Sampling device for paddy field deep soil in irrigation period
By designing a sampling device consisting of a cylinder, a soil column cutter, and a bulldozer, the problem of sampling deep soil in paddy fields was solved, achieving efficient and convenient soil sample acquisition, which is suitable for research on deep soil in paddy fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-29
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies are difficult to use efficiently and conveniently to collect samples from paddy fields during the irrigation period, especially deep soil samples. Furthermore, traditional tools are costly and complex in structure, and cannot adapt to the high water content and clayey soil environment of paddy fields.
A sampling device comprising a cylinder, a soil column cutter, and a bulldozer was designed. The cylinder has a sampling hole and an overflow outlet. The soil column cutter cuts the soil column with a cutting shovel, and the bulldozer pushes out the soil column. Combined with the overflow outlet for drainage, the structure is simplified and the cost is reduced.
It improves sampling efficiency and sample integrity, reduces the draining process, and ensures sampling accuracy and convenience, making it suitable for efficient sampling of deep soil samples from paddy fields.
Smart Images
Figure CN223985881U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of soil sampling device technology, and in particular to a sampling device for deep soil in paddy fields during the irrigation period. Background Technology
[0002] Rice is one of China's main food crops, widely cultivated and crucial for ensuring national food security. Paddy soil is a special soil type formed under long-term flooding conditions, possessing unique physical, chemical, and biological characteristics. It has a high microbial content and, unlike dryland soils, exhibits unique redox processes that influence nutrient cycling and microbial-mediated soil organic matter (SOM) turnover. Studying the formation and preservation mechanisms of SOM in paddy soil is of great value for improving the efficiency of farmland soil organic carbon pool management and optimizing the agricultural ecological environment. In this field, collecting paddy soil samples is a fundamental step in research, especially deep soil sampling during the irrigation period, which can provide crucial data support for revealing the unique properties of paddy soil.
[0003] During the irrigation period, the soil in paddy fields is muddy and has a high water content. Currently, the common method for sampling paddy field soil is manual digging with a shovel. This process is time-consuming and labor-intensive, and the soil extracted by shovel contains a lot of moisture, requiring draining before being placed in resealable bags. This is insufficient for large sample volumes, especially for sampling deep soil layers. Traditional soil samplers typically consist of a metal tube and handle, which are inserted into the soil to obtain samples. However, their design is mostly geared towards dryland soils and is ill-suited to the muddy soil environment of paddy fields, which has high water content and poor adhesion. In addition, there are some improved sampling tools, such as sampling tubes with sealing devices or samplers with helical propulsion structures. While these can improve sampling efficiency to some extent, their complex structure and high cost still make them inconvenient and ineffective for sampling deep paddy field soils, posing certain inconveniences and difficulties for rice soil-related research. Utility Model Content
[0004] To improve the convenience and reliability of deep soil sampling in paddy fields during the irrigation period, this application provides a sampling device for deep soil in paddy fields during the irrigation period.
[0005] The sampling device for deep soil in paddy fields during the irrigation period provided in this application adopts the following technical solution:
[0006] A sampling device for deep soil in paddy fields during the irrigation period includes a cylinder, a soil column cutter, and a bulldozer. The cylinder has sampling holes extending through both ends along its axial direction. An overflow port communicating with the sampling holes is provided on the upper end or a side wall near the upper end of the cylinder.
[0007] The cylinder has an insertion channel on one side, and the soil column cutting component includes a connecting part and a cutting shovel fixed to the end of the connecting part; the cutting shovel can pass through the insertion channel and be inserted into the sampling hole to cut the soil column in the sampling hole;
[0008] The bulldozer includes a push rod and a piston block fixed to the end of the push rod. The piston block can extend into the sampling hole to push out a soil column from the sampling hole.
[0009] In use, the entire cylinder is pressed vertically downwards into the deep soil of the paddy field during the irrigation period, to an appropriate depth as needed. Then, the soil column cutter is inserted into the insertion channel of the cylinder, and the cutting shovel extends into the sampling hole near the lower end of the cylinder to cut the soil column in the sampling hole, thus separating the soil column in the sampling hole from the soil below. The cutting shovel can also support the soil column in the sampling hole. After the cylinder is pulled out of the soil and moved to the predetermined position, the entire soil column cutter is pulled out. Then, the bulldozer is pushed into the sampling hole from the upper end of the cylinder, and the piston pusher is used to push the soil column in the sampling hole out completely and cleanly.
[0010] By adopting the above technical solution, water entering the cylinder can be discharged through the overflow port, reducing the need for a dedicated draining process and making it more convenient and efficient. The cutting shovel of the soil column cutting component can not only cut or separate soil columns at different depths during sampling, but also effectively prevent the soil column from falling when lifting the sampling device. By using a bulldozer in conjunction with the cylinder, the soil column in the sampling hole can be completely and cleanly pushed out. The entire device has a simple structure, low manufacturing and operating costs, and is convenient and reliable to use.
[0011] Optionally, a first handle is fixedly connected to the upper end of the cylinder, and the first handle is symmetrically arranged about the cylinder as an axis of symmetry; one side of the cylinder has an additional layer along the length of the cylinder, the additional layer has an arc-shaped structure and both sides of the additional layer are fixedly connected to the outside of the cylinder, and the insertion channel is formed between the additional layer and the outside of the cylinder; a downwardly inclined guide slot is provided at the lower end or near the lower end of the cylinder, the guide slot is connected to the sampling hole and the upper end of the guide slot is connected to the bottom of the insertion channel.
[0012] By adopting the above technical solution, the symmetrical arrangement of the first handle provides a stable grip structure during sampling, facilitating the operator's application of force. This results in more even force distribution when pressing or lifting the cylinder, reducing the operator's physical exertion and improving sampling convenience. The insertion channel formed by the additional layer and the outer side of the cylinder provides a precise guide path for the soil column cutting component, preventing deviation during insertion and ensuring that the cutting shovel accurately enters the sampling hole to complete the soil column cutting. By optimizing the insertion path of the soil column cutting component, sampling efficiency and accuracy are improved. The downward-sloping guide slot design in this application further optimizes the insertion angle of the cutting shovel, allowing it to smoothly transition from the insertion channel into the sampling hole, improving the smoothness of the sampling operation.
[0013] Optionally, the connecting part of the soil column cutting component is arc-shaped, the cutting shovel is made of flexible metal sheet and the cutting shovel is integrally formed with the connecting part; a blocking and limiting component is provided at the end of the connecting part away from the cutting shovel; the side of the cutting shovel away from the connecting part matches the shape of the inner wall of the sampling hole.
[0014] By adopting the above technical solution, the arc-shaped connecting part can better adapt to the structure of the cylinder, making the soil column cutter smoother when inserted into the insertion channel. The cutting shovel made of flexible metal sheet not only has sufficient strength to cut the soil column, but also has a certain degree of flexibility, which can be bent at the bottom of the insertion channel to be inserted into the sampling hole, ensuring the accuracy of the soil column cutting action.
[0015] Alternatively, as another option, the connecting part is rod-shaped, one side of the cutting shovel is hinged to the connecting part, and the other side of the cutting shovel matches the shape of the inner wall of the sampling hole; a fourth handle is provided at the end of the connecting part away from the cutting shovel.
[0016] By adopting the above technical solution, the cutting shovel and the connecting part are hinged. Under the guidance of the guide slot at the bottom of the insertion channel, the cutting shovel can be smoothly inserted into the sampling hole, thereby improving the cutting of the soil column. The soil column cutting part in this application can be made of hard metal, thus having sufficient strength and service life and not being easily damaged.
[0017] Optionally, there are at least two overflow outlets, which are spaced apart on the cylinder along the circumference of the cylinder, and each overflow outlet consists of a plurality of arrayed small holes opened on the side wall of the cylinder.
[0018] By adopting the above technical solution, the overflow outlet is mesh-like, preventing the sampled soil from flowing out of the overflow outlet and also preventing foreign objects from entering the sampling holes of the cylinder. At the same time, the multiple spaced overflow outlets can effectively increase the drainage capacity of the sampling device, avoiding water accumulation during the sampling process that could affect the integrity of the soil column and the sampling efficiency.
[0019] Optionally, a second handle is fixedly provided at one end of the push rod, the piston push block is located at the end of the push rod away from the second handle and the push rod is vertically fixed to the middle of the piston push block; the outer periphery of the piston push block has a thickened flange.
[0020] By adopting the above technical solution, a second handle is provided at one end of the push rod, making it easier for the operator to grip and apply force, allowing the piston pusher block to extend more stably into the sampling hole and push out the soil column. The piston pusher block is located at the end of the push rod away from the second handle and is vertically fixed to the middle of the piston pusher block by the push rod. This structural design ensures uniform transmission of thrust and prevents the soil column from shifting or being damaged during the pushing process. In addition, the thickened flange on the outer periphery of the piston pusher block can effectively increase the contact area with the inner wall of the sampling hole, reduce the compression deformation of the soil column, and ensure the integrity and representativeness of the sample.
[0021] Optionally, the sampling device further includes a stirring rod, which includes a stirring arm, a third handle fixed to one end of the stirring arm, and a stirring blade located on the outer circumferential surface of the stirring arm. The stirring blade is spirally wound around the stirring arm in the circumferential direction.
[0022] By adopting the above technical solution, the sampler can be inserted into the paddy field soil without stratification, and the soil can be mixed by using a stirring rod to ensure the homogeneity of the sample.
[0023] Optionally, the stirring blade extends from one end of the stirring rod having the third handle to the other end; the end of the stirring rod away from the third handle has a guide tip.
[0024] By adopting the above technical solution, the mixing blade extends from one end of the mixing rod to the other, ensuring thorough mixing of the soil throughout the entire sampling depth range during paddy field soil sampling. This improves sample homogeneity and reduces stratification. The guide tip is positioned at the end of the mixing rod furthest from the third handle, which helps reduce resistance when inserting into the muddy paddy soil, making it easier for the mixing rod to reach the target depth and improving operational efficiency.
[0025] Optionally, the cylinder is made of stainless steel, the push rod, stirring rod and stirring blade are made of stainless steel or plastic, and the piston push block is made of plastic; the first handle, second handle, third handle and fourth handle are made of metal or plastic.
[0026] By adopting the above technical solutions, the durability and ease of operation of the sampling device can be effectively improved. Specifically, the cylinder is made of stainless steel, which has good corrosion resistance and structural strength, and can be used for a long time in paddy field environments without easily being damaged; the push rod, stirring rod, and stirring blade are made of stainless steel or plastic, which not only ensures sufficient mechanical performance, but also allows for lightweight design according to actual needs, reducing the difficulty of operation; the piston push block is made of plastic, which has good sealing and friction adaptability, and can push out the soil column in the sampling hole more smoothly, while reducing sample contamination; the first handle, second handle, third handle, and fourth handle are made of metal or plastic, ensuring that the handles have sufficient strength and a comfortable feel, making it convenient for users to apply force during operation.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. By setting an overflow port on the cylinder, excess water can be effectively discharged during the sampling process, avoiding the problem of soil sample shape damage or difficulty in extraction due to excessive water content, thus improving sampling efficiency and sample integrity; at the same time, it reduces the need for a dedicated draining process and improves operational efficiency.
[0029] 2. The cutting shovel of the soil column cutting component in this application can not only cut and separate the soil column during sampling, but also effectively prevent the soil column inside the cylinder from falling when the cylinder is lifted, thus ensuring the accuracy and reliability of sampling.
[0030] 3. The design of the soil column cutting component in this application allows for precise cutting of soil columns at different depths, ensuring the accuracy of stratification during the sampling process and meeting the needs of scientific research for soil samples at specific depths.
[0031] 4. The piston structure of the bulldozer in this application fits tightly with the sampling hole, which can easily push out a soil column with high viscosity, reduce sample loss, and improve the applicability and ease of operation of the sampling device. Attached Figure Description
[0032] Figure 1 This is a three-dimensional structural diagram of the cylinder and soil column cutting component in Embodiment 1 of this application.
[0033] Figure 2 This is a schematic diagram of the exploded structure of the cylinder in this application.
[0034] Figure 3 This is a three-dimensional structural diagram of the bulldozer in this application.
[0035] Figure 4 This is a three-dimensional structural diagram of the stirring rod in this application.
[0036] Figure 5This is a three-dimensional structural schematic diagram of the soil column cutting component in Embodiment 2 of this application.
[0037] In the picture:
[0038] 10. Cylinder body; 11. Sampling hole; 12. Overflow outlet; 13. Insertion channel; 14. Additional layer; 15. First handle; 151. Mounting hole; 16. Guide slot;
[0039] 20. Soil column cutting component; 21. Connecting part; 22. Cutting shovel; 23. Blocking and limiting component; 24. Fourth handle;
[0040] 30. Bulldozer; 31. Push rod; 32. Piston push block; 33. Second handle; 34. Thickened flange;
[0041] 40. Stirring rod; 41. Stirring handle; 42. Stirring blade; 43. Third handle; 44. Guide tip. Detailed Implementation
[0042] The following will be combined with the appendix Figure 1 -Appendix Figure 5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. The described embodiments are only possible technical implementations of this utility model and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of this utility model without creative effort, and these embodiments are also within the protection scope of this utility model.
[0043] Due to the high moisture content and soft, sticky texture of paddy field soil during irrigation, traditional tools are prone to excessive water entering the sampler during sampling, affecting sample integrity and representativeness, requiring a special draining process, and impacting sampling efficiency. Furthermore, when extracting deep soil samples, samples are easily broken or dropped due to uneven stress, making it difficult to ensure accurate sampling depth. These problems not only increase the difficulty of sampling but may also adversely affect the reliability of subsequent research results. Therefore, this application provides a novel sampling device for sampling deep soil from paddy fields during irrigation.
[0044] Example 1
[0045] Reference Figure 1 and Figure 2As shown in the embodiment of this application, the sampling device for deep soil in paddy fields during the irrigation period includes a cylinder 10 and a soil column cutter 20. The cylinder 10 is cylindrical, and has sampling holes 11 extending through both ends along its axial direction. In use, the cylinder 10 is placed vertically, and the orientation of each component is defined based on the orientation of the sampling device in use. An overflow port 12 communicating with the sampling holes 11 is provided on the upper end or near the upper end of the cylinder 10. There are at least two overflow ports 12, which are spaced apart along the circumference of the cylinder 10. Each overflow port 12 is composed of several arrayed small holes on the side wall of the cylinder 10. Preferably, in this embodiment, there are two overflow ports 12 located on both sides of the cylinder 10. In this embodiment, the overflow outlet 12 is mesh-shaped, which can not only realize the overflow function and effectively increase the drainage capacity of the sampling device, but also prevent the sampled soil from flowing out of the overflow outlet 12, and prevent foreign objects from entering the sampling hole 11 of the cylinder 10.
[0046] Reference Figure 1 and Figure 2 As shown, in this application, one side of the cylinder 10 has an additional layer 14 along the length of the cylinder 10. The additional layer 14 has an arc-shaped plate structure and is located on the outside of the cylinder 10. The length of the additional layer 14 is equal to or slightly less than the length of the cylinder 10. The two sides of the additional layer 14 in the width direction are fixed to the outer surface of the cylinder 10. There is a gap between the middle position of the additional layer 14 in the width direction and the outer surface of the cylinder 10, so that an insertion channel 13 is formed between the additional layer 14 and the outer surface of the cylinder 10. The lower end of the additional layer 14 is also fixed to the outer surface of the cylinder 10, and the inner wall of the lower end of the additional layer 14 is inclined. An inclined downward guide groove 16 is provided at the lower end or near the lower end of the cylinder 10. The guide groove 16 is connected to the sampling hole 11 and the upper end of the guide groove 16 is connected to the bottom of the insertion channel 13. The lower side wall of the guide groove 16 is flush with the bottom surface of the insertion channel 13 and smoothly connected.
[0047] Reference Figure 1 and Figure 2 As shown, in this application, a first handle 15 is fixedly connected to the upper end of the cylinder 10. The first handle 15 is symmetrically arranged about the cylinder 10 as the axis of symmetry. The first handle 15 can be a plate structure. The middle part of the first handle 15 has a mounting hole 151 that matches the contour of the cylinder 10 and the additional layer 14. The first handle 15 is sleeved on the upper end of the cylinder 10 through the mounting hole 151 and fixedly connected to the cylinder 10. The specific fixing method can be welding, glue bonding or riveting, etc.
[0048] Reference Figure 1As shown, the soil column cutter 20 includes a connecting portion 21 and a cutting shovel 22 fixed to the end of the connecting portion 21. The cutting shovel 22 can pass through the insertion channel 13 and be inserted into the sampling hole 11 to cut the soil column in the sampling hole 11. Specifically, in this embodiment, the connecting portion 21 of the soil column cutter 20 is arc-shaped, and the cutting shovel 22 is made of a flexible metal sheet and is integrally formed with the connecting portion 21. The cutting shovel 22, made of flexible metal sheet, is initially located in the same straight line direction as the connecting portion 21. After the connecting portion 21 and the cutting shovel 22 are inserted into the insertion channel 13 as a whole, pressure is continued to be applied. Under the guidance of the bottom surface of the insertion channel 13 and the guide slot 16, the cutting shovel 22 will move towards the sampling hole 11. The lateral bending deformation allows it to be inserted laterally at an angle into the sampling hole 11 to cut the soil column in the sampling hole 11. A blocking and limiting member 23 is provided at the end of the connecting part 21 away from the cutting shovel 22. The blocking and limiting member 23 is plate-shaped and is perpendicularly fixed to the connecting part 21. The blocking and limiting member 23 can serve as a handle for easy hand operation by the operator, and can also limit and position the connecting part 21 to prevent the entire connecting part 21 and the cutting shovel 22 from falling into the insertion channel 13 and being difficult to remove. The side of the cutting shovel 22 away from the connecting part 21 matches the shape of the inner wall of the sampling hole 11, for example, it can be conical or peach-tip shaped. In this way, the cutting shovel 22 can better adapt to the inner wall structure of the cylinder 10 and ensure the accuracy of the soil column cutting action.
[0049] Reference Figure 3 and Figure 4 As shown, the sampling device in this application also includes a bulldozer 30 and a mixing rod 40. (See reference...) Figure 3 As shown, the bulldozer 30 includes a push rod 31 and a piston push block 32 fixed to the end of the push rod 31. The piston push block 32 can extend into the sampling hole 11 to push out the soil column inside the sampling hole 11. A second handle 33 is fixed to one end of the push rod 31, which makes it easy for the operator to hold and apply force, so that the piston push block 32 can extend into the sampling hole 11 more stably to push out the soil column. The piston push block 32 is located at the end of the push rod 31 away from the second handle 33, and the push rod 31 is vertically fixed to the middle of the piston push block 32; this structural design ensures uniform transmission of thrust and avoids displacement or damage to the soil column during the pushing process. The outer periphery of the piston push block 32 has a thickened flange 34, which can effectively increase the contact area with the inner wall of the sampling hole 11, reduce the compression deformation of the soil column, and ensure the integrity and representativeness of the sample.
[0050] Reference Figure 4As shown, the stirring rod 40 includes a stirring rod 41, a third handle 43 fixed to one end of the stirring rod 41, and a stirring blade 42 located on the outer circumferential surface of the stirring rod 41. The stirring blade 42 is spirally wound along the circumference of the stirring rod 41 and extends from the end of the stirring rod 41 with the third handle 43 to the other end. The end of the stirring rod 41 away from the third handle 43 has a guide tip 44. The guide tip 44 helps to reduce resistance when inserted into the muddy soil of the paddy field, making it easier for the stirring rod 40 to reach the target depth and improving operating efficiency. In this application, by setting the stirring rod 40, the sampler can be inserted into the paddy field soil without stratification, and the soil can be mixed by the stirring rod 40 to ensure the homogeneity of the sample.
[0051] In this application, the cylinder 10 can be made of stainless steel, the push rod 31, the stirring rod 41, and the stirring blade 42 can be made of stainless steel or plastic, and the piston push block 32 can be made of plastic; the first handle 15, the second handle 33, the third handle 43, and the fourth handle 24 can be made of metal or plastic. This effectively improves the durability and ease of operation of the sampling device.
[0052] The implementation principle is as follows: During use, the entire cylinder 10 is vertically pressed downwards into the deep soil of the paddy field during the irrigation period, to an appropriate depth as needed. Then, the soil column cutter 20 is inserted into the insertion channel 13 of the cylinder 10, and the cutting shovel 22 extends into the sampling hole 11 near the lower end of the cylinder 10, cutting the soil column within the sampling hole 11, thus separating the soil column from the soil below. The cutting shovel 22 can support the soil column within the sampling hole 11. After the cylinder 10 is pulled out of the soil and moved to the predetermined position, the entire soil column cutter 20 is pulled out. Then, the bulldozer 30 is pushed into the sampling hole 11 from the upper end of the cylinder 10, and the piston pusher 32 is used to completely and cleanly push out the soil column within the sampling hole 11. In the case of non-stratified sampling, the sampler is inserted into the paddy field soil, and the mixing rod 40 is used to mix the soil, ensuring the homogeneity of the sample.
[0053] In this application, the water entering the cylinder 10 is discharged through the overflow port 12, reducing the need for a dedicated draining process and making it more convenient and efficient. The cutting shovel 22 of the soil column cutting component 20 can not only cut or separate soil columns at different depths during sampling, but also effectively prevent the soil column from falling when the sampling device is lifted. When used in conjunction with the cylinder 10, the soil column in the sampling hole 11 can be completely and cleanly pushed out. The entire device has a simple structure, low manufacturing and usage costs, and is convenient and reliable to use.
[0054] Example 2
[0055] Reference Figure 5As shown, this embodiment is largely the same as Embodiment 1, except that in this embodiment, the connecting part 21 is rod-shaped, one side of the cutting shovel 22 is hinged to the connecting part 21, and the other side of the cutting shovel 22 matches the shape of the inner wall of the sampling hole 11; a fourth handle 24 is provided at the end of the connecting part 21 away from the cutting shovel 22. The cutting shovel 22 is hinged to the connecting part 21. Under the guidance of the guide slot 16 at the bottom of the insertion channel 13, the cutting shovel 22 can be smoothly inserted into the sampling hole 11 by swinging, thereby improving the cutting of the soil column. The soil column cutting component 20 in this application can be made of hard metal, thus having sufficient strength and service life and being not easily damaged.
[0056] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. A sampling device for deep soil in paddy fields during the irrigation period, characterized in that, The sampling device comprises a barrel (10), a soil column cutting member (20) and a soil pusher (30), the barrel (10) has a sampling hole (11) penetrating through both ends along the axial direction; an overflow port (12) is arranged on the side wall of the upper end or the position close to the upper end of the barrel (10) and is communicated with the sampling hole (11); The barrel (10) has a plug-in channel (13) on one side, the soil column cutting member (20) comprises a connecting part (21) and a cutting shovel (22) fixed on the end of the connecting part (21); the cutting shovel (22) can be inserted into the sampling hole (11) through the plug-in channel (13) to cut the soil column in the sampling hole (11); The soil pusher (30) comprises a push rod (31) and a piston push block (32) fixed on the end of the push rod (31), the piston push block (32) can extend into the sampling hole (11) to push out the soil column in the sampling hole (11).
2. The device for sampling deep soil of a paddy field in a water logging period according to claim 1, wherein The upper end of the barrel (10) is fixed with a first handle (15), the first handle (15) is symmetrically arranged with the barrel (10) as the symmetry axis; one side of the barrel (10) has an additional layer (14) along the length direction of the barrel (10), the additional layer (14) is in an arc structure and the two sides of the additional layer (14) are fixed on the outer side of the barrel (10), the additional layer (14) and the outer side of the barrel (10) form the plug-in channel (13); the lower end or the position close to the lower end of the barrel (10) is provided with an inclined downward guide slot (16), the guide slot (16) is communicated with the sampling hole (11) and the upper end of the guide slot (16) is communicated with the bottom of the plug-in channel (13).
3. The device for sampling deep soil of a paddy field in a water logging period according to claim 1 or 2, characterized by The connecting part (21) of the soil column cutting member (20) is in an arc sheet shape, the cutting shovel (22) is made of flexible metal sheet and the cutting shovel (22) is integrally formed with the connecting part (21); the end of the connecting part (21) away from the cutting shovel (22) is provided with a blocking limiting part (23); the side of the cutting shovel (22) away from the connecting part (21) is matched with the shape of the inner wall of the sampling hole (11).
4. The device for sampling deep soil of a paddy field in a water logging period according to claim 2, characterized by The connecting part (21) is in a rod shape, one side of the cutting shovel (22) is hinged with the connecting part (21), the other side of the cutting shovel (22) is matched with the shape of the inner wall of the sampling hole (11); the end of the connecting part (21) away from the cutting shovel (22) is provided with a fourth handle (24).
5. The device for sampling deep soil of a paddy field in a water logging period according to claim 1 or 2, characterized by The overflow port (12) is at least two and is spaced apart on the barrel (10) along the circumferential direction, each overflow port (12) is composed of a plurality of array holes arranged on the side wall of the barrel (10).
6. The device for sampling deep soil of a paddy field in a water logging period according to claim 4, wherein One end of the push rod (31) is fixed with a second handle (33), the piston push block (32) is located at the end of the push rod (31) away from the second handle (33), and the push rod (31) is vertically fixed to the middle of the piston push block (32); the outer periphery of the piston push block (32) has a thickened flange (34).
7. The device for sampling deep soil of a paddy field in a water logging period according to claim 6, wherein The sampling device further comprises a stirring rod (40), the stirring rod (40) comprising a stirring rod (41), a third handle (43) fixed to one end of the stirring rod (41), and a stirring blade (42) located on the outer circumferential surface of the stirring rod (41), the stirring blade (42) being spirally wound along the circumference of the stirring rod (41).
8. The device for sampling deep soil of a paddy field in a water logging period according to claim 7, wherein The stirring blade (42) extends from one end of the stirring rod (41) with the third handle (43) to the other end; the end of the stirring rod (41) away from the third handle (43) has a guide tip (44).
9. The device for sampling deep soil of a paddy field in a water logging period according to claim 7, wherein The cylinder (10) is made of stainless steel, the push rod (31), the stirring rod (41) and the stirring blade (42) are made of stainless steel or plastic, the piston push block (32) is made of plastic; the first handle (15), the second handle (33), the third handle (43) and the fourth handle (24) are made of metal or plastic.