sampling device, including a sampling cylinder 1, a fixing frame 2 fixedly connected to the top of the sampling cylinder 1, an extension rod 3 fixedly connected to the top of the fixing frame 2, and a handle 4 fixedly connected to the top of the extension rod 3; a quantitative plate 5 is provided on the inner side of the sampling cylinder 1, the quantitative plate 5 is slidably connected to the inner wall of the sampling cylinder 1, a rack 6 is fixedly connected to the top of the quantitative plate 5, an assembly groove 12 is provided on the top wall of the sampling cylinder 1 to fit the rack 6 with clearance, an adjustment mechanism 7 is provided on the top of the sampling cylinder 1 to drive the rack 6 to slide in the vertical direction, and a measuring mechanism 8 is provided on the inner side of the fixing frame 2 to measure the vertical displacement of the rack 6.

[0020] By operating the adjustment mechanism 7, the rack 6 is driven to slide vertically, so that the quantitative plate 5 slides up and down in the sampling tube 1. The operator observes the scale 83 of the measuring mechanism 8 and, according to the position of the measuring plate 81 in the guide groove 82, precisely adjusts the quantitative plate 5 to the predetermined height in the sampling tube 1. This height determines the sampling volume, that is, the target amount of this sampling. This design can pre-set and collect a specific volume of soil sample, ensuring the consistency between different samples or multiple samplings at the same location, and greatly improving the accuracy and comparability of experimental data. In addition, after sampling is completed, the adjusting mechanism 7 drives the rack 6 to move downward, so that the quantitative plate 5 slides downward inside the sampling tube 1. The quantitative plate 5 can push out the soil sample in the sampling tube 1, and at the same time, the quantitative plate 5 removes the soil from the inner wall of the sampling tube 1 to avoid residual soil from contaminating the next sampling.

[0021] Furthermore, the bottom edge of the sampling tube 1 is provided with several serrated grooves 11, which are distributed at equal angles around the sampling tube 1. The design of the serrated grooves 11 helps to cut and break the soil, making it easier for the sampling tube 1 to be inserted into the soil.

[0022] Furthermore, the adjustment mechanism 7 includes a mounting base 71 fixedly connected to the top of the sampling tube 1. A transmission gear 72 is rotatably connected to the inner side of the mounting base 71. The transmission gear 72 meshes with the rack 6. A worm gear 73 is coaxially fixedly connected to the transmission gear 72. A worm 74 is rotatably connected to one end of the top of the sampling tube 1. The worm 74 meshes with the worm gear 73. A rotating cap 75 is fixedly connected to one end of the worm 74.

[0023] Quantitative settings are performed before sampling, and the specific implementation process is as follows: The rotating cap 75 of the rotating adjustment mechanism 7 drives the worm gear 74 to rotate, which in turn drives the worm wheel 73 to rotate. Since the worm wheel 73 is coaxial with the transmission gear 72, it drives the transmission gear 72 to rotate. The transmission gear 72 meshes with the rack 6 fixed on the quantitative plate 5, converting the rotational motion into the linear motion of the rack 6. This causes the quantitative plate 5 to slide up and down inside the sampling cylinder 1. By observing the scale 83 of the measuring mechanism 8, the operator can precisely adjust the quantitative plate 5 to the predetermined height inside the sampling cylinder 1 according to the position of the measuring plate 81 in the guide groove 82. This height determines the volume of the sampling chamber, i.e., the target amount of this sampling. This design solves the problem that traditional sampling methods cannot accurately control the sampling amount. With the precisely adjustable quantitative plate 5 and the measuring mechanism 8 with the scale 83, the user can pre-set and collect a specific volume of soil sample, ensuring the consistency between different samples or multiple samplings at the same location, and greatly improving the accuracy and comparability of experimental data.

[0024] Furthermore, a measuring plate 81 is fixedly connected to the top of the rack 6, and guide grooves 82 are provided on both sides of the fixing frame 2 in the vertical direction. The measuring plate 81 and the guide grooves 82 are fitted with a clearance. A scale 83 is fixedly connected to the outer wall of each of the two guide grooves 82, and the scale 83 is arranged parallel to the guide grooves 82.

[0025] Working principle: Before sampling, the rotating cap 75 of the rotating adjustment mechanism 7 drives the worm 74 to rotate. The worm 74 drives the worm wheel 73, which meshes with it, to rotate. Since the worm wheel 73 is coaxial with the transmission gear 72, it drives the transmission gear 72 to rotate. The transmission gear 72 meshes with the rack 6 fixed on the quantitative plate 5, converting the rotational motion into the linear motion of the rack 6, thereby pushing the quantitative plate 5 to slide up and down in the sampling cylinder 1. The operator observes the scale 83 of the measuring mechanism 8 and, according to the position of the measuring plate 81 in the guide groove 82, precisely adjusts the quantitative plate 5 to the predetermined height in the sampling cylinder 1. This height determines the volume of the sampling chamber, that is, the target amount of this sampling. After setting the sampling volume, hold the handle 4 and align the serrated groove 11 at the bottom of the sampling tube 1 with the soil surface and apply pressure. The soil enters the tube from the bottom opening of the sampling tube 1 and accumulates on the upper surface of the quantitative plate 5. Since the position of the quantitative plate 5 is fixed, the soil will continue to fill until the cavity below it is filled. Then, lift the entire device upwards, and the sampling tube 1 is pulled out of the soil. The tube contains a fixed amount of soil sample in a column. By operating the adjustment mechanism 7 again to push down the quantitative plate 5, the soil sample can be pushed out from the bottom of the sampling tube 1 to complete the sampling. At the same time, the quantitative plate 5 removes the soil from the inner wall of the sampling tube 1 to avoid residual soil from contaminating the next sampling.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A quantitative handheld soil sampling device, comprising a sampling tube (1), wherein a fixing frame (2) is fixedly connected to the top of the sampling tube (1), characterized in that, A quantitative plate (5) is provided on the inner side of the sampling tube (1). The quantitative plate (5) is slidably connected to the inner wall of the sampling tube (1). A rack (6) is fixedly connected to the top of the quantitative plate (5). An adjustment mechanism (7) for driving the rack (6) to slide in the vertical direction is provided on the top of the sampling tube (1). A measuring mechanism (8) for measuring the vertical displacement of the rack (6) is provided on the inner side of the fixing frame (2).

2. The quantitative handheld soil sampling device according to claim 1, characterized in that, An extension rod (3) is fixedly connected to the top of the fixing frame (2), and a handle (4) is fixedly connected to the top of the extension rod (3).

3. The quantitative handheld soil sampling device according to claim 1, characterized in that, The bottom edge of the sampling tube (1) is provided with a number of serrated grooves (11), which are distributed at equal angles around the sampling tube (1).

4. A quantitative handheld soil sampling device according to claim 1, characterized in that, The adjustment mechanism (7) includes a mounting base (71) fixedly connected to the top of the sampling tube (1), and a transmission gear (72) is rotatably connected to the inner side of the mounting base (71), and the transmission gear (72) meshes with the rack (6).

5. A quantitative handheld soil sampling device according to claim 4, characterized in that, The adjustment mechanism (7) also includes a worm gear (73) that is coaxially fixedly connected to the transmission gear (72). A worm (74) is rotatably connected to one end of the top of the sampling tube (1). The worm (74) meshes with the worm gear (73). A rotating cap (75) is fixedly connected to one end of the worm (74).

6. A quantitative handheld soil sampling device according to claim 1, characterized in that, A measuring plate (81) is fixedly connected to the top of the rack (6), and guide grooves (82) are provided on both sides of the fixing frame (2) in the vertical direction. The measuring plate (81) and the guide grooves (82) are fitted with a clearance.

7. A quantitative handheld soil sampling device according to claim 6, characterized in that, The outer walls of the two guide grooves (82) are fixedly connected with dials (83), and the dials (83) are arranged parallel to the guide grooves (82).

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