A geotechnical unconfined compression and triaxial test sample preparation device

Abstract

The invention discloses a geotechnical unconfined compression and triaxial test sample preparation device in the field of geotechnical exploration technology, comprising an operating platform, a fixed bracket is arranged on the top left side of the operating platform, a connecting tube is movably sleeved at the bottom of the fixing rod, a sample extrusion piston is arranged at the bottom end of the fixing rod located at the inner cavity of the connecting tube, a connecting rod is fixedly arranged at the middle part of the left side of the outer wall of the connecting tube, a limiting pulley is arranged at the left end of the connecting rod, the limiting pulley is fitted with the right end surface of the fixed bracket, teeth are arranged on the top of the left outer wall of the connecting tube, a braking gear is arranged at the right end of the gear mounting cross bar through a rotating shaft, the right side of the braking gear is meshed with the teeth, a sampling tube is arranged at the bottom of the connecting tube, the device does not require the two ends of the sample to be squeezed and fixed, the surface is cut and formed, and can realize one-time sampling, greatly improve the detection efficiency, avoid the disturbance of the sample, and ensure that the detection result is accurate and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical investigation, in particular to a geotechnical unconfined compression and triaxial test sample preparation device. Background Art

[0002] In geotechnical engineering investigation and geotechnical experiments, the sample preparation for unconfined compression and triaxial tests adopts the traditional cutting method. This method requires fixing the two ends first and then slowly cutting on the surface. Not only is the sample preparation slow, but it also causes great disturbance to the sample, seriously affecting the work efficiency and test results, and is very unfavorable to the evaluation of foundation bearing capacity and slope stability and the progress of the project. At present, the corresponding sample preparation equipment and sample preparation methods on the market cannot effectively solve the above problems, which greatly restricts the development of geotechnical engineering testing. To this end, we propose a geotechnical unconfined compression and triaxial test sample preparation device. Summary of the invention

[0003] The object of the present invention is to provide a geotechnical unconfined compression and triaxial test sample preparation device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a geotechnical unconfined compression and triaxial test sample preparation device, comprising an operating platform, a fixed bracket is arranged on the top left side of the operating platform, a fixed cross frame is arranged on the top of the fixed bracket, a fixed rod is arranged on the bottom right side of the fixed cross frame, a connecting tube is arranged on the bottom movably sleeved at the bottom of the fixed rod, a sample extrusion piston is arranged on the bottom end of the fixing rod located in the inner cavity of the connecting tube, a connecting rod is fixedly arranged on the middle part of the left side of the outer wall of the connecting tube, a limiting pulley is arranged on the left end of the connecting rod, the limiting pulley is fitted with the right end surface of the fixed bracket, teeth are arranged on the top of the left outer wall of the connecting tube, a gear mounting cross bar is arranged on the right outer wall of the fixed bracket near the top, a braking gear is arranged on the right end of the gear mounting cross bar through a rotating shaft, the right side of the braking gear is meshed with the teeth, and a sampling tube is arranged at the bottom of the connecting tube.

[0005] Furthermore, a guide rail with a triangular horizontal cross section is provided on the right end surface of the fixed bracket, and the guide rail is located below the gear mounting cross bar.

[0006] Furthermore, the curved outer edge surface wall of the limiting pulley is provided with an annular triangular groove that cooperates with the guide rail.

[0007] Furthermore, a hexagonal groove is provided at the front end of the shaft hole of the gear mounting crossbar for mounting the rotating shaft, and the front end surface of the rotating shaft is flush with the bottom of the hexagonal groove.

[0008] Furthermore, a rectangular rod is fixedly provided at the front end of the rotating shaft, the length of the rectangular rod is greater than the depth of the hexagonal groove, a rotating sleeve is sleeved on the front end of the rectangular rod, and a rectangular hole matching the rectangular rod is opened at the rear end of the rotating sleeve, and the rotating sleeve has a hexagonal prism structure matching the hexagonal groove.

[0009] Furthermore, a plum blossom-shaped rubber handle is provided at the front end of the rotating sleeve.

[0010] Furthermore, the inner diameter of the sampling tube is equal to the maximum diameter of the bottom of the sample extrusion piston.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The connecting tube is connected to the fixed bracket through the pulley on the fixed bracket. The triangular guide rail and the annular triangular groove on the outer edge of the curved surface of the limiting pulley cooperate to prevent the lifting and deviation of the connecting tube when moving up and down, so as to ensure the sampling direction and the stability of the device;

[0013] 2. During the sampling process, there is no need to fix the sample at both ends and cut the surface to the required size, which can largely avoid disturbance and damage to the sample, ensure accurate and reliable test results, and can form the sample in one time, greatly improving the sample preparation efficiency;

[0014] 3. Using hexagonal grooves, rectangular rods and rotating sleeves, before or after sampling, the connecting tube is lifted by rotating the meshing teeth of the brake gear, and then the rotating sleeve is inserted into the hexagonal groove to fix the brake gear and prevent it from rotating, ensuring that the teeth are clamped and the connecting tube maintains a fixed height, which is convenient for placing samples before sampling and removing residual samples after sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the fixed rod and the sample extrusion piston of the present invention;

[0017] Figure 3 It is a front view of the gear mounting cross bar and brake gear connection structure of the present invention;

[0018] Figure 4 It is the left side view of the brake gear structure assembly of the present invention.

[0019] In the figure: 1 operating platform, 2 fixed bracket, 3 fixed cross frame, 4 fixed rod, 41 sample extrusion piston, 5 connecting tube, 6 connecting rod, 7 limit pulley, 8 teeth, 9 gear mounting cross bar, 10 brake gear, 11 rotating shaft, 111 rectangular rod, 12 sampling tube, 13 guide rail, 14 rotating sleeve, 15 plum blossom-shaped rubber head handle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-4 The present invention provides a technical solution: a geotechnical unconfined compression and triaxial test sample preparation device, comprising an operating platform 1, a fixed bracket 2 is arranged on the top left side of the operating platform 1, a fixed cross frame 3 is arranged on the top of the fixed bracket 2, a fixed rod 4 is arranged on the bottom right side of the fixed cross frame 3, the fixed rod 4 is arranged vertically, a connecting tube 5 is arranged on the bottom of the fixed rod 4, the connecting tube 5 can slide up and down on the outer wall of the fixed rod 4, the fixed rod 4 is located at the bottom end of the inner cavity of the connecting tube 5 and a sample extrusion piston 41 is arranged, the sample extrusion piston 41 is a truncated cone structure, and a connecting rod 4 is fixedly arranged in the middle of the left side of the outer wall of the connecting tube 5. A connecting rod 6 is provided with a limiting pulley 7 at the left end of the connecting rod 6, and the limiting pulley 7 is fitted with the right end surface of the fixed bracket 2. A tooth 8 is provided on the top of the left outer wall of the connecting tube 5. A gear mounting cross bar 9 is provided near the top of the right outer wall of the fixed bracket 2. A braking gear 10 is provided on the right end of the gear mounting cross bar 9 through a rotating shaft 11. The right side of the braking gear 10 is meshed with the tooth 8. The braking gear 10 rotates to engage the tooth 8 to drive the connecting tube 5 to rise and fall. A sampling tube 12 is provided at the bottom of the connecting tube 5. The connecting tube 5 drives the sampling tube 12 to be pressed into the sample. The sampling tube 12 is located directly below the sample extrusion piston 41.

[0022] like Figure 1 As shown, a guide rail 13 with a triangular horizontal cross section is provided on the right end surface of the fixed bracket 2, and the guide rail 13 is located below the gear mounting cross bar 9, and cooperates with the limiting pulley 7 to guide and avoid deflection, so that the connecting tube 5 is lifted and deflected;

[0023] like Figure 1 As shown, the curved outer edge surface wall of the limiting pulley 7 is provided with an annular triangular groove that matches the guide rail 13, so as to match the triangular guide rail 13 more stably to ensure the sampling direction and the stability of the device;

[0024] like Figure 3 As shown, the front end of the shaft hole of the gear mounting cross bar 9 for mounting the rotating shaft 11 is provided with a hexagonal groove, and the front end surface of the rotating shaft 11 is flush with the bottom of the hexagonal groove;

[0025] like Figure 3 and Figure 4As shown, a rectangular rod 111 is fixedly provided at the front end of the rotating shaft 11, and the length of the rectangular rod 111 is greater than the depth of the hexagonal groove. A rotating sleeve 14 is sleeved at the front end of the rectangular rod 111, and a rectangular hole matching the rectangular rod 111 is provided at the rear end of the rotating sleeve 14. The rotating sleeve 14 is a hexagonal prism structure matching the hexagonal groove. Before or after sampling, the connecting tube 5 is lifted by rotating the meshing teeth 8 through the brake gear 10, and then the rotating sleeve 14 is inserted into the hexagonal groove, so that the brake gear 10 is fixed and does not rotate, ensuring that the teeth 8 are clamped, and the connecting tube 5 maintains a fixed height, which is convenient for placing samples before sampling and removing residual samples after sampling.

[0026] like Figure 4 As shown, a plum blossom-shaped rubber handle 15 is provided at the front end of the rotating sleeve 14 to facilitate manual rotation.

[0027] like Figure 1 As shown in or 2, the inner diameter of the sampling tube 12 is equal to the maximum diameter of the bottom of the sample extrusion piston 41, so as to avoid the sample extrusion piston 41 being unable to enter the inner hole of the sampling tube 12 when the bottom diameter is larger, and to avoid the sample extrusion piston 41 being easily deviated and extruding more slowly when the bottom diameter is smaller.

[0028] Embodiment: During the sampling process, the rotating sleeve 14 is first inserted into the hexagonal groove to fix the brake gear 10 and prevent it from rotating, ensuring that the teeth 8 are clamped and the connecting tube 5 remains at a fixed height. Then the sample is placed on the operating platform 1, and the rotating sleeve 14 is pulled out of the hexagonal groove to keep the rotating sleeve 14 and the rectangular rod 111 connected and rotated. The rectangular rod 111 drives the rotating shaft 11 to rotate, and the rotating shaft 11 drives the brake gear 10 to rotate. The brake gear 10 engages to drive the teeth 8 and the connecting tube 5 to move downward, and the connecting tube 5 drives the sampling tube 12 to press into the sample. After the sample passes through, the rotating sleeve 14 is rotated in the opposite direction, and the brake gear 10 engages to drive the teeth 8 and the connecting tube 5 to move upward, driving the sampling tube 12 to rise, and the sample extrusion piston 41 on the fixed rod 4 pushes the sample out, and the sample is formed. The rotating sleeve 14 is inserted into the hexagonal groove again to fix the brake gear 10 and prevent it from rotating, ensuring that the teeth 8 are clamped and the connecting tube 5 remains at a fixed height, and the residual sample is taken away.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A geotechnical unconfined compression and triaxial test sample preparation device, comprising an operating platform (1), characterized in that: A fixed bracket (2) is arranged on the left side of the top of the operating platform (1), a fixed cross frame (3) is arranged on the top of the fixed bracket (2), a fixed rod (4) is arranged on the right side of the bottom of the fixed cross frame (3), a connecting tube (5) is movably sleeved at the bottom of the fixed rod (4), a sample extrusion piston (41) is arranged at the bottom end of the fixed rod (4) located in the inner cavity of the connecting tube (5), a connecting rod (6) is fixedly arranged at the middle part of the left side of the outer wall of the connecting tube (5), a limiting pulley (7) is arranged at the left end of the connecting rod (6), and the limiting pulley (7) is fitted with the right end surface of the fixed bracket (2), a tooth (8) is arranged on the top of the left side outer wall of the connecting tube (5), a gear mounting cross bar (9) is arranged near the top of the right side outer wall of the fixed bracket (2), and the gear A brake gear (10) is arranged at the right end of the mounting crossbar (9) via a rotating shaft (11), and the right side of the brake gear (10) meshes with the teeth (8). A sampling tube (12) is arranged at the bottom of the connecting tube (5). A guide rail (13) having a triangular horizontal cross section is arranged at the right end surface of the fixed bracket (2), and the guide rail (13) is located below the gear mounting crossbar (9). A rectangular rod (111) is fixedly arranged at the front end of the rotating shaft (11), and the length of the rectangular rod (111) is greater than the depth of the hexagonal groove. A rotating sleeve (14) is sleeved at the front end of the rectangular rod (111), and a rectangular hole matching the rectangular rod (111) is opened at the rear end of the rotating sleeve (14). The rotating sleeve (14) is in the form of a hexagonal prism structure matching the hexagonal groove.

2. A geotechnical unconfined compression and triaxial test sample preparation device according to claim 1, characterized in that: The curved outer edge surface wall of the limiting pulley (7) is provided with an annular triangular groove that matches the guide rail (13).

3. A geotechnical unconfined compression and triaxial test sample preparation device according to claim 1, characterized in that: A hexagonal groove is provided at the front end of the shaft hole for mounting the rotating shaft (11) of the gear mounting crossbar (9), and the front end surface of the rotating shaft (11) is flush with the bottom of the hexagonal groove.

4. A geotechnical unconfined compression and triaxial test sample preparation device according to claim 1, characterized in that: A plum blossom-shaped rubber handle (15) is provided at the front end of the rotating sleeve (14).

5. The geotechnical unconfined compression and triaxial test sample preparation device according to claim 1, characterized in that: The inner diameter of the sampling tube (12) is equal to the maximum diameter of the bottom of the sample extrusion piston (41).

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