Cold and hot table structure for mechanical compression test

Abstract

The utility model discloses a cold and hot table structure for a mechanical compression test, which comprises a cold and hot table cavity, a variable temperature sample table is arranged at one end in the cold and hot table cavity, and a liquid nitrogen joint is arranged on one side of the cold and hot table cavity; under the cooperation of the liquid nitrogen connector and the variable-temperature sample table, in the test process, temperature change can be rapidly carried out, so that the temperature of a sample is changed, more test data are obtained, the test accuracy is improved, the interior of the cold and hot table cavity can be in a vacuum environment through the water cooling connector, and the test efficiency is improved. The temperature sensor connector is used for testing the temperature of different positions in the sample, the temperature difference is prevented from being too large, meanwhile, the vacuum connector is used for keeping the temperature of the cavity close to the room temperature, and meanwhile the positions of the upper end ejector rod sleeve and the lower end ejector rod sleeve are adjusted according to the size of the sample. The device can adapt to different samples, and the samples can be conveniently clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of compression testing, in particular to a cold and hot table structure used for mechanical compression testing. Background Art

[0002] Compression test is a commonly used material mechanical property testing method, which is used to evaluate the performance and behavior of materials under pressure. In order to obtain more data, the temperature of the material needs to be changed during the test to better evaluate the material.

[0003] The existing authorization publication number is "CN214408446U", which is a bidirectional compression mechanical testing device for non-metallic materials. It includes a matched upper clamp and a lower clamp, the upper clamp includes an upper clamp body and an upper loading platform arranged on the top of the upper clamp body, and a connecting head is fixedly connected to the upper loading platform; the lower clamp includes a lower clamp body and a lower loading platform arranged at the lower end of the lower clamp body, and a bottom clamping end is fixedly connected to the lower loading platform; the upper clamp body and the lower clamp body are buckled with each other, and the area between the upper clamp body and the lower clamp body is the clamping area; the utility model has a simple structure, is easy to use, and has a low cost, and can be used as a clamp for biaxial high and low speed compression mechanical tests of non-metallic materials on high-speed tensile testing machines as well as traditional universal material testing machines.

[0004] However, during use, the device simply performs compression tests on the materials, and such tests cannot yield more data. Most materials are located in different environments, and therefore have different temperatures, and thus the device cannot test materials at different temperatures. Utility Model Content

[0005] The purpose of the utility model is to provide a hot and cold stage structure for mechanical compression testing to solve the existing problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot and cold stage structure for mechanical compression test, comprising a hot and cold stage cavity, a variable temperature sample stage is arranged at one end of the hot and cold stage cavity, a liquid nitrogen joint is arranged on one side of the hot and cold stage cavity, the liquid nitrogen joint and the variable temperature sample stage are connected to each other, a temperature sensor joint is arranged in the middle of the hot and cold stage cavity away from the liquid nitrogen joint, vacuum joints are arranged on the top and bottom of both sides of the hot and cold stage cavity, a water cooling joint is arranged on one side of the top of the hot and cold stage cavity, and a temperature sensor joint is arranged in the middle of the top of the hot and cold stage cavity. An upper push rod is provided in the middle, and the bottom of the upper push rod extends to the interior of the cold and hot table cavity, the bottom of the upper push rod is provided with an upper push rod sleeve, the bottom of the upper push rod sleeve is provided with a lower push rod sleeve, a sample is provided between the upper push rod sleeve and the lower push rod sleeve, one end of the upper push rod sleeve is provided with a heat-conducting cover plate, and the heat-conducting cover plate is connected to the lower push rod sleeve, heat-conducting rails are respectively provided on both sides of the upper push rod sleeve and the lower push rod sleeve, the bottom of the lower push rod sleeve is provided with a lower push rod, and an upper cover is provided at one end of the cold and hot table cavity.

[0007] Preferably, a mounting hole is provided on one side of the hot and cold stage cavity, and one side of the liquid nitrogen connector extends to the inside of the mounting hole and is connected to the variable temperature sample stage, so as to facilitate installation.

[0008] Preferably, a bellows is provided on the outer side of the upper end push rod, and the bellows is connected to the cold and hot stage cavity to facilitate guiding.

[0009] Preferably, a mounting frame is provided at one end of the upper cover, and a glass observation window is provided on the inner side of the mounting frame to observe the situation during the test.

[0010] Preferably, the upper and lower push rods and their outer sides are all provided with flanges, and the flanges are connected to the cold and hot stage cavity to ensure the stability of the connection.

[0011] Preferably, a plurality of groups of bolts are provided at four corners of one end of the heat-conducting cover plate, and the heat-conducting cover plate is connected to the vacuum joint through the bolts to fix the position of the heat-conducting cover plate.

[0012] Preferably, a liquid nitrogen pipeline is provided inside the variable temperature sample stage, and a temperature sensor and a heating rod are integrated inside the variable temperature sample stage, so as to facilitate the temperature control of the variable temperature sample stage.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the hot and cold stage structure for mechanical compression test;

[0014] With the cooperation of the liquid nitrogen joint and the variable temperature sample stage, the temperature can be changed quickly during the test to change the temperature of the sample, so as to obtain more test data and improve the accuracy of the test. The water-cooling joint can make the interior of the hot and cold stage cavity in a vacuum environment to prevent the sample from frosting at low temperatures, and the temperature sensor joint can be used to test the temperature at different positions inside to avoid excessive temperature differences. At the same time, the vacuum joint is used to keep the cavity temperature close to room temperature. At the same time, the position of the upper and lower ejector sleeves is adjusted according to the size of the sample, so that the device can adapt to different samples and facilitate the clamping of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional view of the top of the utility model;

[0016] Figure 2 For the utility model Figure 1 A magnified image of point A;

[0017] Figure 3 The main view of the utility model Figure 1 ;

[0018] Figure 4 The main view of the utility model Figure 2 .

[0019] In the figure: 1. Hot and cold stage cavity; 2. Variable temperature sample stage; 3. Temperature sensor connector; 4. Liquid nitrogen connector; 5. Vacuum connector; 6. Water cooling connector; 7. Bellows; 8. Top rod; 9. Bottom rod; 10. Top cover; 11. Mounting frame; 12. Heat conduction rail; 13. Bottom rod sleeve; 14. Heat conduction cover plate; 15. Sample; 16. Top rod sleeve. DETAILED DESCRIPTION

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

[0021] See also Figure 1-Figure 4The utility model provides an embodiment: a hot and cold stage structure for mechanical compression test, including a hot and cold stage cavity 1, a variable temperature sample stage 2 is provided at one end of the hot and cold stage cavity 1, a liquid nitrogen pipeline is provided inside the variable temperature sample stage 2, and a temperature sensor and a heating rod are integrated inside the variable temperature sample stage 2 to facilitate the temperature control of the variable temperature sample stage 2, a liquid nitrogen connector 4 is provided on one side of the hot and cold stage cavity 1, a mounting hole is provided on one side of the hot and cold stage cavity 1, one side of the liquid nitrogen connector 4 extends to the inside of the mounting hole and is interconnected with the variable temperature sample stage 2 to facilitate installation, the liquid nitrogen connector 4 is interconnected with the variable temperature sample stage 2, and a temperature sensor connector 3 is provided in the middle of the hot and cold stage cavity 1 away from the liquid nitrogen connector 4. , vacuum joints 5 are respectively provided at the top and bottom of both sides of the cold and hot stage cavity 1, a water cooling joint 6 is provided on one side of the top of the cold and hot stage cavity 1, an upper end push rod 8 is provided in the middle of the top of the cold and hot stage cavity 1, a bellows 7 is provided on the outer side of the upper end push rod 8, and the bellows 7 is connected to the cold and hot stage cavity 1 for easy guidance, the bottom of the upper end push rod 8 extends to the inside of the cold and hot stage cavity 1, an upper end push rod sleeve 16 is provided at the bottom of the upper end push rod 8, a lower end push rod sleeve 13 is provided at the bottom of the upper end push rod sleeve 16, a sample 15 is provided between the upper end push rod sleeve 16 and the lower end push rod sleeve 13, a heat conductive cover plate 14 is provided at one end of the upper end push rod sleeve 16, and the heat conductive cover plate 14 is connected to the lower end push rod sleeve 13;

[0022] A plurality of groups of bolts are provided at the four corners of one end of the heat-conducting cover plate 14, and the heat-conducting cover plate 14 is connected to the vacuum joint 5 by bolts to fix the position of the heat-conducting cover plate 14, and heat-conducting rails 12 are provided on both sides of the upper end push rod sleeve 16 and the lower end push rod sleeve 13, respectively, and a lower end push rod 9 is provided at the bottom of the lower end push rod sleeve 13, and flanges are provided on the outer sides of the upper end push rod 8 and the lower end push rod 9, and the flanges are connected to the cold and hot stage cavity 1 to ensure the stability of the connection, and an upper cover 10 is provided at one end of the cold and hot stage cavity 1, and a mounting frame 11 is provided at one end of the upper cover 10, and a glass observation window is provided on the inner side of the mounting frame 11 to observe the situation during the test.

[0023] Working principle: During the test, the sample 15 is first placed between the upper push rod sleeve 16 and the lower push rod sleeve 13, and the sample 15 is clamped by the upper push rod sleeve 16 and the lower push rod sleeve 13, and then the heat conductive cover plate 14 is installed on the sample 15 to block the sample. At this time, the upper cover 10 is placed on the cold and hot stage cavity 1 to cover the cold and hot stage cavity 1 as a whole to ensure the sealing condition inside the cold and hot stage cavity 1, and then the air inside the cold and hot stage cavity 1 is extracted through the water cooling joint 6 to make The interior of the hot and cold stage cavity 1 is in a vacuum environment, and a water cooling pipe is connected to the vacuum joint 5 to ensure that the interior of the hot and cold stage cavity 1 is always kept at room temperature. At this time, liquid nitrogen is introduced into the interior of the liquid nitrogen joint 4, and the liquid nitrogen then enters the interior of the variable temperature sample stage 2 to cool the sample 15, and the temperature of the variable temperature sample stage 2 is controlled by the temperature sensor inside the variable temperature sample stage 2. When the temperature is too low, the heating rod inside the variable temperature sample stage 2 heats the variable temperature sample stage 2 to ensure the temperature of the sample.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A hot and cold stage structure for mechanical compression testing, comprising a hot and cold stage cavity (1), characterized in that: A variable temperature sample stage (2) is provided at one end of the cold and hot stage cavity (1), a liquid nitrogen joint (4) is provided on one side of the cold and hot stage cavity (1), and the liquid nitrogen joint (4) is connected to the variable temperature sample stage (2). A temperature sensor joint (3) is provided in the middle of the cold and hot stage cavity (1) away from the liquid nitrogen joint (4). Vacuum joints (5) are provided at the top and bottom of both sides of the cold and hot stage cavity (1), respectively. A water cooling joint (6) is provided on one side of the top of the cold and hot stage cavity (1). An upper end push rod (8) is provided in the middle of the top of the cold and hot stage cavity (1), and the bottom of the upper end push rod (8) extends to the inside of the cold and hot stage cavity (1). An upper end push rod sleeve (16) is provided at the bottom of the end push rod (8), a lower end push rod sleeve (13) is provided at the bottom of the upper end push rod sleeve (16), a sample (15) is provided between the upper end push rod sleeve (16) and the lower end push rod sleeve (13), a heat conductive cover plate (14) is provided at one end of the upper end push rod sleeve (16), and the heat conductive cover plate (14) is connected to the lower end push rod sleeve (13), heat conductive guide rails (12) are provided on both sides of the upper end push rod sleeve (16) and the lower end push rod sleeve (13), a lower end push rod (9) is provided at the bottom of the lower end push rod sleeve (13), and an upper cover (10) is provided at one end of the hot and cold table cavity (1).

2. A hot and cold stage structure for mechanical compression testing according to claim 1, characterized in that: A mounting hole is provided on one side of the hot / cold stage cavity (1), and one side of the liquid nitrogen joint (4) extends into the mounting hole and is connected to the variable temperature sample stage (2).

3. A hot and cold stage structure for mechanical compression testing according to claim 1, characterized in that: A bellows (7) is provided on the outer side of the upper end push rod (8), and the bellows (7) is connected to the cold and hot stage cavity (1).

4. A hot and cold stage structure for mechanical compression testing according to claim 1, characterized in that: A mounting frame (11) is provided at one end of the upper cover (10), and a glass observation window is provided on the inner side of the mounting frame (11).

5. The hot and cold stage structure for mechanical compression test according to claim 1, characterized in that: The upper end push rod (8) and the lower end push rod (9) and the outer sides are all provided with flanges, and the flanges are connected to the cold and hot stage cavity (1).

6. A hot and cold stage structure for mechanical compression testing according to claim 1, characterized in that: A plurality of groups of bolts are provided at the four corners of one end of the heat-conducting cover plate (14), and the heat-conducting cover plate (14) is connected to the vacuum joint (5) via the bolts.

7. A hot and cold stage structure for mechanical compression testing according to claim 1, characterized in that: A liquid nitrogen pipeline is provided inside the variable temperature sample stage (2), and a temperature sensor and a heating rod are integrated inside the variable temperature sample stage (2).

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