Split hydraulic propelling split double cylinder undisturbed soil sampling device

Abstract

The utility model discloses a split type double -cylinder undisturbed soil sampling device of separate type hydraulic pressure propulsion belongs to soil sampling and geological exploration equipment technical field. Split type double -cylinder undisturbed soil sampling device of separate type hydraulic pressure propulsion includes outer tube, separable sampling cylinder, self -stabilizing counterforce support structure and hydraulic pressure propulsion system. The outer tube lower extreme is equipped with the blade mouth, and the upper end is equipped with the propulsion connecting cover, separable sampling cylinder is by two half circular cylinder that can be separated along the axial component, and the self -stabilizing counterforce support structure is used for supporting whole device with split type hydraulic pressure propulsion system and realizes the outer tube steady, undisturbed axial into the earth. The device propulsion force controllable, into the earth steady, little disturbance, and sample keep the integrity is high, is suitable for the undisturbed soil sampling of various strata, adapts different cylinder diameter module, and promotes the versatility and the on -the -spot efficiency.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling and geological exploration equipment technology, specifically to a split-type double-cylinder undisturbed soil sampling device with separate hydraulic propulsion for obtaining undisturbed soil samples in geological exploration, environmental soil testing and frozen soil engineering. Background Technology

[0002] In the early stages of geotechnical engineering and civil construction, it is necessary to sample and test the foundation soil to understand its physical properties, moisture content, and mechanical parameters, providing a basis for engineering design and safety assessment. Traditional undisturbed soil samplers mostly employ single-tube sampling or manual tapping sampling methods. Although simple in structure, they suffer from the following major drawbacks: significant soil disturbance upon entry and low sampling accuracy. Manual or mechanical tapping methods struggle to maintain stable propulsion force and speed, leading to soil impact disturbance and disruption of the undisturbed structure, thus affecting the accuracy of test results. Poor sample integrity and easy slippage or deformation are also issues. The high friction during extraction of single-tube sampling structures makes samples prone to tearing or compression, failing to maintain their true shape, especially noticeable in saturated, soft, or frozen soil conditions. Inaccurate propulsion control is another problem. Existing devices generally lack constant speed or constant force control systems, resulting in unstable propulsion rates that easily cause sample shear damage, affecting undisturbed integrity. Furthermore, the sampling device itself is unstable. Most sampling devices rely on manual labor or simple supports to provide reaction force, making them prone to tilting or swaying upon entry, affecting sampling verticality and repeatability. Finally, the separation process is complex. Traditional integral samplers require manual digging or tapping to separate the sample after sampling, which is not only time-consuming and labor-intensive but may also damage the sample's surface structure.

[0003] Therefore, there is an urgent need for a compact, stable, low-disturbance, and self-stabilizing soil sampling device to enable high-quality sampling under different soil conditions. Utility Model Content

[0004] The purpose of this utility model is to provide a split-type double-cylinder undisturbed soil sampling device with a split hydraulic propulsion system. This device achieves stable propulsion, low-disturbance cutting, and intact sample preservation during the sampling process through a split hydraulic propulsion system, a self-stabilizing reaction force support structure, and a detachable sampling cylinder design. This solves the problems of unstable soil entry, sample damage, and cumbersome operation in the prior art.

[0005] This utility model is implemented using the following technical solution: A split-type double-cylinder undisturbed soil sampling device with detachable hydraulic propulsion consists of an outer cylinder, a detachable sampling cylinder, a self-stabilizing reaction support structure, and a detachable hydraulic propulsion system.

[0006] Preferably, the separable sampling tube is disposed inside the outer tube and consists of two axially separable semi-cylindrical bodies connected by a locking ring and a push-in connecting cover to form a complete sampling tube. When the soil sample is taken out, it can be pulled out from the outer tube. After the locking ring is released, the tube can be separated, and the soil sample can be taken out without disturbance. The locking ring is located in the middle of the outside of the separable sampling tube, which can tightly connect the separable sampling tube to form a complete sampling tube. After the soil sample is taken out, the locking ring can be released to separate the separable sampling tube, so as to take out the sample without disturbance and completely.

[0007] Preferably, the outer cylinder is a hollow frustum-shaped cylinder that runs vertically through the top and bottom, with a cutting edge at the lower end. Its inner wall slides against the outer wall of the separable sampling cylinder, and its upper end is connected to the propulsion connecting cover. The soil entry power is provided by a separable hydraulic system. It is vertically installed in a self-stabilizing reaction support structure and passes through a limiting guide hole. When entering the soil, it can prevent the inner cylinder sample from being impacted and disturbed, which would damage the original structure of the soil and affect the test results.

[0008] Preferably, the self-stabilizing reaction force support structure includes a base plate, a limiting connecting frame, and a supporting top plate. The base plate is provided with a limiting guide hole, through which the outer cylinder is installed vertically. The limiting connecting frame is distributed on both sides and connected at the top through the supporting top plate to form an overall frame, which is used to provide reaction force support and guide limiting. The structure is stable as a whole and does not tilt or shake, ensuring the verticality of the sampling.

[0009] Preferably, the separate hydraulic propulsion system includes a power unit, a piston rod end, a high-pressure hose, a propulsion connection cover, and a pressure rod. The power unit is connected to the piston rod end through the high-pressure hose. A pressure rod on one side can manually provide hydraulic propulsion force. The piston rod end is connected to the propulsion connection cover, which can push the outer cylinder into the soil. When the piston rod end retracts, it brings the outer cylinder out, reducing disturbance when manually removing soil samples. The system is equipped with a throttle valve and a pressure limiting valve, which can achieve constant speed or constant force control for soil entry.

[0010] This utility model provides a split-type, hydraulically propelled, dual-cylinder undisturbed soil sampling device, which has the following beneficial effects: 1. Stable entry into the soil with minimal disturbance: The hydraulically controlled propulsion method effectively reduces sampling disturbance and maintains the original soil structure.

[0011] 2. High sampling integrity: The dual-cylinder split structure design separates the sample from the cutting process. When pulled out, the outer cylinder provides protection, while the inner cylinder maintains the original shape of the sample, avoiding deformation and detachment.

[0012] 3. Convenient sample retrieval: The detachable sampling tube design allows for quick unlocking via a locking ring, enabling complete sample retrieval without the need for knocking or cutting, greatly improving field sampling efficiency.

[0013] 4. Structural stability: The self-stabilizing reaction force support structure forms a reaction force closed loop through the base plate, the limiting connecting frame and the supporting top plate. The device maintains vertical balance during the pushing and pulling process and does not require ground anchor fixation.

[0014] 5. High versatility and safety: System operators are kept away from the stress area, improving safety; the same system is compatible with multiple cylinder diameters and sampling modules.

[0015] 6. Easy to operate and highly controllable: The hydraulic system can be adjusted manually or automatically to adapt to different types of soil layers (such as soft soil, frozen soil, sandy soil, etc.) and achieve sampling control with good repeatability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A diagram of a split-type double-cylinder undisturbed soil sampling device with separate hydraulic propulsion. Figure 2 This is a schematic diagram of a detachable sampling cylinder.

[0018] Icons: 1. Outer cylinder; 2. Separable sampling cylinder; 201. Locking ring; 301. Base plate; 302. Limiting connecting frame; 303. Supporting top plate; 304. Positioning plate; 305. Limiting guide hole; 306. Bolt; 401. Power unit; 402. Propulsion connecting cover; 403. Piston rod end; 404. High-pressure hose; 405. Pressure rod. Detailed Implementation

[0019] To more clearly describe the purpose, technical solution, and advantages of this utility model, the embodiments will be described in detail below. Please note that the embodiments described are only some embodiments of this utility model, not all embodiments. Based on these embodiments, those skilled in the art can obtain other embodiments without creative effort, and these embodiments also fall within the protection scope of this utility model. The technical solution of this utility model is shown in the accompanying drawings. According to the drawings, this embodiment relates to a split-type hydraulically propelled split-type dual-cylinder undisturbed soil sampling device, aiming to solve the problems existing in existing undisturbed soil sampling devices.

[0020] This embodiment discloses a split-type double-cylinder undisturbed soil sampling device with separate hydraulic propulsion. The structure consists of an outer cylinder 1, a separable sampling cylinder 2, a self-stabilizing reaction support structure 3, and a separate hydraulic propulsion system 4.

[0021] The separable sampling cylinder 2 consists of two axially separable semi-cylindrical bodies. After assembly, the outer diameter is preferably 80mm, the inner diameter is 76mm, the wall thickness is 2mm, and the height is 300~330mm. The splicing edge is equipped with positioning tenons to ensure that the two semi-cylindrical bodies fit tightly together and prevent soil sample damage. 316L stainless steel is used to reduce weight while meeting the rigidity requirements. The inner wall is coated with DLC, and the inner surface roughness Ra≤0.8 reduces the adhesion and friction between the sample and the inner wall. The locking ring 201 is located in the middle of the separable sampling cylinder 2, with a thickness of 5mm and a width of 20mm. The inner wall fits tightly with the outer wall of the separable sampling cylinder 2. When clamped, it ensures that the two semi-cylindrical bodies fit tightly together. After unlocking, the two semi-cylindrical bodies can be smoothly separated to achieve sampling and release without impact.

[0022] The outer cylinder 1 is a hollow frustum-shaped cylinder that runs vertically through the top and bottom. The outer diameter of the upper end is 88mm and the inner diameter is 84mm. The outer diameter of the lower end is 85mm and the inner diameter is 81mm. The height is the same as that of the separable sampling cylinder 2, which is 300~330mm. The wall thickness is 2mm. The lower end is provided with a cutting edge. The cutting edge area is induction hardened to improve its strength. The inner wall of the outer cylinder 1 slides and fits against the outer wall of the separable sampling cylinder 2. When it is inserted into the soil, it undertakes the triple functions of cutting into the soil, external protection and guidance, reducing lateral disturbance and shear damage.

[0023] The self-stabilizing reaction support structure 3 is composed of a base plate 301, a limiting connecting frame 302, a supporting top plate 303, a positioning plate 304, a limiting guide hole 305, and bolts 306. The base plate 301 is made of Q235B steel plate, with dimensions of 500×400×15mm. Rubber feet (8mm thick) are welded to the four corners of the bottom surface, or detachable counterweights (5kg×4 each) are installed. The surface is sandblasted and coated with epoxy primer for rust prevention. A limiting guide hole 305 is located in the center of the base plate 301; in this embodiment, the hole diameter is 90mm. The limiting connecting frame 302 consists of two square steel columns (40×40×3mm, 800mm high) welded to the base plate 301. Triangular reinforcing ribs (6mm thick, 80mm high, 120mm long) are welded to the inner side of the columns. The top plate 303 is made of Q235B steel plate with dimensions of 260×120×10 mm. It is connected to the top of the limiting connecting frame 302 by four M10 bolts 306. The lower surface of the top plate 303 is inlaid with 45# steel load-bearing pads 406 with a thickness of 5 mm as the bearing surface. The positioning plate 304 is made of Q235B steel plate with dimensions of 260×100×8 mm. It is located about 100 mm below the top plate 303 and is connected to the limiting connecting frame 302 by four M8 bolts 306. The center is coaxially provided with a limiting guide hole 305 with the same diameter as the limiting guide hole 305 of the bottom plate 301, which can fix the piston rod end 403 between the top plate 303 and the positioning plate 304.

[0024] The detachable hydraulic propulsion system 4 consists of a power unit 401, a propulsion connection cover 402, a piston rod end 403, a high-pressure hose 404, and a pressure rod 405. The power unit 401 is a detachable hydraulic jack equipped with a needle valve and an overflow valve to achieve constant speed and pressure-limited propulsion, minimizing soil disturbance and preventing damage to the original soil structure from impacts. The propulsion connection cover 402 has an outer diameter of 90mm and a thickness of 10mm. Two circular positioning grooves, 2mm deep and 2mm wide, are formed on its lower surface to position the outer cylinder 1 and the detachable sampling cylinder 2 within these grooves, thus securing the detachable sampling cylinder 2. This design prevents the detachable sampling cylinder 2 from separating and allows the outer cylinder 1 and the detachable sampling cylinder 2 to enter the soil simultaneously, avoiding misalignment. The piston rod end 403 is installed between the steel force-bearing pad 406 and the positioning plate 304 on the supporting top plate 303, transmitting the thrust from the power body 401 to the outer cylinder 1 via the push-in connecting cover 402 to achieve soil sampling. The high-pressure hose 404 is a double steel wire braided rubber hose with a rated pressure of 28MPa, arranged along the outside of the limiting connecting frame 302 to avoid interfering with the operating area. The pressure rod 405 is located on one side of the power body 401, allowing for manual power supply and easy portability.

[0025] In the original soil sampling area, place the base plate 301 at the sampling point and level it. Install the supporting top plate 303 and the positioning plate 304 to complete the installation of the self-stabilizing reaction support structure 3. Insert the outer cylinder 1 and the separable sampling cylinder 2 and lock them with the locking ring 201. Position the propulsion connecting cover 402 to the upper end of the outer cylinder 1 and the separable sampling cylinder 2. Connect the piston rod end 403 to the propulsion connecting cover 402. Close the return oil valve, slowly pressurize, and the piston rod end 403 moves downward. The thrust passes through the piston rod end 403 to the propulsion connecting cover 402. With cap 402 attached, push outer cylinder 1 into the soil, and detachable sampling cylinder 2 follows. After reaching the target depth, stop pressurizing, slowly open the return oil valve to release pressure, piston rod end 403 returns to its original position, bringing back push connecting cap 402, and simultaneously bringing out outer cylinder 1 and detachable sampling cylinder 2, reducing the interference of manual removal on the original soil. Release the quick-release buckle between piston rod end 403 and push connecting cap 402, remove push connecting cap 402, remove outer cylinder 1, loosen locking ring 201, and the two semi-cylinders separate to obtain the original soil sample column.

[0026] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "support", "backfill", and "reverse filter" should be interpreted broadly, and "up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split-type dual-cylinder undisturbed soil sampling device with separate hydraulic propulsion, characterized in that, The original soil sampling device includes an outer cylinder (1), a separable sampling cylinder (2), a self-stabilizing reaction support structure (3), and a separable hydraulic propulsion system (4); wherein, the separable sampling cylinder (2) is composed of two axially separable semi-cylindrical bodies, the cylinder body is provided with a tenon and mortise structure, and is set inside the outer cylinder (1), and is connected by a locking ring (201) and a propulsion connecting cover (402) to form a complete sampling cylinder body; the locking ring (201) is located in the middle position outside the separable sampling cylinder (2).

2. The split-type hydraulically propelled dual-cylinder undisturbed soil sampling device according to claim 1, characterized in that, The outer cylinder (1) is a hollow frustum-shaped cylinder that runs vertically through the top and bottom. Its lower inner wall is slidably attached to the outer wall of the separable sampling cylinder (2), and its upper end is connected to the push-connecting cover (402). It is vertically installed in the limiting guide hole (305) of the self-stabilizing reaction support structure (3).

3. The split-type hydraulically propelled dual-cylinder undisturbed soil sampling device according to claim 1, characterized in that, The self-stabilizing reaction force support structure (3) consists of a base plate (301), a limiting connecting frame (302), a supporting top plate (303), a positioning plate (304), a limiting guide hole (305), and bolts (306). The base plate (301) is located at the bottom of the device and is provided with a limiting guide hole (305). Its left and right ends are connected to the bottom of the limiting connecting frame (302). The bottom of the limiting connecting frame (302) is connected to the base plate (301), and the top bolts (306) support the top plate (303). The positioning plate (304) and the limiting connecting frame (302) are connected as a whole; the supporting top plate (303) is located at the top of the device, its two ends are connected to the limiting connecting frame (302), and its bottom is connected to the top of the separate hydraulic propulsion system (4); the positioning plate (304) is located below the supporting top plate (303), its two ends are connected to the limiting connecting frame (302), and a limiting guide hole (305) is provided in the center; the limiting guide hole (305) is located at the center of the bottom plate (301) and the positioning plate (304).

4. The split-type hydraulically propelled dual-cylinder undisturbed soil sampling device according to claim 1, characterized in that, The separate hydraulic propulsion system (4) includes a power unit (401), a propulsion connection cover (402), a piston rod end (403), a high-pressure hose (404), a pressure rod (405), and a force-bearing pad (406); the power unit (401) is located on one side of the self-stabilizing reaction support structure (3) and is connected through the high-pressure hose (404); the propulsion connection cover (402) is circular, with its top connected to the piston rod end (403) by a snap fastener, and its bottom has a groove connected to the outer cylinder (1) and a detachable... The top of the sampling cylinder (2) is fitted; the piston rod end (403) is located between the support top plate (303) and the positioning plate (304), and its lower end is connected to the push connection cover (402) and connected to the power body (401) through the high pressure hose (404); the high pressure hose (404) is connected to the power body (401); the pressure rod (405) is located on one side of the bottom of the power body (401); the force-bearing pad (406) is located between the support top plate (303) and the piston rod end (403).

Images