Device capable of realizing non-contact measurement of high-temperature hole pressure-bearing test deformation process

Abstract

The utility model relates to the field of metal material pin type pressure-bearing tools, and discloses a device capable of realizing non-contact measurement of a high-temperature hole pressure-bearing test deformation process, which comprises an upper tool, a lower tool, a scale distance pin assembly and a scale distance clamp, a V-shaped groove is arranged at the inner bottom of the upper tool, a mounting groove I is arranged at the bottom of the upper tool, and a mounting groove II is arranged at the bottom of the lower tool. A first threaded connector is connected to the top of the upper tool, a scale distance pin assembly is installed at the position, close to the bottom, of the front portion of the upper tool, the scale distance pin assembly comprises a feature point marking plate and a second pin, the second pin is placed on the V-shaped groove, and the feature point marking plate is located at the position, close to the bottom, of the front portion of the upper tool and fixedly connected with one end of the second pin. By reasonably assembling the feature point marking plate, the upper tool and the lower tool and cooperating with the video extensometer, the occurrence of adverse factors such as test failure or equipment damage caused by deformation of a sample in the thickness direction of an existing device is avoided, and the test can be conveniently carried out in a high-temperature test environment.

Description

Technical Field

[0001] This utility model relates to the field of metal material pin-type pressure-bearing fixtures, specifically a device that can realize non-contact measurement of the deformation process of high-temperature hole pressure-bearing tests. Background Technology

[0002] ASTM E238 is a standard published by the American Society for Testing and Materials (ASTM). The schematic steps of the bearing deformation transfer device under this standard are as follows: First, prepare the sample as required and measure the relevant dimensions. Then, place the sample into the wedge fixture. Next, gradually apply the load at the standard rate. During this process, use an extensometer to measure the sample deformation and record the relationship between the pin load and the bearing deformation. Finally, calculate the bearing strength and bearing yield strength based on the test data.

[0003] The existing equipment has a cumbersome assembly process, a long sample loading time, and low work efficiency. In addition, during the test operation, the sample in the thickness direction that is in contact with the bearing pin may deform and expand. The deformed and expanded part will come into contact with the plunger tip in the deformation measuring device, which will cause the deformation measuring device to be subjected to lateral force, leading to test failure. At the same time, there is a risk of the deformation measuring device being crushed and damaged. When the test is carried out under high temperature conditions, the accuracy and precision of the dial gauge connected to the deformation measurement device are greatly affected by the high temperature, which cannot meet the test requirements. Utility Model Content

[0004] The purpose of this invention is to provide a device that can achieve non-contact measurement of the deformation process of high-temperature borehole pressure test, so as to solve the adverse factors such as test failure or equipment damage caused by the deformation of the sample thickness direction in the existing device, and to facilitate the test in a high-temperature environment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for non-contact measurement of deformation process in high-temperature borehole pressure test, comprising an upper fixture, a lower fixture, a gauge pin assembly, and a gauge clamp. The upper fixture has a V-groove at its bottom, an installation groove at its bottom, and a threaded connector at its top.

[0006] Preferably, a gauge pin assembly is installed at the bottom front of the upper tooling. The gauge pin assembly includes a feature point marking plate and a second pin. The second pin is placed on a V-groove, and the feature point marking plate is located at the bottom front of the upper tooling and is fixedly connected to one end of the second pin.

[0007] Preferably, a gauge clip is installed at the bottom of the upper tooling. The gauge clip has a slot that extends through the top and bottom. The gauge clip has a threaded hole that passes through the slot. The top of the gauge clip is adaptively matched with the mounting slot.

[0008] Preferably, the lower tooling has an internal mounting groove, a pin hole through the mounting groove, and a threaded connector is connected to the bottom of the lower tooling.

[0009] Preferably, a pin is inserted into the interior of the mounting groove 2 through the pin hole, and the mounting groove 2 fixes the pressure-bearing sample with the hole by inserting the pin.

[0010] Preferably, the top of the gauge clip is adapted to the mounting groove, and the pin is placed on the V-groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1) The entire test process can achieve non-contact measurement of pin hole deformation. The assembly process is simple, fast and efficient, avoiding adverse factors such as test failure or equipment damage caused by sample thickness deformation. It is also convenient to conduct the test in a high temperature environment.

[0013] 2) It can be used with an environmental chamber and video extensometer to complete high-temperature borehole pressure test. The optimized tooling avoids measurement errors caused by deformation in the thickness direction of the sample. The optimized tooling is easier to assemble, effectively saving sample loading and changing time and improving work efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a device for non-contact measurement of deformation process in high-temperature borehole pressure test according to an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the upper tooling structure in an embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the standard distance pin assembly structure in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram of the gauge clip structure in an embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of the lower tooling structure in an embodiment of the present invention.

[0019] In the diagram: 1. Upper fixture; 2. Gauge pin assembly; 3. Gauge clamp; 4. Hole bearing sample; 5. Pin one; 6. Lower fixture; 7. Threaded connector one; 8. V-groove; 9. Mounting groove one; 10. Mounting groove two; 11. Pin hole; 12. Threaded connector two; 13. Threaded hole; 14. Slot; 15. Feature point marking plate; 16. Pin two. 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 1

[0022] Combination Figure 1 - Figure 5 A device for non-contact measurement of deformation process in high-temperature borehole pressure test includes an upper fixture 1, a lower fixture 6, a gauge pin assembly 2, and a gauge clamp 3. The upper fixture 1 has a V-groove 8 at the bottom and an installation groove 9 at the bottom. The upper fixture 1 is connected to a threaded joint 7 at the top.

[0023] A gauge pin assembly 2 is installed at the bottom front of the upper fixture 1. The gauge pin assembly 2 includes a feature point marking plate 15 and a second pin 16. The second pin 16 is placed on the V-groove 8. The feature point marking plate 15 is located at the bottom front of the upper fixture 1 and is fixedly connected to one end of the second pin 16.

[0024] The bottom of the upper tooling 1 is equipped with a gauge clip 3. The inside of the gauge clip 3 has a slot 14 that runs through the top and bottom. The gauge clip 3 has a threaded hole 13 that passes through the slot 14. The top of the gauge clip 3 is compatible with the mounting slot 9.

[0025] The lower tooling 6 has an internal mounting groove 10, and a pin hole 11 is provided through the mounting groove 10. The bottom of the lower tooling 6 is connected to a threaded connector 12.

[0026] The pin hole 11 penetrates the interior of the mounting groove 2 10, and a pin 5 can be inserted therein. The mounting groove 2 10 fixes the bore pressure-bearing sample 4 by inserting the pin 5.

[0027] The top of the gauge clip 3 is adapted to the mounting slot 9, and the pin 16 is placed on the V-groove 8.

[0028] In actual operation, the specific steps are as follows:

[0029] (1) Connect the upper tooling 1 and the lower tooling 6 to the external upper loading rod and the external lower loading rod respectively through threaded joint 17 and threaded joint 212, so that the upper tooling 1 and the lower tooling 6 are tightly connected to the external upper loading rod and the external lower loading rod.

[0030] (2) Spray high-temperature resistant black paint on the surface of feature point marking plate 15 and gauge length clamp 3, and then use high-temperature resistant white paint pen to mark the gauge length on feature point marking plate 15 and gauge length clamp 3 respectively, as the feature points for video extensometer identification; or spray high-temperature resistant white paint on the surface of feature point marking plate 15 and gauge length clamp 3, and then use high-temperature resistant black paint to spray speckle on feature point marking plate 15 and gauge length clamp 3, as the feature points for video extensometer identification;

[0031] (3) When installing the bore pressure sample 4, the sample passes through the mounting groove 9, and the pin 16 passes through the pin hole on the sample and is placed on the V groove 8 for fixation. The other end of the bore pressure sample 4 is fixed inside the mounting groove 2 of the lower tooling 6 with the pin 5, and the bore pressure sample 4 is adjusted to be coaxial.

[0032] (4) Apply initial force to tighten the external upper and lower loading rods, clamp the gauge clamp 3 onto the bore pressure sample 4 and fix it with screws;

[0033] (5) Adjust the position of the video extensometer to accurately identify the gauge feature points on the feature point marker plate 15 and the gauge feature points on the gauge clamp 3, so as to detect the deformation of the sample during the test.

[0034] (6) The entire test process can achieve non-contact measurement of pin hole deformation. The assembly process is simple, fast and efficient, avoiding adverse factors such as test failure or equipment damage caused by sample thickness deformation. It is also convenient to conduct the test in a high temperature environment.

[0035] 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 the 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 device for non-contact measurement of deformation process in high-temperature borehole pressure test, comprising an upper fixture (1), a lower fixture (6), a gauge pin assembly (2), and a gauge clamp (3), characterized in that: The upper tooling (1) has a V-groove (8) at the bottom inside, an installation groove (9) at the bottom of the upper tooling (1), and a threaded connector (7) at the top of the upper tooling (1). The upper tooling (1) is equipped with a gauge pin assembly (2) at the bottom front. The gauge pin assembly (2) includes a feature point marking plate (15) and a second pin (16). The second pin (16) is placed on a V-groove (8). The feature point marking plate (15) is located at the bottom front of the upper tooling (1) and is fixedly connected to one end of the second pin (16). The bottom of the upper tooling (1) is equipped with a gauge clip (3). The gauge clip (3) has a slot (14) through the top and bottom. The gauge clip (3) has a threaded hole (13) through the slot (14). The top of the gauge clip (3) is compatible with the mounting groove (9). The lower tooling (6) has an internal mounting groove (10), and the lower tooling (6) has a pin hole (11) through the mounting groove (10). The bottom of the lower tooling (6) is connected to a threaded connector (12).

2. The device for non-contact measurement of deformation process in high-temperature borehole pressure test according to claim 1, characterized in that: The pin hole (11) penetrates the interior of the mounting groove two (10) and a pin one (5) can be inserted therein. The mounting groove two (10) fixes the perforated pressure-bearing sample (4) by inserting the pin one (5).

3. The device of claim 1, wherein: The top of the gauge clip (3) is adapted to the mounting groove (9), and the pin (16) is placed on the V-groove (8).

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