Full-field strain test equipment for small sample in high-temperature environment

Abstract

The utility model discloses full-field strain test equipment for a small sample in a high-temperature environment, which relates to the field of static tensile property detection of metal materials and comprises an equipment base, a loading system, a circulating cooling system and a high-temperature environment system are mounted on the equipment base, the loading system comprises a cross beam and two high-temperature pull rods, and the cross beam is connected with the circulating cooling system. The cross beam is installed on the equipment base through a precise lead screw, the two high-temperature pull rods are connected with the cross beam and the equipment base respectively, a coaxiality adjusting assembly is installed between the high-temperature pull rod located at the bottom end and the equipment base, and the circulating cooling system is connected with the high-temperature pull rods through high-temperature-resistant hoses. The high-temperature environment system comprises a high-temperature furnace bracket; the high-temperature furnace bracket is fixedly mounted at the top of the equipment base; the test equipment can accurately measure the tiny deformation of the working section of the sample in a non-contact manner, reduce the influence of the additional acting force of the contact extensometer on the stretching process of the small sample, more intuitively observe the deformation condition of the sample in the stretching process, and monitor the deformation of the sample under a high-temperature condition.

Description

Technical Field

[0001] The utility model relates to the field of static tensile property detection of metal materials, and particularly relates to a full-field strain test device for small specimens in a high-temperature environment. Background Art

[0002] In the research and production of materials, for the testing of complex structure samples and samples in service, it is not easy to take samples of conventional standard size samples, and sampling is likely to damage the samples, which is not conducive to test operations, etc., thus increasing the test difficulty. There are also some problems in the research on the testing of small-size specimens, that is, the requirements for test accuracy are relatively high, and existing equipment and test methods are difficult to meet the test requirements. It is necessary to develop new test equipment or improve the performance of existing equipment, and establish appropriate test methods to ensure the reliability of test data. This solution specifically relates to a full-field strain test device for small specimens in a high-temperature environment;

[0003] When the full-field strain test device for small specimens in a high-temperature environment is in use, the traditional contact high-temperature extensometer is subjected to additional forces, which affects the test accuracy, cannot meet the strain measurement requirements in a high-temperature environment, cannot accurately measure the small deformation of the working section of the small specimen, and the coaxiality cannot be accurately adjusted. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a full-field strain test device for small specimens in a high-temperature environment, which can effectively solve the technical problems in the background art that "the additional force of the traditional contact high-temperature extensometer affects the test accuracy, cannot meet the strain measurement requirements in a high-temperature environment, cannot accurately measure the small deformation of the working section of the small specimen, and the coaxiality cannot be accurately adjusted".

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A full-field strain test device for small specimens in a high-temperature environment includes an equipment base, on which a loading system, a circulating cooling system, and a high-temperature environment system are installed. The loading system includes a cross beam and two high-temperature tie rods. The cross beam is installed on the top of the equipment base through a precision lead screw. The two high-temperature tie rods are respectively connected to the cross beam and the equipment base. A coaxiality adjustment component is installed between the high-temperature tie rod at the bottom and the equipment base. The circulating cooling system is connected to the high-temperature tie rod through a high-temperature resistant hose. The high-temperature environment system includes a high-temperature furnace support, which is fixedly installed on the equipment base. A high-temperature furnace body is installed on the top of the high-temperature furnace support. Two thermocouples are inserted through the rear part of the high-temperature furnace body. A high-temperature resistant glass is installed at the front part of the high-temperature furnace body.

[0007] As a further solution of the utility model, the two high-temperature tie rods are symmetrically installed up and down, and a specimen is installed between the two high-temperature tie rods.

[0008] As a further solution of the utility model, the high-temperature pull rod at the upper end is connected and fixed to the bottom of the beam, and the high-temperature pull rod at the lower end is connected to the equipment base by a pin and fixed with a locking ring.

[0009] As a further solution of the utility model, the high-temperature furnace body is located outside the two high-temperature pull rods, and two thermocouples are plugged into the rear of the high-temperature furnace body and fixed by bolts.

[0010] As a further solution of the utility model, a vertical pole is installed on the top of the equipment base, a deformation measurement system is installed on the outside of the vertical pole, the deformation measurement system includes a support frame and a locking assembly, the support frame is fixedly installed on the outside of the vertical pole, the locking assembly is installed on the top of the support frame, a slide rail is movably installed on the outside of the support frame, a leveling assembly is installed on the top of the slide rail, a video extensometer is installed on the top of the leveling assembly, and a group of fill green lights are installed on one side of the video extensometer.

[0011] As a further solution of the utility model, the video extensometer is movably rotatably arranged outside the vertical pole through a support frame, and the video extensometer is slidably arranged back and forth through a slide rail.

[0012] The beneficial effects of the utility model are as follows:

[0013] By setting up the loading system and the high-temperature environment system, the sample is installed between two high-temperature tie rods, the coaxiality adjustment component adjusts the coaxiality of the high-temperature tie rod, and the high-temperature tie rod is cooled by the circulating cooling water in the circulating cooling system. The small deformation of the working section of the sample is accurately measured. It is suitable for parallel sections with a length of less than 10mm to improve the precise adjustment of coaxiality. The height and front and rear position of the high-temperature furnace body are adjusted by the high-temperature furnace bracket. It can meet the strain measurement requirements in high-temperature environments and reduce the additional force of the high-temperature extensometer that affects the accuracy of the test;

[0014] By setting up the deformation measurement system, the video extensometer lens is aimed at the observation window of the high-temperature furnace body, and the video extensometer is adjusted back and forth by the slide rail, which facilitates the adjustment of the position of the video extensometer. The sample can be clearly displayed in the field of view, and the full-field strain measurement can be achieved. The deformation of the sample under high temperature conditions can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a full-field strain testing device for small specimens in a high-temperature environment according to the utility model;

[0016] Figure 2 This is a side view of a loading system in a full-field strain testing device for a small sample in a high-temperature environment according to the utility model;

[0017] Figure 3Side view of the high-temperature environment system in a full-field strain testing device for small specimens in a high-temperature environment according to the present utility model;

[0018] Figure 4 Rear view of the deformation measurement system in a full-field strain testing device for small specimens in a high-temperature environment according to the present utility model.

[0019] In the figure: 1. Loading system; 2. Circulating cooling system; 3. High-temperature environment system; 4. Deformation measurement system; 5. Upright pole; 11. Cross beam; 12. High-temperature pull rod; 13. Equipment base; 14. Coaxiality adjustment component; 31. High-temperature furnace body; 32. Thermocouple; 33. High-temperature resistant glass; 34. High-temperature furnace support; 41. Video extensometer; 42. Support frame; 43. Supplementary light green lamp; 44. Slide rail; 45. Leveling component; 46. Locking component. Specific embodiments

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] As Figures 1-4 shown, a full-field strain testing device for small specimens in a high-temperature environment includes an equipment base 13. A loading system 1, a circulating cooling system 2, and a high-temperature environment system 3 are installed on the top of the equipment base 13. The loading system 1 includes a cross beam 11 and two high-temperature pull rods 12. The cross beam 11 is installed on the top of the equipment base 13 through a precision lead screw. The two high-temperature pull rods 12 are respectively connected to the cross beam 11 and the equipment base 13. A coaxiality adjustment component 14 is installed between the high-temperature pull rod 12 at the bottom end and the equipment base 13. The circulating cooling system 2 is connected to the high-temperature pull rod 12 through a high-temperature resistant hose. The high-temperature environment system 3 includes a high-temperature furnace support 34. The high-temperature furnace support 34 is fixedly installed on the top of the equipment base 13. A high-temperature furnace body 31 is installed on the top of the high-temperature furnace support 34. Two thermocouples 32 are inserted through the rear part of the high-temperature furnace body 31. A high-temperature resistant glass 33 is installed at the front part of the high-temperature furnace body 31.

[0022] In this embodiment, the two high-temperature pull rods 12 are symmetrically installed up and down. A specimen is installed between the two high-temperature pull rods 12. By installing the specimen between the two high-temperature pull rods 12, the coaxiality adjustment component 14 passes through both ends of the loading rod, and a pin is used to fix the adjustment component and the pull rod to ensure good coaxiality. Then, the locking ring fixes the loading rod to complete the coaxiality adjustment.

[0023] In this embodiment, the high-temperature tie rod 12 at the upper end is fixedly connected to the bottom of the cross beam 11, and the high-temperature tie rod 12 at the lower end is pin-connected to the equipment base 13. The two high-temperature tie rods 12 are respectively fixed to the locking rings connected to the cross beam 11 and the equipment base 13, and the coaxiality of the high-temperature tie rod 12 is adjusted by the coaxiality adjustment assembly 14.

[0024] In this embodiment, the high-temperature furnace body 31 is located outside the two high-temperature tie rods 12. The two thermocouples 32 are inserted into the rear part of the high-temperature furnace body 31 and fixed by bolts. The high-temperature furnace support 34 is used to adjust the height and front-back position of the high-temperature furnace body 31. The high-temperature resistant glass 33 is located in the front part of the high-temperature furnace body 31 for monitoring the deformation of the specimen in the high-temperature furnace body 31.

[0025] In this embodiment, a vertical rod 5 is installed on the top of the equipment base 13, and a deformation measurement system 4 is installed outside the vertical rod 5. The deformation measurement system 4 includes a support frame 42 and a locking assembly 46. The support frame 42 is fixedly installed outside the vertical rod 5, and the locking assembly 46 is installed on the top of the support frame 42. A slide rail 44 is movably installed outside the support frame 42, a leveling assembly 45 is installed on the top of the slide rail 44, a video extensometer 41 is installed on the top of the leveling assembly 45, and a group of supplementary light green lights 43 are installed on one side of the video extensometer 41. The lens of the video extensometer 41 is aligned with the observation window of the high-temperature furnace body 31, and the monitoring is carried out through the high-temperature resistant glass 33 in the front observation window of the high-temperature furnace body 31.

[0026] In this embodiment, the video extensometer 41 is rotatably arranged outside the vertical rod 5 through the support frame 42, and the video extensometer 41 is slidably arranged back and forth through the slide rail 44. The video extensometer 41 is adjusted by rotating the support frame 42, and the locking assembly 46 is used to fix the adjusted position.

[0027] It should be noted that the present utility model is a full-field strain testing device for small specimens in a high-temperature environment. When in use, the specimen is installed between two high-temperature tie rods 12. The coaxiality adjustment assembly 14 is in a tight fit with the integral forming tooling through a sleeve. During operation, the sleeve is connected to the upper and lower loading rods and fixed with a pin. The loading rods are fixed by the locking rings at both ends of the loading rods to complete the coaxiality adjustment of the high-temperature tie rods 12. The circulating cooling system 2 is connected to the high-temperature tie rods 12 through heat-resistant hoses and has circulating cooling water inside. The high-temperature tie rods 12 are cooled by the circulating cooling water inside. When performing high-temperature tests, the height and front-back position of the high-temperature furnace body 31 are adjusted through the high-temperature furnace support 34. During the heating process of the high-temperature furnace body 31, the temperature inside the high-temperature furnace body 31 is measured by the thermocouple 32. When monitoring the deformation of the specimen, the video extensometer 41 is rotated through the support frame 42, the leveling assembly 45 levels the video extensometer 41, and the position of the video extensometer 41 is adjusted through the slide rail 44 so that the lens of the video extensometer 41 is aligned with the observation window at the heat-resistant glass 33 of the high-temperature furnace body 31, enabling the specimen to be clearly displayed in the field of view. Subsequently, the tensile program is executed to monitor the deformation of the working section of the specimen throughout the process.

[0028] The present utility model is provided with a loading system 1 and a high-temperature environment system 3. The specimen is installed between two high-temperature tie rods 12. The coaxiality adjustment assembly 14 adjusts the coaxiality of the high-temperature tie rods 12. The high-temperature tie rods 12 are cooled by the circulating cooling water in the circulating cooling system 2 to accurately measure the minute deformation of the working section of the specimen. It is applicable to specimens with a parallel section length of less than 10 mm, improving the precise adjustment of coaxiality. The height and front-back position of the high-temperature furnace body 31 are adjusted through the high-temperature furnace support 34, capable of meeting the strain measurement requirements in a high-temperature environment and reducing the influence of additional forces on the accuracy of the test by the high-temperature extensometer. By setting the deformation measurement system 4, the lens of the video extensometer 41 is aligned with the observation window of the high-temperature furnace body 31, and the video extensometer 41 is adjusted back and forth through the slide rail 44, facilitating the adjustment of the position of the video extensometer 41, enabling the specimen to be clearly displayed in the field of view, realizing full-field strain measurement, and capable of measuring the deformation of the specimen under high-temperature conditions.

[0029] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A full-field strain test device for a small sample in a high-temperature environment, comprising a device base (13), wherein the device base (13) is equipped with a loading system (1), a circulating cooling system (2), and a high-temperature environment system (3), and wherein: The loading system (1) comprises a crossbeam (11) and two high-temperature pull rods (12), wherein the crossbeam (11) is mounted on a device base (13) via a precision screw, wherein the two high-temperature pull rods (12) are respectively connected to the crossbeam (11) and the device base (13), wherein a coaxiality adjustment assembly (14) is installed between the high-temperature pull rod (12) at the bottom and the device base (13), wherein the circulating cooling system (2) is connected to the high-temperature pull rod (12) via a high-temperature resistant hose, wherein the high-temperature environment system (3) comprises a high-temperature furnace bracket (34), wherein the high-temperature furnace bracket (34) is fixedly mounted on the top of the device base (13), wherein a high-temperature furnace body (31) is mounted on the high-temperature furnace bracket (34), wherein two thermocouples (32) are inserted through the rear of the high-temperature furnace body (31), and wherein a high-temperature resistant glass (33) is installed at the front of the high-temperature furnace body (31).

2. The full-field strain testing device for small specimens in high temperature environments according to claim 1 is characterized in that: The two high-temperature pull rods (12) are installed symmetrically up and down, and a small sample is installed between the two high-temperature pull rods (12).

3. The full-field strain testing device for small specimens in high temperature environments according to claim 1 is characterized in that: The high-temperature pull rod (12) at the upper end is connected and fixed to the bottom of the cross beam (11), and the high-temperature pull rod (12) at the lower end is connected to the equipment base (13) by pin type and fixed by a locking ring.

4. The full-field strain testing device for small specimens in high temperature environments according to claim 1 is characterized in that: The high-temperature furnace body (31) is located outside the two high-temperature pull rods (12), and the two thermocouples (32) are plugged into the rear of the high-temperature furnace body (31) and fixed in position by bolts.

5. The full-field strain testing device for small specimens in high temperature environments according to claim 1 is characterized in that: A vertical pole (5) is installed on the top of the equipment base (13), and a deformation measurement system (4) is installed on the outside of the vertical pole (5). The deformation measurement system (4) comprises a support frame (42) and a locking assembly (46). The support frame (42) is fixedly installed on the outside of the vertical pole (5), and the locking assembly (46) is installed on the top of the support frame (42). A slide rail (44) is movably installed on the outside of the support frame (42), and a leveling assembly (45) is installed on the top of the slide rail (44). A video extensometer (41) is installed on the top of the leveling assembly (45), and a group of fill-in green lights (43) are installed on one side of the video extensometer (41).

6. The full-field strain testing device for small specimens in high temperature environments according to claim 5 is characterized in that: The video extensometer (41) is arranged to be movable and rotatable outside the vertical pole (5) via a support frame (42), and the video extensometer (41) is arranged to slide forward and backward via a slide rail (44).

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