Soil detection sampling device and sampling method for rice planting

Abstract

The invention discloses a soil detection sampling device for rice planting and a sampling method, and relates to the technical field of soil sampling, the soil detection sampling device comprises a handle, a connecting frame is fixedly connected to the lower end of the handle, a vertical groove is formed in the side wall of the connecting frame, the soil detection sampling device further comprises a sampling replacement mechanism and a soil cleaning mechanism, gaps are formed in the outer surfaces of the sampling cylinders, a connecting block is fixedly connected between the sampling cylinders, a rotating shaft is fixedly connected to the connecting block in a penetrating manner, the rotating shaft is rotatably connected to the connecting frame in a penetrating manner, and the sampling replacement mechanism is used for replacing a new sampling cylinder to sample soil and can replace the new sampling cylinder to sample after sampling is finished; residual soil is prevented from being mixed into a newly-collected sample, it is guaranteed that the soil sample collected each time is pure and real, accurate data is provided for subsequent detection and analysis, and the detection result can accurately reflect the actual condition of the soil.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, specifically to a soil testing and sampling device and method for rice cultivation. Background Technology

[0002] In the process of rice cultivation, the quality and composition of the soil have a crucial impact on the growth and yield of rice. Accurately understanding various soil indicators, such as pH, fertility, and moisture content, is the foundation for scientific rice cultivation. Therefore, soil testing and sampling has become an indispensable part of the early stage of rice cultivation. Most soil testing and sampling devices commonly found on the market have a relatively simple structure and many shortcomings. On the one hand, after long-term use, soil residue is easily left inside the sampling device. If it is not cleaned in time, it will not only affect the accuracy of subsequent sampling, but also cause corrosion to the sampling device due to the deterioration and decay of the residual soil, thus shortening the service life of the sampling device. On the other hand, existing sampling devices usually only have one sampling device. When the sampling device is damaged or needs to be replaced with a different specification to meet different sampling needs, the replacement process is often cumbersome, requires additional tools, is inconvenient to operate, consumes time and manpower, and reduces sampling efficiency.

[0003] Therefore, this invention proposes a soil testing and sampling device and sampling method for rice cultivation to solve the above problems. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a soil testing and sampling device and method for rice cultivation, which can effectively solve the problems in existing technologies.

[0005] (II) Technical Solution To achieve the above objectives, the present invention can be accomplished through the following technical solutions: A soil testing and sampling device for rice cultivation includes a handle, with a connecting frame fixedly connected to the lower end of the handle. A vertical groove is formed on the side wall of the connecting frame. The device also includes a sampling replacement mechanism and a soil cleaning mechanism. The sampling replacement mechanism includes annularly distributed sampling tubes, each with a notch on its outer surface. A connecting block is fixedly connected between the sampling tubes, and a rotating shaft is fixedly connected through the connecting block. The rotating shaft is rotatably connected to the connecting frame. The sampling replacement mechanism is used to replace the sampling tube with a new one for soil sampling, and the soil cleaning mechanism is used to clean any residual soil inside the sampling tube.

[0006] As a further embodiment of the present invention: a knob is sleeved on one end of the rotating shaft through the connecting frame, and a locking post is fixedly connected to the knob on the side near the connecting frame. The connecting frame is provided with positioning holes at equal intervals in a ring on the side near the locking post. The locking posts are all engaged with the positioning holes. The number of positioning holes is the same as that of the sampling tube.

[0007] As a further aspect of the present invention: a groove is provided on the outer surface of the rotating shaft, and a slider is slidably connected in the groove, the slider being fixedly connected inside the knob.

[0008] As a further aspect of the present invention: a first spring is fixedly connected to the side wall of the slider, and the end of the first spring away from the slider is fixedly connected to the inner side wall of the groove.

[0009] As a further aspect of the present invention: the soil cleaning mechanism includes a ring-shaped distribution of cleaning plates, the number of cleaning plates and sampling cylinders being the same, the cleaning plates being slidably connected to the sampling cylinders, the side walls of the cleaning plates being fixedly connected to fixing plates, the fixing plates being slidably connected to notches, and a second spring being fixedly connected between the cleaning plates and the sampling cylinders.

[0010] As a further embodiment of the present invention: side plates are fixedly connected to both sides of the connecting frame, and horizontal grooves are opened on the upper surface of the side plates. Push plates are slidably connected in the horizontal grooves, and the push plates are all located on the same horizontal line as the fixed plates.

[0011] As a further aspect of the present invention: each of the push plates is rotatably connected to a connecting rod on the side away from the sampling cylinder, and a lifting block is rotatably connected between the two connecting rods on the side away from the push plate. The lifting block is slidably connected in the vertical groove, and a connecting plate is rotatably connected at the center of the side of the lifting block away from the vertical groove. A lever is rotatably connected to the upper end of the connecting plate, and a drive shaft is fixedly connected to the side of the lever away from the connecting plate. The drive shaft is rotatably connected to the handle, and a drive motor is fixedly connected to the end of the drive shaft away from the lever. The drive motor is fixedly connected to the side wall of the connecting frame.

[0012] A soil sampling method for rice cultivation includes the following steps: Step 1: Insert the sampling device vertically into the rice planting soil until the sampling tube reaches the predetermined depth; Step 2: Rotate the sampling device to make the sampling tube rotate in the soil, ensuring that the sampling tube is filled with soil sample; Step 3: Slowly pull out the sampling device, keeping the soil sample inside the sampling tube intact; Step 4: Pour the soil sample collected by the sampling device into the sample container; Step 5: Mark the collected soil samples, noting the sampling location, time, and sample number.

[0013] As a further aspect of the present invention: after step 5, the collected soil samples are dried to ensure that the samples remain stable before testing.

[0014] As a further aspect of the present invention: after step 5, the sampling tube of the sampling device is replaced in preparation for the next sampling operation.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a soil testing and sampling device and method for rice cultivation, which has the following beneficial effects: The sampling replacement mechanism allows for the replacement of sampling tubes after each sampling is completed. This not only prevents residual soil from mixing with newly collected samples, ensuring the purity and authenticity of each soil sample, thus providing accurate data for subsequent testing and analysis and enabling test results to accurately reflect the actual soil conditions, but also allows for convenient replacement of sampling tubes of different specifications or types. It enables flexible selection of appropriate sampling tools based on different soil conditions, testing items, and sampling requirements, meeting diverse sampling needs and improving the adaptability and comprehensiveness of sampling work. Furthermore, it simplifies the sampling tube replacement process, eliminating the need for additional tools, saving replacement time, reducing operational steps and manpower input, and allowing sampling personnel to quickly begin the next sampling operation, accelerating the overall sampling progress.

[0016] The design, featuring a first spring, a locking pin, and a positioning hole, allows staff to precisely control and fix the sampling tube's position when changing it. Once the locking pin engages with the positioning hole, the spring force creates a tight connection between the pin and the hole. This stable fixing method effectively prevents the sampling tube from shaking or rotating during sampling, ensuring smooth operation and improving sampling reliability. Furthermore, the elasticity of the first spring ensures the locking pin remains stable within the positioning hole when no external force is applied. During the rotational operation of changing the sampling tube, the interaction between the locking pin and the positioning hole allows staff to clearly perceive the sampling tube's accurate position, ensuring precise positioning after each change and preventing positional deviations from affecting the sampling effect.

[0017] The soil cleaning mechanism allows for simultaneous cleaning of the sampling tube after each replacement, as the soil sample is ejected from the tube. When sampling different locations or soil types, residual soil from the previous sampling can easily cause cross-contamination. Simultaneous sample ejection and tube cleaning effectively prevents this, ensuring the independence and originality of each sample and allowing test results to more accurately reflect the true soil conditions in different areas. This provides more precise data support for soil research and rice cultivation. Furthermore, timely cleaning of residual soil prevents moisture, salts, and other substances from adhering to the inner wall of the sampling tube for extended periods, avoiding damage due to corrosion and rust. Reducing soil residue also lowers the stress on the internal structure of the sampling tube caused by soil drying, preventing deformation and extending the tube's lifespan while reducing equipment replacement costs.

[0018] The push plate, fixed plate, and second spring work together to drive the cleaning plate to reciprocate within the sampling tube. During this reciprocating motion, the cleaning plate continuously scrapes the inner wall of the sampling tube, which not only removes residual soil more thoroughly and deeply, avoiding dead corners and ensuring the inside of the sampling tube is clean and tidy, thus guaranteeing accurate sampling for the next time, but also provides continuous and stable power for the reciprocating motion of the cleaning plate through the elasticity of the second spring. This ensures that the speed and force of the cleaning plate are relatively uniform during the movement, preventing incomplete cleaning or interruption of the cleaning plate's movement due to insufficient or unstable power. This guarantees the stability and continuity of the cleaning work and effectively improves the cleaning quality. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the connecting frame and the sampling cylinder of the present invention; Figure 3 This is a schematic diagram of the connection structure between the knob and the connecting bracket of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 This is a schematic diagram of the sampling tube connection structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of region B in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram of region C in the middle; Figure 8 This is a schematic diagram of the internal structure of the sampling tube of the present invention; Figure 9 This is a schematic diagram of the connection structure of sampling cylinders and push plates of different lengths according to the present invention.

[0021] In the diagram: 1. Handle; 2. Connecting bracket; 301. Connecting block; 302. Sampling tube; 303. Notch; 304. Knob; 305. Locking post; 306. Positioning hole; 307. Rotating shaft; 308. Slide groove; 309. Sliding block; 310. First spring; 401. Side plate; 402. Horizontal groove; 403. Connecting rod; 404. Connecting plate; 405. Cleaning plate; 406. Fixing plate; 407. Drive motor; 408. Drive shaft; 409. Paddle plate; 410. Push plate; 411. Lifting block; 412. Second spring; 5. Vertical groove. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] This embodiment provides a soil testing and sampling method for rice cultivation, such as... Figure 1 - Figure 9 As shown, the device includes a handle 1, with a connecting frame 2 fixedly connected to the lower end of the handle 1. A vertical groove 5 is provided on the side wall of the connecting frame 2. It also includes a sampling replacement mechanism and a soil cleaning mechanism. The sampling replacement mechanism includes sampling tubes 302 arranged in a ring. Each sampling tube 302 has a notch 303 on its outer surface. A connecting block 301 is fixedly connected between the sampling tubes 302. A rotating shaft 307 is fixedly connected through the connecting block 301. The rotating shaft 307 is rotatably connected to the connecting frame 2. The sampling replacement mechanism is used to replace the sampling tube 302 with a new one to sample the soil.

[0024] In this embodiment, as Figure 4 As shown, a knob 304 is sleeved on one end of the connecting frame 2 through the rotating shaft 307. A locking post 305 is fixedly connected to the knob 304 near the connecting frame 2. The connecting frame 2 has positioning holes 306 equidistantly arranged in a ring on the side near the locking post 305. The locking posts 305 are all engaged with the positioning holes 306. The number of positioning holes 306 is the same as that of the sampling tube 302. By engaging the locking posts 305 with the positioning holes 306, it is not only convenient for the staff to accurately control the rotation angle of the knob 304, but also to fix the position of the knob 304 after it has been rotated.

[0025] In this embodiment, as Figure 4 As shown, a groove 308 is provided on the outer surface of the rotating shaft 307. A slider 309 is slidably connected in the groove 308. The slider 309 is fixedly connected inside the knob 304. When the knob 304 moves horizontally, it can drive the slider 309 to slide synchronously inside the groove 308 and change the position of the knob 304 on the outer surface of the rotating shaft 307. When the knob 304 rotates, it will move the groove 308 through the slider 309, causing the rotating shaft 307 to rotate synchronously.

[0026] In this embodiment, as Figure 4 As shown, a first spring 310 is fixedly connected to the side wall of the slider 309. The end of the first spring 310 away from the slider 309 is fixedly connected to the inner side wall of the groove 308. When the slider 309 slides in the groove 308 under force, it will simultaneously squeeze the first spring 310. When the force on the slider 309 disappears, the rebound force of the first spring 310 can push the slider 309 to move in the opposite direction in the groove 308.

[0027] In existing technologies, most common soil testing sampling devices have a relatively simple structure and several shortcomings. Firstly, after prolonged use, soil residue easily accumulates inside the sampling device. If not cleaned promptly, this not only affects the accuracy of subsequent sampling but also corrodes the device due to soil deterioration and decay, shortening its lifespan. Secondly, existing sampling devices typically consist of only one sampling unit. When this unit is damaged or needs to be replaced with a different size to meet different sampling requirements, the replacement process is often cumbersome, requiring additional tools and is inconvenient to operate, wasting time and manpower, thus reducing sampling efficiency. Compared to existing technologies, this method allows for the replacement of the sampling unit with a new one after sampling is completed. The sampling tube 302 is used for sampling, which not only avoids residual soil from mixing with newly collected samples, ensuring the purity and authenticity of each soil sample collected, thus providing accurate data for subsequent testing and analysis, and enabling the test results to accurately reflect the actual soil conditions, but also allows for convenient replacement of sampling tubes 302 of different specifications or types. It can flexibly select appropriate sampling tools according to different soil conditions, testing items and sampling requirements, meet diverse sampling needs, improve the adaptability and comprehensiveness of sampling work, and simplify the sampling tube 302 replacement process. No additional tools are needed, saving replacement time, reducing operation steps and manpower input, and enabling sampling personnel to start the next sampling work more quickly, thus speeding up the overall sampling progress.

[0028] At other levels, this embodiment also provides a soil cleaning mechanism for cleaning residual soil inside the sampling tube 302, such as... Figure 1 - Figure 9As shown, the soil cleaning mechanism includes a ring of cleaning plates 405. The number of cleaning plates 405 and sampling tubes 302 is the same. The cleaning plates 405 are all slidably connected to the sampling tubes 302. Fixing plates 406 are fixedly connected to the side walls of the cleaning plates 405. The fixing plates 406 are all slidably connected to the notches 303. A second spring 412 is fixedly connected between the cleaning plates 405 and the sampling tubes 302.

[0029] In this embodiment, as Figure 6 As shown, side plates 401 are fixedly connected to both sides of the connecting frame 2. A horizontal groove 402 is opened on the upper surface of the side plate 401. A push plate 410 is slidably connected in the horizontal groove 402. The push plate 410 and the fixed plate 406 are located on the same horizontal line. When the push plate 410 slides close to the fixed plate 406 in the horizontal groove 402 opened on the upper surface of the side plate 401, it will push the fixed plate 406 to move horizontally synchronously inside the notch 303.

[0030] In this embodiment, as Figure 5 - Figure 7 As shown, each of the push plates 410 is rotatably connected to a connecting rod 403 on the side away from the sampling cylinder 302. A lifting block 411 is rotatably connected between the two connecting rods 403 on the side away from the push plate 410. The lifting block 411 is slidably connected in the vertical groove 5. A connecting plate 404 is rotatably connected to the center of the lifting block 411 on the side away from the vertical groove 5. A lever 409 is rotatably connected to the upper end of the connecting plate 404. A drive shaft 408 is fixedly connected to the side of the lever 409 away from the connecting plate 404. The drive shaft 408 is rotatably connected to the handle 1. The end of the drive shaft 408 away from the lever 409 is fixedly connected to... There is a drive motor 407, which is fixedly connected to the side wall of the connecting frame 2. When the drive motor 407 is turned on and drives the drive shaft 408 to rotate, the lifting block 411 can be pushed to slide up and down in the vertical groove 5 through the dial plate 409 connected to the drive shaft 408 and the connecting plate 404 rotatably connected to the dial plate 409. At this time, as the lifting block 411 moves up and down, the lifting block 411 will push the push plate 410 to move horizontally back and forth in the horizontal groove 402 opened on the upper end face of the side plate 401 through the connecting rod 403 symmetrically rotatably connected to the side wall.

[0031] Compared with existing technologies, this method allows for simultaneous removal of soil samples from the sampling tube 302 after replacement, while also cleaning the inside of the tube. When sampling different locations or different types of soil, residual soil from the previous sampling can easily cause cross-contamination. Simultaneous removal of samples and cleaning of the sampling tube 302 effectively avoids this, ensuring the independence and originality of each sample and making the test results more accurately reflect the true condition of the soil in different areas, providing more precise data support for soil research and rice cultivation. Furthermore, timely cleaning of residual soil inside the sampling tube 302 prevents moisture, salts, and other substances from adhering to the inner wall of the tube for extended periods, avoiding damage due to corrosion and rust. Reducing soil residue also lowers the stress on the internal structure of the sampling tube 302 caused by soil drying, preventing deformation and extending its service life, thus reducing equipment replacement costs.

[0032] At other levels, this embodiment also provides a soil testing and sampling method for rice cultivation, such as... Figure 1 - Figure 9 As shown, it includes the following steps: Step 1: Insert the sampling device vertically into the rice planting soil until the sampling tube reaches the predetermined depth; Step 2: Rotate the sampling device to make the sampling tube rotate in the soil, ensuring that the sampling tube is filled with soil sample; Step 3: Slowly pull out the sampling device, keeping the soil sample inside the sampling tube intact; Step 4: Pour the soil sample collected by the sampling device into the sample container; Step 5: Mark the collected soil samples, noting the sampling location, time, and sample number.

[0033] In this embodiment, after step 5, the collected soil samples are dried to ensure that the samples remain stable before testing.

[0034] In this embodiment, after step 5, the sampling tube of the sampling device is replaced in preparation for the next sampling operation.

[0035] The overall working process and principles involved in the above embodiments are as follows: It should be noted that the sampling tube 302 can be replaced with sampling tubes 302 of different specifications. Furthermore, after replacing the sampling tube 302 with different lengths, the cleaning plate 405 inside the sampling tube 302 will also be located in different positions. In this case, the shorter the sampling tube 302, the farther the cleaning plate 405 and the fixing plate 406 will be from the push plate 410. The push plate 410 can still push the fixing plate 406 to drive the cleaning plate 405 to clean the inside of the sampling tube 302. Figure 9 As shown; When staff need to sample and test the soil in rice fields, they first take the handle 1 and move the sampling tube 302 to the sampling area. Then, they press down the handle 1 so that the sampling tube 302 is vertically inserted into the soil to the specified depth. Then, they rotate the handle 1, which, through the connecting frame 2, the rotating shaft 307, and the connecting block 301, causes the sampling tube 302 to rotate inside the soil and divide the soil. After the division is completed, the handle 1 can be lifted upwards, and the sampling tube 302 carrying the soil sample will rise out of the soil through the connecting frame 2, the rotating shaft 307, and the connecting block 301. After the sample is removed from the soil using the sampling tube 302, the operator can press down on the fixing plate 406, pushing it to slide within the notch 303 on the side wall of the sampling tube 302. This causes the cleaning plate 405 to move inside the sampling tube 302, simultaneously pulling the second spring 412 connecting the cleaning plate 405 and the sampling tube 302. This causes the cleaning plate 405 to push out the soil sample from inside the sampling tube 302, cleaning the inside of the sampling tube 302. When sampling at different locations or with different soil types, if soil from the previous sampling remains in the sampling tube 302, it can easily cause cross-contamination between samples. Simultaneously pushing out the sample and cleaning the sampling tube is crucial. Sampling tube 302 not only effectively avoids this situation, ensuring the independence and originality of each sample and making the test results more accurately reflect the true condition of the soil in different areas, providing more precise data support for soil research and rice cultivation, but also timely cleaning of residual soil inside sampling tube 302 can prevent moisture, salt and other substances in the soil from adhering to the inner wall of sampling tube 302 for a long time, avoiding damage to sampling tube 302 due to corrosion and rust. At the same time, reducing soil residue can also reduce the stress on the internal structure of sampling tube 302 caused by soil drying, preventing the sampling tube 302 from deforming, thereby extending the service life of sampling tube 302 and reducing equipment replacement costs; After the sampling tube 302 at the bottom is used, the operator can pull the knob 304 horizontally. The knob 304 is slidably connected to the slider 309 inside the knob 304 and the groove 308 on the outer surface of the rotating shaft 307. This allows the knob 304 to slide horizontally away from the connecting frame 2 on the outer surface of the rotating shaft 307, causing the slider 309 to slide within the groove 308. This causes the slider 309 to compress the first spring 310 connected inside the groove 308. Because the knob 304 is close to the connecting frame... A locking post 305 is connected to one side of the frame 2. The locking post 305 and the positioning hole 306 on the side wall of the connecting frame 2 are engaged with each other. Therefore, as the knob 304 moves horizontally away from the connecting frame 2, it can drive the locking post 305 to move horizontally in sync, so that the locking post 305 slides out of the positioning hole 306 on the connecting frame 2. After the locking post 305 and the positioning hole 306 are completely separated, the operator can rotate the knob 304, which moves the slide groove 308 through the slider 309, driving the rotating shaft 307 to move in the connecting frame 2. The shaft 307 rotates on the receiving frame 2. As the shaft 307 rotates, the connecting block 301 is fixedly connected to the outer surface of the shaft 307, and sampling tubes 302 are fixedly connected to all four sides of the connecting block 301. Therefore, the shaft 307 will drive the sampling tubes 302 to rotate through the connecting block 301. A new sampling tube 302 is then used for sampling. This not only avoids residual soil from mixing into the newly collected sample, ensuring that each collected soil sample is pure and authentic, thus providing accurate data for subsequent testing and analysis, and enabling the test results to accurately reflect the actual soil condition, but also allows for convenient replacement of sampling tubes 302 of different specifications or types. It allows for flexible selection of appropriate sampling tools according to different soil conditions, testing items, and sampling requirements, meeting diverse sampling needs, improving the adaptability and comprehensiveness of sampling work, and simplifying the sampling tube 302 replacement process. No additional tools are needed, saving replacement time, reducing operation steps and manpower input, and enabling sampling personnel to start the next sampling work more quickly, thus accelerating the overall sampling progress. After the new sampling tube 302 is replaced, the operator can release the knob 304. The rebound force of the first spring 310 will push the slider 309 to slide in the opposite direction on the outer surface of the groove 308, causing the knob 304 to move horizontally towards the connecting frame 2 on the outer surface of the rotating shaft 307. At this time, the locking pin 305, fixedly connected to the side wall of the connecting frame 2, will again engage with the positioning hole 306 on the connecting frame 2, fixing the positions of the knob 304 and the rotating shaft 307. This allows the operator to precisely control and fix the position of the sampling tube 302 when replacing it. After the locking pin 305 engages with the positioning hole 306, the first spring 310... Under the elastic force, the locking post 305 and the positioning hole 306 form a tight locking structure. This stable fixing method can not only effectively prevent the sampling tube 302 from shaking or rotating due to force during the sampling process, ensuring the smooth progress of the sampling work and improving the reliability of the sampling, but also the elastic action of the first spring 310 can make the locking post 305 stably located in the positioning hole 306 when there is no external force. During the rotation operation of changing the sampling tube 302, the cooperation between the locking post 305 and the positioning hole 306 can make the staff clearly perceive that the sampling tube 302 has reached the accurate position, ensuring that the sampling tube 302 can be accurately positioned after each replacement, avoiding the impact of position deviation on the sampling effect. When the sampling tube 302 is rotated to a horizontal position after use, the operator can turn on the drive motor 407, which will drive the drive shaft 408 to rotate on the handle 1. Since a lever 409 is fixedly connected to the end of the drive shaft 408 away from the drive motor 407, and a connecting plate 404 is rotatably connected to the side of the lever 409 away from the drive motor 407, and the connecting plate 404 is rotatably connected to the side wall of the lifting block 411, as the drive shaft 408 rotates, it will drive the lever 409 to rotate synchronously. This causes the lever 409 to push the upper end of the connecting plate 404 to move synchronously around the drive shaft 408. As the upper end of the connecting plate 404 moves, the position of the upper end of the connecting plate 404 will also change. As the connection plate 404 changes, it pushes the lifting block 411 to move up and down synchronously within the vertical groove 5. During the up and down reciprocating motion of the lifting block 411, the lifting block 411 is symmetrically connected to the connecting rod 403 on the side away from the connecting frame 2. The connecting rod 403 on the side away from the lifting block 411 is rotatably connected to the push plate 410. Therefore, as the lifting block 411 moves up and down, it pushes the push plate 410 back and forth horizontally within the horizontal groove 402 on the upper surface of the side plate 401 via the connecting rod 403. When the push plate 410 moves horizontally away from the connecting frame 2 on the upper surface of the side plate 401, it gradually approaches the fixed connection on the outer surface of the sampling cylinder 302. After the push plate 410 contacts the fixed plate 406, as the push plate 410 continues to move, it pushes the fixed plate 406 to slide within the notch 303, causing the cleaning plate 405 connected to the side wall of the fixed plate 406 to move synchronously, cleaning the inside of the sampling cylinder 302. At the same time, it pulls the second spring 412 connected between the cleaning plate 405 and the sampling cylinder 302. When the push plate 410 moves in the opposite direction and approaches the connecting frame 2, the pushing force on the fixed plate 406 disappears. Through the rebound force of the second spring 412, the cleaning plate 405 and the fixed plate 406 are pulled back to their initial positions. This process repeats, through the cooperation of the push plate 410 and the second spring 412. This mechanism enables the cleaning plate 405 to reciprocate within the sampling tube 302. During this reciprocating motion, the cleaning plate 405 continuously scrapes the inner wall of the sampling tube 302, which not only removes residual soil more thoroughly and deeply, avoiding cleaning dead spots and ensuring that the inside of the sampling tube 302 is clean and tidy, thus providing a guarantee for accurate sampling next time, but also the elasticity of the second spring 412 provides continuous and stable power for the reciprocating motion of the cleaning plate 405. This ensures that the speed and force of the cleaning plate 405 are relatively uniform during the movement, preventing incomplete cleaning or interruption of the cleaning plate 405's movement due to insufficient or unstable power. This guarantees the stability and continuity of the cleaning work and effectively improves the cleaning quality.

[0036] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A soil testing and sampling device for rice cultivation, comprising a handle (1), wherein a connecting frame (2) is fixedly connected to the lower end of the handle (1), and a vertical groove (5) is provided on the side wall of the connecting frame (2), characterized in that, It also includes sampling and replacement mechanisms and soil cleaning mechanisms; The sampling replacement mechanism includes a ring-shaped sampling tube (302), each sampling tube (302) having a notch (303) on its outer surface. A connecting block (301) is fixedly connected between the sampling tubes (302), and a rotating shaft (307) is fixedly connected through the connecting block (301). The rotating shaft (307) is rotatably connected through the connecting frame (2). The sampling replacement mechanism is used to replace the new sampling tube (302) to sample the soil. The soil cleaning mechanism is used to clean the soil remaining inside the sampling tube (302).

2. The soil testing and sampling device for rice cultivation according to claim 1, characterized in that, The rotating shaft (307) passes through the connecting frame (2) and a knob (304) is sleeved on one end. The knob (304) is fixedly connected to a locking post (305) on the side near the connecting frame (2). The connecting frame (2) is provided with positioning holes (306) at equal intervals in a ring on the side near the locking post (305). The locking posts (305) are all engaged with the positioning holes (306). The number of positioning holes (306) is the same as that of the sampling tube (302).

3. The soil testing and sampling device for rice cultivation according to claim 2, characterized in that, The outer surface of the rotating shaft (307) is provided with a groove (308), and a slider (309) is slidably connected in the groove (308). The slider (309) is fixedly connected to the inside of the knob (304).

4. A soil testing and sampling device for rice cultivation according to claim 3, characterized in that, A first spring (310) is fixedly connected to the side wall of the slider (309), and the end of the first spring (310) away from the slider (309) is fixedly connected to the inner side wall of the groove (308).

5. A soil testing and sampling device for rice cultivation according to claim 1, characterized in that, The soil cleaning mechanism includes a ring of cleaning plates (405), the number of which is the same as that of the sampling tubes (302). The cleaning plates (405) are all slidably connected inside the sampling tubes (302). Fixing plates (406) are fixedly connected to the side walls of the cleaning plates (405). The fixing plates (406) are all slidably connected inside the notches (303). A second spring (412) is fixedly connected between the cleaning plates (405) and the sampling tubes (302).

6. A soil testing and sampling device for rice cultivation according to claim 5, characterized in that, The connecting frame (2) has side plates (401) fixedly connected to both sides. The upper surface of the side plates (401) is provided with horizontal grooves (402). Push plates (410) are slidably connected in the horizontal grooves (402). The push plates (410) and the fixed plate (406) are located on the same horizontal line.

7. A soil testing and sampling device for rice cultivation according to claim 6, characterized in that, The push plate (410) is rotatably connected to a connecting rod (403) on the side away from the sampling tube (302). A lifting block (411) is rotatably connected between the two connecting rods (403) on the side away from the push plate (410). The lifting block (411) is slidably connected in the vertical groove (5). A connecting plate (404) is rotatably connected at the center of the side of the lifting block (411) away from the vertical groove (5). A lever (409) is rotatably connected to the upper end of the connecting plate (404). A drive shaft (408) is fixedly connected to the side of the lever (409) away from the connecting plate (404). The drive shaft (408) is rotatably connected through the handle (1). A drive motor (407) is fixedly connected to the end of the drive shaft (408) away from the lever (409). The drive motor (407) is fixedly connected to the side wall of the connecting frame (2).

8. A soil testing and sampling method for rice cultivation, said sampling method being based on a soil testing and sampling device for rice cultivation according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Insert the sampling device vertically into the rice planting soil until the sampling tube reaches the predetermined depth; Step 2: Rotate the sampling device to make the sampling tube rotate in the soil, ensuring that the sampling tube is filled with soil sample; Step 3: Slowly pull out the sampling device, keeping the soil sample inside the sampling tube intact; Step 4: Pour the soil sample collected by the sampling device into the sample container; Step 5: Mark the collected soil samples, noting the sampling location, time, and sample number.

9. A soil testing and sampling method for rice cultivation according to claim 8, characterized in that, After step 5, the collected soil samples are dried to ensure that the samples remain stable before testing.

10. A soil testing and sampling method for rice cultivation according to claim 8, characterized in that, After step 5, the sampling tube of the sampling device is replaced in preparation for the next sampling operation.

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