Rock mass structural surface friction angle detection device

Abstract

The utility model discloses a rock mass structural plane friction angle detection device which comprises a base and an upper cover, the upper cover is located above the base, a multi-dimensional force sensor is installed between the base and the upper cover, an anti-skid pad is installed at the bottom of the base, and the upper cover and the multi-dimensional force sensor are connected through a first fixing bolt. The base and the multi-dimensional force sensor are connected through a second fixing bolt. The device is simple in structure, small in size and convenient to carry and use.

Description

Technical Field

[0001] This utility model relates to the field of rock mass detection technology, and more specifically, to a device for detecting the friction angle of rock mass structural surfaces. Background Technology

[0002] Current equipment for measuring the friction angle of rock mass surfaces uses a mechanical structure to decompose external forces into forces along the X and Z axes. Two independent sensors (a pressure sensor and a thrust sensor) then capture the normal and tangential forces applied to the measuring device, respectively. The friction angle data is obtained by converting and calculating the data collected from the two sensors. However, the use of a mechanical force decomposition structure results in bulky equipment that is difficult to carry. Furthermore, gaps and wear can easily occur in the fit of components within the mechanical force decomposition structure, leading to measurement errors. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for detecting the friction angle of rock mass structural surfaces.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a rock mass surface friction angle detection device, including a base and a top cover. The top cover is located above the base, and a multi-dimensional force sensor is installed between the base and the top cover. An anti-slip pad is installed at the bottom of the base.

[0006] Furthermore, the top cover and the multi-dimensional force sensor are connected by a fixing bolt, and the base and the multi-dimensional force sensor are connected by a fixing bolt.

[0007] Furthermore, a boss is provided on the upper part of the base, and a side plate is provided on the lower part of the upper cover, with the side plate arranged along the outer periphery of the upper cover.

[0008] Furthermore, several spring plungers are installed on the upper part of the base.

[0009] Furthermore, the base has mounting holes, and the bottom of the spring plunger is installed in the mounting holes.

[0010] Furthermore, a stepped hole three is provided on the base below the mounting hole, and a threaded hole is provided at the bottom of the spring plunger. A fixing screw is installed in the stepped hole three, and the upper end of the fixing screw is screwed into the threaded hole.

[0011] Furthermore, an installation groove is provided at the bottom of the base, and an anti-slip pad is embedded in the installation groove.

[0012] Furthermore, the anti-slip mat is made of silicone rubber.

[0013] Furthermore, an installation port is provided on the top cover, and a display screen is installed inside the installation port. The display screen is electrically connected to the multi-dimensional force sensor.

[0014] The beneficial effects of this utility model are: it uses a multi-dimensional force sensor to directly measure the force data in the X, Y, and Z directions, without relying on a traditional mechanical force decomposition mechanism, which can reduce measurement errors; the simplified structure makes the device size significantly smaller, making it easy to carry and quickly deploy on site. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a rock mass surface friction angle detection device in this embodiment;

[0016] Figure 2 This is a cross-sectional view of the rock mass structure surface friction angle detection device in this embodiment;

[0017] Figure 3 This is a schematic diagram of one installation of the multi-dimensional force sensor in this embodiment;

[0018] Figure 4 This is a schematic diagram of one installation of the spring plunger in this embodiment;

[0019] Figure 5 This is a schematic diagram illustrating one usage method of the rock mass structure surface friction angle detection device in this embodiment.

[0020] Reference numerals: 1. Base; 2. Top cover; 3. Multi-dimensional force sensor; 4. Anti-slip pad; 5. Spring plunger; 6. Side plate; 7. Mounting groove; 8. Boss; 9. Fixing bolt one; 10. Stepped hole one; 11. Fixing bolt two; 12. Stepped hole two; 13. Display screen; 14. Lower plate sample; 15. Upper plate sample; 16. Test platform; 17. Stepped hole three; 18. Threaded hole; 19. Fixing screw; 20. Mounting hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-4 As shown, a rock mass surface friction angle detection device includes a base 1 and a top cover 2. The top cover 2 is located above the base 1. A multi-dimensional force sensor 3 is installed between the base 1 and the top cover 2. The multi-dimensional force sensor 3 is a DYDW-004 model manufactured by Bengbu Dayang Sensor Engineering Co., Ltd., which can directly measure the force components in the X, Y, and Z directions, thereby simplifying the structure, reducing the size of the equipment, and making it easy to carry and quickly deploy on site.

[0023] The base 1 has a mounting groove 7 at its lower part, and the anti-slip pad 4 is embedded in the mounting groove 7. The anti-slip pad 4 is made of silicone rubber, which can increase the friction between the pad and the upper plate sample 15 to prevent slipping.

[0024] like Figure 5 As shown, the friction angle of a rock mass structural surface is the angle determined by the relationship between the frictional force on the rock structural surface and the pressure perpendicular to the structural surface. This angle describes the shear resistance of the rock structural surface under external force. In practical use, a lower plate sample 14 is placed on the test platform 16, and an upper plate sample 15 is placed on top of the lower plate sample 14. The equipment is then placed on the upper plate sample 15. The operator applies an external force to the upper cover 2 until the upper plate sample 15 and the lower plate sample 14 begin to slide relative to each other. According to the formula tanθ=T / F, where θ is the friction angle of the structural surface, T is the shear stress along the contact surface direction (i.e., the force in the X direction measured by the multi-dimensional force sensor 3), and F is the axial force perpendicular to the contact surface (i.e., the force in the Y direction measured by the multi-dimensional force sensor 3 plus the weight of the upper plate sample 15 and the weight of the testing device). When the upper plate sample 15 and the lower plate sample 14 slide relative to each other, the multi-dimensional force sensor 3 measures the maximum force. The value of the friction angle of the structural surface can be calculated based on the data of the maximum force.

[0025] like Figure 3 As shown, the upper cover 2 and the multi-dimensional force sensor 3 are connected by a fixing bolt 9, and the base 1 and the multi-dimensional force sensor 3 are connected by a fixing bolt 11. Specifically, the upper cover 2 has a stepped hole 10, through which the fixing bolt 9 is screwed into the upper surface of the multi-dimensional force sensor 3. The base 1 has a stepped hole 12, through which the fixing bolt 11 is screwed into the lower surface of the multi-dimensional force sensor 3. This ensures the secure installation of the multi-dimensional force sensor 3 and prevents displacement when subjected to force.

[0026] like Figure 2 As shown, a boss 8 is provided on the upper part of the base 1, and a side plate 6 is provided on the lower part of the upper cover 2. The side plate 6 is set along the outer periphery of the upper cover 2. The area of ​​the base 1 is smaller than the area enclosed by the side plate 6, and the side plate 6 covers part of the side of the boss 8. The lower end of the side plate 6 is 1-3mm away from the upper surface of the base 1, and the inner side of the side plate 6 is 1-3mm away from the outer periphery of the boss 8. This structure forms a bent channel between the base 1, the side plate 6, and the boss 8, which can effectively prevent dust and other impurities from entering through the gap between the side plate 6 and the base 1.

[0027] like Figure 4As shown, four spring plungers 5 are installed on the upper part of the base 1, located at the four corners of the upper part of the base 1. The base 1 has mounting holes 20, and the bottom of each spring plunger 5 is installed within one of these holes. A stepped hole 17 is located below the mounting hole 20 on the base 1. A threaded hole 18 is located at the bottom of each spring plunger 5, and a fixing screw 19 is installed within the stepped hole 17, with its upper end screwed into the threaded hole 18. When an external force is applied, the spring plungers 5 are compressed vertically; after the external force is removed, they automatically spring back, allowing the upper cover 2 to return to its original position, thus bringing the equipment to its standard starting state.

[0028] An installation port is provided on the top cover 2, and a display screen 13 is installed inside the installation port. The display screen 13 is electrically connected to the multi-dimensional force sensor 3. The force data transmitted by the multi-dimensional force sensor 3 can be displayed in real time through the display screen 13. The data can also be converted into friction angle value through the built-in calculation program, which makes it convenient for the operator to intuitively monitor the measurement process.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for detecting the friction angle of a rock mass structural surface, characterized in that, It includes a base (1) and a top cover (2), the top cover (2) being located above the base (1), a multi-dimensional force sensor (3) being installed between the base (1) and the top cover (2), and an anti-slip pad (4) being installed at the bottom of the base (1).

2. The rock mass structural surface friction angle detection device according to claim 1, characterized in that, The top cover (2) and the multi-dimensional force sensor (3) are connected by a fixing bolt (9), and the base (1) and the multi-dimensional force sensor (3) are connected by a fixing bolt (11).

3. The rock mass structural surface friction angle detection device according to claim 1, characterized in that, The base (1) is provided with a boss (8) on the upper part, and the upper cover (2) is provided with a side plate (6) on the lower part, and the side plate (6) is provided along the outer periphery of the upper cover (2).

4. The rock mass structural surface friction angle detection device according to claim 1, characterized in that, Several spring plungers (5) are installed on the upper part of the base (1).

5. The rock mass structural surface friction angle detection device according to claim 4, characterized in that, The base (1) has an installation hole (20), and the bottom of the spring plunger (5) is installed in the installation hole (20).

6. The rock mass structural surface friction angle detection device according to claim 5, characterized in that, The base (1) has a stepped hole three (17) located below the mounting hole (20). The bottom of the spring plunger (5) has a threaded hole (18). A fixing screw (19) is installed in the stepped hole three (17). The upper end of the fixing screw (19) is screwed into the threaded hole (18).

7. The rock mass structural surface friction angle detection device according to claim 1, characterized in that, The base (1) has an installation groove (7) at its lower part, and the anti-slip pad (4) is embedded in the installation groove (7).

8. The rock mass structural surface friction angle detection device according to claim 1 or 7, characterized in that, The anti-slip mat (4) is made of silicone rubber.

9. A rock mass structural surface friction angle detection device according to claim 1 or 7, characterized in that, An installation port is provided on the upper cover (2), and a display screen (13) is provided in the installation port. The display screen (13) is electrically connected to the multi-dimensional force sensor (3).

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