A stopper with adjustable sampling depth

Abstract

The utility model relates to soil sampling equipment technical field especially, more particularly to adjustable sampling depth's stopper, including limit base, the limit base along its vertical direction's centre axis is connected with the guide cylinder of sliding, the guide cylinder is coaxially connected with the sampler of sliding in, the sampler top is equipped with the limit ring, install a plurality of groups of support rod on the limit base, a plurality of groups support rod all are equipped with depth adjusting assembly. The utility model is provided with the guide cylinder that drives movement through depth adjusting assembly, thereby can flexibly and accurately adjust the depth of insertion of guide cylinder, the sampling depth of sampler is limited through the guide cylinder, control depth adjusting assembly maintains the insertion depth reference of guide cylinder and keeps from changing, thereby makes the insertion depth of sampler relative soil layer always keep consistent in the multiple sampling process, thereby helps to eliminate the error variable of sampling depth between single batch's multiple sampling points.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling equipment technology, and in particular to a limiter with adjustable sampling depth. Background Technology

[0002] Soil sampling devices, such as soil samplers and soil drills, are specialized tools used to obtain soil samples from the surface or a specific depth. The quality of the sampling directly affects the accuracy of the analysis results. Soil sampling devices are widely used in many fields such as environmental monitoring, agricultural soil testing and fertilization, geological exploration, and engineering construction to analyze the content of microbial components, pollutant content, and geological composition and structure in the soil.

[0003] The sampling depth control of soil sampling devices is not precise, usually relying on the sampling personnel to manually press the sampler into the soil layer. The insertion depth is estimated based on the scale on the sampling device and the experience of the sampling personnel. This makes it difficult to unify the sampling depth at different points and at different times in the same sampling batch, resulting in uncertain variables in the analysis and affecting the representativeness of the samples. In addition, during the sampling process, the entire device is prone to sinking into the soft soil layer under continuous downward pressure, causing the preset sampling reference surface to shift, which further introduces depth error. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable sampling depth limiter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable sampling depth limiter includes a limiting base, a guide cylinder slidably connected to the limiting base along its vertical central axis, a sampler slidably connected coaxially in the guide cylinder, a limiting ring at the top of the sampler, and multiple sets of support rods installed on the limiting base. Each of the multiple sets of support rods is equipped with a depth adjustment component, and any one of the depth adjustment components is driven to connect to a support connecting rod. The other end of the support connecting rod is fixedly connected to the guide cylinder.

[0006] Preferably, the support rod has an installation groove along its length, the depth adjustment assembly includes a lead screw rotatably disposed in the installation groove, one end of the lead screw passes through the side wall of the support rod and is connected to a drive motor, a slider is drivenly connected to the body of the lead screw, and one end of the support connecting rod is hinged to the slider.

[0007] Preferably, a fixing ring is fixedly installed at the top of the outer periphery of the guide cylinder, and the end of the support rod away from the slider is hinged to the fixing ring.

[0008] Preferably, the support rod has a connecting seat at its side end along its length, and the connecting seat has a positioning hole.

[0009] Preferably, multiple sets of support rods are arranged around the limiting base, and the multiple sets of support rods are respectively hinged to the limiting base.

[0010] Preferably, the guide cylinder has a plurality of guide grooves along its axial direction on its outer periphery, and the limiting base has a guide block that is slidably connected to the plurality of guide grooves.

[0011] Preferably, the bottom of the guide cylinder is provided with a first tip, and the outer periphery of the guide cylinder is also provided with a plurality of pressure relief holes that penetrate the guide cylinder radially.

[0012] Preferably, the sampler includes an insertion end that is slidably connected to a guide cylinder. The bottom of the insertion end is provided with a first tip, and a limit ring is installed on the top. A handle is fixedly connected to the other end of the limit ring.

[0013] Preferably, the outer periphery of the insertion end is provided with a plurality of sampling grooves, the plurality of sampling grooves are arranged around the insertion end, and the plurality of sampling grooves extend along the axial direction of the insertion end and penetrate the first tip.

[0014] Preferably, the length of the guide tube is equal to the length of the insertion end.

[0015] Compared with the prior art, this utility model provides an adjustable sampling depth limiter, which has the following beneficial effects: 1. This utility model is equipped with a guide cylinder driven by a depth adjustment component, which can flexibly and accurately adjust the insertion depth of the guide cylinder. The guide cylinder limits the sampling depth of the sampler, and controls the depth adjustment component to keep the insertion depth benchmark of the guide cylinder unchanged. This ensures that the insertion depth of the sampler relative to the soil layer remains consistent during multiple sampling processes, thereby helping to eliminate the error variables of sampling depth between multiple sampling points in a single batch. 2. This utility model sets a limiting base and surrounds the limiting base with multiple sets of support rods with connecting seats, thereby forming a support structure with the ground, increasing the contact area between the equipment and the ground, thus distributing the downward pressure force on the limiting base during sampling, and effectively preventing the entire device from sinking in soft soil. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front upper three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the front lower three-dimensional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the folded state of this utility model; Figure 4 This is a three-dimensional structural diagram of the limiting base structure of this utility model; Figure 5 This is a three-dimensional structural diagram of the guide tube and sampler in the assembled state of this utility model; Figure 6 This is a partial cross-sectional three-dimensional structural schematic diagram of the guide tube and sampler in the assembled state of this utility model; Figure 7 This is a three-dimensional structural diagram of the sampler of this utility model; Figure 8 This is a three-dimensional structural diagram of the guide cylinder of this utility model.

[0017] In the diagram: 1. Sampler; 101. Handle; 102. Limiting ring; 103. Insertion end; 1031. Sampling groove; 1032. First tip; 2. Guide cylinder; 201. Fixing ring; 202. Guide groove; 203. Pressure relief hole; 204. Second tip; 3. Support rod; 4. Support rod; 401. Connecting seat; 402. Positioning hole; 5. Depth adjustment assembly; 501. Drive motor; 502. Lead screw; 503. Slider; 6. Limiting base; 601. Guide block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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] Example, refer to Figure 1 - Figure 8An adjustable sampling depth limiter includes a limiting base 6, a guide cylinder 2 slidably connected to the limiting base 6 along its vertical central axis, the limiting base 6 being set on the ground and used to limit the insertion depth of the guide cylinder 2 into the soil layer, the guide cylinder 2 being used for positioning and guidance during insertion into the soil layer, a sampler 1 being slidably connected coaxially in the guide cylinder 2, the top of the sampler 1 being provided with a limiting ring 102, allowing the sampler 1 to move along the axial direction of the guide cylinder 2, thereby inserting into the soil layer for sampling, multiple sets of support rods 4 being installed on the limiting base 6, each of the multiple sets of support rods 4 being equipped with a depth adjustment component 5, the limiting base 6 and the multiple sets of support rods 4 being fixed on the ground, forming a support structure with the ground, the depth adjustment component 5 being driven and connected to a support connecting rod 3, the other end of the support connecting rod 3 being fixedly connected to the guide cylinder 2, used to drive the guide cylinder 2 to move, so that the guide cylinder 2 can adjust its insertion depth into the soil layer along its axial direction, the limiting ring 102 being used to abut against the top surface of the guide cylinder 2, thereby limiting the maximum insertion depth of the sampler 1.

[0021] In use, the depth adjustment component 5 drives the support link 3 to pull the guide cylinder 2. Under the action of the tension, the guide cylinder 2 slides relative to the limiting base 6, thereby changing the depth of the guide cylinder 2 passing through the limiting base 6. This depth is the depth at which the guide cylinder 2 is inserted into the soil. The sampler 1 is set in the guide cylinder 2 and moves along the axial direction of the guide cylinder 2, thereby sliding along the axial direction of the guide cylinder 2 to insert into the soil layer for sampling. The sampler 1 is provided with a limiting ring 102. When the limiting ring 102 abuts against the top wall of the guide cylinder 2, the maximum insertion depth of the sampler 1 is reached.

[0022] Furthermore, the support rod 4 is provided with an installation groove along its length. The depth adjustment assembly 5 includes a lead screw 502 rotatably disposed in the installation groove. One end of the lead screw 502 passes through the side wall of the support rod 4 and is connected to a drive motor 501. A slider 503 is driven and connected to the body of the lead screw 502. One end of the support connecting rod 3 is hinged to the slider 503. The drive motor 501 drives the lead screw 502 to rotate. The rotation of the lead screw 502 drives the slider 503 to move the support connecting rod 3 along the direction of the rod body, thereby moving closer to or away from the limiting base 6. The other end of the support connecting rod 3 is connected to the guide cylinder 2, thereby pulling the guide cylinder 2 to move synchronously.

[0023] Furthermore, a fixing ring 201 is fixedly installed at the top of the outer periphery of the guide cylinder 2. The end of the support rod 3 away from the slider 503 is hinged to the fixing ring 201. The fixing ring 201 is hinged to the support rod 3, so that the support rod 3, driven by the drive motor 501, pulls the fixing rod to drive the guide cylinder 2 to move relative to the limiting base 6, thereby changing the length of the guide cylinder 2 passing through the bottom end face of the limiting base 6, thereby adjusting the depth of the guide cylinder 2 inserted into the soil layer, and finally used to limit the insertion depth of the sampler 1.

[0024] When in use, when the slider 503 is at the end closest to the limit, the limit link is in a vertical state, that is, the part of the guide cylinder 2 that can be inserted into the soil layer is the shortest, and the sampling depth of the sampler 1 is the shortest; conversely, when the limit link is in a horizontal state, the part of the guide cylinder 2 that can be inserted into the soil layer is the longest, and the sampling depth of the sampler 1 is the longest.

[0025] During use, the transmission structure between the lead screw 502 and the slider 503 has a self-locking property. That is, when the lead angle of the lead screw 502 is less than the equivalent friction angle between the lead screw 502 and the slider 503, no matter how large the axial component force from the guide cylinder 2 and the sampler 1 is applied to the slider 503, it cannot drive the lead screw 502 to rotate in the reverse direction. This axial force will be converted into the frictional force between the thread of the lead screw 502 and the internal structure of the slider 503. This frictional torque is much greater than the torque that drives the lead screw 502 to reverse. Therefore, when the drive motor 501 stops working, the position of the slider 503 will be firmly locked and cannot slide on its own, thus achieving self-locking and anti-reverse rotation.

[0026] Furthermore, a connecting seat 401 is provided at the side end of the support rod 4 along its length. The connecting seat 401 is provided with a positioning hole 402. The support rod 4 and the connecting seat 401 are used to support the ground, thereby increasing the contact area between the limiting base 6 and the ground. Through the force-bearing area between the two, the pressure on the ground is reduced, preventing the limiting base 6 from sinking into the soil layer due to the thrust of the guide cylinder 2 or the sampler 1 during the sampling process. The positioning hole 402 is used to insert bolts to fix the connection with the ground, thereby fixing the position of the limiting base 6 and the support rod 4. This ensures that the limiting base 6 remains stable during the sampling process, provides stable guidance for the guide cylinder 2, and allows the sampler 1 to move smoothly along the guide cylinder 2 during the sampling process, avoiding jamming.

[0027] Furthermore, multiple sets of support rods 4 are arranged around the limiting base 6. By setting multiple sets of support rods 4, each set of support rods 4 is equipped with a depth adjustment component 5. The multiple sets of depth adjustment components 5 move synchronously, thereby simultaneously driving the support connecting rod 3 to move the guide cylinder 2 relative to the limiting base 6 to adjust the insertion depth. Moreover, the multiple sets of support rods 4 are respectively hinged to the limiting base 6, so that the support rods 4 can be flipped relative to the limiting base 6, thereby flipping and folding, reducing the space occupied when not in use.

[0028] Furthermore, the outer periphery of the guide cylinder 2 is provided with a plurality of guide grooves 202 along its axial direction, and the limiting base 6 is provided with guide blocks 601 that are slidably connected to the plurality of guide grooves 202 to play a guiding role. In use, the guide grooves 202 of the guide cylinder 2 and the guide blocks 601 cooperate and slide to prevent the guide cylinder 2 from rotating relative to the limiting base 6, which would cause the support connecting rod 3 to be bent by torque.

[0029] Furthermore, the bottom of the guide cylinder 2 is provided with a second tip 204 to reduce the force-bearing area and increase the pressure, so that the guide cylinder 2 can be inserted into the soil layer more easily. The outer periphery of the guide cylinder 2 is also provided with several pressure relief holes 203 that penetrate the guide cylinder 2 radially. After the guide cylinder 2 is inserted into the soil layer, part of the soil layer fills the inside of the guide cylinder 2. The sampler 1 is inserted downward along the axial direction of the guide cylinder 2 into this part of the soil layer for sampling. During the insertion of the sampler 1, the solid part of the sampler 1 squeezes the soil layer, so that the soil layer is under force. The soil layer near the pressure relief hole 203 and near the bottom of the guide cylinder 2 moves away from the guide cylinder 2 under the force, so that the insertion of the sampler 1 is less effort and the sampling operation time is effectively shortened.

[0030] Furthermore, the sampler 1 includes an insertion end 103, which is slidably connected to the guide cylinder 2. The bottom of the insertion end 103 is provided with a first tip 1032 to facilitate breaking the soil layer, thereby allowing the insertion end 103 to be inserted into the soil. A limiting ring 102 is installed on the top of the insertion end 103. During sampling, the limiting ring 102 moves with the insertion end 103. When the bottom wall of the limiting ring 102 abuts against the top wall of the guide cylinder 2, the insertion end 103 reaches the maximum insertion depth. The other end of the limiting ring 102 is fixedly connected to a handle 101. The handle 101 applies a downward thrust along the axial direction of the insertion end 103 to push the insertion end 103 to move along the guide cylinder 2, thereby inserting it into the soil layer. After sampling is completed, the insertion end 103 is pulled out of the soil layer by pulling the handle 101 in the opposite direction.

[0031] Furthermore, the outer periphery of the insertion end 103 is provided with a plurality of sampling grooves 1031, which are arranged around the insertion end 103 and are bolted along the axial direction of the insertion end 103 and through the first tip 1032. This is to ensure that during the insertion process, part of the soil inside the guide cylinder 2 is squeezed and filled into the sampling grooves 1031 under the action of the guide cylinder 2 wall and the insertion end 103. After the insertion end 103 is pulled out, the soil in the sampling grooves 1031 is carried away from the soil layer along with the insertion end 103, thereby completing the soil sampling operation.

[0032] Furthermore, the length of the guide tube 2 is equal to the length of the insertion end 103, so that the depth to which the guide tube 2 and the insertion end 103 are inserted into the soil layer are equal. Thus, by limiting the depth to which the guide tube 2 is inserted into the soil layer, the depth to which the insertion end 103 of the sampler 1 is inserted into the soil layer can be adjusted.

[0033] Working principle: Place the limiter above the soil layer to be sampled, unfold and align each support rod 4, and fix the entire limit base 6 structure to the ground using bolts through the positioning holes 402 on the connecting seat 401. Start the drive motors 501 in all support rods 4 to make them work synchronously. The drive motors 501 drive the lead screw 502 to rotate, driving the slider 503 to move linearly along the lead screw 502. The slider 503 pushes or pulls the guide cylinder 2 through the support connecting rod 3, making it slide in the limit base 6. Adjust the depth of the guide cylinder 2 into the soil layer to reach the predetermined depth value, and apply pressure to insert the guide cylinder 2 into the soil layer. After the guide cylinder 2 is inserted into the soil layer, put the sampler 1 into the guide cylinder 2. Apply pressure to the handle 101 during sampling. The downward thrust pushes the insertion end 103 of the sampler 1 downward along the guide cylinder 2 and overcomes the soil resistance to insert into the soil layer. During the insertion process, the soil is squeezed and fills the sampling groove 1031 of the insertion end 103. When the limiting ring 102 at the top of the sampler 1 contacts the top of the guide cylinder 2, the sampler 1 can no longer go down. At this time, the preset maximum sampling depth has been reached. At this time, the handle 101 can be rotated radially around the sampler 1 so that the sampling groove 1031 can collect the environmental soil to be sampled to the maximum extent. After the sampling is completed, the handle 101 is pulled up to remove the insertion end 103 filled with soil sample from the guide cylinder 2 and scrape the soil from the sampling groove 1031 to complete a single sampling.

[0034] After sampling, clean the sampler 1 and guide cylinder 2. Flip the support rod 4 so that the support connecting rod 3 drives the guide cylinder 2 to slide relative to the limiting base 6, thereby allowing the support rod 4 to retract relative to the axis of the guide cylinder 2, so as to fold and store it for easy transportation or storage, without taking up space.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustable sampling depth limiter, comprising a limiting base (6), characterized in that: The limiting base (6) is slidably connected to a guide cylinder (2) along its vertical central axis. A sampler (1) is slidably connected to the guide cylinder (2) on the same axis. A limiting ring (102) is provided at the top of the sampler (1). Multiple sets of support rods (4) are installed on the limiting base (6). Each set of support rods (4) is equipped with a depth adjustment component (5). Any depth adjustment component (5) is driven to be connected to a support rod (3). The other end of the support rod (3) is fixedly connected to the guide cylinder (2).

2. The adjustable sampling depth limiter according to claim 1, characterized in that, The support rod (4) has an installation groove along its length. The depth adjustment component (5) includes a lead screw (502) rotatably disposed in the installation groove. One end of the lead screw (502) passes through the side wall of the support rod (4) and is connected to a drive motor (501). A slider (503) is driven and connected to the body of the lead screw (502). One end of the support connecting rod (3) is hinged to the slider (503).

3. The adjustable sampling depth limiter according to claim 2, characterized in that, A fixing ring (201) is fixedly installed on the top of the outer periphery of the guide cylinder (2), and the end of the support rod (3) away from the slider (503) is hinged to the fixing ring (201).

4. The adjustable sampling depth limiter according to claim 3, characterized in that, The support rod (4) has a connecting seat (401) on its side end along its length, and the connecting seat (401) has a positioning hole (402).

5. A limiter with adjustable sampling depth according to claim 4, characterized in that, Multiple sets of support rods (4) are arranged around the limiting base (6), and the multiple sets of support rods (4) are respectively hinged to the limiting base (6).

6. The adjustable sampling depth limiter according to claim 1, characterized in that, The guide cylinder (2) has a plurality of guide grooves (202) along its axial direction on its outer periphery, and the limiting base (6) has a guide block (601) that is slidably connected to the plurality of guide grooves (202).

7. A limiter with adjustable sampling depth according to claim 6, characterized in that, The bottom of the guide cylinder (2) is provided with a second tip (204), and the outer periphery of the guide cylinder (2) is also provided with a number of pressure relief holes (203) that penetrate the guide cylinder (2) radially.

8. The adjustable sampling depth limiter according to claim 1, characterized in that, The sampler (1) includes an insertion end (103), which is slidably connected to the guide cylinder (2). The bottom of the insertion end (103) is provided with a first tip (1032), and a limit ring (102) is installed on the top. The other end of the limit ring (102) is fixedly connected to a handle (101).

9. A limiter with adjustable sampling depth according to claim 8, characterized in that, The insertion end (103) is provided with a plurality of sampling grooves (1031) around its outer periphery. The plurality of sampling grooves (1031) are arranged around the insertion end (103), and the plurality of sampling grooves (1031) extend along the axial direction of the insertion end (103) and penetrate through the first tip (1032).

10. A limiter with adjustable sampling depth according to claim 9, characterized in that, The length of the guide tube (2) is equal to the length of the insertion end (103).

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