Modular soil sampling device

Abstract

The application provides a modular soil sampling device, comprising: a manual pressing rod for gripping and pressing down, a connecting part arranged at the lower end of the manual pressing rod, a sampling rod arranged at the lower end of the connecting part, a sampling cylinder connected with the lower end of the sampling rod, and a cutting head detachably connected with the bottom of the sampling cylinder; the connecting part is detachably connected with the manual pressing rod; the sampling rod is detachably connected with the connecting part, and the lower end of the sampling rod is provided with a connecting assembly and a locking assembly; the sampling cylinder is open at both ends to form a hollow soil storage cavity, the upper end of the sampling cylinder is connected with the lower end of the sampling rod through the connecting assembly, and the relative position of the sampling cylinder and the sampling rod in the vertical direction is locked by the locking assembly; and a soil inlet communicating with the soil storage cavity of the sampling cylinder is vertically arranged in the middle of the cutting head. The modular soil sampling device of the application realizes the detachable connection of the manual pressing rod, the connecting part, the sampling rod, the sampling cylinder and the cutting head component through modular design, and meets different requirements of soil sampling.

Description

Technical Field

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

[0002] Soil profile sampling is a crucial step in soil research, especially in analyzing soil hydrological characteristics, nutrient content, and pollutant distribution. Accurate soil profile sampling is essential.

[0003] However, existing sampling tools are usually designed in a fixed way and cannot flexibly cope with different soil hardness, depth and different sampling needs. This makes them easy to get stuck in hard soil or deep soil, resulting in low sampling efficiency, poor sampling effect and failure to complete effective sampling. Utility Model Content

[0004] The purpose of this application is to solve the above-mentioned problems and provide a detachable and replaceable modular soil sampling device.

[0005] To achieve the above objectives, this utility model provides a modular soil sampling device, comprising: a manual pressure rod, a connecting part disposed at the lower end of the manual pressure rod, a sampling rod disposed at the lower end of the connecting part, a sampling cylinder connected to the lower end of the sampling rod, and a cutting head detachably connected to the bottom of the sampling cylinder; the manual pressure rod is used for gripping and pressing down; the connecting part is detachably connected to the manual pressure rod; the sampling rod is detachably connected to the connecting part, and the lower end of the sampling rod is provided with a connecting component and a locking component; the sampling cylinder has openings at both ends to form a hollow soil storage cavity, the upper end of the sampling cylinder is connected to the lower end of the sampling rod through the connecting component, and its relative position with the sampling rod in the vertical direction is locked by the locking component; the middle of the cutting head has a vertically penetrating soil inlet communicating with the soil storage cavity of the sampling cylinder.

[0006] Compared to existing technologies, this modular soil sampling device, through its modular design, allows for the detachable connection of the manual pressure rod, connecting part, sampling rod, sampling cylinder, and cutting head components. Modules can be replaced according to different soil hardness, depth, and sampling requirements, facilitating operation and matching current soil sampling needs. Furthermore, after module replacement, the modular soil sampling device can be stably assembled, providing the stable power required for soil sampling and ensuring the necessary sampling accuracy, high efficiency, and good sample quality. The modular design also enables convenient cleaning and maintenance.

[0007] In one embodiment, the connecting component is a metal tube integrally formed with the sampling rod, and the metal tube has a plurality of through holes arranged at predetermined intervals along the vertical direction; the locking component is a locking screw, and the upper end of the sampling tube has a plurality of screw holes circumferentially arranged, and the locking screw passes through any one or more through holes and locks with the screw hole at the upper end of the sampling tube. By aligning the through holes on the metal tube with the screw holes on the sampling tube, the locking screw fixes the relative position of the two, realizing a depth-adjustable connection, allowing adjustment of the insertion depth of the sampling tube, adapting to sampling of different soil layers, and improving sampling flexibility and accuracy.

[0008] In one embodiment, the connecting component is an elastic metal hoop with an elastic opening on one side, and the locking component is a locking screw. The locking component is located at the elastic opening and is used to tighten or loosen the elastic opening to adjust the inner diameter of the elastic metal hoop. The inner diameter of the elastic metal hoop is adjusted by the locking screw to clamp or loosen the sampling tube, achieving quick connection and fixation. This method of connection is fast and firm, meeting the needs of frequent sampling tube replacement, improving operational efficiency, and matching the needs of different soil sampling methods.

[0009] In one embodiment, an observation groove extending vertically is provided on the other side of the elastic metal hoop, and a length indicator is provided on at least one side of the observation groove. The upper end of the sampling tube is inserted into the elastic metal hoop and locked in place by the locking screw. The insertion length of the sampling tube can be observed from the observation groove. Through the observation groove and the length indicator, the user can directly read the insertion depth of the sampling tube, ensuring accurate sampling position, improving the accuracy and visibility of sampling depth control, reducing errors, and meeting the needs for precise stratified sampling.

[0010] In one embodiment, the connecting part includes a first housing and a first sampling rod drive unit disposed within the first housing. The first sampling rod drive unit includes a first hydraulic pump for outputting power, a first directional valve, a first oil tank, and a hydraulic motor for rotating the sampling rod. The oil inlet of the first hydraulic pump is connected to the first oil tank through a first pipe, and the oil outlet of the first hydraulic pump is connected to the oil inlet of the first directional valve through a first pipe. The two working oil ports of the first directional valve are respectively connected to the two working oil ports of the hydraulic motor through a first pipe. The oil return port of the first directional valve is connected to the first oil tank through an oil pipe. The upper end of the sampling rod is rotatably disposed within the first housing, and the output end of the hydraulic motor is drivenly connected to the upper end of the sampling rod. The sampling rod is driven to rotate by the first sampling rod drive unit, the first hydraulic pump provides pressurized oil, the first reversing valve controls the direction of the oil circuit, and the hydraulic motor converts hydraulic energy into mechanical rotational motion, which drives the sampling rod and sampling cylinder to rotate and cut into the soil. The hydraulic drive provides stable rotational power, which can quickly and economically understand the chemical composition or macroscopic stratification of the soil. It can achieve the sampling effect in hard soil, improve sampling efficiency and increase sampling depth, and reduce manual labor intensity.

[0011] In one embodiment, the first sampling rod drive unit further includes a hydraulic chuck, a chuck control directional valve for controlling the clamping mechanism to clamp or release, and a two-way hydraulic lock. The hydraulic chuck includes a chuck body and a clamping mechanism. The output shaft of the hydraulic motor is fixedly connected to the chuck body. The clamping mechanism is used to clamp or release the top end of the sampling rod. The oil outlet of the first hydraulic pump is also connected to the oil inlet of the chuck control directional valve through a third pipe. The working oil port of the chuck control directional valve is connected to the clamping mechanism through a third pipe. The two-way hydraulic lock is disposed on the connecting oil line and is used to hydraulically lock the clamping mechanism. The oil return port of the chuck control directional valve is connected to the first oil tank. By setting the hydraulic chuck, the sampling rod can be quickly clamped and released, improving operational safety and efficiency. The two-way hydraulic lock ensures that it will not be accidentally released during sampling, and the sampling rod and the connecting part can be detachably connected, facilitating the user to replace the module.

[0012] In one embodiment, the connecting part includes a second housing and a second sampling rod drive unit disposed within the second housing. The second sampling rod drive unit includes a second hydraulic pump for outputting power, a second directional valve, a hydraulic cylinder for providing downward pressure to the sampling rod, a second oil tank, and a movable frame. The oil inlet of the second hydraulic pump is connected to the second oil tank via a second pipe, and the oil outlet of the second hydraulic pump is connected to the oil inlet of the second directional valve via a second pipe. The two working oil ports of the second directional valve are respectively connected to the rodless chamber and the rod chamber of the hydraulic cylinder via second pipes. The oil return port of the second directional valve is connected to the second oil tank via a second pipe. The end of the piston rod of the hydraulic cylinder is connected to the movable frame to push the movable frame to perform vertical linear movement. The upper end of the sampling rod extends into the second housing and is detachably connected to the movable frame. The pressure difference between the rod-side and rodless-side chambers of the hydraulic cylinder provides a vertical downward pressure on the piston rod, pushing the movable frame and sampling rod downwards. The second hydraulic pump and the second directional valve control the direction of the oil circuit, achieving downward pressure and upward retraction. The hydraulic downward pressure is large and stable, enabling effective sampling in cohesive soils and soils with high water content, improving the sampling success rate. It preserves the soil's original state as much as possible, without damaging the natural structure, density, water content, and stratification of the sampled soil, thus improving sampling efficiency, increasing sampling depth, and reducing manual labor intensity.

[0013] In one embodiment, the second sampling rod drive unit further includes a shut-off valve. The shut-off valve is located on a second pipe connecting the second directional valve and the rodless chamber of the hydraulic cylinder. The control port of the shut-off valve is connected to the working oil circuit connecting the second directional valve and the rod chamber of the hydraulic cylinder. By providing the shut-off valve, the safety and stability of the device are improved, preventing the sampling rod from retracting during sampling, and providing a stable downward pressure when locked, ensuring sampling depth and sample integrity.

[0014] In one embodiment, a soil recovery device is also included. The soil recovery device includes a sampling tube fixing device, a push rod, a motor, and a collection container. The sampling tube fixing device is used to fix the sampling tube. The push rod is disposed on the sampling tube fixing device and driven by the motor. It is used to extend into the sampling tube and push out the soil sample in the sampling tube. The collection container is disposed in the pushing direction of the push rod and is used to collect the soil sample pushed out from the sampling tube.

[0015] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of a structure for locking the sampling tube in a modular soil sampling device; Figure 2 A schematic diagram of another angle of the modular soil sampling device for locking the sampling tube; Figure 3 This is a schematic diagram of another structure for locking the sampling tube in a modular soil sampling device. Figure 4 This is a structural diagram of another sampling cylinder used for locking the sampling cylinder in a modular soil sampling device; Figure 5 Perspective view of the sampling tube and cutting blade; Figure 6 A perspective view of a connecting part and a sampling rod; Figure 7 A perspective view of another type of connector and sampling rod; As shown in the figure, the components include: manual pressure rod 110, connecting part 120, sampling rod 130, sampling cylinder 140, cutting head 150, connecting assembly 131, locking assembly 132, soil storage chamber 141, soil inlet 151, metal pipe 1311, through hole 1312, screw hole 141, elastic opening 1313, elastic metal clamp 1314, observation slot 1315, length marker 1316, first housing 121, first sampling rod drive part 122, first hydraulic pump 1221, first reversing valve 1222, first oil tank 1223, and hydraulic motor 1224. The components include: first pipe 1225, hydraulic chuck 1226, chuck control directional valve 1227, two-way lock-up valve 1228, third pipe 1229, chuck body 12261, clamping mechanism 12262, second housing 123, second sampling rod drive unit 124, second hydraulic pump 1241, second directional valve 1242, hydraulic cylinder 1243, second oil tank 1244, movable frame 1245, second pipe 1246, shut-off valve 1247, soil recovery device 160, sampling cylinder fixing device 161, push rod 162, motor 163, and collection container 164. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. It is understood that the drawings are provided for reference and illustration only and are not intended to limit this application. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. Furthermore, unless otherwise stated, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] It should be noted that when a component is considered to "connect" or "install" another component, it can be a direct connection, installation to another component, or an intervening component may be present simultaneously. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In the description of this utility model, unless otherwise expressly specified and limited, the terms "install," "connect," "link," and "fix" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection, or to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.

[0021] In the description of this utility model, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] This utility model provides a modular soil sampling device. Specifically, the modular soil sampling device includes: a manual pressure rod 110, a connecting part 120 disposed at the lower end of the manual pressure rod 110, a sampling rod 130 disposed at the lower end of the connecting part 120, a sampling cylinder 140 connected to the lower end of the sampling rod 130, and a cutting head 150 detachably connected to the bottom of the sampling cylinder 140.

[0023] The manual pressure lever 110 is used for gripping and pressing down; the connecting part 120 is detachably connected to the manual pressure lever 110; the sampling rod 130 is detachably connected to the connecting part 120, and the lower end of the sampling rod 130 is provided with a connecting component 131 and a locking component 132; the sampling cylinder 140 is open at both ends to form a hollow soil storage cavity, the upper end of the sampling cylinder 140 is connected to the lower end of the sampling rod 130 through the connecting component 131, and the locking component 132 locks its relative position with the sampling rod 130 in the vertical direction; the cutting head 150 has a soil inlet 151 that is vertically penetrating through the middle and communicates with the soil storage cavity of the sampling cylinder 140.

[0024] The user replaces the corresponding modules of the modular soil sampling device according to the current soil sampling requirements. Based on the soil hardness, sampling depth, and sampling needs, the corresponding connecting part 120, sampling rod 130, sampling cylinder 140, and cutting head 150 are replaced. After replacement, the entire device is assembled. The user grasps the assembled modular soil sampling device, places it on the soil, and presses down to collect the sample. The soil is continuously pressed and cut by the cutting head 150, entering the soil storage chamber of the sampling cylinder 140 through the soil inlet 151 of the cutting head 150, thus completing the sampling.

[0025] Through modular design, the manual pressure rod 110, connecting part 120, sampling rod 130, sampling cylinder 140, and cutting head 150 are detachably connected to each other. Modules can be replaced according to different soil hardness, depth, and sampling requirements, facilitating operation and matching current soil sampling needs. Simultaneously, after module replacement, the modular soil sampling device can be stably assembled, providing the stable power required for soil sampling, ensuring good sampling accuracy, high sampling efficiency, and good sample quality. Furthermore, the modular design allows for convenient cleaning and maintenance of the modular soil sampling device.

[0026] The following provides a detailed description of the specific structure of each component within the modular soil sampling device.

[0027] The manual pressure lever 110 is used by the user to grip and press down, and is the main component for user operation.

[0028] The manual pressure lever 110 is used for gripping and pressing down. The user grips the manual pressure lever 110 with both hands and places it on the soil. The user applies downward pressure, which is transmitted to the sampling rod 130 and sampling cylinder 140 through the connecting part 120, causing the sampling cylinder 140 to insert into the soil to complete the sampling. The user grips and applies downward pressure, driving the entire device to perform soil sampling. By setting the manual pressure lever 110, the user can operate the device easily, providing initial downward pressure to drive the sampling rod 130 downward and the sampling cylinder 140 into the soil.

[0029] The manual pressure lever 110 is made of a lightweight, high-strength material, such as aluminum alloy or engineering plastic. In other embodiments, the surface of the manual pressure lever 110 may be provided with anti-slip texture to improve operating comfort and stability.

[0030] The connecting part 120 is used to connect the transition manual pressure rod 110 and the sampling rod 130 to provide power for soil sampling.

[0031] The connecting part 120 is located at the lower end of the manual pressure rod 110 and is detachably connected to it. When the manual pressure rod 110 receives initial downward pressure from the user, this pressure is transmitted to the connecting part 120, which then connects to the sampling rod 130, ensuring smooth force transmission from the manual pressure rod 110 to the sampling rod 130. The detachable design of the connecting part 120 improves the flexibility and ease of maintenance of the device, enabling force transmission and modular connection. It allows users to quickly disassemble and replace the sampling rod 130 with different functions, and users can replace the connecting part 120 with different specifications according to sampling needs, soil hardness, and soil depth.

[0032] The connecting part 120 is detachably connected to the manual pressure rod 110. In one embodiment, it may be a threaded connection. In other embodiments, it may be a snap-fit ​​connection.

[0033] In one embodiment, the connecting part 120 includes a first housing 121 and a first sampling rod drive part 122 disposed within the first housing 121. The first sampling rod drive part 122 includes a first hydraulic pump 1221 for outputting power, a first reversing valve 1222, a first oil tank 1223, and a hydraulic motor 1224 for rotating the sampling rod 130. The oil inlet of the first hydraulic pump 1221 is connected to the first oil tank 1223 through a first pipe 1225. The oil outlet is connected to the oil inlet of the first directional valve 1222 via the first pipe 1225. The two working oil ports of the first directional valve 1222 are respectively connected to the two working oil ports of the hydraulic motor 1224 via the first pipe 1225. The oil return port of the first directional valve 1222 is connected to the first oil tank 1223 via an oil pipe. The upper end of the sampling rod 130 is rotatably and movable inside the first housing 121. The output end of the hydraulic motor 1224 is drivenly connected to the upper end of the sampling rod 130.

[0034] The first hydraulic pump 1221 is started. The first hydraulic pump 1221 draws hydraulic oil from the first oil tank 1223 through the first pipe 1225, pressurizes it, and outputs it. The pressurized oil enters the inlet of the first directional valve 1222 through the first pipe 1225. The first directional valve 1222 is operated, causing the pressurized oil to flow out from its working port and through the first pipe 1225 into the working port of the hydraulic motor 1224, driving the hydraulic motor 1224 to work, which in turn drives the sampling rod 130 connected to the output end of the hydraulic motor 1224 to rotate. Operating the first directional valve 1222 to switch the direction of pressurized oil flow changes the rotation direction of the sampling rod. The hydraulic oil after driving the hydraulic motor 1224 flows back to the return port of the first directional valve 1222 and then back to the first oil tank 1223 through the first pipe 1225.

[0035] The sampling rod 130 is driven to rotate by the first sampling rod drive unit 122, the first hydraulic pump 1221 provides pressurized oil, the first reversing valve 1222 controls the direction of the oil circuit, and the hydraulic motor 1224 converts hydraulic energy into mechanical rotational motion, which drives the sampling rod 130 and the sampling cylinder 140 to rotate and cut into the soil. The hydraulic drive provides stable rotational power, which can quickly and economically understand the chemical composition or macroscopic stratification of the soil. It can achieve the effect of sampling in hard soil, improve sampling efficiency and increase sampling depth, and reduce manual labor intensity.

[0036] In other embodiments, the first sampling rod drive unit 122 further includes a hydraulic chuck 1226, a chuck control directional valve 1227 for controlling the clamping mechanism 12262 to clamp or release, and a two-way lock-up valve 1228. The hydraulic chuck 1226 includes a chuck body 12261 and a clamping mechanism 12262. The output shaft of the hydraulic motor 1224 is fixedly connected to the chuck body 12261. The clamping mechanism 12262 is used to clamp or release the sampling rod 130. At the top, the oil outlet of the first hydraulic pump 1221 is also connected to the oil inlet of the chuck control directional valve 1227 through a third pipe 1229. The working oil port of the chuck control directional valve 1227 is connected to the clamping mechanism 12262 through the third pipe 1229. The bidirectional locking valve 1228 is provided on the connecting oil line for hydraulically locking the clamping mechanism 12262. The return oil port of the chuck control directional valve 1227 is connected to the first oil tank 1223.

[0037] An additional oil path is added to the outlet of the first hydraulic pump 1221. Pressure oil output from the outlet of the first hydraulic pump 1221 flows into the inlet of the chuck-controlled directional valve 1227 via the third pipe 1229. Operation of the chuck-controlled directional valve 1227 causes pressure oil to be output from its two working ports, flowing through the third pipe 1229 into the bidirectional locking valve 1228, and then output from the bidirectional locking valve 1228, flowing through the third pipe 1229 into the clamping mechanism 12262. The clamping mechanism 12262 clamps the sampling rod 130. The bidirectional locking valve 1228 locks the oil path, maintaining the clamping force of the clamping mechanism 12262. When the chuck-controlled directional valve 1227 is switched, the clamping mechanism 12262 releases. The hydraulic oil driving the hydraulic chuck 1226 flows back to the chuck control directional valve 1227, and then flows back to the first oil tank 1223 through the third pipe 1229 from the oil outlet of the chuck control directional valve 1227. The hydraulic chuck 1226 controls the clamping or releasing of the sampling rod 130 through the chuck control directional valve 1227, and the two-way locking valve 1228 ensures a stable clamping state and prevents loosening. By setting the hydraulic chuck 1226, the sampling rod 130 can be quickly clamped and released, improving operational safety and efficiency. The two-way locking valve 1228 hydraulically locks to ensure that it will not be accidentally released during sampling, and the sampling rod 130 and the connecting part 120 can be detachably connected, facilitating the user to replace the module.

[0038] In one embodiment, the connecting part 120 includes a second housing 123 and a second sampling rod drive part 124 disposed within the second housing 123. The second sampling rod drive part 124 includes a second hydraulic pump 1241 for outputting power, a second reversing valve 1242, a hydraulic cylinder 1243 for providing downward pressure to the sampling rod 130, a second oil tank 1244, and a movable frame 1245. The oil inlet of the second hydraulic pump 1241 is connected to the second oil tank 1244 through a second pipe 1246, and the oil outlet of the second hydraulic pump 1241 is connected to the second pipe 1246. The oil inlet of the second directional valve 1242 is connected to the oil outlet of the second directional valve 1242. The two working oil ports of the second directional valve 1242 are connected to the rodless chamber and the rod chamber of the hydraulic cylinder 1243 respectively through the second pipe 1246. The oil return port of the second directional valve 1242 is connected to the second oil tank 1244 through the second pipe 1246. The end of the piston rod of the hydraulic cylinder 1243 is connected to the movable frame 1245 to push the movable frame 1245 to perform vertical linear movement. The upper end of the sampling rod 130 extends into the second housing 123 and is detachably connected to the movable frame 1245.

[0039] The second hydraulic pump 1241 is started. The second hydraulic pump 1241 draws hydraulic oil from the second oil tank 1244 through the second pipe 1246, pressurizes it, and outputs it. The pressurized oil enters the inlet of the second directional valve 1242 through the second pipe 1246. The second directional valve 1242 is operated, causing the pressurized oil to flow out from its working port and enter the cavity of the hydraulic cylinder 1243 through the second pipe 1246, driving the hydraulic cylinder 1243 to work. Operating the second directional valve 1242 allows pressurized oil to enter the rodless chamber of the hydraulic cylinder 1243, extending the piston rod and pushing the movable frame 1245 and sampling rod 130, connected to the end of the piston rod of the hydraulic cylinder 1243, downwards. Switching the second directional valve 1242 allows pressurized oil to enter the rod chamber, causing the piston rod to rise and retract, pushing the movable frame 1245 and sampling rod 130, connected to the end of the piston rod of the hydraulic cylinder 1243, upwards.

[0040] The pressure difference between the rod-side and rodless-side chambers of the hydraulic cylinder 1243 provides a vertical downward pressure on the piston rod, pushing the movable frame 1245 and the sampling rod 130 downwards. The second hydraulic pump 1241 and the second directional valve 1242 control the direction of the oil circuit, achieving downward pressure and upward retraction. The hydraulic downward pressure is large and stable, enabling effective sampling in cohesive soils and soils with high water content, improving the sampling success rate. It preserves the soil's original state as much as possible, without damaging the natural structure, density, water content, and stratification of the sampled soil, thus improving sampling efficiency, increasing sampling depth, and reducing manual labor intensity.

[0041] In other embodiments, the sampling rod 130 is detachably connected to the movable frame 1245. This can be achieved by setting a snap-fit ​​structure at corresponding positions on the sampling rod 130 and the movable frame 1245, or by setting a threaded structure at corresponding positions on the sampling rod 130 and the movable frame 1245.

[0042] In other embodiments, the second sampling rod drive unit 124 further includes a shut-off valve 1247, which is disposed on the second pipe 1246 connecting the second directional valve 1242 and the rodless chamber of the hydraulic cylinder 1243. The control port of the shut-off valve 1247 is connected to the working oil circuit connecting the second directional valve 1242 and the rod chamber of the hydraulic cylinder 1243.

[0043] The pressurized oil output from the working port of the second directional valve 1242 passes through the shut-off valve 1247 and enters the rodless chamber of the hydraulic cylinder 1243, causing the piston rod of the hydraulic cylinder 1243 to be pressed down due to the pressure difference between the chambers. When the piston rod of the hydraulic cylinder 1243 is locked down, the control port of the shut-off valve 1247 is depressurized, preventing pressurized oil from being output from the rodless chamber of the hydraulic cylinder 1243. When the piston rod of the hydraulic cylinder 1243 needs to rise and retract, pressurized oil is output from the second directional valve 1242 through the second pipe 1246 to the rod chamber of the hydraulic cylinder 1243. At the same time, pressurized oil is also introduced into the control port of the shut-off valve 1247, opening the valve port of the shut-off valve 1247 and allowing the oil in the rodless chamber of the hydraulic cylinder 1243 to flow out.

[0044] The shut-off valve 1247 serves as a safety locking device, controlling the flow of hydraulic oil in the rodless chamber oil circuit to prevent the piston rod of the hydraulic cylinder 1243 from accidentally retracting, ensuring a stable downward pressure position. By setting the shut-off valve 1247, the safety and stability of the device are improved, preventing the sampling rod 130 from retracting during sampling, and providing a stable downward pressure continuously when locked, ensuring sampling depth and sample integrity.

[0045] In other embodiments, the shut-off valve 1247 may be a hydraulically controlled check valve to lock the oil circuit and prevent the piston rod of the hydraulic cylinder 1243 from accidentally retracting due to external force, while continuously providing stable downward pressure when locked.

[0046] The sampling rod 130 is used to transmit power, is connected to the sampling cylinder 140, and is connected to the connecting part 120.

[0047] The sampling rod 130 is detachably disposed at the lower end of the connecting part 120 and connected to the connecting part 120. The lower end of the sampling rod 130 is provided with a connecting component 131 and a locking component 132. The user mates the sampling rod 130 with the connecting part 120 and connects it to the sampling cylinder 140 via the connecting component 131 and the locking component 132, ensuring effective transmission of force and motion during sampling. The sampling rod 130, as a key component for transmitting force and motion, is connected to the sampling cylinder 140 via the connecting component 131 and the locking component 132, enabling modular assembly and fixation. The detachable design facilitates the replacement of sampling rods 130 of different lengths or functions, adapting to various sampling needs.

[0048] The sampling tube 140 is used to collect soil and is connected to the sampling rod 130.

[0049] The sampling cylinder 140 has openings at both ends, forming a hollow soil storage cavity 141. The upper end of the sampling cylinder 140 is connected to the lower end of the sampling rod 130 via the connecting assembly 131, and its vertical relative position to the sampling rod 130 is locked by the locking assembly 132. The sampling cylinder 140 is inserted into the soil under the action of the sampling rod 130, and the soil enters the cavity through the bottom inlet of the sampling cylinder 140. After sampling, the sampling cylinder 140 separates from the sampling rod 130 for sample processing. The sampling cylinder 140 serves as a container for soil samples, storing the sampled soil through the hollow cavity, and is connected to the sampling rod 130, moving with the sampling rod 130 into the soil. The sampling cylinder 140 has a simple structure, facilitating sample preservation and transfer, and the openings at both ends facilitate soil entry and exit.

[0050] The sampling tube 140 can be replaced according to sampling needs, and sampling tubes 140 of different lengths and widths can be replaced.

[0051] In one embodiment, the connecting component 131 is a metal tube 1311 integrally formed with the sampling rod 130, and the metal tube 1311 is provided with a plurality of through holes 1312 arranged sequentially at a predetermined distance along the vertical direction; the locking component 132 is a locking screw, and the upper end of the sampling cylinder 140 is provided with a plurality of screw holes 141 in the circumferential direction, and the locking screw passes through any one or more through holes 1312 and locks with the screw hole 141 at the upper end of the sampling cylinder 140.

[0052] According to the sampling depth requirements, the user selects a suitable depth for the through hole 1312, inserts the locking screw, and tightens it to fix the sampling tube. By aligning the through hole 1312 on the metal tube 1311 with the screw hole 141 of the sampling tube, and fixing the relative position of the two with the locking screw, an adjustable depth connection is achieved. This allows adjustment of the insertion depth of the sampling tube to adapt to sampling of different soil layers, improving sampling flexibility and accuracy.

[0053] In one embodiment, the connecting component 131 of the sampling rod is an elastic metal hoop 1314 with an elastic opening 1313 on one side, and the locking component 132 is a locking screw. The locking component 132 is disposed at the elastic opening 1313 and is used to tighten or loosen the elastic opening 1313 to adjust the inner diameter of the elastic metal hoop 1314.

[0054] Tightening the locking screw tightens the elastic metal clamp 1314, holding the sampling cylinder 140 in place; loosening the locking screw releases the elastic metal clamp 1314, allowing the sampling cylinder 140 to be removed. The elastic metal clamp 1314, with its inner diameter adjusted by the locking screw, clamps or releases the sampling cylinder 140, achieving quick connection and fixation. This method provides a fast and secure connection, meeting the needs of frequent replacement of the sampling cylinder 140, improving operational efficiency, and adapting to different soil sampling requirements.

[0055] An observation groove 1315 extending vertically is provided on the other side of the elastic metal hoop 1314, and a length mark 1316 is provided on at least one side of the observation groove 1315; the upper end of the sampling tube 140 is inserted into the elastic metal hoop 1314 and locked and fixed by the locking screw, and the insertion length of the sampling tube 140 can be observed from the observation groove 1315.

[0056] The user inserts the sampling cylinder 140 into the elastic metal clamp 1314, checks the length mark 1316 through the observation groove 1315, adjusts it to the required depth, and then locks it. Through the observation groove 1315 and the length mark 1316, the user can directly read the insertion depth of the sampling cylinder 140, ensuring accurate sampling position, improving the accuracy and visibility of sampling depth control, reducing errors, and meeting the needs for precise stratified sampling.

[0057] The cutting head 150 is used to cut the soil, making it easier for the soil to enter the sampling tube 140.

[0058] The cutting head 150 is detachably connected to the bottom of the sampling cylinder 140, and a soil inlet 151 is vertically penetrating the middle of the cutting head 150, communicating with the soil storage cavity of the sampling cylinder 140. During sampling, the cutting head 150 first contacts the soil, cutting and guiding the soil through the inlet into the sampling cylinder 140. As the sampling front-end component in contact with the soil, the cutting head 150 cuts the soil with its sharp edge, and the soil inlet 151 allows soil to enter the cavity of the sampling cylinder 140. The detachable design facilitates the replacement of worn parts, and the soil inlet 151 ensures smooth soil entry, improving sampling efficiency and quality.

[0059] The cutting head 150 can be selected to be spiral-shaped or sharp-blade-shaped, depending on the current soil sampling requirements.

[0060] In other embodiments, the cutting head 150 is detachably connected to the bottom of the sampling cylinder 140; in one embodiment, this connection may be a snap-fit ​​connection.

[0061] The soil recovery device 160 is used for automated recovery of soil samples.

[0062] In other embodiments, the modular soil sampling device further includes a soil recovery device 160, which includes a sampling tube fixing device 161, a push rod 162, a motor 163, and a collection container 164. The sampling tube fixing device 161 is used to fix the sampling tube 140. The push rod 162 is disposed on the sampling tube fixing device 161 and driven by the motor 163. It is used to extend into the sampling tube 140 and push out the soil sample inside the sampling tube 140. The collection container 164 is disposed in the pushing direction of the push rod 162 and is used to collect the soil sample pushed out from the sampling tube 140.

[0063] The sampling tube 140 is detached and fixed to the sampling tube fixing device 161. The motor 163 is started, and the push rod 162 extends into the sampling tube 140 from one end opening, pushing out the soil. The sample falls into the collection container 164 from the other end opening of the sampling tube 140. By driving the push rod 162 with the motor 163, the soil sample in the sampling tube 140 is pushed into the collection container 164, achieving automated sample recovery. This improves sample recovery efficiency, avoids sample contamination or loss caused by manual operation, and improves sample collection quality and efficiency.

[0064] In summary, the modular soil sampling device provided by this utility model allows for the detachable connection of components such as the manual pressure rod 110, connecting part 120, sampling rod 130, sampling cylinder 140, and cutting head 150 through modular design. Modules can be replaced according to different soil hardness, depth, and sampling requirements, facilitating operation and matching current soil sampling needs. Furthermore, after module replacement, the modular soil sampling device can be stably assembled, providing the stable power required for soil sampling and ensuring the necessary sampling accuracy, high efficiency, and good sample quality.

[0065] The specific examples described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular soil sampling device, characterized in that, include: Manual lever for gripping and pressing down; A connecting part is provided at the lower end of the manual pressure rod and is detachably connected to the manual pressure rod; A sampling rod is detachably disposed at the lower end of the connecting part and connected to the connecting part. The lower end of the sampling rod is provided with a connecting component and a locking component. The sampling tube has openings at both ends to form a hollow soil storage cavity. The upper end of the sampling tube is connected to the lower end of the sampling rod through the connecting assembly, and the locking assembly locks its relative position with the sampling rod in the vertical direction. The cutting head is detachably connected to the bottom of the sampling cylinder, and the middle of the cutting head has a soil inlet that is vertically opened and communicates with the soil storage cavity of the sampling cylinder.

2. The modular soil sampling device according to claim 1, characterized in that, The connecting component is a metal tube integrally formed with the sampling rod. The metal tube is provided with a plurality of through holes arranged at predetermined intervals along the vertical direction. The locking component is a locking screw. The upper end of the sampling tube is provided with a plurality of screw holes. The locking screw passes through any one or more through holes and locks with the screw holes at the upper end of the sampling tube.

3. The modular soil sampling device according to claim 1, characterized in that, The connecting component is an elastic metal hoop with an elastic opening on one side, and the locking component is a locking screw. The locking component is located at the elastic opening and is used to tighten or loosen the elastic opening to adjust the inner diameter of the elastic metal hoop.

4. A modular soil sampling device according to claim 3, characterized in that, An observation groove extending vertically is provided on the other side of the elastic metal hoop, and a length mark is provided on at least one side of the observation groove; the upper end of the sampling tube is inserted into the elastic metal hoop and locked in place by the locking screw, and the insertion length of the sampling tube can be observed from the observation groove.

5. A modular soil sampling device according to claim 1, characterized in that, The connecting part includes a first housing and a first sampling rod drive unit disposed within the first housing. The first sampling rod drive unit includes a first hydraulic pump for outputting power, a first reversing valve, a first oil tank, and a hydraulic motor for rotating the sampling rod. The oil inlet of the first hydraulic pump is connected to the first oil tank through a first pipe, and the oil outlet of the first hydraulic pump is connected to the oil inlet of the first reversing valve through a first pipe. The two working oil ports of the first reversing valve are respectively connected to the two working oil ports of the hydraulic motor through a first pipe. The oil return port of the first reversing valve is connected to the first oil tank through an oil pipe. The upper end of the sampling rod is rotatably and movable within the first housing, and the output end of the hydraulic motor is drivenly connected to the upper end of the sampling rod.

6. A modular soil sampling device according to claim 5, characterized in that, The first sampling rod drive unit further includes a hydraulic chuck, a chuck control directional valve for controlling the clamping mechanism to tighten or loosen, and a two-way hydraulic lock. The hydraulic chuck includes a chuck body and a clamping mechanism. The output shaft of the hydraulic motor is fixedly connected to the chuck body. The clamping mechanism is used to clamp or loosen the top end of the sampling rod. The oil outlet of the first hydraulic pump is also connected to the oil inlet of the chuck control directional valve through a third pipe. The working oil port of the chuck control directional valve is connected to the clamping mechanism through a third pipe. The two-way hydraulic lock is set on the connecting oil line and is used to hydraulically lock the clamping mechanism. The oil return port of the chuck control directional valve is connected to the first oil tank.

7. A modular soil sampling device according to claim 1, characterized in that, The connecting part includes a second housing and a second sampling rod drive unit disposed within the second housing. The second sampling rod drive unit includes a second hydraulic pump for outputting power, a second reversing valve, a hydraulic cylinder for providing downward pressure to the sampling rod, a second oil tank, and a movable frame. The oil inlet of the second hydraulic pump is connected to the second oil tank through a second pipe, and the oil outlet of the second hydraulic pump is connected to the oil inlet of the second reversing valve through a second pipe. The two working oil ports of the second reversing valve are respectively connected to the rodless chamber and the rod chamber of the hydraulic cylinder through second pipes. The oil return port of the second reversing valve is connected to the second oil tank through a second pipe. The end of the piston rod of the hydraulic cylinder is connected to the movable frame to push the movable frame to perform vertical linear movement. The upper end of the sampling rod extends into the second housing and is detachably connected to the movable frame.

8. A modular soil sampling device according to claim 7, characterized in that, The second sampling rod drive unit also includes a shut-off valve, which is disposed on the second pipeline connecting the second directional valve and the rodless chamber of the hydraulic cylinder. The control port of the shut-off valve is connected to the working oil circuit connecting the second directional valve and the rod chamber of the hydraulic cylinder.

9. A modular soil sampling device according to any one of claims 1 to 8, characterized in that, It also includes a soil recovery device, which includes a sampling tube fixing device, a push rod, a motor, and a collection container. The sampling tube fixing device is used to fix the sampling tube. The push rod is mounted on the sampling tube fixing device and driven by the motor. It is used to extend into the sampling tube and push out the soil sample from the sampling tube. The collection container is located in the pushing direction of the push rod and is used to collect the soil sample pushed out from the sampling tube.

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