Pointer type vane shear apparatus

Abstract

The utility model discloses a pointer type vane shear apparatus which comprises a shell, a rolling bearing, a central shaft, a force sensor, a dial plate, a pointer, a damping ring, a spherical nut, a positioning pin, a shell bottom end cover, a special tool bit and the like. The device is characterized in that the top of a rotatable shell is connected with a dial plate, the bottom of the shell is connected with a shell end cover, an inner cavity of the shell is divided into an upper isolation layer and a lower isolation layer, rolling bearings are embedded in the two ends of the isolation layer respectively, a center shaft is installed between the two rolling bearings, and the center shaft is erected in the center of a force sensor; due to the fact that the shell, the dial plate, the center shaft, the force sensor and the special tool bit are of a coaxial connected structure, when the shell is stressed and the special tool bit is inserted into a soil body, torsion is applied to rotate the shell, and the dial plate, the center shaft and the force sensor are driven to rotate together till the soil body is cut off. The device has the effect of detecting the shearing strength value of the marine geological soil on site.

Description

Technical Field

[0001] The utility model relates to a pointer type vane shear apparatus, belonging to a detection device in the field of shallow sea geological exploration, and is used for on-site detection and evaluation of the shear strength value of soil. Background Art

[0002] The shear strength value of soil is an important index in soil mechanics experiments. For the shear strength values in the prior art, most rely on taking soil samples on-site and sending them back to the laboratory. Taking soil samples will cause the soil body to be disturbed and lose its original state, and preparing soil samples will consume time in transportation, and the queuing test period in the laboratory is relatively long.

[0003] And on-site test equipment includes triaxial testers, compression testing machines, shear and compression testing machines, etc. They are relatively large in volume, need to be carried by vehicle, and require power electricity, which is not convenient for marine field operations. Therefore, a portable, fast, on-site, and energy-saving vane shear apparatus detection device is needed for shallow sea geological exploration. Summary of the Utility Model

[0004] In order to solve the deficiencies in the prior art, the utility model provides a pointer type vane shear apparatus for shallow sea. It includes a housing of the main body, rolling bearings, a central shaft, a force sensor, a scale dial, a pointer, a damping ring, a spherical nut, a positioning pin, a housing end cover, a special cutter head, etc.; its characteristics are: a rotatable cylindrical housing, the top of the housing is connected with a scale dial, the bottom of the housing is connected with a housing end cover, the interior of the housing is further divided into upper and lower isolation layers, and rolling bearings are respectively installed in the isolation layers. The inner diameters of these two rolling bearings are provided with a central shaft, and a cylindrical force sensor is sleeved outside the circumference of the central shaft. The bottom of the central shaft and the force sensor is connected with a special cutter head. Since the housing, the scale dial, the central shaft, the force sensor, and the special cutter head are coaxially connected structures, and when the housing is stressed and the special cutter head is inserted into the soil body, the housing rotates and drives the scale dial, the central shaft, and the force sensor to rotate together until the soil body is completely sheared off. At this time, the reading on the pointer is the shear strength value.

[0005] Compared with the prior art, the beneficial effects of the utility model are: a pure mechanical mechanism, without the need for power electricity, in-situ detection, without disturbing the original state of the soil, on-site inspection of the shear strength value of the soil, without taking soil samples back to the laboratory, saving manpower and material resources, and shortening the testing period.

[0006] Furthermore, for the above-mentioned pointer type vane shear apparatus, its characteristics are: both the top end and the bottom end of the housing are provided with internal threads, and the inner cavity of the housing is divided into upper and lower isolation layers.

[0007] Further, for the described pointer type vane shear apparatus, it is characterized in that: the force sensor surrounds the outside of the central axis, the central axis stands vertically in the center of the force sensor, and both are juxtaposed between the housing and the special cutting head. The bottoms of the central axis and the force sensor are connected to the central hole of the special cutting head. Since the housing, the scale dial, the central axis, the force sensor, and the special cutting head are a coaxial integral structure, and when the housing rotates under torsion, it drives the scale dial, the central axis, the force sensor, and the special cutting head to rotate together.

[0008] Further, for the described pointer type vane shear apparatus, it is characterized in that: the force sensor is composed of a special torsion spring, and its material is any one of stainless steel, spring steel, and alloy steel.

[0009] Further, for the described pointer type vane shear apparatus, it is characterized in that: the special cutting head is composed of eight sheet-shaped blades. The small special cutting head is installed outside the central axis, and the large special cutting head is installed outside the small special cutting head.

[0010] Further, for the described pointer type vane shear apparatus, it is characterized in that: a positioning pin is provided on the outer edge of the top of the housing, and there is a damping ring below the spherical nut, above the pointer of the scale dial. Description of the Drawings

[0011] The following further elaborates on the present utility model in detail in conjunction with the drawings and specific embodiments.

[0012] Figure 1 It is the front view of a pointer type vane shear apparatus of the present utility model.

[0013] Figure 2 is Figure 1 the left view of

[0014] Description of the Reference Numerals:

[0015] 1. Housing; 2. Rolling bearing; 3. Central axis; 4. Force sensor; 5. Scale dial; 6. Pointer; 7. Damping ring; 8. Spherical nut; 9. Positioning pin; 10. Housing end cover; 11. Special cutting head. Specific Embodiments

[0016] Embodiment 1

[0017] As Figure 1As shown, the utility model discloses a pointer-type cross-plate shear force meter, comprising a mainframe housing 1, a rolling bearing 2, a central axis 3, a force sensor 4, a scale dial 5, a needle 6, a damping ring 7, a spherical nut 8, a positioning pin 9, a housing end cover 10, and a special cutter head 11; the characteristic is that: a rotatable cylindrical housing 1, the top of the housing 1 is connected to the scale dial 5, the bottom of the housing 1 is connected to the housing end cover 10, the inner cavity of the housing 1 is divided into an upper and a lower isolation layer, and the rolling bearings 2 are respectively inlaid in the two ends of the isolation layer, the center axis 3 is tightly fitted and installed in the middle of the inner diameter of the two rolling bearings, and the center axis 3 is erected in the center of the force sensor 4, and the bottom of the center axis 3 and the force sensor 4 are connected to the special cutter head 11, because the housing 1 and the scale dial 5, the center axis 3, the force sensor 4, and the special cutter head 11 are coaxial conjoined structures, and when the housing 1 is rotated by an external force, the scale dial 5, the center axis 3 and the force sensor 4 are driven to rotate together.

[0018] Furthermore, the pointer-type cross-plate shear force meter is characterized in that the top and bottom ends of the shell 1 are both provided with internal threads, the internal threads at the top are connected to the scale dial 5, and the internal threads at the bottom are connected to the shell end cover 10, thus forming an inner cavity of the shell of the cross-plate shear force meter.

[0019] The inner cavity of the shell 1 is divided into upper and lower isolation layers, and a rolling bearing 2 is inlaid at each end of the isolation layer. The central axis 3 passes through the inner diameters of the two rolling bearings, and the central axis 3 and the rolling bearing 2 are tightly fitted and installed. The top of the central axis 3 is fixedly connected to the ball nut 8, and the bottom end of the central axis 3 is connected to the inner diameter center of the special cutter head 11 and fixed with screws. The beneficial effect is that when the shell 1 of the main machine links the central axis 3 and the force sensor 4 to rotate synchronously, the central axis 3 does not move up and down, does not move, and does not shake left and right. The fit is tight and extremely stable and reliable.

[0020] Furthermore, the pointer-type cross-plate shear force instrument is characterized in that: the force sensor 4 surrounds the outside of the central axis 3, the central axis 3 stands upright in the center of the force sensor 4, and the two are located side by side between the housing 1 and the special cutter head 11. The bottom of the central axis 3 and the force sensor 4 is connected to the center hole of the special cutter head 11. Since the housing 1, the scale dial 5, the central axis 3, the force sensor 4, and the special cutter head 11 are coaxially connected structures, when the housing 1 is rotated by torsion, the scale dial 5, the central axis 3, the force sensor 4, and the special cutter head 11 are driven to rotate together.

[0021] Furthermore, the top end of the force sensor 4 is fixed to the inner wall of the shell 1, and the bottom end thereof is fixed to the inner wall of the cross plate special cutter head 11, so that when the special cutter head 11 is inserted into the soil and the shell 1 is rotated by torque, the force sensor 4, the center shaft 3, and the special cutter head 11 rotate together.

[0022] Furthermore, the described vane shear apparatus with pointer type is characterized in that: the force sensor 4 is composed of a special torsion spring, and its material is any one of stainless steel, spring steel, and alloy steel. Considering the special environment of marine geological exploration during design, the preferred material for the sensor is waterproof, rustproof, and corrosion-resistant.

[0023] Furthermore, as Figure 2 shown, the described vane shear apparatus with pointer type is characterized in that: the special cutter head 11 is composed of eight sheet-shaped blades, which are evenly distributed on the cross-section of the special cutter head 11. The small-sized special cutter head is sleeved outside the central shaft 3 and fixed with screws. The large-sized special cutter head is sleeved outside the small-sized special cutter head and fixed with screws, achieving the effect that when the special cutter head 11 is inserted into the soil under external force and the housing 1 rotates, it will drive the central shaft 3, force sensor 4, and special cutter head 11 to rotate together until the soil is completely sheared and cut off.

[0024] Furthermore, the described vane shear apparatus with pointer type is characterized in that: on the outer edge of the scale dial 5 at the top of the housing 1, a positioning pin 9 is provided to position the zero point of the pointer 6. In the static state, the pointer 6 should return to the position of the positioning pin 9. When the main machine starts to operate, it drives the pointer 6 away from the positioning pin 9. When the soil is sheared and cut off, the position where the pointer 6 stops is the shear strength value. After recording the reading, reset the pointer 6 to zero at the positioning pin 9.

[0025] In addition, above the reading pointer 6 and below the spherical nut 8, there is also a damping ring 7, which is characterized by adjusting appropriate damping, and its reliability is just enough to lock the pointer 6 to ensure that it does not slip and does not lose data. The materials of the damping ring 7 are any one of rubber, plastic, nylon, spring, and spring sheet.

[0026] The utility model adopts a pure mechanical coaxial connection principle structure, achieving the beneficial effect that when the housing of the main machine is subjected to radial pressure, the special cutter head is pressed into the soil, and then torsion is applied to make the housing rotate, driving the central shaft, force sensor, special cutter head, scale dial, pointer, damping ring, and spherical nut to rotate together until the soil is sheared and cut off. With the stop of the torsion, each component of the main machine returns to its original position, but the pointer cannot return because the pointer is locked on the scale dial by the damping of the damping ring, and the value retained and indicated by the pointer is the shear strength value of the soil.

[0027] Compared with the prior art, the beneficial effect of the utility model is that the vane shear apparatus with pointer type belongs to a pure mechanical mechanism, without the need for power supply, for in-situ detection, without taking soil samples, maintaining the original state of the soil without disturbance, and detecting the shear strength value of the soil on-site, without taking soil samples back to the laboratory for testing, saving manpower and material resources and shortening the testing cycle.

Claims

1. A pointer-type cross-plate shear force instrument, comprising a housing (1) of a host machine, a rolling bearing (2), a central shaft (3), a force sensor (4), a scale dial (5), a needle (6), a damping ring (7), a ball nut (8), a positioning pin (9), a housing end cover (10), and a special cutter head (11); characterized in that: A rotatable cylindrical shell (1), the top of the shell (1) is connected to a dial (5), the bottom of the shell (1) is connected to a shell end cover (10), and the inner cavity of the shell (1) is divided into an upper and a lower isolation layer, rolling bearings (2) are respectively inlaid at both ends of the isolation layer, and the inner diameters of the two rolling bearings are installed with a central shaft (3), and the central shaft (3) is erected in the center of a cylindrical force sensor (4), and the bottoms of the central shaft (3) and the force sensor (4) are connected to the center hole of a special cutter head (11). Since the shell (1) and the dial (5), the central shaft (3), the force sensor (4), and the special cutter head (11) are coaxially connected structures, when the shell (1) is rotated by torque, the dial (5), the central shaft (3), the force sensor (4), and the special cutter head are driven to rotate together.

2. The pointer-type cross-plate shear force instrument according to claim 1, characterized in that: The top and bottom ends of the shell (1) are both provided with internal threads, and the interior of the shell (1) is divided into upper and lower isolation layers.

3. The pointer-type cross-plate shear force instrument according to claim 1, characterized in that: The force sensor (4) surrounds the outside of the central axis (3), and the central axis (3) stands upright at the center of the force sensor (4), and the two are located side by side between the housing (1) and the special cutter head (11).

4. The pointer-type cross-plate shear force instrument according to claim 1, characterized in that: The force sensor (4) is composed of a special torsion spring, and its material is any one of stainless steel, spring steel and alloy steel.

5. The pointer-type cross-plate shear force instrument according to claim 1, characterized in that: The special cutter head (11) is composed of eight blades, the small special cutter head is installed outside the central shaft (3), and the large special cutter head is sleeved outside the small special cutter head.

6. The pointer-type cross-plate shear force instrument according to claim 1, characterized in that: A positioning pin (9) is provided on the outer edge of the top of the housing (1) and is located below the spherical nut (8). A damping ring (7) is provided above the needle (6) of the scale dial (5).

Images