A compactness detection sampling device

Abstract

This invention provides a compaction degree testing sampling device, including a sampling cylinder. The bottom ends of a rotating shaft, a sleeve rod, and a rotating rod all penetrate the top of the sampling cylinder. Multiple blades are evenly arranged at the bottom end of the rotating rod, and multiple mud-supporting plates of similar height to the blades are evenly arranged at the bottom end of the sleeve rod. The operator adjusts the position of the multiple blades by rotating the handle of the rotating head, so that the multiple blades and mud-supporting plates cooperate to cover the bottom cross-section of the sampling cylinder, achieving a closed state of the sampling cylinder after sampling. This invention, by setting up a rotating rod, rotating shaft, and sleeve rod in sequence, and by setting blades and mud-supporting plates of similar height, allows the blades and mud-supporting plates to close and cover the bottom end of the sampling cylinder, achieving a closed state of the sampling cylinder. This solves the problem of difficulty in setting up retaining mechanisms at loose soil locations during soil sampling, reduces soil loss and detection errors during sampling, improves the accuracy of single sampling, and simplifies the device structure and sampling process.

Description

Technical Field

[0001] This invention belongs to the field of testing and sampling technology, and specifically relates to a compaction degree testing and sampling device. Background Technology

[0002] Compaction quality is one of the important intrinsic indicators in the quality management and testing of road engineering. At present, the sand cone method is mostly used for compaction testing. The standard sand with uniform particles replaces the subgrade soil in the sampling hole. The actual compaction value is calculated based on the volume of the standard sand and the weight of the replaced subgrade soil. However, the use of the sand cone method still requires manual sampling, which has problems such as non-standard sampling holes and slow sampling efficiency. At the same time, the sand cone method is prone to standard sand waste, is greatly affected by the moisture content of the subgrade, and is prone to errors during sampling and measurement.

[0003] In existing technologies, drill bits or sampling cylinders are commonly used as soil drilling mechanisms. Chinese utility model patent application number CN202121204451.9 discloses a soil sampling device for testing roadbed compaction in engineering supervision. This device first rotates a rotating rod via a rotating assembly, then lowers the sampling cylinder via a driving component. The rotating cylinder descends and inserts into the ground to collect soil samples. After sampling, the sampling cylinder can be directly detached from the device to obtain the entire soil sample, improving sampling efficiency. However, in this method, the reaction force of the soil during sampling directly acts on the sampling cylinder, posing a risk of deformation or even breakage. Therefore, a certain hardness is required for the sampling cylinder. In actual operation, the sampling borehole of the sampling cylinder is annular. As the sampling cylinder rotates, soil around the inner edge of the annulus flies outwards without entering the sampling cylinder, increasing the detection error. Furthermore, the higher the rotation speed, the greater the error, creating a direct conflict between sampling efficiency and accuracy. If a drill bit is used, the volume of the drill bit inside the cylinder is difficult to accurately measure, resulting in significant errors. In addition, whether the sampling tube or the drill bit rotates, the loose soil will fall due to gravity when the sampling tube is taken out. The existing sampling device lacks a soil-retaining structure at the bottom of the sampling tube, resulting in some soil loss and thus causing detection errors.

[0004] Therefore, there is an urgent need for a compaction testing sampling device that has small error, causes minimal damage to the sampling cylinder, and has low manufacturing cost. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a compaction testing sampling device. This device aims to solve problems such as the lack of a mud-blocking structure at the bottom of the sampling cylinder, resulting in the loss of loose soil; difficulty in accurately calculating the space inside the cylinder occupied by the drill bit; potential deformation of the sampling cylinder during drilling, making it difficult to extract soil; complex structure; and large errors.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A compaction degree testing sampling device includes a sampling cylinder, a mounting shell at the top of the sampling cylinder, a rotating shaft and a motor connected by transmission mounted on the mounting shell, a sleeve rod sleeved between the rotating shaft and the sampling cylinder, a rotating rod movably sleeved on the inner side of the rotating shaft, the bottom ends of the rotating shaft, the sleeve rod and the rotating rod all penetrating the top of the sampling cylinder, the top end of the rotating rod extending out of the top of the mounting shell and provided with a rotating handle, an adjustment slot provided at the bottom of the rotating shaft, a plurality of blades evenly arranged on the rotating rod, the plurality of blades passing through the adjustment slot and distributed along the circumference of the rotating rod at the bottom end of the rotating rod, a plurality of mud-supporting plates of similar height to the blades evenly arranged at the bottom end of the sleeve rod, and the total area of ​​all the blades and mud-supporting plates not less than the cross-sectional area of ​​the bottom end of the sampling cylinder;

[0008] The operator adjusts the position of multiple blades by rotating the handle of the rotating head, so that the blades and mud-collecting plates cooperate to cover the bottom cross-section of the sampling tube, thereby achieving a closed state of the sampling tube after sampling is completed.

[0009] In some embodiments, the plane of the blade intersects the plane of the mud-collecting plate at a 30-degree angle.

[0010] In some embodiments, the adjustment slot is an I-shaped slot.

[0011] Furthermore, in some embodiments, the mud-collecting plate is horizontally positioned, and the blade is inclined.

[0012] Furthermore, in some embodiments, the mud-collecting plate is tilted in the opposite direction to the rotation direction of the blade.

[0013] In some embodiments, a drill bit is provided at the bottom end of the rotating shaft, and the blade is positioned at a height higher than the drill bit.

[0014] Furthermore, in some embodiments, the blade is rotatably connected to the rotating shaft, and an adjustment component is provided between the blade and the rotating shaft, through which the blade can achieve a small-amplitude angle adjustment.

[0015] Furthermore, in some embodiments, an angle sensor is provided between the rotating shaft and the sleeve rod, and a controller is provided at the output end of the angle sensor. A snap ring is provided at the top end of the sleeve rod and is installed inside the top shell. A display screen is provided on the top shell near the handle at the top end of the sleeve rod, and the input end of the display screen is electrically connected to the output end of the controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention, by setting up a rotating rod, a rotating shaft, and a sleeve rod in sequence, as well as blades and mud-supporting plates of similar height, utilizes the sleeve rod and mud-supporting plates as part of the soil-retaining mechanism. The blades achieve both soil loosening and soil-retaining functions, combining the soil loosening and soil-retaining mechanisms. The operator can adjust the position of the blades after soil sampling, so that the blades and mud-supporting plates close and cover the bottom of the sampling tube, achieving a closed state of the sampling tube. This solves the problem of difficulty in setting up a soil-retaining mechanism at the soil loosening position during soil sampling, reduces soil loss and detection errors during tube sampling, and the soil loosening and soil-retaining mechanisms occupy little space inside the tube, improving the accuracy of single sampling, simplifying the device structure and sampling process, increasing sampling efficiency, reducing device manufacturing costs, and the sampling is less affected by soil moisture content.

[0018] 2. This invention uses a rotating rod sleeved inside a rotating shaft, with a blade mounted on the rotating rod and a groove for connecting the blade on the rotating shaft. By utilizing the 30-degree angle between the blade and the mud-supporting plate, the operator can slightly adjust the height and circumferential position of the blade by rotating the rotating rod after soil sampling is completed. This, combined with the stationary mud-supporting plate, achieves a closed state between the blade and the mud-supporting plate at the bottom of the sampling tube.

[0019] 3. This invention separates the blade and mud-collecting plate from the motor driving the blade by setting a rotating rod, a rotating shaft, and a sleeve rod. Utilizing the groove on the rotating shaft and the rotatable rotating rod and sleeve rod, the device can achieve both circumferential position adjustment of the mud-collecting plate and angle adjustment of the blade itself. The rotation of the rotating rod and sleeve rod cooperates to achieve a closed state of the blade and mud-collecting plate at the bottom of the sampling tube, improving the operability of closing the bottom of the sampling tube. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the compaction degree detection and sampling device provided in this embodiment of the invention;

[0021] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 3 This is a schematic diagram of the blade and mud-supporting plate structure in the closed state provided in an embodiment of the present invention.

[0023] Among them, 1. Top shell; 101. Rotating handle; 2. Sampling cylinder; 3. Motor; 301. Motor gear; 4. Rotating shaft; 401. Gear disk; 402. Adjusting slot; 5. Rotating rod; 6. Sleeve rod; 7. Blade; 8. Mud support plate. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] The present invention will be further described below with reference to specific embodiments, but these are not intended to limit the scope of the invention.

[0027] A compaction degree testing sampling device includes a sampling cylinder 2. A mounting shell 1 is provided on the top of the sampling cylinder 2. A rotating shaft 4 and a motor 3 connected by transmission are mounted on the top shell 1. A sleeve rod 6 is movably sleeved on the outer side of the rotating shaft 4, and a rotating rod 5 is movably sleeved on the inner side of the rotating shaft 4. The bottom ends of the rotating shaft 4, the sleeve rod 6 and the rotating rod 5 all penetrate the top of the sampling cylinder 2. The top end of the rotating rod 5 extends out of the top of the top shell 1 and is provided with a rotating handle 101. An adjustment slot 402 is provided at the bottom of the rotating shaft 4. Multiple blades 7 are evenly arranged on the rotating rod 5. The multiple blades 7 pass through the adjustment slot 402 and are distributed along the circumference of the rotating rod 5 at the bottom end of the rotating rod 5. Multiple mud-supporting pieces 8 with a height similar to that of the blades 7 are evenly arranged at the bottom end of the sleeve rod 6. The total area of ​​all blades 7 and mud-supporting pieces 8 is not less than the cross-sectional area of ​​the bottom end of the sampling cylinder 2.

[0028] The operator adjusts the position of multiple blades 7 by rotating the rotary head handle 101, so that the blades 7 and the mud-collecting plate 8 cooperate to cover the bottom cross section of the sampling tube 2, thereby achieving a closed state of the sampling tube 2 after sampling is completed.

[0029] When in use, a downward force is applied to the device, and the motor 3 in the top shell 1 is started. The motor 3 drives the rotating shaft 4 to rotate. The connecting end of the blade 7 is locked within the groove width of the adjusting slot 402. The position can be adjusted by sliding it along the circumferential groove length manually. The adjustment is to the relative position of the rotating shaft 4 and the rotating rod 5. Because the adjusting slot 402 is only a small circumferential section, that is, the limited movable connection between the rotating shaft 4 and the rotating rod 5 does not affect the rotating shaft 4 from driving the rotating rod 5 to rotate together. Therefore, when the connecting end of the blade 7 is in contact with the adjusting slot 402, the relative position of the rotating shaft 4 and the rotating rod 5 is adjusted. When the sampling tube 2 is in the trench wall, the rotation of the rotating shaft 4 drives the rotating rod 5 to rotate, and the blade 7 also rotates. The rotation of the blade 7 causes the soil under the coverage of the sampling tube 2 to be drilled into the sampling tube 2. When the sampling tube 2 descends to the required depth for soil sampling, the motor 3 is turned off, and the rotating handle 101 at the top of the rotating rod 5 is manually rotated. The groove at the connection between the rotating rod 5 and the blade 7 drives multiple blades 7 to rotate, and slowly forms a closure with the mud support plate 8, which effectively reduces the amount of soil sample left in the pit during sampling. The outer surface of the sampling tube 2 is engraved with corresponding depth markings.

[0030] like Figures 1-3 As shown, a rotating rod 5, a rotating shaft 4, and a sleeve rod 6 are interlocked at the center of the sampling cylinder 2. A blade 7 and a mud-collecting plate 8 are respectively installed at the bottom of the rotating rod 5 and the sleeve rod 6. The independent movement of the rotating shaft 4 and the sleeve rod 6 separates the movement of the blade 7 and the mud-collecting plate 8. The motor 3 drives the blade 7 to rotate via the rotating shaft 4. The operator adjusts the relative position of the rotating shaft 4 and the rotating rod 5 by rotating the handle 101. The height and angle of the blade 7 are adjusted by the sliding of the blade 7 within the adjusting slot 402, ensuring that the blade 7 and the mud-collecting plate 8 completely cover the bottom surface of the sampling cylinder 2. The sampling tube 2 intercepts soil falling downwards, achieving a closed state. This solves the problem of difficulty in setting up a retaining mechanism at the loose soil position of the sampling tube 2, which easily leads to structural interference. It reduces soil loss during sampling and errors caused by detection. Furthermore, the blade 7 and the Tony plate are both located at the bottom of the sampling tube 2, and the rotating shaft 4 and the sleeve rod 6 occupy little space inside the tube, which to a certain extent increases the amount of soil sampled and the sampling depth in a single sampling. This avoids repeated operations caused by insufficient sample volume in a single sampling. In addition, it simplifies the overall structure and operation process of the sampling device, improves sampling efficiency, and the sampling is less affected by soil moisture content.

[0031] In some preferred embodiments, the plane of the blade 7 intersects the plane of the mud-collecting plate 8 at a 30-degree angle, forming a certain angle between the blade 7 and the mud-collecting plate. This prevents the blade 7 from sticking tightly to the mud-collecting plate during rotation, thus forming a soil-adhering layer on the bottom surface of the mud-collecting plate. At the same time, some of the soil moving when the blade 7 rotates enters the top of the mud-collecting plate, while the soil that does not enter falls down and moves again due to the rotation of the blade 7, repeating this cycle until it enters the sampling cylinder 2.

[0032] In some specific extended embodiments, a handle is provided in the top of the top shell 1, the motor 3 and the rotating shaft 4 are connected by a gear structure, and a top handle is provided at the top of the sleeve rod 6, such as... Figure 1 As shown, the top handle is located between the top of the sampling cylinder 2 and the gear structure. The rotating handle is a T-shaped handle. The rotating shaft 4 has an I-shaped groove corresponding to the welding position of the blade 7. Before sampling, the connecting part of the blade 7 is positioned in the lower horizontal groove of the I-shaped groove by rotating and pressing down the rotating rod 5. The blade 7 always rotates below the mud support plate 8. After sampling, the operator can rotate the T-shaped handle of the rotating rod 5 to position the connecting part of the blade 7 in the upper horizontal groove of the I-shaped groove, and adjust the relative position between the blade 7 and the rotating shaft 4 to cooperate with the fixed mud support plate 8 to complete the closure. Since the plane where the blade 7 is located intersects the plane where the mud support plate 8 is located at a 30-degree angle, a blade 7 that is slightly larger than the mud support plate 8 can be used. When the connecting part of the blade 7 is in the upper horizontal groove of the I-shaped groove, rotating the blade 7 will lock it between two adjacent mud support plates 8 to complete the closure.

[0033] In some specific extended embodiments, the top shell 1 is provided with a fixing groove block that matches the top handle of the sleeve rod 6. When the top handle of the sleeve rod 6 is inserted into the fixing groove block, the sleeve rod 6 and the mud support plate 8 can be fixed in place. When the soil sampling is completed, after adjusting the connection of the blade 7 to the upper horizontal groove of the I-shaped groove, the operator slides the top handle of the sleeve rod 6 out of the fixing groove block and then rotates the top handle of the sleeve rod 6 to adjust the circumferential position of the mud support plate 8, thereby achieving the closure of the blade 7 and the mud support plate 8 at the bottom of the sampling cylinder 2, which is used to cover areas that are difficult to cover even if the position of the blade 7 is adjusted or when there is a problem with the rotation of the blade 7.

[0034] In some specific extended embodiments, the mud support plate 8 is set horizontally and the blade 7 is set at an angle. This allows the blade 7 to loosen the foundation soil to the maximum extent. During the process of the device moving downward while taking samples, the sleeve rod 6 and the toggle plate are fixed. The foundation soil in the sampling hole is affected by the rotation of the blade 7 and the downward squeezing of the sampling cylinder 2, and enters the sampling cylinder 2 above the mud support plate 8 to complete the sampling and accumulation of the foundation soil.

[0035] In some specific extended embodiments, the mud support plate 8 is tilted in the opposite direction to the rotation direction of the blade 7. When the blade 7 rotates, the soil moving along the rotation direction of the blade 7 accumulates to a certain extent and then accumulates upward along the inclination of the mud support plate 8, thereby realizing the accumulation of the sampling soil in the sampling tube 2 and improving the sampling efficiency.

[0036] In some preferred embodiments, a drill bit is provided at the bottom of the rotating shaft 4, and the blade 7 is set at a height higher than the drill bit. The drill bit loosens the foundation soil initially, and the blade 7 rotates to expand the loosening range and make the foundation soil move circumferentially. The mud-supporting plate 8 is responsible for blocking the foundation soil that enters the sampling tube 2 and falls down, so as to realize the accumulation of the sampled foundation soil in the sampling tube 2 and improve the sampling efficiency.

[0037] In some preferred embodiments, the blade 7 is rotatably connected to the rotating shaft 4. An adjustment component is provided between the blade 7 and the rotating shaft 4. The blade 7 can achieve a small-amplitude angle adjustment through the adjustment component. The adjustment component is a mounting ring set at the bottom end of the rotating shaft 4. Multiple mounting components are evenly arranged on the mounting ring. The mounting end of the blade 7 is rectangular in shape. One end of the rectangular shape is rotatably installed in the mounting component, and the other end is provided with an electromagnet telescopic structure between it and the inner wall of the mounting component. The input end of the electromagnet telescopic structure is electrically connected to a controller. The controller is set inside the top shell 1. The operator can control the electromagnet telescopic structure by operating the controller, thereby controlling the setting angle of the blade 7. In this way, the operator can control the blade 7 to be tilted when loosening the soil. After sampling, the angle of the blade 7 is adjusted to be horizontal, which is more conducive to the blade 7 and the mud-supporting plate 8 covering the bottom surface of the sampling cylinder 2.

[0038] In some specific extended embodiments, an angle sensor is provided between the rotating shaft 4 and the sleeve rod 6. A controller is provided at the output end of the angle sensor. A snap-fit ​​ring is provided at the top end of the sleeve rod 6 and is installed inside the top shell 1. An angle scale and a display screen are provided on the housing near the handle at the top end of the sleeve rod 6. The input end of the display screen is electrically connected to the output end of the controller. During manufacturing, the blade 7 and the toner plate are adjusted to fully cover the bottom of the sampling cylinder 2. In this angle state, the transmitter and receiver ring of the angle sensor, the controller, and the display screen are installed. When the sampling cylinder 2 is completely submerged in the sampling hole, the motor 3 is turned off to make the blade 7 stop. After the blade 7 stops, the angle sensor senses the full coverage state. The angle between the actual position and the horizontal ray between the actual position and the full coverage position and the axis is measured by the angle sensor. The angle sensor transmits the sensed angle to the display screen through the controller, so the operator can know the angle to be rotated. According to the angle scale, the operator rotates the top handle of the sleeve rod 6 or the rotating handle of the rotating rod 5 to achieve the closed state of the sampling tube 2. At the same time, the angle sensor transmits angle data in real time during rotation. The operator can adjust the rotation direction and rotation angle according to the real-time angle data. Multiple receiving points are set on the receiving ring, corresponding to multiple transmitters set in the circumference. With the number of blades 7 and mud-collecting plates 8 set, a single transmitter can randomly correspond to any receiving point.

[0039] To ensure that this device meets the relevant specifications, the diameter of the mud storage tank is set to 100mm, and the volume V_set of the blade 7 and sleeve 6 in the mud storage tank is calculated in advance. The excavation depth S is determined according to the scale, and the volume of the sampled soil can be calculated: V = 100·S - V_set. During the soil sampling operation, the weight M1 of this device is weighed first, and the overall weight M2 is weighed after the soil is taken. The weight of the sampled soil can be effectively obtained: M = M2 - M1. The compaction data can be calculated based on the volume V and weight M of the sampled soil.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the content of this specification should be included within the protection scope of the present invention.

Claims

1. A compaction degree testing sampling device, comprising a sampling cylinder, a mounting shell at the top of the sampling cylinder, a rotating shaft and a motor connected by transmission mounted on the mounting shell, a sleeve rod sleeved between the rotating shaft and the sampling cylinder, a rotating rod movably sleeved on the inner side of the rotating shaft, the bottom ends of the rotating shaft, the sleeve rod and the rotating rod all penetrating the top of the sampling cylinder, the top end of the rotating rod extending out of the top of the mounting shell and provided with a rotating handle, an adjustment slot provided at the bottom of the rotating shaft, a plurality of blades evenly arranged on the rotating rod, the plurality of blades passing through the adjustment slot and distributed along the circumference of the rotating rod at the bottom end of the rotating rod, a plurality of mud-supporting plates of similar height to the blades evenly arranged at the bottom end of the sleeve rod, the total area of ​​all the blades and mud-supporting plates not less than the cross-sectional area of ​​the bottom end of the sampling cylinder; in, The operator adjusts the position of multiple blades by rotating the rotary head handle, so that the blades and mud-collecting plates cooperate to cover the bottom cross-section of the sampling tube, thereby achieving a closed state of the sampling tube after sampling is completed. The plane of the blade intersects the plane of the mud-collecting plate at a 30-degree angle; the blade is rotatably connected to the rotating shaft, and an adjustment component is provided between the blade and the rotating shaft, allowing the blade to make small-amplitude angle adjustments. The adjustment component is a mounting ring located at the bottom of the rotating shaft. Multiple mounting components are mounted on the mounting ring. The mounting end of the blade is rectangular and rotatably mounted within the mounting components. An electromagnet telescopic structure is provided between the other end and the inner wall of the mounting components. The input end of the electromagnet telescopic structure is electrically connected to a controller, which is located inside the top shell. The operator can control the electromagnet telescopic structure by operating the controller, thereby controlling the setting angle of the blade. In this way, the operator can control the blade to be tilted when loosening the soil, and adjust the blade angle to be horizontal after sampling is completed.

2. The compaction degree detection sampling device according to claim 1, characterized in that, The adjustment slot is an I-shaped slot.

3. The compaction degree detection sampling device according to claim 1, characterized in that, The mud-collecting plate is set horizontally, and the blade is set at an angle.

4. The compaction degree testing and sampling device according to claim 1, characterized in that, The mud-collecting plate is tilted in the opposite direction to the rotation direction of the blade.

5. The compaction degree detection sampling device according to claim 1, characterized in that, A drill bit is provided at the bottom end of the rotating shaft, and the blade is positioned at a height higher than the drill bit.

6. The compaction degree testing and sampling device according to claim 1, characterized in that, An angle sensor is provided between the rotating shaft and the sleeve rod. A controller is provided at the output end of the angle sensor. A snap ring is provided at the top end of the sleeve rod. The snap ring is installed inside the top shell. A display screen is provided on the top shell near the handle at the top end of the sleeve rod. The input end of the display screen is electrically connected to the output end of the controller.

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