CN112816344A - Annular fuel assembly framework shearing detection device and method - Google Patents
Annular fuel assembly framework shearing detection device and method Download PDFInfo
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- CN112816344A CN112816344A CN202011355414.8A CN202011355414A CN112816344A CN 112816344 A CN112816344 A CN 112816344A CN 202011355414 A CN202011355414 A CN 202011355414A CN 112816344 A CN112816344 A CN 112816344A
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- shearing
- annular fuel
- clamping base
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- 238000010008 shearing Methods 0.000 title claims abstract description 44
- 239000000446 fuel Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims description 9
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000002474 experimental method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000003758 nuclear fuel Substances 0.000 abstract description 2
- 229910052770 Uranium Inorganic materials 0.000 description 3
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 3
- HPICRATUQFHULE-UHFFFAOYSA-J uranium(4+);tetrachloride Chemical compound Cl[U](Cl)(Cl)Cl HPICRATUQFHULE-UHFFFAOYSA-J 0.000 description 3
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a device and a method for detecting grid shearing of an annular fuel assembly. The shearing sample welded on the annular fuel assembly grid is formed by correspondingly welding two grid cells on two sides of the guide pipe, one grid cell needs to be fixed during testing, and then the external force is applied to the guide pipe by using a testing machine, so that the guide pipe and the grid cells are separated under the action of shearing force. The invention designs a special shearing tool, and the annular fuel assembly guide pipe and the lattice frame welding sample are always subjected to shearing force without other forces in the shearing test process. The butt welding tongue piece fixing device can effectively fix the butt welding tongue piece and effectively support the guide pipe, can avoid inaccurate results caused by the fact that the guide pipe is scraped due to the received side face in a test, and can be used for a shearing test of a sample.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a device and a method for detecting grid shearing of an annular fuel assembly.
Background
The shearing test is that the loads act on two side surfaces of the sample, the resultant force is a pair of forces with equal magnitude, opposite directions and very close distance between action lines, and the two parts of the sample are dislocated along a shearing surface parallel to the action line of the resultant force. The maximum stress during the sample compression to failure is called compressive strength. This allows the maximum compression force to be determined from the compression force-deformation curve (or read directly from the force dial of the tester) and the compressive strength to be calculated as follows. The shear test, also known as a compression shear test, is a process in which a pair of equal and opposite forces are applied between the weld tongue and the guide tube until the weld joint breaks away or the weld tongue breaks. The maximum force applied at this time, the maximum shear force, was recorded. The principle of annular fuel assembly grid shearing is shown in figure 1.
The shearing sample welded on the annular fuel assembly grid is formed by correspondingly welding two grid cells on two sides of the guide pipe, the grid cells need to be fixed during testing, and then the external force is applied to the guide pipe by using a testing machine, so that the guide pipe and the grid cells are separated under the action of the shearing force.
The integral grid cell and the spot welding sample between the control rod guide tubes are formed by matching and then spot welding the grid cells and the control rod guide tubes, the control length (L) of the guide tubes is 30mm to 40mm during sampling, a grid welding shear sample is grid cell 3 welded to the opposite side of the grid, the outer diameter phi 12.243mm and the inner diameter phi 11.227mm of the grid 5 are obtained, the thickness of the grid cells is 0.4mm to 0.5mm, and the welding spots 4 are distributed into double welding spots as shown in figure 2.
The experimental requirement is that the single shearing test is required, one of the pipe or the grid cell needs to be fixed, then the other one is subjected to the shearing test by applying pressure or pulling force, the fixing mode of the sample in the clamping device needs to be determined, and meanwhile, the grid cell and the guide pipe are kept parallel in the experimental process
Disclosure of Invention
In view of the above disadvantages, the present invention aims to provide a device and a method for detecting shearing of a grid of an annular fuel assembly, which can clamp a sample, thereby establishing a shearing test method for grid cells of the grid of the annular fuel assembly.
The technical scheme of the invention is as follows:
a shearing detection device for an annular fuel assembly grillwork comprises a clamping base, a cross guide post and a supporting device, wherein the inner diameter of the lower half part is phi 25mm in length of 40mm, the inner diameter of the upper end surface is phi 23mm, a conical section is uniformly and excessively formed between the lower half part and the upper end surface, a guide pipe is ensured to pass through the guide pipe smoothly, a grid element fixing area is arranged at the left side position above the clamping base, and the grid element fixing area is provided with the cross guide post for fixing and placing grid elements; and a threaded hole is formed in the right side position above the clamping base and used for installing a supporting device.
The device is made of 1Cr18Ni9Ti stainless steel, is integrally hollow and cylindrical, and has a height of 85-90 mm and an outer diameter phi of 51-53 mm.
The threaded hole is an M5 threaded hole with the depth of 10-12mm,
the clamping base is integrally in a hollow cylinder shape, the upper half part of the clamping base is cut off at a position 40-45mm downwards along the diameter direction of the top of the cylinder structure of the clamping base, wherein the length of the lower half part of the clamping base is 40mm, the inner diameter of the clamping base is phi 25mm, and the inner diameter of the upper end surface of the clamping base is phi 23mm, so that the guide pipe and the grid cells can smoothly pass through the clamping base; the hollow part of lower half is the stand pipe and places the district for place the stand pipe.
The upper part of the cross guide post is a cross part, the lower part of the cross guide post is a cylindrical structure, and the cross guide post is arranged at the top of the grid cell fixing area of the clamping base and used for fixedly placing grid cells.
The height of the cross guide post is 28 mm-30 mm, the whole width is 15.6 mm-15.7 mm, the width of the cross is 7.05 mm-7.10 mm, and the depth of the cross is 4.4 mm-4.5 mm.
The supporting device is provided with an M5 threaded hole with the depth of 10-12mm at the top of the guide tube placing area and is used for installing the supporting device.
The supporting device comprises a threaded rod and a rotary supporting sheet, wherein the rotary supporting sheet is rectangular, is long and is arranged at the top end of the threaded rod and used for transversely supporting the guide tube, so that the guide tube is in a vertical state in the detection stage.
The length of the threaded rod is 30-35mm, and the diameter is phi 2-3 mm; the rotary supporting sheet is rectangular, the length is 13-15mm, and the width is 6-8 mm.
A method for detecting shearing of a ring fuel assembly framework comprises the following steps: inserting grid cells on one side of a grid welding sample into a sleeve of a shearing device, enabling welding points to face downwards, enabling the other grid cell to hang freely, and inserting a guide pipe into a middle hole of the shearing device;
step two: supporting the sample guide tube part by using a side supporting sheet to keep the sample guide tube part in a vertical state;
step three: placing the shearing device and the sample on a compression platform of a testing machine, starting a shearing test, and removing the side support of the guide pipe before a pressure plate of the testing machine contacts the top end of the grid and the shearing force reaches the maximum value;
step four: and after the experiment is finished, taking out the clamping device, taking out the sample, repeating the operation, and carrying out a shear test on the grid cells on the other side.
The invention has the beneficial effects that:
the invention establishes an oxidation-reduction titration detection method for uranium content in uranium tetrachloride, and the uranium content in the uranium tetrachloride can be accurately determined by using experimental conditions listed in the content of the invention, and the determination precision of the method is superior to 0.6%. The method can be used for determining the uranium content in the uranium tetrachloride, and is effectively matched with the special production.
Drawings
FIG. 1 is a schematic diagram of the principle of lattice shear for a ring fuel assembly;
FIG. 2 is a schematic view of a grid welded sample of annular fuel assemblies;
FIG. 3 is a top view of the annular fuel assembly grid cell shearing apparatus of the present invention;
FIG. 4 is a left side view of the annular fuel assembly grid cell shearing apparatus of the present invention;
FIG. 5 is a front view of the annular fuel assembly grid cell shearing apparatus of the present invention;
FIG. 6 is a left side view of the annular fuel assembly grid cell shearing apparatus of the present invention;
figure 7 is an assembly view of the annular fuel assembly grid shearing apparatus of the present invention.
In the figure: 1. upward shear force; 2. downward shear force; 3. grid cells; 4. welding spots; 5. a guide tube; 6. clamping the base; 7. a cross guide post; 8. a support device; 9. a guide tube placement area; 10. a threaded M5 hole; 11. a threaded rod; 12. the rotating support piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a ring fuel assembly grillage shearing detection device, the material is 1Cr18Ni9Ti stainless steel, and the whole is hollow cylinder shape, and the height is 85mm ~ 90mm, and external diameter phi 51mm ~ phi 53 mm. Comprises a clamping base 6, a cross guide post 7 and a supporting device 8; wherein the length of 40mm of lower half is phi 25mm in internal diameter, and the internal diameter of up end is phi 23mm, and even transition is the toper cross-section between, can guarantee that the stand pipe passes through smoothly. A grid cell fixing area is arranged at the left side position above the clamping base 6, and a cross-shaped guide post 7 is arranged in the grid cell fixing area and used for fixedly placing grid cells; and an M5 threaded hole with the depth of 10-12mm is arranged at the right side position above the clamping base 6 and is used for installing the supporting device 8.
The clamping base 6 is integrally in a hollow cylinder shape, the upper half part of the clamping base 6 is cut off at a position 40-45mm below the top diameter direction of the cylinder structure of the clamping base 6, wherein the length of 40mm at the lower half part is phi 25mm, and the inner diameter of the upper end surface is phi 23mm, so that the guide pipe and the grid cell can smoothly pass through the clamping base; the hollow part of the lower half part is a guide tube placing area 9 for placing a guide tube.
The upper part of the cross guide post 7 is a cross part, the lower part of the cross guide post is a cylindrical structure and is arranged at the top of the grid cell fixing area of the clamping base 6, the height of the cross guide post 7 is 28-30 mm, the whole width is 15.6-15.7 mm, the cross width is 7.05-7.10 mm, and the cross depth is 4.4-4.5 mm, so that the cross guide post is used for fixing and placing grid cells.
The supporting device 8 is provided with an M5 threaded hole 10 with the depth of 10-12mm at the top of the guide tube placing area 9 and is used for installing the supporting device 8; the supporting device 8 comprises a threaded rod 11 and a rotary supporting piece 12, wherein the length of the threaded rod 11 is 30-35mm, and the diameter of the threaded rod is phi 2-3 mm; the rotary supporting sheet 12 is rectangular, has the length of 13-15mm and the width of 6-8mm, is arranged at the top end of the threaded rod 11 and is used for transversely supporting the guide tube so as to enable the guide tube to be in a vertical state in the detection stage.
A method for detecting shearing of a grid of a ring fuel assembly, as shown in fig. 7, comprising the steps of:
the method comprises the following steps: inserting grid cells on one side of a grid welding sample into a sleeve of a shearing device, enabling welding points to face downwards, enabling the other grid cell to hang freely, and inserting a guide pipe into a middle hole of the shearing device;
step two: the sample guide tube portion was supported in a vertical position using a side support piece, see FIG. 6;
step three: placing the shearing device (together with the sample) on a compression platform of a testing machine, starting a shearing test, and removing the side support of the guide pipe before a pressure plate of the testing machine contacts the top end of the grid and the shearing force reaches the maximum value;
step four: and after the experiment is finished, taking out the clamping device, taking out the sample, repeating the operation, and carrying out a shear test on the grid cells on the other side.
In the drawings of the disclosed embodiments of the invention, only methods related to the disclosed embodiments are referred to, other methods can refer to common design, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides an annular fuel assembly grillage cuts detection device, includes centre gripping base, cross guide pillar and strutting arrangement, its characterized in that:
wherein the length of the lower half part of 40mm is phi 25mm, the inner diameter of the upper end surface is phi 23mm, the uniform transition is a conical section, the smooth passing of the guide pipe is ensured, the left side position above the clamping base is provided with a grid cell fixing area, and the grid cell fixing area is provided with a cross-shaped guide post for fixing and placing the grid cell; and a threaded hole is formed in the right side position above the clamping base and used for installing a supporting device.
2. The annular fuel assembly grid shear test apparatus of claim 1, wherein: the device is made of 1Cr18Ni9Ti stainless steel, is integrally hollow and cylindrical, and has a height of 85-90 mm and an outer diameter phi of 51-53 mm.
3. The annular fuel assembly grid shear test apparatus of claim 1, wherein: the threaded hole is an M5 threaded hole, and the depth is 10-12 mm.
4. The annular fuel assembly grid shear test apparatus of claim 1, wherein: the clamping base is integrally in a hollow cylinder shape, the upper half part of the clamping base is cut off at a position 40-45mm downwards along the diameter direction of the top of the cylinder structure of the clamping base, wherein the length of the lower half part of the clamping base is 40mm, the inner diameter of the clamping base is phi 25mm, and the inner diameter of the upper end surface of the clamping base is phi 23mm, so that the guide pipe and the grid cells can smoothly pass through the clamping base; the hollow part of lower half is the stand pipe and places the district for place the stand pipe.
5. The annular fuel assembly grid shear test apparatus of claim 1, wherein: the upper part of the cross guide post is a cross part, the lower part of the cross guide post is a cylindrical structure, and the cross guide post is arranged at the top of the grid cell fixing area of the clamping base and used for fixedly placing grid cells.
6. The annular fuel assembly grid shear test apparatus of claim 5, wherein: the height of the cross guide post is 28 mm-30 mm, the whole width is 15.6 mm-15.7 mm, the width of the cross is 7.05 mm-7.10 mm, and the depth of the cross is 4.4 mm-4.5 mm.
7. The annular fuel assembly grid shear test apparatus of claim 1, wherein: the supporting device is provided with an M5 threaded hole with the depth of 10-12mm at the top of the guide tube placing area and is used for installing the supporting device.
8. The annular fuel assembly grid shear test apparatus of claim 7, wherein: the supporting device comprises a threaded rod and a rotary supporting sheet, wherein the rotary supporting sheet is rectangular, is long and is arranged at the top end of the threaded rod and used for transversely supporting the guide tube, so that the guide tube is in a vertical state in the detection stage.
9. The annular fuel assembly grid shear test apparatus of claim 8, wherein: the length of the threaded rod is 30-35mm, and the diameter is phi 2-3 mm; the rotary supporting sheet is rectangular, the length is 13-15mm, and the width is 6-8 mm.
10. The method for detecting the grid shearing of the annular fuel assembly is characterized by comprising the following steps of:
the method comprises the following steps: inserting grid cells on one side of a grid welding sample into a sleeve of a shearing device, enabling welding points to face downwards, enabling the other grid cell to hang freely, and inserting a guide pipe into a middle hole of the shearing device;
step two: supporting the sample guide tube part by using a side supporting sheet to keep the sample guide tube part in a vertical state;
step three: placing the shearing device and the sample on a compression platform of a testing machine, starting a shearing test, and removing the side support of the guide pipe before a pressure plate of the testing machine contacts the top end of the grid and the shearing force reaches the maximum value;
step four: and after the experiment is finished, taking out the clamping device, taking out the sample, repeating the operation, and carrying out a shear test on the grid cells on the other side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355414.8A CN112816344A (en) | 2020-11-27 | 2020-11-27 | Annular fuel assembly framework shearing detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355414.8A CN112816344A (en) | 2020-11-27 | 2020-11-27 | Annular fuel assembly framework shearing detection device and method |
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| CN112816344A true CN112816344A (en) | 2021-05-18 |
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| CN202011355414.8A Pending CN112816344A (en) | 2020-11-27 | 2020-11-27 | Annular fuel assembly framework shearing detection device and method |
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| CN (1) | CN112816344A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445431A (en) * | 2021-07-28 | 2021-09-28 | 中铁二十四局集团有限公司 | Anti-slip rapid positioning method for large longitudinal slope beam body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351720A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for shearing detection of annular fuel assembly guide pipe |
| CN211697239U (en) * | 2019-12-24 | 2020-10-16 | 中核建中核燃料元件有限公司 | Fixture for detecting shearing force of spot welding of spacer grid guide pipe and spacer grid |
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2020
- 2020-11-27 CN CN202011355414.8A patent/CN112816344A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351720A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for shearing detection of annular fuel assembly guide pipe |
| CN211697239U (en) * | 2019-12-24 | 2020-10-16 | 中核建中核燃料元件有限公司 | Fixture for detecting shearing force of spot welding of spacer grid guide pipe and spacer grid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445431A (en) * | 2021-07-28 | 2021-09-28 | 中铁二十四局集团有限公司 | Anti-slip rapid positioning method for large longitudinal slope beam body |
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Application publication date: 20210518 |