A soil collection and sampling device for geotechnical engineering
By designing the material conveying cylinder, collection cylinder, and sweeping components, the problem of sampling difficulties caused by soil compression and solidification during drilling was solved, enabling loose soil collection and efficient sampling, and simplifying the operation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST RES INST OF ENG INVESTIGATIONS & DESIGN
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-31
AI Technical Summary
During the sampling process, existing geotechnical drilling equipment can easily cause soil to solidify due to compression, making sampling difficult, especially when soil accumulation is severe, which affects the normal operation of the sampling mechanism.
The system employs a rotatable feed cylinder and drill rod structure, combined with a collection plate and opening/closing device inside the collection cylinder. It utilizes an auger and sweeping components to loosen and agitate the soil and collect it in an orderly manner, preventing the soil from being squeezed during drilling. The opening and closing device controls the opening and closing of the feed inlet to collect samples.
It effectively prevents soil from solidifying during drilling, simplifies sampling operations, improves the collection efficiency of soil samples at different depths, ensures that the soil is loose and easy to sample, and reduces the complexity of sampling.
Smart Images
Figure CN224581159U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of drilling equipment technology, and in particular to a soil collection and sampling device for geotechnical engineering. Background Technology
[0002] Geotechnical engineering is an important branch of civil engineering, mainly studying the engineering properties of soil and rock masses and their interaction with engineering structures. It involves the design, construction, and maintenance of foundations, slopes, tunnels, and underground engineering projects. In geotechnical engineering, the first step in constructing foundations, slopes, tunnels, and underground engineering facilities is to sample and test the underground soil at the construction site to fully assess the soil condition and select an appropriate construction method.
[0003] Patent document CN117948138B discloses a drilling and sampling device for geotechnical engineering exploration, which includes a drill rod and a sampling rod. The sampling rod is located below the drill rod and is fixedly connected to it. A drill bit is provided at the end of the sampling rod. A disc is fixedly connected to the inner wall of the sampling rod. Two sampling scrapers are provided inside the sampling rod. Two sampling ports are evenly opened on the surface of the sampling rod for the two sampling scrapers to extend out respectively.
[0004] However, because the drill rod drives the sampling rod directly into the soil, the soil around the sampling rod is compressed and moves outwards, causing soil accumulation and solidification. If the driving mechanism of the sampling device is not powerful enough, the sampling blade has difficulty reaching into the surrounding soil to collect samples. Furthermore, if the soil itself is severely accumulated and solidified, this type of sampling mechanism will be further affected. Utility Model Content
[0005] To prevent soil from being compressed and solidified when soil sampling devices with sampling ports on the side are inserted into the soil, thus making sampling difficult, this application provides a soil collection and sampling device for geotechnical engineering.
[0006] The soil collection and sampling device for geotechnical engineering provided in this application adopts the following technical solution: A soil collection and sampling device for geotechnical engineering includes a rotatable conveying cylinder and a drill rod rotatably inserted inside the conveying cylinder. The conveying cylinder and the drill rod rotate synchronously. One end of the drill rod extends out of the conveying cylinder and is connected to a drill bit. The end face size of the drill bit is smaller than the cross-sectional size of the conveying cylinder. A collection cylinder is installed inside the conveying cylinder. A material inlet is opened on the side wall of the collection cylinder. A plurality of collection plates are slidably installed at equal intervals along the axis inside the collection cylinder. The collection plate located at the top and not containing a sample is always located below the material inlet. A driving mechanism for moving the plurality of collection plates is installed at the bottom of the collection cylinder. An opening and closing device for closing the material inlet is provided on the collection cylinder at the material inlet position. The opening and closing device is connected to a sweeping component for collecting samples.
[0007] Optionally, the opening and closing device includes a micro motor embedded in the side wall of the collecting cylinder, a micro gear sleeved on the output shaft of the micro motor, and an arc-shaped baffle slidably embedded in the side wall of the collecting cylinder. A rack is arranged on the top side of the arc-shaped baffle, the micro gear has an arc-shaped structure and meshes with the rack, and a groove is opened on the collecting cylinder below the material inlet position, and the arc-shaped baffle is slidably disposed in the groove.
[0008] Optionally, the sweeping assembly includes a mounting plate connected to the end of the arc-shaped baffle away from the micro motor, a sweeping plate hinged to the mounting plate, and a torsion spring with its two ends connected to the mounting plate and the sweeping plate respectively. When the torsion spring is in normal state, the sweeping plate and the arc-shaped baffle are perpendicular to each other. The mounting plate and the end of the arc-shaped baffle are slidably connected along the axis of the collecting cylinder. A push rod is embedded on the top side of the collecting cylinder at the material inlet position. The output shaft of the push rod is connected to the mounting plate. When the push rod is extended, the bottom of the sweeping plate is located in the groove.
[0009] Optionally, the inner wall of the conveying cylinder is provided with a plurality of auger blades at intervals, and the material inlet is located between two adjacent auger blades along the axial direction of the conveying cylinder.
[0010] Optionally, an auger is wound and fixed on the drill rod, with the head and tail of the auger coinciding with the planes of the drill bit and the material conveying cylinder, respectively, along their axes. The cross-sectional diameter of the auger is equal to the diameter of the material conveying cylinder.
[0011] Optionally, the driving mechanism includes a plurality of servo motors installed on the bottom side inside the collecting cylinder. The plurality of servo motors are evenly spaced along the circumference of the collecting cylinder and are all fixedly connected to screws. The plurality of screws are threadedly connected to the collecting plate.
[0012] In summary, this application includes at least one of the following beneficial technical effects: This application improves the structure of a soil collection device for geotechnical engineering, enabling the soil collection device to move the stirred soil into the collection cylinder and discharge it during soil drilling, thereby avoiding the soil being squeezed to the sides of the conveying cylinder and causing soil accumulation and solidification, resulting in sampling difficulties. This application is equipped with multiple collection plates, which can meet the needs of soil sampling at different depths during a single drilling process, greatly reducing the complexity of soil collection and sampling and simplifying the operation process. The application process can loosen the soil, making it easier for the device to sample deep soil. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a soil collection and sampling device for geotechnical engineering according to this application.
[0014] Figure 2 yes Figure 1 Cross-sectional view at point AA.
[0015] Figure 3 This is an overall structural view of the collection cylinder of a soil collection and sampling device for geotechnical engineering according to this application.
[0016] Figure 4 This is a schematic diagram of the connection structure between the sweeping component and the opening and closing device of a soil collection and sampling device for geotechnical engineering according to this application.
[0017] Figure 5 yes Figure 4 A magnified view of point A in the middle.
[0018] Figure 6 This is a schematic diagram of the connection structure of the drive mechanism of a soil collection and sampling device for geotechnical engineering according to this application.
[0019] Explanation of reference numerals in the attached drawings: 1. Feeding cylinder; 11. Screw blade; 2. Drill rod; 21. Drill bit; 22. Screw; 3. Collecting cylinder; 31. Feed inlet; 311. Slide groove; 32. Collecting plate; 4. Sweeping assembly; 41. Mounting plate; 42. Sweeping plate; 43. Torsion spring; 44. Push rod; 5. Drive mechanism; 51. Servo motor; 52. Screw; 6. Opening and closing device; 61. Micro motor; 62. Micro gear; 63. Arc-shaped baffle; 64. Rack. Detailed Implementation
[0020] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0021] This application discloses a soil collection and sampling device for geotechnical engineering.
[0022] Reference Figure 1 and Figure 2 A soil collection and sampling device for geotechnical engineering includes a rotatable conveying cylinder 1 and a drill rod 2 rotatably inserted inside the conveying cylinder 1. The drill rod 2 rotates at the same speed as the conveying cylinder 1, i.e., they rotate synchronously. One end of the drill rod 2 extends outside the conveying cylinder 1 and is connected to a drill bit 21 for drilling. A collection cylinder 3 is fixedly installed inside the conveying cylinder 1, and a material inlet 31 is opened on the side wall of the collection cylinder 3. A sweeping component 4 is provided on the collection cylinder 3 at the material inlet 31. When the drill rod 2 drives the drill bit 21 to rotate, the agitated loose soil can enter the conveying cylinder 1, and then be swept and collected inside the collection cylinder 3 by the sweeping component 4, completing the sample collection step.
[0023] Preferably, an auger 22 with a cross-sectional diameter equal to that of the material conveying cylinder 1 is fixedly wound on the drill rod 2, and the first and last ends of the auger 22 coincide with the planes of the drill bit 21 and the sides of the material conveying cylinder 1 that are close to each other along the axial direction. This design is to allow the soil stirred by the drill bit 21 to enter the material conveying cylinder 1 more smoothly.
[0024] Furthermore, a plurality of collection plates 32 are slidably arranged at equal intervals along the axial direction inside the collection cylinder 3 to hold the soil samples collected in the collection cylinder 3. When no soil samples are held, the uppermost collection plate 32 is positioned below the feed inlet 31. A drive mechanism 5 is provided on the bottom side inside the collection cylinder 3 to drive the plurality of collection plates 32 to move up and down. When sampling soil at different depths sequentially, the drive mechanism 5 drives one collection plate 32 below to the position of the collection plate 32 above it each time, and so on.
[0025] It should be noted that the cross-sectional dimensions of the drill bit 21 in this application should be smaller than the cross-sectional dimensions of the conveying cylinder 1, so as to ensure that the stirred soil can smoothly enter the conveying cylinder 1 and achieve sampling without compacting the soil.
[0026] Reference Figure 3 and Figure 4 Furthermore, the collection cylinder 3 is also equipped with an opening and closing device 6 to keep the material inlet 31 closed during the downward drilling of the sampling device of this application, thus avoiding the accidental collection of samples that do not meet the requirements. The opening and closing device 6 specifically includes a micro motor 61 embedded in the side wall of the collection cylinder 3, a micro gear 62 fixedly sleeved on the output shaft of the micro motor 61, and an arc-shaped baffle 63 that slides horizontally through the side wall of the collection cylinder 3. One end of the arc-shaped baffle 63 slides into the material inlet 31 to prevent soil from entering the collection cylinder 3. A rack 64 is arranged on the top side of the arc-shaped baffle 63, and the rack 64 meshes with the micro gear 62. The sliding of the arc-shaped baffle 63 can be controlled by the micro motor 61, thereby opening or closing the material inlet 31.
[0027] More preferably, a groove 311 is provided on the collecting cylinder 3 at the lower side of the material inlet 31. The arc-shaped baffle 63 is slidably disposed in the groove 311, thereby ensuring that the arc-shaped baffle 63 slides more smoothly.
[0028] Reference Figure 4 and Figure 5 Specifically, the sweeping assembly 4 includes a mounting plate 41 connected to the end of the arc-shaped baffle 63 away from the micro motor 61, a sweeping plate 42 hinged to the mounting plate 41, and a torsion spring 43 connecting the mounting plate 41 and the sweeping plate 42 at both ends respectively. When the torsion spring 43 is in its normal state, the sweeping plate 42 is perpendicular to the arc-shaped baffle 63. In this state, the sweeping plate 42 deflects away from the collection cylinder 3.
[0029] The mounting plate 41 and the end of the arc-shaped baffle 63 are slidably connected along the axis of the collecting cylinder 3, and a push rod 44 is fixedly embedded on the collecting cylinder 3 at the material inlet 31. The output shaft of the push rod 44 is connected to the mounting plate 41 and is used to drive the mounting plate 41 and the sweeping plate 42 hinged to the mounting plate 41 to move up and down along the height direction of the material inlet 31.
[0030] In this application, when the micro motor 61 drives the micro gear 62 to rotate, the arc-shaped baffle 63 slides accordingly, thereby opening the feed inlet 31. At this time, driven by the torsion spring 43 and the push rod 44, the sweeping plate 42 located at the end of the arc-shaped baffle 63 first moves upward, and then rotates outward to block the soil that has moved to the feed inlet 31. As the sampling device continues to drill downward, some of the soil at the feed inlet 31 in the collection cylinder 3 is squeezed and enters the collection plate 32 in the collection cylinder 3.
[0031] Subsequently, as the arc-shaped baffle 63 continues to move, the sweeping plate 42 is pulled and rotates to its original position, aligning with the arc-shaped baffle 63. At this point, the push rod 44 moves again, causing the sweeping plate 42 to enter the chute 311. Finally, the reverse drive of the micro gear 62 causes the arc-shaped baffle 63 to move the sweeping plate 42 to close the material inlet 31.
[0032] It is worth mentioning that during the rotation and reset of the sweeping plate 42, some soil is also carried into the collection plate 32 in the collection cylinder 3, realizing active collection of the sample. Since the soil transported to the conveying cylinder 1 is relatively soft after being stirred, the reset action of the sweeping plate 42 can ensure that the soil can be swept smoothly. The above structure can also ensure that the soil does not clump together, allowing the sample to pass smoothly through the feed port 31.
[0033] Reference Figure 2 and Figure 4Preferably, the inner wall of the conveying cylinder 1 in this application is also provided with a number of auger blades 11 at intervals. The auger blades 11 rotate with the conveying cylinder 1, which plays a role in better discharging the soil. At the same time, the design of the auger blades 11 prevents the soil in the conveying cylinder 1 from being squeezed together, and plays a role in supporting part of the soil, which makes it easier for the sweeping plate 42 to rotate outward and open the material outlet 31 smoothly.
[0034] In order to ensure that the auger blades 11 on the conveying cylinder 1 will not collide with the sweeping plate 42 and cause damage to the sweeping plate 42 structure when they rotate with the conveying cylinder 1, the material inlet 31 is designed to be located between two adjacent auger blades 11. That is, the front and rear ends of the two adjacent auger blades 11 are located on the upper and lower sides of the material inlet 31 respectively along the axial direction of the conveying cylinder 1.
[0035] Reference Figure 6 Specifically, the drive mechanism 5 includes several servo motors 51 that are circumferentially spaced and fixedly installed on the bottom side inside the collection cylinder 3. Each servo motor 51 has a screw 52 fixedly connected to its output shaft, and the servo motors 51 rotate synchronously. Each screw 52 is threaded through several collection plates 32. When the servo motors 51 are working, they can drive the collection plates 32 to move synchronously up and down, ensuring that soil samples from different depths can be collected in a single drilling operation.
[0036] The implementation principle of a soil collection and sampling device for geotechnical engineering according to an embodiment of this application is as follows: This application utilizes the drill rod 2 to drive the drill bit 21 to rotate and move downwards, thereby achieving the soil drilling function. During this process, the stirred soil is continuously fed into the material conveying cylinder 1 by the rotation of the auger 22, and then transported upwards by the rotation of the material conveying cylinder 1 and the drive of the auger blade 11. This achieves the purpose of not compressing the soil during the drilling process, thus avoiding difficulties in sampling and ensuring that the soil has sufficient looseness.
[0037] When soil is moved from the conveying cylinder 1 to the inlet 31, the micro motor 61 drives the micro gear 62 to rotate, thereby moving the arc-shaped baffle 63 and the sweeping plate 42, opening the inlet 31 to facilitate soil entry into the collecting cylinder 3, where it falls onto the collecting plate 32. Simultaneously, when the inlet 31 is open, the push rod 44 drives the mounting plate 41 and the sweeping plate 42 to move upwards and disengage from the chute 311. Then, the sweeping plate 42 rotates outwards under the drive of the torsion spring 43.
[0038] Finally, the micro gear 62 continues to rotate and drives the arc-shaped baffle 63 to continue moving. At this time, the sweeping plate 42 is pulled and will gradually rotate back to its original position and overlap with the arc-shaped baffle 63. Under this condition, the push rod 44 will drive the mounting plate 41 and the sweeping plate 42 to move down, so that the sweeping plate 42 re-enters the slide groove 311. Finally, the micro motor 61 is driven in reverse, which will close the material inlet 31 again.
[0039] As the sampling device moves to different depths, the drive mechanism 5 drives the collection plate 32 to move, so that soil samples at different depths fall onto different collection plates 32 in sequence.
[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A geotechnical soil collection sampling device, characterized by: The device includes a rotatable conveying cylinder (1) and a drill rod (2) rotatably inserted inside the conveying cylinder (1). The conveying cylinder (1) and the drill rod (2) rotate synchronously. One end of the drill rod (2) extends out of the conveying cylinder (1) and is connected to a drill bit (21). The end face size of the drill bit (21) is smaller than the cross-sectional size of the conveying cylinder (1). A collecting cylinder (3) is installed inside the conveying cylinder (1). A material inlet (31) is opened on the side wall of the collecting cylinder (3). The inner edge of the collecting cylinder (3) is... Several collection plates (32) are slidably installed at equal intervals along the axis. The collection plates (32) located at the top and not containing samples are always located below the material inlet (31). A drive mechanism (5) for driving the several collection plates (32) to move is installed at the bottom of the collection cylinder (3). An opening and closing device (6) for closing the material inlet (31) is provided on the collection cylinder (3) at the position of the material inlet (31). The opening and closing device (6) is connected to a sweeping assembly (4) for collecting samples.
2. The soil collection and sampling device for geotechnical engineering according to claim 1, characterized in that: The opening and closing device (6) includes a micro motor (61) embedded in the side wall of the collecting cylinder (3), a micro gear (62) sleeved on the output shaft of the micro motor (61), and an arc-shaped baffle (63) slidably embedded in the side wall of the collecting cylinder (3). A rack (64) is arranged on the top side of the arc-shaped baffle (63). The micro gear (62) has an arc structure and meshes with the rack (64). A groove (311) is opened on the collecting cylinder (3) below the material inlet (31). The arc-shaped baffle (63) is slidably disposed in the groove (311).
3. The soil collection and sampling device for geotechnical engineering according to claim 2, characterized in that: The sweeping assembly (4) includes a mounting plate (41) connected to the end of the arc-shaped baffle (63) away from the micro motor (61), a sweeping plate (42) hinged to the mounting plate (41), and a torsion spring (43) with its two ends connected to the mounting plate (41) and the sweeping plate (42) respectively. When the torsion spring (43) is in normal state, the sweeping plate (42) and the arc-shaped baffle (63) are perpendicular to each other. The mounting plate (41) and the end of the arc-shaped baffle (63) are slidably connected along the axis of the collecting cylinder (3). A push rod (44) is embedded on the top side of the collecting cylinder (3) at the material inlet (31). The output shaft of the push rod (44) is connected to the mounting plate (41). When the push rod (44) is extended, the bottom of the sweeping plate (42) is located in the groove (311).
4. A soil collection and sampling device for geotechnical engineering according to claim 3, characterized in that: The inner wall of the conveying cylinder (1) is provided with a number of auger blades (11) at intervals, and the feed inlet (31) is located between two adjacent auger blades (11) along the axial direction of the conveying cylinder (1).
5. A soil collection and sampling device for geotechnical engineering according to claim 4, characterized in that: A screw conveyor (22) is wound and fixed on the drill rod (2). The head and tail of the screw conveyor (22) coincide with the plane of the side of the drill bit (21) and the material conveying cylinder (1) that are close to each other along the axis. The cross-sectional diameter of the screw conveyor (22) is equal to the diameter of the material conveying cylinder (1).
6. A soil collection and sampling device for geotechnical engineering according to claim 1, characterized in that: The drive mechanism (5) includes a plurality of servo motors (51) installed on the bottom side inside the collection cylinder (3). The plurality of servo motors (51) are evenly distributed along the circumference of the collection cylinder (3) and are all fixedly connected with screws (52). The plurality of screws (52) are all threadedly connected to the collection plate (32).