Strain control type triaxial apparatus

Abstract

The utility model relates to the technical field of strain control type triaxial apparatuses, in particular to a strain control type triaxial apparatus which comprises a base, two supporting columns, a cross beam, a lifting table, a pressure chamber, an axial dynamometer, a mounting mechanism and an axial displacement meter, the two supporting columns are fixedly arranged on the base, and the cross beam is fixedly arranged between the two supporting columns. The lifting platform is installed on the base, the pressure chamber is fixedly arranged on the lifting platform, the axial dynamometer is arranged between the cross beam and the pressure chamber, the number of the installation mechanisms is two, and the two installation mechanisms are fixedly arranged between the axial dynamometer and the cross beam and between the axial dynamometer and the pressure chamber respectively and used for installing and fixing the axial dynamometer. And the axial displacement meter is fixedly arranged on the mounting mechanism close to one side of the cross beam, so that the problem of low position adjusting efficiency of the axial dynamometer in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of strain-controlled triaxial apparatus, and particularly relates to a strain-controlled triaxial apparatus. Background Art

[0002] The triaxial compression test is a method for measuring the shear strength of soil samples. Usually, 3-4 cylindrical samples are used, and axial pressure is applied under different constant confining pressures respectively to cause direct shear failure. Then, according to the Mohr-Coulomb theory, the shear strength is obtained.

[0003] The triaxial testing machine used in the triaxial compression test generally includes a back pressure control system, a confining pressure control system, a pressure chamber, a pore water pressure two-side system, a testing machine, etc. In the prior art, the testing machine includes a base, on which a lifting platform is arranged. Support rods are arranged on both sides of the lifting platform. A cross beam is arranged between the upper ends of the two support rods. An axial force gauge and an axial displacement gauge are arranged at the bottom end of the cross beam. A pressure chamber is arranged on the lifting platform. A piston rod is telescopically arranged at the top end of the pressure chamber. After the lifting platform rises, the piston rod can be in contact with the axial force gauge. The cylindrical sample is arranged between the piston rod and the lifting platform. By continuously rising the lifting platform, shear destructive forces are generated on both the piston rod and the lifting platform simultaneously.

[0004] During the use of the above triaxial testing machine, the pressure chamber and the axial force gauge are prone to inaccurate alignment, resulting in changes in the force on the sample during the detection process, and further leading to inaccurate test results.

[0005] In order to facilitate the alignment between the pressure chamber and the axial force gauge, after retrieval, the utility model patent with the publication number of CN213422777U in the prior art discloses a strain-controlled triaxial apparatus, which relates to the technical field of soil sample detection. It includes a base, a cross beam, a pressure chamber, an axial force gauge, and an axial displacement gauge. The pressure chamber is installed on the lifting platform through a first positioning mechanism. The upper end of the axial force gauge is installed at the bottom of the cross beam through a second positioning mechanism. The lower end of the axial force gauge is connected to the top of the pressure chamber through a third positioning mechanism. The third positioning mechanism includes a first lower positioning plate and a second lower positioning plate, which are connected together by a plurality of first bolts. A third lower positioning plate is further connected to the second lower positioning plate. A first positioning rod is installed at the top of the pressure chamber. A positioning groove and a first positioning hole are provided on the third lower positioning plate. A locking component for locking the first positioning rod is also installed on the third lower positioning plate.

[0006] During the use of the above prior art, it is necessary to loosen a plurality of first bolts in sequence to adjust the position of the axial force gauge, and then tighten the first bolts, so as to fix the axial force gauge through the work of the first bolts. The operation is time-consuming and laborious. Summary of the Utility Model

[0007] The utility model provides a strain-controlled triaxial apparatus, which solves the problem of low efficiency in adjusting the position of the axial force sensor in the related art.

[0008] The technical solution of the utility model is as follows: a strain-controlled triaxial apparatus, comprising a base, support columns, a cross beam, a lifting table, a pressure chamber, an axial force sensor, a mounting mechanism and an axial displacement sensor;

[0009] Two of the support columns are fixedly arranged on the base;

[0010] The cross beam is fixedly arranged between the two support columns;

[0011] The lifting table is mounted on the base;

[0012] The pressure chamber is fixedly arranged on the lifting table;

[0013] The axial force sensor is arranged between the cross beam and the pressure chamber;

[0014] Two of the mounting mechanisms are provided, and the two mounting mechanisms are respectively fixedly arranged between the axial force sensor and the cross beam and the pressure chamber for mounting and fixing the axial force sensor;

[0015] The axial displacement sensor is fixedly arranged on the mounting mechanism close to the cross beam side.

[0016] Preferably, the mounting mechanism comprises:

[0017] Mounting seats, which are respectively arranged on both sides of the axial force sensor;

[0018] Mounting columns, which are respectively fixedly arranged between the mounting seats and the cross beam and the pressure chamber;

[0019] Mounting blocks, which are respectively arranged on both sides inside the axial force sensor;

[0020] Mounting openings, which are opened on both sides of the mounting blocks;

[0021] Mounting rods, two of the mounting rods are fixedly arranged on the mounting blocks, and the mounting rods penetrate through the mounting openings;

[0022] A positioning mechanism, which is arranged on the side wall of the mounting opening for positioning between the mounting rod and the mounting opening;

[0023] Wherein, the axial displacement sensor is fixedly arranged on the mounting block close to the cross beam side.

[0024] Furthermore, the positioning mechanism comprises:

[0025] Positioning grooves, and a plurality of the positioning grooves are formed in the side wall of the mounting opening;

[0026] Positioning blocks, and each of the positioning blocks is slidably disposed in the positioning groove;

[0027] A threaded rod, the threaded rod is rotatably disposed at the bottom of the positioning groove, and the threaded rod extends into the positioning block through a threaded fit;

[0028] A driving mechanism, the driving mechanism is disposed in the mounting seat and is used to control the rotation of the threaded rod.

[0029] Furthermore, the driving mechanism includes:

[0030] A first cavity, the first cavity is formed on one side of the positioning groove;

[0031] A first bevel gear, the first bevel gear is rotatably disposed on the side wall of the first cavity, and the first bevel gear is fixedly connected to the threaded rod;

[0032] A second bevel gear, the second bevel gear is rotatably disposed on the side wall of the first cavity, and the second bevel gear meshes with the first bevel gear;

[0033] A synchronous rotation mechanism, the synchronous rotation mechanism is disposed in the mounting seat and is used to control the synchronous rotation of the second bevel gear.

[0034] Even further, the synchronous rotation mechanism includes:

[0035] A second cavity, the second cavity is annular, and the second cavity is formed in the mounting seat;

[0036] First gears, a plurality of the first gears are rotatably disposed in the second cavity, the first gears correspond to the second bevel gears one by one, and a connecting rod is fixedly disposed between the first gear and the second bevel gear;

[0037] A driving ring, the driving ring is rotatably disposed in the second cavity, a first annular rack is disposed on the inner wall of the driving ring, and the first annular rack meshes with the adjacent first gear;

[0038] A power input mechanism, the power input mechanism is disposed on the mounting seat and is used to control the rotation of the two driving rings.

[0039] Based on the above solution, it is characterized in that the power input mechanism includes:

[0040] A support ring, which is rotatably arranged on the mounting seat and penetrates through the side wall of the second cavity and extends into the second cavity;

[0041] A second gear, which is fixedly arranged on the outer wall of the support ring;

[0042] A second annular rack, which is fixedly arranged on the outer wall of the driving ring and meshes with the second gear;

[0043] A handwheel, which is fixedly arranged on the outer wall of the support ring.

[0044] The working principle and beneficial effects of the present utility model are as follows:

[0045] 1. In the present utility model, through the arrangement of the installation mechanism, after the installation rod is inserted into the installation opening, the installation rod can be positioned by the positioning mechanism, so as to facilitate the position adjustment and clamping fixation of the axial force gauge through the cooperation between the installation block and the mounting seat;

[0046] 2. In the present utility model, through the arrangement of the positioning mechanism, it is convenient to control the rotation of the threaded rod by the driving mechanism, and then drive the positioning block to move through the threaded fit between the threaded rod and the positioning block to clamp and fix the installation rod and unlock it, so as to facilitate the position adjustment of the axial force gauge through the installation block and the mounting seat;

[0047] 3. In the present utility model, through the arrangement of the synchronous rotation mechanism, it is convenient to control the synchronous rotation of the two driving rings by the power input mechanism, and then drive the connecting rod and the second bevel gear to rotate through the meshing of the first annular rack and the first gear, and at the same time drive the threaded rod to rotate through the meshing of the second bevel gear and the first bevel gear;

[0048] 4. In the present utility model, through the arrangement of the power input mechanism, the rotation of the support ring can drive the second gear to rotate, so as to facilitate the synchronous rotation of the driving ring through the meshing of the second gear and the second annular rack;

[0049] 5. In the present utility model, through the arrangement of the base, support column, cross beam, lifting platform, pressure chamber, axial force gauge, installation mechanism and axial displacement gauge, it is convenient to position and unlock the installation rod by rotating the handwheel, so as to facilitate the position adjustment of the axial force gauge through the cooperation between the installation block and the mounting seat, and solve the problem of low efficiency in position adjustment of the axial force gauge in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0051] Figure 1 Structural schematic diagram of the present utility model

[0052] Figure 2 Structural schematic diagram of the axial force gauge of the present utility model

[0053] Figure 3 Cross-sectional structural schematic diagram of the installation mechanism of the present utility model

[0054] Figure 4 Structural schematic diagram of the positioning mechanism of the present utility model

[0055] Figure 5 Of the present utility model Figure 4 Partial enlarged structural schematic diagram at position A in the present utility model

[0056] In the figure: 1, base; 2, support column; 3, cross beam; 4, lifting platform; 5, pressure chamber; 6, axial force gauge; 7, axial displacement gauge; 8, mounting seat; 9, mounting column; 10, mounting block; 11, mounting rod; 12, positioning block; 13, threaded rod; 14, first cavity; 15, first bevel gear; 16, second bevel gear; 17, second cavity; 18, first gear; 19, driving ring; 20, support ring; 21, second gear; 22, hand wheel Specific implementation manner

[0057] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model

[0058] As Figures 1 to 5 shown, this embodiment proposes a strain-controlled triaxial apparatus, including a base 1, support columns 2, a cross beam 3, a lifting platform 4, a pressure chamber 5, an axial force gauge 6, an installation mechanism, and an axial displacement gauge 7. Two support columns 2 are fixedly arranged on the base 1, the cross beam 3 is fixedly arranged between the two support columns 2, the lifting platform 4 is installed on the base 1, the pressure chamber 5 is fixedly arranged on the lifting platform 4, the axial force gauge 6 is arranged between the cross beam 3 and the pressure chamber 5, the installation mechanism is arranged in two, and the two installation mechanisms are respectively fixedly arranged between the axial force gauge 6 and the cross beam 3 and the pressure chamber 5 respectively for installing and fixing the axial force gauge 6, and the axial displacement gauge 7 is fixedly arranged on the installation mechanism on the side close to the cross beam 3

[0059] Among them, the installation mechanism includes an installation base 8, an installation column 9, an installation block 10, an installation opening, an installation rod 11 and a positioning mechanism. Installation bases 8 are respectively arranged on both sides of the axial force gauge 6. Installation columns 9 are fixedly arranged between the installation bases 8 and the cross beam 3 and the pressure chamber 5 respectively. Installation blocks 10 are respectively arranged on both sides inside the axial force gauge 6. Installation openings are opened on both sides of the installation blocks 10. Two installation rods 11 are fixedly arranged on the installation blocks 10. The installation rods 11 penetrate through the installation openings. The positioning mechanism is arranged on the side wall of the installation opening and is used for positioning between the installation rod 11 and the installation opening. Among them, the axial displacement gauge 7 is fixedly arranged on the installation block 10 on the side close to the cross beam 3.

[0060] Specifically, after the installation rod 11 is inserted into the installation opening, the installation rod 11 can be positioned through the positioning mechanism, so that the position adjustment and clamping fixation of the axial force gauge 6 can be realized through the cooperation between the installation block 10 and the installation base 8.

[0061] Among them, the positioning mechanism includes positioning grooves, positioning blocks 12, threaded rods 13 and a driving mechanism. A plurality of positioning grooves are opened on the side wall of the installation opening. A positioning block 12 is slidably arranged in each positioning groove. The threaded rod 13 is rotatably arranged at the bottom of the positioning groove. The threaded rod 13 extends into the positioning block 12 through threaded cooperation. The driving mechanism is arranged in the installation base 8 and is used for controlling the rotation of the threaded rod 13.

[0062] Specifically, the rotation of the threaded rod 13 can be controlled through the driving mechanism, and then the positioning block 12 can be driven to move through the threaded cooperation between the threaded rod 13 and the positioning block 12, and the installation rod 11 can be clamped and fixed and unlocked, so that the position of the axial force gauge 6 can be adjusted through the cooperation of the installation block 10 and the installation base 8.

[0063] Among them, the driving mechanism includes a first cavity 14, a first bevel gear 15, a second bevel gear 16 and a synchronous rotation mechanism. The first cavity 14 is opened on one side of the positioning groove. The first bevel gear 15 is rotatably arranged on the side wall of the first cavity 14. The first bevel gear 15 is fixedly connected to the threaded rod 13. The second bevel gear 16 is rotatably arranged on the side wall of the first cavity 14. The second bevel gear 16 meshes with the first bevel gear 15. The synchronous rotation mechanism is arranged in the mounting seat 8 and is used to control the synchronous rotation of the second bevel gear 16. The synchronous rotation mechanism includes a second cavity 17, a first gear 18, a driving ring 19 and a power input mechanism. The second cavity 17 is arranged in a ring shape and is opened in the mounting seat 8. A plurality of first gears 18 are rotatably arranged in the second cavity 17. The first gears 18 correspond to the second bevel gears 16 one by one. A connecting rod is fixedly arranged between the first gear 18 and the second bevel gear 16. A driving ring 19 is rotatably arranged in the second cavity 17. The inner wall of the driving ring 19 is provided with a first annular rack, and the first annular rack meshes with the adjacent first gear 18. The power input mechanism is arranged on the mounting seat 8 and is used to control the rotation of the two driving rings 19. The power input mechanism is characterized in that it includes a support ring 20, a second gear 21, a second annular rack and a handwheel 22. The support ring 20 is rotatably arranged on the mounting seat 8. The support ring 20 penetrates the side wall of the second cavity 17 and extends into the second cavity 17. The second gear 21 is fixedly arranged on the outer wall of the support ring 20. The second annular rack is fixedly arranged on the outer wall of the driving ring 19. The second annular rack meshes with the second gear 21. The handwheel 22 is fixedly arranged on the outer wall of the support ring 20.

[0064] Specifically, the operator rotates the handwheel 22, which can drive the support ring 20 and the second gear 21 to rotate. Then, through the meshing of the second gear 21 and the second annular rack, the driving ring 19 is driven to rotate. Further, through the meshing of the first annular rack and the first gear 18, the first gear 18, the connecting rod and the second bevel gear 16 can be driven to rotate. At the same time, the threaded rod 13 is driven to rotate through the meshing of the second bevel gear 16 and the first bevel gear 15.

[0065] In this embodiment, during use, the operator rotates the handwheel 22, which can drive the support ring 20 and the second gear 21 to rotate. Then, through the meshing of the second gear 21 and the second annular rack, the driving ring 19 is driven to rotate. Further, through the meshing of the first annular rack and the first gear 18, the first gear 18, the connecting rod and the second bevel gear 16 can be driven to rotate. At the same time, the threaded rod 13 is driven to rotate through the meshing of the second bevel gear 16 and the first bevel gear 15. Through the thread fit between the threaded rod 13 and the positioning block 12, the positioning block 12 can be driven to move to clamp and fix and unlock the mounting rod 11. Thus, the position of the axial force gauge 6 is adjusted through the cooperation of the mounting block 10 and the mounting seat 8.

[0066] In this embodiment, the operator places the axial force gauge 6 between the mounting block 10 and the mounting seat 8. After inserting the mounting rod 11 into the mounting opening, the operator rotates the handwheel 22, which can drive the support ring 20 and the second gear 21 to rotate. Thus, the drive ring 19 is driven to rotate through the meshing of the second gear 21 and the second annular rack. Furthermore, the first gear 18, the connecting rod, and the second bevel gear 16 are driven to rotate through the meshing of the first annular rack and the first gear 18. At the same time, the threaded rod 13 is driven to rotate through the meshing of the second bevel gear 16 and the first bevel gear 15. The positioning block 12 is driven to move through the threaded fit between the threaded rod 13 and the positioning block 12, and the mounting rod 11 is clamped and fixed and unlocked. Thus, the position of the axial force gauge 6 is adjusted through the cooperation of the mounting block 10 and the mounting seat 8.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A strain-controlled triaxial apparatus, characterized in that: include: Base (1); Support columns (2), two of the support columns (2) being fixedly arranged on the base (1); A crossbeam (3), the crossbeam (3) being fixedly arranged between the two support columns (2); A lifting platform (4), the lifting platform (4) being mounted on the base (1); A pressure chamber (5), the pressure chamber (5) being fixedly arranged on the lifting platform (4); an axial dynamometer (6), the axial dynamometer (6) being arranged between the crossbeam (3) and the pressure chamber (5); A mounting mechanism, wherein two mounting mechanisms are provided, and the two mounting mechanisms are respectively fixedly arranged between the axial dynamometer (6) and the crossbeam (3) and the pressure chamber (5), and are used to mount and fix the axial dynamometer (6); An axial displacement meter (7), the axial displacement meter (7) being fixedly arranged on the mounting mechanism at a side close to the crossbeam (3).

2. A strain-controlled triaxial apparatus according to claim 1, characterized in that: The mounting mechanism comprises: A mounting seat (8), wherein the mounting seats (8) are respectively arranged on both sides of the axial dynamometer (6); A mounting column (9), wherein the mounting seat (8) is fixedly provided between the crossbeam (3) and the pressure chamber (5); A mounting block (10), wherein the mounting blocks (10) are respectively arranged on both sides of the axial dynamometer (6); A mounting opening, the mounting opening being opened on two sides of the mounting block (10); Mounting rods (11), two of the mounting rods (11) being fixedly arranged on the mounting block (10), and the mounting rods (11) passing through the mounting opening; A positioning mechanism, the positioning mechanism being arranged on a side wall of the installation opening and being used to position the installation rod (11) and the installation opening; Wherein, the axial displacement meter (7) is fixedly arranged on the mounting block (10) on a side close to the crossbeam (3).

3. A strain-controlled triaxial apparatus according to claim 2, characterized in that: The positioning mechanism comprises: Positioning grooves, a plurality of said positioning grooves are provided on the side wall of the installation opening; A positioning block (12), wherein each positioning groove is slidably provided with the positioning block (12); a threaded rod (13), the threaded rod (13) being rotatably disposed at the bottom of the positioning groove, the threaded rod (13) extending into the positioning block (12) through threaded engagement; A driving mechanism, the driving mechanism is arranged in the mounting seat (8) and is used to control the threaded rod (13) to rotate.

4. A strain-controlled triaxial apparatus according to claim 3, characterized in that: The driving mechanism comprises: A first cavity (14), the first cavity (14) being opened on one side of the positioning groove; a first bevel gear (15), the first bevel gear (15) being rotatably disposed on a side wall of the first cavity (14), the first bevel gear (15) being fixedly connected to the threaded rod (13); a second bevel gear (16), the second bevel gear (16) being rotatably disposed on a side wall of the first cavity (14), the second bevel gear (16) being meshed with the first bevel gear (15); A synchronous rotation mechanism, the synchronous rotation mechanism is arranged in the mounting seat (8) and is used to control the second bevel gear (16) to rotate synchronously.

5. A strain-controlled triaxial apparatus according to claim 4, characterized in that: The synchronous rotation mechanism comprises: A second cavity (17), the second cavity (17) being arranged in a ring shape, and the second cavity (17) being opened in the mounting seat (8); a first gear (18), wherein a plurality of the first gears (18) are rotatably arranged in the second cavity (17), the first gears (18) correspond to the second bevel gears (16) in a one-to-one manner, and a connecting rod is fixedly arranged between the first gears (18) and the second bevel gears (16); A drive ring (19), the drive ring (19) being rotatably disposed in the second cavity (17), the inner wall of the drive ring (19) being provided with a first annular rack, the first annular rack being meshed with the adjacent first gear (18); A power input mechanism is arranged on the mounting seat (8) and is used to control the two drive rings (19) to rotate.

6. A strain-controlled triaxial apparatus according to claim 5, characterized in that The power input mechanism comprises: a support ring (20), the support ring (20) being rotatably disposed on the mounting seat (8), the support ring (20) penetrating a side wall of the second cavity (17) and extending into the second cavity (17); a second gear (21), the second gear (21) being fixedly arranged on the outer wall of the support ring (20); a second annular rack, the second annular rack being fixedly arranged on the outer wall of the drive ring (19), the second annular rack being meshed with the second gear (21); A hand wheel (22), wherein the hand wheel (22) is fixedly arranged on an outer wall of the support ring (20).

Images