A low temperature impact test specimen groove

Abstract

This utility model discloses a low-temperature impact test chamber, including a test chamber body with a bottom hole on the bottom surface. Several assembly cylinders are embedded and fixed to the bottom of the test chamber body. Through the designed assembly cylinders, top pillars, assembly holes, and inner plate, a metal sample is placed into the test chamber body. Then, the test chamber is placed into a device containing a low-temperature flowing medium. During placement, the bottom top pillar is compressed and pushed upwards, suspending the test chamber body within the test chamber body. This prevents the bottom of the sample from adhering to the bottom surface of the test chamber body. The adhering area cannot directly contact the low-temperature cooling medium, resulting in a much lower cooling rate in that area compared to other exposed areas. This accelerates the cooling rate of the test chamber, shortens the time required for the overall temperature of the sample to become uniform, and effectively avoids deviations in the material's mechanical properties testing due to localized temperature differences, thus affecting the accuracy of the test data.

Description

Technical Field

[0001] This utility model belongs to the technical field of low-temperature impact sample cell, specifically relating to a low-temperature impact sample cell. Background Technology

[0002] Low-temperature impact testing is an important method for evaluating the mechanical properties (especially toughness and impact resistance) of materials under low-temperature conditions, and it is widely used in the quality inspection and research and development of metallic materials. Its core principle is to simulate a low-temperature environment, apply high-speed impact loads to the material, observe the failure mode (such as brittle fracture or plastic deformation), and measure the impact absorption energy to determine the material's reliability at low temperatures.

[0003] The common cooling method for impact testing is alcohol solution. Alcohol is used as the heat transfer cooling medium. The sample is placed in the sample tank and completely immersed in the alcohol cooling medium. The cooling process needs to ensure that the temperature of the impact sample is uniform during the cooling process and avoid local temperature fluctuations affecting the test results of the sample. For this reason, the existing methods are to add multiple bottom holes and increase the diameter of the bottom holes to ensure the medium flow speed as fast as possible and thus increase the cooling speed. However, there are the following defects: (1) Although the existing low temperature impact sample tank can increase the medium flow speed by increasing the number and diameter of the bottom holes, when the metal sample is placed in the tank, the bottom surface of the metal sample and the inner surface of the tank are in contact with each other. The contact area cannot directly contact the low temperature cooling medium (such as alcohol solution), which results in the cooling rate of this area being much lower than that of other exposed areas. This not only prolongs the time for the overall temperature of the sample to become uniform, but also causes deviations in the test of material mechanical properties due to local temperature differences, affecting the accuracy of the test data. Therefore, we propose a low temperature impact sample tank. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature impact test chamber to solve the problem mentioned in the background art that the sample contact area in the low-temperature impact test chamber cannot directly contact the low-temperature cooling medium, resulting in the cooling rate of this area being much lower than that of other exposed areas. This not only prolongs the time for the overall temperature of the sample to become uniform, but also causes deviations in the test of material mechanical properties due to local temperature differences, affecting the accuracy of the test data.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature impact sample cell, comprising a sample cell body, a bottom hole on the bottom surface of the sample cell body, a plurality of assembly cylinders fixedly embedded at the bottom of the sample cell body, a top column slidably connected inside the assembly cylinder, an assembly hole on the surface of the top column, an inner plate penetrating through the assembly hole, and the inner plate being fixed to the inner wall of the assembly cylinder by welding.

[0006] Preferably, the bottom surface of the top post is provided with an adjusting screw groove, and an adjusting screw is threadedly connected to the adjusting screw groove.

[0007] Preferably, the longitudinal section of the adjusting stud is a T-shaped structure, and a rubber pad is fixed to the bottom end of the adjusting stud by adhesive bonding.

[0008] Preferably, the top column has a circular cross-section and an arc surface on its top surface.

[0009] Preferably, a spring is provided inside the assembly hole, and the spring is located at the bottom of the inner plate.

[0010] Preferably, the inner plate has a through hole on its surface, and a support rod runs through the through hole and the interior of the spring. The support rod is fixed to the inner end face of the assembly hole by welding.

[0011] Preferably, the outer wall of the assembly cylinder and the surface of the sample tank body are both fixed with ribs by welding, and the cross-section of the ribs is a triangular structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The metal sample is placed into the sample well body through the designed assembly cylinder, top column, assembly hole, and inner plate. Then, the present invention is placed into the device containing the low-temperature flowing medium. During placement, the bottom top column is squeezed and pushed upward, thereby lifting the sample in the sample well body and suspending the sample well body in the sample well body. This avoids the bottom of the sample touching the bottom surface of the sample well body. The touching area cannot directly contact the low-temperature cooling medium, resulting in a cooling rate in this area that is much lower than other exposed areas. This accelerates the cooling rate of the present invention, shortens the time for the overall temperature of the sample to become uniform, and also effectively avoids deviations in the material mechanical property test caused by local temperature differences, affecting the accuracy of the test data. Through the designed adjusting screw groove and adjusting stud, the adjusting stud and adjusting screw groove are screwed to adjust the overall length of the top column, ensuring that the sample is placed in the sample well. When handling irregularly shaped test samples, multi-point lifting and support can be achieved. The designed rubber pads are flexible, preventing damage caused by collisions between the bottom of the adjusting stud and the container when the sample is placed inside the cryogenic medium container. The designed arc surface on the top end of the top column ensures point-to-point contact between the top of the top column and the sample surface, preventing excessive contact area that could affect the test results. The designed spring compresses the top column as it lifts the sample. After removing the sample chamber from the cryogenic fluid and the sample, the compressed spring releases its elasticity, pushing the top column back into the assembly cylinder for subsequent sample placement. The designed support rod and through-hole, with the support rod inserted inside the spring, support the compressed spring, preventing changes in its position and maintaining its elasticity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged view of point A in the image;

[0016] Figure 3 This is a partial frontal structural cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the assembly of the top post and adjusting stud of this utility model;

[0018] Figure 5 This is a schematic diagram of the assembly of the assembly cylinder and inner plate of this utility model;

[0019] In the figure: 1. Sample tank body; 2. Bottom hole; 3. Assembly cylinder; 4. Arc surface; 5. Support rod; 6. Inner plate; 7. Spring; 8. Rib plate; 9. Top column; 10. Adjusting screw groove; 11. Adjusting screw; 12. Rubber pad; 13. Assembly hole; 14. Through hole. Detailed Implementation

[0020] 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.

[0021] Example

[0022] Please see Figures 1 to 5 This utility model provides a technical solution: a low-temperature impact test chamber, including a test chamber body 1. A bottom hole 2 is formed on the bottom surface of the test chamber body 1. Several assembly cylinders 3 are fixedly embedded in the bottom of the test chamber body 1. A top column 9 is slidably connected inside the assembly cylinder 3. An assembly hole 13 is formed on the surface of the top column 9. An inner plate 6 penetrates through the assembly hole 13. The inner plate 6 is welded to the inner wall of the assembly cylinder 3. A metal sample is placed into the test chamber body 1 through the designed assembly cylinders 3, top columns 9, assembly holes 13, and inner plate 6. Then, this utility model is placed into... In the device containing the low-temperature flowing medium, during placement, the bottom column 9 is compressed and pushed upwards, thereby lifting the sample in the sample tank body 1. This suspends the sample tank body 1 within the sample tank body 1, preventing the bottom of the sample from adhering to the bottom surface of the sample tank body 1. The adhering area cannot directly contact the low-temperature cooling medium, resulting in a cooling rate in this area that is much lower than other exposed areas. This accelerates the cooling rate of the present invention, shortens the time for the overall temperature of the sample to become uniform, and also effectively avoids deviations in the material mechanical property test caused by local temperature differences, thus affecting the accuracy of the test data.

[0023] In this embodiment, preferably, an adjustment groove 10 is provided on the bottom surface of the top column 9, and an adjustment stud 11 is threadedly connected to the adjustment groove 10. By adjusting the adjustment groove 10 and the adjustment stud 14, the overall length of the top column 9 can be adjusted by screwing the adjustment stud 14 and adjusting the adjustment groove 10, thereby ensuring that multi-point lifting support can be achieved when placing irregularly shaped test samples.

[0024] In this embodiment, preferably, the longitudinal section of the adjusting stud 11 is a T-shaped structure, and the bottom end of the adjusting stud 11 is fixed with a rubber pad 12 by adhesive. The rubber pad 12 is designed to be flexible, so that when the present invention is placed in the low temperature medium holding device, the bottom surface of the adjusting stud 11 and the holding device are prevented from colliding and causing damage.

[0025] In this embodiment, preferably, the cross-section of the top column 9 is a circular structure, and the top surface of the top column 9 is provided with an arc surface 4. By designing the arc surface 4, the top end face of the top column 9 is provided with an arc surface 4, so that the top of the top column 9 and the surface of the test sample are in contact at a point, thus avoiding the contact area between the top column 9 and the test sample being too large and affecting the test effect.

[0026] In this embodiment, preferably, a spring 7 is provided inside the assembly hole 13. When the top column 9 rises and lifts the test sample, the top column 9 will compress and squeeze the spring 7. After the test sample is removed from the sample tank body 1 in the low temperature fluid, the compressed spring 7 will release its elasticity in time, pushing the top column 9 to quickly return to its original position and slide into the assembly cylinder 3, so as to facilitate the subsequent placement of test samples. The spring 7 is located at the bottom of the inner plate 6.

[0027] In this embodiment, preferably, the surface of the inner plate 6 is provided with a through hole 14, and the through hole 14 and the interior of the spring 7 are connected by a support rod 5. Through the designed support rod 5 and through hole 14, the support rod 5 is inserted into the spring 7 to support the spring 7 in the compressed state, so as to avoid the change of position and shape of the spring 7 and achieve elasticity. The support rod 5 is fixed to the inner end face of the assembly hole 13 by welding.

[0028] In this embodiment, preferably, the outer wall of the assembly cylinder 3 and the surface of the sample tank body 1 are both fixed with ribs 8 by welding. The ribs 8 are designed and fixed to the outer wall of the assembly cylinder 3 and the sample tank body 1 by welding, thereby strengthening the assembly cylinder 3 by welding to prevent cracking and loosening. The cross-section of the ribs 8 is a triangular structure.

[0029] The working principle and usage process of this utility model are as follows: When conducting low-temperature tests, the metal sample is placed in the sample tank body 1, and then the utility model is placed in a device containing a low-temperature flowing medium. The adjusting stud 14 is screwed in, and the adjusting stud 14 and the adjusting screw groove 10 are screwed in to adjust the overall length of the top column 9. This ensures that even when placing irregularly shaped samples, multiple points of support and suspension can be achieved. During placement, the bottom top column 9 is compressed and pushed upwards, thereby lifting the sample in the sample tank body 1 and suspending the sample tank body 1 in the air, preventing the bottom of the sample from touching the bottom of the sample. The bottom surface of the sample tank body 1 and the contact area cannot directly contact the low-temperature cooling medium, resulting in a cooling rate in this area that is much lower than that in other exposed areas. This accelerates the cooling rate of the present invention, shortens the time for the overall temperature of the sample to become uniform, and also effectively avoids deviations in the mechanical property testing of materials caused by local temperature differences, thus affecting the accuracy of the test data. In addition, when the top column 9 rises to lift the sample, the top column 9 will compress and squeeze the spring 7. After the top column 9 lifts the sample tank body 1 from the low-temperature fluid and the sample is removed, the compressed spring 7 releases its elasticity in time, pushing the top column 9 to quickly return to its original position and slide into the assembly cylinder 3, so that the sample can be placed thereafter.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature impact test chamber, comprising a test chamber body (1), wherein a bottom hole (2) is formed on the bottom surface of the test chamber body (1), characterized in that: The bottom of the sample tank body (1) is fixed with several assembly cylinders (3) by embedding. The inside of the assembly cylinder (3) is connected to a top column (9) by sliding connection. The surface of the top column (9) is provided with an assembly hole (13). The inside of the assembly hole (13) is penetrated by an inner plate (6). The inner plate (6) is fixed to the inner wall of the assembly cylinder (3) by welding.

2. The low-temperature impact sample bath according to claim 1, characterized in that: The bottom surface of the top post (9) is provided with an adjusting screw groove (10), and an adjusting screw (11) is connected to the adjusting screw groove (10) by a thread.

3. The low-temperature impact sample bath according to claim 2, characterized in that: The longitudinal section of the adjusting stud (11) is a T-shaped structure, and the bottom end of the adjusting stud (11) is fixed with a rubber pad (12) by adhesive bonding.

4. The low-temperature impact test chamber according to claim 1, characterized in that: The top column (9) has a circular cross-section, and the top surface of the top column (9) is provided with an arc surface (4).

5. The low-temperature impact sample bath according to claim 1, characterized in that: A spring (7) is provided inside the assembly hole (13), and the spring (7) is located at the bottom of the inner plate (6).

6. The low-temperature impact sample bath according to claim 5, characterized in that: The inner plate (6) has a through hole (14) on its surface. The through hole (14) and the spring (7) are connected by a support rod (5). The support rod (5) is fixed to the inner end face of the assembly hole (13) by welding.

7. The low-temperature impact sample bath according to claim 1, characterized in that: The outer wall of the assembly cylinder (3) and the surface of the sample tank body (1) are both fixed with ribs (8) by welding. The cross-section of the ribs (8) is a triangular structure.

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