Sediment and roadbed soil stratified sampler for road drainage system

Abstract

The invention relates to the technical field of environment monitoring and soil surveying equipment, in particular to a road drainage system sediment and roadbed soil stratified sampler which comprises a limiting sleeve, a sampling device and a sampling device. The supporting mechanism is located at the bottom of the limiting sleeve; the stratified sampling mechanism is positioned below the mounting frame; and the anti-pollution and anti-confusion mechanism is positioned on one side of the first sampling barrel. A user rotates a rotating rod to enable a hollow stainless steel drill rod and a drill bit to drill and sample deposits or soil below, and when a first sampling barrel, a second sampling barrel and a third sampling barrel reach a sampling area, the user pulls a shifting block upwards, so that a connecting rod drives a first arc-shaped baffle plate, a second arc-shaped baffle plate and a third arc-shaped baffle plate to move upwards; the negative pressure pump is started, gas in the hollow stainless steel drill rod is pumped out through the negative pressure exhaust pipe, negative pressure is formed in the areas nearby the first sampling barrel, the second sampling barrel and the third sampling barrel, and sediments or soil nearby the first sampling barrel, the second sampling barrel and the third sampling barrel are sucked into the first sampling barrel, the second sampling barrel and the third sampling barrel.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring and soil survey equipment technology, specifically a stratified sampler for road drainage system silt and subgrade soil. Background Technology

[0002] The road drainage system silt and subgrade soil stratified sampler is a professional device used to collect silt and subgrade soil samples at different depths in the road drainage system to analyze their composition, properties and impact on road structure and environment. Its core features are stratified undisturbed sampling and pollution / contamination prevention, and it is suitable for narrow or complex working conditions such as drainage wells, ditches, and subgrades.

[0003] In existing technologies, when some road drainage system silt and subgrade soil stratified samplers are taken out after stratified sampling, the samples are easily confused with silt or soil pollution from other soil layers. This may lead to data distortion, failure of source tracing, misjudgment of engineering projects, and inefficient remediation. Summary of the Invention

[0004] The purpose of this invention is to provide a stratified sampler for road drainage system silt and subgrade soil, in order to solve the problems mentioned in the background art where, after sampling, some stratified samplers for road drainage system silt and subgrade soil are easily contaminated or confused with silt or soil from other soil layers, which may lead to data distortion, failure of traceability, misjudgment of engineering and inefficient remediation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stratified sampler for silt and subgrade soil in a road drainage system, comprising:

[0006] Limiting sleeve, used for limiting the sampling of silt and subgrade soil in layers;

[0007] A support mechanism is located at the bottom of the limiting sleeve. A mounting bracket is fixedly installed at the bottom of the limiting sleeve. A first electric push rod is installed at the bottom of one side of the mounting bracket, and a second electric push rod is installed at the bottom of the other side of the support mechanism. A hollow stainless steel drill rod is installed inside the limiting sleeve. A rotating rod is fixedly installed at the top of the hollow stainless steel drill rod, and a drill bit is fixedly installed at the bottom of the hollow stainless steel drill rod.

[0008] A stratified sampling mechanism is located below the mounting frame. A first sampling cylinder is fixedly installed in the middle of the hollow stainless steel drill rod, a second sampling cylinder is fixedly installed below the first sampling cylinder, and a third sampling cylinder is fixedly installed below the second sampling cylinder.

[0009] The anti-contamination and anti-contamination mechanism is located on one side of the first sampling tube. A first arc-shaped baffle is provided on one side of the first sampling tube, a second arc-shaped baffle is provided on one side of the second sampling tube, and a third arc-shaped baffle is provided on one side of the third sampling tube.

[0010] Preferably, a first auxiliary support is provided on one side of the mounting frame, and an anti-slip pad is fixedly provided at the bottom of the first auxiliary support. The user rotates the rotating rod to allow the hollow stainless steel drill rod and drill bit to drill and sample from the silt or soil below. When the first, second, and third sampling tubes reach the sampling area, the user pulls the lever upward, causing the connecting rod to drive the first, second, and third arc-shaped baffles to move upward. The single lever pull operation synchronously drives the three arc-shaped baffles to move upward through the connecting rod transmission, realizing the synchronous opening of the ports of the first, second, and third sampling tubes. This linkage design avoids the asynchrony of manual operation of each tube, ensuring that the three sampling tubes are simultaneously in the feeding state when they reach the preset depth layer, ensuring the sampling efficiency and layer correspondence accuracy of samples at different depth layers, and adapting to the design goal of "one-time drilling, multi-layer simultaneous sampling".

[0011] Preferably, a second auxiliary support is provided on the side of the mounting frame away from the first auxiliary support. An anti-slip pad is fixedly provided at the bottom of the second auxiliary support. When the negative pressure pump is started, the gas inside the hollow stainless steel drill rod is extracted through the negative pressure suction pipe, creating a negative pressure in the vicinity of the first, second, and third sampling cylinders. This draws nearby silt or soil into the first, second, and third sampling cylinders. At this time, pressing the lever causes the first, second, and third arc-shaped baffles to seal the first and second sampling cylinders. The second and third sampling tubes lock the silt or soil inside the first, second, and third sampling tubes, respectively. Pressing the lever drives the three arc-shaped baffles to completely close the sampling tube ports, forming a physical sealing barrier. This structure directly blocks the contact channels between the samples inside the sampling tubes and the external soil layers and samples from adjacent sampling tubes, fundamentally avoiding the problems of "sample backflow and interlayer mixing during drilling" in traditional sampling. It ensures that silt or subgrade soil at different depths is independently sealed, guaranteeing the purity and original properties of the stratified samples.

[0012] Preferably, a negative pressure pump is fixedly installed on the top of the mounting frame, and an exhaust end is fixedly installed on one side of the negative pressure pump. The negative pressure pump and the hollow stainless steel drill rod are fixedly connected by a negative pressure suction pipe. The fixed connection method can avoid air leakage at the connection between the suction pipe and the drill rod and the negative pressure pump, ensuring that when the negative pressure pump is working, a stable negative pressure field can be quickly formed in the first, second and third sampling cylinder areas through the hollow channel of the hollow drill rod, so as to efficiently adsorb silt with high water content or loose roadbed soil, and solve the problem of "difficult sample adsorption and easy loss" in traditional sampling.

[0013] Preferably, one side of the first arc-shaped baffle is fixedly connected to the connecting rod, one side of the second arc-shaped baffle is fixedly connected to the connecting rod, and one side of the third arc-shaped baffle is fixedly connected to the connecting rod. This prevents contamination or confusion with other silt or soil layers during removal. After sampling, the first electric push rod and the second electric push rod push the mounting frame upward to separate the first sampling cylinder, the second sampling cylinder, and the third sampling cylinder from the silt or soil.

[0014] Preferably, the top of the connecting rod is fixedly connected to the lever, which is located on the outside of the limiting sleeve. The three independent sampling cylinders are equipped with arc-shaped baffles and negative pressure sample locking. After sampling, the baffles close the cylinder opening, and the negative pressure adsorbs the sample. There is no cross-flow or backflow during drilling and retrieval, which completely avoids cross-contamination between layers. The hollow stainless steel drill rod is wear-resistant and corrosion-resistant, and the arc-shaped baffles and seals are reliable. With the negative pressure and sample locking design, the structure and materials are durable. After the sampling cylinder completes adsorption, the arc-shaped baffles simultaneously close the cylinder opening. With the double sample locking effect of negative pressure adsorption, silt or soil at different depths is independently sealed in their respective sampling cylinders. During subsequent cylinder retrieval, the samples from each layer do not contact or cross-flow, completely avoiding the pain points of "sample backflow and interlayer mixing during drilling" in traditional sampling. This ensures the purity and original properties of the layered samples and provides core support for the accuracy of the test data. The first and second electric push rods are used to push the mounting frame upward simultaneously to achieve stable separation of the sampling cylinder from the drill rod and soil layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The user rotates the rotating rod, causing the hollow stainless steel drill rod and drill bit to drill and sample from the silt or soil below. When the first, second, and third sampling tubes reach the sampling area, the user pulls the lever upwards, causing the connecting rod to move the first, second, and third arc-shaped baffles upwards. This activates the negative pressure pump, which extracts gas from inside the hollow stainless steel drill rod through the negative pressure suction pipe, creating a negative pressure in the vicinity of the first, second, and third sampling tubes. This negative pressure draws the nearby silt or soil into the first sampling area. The first, second, and third sampling cylinders are then sampled. At this time, pressing the lever causes the first, second, and third arc-shaped baffles to seal the first, second, and third sampling cylinders, locking the silt or soil inside them. This prevents contamination or confusion with silt or soil from other soil layers during removal. After sampling, the first and second electric push rods push the mounting frame upwards, separating the first, second, and third sampling cylinders from the silt or soil.

[0017] This invention features three independent sampling cylinders combined with arc-shaped baffles and negative pressure sample locking. After sampling, the baffles seal the cylinder opening, and the negative pressure adsorbs the sample. There is no cross-flow or backflow during drilling and retrieval, completely avoiding inter-layer cross-contamination. A single lever pull operation synchronously drives the three arc-shaped baffles upwards via a linkage transmission, achieving simultaneous opening of the first, second, and third sampling cylinder ports. This linkage design avoids the asynchrony of manual cylinder-by-cylinder operation, ensuring that all three sampling cylinders are simultaneously in the feeding state when reaching the preset depth layer. This guarantees the sampling efficiency and layer-level accuracy of different depth layers, adapting to "one-time drilling, multi-layer simultaneous sampling". The design aims to make the hollow stainless steel drill rod wear-resistant and corrosion-resistant, with reliable arc-shaped baffles and seals. Combined with negative pressure and sample-locking design, the structure and materials are durable. After the sampling tube completes adsorption, the arc-shaped baffle simultaneously seals the tube opening. With the dual sample-locking effect of negative pressure adsorption, silt or soil at different depths is independently sealed in their respective sampling tubes. During subsequent tube retrieval, samples from different layers do not contact or cross-flow, completely avoiding the pain points of "sample backflow and interlayer mixing" in traditional sampling. This ensures the purity and original properties of the layered samples, providing core support for the accuracy of the test data. The first and second electric push rods are used to simultaneously push the mounting frame upward to achieve smooth separation of the sampling tube from the drill rod and soil layer. This invention utilizes a pressing lever, driven by a linkage, to synchronously drive three arc-shaped baffles to completely close the sampling cylinder port, forming a physical sealing barrier. This structure directly blocks the contact channels between the sample inside the sampling cylinder and the external soil layer or samples from adjacent sampling cylinders, fundamentally avoiding the problems of "sample backflow and interlayer mixing" in traditional sampling. It ensures that silt or subgrade soil at different depths is independently sealed, guaranteeing the purity and original properties of the layered samples. The fixed connection between the negative pressure pump and the hollow stainless steel drill rod via a negative pressure extraction pipe prevents air leakage at the connection point. This ensures that when the negative pressure pump is working, it can quickly form a stable negative pressure field in the first, second, and third sampling cylinder areas through the hollow channel of the drill rod, efficiently adsorbing high-moisture-content silt or loose subgrade soil, solving the problems of "difficult sample adsorption and easy loss" in traditional sampling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the layered sampling mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the lifting structure of the first and second electric push rods of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the anti-pollution and anti-contamination mechanism of the present invention;

[0022] Figure 5This is a schematic diagram of the connection structure between the hollow stainless steel drill rod and the rotating rod of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure between the drill bit and the third sampling cylinder of the present invention.

[0024] In the picture:

[0025] 1. Limiting sleeve; 3. Hollow stainless steel drill rod; 4. Rotary rod; 5. Drill bit;

[0026] 2. Support mechanism; 201. Mounting bracket; 202. First electric push rod; 203. First auxiliary bracket; 204. Anti-slip mat one; 205. Second electric push rod; 206. Second auxiliary bracket; 207. Anti-slip mat two;

[0027] 6. Layered sampling mechanism; 601. First sampling cylinder; 602. Second sampling cylinder; 603. Third sampling cylinder; 604. Negative pressure pump; 6041. Exhaust end; 605. Negative pressure suction pipe;

[0028] 7. Anti-pollution and anti-confusion mechanism; 701. First arc-shaped baffle; 702. Second arc-shaped baffle; 703. Third arc-shaped baffle; 704. Connecting rod; 705. Pulley. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] like Figures 1-6 As shown, this application provides a stratified sampler for silt and subgrade soil in a road drainage system, including: a limiting sleeve 1, used for limiting the stratified sampling of silt and subgrade soil.

[0032] In this embodiment: the support mechanism 2 is located at the bottom of the limiting sleeve 1. The bottom of the limiting sleeve 1 is fixedly provided with a mounting bracket 201. A first electric push rod 202 is provided on the bottom of one side of the mounting bracket 201, and a second electric push rod 205 is provided on the bottom of the other side of the support mechanism 2. A hollow stainless steel drill rod 3 is provided on the inner side of the limiting sleeve 1. A rotating rod 4 is fixedly provided on the top of the hollow stainless steel drill rod 3, and a drill bit 5 is fixedly provided on the bottom of the hollow stainless steel drill rod 3.

[0033] Specifically, such as Figures 1-6 As shown, a first auxiliary bracket 203 is provided on one side of the mounting bracket 201, and an anti-slip pad 204 is fixedly provided at the bottom of the first auxiliary bracket 203. A second auxiliary bracket 206 is provided on the side of the mounting bracket 201 away from the first auxiliary bracket 203, and an anti-slip pad 207 is fixedly provided at the bottom of the second auxiliary bracket 206.

[0034] In this embodiment: the layered sampling mechanism 6 is located below the mounting frame 201. A first sampling cylinder 601 is fixedly installed in the middle of the hollow stainless steel drill rod 3. A second sampling cylinder 602 is fixedly installed below the first sampling cylinder 601. A third sampling cylinder 603 is fixedly installed below the second sampling cylinder 602.

[0035] Specifically, such as Figures 1-6 As shown, a negative pressure pump 604 is fixedly installed on the top of the mounting bracket 201, and an exhaust end 6041 is fixedly installed on one side of the negative pressure pump 604. The negative pressure pump 604 and the hollow stainless steel drill rod 3 are fixedly connected by a negative pressure suction pipe 605.

[0036] In this embodiment: the anti-contamination and anti-contamination mechanism 7 is located on one side of the first sampling cylinder 601. A first arc-shaped baffle 701 is provided on one side of the first sampling cylinder 601, a second arc-shaped baffle 702 is provided on one side of the second sampling cylinder 602, and a third arc-shaped baffle 703 is provided on one side of the third sampling cylinder 603. Specifically, as shown... Figures 1-6As shown, one side of the first arc-shaped baffle 701 is fixedly connected to the connecting rod 704, one side of the second arc-shaped baffle 702 is fixedly connected to the connecting rod 704, and one side of the third arc-shaped baffle 703 is fixedly connected to the connecting rod 704. The top of the connecting rod 704 is fixedly connected to the lever 705, which is located on the outside of the limiting sleeve 1. The user rotates the rotating rod 4, causing the hollow stainless steel drill rod 3 and drill bit 5 to drill and sample from the silt or soil below. When the first sampling cylinder 601, the second sampling cylinder 602, and the third sampling cylinder 603 reach the sampling area, the user pulls the lever 705 upwards, causing the connecting rod 704 to move the first arc-shaped baffle 701, the second arc-shaped baffle 702, and the third arc-shaped baffle 703 upwards. The negative pressure pump 604 starts, and the gas inside the hollow stainless steel drill rod 3 is extracted through the negative pressure suction pipe 605. 1. A negative pressure is formed in the area near the second sampling tube 602 and the third sampling tube 603, drawing the nearby silt or soil into the first sampling tube 601, the second sampling tube 602, and the third sampling tube 603. At this time, pressing the lever 705 causes the first arc-shaped baffle 701, the second arc-shaped baffle 702, and the third arc-shaped baffle 703 to seal the first sampling tube 601, the second sampling tube 602, and the third sampling tube 603, locking the silt or soil inside the first sampling tube 601, the second sampling tube 602, and the third sampling tube 603. This prevents contamination or confusion with silt or soil from other soil layers when it is removed. After sampling, the first electric push rod 202 and the second electric push rod 205 push the mounting frame 201 upward, separating the first sampling tube 601, the second sampling tube 602, and the third sampling tube 603 from the silt or soil.

[0037] Specifically, the user rotates the rotating rod 4, causing the hollow stainless steel drill rod 3 and drill bit 5 to drill and sample from the silt or soil below. When the first sampling cylinder 601, the second sampling cylinder 602, and the third sampling cylinder 603 reach the sampling area, the user pulls the lever 705 upwards, causing the connecting rod 704 to move the first arc-shaped baffle 701, the second arc-shaped baffle 702, and the third arc-shaped baffle 703 upwards. The negative pressure pump 604 starts, extracting the gas inside the hollow stainless steel drill rod 3 through the negative pressure suction pipe 605, creating a negative pressure in the vicinity of the first sampling cylinder 601, the second sampling cylinder 602, and the third sampling cylinder 603, drawing the nearby silt or soil into the first sampling cylinder 601. When the second sampling tube 602 and the third sampling tube 603 are used, the lever 705 is pressed, causing the first arc-shaped baffle 701, the second arc-shaped baffle 702 and the third arc-shaped baffle 703 to seal the first sampling tube 601, the second sampling tube 602 and the third sampling tube 603, locking the silt or soil inside the first sampling tube 601, the second sampling tube 602 and the third sampling tube 603. When they are taken out, this prevents them from being contaminated or mixed with the silt or soil in other soil layers. After sampling is completed, the first electric push rod 202 and the second electric push rod 205 push the mounting frame 201 to move upward, separating the first sampling tube 601, the second sampling tube 602 and the third sampling tube 603 from the silt or soil.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0039] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A stratified sampler for silt and subgrade soil in a road drainage system, characterized in that, include: Limiting sleeve (1) is used for limiting the sampling of silt and subgrade soil in layers; The support mechanism (2) is located at the bottom of the limiting sleeve (1). The bottom of the limiting sleeve (1) is fixedly provided with a mounting bracket (201). A first electric push rod (202) is provided on one side of the mounting bracket (201), and a second electric push rod (205) is provided on the other side of the support mechanism (2). A hollow stainless steel drill rod (3) is provided on the inner side of the limiting sleeve (1). A rotating rod (4) is fixedly provided on the top of the hollow stainless steel drill rod (3), and a drill bit (5) is fixedly provided on the bottom of the hollow stainless steel drill rod (3). The layered sampling mechanism (6) is located below the mounting frame (201). A first sampling cylinder (601) is fixedly installed in the middle of the hollow stainless steel drill rod (3). A second sampling cylinder (602) is fixedly installed below the first sampling cylinder (601). A third sampling cylinder (603) is fixedly installed below the second sampling cylinder (602). The anti-pollution and anti-confusion mechanism (7) is located on one side of the first sampling tube (601). A first arc-shaped baffle (701) is provided on one side of the first sampling tube (601), a second arc-shaped baffle (702) is provided on one side of the second sampling tube (602), and a third arc-shaped baffle (703) is provided on one side of the third sampling tube (603).

2. The road drainage system silt and subgrade soil layer sampler according to claim 1, characterized in that, The mounting bracket (201) is provided with a first auxiliary bracket (203) on one side, and an anti-slip pad (204) is fixedly provided at the bottom of the first auxiliary bracket (203).

3. A road drainage system silt and subgrade soil stratification sampler according to claim 1, characterized in that, The mounting bracket (201) is provided with a second auxiliary bracket (206) on the side away from the first auxiliary bracket (203), and an anti-slip pad (207) is fixedly provided at the bottom of the second auxiliary bracket (206).

4. A road drainage system silt and subgrade soil stratification sampler according to claim 3, characterized in that, A negative pressure pump (604) is fixedly installed on the top of the mounting bracket (201), and an exhaust end (6041) is fixedly installed on one side of the negative pressure pump (604). The negative pressure pump (604) is fixedly connected to the hollow stainless steel drill rod (3) through a negative pressure suction pipe (605).

5. A road drainage system silt and subgrade soil stratification sampler according to claim 1, characterized in that, One side of the first arc-shaped baffle (701) is fixedly connected to the connecting rod (704), one side of the second arc-shaped baffle (702) is fixedly connected to the connecting rod (704), and one side of the third arc-shaped baffle (703) is fixedly connected to the connecting rod (704).

6. A road drainage system silt and subgrade soil stratification sampler according to claim 4, characterized in that, The top of the connecting rod (704) is fixedly connected to the lever (705), which is located on the outside of the limiting sleeve (1).

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