A hand-held push-down soil sampling device

Abstract

A handheld, downward-pressing soil sampling device includes a rotating shaft connected to the output shaft of a power head. A bracket is fixed to the lower end of the power head, and downward-pressing handles are fixed to both sides of the bracket. The lower end of the rotating shaft is fixedly connected to a sampling head via a pin. A sleeve is installed outside the rotating shaft, with its upper end fixed to the lower end of the bracket. The lower end of the sleeve is above the sampling head. The middle of the sleeve passes through a central through-hole in a support plate. The support plate also has several evenly distributed through-holes, on which guide rings are installed. The lower end of the bracket / downward-pressing handle is connected to the upper end of a guide rod, which passes through the through-hole of the guide ring. Several support rods are evenly distributed on the circumferential side of the support plate, and anchor bolts are installed at the lower ends of the support rods, embedding themselves in the ground for anchoring. This invention uses a gasoline internal combustion engine as the rotational power source. The added tripod support frame stabilizes the vertical posture of the guiding sampling rod during downward pressing and has the function of positioning the depth of the sampling head, making the depth of the sampling head in the soil layer more accurate.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection testing device technology, specifically a handheld pressure-type soil sampling device. Background Technology

[0002] To assess soil quality in a specific area, soil sampling and testing are necessary to develop appropriate land management measures and provide a basis for subsequent environmental management. For example, it can provide scientific evidence for agricultural production: by testing the nutrient content in the soil, precise fertilization recommendations can be provided to improve the yield and quality of agricultural products and ensure food safety. With the acceleration of industrialization and urbanization, soil testing can also reveal the current status of pollutants in a region, providing a scientific basis for accelerating the implementation of industrial and agricultural projects, and protecting the ecological environment and human health.

[0003] Soil sampling requires the use of soil sampling devices, the most common being columnar soil samplers. These utilize a hollow cylindrical sampling head that is vertically embedded in the soil layer. The sampling head is then pulled out to retrieve a sample of the deeper soil layers, which is then sent to a laboratory for composition analysis. Soil samplers can be categorized by their power source into manual push-down samplers: these are obtained by manually pressing down on the sampler handle to submerge the sampling head at the bottom of the vertical rod into the soil layer. However, this type of sampler requires considerable force from the operator to press down or turn the handle, and may even require striking the vertical rod with a hammer, demanding significant physical strength and making it unsuitable for long-term or frequent operation. To reduce the difficulty of sampling and the physical exertion required, a rotary handheld sampler powered by a gasoline internal combustion engine has emerged. It includes a small gasoline internal combustion engine at the top of the rotating shaft and a sampling head installed at the bottom of the shaft. The sampling head is driven to rotate by the internal combustion engine. By pressing down on the device with the hand handle, the sampling head gradually rotates and sinks into the soil layer, thus easily reaching the sampling head. Especially in areas with hard surface soil, this type of sampler can meet most soil sampling needs.

[0004] However, existing gasoline-powered handheld soil samplers still have the following shortcomings: 1. During the descent, the soil sampler must maintain a vertical posture at all times. However, during manual operation, the downward pressure inevitably causes deformation, resulting in the shaft becoming misaligned and ultimately leading to inaccurate soil samples. 2. During the descent, it is inconvenient for the operator to observe the probe and accurately determine the depth of the soil layer being sampled, making it impossible to know when to stop. Stopping too early will result in the soil not filling the hollow probe completely, while stopping too late will cause deeper soil components to mix into the shallow soil sample, resulting in inaccurate test data. Summary of the Invention

[0005] The purpose of this invention is to provide a handheld, downward-pressing soil sampling device that uses a gasoline internal combustion engine as the rotational power source. The added tripod support frame can stabilize the vertical posture of the sampling rod when it is pressed down, and it also has the function of positioning the depth of the sampling head, making the depth of the sampling head in the soil layer more accurate.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A handheld, pressure-type soil sampling device includes a rotating shaft with its upper end connected to the output shaft of a power head. A bracket is fixed to the lower end of the power head, and pressure handles are fixed to both sides of the bracket. A sampling head is fixedly connected to the lower end of the rotating shaft via a pin. A sleeve is installed outside the rotating shaft, with its upper end fixed to the lower end of the bracket. The lower end of the sleeve is above the sampling head. The middle of the sleeve passes through the central through-hole of a support plate. The support plate also has several through-holes evenly distributed, with guide rings installed on the through-holes. The lower end of the bracket / pressure handle is connected to the upper end of a guide rod, which passes through the through-hole of the guide ring. Several support rods are evenly distributed on the circumferential side of the support plate, and anchor bolts are installed at the lower ends of the support rods, embedding themselves in the ground for anchoring.

[0008] The upper end of the sleeve can be fixedly connected to the fixed bracket by threads. The sleeve is screwed into the threaded hole of the fixed bracket, which also facilitates its disassembly and assembly. The power head is a gasoline internal combustion engine + reduction gear, which adopts a hand pull start. The throttle cable is connected to the throttle wrench on the outside of the pressing handle. The output shaft of the power head is fixedly connected to the upper end of the rotating shaft through a coupling and a pin, which also facilitates disassembly and assembly. The lower end of the rotating shaft is inserted into the sampling head, and the insertion section is fixedly connected with a pin.

[0009] Several support rods and support plates form a stable and guiding working platform. Through the guiding and limiting effect of the guide rods and guide rings, the entire power sampling device can maintain a vertical state and will not deviate from its position under the stability and guidance of the platform.

[0010] The sleeve has a threaded section in the middle, which passes through and engages with the central threaded hole of the positioning nut. The positioning nut is located above the central through hole of the support plate, and the outer diameter of the positioning nut is larger than the diameter of the central through hole.

[0011] The positioning nut is used to position the height of the sleeve's sinking, thereby positioning the height of the entire power-driven drilling device. When the positioning nut is blocked by the upper part of the support plate, the drilling height has been reached, and the sampling head can no longer drill down to prevent over-drilling. Conversely, if the positioning nut does not contact the support plate, the drilling height has not been reached, and it is necessary to continue pressing down until the specified depth of soil is obtained.

[0012] The guide rod is equipped with a scale, and the scale area matches the threaded section. The operator can determine the position of the positioning nut according to the scale on the guide rod; before operation, the sleeve is pressed down to test, and when the positioning nut is in place, the height indicated by the scale is the depth of soil sampling.

[0013] The steps for using the sampling device are as follows:

[0014] (1) Assemble all the components of the equipment, and finally install the sampling head at the end of the rotating shaft and tighten the positioning nut to the preset high position;

[0015] (2) Press down the lower end of the support rod and anchor it to the ground, so that the support plate is in a horizontal position;

[0016] (3) Start the power head, and the operator holds the down handle with both hands to press the sampling head into the soil layer;

[0017] (4) When the positioning nut on the sleeve reaches the low position and contacts the upper surface of the support plate, it can be considered that the sampling depth has been reached. Pull out the sampling head and stop the power output of the power head.

[0018] (5) Remove the sampling head and take out the soil sample inside to complete the sampling work.

[0019] Advantages of utility models

[0020] 1. This utility model can ensure that the sampling head sinks to take samples and always remains in a vertical position, preventing the operator from having insufficient strength or insufficient control of the sampling angle, which would lead to inaccurate soil sampling; or the sampling device tilting and tipping over, causing safety accidents.

[0021] 2. This utility model has the function of positioning the depth of the sampling head, making the depth of the sampling head in the soil layer more accurate. The sinking height of the sampling head can be accurately positioned by the scale on the guide rod. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall elevation structure of this utility model;

[0023] Figure 2 Component drawings for the support plate, guide ring, anchor bolts, and support rod;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure along the centerline of this utility model;

[0025] The numbers and component names in the diagram are as follows: 11-Power head; 12-Press handle; 13-Bracket; 21-Support plate; 22-Positioning nut; 23-Guide rod; 24-Guide ring; 25-Anchor nail; 26-Support rod; 31-Sleeve; 311-Threaded section; 32-Shaft; 33-Sampling head. Detailed Implementation

[0026] Example 1

[0027] A handheld, pressure-type soil sampling device includes a rotating shaft 32 connected to the output shaft of a power head 11 at its upper end. A bracket 13 is fixed to the lower end of the power head 11, and pressure handles 12 are fixed to both sides of the bracket 13. A sampling head 33 is fixedly connected to the lower end of the rotating shaft 32 via a pin. A sleeve 31 is provided outside the rotating shaft 32, with its upper end fixed to the lower end of the bracket 13. The lower end of the sleeve 31 is above the sampling head 33. The middle part of the sleeve 31 passes through the central through hole of a support plate 21. The support plate 21 also has two through holes evenly distributed, with guide rings 24 installed on the through holes. The lower end of the bracket 13 / pressure handle 12 is connected to the upper end of a guide rod 23, which passes through the through hole of the guide ring 24. Several support rods 26 are evenly distributed on the circumferential side of the support plate 21, and anchor nails 25 are provided at the foot of the lower end of the support rods 26, which are embedded in the ground for anchoring.

[0028] The sleeve 31 has a threaded section 311 in the middle, which passes through and engages with the central threaded hole of the positioning nut 22. The positioning nut 22 is located above the central through hole of the support plate 21, and the outer diameter of the positioning nut 22 is larger than the diameter of the central through hole.

[0029] The guide rod 23 is provided with a scale, and the scale area matches the threaded section 311.

Claims

1. A handheld, pressure-type soil sampling device, characterized in that: The upper end of the rotating shaft (32) is connected to the output shaft of the power head (11). The lower end face of the power head (11) is fixed with a bracket (13). The lower end face of the bracket (13) is fixed with a pressing handle (12). The lower end of the rotating shaft (32) is fixedly connected to the sampling head (33) by a pin. A sleeve (31) is set outside the rotating shaft (32). The upper end of the sleeve (31) is fixed to the lower end face of the bracket (13). The lower end of the sleeve (31) is higher than the sampling head (33). The middle part of the sleeve (31) passes through the support. The central through hole of the plate (21) and the support plate (21) also have several through holes evenly distributed. A guide ring (24) is installed on the through hole. The lower end face of the bracket (13) / press-down handle (12) is connected to the upper end of the guide rod (23). The guide rod (23) passes through the through hole of the guide ring (24). Several support rods (26) are evenly distributed on the circumferential side of the support plate (21). Anchor nails (25) are set at the foot of the lower end of the support rod (26). The anchor nails (25) are embedded in the ground for anchoring.

2. The handheld pressure-type soil sampling device according to claim 1, characterized in that: The sleeve (31) has a threaded section (311) in the middle, which passes through the central threaded hole of the positioning nut (22) and engages with it. The positioning nut (22) is located on the upper part of the central through hole of the support plate (21), and the outer diameter of the positioning nut (22) is larger than the diameter of the central through hole.

3. The handheld pressure-type soil sampling device according to claim 2, characterized in that: The guide rod (23) is provided with a scale, and the scale area matches the threaded section (311) interval.

Images