Geotechnical sampling device for geotechnical engineering investigation

By designing a drill bit divided into a drill barrel and a cover plate, a geotechnical sampling device with a sampling sleeve and a sampling ring knife inside, the problem of sticking between the samples and the drill bit after sampling in the prior art is solved, and the sampling efficiency and sample quality are improved.

CN222913177UActive Publication Date: 2025-05-27HEILONGJIANG AGRI RECLAMATION SURVEY DESIGN & RES INST
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421660182.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-12
Publication Date
2025-05-27
Estimated Expiration
2034-07-12

AI Technical Summary

Technical Problem

After sampling, the existing geotechnical sampling device easily sticks to the inside of the drill bit, resulting in the need to clean the drill bit before each sampling, which takes a long time and affects the sample quality.

Method used

A geotechnical sampling device was designed. The drill bit was divided into two parts: drilling barrel and cover plate. It was equipped with a sampling sleeve and a sampling ring knife. The geotechnical sample and drill bit were isolated through the sampling sleeve and sampling ring knife, avoiding cleaning of the drill bit, and completely pushing out the sample through the material withdrawal plate.

Benefits of technology

Improve sampling efficiency, avoid cleaning of drill bits, and ensure the integrity and quality of samples.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222913177U_ABST
    Figure CN222913177U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of geotechnical engineering investigation equipment, in particular to a geotechnical sampling device for geotechnical engineering investigation, which comprises a driving device and a sampling device, the driving device comprises a first power source, and the first power source is connected with a drill bit through a first drill rod; the drill bit comprises a drilling barrel and a cover plate, and a sampler is arranged in the drilling barrel. According to the sampling device, the drill bit is divided into the drilling barrel and the cover plate, the sampling sleeve and the sampling cutting ring can be installed in the drilling barrel, a rock-soil sample and the drill bit are isolated through the sampling sleeve and the sampling cutting ring, the drill bit can be prevented from being cleaned by replacing the sampling sleeve and the sampling cutting ring, and the sampling efficiency is improved; a rock and soil sample remained in the sampling cutting ring can play a role in sealing the sampling sleeve, so that the integrity of the sample in the sampling sleeve is ensured; the material returning plate is arranged in the sampling sleeve, so that the rock-soil sample in the sampling sleeve can be completely pushed out by pushing the material returning plate, and the integrity of the sample is ensured.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering investigation equipment, in particular to a geotechnical engineering investigation rock sampling device. Background Art

[0002] Geotechnical engineering investigation refers to the activities of identifying, analyzing, evaluating the location, environmental characteristics and geotechnical conditions of the construction site and compiling investigation documents according to the pressure of the construction project. Geotechnical engineering investigation requires rock and soil sampling, and the geological conditions are identified through the analysis of rock and soil samples.

[0003] Sampling is usually carried out using a sampler, which usually includes a sampling drill bit, a drill rod and a power source. The power source is used to drive the drill rod to rotate, thereby driving the sampling drill bit to rotate, applying a downward force to the sampling drill bit, which can enable the sampling drill bit to drill into the soil layer. The bottom of the sampling drill bit is open, and there is a space for storing samples inside. The rock and soil samples enter the sampling drill bit from the opening at the bottom of the sampling drill bit, and then the sampler is lifted, and the sampling drill bit can bring out the rock and soil samples.

[0004] However, after taking samples out from underground, the rock and soil samples will stick to the inside of the sampling drill bit, and the drill bit needs to be cleaned before each sampling to prevent the upper rock and soil from mixing into the lower rock and soil samples, which will affect the sample quality. Therefore, the sampling process takes a long time. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a rock and soil sampling device for geotechnical engineering investigation.

[0006] The technical solution of the utility model is:

[0007] A rock and soil sampling device for geotechnical engineering investigation, comprising:

[0008] A driving device, the driving device comprising a first power source, the first power source being connected to a drill bit via a first drill rod, the first power source being used to drive the drill bit to rotate via the first drill rod;

[0009] The drill bit includes a drilling tube and a cover plate. The drilling tube is connected to the first drill rod through a connecting sleeve and is used to rotate and insert into the soil layer under the drive of the first drill rod. The middle part of the drilling tube is semicircular. The cover plate is clamped with the drilling tube. A sampler is arranged in the drilling tube.

[0010] The sampler comprises a sampling ring cutter, which is clamped and installed inside the head of the drilling tube. A sampling sleeve is placed above the sampling ring cutter and inside the drilling tube, and the sampling sleeve is used to isolate the rock and soil sample from the drilling tube.

[0011] Preferably, the driving device further comprises a mounting frame, the first power source is fixedly mounted in the middle of the top surface of the mounting frame, the output shaft of the first power source passes through the mounting frame and is connected to the first drill rod, and handles are provided on the left and right sides of the top surface of the mounting frame.

[0012] Preferably, a drill rod sleeve is provided at the top of the first drill rod, and the drill rod sleeve is threadedly connected to the output shaft of the first power source.

[0013] Preferably, a mounting slot is provided upwardly through the middle of the drilling tube, a plurality of limiting sleeves are provided on one side of the top of the drilling tube near the opening, and the cover plate is engaged with the mounting slot and fixedly connected with the limiting sleeves by fixing screws.

[0014] Preferably, a limiting ring is provided inside the head of the drilling tube, and a clamping groove is provided at the top of the limiting ring.

[0015] Preferably, a fixing protrusion is provided on the top of the outer side of the sampling ring cutter, the sampling ring cutter is slidably installed in the limiting ring, and the fixing protrusion is adapted to the card slot.

[0016] Preferably, a circular through hole is provided at the top of the sampling sleeve, and a stripping plate is slidably installed in the sampling sleeve. The middle part of the stripping plate protrudes upward and is inserted into the circular through hole and is flush with the top surface of the sampling sleeve.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model divides the drill bit into two parts, a drilling tube and a cover plate, so that a sampling sleeve and a sampling ring can be installed in the drilling tube, and the sampling sleeve and the sampling ring are used to isolate the rock and soil sample and the drill bit. By replacing the sampling sleeve and the sampling ring, the cleaning of the drill bit can be avoided, thereby improving the sampling efficiency; the rock and soil sample remaining in the sampling ring can seal the sampling sleeve, thereby ensuring the integrity of the sample in the sampling sleeve; by arranging a stripping plate in the sampling sleeve, the rock and soil sample in the sampling sleeve can be completely pushed out by pushing the stripping plate, thereby ensuring the integrity of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the driving device in the utility model;

[0021] Figure 3 This is a schematic diagram of the drill bit structure in the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the sampler in the utility model.

[0023] The meaning of each number in the figure is:

[0024] 1. driving device; 11. mounting frame; 12. handle; 13. first power source; 14. first drill rod; 15. drill rod sleeve;

[0025] 2. Drill bit; 21. Connecting sleeve; 22. Drilling tube; 23. Mounting slide; 24. Limiting sleeve; 25. Cover plate; 26. Fixing screw; 27. Limiting ring; 28. Slot;

[0026] 3. Sampler; 31. Sampling ring knife; 32. Fixing protrusion; 33. Sampling sleeve; 34. Air vent; 35. Lifting slot; 36. Material stripping plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1-4 The utility model describes the above technical solution in detail through the following embodiments:

[0031] A rock and soil sampling device for geotechnical engineering investigation, comprising:

[0032] The driving device 1 comprises a first power source 13 , wherein the first power source 13 is connected to the drill bit 2 via a first drill rod 14 , and the first power source 13 is used for driving the drill bit 2 to rotate via the first drill rod 14 .

[0033] The first power source 13 can be a motor or a single-cylinder gasoline engine. In this embodiment, a motor is used.

[0034] The driving device 1 also includes a mounting frame 11, and a first power source 13 is fixedly installed in the middle of the top surface of the mounting frame 11 by bolts. The output shaft of the first power source 13 passes through the mounting frame 11 and is connected to the first drill rod 14. Handles 12 are welded on the left and right sides of the top surface of the mounting frame 11.

[0035] The handle 12 is convenient for an operator to hold.

[0036] A drill rod sleeve 15 is welded on the top of the first drill rod 14 , and the drill rod sleeve 15 is threadedly connected to the output shaft of the first power source 13 .

[0037] The first drill rod 14 can be disassembled for storage, and multiple first drill rods 14 can be connected end to end to extend the drilling depth. It should be noted that the thread direction of the drill rod sleeve 15 is opposite to the rotation direction of the first power source 13.

[0038] The drill bit 2 includes a drilling barrel 22 and a cover plate 25. The drilling barrel 22 is connected to the first drill rod 14 through a connecting sleeve 21, and is used to rotate and insert into the soil layer under the drive of the first drill rod 14. The middle part of the drilling barrel 22 is semicircular, and the cover plate 25 is clamped with the drilling barrel 22. A sampler 3 is provided in the drilling barrel 22.

[0039] The connecting sleeve 21 is welded and installed at the center of the top surface of the drilling tube 22, and the connecting sleeve 21 is threadedly connected to the tail of the first drill rod 14. The thread direction of the connecting sleeve 21 is opposite to the rotation direction of the first power source 13.

[0040] A mounting slot 23 is provided upwardly through the middle of the drilling tube 22 , and three limiting sleeves 24 are welded on one side of the top of the drilling tube 22 near the opening. The cover plate 25 is clamped with the mounting slot 23 and fixedly connected with the limiting sleeve 24 by fixing screws 26 .

[0041] The cover plate 25 and the drilling tube 22 form a cylindrical cylinder. The installation slot 23 and the fixing screw 26 can prevent the cover plate 25 from being separated from the drilling tube 22 during the drilling process.

[0042] A limiting ring 27 is welded inside the head of the drilling tube 22 , and a clamping groove 28 is provided at the top of the limiting ring 27 .

[0043] The sampler 3 includes a sampling ring cutter 31, which is mounted on the inner side of the head of the drilling tube 22. A sampling sleeve 33 is placed above the sampling ring cutter 31 and inside the drilling tube 22. The sampling sleeve 33 is used to isolate the rock and soil sample from the drilling tube 22. A fixed protrusion 32 is welded on the top of the outer side of the sampling ring cutter 31. The sampling ring cutter 31 is slidably mounted in the limit ring 27, and the fixed protrusion 32 is adapted to the card slot 28.

[0044] The matching of the fixing protrusion 32 and the card slot 28 can limit the relative sliding of the sampling ring cutter 31 and the limiting ring 27. The outer diameter of the sampling ring cutter 31 should be matched with the inner diameter of the limiting ring 27 to prevent rock and soil from entering the interior of the drilling tube 22 through the gap between the sampling ring cutter 31 and the limiting ring 27.

[0045] The sampling sleeve 33 is made of PVC, the outer diameter of the sampling sleeve 33 matches the inner diameter of the drilling tube 22, the bottom surface of the sampling sleeve 33 abuts against the top surface of the sampling ring cutter 31 and the limit ring 27, and the top surface of the sampling sleeve 33 abuts against the inner top surface of the drilling tube 22. This can prevent the sampling ring cutter 31 from sliding upward during sampling.

[0046] The sampling sleeve 33 is provided with a lifting groove 35 on the outside, so as to facilitate taking out the sampling sleeve 33 from the drilling tube 22 .

[0047] An air hole 34 is provided on the top of the side of the sampling sleeve 33 to facilitate exhausting the air inside the sampling sleeve 33 before the rock and soil sample enters the sampling sleeve 33, so as to avoid incomplete rock and soil samples due to the inability to exhaust air.

[0048] A circular through hole is provided at the top of the sampling sleeve 33 , and a stripping plate 36 is slidably installed in the sampling sleeve 33 . The middle part of the stripping plate 36 protrudes upward and is inserted into the circular through hole and is flush with the top surface of the sampling sleeve 33 .

[0049] After sampling is completed, a card can be inserted into the gap between the sampling sleeve 33 and the sampling ring knife 31 to separate the rock and soil samples inside the two, and then the sampling sleeve 33 can be taken out of the drilling tube 22. Then, the stripping plate 36 can be pushed to push the rock and soil samples out of the sampling sleeve 33, thereby ensuring the integrity of the rock and soil samples.

[0050] When using the device in this embodiment, the operator holds the handle 12 and aligns the opening of the drilling tube 22 with the ground to ensure that the first drill rod 14 is in a vertical state.

[0051] The first power source 13 is started to drive the drill bit 2 to rotate through the first drill rod 14, and a vertical downward pressure is applied to the handle 12 to press the drill bit 2 into the soil layer.

[0052] When the drill bit 2 is rotated and pressed downward, the rock and soil below the drill bit 2 is cut by the sampling ring cutter 31 and then slides into the sampling sleeve 33 .

[0053] After sampling is completed, a vertical upward force is applied to the handle 12 to lift the drill bit 2 out of the ground.

[0054] Unscrew the fixing screw 26 and remove the cover plate 25. Insert a card into the gap between the sampling sleeve 33 and the sampling ring cutter 31 to separate the rock and soil samples inside the two. Use the extraction groove 35 to remove the sampling sleeve 33 from the drilling tube 22. Then push the sampling ring cutter 31 from the bottom to remove the sampling ring cutter 31 and the rock and soil samples remaining inside from the limiting ring 27.

[0055] Replace the new sampling ring cutter 31 and sampling sleeve 33, fix the cover plate 25 and the drilling tube 22 again, and then perform the second sampling.

[0056] While the second sampling is being performed, the removed sampling ring knife 31 can be cleaned synchronously and kept for backup.

[0057] Then, the stripping plate 36 of the sampling sleeve 33 containing the rock and soil sample is pushed to completely push the rock and soil sample out of the sampling sleeve 33 .

[0058] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A geotechnical sampling device for geotechnical engineering investigation, characterized in that: include: A driving device (1), the driving device (1) comprising a first power source (13), the first power source (13) being connected to a drill bit (2) via a first drill rod (14), the first power source (13) being used to drive the drill bit (2) to rotate via the first drill rod (14); The drill bit (2) comprises a drilling tube (22) and a cover plate (25); the drilling tube (22) is connected to the first drilling rod (14) via a connecting sleeve (21) and is used to rotate and insert into the soil layer under the drive of the first drilling rod (14); the middle part of the drilling tube (22) is semicircular; the cover plate (25) is clamped with the drilling tube (22); and a sampler (3) is provided in the drilling tube (22); The sampler (3) comprises a sampling ring cutter (31), the sampling ring cutter (31) being mounted on the inner side of the head of the drilling tube (22), and a sampling sleeve (33) being placed above the sampling ring cutter (31) and inside the drilling tube (22), the sampling sleeve (33) being used to isolate the rock and soil sample from the drilling tube (22).

2. A geotechnical sampling device for geotechnical engineering investigation according to claim 1, characterized in that: The driving device (1) further comprises a mounting frame (11), the first power source (13) being fixedly mounted on the middle of the top surface of the mounting frame (11), an output shaft of the first power source (13) passing through the mounting frame (11) and connected to a first drill rod (14), and handles (12) being provided on left and right sides of the top surface of the mounting frame (11).

3. A geotechnical sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A drill rod sleeve (15) is provided at the top of the first drill rod (14), and the drill rod sleeve (15) is threadedly connected to the output shaft of the first power source (13).

4. A geotechnical sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A mounting slot (23) is provided in the middle of the drilling tube (22) and extends upward therethrough. A plurality of limiting sleeves (24) are provided on one side of the top of the drilling tube (22) near the opening. The cover plate (25) is snap-fitted to the mounting slot (23) and fixedly connected to the limiting sleeves (24) via fixing screws (26).

5. A geotechnical sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A limiting ring (27) is provided inside the head of the drilling tube (22), and a clamping groove (28) is provided at the top of the limiting ring (27).

6. A geotechnical sampling device for geotechnical engineering investigation according to claim 5, characterized in that: A fixing protrusion (32) is provided on the top of the outer side of the sampling ring knife (31), and the sampling ring knife (31) is slidably installed in the limiting ring (27), and the fixing protrusion (32) is adapted to the clamping groove (28).

7. A geotechnical sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A circular through hole is provided at the top of the sampling sleeve (33), and a stripping plate (36) is slidably installed in the sampling sleeve (33). The middle part of the stripping plate (36) protrudes upward and is inserted into the circular through hole and is flush with the top surface of the sampling sleeve (33).