CN211528087U - Device for reverse bending test of small-caliber thin-wall welded pipe - Google Patents
Device for reverse bending test of small-caliber thin-wall welded pipe Download PDFInfo
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- CN211528087U CN211528087U CN201921190942.5U CN201921190942U CN211528087U CN 211528087 U CN211528087 U CN 211528087U CN 201921190942 U CN201921190942 U CN 201921190942U CN 211528087 U CN211528087 U CN 211528087U
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Abstract
The utility model discloses a device for a small-caliber thin-wall welded pipe reverse bending test, which comprises a base and a fixed sample bracket fixedly arranged on the base; the base is provided with a sliding groove, a movable sample support is arranged in the sliding groove, a return spring is arranged between the fixed sample support and the movable sample support, the base is fixedly connected with a bolt support, the movable sample support is positioned between the fixed sample support and the bolt support, and a bolt penetrates through the bolt support through threaded connection; a handle is hinged on the fixed sample bracket through a pin shaft, and a bent core is arranged below the handle; the middle part of one side of the fixed sample support adjacent to the movable sample support is provided with two notches with equal height at the bottom, and the transverse widths of the two notches are the same; the utility model has the advantages of simple structure, convenient to use, welding seam location are accurate, application scope is wide, reduction intensity of labour that can be very big promotes detection efficiency.
Description
Technical Field
The utility model relates to a device that is used for small-bore thin wall welded pipe reverse bending test.
Background
The welded pipe is formed by welding band steel in a curling manner, has the advantages of high production efficiency, low price and the like, and is widely applied to nuclear power and auxiliary heat exchange equipment. To control the quality of the welded pipe, a reverse bend test is generally required.
The reverse bending test is an effective method for verifying the weld quality of the welded pipe, and ASME SA-688/SA-688M, ASME SA-1016/SA-1016M, related material purchasing technical specifications and the like all require the reverse bending test on the pipe weld. The reverse bending test is to longitudinally cut a welding pipe with the length of 100mm at 90-degree positions on two sides of a welding seam, flatten a sample piece, perform reverse bending (the bending direction is opposite to that of the welding seam when the sample is in a tubular shape) to 180 degrees by adopting a bending core with the wall thickness of 4 times of the pipe, and then detect the deformation bearing capacity of the welding seam of the welding pipe.
The existing bending tester mainly aims at transverse bending tests of thicker plates or longitudinal bending tests of pipe welding joints, the diameter of a supporting roller is larger (up to 25 mm), the minimum distance between supporting points of two supporting rollers reaches 50mm, and the existing minimum bending core exceeds 8 mm; for a small-caliber thin-wall welded pipe, the diameter is generally less than 20mm, the wall thickness is generally less than 2mm, the length of the unfolded sample is generally less than 30mm and also less than the minimum distance between the support points of the two support rollers, the bending support rollers are not suitable, and the sample is difficult to position during a bending test; in addition, because the test sample is small and thin, the deformation area of the bending test is small, the maximum bending point is often deviated from the welding line, the reverse bending test is not easy to complete, and the inspection efficiency is extremely low.
Disclosure of Invention
The utility model aims at the above-mentioned not enough of prior art, provide a device that is used for small-bore thin wall welded pipe reverse bending test, it has simple structure, convenient to use, welding seam location accuracy, application scope wide advantage, reduction intensity of labour that can be very big promotes detection efficiency.
In order to achieve the purpose, the device for the reverse bending test of the small-caliber thin-wall welded pipe comprises a base and a fixed sample support fixedly arranged on the base; the method is characterized in that: the base is provided with a sliding groove, a movable sample support is arranged in the sliding groove, a return spring is arranged between the fixed sample support and the movable sample support, the base is fixedly connected with a bolt support, the movable sample support is positioned between the fixed sample support and the bolt support, and a bolt penetrates through the bolt support through threaded connection; a handle is hinged on the fixed sample support through a pin shaft, and a bent core is arranged between the fixed sample support and the movable sample support below the handle; the middle part of one side of the fixed sample support adjacent to the movable sample support is provided with two notches with equal height at the bottom, and the transverse widths of the two notches are the same;
when the device is used, a sample is placed in the two notches, and a welding seam is located at the upper center of the sample; rotating the bolt and pushing the movable sample support to be close to the fixed sample support until two ends of the sample are contacted with the side walls of the two notches, so that the centering performance of the sample is ensured; the two sample supports are symmetrically arranged relative to the bent core and have a guiding effect, the handle is rotated downwards to push the bent core to move downwards, so that the sample is bent to 180 degrees, the sample can be reversely bent, the test is completed, and the device has the advantages of simple structure, convenience in use and accurate centered positioning of a welding line, the labor intensity can be greatly reduced, and the inspection efficiency is improved; the position of the movable sample support is adjusted, the bending spans with different sizes can be set, the requirements of different samples are met, and the application range is wide;
as a further improvement of the utility model, a graduated scale is arranged on the base; the span of the two sample supports can be conveniently measured, and the centered position of the welding seam of the sample can be ensured;
as a further improvement of the utility model, the upper end of the curved core is provided with a groove, and the middle part of the handle is arranged in the groove; when the bending core descends, the transverse movement can be avoided, and the test accuracy is ensured;
to sum up, the utility model has the advantages of simple structure, convenient to use, welding seam location are accurate, application scope is wide, reduction intensity of labour that can be very big promotes inspection efficiency.
Drawings
Fig. 1 is a front view of a usage state of the embodiment of the present invention.
Fig. 2 is a top view of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the apparatus for the reverse bending test of the small-caliber thin-wall welded pipe of the embodiment includes a base 1, and a fixed sample holder 2 fixed on the base 1; a dovetail-shaped sliding groove 5 is arranged on the base 1, a movable sample support 3 is arranged in the sliding groove 5 through a dovetail-shaped convex block at the bottom, a reset spring 4 is arranged between the fixed sample support 2 and the movable sample support 3, a bolt support 6 and a graduated scale 8 are fixedly connected on the base 1, the movable sample support 3 is positioned between the fixed sample support 2 and the bolt support 6, and a bolt 7 penetrates through the bolt support 6 through threaded connection; a handle 10 is hinged on the fixed sample support 2 through a pin shaft 9, a bent core 11 is arranged between the fixed sample support 2 and the movable sample support 3 below the handle 10, a groove 12 is arranged at the upper end of the bent core 11, and the middle part of the handle 10 is arranged in the groove 12; the middle part of one side of the fixed sample support 2 adjacent to the movable sample support 3 is provided with two notches 13 with equal height at the bottom, and the transverse widths of the two notches 13 are also the same;
when in use, a sample 14 is placed in the two notches 13, and the welding seam 15 is positioned at the upper central position of the sample 14; rotating the bolt 7 and pushing the movable sample support 3 to be close to the fixed sample support 2 until two ends of the sample 14 are contacted with the side walls of the two notches 13, so that the centering property of the sample 14 is ensured; the two sample supports 2 and 3 are symmetrically arranged relative to the bent core 11 and have a guiding function, the handle 10 is rotated downwards to push the bent core 11 to move downwards, the sample 14 is bent to 180 degrees, the sample can be bent reversely, the test is completed, the handle 10 is rotated reversely, the sample 14 is taken down, the appearance of the welding seam of the sample 14 is observed, and the test result is recorded; the device has the advantages of simple structure, convenient use and accurate centered positioning of the welding line, can greatly reduce the labor intensity and improve the inspection efficiency; the position of the movable sample support 3 is adjusted, the bending spans with different sizes can be set, the requirements of different samples are met, and the application range is wide; when the bending core 11 descends, the middle part of the handle 10 is arranged in the groove 12, so that the transverse movement can be avoided, and the accuracy of the test is ensured; the graduated scale 8 can conveniently measure the span of the two sample supports 2 and 3, and can also ensure the centered position of the welding seam of the sample.
Claims (3)
1. A device for a reverse bending test of a small-caliber thin-wall welded pipe comprises a base and a fixed sample support fixedly arranged on the base; the method is characterized in that: the base is provided with a sliding groove, a movable sample support is arranged in the sliding groove, a return spring is arranged between the fixed sample support and the movable sample support, the base is fixedly connected with a bolt support, the movable sample support is positioned between the fixed sample support and the bolt support, and a bolt penetrates through the bolt support through threaded connection; a handle is hinged on the fixed sample support through a pin shaft, and a bent core is arranged between the fixed sample support and the movable sample support below the handle; the middle part of one side of the fixed sample support adjacent to the movable sample support is provided with two notches with equal height at the bottom, and the transverse widths of the two notches are also the same.
2. The apparatus for reverse bending test of small-caliber thin-wall welded pipe according to claim 1, characterized in that: the base is provided with a graduated scale.
3. The apparatus for reverse bend testing of small-caliber thin-walled welded tubes according to claim 1 or 2, wherein: the upper end of the bent core is provided with a groove, and the middle part of the handle is arranged in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190942.5U CN211528087U (en) | 2019-07-26 | 2019-07-26 | Device for reverse bending test of small-caliber thin-wall welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190942.5U CN211528087U (en) | 2019-07-26 | 2019-07-26 | Device for reverse bending test of small-caliber thin-wall welded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211528087U true CN211528087U (en) | 2020-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921190942.5U Active CN211528087U (en) | 2019-07-26 | 2019-07-26 | Device for reverse bending test of small-caliber thin-wall welded pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211528087U (en) |
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2019
- 2019-07-26 CN CN201921190942.5U patent/CN211528087U/en active Active
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