CN111351707A - Device and method for detecting welding tension of annular fuel assembly guide pipe - Google Patents
Device and method for detecting welding tension of annular fuel assembly guide pipe Download PDFInfo
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- CN111351707A CN111351707A CN201811559914.6A CN201811559914A CN111351707A CN 111351707 A CN111351707 A CN 111351707A CN 201811559914 A CN201811559914 A CN 201811559914A CN 111351707 A CN111351707 A CN 111351707A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a device and a method for detecting welding tension of an annular fuel assembly guide pipe, wherein the device comprises a threaded joint and an olive head; the threaded joint is cylindrical as a whole and 77-95mm in length; the right end is an external thread end, the length of the external thread end is 25-30mm, the thread size is M9 x 0.5-6H, and the external thread end is used for fixedly connecting a guide pipe; the whole olive head is cylindrical, and the length of the olive head is 55-65 mm; the right end is a clamping end B, the length is 6-9mm, the diameter is phi 15.7mm, and the clamping end B is used for clamping a testing machine; the left end is an insertion end, the length is 50-55mm, the outer diameter is phi 14.90mm-0.05, the left end is used for extending into the sample for filling, the middle connecting part of the clamping end B and the insertion end is a transition area B which is a reducing step, and the outer diameter is reduced from phi 15.7 of the clamping end B to phi 14.90mm-0.05 of the olive head. The invention designs and manufactures a special tool for welding, stretching and detecting the annular fuel assembly guide pipe. Therefore, static load tensile detection of the annular fuel assembly guide pipe at room temperature in a welding tensile mode is achieved.
Description
Technical Field
The invention belongs to the technical field of guide pipe welding stretching detection, and particularly relates to a device and a method for detecting welding stretching of a guide pipe of an annular fuel assembly.
Background
The tensile test under static load is one of the most widely used metal mechanical property test methods in industry, and the test is generally carried out in the room temperature (10-35) DEG C range. The test usually adopts a standard smooth cylindrical sample, and the test is characterized in that under determined test conditions (temperature, stress state, loading rate and environment), a plurality of important mechanical property indexes of elasticity, strength, plasticity, strain hardening and the like of the material are measured, and three common failure modes of the material under static load, namely excessive elastic deformation, plastic deformation and fracture are disclosed. The maximum force the specimen can resist after the yield stage. For metallic materials with no apparent yield (continuous yield), the maximum force during the test.
The welding tension of the annular fuel assembly guide pipe is to test the quality of a welding seam by using a tension test method. The maximum tensile strength of the sample is determined by stretching the sample on a tester, typically to break. The clamping part is used for being arranged in a clamp of the testing machine so as to clamp a sample, and the transition gauge length part is required to be ensured to be evenly stressed. The dimensions and requirements of these two parts are determined by the design effect of the weld tension detection device. This is also a difficulty of this invention.
The guide tube welding tensile sample is tubular, made of Zr-4 alloy, as shown in figure 1, the overall length is 120-160mm, the outer diameter of the guide tube welding tensile sample is phi 16.42 +/-0.04, the inner diameter of the guide tube welding tensile sample is phi 15, an end plug is welded at one end of the guide tube welding tensile sample, the center of the end plug is M9-0.5-6H internal threads, and the other end of the end plug is in a phi 16.5 tube opening shape.
Disclosure of Invention
The invention aims to: the two ends of the welding tensile sample of the annular fuel assembly guide pipe are special in structure and cannot be directly clamped on a clamp of an electronic universal testing machine. The invention aims to design and manufacture a special tool for detecting the welding tension of the annular fuel assembly guide pipe. Therefore, the establishment of the static load tensile test method of the annular fuel assembly guide pipe at room temperature in the welding and stretching process is realized.
The technical scheme of the invention is as follows: a welding and stretching detection device for an annular fuel assembly guide pipe comprises a threaded joint and an olive head;
the threaded joint is cylindrical as a whole and 77-95mm in length; the right end is an external thread end, the length of the external thread end is 25-30mm, the thread size is M9 x 0.5-6H, and the external thread end is used for fixedly connecting a guide pipe; the left end is a clamping end A, the length is 55-75mm, and the clamping end A is used for clamping the testing machine; the connecting part between the clamping end A and the external thread end is a transition area A with a slope, the outer diameter of the transition area A is gradually increased from phi 9mm to phi 11mm of the external thread end, and the length of the transition area A is 6-9 mm;
the whole olive head is cylindrical, and the length of the olive head is 55-65 mm; the right end is a clamping end B, the length is 6-9mm, the diameter is phi 15.7mm, and the clamping end B is used for clamping a testing machine; the left end is an insertion end, the length is 50-55mm, the outer diameter is phi 14.90mm-0.05, the left end is used for extending into the sample for filling, the middle connecting part of the clamping end B and the insertion end is a transition region B which is a diameter-changing step, and the outer diameter is changed from phi 15.7 of the clamping end B to phi 14.90mm-0.05 of the transition region B.
Furthermore, the end part of the external thread end is chamfered by 0.5.
Furthermore, the top end of the insertion end is processed by a round corner R2.
Furthermore, the material of the threaded joint is 1Cr17Ni2 martensite.
Furthermore, the olive head is made of 1Cr17Ni2 martensite.
Furthermore, the threaded joint is integrally subjected to quenching and tempering treatment, so that the tensile strength of the stretching tool is not lower than 30000N.
Furthermore, the whole olive head is subjected to quenching and tempering treatment, and the tensile strength of the stretching tool is not lower than 30000N.
The invention discloses a method for detecting welding tension of an annular fuel assembly guide pipe, which uses the device provided by the invention and comprises the following steps:
step one, screwing one end of a guide pipe into a threaded joint M9X 0.5-6H for clamping a testing machine, and putting the other end of the guide pipe into a olive head with the diameter of 14.90-0.05 for supporting;
step two, mounting the pipe end filled with the olive head in an upper chuck of the testing machine, and then clamping; then moving the lower chuck to reach the proper position of the clamping end of the threaded joint, and clamping the lower end of the test piece;
and step three, starting tensile detection until the guide tube sample is broken.
The invention has the following remarkable effects: according to the invention, in a welding and stretching detection project of the guide pipe of the static load annular fuel assembly at room temperature, the following effects are achieved:
1) one end of the threaded joint is provided with M9X 0.5-6H threads which are connected with the end plug, the other end of the threaded joint is thickened to facilitate clamping, and the tensile strength of the special tool can reach more than 30000N through quenching and tempering treatment.
2) The olive head plugging end is matched with the inner diameter of the pipe, and the tail end is thickened for positioning, so that the olive head plugging end can be prevented from falling into the guide pipe, and the olive head plugging end is convenient to take out of the guide pipe after a test.
3) The special tool for detecting the welding tension of the annular fuel assembly guide pipe is designed and manufactured. Therefore, static load tensile detection of the annular fuel assembly guide pipe at room temperature in a welding tensile mode is achieved.
Drawings
FIG. 1 is a schematic structural diagram of a guide tube welded tensile sample;
FIG. 2 is a schematic view of a threaded joint;
fig. 3 is a schematic structural view of a olive head;
FIG. 4 is a schematic view of a method for detecting the weld tension of a ring fuel assembly guide tube according to the present invention;
in the figure: 1. round hole clamping end, 2. end plug screw thread clamping end, 3. external screw thread, 4. transition zone A, 5. clamping end A, 6. clamping end B, 7. transition zone B, 8. insert end.
Detailed Description
The following describes an apparatus and a method for detecting a weld elongation of a guide tube of an annular fuel assembly in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 2-4, an annular fuel assembly guide pipe welding stretching detection device comprises a threaded joint and a olive head;
the threaded joint is cylindrical as a whole and 77-95mm in length; the right end is an external thread end 3, the length of the external thread end is 25-30mm, the thread size is M9 x 0.5-6H, and the external thread end is used for fixedly connecting a guide pipe.
The left end is a clamping end A5 with the length of 55-75mm, and is used for clamping the testing machine; the connecting part between the clamping end A5 and the external thread end 3 is a transition area A4 with a slope, the outer diameter of the transition area A4 is gradually increased to phi 11mm from phi 9mm of the external thread end 3, and the length is 6-9 mm;
the whole olive head is cylindrical, and the length of the olive head is 55-65 mm; the right end is a clamping end B6, the length is 6-9mm, the diameter is phi 15.7mm, and the clamping end B6 is used for clamping a testing machine; the left end is an insertion end 8, the length is 50-55mm, the outer diameter of the insertion end is phi 14.90mm-0.05 and is used for extending into a sample to be filled, the middle connecting part of the clamping end B6 and the insertion end 8 is a transition region B7 which is a reducing step, and the outer diameter is reduced from phi 15.7 of the clamping end B6 to phi 14.90mm-0.05 of the transition region B7.
Furthermore, the end of the male thread end 3 is chamfered by 0.5.
Furthermore, the top end of the insertion end 8 is processed by a round corner R2.
Furthermore, the material of the threaded joint is 1Cr17Ni2 martensite.
Furthermore, the olive head is made of 1Cr17Ni2 martensite.
Furthermore, the threaded joint is integrally subjected to quenching and tempering treatment, so that the tensile strength of the stretching tool is not lower than 30000N.
Furthermore, the whole olive head is subjected to quenching and tempering treatment, and the tensile strength of the stretching tool is not lower than 30000N.
The invention discloses a method for detecting welding tension of an annular fuel assembly guide pipe, which uses the device provided by the invention and comprises the following steps:
step one, screwing one end of a guide pipe into a threaded joint M9X 0.5-6H for clamping a testing machine, and putting the other end of the guide pipe into a olive head with the diameter of 14.90-0.05 for supporting;
step two, mounting the pipe end filled with the olive head in an upper chuck of the testing machine, and then clamping; then moving the lower chuck to reach the proper position of the clamping end of the threaded joint, and clamping the lower end of the test piece;
and step three, starting tensile detection until the guide tube sample is broken.
Claims (8)
1. The utility model provides a tensile detection device of annular fuel assembly stand pipe welding which characterized in that: comprises a threaded joint and an olive head;
the threaded joint is cylindrical as a whole and 77-95mm in length; the right end is an external thread end (3), the length is 25-30mm, the thread size is M9 x 0.5-6H, and the right end is used for fixedly connecting a guide pipe; the left end is a clamping end A (5), the length is 55-75mm, and the clamping end A is used for clamping the testing machine; the connecting part between the clamping end A (5) and the external thread end (3) is a transition area A (4) with a slope, the outer diameter of the transition area A (4) is gradually increased to phi 11mm from phi 9mm of the external thread end (3), and the length is 6-9 mm;
the whole olive head is cylindrical, and the length of the olive head is 55-65 mm; the right end is a clamping end B (6), the length is 6-9mm, the diameter is phi 15.7mm, and the clamping end B is used for clamping a testing machine; the left end is an insertion end (8), the length is 50-55mm, the outer diameter is phi 14.90mm-0.05 and is used for extending into a sample to be filled, the middle connecting part of the clamping end B (6) and the insertion end (8) is a transition region B (7) which is a diameter-changing step, and the outer diameter is changed from phi 15.7 of the clamping end B (6) to phi 14.90mm-0.05 of the transition region B (7).
2. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the end part of the external thread end (3) is chamfered by 0.5.
3. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the top end of the insertion end (8) is processed by a round corner R2.
4. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the material of the threaded joint is 1Cr17Ni2 martensite.
5. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the olive head is made of 1Cr17Ni2 martensite.
6. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the threaded joint is integrally quenched and tempered, and the tensile strength of the stretching tool is not lower than 30000N.
7. The annular fuel assembly guide pipe welding tension detection device as set forth in claim 1, wherein: the olive head is integrally quenched and tempered, and the tensile strength of the stretching tool is not lower than 30000N.
8. A method for detecting the weld elongation of a guide tube of an annular fuel assembly, which is characterized by using the device of claim 1, and comprising the following steps:
step one, screwing one end of a guide pipe into a threaded joint M9X 0.5-6H for clamping a testing machine, and putting the other end of the guide pipe into a olive head with the diameter of 14.90-0.05 for supporting;
step two, mounting the pipe end filled with the olive head in an upper chuck of the testing machine, and then clamping; then moving the lower chuck to reach the proper position of the clamping end of the threaded joint, and clamping the lower end of the test piece;
and step three, starting tensile detection until the guide tube sample is broken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559914.6A CN111351707B (en) | 2018-12-20 | 2018-12-20 | Device and method for detecting welding tension of annular fuel assembly guide pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559914.6A CN111351707B (en) | 2018-12-20 | 2018-12-20 | Device and method for detecting welding tension of annular fuel assembly guide pipe |
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| CN111351707A true CN111351707A (en) | 2020-06-30 |
| CN111351707B CN111351707B (en) | 2022-12-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112697582A (en) * | 2020-11-16 | 2021-04-23 | 中国石油天然气股份有限公司 | Testing method and system for obliquely-connected pipeline |
| CN113125250A (en) * | 2019-12-30 | 2021-07-16 | 中核北方核燃料元件有限公司 | Tensile detection device of fuel assembly sleeve pipe expanded joint |
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| CN112697582B (en) * | 2020-11-16 | 2023-01-10 | 中国石油天然气股份有限公司 | Testing method and system for obliquely-connected pipeline |
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| CN111351707B (en) | 2022-12-20 |
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