Hole wall spinning shearing probe

Abstract

The utility model provides a hole wall spinning shearing probe which comprises a probe body, the probe body comprises a shearing part, a plurality of shearing pieces are arranged on the peripheral side of the shearing part, a protective sleeve is arranged on the probe body, a first pressing shaft and a second pressing shaft are elastically matched with the lower side of the shearing part, and the first pressing shaft corresponds to the second pressing shaft. A pressing plate is arranged on the first pressing shaft and corresponds to the shearing piece, and the second pressing shaft corresponds to the protective sleeve. According to the utility model, the shearing sheets are elastically mounted on the peripheral side of the shearing part, and the first pressing shaft and the second pressing shaft are mounted on the lower side of the shearing part, so that the shearing sheets can be pushed out, the diameter of the device is increased, the shearing sheets can be ensured to be inserted into an undisturbed soil body, and the protective sleeve is mounted on the probe body, so that the shearing sheets can be protected through the protective sleeve; and the shearing sheet is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of shearing probe technology, specifically a hole wall spinning shearing probe. Background Technology

[0002] The shear strength of soil and rock is a crucial parameter for studying their mechanical properties and for engineering design. Common methods for measuring soil shear strength include laboratory and field tests. However, existing shear testing instruments all require shear probes or shear drill bits. For example, patent CN216051178U discloses a borehole wall expansion rotary shear probe for borehole shear testing. This probe includes a first probe section and a second probe section connected to it below; it also includes an expansion tube extending into the second probe section through the first probe section; the second probe section has multiple shear blades radially distributed on its surface; the shear blades are arranged in an array, with blades on the same radial line forming a group; the blades in adjacent groups are staggered; and the second probe section surface between adjacent groups has radially distributed openings. While this device has good shear blade load-bearing capacity, it cannot change the diameter of the device, resulting in a smaller area of ​​the shear blades inserted into the soil. This cannot guarantee that the soil contacted by the blades is undisturbed, leading to a larger error in the shear strength value obtained from the shear test.

[0003] Therefore, this utility model provides a hole wall spinning shearing probe. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a borehole wall spinning shear probe to solve the problems mentioned in the background section. This invention can push out the shearing disc, thereby increasing the diameter of the device and ensuring that the shearing disc can be inserted into the undisturbed soil. A protective sleeve can be used to protect the shearing disc and prevent it from being damaged.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a hole wall spinning shearing probe, comprising a probe body, the probe body including a shearing part, a plurality of shearing blades mounted on the periphery of the shearing part, a protective sleeve mounted on the probe body, a first pressure shaft and a second pressure shaft elastically fitted on the lower side of the shearing part, the first pressure shaft corresponding to the second pressure shaft, a pressure plate mounted on the first pressure shaft, the pressure plate corresponding to the shearing blades, and the second pressure shaft corresponding to the protective sleeve.

[0006] Furthermore, the shearing part is elastically connected to the shearing sheet, and the pressure plate is provided with multiple limiting grooves, which correspond to the shearing sheet.

[0007] Furthermore, a first groove is provided inside the first pressure shaft, and the first groove is slidably connected to the shearing part.

[0008] Furthermore, a second sliding groove is provided inside the second pressure shaft, and the second sliding groove is slidably connected to the first pressure shaft.

[0009] Furthermore, a second sliding groove is provided inside the second pressure shaft, and the second sliding groove is slidably connected to the first pressure shaft.

[0010] Furthermore, a second spring is fixed between the first pressure shaft and the groove wall of the second slide.

[0011] Furthermore, multiple push rods are fixed between the protective sleeve and the second pressure shaft.

[0012] Furthermore, the protective sleeve corresponds to the shearing blade and the shearing part, and the protective sleeve is slidably connected to the probe body.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a hole wall spinning shearing probe, which includes a shearing part; a shearing blade; a first pressure shaft; a second pressure shaft; a protective sleeve; and a probe body.

[0014] A shearing disc is elastically installed around the shearing section, and a first and second pressure shaft are installed on the lower side of the shearing section. This allows the shearing disc to be pushed out, thereby increasing the diameter of the device and ensuring that the shearing disc can be inserted into the undisturbed soil. A protective sleeve is installed on the probe body to protect the shearing disc and prevent it from being damaged. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of the hole wall spinning shearing probe of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall assembly cross-sectional structure of the hole wall spinning shearing probe of this utility model;

[0017] Figure 3 This is a schematic diagram of the assembly structure of the shearing plate and pressure plate in a hole wall spinning shearing probe of this utility model;

[0018] In the figure: 1. Probe body; 2. Shearing part; 3. Shearing blade; 4. First pressure shaft; 5. Second pressure shaft; 6. First slide groove; 7. Second slide groove; 8. First spring; 9. Second spring; 10. Pressure plate; 11. Push rod; 12. Protective sleeve; 13. Limiting groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1 to 3This utility model provides a technical solution: a hole wall spinning shearing probe, including a probe body 1, the probe body 1 including a shearing part 2, a plurality of shearing blades 3 are installed on the periphery of the shearing part 2, a protective sleeve 12 is installed on the probe body 1, a first pressure shaft 4 and a second pressure shaft 5 are elastically fitted on the lower side of the shearing part 2, the first pressure shaft 4 and the second pressure shaft 5 correspond to each other, a pressure plate 10 is installed on the first pressure shaft 4, the pressure plate 10 corresponds to the shearing blades 3, and the second pressure shaft 5 corresponds to the protective sleeve 12.

[0021] In this embodiment, the shearing part 2 is elastically connected to the shearing piece 3. The pressure plate 10 is provided with multiple limiting grooves 13, which correspond to the shearing piece 3. The first pressure shaft 4 is provided with a first sliding groove 6, which is slidably connected to the shearing part 2. The second pressure shaft 5 is provided with a second sliding groove 7, which is slidably connected to the first pressure shaft 4. The second pressure shaft 5 is provided with a second sliding groove 7, which is slidably connected to the first pressure shaft 4. A second spring 9 is fixed between the groove walls of the first pressure shaft 4 and the second sliding groove 7. Multiple push rods 11 are fixed between the protective sleeve 12 and the second pressure shaft 5. The protective sleeve 12 corresponds to the shearing piece 3 and the shearing part 2. The protective sleeve 12 is slidably connected to the probe body 1.

[0022] Specifically, the probe body 1 is threaded to the drill rod of the drilling rig, and then the probe body 1 is inserted into the borehole until the device moves to the bottom of the borehole. At this time, the second pressure shaft 5 is pressed upward, which compresses the second spring 9, so that the second pressure shaft 5 moves upward. The second pressure shaft 5 pushes the protective sleeve 12 upward through the push rod 11, so that the protective sleeve 12 slides upward, so that the protective sleeve 12 no longer protects the shearing blade 3. Then the second pressure shaft 5 is pressed upward, so that the second pressure shaft 5 presses the first pressure shaft 4, and the first spring 8 is compressed, which pushes the pressure plate 10 upward, so that the pressure plate 10 pushes the shearing blade 3 outward, thereby increasing the diameter of the device.

[0023] When the probe body 1 is pulled upward, the first spring 8 rebounds first, so that the pressure plate 10 no longer limits the shearing piece 3, thereby resetting the shearing piece 3. Then the second spring 9 rebounds later, so that the push rod 11 pulls the protective sleeve 12 downward, thus protecting the shearing piece 3.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A borehole wall spinning shearing probe, comprising a probe body (1), characterized in that, The probe body (1) includes a shearing part (2), and a plurality of shearing blades (3) are installed around the shearing part (2). A protective sleeve (12) is installed on the probe body (1). A first pressure shaft (4) and a second pressure shaft (5) are elastically fitted on the lower side of the shearing part (2). The first pressure shaft (4) corresponds to the second pressure shaft (5). A pressure plate (10) is installed on the first pressure shaft (4). The pressure plate (10) corresponds to the shearing blades (3), and the second pressure shaft (5) corresponds to the protective sleeve (12).

2. The borehole wall spinning shearing probe according to claim 1, characterized in that: The shearing part (2) is elastically connected to the shearing plate (3), and the pressure plate (10) is provided with multiple limiting grooves (13), which correspond to the shearing plate (3).

3. The borehole wall spinning shearing probe according to claim 1, characterized in that: The first pressure shaft (4) has a first sliding groove (6) inside, and the first sliding groove (6) is slidably connected to the shearing part (2).

4. The borehole wall spinning shearing probe according to claim 3, characterized in that: A first spring (8) is fixed between the shearing part (2) and the groove wall of the first groove (6).

5. The borehole wall spinning shearing probe according to claim 1, characterized in that: The second pressure shaft (5) has a second sliding groove (7) inside, and the second sliding groove (7) is slidably connected to the first pressure shaft (4).

6. The borehole wall spinning shearing probe according to claim 5, characterized in that: A second spring (9) is fixed between the first pressure shaft (4) and the groove wall of the second slide (7).

7. The borehole wall spinning shearing probe according to claim 1, characterized in that: Multiple push rods (11) are fixed between the protective sleeve (12) and the second pressure shaft (5).

8. The borehole wall spinning shearing probe according to claim 1, characterized in that: The protective sleeve (12) corresponds to the shearing blade (3) and the shearing part (2), and the protective sleeve (12) is slidably connected to the probe body (1).

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