Plant root system soil sampling equipment

Abstract

The invention discloses plant root system soil sampling equipment, and relates to the technical field of soil sampling, the plant root system soil sampling equipment comprises a driving mechanism, a sampling mechanism and a knocking mechanism, the driving mechanism is arranged at the top of the sampling mechanism, and the knocking mechanism is arranged between the driving mechanism and the sampling mechanism; the sampling mechanism comprises a tapping rotary drum and a sampling inner container, the top of the tapping rotary drum is connected with a transmission shaft of the driving mechanism, the sampling inner container is detachably mounted in the tapping rotary drum, the tapping rotary drum is driven by the driving mechanism to rotate to drill and sample the land, and the tapping rotary drum is impacted by a knocking mechanism in the sampling process; the sampling efficiency is improved, and after sampling is completed, side knocking is carried out, so that the inner container is separated from the perforated rotary drum conveniently, and soil blocks remaining in the perforated rotary drum are separated conveniently; according to the plant root system soil sampling equipment, efficient drilling is achieved, the labor intensity is reduced, operation and maintenance are convenient, and the requirements of various fields for high-quality soil samples can be met.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a plant root soil sampling device. Background Art

[0002] Plant root soil sampling is an important part of research and monitoring in the fields of agriculture, ecology, environmental science, etc. Accurate soil samples can not only help researchers understand soil structure, nutrient status and its relationship with plant growth, but also provide a scientific basis for soil pollution assessment and the formulation of control measures. However, traditional soil sampling methods often have problems such as low efficiency, high labor intensity, and low sample representativeness. Especially when faced with hard soil or root-dense areas, it becomes more difficult to obtain high-quality soil samples.

[0003] Traditional sampling equipment mostly relies on manual or simple mechanical operations, and common tools include shovels and soil drills. These tools rely on human operation to obtain soil samples through digging, drilling, etc. With the development of technology, some automated soil sampling equipment has emerged. This type of equipment uses motor drive to achieve rotary drilling functions, which improves work efficiency to a certain extent. However, traditional sampling equipment has the following defects:

[0004] Difficult drilling and low efficiency: When facing hard soil or areas with dense root systems, traditional manual tools require a lot of manpower and are difficult to drill, while automated equipment lacks effective auxiliary mechanisms, such as vibration or impact, which significantly reduces the drilling speed and prolongs the sampling time. For example, when a shovel is used to dig hard soil, it is laborious to operate and difficult to obtain deep samples; the drill bit of automated equipment is prone to jamming and cannot quickly penetrate the hard soil layer.

[0005] Inconvenient sample removal: After sampling, soil samples tend to adhere to the inner wall of the sampling tube, increasing the workload of manual cleaning. This is because the equipment design does not fully consider the separation of samples from the sampling tube and lacks the corresponding auxiliary separation structure.

[0006] Complex equipment and inconvenient maintenance: The existing automation equipment has a complex structure, which makes its maintenance cost high. The complex structure means more parts and higher technical requirements. Once a failure occurs, it is difficult and expensive to repair, which is not conducive to widespread promotion and use.

[0007] In summary, existing traditional equipment has the problems of difficulty in drilling in hard soil or areas with dense root systems and low sampling efficiency. It also has the disadvantages of being difficult to extract soil samples and having a complex equipment structure and inconvenient maintenance. Summary of the invention

[0008] The purpose of the present invention is to provide a plant root soil sampling device to solve the problems existing in the above-mentioned prior art, achieve efficient drilling, reduce labor intensity, facilitate operation and maintenance, and meet the needs of various fields for high-quality soil samples.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] The present invention provides a plant root soil sampling device, comprising a driving mechanism, a sampling mechanism and a knocking mechanism, wherein the driving mechanism is arranged on the top of the sampling mechanism, and the knocking mechanism is arranged between the driving mechanism and the sampling mechanism;

[0011] The sampling mechanism includes a perforated rotary drum and a sampling liner. The top of the perforated rotary drum is connected to the transmission shaft of the driving mechanism. The sampling liner is detachably installed inside the perforated rotary drum. The perforated rotary drum is driven to rotate by the driving mechanism to drill and sample the land.

[0012] The knocking mechanism includes an impact head and a first spring, the impact head is slidably connected to a fixed sleeve arranged outside the transmission shaft, the first spring is arranged on the top of the impact head and is located between the impact head and the housing of the driving mechanism, the upper end surface of the perforated rotary drum is provided with a guide ramp that slidably cooperates with the bottom of the impact head, the upper end surface of the guide ramp is a slowly rising inclined surface structure, when the driving mechanism drives the perforated rotary drum to rotate, the bottom of the impact head slides along the upper end surface of the guide ramp, gradually moves upward under the guidance of the guide ramp, squeezes the first spring, and when reaching the top edge of the guide ramp, it quickly slides down and hits the perforated rotary drum under the resetting action of the first spring, generates a downward impact force, increases the drilling rate of the sampling mechanism, and moves upward again along the guide ramp after the impact is completed, so that repeated impact can be performed.

[0013] Preferably, the driving mechanism includes a casing, a supporting frame, a driving head, a reducer, a transmission shaft and a fixed sleeve. The driving head is arranged at the top of the casing. The driving head transmits power to the transmission shaft through the reducer inside the casing. The supporting frame is arranged on both sides of the casing. The fixed sleeve is arranged at the bottom of the casing and is sleeved on the outside of the transmission shaft.

[0014] Preferably, a motor and a battery are arranged in the driving head, and a power switch and a charging interface are arranged on the upper end surface of the driving head.

[0015] Preferably, two supporting frames are respectively provided on both sides of the casing, a grip rod is provided between the two supporting frames, the grip rod is provided at one end of the supporting frame away from the casing, and a start-stop button for controlling the start and stop of the driving head is provided on the outer end surface of one of the supporting frames opposite to the grip rod.

[0016] Preferably, a square shaft hole is provided at the bottom of the transmission shaft, a square shaft slidingly matched with the square shaft hole is provided at the top of the perforated rotating cylinder, a butt nut is installed on the top of the perforated rotating cylinder and is rotatably connected with it, an external thread matching with the butt nut is provided at the bottom of the side end surface of the transmission shaft, a fixing flange is provided at the bottom of the casing, an external thread is provided on the outer end surface of the fixing flange, an internal thread matching with the fixing flange is provided at the top of the inner end surface of the fixing sleeve, and the fixing sleeve is threadedly connected to the fixing flange.

[0017] Preferably, the sampling liner is inserted into the perforated drum and slidably connected thereto, and a hexagon socket screw is installed on the side wall of the perforated drum and threadedly connected thereto. After the sampling liner is inserted into the perforated drum, the hexagon socket screw is tightened to squeeze the sampling liner; the bottom of the perforated drum is a serrated structure.

[0018] Preferably, a second slide groove is provided on the side of the fixed sleeve, a sliding block slidably matched with the second slide groove is provided on one side of the top of the impact head, a counterweight block integrally formed with the sliding block is provided on the other side of the top of the impact head, a first positioning groove is provided on the top end surface of the counterweight block, a second positioning groove is provided on the bottom end surface of the casing, and both ends of the first spring are respectively limited in the first positioning groove and the second positioning groove.

[0019] Preferably, an ear plate and a side knock rod are provided on one side of the bottom of the impact head, a rotating shaft rotatably matched with the ear plate is provided on the side knock rod, a first slide groove is provided at the bottom of the impact head, a sliding pressure plate is provided at the top of the side knock rod, the sliding pressure plate is installed in the first slide groove and is slidably connected to the impact head, a second spring is provided between the top of the sliding pressure plate and the groove top of the first slide groove, the side knock rod is elastically connected to the impact head through the second spring, a knocking ball is provided at the bottom of the side knock rod, and the bottom of the sliding pressure plate is in contact with the bottom of the impact head to form a ball top structure.

[0020] Preferably, a ratchet is fixedly mounted on the rotating shaft, a pawl cooperating with the ratchet is arranged on the ear plate, the pawl is rotationally connected to the ear plate via a damping bearing, and a limiting column for limiting the rotation of the pawl is arranged on the side end face of the ear plate.

[0021] Preferably, an arc-shaped guide groove is provided on the upper end surface of the guide ramp, the bottom of the impact head is a spherical top structure that fits the arc-shaped guide groove, and a supporting plate is provided on the top of the perforated rotating cylinder.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] 1) Improve sampling efficiency: The driving mechanism drives the perforated drum to rotate, and the impact head of the knocking mechanism is guided by the guide ramp and repeatedly hits the perforated drum under the action of the first spring, thereby increasing the drilling rate, which is particularly effective in hard or root-dense soil areas. The counterweight of the impact head also enhances the impact kinetic energy.

[0024] 2) Convenient sample handling: The side knock rod cooperates with the impact head to produce longitudinal and transverse double impacts. The longitudinal impact assists drilling during sampling, and the double impact after sampling helps to separate the perforated drum from the sampling liner, discharge residual soil, reduce the workload of manual cleaning, and ensure the integrity and accuracy of sampling.

[0025] 3) Convenient operation and maintenance: With modular design, the sampling mechanism is connected to the transmission shaft through a docking nut and a square shaft, which makes it easy to replace components of different sizes to meet various sampling needs. The arc-shaped guide groove and the bearing plate of the guide ramp improve the stability of the equipment and extend its service life. The start-stop button at the grip makes the operation more flexible and efficient, suitable for field operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the plant root soil sampling device of the present invention;

[0028] Figure 2 A top view of the plant root soil sampling device of the present invention;

[0029] Figure 3 for Figure 2 AA section view;

[0030] Figure 4 for Figure 2 BB section view;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the perforated rotating drum in the present invention;

[0032] Figure 6 for Figure 3 A partial enlarged view of point D in the middle;

[0033] Figure 7 for Figure 4 A partial enlarged view of the F in the middle;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the impact head in the present invention;

[0035] Fig. 9 for Figure 1 A partial enlarged view of point C in the middle;

[0036] Fig.10 for Figure 4 A partial enlarged view of point E in the middle;

[0037] Fig.11 for Figure 8 A partial enlarged view of the G in the middle;

[0038] In the figure: 1, driving mechanism; 101, housing; 1011, second positioning groove; 1012, fixing flange; 102, support frame; 103, grip; 104, start / stop button; 105, driving head; 1051, power switch; 1052, charging interface; 1053, battery; 1054, motor; 106, reducer; 107, transmission shaft; 1071, square shaft hole; 108 fixing sleeve; 1081, second slide groove;

[0039] 2. Sampling mechanism; 201. Opening drum; 2011. Square shaft; 22. Sampling liner; 203. Butt nut; 204. Hexagon socket screw; 205. Guide ramp; 2051. Arc guide groove; 206. Support plate;

[0040] 3. knocking mechanism; 301. impact head; 3011. slider; 3012. counterweight; 3013. first positioning slot; 3014. first slide slot; 3015. ear plate; 3016. ratchet; 3017. limit column; 302. side knocking rod; 3021. sliding pressure plate; 3022. knocking ball; 3023. rotating shaft; 3024. ratchet; 303. first spring; 304. second spring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The purpose of the present invention is to provide a plant root soil sampling device to solve the problems existing in the prior art.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] The plant root soil sampling device in this embodiment is as follows: Figure 1-11 As shown, it includes a driving mechanism 1, a sampling mechanism 2 and a knocking mechanism 3, wherein the driving mechanism 1 is arranged on the top of the sampling mechanism 2, and the knocking mechanism 3 is arranged between the driving mechanism 1 and the sampling mechanism 2;

[0045] The sampling mechanism 2 includes a perforated drum 201 and a sampling liner 22. The top of the perforated drum 201 is connected to the transmission shaft 107 of the driving mechanism 1. The sampling liner 22 is detachably installed inside the perforated drum 201. The perforated drum 201 is driven to rotate by the driving mechanism 1 to drill and sample the land. During the sampling process, the perforated drum 201 is impacted by the knocking mechanism 3 to improve the sampling efficiency. After the sampling is completed, side knocking is performed to facilitate the separation of the liner from the perforated drum 201 and the separation of the remaining soil blocks in the perforated drum 201.

[0046] The knocking mechanism 3 includes an impact head 301 and a first spring 303. The impact head 301 is slidably connected to a fixed sleeve arranged outside the transmission shaft 107. The first spring 303 is arranged at the top of the impact head 301 and is located between the impact head 301 and the housing 101 of the driving mechanism 1. The upper end surface of the perforated rotary cylinder 201 is provided with a guide ramp 205 that slidably cooperates with the bottom of the impact head 301. The upper end surface of the guide ramp 205 is a slowly rising inclined surface structure. When the driving mechanism 1 drives the perforated rotary cylinder 201 to rotate, the bottom of the impact head 301 slides along the upper end surface of the guide ramp 205, and gradually moves upward under the guidance of the guide ramp 205, squeezing the first spring 303, and when reaching the top edge of the guide ramp 205, it quickly slides down and hits the perforated rotary cylinder 201 under the resetting action of the first spring 303, generating a downward impact force, thereby increasing the drilling rate of the sampling mechanism 2, and moving upward again along the guide ramp 205 after the impact is completed, so that repeated impact can be performed.

[0047] In this specific embodiment, the driving mechanism 1 includes a housing 101, a support frame 102, a driving head 105, a reducer 106, a transmission shaft 107 and a fixed sleeve. The driving head 105 is arranged at the top of the housing 101. The driving head 105 transmits power to the transmission shaft 107 through the reducer 106 inside the housing 101. The support frame 102 is arranged on both sides of the housing 101. The fixed sleeve is arranged at the bottom of the housing 101 and sleeved on the outside of the transmission shaft 107. A motor 1054 and a battery 1053 are arranged in the driving head 105, and a power switch 1051 and a charging interface 1052 are arranged on the upper end surface of the driving head 105.

[0048] In this specific embodiment, two supporting frames 102 are respectively provided on both sides of the housing 101, and a grip rod 103 is provided between the two supporting frames 102. The grip rod 103 is provided at one end of the supporting frame 102 away from the housing 101, and a start-stop button 104 for controlling the start and stop of the driving head 105 is provided on the outer end surface of one of the supporting frames 102 opposite to the grip rod 103.

[0049] The motor 1054 is powered by the battery 1053 , and the motor 1054 drives the transmission shaft 107 to rotate through the reducer 106 . The start and stop of the motor 1054 is controlled by the start and stop button 104 , thereby facilitating the operation of the device.

[0050] In this specific embodiment, a square shaft hole 1071 is provided at the bottom of the transmission shaft 107, a square shaft 2011 slidingly matched with the square shaft hole 1071 is provided at the top of the perforated rotating cylinder 201, the docking nut 203 is installed on the top of the perforated rotating cylinder 201 and is rotatably connected thereto, an external thread matching with the docking nut 203 is provided at the bottom of the side end surface of the transmission shaft 107, a fixing flange 1012 is provided at the bottom of the casing 101, an external thread is provided at the outer end surface of the fixing flange 1012, an internal thread matching with the fixing flange 1012 is provided at the top of the inner end surface of the fixing sleeve, and the fixing sleeve is threadedly connected to the fixing flange 1012.

[0051] The transmission shaft 107 is driven by the cooperation of the square shaft 2011 and the square shaft hole 1071, and is fixed to the transmission shaft 107 by the docking nut 203, which is convenient for the installation and disassembly of the sampling mechanism 2, thereby facilitating the replacement of the perforated rotating cylinder 201 of different sizes and ensuring the transmission stability of the equipment. The fixed sleeve is fixedly installed at the bottom of the casing 101.

[0052] In this specific embodiment, the sampling liner 22 is inserted into the perforated rotating drum 201 and is slidably connected thereto, and the hexagon socket screw 204 is installed on the side wall of the perforated rotating drum 201 and is threadedly connected thereto. After the sampling liner 22 is inserted into the perforated rotating drum 201, the hexagon socket screw 204 is tightened to squeeze the sampling liner 22; the bottom of the perforated rotating drum 201 is a serrated structure to facilitate cutting off the root system.

[0053] After the sampling liner 22 is inserted into the perforated drum 201, the sampling liner 22 is squeezed by tightening the hexagon socket screw 204 to fix it. After the sampling is completed, the hexagon socket screw 204 is loosened to take out the sampling liner 22, so that the soil sample is sent for inspection as a whole.

[0054] In this specific embodiment, a second slide groove 108 fixing sleeve; 1081 is provided on the side of the fixing sleeve, and a slider 3011 slidably matched with the second slide groove 108 is provided on one side of the top of the impact head 301, and a counterweight block 3012 integrally formed with the slider 3011 is provided on the other side of the top of the impact head 301, and a first positioning groove 3013 is provided on the top end surface of the counterweight block 3012, and a second positioning groove 1011 is provided on the bottom end surface of the casing 101, and the two ends of the first spring 303 are respectively limited in the first positioning groove 3013 and the second positioning groove 1011.

[0055] The first spring 303 is constrained by the first positioning groove 3013 and the second positioning groove 1011 to prevent the first spring 303 from jumping off during repeated impacts of the impact head 301, thereby improving the stability of the equipment. By arranging a counterweight part on the impact head 301, the kinetic energy of the impact head 301 can be increased, thereby improving the impact effect.

[0056] In this specific embodiment, an ear plate 3015 and a side knock rod 302 are provided on one side of the bottom of the impact head 301, and a rotating shaft 3023 rotatably matched with the ear plate 3015 is provided on the side knock rod 302. A first slide groove 3014 is provided at the bottom of the impact head 301, and a sliding pressure plate 3021 is provided at the top of the side knock rod 302. The sliding pressure plate 3021 is installed in the first slide groove 3014 and is slidably connected to the impact head 301. A second spring 304 is provided between the top of the sliding pressure plate 3021 and the top of the first slide groove 3014. The side knock rod 302 is elastically connected to the impact head 301 through the second spring 304, and a knocking ball 3022 is provided at the bottom of the side knock rod 302. The bottom of the sliding pressure plate 3021 fits with the bottom of the impact head 301 to form a ball top structure.

[0057] When the impact head 301 moves along the guide ramp 205 to the highest point and falls, the sliding pressure plate 3021 on the top of the side knocking rod 302 slides downward under the action of the second spring 304. When the impact head 301 hits the perforated drum 201, it will squeeze the sliding pressure plate 3021 upward to make it rotate upward, and under the action of the lever, the knocking ball 3022 will quickly hit the side wall of the perforated drum 201, generating horizontal vibration, which helps to separate the perforated drum 201 and the sampling liner 22, and at the same time facilitates the discharge of residual soil blocks.

[0058] In this specific embodiment, a ratchet 3024 is fixedly mounted on the rotating shaft 3023, a pawl 3016 cooperating with the ratchet 3024 is provided on the ear plate 3015, the pawl 3016 and the ear plate 3015 are rotationally connected via a damping bearing, and a limiting column 3017 for limiting the rotation of the pawl 3016 is provided on the side end face of the ear plate 3015.

[0059] During the sampling process, the pawl 3016 is stuck on the ratchet 3024, so that the sliding pressure plate 3021 on the top of the side knocking rod 302 cannot rotate downward, and only longitudinal impact is generated during the drill bit sampling process. After the sampling is completed, in order to separate the perforated drum 201 and the sampling liner 22, and to discharge the mud blocks in the perforated drum 201, the pawl 3016 is rotated counterclockwise to release the restriction on the ratchet 3024, and the knocking mechanism 3 knocks the perforated drum 201, generating longitudinal impact and lateral impact. Since the pawl 3016 is connected to the ear plate 3015 through a damping bearing, the pawl 3016 can be fixed to the structure after rotation to prevent its self-rotation from interfering with the ratchet 3024.

[0060] In this specific embodiment, an arc-shaped guide groove 2051 is provided on the upper end surface of the guide ramp 205 , the bottom of the impact head 301 is a spherical top structure that fits the arc-shaped guide groove 2051 , and a supporting plate 206 is provided on the top of the perforated rotating cylinder 201 .

[0061] The arc groove improves the fit between the knocking mechanism 3 and the sampling mechanism 2, thereby improving the stability of the equipment operation. By providing a receiving plate 206 on the top of the sampling mechanism 2, deformation or damage of the perforated drum 201 caused by repeated knocking by the impact mechanism is avoided, thereby improving the service life of the equipment.

[0062] The method of using the plant root soil sampling device of the present invention is as follows:

[0063] First, install the perforated drum 201 and the sampling liner 202, align the square shaft 2011 on the top of the perforated drum 201 with the square shaft hole 1071 at the bottom of the transmission shaft 107, insert and ensure that the two are tightly matched, turn the docking nut 203 to tighten it with the external thread at the bottom of the side end face of the transmission shaft 107, thereby fixing the perforated drum 201 on the transmission shaft 107, insert the sampling liner 202 into the perforated drum 201, and squeeze the sampling liner 202 by tightening the hexagon socket screw 204, thereby fixing the sampling liner 202 in the perforated drum 201. After checking that all parts of the equipment are firmly installed, press the start-stop button 104 on the outer end face of the support frame 102. At this time, the battery 1053 in the driving head 105 supplies power to the motor 1054, and the motor 1054 drives the transmission shaft 107 to rotate through the reducer 106, thereby driving the perforated drum 201 to start rotating. The operator holds the The gripping rod 103 on the inner end surface of the supporting frame 102 aligns the device vertically with the selected sampling point, and slowly applies downward pressure to make the perforating drum 201 gradually drill into the soil. During the process of the perforating drum 201 rotating and drilling, the knocking mechanism 3 begins to play a role. When the driving mechanism 1 drives the perforating drum 201 to rotate, the bottom of the impact head 301 slides along the upper end surface of the guide ramp 205, and gradually moves upward along the second slide groove 1081 under the guidance of the guide ramp 205, squeezing the first spring 303. When the impact head 301 reaches the top edge of the guide ramp 205, it quickly slides down and hits the perforating drum 201 under the reset action of the first spring 303, generating a downward impact force, thereby increasing the drilling rate of the sampling mechanism 2. After the impact is completed, the impact head 301 moves upward again along the guide ramp 205 to perform repeated impacts. According to actual needs, the depth of the perforating drum 201 drilling into the soil is controlled. When the required sampling depth is reached, stop applying downward pressure, press the start / stop button 104, stop the motor 1054, stop the device from working, and pull out the perforated drum 201. Loosen the hexagon socket screw 204 on the side wall of the perforated drum 201, and take out the sampling liner 202 from the perforated drum 201. At this time, the sampling liner 202 contains a complete soil sample, which can be sent to the laboratory for testing and analysis.

[0064] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A plant root soil sampling device, characterized in that: It comprises a driving mechanism, a sampling mechanism and a knocking mechanism, wherein the driving mechanism is arranged on the top of the sampling mechanism, and the knocking mechanism is arranged between the driving mechanism and the sampling mechanism; The sampling mechanism includes a perforated rotary drum and a sampling liner. The top of the perforated rotary drum is connected to the transmission shaft of the driving mechanism. The sampling liner is detachably installed inside the perforated rotary drum. The perforated rotary drum is driven to rotate by the driving mechanism to drill and sample the land. The knocking mechanism includes an impact head and a first spring, the impact head is slidably connected to a fixed sleeve arranged outside the transmission shaft, the first spring is arranged on the top of the impact head and is located between the impact head and the housing of the driving mechanism, the upper end surface of the perforated rotary drum is provided with a guide ramp that slidably cooperates with the bottom of the impact head, the upper end surface of the guide ramp is a slowly rising inclined surface structure, when the driving mechanism drives the perforated rotary drum to rotate, the bottom of the impact head slides along the upper end surface of the guide ramp, gradually moves upward under the guidance of the guide ramp, squeezes the first spring, and when reaching the top edge of the guide ramp, it quickly slides down and hits the perforated rotary drum under the resetting action of the first spring, generates a downward impact force, increases the drilling rate of the sampling mechanism, and moves upward again along the guide ramp after the impact is completed, so that repeated impact can be performed.

2. The plant root soil sampling device according to claim 1, characterized in that: The driving mechanism includes a casing, a supporting frame, a driving head, a reducer, a transmission shaft and a fixed sleeve. The driving head is arranged at the top of the casing. The driving head transmits power to the transmission shaft through the reducer inside the casing. The supporting frame is arranged on both sides of the casing. The fixed sleeve is arranged at the bottom of the casing and is sleeved on the outside of the transmission shaft.

3. The plant root soil sampling device according to claim 2, characterized in that: A motor and a battery are arranged in the driving head, and a power switch and a charging interface are arranged on the upper end surface of the driving head.

4. The plant root soil sampling device according to claim 2, characterized in that: Two supporting frames are respectively arranged on both sides of the casing, a grip rod is arranged between the two supporting frames, and the grip rod is arranged at one end of the supporting frame away from the casing, and a start-stop button for controlling the start and stop of the driving head is arranged on the outer end surface of one of the supporting frames opposite to the grip rod.

5. The plant root soil sampling device according to claim 2, characterized in that: A square shaft hole is provided at the bottom of the transmission shaft, a square shaft slidingly matched with the square shaft hole is provided at the top of the perforated rotating cylinder, a butt nut is installed on the top of the perforated rotating cylinder and is rotatably connected thereto, an external thread matching with the butt nut is provided at the bottom of the side end surface of the transmission shaft, a fixing flange is provided at the bottom of the casing, an external thread is provided at the outer end surface of the fixing flange, an internal thread matching with the fixing flange is provided at the top of the inner end surface of the fixing sleeve, and the fixing sleeve is threadedly connected to the fixing flange.

6. The plant root soil sampling device according to claim 1, characterized in that: The sampling liner is inserted into the perforated rotating drum and is slidably connected thereto, and the hexagon socket screw is installed on the side wall of the perforated rotating drum and is threadedly connected thereto. After the sampling liner is inserted into the perforated rotating drum, the hexagon socket screw is tightened to squeeze the sampling liner; the bottom of the perforated rotating drum is a serrated structure.

7. The plant root soil sampling device according to claim 1, characterized in that: A second slide groove is provided on the side of the fixed sleeve, a sliding block slidably matched with the second slide groove is provided on one side of the top of the impact head, a counterweight block integrally formed with the sliding block is provided on the other side of the top of the impact head, a first positioning groove is provided on the top end surface of the counterweight block, and a second positioning groove is provided on the bottom end surface of the casing, and both ends of the first spring are respectively limited in the first positioning groove and the second positioning groove.

8. The plant root soil sampling device according to claim 1, characterized in that: An ear plate and a side knock rod are provided on one side of the bottom of the impact head, a rotating shaft rotatably matched with the ear plate is provided on the side knock rod, a first slide groove is provided at the bottom of the impact head, a sliding pressure plate is provided at the top of the side knock rod, the sliding pressure plate is installed in the first slide groove and is slidably connected to the impact head, a second spring is provided between the top of the sliding pressure plate and the groove top of the first slide groove, the side knock rod is elastically connected to the impact head through the second spring, a knocking ball is provided at the bottom of the side knock rod, and the bottom of the sliding pressure plate is in contact with the bottom of the impact head to form a ball top structure.

9. The plant root soil sampling device according to claim 8, characterized in that: A ratchet is fixedly mounted on the rotating shaft, a pawl cooperating with the ratchet is arranged on the ear plate, the pawl is rotationally connected to the ear plate via a damping bearing, and a limiting column for limiting the rotation of the pawl is arranged on the side end surface of the ear plate.

10. The plant root soil sampling device according to claim 1, characterized in that: The upper end surface of the guide ramp is provided with an arc-shaped guide groove, the bottom of the impact head is a spherical top structure fitted with the arc-shaped guide groove, and the top of the perforated rotating cylinder is provided with a supporting plate.

Images