Fixture for tensile test of geotechnical material

Abstract

The utility model relates to the field of building material testing devices, and discloses a clamp for a tensile test of a geotechnical material, which comprises a fixed seat, hydraulic devices are fixedly connected to two sides of the top of the fixed seat, a fixed plate is fixedly connected to the driving ends of the hydraulic devices, and an upper base is rotatably connected to the top of the fixed plate. A guide rail is slidably connected to the top of the fixing seat, a lower base is mounted at the top of the guide rail, supporting columns are fixedly connected to the lower base and the upper base, a rotating handle is rotatably connected to one side of each supporting column, a bolt is fixedly connected to one side of each rotating handle, and a clamping head is fixedly connected to one side of each bolt. According to the tensile test fixture, the bolt is moved downwards by rotating the rotating handle on the supporting column, the clamping head on one side of the bolt is driven to push the two clamping blocks to slide along the inner wall of the shell, the baffles are arranged on the two sides of the clamping blocks, the clamping blocks can be prevented from sliding out in the moving process, and therefore the clamping blocks can effectively fix a workpiece for a tensile test.

Description

TECHNICAL FIELD

[0001] The utility model relates to building material testing device field especially relates to a clamp for geotechnical material tensile test. BACKGROUND

[0002] Tensile test fixture is widely used in material science, mechanical engineering, quality control and other fields, for evaluating the performance of various materials under tensile force, and then helping to determine its application scope and performance index, by fixing the sample and applying gradually increasing tension, by measuring the change of force and displacement, to evaluate the tensile properties of materials.

[0003] The tensile test fixture first fixes the material sample to be tested between the two clamping parts, and applies force to the clamp through the driving assembly, and starts the tensile test of the material sample, and during the test, the tension gradually increases until the material breaks or reaches the set test condition.

[0004] The conventional tensile test fixture has the problem of not being fixed firmly, and for samples with irregular shape or different hardness, it is easy to cause the clamp to slip or the sample to fall off, affecting the test accuracy and the reliability of the results, therefore, a clamp for geotechnical material tensile test is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the above shortcomings, the utility model provides a clamp for geotechnical material tensile test, aiming at improving the problem of not being fixed firmly in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A clamp for geotechnical material tensile test, comprising a fixed seat, the top of the fixed seat is fixedly connected with a hydraulic device on both sides, the driving end of the two hydraulic devices is fixedly connected with a fixed plate, the top of the fixed plate is rotatably connected with an upper base, the top of the fixed seat is slidably connected with a guide rail, the top of the guide rail is provided with a lower base, the proximal side of the lower base and the proximal side of the upper base are fixedly connected with a support column, one side of the support column is fixedly connected with a limiting plate, one side of the limiting plate is fixedly connected with an outer shell, one side of the support column is rotatably connected with a handle, one side of the handle is fixedly connected with a bolt, one side of the bolt is fixedly connected with a clamp head, the inner wall of the outer shell is slidably connected with two clamping blocks, the top of the fixed seat is provided with an adjusting assembly, and the top of the fixed plate is provided with a driving assembly.

[0008] Further description of the above technical scheme:

[0009] The adjusting assembly comprises two telescopic rods, one side of the telescopic rods is fixedly connected to the outside of the guide rail, the proximal sides of the two telescopic rods are fixedly connected with adjusting plates, and the proximal sides of the two adjusting plates are fixedly connected with small springs;

[0010] As a further description of the above technical solution:

[0011] The driving assembly comprises a motor protection shell, a motor is fixedly connected to the inner wall of the motor protection shell, and the driving end of the motor is fixedly connected to one side of the upper base;

[0012] As a further description of the above technical solution:

[0013] The inner walls of the fixing plate are slidably connected with slide rods, the top of the slide rod is slidably connected with a damping plate, the outer portion of the slide rod is sleeved with a spring, and the bottom of the fixing plate is fixedly connected to the top of the fixing seat;

[0014] As a further description of the above technical solution:

[0015] The outer wall of the bolt is threadedly connected to the inner wall of the shell, the inner wall of the shell is threadedly connected with two screws, and the outer walls of the two screws are slidably connected with a baffle;

[0016] As a further description of the above technical solution:

[0017] The top of the fixing seat is provided with a sliding groove, and the outer portion of the guide rail is slidably connected to the inner wall of the sliding groove;

[0018] As a further description of the above technical solution:

[0019] The inner walls of the two clamping blocks are in contact with the outer wall of the chuck, and the outer portion of the telescopic rod is clamped with the inner wall of the sliding groove;

[0020] As a further description of the above technical solution:

[0021] One end of the spring is fixedly connected to one side of the slide rod, and the other end of the spring is fixedly connected to one side of the damping plate.

[0022] The utility model has the advantages of the following:

[0023] 1、The utility model discloses, through rotating the handle on the support column, the bolt can be moved down, and the chuck on one side of the bolt pushes two clamping blocks to slide along the inner wall of the shell, the both sides of the clamping block are provided with the baffle, can limit the clamping block in the process of moving and not slide out, so that the clamping block can effectively fix the material used for tensile test.

[0024] 2. In this utility model, by pinching the adjusting plate at the top of the guide rail inward and retracting the telescopic rod inward, the guide rail can slide in the groove, and the position of the guide rail in the groove can be adjusted, effectively testing the tensile test material through different directions and angles, thereby improving the accuracy of the test product. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a clamp for tensile testing of geotechnical materials proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the fixing seat of a clamp for tensile testing of geotechnical materials proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the clamping block of a clamp for tensile testing of geosynthetic materials proposed in this utility model;

[0028] Figure 4 A schematic diagram of the guide rail structure of a clamp for tensile testing of geotechnical materials proposed for utility model purposes;

[0029] Figure 5 A schematic diagram of the adjustment plate of a clamp for tensile testing of geotechnical materials proposed for utility model.

[0030] Legend:

[0031] 1. Fixed base; 2. Hydraulic unit; 3. Fixed plate; 4. Motor protective shell; 5. Motor; 6. Support column; 7. Upper base; 8. Rotary handle; 9. Bolt; 10. Clamp; 11. Clamping block; 12. Baffle; 13. Screw; 14. Outer shell; 15. Limiting plate; 16. Slide rod; 17. Shock absorber plate; 18. Spring; 19. Guide rail; 20. Lower base; 21. Adjustment plate; 22. Small spring; 23. Telescopic rod; 24. Slide groove. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a geosynthetic material tensile testing fixture, comprising a fixed base 1, with hydraulic actuators 2 fixedly connected to both sides of the top of the fixed base 1. The hydraulic actuators 2 can adjust the power so that the fixture can apply appropriate force during tensile testing. A fixed plate 3 is fixedly connected to the drive ends of the two hydraulic actuators 2, which improves the stability of the device. An upper base 7 is rotatably connected to the top of the fixed plate 3. A guide rail 19 is slidably connected to the top of the fixed base 1, allowing the guide rail 19 to slide along a certain trajectory, thereby achieving precise adjustment and positioning during fixture operation. A lower base 20 is mounted on the top of the guide rail 19, and the lower base 20 is fixedly connected to the side of the upper base 7 adjacent to it. There is a support column 6, which can ensure stability during clamping and stretching. A limiting plate 15 is fixedly connected to one side of the support column 6, and a housing 14 is fixedly connected to one side of the limiting plate 15. The limiting plate 15 can rotate with the support column 6 to drive the housing 14 to rotate. A rotating handle 8 is rotatably connected to one side of the support column 6. The rotating handle 8 can be rotated and adjusted according to different tensile test materials. A bolt 9 is fixedly connected to one side of the rotating handle 8, and a clamp 10 is fixedly connected to one side of the bolt 9. Two clamping blocks 11 are slidably connected to the inner wall of the housing 14. The tensile material is clamped and fixed by pushing the clamping blocks 11 forward. An adjustment component is provided on the top of the fixing base 1, and a drive component is provided on the top of the fixing plate 3.

[0034] Reference Figure 1 , Figure 3 and Figure 5 The adjustment assembly includes two telescopic rods 23. One side of each telescopic rod 23 is fixedly connected to the outside of the guide rail 19. The position change can be precisely controlled by the extension and retraction of the telescopic rods 23, ensuring the flexibility and adjustability of the assembly. An adjustment plate 21 is fixedly connected to the adjacent side of the two telescopic rods 23. The adjustment plate 21 is used to ensure that the telescopic rods 23 maintain a consistent displacement during the adjustment process, ensuring the synchronous action of the two telescopic rods 23, thereby achieving a smooth adjustment process. A small spring 22 is fixedly connected to the adjacent side of the two adjustment plates 21. The function of the small spring 22 is to provide elastic support, ensure stability during adjustment, and prevent excessive movement. The drive assembly includes a motor protective shell 4. The motor protective shell 4 can effectively prevent external damage and improve the service life of the motor 5. The motor 5 is fixedly connected to the inner wall of the motor protective shell 4. The drive end of the motor 5 is fixedly connected to one side of the upper base 7.

[0035] Reference Figure 2 , Figure 3 and Figure 5The inner walls of the fixed plate 3 are slidably connected to slide rods 16 on both sides, which can stabilize the component during adjustment and ensure the flexibility of the component. The top of the slide rods 16 is slidably connected to a shock-absorbing plate 17, which can reduce the impact force generated during the rise and extend the service life of the equipment. The slide rods 16 are fitted with springs 18. The bottom of the fixed plate 3 is fixedly connected to the top of the fixed seat 1. The outer wall of the bolt 9 is threadedly connected to the inner wall of the outer shell 14. The inner wall of the outer shell 14 is threadedly connected to two screws 13 to prevent the structure from loosening. The outer walls of the two screws 13 are slidably connected to baffles 12, which can effectively prevent the clamps 11 from slipping out due to excessive displacement. The top of the fixed seat 1 is provided with a slide groove 24. The outer side of the guide rail 19 is slidably connected to the inner wall of the slide groove 24. The inner walls of the two clamps 11 are in contact with the outer wall of the clamp head 10. The outer side of the telescopic rod 23 is engaged with the inner wall of the slide groove 24.

[0036] Working principle: By activating the hydraulic actuator 2, the fixed plate 3 is raised and lowered to a suitable position. The handle 8 of the upper clamp is rotated, which drives the bolt 9 to rotate. The clamp 10 fixedly connected to one side of the bolt 9 moves downward as the bolt 9 rotates. The two clamping blocks 11 fixed to the top of the clamp 10 slide downward along the inner wall of the outer shell 14 to clamp the workpiece firmly. The two baffles 12 installed on the outer wall of the outer shell 14 by screws 13 can effectively prevent the clamping blocks 11 from slipping out during the movement. Then, the motor 5 on the fixed plate 3 is activated. The motor 5 is equipped with a motor protective shell 4, which can effectively protect the motor 5 from damage. The support column 6 connected to one side of the upper base 7 at the drive end of the motor 5 can drive the limiting plate 15 and the clamp outer shell 14 to rotate, so as to perform a deep tensile test on the workpiece.

[0037] The clamp fixed at the bottom of the fixed base 1 also clamps the workpiece. The slide groove 24 opened at the top of the fixed base 1 allows the guide rail 19 to slide on it. The lower base 20 installed on the top of the guide rail 19 can fix the clamp on the lower side. Two telescopic rods 23 are installed on the inner wall of the guide rail 19. An adjustment plate 21 is fixedly connected to the adjacent side of the telescopic rods 23. The two adjustment plates 21 can move the two telescopic rods 23 to both ends through the small spring 22 in the middle. They can be fixed in the holes in the inner wall of the slide groove 24. The position can be adjusted by sliding the guide rail 19 for different positions. Then, the position of the guide rail 19 can be fixed by moving the adjustment plate 21. When the workpiece is stretched upward for testing, the fixed plate 3 is raised upward by the hydraulic device 2 and slides on the two slide rods 16. A shock-absorbing plate 17 and a connected spring 18 are installed on the top of the slide rods 16 to buffer the components on the fixed plate 3 and prevent the components from colliding and causing damage.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamp for tensile testing of geotechnical materials comprising a fixed seat (1), characterized in that: The top of the fixed seat (1) is fixedly connected with hydraulic devices (2) on both sides, the driving end of the two hydraulic devices (2) is fixedly connected with a fixed plate (3), the top of the fixed plate (3) is rotatably connected with an upper base (7), the top of the fixed seat (1) is slidably connected with a guide rail (19), the top of the guide rail (19) is provided with a lower base (20), the side of the lower base (20) and the side of the upper base (7) are fixedly connected with a supporting column (6), one side of the supporting column (6) is fixedly connected with a limiting plate (15), one side of the limiting plate (15) is fixedly connected with an outer shell (14), one side of the supporting column (6) is rotatably connected with a rotating handle (8), one side of the rotating handle (8) is fixedly connected with a bolt (9), one side of the bolt (9) is fixedly connected with a clamping head (10), the inner wall of the outer shell (14) is slidably connected with two clamping blocks (11), the top of the fixed seat (1) is provided with an adjusting assembly, and the top of the fixed plate (3) is provided with a driving assembly.

2. The soil material tensile test fixture of claim 1, wherein: The adjusting assembly comprises two telescopic rods (23), one side of the telescopic rod (23) is fixedly connected to the outside of the guide rail (19), the side of the two telescopic rods (23) is fixedly connected with a position adjusting plate (21), and the side of the two position adjusting plates (21) is fixedly connected with a small spring (22).

3. The soil material tensile test fixture of claim 1, wherein: The driving assembly comprises a motor protection shell (4), the inner wall of the motor protection shell (4) is fixedly connected with a motor (5), and the driving end of the motor (5) is fixedly connected to one side of the upper base (7).

4. The soil material tensile test fixture of claim 1, wherein: The inner wall of the fixed plate (3) is slidably connected with a slide rod (16) on both sides, the top of the slide rod (16) is slidably connected with a damping plate (17), the outside of the slide rod (16) is sleeved with a spring (18), and the bottom of the fixed plate (3) is fixedly connected to the top of the fixed seat (1).

5. The soil material tensile test fixture of claim 1, wherein: The outer wall of the bolt (9) is threadedly connected to the inner wall of the outer shell (14), the inner wall of the outer shell (14) is threadedly connected with two screws (13), and the outer wall of the two screws (13) is slidably connected with a baffle (12).

6. The soil material tensile test fixture of claim 2, wherein: The top of the fixed seat (1) is provided with a sliding groove (24), and the outside of the guide rail (19) is slidably connected to the inner wall of the sliding groove (24).

7. The apparatus of claim 6, wherein: The inner wall of the two clamping blocks (11) is in contact with the outer wall of the clamping head (10), and the outside of the telescopic rod (23) is clamped with the inner wall of the sliding groove (24).

8. The soil material tensile test gripper of claim 4, wherein: One end of the spring (18) is fixedly connected to one side of the slide rod (16), and the other end of the spring (18) is fixedly connected to one side of the damping plate (17).

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