Silty clay area soil sampling device

Abstract

The utility model provides a silty clay area soil sampling device which comprises a cantilever beam, two groups of positioning frames, a hydraulic push rod, a sampling rod, an extrusion mechanism and a sampling drill bit, the two groups of positioning frames are respectively positioned on two sides of the cantilever beam in the length direction, the positioning frames are fixedly connected with the cantilever beam, and the hydraulic push rod is arranged on the hydraulic push rod. The hydraulic push rod is located in the center of the lower side of the suspension beam and can stretch out and draw back by changing the pressure intensity of the hydraulic push rod, and the sampling rod is fixedly arranged at the telescopic end of the hydraulic push rod. According to the scheme, the sampling drill bit is driven to move relative to the sampling rod, so that the sampling drill bit drives silty clay to move into the closed cavity and close the closed cavity, and the condition that the silty clay in other deep soil layers pollutes sample soil due to high viscosity and high water content of the silty clay is prevented; therefore, more accurate and representative soil samples are obtained, and reliable data support is provided for geological analysis and evaluation.

Description

Technical Field

[0001] The utility model relates to the technical field of land sampling equipment, in particular to a soil sampling device for silty clay areas. Background Art

[0002] In the fields of geological exploration, environmental assessment, agricultural research, and civil engineering, soil sampling is an important means to obtain soil characteristic information, conduct geological analysis and evaluation. Especially in silty clay areas, due to the special physical and chemical properties of the soil, the sampling process needs to be particularly cautious to ensure that the samples obtained are representative and not interfered by external factors.

[0003] Traditional soil sampling methods, such as manual digging or using simple sampling tools, often have problems such as limited sampling depth, uneven sampling, and easy contamination of samples. In addition, silty clay makes the sampling process more difficult due to its high viscosity and high water content, and it is easy to have problems such as the sampler failing to penetrate deeply and the sample deforming during the retrieval process. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a soil sampling device for silty clay areas, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a soil sampling device for silty clay areas, including a cantilever beam, a positioning frame, a hydraulic push rod, a sampling rod, a squeezing mechanism and a sampling drill bit, the positioning frame is provided with two groups and is respectively located on both sides of the length direction of the cantilever beam, the positioning frame is fixedly connected to the cantilever beam, the hydraulic push rod is located at the center of the lower side of the cantilever beam, the hydraulic push rod can be extended and retracted by changing its own pressure, the sampling rod is fixedly arranged at the telescopic end of the hydraulic push rod, a closed cavity is opened in the center of the sampling rod, the sampling drill bit is arranged on the lower side of the sampling rod, the squeezing mechanism is arranged between the sampling drill bit and the sampling rod, and the squeezing mechanism is used to allow the sample soil to pass between the sampling rod and the sampling drill bit.

[0008] Preferably, the inner diameter of the lower end of the closed cavity gradually increases from top to bottom, and the outer circumferential surface of the sampling rod is a smooth curved surface.

[0009] Preferably, a synchronous cavity communicating with the closed cavity is provided in the sampling rod, and a lifting slide groove penetrating the synchronous cavity is provided in the sampling rod, and the lifting slide grooves are provided in four groups.

[0010] Preferably, the extrusion mechanism includes a power assembly, a fixed ring seat, a steady-state gear, a driven gear and a lifting screw, the fixed ring seat is fixedly arranged at the center of the synchronous cavity, the fixed ring seat coincides with the axis of the sampling rod, the steady-state gear is rotatably connected to the outer cylindrical surface of the fixed ring seat, the driven gear corresponds to the lifting slide groove, and the driven gear is rotatably connected to the upper wall of the synchronous cavity through a driven rotating shaft, the driven gear and the driven gear are both provided with a through cavity, the lifting slide groove is connected with the driven gear and the through cavity inside the driven rotating shaft, the power assembly is arranged between the steady-state gear and the driven gear, the power assembly is used to drive the four groups of driven gears to rotate synchronously, the lifting screw is threadedly connected in the lifting slide groove, the lower end of the lifting screw is rotatably connected to the upper end surface of the sampling drill bit, and the lifting screw passes through the driven rotating shaft and the driven gear and is connected by a key.

[0011] Preferably, the power assembly includes a power motor, a transmission shaft and a driving gear, the outer cylindrical surface of the driven gear and the outer cylindrical surface of the steady-state gear are both provided with threads, the driving gear is meshed between the driven gear and the steady-state gear, the power motor is arranged in the sampling rod, the transmission shaft is power-connected to the power output end of the power motor, and the driving gear is fixedly arranged at the lower end of the transmission shaft.

[0012] (III) Beneficial effects

[0013] The utility model provides a soil sampling device for silty clay areas. It has the following beneficial effects:

[0014] 1. This scheme drives the sampling drill bit to move relative to the sampling rod, so that the sampling drill bit drives the silty clay to move into the closed cavity and seals the closed cavity, preventing the silty clay from other deep soil layers from contaminating the sample soil due to its high viscosity and high water content, thereby obtaining more accurate and representative soil samples and providing reliable data support for geological analysis and evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 11, suspension beam; 12, positioning frame; 13, hydraulic push rod; 14, sampling rod; 15, closed chamber; 16, synchronous chamber; 17, lifting slide; 20, sampling drill bit; 21, fixed ring seat; 22, steady-state gear; 23, transmission shaft; 24, driving gear; 25, driven gear; 26, driven shaft; 27, lifting screw. DETAILED DESCRIPTION

[0019] The utility model provides a soil sampling device for silty clay areas, such as Figure 1-2 As shown, it includes a suspension beam 11, a positioning frame 12, a hydraulic push rod 13, a sampling rod 14, an extrusion mechanism and a sampling drill 20. The positioning frame 12 is provided with two groups and is respectively located on both sides of the length direction of the suspension beam 11. The positioning frame 12 is fixedly connected to the suspension beam 11. The positioning frame 12 is fixed to the sampling position on the ground by a ground nail. The hydraulic push rod 13 is located at the center of the lower side of the suspension beam 11. The hydraulic push rod 13 has the same structure as the prior art. The hydraulic push rod 13 can be extended and retracted by changing its own pressure. The sampling rod 14 is fixed at the telescopic end of the hydraulic push rod 13, a closed cavity 15 is opened at the center of the sampling rod 14, a sampling drill bit 20 is arranged at the lower side of the sampling rod 14, and an extrusion mechanism is arranged between the sampling drill bit 20 and the sampling rod 14. The extrusion mechanism is used to allow the sample soil to pass between the sampling rod 14 and the sampling drill bit 20. Since the plasticity index of silty clay is greater than 10 and less than or equal to the lifting chute 17, the sample soil is squeezed through the sampling drill bit 20 into the closed cavity 15 for sampling.

[0020] The inner diameter of the lower end of the closed cavity 15 gradually increases from top to bottom. Since the outer circumferential surface of the sampling rod 14 is a smooth curved surface, it is convenient for the sampling rod 14 to drive the sampling drill bit 20 to probe into the silty clay.

[0021] A synchronous cavity 16 communicating with the closed cavity 15 is provided in the sampling rod 14 , and a lifting chute 17 penetrating the synchronous cavity 16 is provided in the sampling rod 14 , and four groups of the lifting chute 17 are provided.

[0022] like Figure 2-Figure 3As shown, the extrusion mechanism includes a power assembly, a fixed ring seat 21, a steady-state gear 22, a driven gear 25 and a lifting screw 27. The fixed ring seat 21 is fixedly arranged at the center of the synchronous cavity 16. The fixed ring seat 21 coincides with the axis of the sampling rod 14. The steady-state gear 22 is rotatably connected to the outer circumferential surface of the fixed ring seat 21. The driven gear 25 corresponds to the lifting slide groove 17. The driven gear 25 is rotatably connected to the upper wall of the synchronous cavity 16 through the driven rotating shaft 26. The driven gear 25 and the driven gear 25 are both provided with a through cavity. The lifting screw 27 is provided with a driven rotating shaft 26. The lowering chute 17 is connected to the internal cavity of the driven gear 25 and the driven rotating shaft 26. The power component is arranged between the steady-state gear 22 and the driven gear 25. The power component is used to drive the four groups of driven gears 25 to rotate synchronously. The outer cylindrical surface of the lifting screw 27 and the inner wall of the lifting chute 17 are both provided with threads. The lifting screw 27 is threadedly connected to the lifting chute 17. The lower end of the lifting screw 27 is rotatably connected to the upper end surface of the sampling drill bit 20. The lifting screw 27 passes through the driven rotating shaft 26 and the driven gear 25 and is connected by a key.

[0023] The power assembly includes a power motor, a transmission shaft 23 and a driving gear 24. The outer circumferential surface of the driven gear 25 and the outer circumferential surface of the steady-state gear 22 are both provided with threads. The driving gear 24 is meshed between the driven gear 25 and the steady-state gear 22. The power motor is arranged in the sampling rod 14. The transmission shaft 23 is connected to the power output end of the power motor. The driving gear 24 is fixedly arranged at the lower end of the transmission shaft 23.

[0024] In the initial state, the sampling drill bit 20 is close to the sampling rod 14. After the suspension beam 11 is fixed to the ground through the positioning frame 12, the hydraulic push rod 13 is started. The hydraulic push rod 13 drives the sampling rod 14 to rise and fall through telescoping. The hydraulic push rod 13 pushes the sampling drill bit 20 into the soil through the sampling rod 14. When the sampling rod 14 moves to the depth to be sampled, the power motor is started. The power motor drives the driving gear 24 to rotate through the transmission shaft 23. The driving gear 24 drives the steady-state gear 22 to rotate through the gear meshing. At the same time, the driving gear 24 drives the driven gear 25 to rotate. The driven gear 25 and the driven rotating shaft 26 drive the lifting screw 27 to rotate synchronously relative to the sampling drill bit 20 through the key. The lifting screw 27 moves axially relative to the sampling rod 14 through the outer cylindrical thread, thereby driving the sampling drill bit 20 to move away from and close to the sampling rod 14.

[0025] When the sampling drill bit 20 is away from the sampling rod 14, the sampling drill bit 20 breaks the soil away from one end of the sampling rod 14. At this time, the silty clay falls between the sampling rod 14 and the sampling drill bit 20. When the sampling drill bit 20 moves back to the initial state, the sampling drill bit 20 drives the silty clay to move into the closed cavity 15 and closes the closed cavity 15 to prevent the silty clay in other deep soil layers from contaminating the sample soil.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for silty clay areas, characterized in that: The invention comprises a suspension beam (11), a positioning frame (12), a hydraulic push rod (13), a sampling rod (14), a squeezing mechanism and a sampling drill bit (20); the positioning frame (12) is provided with two groups and is respectively located at both sides of the length direction of the suspension beam (11); the positioning frame (12) is fixedly connected to the suspension beam (11); the hydraulic push rod (13) is located at the center of the lower side of the suspension beam (11); the hydraulic push rod (13) can be extended and retracted by changing its own pressure; the sampling rod (14) is fixedly arranged at the telescopic end of the hydraulic push rod (13); a closed cavity (15) is opened at the center of the sampling rod (14); the sampling drill bit (20) is arranged at the lower side of the sampling rod (14); the squeezing mechanism is arranged between the sampling drill bit (20) and the sampling rod (14); the squeezing mechanism is used to make the sample soil pass between the sampling rod (14) and the sampling drill bit (20).

2. A soil sampling device for silty clay areas according to claim 1, characterized in that: The inner diameter of the lower closing portion of the closed cavity (15) gradually increases from top to bottom, and the outer circumferential surface of the sampling rod (14) is a smooth curved surface.

3. The soil sampling device for silty clay area according to claim 1, characterized in that: The sampling rod (14) is provided with a synchronous cavity (16) in communication with the closed cavity (15), and the sampling rod (14) is provided with a lifting chute (17) penetrating the synchronous cavity (16), and the lifting chute (17) is provided in four groups.

4. The soil sampling device for silty clay area according to claim 3, characterized in that: The extrusion mechanism comprises a power assembly, a fixed ring seat (21), a steady-state gear (22), a driven gear (25) and a lifting screw (27); the fixed ring seat (21) is fixedly arranged at the center of the synchronous cavity (16); the fixed ring seat (21) coincides with the axis of the sampling rod (14); the steady-state gear (22) is rotatably connected to the outer circumferential surface of the fixed ring seat (21); the driven gear (25) corresponds to the lifting slide groove (17); the driven gear (25) is rotatably connected to the upper wall of the synchronous cavity (16) through a driven rotating shaft (26); the driven gear (25) and the driven gear (27) are rotatably connected to the upper wall of the synchronous cavity (1 ...) through a driven rotating shaft (26); the driven gear (25) and the driven gear (27) are rotatably connected to the upper wall of the synchronous cavity (16) through a driven rotating shaft (26); the driven gear (25) and (25) are provided with a through cavity, the lifting chute (17) is connected with the internal through cavity of the driven gear (25) and the driven rotating shaft (26), the power component is arranged between the steady-state gear (22) and the driven gear (25), the power component is used to drive the four groups of driven gears (25) to rotate synchronously, the lifting screw (27) is threadedly connected in the lifting chute (17), the lower end of the lifting screw (27) is rotatably connected with the upper end surface of the sampling drill bit (20), the lifting screw (27) passes through the driven rotating shaft (26) and the driven gear (25) and is connected by a key.

5. The soil sampling device for silty clay area according to claim 4, characterized in that: The power assembly comprises a power motor, a transmission shaft (23) and a driving gear (24); the outer circumferential surface of the driven gear (25) and the outer circumferential surface of the steady-state gear (22) are both provided with threads; the driving gear (24) is meshed between the driven gear (25) and the steady-state gear (22); the power motor is arranged in the sampling rod (14); the transmission shaft (23) is connected to the power output end of the power motor; and the driving gear (24) is fixedly arranged at the lower end of the transmission shaft (23).

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