A stratified greenhouse soil sampler

Abstract

This invention provides a stratified greenhouse soil sampler, comprising an inverted U-shaped positioning frame. Two vertically aligned positioning plates are positioned on either side of the lower end of the U-shaped positioning frame. A sampling tube with an open lower end is movably mounted inside the U-shaped positioning frame. A threaded connection hole is provided at the upper end of the U-shaped positioning frame, and a threaded drive shaft is threadedly connected to the threaded connection hole. The lower end of the threaded drive shaft is connected to the upper end of the sampling tube, and a vertically aligned operating handle is provided at the upper end of the threaded drive shaft. Multiple horizontally spaced strip-shaped stratification slots are provided horizontally through the sampling tube, evenly distributed along its height. This invention allows soil samples to be extracted and separated into layers according to depth after sampling, facilitating layered isolation and preservation, thereby improving the scientific rigor and practicality of soil testing.

Description

Technical Field

[0001] This utility model belongs to the technical field of soil testing equipment, and relates to a greenhouse soil sampler that can perform stratified sampling. Background Technology

[0002] In modern agricultural production, facility agriculture, especially plastic greenhouse cultivation, has been widely used in the cultivation of vegetables, fruits, and cash crops due to its controllable environmental conditions and high yield efficiency. To ensure healthy crop growth and sustainable soil use, regular testing of the physicochemical properties of greenhouse soil is crucial, and accurately obtaining representative soil samples is a prerequisite for scientific soil testing and formulation, precise fertilization, and soil improvement. Traditional soil sampling often relies on manual digging with shovels or simple soil drills, which is time-consuming, labor-intensive, and prone to disturbing the soil layer, affecting the accuracy of the samples. With technological advancements, various soil samplers have been developed and applied in field operations. These typically employ a hollow tubular structure, inserted into the soil by rotation or downward pressure to collect soil samples within a certain depth range.

[0003] However, existing greenhouse soil samplers generally suffer from simple structures and limited functionality. Although some devices can achieve rapid soil insertion and sample extraction, after sampling, soil samples from different depths are often mixed and stored in the same chamber, making it impossible to isolate and preserve them according to preset depths. This "whole extraction" method makes it difficult for subsequent laboratory analyses to distinguish key indicators such as nutrient distribution, pH gradient, salt accumulation, or microbial activity in each soil layer, severely restricting the refined assessment of greenhouse soil profile characteristics. Utility Model Content

[0004] The purpose of this invention is to provide a greenhouse soil sampler that can be used for stratified sampling. After soil sampling, the sample can be extracted in layers according to depth, so as to facilitate layered isolation and preservation, thereby improving the scientific nature and practicality of soil testing.

[0005] To solve the above-mentioned technical problems, this utility model provides a greenhouse soil sampler capable of stratified sampling, including an inverted U-shaped positioning frame. Positioning plates perpendicular to the frame are provided on both sides of the lower end of the U-shaped positioning frame. A sampling tube with an open lower end is movably disposed within the U-shaped positioning frame. A threaded connection hole is provided at the upper end of the U-shaped positioning frame, and a threaded drive shaft is threadedly connected to the threaded connection hole. The lower end of the threaded drive shaft is connected to the upper end of the sampling tube. An operating handle perpendicular to the threaded drive shaft is provided at the upper end of the threaded drive shaft. Multiple horizontally spaced, strip-shaped stratified insertion ports are provided horizontally through the sampling tube, evenly spaced along its height direction.

[0006] By adopting the above technical solution, when sampling greenhouse soil, first place the U-shaped positioning frame at the desired sampling location, and step on the positioning plate with both feet to fix its position and prevent movement during sampling. Next, place the layered partition in the U-shaped carrying slot for later use. Then, by rotating the operating handle, the threaded drive shaft is rotated. Since the threaded drive shaft is threadedly connected to the threaded connection hole, and its lower end is connected to the sampling tube, it will drive the sampling tube downward, allowing the sampling tube to be smoothly inserted into the soil. When the sampling tube is inserted to the required depth, stop rotating the operating handle and pull the sampling tube out of the soil.

[0007] Subsequently, depending on the required stratification, the stratification divider is inserted into the lowest horizontal stratification slot that needs to be stratified. After insertion, the stratification divider will separate the soil in the sampling tube into layers. After the lower soil is discharged, the stratification divider is removed and gradually inserted upwards into the corresponding horizontal stratification slots. The soil at different depths is then extracted and stored in sequence using the above method.

[0008] The present invention is further provided that a limiting sleeve for the outer casing of the sampling tube is provided on the inner side of the lower end of the U-shaped positioning frame.

[0009] The present invention is further configured such that the edge of the lower opening end of the sampling tube is provided with a plurality of circumferentially distributed drilling teeth, each drilling tooth being inclined along the helical direction of the outer circumferential thread of the threaded drive shaft.

[0010] The present invention is further configured such that the sampling tube has vertically opened vertical soil-scooping holes between each pair of horizontally layered slots.

[0011] The present invention is further configured to include a layered partition that cooperates with the strip-shaped horizontal layered insertion port, wherein one side of the layered partition is bent to form a hand-pinched piece.

[0012] The present invention is further provided that one side of the U-shaped positioning frame is provided with a U-shaped carrying slot that cooperates with the layered partition.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Firstly, the design of the drilling teeth in this invention makes it easier and less strenuous to insert the sampling tube into the soil. Furthermore, the drilling teeth, which are inclined along the helical direction of the outer thread of the threaded drive shaft, can better cut into the soil when the operating handle is rotated, further improving sampling efficiency. Simultaneously, by setting a limiting sleeve, the sampling tube can be limited, preventing it from shifting during vertical movement and improving sampling accuracy.

[0015] Secondly, the combination of layered partitions and horizontally stratified insertion slots allows for precise stratification of soil at different depths, while the vertical soil-scooping holes facilitate proper cleaning or adjustment of the soil inside the sampling tube during sampling, preventing soil blockage. This effectively solves the problem of existing greenhouse soil samplers being unable to perform stratified sampling, providing a more scientific and practical sampling tool for soil testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of this utility model.

[0018] Among them, 1. U-shaped positioning frame; 2. Positioning plate; 3. Limiting sleeve; 4. Sampling tube; 5. Drilling teeth; 6. Threaded connection hole; 7. Threaded drive shaft; 8. Operating handle; 9. Strip-shaped horizontal layered insertion port; 10. Vertical soil excavation insertion hole; 11. Layered partition; 12. Hand-pinched plate; 13. U-shaped carrying slot. Detailed Implementation

[0019] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed explanation of the stratified greenhouse soil sampler proposed in this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0020] Example, refer to Figure 1-2 A stratified greenhouse soil sampler includes an inverted U-shaped positioning frame 1. Two vertical positioning plates 2 are positioned on either side of the lower end of the U-shaped positioning frame 1. During use, the positioning plates 2 are stepped on to fix the position of the U-shaped positioning frame 1. A limiting sleeve 3, open at both ends, is installed on the inner side of the lower end of the U-shaped positioning frame 1. A sampling tube 4, with an open lower end, is movably installed inside the U-shaped positioning frame 1, cooperating with the limiting sleeve 3. Several circumferentially distributed drilling teeth 5 are provided on the edge of the lower open end of the sampling tube 4. When the sampling tube 4 is rotated, it drills soil through the drilling teeth 5, making it easier to insert the sampling tube 4 downwards. A threaded connection hole 6 is provided at the upper end of the U-shaped positioning frame 1, and a threaded drive shaft 7 is threadedly connected to the threaded connection hole 6. The lower end of the threaded drive shaft 7 is connected to the upper end of the sampling tube 4. Each drilling tooth 5 is inclined along the helical direction of the outer circumferential thread of the threaded drive shaft 7. An operating handle 8 perpendicular to the threaded drive shaft 7 is provided at the upper end of the threaded drive shaft 7.

[0021] The horizontally penetrating sampling tube 4 has eight strip-shaped horizontal stratification inlets 9 evenly spaced along its height. Between each pair of strip-shaped horizontal stratification inlets 9, the sampling tube 4 has a vertical soil-scooping hole 10. If the soil inside the sampling tube 4 is difficult to fall out on its own, a tool can be inserted through the vertical soil-scooping hole 10 to gradually remove the soil. It also includes a stratification partition 11 that mates with the strip-shaped horizontal stratification inlets 9. One side of the stratification partition 11 is bent to form a hand-pinched piece 12. A U-shaped carrying slot 13, which mates with the stratification partition 11, is provided on one side of the U-shaped positioning frame 1 for placing the stratification partition 11. After sampling, the stratification partition 11 is inserted into the corresponding strip-shaped horizontal stratification inlet 9 as needed to stratify the soil. After the lower soil is discharged, the stratification partition 11 is removed and gradually inserted upwards into the corresponding strip-shaped horizontal stratification inlet 9 to achieve stratified sampling.

[0022] Instructions for use: When sampling greenhouse soil, first place the U-shaped positioning frame 1 at the desired sampling location, and step on the positioning plate 2 with both feet to fix its position and prevent movement during sampling. Next, place the layered partition 11 in the slot of the U-shaped carrying insert 13 for later use. Then, rotate the operating handle 8 to drive the threaded drive shaft 7. Since the threaded drive shaft 7 is threadedly connected to the threaded connection hole 6 and its lower end is connected to the sampling tube 4, it will drive the sampling tube 4 to move downwards. The drilling teeth 5 at the lower end of the sampling tube 4 are inclined along the helical direction of the outer circumference thread of the threaded drive shaft 7. When rotating the sampling tube 4, the drilling teeth 5 can drill into the soil more easily, allowing the sampling tube 4 to be smoothly inserted into the soil. When the sampling tube 4 is inserted to the required depth, stop rotating the operating handle 8 and pull the sampling tube out of the soil.

[0023] Subsequently, depending on the required stratification, the stratification partition 11 is inserted into the bottommost horizontal stratification slot 9. After the stratification partition 11 is inserted, it will separate the soil in the sampling tube 4 into layers. Then, the soil at the bottom of the sampling tube 4 is discharged. The discharge method can be to allow the soil to fall off on its own. If the soil is difficult to fall off on its own, a tool can be inserted from the vertical soil-scooping hole 10 to gradually scoop out the soil inside.

[0024] After removing the lower soil layer, the stratifying septa are taken out and gradually inserted upwards into the corresponding horizontal stratifying slots. This process is repeated to extract and preserve soil samples from different depths. This allows for layered extraction of soil samples based on depth, facilitating detailed assessments of key indicators such as nutrient distribution, pH gradient, salt accumulation, and microbial activity in different soil layers, thus enhancing the scientific rigor and practicality of soil testing.

[0025] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0026] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A stratified greenhouse soil sampler, comprising an inverted U-shaped positioning frame (1), characterized in that, The U-shaped positioning frame (1) has two vertically oriented positioning plates (2) on both sides of its lower end. A sampling tube (4) with an open lower end is movably arranged inside the U-shaped positioning frame (1). A threaded connection hole (6) is provided at the upper end of the U-shaped positioning frame (1). A threaded drive shaft (7) is threadedly connected to the threaded connection hole (6). The lower end of the threaded drive shaft (7) is connected to the upper end of the sampling tube (4). An operating handle (8) is provided at the upper end of the threaded drive shaft (7) and is perpendicular to it. Multiple horizontally layered slots (9) are opened horizontally through the sampling tube (4) and are evenly distributed along its height direction.

2. The greenhouse soil sampler capable of stratified sampling according to claim 1, characterized in that, The U-shaped positioning frame (1) is provided with a limiting sleeve (3) on the inner side of the lower end of the sampling tube (4).

3. A stratified greenhouse soil sampler according to claim 1, characterized in that, The sampling tube (4) has several circumferentially distributed drilling teeth (5) at the edge of its lower opening. Each drilling tooth (5) is inclined along the helical direction of the outer circumferential thread of the threaded drive shaft (7).

4. A stratified greenhouse soil sampler according to claim 1, characterized in that, The sampling tube (4) has vertical soil-scooping holes (10) between each pair of horizontally layered insertion ports (9).

5. A stratified greenhouse soil sampler according to claim 1, characterized in that, It also includes a layered partition (11) that mates with the strip-shaped horizontal layered insert (9), one side of which is bent to form a pinchable piece (12).

6. A stratified greenhouse soil sampler according to claim 5, characterized in that, One side of the U-shaped positioning frame (1) is provided with a U-shaped carrying slot (13) that cooperates with the layered partition (11).

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