Sample preparation mold matched with X-ray CT chromatography scanning wedging splitting tension experiment

Abstract

The utility model discloses a sample preparation mould matched with an X-ray CT (Computed Tomography) chromatography scanning wedging splitting tension experiment, which comprises a bottom plate and an upper mould arranged on the bottom plate, the top of the bottom plate is also fixedly connected with a partition plate, and the upper mould is sleeved on the periphery of the partition plate. According to the sample preparation mold matched with the X-ray CT chromatographic scanning wedge-in split-pull experiment, a plurality of small cavities are formed through the arrangement of the bottom plate, the upper mold, the partition plates, the rectangular clamping plates and the rectangular protruding blocks, convenient conditions are provided for batch production of samples, the manufactured samples can effectively adapt to the X-ray CT chromatographic scanning wedge-in split-pull experiment, and the sample preparation efficiency is improved. Through cooperation of an inclined supporting plate, an anti-falling plate, a positioning rod, a pressing plate, a spring and a semicircular groove, the stability of connection between the upper die and the bottom plate is guaranteed, under the arrangement of positioning holes, convenient conditions are provided for assembly of the first isosceles trapezoid plate, the second isosceles trapezoid plate and the inclined supporting plate, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of specimen molds, in particular to a specimen preparation mold for an X-ray CT tomography wedge splitting test. Background Technique

[0002] The cracking problem of concrete has always been widely concerned in the engineering field. In many practical projects, concrete components usually generate cracks to a certain extent during hardening or after being put into use, that is to say, concrete components often work with cracks. Therefore, compared with the strength of the theoretical model, the actual strength of concrete material components is often lower. For example, in the process of pouring and curing of some mass concrete projects, cracks are very likely to occur. Although the bearing capacity of these concrete structures with cracks will not decrease immediately, under the action of load, with the passage of time, the original cracks will gradually continue to crack until unstable failure. Therefore, it is necessary to conduct in-depth research on the crack propagation of concrete under load to provide better analysis and prediction for fracture behavior. However, the current fracture performance testing and analysis are mainly based on macroscopic mechanical experiments and cannot deeply analyze the internal failure characteristics and mechanisms. Therefore, experimental exploration at the micro and meso levels is urgently needed to study the internal failure characteristics and mechanisms of concrete materials.

[0003] When the X-ray CT tomography scanner is applied to the wedge splitting test, it can monitor and track the fracture process of the specimen without damage, in-situ and continuously, providing a large amount of accurate fracture experimental data. In addition, due to certain limitations of the X-ray CT tomography scanner on the size of the test block to be tested, high-precision experimental data can be obtained to explore the failure process at the micro and meso levels and analyze the failure mechanism.

[0004] In order to obtain a large amount of experimental data, a large number of specimens need to be made. Therefore, a specimen preparation mold for an X-ray tomography wedge splitting test, which can make a relatively large number of specimens at one time and is used to make small-size mortar specimens or concrete specimens, is specially proposed. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a specimen preparation mold for an X-ray CT tomography wedge splitting test, which solves the above problems.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present utility model provides the following technical solution: A sample preparation mold for an X-ray CT tomography wedge splitting test, comprising a bottom plate and an upper mold disposed on the bottom plate. A partition is further fixedly connected to the top of the bottom plate. The upper mold is sleeved on the outer periphery of the partition and is in contact with the top of the bottom plate. The partition divides the interior of the upper mold into two large cavities, and a number of rectangular clamping plates are clamped between the front and rear sides of the inner cavity of the upper mold and the front and rear sides of the partition. The number of rectangular clamping plates divides the two large cavities into a number of small cavities. A rectangular raised block is fixedly connected to the top of the bottom plate and located inside each small cavity. The partition is vertically and crosswise arranged with a number of rectangular raised blocks.

[0009] Preferably, the upper mold includes two first isosceles trapezoidal plates and two second isosceles trapezoidal plates. One inclined surface of one first isosceles trapezoidal plate is respectively in contact with one inclined surface of the two second isosceles trapezoidal plates, and the two inclined surfaces on both sides of the other first isosceles trapezoidal plate are respectively in contact with the other inclined surface of the two second isosceles trapezoidal plates.

[0010] Preferably, grooves are provided between the opposite sides of the two first isosceles trapezoidal plates and the front and rear sides of the partition. The grooves are in sliding fit with the rectangular clamping plates, and the bottom of the rectangular clamping plate is in contact with the top of the bottom plate.

[0011] Preferably, inclined support plates are fixedly connected to the four corners of the top of the bottom plate. Assembly grooves adapted to the inclined support plates are provided on the inclined surfaces of the first isosceles trapezoidal plates and the second isosceles trapezoidal plates.

[0012] Preferably, a anti-disengagement plate is rotatably installed on the top of the inclined support plate. Two positioning rods penetrate through and are slidably installed on the top of the anti-disengagement plate. The top ends of the two positioning rods are fixedly connected together with a pressing plate. A spring is fixedly connected between the bottom of the pressing plate and the top of the anti-disengagement plate;

[0013] Semicircular grooves adapted to the positioning rods are provided on the inclined surfaces of the first isosceles trapezoidal plates and the second isosceles trapezoidal plates;

[0014] The bottom of the pressing plate is in sliding contact with the tops of the first isosceles trapezoidal plates and the second isosceles trapezoidal plates respectively.

[0015] Preferably, two positioning holes adapted to the positioning rods are provided on the top of the inclined support plate.

[0016] (III) Beneficial effects

[0017] The present utility model provides a sample preparation mold for an X-ray CT tomography wedge splitting test. It has the following beneficial effects:

[0018] (1) By providing a bottom plate, an upper die, a partition plate, a rectangular clamping plate and a rectangular raised block, the utility model forms several small cavities, which provides convenient conditions for the batch production of specimens, and the specimens produced can effectively adapt to the wedge splitting tensile test of X-ray CT tomography scanning.

[0019] (2) By providing a groove and a rectangular clamping plate, the utility model provides convenient operating conditions for the generation of several small cavities.

[0020] (3) By providing an inclined support plate, the utility model realizes the circumferential limit of the first isosceles trapezoidal plate and the second isosceles trapezoidal plate, ensures the relative stability of the positions between the first isosceles trapezoidal plate and the second isosceles trapezoidal plate. With the cooperation of an anti-disengagement plate, a positioning rod, a pressing plate, a spring and a semi-circular groove, the pressing plate is used to limit the tops of the first isosceles trapezoidal plate and the second isosceles trapezoidal plate, ensuring the stability of the connection between the upper die and the bottom plate. With the setting of positioning holes, it provides convenient conditions for the assembly of the first isosceles trapezoidal plate and the second isosceles trapezoidal plate with the inclined support plate, making it more convenient to use. Description of the Drawings

[0021] Figure 1 is the external structural schematic diagram of the utility model;

[0022] Figure 2 is the structural schematic diagram of the upper die of the utility model;

[0023] Figure 3 is the connection schematic diagram of the structures of the bottom plate, partition plate, rectangular raised block, inclined support plate, anti-disengagement plate, positioning rod and pressing plate of the utility model;

[0024] Figure 4 is the connection schematic diagram of the structures of the die, partition plate, large cavity, rectangular raised block and groove of the utility model;

[0025] Figure 5 is the connection schematic diagram of the structures of the second isosceles trapezoidal plate, inclined support plate, anti-disengagement plate, positioning rod, pressing plate, spring and semi-circular groove of the utility model;

[0026] Figure 6 is the connection schematic diagram of the structures of the bottom plate, inclined support plate, anti-disengagement plate, positioning rod, pressing plate, spring and positioning hole of the utility model.

[0027] In the figure, 1. bottom plate; 2. upper die; 3. partition plate; 4. large cavity; 5. rectangular clamping plate; 6. small cavity; 7. rectangular raised block; 8. first isosceles trapezoidal plate; 9. second isosceles trapezoidal plate; 10. groove; 11. inclined support plate; 12. assembly groove; 13. anti-disengagement plate; 14. positioning rod; 15. pressing plate; 16. spring; 17. semi-circular groove; 18. positioning hole. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Please refer to Figure 1-6 , the embodiment of the present invention provides a technical solution: a sample preparation mold for an X-ray CT tomographic scanning wedge splitting test, including a bottom plate 1 and an upper mold 2 provided on the bottom plate 1. Specifically, the upper mold 2 includes two first isosceles trapezoidal plates 8 and two second isosceles trapezoidal plates 9. Two inclined surfaces of one first isosceles trapezoidal plate 8 are respectively in contact with one inclined surface of the two second isosceles trapezoidal plates 9, and two inclined surfaces on both sides of the other first isosceles trapezoidal plate 8 are respectively in contact with the other inclined surface of the two second isosceles trapezoidal plates 9. To ensure the stability of the rectangular space formed by the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9, inclined support plates 11 are fixedly connected to the four sides of the top of the bottom plate 1, and assembly grooves 12 adapted to the inclined support plates 11 are provided on the inclined surfaces of the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9.

[0030] As a preferred solution, in order to achieve the production of more specimens in one batch, a partition plate 3 is also fixedly connected to the top of the bottom plate 1. The upper mold 2 is sleeved on the outer periphery of the partition plate 3 and is in contact with the top of the bottom plate 1. The partition plate 3 divides the rectangular space surrounded by the upper mold 2 into two large cavities 4, and a number of rectangular clamping plates 5 are clamped between the front and rear sides of the inner cavity of the upper mold 2 and the front and rear sides of the partition plate 3. Specifically, grooves 10 are provided between the opposite sides of the two first isosceles trapezoidal plates 8 and the front and rear sides of the partition plate 3. The grooves 10 are slidably matched with the rectangular clamping plates 5, and the bottom of the rectangular clamping plates 5 is in contact with the top of the bottom plate 1. A number of rectangular clamping plates 5 divide the two large cavities 4 into a number of small cavities 6, and rectangular raised blocks 7 are fixedly connected to the top of the bottom plate 1 and located inside each small cavity 6. The partition plate 3 is vertically and crosswise arranged with a number of rectangular raised blocks 7.

[0031] As a preferred solution, in order to ensure the stable contact between the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9 and the bottom plate 1, an anti-detachment plate 13 is rotatably installed on the top of the inclined support plate 11. Specifically, as shown in the appendix Figure 6As shown, a stepped hole is opened at the bottom of the base plate 1, and a through hole connected to the stepped hole is opened at the top of the inclined support plate 11, and a rotating shaft is fixedly installed at the bottom of the anti-slip plate 13. After the rotating shaft passes through the through hole, it extends to the first step surface of the stepped hole, and a fixed limit plate is welded. In this way, when the anti-slip plate 13 rotates, the anti-slip plate 13 will not be separated from the inclined support plate 11. Two positioning rods 14 are penetrated and slidably installed on the top of the anti-slip plate 13, and the tops of the two positioning rods 14 are fixedly connected with a pressure plate 15. A spring 16 is fixedly connected between the bottom of the pressure plate 15 and the top of the anti-slip plate 13. The inclined surfaces of the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9 are both provided with semicircular grooves 17 adapted to the positioning rods 14, and the bottoms of the pressure plates 15 are in sliding contact with the tops of the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9 respectively.

[0032] As a preferred solution, in order to facilitate the assembly of the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9 onto the inclined support plate 11 , two positioning holes 18 matched with the positioning rods 14 are opened on the top of the inclined support plate 11 .

[0033] When working, the pressing plate 15 is pulled upward, and the pressing plate 15 stretches the spring 16. At the same time, the pressing plate 15 drives the positioning rod 14 to move upward until the anti-slip plate 13 can be rotated onto the inclined support plate 11, and the inclination angle of the anti-slip plate 13 coincides with the inclined support plate 11. At this time, the pressing plate 15 is released, the spring 16 is reset, and the pressing plate 15 is driven down, and the pressing plate 15 drives the positioning rod 14 to move into the positioning hole 18;

[0034] The assembly grooves 12 on the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9 are respectively sleeved on the two inclined support plates 11. After the installation of the two first isosceles trapezoidal plates 8 and the two second isosceles trapezoidal plates 9 is completed, the two first isosceles trapezoidal plates 8 and the two second isosceles trapezoidal plates 9 form a rectangular space. At this time, the pressure plate 15 is pulled upward, and the pressure plate 15 stretches the spring 16. At the same time, the pressure plate 15 drives the positioning rod 14 to move upward and disengage from the positioning hole 18, and then the anti-slip plate 13 is rotated until the positioning rod 14 moves to the semicircular groove 17. At this time, the pressure plate 15 is released, and the spring 16 is reset, driving the pressure plate 15 to descend, and the pressure plate 15 drives the positioning rod 14 to move to the circular groove surrounded by the two semicircular grooves 17. At this time, the pressure plate 15 limits the top of the first isosceles trapezoidal plate 8 and the second isosceles trapezoidal plate 9;

[0035] Insert the rectangular card plate 5 into the two grooves 10 set at the front and back to obtain a plurality of small cavities 6. Inject concrete or mortar into the small cavities 6. After it solidifies, a plurality of X-ray CT tomography scanning wedge splitting test specimens can be obtained.

Claims

1. A sample preparation mold for the wedge splitting test in X-ray CT tomography scanning, comprising a bottom plate (1) and an upper mold (2) arranged on the bottom plate (1), characterized in that: A partition plate (3) is also fixedly connected to the top of the bottom plate (1). The upper die (2) is sleeved on the outer periphery of the partition plate (3) and is in contact with the top of the bottom plate (1). The partition plate (3) divides the interior of the upper die (2) into two large cavities (4). A number of rectangular clamping plates (5) are clamped between the front and rear sides of the inner cavity of the upper die (2) and the front and rear sides of the partition plate (3). The number of rectangular clamping plates (5) divides the two large cavities (4) into a number of small cavities (6). A rectangular raised block (7) is fixedly connected to the top of the bottom plate (1) and inside each small cavity (6). The partition plate (3) is vertically and crosswise arranged with a number of rectangular raised blocks (7).

2. The sample preparation mold for the X-ray CT tomographic scanning wedge splitting test according to claim 1, wherein: The upper die (2) includes two first isosceles trapezoidal plates (8) and two second isosceles trapezoidal plates (9). One inclined surface of one first isosceles trapezoidal plate (8) is respectively in contact with one inclined surface of the two second isosceles trapezoidal plates (9). The other two inclined surfaces of the other first isosceles trapezoidal plate (8) are respectively in contact with the other inclined surface of the two second isosceles trapezoidal plates (9).

3. The sample preparation mold for the X-ray CT tomographic wedge splitting test according to claim 2, characterized in that: Grooves (10) are formed between the opposite sides of the two first isosceles trapezoidal plates (8) and the front and rear sides of the partition plate (3). The grooves (10) are in sliding fit with the rectangular clamping plates (5), and the bottom of the rectangular clamping plates (5) is in contact with the top of the bottom plate (1).

4. The sample preparation mold for the X-ray CT tomographic wedge splitting test according to claim 2, characterized in that: Inclined support plates (11) are fixedly connected to the four peripheries of the top of the bottom plate (1). Assembly grooves (12) adapted to the inclined support plates (11) are formed on the inclined surfaces of the first isosceles trapezoidal plates (8) and the second isosceles trapezoidal plates (9).

5. A sample preparation mold for the X-ray CT tomographic wedge splitting test according to claim 4, characterized in that: An anti - detachment plate (13) is rotatably installed at the top of the inclined support plate (11). Two positioning rods (14) penetrate through and are slidably installed at the top of the anti - detachment plate (13). The top ends of the two positioning rods (14) are fixedly connected together with a pressing plate (15). A spring (16) is fixedly connected between the bottom of the pressing plate (15) and the top of the anti - detachment plate (13). Semicircular grooves (17) adapted to the positioning rods (14) are formed on the inclined surfaces of the first isosceles trapezoidal plates (8) and the second isosceles trapezoidal plates (9). The bottom of the pressing plate (15) is in sliding contact with the tops of the first isosceles trapezoidal plates (8) and the second isosceles trapezoidal plates (9).

6. The sample preparation mold for the X-ray CT tomographic wedge splitting test according to claim 5, characterized in that: Two positioning holes (18) adapted to the positioning rods (14) are formed at the top of the inclined support plate (11).

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