A tooling sling for stress corrosion testing

Abstract

The utility model relates to material performance detection test technical field, concretely relates to a tooling lifting appliance for stress corrosion test, for suspending test tooling in test container, include: two supports, with the opposite mode fixed on the inner wall of test container and distance test container bottom surface certain height, every support includes the mounting portion for with test container inner wall connection, the support forms the vertical positioning groove on its upper end. The utility model through setting up support in the inner wall of test container, the interlocking fixed between support and crossbeam, and between crossbeam and test tooling, connect through the tooling connecting structure that constitutes by sliding seat and connecting assembly, after test, put net solution directly dismounts crossbeam from support, can disposablely smoothly take out together with test tooling, can effectively eliminate the shaking brought by the rope, when taking out test tooling, natural vertical stability, not easy to sway and knock the inner wall of test container.

Description

Technical Field

[0001] This utility model relates to the field of material performance testing technology, and in particular to a tooling lifting device for stress corrosion resistance testing. Background Technology

[0002] Sulfide stress corrosion cracking is a failure phenomenon caused by the combined effects of a wet hydrogen sulfide environment, tensile stress, and sensitive materials. In sulfide stress corrosion cracking tests, the four-point bending method is a common laboratory test method. By applying a constant and uniform bending stress to the material sample through a test fixture, the material's ability to resist SSC can be evaluated and quantified. It is one of the important tools for studying the SSC susceptibility of materials and screening SSC-resistant materials.

[0003] Currently, existing technologies generally use non-metallic hanging ropes to suspend the test fixture. The specific steps are as follows: First, the sample is placed in the test fixture, and stress is applied to the sample through the test fixture. The test fixture is then tied to a non-metallic support using a flexible non-metallic rope (such as PTFE fiber rope). The opening of the test container is sealed with a cap, and the test solution is introduced, so that the test fixture is immersed in a corrosive solution containing hydrogen sulfide. When it is necessary to remove the fixture after the test, the solution is drained, the non-metallic support is removed, the non-metallic rope is cut, and the test fixture is removed to observe the sample.

[0004] However, the lifting scheme has the following drawbacks: the flexible rope causes the tooling to swing under the flow of solution or vibration of equipment, which causes the sample to collide with the inner wall of the container (especially in the narrow space of the experimental container with a diameter ≤300mm), interfering with the accuracy of stress loading. Therefore, there is an urgent need for a lifting scheme that is both stable in positioning and corrosion-resistant and reliable to replace the traditional rope structure. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a tooling lifting device for stress corrosion resistance testing in order to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides a tooling lifting device for stress corrosion resistance testing, used to suspend the test tooling in a test container, comprising: Two brackets are fixedly mounted on the inner wall of the test container in an opposing manner and at a certain height from the bottom surface of the test container. Each bracket includes a mounting part for connecting with the inner wall of the test container, and a vertical positioning groove is formed at its upper end. A crossbeam, the shape of which at both ends is adapted to the inner contour of the positioning groove, is suspended between two supports by inserting the ends of the crossbeam into the positioning groove. The tooling connection structure includes a sliding seat that is slidably sleeved on the crossbeam, and a connecting assembly that connects the sliding seat and the test tooling.

[0007] As a preferred technical solution of this utility model, the mounting part is a mounting plate that is fixedly connected to the bracket. The mounting plate has an arc-shaped surface on one side that fits against the inner wall of the test container. The surface of the mounting plate is provided with a fixing hole, and a fixing member is inserted through the fixing hole. The other end of the fixing member is screwed into a fixing groove opened in the inner wall of the test container.

[0008] As a preferred technical solution of this utility model, the crossbeam is provided with limiting rods on both sides, and the bracket is provided with slots with connecting positioning grooves on both sides. The slots are "L" shaped. The limiting rods can move along the slots from the first position to the second position to lock, so as to longitudinally limit the crossbeam on the bracket.

[0009] As a preferred technical solution of this utility model, the crossbeam has a plurality of first mounting holes spaced apart on its side along its length direction, the sliding seat has a second mounting hole corresponding to the first mounting holes on its side, a first bolt for passing through the second mounting hole and the first mounting hole is provided, and a first nut is provided at the tail end of the first bolt.

[0010] As a preferred embodiment of this utility model, the connecting component includes: The second bolt and the second nut adapted to the second bolt, the sliding seat forming two spaced ends at its lower end, the ends having a third mounting hole for the second bolt to pass through, and the shank of the second bolt having a through groove. A screw, one end of which passes through the through groove; A limiting nut, which is threadedly connected to the screw; The first lifting ring is located at the lower end of the screw; The suspension mechanism has one end connected to the first lifting ring and the other end connected to the test fixture.

[0011] As a preferred embodiment of this utility model, the suspension mechanism is a hook with one end fixed to the test fixture, and the other end of the hook is detachably connected to the first lifting ring.

[0012] As a preferred embodiment of this utility model, the suspension mechanism includes: A U-shaped connector is movably connected to the first lifting ring, and second lifting rings are provided at both ends of the U-shaped connector; The lifting head has a through hole at its upper end; The third bolt passes through the through hole and connects to the second lifting ring; The third nut is threadedly connected to the third bolt, the lifting head has a fourth mounting hole at its lower end, and the surface of the test fixture has a fifth mounting hole corresponding to the fourth mounting hole; The fourth bolt is used to pass through the fifth mounting hole connected to the fourth mounting hole.

[0013] As a preferred embodiment of this utility model, the lifting device is made of a material resistant to hydrogen sulfide corrosion.

[0014] The beneficial effects of this utility model are as follows: By setting a support in the inner wall of the test container, the support is locked and fixed to the crossbeam, and the crossbeam is connected to the test fixture by a fixture connection structure consisting of a sliding seat and a connecting component. After the test, the solution is drained and the crossbeam is directly disassembled from the support, and the test fixture can be lifted out smoothly in one go. This effectively eliminates the shaking caused by the rope, and the test fixture is naturally vertical and stable when lifted out, making it less likely to sway and bump into the inner wall of the test container, thus increasing safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the bracket and crossbeam of this utility model; Figure 4 This is a three-dimensional structural diagram of the second embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the lifting head and testing fixture of this utility model; Figure 6 This is a three-dimensional structural diagram of the first embodiment of the present invention.

[0017] The markings in the diagram are as follows: 1. Test container; 2. Cover; 3. Test fixture; 4. Mounting plate; 5. Bracket; 6. Groove; 7. Crossbeam; 8. Limiting rod; 9. First mounting hole; 10. Sliding seat; 11. Second mounting hole; 12. First bolt; 13. First nut; 14. Second bolt; 15. Third mounting hole; 16. Second nut; 17. Screw; 18. Through groove; 19. Limiting nut; 20. First lifting ring; 21. U-shaped connector; 22. Second lifting ring; 23. Lifting head; 24. Through hole; 25. Third bolt; 26. Third nut; 27. Fourth bolt; 28. Fourth mounting hole; 29. ​​Fifth mounting hole; 30. Hook. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a fixture for stress corrosion testing, used to suspend a test fixture 3 in a test container 1, includes: two supports 5, fixedly mounted on the inner wall of the test container 1 in an opposing manner and at a certain height above the bottom surface of the test container 1, each support 5 including a mounting part for connecting with the inner wall of the test container 1, and a vertical positioning groove formed at the upper end of the support 5; a crossbeam 7, the shape of which at both ends is adapted to the inner contour of the positioning groove, and the crossbeam 7 is suspended between the two supports 5 by embedding the ends of the crossbeam 7 into the positioning groove; and a fixture connection structure, which includes a sliding seat 10 slidably sleeved on the crossbeam 7, and a connecting assembly connecting the sliding seat 10 and the test fixture 3. The above technical solution enables the test fixture 3 to be stably suspended in the test container 1. By setting a support 5 in the inner wall of the test container 1, the support 5 can be integrally formed with the test container 1, or the two can be connected by a fixed method. At the same time, a positioning groove is opened on the support 5, which can quickly position and disassemble the crossbeam 7. After draining the solution, the crossbeam 7 can be directly pulled out from the support 5, and the test fixture 3 can be lifted out smoothly in one go. Then, the sliding seat 10 slides out from one end of the crossbeam 7, and the test fixture 3 can be disassembled. The support 5 is left in the test container 1 for continued use without disassembly. Due to the use of a rigid structure, the swaying caused by the rope can be effectively eliminated. When lifting the test fixture 3, it is naturally vertical and stable, and it is not easy to swing and hit the inner wall of the test container 1, which increases safety.

[0021] like Figure 2 and Figure 3 As shown, in this embodiment, the mounting part is a mounting plate 4 that is fixedly connected to the bracket 5. The mounting plate 4 has an arc-shaped surface on one side that fits against the inner wall of the test container 1. The surface of the mounting plate 4 is provided with a fixing hole, and a fixing member is inserted through the fixing hole. The other end of the fixing member is screwed into a fixing groove opened in the inner wall of the test container 1. The above technical solution can fix the bracket 5 to the inner wall of the test container 1, thereby providing sufficient support for the crossbeam 7.

[0022] like Figure 3 As shown, in this embodiment, limit rods 8 are provided on both sides of the crossbeam 7, and the bracket 5 has grooves 6 with connecting positioning grooves on its two sides. The grooves 6 have an "L" shape structure. The limit rods 8 can move from the first position to the second position along the grooves 6 to lock, so as to longitudinally limit the crossbeam 7 on the bracket 5. The above technical solution ensures that the crossbeam 7 will not easily detach from the bracket 5, making the connection between the two more reliable.

[0023] like Figure 4 and Figure 5 As shown, in this embodiment, the crossbeam 7 has a plurality of first mounting holes 9 spaced apart on its side along its length direction, and the sliding seat 10 has a second mounting hole 11 corresponding to the first mounting holes 9 on its side. A first bolt 12 for passing through the second mounting hole 11 and the first mounting hole 9 is provided between the second mounting hole 11 and the first mounting hole 9, and a first nut 13 is provided at the tail end of the first bolt 12. The above technical solution can process multiple samples at once, improving the efficiency of the test and shortening the test cycle.

[0024] like Figure 4 or Figure 6 As shown, in this embodiment, the connecting assembly includes: a second bolt 14 and a second nut 16 adapted to the second bolt 14; a sliding seat 10 having two spaced-apart ends at its lower end, with a third mounting hole 15 for the second bolt 14 to pass through at each end; a through groove 18 on the shank of the second bolt 14; a screw 17, one end of which passes through the through groove 18; a limiting nut 19, which is threadedly connected to the screw 17; a first lifting ring 20, which is disposed at the lower end of the screw 17; and a suspension mechanism, one end of which is connected to the first lifting ring 20, and the other end of which is connected to the test fixture 3. The above technical solution allows for adjustment of the height of the test fixture 3 as needed. In use, the limiting nut 19 is rotated along the screw 17. When the limiting nut 19 moves upward relative to the screw 17, the test fixture 3 can be moved downward. Conversely, when the limiting nut 19 moves downward relative to the screw 17, the test fixture 3 can be moved upward. Thus, the height of the test fixture 3 can be adjusted according to the depth of the solution to ensure that the sample is fully immersed in the solution.

[0025] like Figure 6 As shown, in this embodiment, the suspension mechanism is a hook 30 with one end fixed to the test fixture 3, and the other end of the hook 30 is detachably connected to the first lifting ring 20; The above technical solution allows for convenient and quick disassembly of the test fixture 3. When it is necessary to disassemble the test fixture 3, the hook 30 at its upper end can be pulled out from the first lifting ring 20 to separate the hook 30 from the first lifting ring 20, thereby allowing the test fixture 3, which is integrated with the hook 30, to be disassembled.

[0026] like Figure 4 and Figure 5 As shown, in this embodiment, the suspension mechanism includes: a U-shaped connector 21, which is movably connected to the first lifting ring 20, and the two ends of the U-shaped connector 21 are provided with second lifting rings 22; a lifting head 23, which has a through hole 24 at its upper end; a third bolt 25, which passes through and connects the through hole 24 and the second lifting ring 22; a third nut 26, which is threadedly connected to the third bolt 25; the lifting head 23 has a fourth mounting hole 28 at its lower end; the surface of the test fixture 3 has a fifth mounting hole 29 corresponding to the fourth mounting hole 28; and a fourth bolt 27, which is used to pass through and connect the fifth mounting hole 29 of the fourth mounting hole 28. The above technical solution allows for a different structure to connect the test fixture 3 to the first lifting ring 20. Compared to the first suspension mechanism mentioned above, the second suspension mechanism is more complex. Specifically, it uses a U-shaped connector 21, which is movably connected to the first lifting ring 20. The U-shaped connector 21 itself is also rotatably connected to the lifting head 23 via a third bolt 25. The lifting head 23 is fixed to the test fixture 3, providing two degrees of freedom of rotation, which can simulate the high degree of freedom of a rope. At the same time, compared to a rope, the structure has higher strength and is less prone to breakage.

[0027] Furthermore, in this embodiment, the lifting device is made of a material resistant to hydrogen sulfide corrosion, such as aluminum alloy or stainless steel. The dense oxide film naturally formed on the surface of aluminum alloy has good corrosion resistance in general environments, can block the penetration of moisture and oxygen, and is also lighter in weight. The above technical solution can improve the service life of the lifting equipment.

[0028] Working principle: Taking the first embodiment as an example, refer to the appendix. Figure 6 In use, first, mount the sliding seat 10 onto the crossbeam 7. Decide whether to use the first bolt 12 for locking as needed; it's fine if not locked. Then, insert the hook 30 of the test fixture 3 with the sample into the first lifting ring 20, referring to the attached... Figure 2Taking three sets of samples as an example, the other two test fixtures 3 are also installed on the first lifting ring 20 of the crossbeam 7. The limiting rods 8 on both sides of the crossbeam 7 are aligned with the grooves 6 on the bracket 5 and inserted to complete the placement. The cap 2 is closed and the solution is introduced to carry out the test. After the test, drain the solution from the test container 1, open the cap 2, push the crossbeam 7 so that its limiting rod 8 is at the outlet of the groove 6, and lift the crossbeam 7, thereby lifting the three test fixtures 3 together from the test container 1. When disassembling the test fixture 3, the hook 30 at its upper end can be pulled out from the first lifting ring 20 to separate the hook 30 from the first lifting ring 20, and then the test fixture 3 integrated with the hook 30 can be disassembled. The sample located in the test fixture 3 can be taken out and the condition of the sample can be observed through a microscope, thus completing the test.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0030] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for stress corrosion resistance testing, used to suspend a test fixture (3) in a test container (1), characterized in that, include: Two brackets (5) are fixedly mounted on the inner wall of the test container (1) in an opposing manner and at a certain height from the bottom surface of the test container (1). Each bracket (5) includes a mounting part for connecting with the inner wall of the test container (1), and a vertical positioning groove is formed on its upper end. The crossbeam (7) has two ends whose shapes are adapted to the inner contour of the positioning groove. The crossbeam (7) is suspended between the two supports (5) by inserting the ends of the crossbeam (7) into the positioning groove. The tooling connection structure includes a sliding seat (10) that is slidably sleeved on the crossbeam (7), and a connection assembly that connects the sliding seat (10) and the test tooling (3).

2. The tooling and lifting fixture for stress corrosion testing according to claim 1, characterized in that, The mounting part is a mounting plate (4) that is fixedly connected to the bracket (5). The mounting plate (4) has an arc-shaped surface on one side that fits against the inner wall of the test container (1). The surface of the mounting plate (4) is provided with a fixing hole, and a fixing member is inserted through the fixing hole. The other end of the fixing member is screwed into a fixing groove opened in the inner wall of the test container (1).

3. The tooling and lifting fixture for stress corrosion testing according to claim 2, characterized in that, Limiting rods (8) are provided on both sides of the crossbeam (7), and the bracket (5) has grooves (6) with connecting positioning slots on its two sides. The grooves (6) are "L" shaped structures. The limiting rods (8) can move from the first position to the second position along the grooves (6) to lock, so as to longitudinally limit the crossbeam (7) on the bracket (5).

4. The tooling and lifting fixture for stress corrosion testing according to claim 3, characterized in that, The crossbeam (7) has a plurality of first mounting holes (9) spaced apart on its side along its length direction. The sliding seat (10) has a second mounting hole (11) corresponding to the first mounting hole (9) on its side. A first bolt (12) for passing through the second mounting hole (11) and the first mounting hole (9) is provided between them. A first nut (13) is provided at the tail end of the first bolt (12).

5. The tooling and lifting fixture for stress corrosion resistance testing according to any one of claims 2-4, characterized in that, The connection component includes: The second bolt (14) and the second nut (16) adapted to the second bolt (14) are provided. The sliding seat (10) has two spaced ends at its lower end. The ends are provided with a third mounting hole (15) through which the second bolt (14) passes. The rod of the second bolt (14) is provided with a through groove (18). The screw (17) has one end passing through the through groove (18). A limiting nut (19) is threadedly connected to the screw (17); The first lifting ring (20) is located at the lower end of the screw (17); The suspension mechanism is connected at one end to the first lifting ring (20) and at the other end to the test fixture (3).

6. The tooling and lifting fixture for stress corrosion testing according to claim 5, characterized in that, The suspension mechanism is a hook (30) with one end fixed to the test fixture (3), and the other end of the hook (30) is detachably connected to the first lifting ring (20).

7. The tooling and lifting fixture for stress corrosion testing according to claim 5, characterized in that, The suspension mechanism includes: The U-shaped connector (21) is movably connected to the first lifting ring (20), and the two ends of the U-shaped connector (21) are provided with second lifting rings (22). The lifting head (23) has a through hole (24) at its upper end; The third bolt (25) passes through the through hole (24) and the second lifting ring (22); The third nut (26) is threadedly connected to the third bolt (25), and the lifting head (23) has a fourth mounting hole (28) at its lower end. The surface of the test fixture (3) has a fifth mounting hole (29) corresponding to the fourth mounting hole (28). The fourth bolt (27) is used to pass through the fifth mounting hole (29) of the fourth mounting hole (28).

8. The tooling and lifting fixture for stress corrosion testing according to claim 1, characterized in that, The lifting device is made of a material resistant to hydrogen sulfide corrosion.

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