CN214201033U - Pipe fillet weld fatigue performance test device - Google Patents
Pipe fillet weld fatigue performance test device Download PDFInfo
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- CN214201033U CN214201033U CN202022735863.7U CN202022735863U CN214201033U CN 214201033 U CN214201033 U CN 214201033U CN 202022735863 U CN202022735863 U CN 202022735863U CN 214201033 U CN214201033 U CN 214201033U
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Abstract
The utility model provides a pipe fillet weld fatigue performance test device, including fatigue test spare, upper clamp and lower clamp, wherein, the fatigue test spare includes first pipe appearance and second pipe appearance, and the one end welding of first pipe appearance is on the lateral wall of second pipe appearance; the upper end of the upper clamp is connected with a driving rod of the fatigue testing machine; the upper clamp is connected with the free end of the first tube sample; the upper end of the lower clamp is connected with one end of the second tube sample; the lower end of the lower clamp is connected with the bottom of the cavity of the fatigue testing machine; the fatigue life of the pipeline fillet weld which cannot be obtained by the conventional test means under different service conditions can be obtained, and the application of related pipeline structures and the research and development of welding materials and processes are guided; and simultaneously, the utility model discloses can the direct mount on conventional fatigue testing machine's the workstation, practice thrift the cost, richen fatigue testing machine's work function.
Description
Technical Field
The utility model belongs to material fatigue test device field, concretely relates to tubular product fillet weld fatigue performance test device.
Background
In the fields of transportation machinery, energy, industrial equipment and the like, due to vibration, frequent start and stop, variable power operation, cold and hot alternation and the like, the used pipeline material can bear repeated stress. Therefore, it is important to study the fatigue performance of the material to understand the service state of the material.
The existing fatigue tests mainly include a tensile-compressive stress type, a bending stress type and a torsional stress type. The actual structures and stress conditions of machinery and equipment have diversity, and the existing fatigue test means cannot meet the fatigue performance test of complex components and special service conditions. For example, due to the adjustment of the electric power structure in China, the new energy power generation industry develops rapidly, but the new energy power generation such as wind energy, photovoltaic and water conservancy has certain instability. In order to ensure the stability of power supply in China, the start-stop and peak-shaving operation of domestic thermal power plants are very frequent, and the fillet welds of a large number of thermal power plant headers and pipelines are frequently cracked in the last two years. Through failure analysis, the cracking reason is found to be that the collection box and the pipeline fillet weld have fatigue failure due to frequent start-stop peak shaving. The mismatching of the fatigue property of the fillet weld of the pipe and the requirement of the service condition on the fatigue property is demonstrated. Therefore, the research on the fatigue performance of the pipe fillet weld is of great significance for evaluating the service performance of the pipe fillet weld and researching and developing welding materials and processes. However, there is currently no relevant method or apparatus for testing the fatigue performance of pipe fillet welds.
Disclosure of Invention
An object of the utility model is to provide a tubular product fillet weld fatigue performance test device has solved at present and has not yet had test method and device to test the fatigue performance of tubular product fillet weld, the utility model discloses a test device is significant to the performance on active service research and welding material and the technological research of tubular product fillet weld, also has very wide application prospect.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a pipe fillet weld fatigue performance test device, including fatigue test spare, upper clamp and lower clamp, wherein, the fatigue test spare includes first pipe appearance and second pipe appearance, and the one end welding of first pipe appearance is on the lateral wall of second pipe appearance; the upper end of the upper clamp is connected with a driving rod of the fatigue testing machine; the upper clamp is connected with the free end of the first tube sample; the upper end of the lower clamp is connected with one end of the second tube sample; the lower end of the lower clamp is connected with a workbench of the fatigue testing machine.
Preferably, the second tube sample is movably connected with the lower clamp.
Preferably, an external thread is arranged at one end of the second pipe sample, and the external thread section is in threaded connection with the lower clamp.
Preferably, the first tube sample and the upper clamp are movably connected.
Preferably, the free end of the first pipe sample is provided with an external thread, and the external thread section is in threaded connection with the upper clamp.
Preferably, the upper clamp comprises a first component and a second component, wherein the first component and the second component are movably connected, and the axis of the first component is perpendicular to the axis of the second component.
Preferably, a through hole is formed in the side wall of the first component, and the second component is assembled in the through hole; the axis of the through hole is perpendicular to the axis of the first component.
Preferably, a first central threaded hole is formed in one end of the first assembly, and the first central threaded hole is in threaded connection with the driving rod; and a second central threaded hole is formed in one end part of the second assembly and is in threaded connection with the first pipe sample.
Preferably, the lower clamp comprises a third assembly and a fourth assembly, wherein the third assembly and the fourth assembly are movably connected, and the axis of the third assembly is perpendicular to the axis of the fourth assembly.
Preferably, a third central threaded hole is formed in one end of the third assembly; the third central threaded hole is in threaded connection with the second pipe sample; the free end of the third component is provided with an external thread; and a fourth central threaded hole is formed in the end part of one end of the fourth component, and the external thread section of the third component is connected with the fourth central threaded hole in a matched mode.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pipe fillet weld fatigue performance test device, through last anchor clamps and lower anchor clamps with the fatigue test spare fix on fatigue test machine, realize the fatigue performance research of pipeline fillet weld, including cold and hot fatigue, stress fatigue and cold and hot and stress compound fatigue, and then can acquire the fatigue life of pipeline fillet weld under different service conditions, guide the application of relevant structure and the research and development of welding material and technology; and simultaneously, the utility model discloses can the direct mount on conventional fatigue testing machine's the workstation, practice thrift the cost, richen fatigue testing machine's work function.
Drawings
FIG. 1 is a schematic view of a pipe fillet weld fatigue test apparatus;
FIG. 2 is a schematic view of a pipe fillet weld fatigue test piece;
FIG. 3 is a schematic view of the assembly of the upper clamp of the pipe fillet weld fatigue test apparatus;
FIG. 4 is a schematic view of the assembly of a lower clamp of the pipe fillet weld fatigue test device;
the device comprises a first pipe sample 1, a first pipe sample 2, a second pipe sample 3, a fillet weld 4, a first assembly 5, a second assembly 6, a third assembly 7, a fourth assembly 8, a heating layer 9, a heat preservation layer 10, a thermocouple 11, a computer control system 12, a signal transmission line 13 and a driving rod.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but these descriptions are merely exemplary and are not intended to limit the scope of the present invention in any way.
As shown in fig. 1 to 4, the pipe fillet weld fatigue performance testing apparatus provided by the present invention mainly comprises a fatigue testing piece, an upper clamp and a lower clamp, wherein the upper end of the upper clamp is connected with a driving rod 13 of the fatigue testing machine; the lower end of the upper clamp is connected with one end of the fatigue test piece; the upper end of the lower clamp is connected with the other end of the fatigue test piece; the lower end of the lower clamp is connected with a workbench of the fatigue testing machine.
As shown in fig. 2, the fatigue test piece comprises a first tube sample 1 and a second tube sample 2, wherein the first tube sample 1 and the second tube sample 2 are connected through a fillet weld 3; the axis of the first tube sample 1 and the axis of the second tube sample 2 are perpendicular to each other, and the inner cavities of the two tubes are communicated.
And one end of the second tube sample 2 is provided with an external thread.
As shown in fig. 3, the upper fixture includes a first assembly 4 and a second assembly 5, wherein a through hole is opened on a side wall of the first assembly 4, and the second assembly 5 is assembled in the through hole; the axis of the first component 4 and the axis of the second component 5 are perpendicular to each other.
A first central threaded hole is formed in one end of the first assembly 4.
And a second central threaded hole is formed in one end part of the second component 5.
As shown in fig. 4, the lower fixture includes a third component 6 and a fourth component 7, wherein one end of the third component 6 is provided with an external thread, and the other end face is provided with a third central threaded hole; a fourth central threaded hole is formed in the end face of one end of the fourth component 7; the threaded section of the third component 6 is fitted in the fourth central threaded hole.
And the thread section of the second tube sample is arranged in the third central thread hole in a matching way.
A heating layer 8 is arranged on the inner wall of the cavity of the conventional fatigue testing machine; and a heat-insulating layer 9 is arranged on the outer wall of the cavity.
A first mounting hole is formed in the bottom of the cavity, and the third component 6 is mounted in the first mounting hole in a matched mode.
The top of cavity has been seted up the second mounting hole, the cooperation is installed in the second mounting hole and is installed actuating lever 13, the first central threaded hole on first subassembly 4 is installed in the cooperation of the work end of actuating lever 13.
The free end of the first pipe sample 1 is provided with an external thread, and the external thread section is installed in a second central threaded hole formed in the second component 5 in a matched mode.
The second sample tube 2 is provided with a thermocouple 10, and the thermocouple 10 is connected to a computer control system 11 through a signal transmission line 12.
The utility model discloses a working process:
the second sample tube 2 is measured by the thermocouple 10, and the temperature is transmitted to the computer control system 11 through the signal transmission line 12, so that the heating layer 8 is controlled by the computer control system 11.
The whole device is connected with a conventional fatigue testing machine system through the driving rod 13 and the fourth component 7, so that the fatigue performance testing function of the pipe fillet weld is realized; specifically, the method comprises the following steps:
the fourth component 7 is fixed on a working platform of a conventional fatigue testing machine in a welding or bolt connection mode; the third component 6 and the fourth component 7 are connected by screw thread to be assembled into a lower clamp;
mounting the fatigue test piece on the third component 6 of the lower clamp in a threaded connection mode, and ensuring that the first tube sample 1 faces the driving rod 13; the first assembly 4 of the upper clamp is installed on the driving rod 13 in a threaded connection mode, and a control rod of the fatigue testing machine is controlled, so that the axis of the through threaded hole of the first assembly 4 of the upper clamp is aligned with the axis of the first pipe sample 1.
The first and second modules 4 and 5 of the upper clamp are connected and connected to the first tube sample 1.
And closing the working chamber to complete the assembly of the experimental device. And carrying out data collection and fatigue test parameter control through a computer control system 11 of the fatigue testing machine, and carrying out a fatigue performance test.
Claims (10)
1. The pipe fillet weld fatigue performance testing device is characterized by comprising a fatigue testing piece, an upper clamp and a lower clamp, wherein the fatigue testing piece comprises a first pipe sample (1) and a second pipe sample (2), and one end of the first pipe sample (1) is welded on the side wall of the second pipe sample (2); the upper end of the upper clamp is connected with a driving rod (13) of the fatigue testing machine; the upper clamp is connected with the free end of the first tube sample (1); the upper end of the lower clamp is connected with one end of the second tube sample (2); the lower end of the lower clamp is connected with a workbench of a conventional fatigue testing machine.
2. The pipe fillet weld fatigue property test device according to claim 1, wherein the second pipe sample (2) is movably connected with the lower clamp.
3. The pipe fillet weld fatigue property test device according to claim 1 or 2, wherein one end of the second pipe sample (2) is provided with an external thread, and the external thread section is in threaded connection with the lower clamp.
4. The pipe fillet weld fatigue property test device according to claim 1, wherein the first pipe sample (1) is movably connected with the upper clamp.
5. The pipe fillet weld fatigue property test device according to claim 1 or 4, wherein the free end of the first pipe sample (1) is provided with an external thread, and the external thread section is in threaded connection with the upper clamp.
6. The pipe fillet weld fatigue property testing device according to claim 1, wherein the upper clamp comprises a first component (4) and a second component (5), wherein the first component (4) and the second component (5) are movably connected, and the axis of the first component (4) is perpendicular to the axis of the second component (5).
7. The pipe fillet weld fatigue property testing device according to claim 6, wherein a through hole is formed on the side wall of the first component (4), and the second component (5) is assembled in the through hole; the axis of the through hole is perpendicular to the axis of the first component (4).
8. The pipe fillet weld fatigue performance testing device according to claim 6 or 7, wherein a first central threaded hole is formed in one end of the first component (4), and the first central threaded hole is in threaded connection with the driving rod; and a second central threaded hole is formed in one end part of the second assembly (5), and the second central threaded hole is in threaded connection with the first tube sample (1).
9. The pipe fillet weld fatigue property testing device according to claim 1, wherein the lower clamp comprises a third component (6) and a fourth component (7), wherein the third component (6) and the fourth component (7) are movably connected, and the axis of the third component (6) and the axis of the fourth component (7) are perpendicular to each other.
10. The pipe fillet weld fatigue performance testing device according to claim 9, wherein a third central threaded hole is formed in one end of the third component (6); the third central threaded hole is in threaded connection with the second tube sample (2); the free end of the third component (6) is provided with an external thread; a fourth central threaded hole is formed in the end portion of one end of the fourth component (7), and an external threaded section of the third component (6) is connected with the fourth central threaded hole in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022735863.7U CN214201033U (en) | 2020-11-23 | 2020-11-23 | Pipe fillet weld fatigue performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022735863.7U CN214201033U (en) | 2020-11-23 | 2020-11-23 | Pipe fillet weld fatigue performance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214201033U true CN214201033U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022735863.7U Active CN214201033U (en) | 2020-11-23 | 2020-11-23 | Pipe fillet weld fatigue performance test device |
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| Country | Link |
|---|---|
| CN (1) | CN214201033U (en) |
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- 2020-11-23 CN CN202022735863.7U patent/CN214201033U/en active Active
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