High and low temperature environment test mechanism

Abstract

The utility model discloses a high and low temperature environment testing mechanism, which comprises an environment box, a video extensometer and a testing machine, the environment box is installed between a test sample clamping structure and a test bed of the testing machine, and the video extensometer is installed above the test bed of the testing machine and is located at the outer side of the environment box; the environment box is provided with at least two side windows, and the at least two video extensometers are respectively arranged on the outer sides of the two side windows to track the deformation of a test sample in a test; the testing machine is provided with stand columns, the stand columns are located at windows on the two sides of the environment box, and an included angle is formed between the connecting line between the two stand columns and the connecting line between the two video extensometers. According to the technical scheme, the windows on the two sides are arranged, so that the deformation process of the sample is observed on the two symmetrical sides; the double video extensometers realize measurement and tracking of deformation on two sides, so that the test efficiency is improved, and the operation difficulty is reduced; the stand column of the testing machine and the video extensometer are arranged at an angle, so that the problem that the stand column shields left and right windows is effectively solved, and irradiation of the video extensometer to a sample in an environment box is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of testing equipment, in particular to a testing mechanism which uses a high and low temperature environment box with three windows, a dual video extensometer and a universal mechanical testing machine to achieve tracking measurement of deformation on both sides of a mechanical testing sample. Background Art

[0002] With the development and progress of science and technology, new materials continue to emerge, and the performance test of new materials has become an important means to obtain the performance parameters of new materials. At present, the use of video extensometers is becoming more and more common in mechanical tests of high and low temperature materials, which improves the test efficiency and the test environment; however, the environmental chambers that are now widely used with video extensometers are all single front window structures, which seriously limits the use of dual video extensometers, resulting in tests with similar requirements such as ASTM D6641 and other related tests. Dual video extensometers cannot be used, and only cumbersome contact deformation measurement devices can be used, such as strain gauges on both sides; therefore, it is urgent to develop a new high and low temperature environment test mechanism to improve the limitations of the test mechanism caused by this single window environmental chamber. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a high and low temperature environment testing mechanism.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high and low temperature environment testing mechanism, comprising an environmental chamber, a video extensometer and a testing machine, wherein the environmental chamber is installed between a sample clamping structure and a test bench of the testing machine, and the video extensometer is installed above the test bench of the testing machine and is located outside the environmental chamber; wherein,

[0006] The environmental chamber has a body and a viewing window and a fixture port arranged on the body, wherein the viewing window has at least two side viewing windows, and the fixture port is arranged on the body between the two side viewing windows, and the fixture device of the testing machine is used to clamp the sample from the fixture port for testing;

[0007] At least two video extensometers are provided, which are respectively arranged outside the two side windows to track the deformation of the test sample during the test;

[0008] The testing machine has columns, which are located at the windows on both sides of the environmental chamber, and a line connecting the two columns and a line connecting the two video extensometers form an angle.

[0009] Furthermore, the environmental chamber has a chamber door, and a front viewing window is also provided on the chamber door, forming an environmental chamber structure with three viewing windows.

[0010] Furthermore, the two side windows of the environmental chamber are located in the b direction of the body, the front window is located in the c direction of the body, and the fixture port is located in the a direction of the body, and the a direction, b direction and c direction are perpendicular to each other.

[0011] Furthermore, the three windows of the environmental chamber are all made of optical glass with high light transmittance, and the optical glass adopts a three-layer structure to ensure good thermal insulation performance.

[0012] Furthermore, the video extensometer is always located on the same testing straight line as the sample in the environmental chamber body, and the straight line extends along the b direction.

[0013] Furthermore, the angle α between the line connecting the two upright posts of the testing machine and the line connecting the two video extensometers is 0°≤α≤25°.

[0014] Furthermore, the testing machine is a universal testing machine with symmetrically arranged columns and / or a testing machine with asymmetrically arranged columns.

[0015] Furthermore, the testing machine adopts a universal testing machine with symmetrically arranged columns, the video extensometer is located on the side of the columns, and the environmental chamber is inclined relative to the line between the two symmetrical columns of the testing machine, with an inclination angle of β, and the angle difference between β and α is 90°.

[0016] Furthermore, the testing machine is a universal testing machine with symmetrically arranged columns, the testing machine is widened in width, the video extensometer is arranged between the column and the side window, and the three are located on the same test straight line.

[0017] Furthermore, the testing machine adopts an asymmetrically arranged column, the video extensometer is located on the side of the column, the two columns are located at the diagonals of the testing machine, and the environmental chamber and the testing machine are arranged in a positive direction.

[0018] Based on the above high and low temperature environment test mechanism, it has the following beneficial effects:

[0019] (1) This technical solution is different from the conventional environmental chamber with only a front window. Side windows are provided on both sides, so that the deformation process of the sample can be observed on both sides of the sample;

[0020] (2) This technical solution uses a dual video extensometer to measure and track deformation on both sides;

[0021] Compared with the use of contact extensometers, the application of dual video extensometers greatly improves the efficiency of the test and greatly reduces the difficulty of operation;

[0022] (3) When the test machine of the technical solution adopts the existing universal testing machine, the environmental chamber is tilted at a certain angle relative to the testing machine, and the video extensometers arranged on both sides are also tilted at a certain angle, so that the sample in the environmental chamber can be illuminated, thereby completing the deformation tracking, and effectively solving the problem of the testing machine column blocking the left and right side windows;

[0023] (4) When the test machine of the technical solution adopts a test machine with an asymmetrical arrangement of columns, it is convenient to irradiate the sample without tilting the environmental chamber, and a more ideal irradiation angle can be achieved, which greatly reduces the difficulty of operation and installation;

[0024] (5) When the testing machine of the technical solution adopts a widened universal testing machine, it can be convenient to realize the irradiation of the sample in the environmental chamber by the left and right video extensometers without tilting the environmental chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the environmental box of the utility model;

[0026] Figure 2 This is a schematic diagram of the high and low temperature environment test mechanism structure of Example 1;

[0027] Figure 3 This is a schematic diagram of the high and low temperature environment test mechanism structure of Example 1;

[0028] Figure 4 This is a schematic diagram of the high and low temperature environment test mechanism structure of Example 1;

[0029] In the figure:

[0030] 10-environmental chamber, 100-front window, 101-left window, 102-right window, 103-chamber door, 104-fixture port;

[0031] 2-testing machine, 20-testing table, 21-column;

[0032] 3- Video Extensometer. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present utility model.

[0037] The high and low temperature environment testing mechanism of this embodiment includes an environmental chamber, a video extensometer and a testing machine, wherein the environmental chamber is installed between the sample clamping structure and the test bench of the testing machine, and the video extensometer is installed above the test bench of the testing machine and is located outside the environmental chamber.

[0038] The following is combined with Figure 1-4 , the high and low temperature environment test mechanism of the utility model is specifically described.

[0039] like Figure 1As shown, it is the environmental box 10 used in the embodiment of the utility model. The environmental box is a high and low temperature environmental box. The structure of the high and low temperature environmental box is roughly the same as that of the existing high and low temperature environmental box, and has a main body. The main body has an outer shell, and the outer shell is usually made of high-quality steel plate or stainless steel material, and has good strength and corrosion resistance. The surface of the outer shell is sprayed with anti-rust paint and decorative coating to effectively protect the box from erosion by the external environment; the outer shell is provided with an inner box, which is the core part of the high and low temperature environmental box and is in direct contact with the test sample. It is usually made of metal materials such as stainless steel or aluminum alloy, and has good thermal conductivity and corrosion resistance; in order to ensure the stability of the internal temperature of the environmental box and the energy-saving effect, high-efficiency thermal insulation materials, such as polyurethane foam materials, are filled between the inner box and the outer shell to reduce heat transfer and improve the energy efficiency ratio of the equipment. The shell is also equipped with a refrigeration system and a heating system. The refrigeration system is the key to the low temperature environment of the environmental box. It is mainly composed of components such as a compressor, a condenser, an expansion valve and an evaporator. Through the circulation of refrigerant in the system, the rapid cooling and temperature control inside the environmental box are realized; the heating system is responsible for providing a high temperature environment. It is usually composed of components such as electric heating elements, thermostats and temperature sensors. The electric heating elements are heated according to the instructions of the thermostat to make the internal temperature of the environmental box reach the set value; in addition, a control system is set on the shell to be responsible for the operation monitoring and parameter setting of the entire equipment. The control system is usually equipped with a microcomputer controller or a touch screen human-machine interface, which can easily perform temperature setting, time setting, curve recording and other operations. At the same time, the control system also has a variety of protection functions, such as overload protection, over-temperature protection, etc., to ensure the safe operation of the equipment. In order to ensure the uniformity and stability of the temperature inside the environmental box, it is usually equipped with an air circulation system. The system is mainly composed of components such as fans, air ducts and guide plates, and the uniform distribution of air and heat transfer inside the box are achieved through forced convection. The above results are the basic structure of the existing environmental chamber, which is the same as the environmental chamber of the present technical solution. Due to the prior art, no further detailed description is given here.

[0040] The difference between the environmental chamber 10 of the present technical solution and the existing environmental chamber is that the existing environmental chamber is usually only provided with a front window, while the environmental chamber 10 of the present solution is provided with a left window 101 and a right window 102 on at least the left and right sides in addition to the front window 100. Specifically, the environmental chamber 10 has a door 103, one side of the door 103 is connected to the box body of the environmental chamber 10, and the other side can be opened and closed. The sample is installed into the environmental chamber 10 through the door 103 for testing; a front window 100 is provided on the door 103, and a left window 101 and a right window 102 are provided on the main body on both sides of the door 103 to form an environmental chamber structure with three windows, the left window 101 and the right window 102 of the environmental chamber 10 are located in the b direction of the main body, and the front window 100 is located in the c direction of the main body, and the b direction is perpendicular to the c direction.

[0041] In addition, another difference between the environmental chamber 10 of the present scheme and the existing environmental chamber is that a clamp port 104 is also provided on the main body of the environmental chamber 10 of the present scheme, and the clamp port 104 is located in the a direction of the main body, and the a direction, the b direction and the c direction are perpendicular to each other; according to the clamping requirements of the sample in the actual test, the clamp port 104 can be set separately at the top of the environmental chamber 10, or it can be set at the top and bottom of the environmental chamber 10 at the same time, and the clamp device of the testing machine (not shown in the drawings) penetrates into the environmental chamber 10 from the clamp port 104 to clamp the sample for testing.

[0042] It should be noted that the three windows of the environmental box 10 are all made of optical glass with high light transmittance, and the optical glass adopts a three-layer structure to ensure good thermal insulation performance.

[0043] Example 1

[0044] Combination Figure 2 The figure shows the schematic structure of the high and low temperature environment test mechanism of the embodiment 1 of the present scheme, wherein the environmental box 10 adopts Figure 1 As shown in the structure, in this embodiment, the testing machine 20 adopts a conventional universal testing machine with symmetrically arranged columns 201, where the columns 201 are symmetrical relative to the left and right sides of the sample; the environmental box 10 is located above the test bench 200 of the testing machine 20, and the columns 201 are vertically installed on the test bench 200. The part of the environmental box 10 for testing, that is, the part with the inner box is located between the two columns 201 above the test bench 200; two video extensometers 30 are arranged above the test bench 200 at the same time, and the two video extensometers 30 are arranged outside the left window 101 and the right window 102 to track the deformation of the sample during the test, and the video extensometer 30 is always located on the same test straight line with the sample in the body of the environmental box 10, and the straight line extends along the direction b. At this time, the left window 101 and the right window 102 of the environmental box 10 are respectively located between the left and right columns 201 of the testing machine 20 and the test sample.

[0045] In order to avoid the column 201 from blocking the video extensometer 30 during the test, in this case, the video extensometer 30 is set on the side of the column 201, and the straight line where the two columns are located forms an angle α with the straight line where the two video extensometers are located, and the angle α is 0°≤α≤25°; at the same time, the environmental chamber 10 is tilted so that the test axis of the environmental chamber 10 along the c direction forms an angle β with the straight line where the two symmetrical columns of the testing machine are located, and the angle difference between β and α is 90°. In this way, the video extensometers 30 arranged on both sides are always tilted at a certain angle to realize the irradiation of the sample in the environmental chamber, thereby completing the tracking of the deformation, and effectively solving the problem of the testing machine columns blocking the left and right windows.

[0046] Example 2

[0047] Combination Figure 3 The figure shows the schematic structure of the high and low temperature environment test mechanism of Example 2 of this scheme, wherein the environmental box 10 adopts Figure 1 As shown in the structure, in this embodiment, the testing machine 20 adopts a universal testing machine with symmetrically arranged columns. The difference between the testing machine 20 here and the testing machine in Example 1 is that the universal testing machine in this embodiment adopts a widened setting, that is, the testing machine in this embodiment is larger than the universal testing machine in Example 1 in the width direction, thereby increasing the distance between the two columns 201 arranged in the width direction (the aforementioned left and right sides). Under the condition that the relative positions of the dual video extensometer 30 and the environmental chamber 10 remain unchanged, the widened distance between the columns 201 can make the video extensometer 30 be arranged between the columns and the left and right windows, that is, the three are located on the same test straight line, so that the left and right video extensometers can conveniently irradiate the samples in the environmental chamber without tilting the environmental chamber.

[0048] Example 3

[0049] Combination Figure 4 The figure shows the schematic structure of the high and low temperature environment test mechanism of Example 2 of this scheme, wherein the environmental box 10 adopts Figure 1 As shown in the structure, in this embodiment, the testing machine 20 adopts a testing machine with an asymmetrical arrangement of supporting special columns. The asymmetry of the columns here means that they are asymmetrical relative to the left and right sides of the sample. At this time, when the relative position of the dual video extensometer 30 and the environmental chamber 10 is the same as that in Example 1, the straight line where the two columns are located and the straight line where the two video extensometers are located form an angle α, and the angle α is 0°≤α≤25°. The video extensometer 30 is located on the side of the column 201, and the two columns 201 are located at the diagonal corners of the testing machine. The environmental chamber 10 and the testing machine 20 are set in the positive direction, that is, the b direction of the environmental chamber 10 is consistent with the width (the aforementioned left and right sides) of the testing machine 20. In this way, the irradiation of the sample can be easily realized without tilting the environmental chamber, and a more ideal irradiation angle can be achieved, which greatly reduces the difficulty of operation and installation.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. High and low temperature environment test mechanism, characterized in that: The invention comprises an environmental chamber, a video extensometer and a testing machine, wherein the environmental chamber is installed between a sample clamping structure and a test bench of the testing machine, and the video extensometer is installed above the test bench of the testing machine and is located outside the environmental chamber; wherein, The environmental chamber has a body and a viewing window and a fixture port arranged on the body, wherein the viewing window has at least two side viewing windows, and the fixture port is arranged on the body between the two side viewing windows, and the fixture device of the testing machine is used to clamp the sample from the fixture port for testing; At least two video extensometers are provided, which are respectively arranged outside the two side windows to track the deformation of the test sample during the test; The testing machine has columns, which are located at the windows on both sides of the environmental chamber, and a line connecting the two columns and a line connecting the two video extensometers form an angle.

2. The high and low temperature environment testing mechanism according to claim 1, characterized in that: The environmental chamber has a chamber door, and a front viewing window is also arranged on the chamber door, so as to form an environmental chamber structure with three viewing windows.

3. The high and low temperature environment testing mechanism according to claim 2, characterized in that: The two side windows of the environmental box are located in the b direction of the body, the front window is located in the c direction of the body, and the fixture port is located in the a direction of the body. The a direction, the b direction and the c direction are perpendicular to each other.

4. The high and low temperature environment testing mechanism according to claim 2, characterized in that: The three windows of the environmental chamber are all made of optical glass with high light transmittance, and the optical glass adopts a three-layer structure to ensure good thermal insulation performance.

5. The high and low temperature environment testing mechanism according to claim 2, characterized in that: The video extensometer is always located on the same testing straight line as the sample in the environmental chamber body, and the straight line extends along the b direction.

6. The high and low temperature environment testing mechanism according to claim 1, characterized in that: The angle α between the line connecting the two upright posts of the testing machine and the line connecting the two video extensometers is 0°≤α≤25°.

7. The high and low temperature environment testing mechanism according to claim 1, characterized in that: The testing machine is a universal testing machine with symmetrically arranged columns and / or a testing machine with asymmetrically arranged columns.

8. The high and low temperature environment testing mechanism according to claim 7, characterized in that: The testing machine is a universal testing machine with symmetrically arranged columns. The video extensometer is located on the side of the columns. The environmental chamber is inclined relative to the line between the two symmetrical columns of the testing machine. The inclination angle is β, and the angle difference between β and α is 90°.

9. The high and low temperature environment testing mechanism according to claim 7, characterized in that: The testing machine is a universal testing machine with symmetrically arranged columns. The testing machine is widened in width. The video extensometer is arranged between the column and the side window, and the three are located on the same test straight line.

10. The high and low temperature environment testing mechanism according to claim 7, characterized in that: The testing machine adopts an asymmetrically arranged column, the video extensometer is located on the side of the column, the two columns are located at the diagonal positions of the testing machine, and the environmental chamber and the testing machine are arranged in a positive direction.

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